/* roulang page: index */
:root {
            --bg-primary: #14211d;
            --bg-secondary: #1b2b25;
            --bg-card: #1e332b;
            --bg-card-hover: #254236;
            --sidebar-bg: #0e1714;
            --sidebar-border: #223a30;
            --text-primary: #f0f3ee;
            --text-secondary: #c0cac2;
            --text-muted: #8da697;
            --accent-green: #5e9d6f;
            --accent-green-light: #7bbd8c;
            --accent-green-dark: #3e7352;
            --accent-amber: #d6a85c;
            --accent-amber-soft: #f0c47a;
            --border-subtle: rgba(94, 157, 111, 0.22);
            --border-card: rgba(94, 157, 111, 0.16);
            --shadow-card: 0 6px 24px rgba(0, 0, 0, 0.22);
            --shadow-card-hover: 0 14px 34px rgba(0, 0, 0, 0.36);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 22px;
            --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "Alibaba PuHuiTi", system-ui, -apple-system, sans-serif;
            --sidebar-width: 232px;
            --container-max: 1180px;
            --transition-fast: 0.18s ease;
            --transition-med: 0.28s ease;
            --section-padding: 56px 0;
            --section-gap: 20px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image: radial-gradient(circle at 18% 8%, rgba(94, 157, 111, 0.06), transparent 42%),
                radial-gradient(circle at 82% 28%, rgba(214, 168, 92, 0.05), transparent 36%);
            background-attachment: fixed;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            display: block;
            height: auto;
        }

        a {
            color: var(--accent-green-light);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-amber-soft);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-green);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 14px;
            color: var(--text-primary);
        }

        h1,
        h2,
        h3,
        h4,
        h5 {
            font-family: var(--font-sans);
            font-weight: 700;
            line-height: 1.32;
            letter-spacing: -0.01em;
            color: var(--text-primary);
        }

        h1 {
            font-size: clamp(30px, 5vw, 42px);
            margin-bottom: 18px;
        }

        h2 {
            font-size: clamp(22px, 3.2vw, 28px);
            margin-bottom: 14px;
        }

        h3 {
            font-size: clamp(17px, 2.2vw, 20px);
            margin-bottom: 10px;
        }

        p {
            margin-bottom: 16px;
            color: var(--text-secondary);
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 28px;
            padding-right: 28px;
        }

        /* Layout shell */
        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background-color: var(--sidebar-bg);
            border-right: 1px solid var(--sidebar-border);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 22px 16px 18px;
            overflow-y: auto;
            transition: transform var(--transition-med), width var(--transition-med);
        }

        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            padding: 4px 6px 16px;
            border-bottom: 1px solid var(--border-subtle);
            margin-bottom: 18px;
            text-decoration: none;
        }

        .sidebar-brand:hover {
            color: var(--accent-green-light);
        }

        .sidebar-brand .brand-icon {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(145deg, var(--accent-green-dark), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
            color: #f5f8f2;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }

        .sidebar-nav a {
            color: var(--text-muted);
            font-size: 13px;
            font-weight: 500;
            padding: 9px 12px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), color var(--transition-fast), border-left-color var(--transition-fast);
            border-left: 3px solid transparent;
            letter-spacing: 0.01em;
            text-decoration: none;
        }

        .sidebar-nav a:hover {
            background-color: rgba(94, 157, 111, 0.08);
            color: var(--text-primary);
        }

        .sidebar-nav a.active {
            background-color: rgba(94, 157, 111, 0.12);
            color: var(--accent-green-light);
            border-left-color: var(--accent-green);
            font-weight: 600;
        }

        .sidebar-footer {
            padding-top: 16px;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .sidebar-footer a {
            color: var(--text-muted);
            font-size: 12px;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .sidebar-footer a:hover {
            color: var(--text-primary);
        }

        .sidebar-search {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 7px 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-subtle);
            background-color: rgba(255, 255, 255, 0.03);
            color: var(--text-muted);
            font-size: 12px;
        }

        .sidebar-search input {
            background: none;
            border: none;
            outline: none;
            color: var(--text-primary);
            font-size: 12px;
            width: 100%;
        }

        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* Mobile top bar */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1001;
            background-color: var(--sidebar-bg);
            border-bottom: 1px solid var(--sidebar-border);
            padding: 10px 16px;
            align-items: center;
            justify-content: space-between;
        }

        .mobile-topbar .brand {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-topbar .brand .brand-icon {
            width: 28px;
            height: 28px;
            border-radius: 6px;
            background: linear-gradient(145deg, var(--accent-green-dark), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: #f5f8f2;
        }

        .hamburger {
            width: 42px;
            height: 42px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--text-primary);
            background-color: rgba(94, 157, 111, 0.12);
            border: 1px solid var(--border-subtle);
            transition: background var(--transition-fast);
        }

        .hamburger:hover {
            background-color: rgba(94, 157, 111, 0.2);
        }

        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background-color: rgba(0, 0, 0, 0.55);
            z-index: 1000;
        }

        .drawer-overlay.open {
            display: block;
        }

        .drawer {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 260px;
            background-color: var(--sidebar-bg);
            z-index: 1002;
            transform: translateX(-100%);
            transition: transform var(--transition-med);
            padding: 18px 16px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .drawer.open {
            transform: translateX(0);
        }

        .drawer-close {
            align-self: flex-end;
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background-color: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .drawer .sidebar-nav a {
            font-size: 14px;
            padding: 11px 14px;
        }

        .drawer .sidebar-brand {
            font-size: 18px;
            padding: 4px 6px 12px;
            margin-bottom: 12px;
        }

        .drawer .sidebar-footer {
            margin-top: auto;
        }

        /* Section common */
        .section {
            padding: var(--section-padding);
            position: relative;
        }

        .section-alt {
            background-color: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .section-header {
            margin-bottom: 26px;
            max-width: 760px;
        }

        .section-header h2 {
            margin-bottom: 10px;
            font-size: clamp(22px, 3.5vw, 30px);
            letter-spacing: -0.02em;
        }

        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-amber-soft);
            background-color: rgba(214, 168, 92, 0.1);
            border: 1px solid rgba(214, 168, 92, 0.22);
            padding: 3px 12px;
            border-radius: 20px;
            margin-bottom: 10px;
            text-transform: uppercase;
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 680px;
        }

        .section-header p strong {
            color: var(--text-secondary);
            font-weight: 600;
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: 76vh;
            display: flex;
            align-items: center;
            padding: 80px 0 72px;
            overflow: hidden;
            border-bottom: 1px solid var(--border-subtle);
            isolation: isolate;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: -2;
            background-size: cover;
            background-position: center 30%;
            filter: saturate(0.72) brightness(0.55);
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: -1;
            background: linear-gradient(115deg,
                    rgba(14, 23, 20, 0.92) 8%,
                    rgba(14, 23, 20, 0.58) 42%,
                    rgba(20, 33, 29, 0.52) 68%,
                    rgba(14, 23, 20, 0.78) 100%),
                radial-gradient(ellipse at 78% 58%, rgba(94, 157, 111, 0.16), transparent 56%);
        }

        .hero-content {
            max-width: 720px;
            padding: 20px 0;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.1em;
            color: var(--accent-amber-soft);
            background-color: rgba(214, 168, 92, 0.09);
            border: 1px solid rgba(214, 168, 92, 0.24);
            padding: 6px 16px;
            border-radius: 30px;
            margin-bottom: 20px;
        }

        .hero-content h1 {
            font-size: clamp(32px, 6vw, 52px);
            font-weight: 800;
            letter-spacing: -0.03em;
            color: #ffffff;
            margin-bottom: 20px;
            line-height: 1.18;
        }

        .hero-content h1 em {
            font-style: normal;
            color: var(--accent-green-light);
        }

        .hero-content .hero-sub {
            font-size: clamp(15px, 2vw, 18px);
            line-height: 1.8;
            color: #d3dcd4;
            margin-bottom: 30px;
            max-width: 620px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 14px;
            padding: 12px 26px;
            border-radius: var(--radius-md);
            transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            letter-spacing: 0.01em;
        }

        .btn-primary {
            background-color: var(--accent-green);
            color: #ffffff;
            border: 1px solid var(--accent-green);
            box-shadow: 0 6px 18px rgba(94, 157, 111, 0.28);
        }

        .btn-primary:hover {
            background-color: var(--accent-green-light);
            border-color: var(--accent-green-light);
            box-shadow: 0 10px 24px rgba(94, 157, 111, 0.4);
            transform: translateY(-2px);
            color: #ffffff;
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.24);
        }

        .btn-secondary:hover {
            border-color: var(--accent-amber-soft);
            color: var(--accent-amber-soft);
            background-color: rgba(214, 168, 92, 0.06);
            transform: translateY(-2px);
        }

        .hero-metrics {
            display: flex;
            gap: 32px;
            margin-top: 34px;
            flex-wrap: wrap;
        }

        .hero-metric {
            min-width: 80px;
        }

        .hero-metric .num {
            font-size: 26px;
            font-weight: 700;
            color: var(--accent-amber-soft);
            letter-spacing: -0.02em;
        }

        .hero-metric .label {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* Service matrix */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .service-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 22px 20px;
            transition: background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            color: var(--text-primary);
            display: flex;
            flex-direction: column;
            min-height: 170px;
        }

        .service-card:hover {
            background-color: var(--bg-card-hover);
            border-color: var(--border-subtle);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            color: var(--text-primary);
        }

        .service-card .icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background-color: rgba(94, 157, 111, 0.16);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 14px;
            flex-shrink: 0;
        }

        .service-card h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .service-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* Data strip */
        .data-strip {
            background-color: var(--bg-secondary);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 22px 26px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            box-shadow: var(--shadow-card);
        }

        .data-item {
            text-align: center;
            padding: 4px 8px;
            border-right: 1px solid var(--border-subtle);
        }

        .data-item:last-child {
            border-right: none;
        }

        .data-item .data-num {
            font-size: 34px;
            font-weight: 800;
            color: var(--accent-green-light);
            letter-spacing: -0.03em;
            line-height: 1.2;
        }

        .data-item .data-desc {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
            font-weight: 500;
        }

        /* Advantages */
        .adv-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .adv-card {
            background-color: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 22px;
            border: 1px solid var(--border-card);
            transition: border-color var(--transition-fast), background var(--transition-fast);
        }

        .adv-card:hover {
            border-color: var(--border-subtle);
            background-color: var(--bg-card-hover);
        }

        .adv-card .adv-num {
            font-size: 28px;
            font-weight: 700;
            color: var(--accent-amber-soft);
            letter-spacing: -0.02em;
        }

        .adv-card .adv-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .adv-card p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 10px;
            margin-bottom: 0;
            line-height: 1.65;
        }

        /* Flow steps */
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 14px;
        }

        .flow-step {
            position: relative;
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            transition: background var(--transition-fast), transform var(--transition-fast);
        }

        .flow-step:hover {
            background-color: var(--bg-card-hover);
            transform: translateY(-3px);
        }

        .flow-step .step-num {
            font-size: 12px;
            font-weight: 700;
            color: var(--accent-green-light);
            letter-spacing: 0.08em;
            margin-bottom: 8px;
            display: block;
        }

        .flow-step h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-primary);
        }

        .flow-step p {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* Scene cards */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .scene-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
            position: relative;
            min-height: 190px;
            display: flex;
            align-items: flex-end;
        }

        .scene-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .scene-card .scene-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.52;
            transition: opacity var(--transition-fast);
        }

        .scene-card:hover .scene-bg {
            opacity: 0.7;
        }

        .scene-card .scene-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(14, 23, 20, 0.95) 8%, transparent 65%);
        }

        .scene-card .scene-info {
            position: relative;
            z-index: 2;
            padding: 18px 16px;
            width: 100%;
        }

        .scene-card h4 {
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 4px;
        }

        .scene-card p {
            font-size: 12px;
            color: #cbd5cc;
            margin-bottom: 0;
        }

        /* Case wall */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .case-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 22px;
            transition: background var(--transition-fast), transform var(--transition-fast);
        }

        .case-card:hover {
            background-color: var(--bg-card-hover);
            transform: translateY(-3px);
        }

        .case-card .case-head {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }

        .case-card .case-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: rgba(94, 157, 111, 0.18);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            color: var(--accent-green-light);
            flex-shrink: 0;
        }

        .case-card .case-user {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .case-card .case-user span {
            display: block;
            font-size: 11px;
            font-weight: 400;
            color: var(--text-muted);
        }

        .case-card p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* News list */
        .news-list {
            display: grid;
            gap: 12px;
        }

        .news-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 16px 18px;
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            color: var(--text-primary);
        }

        .news-item:hover {
            background-color: var(--bg-card-hover);
            border-color: var(--border-subtle);
            transform: translateY(-2px);
            color: var(--text-primary);
        }

        .news-date {
            font-size: 12px;
            color: var(--accent-amber-soft);
            font-weight: 600;
            min-width: 72px;
            flex-shrink: 0;
        }

        .news-body {
            flex: 1;
            min-width: 0;
        }

        .news-body h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .news-body p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 0;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* Column deep dive */
        .column-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .column-card {
            background-color: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-card);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
            text-decoration: none;
            color: var(--text-primary);
            display: flex;
            flex-direction: column;
        }

        .column-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            color: var(--text-primary);
        }

        .column-card .thumb {
            aspect-ratio: 16 / 9;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .column-card .thumb .thumb-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background-color: rgba(14, 23, 20, 0.85);
            border: 1px solid var(--border-subtle);
            border-radius: 20px;
            padding: 3px 12px;
            font-size: 11px;
            color: var(--accent-amber-soft);
            font-weight: 500;
        }

        .column-card .info {
            padding: 18px 18px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .column-card .info h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .column-card .info p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.65;
            flex: 1;
        }

        .column-card .read-more {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-green-light);
            margin-top: 12px;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* Brand intro */
        .brand-intro {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: center;
        }

        .brand-intro .brand-text {
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-secondary);
        }

        .brand-intro .brand-text p {
            margin-bottom: 14px;
        }

        .brand-intro .brand-text p:last-child {
            margin-bottom: 0;
        }

        .brand-intro .brand-visual {
            border-radius: var(--radius-xl);
            overflow: hidden;
            aspect-ratio: 4 / 3;
            background-size: cover;
            background-position: center;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
        }

        /* Community */
        .community-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .community-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            transition: background var(--transition-fast);
        }

        .community-card:hover {
            background-color: var(--bg-card-hover);
        }

        .community-card .com-user {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 10px;
            font-size: 12px;
            color: var(--accent-green-light);
            font-weight: 600;
        }

        .community-card .com-user .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--accent-green);
            flex-shrink: 0;
        }

        .community-card p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.65;
        }

        /* Partners */
        .partners-row {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
            justify-content: flex-start;
        }

        .partner-placeholder {
            padding: 12px 22px;
            border: 1px dashed var(--border-subtle);
            border-radius: var(--radius-md);
            font-size: 13px;
            color: var(--text-muted);
            background-color: rgba(255, 255, 255, 0.02);
            transition: border-color var(--transition-fast), color var(--transition-fast);
            letter-spacing: 0.04em;
        }

        .partner-placeholder:hover {
            border-color: var(--accent-green);
            color: var(--text-primary);
        }

        /* FAQ */
        .faq-list {
            display: grid;
            gap: 10px;
            max-width: 840px;
        }

        .faq-item {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--border-subtle);
        }

        .faq-item summary {
            padding: 18px 20px;
            font-weight: 600;
            font-size: 14px;
            color: var(--text-primary);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: background var(--transition-fast);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            background-color: rgba(94, 157, 111, 0.06);
        }

        .faq-item summary .faq-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--accent-green);
            flex-shrink: 0;
        }

        .faq-item summary .faq-icon {
            margin-left: auto;
            font-size: 18px;
            color: var(--text-muted);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
        }

        .faq-item .faq-answer {
            padding: 0 20px 18px 40px;
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* Guarantee bar */
        .guarantee-bar {
            background-color: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 20px 26px;
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            align-items: center;
            justify-content: space-between;
        }

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .guarantee-item .g-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background-color: rgba(94, 157, 111, 0.14);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
        }

        /* Contact form */
        .contact-form-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: start;
        }

        .contact-form {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 28px;
            display: grid;
            gap: 16px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 5px;
        }

        .form-group label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
        }

        .form-group input,
        .form-group textarea {
            padding: 11px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-subtle);
            background-color: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            transition: border-color var(--transition-fast);
            font-size: 14px;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--accent-green);
            outline: none;
        }

        .form-group textarea {
            resize: vertical;
            min-height: 100px;
        }

        .form-hint {
            font-size: 12px;
            color: var(--text-muted);
        }

        .contact-info {
            padding: 8px 0;
        }

        .contact-info h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }

        .contact-info p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .contact-info ul {
            list-style: none;
            padding: 0;
            display: grid;
            gap: 10px;
        }

        .contact-info ul li {
            font-size: 14px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .contact-info ul li strong {
            color: var(--text-primary);
            font-weight: 600;
        }

        /* Footer */
        .site-footer {
            background-color: var(--sidebar-bg);
            border-top: 1px solid var(--sidebar-border);
            padding: 32px 0 28px;
            margin-top: 0;
        }

        .site-footer .footer-inner {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            align-items: center;
            justify-content: space-between;
        }

        .site-footer .footer-brand {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .site-footer .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 13px;
        }

        .site-footer .footer-links a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .site-footer .footer-links a:hover {
            color: var(--text-primary);
        }

        .site-footer .copyright {
            font-size: 12px;
            color: var(--text-muted);
            width: 100%;
            text-align: center;
            padding-top: 18px;
            border-top: 1px solid var(--border-subtle);
            margin-top: 6px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 210px;
                --section-padding: 44px 0;
            }
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .adv-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-steps {
                grid-template-columns: repeat(3, 1fr);
            }
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .column-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .community-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .brand-intro {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .contact-form-wrap {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .data-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .data-item {
                border-right: none;
            }
            .hero {
                min-height: 62vh;
                padding: 60px 0 56px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 36px 0;
                --sidebar-width: 0px;
            }
            .sidebar {
                display: none;
            }
            .mobile-topbar {
                display: flex;
            }
            .drawer-overlay.open {
                display: block;
            }
            .main-content {
                margin-left: 0;
                padding-top: 60px;
            }
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }
            .service-grid {
                grid-template-columns: 1fr;
            }
            .adv-grid {
                grid-template-columns: 1fr;
            }
            .flow-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .column-grid {
                grid-template-columns: 1fr;
            }
            .community-grid {
                grid-template-columns: 1fr;
            }
            .data-strip {
                grid-template-columns: repeat(2, 1fr);
                padding: 16px;
            }
            .hero {
                min-height: 52vh;
                padding: 50px 0 44px;
            }
            .hero-content h1 {
                font-size: clamp(26px, 7vw, 36px);
            }
            .hero-metrics {
                gap: 18px;
            }
            .news-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .guarantee-bar {
                flex-direction: column;
                align-items: flex-start;
                padding: 16px;
            }
            .partners-row {
                gap: 10px;
            }
            .brand-intro .brand-visual {
                aspect-ratio: 16/9;
            }
            .site-footer .footer-inner {
                flex-direction: column;
                text-align: center;
                gap: 14px;
            }
            .site-footer .footer-links {
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .flow-steps {
                grid-template-columns: 1fr;
            }
            .data-strip {
                grid-template-columns: 1fr;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-metrics {
                gap: 12px;
            }
            .hero-metric .num {
                font-size: 22px;
            }
            .contact-form {
                padding: 20px 16px;
            }
            .section-header h2 {
                font-size: 21px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #14211d;
            --bg-secondary: #1b2b25;
            --bg-card: #1e332b;
            --bg-card-hover: #254236;
            --sidebar-bg: #0e1714;
            --sidebar-border: #223a30;
            --text-primary: #f0f3ee;
            --text-secondary: #c0cac2;
            --text-muted: #8da697;
            --accent-green: #5e9d6f;
            --accent-green-light: #7bbd8c;
            --accent-green-dark: #3e7352;
            --accent-amber: #d6a85c;
            --accent-amber-soft: #f0c47a;
            --border-subtle: rgba(94, 157, 111, 0.22);
            --border-card: rgba(94, 157, 111, 0.16);
            --shadow-card: 0 6px 24px rgba(0, 0, 0, 0.22);
            --shadow-card-hover: 0 14px 34px rgba(0, 0, 0, 0.36);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 22px;
            --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "Alibaba PuHuiTi", system-ui, -apple-system, sans-serif;
            --sidebar-width: 210px;
            --container-max: 1180px;
            --transition-fast: 0.18s ease;
            --transition-med: 0.28s ease;
            --section-padding: 44px 0;
            --section-gap: 20px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image: radial-gradient(circle at 18% 8%, rgba(94, 157, 111, 0.06), transparent 42%),
                radial-gradient(circle at 82% 28%, rgba(214, 168, 92, 0.05), transparent 36%);
            background-attachment: fixed;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        img {
            max-width: 100%;
            display: block;
            height: auto;
        }

        a {
            color: var(--accent-green-light);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-amber-soft);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-green);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 14px;
            color: var(--text-primary);
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 28px;
            padding-right: 28px;
        }

        /* Sidebar / App Shell */
        .sidebar {
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background-color: var(--sidebar-bg);
            border-right: 1px solid var(--sidebar-border);
            display: flex;
            flex-direction: column;
            padding: 20px 14px 16px;
            z-index: 1000;
            transition: transform var(--transition-med);
        }

        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            padding: 4px 6px 16px;
            border-bottom: 1px solid var(--border-subtle);
            margin-bottom: 18px;
            text-decoration: none;
        }

        .sidebar-brand:hover {
            color: var(--accent-green-light);
        }

        .sidebar-brand .brand-icon {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(145deg, var(--accent-green-dark), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
            color: #f5f8f2;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
            overflow-y: auto;
            padding: 2px 0;
        }

        .sidebar-nav a {
            color: var(--text-muted);
            font-size: 13px;
            font-weight: 500;
            padding: 9px 12px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), color var(--transition-fast), border-left-color var(--transition-fast);
            border-left: 3px solid transparent;
            letter-spacing: 0.01em;
            text-decoration: none;
            display: block;
        }

        .sidebar-nav a:hover {
            background-color: rgba(94, 157, 111, 0.08);
            color: var(--text-primary);
        }

        .sidebar-nav a.active {
            background-color: rgba(94, 157, 111, 0.12);
            color: var(--accent-green-light);
            border-left-color: var(--accent-green);
            font-weight: 600;
        }

        .sidebar-footer {
            padding-top: 16px;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .sidebar-footer a {
            color: var(--text-muted);
            font-size: 12px;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .sidebar-footer a:hover {
            color: var(--text-primary);
        }

        .sidebar-subscribe {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 7px 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-subtle);
            color: var(--text-muted);
            font-size: 12px;
            cursor: pointer;
            transition: border-color var(--transition-fast), color var(--transition-fast);
            background: transparent;
            width: 100%;
            text-align: left;
        }

        .sidebar-subscribe:hover {
            border-color: var(--accent-green);
            color: var(--text-primary);
        }

        /* Main content */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* Mobile top bar */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background-color: var(--sidebar-bg);
            border-bottom: 1px solid var(--sidebar-border);
            z-index: 999;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
        }

        .mobile-topbar .mobile-brand {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-topbar .mobile-brand .brand-icon {
            width: 28px;
            height: 28px;
            border-radius: 7px;
            background: linear-gradient(145deg, var(--accent-green-dark), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: #f5f8f2;
        }

        .hamburger-btn {
            width: 40px;
            height: 40px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: var(--radius-sm);
            background: transparent;
            border: 1px solid var(--border-subtle);
            transition: border-color var(--transition-fast);
        }

        .hamburger-btn:hover {
            border-color: var(--accent-green);
        }

        .hamburger-btn span {
            display: block;
            width: 20px;
            height: 2px;
            background-color: var(--text-primary);
            border-radius: 2px;
            transition: transform var(--transition-fast), opacity var(--transition-fast);
        }

        .hamburger-btn.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger-btn.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition-med);
        }

        .sidebar-overlay.show {
            opacity: 1;
        }

        /* Sections */
        section {
            padding: var(--section-padding);
        }

        .section-alt {
            background-color: rgba(27, 43, 37, 0.55);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .section-header {
            margin-bottom: 28px;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .section-header .section-title {
            font-size: 24px;
            font-weight: 700;
            letter-spacing: 0.01em;
            color: var(--text-primary);
        }

        .section-header .section-subtitle {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 6px;
            max-width: 520px;
        }

        .section-more-link {
            font-size: 13px;
            color: var(--accent-green-light);
            font-weight: 500;
            white-space: nowrap;
            padding: 6px 14px;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), border-color var(--transition-fast);
        }

        .section-more-link:hover {
            background: rgba(94, 157, 111, 0.1);
            border-color: var(--accent-green);
        }

        /* Category page header */
        .category-header {
            position: relative;
            padding: 48px 0 40px;
            background: linear-gradient(180deg, rgba(14, 23, 20, 0.2), var(--bg-primary)), url('/assets/images/1cff573a8acc039d.webp') center/cover no-repeat;
            border-bottom: 1px solid var(--border-subtle);
            min-height: 220px;
            display: flex;
            align-items: center;
        }

        .category-header::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(14, 23, 20, 0.65);
            pointer-events: none;
        }

        .category-header .container {
            position: relative;
            z-index: 1;
        }

        .category-header h1 {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .category-header .category-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.8;
        }

        .category-header .tag-row {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-top: 16px;
        }

        .tag-chip {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(94, 157, 111, 0.15);
            color: var(--accent-green-light);
            border: 1px solid var(--border-subtle);
        }

        /* Article list cards */
        .article-list-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
        }

        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-med);
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(94, 157, 111, 0.32);
            background: var(--bg-card-hover);
        }

        .article-card .card-image {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: var(--bg-secondary);
        }

        .article-card .card-body {
            padding: 18px 18px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-card .card-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }

        .article-card .card-title {
            font-size: 16px;
            font-weight: 650;
            color: var(--text-primary);
            line-height: 1.5;
            margin-bottom: 8px;
        }

        .article-card .card-title a {
            color: inherit;
            text-decoration: none;
        }

        .article-card .card-title a:hover {
            color: var(--accent-green-light);
        }

        .article-card .card-excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 12px;
        }

        .article-card .card-read-more {
            font-size: 12px;
            color: var(--accent-green-light);
            font-weight: 500;
            align-self: flex-start;
            transition: color var(--transition-fast);
        }

        .article-card .card-read-more:hover {
            color: var(--accent-amber-soft);
        }

        /* Extended topics */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
            gap: 16px;
        }

        .topic-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 20px 18px;
            transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-med);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .topic-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card);
            border-color: rgba(94, 157, 111, 0.28);
        }

        .topic-card .topic-icon {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: rgba(94, 157, 111, 0.16);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--accent-green-light);
            margin-bottom: 4px;
        }

        .topic-card .topic-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .topic-card .topic-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* Data snapshot */
        .data-snapshot-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 16px;
        }

