/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f6e3f;
            --primary-dark: #0a522e;
            --primary-light: #1a8f54;
            --secondary: #f5a623;
            --secondary-light: #f7c35a;
            --accent: #e8f5e9;
            --bg: #f5f7f6;
            --bg-card: #ffffff;
            --bg-dark: #0d1f17;
            --text: #1a2a22;
            --text-light: #5a6f64;
            --text-white: #f0f7f3;
            --border: #dce8e0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 8px 32px rgba(15, 110, 63, 0.08);
            --shadow-lg: 0 20px 60px rgba(15, 110, 63, 0.12);
            --shadow-hover: 0 16px 48px rgba(15, 110, 63, 0.16);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        a:hover {
            color: var(--primary-dark);
        }

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-xs);
        }

        button,
        input,
        textarea {
            font-family: var(--font);
            font-size: 1rem;
            border: none;
            outline: none;
            transition: all var(--transition);
        }

        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        ul {
            list-style: none;
        }

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

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Floating Dock Nav ===== */
        .site-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            justify-content: center;
            pointer-events: none;
        }

        .nav-dock {
            pointer-events: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border: 1px solid rgba(255, 255, 255, 0.6);
            border-radius: 60px;
            padding: 8px 12px 8px 24px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.04);
            width: 100%;
            max-width: 820px;
            transition: box-shadow var(--transition), background var(--transition);
        }

        .nav-dock:hover {
            box-shadow: 0 8px 40px rgba(15, 110, 63, 0.10);
            background: rgba(255, 255, 255, 0.95);
        }

        .nav-logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary-dark);
            white-space: nowrap;
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .nav-logo i {
            font-size: 1.4rem;
            color: var(--secondary);
        }

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

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }

        .nav-links a {
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: var(--accent);
        }

        .nav-links a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 2px 12px rgba(15, 110, 63, 0.25);
        }

        .nav-links a.active:hover {
            background: var(--primary-dark);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border-radius: 30px;
            padding: 0 12px 0 16px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(15, 110, 63, 0.10);
            background: #fff;
        }

        .nav-search input {
            background: transparent;
            border: none;
            padding: 7px 0;
            font-size: 0.85rem;
            width: 110px;
            color: var(--text);
        }

        .nav-search input::placeholder {
            color: var(--text-light);
            opacity: 0.7;
        }

        .nav-search button {
            background: transparent;
            color: var(--text-light);
            padding: 6px 4px 6px 8px;
            cursor: pointer;
            font-size: 0.9rem;
            border-left: 1px solid var(--border);
        }

        .nav-search button:hover {
            color: var(--primary);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            font-size: 1.4rem;
            color: var(--text);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
        }

        .nav-toggle:hover {
            background: var(--accent);
        }

        /* Mobile menu */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.4);
            backdrop-filter: blur(4px);
            z-index: 999;
            padding-top: 80px;
            justify-content: center;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu-inner {
            background: #fff;
            border-radius: 24px;
            padding: 24px 32px;
            width: 90%;
            max-width: 400px;
            max-height: 70vh;
            overflow-y: auto;
            box-shadow: 0 24px 80px rgba(0, 0, 0, 0.2);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .mobile-menu-inner a {
            padding: 12px 20px;
            border-radius: 12px;
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--text);
            transition: all var(--transition);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .mobile-menu-inner a:hover {
            background: var(--accent);
            color: var(--primary);
        }

        .mobile-menu-inner a.active {
            background: var(--primary);
            color: #fff;
        }

        .mobile-menu-close {
            position: absolute;
            top: 20px;
            right: 20px;
            background: #fff;
            border: none;
            font-size: 1.6rem;
            color: var(--text);
            cursor: pointer;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
        }

        @media (max-width: 768px) {
            .site-header {
                top: 12px;
            }

            .nav-dock {
                padding: 6px 10px 6px 16px;
                border-radius: 40px;
                max-width: calc(100% - 16px);
            }

            .nav-links {
                display: none;
            }

            .nav-search {
                display: none;
            }

            .nav-toggle {
                display: block;
            }

            .nav-logo {
                font-size: 1.1rem;
            }

            .nav-logo i {
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .nav-dock {
                padding: 4px 8px 4px 12px;
                border-radius: 32px;
            }

