:root {
            --t618w1-primary: #188038;
            --t618w1-accent: #1a73e8;
            --t618w1-bg-light: #f8f9fa;
            --t618w1-text-main: #202124;
            --t618w1-text-sub: #5f6368;
            --t618w1-white: #ffffff;
            --t618w1-shadow: 0 4px 20px rgba(0,0,0,0.08);
            --t618w1-radius: 16px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            color: var(--t618w1-text-main);
            line-height: 1.6;
            background-color: var(--t618w1-bg-light);
            word-break: break-word;
            overflow-x: hidden;
        }

        /* 导航栏 */
        .t618w1-header {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .t618w1-nav-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
            flex-wrap: wrap;
        }

        .t618w1-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .t618w1-logo img {
            height: 36px;
            width: auto;
        }

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

        .t618w1-menu li {
            margin-left: 8px;
        }

        .t618w1-menu a {
            text-decoration: none;
            color: var(--t618w1-text-sub);
            padding: 8px 16px;
            font-size: clamp(0.9rem, 1vw + 0.2rem, 1rem);
            font-weight: 500;
            border-radius: 8px;
            transition: all 0.2s ease;
            display: inline-block;
        }

        .t618w1-menu a:hover {
            color: var(--t618w1-primary);
            background: rgba(24, 128, 56, 0.05);
        }

        .t618w1-menu a.t618w1-active {
            color: var(--t618w1-primary);
            background: rgba(24, 128, 56, 0.1);
        }

        /* Hero 区块 */
        .t618w1-hero {
            padding-top: 140px;
            padding-bottom: 80px;
            background: radial-gradient(circle at top right, rgba(24, 128, 56, 0.05), transparent);
            text-align: center;
        }

        .t618w1-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
        }

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

        .t618w1-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.4rem);
            color: var(--t618w1-text-sub);
            max-width: 800px;
            margin: 0 auto 48px;
            line-height: 1.8;
        }

        /* 隐私状态仪表盘样式 */
        .t618w1-status-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 48px;
        }

        .t618w1-status-card {
            flex: 1;
            min-width: 300px;
            background: var(--t618w1-white);
            padding: 40px;
            border-radius: var(--t618w1-radius);
            box-shadow: var(--t618w1-shadow);
            transition: transform 0.3s ease;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            text-align: left;
        }

        .t618w1-status-card:hover {
            transform: translateY(-8px);
        }

        .t618w1-badge {
            background: #e6f4ea;
            color: #188038;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .t618w1-card-title {
            font-size: 1.5rem;
            margin-bottom: 16px;
            font-weight: 700;
        }

        /* 内核演进时间轴 */
        .t618w1-timeline-section {
            padding: 96px 0;
            background: #ffffff;
        }

        .t618w1-section-label {
            text-align: center;
            color: var(--t618w1-accent);
            text-transform: uppercase;
            letter-spacing: 2px;
            font-weight: 700;
            margin-bottom: 16px;
            display: block;
        }

        .t618w1-section-title {
            text-align: center;
            font-size: clamp(2rem, 3vw, 2.5rem);
            margin-bottom: 64px;
        }

        .t618w1-timeline {
            display: flex;
            flex-direction: column;
            gap: 32px;
            max-width: 900px;
            margin: 0 auto;
        }

        .t618w1-timeline-item {
            display: flex;
            flex-wrap: wrap;
            background: var(--t618w1-bg-light);
            border-radius: var(--t618w1-radius);
            padding: 32px;
            border-left: 6px solid var(--t618w1-primary);
        }

        .t618w1-timeline-content {
            flex: 1;
            min-width: 0;
        }

        .t618w1-version {
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--t618w1-primary);
            margin-bottom: 12px;
            display: block;
        }

        .t618w1-timeline-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }

        .t618w1-timeline-stat b {
            display: block;
            color: var(--t618w1-text-main);
            margin-bottom: 4px;
        }

        .t618w1-timeline-stat span {
            font-size: 0.9rem;
            color: var(--t618w1-text-sub);
        }

        /* 插件集选 */
        .t618w1-extension-section {
            padding: 96px 0;
        }

        .t618w1-extension-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 32px;
        }

        .t618w1-ext-group {
            background: var(--t618w1-white);
            border-radius: var(--t618w1-radius);
            padding: 32px;
            box-shadow: var(--t618w1-shadow);
        }

        .t618w1-ext-category {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 24px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--t618w1-bg-light);
        }

        .t618w1-ext-list {
            list-style: none;
        }

        .t618w1-ext-item {
            margin-bottom: 20px;
        }

        .t618w1-ext-name {
            font-weight: 600;
            color: var(--t618w1-accent);
            display: block;
        }

        .t618w1-ext-desc {
            font-size: 0.95rem;
            color: var(--t618w1-text-sub);
        }

        /* FAQ 区块 */
        .t618w1-faq-section {
            padding: 96px 0;
            background: #1a1d21;
            color: #ffffff;
        }

        .t618w1-faq-container {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .t618w1-faq-item {
            margin-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding-bottom: 32px;
        }

        .t618w1-faq-q {
            font-size: 1.4rem;
            font-weight: 600;
            margin-bottom: 16px;
            color: #4db6ac;
        }

        .t618w1-faq-a {
            font-size: 1.1rem;
            line-height: 1.8;
            color: rgba(255,255,255,0.7);
        }

        /* 页脚 */
        .t618w1-footer {
            background: #f1f3f4;
            padding: 64px 0 32px;
            border-top: 1px solid #e0e0e0;
        }

        .t618w1-footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 48px;
        }

        .t618w1-footer-brand {
            flex: 2;
            min-width: 280px;
        }

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

        .t618w1-footer-links {
            flex: 3;
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            min-width: 0;
        }

        .t618w1-footer-col {
            min-width: 140px;
            flex: 1;
        }

        .t618w1-footer-col h4 {
            margin-bottom: 20px;
            font-size: 1rem;
        }

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

        .t618w1-footer-col a {
            text-decoration: none;
            color: var(--t618w1-text-sub);
            font-size: 0.9rem;
            display: block;
            margin-bottom: 10px;
            transition: color 0.2s;
        }

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

        .t618w1-copyright {
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid #dadce0;
            font-size: 0.85rem;
            color: var(--t618w1-text-sub);
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .t618w1-nav-container {
                height: auto;
                padding: 16px;
            }
            .t618w1-menu {
                margin-top: 16px;
                justify-content: center;
                width: 100%;
            }
            .t618w1-menu li {
                margin: 4px;
            }
            .t618w1-hero {
                padding-top: 180px;
            }
            .t618w1-status-grid, .t618w1-extension-grid {
                flex-direction: column;
            }
        }