/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2332;
            --primary-light: #2a3a52;
            --accent: #f58a1f;
            --accent-hover: #e07b0e;
            --accent-light: #fef3e6;
            --bg: #f5f7fa;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f8fafc;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 20px;
            --radius-full: 50px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', 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: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--primary);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.2rem);
        }
        h3 {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
        }
        p {
            margin-bottom: 0.8em;
            color: var(--text-light);
        }
        p:last-child {
            margin-bottom: 0;
        }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header & Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(26, 35, 50, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .header.scrolled {
            background: rgba(26, 35, 50, 0.98);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .logo span {
            background: linear-gradient(135deg, #fff 60%, var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        .nav a.active {
            color: #fff;
            background: var(--accent);
            box-shadow: 0 4px 14px rgba(245, 138, 31, 0.35);
        }
        .nav a.active:hover {
            background: var(--accent-hover);
        }
        .nav-cta {
            padding: 8px 22px !important;
            background: var(--accent) !important;
            color: #fff !important;
            border-radius: var(--radius-full) !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 14px rgba(245, 138, 31, 0.3);
            margin-left: 8px;
        }
        .nav-cta:hover {
            background: var(--accent-hover) !important;
            box-shadow: 0 6px 20px rgba(245, 138, 31, 0.4) !important;
            transform: translateY(-1px);
        }
        .menu-toggle {
            display: none;
            font-size: 1.5rem;
            color: #fff;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
            .nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(26, 35, 50, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 8px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.35s ease;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav a {
                width: 100%;
                text-align: center;
                padding: 12px 18px;
                font-size: 1rem;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 6px;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 120px 0 80px;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 35, 50, 0.88) 40%, rgba(26, 35, 50, 0.4) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(245, 138, 31, 0.2);
            border: 1px solid rgba(245, 138, 31, 0.3);
            padding: 6px 20px;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            color: var(--accent);
            font-weight: 500;
            margin-bottom: 28px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero h1 {
            color: #fff;
            font-size: clamp(2.2rem, 6vw, 3.8rem);
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero h1 span {
            background: linear-gradient(135deg, var(--accent), #ffb347);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            align-items: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            box-shadow: 0 8px 28px rgba(245, 138, 31, 0.35);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            box-shadow: 0 12px 36px rgba(245, 138, 31, 0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.3);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.5);
            color: #fff;
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            justify-content: center;
            margin-top: 54px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stat .num span {
            color: var(--accent);
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 80vh;
                padding: 100px 0 60px;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat .num {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
        }

        /* ===== Section通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            max-width: 580px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .section-tag {
            display: inline-block;
            background: var(--accent-light);
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
        }

        /* ===== 特性卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-4px);
            border-color: var(--border);
        }
        .feature-card .icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: var(--accent-light);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto 18px;
            transition: background var(--transition), transform var(--transition);
        }
        .feature-card:hover .icon {
            background: var(--accent);
            color: #fff;
            transform: scale(1.05);
        }
        .feature-card h3 {
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.92rem;
        }
        @media (max-width: 900px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--primary);
            min-height: 260px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .category-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .category-card .bg-img {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            transition: transform 0.5s ease;
        }
        .category-card:hover .bg-img {
            transform: scale(1.05);
        }
        .category-card .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 35, 50, 0.8) 40%, rgba(26, 35, 50, 0.3) 100%);
            z-index: 1;
        }
        .category-card .content {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #fff;
            padding: 40px 24px;
        }
        .category-card .content h3 {
            color: #fff;
            font-size: 1.5rem;
            margin-bottom: 8px;
        }
        .category-card .content p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            max-width: 360px;
            margin: 0 auto 18px;
        }
        .category-card .content .btn-sm {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 24px;
            border-radius: var(--radius-full);
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 0.85rem;
            transition: all var(--transition);
        }
        .category-card .content .btn-sm:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            color: #fff;
        }
        @media (max-width: 700px) {
            .category-grid {
                grid-template-columns: 1fr;
            }
            .category-card {
                min-height: 200px;
            }
        }