            .nav-logo {
                font-size: 0.95rem;
            }

            .nav-logo i {
                font-size: 1rem;
            }

            .nav-toggle {
                font-size: 1.2rem;
                padding: 2px 6px;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-dark);
            overflow: hidden;
            padding: 120px 24px 80px;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.55;
            filter: saturate(1.1) brightness(0.7);
            transform: scale(1.02);
            transition: transform 0.8s ease;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(15, 110, 63, 0.40) 0%, transparent 70%),
                linear-gradient(180deg, rgba(13, 31, 23, 0.70) 0%, rgba(13, 31, 23, 0.30) 50%, rgba(13, 31, 23, 0.80) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            animation: heroFadeIn 1s ease forwards;
        }

        @keyframes heroFadeIn {
            0% {
                opacity: 0;
                transform: translateY(24px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.10);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: var(--text-white);
            margin-bottom: 24px;
            letter-spacing: 0.5px;
        }

        .hero-badge i {
            color: var(--secondary);
        }

        .hero h1 {
            font-size: 3.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -1px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.20);
        }

        .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: 1.2rem;
            color: rgba(255, 255, 255, 0.80);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.7;
            text-shadow: 0 1px 8px rgba(0, 0, 0, 0.15);
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition);
            border: none;
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 20px rgba(15, 110, 63, 0.30);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(15, 110, 63, 0.40);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 12px rgba(15, 110, 63, 0.25);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.25);
            backdrop-filter: blur(8px);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.22);
            border-color: rgba(255, 255, 255, 0.40);
            transform: translateY(-2px);
            color: #fff;
        }

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

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }

        @media (max-width: 768px) {
            .hero {
                padding: 100px 16px 60px;
                min-height: 92vh;
            }

            .hero h1 {
                font-size: 2.2rem;
            }

            .hero p {
                font-size: 1rem;
            }

            .hero-actions {
                flex-direction: column;
                align-items: center;
            }

            .btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.8rem;
            }

            .hero-badge {
                font-size: 0.75rem;
                padding: 4px 14px;
            }
        }

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

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

        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }

        .section-dark h2,
        .section-dark .section-sub {
            color: #fff;
        }

        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-header h2 {
            font-size: 2.4rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .section-header h2 i {
            color: var(--primary);
            margin-right: 6px;
        }

        .section-header .section-sub {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
        }

        .section-divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 16px auto 0;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }

            .section-header h2 {
                font-size: 1.7rem;
            }

            .section-header .section-sub {
                font-size: 0.95rem;
            }

            .section-header {
                margin-bottom: 36px;
            }
        }

        /* ===== Features / 优势 ===== */
        .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);
            border: 1px solid var(--border);
            transition: all var(--transition);
            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;
            margin: 0 auto 20px;
            font-size: 1.8rem;
            color: #fff;
            background: var(--primary);
        }

        .feature-icon.gold {
            background: var(--secondary);
        }

        .feature-icon.teal {
            background: #0d7a6e;
        }

        .feature-card h3 {
            font-size: 1.25rem;
            margin-bottom: 10px;
        }

        .feature-card p {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        @media (max-width: 900px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 560px) {
            .features-grid {
                grid-template-columns: 1fr;
            }

            .feature-card {
                padding: 28px 20px;
            }
        }

        /* ===== Category / 分类入口 ===== */
        .category-section {
            background: var(--bg-card);
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-dark);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            min-height: 280px;
            display: flex;
            align-items: flex-end;
        }

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

        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

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

        .category-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 30%, rgba(13, 31, 23, 0.85) 100%);
        }

        .category-body {
            position: relative;
            z-index: 2;
            padding: 32px 28px;
            color: #fff;
            width: 100%;
        }

        .category-body h3 {
            color: #fff;
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .category-body p {
            color: rgba(255, 255, 255, 0.80);
            font-size: 0.95rem;
            margin-bottom: 16px;
        }

        .category-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.20);
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 0.8rem;
            color: #fff;
        }

        @media (max-width: 768px) {
            .category-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .category-card {
                min-height: 220px;
            }

            .category-body h3 {
                font-size: 1.3rem;
            }
        }

        /* ===== Latest Posts / 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);
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

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

        .post-thumb {
            position: relative;
            width: 100%;
            padding-top: 60%;
            overflow: hidden;
            background: var(--bg);
        }

        .post-thumb img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .post-thumb .post-cat {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 14px;
            border-radius: 20px;
            z-index: 2;
            backdrop-filter: blur(4px);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        }

        .post-body {
            padding: 22px 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .post-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-body h3 a {
            color: var(--text);
        }

        .post-body h3 a:hover {
            color: var(--primary);
        }

        .post-body p {
            color: var(--text-light);
            font-size: 0.9rem;
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }

        .post-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-light);
            border-top: 1px solid var(--border);
            padding-top: 14px;
            margin-top: auto;
        }

        .post-meta span i {
            margin-right: 4px;
        }

        .post-meta .post-date {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .empty-posts {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            color: var(--text-light);
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }

        .empty-posts i {
            font-size: 2.4rem;
            color: var(--border);
            margin-bottom: 12px;
            display: block;
        }

        @media (max-width: 900px) {
            .posts-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 560px) {
            .posts-grid {
                grid-template-columns: 1fr;
            }

            .post-body {
                padding: 18px 16px 20px;
            }
        }

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

        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            position: relative;
            transition: all var(--transition);
        }

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

        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary);
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            border: 2px solid var(--primary-light);
        }

        .step-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }

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

        .step-arrow {
            position: absolute;
            top: 50%;
            right: -18px;
            transform: translateY(-50%);
            font-size: 1.4rem;
            color: var(--border);
            z-index: 2;
        }

        .step-card:last-child .step-arrow {
            display: none;
        }

        @media (max-width: 900px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .step-arrow {
                display: none;
            }
        }

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

        /* ===== Stats / 数据 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.15);
        }

        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.75);
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .stat-number {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .stat-item {
                padding: 20px 12px;
            }

            .stat-number {
                font-size: 1.8rem;
            }
        }

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

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

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            background: transparent;
            width: 100%;
            text-align: left;
            gap: 16px;
        }

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

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

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

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

        .faq-answer a {
            color: var(--primary);
            text-decoration: underline;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 14px 18px;
                font-size: 0.95rem;
            }

            .faq-answer {
                padding: 0 18px 14px;
                font-size: 0.9rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            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: 0.15;
            filter: brightness(0.5);
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 60px 24px;
        }

        .cta-content h2 {
            color: #fff;
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }

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

        .cta-content .btn {
            font-size: 1.1rem;
            padding: 16px 44px;
        }

        @media (max-width: 768px) {
            .cta-content h2 {
                font-size: 1.6rem;
            }

            .cta-content p {
                font-size: 0.95rem;
            }

            .cta-content {
                padding: 40px 16px;
            }

            .cta-content .btn {
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0a1a13;
            color: rgba(255, 255, 255, 0.70);
            padding: 60px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .nav-logo {
            font-size: 1.4rem;
            margin-bottom: 12px;
            display: inline-flex;
        }

        .footer-brand .nav-logo span {
            -webkit-text-fill-color: #fff;
            background: none;
            color: #fff;
        }

        .footer-brand .nav-logo i {
            color: var(--secondary);
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            max-width: 300px;
            line-height: 1.7;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.60);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: all var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }

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

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px 24px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }

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

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

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 20px rgba(15, 110, 63, 0.30);
            cursor: pointer;
            transition: all var(--transition);
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
            z-index: 100;
            border: none;
        }

        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: 0 8px 28px rgba(15, 110, 63, 0.40);
            color: #fff;
        }

        @media (max-width: 520px) {
            .back-top {
                bottom: 16px;
                right: 16px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }

        /* ===== Animations ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }

        .mt-12 {
            margin-top: 12px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-36 {
            margin-top: 36px;
        }

        .gap-8 {
            gap: 8px;
        }
        .gap-16 {
            gap: 16px;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
:root {
  --clr-primary: #e85d04;
  --clr-primary-dark: #d45204;
  --clr-primary-light: #f97316;
  --clr-secondary: #1a1a2e;
  --clr-accent: #fbbf24;
  --clr-bg: #f8f9fc;
  --clr-bg-alt: #ffffff;
  --clr-bg-dark: #0f0f1a;
  --clr-text: #1e293b;
  --clr-text-light: #64748b;
  --clr-text-inverse: #f1f5f9;
  --clr-border: #e2e8f0;
  --clr-border-light: #f1f5f9;
  --clr-shadow: rgba(0, 0, 0, 0.06);
  --clr-shadow-md: rgba(0, 0, 0, 0.1);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px var(--clr-shadow);
  --shadow-md: 0 8px 24px var(--clr-shadow-md);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.12);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --container-max: 1200px;
  --header-height: 76px;
  --space-section: 80px;
  --space-block: 48px;
}
@media (max-width: 768px) {
  :root {
    --space-section: 48px;
    --space-block: 32px;
    --header-height: 64px;
  }
}

