/* roulang page: index */
:root {
            --primary: #2C5F8A;
            --primary-hover: #1E4A6B;
            --primary-light: #E8F0F7;
            --accent: #D4A574;
            --accent-hover: #C08D5A;
            --accent-light: #FBF5EF;
            --bg: #F8FAFC;
            --bg-alt: #EDF2F7;
            --card-bg: #FFFFFF;
            --dark-bg: #1E2A36;
            --dark-bg-alt: #253340;
            --text-primary: #1A202C;
            --text-body: #4A5568;
            --text-muted: #718096;
            --text-light: #CBD5E0;
            --text-on-dark: #E2E8F0;
            --border: #E2E8F0;
            --border-light: #EDF2F7;
            --radius-sm: 6px;
            --radius: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.10);
            --shadow-nav: 0 1px 3px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 36px rgba(0,0,0,0.12);
            --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --transition: 0.2s ease;
            --transition-slow: 0.35s ease;
            --section-spacing: 80px;
            --section-spacing-mobile: 48px;
            --container-max: 1200px;
        }

        *, *::before, *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.65;
            color: var(--text-body);
            background-color: var(--bg);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-hover);
        }
        a:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 2px;
        }

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

        button, input, select, textarea {
            font-family: var(--font-stack);
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--text-primary);
            font-weight: 700;
            line-height: 1.3;
            margin-top: 0;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 16px;
            padding-right: 16px;
        }

        @media (min-width: 640px) {
            .container-custom {
                padding-left: 24px;
                padding-right: 24px;
            }
        }
        @media (min-width: 1024px) {
            .container-custom {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        /* ========== 顶部信息条 ========== */
        .top-bar-strip {
            background: var(--dark-bg);
            color: var(--text-light);
            font-size: 12px;
            height: 40px;
            line-height: 40px;
            position: relative;
            z-index: 1001;
        }
        .top-bar-strip .container-custom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 100%;
        }
        .top-bar-strip .site-hint {
            color: #CBD5E0;
            font-weight: 400;
            letter-spacing: 0.02em;
        }
        .top-bar-strip .top-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .top-bar-strip .top-actions a {
            color: var(--accent);
            font-size: 12px;
            transition: color var(--transition), text-decoration var(--transition);
        }
        .top-bar-strip .top-actions a:hover {
            color: #E8C9A0;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .top-bar-strip .top-divider {
            color: #4A5568;
            font-size: 10px;
        }
        @media (max-width: 639px) {
            .top-bar-strip {
                font-size: 11px;
                height: 36px;
                line-height: 36px;
            }
            .top-bar-strip .top-actions {
                gap: 10px;
            }
            .top-bar-strip .top-actions a {
                font-size: 11px;
            }
        }

        /* ========== 主导航 ========== */
        .main-nav-wrap {
            background: #FFFFFF;
            height: 72px;
            box-shadow: var(--shadow-nav);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition);
        }
        .main-nav-wrap.scrolled {
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        }
        .main-nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 16px;
        }
        @media (min-width: 640px) {
            .main-nav-inner {
                padding: 0 24px;
            }
        }
        @media (min-width: 1024px) {
            .main-nav-inner {
                padding: 0 32px;
            }
        }
        .nav-logo {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary);
            white-space: nowrap;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-logo i {
            color: var(--accent);
            font-size: 22px;
        }
        .nav-logo:hover {
            color: var(--primary-hover);
        }
        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links-desktop li a {
            display: block;
            padding: 10px 16px;
            color: var(--text-body);
            font-size: 15px;
            font-weight: 500;
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-links-desktop li a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-links-desktop li a.active {
            color: var(--primary);
            font-weight: 700;
        }
        .nav-links-desktop li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }
        @media (max-width: 1023px) {
            .nav-links-desktop {
                display: none;
            }
        }

        /* 移动端汉堡菜单 */
        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            color: var(--text-primary);
            font-size: 24px;
            line-height: 1;
        }
        @media (max-width: 1023px) {
            .mobile-nav-toggle {
                display: block;
            }
        }
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 112px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            overflow-y: auto;
            padding: 16px;
            box-shadow: 0 8px 24px rgba(0,0,0,0.12);
        }
        .mobile-nav-panel.open {
            display: block;
        }
        .mobile-nav-panel ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .mobile-nav-panel ul li {
            border-bottom: 1px solid var(--border-light);
        }
        .mobile-nav-panel ul li a {
            display: block;
            padding: 14px 8px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            transition: background var(--transition);
        }
        .mobile-nav-panel ul li a:hover,
        .mobile-nav-panel ul li a.active {
            background: var(--primary-light);
            color: var(--primary);
            border-radius: var(--radius-sm);
        }
        @media (max-width: 639px) {
            .mobile-nav-panel {
                top: 108px;
            }
        }

