/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a237e;
            --primary-light: #534bae;
            --primary-dark: #000051;
            --secondary: #ff6f00;
            --secondary-light: #ffa040;
            --accent: #00c853;
            --accent-light: #69f0ae;
            --bg: #f5f7fa;
            --bg-white: #ffffff;
            --bg-dark: #0d1117;
            --bg-section: #f0f2f5;
            --text: #1a1a2e;
            --text-light: #636e72;
            --text-white: #ffffff;
            --border: #e0e4e8;
            --border-light: #f0f0f0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
            --shadow-hover: 0 12px 48px rgba(0,0,0,0.18);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            overflow-x: hidden;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2.2rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.2rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-fluid {
            width: 100%;
            padding: 0 24px;
        }

        /* ===== Section ===== */
        section {
            padding: 80px 0;
            position: relative;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text);
        }
        .section-title p {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto;
        }
        .section-badge {
            display: inline-block;
            background: var(--primary-light);
            color: #fff;
            padding: 4px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        /* ===== Navigation ===== */
        .navbar {
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
            padding: 0;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            transition: var(--transition);
        }
        .navbar.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .navbar-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.5px;
            transition: var(--transition);
        }
        .navbar-brand:hover {
            color: var(--primary-light);
            transform: scale(1.01);
        }
        .navbar-brand i {
            font-size: 1.8rem;
            color: var(--secondary);
        }
        .navbar-brand span {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-menu a {
            padding: 8px 20px;
            border-radius: 40px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            transition: var(--transition);
            position: relative;
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(26, 35, 126, 0.3);
        }
        .nav-menu a.active {
            background: var(--primary);
            color: #fff;
        }
        .nav-cta {
            background: var(--secondary) !important;
            color: #fff !important;
            padding: 8px 24px !important;
            border-radius: 40px !important;
            font-weight: 700 !important;
            box-shadow: 0 4px 16px rgba(255, 111, 0, 0.3);
        }
        .nav-cta:hover {
            background: #e65100 !important;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 111, 0, 0.4) !important;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--text);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--border);
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 0 80px;
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, #0d1117 0%, #1a237e 50%, #000051 100%);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
            animation: heroZoom 20s ease-in-out infinite alternate;
        }
        @keyframes heroZoom {
            0% {
                transform: scale(1);
            }
            100% {
                transform: scale(1.05);
            }
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(26, 35, 126, 0.3) 0%, rgba(0, 0, 0, 0.7) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255, 111, 0, 0.2);
            color: var(--secondary-light);
            padding: 6px 24px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 600;
            letter-spacing: 1px;
            border: 1px solid rgba(255, 111, 0, 0.3);
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -1px;
            text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }
        .hero h1 span {
            background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.25rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            background: var(--secondary);
            color: #fff;
            border: none;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 8px 30px rgba(255, 111, 0, 0.35);
        }
        .btn-primary-custom:hover {
            background: #e65100;
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(255, 111, 0, 0.45);
            color: #fff;
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.4);
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline-custom:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            transform: translateY(-3px);
            color: #fff;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 60px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
            color: #fff;
        }
        .hero-stat .num {
            font-size: 2.5rem;
            font-weight: 900;
            background: linear-gradient(135deg, #fff, rgba(255, 255, 255, 0.7));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-stat .label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            border: 1px solid var(--border);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            margin: 0 auto 20px;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
        }
        .feature-card h3 {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== Category Cards ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: flex-end;
            padding: 32px;
            transition: var(--transition);
            box-shadow: var(--shadow-md);
            cursor: pointer;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .category-card .bg-img {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            transition: var(--transition);
        }
        .category-card:hover .bg-img {
            transform: scale(1.05);
        }
        .category-card .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.1) 100%);
        }
        .category-card .content {
            position: relative;
            z-index: 2;
            color: #fff;
        }
        .category-card .content h3 {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
        }
        .category-card .content p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
            margin-bottom: 16px;
        }
        .category-card .content .tag {
            display: inline-block;
            background: var(--secondary);
            color: #fff;
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* ===== Post Cards ===== */
        .post-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .post-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .post-card .thumb {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .post-card .body {
            padding: 20px 24px 24px;
        }
        .post-card .body .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .post-card .body .meta .cat {
            background: var(--primary-light);
            color: #fff;
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .post-card .body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .post-card .body h3 a {
            color: var(--text);
        }
        .post-card .body h3 a:hover {
            color: var(--primary);
        }
        .post-card .body p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            color: var(--text-light);
            font-size: 1.1rem;
        }

