/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f1b3d;
            --primary-light: #1a2d6c;
            --primary-dark: #0a1229;
            --accent: #d4a853;
            --accent-light: #e8c06a;
            --accent-dark: #b88d3a;
            --bg-light: #f7f8fc;
            --bg-white: #ffffff;
            --bg-dark: #0b1124;
            --text-dark: #1a1a2e;
            --text-body: #3d405b;
            --text-light: #7a7d9e;
            --text-white: #f0f1f6;
            --border: #e2e4f0;
            --border-light: #f0f1f8;
            --shadow-sm: 0 2px 8px rgba(15, 27, 61, 0.06);
            --shadow-md: 0 8px 30px rgba(15, 27, 61, 0.1);
            --shadow-lg: 0 20px 60px rgba(15, 27, 61, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --header-height: 76px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

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

        /* ===== 标题通用 ===== */
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            background: rgba(212, 168, 83, 0.12);
            padding: 4px 16px;
            border-radius: 50px;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 680px;
            margin: 0 auto 40px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 28px;
            }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: all var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.02em;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(212, 168, 83, 0.3);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(212, 168, 83, 0.2);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--text-white);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-light {
            background: var(--bg-white);
            color: var(--primary);
            border-color: var(--bg-white);
        }
        .btn-light:hover {
            background: var(--bg-light);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(255, 255, 255, 0.2);
        }
        @media (max-width: 520px) {
            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

        /* ===== 徽章 / 标签 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 500;
            background: var(--bg-light);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .badge-accent {
            background: rgba(212, 168, 83, 0.12);
            color: var(--accent-dark);
            border-color: rgba(212, 168, 83, 0.2);
        }
        .badge-primary {
            background: rgba(15, 27, 61, 0.08);
            color: var(--primary);
            border-color: rgba(15, 27, 61, 0.1);
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 27, 61, 0.96);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            height: var(--header-height);
            transition: background var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }
        .logo i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .logo:hover {
            color: var(--accent);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.92rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a i {
            font-size: 0.85rem;
            opacity: 0.6;
        }
        .nav-list a:hover,
        .nav-list a.active {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-list a.active {
            color: var(--accent);
            background: rgba(212, 168, 83, 0.12);
        }
        .nav-cta {
            margin-left: 12px;
            padding: 8px 22px !important;
            background: var(--accent) !important;
            color: var(--primary-dark) !important;
            border-radius: 50px !important;
            font-weight: 600 !important;
        }
        .nav-cta:hover {
            background: var(--accent-light) !important;
            color: var(--primary-dark) !important;
            transform: translateY(-1px);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: transparent;
            border: none;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-white);
            border-radius: 4px;
            transition: all 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);
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(11, 17, 36, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 30px;
                gap: 4px;
                transform: translateY(-110%);
                opacity: 0;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                pointer-events: none;
                max-height: calc(100vh - var(--header-height));
                overflow-y: auto;
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-list a {
                padding: 12px 18px;
                font-size: 1rem;
                width: 100%;
                border-radius: 10px;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                justify-content: center;
            }
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--bg-dark);
            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(11, 17, 36, 0.88) 0%, rgba(15, 27, 61, 0.72) 50%, rgba(11, 17, 36, 0.88) 100%);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 200px;
            background: linear-gradient(to top, var(--bg-light) 0%, transparent 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(212, 168, 83, 0.15);
            border: 1px solid rgba(212, 168, 83, 0.2);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--accent);
            font-weight: 500;
            margin-bottom: 28px;
            backdrop-filter: blur(4px);
        }
        .hero h1 {
            font-size: 3.4rem;
            font-weight: 800;
            color: var(--text-white);
            max-width: 900px;
            margin: 0 auto 20px;
            letter-spacing: -0.03em;
            line-height: 1.2;
        }
        .hero h1 span {
            color: var(--accent);
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 700px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 50px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: -0.02em;
        }
        .hero-stat .num span {
            color: var(--accent);
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 90vh;
                padding: 100px 0 60px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }
            .hero-stat .num {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 核心优势板块 ===== */
        .features {
            padding: 100px 0;
            background: var(--bg-white);
        }
        .features .section-subtitle {
            text-align: center;
        }
        .features .section-label,
        .features .section-title {
            text-align: center;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 20px;
        }
        .feature-card {
            background: var(--bg-light);
            border-radius: var(--radius-md);
            padding: 36px 32px 32px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }
        .feature-card .icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: rgba(212, 168, 83, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent);
            margin-bottom: 20px;
        }
        .feature-card h3 {
            font-size: 1.25rem;
            margin-bottom: 10px;
            color: var(--text-dark);
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .features {
                padding: 60px 0;
            }
        }

