:root {
            --t618w1-primary: #188038;
            --t618w1-primary-light: #e6f4ea;
            --t618w1-dark: #202124;
            --t618w1-gray: #5f6368;
            --t618w1-accent: #4285f4;
            --t618w1-bg: #ffffff;
            --t618w1-card-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --t618w1-radius: 16px;
            --t618w1-gap: 32px;
        }

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

        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--t618w1-bg);
            color: var(--t618w1-dark);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 导航系统 */
        .t618w1-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .t618w1-nav-container {
            max-width: 1400px;
            width: 95vw;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

        .t618w1-logo {
            flex: 0 0 auto;
            min-width: 0;
            height: 40px;
        }

        .t618w1-logo img {
            height: 100%;
            width: auto;
            display: block;
        }

        .t618w1-nav-menu {
            display: flex;
            list-style: none;
            gap: 20px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .t618w1-nav-item a {
            text-decoration: none;
            color: var(--t618w1-gray);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .t618w1-nav-item a:hover {
            color: var(--t618w1-primary);
            background: var(--t618w1-primary-light);
        }

        .t618w1-nav-item.active a {
            color: var(--t618w1-primary);
            background: var(--t618w1-primary-light);
        }

        /* Hero 区域 - 非对称动态布局 */
        .t618w1-hero {
            padding: 160px 0 100px;
            background: radial-gradient(circle at 90% 10%, #f1f8f1 0%, #ffffff 50%);
            position: relative;
            overflow: hidden;
        }

        .t618w1-hero-container {
            max-width: 1100px;
            width: 90vw;
            margin: 0 auto;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 64px;
        }

        .t618w1-hero-content {
            flex: 1 1 500px;
            min-width: 0;
        }

        .t618w1-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
            line-height: 1.1;
            margin-bottom: 24px;
            font-weight: 800;
            color: var(--t618w1-dark);
            letter-spacing: -1px;
        }

        .t618w1-hero-subtitle {
            font-size: clamp(1.1rem, 1vw + 0.8rem, 1.4rem);
            color: var(--t618w1-gray);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .t618w1-sync-visual {
            flex: 1 1 400px;
            min-width: 0;
            position: relative;
            display: flex;
            justify-content: center;
        }

        /* 纯CSS设计的视觉元素 */
        .t618w1-sync-orb {
            width: 300px;
            height: 300px;
            background: linear-gradient(135deg, var(--t618w1-primary) 0%, #34a853 100%);
            border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
            animation: t618w1-morph 10s ease-in-out infinite;
            filter: blur(2px);
            opacity: 0.9;
            position: relative;
        }

        @keyframes t618w1-morph {
            0% { border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; }
            34% { border-radius: 70% 30% 50% 50% / 30% 30% 70% 70%; }
            67% { border-radius: 100% 60% 60% 100% / 100% 100% 60% 60%; }
            100% { border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; }
        }

        /* 核心功能卡片 */
        .t618w1-features {
            padding: 96px 0;
            background: #fafafa;
        }

        .t618w1-section-header {
            text-align: center;
            margin-bottom: 64px;
            padding: 0 20px;
        }

        .t618w1-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            max-width: 1300px;
            width: 95vw;
            margin: 0 auto;
        }

        .t618w1-feature-card {
            background: #ffffff;
            padding: 48px;
            border-radius: var(--t618w1-radius);
            box-shadow: var(--t618w1-card-shadow);
            transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            border: 1px solid rgba(0,0,0,0.03);
        }

        .t618w1-feature-card:hover {
            transform: translateY(-12px);
        }

        .t618w1-feature-icon {
            width: 64px;
            height: 64px;
            background: var(--t618w1-primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            color: var(--t618w1-primary);
            font-size: 28px;
            font-weight: bold;
        }

        /* 内核进化时间轴 */
        .t618w1-timeline-section {
            padding: 96px 0;
            background: #ffffff;
        }

        .t618w1-timeline {
            max-width: 1000px;
            width: 90vw;
            margin: 0 auto;
            position: relative;
        }

        .t618w1-timeline-item {
            margin-bottom: 48px;
            padding-left: 40px;
            border-left: 3px solid var(--t618w1-primary-light);
            position: relative;
        }

        .t618w1-timeline-item::before {
            content: '';
            position: absolute;
            left: -11px;
            top: 0;
            width: 20px;
            height: 20px;
            background: var(--t618w1-primary);
            border: 4px solid #fff;
            border-radius: 50%;
        }

        .t618w1-milestone-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--t618w1-primary);
        }

        .t618w1-milestone-details {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .t618w1-badge {
            background: #f1f3f4;
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 13px;
            color: var(--t618w1-gray);
        }

        /* 插件集精选 */
        .t618w1-extensions {
            padding: 96px 0;
            background: var(--t618w1-dark);
            color: #fff;
        }

        .t618w1-extension-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 40px;
            max-width: 1200px;
            width: 90vw;
            margin: 0 auto;
        }

        .t618w1-extension-group {
            background: rgba(255,255,255,0.05);
            padding: 32px;
            border-radius: var(--t618w1-radius);
            border: 1px solid rgba(255,255,255,0.1);
        }

        .t618w1-extension-group h3 {
            color: var(--t618w1-primary);
            margin-bottom: 24px;
            font-size: 1.8rem;
        }

        .t618w1-extension-item {
            margin-bottom: 20px;
            padding-bottom: 20px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }

        .t618w1-extension-item:last-child {
            border-bottom: none;
            margin-bottom: 0;
        }

        .t618w1-extension-name {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 4px;
        }

        .t618w1-extension-desc {
            color: #bdc1c6;
            font-size: 14px;
        }

        /* 常见问题 */
        .t618w1-faq {
            padding: 96px 0;
        }

        .t618w1-faq-container {
            max-width: 800px;
            width: 90vw;
            margin: 0 auto;
        }

        .t618w1-faq-item {
            margin-bottom: 24px;
            border-bottom: 1px solid #eee;
            padding-bottom: 24px;
        }

        .t618w1-question {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--t618w1-dark);
        }

        /* 页脚 */
        .t618w1-footer {
            background: #f8f9fa;
            padding: 64px 0 32px;
            border-top: 1px solid #eee;
        }

        .t618w1-footer-content {
            max-width: 1400px;
            width: 95vw;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 48px;
        }

        .t618w1-footer-brand h2 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--t618w1-primary);
        }

        .t618w1-footer-links {
            display: flex;
            gap: 64px;
            flex-wrap: wrap;
        }

        .t618w1-footer-group h4 {
            margin-bottom: 20px;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--t618w1-gray);
        }

        .t618w1-footer-group ul {
            list-style: none;
        }

        .t618w1-footer-group li {
            margin-bottom: 12px;
        }

        .t618w1-footer-group a {
            text-decoration: none;
            color: var(--t618w1-dark);
            font-size: 14px;
            transition: color 0.3s;
        }

        .t618w1-footer-group a:hover {
            color: var(--t618w1-primary);
        }

        .t618w1-copyright {
            width: 100%;
            text-align: center;
            margin-top: 64px;
            padding-top: 32px;
            border-top: 1px solid #eee;
            color: var(--t618w1-gray);
            font-size: 13px;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .t618w1-nav-menu {
                display: none; /* 简化移动端，实际开发中应使用汉堡菜单 */
            }
            .t618w1-hero-container {
                flex-direction: column;
                text-align: center;
            }
            .t618w1-sync-orb {
                width: 200px;
                height: 200px;
            }
            .t618w1-grid {
                grid-template-columns: 1fr;
            }
            .t618w1-extension-grid {
                grid-template-columns: 1fr;
            }
        }