        .data-snapshot-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            text-align: center;
            transition: border-color var(--transition-fast), background var(--transition-fast);
        }

        .data-snapshot-item:hover {
            border-color: rgba(94, 157, 111, 0.32);
            background: var(--bg-card-hover);
        }

        .data-snapshot-item .data-number {
            font-size: 28px;
            font-weight: 700;
            color: var(--accent-green-light);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .data-snapshot-item .data-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 820px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

        .faq-item:hover {
            border-color: rgba(94, 157, 111, 0.28);
        }

        .faq-item summary {
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color var(--transition-fast);
            user-select: none;
        }

        .faq-item summary:hover {
            color: var(--accent-green-light);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: "+";
            font-size: 20px;
            font-weight: 400;
            color: var(--accent-green-light);
            transition: transform var(--transition-fast);
        }

        .faq-item[open] summary::after {
            content: "−";
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            border-top: 1px dashed var(--border-subtle);
            padding-top: 12px;
            margin: 0 20px;
            padding-left: 0;
            padding-right: 0;
        }

        /* Featured articles */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
        }

        .featured-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform var(--transition-med), box-shadow var(--transition-med);
            display: flex;
        }

        .featured-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card);
        }

        .featured-card .featured-image {
            width: 40%;
            min-height: 160px;
            object-fit: cover;
            background: var(--bg-secondary);
        }

        .featured-card .featured-body {
            padding: 18px 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }

        .featured-card .featured-label {
            font-size: 11px;
            font-weight: 600;
            color: var(--accent-amber-soft);
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }

        .featured-card .featured-title {
            font-size: 16px;
            font-weight: 650;
            color: var(--text-primary);
            line-height: 1.5;
        }

        .featured-card .featured-excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
            flex: 1;
        }

        .featured-card .featured-link {
            font-size: 12px;
            color: var(--accent-green-light);
            font-weight: 500;
        }

        /* Subscribe / CTA */
        .subscribe-box {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            max-width: 720px;
            margin: 0 auto;
            text-align: center;
        }

        .subscribe-box .subscribe-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .subscribe-box .subscribe-desc {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
            line-height: 1.7;
        }

        .subscribe-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .subscribe-form input {
            flex: 1;
            min-width: 220px;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-subtle);
            background: var(--bg-secondary);
            color: var(--text-primary);
            transition: border-color var(--transition-fast);
        }

        .subscribe-form input::placeholder {
            color: var(--text-muted);
        }

        .subscribe-form input:focus {
            border-color: var(--accent-green);
            outline: none;
        }

        .subscribe-form .btn-primary {
            padding: 10px 22px;
            background: var(--accent-green);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            transition: background var(--transition-fast), transform var(--transition-fast);
            white-space: nowrap;
        }

        .subscribe-form .btn-primary:hover {
            background: var(--accent-green-light);
            transform: translateY(-1px);
        }

        .subscribe-form .btn-primary:active {
            transform: translateY(0);
        }

        .btn-secondary-ghost {
            padding: 10px 18px;
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 500;
            transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
        }

        .btn-secondary-ghost:hover {
            border-color: var(--accent-green);
            color: var(--text-primary);
            background: rgba(94, 157, 111, 0.06);
        }

        /* Footer */
        .site-footer {
            background: var(--sidebar-bg);
            border-top: 1px solid var(--sidebar-border);
            padding: 32px 0 24px;
            margin-top: 0;
        }

        .footer-inner {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .footer-links {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 12px;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--text-primary);
        }

        .copyright {
            margin-top: 20px;
            padding-top: 16px;
            border-top: 1px solid var(--border-subtle);
            font-size: 12px;
            color: var(--text-muted);
            letter-spacing: 0.01em;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 72px;
                --section-padding: 36px 0;
            }

            .sidebar {
                padding: 18px 8px 14px;
                align-items: center;
            }

            .sidebar-brand {
                font-size: 0;
                gap: 0;
                padding: 4px 0 14px;
                justify-content: center;
                border-bottom: 1px solid var(--border-subtle);
                margin-bottom: 14px;
                width: 100%;
            }

            .sidebar-brand .brand-icon {
                font-size: 16px;
                width: 32px;
                height: 32px;
            }

            .sidebar-nav a {
                font-size: 0;
                padding: 10px;
                text-align: center;
                border-left: none;
                border-bottom: 3px solid transparent;
                border-radius: var(--radius-sm);
                display: flex;
                align-items: center;
                justify-content: center;
                gap: 0;
            }

            .sidebar-nav a::first-letter {
                font-size: 14px;
                font-weight: 600;
            }

            .sidebar-nav a.active {
                border-left-color: transparent;
                border-bottom-color: var(--accent-green);
            }

            .sidebar-footer {
                align-items: center;
            }

            .sidebar-footer a {
                font-size: 0;
            }

            .sidebar-footer a::first-letter {
                font-size: 12px;
            }

            .sidebar-subscribe {
                font-size: 0;
                justify-content: center;
                padding: 8px 10px;
            }

            .sidebar-subscribe::first-letter {
                font-size: 13px;
            }

            .main-wrapper {
                margin-left: var(--sidebar-width);
            }

            .category-header h1 {
                font-size: 26px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
                --section-padding: 28px 0;
            }

            .sidebar {
                transform: translateX(-100%);
                width: 240px;
                padding: 20px 14px 16px;
                align-items: stretch;
                z-index: 1001;
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .sidebar-brand {
                font-size: 18px;
                gap: 10px;
                justify-content: flex-start;
                padding: 4px 6px 16px;
            }

            .sidebar-nav a {
                font-size: 13px;
                padding: 9px 12px;
                text-align: left;
                border-left: 3px solid transparent;
                border-bottom: none;
                display: block;
            }

            .sidebar-nav a.active {
                border-left-color: var(--accent-green);
                border-bottom-color: transparent;
            }

            .sidebar-footer a {
                font-size: 12px;
            }

            .sidebar-subscribe {
                font-size: 12px;
                justify-content: flex-start;
                padding: 7px 12px;
                text-align: left;
            }

            .mobile-topbar {
                display: flex;
            }

            .sidebar-overlay {
                display: block;
                pointer-events: none;
            }

            .sidebar-overlay.show {
                pointer-events: auto;
            }

            .main-wrapper {
                margin-left: 0;
                padding-top: 56px;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .category-header {
                min-height: 180px;
                padding: 32px 0 28px;
            }

            .category-header h1 {
                font-size: 22px;
            }

            .category-header .category-desc {
                font-size: 13px;
                line-height: 1.7;
            }

            .section-header .section-title {
                font-size: 20px;
            }

            .article-list-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .topic-grid {
                grid-template-columns: 1fr;
            }

            .data-snapshot-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .data-snapshot-item .data-number {
                font-size: 22px;
            }

            .featured-grid {
                grid-template-columns: 1fr;
            }

            .featured-card {
                flex-direction: column;
            }

            .featured-card .featured-image {
                width: 100%;
                aspect-ratio: 16/9;
                min-height: auto;
            }

            .subscribe-box {
                padding: 24px 18px;
            }

            .subscribe-form {
                flex-direction: column;
                gap: 10px;
            }

            .subscribe-form input {
                min-width: 100%;
            }

            .footer-inner {
                flex-direction: column;
                gap: 16px;
            }

            .footer-links {
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .data-snapshot-grid {
                grid-template-columns: 1fr;
            }

            .section-header {
                flex-direction: column;
                align-items: flex-start;
            }

            .category-header h1 {
                font-size: 20px;
            }

            .article-card .card-title {
                font-size: 15px;
            }

            .featured-card .featured-title {
                font-size: 15px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #14211d;
            --bg-secondary: #1b2b25;
            --bg-card: #1e332b;
            --bg-card-hover: #254236;
            --sidebar-bg: #0e1714;
            --sidebar-border: #223a30;
            --text-primary: #f0f3ee;
            --text-secondary: #c0cac2;
            --text-muted: #8da697;
            --accent-green: #5e9d6f;
            --accent-green-light: #7bbd8c;
            --accent-green-dark: #3e7352;
            --accent-amber: #d6a85c;
            --accent-amber-soft: #f0c47a;
            --border-subtle: rgba(94, 157, 111, 0.22);
            --border-card: rgba(94, 157, 111, 0.16);
            --shadow-card: 0 6px 24px rgba(0, 0, 0, 0.22);
            --shadow-card-hover: 0 14px 34px rgba(0, 0, 0, 0.36);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 22px;
            --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "Alibaba PuHuiTi", system-ui, -apple-system, sans-serif;
            --sidebar-width: 232px;
            --container-max: 1180px;
            --transition-fast: 0.18s ease;
            --transition-med: 0.28s ease;
            --section-padding: 56px 0;
            --section-gap: 20px;
            --mobile-header-height: 58px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image: radial-gradient(circle at 18% 8%, rgba(94, 157, 111, 0.06), transparent 42%),
                radial-gradient(circle at 82% 28%, rgba(214, 168, 92, 0.05), transparent 36%);
            background-attachment: fixed;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        img {
            max-width: 100%;
            display: block;
            height: auto;
        }

        a {
            color: var(--accent-green-light);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-amber-soft);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-green);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 14px;
            color: var(--text-primary);
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 28px;
            padding-right: 28px;
        }

        /* ========== Sidebar Navigation ========== */
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }

        .sidebar-nav a {
            color: var(--text-muted);
            font-size: 13px;
            font-weight: 500;
            padding: 9px 12px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), color var(--transition-fast), border-left-color var(--transition-fast);
            border-left: 3px solid transparent;
            letter-spacing: 0.01em;
            text-decoration: none;
        }

        .sidebar-nav a:hover {
            background-color: rgba(94, 157, 111, 0.08);
            color: var(--text-primary);
        }

        .sidebar-nav a.active {
            background-color: rgba(94, 157, 111, 0.12);
            color: var(--accent-green-light);
            border-left-color: var(--accent-green);
            font-weight: 600;
        }

        .sidebar-footer {
            padding-top: 16px;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .sidebar-footer a {
            color: var(--text-muted);
            font-size: 12px;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .sidebar-footer a:hover {
            color: var(--text-primary);
        }

        .sidebar-search {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 7px 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-subtle);
            color: var(--text-muted);
            margin-bottom: 12px;
            transition: border-color var(--transition-fast), color var(--transition-fast);
        }

        .sidebar-search:hover {
            border-color: var(--accent-green);
            color: var(--text-secondary);
        }

        .sidebar-search .search-icon {
            flex-shrink: 0;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 18px;
            height: 18px;
        }

        .sidebar-search span {
            font-size: 12px;
            letter-spacing: 0.02em;
        }

        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            padding: 4px 6px 16px;
            border-bottom: 1px solid var(--border-subtle);
            margin-bottom: 18px;
            text-decoration: none;
        }

        .sidebar-brand:hover {
            color: var(--accent-green-light);
        }

        .sidebar-brand .brand-icon {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(145deg, var(--accent-green-dark), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
            color: #f5f8f2;
        }

        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background-color: var(--sidebar-bg);
            border-right: 1px solid var(--sidebar-border);
            display: flex;
            flex-direction: column;
            padding: 20px 14px 18px;
            z-index: 1000;
            overflow-y: auto;
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.18);
        }

        .main-wrapper {
            margin-left: var(--sidebar-width);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
            flex: 1;
        }

        main {
            flex: 1;
            padding-bottom: 0;
        }

        /* ========== Mobile Header ========== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--mobile-header-height);
            background-color: var(--sidebar-bg);
            border-bottom: 1px solid var(--sidebar-border);
            z-index: 999;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
        }

        .mobile-header .mobile-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
            letter-spacing: 0.02em;
        }

        .mobile-header .mobile-brand .brand-icon {
            width: 28px;
            height: 28px;
            border-radius: 7px;
            background: linear-gradient(145deg, var(--accent-green-dark), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            flex-shrink: 0;
            color: #f5f8f2;
        }

        .hamburger-btn {
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding: 8px;
            border-radius: var(--radius-sm);
            background: transparent;
            border: 1px solid var(--border-subtle);
            transition: background var(--transition-fast), border-color var(--transition-fast);
            cursor: pointer;
            color: var(--text-primary);
        }

        .hamburger-btn:hover {
            background-color: rgba(94, 157, 111, 0.1);
            border-color: var(--accent-green);
        }

        .hamburger-btn .bar {
            display: block;
            width: 18px;
            height: 2px;
            background-color: var(--text-primary);
            border-radius: 2px;
            transition: background var(--transition-fast);
        }

        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background-color: rgba(0, 0, 0, 0.55);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition-med);
        }

        .drawer-overlay.visible {
            opacity: 1;
        }

        .drawer {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 260px;
            background-color: var(--sidebar-bg);
            border-right: 1px solid var(--sidebar-border);
            z-index: 1001;
            display: flex;
            flex-direction: column;
            padding: 20px 16px 18px;
            transform: translateX(-100%);
            transition: transform var(--transition-med);
            box-shadow: 4px 0 24px rgba(0, 0, 0, 0.3);
        }

        .drawer.open {
            transform: translateX(0);
        }

        .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 18px;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--border-subtle);
        }

        .drawer-header .drawer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
        }

        .drawer-close {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--text-muted);
            background: none;
            border: 1px solid var(--border-subtle);
            transition: background var(--transition-fast), color var(--transition-fast);
            cursor: pointer;
            line-height: 1;
        }

        .drawer-close:hover {
            background-color: rgba(94, 157, 111, 0.12);
            color: var(--text-primary);
        }

        .drawer .sidebar-nav {
            flex: 1;
            gap: 4px;
        }

        .drawer .sidebar-nav a {
            font-size: 14px;
            padding: 11px 12px;
        }