        /* ===== Stats / Data ===== */
        .stats-section {
            background: var(--bg-dark);
            color: #fff;
        }
        .stats-section .section-title h2 {
            color: #fff;
        }
        .stats-section .section-title p {
            color: rgba(255, 255, 255, 0.7);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }
        .stat-item {
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
        }
        .stat-item .num {
            font-size: 2.8rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-item .label {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 8px;
        }

        /* ===== Steps / Process ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(to right, var(--primary-light), var(--secondary));
            z-index: 0;
        }
        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
            background: var(--bg-white);
            padding: 28px 16px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 900;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(26, 35, 126, 0.3);
        }
        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text);
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            transition: var(--transition);
            color: var(--text-light);
        }
        .faq-question.open i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.8;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.1;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2.4rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.15rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-primary-custom {
            background: var(--secondary);
            box-shadow: 0 8px 30px rgba(255, 111, 0, 0.4);
        }
        .cta-section .btn-primary-custom:hover {
            background: #e65100;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand h3 i {
            color: var(--secondary);
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.95rem;
            max-width: 360px;
        }
        .footer h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer a {
            color: rgba(255, 255, 255, 0.6);
            display: block;
            padding: 4px 0;
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .footer a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            text-align: center;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            display: inline;
            color: rgba(255, 255, 255, 0.6);
            padding: 0;
        }
        .footer-bottom a:hover {
            color: var(--secondary);
            padding: 0;
        }

        /* ===== Mobile Nav ===== */
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 8px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 2px solid var(--border);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
            }
            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-menu a {
                width: 100%;
                text-align: center;
                padding: 12px 20px;
            }
            .nav-menu a.nav-cta {
                margin-top: 8px;
            }

            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat .num {
                font-size: 1.8rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .post-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .steps-grid::before {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            section {
                padding: 48px 0;
            }
            .section-title {
                margin-bottom: 32px;
            }
            .btn-primary-custom,
            .btn-outline-custom {
                padding: 14px 28px;
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .hero h1 {
                font-size: 1.7rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 12px;
            }
            .features-grid {
                gap: 16px;
            }
            .post-grid {
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .category-card {
                min-height: 200px;
                padding: 20px;
            }
        }

        /* ===== Utilities ===== */
        .text-center {
            text-align: center;
        }
        .mt-0 {
            margin-top: 0;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary);
        }

        /* Focus visible */
        :focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* Back to top */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            box-shadow: 0 4px 20px rgba(26, 35, 126, 0.3);
            z-index: 999;
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            border: none;
            cursor: pointer;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--primary-light);
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(26, 35, 126, 0.4);
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg: #f8f9fa;
            --bg-alt: #ffffff;
            --bg-dark: #1a1a2e;
            --text: #2b2d42;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #dee2e6;
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.15);
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font: 'Segoe UI','PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset ===== */
        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth;scroll-padding-top:var(--header-h)}
        body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
        img{max-width:100%;height:auto;display:block}
        a{color:inherit;text-decoration:none;transition:var(--transition)}
        button,input,textarea{font-family:inherit;font-size:inherit;outline:none;border:none;background:none}
        ul{list-style:none}
        .container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
        .container-narrow{max-width:860px;padding:0 24px;margin:0 auto}

        /* ===== 导航 ===== */
        .navbar{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--header-h);background:rgba(255,255,255,0.96);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid rgba(0,0,0,0.06);transition:var(--transition)}
        .navbar .container{display:flex;align-items:center;justify-content:space-between;height:100%}
        .navbar-brand{display:flex;align-items:center;gap:10px;font-size:1.35rem;font-weight:800;color:var(--primary);letter-spacing:-0.5px}
        .navbar-brand i{font-size:1.6rem;color:var(--primary)}
        .navbar-brand span{background:linear-gradient(135deg,var(--primary),var(--primary-dark));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
        .nav-toggle{display:none;font-size:1.5rem;color:var(--text);padding:8px;cursor:pointer;border-radius:var(--radius-sm)}
        .nav-toggle:hover{background:var(--bg)}
        .nav-menu{display:flex;align-items:center;gap:6px}
        .nav-menu a{padding:8px 18px;border-radius:var(--radius-sm);font-size:0.95rem;font-weight:500;color:var(--text);position:relative;transition:var(--transition)}
        .nav-menu a:hover{color:var(--primary);background:rgba(230,57,70,0.06)}
        .nav-menu a.active{color:var(--primary);background:rgba(230,57,70,0.10);font-weight:600}
        .nav-menu a.active::after{content:'';position:absolute;bottom:2px;left:50%;transform:translateX(-50%);width:20px;height:3px;background:var(--primary);border-radius:4px}
        .nav-cta{background:var(--primary) !important;color:var(--text-white) !important;padding:8px 24px !important;border-radius:var(--radius-sm) !important;font-weight:600 !important;display:flex;align-items:center;gap:8px;box-shadow:0 4px 12px rgba(230,57,70,0.3)}
        .nav-cta:hover{background:var(--primary-dark) !important;transform:translateY(-1px);box-shadow:0 8px 24px rgba(230,57,70,0.4) !important}

        /* ===== 文章 Hero ===== */
        .article-hero{background:linear-gradient(135deg,var(--secondary) 0%,#16213e 100%);padding:140px 0 60px;position:relative;overflow:hidden;margin-top:0}
        .article-hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:0.12;z-index:0}
        .article-hero .container-narrow{position:relative;z-index:1}
        .article-breadcrumb{display:flex;align-items:center;gap:8px;font-size:0.9rem;color:rgba(255,255,255,0.7);margin-bottom:24px;flex-wrap:wrap}
        .article-breadcrumb a{color:rgba(255,255,255,0.8);transition:var(--transition)}
        .article-breadcrumb a:hover{color:var(--accent)}
        .article-breadcrumb .sep{color:rgba(255,255,255,0.4)}
        .article-category{display:inline-block;background:var(--primary);color:var(--text-white);padding:4px 16px;border-radius:20px;font-size:0.8rem;font-weight:600;letter-spacing:0.5px;margin-bottom:16px}
        .article-hero h1{font-size:2.4rem;font-weight:800;color:var(--text-white);line-height:1.3;margin-bottom:16px;letter-spacing:-0.5px}
        .article-meta{display:flex;align-items:center;gap:24px;color:rgba(255,255,255,0.7);font-size:0.9rem;flex-wrap:wrap}
        .article-meta i{margin-right:6px;color:var(--accent)}
        .article-meta span{display:flex;align-items:center}

        /* ===== 文章正文 ===== */
        .article-main{padding:60px 0 40px;background:var(--bg-alt)}
        .article-body{font-size:1.05rem;line-height:1.9;color:var(--text)}
        .article-body p{margin-bottom:1.6em}
        .article-body h2{font-size:1.7rem;font-weight:700;margin:2em 0 0.8em;color:var(--secondary);line-height:1.3}
        .article-body h3{font-size:1.3rem;font-weight:600;margin:1.6em 0 0.6em;color:var(--secondary)}
        .article-body ul,.article-body ol{padding-left:1.5em;margin-bottom:1.6em}
        .article-body li{margin-bottom:0.5em}
        .article-body ul li::marker{color:var(--primary)}
        .article-body img{border-radius:var(--radius);margin:1.6em auto;box-shadow:var(--shadow)}
        .article-body blockquote{border-left:4px solid var(--primary);padding:1em 1.5em;margin:1.6em 0;background:rgba(230,57,70,0.04);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-light);font-style:italic}
        .article-body a{color:var(--primary);border-bottom:1px solid transparent}
        .article-body a:hover{border-bottom-color:var(--primary)}
        .article-body code{background:var(--bg);padding:2px 8px;border-radius:4px;font-size:0.9em;color:var(--primary-dark)}
        .article-body pre{background:var(--bg-dark);color:#e0e0e0;padding:20px;border-radius:var(--radius);overflow-x:auto;margin:1.6em 0;font-size:0.9rem}
        .article-body pre code{background:transparent;color:inherit;padding:0}
        .article-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:40px;padding-top:24px;border-top:1px solid var(--border)}
        .article-tags a{display:inline-block;padding:6px 16px;background:var(--bg);border-radius:20px;font-size:0.85rem;color:var(--text-light);transition:var(--transition)}
        .article-tags a:hover{background:var(--primary);color:var(--text-white)}
        .article-share{display:flex;align-items:center;gap:12px;margin-top:24px;padding-top:20px;border-top:1px solid var(--border)}
        .article-share span{font-weight:600;font-size:0.9rem;color:var(--text-light)}
        .article-share a{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background:var(--bg);color:var(--text-light);font-size:1.1rem;transition:var(--transition)}
        .article-share a:hover{background:var(--primary);color:var(--text-white);transform:translateY(-2px)}

