:root {
            --t618w1-primary: #188038;
            --t618w1-primary-light: #e6f4ea;
            --t618w1-accent: #4285f4;
            --t618w1-text-main: #202124;
            --t618w1-text-muted: #5f6368;
            --t618w1-bg-light: #f8f9fa;
            --t618w1-white: #ffffff;
            --t618w1-shadow: 0 4px 20px rgba(0,0,0,0.08);
            --t618w1-radius: 16px;
            --t618w1-container-width: 1300px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", sans-serif;
            color: var(--t618w1-text-main);
            line-height: 1.6;
            background-color: var(--t618w1-bg-light);
            word-break: break-word;
        }

        /* 导航系统 */
        .t618w1-nav-wrapper {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 72px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            display: flex;
            justify-content: center;
        }

        .t618w1-nav-container {
            width: 100%;
            max-width: var(--t618w1-container-width);
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

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

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

        .t618w1-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
            min-width: 0;
        }

        .t618w1-menu-link {
            text-decoration: none;
            color: var(--t618w1-text-muted);
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 8px;
            transition: all 0.3s ease;
            font-size: 15px;
            white-space: nowrap;
        }

        .t618w1-menu-link:hover {
            color: var(--t618w1-primary);
            background: var(--t618w1-primary-light);
        }

        .t618w1-menu-link.t618w1-active {
            color: var(--t618w1-white);
            background: var(--t618w1-primary);
        }

        /* Hero 视觉区 */
        .t618w1-hero {
            padding-top: 140px;
            padding-bottom: 80px;
            background: radial-gradient(circle at top right, #e8f0fe 0%, #ffffff 50%);
            display: flex;
            justify-content: center;
            overflow: hidden;
        }

        .t618w1-hero-content {
            width: 100%;
            max-width: 1000px;
            padding: 0 24px;
            text-align: center;
            min-width: 0;
        }

        .t618w1-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            color: var(--t618w1-text-main);
            letter-spacing: -1px;
        }

        .t618w1-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.4rem);
            color: var(--t618w1-text-muted);
            max-width: 700px;
            margin: 0 auto 48px;
        }

        /* 快捷键主面板 - 模拟键盘布局创意 */
        .t618w1-shortcut-grid {
            max-width: var(--t618w1-container-width);
            margin: 0 auto 80px;
            padding: 0 24px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .t618w1-category-card {
            background: var(--t618w1-white);
            border-radius: var(--t618w1-radius);
            padding: 32px;
            box-shadow: var(--t618w1-shadow);
            transition: transform 0.3s ease;
            min-width: 0;
        }

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

        .t618w1-category-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 24px;
            padding-bottom: 12px;
            border-bottom: 3px solid var(--t618w1-primary-light);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .t618w1-shortcut-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
            padding: 12px;
            border-radius: 12px;
            background: var(--t618w1-bg-light);
            transition: background 0.2s;
        }

        .t618w1-shortcut-item:hover {
            background: #f1f3f4;
        }

        .t618w1-key-wrap {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            justify-content: flex-end;
            min-width: 0;
        }

        .t618w1-key {
            background: var(--t618w1-white);
            border: 1px solid #dadce0;
            border-bottom: 3px solid #dadce0;
            border-radius: 6px;
            padding: 4px 10px;
            font-size: 13px;
            font-weight: 700;
            box-shadow: 0 2px 0 rgba(0,0,0,0.05);
            color: #3c4043;
        }

        .t618w1-desc {
            font-size: 14px;
            color: var(--t618w1-text-muted);
            font-weight: 500;
            padding-right: 12px;
        }

        /* 核心演进线 */
        .t618w1-evolution {
            background: #1a1a1a;
            color: var(--t618w1-white);
            padding: 96px 24px;
            display: flex;
            justify-content: center;
        }

        .t618w1-evolution-inner {
            width: 100%;
            max-width: 1100px;
            min-width: 0;
        }

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

        .t618w1-timeline {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            margin-top: 48px;
        }

        .t618w1-timeline-item {
            flex: 1;
            min-width: 300px;
            border-left: 2px solid var(--t618w1-primary);
            padding-left: 24px;
            position: relative;
        }

        .t618w1-milestone {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .t618w1-stat-box {
            background: rgba(255,255,255,0.05);
            padding: 20px;
            border-radius: 12px;
            margin-top: 16px;
        }

        .t618w1-stat-item {
            margin-bottom: 8px;
            font-size: 14px;
            opacity: 0.9;
        }

        /* 插件中心 */
        .t618w1-extensions {
            padding: 96px 24px;
            background: var(--t618w1-white);
            display: flex;
            justify-content: center;
        }

        .t618w1-extensions-grid {
            width: 100%;
            max-width: var(--t618w1-container-width);
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 32px;
        }

        .t618w1-ext-group {
            min-width: 0;
        }

        .t618w1-ext-card {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 24px;
            border: 1px solid #eee;
            border-radius: var(--t618w1-radius);
            margin-bottom: 16px;
            transition: all 0.3s ease;
        }

        .t618w1-ext-card:hover {
            border-color: var(--t618w1-primary);
            box-shadow: var(--t618w1-shadow);
        }

        .t618w1-ext-info h4 {
            font-size: 1.1rem;
            margin-bottom: 4px;
        }

        .t618w1-ext-info p {
            font-size: 14px;
            color: var(--t618w1-text-muted);
        }

        /* FAQ */
        .t618w1-faq {
            padding: 80px 24px;
            background: var(--t618w1-bg-light);
            display: flex;
            justify-content: center;
        }

        .t618w1-faq-container {
            width: 100%;
            max-width: 800px;
            min-width: 0;
        }

        .t618w1-faq-item {
            background: var(--t618w1-white);
            border-radius: 12px;
            padding: 24px;
            margin-bottom: 16px;
        }

        .t618w1-faq-q {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 12px;
            color: var(--t618w1-primary);
        }

        /* 页脚 */
        .t618w1-footer {
            background: #f1f3f4;
            padding: 64px 24px;
            text-align: center;
            border-top: 1px solid #dadce0;
        }

        .t618w1-footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--t618w1-text-main);
            margin-bottom: 16px;
        }

        .t618w1-footer-links {
            display: flex;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }

        .t618w1-footer-links a {
            text-decoration: none;
            color: var(--t618w1-text-muted);
            font-size: 14px;
        }

        .t618w1-copyright {
            font-size: 13px;
            color: #80868b;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .t618w1-nav-container {
                justify-content: center;
                padding: 10px;
            }
            .t618w1-menu {
                justify-content: center;
                margin-top: 10px;
            }
            .t618w1-hero {
                padding-top: 180px;
            }
            .t618w1-extensions-grid {
                grid-template-columns: 1fr;
            }
        }