        .drawer .sidebar-footer {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        /* ========== Section Common ========== */
        section {
            padding: var(--section-padding);
            position: relative;
        }

        section.alt-bg {
            background-color: var(--bg-secondary);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-amber);
            margin-bottom: 10px;
        }

        .section-label::before {
            content: '';
            width: 18px;
            height: 2px;
            background-color: var(--accent-amber);
            border-radius: 2px;
        }

        .section-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            margin-bottom: 14px;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.02em;
            text-decoration: none;
            transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--accent-green-dark);
            color: #f5f8f2;
            border: 1px solid transparent;
        }

        .btn-primary:hover {
            background-color: var(--accent-green);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(94, 157, 111, 0.25);
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-subtle);
        }

        .btn-secondary:hover {
            border-color: var(--accent-green);
            background-color: rgba(94, 157, 111, 0.08);
            color: var(--accent-green-light);
        }

        .btn-small {
            padding: 7px 14px;
            font-size: 13px;
            border-radius: 6px;
        }

        /* ========== Category Header ========== */
        .category-header {
            background-color: var(--bg-secondary);
            border-bottom: 1px solid var(--border-subtle);
            padding: 44px 0 40px;
            position: relative;
            overflow: hidden;
        }

        .category-header::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/3abc64f704504455.webp');
            background-size: cover;
            background-position: center 30%;
            opacity: 0.18;
            z-index: 0;
        }

        .category-header::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(20, 33, 29, 0.35) 0%, rgba(20, 33, 29, 0.92) 80%);
            z-index: 1;
        }

        .category-header .container {
            position: relative;
            z-index: 2;
        }

        .category-header h1 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            margin-bottom: 10px;
        }

        .category-header .category-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.85;
        }

        .category-header .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        .category-header .breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .category-header .breadcrumb a:hover {
            color: var(--accent-green-light);
        }

        .category-header .breadcrumb .sep {
            color: var(--text-muted);
            opacity: 0.6;
        }

        /* ========== Article List Section ========== */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
            margin-top: 8px;
        }

        .article-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-med);
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(94, 157, 111, 0.35);
        }

        .article-card .card-image-link {
            display: block;
            aspect-ratio: 16/9;
            overflow: hidden;
            background-color: var(--bg-secondary);
        }

        .article-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-med);
        }

        .article-card:hover img {
            transform: scale(1.04);
        }

        .article-card .card-body {
            padding: 18px 18px 16px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-card .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
            flex-wrap: wrap;
        }

        .article-card .card-meta .tag {
            background-color: rgba(94, 157, 111, 0.15);
            color: var(--accent-green-light);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 0.04em;
        }

        .article-card h3 {
            font-size: 16px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 8px;
        }

        .article-card h3 a {
            color: var(--text-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .article-card h3 a:hover {
            color: var(--accent-green-light);
        }

        .article-card .card-excerpt {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card .read-more {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12.5px;
            color: var(--accent-green-light);
            margin-top: 12px;
            font-weight: 500;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .article-card .read-more:hover {
            color: var(--accent-amber-soft);
        }

        .article-section-footer {
            display: flex;
            justify-content: flex-end;
            margin-top: 18px;
        }

        .article-section-footer .btn {
            font-size: 13px;
        }

        /* ========== Topic Cards ========== */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 16px;
            margin-top: 8px;
        }

        .topic-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 20px 18px;
            transition: transform var(--transition-med), border-color var(--transition-med), background var(--transition-med);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .topic-card:hover {
            transform: translateY(-3px);
            border-color: rgba(94, 157, 111, 0.4);
            background-color: var(--bg-card-hover);
        }

        .topic-card .topic-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background-color: rgba(94, 157, 111, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            color: var(--accent-green-light);
            flex-shrink: 0;
        }

        .topic-card h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .topic-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* ========== Data Snapshot ========== */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 16px;
            margin-top: 8px;
        }

        .data-block {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 22px 16px;
            text-align: center;
            transition: transform var(--transition-med), border-color var(--transition-med);
        }

        .data-block:hover {
            transform: translateY(-3px);
            border-color: rgba(94, 157, 111, 0.35);
        }

        .data-block .data-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--accent-green-light);
            line-height: 1.2;
            letter-spacing: -0.01em;
        }

        .data-block .data-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 8px;
        }

        .faq-item {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

        .faq-item:hover {
            border-color: rgba(94, 157, 111, 0.35);
        }

        .faq-item details summary {
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 18px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            transition: background var(--transition-fast);
            position: relative;
        }

        .faq-item details summary::-webkit-details-marker {
            display: none;
        }

        .faq-item details summary::after {
            content: '+';
            font-size: 20px;
            color: var(--text-muted);
            transition: transform var(--transition-fast), color var(--transition-fast);
            flex-shrink: 0;
            width: 24px;
            text-align: center;
        }

        .faq-item details[open] summary::after {
            content: '−';
            color: var(--accent-green-light);
        }

        .faq-item details summary:hover {
            background-color: rgba(94, 157, 111, 0.05);
        }

        .faq-item details .faq-answer {
            padding: 0 18px 16px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ========== Featured Articles ========== */
        .featured-grid {
            display: grid;
            gap: 20px;
            margin-top: 8px;
        }

        .featured-card {
            display: grid;
            grid-template-columns: 200px 1fr;
            gap: 20px;
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-med);
        }

        .featured-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(94, 157, 111, 0.35);
        }

        .featured-card .featured-image-link {
            display: block;
            aspect-ratio: 4/3;
            overflow: hidden;
            background-color: var(--bg-secondary);
            flex-shrink: 0;
        }

        .featured-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-med);
        }

        .featured-card:hover img {
            transform: scale(1.05);
        }

        .featured-card .featured-body {
            padding: 20px 20px 18px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .featured-card .featured-label {
            font-size: 11px;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-amber);
            margin-bottom: 6px;
        }

        .featured-card h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 8px;
        }

        .featured-card h3 a {
            color: var(--text-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .featured-card h3 a:hover {
            color: var(--accent-green-light);
        }

        .featured-card p {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0 0 10px;
        }

        .featured-card .featured-meta {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ========== Subscribe / CTA ========== */
        .subscribe-box {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            position: relative;
            box-shadow: var(--shadow-card);
        }

        .subscribe-box .subscribe-content {
            flex: 1;
            min-width: 240px;
        }

        .subscribe-box h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .subscribe-box p {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        .subscribe-box .subscribe-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            align-items: center;
        }

        .subscribe-box input[type="email"] {
            background-color: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 14px;
            color: var(--text-primary);
            min-width: 220px;
            transition: border-color var(--transition-fast);
        }

        .subscribe-box input[type="email"]::placeholder {
            color: var(--text-muted);
        }

        .subscribe-box input[type="email"]:focus {
            outline: none;
            border-color: var(--accent-green);
        }

        .close-chip {
            position: absolute;
            top: 12px;
            right: 12px;
            background: none;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            font-size: 11px;
            color: var(--text-muted);
            padding: 4px 10px;
            transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
            cursor: pointer;
        }

        .close-chip:hover {
            background-color: rgba(94, 157, 111, 0.1);
            color: var(--text-primary);
            border-color: var(--accent-green);
        }

        /* ========== Footer ========== */
        .site-footer {
            background-color: var(--sidebar-bg);
            border-top: 1px solid var(--sidebar-border);
            padding: 28px 0 20px;
            margin-top: 24px;
        }

        .footer-inner {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .footer-brand span:first-child {
            font-size: 20px;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 6px 16px;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 12.5px;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-green-light);
        }

        .copyright {
            font-size: 11.5px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-subtle);
            padding-top: 14px;
            line-height: 1.6;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 210px;
                --section-padding: 44px 0;
            }

            .container {
                padding-left: 22px;
                padding-right: 22px;
            }

            .section-title {
                font-size: 22px;
            }

            .category-header h1 {
                font-size: 28px;
            }

            .featured-card {
                grid-template-columns: 160px 1fr;
                gap: 16px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
                --section-padding: 36px 0;
            }

            .sidebar {
                display: none;
            }

            .mobile-header {
                display: flex;
            }

            .drawer-overlay {
                display: block;
            }

            .drawer-overlay.visible {
                pointer-events: auto;
            }

            .main-wrapper {
                margin-left: 0;
                padding-top: var(--mobile-header-height);
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .section-title {
                font-size: 20px;
            }

            .category-header {
                padding: 30px 0 28px;
            }

            .category-header h1 {
                font-size: 24px;
            }

            .category-header .category-desc {
                font-size: 13.5px;
            }

            .article-grid {
                grid-template-columns: 1fr;
            }

            .topic-grid {
                grid-template-columns: 1fr 1fr;
            }

            .data-grid {
                grid-template-columns: 1fr 1fr;
            }

            .featured-card {
                grid-template-columns: 1fr;
            }

            .featured-card .featured-image-link {
                aspect-ratio: 16/9;
            }

            .subscribe-box {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
                padding: 22px 18px;
            }

            .subscribe-box input[type="email"] {
                min-width: 0;
                width: 100%;
            }

            .footer-inner {
                flex-direction: column;
                gap: 14px;
            }
        }

        @media (max-width: 520px) {
            .topic-grid {
                grid-template-columns: 1fr;
            }

            .data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .data-block .data-number {
                font-size: 24px;
            }

            .article-card .card-body {
                padding: 14px 14px 12px;
            }

            .featured-card .featured-body {
                padding: 16px 14px 14px;
            }

            .btn {
                padding: 9px 16px;
                font-size: 13px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #14211d;
            --bg-secondary: #1b2b25;
            --bg-card: #1e332b;
            --bg-card-hover: #254236;
            --sidebar-bg: #0e1714;
            --sidebar-border: #223a30;
            --text-primary: #f0f3ee;
            --text-secondary: #c0cac2;
            --text-muted: #8da697;
            --accent-green: #5e9d6f;
            --accent-green-light: #7bbd8c;
            --accent-green-dark: #3e7352;
            --accent-amber: #d6a85c;
            --accent-amber-soft: #f0c47a;
            --border-subtle: rgba(94, 157, 111, 0.22);
            --border-card: rgba(94, 157, 111, 0.16);
            --shadow-card: 0 6px 24px rgba(0, 0, 0, 0.22);
            --shadow-card-hover: 0 14px 34px rgba(0, 0, 0, 0.36);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 22px;
            --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "Alibaba PuHuiTi", system-ui, -apple-system, sans-serif;
            --sidebar-width: 232px;
            --container-max: 1180px;
            --transition-fast: 0.18s ease;
            --transition-med: 0.28s ease;
            --section-padding: 56px 0;
            --section-gap: 20px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image: radial-gradient(circle at 18% 8%, rgba(94, 157, 111, 0.06), transparent 42%),
                radial-gradient(circle at 82% 28%, rgba(214, 168, 92, 0.05), transparent 36%);
            background-attachment: fixed;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            display: block;
            height: auto;
        }

        a {
            color: var(--accent-green-light);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-amber-soft);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-green);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 14px;
            color: var(--text-primary);
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 28px;
            padding-right: 28px;
        }

        /* 侧边栏导航 */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background-color: var(--sidebar-bg);
            border-right: 1px solid var(--sidebar-border);
            display: flex;
            flex-direction: column;
            padding: 24px 16px 16px;
            z-index: 1000;
            overflow-y: auto;
            transition: transform var(--transition-med);
        }

        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            padding: 4px 6px 16px;
            border-bottom: 1px solid var(--border-subtle);
            margin-bottom: 18px;
            text-decoration: none;
            flex-shrink: 0;
        }

        .sidebar-brand:hover {
            color: var(--accent-green-light);
        }

        .sidebar-brand .brand-icon {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(145deg, var(--accent-green-dark), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
            color: #f5f8f2;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }

        .sidebar-nav a {
            color: var(--text-muted);
            font-size: 13px;
            font-weight: 500;
            padding: 9px 12px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), color var(--transition-fast), border-left-color var(--transition-fast);
            border-left: 3px solid transparent;
            letter-spacing: 0.01em;
            text-decoration: none;
        }

        .sidebar-nav a:hover {
            background-color: rgba(94, 157, 111, 0.08);
            color: var(--text-primary);
        }

        .sidebar-nav a.active {
            background-color: rgba(94, 157, 111, 0.12);
            color: var(--accent-green-light);
            border-left-color: var(--accent-green);
            font-weight: 600;
        }

        .sidebar-footer {
            padding-top: 16px;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex-shrink: 0;
        }

        .sidebar-footer a {
            color: var(--text-muted);
            font-size: 12px;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .sidebar-footer a:hover {
            color: var(--text-primary);
        }

        /* 主内容区 */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        main {
            flex: 1;
            padding-bottom: 40px;
        }

        /* 移动端顶部栏 */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background-color: var(--sidebar-bg);
            border-bottom: 1px solid var(--sidebar-border);
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            z-index: 999;
        }

        .mobile-header .mobile-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
        }

        .mobile-header .mobile-brand span:first-child {
            font-size: 18px;
        }

        .hamburger {
            display: flex;
            flex-direction: column;
            gap: 4px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition-fast);
        }

        /* 抽屉遮罩 */
        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition-med);
        }

        .drawer-overlay.open {
            opacity: 1;
        }

        /* 板块通用样式 */
        section {
            padding: var(--section-padding);
        }

        .section-header {
            margin-bottom: 28px;
        }

        .section-header h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.01em;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 720px;
            line-height: 1.75;
        }

        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-green-light);
            background: rgba(94, 157, 111, 0.12);
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 0.03em;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        /* 分类页头 */
        .category-hero {
            position: relative;
            padding: 0;
            height: 300px;
            display: flex;
            align-items: flex-end;
            overflow: hidden;
            background-color: var(--bg-secondary);
            margin-bottom: 8px;
        }

