/* roulang page: index */
/* ============ 设计变量 ============ */
        :root {
            --primary: #1a56db;
            --primary-dark: #143f9e;
            --primary-light: #3b82f6;
            --primary-soft: #e8effc;
            --secondary: #0d9488;
            --secondary-soft: #e6f7f5;
            --accent: #f59e0b;
            --accent-soft: #fef3c7;
            --bg: #f5f7fb;
            --bg-white: #ffffff;
            --bg-dark: #0b1220;
            --bg-dark-soft: #111c33;
            --text: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --text-on-dark: #e2e8f0;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-xl: 24px;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-full: 999px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.07);
            --shadow-lg: 0 12px 48px rgba(15, 23, 42, 0.11);
            --shadow-xl: 0 24px 80px rgba(15, 23, 42, 0.15);
            --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        /* ============ 导航 ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--text);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            font-weight: 700;
            flex-shrink: 0;
        }

        .logo-icon svg {
            width: 20px;
            height: 20px;
            fill: #fff;
        }

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

        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            border-radius: var(--radius-full);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-list a:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }

        .nav-list a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 12px rgba(26, 86, 219, 0.3);
        }

        .nav-list a.active:hover {
            color: #fff;
            background: var(--primary-dark);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            background: var(--bg-white);
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
            transition: all var(--transition-fast);
        }

        .nav-toggle:hover {
            border-color: var(--primary);
            background: var(--primary-soft);
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--text);
            transition: all var(--transition-fast);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            padding: 16px 24px 24px;
            z-index: 99;
            transform: translateY(-8px);
            opacity: 0;
            pointer-events: none;
            transition: all var(--transition);
        }

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

        .mobile-menu a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 14px 16px;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: all var(--transition-fast);
        }

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

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

        /* ============ Hero 首屏 ============ */
        .hero {
            padding: calc(var(--nav-height) + 60px) 0 80px;
            position: relative;
            overflow: hidden;
            background: linear-gradient(180deg, #eef3fc 0%, var(--bg) 100%);
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -180px;
            right: -120px;
            width: 520px;
            height: 520px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(26, 86, 219, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -140px;
            left: -100px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(13, 148, 136, 0.07) 0%, transparent 70%);
            pointer-events: none;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: var(--radius-full);
            background: var(--bg-white);
            border: 1px solid var(--border);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            box-shadow: var(--shadow-sm);
            margin-bottom: 28px;
        }

        .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--secondary);
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(0.8); }
        }

        .hero-content {
            max-width: 780px;
            margin-bottom: 52px;
        }

        .hero h1 {
            font-size: 2.6rem;
            font-weight: 900;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--text);
            margin-bottom: 20px;
        }

        .hero h1 .highlight {
            color: var(--primary);
            position: relative;
            white-space: nowrap;
        }

        .hero h1 .highlight::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            right: 0;
            height: 6px;
            background: rgba(26, 86, 219, 0.13);
            border-radius: 3px;
            z-index: -1;
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 620px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: var(--radius-full);
            font-size: 0.95rem;
            font-weight: 600;
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .btn svg {
            width: 18px;
            height: 18px;
            fill: currentColor;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 20px rgba(26, 86, 219, 0.35);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 8px 28px rgba(26, 86, 219, 0.45);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(26, 86, 219, 0.3);
        }

        .btn-outline {
            background: var(--bg-white);
            color: var(--text);
            border: 1.5px solid var(--border);
        }

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

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

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 52px;
        }

        .hero-stat {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px 24px;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .hero-stat:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .hero-stat-value {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .hero-stat-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 功能预览面板 */
        .hero-preview {
            background: var(--bg-dark);
            border-radius: var(--radius-xl);
            padding: 28px;
            box-shadow: var(--shadow-xl);
            position: relative;
            overflow: hidden;
        }

        .hero-preview::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
        }

        .preview-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 22px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .preview-title {
            color: var(--text-on-dark);
            font-weight: 700;
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .preview-title .status {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #22c55e;
            animation: pulse-dot 2s ease-in-out infinite;
        }