        /* ========== 按钮系统 ========== */
        .btn {
            display: inline-block;
            font-weight: 600;
            text-align: center;
            border: none;
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            font-size: 15px;
            padding: 12px 28px;
            line-height: 1.4;
            text-decoration: none;
            white-space: nowrap;
        }
        .btn:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--primary);
            color: #FFFFFF;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            color: #FFFFFF;
            box-shadow: 0 4px 14px rgba(44,95,138,0.25);
        }
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 2px 6px rgba(44,95,138,0.2);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary-hover);
            border-color: var(--primary-hover);
        }
        .btn-accent {
            background: var(--accent);
            color: #FFFFFF;
            font-size: 18px;
            padding: 14px 36px;
            border-radius: var(--radius);
        }
        .btn-accent:hover {
            background: var(--accent-hover);
            color: #FFFFFF;
            box-shadow: 0 6px 20px rgba(212,165,116,0.35);
            transform: translateY(-1px);
        }
        .btn-accent:active {
            transform: translateY(0);
            box-shadow: 0 3px 10px rgba(212,165,116,0.25);
        }
        .btn-lg {
            font-size: 17px;
            padding: 14px 34px;
            border-radius: var(--radius);
        }
        .btn-sm {
            font-size: 13px;
            padding: 8px 18px;
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: var(--section-spacing) 0;
        }
        @media (max-width: 1023px) {
            .section {
                padding: var(--section-spacing-mobile) 0;
            }
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--dark-bg);
            color: var(--text-on-dark);
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            position: relative;
            padding-left: 20px;
        }
        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            background: var(--primary);
            border-radius: 2px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            margin-bottom: 32px;
            padding-left: 20px;
            max-width: 640px;
        }
        @media (max-width: 639px) {
            .section-title {
                font-size: 22px;
                padding-left: 16px;
            }
            .section-subtitle {
                font-size: 14px;
                padding-left: 16px;
            }
        }

        /* ========== Hero 区块 ========== */
        .hero-section {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.jpg') center center / cover no-repeat;
            background-attachment: fixed;
            overflow: hidden;
        }
        @media (max-width: 1023px) {
            .hero-section {
                background-attachment: scroll;
                min-height: 440px;
            }
        }
        @media (max-width: 639px) {
            .hero-section {
                min-height: 380px;
            }
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: rgba(0,0,0,0.50);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            color: #FFFFFF;
            padding: 40px 0;
        }
        .hero-badge {
            display: inline-block;
            background: var(--accent);
            color: #FFFFFF;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }
        .hero-title {
            font-size: 36px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
            line-height: 1.25;
            max-width: 680px;
            text-shadow: 0 2px 8px rgba(0,0,0,0.3);
        }
        .hero-desc {
            font-size: 17px;
            color: rgba(255,255,255,0.9);
            margin-bottom: 28px;
            max-width: 560px;
            line-height: 1.7;
            text-shadow: 0 1px 4px rgba(0,0,0,0.2);
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }
        .hero-actions .btn {
            text-shadow: none;
        }
        .hero-stats-mini {
            display: flex;
            gap: 24px;
            margin-top: 20px;
            flex-wrap: wrap;
        }
        .hero-stats-mini .stat-item {
            color: rgba(255,255,255,0.85);
            font-size: 14px;
        }
        .hero-stats-mini .stat-item strong {
            color: var(--accent);
            font-size: 18px;
            font-weight: 700;
        }
        @media (max-width: 639px) {
            .hero-title {
                font-size: 26px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .hero-stats-mini {
                gap: 14px;
            }
        }

        /* ========== 指标看板 ========== */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }
        @media (max-width: 1023px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
                margin-top: -30px;
            }
        }
        @media (max-width: 639px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
                margin-top: -24px;
            }
        }
        .metric-card {
            background: #FFFFFF;
            border-radius: var(--radius);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .metric-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .metric-card .metric-icon {
            font-size: 28px;
            color: var(--accent);
            margin-bottom: 10px;
        }
        .metric-card .metric-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 4px;
            line-height: 1.2;
        }
        .metric-card .metric-label {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
        }

