:root {
            --hdsq1-primary: #1A73E8;
            --hdsq1-secondary: #34A853;
            --hdsq1-tertiary: #FBBC05;
            --hdsq1-accent: #EA4335;
            --hdsq1-bg-light: #F8F9FA;
            --hdsq1-text-main: #202124;
            --hdsq1-text-muted: #5F6368;
            --hdsq1-white: #FFFFFF;
            --hdsq1-glass: rgba(255, 255, 255, 0.8);
            --hdsq1-container-width: 1320px;
            --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-main);
            background-color: var(--hdsq1-bg-light);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 布局规范 */
        .hdsq1-container {
            max-width: var(--hdsq1-container-width);
            margin: 0 auto;
            padding: 0 calc(var(--hdsq1-spacing-unit) * 3);
        }

        .hdsq1-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .hdsq1-flex-item {
            min-width: 0;
        }

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

        .hdsq1-header.hdsq1-scrolled {
            background: var(--hdsq1-glass);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
        }

        .hdsq1-nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }

        .hdsq1-logo img {
            height: 32px;
            width: auto;
            display: block;
        }

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

        .hdsq1-nav-item a {
            text-decoration: none;
            color: var(--hdsq1-text-main);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 0;
            position: relative;
            transition: color 0.3s;
            letter-spacing: 0.5px;
        }

        .hdsq1-nav-item a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--hdsq1-primary);
            transition: width 0.3s;
        }

        .hdsq1-nav-item a:hover {
            color: var(--hdsq1-primary);
        }

        .hdsq1-nav-item a:hover::after {
            width: 100%;
        }

        .hdsq1-nav-item.hdsq1-active a {
            color: var(--hdsq1-primary);
        }

        .hdsq1-nav-item.hdsq1-active a::after {
            width: 100%;
        }

        /* 流体形状背景 */
        .hdsq1-liquid-shapes {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            z-index: -1;
            pointer-events: none;
        }

        .hdsq1-shape {
            position: absolute;
            filter: blur(80px);
            opacity: 0.15;
            border-radius: 50%;
        }

        .hdsq1-shape-1 {
            width: 500px;
            height: 500px;
            background: var(--hdsq1-primary);
            top: -100px;
            right: -100px;
        }

        .hdsq1-shape-2 {
            width: 400px;
            height: 400px;
            background: var(--hdsq1-tertiary);
            bottom: -50px;
            left: -100px;
        }

        /* Hero 区块 - 居中垂直结构 */
        .hdsq1-hero {
            padding: 180px 0 100px;
            text-align: center;
            position: relative;
        }

        .hdsq1-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #1A73E8 0%, #EA4335 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            word-break: break-word;
        }

        .hdsq1-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.2rem, 1.4rem);
            color: var(--hdsq1-text-muted);
            max-width: 800px;
            margin: 0 auto 48px;
            word-break: break-word;
        }

        /* 呼吸灯按钮 */
        .hdsq1-btn-download {
            display: inline-flex;
            align-items: center;
            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);
            animation: hdsq1-breathing 2.5s ease-in-out infinite;
            transition: transform 0.3s, box-shadow 0.3s;
        }

        @keyframes hdsq1-breathing {
            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); }
        }

        .hdsq1-btn-download:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 40px rgba(26, 115, 232, 0.5);
        }

        /* 插件推荐网格 */
        .hdsq1-extension-section {
            padding: 80px 0;
            position: relative;
        }

        .hdsq1-grid-title {
            font-size: 32px;
            margin-bottom: 48px;
            position: relative;
            display: inline-block;
        }

        .hdsq1-grid-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 0;
            width: 60px;
            height: 4px;
            background: var(--hdsq1-tertiary);
            border-radius: 2px;
        }

        .hdsq1-extension-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
            gap: 32px;
        }

        .hdsq1-extension-card {
            background: var(--hdsq1-white);
            border-radius: 24px;
            padding: 40px;
            transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
            border: 1px solid rgba(0,0,0,0.03);
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

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

        .hdsq1-card-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            font-weight: 800;
            color: white;
            margin-bottom: 8px;
        }

        .hdsq1-card-title {
            font-size: 24px;
            font-weight: 700;
        }

        .hdsq1-card-desc {
            color: var(--hdsq1-text-muted);
            font-size: 16px;
            flex-grow: 1;
        }

        .hdsq1-card-tag {
            display: inline-block;
            padding: 4px 12px;
            background: #f1f3f4;
            border-radius: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--hdsq1-text-muted);
            text-transform: uppercase;
        }

        /* 非对称特色区块 */
        .hdsq1-feature-section {
            padding: 100px 0;
            background: #fff;
            margin: 60px 0;
            border-radius: 40px;
        }

        .hdsq1-feature-layout {
            display: flex;
            align-items: center;
            gap: 64px;
        }

        .hdsq1-feature-content {
            flex: 1;
            min-width: 0;
        }

        .hdsq1-feature-visual {
            flex: 1.2;
            min-width: 0;
            background: linear-gradient(135deg, #f8f9fa 0%, #e8f0fe 100%);
            height: 400px;
            border-radius: 30px;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hdsq1-abstract-box {
            width: 70%;
            height: 60%;
            background: white;
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
            padding: 30px;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .hdsq1-skeleton-line {
            height: 10px;
            background: #f1f3f4;
            border-radius: 5px;
        }

        .hdsq1-skeleton-line.short { width: 40%; }
        .hdsq1-skeleton-line.medium { width: 70%; }
        .hdsq1-skeleton-line.long { width: 100%; }

        /* 动态内容标记区块 */
        .hdsq1-news-section {
            padding: 80px 0;
        }

        .hdsq1-news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 24px;
        }

        .hdsq1-news-item {
            padding: 24px;
            border-bottom: 1px solid #eee;
            transition: background 0.3s;
        }

        .hdsq1-news-item:hover {
            background: rgba(26, 115, 232, 0.02);
        }

        .hdsq1-news-date {
            font-size: 13px;
            color: var(--hdsq1-primary);
            font-weight: 600;
            display: block;
            margin-bottom: 8px;
        }

        /* 页脚 */
        .hdsq1-footer {
            background: #202124;
            color: #fff;
            padding: 80px 0 40px;
            margin-top: 100px;
        }

        .hdsq1-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 60px;
            margin-bottom: 60px;
        }

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

        .hdsq1-footer-brand p {
            color: #9aa0a6;
            max-width: 300px;
        }

        .hdsq1-footer-links h4 {
            font-size: 16px;
            margin-bottom: 24px;
            color: #fff;
        }

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

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

        .hdsq1-footer-links a {
            color: #9aa0a6;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .hdsq1-copyright {
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            color: #70757a;
            font-size: 14px;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .hdsq1-footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .hdsq1-nav-menu {
                display: none; /* 简化移动端处理 */
            }
            .hdsq1-hero-title {
                font-size: 2.8rem;
            }
            .hdsq1-feature-layout {
                flex-direction: column;
            }
            .hdsq1-extension-grid {
                grid-template-columns: 1fr;
            }
            .hdsq1-footer-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }