/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f2b3d;
            --primary-light: #1a3f5a;
            --secondary: #2a9d8f;
            --secondary-light: #3dbdae;
            --accent: #e9c46a;
            --accent-light: #f0d68a;
            --bg: #f4f6f8;
            --bg-card: #ffffff;
            --bg-dark: #0b1e2c;
            --text: #1a2a3a;
            --text-light: #5a6a7a;
            --text-white: #f0f4f8;
            --border: #dce2e8;
            --radius: 14px;
            --radius-sm: 8px;
            --shadow: 0 8px 32px rgba(15, 43, 61, 0.08);
            --shadow-hover: 0 16px 48px rgba(15, 43, 61, 0.16);
            --transition: 0.25s ease;
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--secondary-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--primary);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: box-shadow var(--transition);
        }
        header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .logo a i {
            font-size: 26px;
            color: var(--secondary);
        }
        .logo a:hover {
            color: var(--primary);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-main a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: color var(--transition), border-color var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--primary);
        }
        .nav-main a.active {
            color: var(--secondary);
            border-bottom-color: var(--secondary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg);
            border-radius: 40px;
            padding: 0 16px;
            border: 1px solid var(--border);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--secondary);
            box-shadow: 0 0 0 3px rgba(42, 157, 143, 0.15);
        }
        .search-box input {
            background: transparent;
            padding: 8px 8px 8px 4px;
            min-width: 160px;
            font-size: 14px;
            color: var(--text);
        }
        .search-box input::placeholder {
            color: var(--text-light);
            opacity: 0.7;
        }
        .search-box button {
            background: transparent;
            color: var(--text-light);
            cursor: pointer;
            padding: 6px 4px;
            font-size: 15px;
            transition: color var(--transition);
        }
        .search-box button:hover {
            color: var(--secondary);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--secondary);
            color: #fff;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 14px;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            cursor: pointer;
            border: none;
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(42, 157, 143, 0.3);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 14px;
            border: 1.5px solid var(--primary);
            transition: background var(--transition), color var(--transition), transform var(--transition);
            cursor: pointer;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .hamburger {
            display: none;
            background: none;
            font-size: 26px;
            color: var(--primary);
            cursor: pointer;
            padding: 4px;
        }

        /* ===== Mobile Nav ===== */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            padding: 20px 24px;
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
            z-index: 999;
            flex-direction: column;
            gap: 16px;
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav a {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-light);
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
        }
        .mobile-nav a.active {
            color: var(--secondary);
        }
        .mobile-nav .btn-primary {
            justify-content: center;
            margin-top: 8px;
        }

        /* ===== Hero ===== */
        .hero {
            padding: 140px 0 80px;
            background: var(--bg-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            position: relative;
            color: var(--text-white);
            min-height: 80vh;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 30, 44, 0.88) 0%, rgba(15, 43, 61, 0.72) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero h1 {
            font-size: 52px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -1px;
            line-height: 1.15;
        }
        .hero h1 span {
            color: var(--accent);
        }
        .hero p {
            font-size: 20px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 700px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .hero-actions .btn-primary {
            padding: 16px 40px;
            font-size: 17px;
            background: var(--accent);
            color: var(--primary);
        }
        .hero-actions .btn-primary:hover {
            background: var(--accent-light);
            box-shadow: 0 8px 32px rgba(233, 196, 106, 0.35);
        }
        .hero-actions .btn-outline {
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
            padding: 16px 40px;
            font-size: 17px;
        }
        .hero-actions .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 52px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 36px;
            font-weight: 800;
            color: var(--accent);
            display: block;
        }
        .hero-stat .label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }

        /* ===== Sections ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-title h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .section-title p {
            font-size: 18px;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .section-bg-alt {
            background: var(--bg-card);
        }
        .section-bg-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-bg-dark .section-title h2 {
            color: #fff;
        }
        .section-bg-dark .section-title p {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== Cards ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .card .icon {
            font-size: 36px;
            color: var(--secondary);
            margin-bottom: 16px;
        }
        .card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .card p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .card .badge {
            display: inline-block;
            background: rgba(42, 157, 143, 0.12);
            color: var(--secondary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 40px;
            margin-top: 12px;
        }
        .card-cover {
            border-radius: var(--radius);
            overflow: hidden;
            padding: 0;
            background: var(--bg-card);
        }
        .card-cover img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .card-cover .card-body {
            padding: 20px 24px 24px;
        }
        .card-cover .card-body h3 {
            font-size: 18px;
            margin-bottom: 6px;
        }
        .card-cover .card-body .meta {
            font-size: 13px;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .card-cover .card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== Feature / Info Block ===== */
        .info-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .info-block.reverse {
            direction: rtl;
        }
        .info-block.reverse>* {
            direction: ltr;
        }
        .info-block .text h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .info-block .text p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .info-block .text ul {
            list-style: none;
            padding: 0;
        }
        .info-block .text ul li {
            padding: 8px 0;
            font-size: 15px;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .info-block .text ul li i {
            color: var(--secondary);
            font-size: 18px;
        }
        .info-block .media img {
            border-radius: var(--radius);
            width: 100%;
            height: auto;
            object-fit: cover;
            box-shadow: var(--shadow);
        }

        /* ===== Steps / Process ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: background var(--transition), transform var(--transition);
            position: relative;
        }
        .step-item:hover {
            background: rgba(255, 255, 255, 0.10);
            transform: translateY(-4px);
        }
        .step-item .step-num {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary);
            font-size: 22px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .step-item h4 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        }
        .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(42, 157, 143, 0.04);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-light);
            transition: transform var(--transition);
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius);
            padding: 60px 48px;
            text-align: center;
            color: #fff;
        }
        .cta-block h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-block p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .cta-block .btn-primary {
            background: var(--accent);
            color: var(--primary);
            padding: 16px 44px;
            font-size: 17px;
        }
        .cta-block .btn-primary:hover {
            background: var(--accent-light);
            box-shadow: 0 8px 32px rgba(233, 196, 106, 0.3);
        }

        /* ===== Latest Posts List ===== */
        .post-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 24px;
        }
        .post-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px;
            border: 1px solid var(--border);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .post-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .post-item .cat {
            font-size: 12px;
            font-weight: 600;
            color: var(--secondary);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 6px;
        }
        .post-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .post-item h3 a {
            color: var(--primary);
        }
        .post-item h3 a:hover {
            color: var(--secondary);
        }
        .post-item p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .post-item .meta {
            font-size: 13px;
            color: var(--text-light);
            display: flex;
            gap: 16px;
        }
        .post-item .meta i {
            margin-right: 4px;
        }
        .empty-tip {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-light);
            font-size: 16px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }

        /* ===== Footer ===== */
        footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand h3 i {
            color: var(--secondary);
            margin-right: 8px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 40px;
            }
            .hero p {
                font-size: 18px;
            }
            .info-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .info-block.reverse {
                direction: ltr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .nav-main {
                gap: 20px;
            }
            .search-box input {
                min-width: 120px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .nav-main {
                display: none;
            }
            .nav-actions .btn-primary {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .hero {
                padding: 100px 0 60px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero p {
                font-size: 16px;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat .num {
                font-size: 28px;
            }
            .section {
                padding: 56px 0;
            }
            .section-title h2 {
                font-size: 28px;
            }
            .section-title p {
                font-size: 16px;
            }
            .card-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .post-list {
                grid-template-columns: 1fr;
            }
            .steps {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .cta-block {
                padding: 40px 24px;
            }
            .cta-block h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .info-block .media img {
                max-height: 240px;
                object-fit: cover;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero h1 {
                font-size: 26px;
            }
            .hero p {
                font-size: 15px;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                padding: 12px 24px;
                font-size: 15px;
                width: 100%;
                justify-content: center;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .steps {
                grid-template-columns: 1fr;
            }
            .section-title h2 {
                font-size: 24px;
            }
            .search-box input {
                min-width: 80px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .logo a {
                font-size: 18px;
            }
            .logo a i {
                font-size: 20px;
            }
        }