        /* ========== 服务矩阵 ========== */
        .service-matrix {
            display: grid;
            grid-template-columns: 2fr 1fr;
            grid-template-rows: auto auto;
            gap: 20px;
        }
        @media (max-width: 1023px) {
            .service-matrix {
                grid-template-columns: 1fr 1fr;
                grid-template-rows: auto;
            }
        }
        @media (max-width: 639px) {
            .service-matrix {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        .service-card {
            background: #FFFFFF;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .service-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .service-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .service-card:hover .card-img img {
            transform: scale(1.03);
        }
        .service-card .card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .service-card .card-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .service-card .card-desc {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 12px;
            flex: 1;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .service-card .card-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 12px;
            background: var(--accent-light);
            color: var(--accent);
            white-space: nowrap;
        }
        .tag-hot {
            background: #FFF0E8;
            color: #E07040;
        }
        .tag-new {
            background: #E8F8F0;
            color: #2D8A5E;
        }
        .service-card-wide {
            grid-column: 1 / 2;
        }
        @media (max-width: 1023px) {
            .service-card-wide {
                grid-column: 1 / -1;
            }
        }
        .service-row-bottom {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 20px;
        }
        @media (max-width: 1023px) {
            .service-row-bottom {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 639px) {
            .service-row-bottom {
                grid-template-columns: 1fr;
                gap: 16px;
                margin-top: 16px;
            }
        }

        /* ========== 精选分类 ========== */
        .category-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }
        .category-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #FFFFFF;
            border: 1px solid var(--border);
            border-radius: 24px;
            padding: 10px 20px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
        }
        .category-chip:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
            box-shadow: 0 2px 8px rgba(44,95,138,0.1);
            transform: translateY(-1px);
        }
        .category-chip i {
            color: var(--accent);
            font-size: 16px;
        }
        @media (max-width: 639px) {
            .category-chip {
                padding: 8px 16px;
                font-size: 13px;
            }
        }

        /* ========== 平台保障 ========== */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        @media (max-width: 1023px) {
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 639px) {
            .guarantee-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
        }
        .guarantee-item {
            text-align: center;
            padding: 24px 16px;
            background: #FFFFFF;
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .guarantee-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .guarantee-item .g-icon {
            font-size: 36px;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .guarantee-item .g-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .guarantee-item .g-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ========== 结果对比 ========== */
        .compare-wrap {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 20px;
            align-items: stretch;
        }
        @media (max-width: 1023px) {
            .compare-wrap {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        .compare-card {
            background: #FFFFFF;
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
        }
        .compare-card.dim {
            background: #F1F5F9;
            border-color: #E2E8F0;
        }
        .compare-card.highlight {
            background: #FFFFFF;
            border: 2px solid var(--primary);
            box-shadow: 0 4px 20px rgba(44,95,138,0.1);
            position: relative;
        }
        .compare-card .compare-header {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
            text-align: center;
        }
        .compare-card.dim .compare-header {
            color: var(--text-muted);
        }
        .compare-card.highlight .compare-header {
            color: var(--primary);
        }
        .compare-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .compare-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-body);
        }
        .compare-list li:last-child {
            border-bottom: none;
        }
        .compare-list li .icon-check {
            color: #38A169;
            font-size: 16px;
            flex-shrink: 0;
        }
        .compare-list li .icon-x {
            color: #C0C8D0;
            font-size: 16px;
            flex-shrink: 0;
        }
        .compare-vs {
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            color: var(--accent);
            padding: 0 8px;
        }
        @media (max-width: 1023px) {
            .compare-vs {
                padding: 8px 0;
                font-size: 16px;
            }
        }
        .compare-badge {
            position: absolute;
            top: -14px;
            right: 20px;
            background: var(--accent);
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 12px;
            letter-spacing: 0.02em;
        }

