:root {
            --bg: #ffffff;
            --bg-soft: #f7faff;
            --bg-section: #f0f5ff;
            --surface: #ffffff;
            --border: #e4eaf5;
            --border-light: #eef2fa;
            --primary: #5b6cf0;
            --primary-hover: #4a5be0;
            --primary-soft: rgba(91, 108, 240, 0.1);
            --mint: #2dd4a8;
            --mint-soft: rgba(45, 212, 168, 0.1);
            --coral: #f07068;
            --coral-soft: rgba(240, 112, 104, 0.1);
            --amber: #f0a030;
            --amber-soft: rgba(240, 160, 48, 0.1);
            --text: #1a1e2e;
            --text-secondary: #5a6178;
            --text-muted: #9aa0b4;
            --shadow-sm: 0 1px 3px rgba(26, 30, 46, 0.04), 0 1px 2px rgba(26, 30, 46, 0.02);
            --shadow-md: 0 4px 16px rgba(26, 30, 46, 0.06), 0 1px 4px rgba(26, 30, 46, 0.03);
            --shadow-lg: 0 12px 40px rgba(26, 30, 46, 0.08), 0 2px 8px rgba(26, 30, 46, 0.03);
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-display: 'Plus Jakarta Sans', sans-serif;
            --font-body: 'DM Sans', sans-serif;
        }

        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-body);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            overflow-x: hidden;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        ul {
            list-style: none;
        }

        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }

        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }

        .logo {
            font-family: var(--font-display);
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.03em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .logo-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--mint);
        }

        .site-nav ul {
            display: flex;
            gap: 0.25rem;
        }

        .site-nav a {
            font-family: var(--font-display);
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 0.5rem 1rem;
            border-radius: 10px;
            transition: all 0.2s ease;
        }

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

        .site-nav a[aria-current="page"] {
            color: var(--primary);
            background: var(--primary-soft);
            font-weight: 600;
        }

        main {
            position: relative;
        }

        .hero {
            padding: 6rem 0 5rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -10%;
            left: 50%;
            transform: translateX(-50%);
            width: 900px;
            height: 900px;
            background:
                radial-gradient(ellipse at 40% 40%, rgba(91, 108, 240, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 60% 55%, rgba(45, 212, 168, 0.06) 0%, transparent 45%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 1;
        }

        .hero h1 {
            font-family: var(--font-display);
            font-size: clamp(3.8rem, 8vw, 6.5rem);
            font-weight: 800;
            line-height: 1.05;
            letter-spacing: -0.04em;
            color: var(--text);
            margin-bottom: 0.75rem;
            opacity: 0;
            animation: fadeUp 0.6s ease 0.1s forwards;
        }

        .hero h1 .gradient-text {
            background: linear-gradient(135deg, var(--primary) 0%, var(--mint) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-tagline {
            font-family: var(--font-display);
            font-size: 1.15rem;
            font-weight: 500;
            color: var(--text-muted);
            letter-spacing: 0.35em;
            margin-bottom: 1.75rem;
            opacity: 0;
            animation: fadeUp 0.6s ease 0.2s forwards;
        }

        .hero-description {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 2.5rem;
            line-height: 1.8;
            opacity: 0;
            animation: fadeUp 0.6s ease 0.3s forwards;
        }

        .hero-actions {
            display: flex;
            gap: 0.75rem;
            justify-content: center;
            flex-wrap: wrap;
            opacity: 0;
            animation: fadeUp 0.6s ease 0.4s forwards;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.6rem;
            border-radius: 12px;
            font-family: var(--font-display);
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            border: none;
            transition: all 0.25s ease;
            letter-spacing: -0.01em;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 12px rgba(91, 108, 240, 0.3);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: 0 6px 24px rgba(91, 108, 240, 0.35);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: var(--bg);
            color: var(--text);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .hero-visual {
            margin-top: 4rem;
            position: relative;
            z-index: 1;
            opacity: 0;
            animation: fadeUp 0.8s ease 0.5s forwards;
        }