        /* ===== 文章不存在 ===== */
        .not-found-wrap{text-align:center;padding:80px 20px}
        .not-found-wrap i{font-size:4rem;color:var(--text-light);margin-bottom:20px}
        .not-found-wrap h2{font-size:2rem;color:var(--text);margin-bottom:12px}
        .not-found-wrap p{color:var(--text-light);margin-bottom:24px;max-width:480px;margin-left:auto;margin-right:auto}
        .not-found-wrap .btn{display:inline-flex;align-items:center;gap:8px}

        /* ===== 按钮 ===== */
        .btn{display:inline-flex;align-items:center;gap:10px;padding:14px 32px;border-radius:var(--radius-sm);font-weight:600;font-size:1rem;cursor:pointer;transition:var(--transition);border:none;line-height:1}
        .btn-primary{background:var(--primary);color:var(--text-white);box-shadow:0 4px 16px rgba(230,57,70,0.3)}
        .btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 28px rgba(230,57,70,0.4)}
        .btn-outline{background:transparent;color:var(--text-white);border:2px solid var(--text-white)}
        .btn-outline:hover{background:var(--text-white);color:var(--secondary)}
        .btn-accent{background:var(--accent);color:var(--secondary);box-shadow:0 4px 16px rgba(244,162,97,0.3)}
        .btn-accent:hover{background:#e08f4a;transform:translateY(-2px);box-shadow:0 8px 28px rgba(244,162,97,0.4)}
        .btn-sm{padding:10px 20px;font-size:0.9rem}

        /* ===== 相关文章 ===== */
        .related-section{background:var(--bg);padding:60px 0}
        .related-section .section-title{text-align:center;margin-bottom:40px}
        .related-section .section-title h2{font-size:1.8rem;font-weight:700;color:var(--secondary);position:relative;display:inline-block}
        .related-section .section-title h2::after{content:'';display:block;width:60px;height:4px;background:var(--primary);border-radius:4px;margin:12px auto 0}
        .related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
        .related-card{background:var(--bg-alt);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:var(--transition);border:1px solid var(--border)}
        .related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
        .related-card img{width:100%;height:180px;object-fit:cover}
        .related-card .card-body{padding:20px}
        .related-card .card-tag{display:inline-block;background:rgba(230,57,70,0.1);color:var(--primary);padding:2px 12px;border-radius:12px;font-size:0.75rem;font-weight:600;margin-bottom:10px}
        .related-card h3{font-size:1.05rem;font-weight:600;color:var(--text);margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .related-card h3 a{color:inherit}
        .related-card h3 a:hover{color:var(--primary)}
        .related-card .card-meta{font-size:0.8rem;color:var(--text-light);display:flex;align-items:center;gap:12px}

        /* ===== FAQ ===== */
        .faq-section{background:var(--bg-alt);padding:60px 0}
        .faq-section .section-title{text-align:center;margin-bottom:40px}
        .faq-section .section-title h2{font-size:1.8rem;font-weight:700;color:var(--secondary);position:relative;display:inline-block}
        .faq-section .section-title h2::after{content:'';display:block;width:60px;height:4px;background:var(--primary);border-radius:4px;margin:12px auto 0}
        .faq-grid{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
        .faq-item{border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;transition:var(--transition)}
        .faq-item summary{padding:18px 24px;cursor:pointer;font-weight:600;font-size:1rem;color:var(--text);display:flex;align-items:center;gap:12px;transition:var(--transition);list-style:none}
        .faq-item summary::-webkit-details-marker{display:none}
        .faq-item summary::before{content:'\f059';font-family:'Font Awesome 6 Free';font-weight:900;color:var(--primary);font-size:1.1rem}
        .faq-item summary:hover{background:rgba(230,57,70,0.03)}
        .faq-item[open] summary{background:rgba(230,57,70,0.05);border-bottom:1px solid var(--border)}
        .faq-item[open] summary::before{content:'\f059';color:var(--primary-dark)}
        .faq-item .faq-answer{padding:0 24px 18px 52px;color:var(--text-light);font-size:0.95rem;line-height:1.7}