/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--clr-text);
  background: var(--clr-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-top: var(--header-height);
}
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
a { color: var(--clr-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--clr-primary-dark); }
a:focus-visible { outline: 3px solid var(--clr-primary-light); outline-offset: 2px; border-radius: 4px; }
button { cursor: pointer; font-family: inherit; border: none; background: none; transition: var(--transition); }
button:focus-visible { outline: 3px solid var(--clr-primary-light); outline-offset: 2px; border-radius: 4px; }
input, textarea { font-family: inherit; font-size: 1rem; transition: var(--transition); }
input:focus, textarea:focus { outline: none; border-color: var(--clr-primary); box-shadow: 0 0 0 3px rgba(232, 93, 4, 0.15); }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--clr-secondary); font-weight: 700; }
h1 { font-size: 2.4rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }
p { margin-bottom: 1em; }
small { font-size: 0.875rem; color: var(--clr-text-light); }
blockquote {
  border-left: 4px solid var(--clr-primary);
  background: rgba(232, 93, 4, 0.05);
  padding: 16px 24px;
  margin: 24px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--clr-text);
  font-style: italic;
}
code { background: #f1f5f9; padding: 2px 8px; border-radius: 4px; font-size: 0.9em; }
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .container { padding: 0 16px; } }

/* ===== Floating Dock Navigation ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  transition: var(--transition);
}
.nav-dock {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--clr-primary);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-logo i { font-size: 1.5rem; color: var(--clr-primary); }
.nav-logo span { background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.nav-links a {
  padding: 8px 18px;
  border-radius: 40px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--clr-text);
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-links a:hover { background: rgba(232, 93, 4, 0.08); color: var(--clr-primary); }
.nav-links a.active { background: var(--clr-primary); color: #fff; box-shadow: 0 4px 14px rgba(232, 93, 4, 0.3); }
.nav-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.nav-search {
  display: flex;
  align-items: center;
  background: var(--clr-border-light);
  border-radius: 40px;
  padding: 4px 4px 4px 16px;
  border: 1px solid transparent;
  transition: var(--transition);
}
.nav-search:focus-within { border-color: var(--clr-primary); background: #fff; box-shadow: 0 0 0 3px rgba(232, 93, 4, 0.1); }
.nav-search input {
  border: none;
  background: transparent;
  padding: 6px 0;
  width: 120px;
  font-size: 0.9rem;
  color: var(--clr-text);
}
.nav-search input::placeholder { color: var(--clr-text-light); }
.nav-search button {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--clr-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  transition: var(--transition);
}
.nav-search button:hover { background: var(--clr-primary-dark); transform: scale(1.05); }
.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 50%; background: var(--clr-border-light); color: var(--clr-text); font-size: 1.2rem; align-items: center; justify-content: center; }
.nav-toggle:hover { background: var(--clr-border); }

@media (max-width: 820px) {
  .nav-links { display: none; position: fixed; top: var(--header-height); left: 0; width: 100%; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); flex-direction: column; padding: 16px 24px 24px; border-bottom: 1px solid var(--clr-border); box-shadow: var(--shadow-md); gap: 4px; }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; text-align: left; padding: 12px 16px; border-radius: var(--radius-sm); }
  .nav-links a.active { background: var(--clr-primary); color: #fff; }
  .nav-toggle { display: flex; }
  .nav-search input { width: 80px; }
}
@media (max-width: 480px) {
  .nav-dock { padding: 0 12px; gap: 8px; }
  .nav-logo { font-size: 1.05rem; }
  .nav-logo i { font-size: 1.2rem; }
  .nav-search input { width: 60px; }
  .nav-search { padding: 2px 2px 2px 10px; }
}

/* ===== Article Hero / Banner ===== */
.article-banner {
  background: linear-gradient(135deg, var(--clr-secondary) 0%, #2d2d44 100%);
  padding: 60px 0 48px;
  position: relative;
  overflow: hidden;
  min-height: 240px;
  display: flex;
  align-items: center;
}
.article-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.12;
  pointer-events: none;
}
.article-banner .container { position: relative; z-index: 1; width: 100%; }
.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.article-breadcrumb a { color: rgba(255,255,255,0.8); text-decoration: none; }
.article-breadcrumb a:hover { color: #fff; }
.article-breadcrumb i { font-size: 0.75rem; color: rgba(255,255,255,0.4); }
.article-banner h1 {
  color: #fff;
  font-size: 2.2rem;
  max-width: 800px;
  line-height: 1.3;
  margin-bottom: 12px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  color: rgba(255,255,255,0.75);
  font-size: 0.95rem;
}
.article-meta-bar .badge {
  background: var(--clr-primary);
  color: #fff;
  padding: 4px 14px;
  border-radius: 40px;
  font-size: 0.8rem;
  font-weight: 600;
}
.article-meta-bar i { margin-right: 6px; opacity: 0.7; }
@media (max-width: 768px) {
  .article-banner { padding: 36px 0 28px; min-height: 180px; }
  .article-banner h1 { font-size: 1.5rem; }
  .article-meta-bar { font-size: 0.85rem; gap: 10px 16px; }
}