        .hero-browser {
            max-width: 820px;
            margin: 0 auto;
            background: var(--bg-soft);
            border: 1px solid var(--border);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .browser-bar {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.9rem 1.25rem;
            background: var(--bg);
            border-bottom: 1px solid var(--border-light);
        }

        .browser-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
        }

        .browser-dot:nth-child(1) {
            background: #f07068;
        }
        .browser-dot:nth-child(2) {
            background: #f0a030;
        }
        .browser-dot:nth-child(3) {
            background: #2dd4a8;
        }

        .browser-url {
            flex: 1;
            margin-left: 0.75rem;
            padding: 0.35rem 0.85rem;
            background: var(--bg-section);
            border-radius: 8px;
            font-size: 0.75rem;
            color: var(--text-muted);
            font-family: 'DM Mono', monospace;
        }

        .browser-body {
            padding: 2rem;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1rem;
            min-height: 220px;
        }

        .browser-card {
            background: var(--bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 1.25rem;
            transition: transform 0.3s ease;
        }

        .browser-card:hover {
            transform: translateY(-3px);
        }

        .browser-card-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 0.85rem;
        }

        .browser-card-icon.blue {
            background: var(--primary-soft);
        }
        .browser-card-icon.green {
            background: var(--mint-soft);
        }
        .browser-card-icon.coral {
            background: var(--coral-soft);
        }

        .browser-card h4 {
            font-family: var(--font-display);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 0.35rem;
            color: var(--text);
        }

        .browser-card p {
            font-size: 0.75rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        .stats-section {
            padding: 4rem 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .stat-card {
            text-align: center;
            padding: 2rem 1.5rem;
            background: var(--bg-soft);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            transition: all 0.3s ease;
        }

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

        .stat-value {
            font-family: var(--font-display);
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.1;
            letter-spacing: -0.03em;
            margin-bottom: 0.35rem;
        }

        .stat-card:nth-child(1) .stat-value {
            color: var(--primary);
        }
        .stat-card:nth-child(2) .stat-value {
            color: var(--mint);
        }
        .stat-card:nth-child(3) .stat-value {
            color: var(--coral);
        }

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

        .features {
            padding: 5rem 0 6rem;
        }

        .section-header {
            text-align: center;
            margin-bottom: 3.5rem;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            padding: 0.3rem 0.85rem;
            background: var(--primary-soft);
            border-radius: 100px;
            font-family: var(--font-display);
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 0.04em;
            margin-bottom: 1rem;
        }

        .section-header h2 {
            font-family: var(--font-display);
            font-size: clamp(2rem, 4vw, 2.8rem);
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.2;
            color: var(--text);
            margin-bottom: 0.75rem;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 480px;
            margin: 0 auto;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.25rem;
        }

        .feature-card {
            position: relative;
            padding: 2rem;
            background: var(--bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            transition: all 0.35s ease;
            overflow: hidden;
        }

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

        .feature-icon {
            width: 50px;
            height: 50px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.25rem;
        }

        .feature-icon svg {
            width: 24px;
            height: 24px;
        }

        .feature-card:nth-child(1) .feature-icon {
            background: var(--primary-soft);
        }
        .feature-card:nth-child(1) .feature-icon svg {
            color: var(--primary);
        }
        .feature-card:nth-child(2) .feature-icon {
            background: var(--mint-soft);
        }
        .feature-card:nth-child(2) .feature-icon svg {
            color: var(--mint);
        }
        .feature-card:nth-child(3) .feature-icon {
            background: var(--amber-soft);
        }
        .feature-card:nth-child(3) .feature-icon svg {
            color: var(--amber);
        }
        .feature-card:nth-child(4) .feature-icon {
            background: var(--coral-soft);
        }
        .feature-card:nth-child(4) .feature-icon svg {
            color: var(--coral);
        }

        .feature-card h3 {
            font-family: var(--font-display);
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--text);
            letter-spacing: -0.01em;
        }

        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.75;
        }

        .feature-tag {
            display: inline-block;
            margin-top: 1rem;
            padding: 0.2rem 0.65rem;
            border-radius: 6px;
            font-size: 0.72rem;
            font-weight: 500;
            font-family: var(--font-display);
            letter-spacing: 0.02em;
        }