        .category-hero .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center 40%;
            background-repeat: no-repeat;
            opacity: 0.45;
        }

        .category-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(14, 23, 20, 0.25) 0%, rgba(14, 23, 20, 0.88) 100%);
        }

        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            padding: 40px 28px 32px;
            max-width: var(--container-max);
            margin: 0 auto;
            width: 100%;
        }

        .category-hero h1 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 10px;
            letter-spacing: 0.01em;
        }

        .category-hero .hero-desc {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 680px;
            line-height: 1.75;
        }

        /* 列表卡片主体 */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
        }

        .article-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform var(--transition-med), box-shadow var(--transition-med), background var(--transition-med);
            cursor: pointer;
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            background-color: var(--bg-card-hover);
        }

        .article-card .card-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background-color: var(--bg-secondary);
        }

        .article-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-med);
        }

        .article-card:hover .card-img img {
            transform: scale(1.03);
        }

        .article-card .card-img .img-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(14, 23, 20, 0.78);
            color: var(--accent-green-light);
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
            letter-spacing: 0.03em;
            backdrop-filter: blur(4px);
        }

        .article-card .card-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
            margin-bottom: 8px;
        }

        .article-card .card-body .card-meta {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .article-card .card-body p {
            color: var(--text-secondary);
            font-size: 13.5px;
            line-height: 1.65;
            flex: 1;
            margin-bottom: 12px;
        }

        .article-card .card-body .read-more {
            font-size: 12.5px;
            font-weight: 600;
            color: var(--accent-green-light);
            align-self: flex-start;
            transition: color var(--transition-fast);
        }

        .article-card .card-body .read-more:hover {
            color: var(--accent-amber-soft);
        }

        .list-footer {
            display: flex;
            justify-content: flex-end;
            margin-top: 20px;
        }

        .list-footer a {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-green-light);
            padding: 8px 16px;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), color var(--transition-fast);
        }

        .list-footer a:hover {
            background: rgba(94, 157, 111, 0.1);
            color: var(--text-primary);
        }

        /* 扩展专题 */
        .topic-mini-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 16px;
        }

        .topic-mini-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 18px;
            transition: background var(--transition-fast), transform var(--transition-fast);
            cursor: pointer;
        }

        .topic-mini-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-2px);
        }

        .topic-mini-card .topic-icon {
            font-size: 22px;
            margin-bottom: 10px;
            display: block;
            color: var(--accent-green-light);
        }

        .topic-mini-card h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .topic-mini-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* 数据快照 */
        .data-snapshot-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 16px;
        }

        .snapshot-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 20px 18px;
            text-align: center;
            transition: background var(--transition-fast);
        }

        .snapshot-item:hover {
            background: var(--bg-card-hover);
        }

        .snapshot-item .snap-number {
            font-size: 2.1rem;
            font-weight: 700;
            color: var(--accent-green-light);
            line-height: 1.2;
            letter-spacing: 0.01em;
        }

        .snapshot-item .snap-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 6px;
            letter-spacing: 0.02em;
        }

        .snapshot-item .snap-desc {
            font-size: 12px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 860px;
        }

        .faq-item {
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            background: var(--bg-card);
            overflow: hidden;
            transition: background var(--transition-fast);
        }

        .faq-item:hover {
            background: var(--bg-card-hover);
        }

        .faq-item summary {
            padding: 16px 20px;
            font-weight: 600;
            font-size: 15px;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 10px;
            list-style: none;
            user-select: none;
            transition: color var(--transition-fast);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::before {
            content: "●";
            font-size: 8px;
            color: var(--accent-green);
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }

        .faq-item summary:hover {
            color: var(--accent-green-light);
        }

        .faq-item[open] summary::before {
            color: var(--accent-amber);
        }

        .faq-item .faq-content {
            padding: 0 20px 18px 38px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.75;
        }

        /* 精选文章 */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
        }

        .featured-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform var(--transition-med), box-shadow var(--transition-med);
            cursor: pointer;
        }

        .featured-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }

        .featured-card .featured-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background-color: var(--bg-secondary);
        }

        .featured-card .featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-med);
        }

        .featured-card:hover .featured-img img {
            transform: scale(1.04);
        }

        .featured-card .featured-body {
            padding: 18px 20px 20px;
        }

        .featured-card .featured-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
            margin-bottom: 8px;
        }

        .featured-card .featured-body .feat-meta {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .featured-card .featured-body p {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* 联系/入口板 */
        .cta-panel {
            background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .cta-panel .cta-text h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .cta-panel .cta-text p {
            color: var(--text-secondary);
            font-size: 14px;
            max-width: 520px;
            line-height: 1.7;
        }

        .cta-panel .cta-actions {
            display: flex;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.01em;
            transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--accent-green-dark);
            color: #f5f8f2;
            border: 1px solid var(--accent-green-dark);
        }

        .btn-primary:hover {
            background: var(--accent-green);
            border-color: var(--accent-green);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-secondary {
            background: transparent;
            color: var(--accent-green-light);
            border: 1px solid var(--border-subtle);
        }

        .btn-secondary:hover {
            background: rgba(94, 157, 111, 0.1);
            border-color: var(--accent-green-light);
            color: var(--text-primary);
        }

        /* 页脚 */
        .site-footer {
            background: var(--sidebar-bg);
            border-top: 1px solid var(--sidebar-border);
            padding: 28px 0 20px;
            margin-top: 20px;
        }

        .site-footer .footer-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 14px;
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .site-footer .footer-brand span:first-child {
            font-size: 18px;
        }

        .site-footer .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .site-footer .footer-links a {
            color: var(--text-muted);
            font-size: 12.5px;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .site-footer .footer-links a:hover {
            color: var(--text-primary);
        }

        .site-footer .copyright {
            color: var(--text-muted);
            font-size: 11.5px;
            padding-top: 12px;
            border-top: 1px solid var(--border-subtle);
            letter-spacing: 0.01em;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 210px;
                --section-padding: 44px 0;
            }
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .category-hero {
                height: 260px;
            }
            .category-hero h1 {
                font-size: 1.7rem;
            }
            section {
                padding: var(--section-padding);
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
                --section-padding: 36px 0;
            }

            .sidebar {
                transform: translateX(-100%);
                width: 260px;
                box-shadow: 4px 0 30px rgba(0, 0, 0, 0.4);
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .drawer-overlay {
                display: block;
            }

            .mobile-header {
                display: flex;
            }

            .main-wrapper {
                margin-left: 0;
                padding-top: 56px;
            }

            .category-hero {
                height: 220px;
            }

            .category-hero .hero-content {
                padding: 28px 20px 24px;
            }

            .category-hero h1 {
                font-size: 1.5rem;
            }

            .category-hero .hero-desc {
                font-size: 13.5px;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .section-header h2 {
                font-size: 1.3rem;
            }

            .article-grid {
                grid-template-columns: 1fr;
            }

            .topic-mini-grid {
                grid-template-columns: 1fr 1fr;
            }

            .data-snapshot-grid {
                grid-template-columns: 1fr 1fr;
            }

            .featured-grid {
                grid-template-columns: 1fr;
            }

            .cta-panel {
                flex-direction: column;
                align-items: flex-start;
            }

            .cta-panel .cta-actions {
                width: 100%;
                flex-wrap: wrap;
            }

            .btn {
                flex: 1;
                min-width: 120px;
            }

            .site-footer .footer-inner {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .topic-mini-grid {
                grid-template-columns: 1fr;
            }

            .data-snapshot-grid {
                grid-template-columns: 1fr 1fr;
            }

            .article-card .card-body h3 {
                font-size: 0.95rem;
            }

            .category-hero {
                height: 200px;
            }

            .category-hero h1 {
                font-size: 1.3rem;
            }
        }

/* roulang page: category3 */
:root {
      --bg-primary: #14211d;
      --bg-secondary: #1b2b25;
      --bg-card: #1e332b;
      --bg-card-hover: #254236;
      --sidebar-bg: #0e1714;
      --sidebar-border: #223a30;
      --text-primary: #f0f3ee;
      --text-secondary: #c0cac2;
      --text-muted: #8da697;
      --accent-green: #5e9d6f;
      --accent-green-light: #7bbd8c;
      --accent-green-dark: #3e7352;
      --accent-amber: #d6a85c;
      --accent-amber-soft: #f0c47a;
      --border-subtle: rgba(94, 157, 111, 0.22);
      --border-card: rgba(94, 157, 111, 0.16);
      --shadow-card: 0 6px 24px rgba(0, 0, 0, 0.22);
      --shadow-card-hover: 0 14px 34px rgba(0, 0, 0, 0.36);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-xl: 22px;
      --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "Alibaba PuHuiTi", system-ui, -apple-system, sans-serif;
      --sidebar-width: 232px;
      --container-max: 1180px;
      --transition-fast: 0.18s ease;
      --transition-med: 0.28s ease;
      --section-padding: 56px 0;
      --section-gap: 20px;
    }

    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      font-family: var(--font-sans);
      font-size: 15px;
      line-height: 1.75;
      color: var(--text-primary);
      background-color: var(--bg-primary);
      background-image: radial-gradient(circle at 18% 8%, rgba(94, 157, 111, 0.06), transparent 42%),
        radial-gradient(circle at 82% 28%, rgba(214, 168, 92, 0.05), transparent 36%);
      background-attachment: fixed;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      min-height: 100vh;
    }

    img {
      max-width: 100%;
      display: block;
      height: auto;
    }

    a {
      color: var(--accent-green-light);
      text-decoration: none;
      transition: color var(--transition-fast);
    }

    a:hover {
      color: var(--accent-amber-soft);
    }

    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    select:focus-visible,
    textarea:focus-visible {
      outline: 2px solid var(--accent-green);
      outline-offset: 3px;
      border-radius: 4px;
    }

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
      color: inherit;
    }

    input,
    select,
    textarea {
      font-family: inherit;
      font-size: 14px;
      color: var(--text-primary);
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding-left: 28px;
      padding-right: 28px;
    }

    /* ===== 左侧导航 ===== */
    .sidebar {
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      width: var(--sidebar-width);
      background-color: var(--sidebar-bg);
      border-right: 1px solid var(--sidebar-border);
      padding: 20px 14px 16px;
      display: flex;
      flex-direction: column;
      z-index: 100;
      overflow-y: auto;
    }

    .sidebar-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: 0.02em;
      padding: 4px 6px 16px;
      border-bottom: 1px solid var(--border-subtle);
      margin-bottom: 18px;
      text-decoration: none;
    }

    .sidebar-brand:hover {
      color: var(--accent-green-light);
    }

    .sidebar-brand .brand-icon {
      width: 34px;
      height: 34px;
      border-radius: 8px;
      background: linear-gradient(145deg, var(--accent-green-dark), var(--accent-green));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      flex-shrink: 0;
      color: #f5f8f2;
    }

    .sidebar-nav {
      display: flex;
      flex-direction: column;
      gap: 6px;
      flex: 1;
    }

    .sidebar-nav a {
      color: var(--text-muted);
      font-size: 13px;
      font-weight: 500;
      padding: 9px 12px;
      border-radius: var(--radius-sm);
      transition: background var(--transition-fast), color var(--transition-fast), border-left-color var(--transition-fast);
      border-left: 3px solid transparent;
      letter-spacing: 0.01em;
      text-decoration: none;
    }

    .sidebar-nav a:hover {
      background-color: rgba(94, 157, 111, 0.08);
      color: var(--text-primary);
    }

    .sidebar-nav a.active {
      background-color: rgba(94, 157, 111, 0.12);
      color: var(--accent-green-light);
      border-left-color: var(--accent-green);
      font-weight: 600;
    }

    .sidebar-footer {
      padding-top: 16px;
      border-top: 1px solid var(--border-subtle);
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .sidebar-footer a {
      color: var(--text-muted);
      font-size: 12px;
      text-decoration: none;
      transition: color var(--transition-fast);
    }

    .sidebar-footer a:hover {
      color: var(--text-primary);
    }

    .sidebar-search {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-subtle);
      background-color: rgba(0, 0, 0, 0.18);
      color: var(--text-muted);
      font-size: 12px;
    }

    .sidebar-search span {
      color: var(--text-muted);
      letter-spacing: 0.02em;
    }

    /* ===== 移动端顶部栏 ===== */
    .mobile-header {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 56px;
      background-color: var(--sidebar-bg);
      border-bottom: 1px solid var(--sidebar-border);
      z-index: 200;
      align-items: center;
      justify-content: space-between;
      padding: 0 16px;
    }

    .mobile-header .mobile-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 17px;
      font-weight: 700;
      color: var(--text-primary);
    }

    .mobile-header .mobile-logo .brand-icon {
      width: 28px;
      height: 28px;
      border-radius: 6px;
      background: linear-gradient(145deg, var(--accent-green-dark), var(--accent-green));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      color: #f5f8f2;
    }

    .hamburger {
      width: 38px;
      height: 38px;
      border-radius: 8px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 4px;
      background-color: rgba(94, 157, 111, 0.08);
      border: 1px solid var(--border-subtle);
      transition: background var(--transition-fast);
    }

    .hamburger:hover {
      background-color: rgba(94, 157, 111, 0.15);
    }

    .hamburger span {
      display: block;
      width: 18px;
      height: 2px;
      background-color: var(--text-primary);
      border-radius: 1px;
    }

    /* 抽屉 */
    .mobile-drawer {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      width: 280px;
      background-color: var(--sidebar-bg);
      border-right: 1px solid var(--sidebar-border);
      z-index: 300;
      padding: 20px 16px;
      transform: translateX(-100%);
      transition: transform var(--transition-med);
      flex-direction: column;
    }