        /* ===== CTA ===== */
        .cta-section{background:linear-gradient(135deg,var(--secondary) 0%,#16213e 100%);padding:80px 0;text-align:center;position:relative;overflow:hidden}
        .cta-section::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;opacity:0.08;z-index:0}
        .cta-section .container{position:relative;z-index:1}
        .cta-section h2{font-size:2rem;font-weight:700;color:var(--text-white);margin-bottom:16px}
        .cta-section p{font-size:1.1rem;color:rgba(255,255,255,0.8);max-width:600px;margin:0 auto 32px}
        .cta-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

        /* ===== 页脚 ===== */
        .footer{background:var(--bg-dark);color:rgba(255,255,255,0.85);padding:60px 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{font-size:1.4rem;font-weight:700;color:var(--text-white);margin-bottom:16px;display:flex;align-items:center;gap:10px}
        .footer-brand h3 i{color:var(--primary)}
        .footer-brand p{font-size:0.9rem;line-height:1.7;color:rgba(255,255,255,0.6);max-width:360px}
        .footer h4{font-size:1rem;font-weight:600;color:var(--text-white);margin-bottom:18px;position:relative;padding-bottom:10px}
        .footer h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:var(--primary);border-radius:2px}
        .footer a{display:block;padding:6px 0;font-size:0.9rem;color:rgba(255,255,255,0.6);transition:var(--transition)}
        .footer a:hover{color:var(--accent);padding-left:4px}
        .footer a i{width:20px;margin-right:6px;color:var(--primary)}
        .footer-bottom{text-align:center;padding:24px 0;font-size:0.85rem;color:rgba(255,255,255,0.4);margin-top:0}
        .footer-bottom a{color:rgba(255,255,255,0.5);display:inline;padding:0}
        .footer-bottom a:hover{color:var(--accent)}

        /* ===== 响应式 ===== */
        @media(max-width:1024px){
            .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
            .article-hero h1{font-size:2rem}
        }
        @media(max-width:768px){
            .nav-toggle{display:block}
            .nav-menu{position:fixed;top:var(--header-h);left:0;right:0;background:rgba(255,255,255,0.98);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);flex-direction:column;padding:20px 24px;gap:10px;border-bottom:1px solid var(--border);transform:translateY(-120%);opacity:0;transition:var(--transition);pointer-events:none;box-shadow:0 20px 40px rgba(0,0,0,0.1)}
            .nav-menu.open{transform:translateY(0);opacity:1;pointer-events:auto}
            .nav-menu a{padding:12px 18px;width:100%;font-size:1rem}
            .nav-cta{margin-top:6px;justify-content:center}
            .article-hero{padding:120px 0 40px}
            .article-hero h1{font-size:1.6rem}
            .article-main{padding:40px 0}
            .article-body{font-size:0.98rem}
            .related-grid{grid-template-columns:1fr 1fr}
            .cta-section h2{font-size:1.5rem}
            .footer-grid{grid-template-columns:1fr;gap:28px}
        }
        @media(max-width:520px){
            .container{padding:0 16px}
            .article-hero h1{font-size:1.35rem}
            .article-meta{gap:12px;font-size:0.8rem;flex-wrap:wrap}
            .related-grid{grid-template-columns:1fr}
            .cta-btns{flex-direction:column;align-items:center}
            .cta-btns .btn{width:100%;justify-content:center}
            .article-body h2{font-size:1.3rem}
            .article-body h3{font-size:1.1rem}
            .navbar-brand{font-size:1.1rem}
            .navbar-brand i{font-size:1.3rem}
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg: #f8f9fa;
            --bg-alt: #ffffff;
            --bg-dark: #1a1a2e;
            --text: #212529;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #dee2e6;
            --border-light: #e9ecef;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.15);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font: 'Segoe UI','PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font);
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul,ol { list-style: none; }
        button,input,textarea { font-family: inherit; font-size: 1rem; outline: none; border: none; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
            color: var(--secondary);
            letter-spacing: -0.5px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            margin-bottom: 2.5rem;
            max-width: 640px;
        }
        .text-center { text-align: center; }
        .text-center .section-subtitle { margin-left: auto; margin-right: auto; }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: var(--primary);
            color: #fff;
        }
        .badge-secondary { background: var(--secondary); }
        .badge-accent { background: var(--accent); color: var(--secondary); }
        .badge-outline { background: transparent; border: 1.5px solid var(--primary); color: var(--primary); }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 12px 28px; border-radius: 50px; font-weight: 600;
            font-size: 0.95rem; cursor: pointer; transition: var(--transition);
            border: 2px solid transparent; white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary); color: #fff;
            box-shadow: 0 4px 14px rgba(230,57,70,0.35);
        }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(230,57,70,0.45); color: #fff; }
        .btn-secondary {
            background: var(--secondary); color: #fff;
            box-shadow: 0 4px 14px rgba(29,53,87,0.30);
        }
        .btn-secondary:hover { background: #15273f; transform: translateY(-2px); color: #fff; }
        .btn-outline {
            background: transparent; border-color: var(--primary); color: var(--primary);
        }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .btn-white {
            background: #fff; color: var(--primary);
        }
        .btn-white:hover { background: #f0f0f0; transform: translateY(-2px); }
        .btn-lg { padding: 16px 36px; font-size: 1.05rem; }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; }