/* ===== Main Article Content ===== */
.article-main {
  padding: var(--space-section) 0;
}
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}
.article-content {
  background: var(--clr-bg-alt);
  border-radius: var(--radius-lg);
  padding: 40px 44px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--clr-border-light);
}
.article-content .featured-image {
  width: 100%;
  border-radius: var(--radius-md);
  margin-bottom: 28px;
  aspect-ratio: 16/9;
  object-fit: cover;
  background: var(--clr-border-light);
}
.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--clr-text);
}
.article-body p { margin-bottom: 1.25em; }
.article-body h2, .article-body h3 { margin-top: 1.8em; margin-bottom: 0.6em; color: var(--clr-secondary); }
.article-body ul, .article-body ol { margin-bottom: 1.25em; padding-left: 1.5em; }
.article-body li { margin-bottom: 0.4em; list-style: disc; }
.article-body a { color: var(--clr-primary); text-decoration: underline; text-underline-offset: 3px; }
.article-body a:hover { color: var(--clr-primary-dark); }
.article-body img { border-radius: var(--radius-md); margin: 24px 0; }
.article-body .highlight-box {
  background: linear-gradient(135deg, rgba(232,93,4,0.06), rgba(251,191,36,0.06));
  border: 1px solid rgba(232,93,4,0.15);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 24px 0;
}
.article-body .highlight-box strong { color: var(--clr-primary); }
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--clr-border);
}
.article-tags .tag {
  background: var(--clr-border-light);
  padding: 6px 16px;
  border-radius: 40px;
  font-size: 0.85rem;
  color: var(--clr-text-light);
  transition: var(--transition);
}
.article-tags .tag:hover { background: rgba(232,93,4,0.1); color: var(--clr-primary); }
.article-nav-links {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--clr-border);
  flex-wrap: wrap;
}
.article-nav-links a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 40px;
  background: var(--clr-border-light);
  color: var(--clr-text);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}
.article-nav-links a:hover { background: var(--clr-primary); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(232,93,4,0.25); }

/* ===== Sidebar ===== */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.sidebar-card {
  background: var(--clr-bg-alt);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--clr-border-light);
}
.sidebar-card h3 {
  font-size: 1.05rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--clr-secondary);
}
.sidebar-card h3 i { color: var(--clr-primary); }
.sidebar-list li { margin-bottom: 2px; }
.sidebar-list a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--clr-text);
  font-size: 0.92rem;
  transition: var(--transition);
  border-left: 3px solid transparent;
}
.sidebar-list a:hover { background: rgba(232,93,4,0.05); color: var(--clr-primary); border-left-color: var(--clr-primary); }
.sidebar-list .meta {
  font-size: 0.8rem;
  color: var(--clr-text-light);
  margin-top: 2px;
}
.sidebar-cta {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-light));
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  text-align: center;
  padding: 28px 20px;
}
.sidebar-cta h3 { color: #fff; margin-bottom: 8px; }
.sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 0.9rem; margin-bottom: 16px; }
.sidebar-cta .btn {
  background: #fff;
  color: var(--clr-primary);
  padding: 10px 28px;
  border-radius: 40px;
  font-weight: 700;
  display: inline-block;
  transition: var(--transition);
}
.sidebar-cta .btn:hover { background: var(--clr-accent); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; gap: 32px; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .article-content { padding: 28px 24px; }
}
@media (max-width: 640px) {
  .article-sidebar { grid-template-columns: 1fr; }
  .article-content { padding: 20px 16px; }
  .article-banner h1 { font-size: 1.3rem; }
}

/* ===== Related / Recommended Section ===== */
.related-section {
  background: var(--clr-bg-alt);
  padding: var(--space-section) 0;
  border-top: 1px solid var(--clr-border-light);
}
.related-section .section-header {
  text-align: center;
  margin-bottom: 36px;
}
.related-section .section-header h2 { font-size: 1.6rem; }
.related-section .section-header p { color: var(--clr-text-light); max-width: 500px; margin: 8px auto 0; }
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--clr-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--clr-border-light);
  transition: var(--transition);
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.related-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.related-card .card-body { padding: 18px 20px 20px; }
.related-card .card-body h4 { font-size: 1rem; margin-bottom: 6px; }
.related-card .card-body h4 a { color: var(--clr-secondary); text-decoration: none; }
.related-card .card-body h4 a:hover { color: var(--clr-primary); }
.related-card .card-body p { font-size: 0.88rem; color: var(--clr-text-light); margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .card-meta { font-size: 0.8rem; color: var(--clr-text-light); margin-top: 10px; display: flex; align-items: center; gap: 12px; }
.related-card .card-meta i { margin-right: 4px; opacity: 0.7; }
@media (max-width: 900px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .related-grid { grid-template-columns: 1fr; }
}

/* ===== Not Found State ===== */
.not-found-box {
  text-align: center;
  padding: 80px 20px;
  background: var(--clr-bg-alt);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--clr-border-light);
}
.not-found-box i { font-size: 3.5rem; color: var(--clr-text-light); opacity: 0.4; margin-bottom: 16px; }
.not-found-box h2 { font-size: 1.6rem; margin-bottom: 8px; }
.not-found-box p { color: var(--clr-text-light); margin-bottom: 20px; }
.not-found-box .btn { display: inline-block; padding: 12px 32px; border-radius: 40px; background: var(--clr-primary); color: #fff; font-weight: 600; }
.not-found-box .btn:hover { background: var(--clr-primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,93,4,0.25); }

/* ===== CTA Section ===== */
.cta-section {
  background: linear-gradient(135deg, var(--clr-secondary) 0%, #2d2d44 100%);
  padding: 60px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity: 0.08;
  pointer-events: none;
}
.cta-section .container { position: relative; z-index: 1; }
.cta-section h2 { color: #fff; font-size: 1.8rem; margin-bottom: 12px; }
.cta-section p { color: rgba(255,255,255,0.75); max-width: 540px; margin: 0 auto 24px; font-size: 1.05rem; }
.cta-section .btn-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-section .btn-primary {
  padding: 14px 36px;
  border-radius: 40px;
  background: var(--clr-primary);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}
.cta-section .btn-primary:hover { background: var(--clr-primary-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,93,4,0.3); }
.cta-section .btn-outline {
  padding: 14px 36px;
  border-radius: 40px;
  background: transparent;
  color: #fff;
  font-weight: 600;
  border: 2px solid rgba(255,255,255,0.3);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}
.cta-section .btn-outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; transform: translateY(-2px); }

/* ===== Footer ===== */
.site-footer {
  background: var(--clr-bg-dark);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .nav-logo { color: #fff; margin-bottom: 12px; display: inline-flex; }
.footer-brand .nav-logo span { -webkit-text-fill-color: #fff; background: none; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; font-weight: 600; }
.footer-col a {
  display: block;
  color: rgba(255,255,255,0.55);
  font-size: 0.9rem;
  padding: 5px 0;
  transition: var(--transition);
  text-decoration: none;
}
.footer-col a:hover { color: var(--clr-primary); padding-left: 4px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 0;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.5); text-decoration: none; }
.footer-bottom a:hover { color: var(--clr-primary); }
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== Utilities ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 16px; }
.mt-2 { margin-top: 32px; }
.mb-1 { margin-bottom: 16px; }
.mb-2 { margin-bottom: 32px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* ===== Animation ===== */
.fade-in { animation: fadeInUp 0.6s ease both; }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e85d2c;
            --primary-dark: #cf4a1c;
            --primary-light: #fdf0ea;
            --secondary: #1e2a4a;
            --secondary-light: #2c3e6a;
            --accent: #f7b731;
            --bg-body: #f8f9fb;
            --bg-card: #ffffff;
            --bg-dark: #141d2f;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8888a0;
            --text-inverse: #ffffff;
            --border: #e4e7ed;
            --radius: 18px;
            --radius-sm: 10px;
            --radius-lg: 28px;
            --shadow: 0 8px 36px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 18px 48px rgba(0, 0, 0, 0.10);
            --shadow-dock: 0 6px 30px rgba(0, 0, 0, 0.08);
            --transition: 0.30s cubic-bezier(0.22, 1, 0.36, 1);
            --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --gap: 32px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        ::selection {
            background: var(--primary);
            color: #fff;
        }

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

        /* ===== Header / Dock 导航 ===== */
        .site-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            justify-content: center;
            pointer-events: none;
            padding: 0 24px;
        }