        /* ===== 最新资讯列表 ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .post-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-4px);
            border-color: var(--border);
        }
        .post-card .thumb {
            width: 100%;
            aspect-ratio: 16 / 10;
            background: var(--primary-light);
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
        }
        .post-card .thumb .cat-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: var(--radius-full);
        }
        .post-card .body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .post-card .body h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card .body h3 a {
            color: var(--primary);
        }
        .post-card .body h3 a:hover {
            color: var(--accent);
        }
        .post-card .body .excerpt {
            font-size: 0.88rem;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
            flex: 1;
        }
        .post-card .body .meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
        }
        .post-card .body .meta .date {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .post-card .body .meta .date i {
            font-size: 0.72rem;
        }
        .post-card .body .meta .more-link {
            color: var(--accent);
            font-weight: 600;
            font-size: 0.82rem;
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .post-card .body .meta .more-link:hover {
            color: var(--accent-hover);
        }
        .empty-posts {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
            color: var(--text-light);
        }
        .empty-posts i {
            font-size: 2.4rem;
            color: var(--border);
            margin-bottom: 16px;
            display: block;
        }
        .empty-posts p {
            font-size: 1rem;
        }
        @media (max-width: 900px) {
            .posts-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .posts-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 数据流程 ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .process-step {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }
        .process-step:hover {
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .process-step .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent-light);
            color: var(--accent);
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            transition: background var(--transition), color var(--transition);
        }
        .process-step:hover .step-num {
            background: var(--accent);
            color: #fff;
        }
        .process-step h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.88rem;
            margin-bottom: 0;
        }
        @media (max-width: 900px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .process-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
        }
        .faq-q {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 1rem;
            color: var(--primary);
            cursor: pointer;
            gap: 16px;
            user-select: none;
        }
        .faq-q i {
            color: var(--accent);
            font-size: 0.9rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }
        .faq-a {
            padding: 0 24px 0;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease;
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-a {
            padding: 0 24px 20px;
            max-height: 300px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            padding: 80px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 35, 50, 0.9) 50%, rgba(26, 35, 50, 0.5) 100%);
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            max-width: 520px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }
        .cta-section .btn-primary {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2);
        }
        .cta-section .btn-primary:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            box-shadow: 0 12px 36px rgba(245, 138, 31, 0.4);
        }
        .cta-section .btn-outline {
            border-color: rgba(255, 255, 255, 0.3);
            color: #fff;
        }
        .cta-section .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }
        .footer-brand .logo {
            font-size: 1.2rem;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
            line-height: 1.6;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            margin-bottom: 14px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.5);
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        /* ===== 回到顶部 ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 20px rgba(245, 138, 31, 0.35);
            transition: all var(--transition);
            opacity: 0;
            pointer-events: none;
            transform: translateY(20px);
            z-index: 999;
        }
        .back-top.visible {
            opacity: 1;
            pointer-events: auto;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(245, 138, 31, 0.45);
            color: #fff;
        }
        @media (max-width: 520px) {
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --primary-gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
            --secondary: #f59e0b;
            --secondary-light: #fef3c7;
            --accent: #10b981;
            --accent-light: #d1fae5;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-dark-2: #1e293b;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-white: #ffffff;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --container-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 12px 28px; border-radius: var(--radius-md);
            font-weight: 600; font-size: 15px;
            border: none; cursor: pointer;
            transition: var(--transition); line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary-gradient); color: var(--text-white);
            box-shadow: 0 4px 14px rgba(37,99,235,0.35);
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(37,99,235,0.45); color: #fff; }
        .btn-secondary {
            background: var(--bg-card); color: var(--primary);
            border: 2px solid var(--border-color);
        }
        .btn-secondary:hover { border-color: var(--primary); background: var(--primary-light); transform: translateY(-2px); }
        .btn-sm { padding: 8px 18px; font-size: 13px; border-radius: var(--radius-sm); }
        .btn-lg { padding: 16px 36px; font-size: 17px; border-radius: var(--radius-lg); }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: var(--primary-light);
            color: var(--primary);
        }
        .badge-secondary { background: var(--secondary-light); color: #b45309; }
        .badge-accent { background: var(--accent-light); color: #047857; }