    .mobile-drawer.open {
      transform: translateX(0);
    }

    .mobile-drawer .drawer-close {
      position: absolute;
      top: 14px;
      right: 14px;
      width: 32px;
      height: 32px;
      border-radius: 6px;
      background-color: rgba(94, 157, 111, 0.1);
      color: var(--text-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      border: 1px solid var(--border-subtle);
      transition: background var(--transition-fast);
    }

    .mobile-drawer .drawer-close:hover {
      background-color: rgba(94, 157, 111, 0.2);
    }

    .mobile-drawer .drawer-nav {
      display: flex;
      flex-direction: column;
      gap: 6px;
      margin-top: 40px;
    }

    .mobile-drawer .drawer-nav a {
      color: var(--text-muted);
      font-size: 14px;
      font-weight: 500;
      padding: 10px 12px;
      border-radius: var(--radius-sm);
      transition: background var(--transition-fast), color var(--transition-fast);
      text-decoration: none;
      border-left: 3px solid transparent;
    }

    .mobile-drawer .drawer-nav a:hover {
      background-color: rgba(94, 157, 111, 0.08);
      color: var(--text-primary);
    }

    .mobile-drawer .drawer-nav a.active {
      background-color: rgba(94, 157, 111, 0.12);
      color: var(--accent-green-light);
      border-left-color: var(--accent-green);
      font-weight: 600;
    }

    .drawer-overlay {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-color: rgba(0, 0, 0, 0.5);
      z-index: 250;
      opacity: 0;
      transition: opacity var(--transition-med);
    }

    .drawer-overlay.show {
      opacity: 1;
    }

    /* ===== 主内容区 ===== */
    .main-content {
      margin-left: var(--sidebar-width);
      padding-bottom: 40px;
    }

    .section {
      padding: var(--section-padding);
    }

    .section-alt {
      background-color: var(--bg-secondary);
    }

    .section-title {
      font-size: 24px;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: 0.01em;
      margin-bottom: 12px;
      line-height: 1.4;
    }

    .section-subtitle {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.75;
      margin-bottom: 28px;
      max-width: 720px;
    }

    .divider {
      width: 48px;
      height: 3px;
      border-radius: 2px;
      background-color: var(--accent-green);
      margin-bottom: 20px;
    }

    /* ===== 分类页头 ===== */
    .category-header {
      position: relative;
      min-height: 260px;
      display: flex;
      align-items: flex-end;
      padding: 48px 0 40px;
      overflow: hidden;
      background-color: var(--bg-secondary);
    }

    .category-header-bg {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.35;
      pointer-events: none;
    }

    .category-header-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(20, 33, 29, 0.55) 0%, rgba(20, 33, 29, 0.78) 40%, rgba(20, 33, 29, 0.92) 100%);
      pointer-events: none;
    }

    .category-header .container {
      position: relative;
      z-index: 1;
    }

    .category-header h1 {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: 0.02em;
      line-height: 1.3;
      margin-bottom: 12px;
    }

    .category-header .category-desc {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.75;
      max-width: 680px;
    }

    /* ===== 文章卡片列表 ===== */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .article-card {
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: transform var(--transition-med), box-shadow var(--transition-med), background var(--transition-med);
    }

    .article-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-card-hover);
      background: var(--bg-card-hover);
    }

    .article-card .card-img {
      width: 100%;
      aspect-ratio: 16 / 9;
      object-fit: cover;
      display: block;
    }

    .article-card .card-body {
      padding: 18px 20px 20px;
    }

    .article-card .card-date {
      font-size: 12px;
      color: var(--text-muted);
      letter-spacing: 0.02em;
      margin-bottom: 8px;
    }

    .article-card h3 {
      font-size: 17px;
      font-weight: 600;
      color: var(--text-primary);
      line-height: 1.5;
      margin-bottom: 8px;
      letter-spacing: 0.01em;
    }

    .article-card p {
      font-size: 13.5px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    .read-more-text {
      display: inline-block;
      font-size: 13px;
      color: var(--accent-green-light);
      margin-top: 10px;
      font-weight: 500;
      letter-spacing: 0.01em;
      transition: color var(--transition-fast);
    }

    .article-card:hover .read-more-text {
      color: var(--accent-amber-soft);
    }

    .view-more-wrap {
      display: flex;
      justify-content: flex-end;
      margin-top: 24px;
    }

    .view-more-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 500;
      color: var(--accent-green-light);
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-subtle);
      transition: background var(--transition-fast), color var(--transition-fast);
    }

    .view-more-link:hover {
      background-color: rgba(94, 157, 111, 0.1);
      color: var(--accent-amber-soft);
    }

    /* ===== 扩展专题 ===== */
    .topics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .topic-card {
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 22px 18px;
      transition: transform var(--transition-med), background var(--transition-med), box-shadow var(--transition-med);
    }

    .topic-card:hover {
      transform: translateY(-2px);
      background: var(--bg-card-hover);
      box-shadow: var(--shadow-card);
    }

    .topic-icon {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: rgba(94, 157, 111, 0.14);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      color: var(--accent-green-light);
      margin-bottom: 14px;
    }

    .topic-card h3 {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-primary);
      line-height: 1.5;
      margin-bottom: 8px;
    }

    .topic-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* ===== 数据快照 ===== */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .stat-item {
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      transition: background var(--transition-med);
    }

    .stat-item:hover {
      background: var(--bg-card-hover);
    }

    .stat-value {
      font-size: 32px;
      font-weight: 700;
      color: var(--accent-amber-soft);
      letter-spacing: 0.02em;
      line-height: 1.2;
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-secondary);
      letter-spacing: 0.01em;
    }

    /* ===== FAQ ===== */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color var(--transition-fast);
    }

    .faq-item:hover {
      border-color: rgba(94, 157, 111, 0.35);
    }

    .faq-item summary {
      list-style: none;
      cursor: pointer;
      padding: 16px 20px;
      font-size: 14.5px;
      font-weight: 500;
      color: var(--text-primary);
      display: flex;
      align-items: center;
      gap: 10px;
      letter-spacing: 0.01em;
      transition: background var(--transition-fast);
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::before {
      content: "▸";
      flex-shrink: 0;
      font-size: 16px;
      color: var(--accent-green);
      transition: transform var(--transition-fast);
    }

    .faq-item[open] summary::before {
      transform: rotate(90deg);
      color: var(--accent-amber-soft);
    }

    .faq-item summary:hover {
      background-color: rgba(94, 157, 111, 0.06);
    }

    .faq-answer {
      padding: 0 20px 18px 46px;
      font-size: 13.5px;
      color: var(--text-secondary);
      line-height: 1.75;
    }

    /* ===== 精选文章 ===== */
    .featured-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .featured-item {
      display: flex;
      gap: 20px;
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-lg);
      padding: 18px;
      transition: transform var(--transition-med), box-shadow var(--transition-med), background var(--transition-med);
    }

    .featured-item:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-card);
      background: var(--bg-card-hover);
    }

    .featured-img {
      width: 180px;
      flex-shrink: 0;
      aspect-ratio: 16 / 9;
      object-fit: cover;
      border-radius: var(--radius-md);
    }

    .featured-body {
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .featured-body h3 {
      font-size: 17px;
      font-weight: 600;
      color: var(--text-primary);
      line-height: 1.5;
      margin-bottom: 6px;
      letter-spacing: 0.01em;
    }

    .featured-body p {
      font-size: 13.5px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    /* ===== 联系/订阅 ===== */
    .contact-panel {
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      align-items: center;
      justify-content: space-between;
    }

    .contact-info h2 {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 8px;
      letter-spacing: 0.01em;
    }

    .contact-info p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      max-width: 480px;
    }

    .subscribe-form {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      align-items: center;
    }

    .subscribe-form input {
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-subtle);
      background-color: rgba(0, 0, 0, 0.2);
      color: var(--text-primary);
      font-size: 14px;
      min-width: 220px;
      transition: border-color var(--transition-fast);
    }

    .subscribe-form input::placeholder {
      color: var(--text-muted);
    }

    .subscribe-form input:focus {
      border-color: var(--accent-green);
      outline: none;
    }

    .btn-primary {
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      background-color: var(--accent-green);
      color: #f5f8f2;
      font-size: 14px;
      font-weight: 600;
      letter-spacing: 0.01em;
      border: none;
      cursor: pointer;
      transition: background var(--transition-fast), transform var(--transition-fast);
    }

    .btn-primary:hover {
      background-color: var(--accent-green-light);
      transform: translateY(-1px);
    }

    .btn-primary:active {
      transform: translateY(0);
    }

    .btn-ghost {
      padding: 9px 16px;
      border-radius: var(--radius-sm);
      background-color: transparent;
      color: var(--text-secondary);
      font-size: 13px;
      font-weight: 500;
      border: 1px solid var(--border-subtle);
      cursor: pointer;
      transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
    }

    .btn-ghost:hover {
      background-color: rgba(94, 157, 111, 0.08);
      color: var(--text-primary);
      border-color: rgba(94, 157, 111, 0.3);
    }

    /* ===== 页脚 ===== */
    .site-footer {
      background-color: var(--sidebar-bg);
      border-top: 1px solid var(--sidebar-border);
      padding: 32px 0 24px;
      margin-top: 20px;
    }

    .site-footer .container {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .footer-inner {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      align-items: center;
      justify-content: space-between;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-primary);
    }

    .footer-brand span {
      letter-spacing: 0.02em;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .footer-links a {
      color: var(--text-muted);
      font-size: 12px;
      text-decoration: none;
      transition: color var(--transition-fast);
    }

    .footer-links a:hover {
      color: var(--text-primary);
    }

    .copyright {
      font-size: 12px;
      color: var(--text-muted);
      letter-spacing: 0.01em;
      padding-top: 16px;
      border-top: 1px solid var(--border-subtle);
    }

    /* ===== 响应式断点 ===== */
    @media (max-width: 1024px) {
      :root {
        --sidebar-width: 210px;
        --section-padding: 44px 0;
      }
      .container {
        padding-left: 22px;
        padding-right: 22px;
      }
      .articles-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }
      .topics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
      }
      .featured-item {
        flex-direction: column;
      }
      .featured-img {
        width: 100%;
        aspect-ratio: 16 / 9;
      }
    }

    @media (max-width: 768px) {
      :root {
        --section-padding: 36px 0;
        --sidebar-width: 0px;
      }
      .sidebar {
        display: none;
      }
      .mobile-header {
        display: flex;
      }
      .mobile-drawer {
        display: flex;
      }
      .drawer-overlay {
        display: block;
      }
      .main-content {
        margin-left: 0;
        padding-top: 56px;
      }
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
      .category-header {
        min-height: 200px;
        padding: 36px 0 28px;
      }
      .category-header h1 {
        font-size: 24px;
      }
      .category-header .category-desc {
        font-size: 13.5px;
      }
      .section-title {
        font-size: 20px;
      }
      .articles-grid {
        grid-template-columns: 1fr;
        gap: 14px;
      }
      .topics-grid {
        grid-template-columns: 1fr;
        gap: 12px;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
      }
      .stat-value {
        font-size: 26px;
      }
      .contact-panel {
        flex-direction: column;
        align-items: flex-start;
        padding: 24px 20px;
      }
      .subscribe-form {
        width: 100%;
      }
      .subscribe-form input {
        flex: 1;
        min-width: 0;
      }
      .featured-item {
        padding: 14px;
      }
      .footer-inner {
        flex-direction: column;
        align-items: flex-start;
      }
    }

    @media (max-width: 520px) {
      .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
      }
      .stat-value {
        font-size: 22px;
      }
      .stat-label {
        font-size: 11px;
      }
      .subscribe-form {
        flex-direction: column;
        align-items: stretch;
      }
      .subscribe-form input {
        min-width: 100%;
      }
      .btn-primary {
        width: 100%;
        text-align: center;
      }
      .category-header h1 {
        font-size: 21px;
      }
      .article-card h3 {
        font-size: 15px;
      }
      .featured-body h3 {
        font-size: 15px;
      }
    }

/* roulang page: category5 */
:root {
            --bg-primary: #14211d;
            --bg-secondary: #1b2b25;
            --bg-card: #1e332b;
            --bg-card-hover: #254236;
            --sidebar-bg: #0e1714;
            --sidebar-border: #223a30;
            --text-primary: #f0f3ee;
            --text-secondary: #c0cac2;
            --text-muted: #8da697;
            --accent-green: #5e9d6f;
            --accent-green-light: #7bbd8c;
            --accent-green-dark: #3e7352;
            --accent-amber: #d6a85c;
            --accent-amber-soft: #f0c47a;
            --border-subtle: rgba(94, 157, 111, 0.22);
            --border-card: rgba(94, 157, 111, 0.16);
            --shadow-card: 0 6px 24px rgba(0, 0, 0, 0.22);
            --shadow-card-hover: 0 14px 34px rgba(0, 0, 0, 0.36);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 22px;
            --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "Alibaba PuHuiTi", system-ui, -apple-system, sans-serif;
            --sidebar-width: 232px;
            --container-max: 1180px;
            --transition-fast: 0.18s ease;
            --transition-med: 0.28s ease;
            --section-padding: 56px 0;
            --section-gap: 20px;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image: radial-gradient(circle at 18% 8%, rgba(94, 157, 111, 0.06), transparent 42%),
                radial-gradient(circle at 82% 28%, rgba(214, 168, 92, 0.05), transparent 36%);
            background-attachment: fixed;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            display: block;
            height: auto;
        }

        a {
            color: var(--accent-green-light);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-amber-soft);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-green);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        input,
        textarea {
            font-family: inherit;
            font-size: 14px;
            color: var(--text-primary);
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 28px;
            padding-right: 28px;
        }