        .nav-dock {
            pointer-events: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1140px;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-radius: 80px;
            padding: 8px 20px 8px 28px;
            box-shadow: var(--shadow-dock);
            border: 1px solid rgba(255, 255, 255, 0.50);
            transition: box-shadow var(--transition);
        }

        .nav-dock:hover {
            box-shadow: 0 10px 36px rgba(0, 0, 0, 0.10);
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--secondary);
            white-space: nowrap;
        }

        .nav-logo i {
            font-size: 26px;
            color: var(--primary);
            transition: transform var(--transition);
        }

        .nav-logo:hover i {
            transform: scale(1.12) rotate(-6deg);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-links a {
            padding: 8px 18px;
            border-radius: 40px;
            font-weight: 500;
            font-size: 15px;
            color: var(--text-secondary);
            transition: background var(--transition), color var(--transition);
            white-space: nowrap;
        }

        .nav-links a:hover,
        .nav-links a:focus-visible {
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(232, 93, 44, 0.30);
        }

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

        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border-radius: 40px;
            padding: 0 6px 0 16px;
            border: 1px solid var(--border);
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(232, 93, 44, 0.12);
        }

        .nav-search input {
            padding: 7px 0;
            min-width: 120px;
            font-size: 14px;
            background: transparent;
            color: var(--text-primary);
        }

        .nav-search input::placeholder {
            color: var(--text-muted);
        }

        .nav-search button {
            padding: 7px 14px;
            border-radius: 40px;
            color: var(--text-muted);
            cursor: pointer;
            transition: color var(--transition), background var(--transition);
        }

        .nav-search button:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-toggle {
            display: none;
            font-size: 22px;
            color: var(--secondary);
            padding: 6px 10px;
            border-radius: 40px;
            cursor: pointer;
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-light);
        }

        /* ===== 移动端导航 ===== */
        @media(max-width:820px) {
            .site-header {
                top: 12px;
                padding: 0 16px;
            }
            .nav-dock {
                padding: 6px 16px 6px 20px;
                border-radius: 50px;
            }
            .nav-links {
                position: fixed;
                top: 80px;
                left: 16px;
                right: 16px;
                background: rgba(255, 255, 255, 0.96);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                border-radius: 24px;
                flex-direction: column;
                padding: 20px 16px;
                gap: 8px;
                box-shadow: 0 20px 48px rgba(0, 0, 0, 0.14);
                opacity: 0;
                visibility: hidden;
                transform: translateY(-12px) scale(0.96);
                transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s;
                border: 1px solid rgba(255, 255, 255, 0.4);
            }
            .nav-links.open {
                opacity: 1;
                visibility: visible;
                transform: translateY(0) scale(1);
            }
            .nav-links a {
                width: 100%;
                text-align: center;
                padding: 12px 18px;
                font-size: 16px;
            }
            .nav-search {
                display: none;
            }
            .nav-actions .nav-search {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .nav-dock .nav-search {
                display: none;
            }
            .nav-actions {
                gap: 6px;
            }
            /* 移动端显示搜索在菜单内 */
            .nav-links .mobile-search {
                display: flex;
                width: 100%;
                margin-top: 6px;
                background: var(--bg-body);
                border-radius: 40px;
                padding: 0 6px 0 16px;
                border: 1px solid var(--border);
            }
            .nav-links .mobile-search input {
                padding: 10px 0;
                background: transparent;
                flex: 1;
                font-size: 15px;
            }
            .nav-links .mobile-search button {
                padding: 10px 16px;
                color: var(--text-muted);
            }
        }

        @media(max-width:520px) {
            .nav-logo span {
                font-size: 16px;
            }
            .nav-logo i {
                font-size: 22px;
            }
            .nav-dock {
                padding: 4px 12px 4px 16px;
            }
            .nav-links {
                top: 72px;
                left: 12px;
                right: 12px;
                padding: 16px 12px;
            }
        }

        /* ===== Banner ===== */
        .category-banner {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 140px 24px 80px;
            background: linear-gradient(138deg, var(--secondary) 0%, #0f1a2e 100%);
            overflow: hidden;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }

        .category-banner .banner-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(232, 93, 44, 0.20) 0%, transparent 70%);
        }

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

        .category-banner h1 {
            font-size: clamp(34px, 6vw, 56px);
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 16px;
        }

        .category-banner h1 i {
            color: var(--accent);
            margin-right: 8px;
        }

        .category-banner p {
            font-size: clamp(16px, 2.2vw, 20px);
            color: rgba(255, 255, 255, 0.78);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .banner-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
        }