        /* ===== Header & Nav ===== */
        .header {
            position: fixed; top: 0; left: 0; right: 0;
            height: var(--header-height);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: var(--transition);
        }
        .header.scrolled { box-shadow: var(--shadow-md); }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: 100%; max-width: var(--container-width); margin: 0 auto; padding: 0 24px;
        }
        .logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 22px; font-weight: 800;
            color: var(--text-primary);
        }
        .logo i { color: var(--primary); font-size: 26px; }
        .logo span { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .nav { display: flex; align-items: center; gap: 8px; }
        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500; font-size: 15px;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav a:hover { color: var(--primary); background: var(--primary-light); }
        .nav a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
        .nav a.active::after { display: none; }
        .nav a.nav-cta {
            background: var(--primary-gradient);
            color: var(--text-white) !important;
            padding: 10px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(37,99,235,0.3);
        }
        .nav a.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(37,99,235,0.4); }
        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; background: none; border: none; }
        .hamburger span { width: 26px; height: 3px; background: var(--text-primary); border-radius: 3px; transition: var(--transition); }

        /* ===== Hero Banner (Article Header) ===== */
        .article-hero {
            margin-top: var(--header-height);
            padding: 100px 0 60px;
            background: var(--primary-gradient);
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .article-hero .container-narrow { position: relative; z-index: 1; }
        .article-hero .badge { background: rgba(255,255,255,0.2); color: #fff; backdrop-filter: blur(4px); margin-bottom: 16px; }
        .article-hero h1 {
            font-size: clamp(28px, 4vw, 44px);
            color: var(--text-white);
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.15);
        }
        .article-hero .meta {
            display: flex; flex-wrap: wrap; gap: 20px;
            color: rgba(255,255,255,0.85);
            font-size: 14px;
        }
        .article-hero .meta i { margin-right: 6px; }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 16px 0;
            font-size: 14px;
            color: var(--text-muted);
            background: var(--bg-body);
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb a { color: var(--text-muted); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--text-secondary); }
        .breadcrumb .sep { margin: 0 10px; color: var(--border-color); }

        /* ===== Article Content ===== */
        .article-main {
            padding: 48px 0 64px;
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .article-content .featured-image {
            width: 100%;
            border-radius: var(--radius-md);
            margin-bottom: 32px;
            max-height: 480px;
            object-fit: cover;
            box-shadow: var(--shadow-md);
        }
        .article-content .content-body {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text-secondary);
        }
        .article-content .content-body p {
            margin-bottom: 1.4em;
        }
        .article-content .content-body h2,
        .article-content .content-body h3 {
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            color: var(--text-primary);
        }
        .article-content .content-body h2 { font-size: 26px; }
        .article-content .content-body h3 { font-size: 20px; }
        .article-content .content-body ul,
        .article-content .content-body ol {
            margin: 1em 0;
            padding-left: 1.6em;
        }
        .article-content .content-body li {
            margin-bottom: 0.5em;
            list-style: disc;
        }
        .article-content .content-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 24px;
            margin: 1.4em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
        }
        .article-content .content-body code {
            background: var(--bg-dark);
            color: #e2e8f0;
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
        }
        .article-content .content-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content .content-body a:hover { color: var(--primary-dark); }

        .article-footer-meta {
            display: flex; flex-wrap: wrap; gap: 16px;
            padding-top: 32px; margin-top: 40px;
            border-top: 1px solid var(--border-light);
            font-size: 14px; color: var(--text-muted);
        }
        .article-footer-meta i { margin-right: 6px; }

        /* ===== Article Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .not-found-box i { font-size: 56px; color: var(--text-muted); margin-bottom: 24px; }
        .not-found-box h2 { font-size: 28px; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-secondary); margin-bottom: 24px; }