/* roulang page: article */
/* ===== :root 设计变量 ===== */
    :root {
        --primary: #0f6cbf;
        --primary-dark: #0a4d8c;
        --primary-light: #e8f2fc;
        --secondary: #17a2b8;
        --secondary-light: #d4f1f9;
        --accent: #f59e0b;
        --accent-light: #fef3c7;
        --success: #10b981;
        --danger: #ef4444;
        --bg-body: #f8fafc;
        --bg-white: #ffffff;
        --bg-card: #ffffff;
        --bg-dark: #0f172a;
        --bg-footer: #0f172a;
        --text-primary: #1e293b;
        --text-secondary: #475569;
        --text-muted: #94a3b8;
        --text-white: #f1f5f9;
        --text-dark: #0f172a;
        --border: #e2e8f0;
        --border-light: #f1f5f9;
        --radius: 16px;
        --radius-sm: 10px;
        --radius-xs: 6px;
        --shadow: 0 4px 24px rgba(15, 108, 191, 0.08);
        --shadow-lg: 0 12px 40px rgba(15, 108, 191, 0.12);
        --shadow-hover: 0 16px 48px rgba(15, 108, 191, 0.16);
        --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        --max-width: 1200px;
        --header-height: 72px;
    }

    /* ===== Reset / Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
    body {
        font-family: var(--font);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text-primary);
        background: var(--bg-body);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--primary-dark); }
    a:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; border-radius: var(--radius-xs); }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-primary); }
    h1 { font-size: 2.4rem; letter-spacing: -0.02em; }
    h2 { font-size: 1.8rem; letter-spacing: -0.01em; }
    h3 { font-size: 1.35rem; }
    h4 { font-size: 1.1rem; }
    p { margin-bottom: 1rem; color: var(--text-secondary); }
    .container {
        width: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== Header / Nav ===== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        background: rgba(255,255,255,0.92);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 2px 12px rgba(0,0,0,0.04);
        height: var(--header-height);
        display: flex;
        align-items: center;
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.25rem;
        font-weight: 800;
        color: var(--text-primary);
        letter-spacing: -0.02em;
        white-space: nowrap;
    }
    .logo i { color: var(--primary); font-size: 1.5rem; }
    .logo span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
    .nav-main {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .nav-main a {
        padding: 8px 18px;
        border-radius: 30px;
        font-size: 0.9rem;
        font-weight: 500;
        color: var(--text-secondary);
        transition: all var(--transition);
        position: relative;
    }
    .nav-main a:hover { color: var(--primary); background: var(--primary-light); }
    .nav-main a.active {
        color: #fff;
        background: var(--primary);
        box-shadow: 0 4px 12px rgba(15,108,191,0.25);
    }
    .nav-main a.active:hover { color: #fff; background: var(--primary-dark); }
    .nav-actions {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .nav-actions .search-box {
        display: flex;
        align-items: center;
        background: var(--bg-body);
        border: 1px solid var(--border);
        border-radius: 30px;
        padding: 0 16px;
        transition: all var(--transition);
    }
    .nav-actions .search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(15,108,191,0.15); }
    .nav-actions .search-box input {
        border: none;
        background: transparent;
        padding: 8px 10px 8px 0;
        font-size: 0.85rem;
        outline: none;
        width: 140px;
        color: var(--text-primary);
    }
    .nav-actions .search-box input::placeholder { color: var(--text-muted); }
    .nav-actions .search-box i { color: var(--text-muted); font-size: 0.9rem; }
    .nav-actions .btn-login {
        padding: 8px 20px;
        border-radius: 30px;
        font-size: 0.85rem;
        font-weight: 600;
        color: var(--primary);
        background: transparent;
        border: 1.5px solid var(--primary);
        transition: all var(--transition);
        cursor: pointer;
    }
    .nav-actions .btn-login:hover { background: var(--primary); color: #fff; }
    .nav-actions .btn-cta {
        padding: 8px 22px;
        border-radius: 30px;
        font-size: 0.85rem;
        font-weight: 600;
        color: #fff;
        background: linear-gradient(135deg, var(--primary), var(--secondary));
        border: none;
        cursor: pointer;
        transition: all var(--transition);
        box-shadow: 0 4px 14px rgba(15,108,191,0.25);
    }
    .nav-actions .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(15,108,191,0.3); }
    .mobile-toggle { display: none; font-size: 1.4rem; color: var(--text-primary); background: none; border: none; cursor: pointer; padding: 4px; }