        /* ===== 数据统计 ===== */
        .stats-section {
            padding: 80px 0;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 27, 61, 0.88);
        }
        .stats-section .container {
            position: relative;
            z-index: 1;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stat-item .num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: -0.02em;
        }
        .stat-item .desc {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 6px;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .stat-item .num {
                font-size: 2rem;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .stat-item .num {
                font-size: 1.6rem;
            }
        }

        /* ===== 使用流程 ===== */
        .process {
            padding: 100px 0;
            background: var(--bg-light);
        }
        .process .section-label,
        .process .section-title,
        .process .section-subtitle {
            text-align: center;
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 20px;
            position: relative;
        }
        .process-grid::before {
            content: '';
            position: absolute;
            top: 44px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: linear-gradient(to right, var(--accent), var(--border), var(--accent));
            opacity: 0.3;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
            background: var(--bg-white);
            padding: 32px 20px 24px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .process-step:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-3px);
        }
        .process-step .step-num {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 16px;
            border: 3px solid var(--accent);
        }
        .process-step h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--text-dark);
        }
        .process-step p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
        }
        @media (max-width: 1024px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid::before {
                display: none;
            }
        }
        @media (max-width: 640px) {
            .process-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .process {
                padding: 60px 0;
            }
        }

        /* ===== 最新资讯 / CMS 列表 ===== */
        .news-section {
            padding: 100px 0;
            background: var(--bg-white);
        }
        .news-section .section-label,
        .news-section .section-title,
        .news-section .section-subtitle {
            text-align: center;
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 20px;
        }
        .news-card {
            background: var(--bg-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }
        .news-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: var(--border-light);
        }
        .news-card .card-body {
            padding: 24px 24px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .news-card .card-meta .badge {
            font-size: 0.7rem;
            padding: 2px 12px;
        }
        .news-card .card-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 10px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .card-title a {
            color: inherit;
        }
        .news-card .card-title a:hover {
            color: var(--primary-light);
        }
        .news-card .card-excerpt {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-light);
            font-size: 1.05rem;
            background: var(--bg-light);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
        }
        .news-empty i {
            font-size: 2.4rem;
            color: var(--border);
            display: block;
            margin-bottom: 16px;
        }
        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
            .news-section {
                padding: 60px 0;
            }
            .news-card .card-img {
                height: 180px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 100px 0;
            background: var(--bg-light);
        }
        .faq-section .section-label,
        .faq-section .section-title,
        .faq-section .section-subtitle {
            text-align: center;
        }
        .faq-list {
            max-width: 800px;
            margin: 20px auto 0;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--text-dark);
            transition: color var(--transition);
            background: transparent;
            width: 100%;
            text-align: left;
            gap: 16px;
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-item.active .faq-question {
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        @media (max-width: 640px) {
            .faq-section {
                padding: 60px 0;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA 板块 ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 27, 61, 0.85);
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        @media (max-width: 640px) {
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-actions {
                flex-direction: column;
                width: 100%;
            }
            .cta-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            font-size: 1.1rem;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer {
                padding: 40px 0 20px;
            }
        }

        /* ===== 滚动动画辅助 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.show {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 480px) {
            .logo {
                font-size: 1rem;
            }
            .logo i {
                font-size: 1.2rem;
            }
            .hero h1 {
                font-size: 1.4rem;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .container {
                padding: 0 14px;
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a73e8;
            --primary-dark: #1557b0;
            --primary-light: #e8f0fe;
            --primary-gradient: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
            --accent: #ff6d00;
            --accent-light: #fff3e0;
            --success: #0f9d58;
            --info: #00bcd4;
            --dark: #1f2937;
            --darker: #111827;
            --gray-50: #f9fafb;
            --gray-100: #f3f4f6;
            --gray-200: #e5e7eb;
            --gray-300: #d1d5db;
            --gray-400: #9ca3af;
            --gray-500: #6b7280;
            --gray-600: #4b5563;
            --gray-700: #374151;
            --gray-800: #1f2937;
            --white: #ffffff;
            --body-bg: #f0f4f8;
            --text-primary: #1f2937;
            --text-secondary: #4b5563;
            --text-muted: #9ca3af;
            --text-inverse: #ffffff;
            --border-color: #e5e7eb;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 14px 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);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--body-bg);
        }
        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, select { font-family: inherit; font-size: inherit; outline: none; border: none; }
        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: 2.2rem; }
        h2 { font-size: 1.8rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            z-index: 1000;
            box-shadow: 0 1px 8px rgba(0,0,0,0.04);
        }
        .site-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(--primary);
            letter-spacing: -0.3px;
            transition: var(--transition);
        }
        .logo i { font-size: 1.6rem; color: var(--accent); }
        .logo:hover { color: var(--primary-dark); transform: scale(1.02); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--gray-600);
            transition: var(--transition);
            position: relative;
        }
        .nav-list a i { font-size: 0.85rem; }
        .nav-list a:hover,
        .nav-list a.active {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-list a.active { font-weight: 600; }
        .nav-list a.nav-cta {
            background: var(--primary-gradient);
            color: var(--white);
            padding: 8px 24px;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(26,115,232,0.3);
        }
        .nav-list a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26,115,232,0.4);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            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); }

        /* ===== Article Hero / Banner ===== */
        .article-hero {
            padding: 140px 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 {
            position: relative;
            z-index: 2;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
            margin-bottom: 20px;
        }
        .article-hero .breadcrumb a {
            color: rgba(255,255,255,0.8);
        }
        .article-hero .breadcrumb a:hover { color: #fff; }
        .article-hero .breadcrumb i { font-size: 0.7rem; color: rgba(255,255,255,0.5); }
        .article-hero h1 {
            color: var(--white);
            font-size: 2.4rem;
            max-width: 900px;
            line-height: 1.35;
            text-shadow: 0 2px 20px rgba(0,0,0,0.15);
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            color: rgba(255,255,255,0.8);
            font-size: 0.95rem;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i { color: rgba(255,255,255,0.6); }
        .article-meta .category-tag {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(255,255,255,0.2);
            border-radius: 50px;
            font-size: 0.85rem;
            color: #fff;
            backdrop-filter: blur(4px);
        }

        /* ===== Article Main Content ===== */
        .article-main {
            padding: 60px 0 80px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-body {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
        }
        .article-body .content-area {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-body .content-area h2,
        .article-body .content-area h3,
        .article-body .content-area h4 {
            margin-top: 32px;
            margin-bottom: 16px;
            color: var(--dark);
        }
        .article-body .content-area p {
            margin-bottom: 20px;
        }
        .article-body .content-area ul,
        .article-body .content-area ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }
        .article-body .content-area ul li {
            list-style: disc;
            margin-bottom: 8px;
        }
        .article-body .content-area ol li {
            list-style: decimal;
            margin-bottom: 8px;
        }
        .article-body .content-area blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--gray-700);
            font-style: italic;
        }
        .article-body .content-area img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body .content-area a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body .content-area a:hover { color: var(--primary-dark); }
        .not-found {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found i { font-size: 3rem; color: var(--gray-300); margin-bottom: 20px; }
        .not-found h2 { font-size: 1.6rem; color: var(--gray-600); margin-bottom: 12px; }
        .not-found p { color: var(--gray-500); margin-bottom: 24px; }
        .not-found .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary-gradient);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found .btn-home:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,115,232,0.35); }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--dark);
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-card ul li {
            border-bottom: 1px solid var(--gray-100);
            padding: 10px 0;
        }
        .sidebar-card ul li:last-child { border-bottom: none; }
        .sidebar-card ul li a {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--gray-600);
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .sidebar-card ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .sidebar-card ul li a i { font-size: 0.75rem; color: var(--gray-400); }
        .sidebar-cta {
            background: var(--primary-gradient);
            color: var(--white);
            text-align: center;
            padding: 32px 24px;
            border: none;
        }
        .sidebar-cta h3 { color: #fff; margin-bottom: 8px; }
        .sidebar-cta h3 i { color: rgba(255,255,255,0.8); }
        .sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 0.95rem; margin-bottom: 20px; }
        .sidebar-cta .btn-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            background: var(--white);
            color: var(--primary);
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .sidebar-cta .btn-light:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }

        /* ===== Related / CTA Section ===== */
        .section-related {
            padding: 60px 0;
            background: var(--white);
            border-top: 1px solid var(--border-color);
        }
        .section-related h2 {
            text-align: center;
            margin-bottom: 40px;
            font-size: 1.8rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--gray-50);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .related-card .tag {
            display: inline-block;
            padding: 2px 12px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            margin-bottom: 10px;
        }
        .related-card h4 { font-size: 1.05rem; margin-bottom: 8px; }
        .related-card h4 a { color: var(--dark); }
        .related-card h4 a:hover { color: var(--primary); }
        .related-card p { font-size: 0.92rem; color: var(--gray-500); line-height: 1.6; }
        .related-card .meta { display: flex; align-items: center; gap: 12px; margin-top: 12px; font-size: 0.82rem; color: var(--gray-400); }

        /* ===== Section CTA ===== */
        .section-cta {
            padding: 80px 0;
            background: var(--primary-gradient);
            position: relative;
            overflow: hidden;
        }
        .section-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .section-cta .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .section-cta h2 {
            color: var(--white);
            font-size: 2rem;
            margin-bottom: 16px;
            text-shadow: 0 2px 16px rgba(0,0,0,0.1);
        }
        .section-cta p {
            color: rgba(255,255,255,0.85);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .section-cta .cta-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .section-cta .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: var(--white);
            color: var(--primary);
            border-radius: 50px;
            font-size: 1.05rem;
            font-weight: 700;
            transition: var(--transition);
            box-shadow: 0 8px 24px rgba(0,0,0,0.15);
        }
        .section-cta .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(0,0,0,0.2);
        }
        .section-cta .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: transparent;
            color: var(--white);
            border: 2px solid rgba(255,255,255,0.5);
            border-radius: 50px;
            font-size: 1.05rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .section-cta .btn-outline:hover {
            background: rgba(255,255,255,0.15);
            border-color: #fff;
            transform: translateY(-3px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--darker);
            color: var(--gray-300);
            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(255,255,255,0.06);
        }
        .footer-brand .logo {
            color: var(--white);
            font-size: 1.4rem;
            margin-bottom: 16px;
            display: inline-flex;
        }
        .footer-brand .logo i { color: var(--accent); }
        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.7;
            color: var(--gray-400);
            max-width: 320px;
        }
        .footer-col h4 {
            color: var(--white);
            font-size: 1rem;
            margin-bottom: 18px;
            font-weight: 600;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            color: var(--gray-400);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--white);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: var(--gray-500);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom span:last-child {
            color: var(--gray-500);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-list {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                box-shadow: 0 20px 40px rgba(0,0,0,0.1);
                border-bottom: 1px solid var(--border-color);
            }
            .nav-list.open { display: flex; }
            .nav-list a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-toggle { display: flex; }
            .article-hero { padding: 110px 0 40px; }
            .article-hero h1 { font-size: 1.7rem; }
            .article-body { padding: 28px 20px; }
            .article-meta { gap: 12px; font-size: 0.85rem; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section-cta h2 { font-size: 1.5rem; }
            .section-cta .cta-group { flex-direction: column; align-items: center; }
            .logo { font-size: 1.15rem; }
            .logo i { font-size: 1.3rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 1.4rem; }
            .article-body { padding: 20px 16px; }
            .article-body .content-area { font-size: 0.98rem; }
            .section-cta { padding: 50px 0; }
            .sidebar-card { padding: 20px 16px; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0d2137;
            --primary-light: #1a3a5c;
            --primary-dark: #081525;
            --secondary: #1a73e8;
            --secondary-hover: #1557b0;
            --accent: #f5b342;
            --accent-hover: #e09e2e;
            --bg: #f7f9fc;
            --bg-card: #ffffff;
            --bg-dark: #0d2137;
            --bg-section: #f0f4fa;
            --text: #1a1a2e;
            --text-light: #6b7280;
            --text-muted: #9ca3af;
            --text-white: #ffffff;
            --border: #e5e7eb;
            --border-light: #f0f0f0;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
            --transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --max-width: 1200px;
            --header-height: 72px;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2.2rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.15rem;
        }
        p {
            color: var(--text-light);
            line-height: 1.8;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(13, 33, 55, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            height: var(--header-height);
            transition: var(--transition);
        }
        .site-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(--text-white);
            letter-spacing: 0.5px;
            transition: var(--transition);
        }
        .logo i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .logo:hover {
            color: var(--accent);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.78);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a i {
            font-size: 0.9rem;
        }
        .nav-list a:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-list a.active {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.12);
        }
        .nav-list a.nav-cta {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            margin-left: 8px;
        }
        .nav-list a.nav-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(245, 179, 66, 0.35);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: transparent;
            border: none;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-white);
            border-radius: 4px;
            transition: var(--transition);
        }