        /* ===== Related Posts ===== */
        .related-section {
            margin-top: 48px;
        }
        .related-section h2 {
            font-size: 24px;
            margin-bottom: 24px;
            display: flex; align-items: center; gap: 12px;
        }
        .related-section h2 i { color: var(--primary); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .related-card img {
            width: 100%; height: 170px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .body { padding: 18px 20px 20px; }
        .related-card .body h3 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
        .related-card .body h3 a { color: var(--text-primary); }
        .related-card .body h3 a:hover { color: var(--primary); }
        .related-card .body p { font-size: 13px; color: var(--text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .body .meta-row { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; font-size: 12px; color: var(--text-muted); }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 56px 0 0;
        }
        .footer .container { padding: 0 24px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .logo span { background: none; -webkit-text-fill-color: #fff; }
        .footer-brand .logo i { color: var(--primary); }
        .footer-brand p { font-size: 14px; line-height: 1.7; max-width: 380px; }
        .footer-col h4 {
            color: #fff; font-size: 16px; font-weight: 600;
            margin-bottom: 18px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.6);
            font-size: 14px;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--primary); padding-left: 4px; }
        .footer-col a i { width: 20px; margin-right: 4px; }
        .footer-bottom {
            display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
            padding: 24px 0;
            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(--primary); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .article-content { padding: 36px 28px; }
        }

        @media (max-width: 768px) {
            :root { --header-height: 64px; }
            .hamburger { display: flex; }
            .nav {
                position: fixed; top: var(--header-height); left: 0; right: 0;
                flex-direction: column; background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                padding: 20px 24px; gap: 6px;
                border-bottom: 1px solid var(--border-light);
                transform: translateY(-110%);
                opacity: 0;
                transition: var(--transition);
                box-shadow: var(--shadow-lg);
                pointer-events: none;
            }
            .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav a { width: 100%; padding: 12px 16px; font-size: 16px; }
            .nav a.nav-cta { text-align: center; margin-top: 8px; }
            .article-hero { padding: 80px 0 40px; }
            .article-hero h1 { font-size: 24px; }
            .article-content { padding: 24px 18px; border-radius: var(--radius-md); }
            .article-content .content-body { font-size: 16px; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
            .breadcrumb { font-size: 12px; padding: 12px 0; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 20px; }
            .article-hero .meta { flex-direction: column; gap: 8px; font-size: 13px; }
            .article-content { padding: 18px 14px; }
            .article-content .content-body { font-size: 15px; }
            .article-footer-meta { flex-direction: column; gap: 8px; }
            .related-card img { height: 140px; }
        }

        /* ===== Mobile Menu Toggle ===== */
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

        /* ===== Skeleton / Loading fade ===== */
        .fade-in { animation: fadeIn 0.5s ease forwards; }
        @keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #60a5fa;
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --accent: #8b5cf6;
            --dark: #0f172a;
            --dark-light: #1e293b;
            --bg: #f8fafc;
            --bg-card: #ffffff;
            --bg-soft: #f1f5f9;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.10);
            --shadow-hover: 0 16px 48px rgba(37, 99, 235, 0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --nav-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);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            transition: var(--transition);
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--dark);
        }

        h1 {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
        }
        h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2vw, 1.5rem);
        }
        h4 {
            font-size: 1.125rem;
        }

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

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            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);
            height: var(--nav-height);
            transition: var(--transition);
        }

        .header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--dark);
        }

        .logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }

        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav a {
            padding: 8px 18px;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
        }

        .nav a:hover {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.06);
        }

        .nav a.active {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.10);
            font-weight: 600;
        }

        .nav a.nav-cta {
            background: var(--primary);
            color: var(--text-white);
            padding: 8px 24px;
            font-weight: 600;
            border-radius: 40px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav a.nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.30);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }

        .nav-toggle span {
            width: 26px;
            height: 2.5px;
            background: var(--dark);
            border-radius: 4px;
            transition: var(--transition);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Banner / Hero ===== */
        .page-banner {
            margin-top: var(--nav-height);
            padding: 80px 0 64px;
            background: linear-gradient(135deg, var(--dark) 0%, #1e3a5f 100%);
            position: relative;
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.20;
            mix-blend-mode: overlay;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(37, 99, 235, 0.25) 0%, transparent 60%);
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .banner-content {
            max-width: 720px;
        }

        .banner-content .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 20px;
        }

        .banner-content .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
        }
        .banner-content .breadcrumb a:hover {
            color: var(--text-white);
        }
        .banner-content .breadcrumb span {
            color: var(--secondary);
        }