        .banner-tags span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
            padding: 8px 20px;
            border-radius: 40px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.88);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .banner-tags span i {
            color: var(--accent);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-header h2 {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .section-header .tagline {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 4px 18px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        /* ===== 步骤板块 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 28px;
            counter-reset: step;
        }

        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            position: relative;
            transition: transform var(--transition), box-shadow var(--transition);
            counter-increment: step;
        }

        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .step-card::before {
            content: counter(step);
            position: absolute;
            top: 18px;
            right: 24px;
            font-size: 48px;
            font-weight: 800;
            color: var(--primary-light);
            line-height: 1;
            transition: color var(--transition);
        }

        .step-card:hover::before {
            color: var(--primary);
        }

        .step-card .step-icon {
            width: 56px;
            height: 56px;
            background: var(--primary-light);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 18px;
            transition: background var(--transition), color var(--transition);
        }

        .step-card:hover .step-icon {
            background: var(--primary);
            color: #fff;
        }

        .step-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
        }

        .step-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
            position: relative;
            z-index: 1;
        }

        /* ===== 内容卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
            gap: 28px;
        }

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

        .content-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .content-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }

        .content-card .card-body {
            padding: 24px 26px 26px;
        }

        .content-card .card-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 2px 14px;
            border-radius: 40px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .content-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 8px;
        }

        .content-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .content-card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 16px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .content-card .card-meta i {
            margin-right: 4px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .faq-item:hover {
            box-shadow: var(--shadow);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 26px;
            font-size: 17px;
            font-weight: 600;
            color: var(--secondary);
            cursor: pointer;
            background: transparent;
            text-align: left;
            gap: 16px;
            transition: background var(--transition);
        }

        .faq-question:hover {
            background: var(--primary-light);
        }

        .faq-question i {
            font-size: 18px;
            color: var(--primary);
            transition: transform 0.35s ease;
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.35s ease;
            padding: 0 26px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 260px;
            padding: 0 26px 22px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(138deg, var(--secondary) 0%, #0f1a2e 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: clamp(28px, 4vw, 40px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.76);
            max-width: 580px;
            margin: 0 auto 32px;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            padding: 16px 42px;
            border-radius: 60px;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 6px 24px rgba(232, 93, 44, 0.35);
        }

        .cta-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(232, 93, 44, 0.40);
        }

        .cta-btn i {
            font-size: 20px;
        }

        .cta-safe {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            margin-top: 28px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
        }

        .cta-safe i {
            margin-right: 6px;
            color: var(--accent);
        }

        /* ===== 统计数字 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 24px;
            text-align: center;
        }

        .stat-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 16px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: transform var(--transition);
        }

        .stat-item:hover {
            transform: translateY(-4px);
        }

        .stat-item .stat-number {
            font-size: 38px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-item .stat-label {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ===== 特色列表 ===== */
        .feature-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .feature-item {
            display: flex;
            gap: 18px;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px 26px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: transform var(--transition), box-shadow var(--transition);
        }

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

        .feature-item .f-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            background: var(--primary-light);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
        }

        .feature-item h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 4px;
        }

        .feature-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== 图文板块 ===== */
        .split-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .split-block .split-img {
            border-radius: var(--radius-lg);
            object-fit: cover;
            width: 100%;
            height: 360px;
            box-shadow: var(--shadow);
        }

        .split-block h3 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .split-block p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .split-block .split-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .split-block .split-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            color: var(--text-secondary);
        }

        .split-block .split-list li i {
            color: var(--primary);
            font-size: 16px;
        }

        @media(max-width:820px) {
            .split-block {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .split-block .split-img {
                height: 240px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.80);
            padding: 56px 0 28px;
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand .nav-logo {
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand .nav-logo i {
            color: var(--accent);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.60);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.60);
            padding: 4px 0;
            transition: color var(--transition), padding-left var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.60);
        }

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

        @media(max-width:820px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1/-1;
            }
        }

        @media(max-width:520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 响应式微调 ===== */
        @media(max-width:600px) {
            .section {
                padding: 48px 0;
            }
            .category-banner {
                min-height: 300px;
                padding: 110px 20px 60px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .feature-list {
                grid-template-columns: 1fr;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 18px;
            }
            .cta-btn {
                width: 100%;
                justify-content: center;
                padding: 16px 24px;
            }
        }

        @media(max-width:400px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .nav-logo span {
                font-size: 14px;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 2px 14px;
            border-radius: 40px;
            font-size: 12px;
            font-weight: 600;
        }