        /* ===== Header & Nav ===== */
        .navbar {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--header-height);
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .navbar .container {
            display: flex; align-items: center; justify-content: space-between;
            height: 100%;
        }
        .navbar-brand {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.35rem; font-weight: 800; color: var(--secondary);
        }
        .navbar-brand i { color: var(--primary); font-size: 1.6rem; }
        .navbar-brand span { background: linear-gradient(135deg, var(--secondary), var(--primary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .navbar-brand:hover { color: var(--secondary); }
        .nav-menu {
            display: flex; align-items: center; gap: 6px;
        }
        .nav-menu a {
            padding: 8px 18px; border-radius: 50px; font-weight: 500;
            font-size: 0.92rem; color: var(--text); transition: var(--transition);
            position: relative;
        }
        .nav-menu a:hover { background: rgba(230,57,70,0.08); color: var(--primary); }
        .nav-menu a.active { background: var(--primary); color: #fff; }
        .nav-menu a.active:hover { background: var(--primary-dark); }
        .nav-cta {
            background: var(--primary); color: #fff !important;
            padding: 8px 22px; border-radius: 50px; font-weight: 600;
            box-shadow: 0 4px 12px rgba(230,57,70,0.3);
        }
        .nav-cta:hover { background: var(--primary-dark) !important; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(230,57,70,0.4); }
        .nav-toggle {
            display: none; background: none; font-size: 1.5rem;
            color: var(--secondary); cursor: pointer; padding: 4px 8px;
            border-radius: var(--radius-sm); transition: var(--transition);
        }
        .nav-toggle:hover { background: rgba(0,0,0,0.05); }

        /* ===== Hero ===== */
        .hero-inner {
            position: relative; min-height: 320px;
            display: flex; align-items: center; justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, var(--secondary) 0%, #0f1b2d 100%);
            overflow: hidden; padding: 80px 0 60px;
        }
        .hero-inner::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.20; mix-blend-mode: overlay;
        }
        .hero-inner::after {
            content: ''; position: absolute; bottom: -2px; left: 0; right: 0;
            height: 80px; background: var(--bg);
            clip-path: ellipse(70% 100% at 50% 100%);
        }
        .hero-inner .container { position: relative; z-index: 2; }
        .hero-inner h1 {
            font-size: 2.8rem; font-weight: 900; color: #fff;
            letter-spacing: -1px; margin-bottom: 16px;
            text-shadow: 0 4px 30px rgba(0,0,0,0.3);
        }
        .hero-inner p {
            font-size: 1.15rem; color: rgba(255,255,255,0.85);
            max-width: 700px; margin: 0 auto 24px;
        }
        .hero-breadcrumb {
            display: flex; justify-content: center; align-items: center; gap: 8px;
            font-size: 0.9rem; color: rgba(255,255,255,0.7); margin-bottom: 20px;
        }
        .hero-breadcrumb a { color: rgba(255,255,255,0.8); }
        .hero-breadcrumb a:hover { color: #fff; }
        .hero-breadcrumb i { font-size: 0.7rem; color: rgba(255,255,255,0.4); }