        .banner-content h1 {
            color: var(--text-white);
            font-size: clamp(2.2rem, 5vw, 3.4rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
        }

        .banner-content h1 i {
            color: var(--secondary);
            margin-right: 12px;
        }

        .banner-content p {
            color: rgba(255, 255, 255, 0.80);
            font-size: 1.15rem;
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 600px;
        }

        .banner-search {
            display: flex;
            max-width: 520px;
            background: rgba(255, 255, 255, 0.12);
            border-radius: 60px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            overflow: hidden;
            backdrop-filter: blur(8px);
        }

        .banner-search input {
            flex: 1;
            padding: 14px 24px;
            background: transparent;
            color: var(--text-white);
            font-size: 0.95rem;
            border: none;
            outline: none;
            min-width: 0;
        }

        .banner-search input::placeholder {
            color: rgba(255, 255, 255, 0.50);
        }

        .banner-search button {
            padding: 14px 28px;
            background: var(--secondary);
            color: var(--dark);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }

        .banner-search button:hover {
            background: var(--secondary-dark);
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
        }

        .section-header h2 {
            margin-bottom: 12px;
        }

        .section-header h2 i {
            color: var(--primary);
            margin-right: 10px;
        }

        .section-header p {
            color: var(--text-light);
            font-size: 1.05rem;
        }

        .section-header .tagline {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        /* ===== Intro Block ===== */
        .intro-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .intro-block .intro-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .intro-block .intro-image img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            transition: var(--transition);
        }

        .intro-block .intro-image:hover img {
            transform: scale(1.03);
        }

        .intro-block .intro-text h3 {
            font-size: 1.8rem;
            margin-bottom: 16px;
        }

        .intro-block .intro-text p {
            color: var(--text-light);
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .intro-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text);
            padding: 8px 12px;
            background: var(--bg-soft);
            border-radius: var(--radius-sm);
        }

        .intro-features li i {
            color: var(--primary);
            font-size: 1.1rem;
        }

        /* ===== Category Tags ===== */
        .category-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 8px;
        }

        .category-tags .tag {
            padding: 10px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-light);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .category-tags .tag i {
            color: var(--primary);
            font-size: 0.9rem;
        }

        .category-tags .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(37, 99, 235, 0.04);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        .category-tags .tag.active {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }

        .category-tags .tag.active i {
            color: var(--text-white);
        }

        /* ===== Guide Cards Grid ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }

        .guide-card .card-image {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .guide-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .guide-card .card-image .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 14px;
            background: rgba(15, 23, 42, 0.75);
            backdrop-filter: blur(6px);
            color: var(--text-white);
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 40px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .guide-card .card-image .card-badge i {
            font-size: 0.7rem;
        }

        .guide-card .card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .guide-card .card-body .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 10px;
        }

        .guide-card .card-body .card-tags span {
            padding: 2px 10px;
            background: rgba(37, 99, 235, 0.07);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 20px;
        }

        .guide-card .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dark);
            line-height: 1.4;
        }

        .guide-card .card-body p {
            color: var(--text-light);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
        }

        .guide-card .card-body .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-light);
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }

        .guide-card .card-body .card-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .guide-card .card-body .card-meta i {
            font-size: 0.8rem;
        }

        /* ===== Steps / Process ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-item {
            text-align: center;
            padding: 36px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
        }

        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: var(--primary-light);
        }

        .step-item .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: var(--text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 800;
            margin: 0 auto 18px;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
        }

        .step-item h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }

        .step-item p {
            color: var(--text-light);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .step-item .step-arrow {
            position: absolute;
            right: -16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--primary-light);
            font-size: 1.2rem;
            opacity: 0.5;
        }

        .steps-grid .step-item:last-child .step-arrow {
            display: none;
        }

        /* ===== Hot Picks ===== */
        .hot-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .hot-card {
            display: flex;
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .hot-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }

        .hot-card .hot-image {
            width: 200px;
            min-height: 160px;
            flex-shrink: 0;
            overflow: hidden;
        }