        .preview-tabs {
            display: flex;
            gap: 6px;
        }

        .preview-tab {
            padding: 6px 16px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-light);
            background: rgba(255, 255, 255, 0.06);
            transition: all var(--transition-fast);
        }

        .preview-tab.active {
            color: #fff;
            background: var(--primary);
        }

        .preview-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 14px;
        }

        .preview-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 18px;
            transition: all var(--transition);
        }

        .preview-card:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.2);
        }

        .preview-card-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 10px;
        }

        .preview-card-title {
            color: var(--text-on-dark);
            font-weight: 600;
            font-size: 0.85rem;
        }

        .preview-tag {
            padding: 3px 10px;
            border-radius: var(--radius-full);
            font-size: 0.72rem;
            font-weight: 700;
        }

        .preview-tag.success {
            background: rgba(34, 197, 94, 0.18);
            color: #4ade80;
        }

        .preview-tag.pending {
            background: rgba(245, 158, 11, 0.18);
            color: #fbbf24;
        }

        .preview-tag.processing {
            background: rgba(59, 130, 246, 0.18);
            color: #60a5fa;
        }

        .preview-card-bar {
            height: 6px;
            border-radius: 3px;
            background: rgba(255, 255, 255, 0.1);
            overflow: hidden;
            margin-top: 10px;
        }

        .preview-card-bar-fill {
            height: 100%;
            border-radius: 3px;
            background: linear-gradient(90deg, var(--primary-light), var(--secondary));
            transition: width var(--transition-slow);
        }

        .preview-card-meta {
            display: flex;
            justify-content: space-between;
            margin-top: 8px;
            font-size: 0.72rem;
            color: var(--text-light);
        }

        /* ============ 板块通用样式 ============ */
        .section {
            padding: 80px 0;
        }

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

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

        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        .section-tag.blue {
            background: var(--primary-soft);
            color: var(--primary);
        }

        .section-tag.green {
            background: var(--secondary-soft);
            color: var(--secondary);
        }

        .section-tag.amber {
            background: var(--accent-soft);
            color: #b45309;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.015em;
            color: var(--text);
            margin-bottom: 16px;
        }

        .section-dark .section-title {
            color: #fff;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.8;
        }

        .section-dark .section-desc {
            color: var(--text-light);
        }

        /* ============ 卡片网格 ============ */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 24px;
        }

        .card-grid.three {
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        }

        .card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

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

        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            font-size: 1.4rem;
        }

        .card-icon.blue {
            background: var(--primary-soft);
            color: var(--primary);
        }

        .card-icon.green {
            background: var(--secondary-soft);
            color: var(--secondary);
        }

        .card-icon.amber {
            background: var(--accent-soft);
            color: #b45309;
        }

        .card-icon.red {
            background: #fee2e2;
            color: #dc2626;
        }

        .card-icon svg {
            width: 26px;
            height: 26px;
            fill: currentColor;
        }

        .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .card-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.75;
        }

        /* ============ 痛点板块 ============ */
        .pain-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
        }

        .pain-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 20px 24px;
            border-radius: var(--radius-lg);
            background: #fef2f2;
            border: 1px solid #fecaca;
            transition: all var(--transition);
        }

        .pain-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .pain-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #dc2626;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            flex-shrink: 0;
            font-weight: 800;
        }

        .pain-text {
            flex: 1;
        }

        .pain-title {
            font-weight: 700;
            color: #991b1b;
            font-size: 0.95rem;
            margin-bottom: 4px;
        }

        .pain-desc {
            font-size: 0.85rem;
            color: #b91c1c;
            line-height: 1.6;
        }

        /* ============ 数据统计带 ============ */
        .stats-band {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2744 100%);
            padding: 56px 0;
            position: relative;
            overflow: hidden;
        }

        .stats-band::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 20%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(26, 86, 219, 0.25) 0%, transparent 70%);
        }

        .stats-band::after {
            content: '';
            position: absolute;
            bottom: -40%;
            right: 15%;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(13, 148, 136, 0.2) 0%, transparent 70%);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 28px;
            position: relative;
            z-index: 1;
        }