        /* ===== Hero 区域 ===== */
        .hero-section {
            position: relative;
            padding: 140px 0 100px;
            min-height: 580px;
            display: flex;
            align-items: center;
            background: var(--primary-dark);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 1;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 33, 55, 0.88) 0%, rgba(13, 33, 55, 0.70) 100%);
            z-index: 2;
        }
        .hero-section .container {
            position: relative;
            z-index: 3;
            text-align: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(245, 179, 66, 0.18);
            color: var(--accent);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            border: 1px solid rgba(245, 179, 66, 0.25);
            margin-bottom: 24px;
        }
        .hero-section h1 {
            font-size: 3.2rem;
            color: var(--text-white);
            max-width: 800px;
            margin: 0 auto 20px;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .hero-section h1 span {
            color: var(--accent);
        }
        .hero-sub {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.72);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(245, 179, 66, 0.30);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(245, 179, 66, 0.40);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.10);
            color: var(--text-white);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.20);
            transition: var(--transition);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.18);
            transform: translateY(-2px);
        }

        /* ===== 通用板块标题 ===== */
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text);
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 580px;
            margin: 0 auto;
        }
        .section-header .section-tag {
            display: inline-block;
            background: rgba(26, 115, 232, 0.08);
            color: var(--secondary);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        /* ===== 信任指标 ===== */
        .trust-section {
            padding: 60px 0;
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
        }
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .trust-item {
            padding: 20px 12px;
        }
        .trust-item .num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .trust-item .num span {
            color: var(--secondary);
        }
        .trust-item .label {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-top: 6px;
            font-weight: 500;
        }
        .trust-divider {
            width: 1px;
            height: 60px;
            background: var(--border);
            align-self: center;
        }

        /* ===== 核心指南卡片 ===== */
        .guide-section {
            padding: 80px 0;
            background: var(--bg);
        }
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            text-align: center;
        }
        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(26, 115, 232, 0.15);
        }
        .guide-card .icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            background: rgba(26, 115, 232, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.8rem;
            color: var(--secondary);
            transition: var(--transition);
        }
        .guide-card:hover .icon-wrap {
            background: rgba(26, 115, 232, 0.14);
            transform: scale(1.05);
        }
        .guide-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .guide-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        .guide-card .card-tag {
            display: inline-block;
            margin-top: 14px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--secondary);
            background: rgba(26, 115, 232, 0.06);
            padding: 2px 14px;
            border-radius: 50px;
        }