        /* ========== 左侧 App Shell 导航 ========== */
        .sidebar {
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background-color: var(--sidebar-bg);
            border-right: 1px solid var(--sidebar-border);
            display: flex;
            flex-direction: column;
            padding: 20px 16px 18px;
            z-index: 1000;
            overflow-y: auto;
            transition: transform var(--transition-med);
        }

        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            padding: 4px 6px 16px;
            border-bottom: 1px solid var(--border-subtle);
            margin-bottom: 18px;
            text-decoration: none;
            flex-shrink: 0;
        }

        .sidebar-brand:hover {
            color: var(--accent-green-light);
        }

        .sidebar-brand .brand-icon {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(145deg, var(--accent-green-dark), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
            color: #f5f8f2;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }

        .sidebar-nav a {
            color: var(--text-muted);
            font-size: 13px;
            font-weight: 500;
            padding: 9px 12px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), color var(--transition-fast), border-left-color var(--transition-fast);
            border-left: 3px solid transparent;
            letter-spacing: 0.01em;
            text-decoration: none;
            display: block;
        }

        .sidebar-nav a:hover {
            background-color: rgba(94, 157, 111, 0.08);
            color: var(--text-primary);
        }

        .sidebar-nav a.active {
            background-color: rgba(94, 157, 111, 0.12);
            color: var(--accent-green-light);
            border-left-color: var(--accent-green);
            font-weight: 600;
        }

        .sidebar-footer {
            padding-top: 16px;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex-shrink: 0;
        }

        .sidebar-footer a {
            color: var(--text-muted);
            font-size: 12px;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .sidebar-footer a:hover {
            color: var(--text-primary);
        }

        .sidebar-search {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 7px 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-card);
            background-color: rgba(0, 0, 0, 0.18);
            color: var(--text-muted);
            font-size: 12px;
        }

        .sidebar-search .search-icon {
            flex-shrink: 0;
            opacity: 0.7;
        }

        /* ========== 主内容区域 ========== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .site-main {
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        /* ========== 移动端顶部栏 ========== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background-color: var(--sidebar-bg);
            border-bottom: 1px solid var(--sidebar-border);
            z-index: 999;
            align-items: center;
            padding: 0 16px;
            gap: 12px;
        }

        .mobile-header .brand-icon {
            width: 30px;
            height: 30px;
            border-radius: 7px;
            background: linear-gradient(145deg, var(--accent-green-dark), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: #f5f8f2;
            flex-shrink: 0;
        }

        .mobile-header .mobile-brand {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
        }

        .mobile-header .hamburger {
            margin-left: auto;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: transparent;
            border: 1px solid var(--border-card);
            color: var(--text-primary);
            font-size: 18px;
            transition: background var(--transition-fast);
            cursor: pointer;
        }

        .mobile-header .hamburger:hover {
            background-color: rgba(94, 157, 111, 0.08);
        }

        .mobile-header .hamburger[aria-expanded="true"] {
            background-color: rgba(94, 157, 111, 0.12);
            border-color: var(--border-subtle);
        }

        /* 移动端抽屉遮罩 */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.52);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition-med);
        }

        .sidebar-overlay.show {
            opacity: 1;
        }

        /* ========== 分类页头 ========== */
        .category-header {
            position: relative;
            min-height: 260px;
            display: flex;
            align-items: center;
            background-color: var(--bg-secondary);
            background-image: url('/assets/images/1cff573a8acc039d.webp');
            background-size: cover;
            background-position: center 30%;
            border-bottom: 1px solid var(--border-subtle);
            overflow: hidden;
        }

        .category-header::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(14, 23, 20, 0.72) 0%, rgba(20, 33, 29, 0.82) 55%, rgba(20, 33, 29, 0.92) 100%);
            z-index: 1;
        }

        .category-header .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .category-header-content {
            max-width: 720px;
            padding: 40px 0 36px;
        }

        .category-header .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-amber-soft);
            background: rgba(214, 168, 92, 0.12);
            padding: 5px 12px;
            border-radius: 999px;
            margin-bottom: 14px;
            border: 1px solid rgba(214, 168, 92, 0.25);
        }

        .category-header h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            letter-spacing: 0.01em;
            margin-bottom: 12px;
        }

        .category-header .category-desc {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0;
        }

        /* ========== Section 通用样式 ========== */
        .page-section {
            padding: var(--section-padding);
        }

        .page-section.section-alt {
            background-color: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .section-heading {
            margin-bottom: 28px;
        }

        .section-heading h2 {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-primary);
            letter-spacing: 0.01em;
        }

        .section-heading p {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 8px;
            max-width: 640px;
        }

        .section-heading .heading-accent {
            display: inline-block;
            width: 32px;
            height: 3px;
            background-color: var(--accent-green);
            border-radius: 2px;
            margin-bottom: 10px;
        }

        /* ========== 列表/卡片主体 ========== */
        .article-list-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }

        .article-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-med);
            box-shadow: var(--shadow-card);
            cursor: pointer;
        }

        .article-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-subtle);
            background-color: var(--bg-card-hover);
        }

        .article-card .card-image {
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
            flex-shrink: 0;
        }

        .article-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .article-card:hover .card-image img {
            transform: scale(1.03);
        }

        .article-card .card-image .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(14, 23, 20, 0.82);
            color: var(--accent-amber-soft);
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 999px;
            letter-spacing: 0.04em;
            border: 1px solid rgba(214, 168, 92, 0.3);
        }

        .article-card .card-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-card .card-title {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--text-primary);
            margin-bottom: 8px;
            transition: color var(--transition-fast);
        }

        .article-card:hover .card-title {
            color: var(--accent-green-light);
        }

        .article-card .card-meta {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .article-card .card-summary {
            font-size: 13px;
            line-height: 1.7;
            color: var(--text-secondary);
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card .card-footer {
            margin-top: 12px;
            padding-top: 12px;
            border-top: 1px solid var(--border-card);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--text-muted);
        }

        .article-card .read-more {
            color: var(--accent-green-light);
            font-weight: 500;
            font-size: 12px;
            transition: color var(--transition-fast);
        }

        .article-card:hover .read-more {
            color: var(--accent-amber-soft);
        }

        .list-more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 24px;
            margin-left: auto;
            color: var(--accent-green-light);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 16px;
            border: 1px solid var(--border-card);
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
            text-decoration: none;
        }

        .list-more-link:hover {
            background-color: rgba(94, 157, 111, 0.1);
            border-color: var(--border-subtle);
            color: var(--accent-amber-soft);
        }

        .list-more-wrapper {
            display: flex;
            justify-content: flex-end;
        }

        /* ========== 扩展专题 ========== */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .topic-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-med);
            box-shadow: var(--shadow-card);
        }

        .topic-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-subtle);
            background-color: var(--bg-card-hover);
        }

        .topic-card .topic-icon {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background-color: rgba(94, 157, 111, 0.14);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
            color: var(--accent-green-light);
        }

        .topic-card .topic-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .topic-card .topic-desc {
            font-size: 12px;
            line-height: 1.65;
            color: var(--text-muted);
        }

        /* ========== 数据快照 ========== */
        .data-snapshot-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 14px;
        }

        .data-snapshot-item {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            text-align: center;
            transition: border-color var(--transition-fast), background var(--transition-fast);
            box-shadow: var(--shadow-card);
        }

        .data-snapshot-item:hover {
            border-color: var(--border-subtle);
            background-color: var(--bg-card-hover);
        }

        .data-snapshot-item .snapshot-value {
            font-size: 26px;
            font-weight: 700;
            color: var(--accent-amber-soft);
            letter-spacing: -0.01em;
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .data-snapshot-item .snapshot-label {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 860px;
        }

        .faq-item {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast), background var(--transition-fast);
            box-shadow: var(--shadow-card);
        }

        .faq-item:hover {
            border-color: var(--border-subtle);
        }

        .faq-item summary {
            list-style: none;
            cursor: pointer;
            padding: 16px 18px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
            user-select: none;
            transition: background var(--transition-fast);
            position: relative;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::before {
            content: '';
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background-color: var(--accent-green);
            flex-shrink: 0;
        }

        .faq-item summary::after {
            content: '+';
            margin-left: auto;
            font-size: 18px;
            color: var(--text-muted);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }

        .faq-item[open] summary::after {
            transform: rotate(45deg);
            color: var(--accent-green-light);
        }

        .faq-item summary:hover {
            background-color: rgba(94, 157, 111, 0.05);
        }

        .faq-item .faq-answer {
            padding: 0 18px 16px 33px;
            font-size: 13px;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        /* ========== 精选文章 ========== */
        .featured-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
        }

        .featured-card {
            display: flex;
            gap: 14px;
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-med);
            box-shadow: var(--shadow-card);
        }

        .featured-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-subtle);
            background-color: var(--bg-card-hover);
        }

        .featured-card .featured-image {
            width: 38%;
            flex-shrink: 0;
            min-height: 140px;
        }

        .featured-card .featured-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .featured-card .featured-body {
            padding: 14px 16px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .featured-card .featured-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 6px;
            transition: color var(--transition-fast);
        }

        .featured-card:hover .featured-title {
            color: var(--accent-green-light);
        }

        .featured-card .featured-desc {
            font-size: 12px;
            line-height: 1.65;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ========== 联系/订阅框 ========== */
        .contact-box {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            display: flex;
            align-items: center;
            gap: 24px;
            box-shadow: var(--shadow-card);
            position: relative;
        }

        .contact-box .close-btn {
            position: absolute;
            top: 14px;
            right: 14px;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background-color: rgba(0, 0, 0, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--text-muted);
            transition: background var(--transition-fast), color var(--transition-fast);
            cursor: pointer;
            border: none;
        }

        .contact-box .close-btn:hover {
            background-color: rgba(0, 0, 0, 0.35);
            color: var(--text-primary);
        }

        .contact-box .contact-text {
            flex: 1;
        }

        .contact-box .contact-text h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .contact-box .contact-text p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        .contact-box .subscribe-form {
            display: flex;
            gap: 10px;
            flex-shrink: 0;
        }

        .contact-box .subscribe-form input {
            width: 220px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-card);
            background-color: rgba(0, 0, 0, 0.2);
            color: var(--text-primary);
            font-size: 13px;
            transition: border-color var(--transition-fast);
        }

        .contact-box .subscribe-form input::placeholder {
            color: var(--text-muted);
        }

        .contact-box .subscribe-form input:focus {
            border-color: var(--accent-green);
            outline: none;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            background-color: var(--accent-green-dark);
            color: #f5f8f2;
            font-size: 13px;
            font-weight: 600;
            transition: background var(--transition-fast), transform var(--transition-fast);
            cursor: pointer;
            border: 1px solid rgba(94, 157, 111, 0.4);
            white-space: nowrap;
        }

        .btn-primary:hover {
            background-color: var(--accent-green);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background-color: var(--sidebar-bg);
            border-top: 1px solid var(--sidebar-border);
            padding: 28px 0 22px;
            margin-top: auto;
        }

        .site-footer .footer-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 14px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .footer-brand span:first-child {
            font-size: 18px;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 12px;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--text-primary);
        }

        .copyright {
            font-size: 11px;
            color: var(--text-muted);
            letter-spacing: 0.02em;
            padding-top: 12px;
            border-top: 1px solid var(--border-subtle);
        }

        /* ========== 响应式断点 ========== */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 210px;
                --section-padding: 44px 0;
            }

            .article-list-grid {
                grid-template-columns: 1fr;
            }

            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .data-snapshot-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .category-header h1 {
                font-size: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
                --section-padding: 36px 0;
            }

            .sidebar {
                transform: translateX(-100%);
                width: 232px;
                box-shadow: 4px 0 30px rgba(0, 0, 0, 0.45);
            }

            .sidebar.mobile-open {
                transform: translateX(0);
            }

            .sidebar-overlay.show {
                display: block;
            }

            .mobile-header {
                display: flex;
            }

            .main-wrapper {
                margin-left: 0;
                padding-top: 56px;
            }

            .category-header {
                min-height: 210px;
            }

            .category-header-content {
                padding: 28px 0 24px;
            }

            .category-header h1 {
                font-size: 24px;
            }

            .category-header .category-desc {
                font-size: 13px;
            }

            .article-list-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .topic-grid {
                grid-template-columns: 1fr;
            }

            .data-snapshot-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .data-snapshot-item .snapshot-value {
                font-size: 22px;
            }

            .featured-grid {
                grid-template-columns: 1fr;
            }

            .featured-card {
                flex-direction: column;
            }

            .featured-card .featured-image {
                width: 100%;
                aspect-ratio: 16/9;
                min-height: auto;
            }

            .contact-box {
                flex-direction: column;
                align-items: stretch;
                text-align: left;
                padding: 22px 18px;
            }

            .contact-box .subscribe-form {
                flex-direction: column;
                width: 100%;
            }

            .contact-box .subscribe-form input {
                width: 100%;
            }

            .contact-box .subscribe-form .btn-primary {
                justify-content: center;
                width: 100%;
            }

            .section-heading h2 {
                font-size: 20px;
            }

            .footer-inner {
                flex-direction: column;
                align-items: flex-start;
            }

            .footer-links {
                gap: 10px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .category-header {
                min-height: 180px;
            }

            .category-header h1 {
                font-size: 21px;
            }

            .category-header .category-desc {
                font-size: 12px;
                line-height: 1.7;
            }

            .data-snapshot-grid {
                grid-template-columns: 1fr 1fr;
            }

            .data-snapshot-item .snapshot-value {
                font-size: 19px;
            }

