/* 变量定义 - 谷歌品牌配色系统 */
        :root {
            --h0u505-google-blue: #4285F4;
            --h0u505-google-red: #EA4335;
            --h0u505-google-yellow: #FBBC05;
            --h0u505-google-green: #34A853;
            --h0u505-text-main: #202124;
            --h0u505-text-sub: #5f6368;
            --h0u505-bg-light: #f8f9fa;
            --h0u505-white: #ffffff;
            --h0u505-shadow: 0 4px 20px rgba(0,0,0,0.08);
            --h0u505-radius: 16px;
            --h0u505-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* 基础样式 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--h0u505-bg-light);
            color: var(--h0u505-text-main);
            line-height: 1.7;
            word-break: keep-all;
            overflow-x: hidden;
        }

        .h0u505-wrapper {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航系统 */
        .h0u505-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: var(--h0u505-transition);
        }

        .h0u505-nav-container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            max-width: 1400px;
            margin: 0 auto;
            padding: 12px 24px;
        }

        .h0u505-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .h0u505-logo img {
            height: 32px;
            display: block;
        }

        .h0u505-nav-links {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
        }

        .h0u505-nav-item a {
            text-decoration: none;
            color: var(--h0u505-text-sub);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            transition: var(--h0u505-transition);
        }

        .h0u505-nav-item a:hover {
            background: rgba(66, 133, 244, 0.05);
            color: var(--h0u505-google-blue);
        }

        .h0u505-nav-item.active a {
            background: var(--h0u505-google-blue);
            color: var(--h0u505-white);
        }

        /* Hero 区块 - 独特非对称设计 */
        .h0u505-hero {
            padding: 160px 0 80px;
            background: linear-gradient(135deg, #fff 0%, #f0f4ff 100%);
            position: relative;
            overflow: hidden;
        }

        .h0u505-hero::before {
            content: "";
            position: absolute;
            top: -10%;
            right: -5%;
            width: 40%;
            height: 120%;
            background: radial-gradient(circle, rgba(66,133,244,0.05) 0%, transparent 70%);
            transform: rotate(-15deg);
        }

        .h0u505-hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            min-width: 0;
        }

        .h0u505-hero-text {
            flex: 1;
            min-width: 300px;
            z-index: 1;
        }

        .h0u505-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            color: var(--h0u505-text-main);
            letter-spacing: -1px;
        }

        .h0u505-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--h0u505-text-sub);
            max-width: 600px;
            margin-bottom: 40px;
            word-break: break-word;
        }

        /* 快捷键卡片矩阵 */
        .h0u505-section {
            padding: 80px 0;
        }

        .h0u505-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .h0u505-card {
            background: var(--h0u505-white);
            border-radius: var(--h0u505-radius);
            padding: 32px;
            box-shadow: var(--h0u505-shadow);
            transition: var(--h0u505-transition);
            border: 1px solid rgba(0,0,0,0.03);
            min-width: 0;
        }

        .h0u505-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 40px rgba(0,0,0,0.12);
        }

        .h0u505-card-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(66, 133, 244, 0.1);
            color: var(--h0u505-google-blue);
            border-radius: 6px;
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .h0u505-card-title {
            font-size: 24px;
            margin-bottom: 24px;
            font-weight: 700;
        }

        .h0u505-shortcut-list {
            list-style: none;
        }

        .h0u505-shortcut-item {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            min-width: 0;
        }

        .h0u505-shortcut-item:last-child {
            border-bottom: none;
        }

        .h0u505-key-label {
            font-size: 14px;
            color: var(--h0u505-text-sub);
            flex: 1;
            min-width: 0;
            padding-right: 16px;
        }

        .h0u505-key-combo {
            display: flex;
            flex-wrap: wrap;
            gap: 4px;
        }

        .h0u505-kbd {
            background: #f1f3f4;
            border: 1px solid #dadce0;
            border-radius: 6px;
            box-shadow: 0 2px 0 #dadce0;
            color: var(--h0u505-text-main);
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            line-height: 1;
            padding: 6px 10px;
            white-space: nowrap;
        }

        /* 智能区块 */
        .h0u505-ai-section {
            background: var(--h0u505-text-main);
            color: var(--h0u505-white);
            border-radius: 32px;
            padding: 64px;
            margin: 40px 0;
            position: relative;
            overflow: hidden;
        }

        .h0u505-ai-section::after {
            content: "Gemini";
            position: absolute;
            bottom: -20px;
            right: 20px;
            font-size: 120px;
            font-weight: 900;
            opacity: 0.05;
        }

        .h0u505-ai-title {
            color: var(--h0u505-google-blue);
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .h0u505-ai-main {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
            margin-bottom: 24px;
            max-width: 800px;
        }

        /* 安全矩阵区块 */
        .h0u505-security-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 40px;
        }

        .h0u505-security-box {
            flex: 1;
            min-width: 280px;
            background: #fff;
            padding: 24px;
            border-radius: var(--h0u505-radius);
            border-left: 4px solid var(--h0u505-google-green);
        }

        .h0u505-security-box h4 {
            margin-bottom: 12px;
            color: var(--h0u505-google-green);
        }

        /* 页脚设计 */
        .h0u505-footer {
            background: #f1f3f4;
            padding: 80px 0 40px;
            margin-top: 80px;
        }

        .h0u505-footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            border-bottom: 1px solid rgba(0,0,0,0.1);
            padding-bottom: 48px;
        }

        .h0u505-footer-brand {
            flex: 1;
            min-width: 250px;
        }

        .h0u505-brand-name {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .h0u505-footer-links {
            flex: 2;
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
        }

        .h0u505-footer-col {
            min-width: 150px;
        }

        .h0u505-footer-col h5 {
            margin-bottom: 20px;
            font-size: 16px;
        }

        .h0u505-footer-col ul {
            list-style: none;
        }

        .h0u505-footer-col li {
            margin-bottom: 12px;
        }

        .h0u505-footer-col a {
            text-decoration: none;
            color: var(--h0u505-text-sub);
            font-size: 14px;
            transition: var(--h0u505-transition);
        }

        .h0u505-footer-col a:hover {
            color: var(--h0u505-google-blue);
        }

        .h0u505-copyright {
            padding-top: 40px;
            text-align: center;
            font-size: 13px;
            color: var(--h0u505-text-sub);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .h0u505-nav-links {
                display: none; /* 简化移动端，实际可加汉堡菜单 */
            }
            .h0u505-hero {
                padding: 120px 0 60px;
                text-align: center;
            }
            .h0u505-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .h0u505-ai-section {
                padding: 32px;
            }
        }