:root {
            --hdsq1-primary: #1A73E8;
            --hdsq1-accent: #1A73E8;
            --hdsq1-secondary: #FBBC05;
            --hdsq1-dark: #202124;
            --hdsq1-light: #F8F9FA;
            --hdsq1-text: #3C4043;
            --hdsq1-glass: rgba(255, 255, 255, 0.8);
            --hdsq1-spacing-unit: 8px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--hdsq1-text);
            line-height: 1.8;
            overflow-x: hidden;
            background-color: #fff;
        }

        /* 排版系统 */
        h1, h2, h3 {
            word-break: keep-all;
            white-space: normal;
            font-weight: 700;
            color: var(--hdsq1-dark);
        }

        p {
            word-break: break-word;
            overflow-wrap: break-word;
            margin-bottom: 1.5rem;
        }

        /* 导航栏 */
        .hdsq1-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: transparent;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            backdrop-filter: blur(0px);
        }

        .hdsq1-header.hdsq1-scrolled {
            background: var(--hdsq1-glass);
            backdrop-filter: blur(15px);
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
        }

        .hdsq1-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 16px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

        .hdsq1-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .hdsq1-logo img {
            height: 40px;
            display: block;
        }

        .hdsq1-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
            min-width: 0;
        }

        .hdsq1-nav-link {
            text-decoration: none;
            color: var(--hdsq1-text);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s;
            letter-spacing: 0.5px;
            position: relative;
        }

        .hdsq1-nav-link:hover, .hdsq1-nav-link.hdsq1-active {
            color: var(--hdsq1-primary);
        }

        .hdsq1-nav-link.hdsq1-active::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--hdsq1-primary);
        }

        /* Hero 区块 - 非对称设计 */
        .hdsq1-hero-section {
            padding: 160px 0 100px;
            background: linear-gradient(135deg, #f0f4f8 0%, #ffffff 100%);
            position: relative;
            overflow: hidden;
        }

        .hdsq1-hero-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .hdsq1-hero-content {
            flex: 1;
            min-width: 320px;
        }

        .hdsq1-hero-title {
            font-size: clamp(2.5rem, 5vw, 4rem);
            line-height: 1.1;
            margin-bottom: 24px;
            background: linear-gradient(45deg, #202124, #1A73E8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hdsq1-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: #5f6368;
            margin-bottom: 40px;
            max-width: 600px;
        }

        .hdsq1-hero-visual {
            flex: 1;
            min-width: 320px;
            position: relative;
        }

        /* 液体形状背景 */
        .hdsq1-liquid-shape {
            position: absolute;
            z-index: 0;
            filter: blur(60px);
            opacity: 0.6;
            animation: hdsq1-float 10s infinite alternate;
        }

        .hdsq1-shape-1 {
            width: 400px;
            height: 400px;
            background: var(--hdsq1-primary);
            border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
            top: -50px;
            right: -50px;
        }

        .hdsq1-shape-2 {
            width: 300px;
            height: 300px;
            background: var(--hdsq1-secondary);
            border-radius: 50%;
            bottom: -50px;
            left: -50px;
        }

        /* 呼吸灯按钮 */
        .hdsq1-btn-download {
            display: inline-block;
            padding: 18px 48px;
            background: var(--hdsq1-primary);
            color: white;
            text-decoration: none;
            border-radius: 50px;
            font-weight: 600;
            box-shadow: 0 10px 30px rgba(26, 115, 232, 0.3);
            animation: hdsq1-breathe 3s infinite;
            transition: transform 0.3s;
        }

        .hdsq1-btn-download:hover {
            transform: translateY(-3px);
        }

        /* 内容区块 - 栅格系统 */
        .hdsq1-section {
            padding: 96px 0;
        }

        .hdsq1-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .hdsq1-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 40px;
        }

        .hdsq1-card {
            background: white;
            padding: 40px;
            border-radius: 24px;
            border: 1px solid #eef0f2;
            transition: all 0.4s ease;
            position: relative;
            z-index: 1;
        }

        .hdsq1-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            border-color: transparent;
        }

        .hdsq1-card-icon {
            font-size: 40px;
            margin-bottom: 24px;
            display: block;
        }

        /* 设置指南区块 */
        .hdsq1-guide-section {
            background: #f8f9fa;
        }

        .hdsq1-step-item {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            margin-bottom: 80px;
            align-items: center;
        }

        .hdsq1-step-item:nth-child(even) {
            flex-direction: row-reverse;
        }

        .hdsq1-step-text {
            flex: 1;
            min-width: 300px;
        }

        .hdsq1-step-number {
            font-size: 80px;
            font-weight: 900;
            color: rgba(26, 115, 232, 0.1);
            line-height: 1;
            margin-bottom: -20px;
        }

        .hdsq1-step-visual {
            flex: 1;
            min-width: 300px;
            background: white;
            border-radius: 32px;
            padding: 40px;
            box-shadow: 0 30px 60px rgba(0,0,0,0.05);
        }

        /* 隐私盾牌区块 */
        .hdsq1-shield-box {
            background: var(--hdsq1-dark);
            color: white;
            border-radius: 40px;
            padding: 64px;
            text-align: center;
            margin-top: 48px;
        }

        .hdsq1-shield-box h2 {
            color: white;
            margin-bottom: 24px;
        }

        /* 动态资讯区块 */
        .hdsq1-news-section {
            background: white;
        }

        /* 页脚 */
        .hdsq1-footer {
            padding: 80px 0 40px;
            background: #f1f3f4;
            border-top: 1px solid #dadce0;
        }

        .hdsq1-footer-grid {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            justify-content: space-between;
        }

        .hdsq1-footer-brand {
            flex: 1;
            min-width: 250px;
        }

        .hdsq1-brand-name {
            font-size: 24px;
            font-weight: 700;
            color: var(--hdsq1-primary);
            margin-bottom: 16px;
        }

        .hdsq1-footer-links {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
            flex: 2;
        }

        .hdsq1-footer-col h4 {
            margin-bottom: 24px;
            font-size: 16px;
        }

        .hdsq1-footer-col ul {
            list-style: none;
        }

        .hdsq1-footer-col ul li {
            margin-bottom: 12px;
        }

        .hdsq1-footer-col a {
            text-decoration: none;
            color: #5f6368;
            font-size: 14px;
            transition: color 0.3s;
        }

        .hdsq1-footer-col a:hover {
            color: var(--hdsq1-primary);
        }

        .hdsq1-copyright {
            text-align: center;
            margin-top: 64px;
            padding-top: 32px;
            border-top: 1px solid #dadce0;
            font-size: 13px;
            color: #70757a;
        }

        /* 动画 */
        @keyframes hdsq1-float {
            from { transform: translate(0, 0) rotate(0deg); }
            to { transform: translate(30px, 20px) rotate(10deg); }
        }

        @keyframes hdsq1-breathe {
            0% { box-shadow: 0 0 0 0 rgba(26, 115, 232, 0.4); }
            70% { box-shadow: 0 0 0 20px rgba(26, 115, 232, 0); }
            100% { box-shadow: 0 0 0 0 rgba(26, 115, 232, 0); }
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .hdsq1-nav-menu {
                display: none; /* 简化移动端，实际开发可添加汉堡菜单 */
            }
            .hdsq1-hero-section {
                padding-top: 120px;
            }
            .hdsq1-hero-visual {
                display: none;
            }
            .hdsq1-shield-box {
                padding: 32px;
            }
            .hdsq1-grid {
                grid-template-columns: 1fr;
            }
        }