        /* ===== 使用流程 ===== */
        .steps-section {
            padding: 80px 0;
            background: var(--bg-card);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 16%;
            right: 16%;
            height: 2px;
            background: linear-gradient(to right, var(--secondary), var(--accent));
            z-index: 0;
        }
        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-white);
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            border: 4px solid var(--bg-card);
            box-shadow: 0 0 0 2px var(--secondary);
        }
        .step-item h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .step-item p {
            font-size: 0.92rem;
            color: var(--text-light);
            max-width: 280px;
            margin: 0 auto;
        }

        /* ===== 适用场景 ===== */
        .scenario-section {
            padding: 80px 0;
            background: var(--bg-section);
        }
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .scenario-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .scenario-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .scenario-card .scenario-img {
            height: 200px;
            background: var(--primary-light);
            overflow: hidden;
        }
        .scenario-card .scenario-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .scenario-card:hover .scenario-img img {
            transform: scale(1.04);
        }
        .scenario-card .scenario-body {
            padding: 24px 22px 26px;
        }
        .scenario-card .scenario-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .scenario-card .scenario-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        .scenario-card .scenario-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(245, 179, 66, 0.10);
            padding: 2px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
            background: var(--bg-card);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(26, 115, 232, 0.15);
        }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            gap: 16px;
            transition: var(--transition);
            background: transparent;
            width: 100%;
            text-align: left;
        }
        .faq-question i {
            color: var(--secondary);
            font-size: 0.9rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.8;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-item .faq-question .q-icon {
            color: var(--accent);
            margin-right: 10px;
            font-weight: 700;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--primary);
            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;
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            color: var(--text-white);
            margin-bottom: 16px;
            font-weight: 800;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.70);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-primary {
            font-size: 1.05rem;
            padding: 16px 44px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            font-size: 1.25rem;
            margin-bottom: 14px;
            display: inline-flex;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            max-width: 300px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            padding: 20px 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.40);
        }
        .footer-bottom span:last-child {
            color: rgba(255, 255, 255, 0.30);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .trust-divider {
                display: none;
            }
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 28px;
            }
            .steps-grid::before {
                top: 44px;
                left: 10%;
                right: 10%;
            }
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .hero-section h1 {
                font-size: 2.6rem;
            }
        }
        @media (max-width: 768px) {
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(13, 33, 55, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 8px;
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                box-shadow: var(--shadow-lg);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-list a {
                padding: 12px 18px;
                font-size: 1rem;
                width: 100%;
            }
            .nav-list a.nav-cta {
                margin-left: 0;
                margin-top: 6px;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
            }
            .hero-section {
                padding: 110px 0 70px;
                min-height: auto;
            }
            .hero-section h1 {
                font-size: 2rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
            .guide-grid {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }
            .guide-card {
                padding: 24px 18px 22px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .steps-grid::before {
                display: none;
            }
            .step-item {
                display: flex;
                align-items: center;
                gap: 20px;
                text-align: left;
            }
            .step-num {
                margin: 0;
                flex-shrink: 0;
            }
            .step-item p {
                max-width: none;
                margin: 0;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .trust-item .num {
                font-size: 2rem;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-section h1 {
                font-size: 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .trust-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .trust-item .num {
                font-size: 1.7rem;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .faq-question {
                font-size: 0.92rem;
                padding: 14px 18px;
            }
            .faq-answer {
                padding: 0 18px 14px;
                font-size: 0.85rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.2rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .step-item {
                flex-direction: column;
                text-align: center;
                gap: 12px;
            }
            .step-num {
                margin: 0 auto;
            }
            .step-item p {
                max-width: 100%;
            }
        }