:root {
            --hdsq1-primary: #1A73E8;
            --hdsq1-secondary: #34A853;
            --hdsq1-tertiary: #FBBC05;
            --hdsq1-danger: #EA4335;
            --hdsq1-text-main: #202124;
            --hdsq1-text-sub: #5F6368;
            --hdsq1-bg-light: #F8F9FA;
            --hdsq1-glass: rgba(255, 255, 255, 0.8);
            --hdsq1-spacing: 8px;
            --hdsq1-max-width: 1400px;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
            color: var(--hdsq1-text-main);
            background-color: #ffffff;
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航栏设计 - 磨砂玻璃效果 */
        .hdsq1-header {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: transparent;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 20px 0;
        }

        .hdsq1-header.hdsq1-scrolled {
            background: var(--hdsq1-glass);
            backdrop-filter: blur(15px);
            padding: 12px 0;
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
        }

        .hdsq1-nav-container {
            max-width: var(--hdsq1-max-width);
            margin: 0 auto;
            padding: 0 40px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

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

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

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

        .hdsq1-nav-menu li a {
            text-decoration: none;
            color: var(--hdsq1-text-main);
            font-size: 15px;
            font-weight: 400;
            transition: color 0.3s;
            position: relative;
            padding: 8px 0;
        }

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

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

        /* Hero 区 - 非对称流体设计 */
        .hdsq1-hero {
            padding: 180px 40px 100px;
            background: radial-gradient(circle at 90% 10%, rgba(26, 115, 232, 0.05) 0%, transparent 40%),
                        radial-gradient(circle at 10% 90%, rgba(251, 188, 5, 0.05) 0%, transparent 40%);
            position: relative;
            min-height: 80vh;
            display: flex;
            align-items: center;
        }

        .hdsq1-hero-content {
            max-width: var(--hdsq1-max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
        }

        .hdsq1-hero-text {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        .hdsq1-hero-text h1 {
            font-size: clamp(2.5rem, 5vw, 4rem);
            line-height: 1.1;
            margin-bottom: 24px;
            color: var(--hdsq1-text-main);
            font-weight: 700;
        }

        .hdsq1-hero-text p {
            font-size: clamp(1.1rem, 2vw, 1.3rem);
            color: var(--hdsq1-text-sub);
            margin-bottom: 40px;
            max-width: 600px;
        }

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

        /* 呼吸灯按钮 */
        .hdsq1-btn-primary {
            display: inline-block;
            padding: 18px 48px;
            background: var(--hdsq1-primary);
            color: white;
            text-decoration: none;
            border-radius: 50px;
            font-weight: 600;
            font-size: 18px;
            box-shadow: 0 10px 30px rgba(26, 115, 232, 0.3);
            transition: all 0.3s;
            animation: hdsq1-pulse 2s infinite;
        }

        @keyframes hdsq1-pulse {
            0% { transform: scale(1); box-shadow: 0 10px 30px rgba(26, 115, 232, 0.3); }
            50% { transform: scale(1.03); box-shadow: 0 15px 40px rgba(26, 115, 232, 0.4); }
            100% { transform: scale(1); box-shadow: 0 10px 30px rgba(26, 115, 232, 0.3); }
        }

        .hdsq1-btn-primary:hover {
            background: #1557b0;
            transform: translateY(-3px);
        }

        /* 隐私教程主体内容 */
        .hdsq1-main-content {
            padding: 100px 40px;
            max-width: 1100px;
            margin: 0 auto;
        }

        .hdsq1-section-title {
            text-align: center;
            margin-bottom: 80px;
        }

        .hdsq1-section-title h2 {
            font-size: clamp(2rem, 4vw, 2.5rem);
            margin-bottom: 16px;
        }

        .hdsq1-liquid-container {
            position: relative;
            padding: 64px;
            background: var(--hdsq1-bg-light);
            border-radius: 40px 100px 40px 100px;
            margin-bottom: 80px;
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: center;
            overflow: hidden;
        }

        .hdsq1-liquid-container::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 200px;
            height: 200px;
            background: var(--hdsq1-tertiary);
            opacity: 0.1;
            border-radius: 50%;
        }

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

        .hdsq1-step-text h3 {
            font-size: 28px;
            margin-bottom: 20px;
            color: var(--hdsq1-primary);
        }

        .hdsq1-step-text ul {
            list-style: none;
        }

        .hdsq1-step-text li {
            margin-bottom: 16px;
            padding-left: 28px;
            position: relative;
        }

        .hdsq1-step-text li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--hdsq1-secondary);
            font-weight: bold;
        }

        .hdsq1-step-ui {
            flex: 1;
            min-width: 300px;
            background: white;
            padding: 30px;
            border-radius: 24px;
            box-shadow: 0 20px 50px rgba(0,0,0,0.05);
        }

        /* 网格布局卡片 */
        .hdsq1-grid-layout {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: 64px;
        }

        .hdsq1-card {
            background: white;
            padding: 40px;
            border-radius: 24px;
            border: 1px solid #eee;
            transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
            position: relative;
            overflow: hidden;
        }

        .hdsq1-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 30px 60px rgba(0,0,0,0.08);
            border-color: var(--hdsq1-primary);
        }

        .hdsq1-card h4 {
            font-size: 22px;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        /* 动态内容区块 */
        .hdsq1-dynamic-section {
            padding: 100px 40px;
            background: #fdfdfd;
        }

        .hdsq1-news-grid {
            max-width: var(--hdsq1-max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .hdsq1-news-item {
            flex: 1;
            min-width: 300px;
            background: #fff;
            padding: 24px;
            border-left: 4px solid var(--hdsq1-primary);
            box-shadow: 0 5px 15px rgba(0,0,0,0.02);
        }

        /* 页脚 */
        .hdsq1-footer {
            background: #202124;
            color: #bdc1c6;
            padding: 80px 40px 40px;
        }

        .hdsq1-footer-content {
            max-width: var(--hdsq1-max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 60px;
        }

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

        .hdsq1-footer-brand h2 {
            color: white;
            font-size: 24px;
            margin-bottom: 20px;
        }

        .hdsq1-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            flex: 2;
        }

        .hdsq1-link-group {
            min-width: 150px;
        }

        .hdsq1-link-group h5 {
            color: white;
            margin-bottom: 20px;
            font-size: 16px;
        }

        .hdsq1-link-group a {
            display: block;
            color: #bdc1c6;
            text-decoration: none;
            margin-bottom: 12px;
            font-size: 14px;
            transition: color 0.3s;
        }

        .hdsq1-link-group a:hover {
            color: white;
        }

        .hdsq1-copyright {
            max-width: var(--hdsq1-max-width);
            margin: 60px auto 0;
            padding-top: 30px;
            border-top: 1px solid #3c4043;
            text-align: center;
            font-size: 14px;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .hdsq1-nav-container { padding: 0 20px; }
            .hdsq1-nav-menu { display: none; } /* 移动端可改为汉堡菜单，此处简化 */
            .hdsq1-hero { padding-top: 140px; }
            .hdsq1-liquid-container { padding: 32px; border-radius: 20px 40px; }
        }