    /* ===== Mobile Nav ===== */
    @media (max-width: 900px) {
        .nav-main { display: none; }
        .nav-actions .search-box { display: none; }
        .nav-actions .btn-login { display: none; }
        .nav-actions .btn-cta { display: none; }
        .mobile-toggle { display: block; }
        .nav-main.open {
            display: flex;
            flex-direction: column;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            padding: 16px 24px;
            gap: 6px;
            z-index: 999;
        }
        .nav-main.open a { width: 100%; text-align: center; padding: 12px; border-radius: var(--radius-sm); }
        .nav-actions.mobile-open {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            padding: 12px 24px 20px;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
        }
        .nav-actions.mobile-open .search-box { display: flex; width: 100%; }
        .nav-actions.mobile-open .search-box input { width: 100%; }
        .nav-actions.mobile-open .btn-login { display: inline-flex; flex: 1; justify-content: center; }
        .nav-actions.mobile-open .btn-cta { display: inline-flex; flex: 1; justify-content: center; }
    }

    /* ===== Hero Banner (Article) ===== */
    .article-hero {
        position: relative;
        padding: 60px 0 48px;
        background: linear-gradient(135deg, #eef2f7 0%, #dce6f0 100%);
        overflow: hidden;
    }
    .article-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
        opacity: 0.15;
        pointer-events: none;
    }
    .article-hero .container {
        position: relative;
        z-index: 2;
    }
    .article-breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 0.85rem;
        color: var(--text-muted);
        margin-bottom: 20px;
    }
    .article-breadcrumb a { color: var(--text-muted); }
    .article-breadcrumb a:hover { color: var(--primary); }
    .article-breadcrumb i { font-size: 0.7rem; color: var(--text-muted); }
    .article-hero h1 {
        font-size: 2.2rem;
        font-weight: 800;
        color: var(--text-primary);
        max-width: 900px;
        line-height: 1.3;
        margin-bottom: 16px;
    }
    .article-meta {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 16px 24px;
        font-size: 0.9rem;
        color: var(--text-secondary);
    }
    .article-meta .badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 4px 14px;
        border-radius: 30px;
        font-size: 0.8rem;
        font-weight: 600;
        background: var(--primary-light);
        color: var(--primary);
    }
    .article-meta .badge i { font-size: 0.75rem; }
    .article-meta span { display: flex; align-items: center; gap: 6px; }
    .article-meta span i { color: var(--text-muted); font-size: 0.85rem; }

    /* ===== Article Main ===== */
    .article-main {
        padding: 48px 0 60px;
    }
    .article-layout {
        display: grid;
        grid-template-columns: 1fr 320px;
        gap: 48px;
        align-items: start;
    }
    .article-body {
        background: var(--bg-white);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        padding: 40px 44px;
        border: 1px solid var(--border);
    }
    .article-body .article-content {
        font-size: 1.05rem;
        line-height: 1.85;
        color: var(--text-secondary);
    }
    .article-body .article-content h2,
    .article-body .article-content h3,
    .article-body .article-content h4 {
        margin-top: 2rem;
        margin-bottom: 0.8rem;
        color: var(--text-primary);
    }
    .article-body .article-content p {
        margin-bottom: 1.2rem;
    }
    .article-body .article-content ul,
    .article-body .article-content ol {
        margin-bottom: 1.2rem;
        padding-left: 1.6rem;
    }
    .article-body .article-content ul { list-style: disc; }
    .article-body .article-content ol { list-style: decimal; }
    .article-body .article-content li { margin-bottom: 0.4rem; color: var(--text-secondary); }
    .article-body .article-content img { border-radius: var(--radius-sm); margin: 1.5rem 0; box-shadow: var(--shadow); }
    .article-body .article-content blockquote {
        border-left: 4px solid var(--primary);
        background: var(--primary-light);
        padding: 16px 24px;
        margin: 1.5rem 0;
        border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
        color: var(--text-secondary);
        font-style: italic;
    }
    .article-body .article-content a { color: var(--primary); font-weight: 500; text-decoration: underline; text-underline-offset: 2px; }
    .article-body .article-content a:hover { color: var(--primary-dark); }
    .article-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 32px;
        padding-top: 24px;
        border-top: 1px solid var(--border);
    }
    .article-tags .tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 16px;
        border-radius: 30px;
        font-size: 0.8rem;
        font-weight: 500;
        background: var(--bg-body);
        color: var(--text-secondary);
        border: 1px solid var(--border);
        transition: all var(--transition);
    }
    .article-tags .tag:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }

    /* ===== Sidebar ===== */
    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 28px;
    }
    .sidebar-card {
        background: var(--bg-white);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        padding: 28px;
        border: 1px solid var(--border);
    }
    .sidebar-card h3 {
        font-size: 1.05rem;
        font-weight: 700;
        margin-bottom: 18px;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .sidebar-card h3 i { color: var(--primary); }
    .sidebar-list { display: flex; flex-direction: column; gap: 12px; }
    .sidebar-list a {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        padding: 10px 0;
        border-bottom: 1px solid var(--border-light);
        transition: all var(--transition);
    }
    .sidebar-list a:last-child { border-bottom: none; }
    .sidebar-list a:hover { padding-left: 6px; }
    .sidebar-list a .thumb {
        width: 60px;
        height: 60px;
        border-radius: var(--radius-xs);
        object-fit: cover;
        flex-shrink: 0;
        background: var(--bg-body);
    }
    .sidebar-list a .info { flex: 1; min-width: 0; }
    .sidebar-list a .info .title {
        font-size: 0.9rem;
        font-weight: 600;
        color: var(--text-primary);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        line-height: 1.4;
        margin-bottom: 4px;
    }
    .sidebar-list a .info .date {
        font-size: 0.78rem;
        color: var(--text-muted);
    }
    .sidebar-cta {
        background: linear-gradient(135deg, var(--primary), var(--secondary));
        color: #fff;
        text-align: center;
        padding: 32px 24px;
        border-radius: var(--radius);
    }
    .sidebar-cta h4 { color: #fff; font-size: 1.15rem; margin-bottom: 8px; }
    .sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 0.9rem; margin-bottom: 18px; }
    .sidebar-cta .btn-outline-light {
        display: inline-block;
        padding: 10px 28px;
        border-radius: 30px;
        border: 2px solid #fff;
        color: #fff;
        font-weight: 600;
        font-size: 0.9rem;
        transition: all var(--transition);
    }
    .sidebar-cta .btn-outline-light:hover { background: #fff; color: var(--primary); }

    /* ===== Related Articles ===== */
    .related-section {
        padding: 48px 0 60px;
        background: var(--bg-body);
        border-top: 1px solid var(--border);
    }
    .related-section h2 {
        text-align: center;
        margin-bottom: 32px;
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .related-card {
        background: var(--bg-white);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        overflow: hidden;
        border: 1px solid var(--border);
        transition: all var(--transition);
    }
    .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .related-card .card-img {
        width: 100%;
        height: 180px;
        object-fit: cover;
        background: var(--bg-body);
    }
    .related-card .card-body { padding: 20px 22px; }
    .related-card .card-body .card-cat {
        font-size: 0.75rem;
        font-weight: 600;
        color: var(--primary);
        text-transform: uppercase;
        letter-spacing: 0.05em;
        margin-bottom: 6px;
    }
    .related-card .card-body h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
    .related-card .card-body h4 a { color: var(--text-primary); }
    .related-card .card-body h4 a:hover { color: var(--primary); }
    .related-card .card-body p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .related-card .card-body .meta { font-size: 0.8rem; color: var(--text-muted); display: flex; align-items: center; gap: 12px; }

    /* ===== Not Found ===== */
    .not-found-box {
        text-align: center;
        padding: 60px 24px;
        background: var(--bg-white);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        border: 1px solid var(--border);
    }
    .not-found-box i { font-size: 3rem; color: var(--text-muted); margin-bottom: 16px; }
    .not-found-box h2 { font-size: 1.6rem; margin-bottom: 12px; }
    .not-found-box p { color: var(--text-secondary); margin-bottom: 24px; }
    .not-found-box .btn-home {
        display: inline-block;
        padding: 12px 32px;
        border-radius: 30px;
        background: var(--primary);
        color: #fff;
        font-weight: 600;
        transition: all var(--transition);
    }
    .not-found-box .btn-home:hover { background: var(--primary-dark); transform: translateY(-2px); }