        /* ========== 使用指南 ========== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            counter-reset: guide;
        }
        @media (max-width: 1023px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 639px) {
            .guide-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        .guide-step {
            background: #FFFFFF;
            border-radius: var(--radius);
            padding: 28px 22px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            position: relative;
            transition: all var(--transition);
        }
        .guide-step:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .guide-step .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 18px;
            margin-bottom: 14px;
        }
        .guide-step .step-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .guide-step .step-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 12px;
            overflow: hidden;
            background: #FFFFFF;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: 0 2px 8px rgba(0,0,0,0.04);
        }
        .faq-item summary {
            padding: 16px 20px;
            font-weight: 700;
            font-size: 16px;
            color: var(--text-primary);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            gap: 12px;
            user-select: none;
            transition: background var(--transition);
            outline: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::before {
            content: '\f059';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--accent);
            font-size: 16px;
            flex-shrink: 0;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            margin-left: auto;
            font-size: 12px;
            color: var(--text-muted);
            transition: transform var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item[open] summary {
            background: var(--primary-light);
            color: var(--primary);
        }
        .faq-item .faq-answer {
            padding: 0 20px 20px 48px;
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
        }
        @media (max-width: 639px) {
            .faq-item summary {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-item .faq-answer {
                padding: 0 16px 16px 42px;
                font-size: 13px;
            }
        }

        /* ========== CTA 转化表单 ========== */
        .cta-section {
            position: relative;
            background: url('/assets/images/backpic/back-2.jpg') center center / cover no-repeat;
            background-attachment: fixed;
            overflow: hidden;
        }
        @media (max-width: 1023px) {
            .cta-section {
                background-attachment: scroll;
            }
        }
        .cta-overlay {
            position: absolute;
            inset: 0;
            background: rgba(30,42,54,0.82);
            z-index: 1;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 520px;
            margin: 0 auto;
            padding: 48px 20px;
        }
        .cta-title {
            font-size: 28px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
        }
        .cta-subtitle {
            font-size: 15px;
            color: rgba(255,255,255,0.8);
            margin-bottom: 28px;
        }
        .cta-form {
            display: flex;
            flex-direction: column;
            gap: 14px;
            align-items: center;
        }
        .cta-form input {
            width: 100%;
            max-width: 380px;
            padding: 14px 18px;
            border-radius: var(--radius);
            border: 2px solid rgba(255,255,255,0.25);
            background: rgba(255,255,255,0.12);
            color: #FFFFFF;
            font-size: 16px;
            transition: all var(--transition);
            outline: none;
        }
        .cta-form input::placeholder {
            color: rgba(255,255,255,0.55);
        }
        .cta-form input:focus {
            border-color: var(--accent);
            background: rgba(255,255,255,0.18);
            box-shadow: 0 0 0 3px rgba(212,165,116,0.2);
        }
        .cta-form .btn-accent {
            width: 100%;
            max-width: 380px;
            font-size: 17px;
            padding: 14px;
        }
        .cta-privacy {
            font-size: 12px;
            color: rgba(255,255,255,0.6);
            margin-top: 12px;
        }
        .cta-privacy a {
            color: rgba(255,255,255,0.85);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .cta-privacy a:hover {
            color: #FFFFFF;
        }
        @media (max-width: 639px) {
            .cta-title {
                font-size: 22px;
            }
            .cta-content {
                padding: 36px 16px;
            }
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--dark-bg);
            color: var(--text-light);
            padding: 48px 0 24px;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        @media (max-width: 1023px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 639px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
        }
        .footer-desc {
            color: #A0AEC0;
            font-size: 13px;
            line-height: 1.7;
            max-width: 340px;
        }
        .footer-links h4 {
            color: #FFFFFF;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .footer-links ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links ul li {
            margin-bottom: 8px;
        }
        .footer-links ul li a {
            color: #A0AEC0;
            font-size: 13px;
            transition: color var(--transition);
        }
        .footer-links ul li a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 12px;
            color: #718096;
        }
        .footer-bottom .domain-info {
            color: #A0AEC0;
        }

        /* ========== 辅助类 ========== */
        .text-center { text-align: center; }
        .mb-0 { margin-bottom: 0; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .mb-32 { margin-bottom: 32px; }
        .mt-0 { margin-top: 0; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }

        /* ========== 响应式图片可见性 ========== */
        @media (max-width: 639px) {
            .hide-on-mobile { display: none !important; }
        }
        @media (min-width: 640px) {
            .show-on-mobile { display: none !important; }
        }

        /* ========== 动画 ========== */
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(24px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-in {
            animation: fadeInUp 0.5s ease forwards;
        }