        .feature-card:nth-child(1) .feature-tag {
            background: var(--primary-soft);
            color: var(--primary);
        }
        .feature-card:nth-child(2) .feature-tag {
            background: var(--mint-soft);
            color: #1aab86;
        }
        .feature-card:nth-child(3) .feature-tag {
            background: var(--amber-soft);
            color: #c88420;
        }
        .feature-card:nth-child(4) .feature-tag {
            background: var(--coral-soft);
            color: var(--coral);
        }

        .cta-section {
            padding: 2rem 0 6rem;
        }

        .cta-card {
            position: relative;
            padding: 4rem 3rem;
            background: linear-gradient(135deg, var(--primary) 0%, #7b87f5 50%, var(--mint) 100%);
            border-radius: var(--radius-xl);
            text-align: center;
            overflow: hidden;
            color: #fff;
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-card::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-card h2 {
            font-family: var(--font-display);
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: 0.75rem;
            position: relative;
            z-index: 1;
        }

        .cta-card p {
            font-size: 1.05rem;
            opacity: 0.9;
            margin-bottom: 2rem;
            max-width: 460px;
            margin-left: auto;
            margin-right: auto;
            position: relative;
            z-index: 1;
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
            position: relative;
            z-index: 1;
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
        }

        footer {
            padding: 2.5rem 0;
            border-top: 1px solid var(--border-light);
        }

        footer .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .footer-left {
            display: flex;
            align-items: center;
            gap: 1.75rem;
        }

        .footer-logo {
            font-family: var(--font-display);
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--primary);
        }

        .footer-copy {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .footer-links {
            display: flex;
            gap: 1.75rem;
        }

        .footer-links a {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-weight: 500;
            transition: color 0.2s ease;
        }

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

        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ========== 新增区域样式（复用CSS变量，保持设计一致性）========== */

        /* SEO正文区 */
        .seo-content {
            padding: 5rem 0 4rem;
        }
        .seo-content .section-header {
            margin-bottom: 2.5rem;
        }
        .seo-prose {
            max-width: 820px;
            margin: 0 auto;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 2;
        }
        .seo-prose h3 {
            font-family: var(--font-display);
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            margin: 2.5rem 0 1rem;
            letter-spacing: -0.01em;
        }
        .seo-prose h3:first-child {
            margin-top: 0;
        }
        .seo-prose p {
            margin-bottom: 1.25rem;
        }
        .seo-prose strong {
            color: var(--text);
            font-weight: 600;
        }
        .seo-highlight {
            background: var(--bg-section);
            border-left: 3px solid var(--primary);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            padding: 1.25rem 1.5rem;
            margin: 2rem 0;
            font-family: var(--font-display);
            font-weight: 600;
            color: var(--text);
            font-size: 0.95rem;
            letter-spacing: -0.01em;
        }

        /* 对比表格 */
        .compare-section {
            padding: 2rem 0 5rem;
        }
        .compare-table-wrap {
            max-width: 820px;
            margin: 0 auto;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
            background: var(--surface);
        }
        .compare-table thead th {
            background: var(--bg-soft);
            padding: 1rem 1.25rem;
            text-align: left;
            font-family: var(--font-display);
            font-weight: 700;
            color: var(--text);
            font-size: 0.85rem;
            letter-spacing: 0.02em;
            border-bottom: 2px solid var(--border);
        }
        .compare-table thead th:first-child {
            border-radius: var(--radius-lg) 0 0 0;
        }
        .compare-table thead th:last-child {
            border-radius: 0 var(--radius-lg) 0 0;
        }
        .compare-table tbody td {
            padding: 1rem 1.25rem;
            border-bottom: 1px solid var(--border-light);
            color: var(--text-secondary);
            vertical-align: top;
        }
        .compare-table tbody tr:last-child td {
            border-bottom: none;
        }
        .compare-table tbody tr:hover td {
            background: var(--bg-soft);
        }
        .compare-table .col-label {
            font-weight: 600;
            color: var(--text);
            font-family: var(--font-display);
            font-size: 0.85rem;
            white-space: nowrap;
            letter-spacing: -0.01em;
        }
        .compare-table .check {
            color: var(--mint);
            font-weight: 700;
        }
        .compare-table .partial {
            color: var(--amber);
            font-weight: 600;
        }