    /* ===== Footer ===== */
    footer {
        background: var(--bg-footer);
        color: var(--text-white);
        padding: 56px 0 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .footer-brand h3 {
        color: #fff;
        font-size: 1.3rem;
        font-weight: 800;
        margin-bottom: 14px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .footer-brand h3 i { color: var(--secondary); }
    .footer-brand p { color: rgba(255,255,255,0.65); font-size: 0.9rem; line-height: 1.7; max-width: 360px; }
    .footer-col h4 {
        color: #fff;
        font-size: 0.95rem;
        font-weight: 700;
        margin-bottom: 16px;
    }
    .footer-col a {
        display: block;
        color: rgba(255,255,255,0.6);
        font-size: 0.88rem;
        padding: 5px 0;
        transition: all var(--transition);
    }
    .footer-col a:hover { color: #fff; padding-left: 4px; }
    .footer-bottom {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        padding: 20px 0;
        font-size: 0.82rem;
        color: rgba(255,255,255,0.45);
    }
    .footer-bottom a { color: rgba(255,255,255,0.55); }
    .footer-bottom a:hover { color: #fff; }
    .footer-bottom span { display: flex; align-items: center; gap: 8px; }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .article-layout { grid-template-columns: 1fr; }
        .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
        .related-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
        .article-hero h1 { font-size: 1.6rem; }
        .article-body { padding: 24px 20px; }
        .article-meta { gap: 10px 16px; font-size: 0.82rem; }
        .article-sidebar { grid-template-columns: 1fr; }
        .related-grid { grid-template-columns: 1fr; }
        .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        .footer-brand { grid-column: 1 / -1; }
        h1 { font-size: 1.8rem; }
        h2 { font-size: 1.4rem; }
    }
    @media (max-width: 520px) {
        .header-inner { padding: 0 16px; }
        .logo { font-size: 1.05rem; }
        .logo i { font-size: 1.2rem; }
        .article-hero { padding: 36px 0 28px; }
        .article-hero h1 { font-size: 1.3rem; }
        .article-body { padding: 16px; }
        .footer-grid { grid-template-columns: 1fr; gap: 24px; }
        .footer-bottom { flex-direction: column; gap: 6px; text-align: center; }
        .container { padding: 0 16px; }
    }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f6c6f;
            --primary-light: #1a8f93;
            --primary-dark: #0a4d50;
            --secondary: #2d9b8e;
            --accent: #f0b34b;
            --accent-light: #f8d48a;
            --bg-body: #f6f9f9;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0b2b2d;
            --bg-section-alt: #eef4f4;
            --text-primary: #1a2b2c;
            --text-secondary: #3d5a5c;
            --text-weak: #7a9698;
            --text-white: #f0f7f7;
            --border-light: #dce8e8;
            --border-card: #e4eeee;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(11, 43, 45, 0.06);
            --shadow-md: 0 6px 24px rgba(11, 43, 45, 0.08);
            --shadow-lg: 0 12px 40px rgba(11, 43, 45, 0.12);
            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 2rem;
            --space-lg: 3.5rem;
            --space-xl: 5rem;
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 2px;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 600;
            color: var(--text-primary);
        }
        h1 {
            font-size: 2.6rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.35rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 4px rgba(11, 43, 45, 0.04);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary-dark);
            white-space: nowrap;
        }
        .logo i {
            font-size: 1.5rem;
            color: var(--primary);
        }
        .logo span {
            color: var(--primary-dark);
        }
        .logo:hover {
            color: var(--primary-dark);
            opacity: 0.9;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 2rem;
        }
        .nav-main a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 0.4rem 0;
            position: relative;
            transition: color var(--transition);
        }
        .nav-main a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width var(--transition);
        }
        .nav-main a:hover {
            color: var(--primary);
        }
        .nav-main a:hover::after {
            width: 100%;
        }
        .nav-main a.active {
            color: var(--primary);
        }
        .nav-main a.active::after {
            width: 100%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .search-toggle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            padding: 0.5rem;
            border-radius: 50%;
            transition: background var(--transition), color var(--transition);
        }
        .search-toggle:hover {
            background: var(--bg-section-alt);
            color: var(--primary);
        }
        .btn-nav {
            padding: 0.5rem 1.2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
        }
        .btn-nav-outline {
            border: 1.5px solid var(--border-light);
            color: var(--text-secondary);
            background: transparent;
        }
        .btn-nav-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(15, 108, 111, 0.04);
        }
        .btn-nav-solid {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 8px rgba(15, 108, 111, 0.25);
        }
        .btn-nav-solid:hover {
            background: var(--primary-light);
            box-shadow: 0 4px 16px rgba(15, 108, 111, 0.35);
            transform: translateY(-1px);
            color: #fff;
        }
        .mobile-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--text-primary);
            padding: 0.4rem;
            background: none;
            border: none;
            cursor: pointer;
        }