        /* ===== General Sections ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }

        /* ===== 官方入口列表 ===== */
        .entry-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 28px;
        }
        .entry-card {
            background: var(--bg-alt); border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow); border: 1px solid var(--border-light);
            transition: var(--transition); position: relative; overflow: hidden;
        }
        .entry-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .entry-card::before {
            content: ''; position: absolute; top: 0; left: 0; right: 0;
            height: 4px; background: linear-gradient(90deg, var(--primary), var(--accent));
        }
        .entry-card .icon {
            width: 56px; height: 56px; border-radius: var(--radius-sm);
            display: flex; align-items: center; justify-content: center;
            font-size: 1.6rem; background: rgba(230,57,70,0.1); color: var(--primary);
            margin-bottom: 18px;
        }
        .entry-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; color: var(--secondary); }
        .entry-card p { color: var(--text-light); font-size: 0.92rem; margin-bottom: 16px; line-height: 1.6; }
        .entry-card .meta {
            display: flex; align-items: center; gap: 12px;
            font-size: 0.82rem; color: var(--text-light); margin-top: auto;
        }
        .entry-card .meta .tag {
            padding: 2px 10px; border-radius: 50px; background: rgba(69,125,157,0.12);
            color: var(--secondary-light); font-weight: 500;
        }
        .entry-card .meta .tag-safe { background: rgba(42,157,143,0.12); color: #2a9d8f; }
        .entry-card .btn { margin-top: 12px; }

        /* ===== 安全提示 ===== */
        .safety-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .safety-card {
            background: var(--bg-alt); border-radius: var(--radius);
            padding: 28px 24px; text-align: center;
            border: 1px solid var(--border-light); transition: var(--transition);
        }
        .safety-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
        .safety-card .icon {
            width: 64px; height: 64px; border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 16px; font-size: 1.6rem;
        }
        .safety-card .icon-danger { background: rgba(230,57,70,0.1); color: var(--primary); }
        .safety-card .icon-shield { background: rgba(42,157,143,0.1); color: #2a9d8f; }
        .safety-card .icon-warn { background: rgba(244,162,97,0.15); color: var(--accent); }
        .safety-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; color: var(--secondary); }
        .safety-card p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; }

        /* ===== 步骤流程 ===== */
        .steps {
            display: flex; flex-wrap: wrap; gap: 0;
            position: relative; counter-reset: step;
        }
        .step-item {
            flex: 1 1 240px; padding: 32px 24px; text-align: center;
            position: relative; counter-increment: step;
        }
        .step-item::before {
            content: counter(step);
            width: 52px; height: 52px; border-radius: 50%;
            background: var(--primary); color: #fff;
            display: flex; align-items: center; justify-content: center;
            font-size: 1.4rem; font-weight: 800; margin: 0 auto 18px;
            box-shadow: 0 6px 20px rgba(230,57,70,0.3);
        }
        .step-item h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; color: var(--secondary); }
        .step-item p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; }
        .step-item:not(:last-child)::after {
            content: '\f054'; font-family: 'Font Awesome 6 Free'; font-weight: 900;
            position: absolute; right: -12px; top: 48px;
            color: var(--primary-light); font-size: 1rem; opacity: 0.5;
        }
        @media (max-width: 1024px) {
            .step-item:not(:last-child)::after { display: none; }
            .steps { gap: 16px; }
            .step-item { flex: 1 1 45%; }
        }
        @media (max-width: 640px) {
            .step-item { flex: 1 1 100%; }
        }

        /* ===== 常见问题 FAQ ===== */
        .faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
        .faq-item {
            background: var(--bg-alt); border-radius: var(--radius);
            border: 1px solid var(--border-light); overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow); }
        .faq-question {
            padding: 20px 28px; display: flex; align-items: center;
            justify-content: space-between; cursor: pointer;
            font-weight: 600; font-size: 1.02rem; color: var(--secondary);
            background: none; width: 100%; text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question i { transition: var(--transition); color: var(--primary); font-size: 0.85rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 28px; color: var(--text-light); font-size: 0.95rem; line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 400px; padding: 0 28px 24px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary) 0%, #0f1b2d 100%);
            position: relative; overflow: hidden; padding: 80px 0;
        }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.10; mix-blend-mode: overlay;
        }
        .cta-section .container { position: relative; z-index: 2; text-align: center; }
        .cta-section h2 { font-size: 2.2rem; font-weight: 800; color: #fff; margin-bottom: 16px; }
        .cta-section p { color: rgba(255,255,255,0.8); font-size: 1.05rem; max-width: 600px; margin: 0 auto 28px; }
        .cta-section .btn-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

        /* ===== 内容区块 ===== */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 28px;
        }
        .content-card {
            background: var(--bg-alt); border-radius: var(--radius);
            overflow: hidden; box-shadow: var(--shadow);
            border: 1px solid var(--border-light); transition: var(--transition);
        }
        .content-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .content-card .img-wrap {
            height: 200px; overflow: hidden; position: relative;
        }
        .content-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .content-card:hover .img-wrap img { transform: scale(1.05); }
        .content-card .body { padding: 24px; }
        .content-card .body .badge { margin-bottom: 10px; }
        .content-card .body h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; color: var(--secondary); }
        .content-card .body p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; margin-bottom: 12px; }
        .content-card .body .meta { display: flex; align-items: center; gap: 12px; font-size: 0.82rem; color: var(--text-light); }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 24px; text-align: center;
        }
        .stat-item { padding: 24px; }
        .stat-item .num {
            font-size: 2.6rem; font-weight: 900; color: var(--primary);
            line-height: 1.2; margin-bottom: 4px;
        }
        .stat-item .label { font-size: 0.95rem; color: var(--text-light); font-weight: 500; }

        /* ===== Footer ===== */
        .footer {
            background: var(--secondary); color: rgba(255,255,255,0.85);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px; padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .footer-brand h3 { font-size: 1.4rem; font-weight: 800; color: #fff; margin-bottom: 12px; }
        .footer-brand h3 i { color: var(--primary-light); margin-right: 6px; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.7); max-width: 360px; }
        .footer h4 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
        .footer a {
            display: block; padding: 4px 0; font-size: 0.9rem;
            color: rgba(255,255,255,0.7); transition: var(--transition);
        }
        .footer a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer a i { width: 20px; }
        .footer-bottom {
            text-align: center; padding: 24px 0;
            font-size: 0.85rem; color: rgba(255,255,255,0.5);
        }
        .footer-bottom a { display: inline; color: rgba(255,255,255,0.7); }
        .footer-bottom a:hover { color: var(--primary-light); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .hero-inner h1 { font-size: 2.2rem; }
            .section-title { font-size: 1.7rem; }
        }

        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav-menu {
                position: fixed; top: var(--header-height); left: 0; right: 0;
                background: rgba(255,255,255,0.98); backdrop-filter: blur(12px);
                flex-direction: column; padding: 20px 24px;
                border-bottom: 1px solid var(--border-light);
                transform: translateY(-120%); opacity: 0;
                transition: var(--transition); pointer-events: none;
                box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            }
            .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: all; }
            .nav-menu a { width: 100%; text-align: center; padding: 12px; font-size: 1rem; }
            .hero-inner h1 { font-size: 1.8rem; }
            .hero-inner p { font-size: 1rem; }
            .section-title { font-size: 1.5rem; }
            .entry-grid { grid-template-columns: 1fr; }
            .safety-grid { grid-template-columns: 1fr 1fr; }
            .content-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; text-align: center; }
            .footer-brand p { max-width: 100%; }
            .stats-grid { grid-template-columns: 1fr 1fr; }
            .step-item:not(:last-child)::after { display: none; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero-inner h1 { font-size: 1.5rem; }
            .hero-inner { min-height: 240px; padding: 60px 0 40px; }
            .section { padding: 50px 0; }
            .safety-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; }
            .cta-section h2 { font-size: 1.5rem; }
            .entry-card { padding: 24px 20px; }
            .faq-question { padding: 16px 20px; font-size: 0.95rem; }
            .faq-answer { padding: 0 20px; }
            .faq-item.active .faq-answer { padding: 0 20px 18px; }
        }

        /* ===== 辅助类 ===== */
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }
        .mb-5 { margin-bottom: 3rem; }
        .mt-2 { margin-top: 1rem; }
        .mt-4 { margin-top: 2rem; }
        .gap-2 { gap: 0.5rem; }
        .gap-3 { gap: 1rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }
        .w-full { width: 100%; }
        .relative { position: relative; }