        .hot-card .hot-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .hot-card .hot-body {
            padding: 18px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .hot-card .hot-body .hot-tag {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(245, 158, 11, 0.12);
            color: var(--secondary-dark);
            font-size: 0.7rem;
            font-weight: 700;
            border-radius: 20px;
            margin-bottom: 8px;
            width: fit-content;
        }

        .hot-card .hot-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .hot-card .hot-body p {
            color: var(--text-light);
            font-size: 0.85rem;
            line-height: 1.5;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-item .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--dark);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            gap: 16px;
            background: none;
            width: 100%;
            text-align: left;
            border: none;
        }

        .faq-item .faq-question i {
            color: var(--primary);
            font-size: 1.1rem;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item .faq-question .faq-toggle {
            color: var(--text-light);
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .faq-item.active .faq-question .faq-toggle {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-item .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        .faq-item.active {
            border-color: var(--primary-light);
            box-shadow: 0 2px 12px rgba(37, 99, 235, 0.06);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--dark) 0%, #1e3a5f 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: 0.08;
            mix-blend-mode: overlay;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            color: var(--text-white);
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            margin-bottom: 16px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 32px;
        }

        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            background: var(--secondary);
            color: var(--dark);
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 60px;
            transition: var(--transition);
        }

        .cta-section .cta-btn:hover {
            background: var(--secondary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(245, 158, 11, 0.30);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 30px;
        }

        .footer .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            color: var(--text-white);
            margin-bottom: 16px;
        }

        .footer-brand .logo i {
            color: var(--primary-light);
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 360px;
        }

        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }

        .footer-col a i {
            margin-right: 8px;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.40);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.50);
        }

        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .step-item .step-arrow {
                display: none;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

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

            .hot-card .hot-image {
                width: 160px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
            }

            .nav {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
            }

            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav a {
                width: 100%;
                padding: 12px 18px;
                border-radius: var(--radius-sm);
            }

            .nav a.nav-cta {
                justify-content: center;
                margin-top: 8px;
            }

            .nav-toggle {
                display: flex;
            }

            .page-banner {
                padding: 60px 0 48px;
                min-height: 300px;
            }

            .banner-content h1 {
                font-size: clamp(1.6rem, 6vw, 2.2rem);
            }

            .banner-content p {
                font-size: 1rem;
            }

            .banner-search {
                flex-direction: column;
                border-radius: var(--radius-sm);
                background: rgba(255, 255, 255, 0.08);
            }

            .banner-search input {
                padding: 12px 18px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.10);
            }

            .banner-search button {
                padding: 12px 18px;
                justify-content: center;
                border-radius: 0;
            }

            .section {
                padding: 56px 0;
            }

            .section-header {
                margin-bottom: 32px;
            }

            .intro-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .intro-block .intro-image img {
                height: 220px;
            }

            .intro-features {
                grid-template-columns: 1fr;
            }

            .guide-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .guide-card .card-image {
                height: 180px;
            }

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

            .step-item {
                padding: 24px 16px;
            }

            .step-item .step-number {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
            }

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

            .hot-card .hot-image {
                width: 100%;
                height: 160px;
            }

            .category-tags {
                gap: 8px;
            }

            .category-tags .tag {
                padding: 6px 16px;
                font-size: 0.8rem;
            }

            .faq-item .faq-question {
                padding: 14px 18px;
                font-size: 0.95rem;
            }

            .faq-item .faq-answer {
                padding: 0 18px 14px;
            }

            .cta-section {
                padding: 56px 0;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .page-banner {
                padding: 48px 0 36px;
                min-height: 260px;
            }

            .banner-content h1 {
                font-size: 1.5rem;
            }

            .banner-content p {
                font-size: 0.9rem;
                margin-bottom: 20px;
            }

            .section {
                padding: 40px 0;
            }

            .section-header h2 {
                font-size: 1.4rem;
            }

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

            .guide-card .card-body {
                padding: 16px 18px 18px;
            }

            .guide-card .card-body h3 {
                font-size: 1.05rem;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }

            .cta-section .cta-btn {
                padding: 14px 28px;
                font-size: 0.95rem;
            }

            .footer {
                padding: 40px 0 24px;
            }
        }

        /* ===== Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
            }
        }