        /* ===== 按钮通用 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.7rem 1.8rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 1.5px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 12px rgba(15, 108, 111, 0.25);
        }
        .btn-primary:hover {
            background: var(--primary-light);
            box-shadow: 0 6px 24px rgba(15, 108, 111, 0.35);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            border-color: var(--border-light);
            color: var(--text-secondary);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(15, 108, 111, 0.04);
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--accent);
            color: #1a2b2c;
            box-shadow: 0 2px 12px rgba(240, 179, 75, 0.3);
        }
        .btn-accent:hover {
            background: var(--accent-light);
            box-shadow: 0 6px 24px rgba(240, 179, 75, 0.4);
            transform: translateY(-2px);
            color: #1a2b2c;
        }
        .btn-lg {
            padding: 0.9rem 2.4rem;
            font-size: 1.05rem;
        }

        /* ===== Hero ===== */
        .hero-category {
            padding-top: calc(var(--header-height) + 2rem);
            padding-bottom: 3.5rem;
            background: linear-gradient(135deg, #0b2b2d 0%, #1a5c5e 100%);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .hero-category::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .hero-category .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero-category h1 {
            color: var(--text-white);
            font-size: 2.8rem;
            font-weight: 700;
            margin-bottom: 1rem;
            letter-spacing: -0.01em;
        }
        .hero-category p {
            color: rgba(240, 247, 247, 0.85);
            font-size: 1.15rem;
            max-width: 680px;
            margin: 0 auto 1.8rem;
            line-height: 1.7;
        }
        .hero-badges {
            display: flex;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .hero-badges span {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--text-white);
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-badges span i {
            color: var(--accent);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--space-xl) 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-title {
            text-align: center;
            margin-bottom: var(--space-lg);
        }
        .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--text-primary);
        }
        .section-title p {
            max-width: 600px;
            margin: 0 auto;
            color: var(--text-weak);
            font-size: 1.05rem;
        }

        /* ===== 卡片网格 ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.8rem;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            padding: 1.8rem 1.6rem;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .card-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: rgba(15, 108, 111, 0.08);
            color: var(--primary);
            font-size: 1.4rem;
            margin-bottom: 1rem;
            transition: background var(--transition);
        }
        .card:hover .card-icon {
            background: rgba(15, 108, 111, 0.14);
        }
        .card h3 {
            font-size: 1.15rem;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }
        .card p {
            font-size: 0.95rem;
            color: var(--text-weak);
            margin-bottom: 0;
        }
        .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 500;
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            background: rgba(15, 108, 111, 0.08);
            color: var(--primary);
            margin-top: 0.8rem;
        }
        .card-img {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 1rem;
            background: var(--bg-section-alt);
            aspect-ratio: 16/9;
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .card:hover .card-img img {
            transform: scale(1.04);
        }

        /* ===== 统计数字 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            text-align: center;
        }
        .stat-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 2rem 1rem;
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .stat-number {
            font-size: 2.6rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .stat-number small {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-weak);
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-top: 0.3rem;
        }