            .data-snapshot-item .snapshot-label {
                font-size: 11px;
            }

            .article-card .card-title {
                font-size: 14px;
            }

            .section-heading h2 {
                font-size: 18px;
            }

            .faq-item summary {
                font-size: 13px;
                padding: 14px 14px;
            }

            .faq-item .faq-answer {
                padding: 0 14px 14px 28px;
                font-size: 12px;
            }
        }

/* roulang page: category6 */
:root {
            --bg-primary: #14211d;
            --bg-secondary: #1b2b25;
            --bg-card: #1e332b;
            --bg-card-hover: #254236;
            --sidebar-bg: #0e1714;
            --sidebar-border: #223a30;
            --text-primary: #f0f3ee;
            --text-secondary: #c0cac2;
            --text-muted: #8da697;
            --accent-green: #5e9d6f;
            --accent-green-light: #7bbd8c;
            --accent-green-dark: #3e7352;
            --accent-amber: #d6a85c;
            --accent-amber-soft: #f0c47a;
            --border-subtle: rgba(94, 157, 111, 0.22);
            --border-card: rgba(94, 157, 111, 0.16);
            --shadow-card: 0 6px 24px rgba(0, 0, 0, 0.22);
            --shadow-card-hover: 0 14px 34px rgba(0, 0, 0, 0.36);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 22px;
            --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "Alibaba PuHuiTi", system-ui, -apple-system, sans-serif;
            --sidebar-width: 232px;
            --container-max: 1180px;
            --transition-fast: 0.18s ease;
            --transition-med: 0.28s ease;
            --section-padding: 56px 0;
            --section-gap: 20px;
        }
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 210px;
                --section-padding: 44px 0;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-padding: 36px 0;
                --sidebar-width: 0px;
            }
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image: radial-gradient(circle at 18% 8%, rgba(94, 157, 111, 0.06), transparent 42%),
                radial-gradient(circle at 82% 28%, rgba(214, 168, 92, 0.05), transparent 36%);
            background-attachment: fixed;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            display: block;
            height: auto;
        }

        a {
            color: var(--accent-green-light);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-amber-soft);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-green);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 14px;
            color: var(--text-primary);
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 28px;
            padding-right: 28px;
        }

        /* ===== Sidebar Navigation ===== */
        .sidebar {
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background-color: var(--sidebar-bg);
            border-right: 1px solid var(--sidebar-border);
            display: flex;
            flex-direction: column;
            padding: 20px 14px;
            z-index: 1000;
            overflow-y: auto;
            transition: transform var(--transition-med);
        }
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            padding: 4px 6px 16px;
            border-bottom: 1px solid var(--border-subtle);
            margin-bottom: 18px;
            text-decoration: none;
        }
        .sidebar-brand:hover {
            color: var(--accent-green-light);
        }
        .sidebar-brand .brand-icon {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(145deg, var(--accent-green-dark), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
            color: #f5f8f2;
        }
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }
        .sidebar-nav a {
            color: var(--text-muted);
            font-size: 13px;
            font-weight: 500;
            padding: 9px 12px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), color var(--transition-fast), border-left-color var(--transition-fast);
            border-left: 3px solid transparent;
            letter-spacing: 0.01em;
            text-decoration: none;
        }
        .sidebar-nav a:hover {
            background-color: rgba(94, 157, 111, 0.08);
            color: var(--text-primary);
        }
        .sidebar-nav a.active {
            background-color: rgba(94, 157, 111, 0.12);
            color: var(--accent-green-light);
            border-left-color: var(--accent-green);
            font-weight: 600;
        }
        .sidebar-footer {
            padding-top: 16px;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .sidebar-footer a {
            color: var(--text-muted);
            font-size: 12px;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .sidebar-footer a:hover {
            color: var(--text-primary);
        }
        .sidebar-search {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 7px 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-subtle);
            color: var(--text-muted);
            font-size: 12px;
            margin-bottom: 10px;
            transition: border-color var(--transition-fast);
        }
        .sidebar-search:hover {
            border-color: var(--accent-green);
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background-color: var(--sidebar-bg);
            border-bottom: 1px solid var(--sidebar-border);
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            z-index: 1001;
        }
        .mobile-header .mobile-brand {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-header .mobile-brand .brand-icon {
            width: 28px;
            height: 28px;
            border-radius: 6px;
            background: linear-gradient(145deg, var(--accent-green-dark), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: #f5f8f2;
        }
        .hamburger-btn {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border: 1px solid var(--border-subtle);
            transition: background var(--transition-fast);
        }
        .hamburger-btn:hover {
            background-color: rgba(94, 157, 111, 0.1);
        }
        .hamburger-btn span {
            display: block;
            width: 20px;
            height: 2px;
            background-color: var(--text-secondary);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }
        .mobile-drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background-color: rgba(0, 0, 0, 0.55);
            z-index: 1002;
            opacity: 0;
            transition: opacity var(--transition-med);
        }
        .mobile-drawer-overlay.open {
            opacity: 1;
        }

        /* ===== Main Layout ===== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .main-content {
            flex: 1;
            padding-top: 0;
        }

        /* ===== Section Base ===== */
        section {
            padding: var(--section-padding);
            border-bottom: 1px solid var(--border-subtle);
        }
        section:last-of-type {
            border-bottom: none;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-amber);
            margin-bottom: 10px;
        }
        .section-label::before {
            content: '';
            width: 16px;
            height: 2px;
            background-color: var(--accent-amber);
            border-radius: 2px;
        }
        .section-title {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            margin-bottom: 12px;
        }
        .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.85;
            margin-bottom: 24px;
        }

        /* ===== Category Page Header (Compact, non-Hero) ===== */
        .category-header {
            position: relative;
            padding: 48px 0 40px;
            background-image: url('/assets/images/c089ba5be5bcdb74.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--border-subtle);
            min-height: 280px;
            display: flex;
            align-items: flex-end;
        }
        .category-header::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(14, 23, 20, 0.55) 0%, rgba(14, 23, 20, 0.85) 55%, rgba(20, 33, 29, 0.98) 100%);
        }
        .category-header .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }
        .category-header .breadcrumb {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .category-header .breadcrumb a {
            color: var(--accent-green-light);
        }
        .category-header .breadcrumb span {
            color: var(--text-muted);
        }
        .category-header h1 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            margin-bottom: 10px;
            line-height: 1.3;
        }
        .category-header .header-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 620px;
            line-height: 1.85;
        }
        .category-header .header-progress-row {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 18px;
            flex-wrap: wrap;
        }
        .category-header .progress-track {
            flex: 1;
            min-width: 180px;
            max-width: 320px;
            height: 6px;
            background-color: rgba(94, 157, 111, 0.18);
            border-radius: 99px;
            overflow: hidden;
        }
        .category-header .progress-fill {
            height: 100%;
            width: 72%;
            background: linear-gradient(90deg, var(--accent-green-dark), var(--accent-green-light));
            border-radius: 99px;
        }
        .category-header .progress-label {
            font-size: 12px;
            color: var(--text-muted);
        }
        .category-header .header-invite-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 20px;
            background-color: var(--accent-green);
            color: #f5f8f2;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.01em;
            transition: background var(--transition-fast);
        }
        .category-header .header-invite-btn:hover {
            background-color: var(--accent-green-light);
            color: #f5f8f2;
        }

        /* ===== Article List Section ===== */
        .article-list-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .article-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-fast);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-subtle);
        }
        .article-card .card-cover {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background-color: var(--bg-secondary);
            position: relative;
        }
        .article-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-med);
        }
        .article-card:hover .card-cover img {
            transform: scale(1.03);
        }
        .article-card .card-cover .cover-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background-color: rgba(14, 23, 20, 0.78);
            color: var(--accent-amber-soft);
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 99px;
            letter-spacing: 0.02em;
        }
        .article-card .card-body {
            padding: 18px 20px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .article-card .card-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .article-card .card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.45;
            letter-spacing: -0.005em;
        }
        .article-card .card-summary {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.75;
            flex: 1;
        }
        .article-card .card-read-more {
            display: inline-block;
            margin-top: 14px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-green-light);
        }
        .article-card .card-read-more:hover {
            color: var(--accent-amber-soft);
        }
        .list-more-link {
            display: flex;
            justify-content: flex-end;
            margin-top: 20px;
        }
        .list-more-link a {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-green-light);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .list-more-link a:hover {
            color: var(--accent-amber-soft);
        }

        /* ===== Expanded Topics ===== */
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .topic-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 20px 18px;
            transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
        }
        .topic-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
            border-color: var(--border-subtle);
        }
        .topic-card .topic-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background-color: rgba(94, 157, 111, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 12px;
        }
        .topic-card h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .topic-card p {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== Data Snapshot ===== */
        .snapshot-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .snapshot-item {
            background-color: rgba(30, 51, 43, 0.6);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            text-align: center;
            transition: background var(--transition-fast), border-color var(--transition-fast);
        }
        .snapshot-item:hover {
            background-color: var(--bg-card-hover);
            border-color: var(--border-subtle);
        }
        .snapshot-item .snap-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--accent-green-light);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .snapshot-item .snap-label {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ===== FAQ Section ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 760px;
        }
        .faq-item {
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--border-subtle);
        }
        .faq-item details {
            cursor: pointer;
        }
        .faq-item summary {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::before {
            content: '';
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--accent-green);
            flex-shrink: 0;
            transition: background var(--transition-fast);
        }
        .faq-item summary:hover::before {
            background-color: var(--accent-amber);
        }
        .faq-item summary::after {
            content: '+';
            margin-left: auto;
            font-size: 20px;
            color: var(--text-muted);
            transition: transform var(--transition-fast);
        }
        .faq-item details[open] summary::after {
            transform: rotate(45deg);
        }
        .faq-item .faq-answer {
            padding: 0 20px 18px 40px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== Featured Articles ===== */
        .featured-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .featured-card {
            display: flex;
            gap: 16px;
            background-color: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 16px;
            transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
            align-items: flex-start;
        }
        .featured-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
            border-color: var(--border-subtle);
        }
        .featured-card img {
            width: 140px;
            height: 100px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }
        .featured-card .featured-content h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.45;
        }
        .featured-card .featured-content p {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 6px;
        }
        .featured-card .featured-content a {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-green-light);
        }

        /* ===== Subscribe / Contact Panel ===== */
        .subscribe-panel {
            background-color: var(--bg-secondary);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .subscribe-panel .subscribe-text h2 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .subscribe-panel .subscribe-text p {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .subscribe-panel form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .subscribe-panel input[type="text"] {
            min-width: 220px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-subtle);
            background-color: rgba(20, 33, 29, 0.7);
            color: var(--text-primary);
            transition: border-color var(--transition-fast);
        }
        .subscribe-panel input[type="text"]::placeholder {
            color: var(--text-muted);
        }
        .subscribe-panel input[type="text"]:focus {
            border-color: var(--accent-green);
            outline: none;
        }
        .subscribe-panel .btn-subscribe {
            padding: 10px 20px;
            background-color: var(--accent-green);
            color: #f5f8f2;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 600;
            transition: background var(--transition-fast);
            white-space: nowrap;
        }
        .subscribe-panel .btn-subscribe:hover {
            background-color: var(--accent-green-light);
        }
        .subscribe-panel .btn-dismiss {
            padding: 10px 16px;
            border: 1px solid var(--border-subtle);
            color: var(--text-muted);
            border-radius: var(--radius-sm);
            font-size: 13px;
            transition: border-color var(--transition-fast), color var(--transition-fast);
            white-space: nowrap;
        }
        .subscribe-panel .btn-dismiss:hover {
            border-color: var(--accent-green);
            color: var(--text-primary);
        }

        /* ===== Footer ===== */
        .site-footer {
            background-color: var(--sidebar-bg);
            border-top: 1px solid var(--sidebar-border);
            padding: 28px 0 22px;
            margin-top: 0;
        }
        .site-footer .footer-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 14px;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
        }
        .site-footer .footer-links {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .site-footer .footer-links a {
            font-size: 12px;
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .site-footer .footer-links a:hover {
            color: var(--accent-green-light);
        }
        .site-footer .copyright {
            font-size: 12px;
            color: var(--text-muted);
            text-align: center;
            padding-top: 12px;
            border-top: 1px solid var(--border-subtle);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .topics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .snapshot-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-list-grid {
                grid-template-columns: 1fr;
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .category-header h1 {
                font-size: 28px;
            }
        }
        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
                width: 250px;
                padding-top: 20px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-header {
                display: flex;
            }
            .mobile-drawer-overlay {
                display: block;
                pointer-events: none;
            }
            .mobile-drawer-overlay.open {
                pointer-events: auto;
            }
            .main-wrapper {
                margin-left: 0;
            }
            .main-content {
                padding-top: 56px;
            }
            .category-header {
                min-height: 220px;
                padding: 36px 0 30px;
            }
            .category-header h1 {
                font-size: 24px;
            }
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }
            .topic-card {
                padding: 16px 14px;
            }
            .subscribe-panel {
                padding: 24px 18px;
                flex-direction: column;
                align-items: flex-start;
            }
            .subscribe-panel form {
                flex-direction: column;
                width: 100%;
            }
            .subscribe-panel input[type="text"] {
                min-width: auto;
                width: 100%;
            }
            .featured-card {
                flex-direction: column;
            }
            .featured-card img {
                width: 100%;
                height: 180px;
            }
        }
        @media (max-width: 520px) {
            .snapshot-grid {
                grid-template-columns: 1fr 1fr;
            }
            .topics-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 20px;
            }
            .category-header h1 {
                font-size: 21px;
            }
            .article-card .card-title {
                font-size: 15px;
            }
        }