        /* 新手入口区 */
        .quickstart-section {
            padding: 2rem 0 5rem;
        }
        .quickstart-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.25rem;
            max-width: 900px;
            margin: 0 auto;
        }
        .quickstart-card {
            text-align: center;
            padding: 2rem 1.5rem;
            background: var(--bg);
            border: 2px dashed var(--border);
            border-radius: var(--radius-lg);
            transition: all 0.35s ease;
            cursor: pointer;
        }
        .quickstart-card:hover {
            border-color: var(--primary);
            border-style: solid;
            background: var(--bg-soft);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .quickstart-card .qs-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            margin: 0 auto 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
        }
        .quickstart-card:nth-child(1) .qs-icon {
            background: var(--primary-soft);
            color: var(--primary);
        }
        .quickstart-card:nth-child(2) .qs-icon {
            background: var(--mint-soft);
            color: var(--mint);
        }
        .quickstart-card:nth-child(3) .qs-icon {
            background: var(--amber-soft);
            color: var(--amber);
        }
        .quickstart-card h4 {
            font-family: var(--font-display);
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
            color: var(--text);
            letter-spacing: -0.01em;
        }
        .quickstart-card p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 1rem;
        }
        .quickstart-link {
            font-family: var(--font-display);
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            transition: gap 0.2s ease;
        }
        .quickstart-card:hover .quickstart-link {
            gap: 0.55rem;
        }

        /* FAQ区 */
        .faq-section {
            padding: 3rem 0 5rem;
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 1.25rem 1.5rem;
            transition: all 0.25s ease;
        }
        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-sm);
        }
        .faq-item h4 {
            font-family: var(--font-display);
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
            letter-spacing: -0.01em;
            cursor: default;
        }
        .faq-item p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* 按钮副文本 */
        .btn-sub {
            display: block;
            font-size: 0.68rem;
            font-weight: 400;
            opacity: 0.75;
            letter-spacing: 0.02em;
            margin-top: 0.1rem;
        }

        /* 响应式补充 */
        @media (max-width: 768px) {
            .logo {
                font-size: 1.2rem;
            }
            .site-nav a {
                font-size: 0.8rem;
                padding: 0.4rem 0.7rem;
            }
            .hero {
                padding: 4.5rem 0 3rem;
            }
            .hero-browser {
                border-radius: var(--radius-lg);
            }
            .browser-body {
                grid-template-columns: 1fr;
                padding: 1.25rem;
                min-height: auto;
            }
            .stats-grid {
                gap: 1rem;
            }
            .stat-value {
                font-size: 2rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .cta-card {
                padding: 3rem 1.5rem;
            }
            footer .container {
                flex-direction: column;
                gap: 1.25rem;
                text-align: center;
            }
            .footer-left {
                flex-direction: column;
                gap: 0.4rem;
            }
            .quickstart-grid {
                grid-template-columns: 1fr;
                max-width: 400px;
            }
            .compare-table-wrap {
                font-size: 0.8rem;
            }
            .compare-table thead th,
            .compare-table tbody td {
                padding: 0.75rem 0.9rem;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 1.25rem;
            }
            header .container {
                flex-direction: column;
                height: auto;
                padding-top: 0.75rem;
                padding-bottom: 0.75rem;
                gap: 0.5rem;
            }
            .site-nav a {
                font-size: 0.78rem;
                padding: 0.3rem 0.55rem;
            }
            .hero {
                padding: 3.5rem 0 2.5rem;
            }
            .hero h1 {
                font-size: 2.6rem;
            }
            .hero-tagline {
                letter-spacing: 0.2em;
                font-size: 0.95rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                justify-content: center;
                max-width: 260px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .feature-card {
                padding: 1.5rem;
            }
            .cta-card h2 {
                font-size: 1.7rem;
            }
            .seo-prose {
                font-size: 0.88rem;
            }
            .quickstart-grid {
                grid-template-columns: 1fr;
            }
            .faq-item {
                padding: 1rem 1.1rem;
            }
        }