        /* ===== 流程步骤 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            position: relative;
        }
        .step-item {
            text-align: center;
            position: relative;
        }
        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            margin: 0 auto 1rem;
            box-shadow: 0 4px 12px rgba(15, 108, 111, 0.25);
            position: relative;
            z-index: 2;
        }
        .step-item h4 {
            font-size: 1.05rem;
            margin-bottom: 0.4rem;
            color: var(--text-primary);
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-weak);
            margin-bottom: 0;
            max-width: 220px;
            margin-left: auto;
            margin-right: auto;
        }
        .steps-connector {
            display: none;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 1.2rem 1.6rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(15, 108, 111, 0.03);
        }
        .faq-question i {
            color: var(--text-weak);
            transition: transform var(--transition);
            font-size: 0.9rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 1.6rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.6rem 1.2rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0b2b2d 0%, #1a5c5e 100%);
            padding: var(--space-xl) 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: var(--text-white);
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }
        .cta-section p {
            color: rgba(240, 247, 247, 0.8);
            max-width: 560px;
            margin: 0 auto 2rem;
            font-size: 1.05rem;
        }
        .cta-section .btn {
            font-size: 1.05rem;
            padding: 0.9rem 2.6rem;
        }

        /* ===== 页脚 ===== */
        footer {
            background: var(--bg-dark);
            color: rgba(240, 247, 247, 0.8);
            padding: var(--space-lg) 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand h3 {
            color: var(--text-white);
            font-size: 1.2rem;
            margin-bottom: 0.6rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .footer-brand h3 i {
            color: var(--secondary);
        }
        .footer-brand p {
            color: rgba(240, 247, 247, 0.6);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        .footer-col a {
            display: block;
            color: rgba(240, 247, 247, 0.6);
            font-size: 0.9rem;
            padding: 0.3rem 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--secondary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.8rem;
            font-size: 0.85rem;
            color: rgba(240, 247, 247, 0.5);
        }
        .footer-bottom a {
            color: rgba(240, 247, 247, 0.6);
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--secondary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero-category h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
                --space-xl: 3rem;
                --space-lg: 2.5rem;
            }
            .nav-main {
                display: none;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 1.5rem 2rem;
                gap: 1rem;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                z-index: 999;
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                font-size: 1.05rem;
                padding: 0.6rem 0;
                width: 100%;
            }
            .nav-main a::after {
                display: none;
            }
            .nav-main a.active {
                color: var(--primary);
                font-weight: 600;
            }
            .nav-actions .btn-nav {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .hero-category {
                min-height: 300px;
                padding-top: calc(var(--header-height) + 1.5rem);
                padding-bottom: 2.5rem;
            }
            .hero-category h1 {
                font-size: 1.8rem;
            }
            .hero-category p {
                font-size: 1rem;
            }
            .section-title h2 {
                font-size: 1.6rem;
            }
            .grid-3,
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
            .stat-number {
                font-size: 2rem;
            }
            .steps {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .card {
                padding: 1.4rem 1.2rem;
            }
            .hero-badges span {
                font-size: 0.8rem;
                padding: 0.3rem 1rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }
            .hero-category h1 {
                font-size: 1.5rem;
            }
            .hero-category p {
                font-size: 0.92rem;
            }
            .section-title h2 {
                font-size: 1.4rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.8rem;
            }
            .stat-item {
                padding: 1.2rem 0.8rem;
            }
            .stat-number {
                font-size: 1.7rem;
            }
            .btn-lg {
                padding: 0.7rem 1.6rem;
                font-size: 0.95rem;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.2rem;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .gap-1 {
            gap: 1rem;
        }
        .flex-center {
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            font-size: 0.78rem;
            font-weight: 500;
            padding: 0.2rem 0.9rem;
            border-radius: 50px;
            background: rgba(15, 108, 111, 0.08);
            color: var(--primary);
            border: 1px solid rgba(15, 108, 111, 0.12);
        }
        .badge i {
            font-size: 0.7rem;
        }
        .badge-accent {
            background: rgba(240, 179, 75, 0.12);
            color: #8a6d2b;
            border-color: rgba(240, 179, 75, 0.2);
        }
        .cover-img {
            width: 100%;
            border-radius: var(--radius-sm);
            aspect-ratio: 16/9;
            object-fit: cover;
            background: var(--bg-section-alt);
        }