        .stat-block {
            text-align: center;
            padding: 20px;
        }

        .stat-number {
            font-size: 2.6rem;
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .stat-number span {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary-light);
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 6px;
        }

        /* ============ 场景板块 ============ */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
        }

        .scene-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            text-align: center;
        }

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

        .scene-emoji {
            font-size: 2.2rem;
            display: block;
            margin-bottom: 14px;
        }

        .scene-name {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text);
            margin-bottom: 8px;
        }

        .scene-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ============ 流程步骤 ============ */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 24px;
            counter-reset: step;
        }

        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            position: relative;
            transition: all var(--transition);
            counter-increment: step;
        }

        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            box-shadow: 0 6px 16px rgba(26, 86, 219, 0.3);
        }

        .step-title {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text);
            margin-bottom: 8px;
        }

        .step-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ============ FAQ ============ */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }

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

        .faq-item.open {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text);
            transition: color var(--transition-fast);
            text-align: left;
            width: 100%;
            background: none;
        }

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

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-soft);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 700;
            flex-shrink: 0;
            transition: transform var(--transition-fast);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* ============ CTA ============ */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 50%, var(--bg-dark) 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -5%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(13, 148, 136, 0.15) 0%, transparent 70%);
        }

        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 2.1rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.015em;
        }

        .cta-content p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.78);
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
        }

        .btn-white:hover {
            background: #f0f4ff;
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 32px rgba(0, 0, 0, 0.25);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.3);
            backdrop-filter: blur(10px);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: rgba(255, 255, 255, 0.5);
            color: #fff;
            transform: translateY(-2px);
        }

        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 32px auto 0;
            flex-wrap: wrap;
            justify-content: center;
        }

        .cta-input {
            flex: 1;
            min-width: 220px;
            padding: 14px 22px;
            border-radius: var(--radius-full);
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 0.9rem;
            backdrop-filter: blur(10px);
            transition: all var(--transition);
        }

        .cta-input::placeholder {
            color: rgba(255, 255, 255, 0.55);
        }

        .cta-input:focus {
            outline: none;
            border-color: rgba(255, 255, 255, 0.55);
            background: rgba(255, 255, 255, 0.16);
        }

        .cta-note {
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 14px;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--bg-dark);
            padding: 56px 0 28px;
            color: var(--text-light);
        }

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

        .footer-brand {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }

        .footer-brand .logo-icon {
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
        }

        .footer-desc {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul a {
            font-size: 0.82rem;
            color: var(--text-light);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.4);
            line-height: 1.7;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 2.2rem;
            }

            .section-title {
                font-size: 1.7rem;
            }

            .cta-content h2 {
                font-size: 1.8rem;
            }

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

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

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

            .nav-list {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-menu {
                display: block;
            }

            .hero {
                padding: calc(var(--nav-height) + 40px) 0 48px;
            }

            .hero h1 {
                font-size: 1.75rem;
            }

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

            .hero-stats {
                gap: 10px;
                margin-bottom: 36px;
            }

            .hero-stat {
                padding: 12px 16px;
                flex: 1;
                min-width: 140px;
            }

            .hero-stat-value {
                font-size: 1.2rem;
            }

            .hero-preview {
                padding: 18px;
                border-radius: var(--radius-lg);
            }

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

            .section {
                padding: 52px 0;
            }

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

            .section-title {
                font-size: 1.5rem;
            }

            .card-grid,
            .card-grid.three,
            .pain-list,
            .scene-grid,
            .steps-grid {
                grid-template-columns: 1fr;
            }

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

            .stat-number {
                font-size: 2rem;
            }

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

            .cta-form {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-input {
                min-width: 0;
                width: 100%;
            }

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

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

            .hero h1 {
                font-size: 1.45rem;
            }

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

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

            .hero-stats {
                flex-direction: column;
            }

            .hero-stat {
                width: 100%;
            }

            .section-title {
                font-size: 1.3rem;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-number {
                font-size: 1.6rem;
            }

            .stat-number span {
                font-size: 1rem;
            }

            .faq-question {
                padding: 16px 18px;
                font-size: 0.88rem;
            }

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

            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }