: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-glass: rgba(255, 255, 255, 0.8);
            --hdsq1-container-width: 1100px;
            --hdsq1-base-unit: 8px;
        }

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

        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            color: var(--hdsq1-text-main);
            background-color: #ffffff;
            line-height: 1.6;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 导航系统 */
        .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);
            background: transparent;
        }

        .hdsq1-header.hdsq1-scrolled {
            background: var(--hdsq1-glass);
            backdrop-filter: blur(15px);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
            padding: 4px 0;
        }

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

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

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

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

        .hdsq1-menu-item a {
            text-decoration: none;
            color: var(--hdsq1-text-main);
            font-size: 0.95rem;
            font-weight: 300;
            letter-spacing: 0.5px;
            transition: color 0.3s;
            position: relative;
        }

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

        .hdsq1-menu-item a.hdsq1-active {
            font-weight: 600;
            color: var(--hdsq1-primary);
        }

        .hdsq1-menu-item a.hdsq1-active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--hdsq1-primary);
            border-radius: 2px;
        }

        /* Hero 区布局 - 非对称设计 */
        .hdsq1-hero {
            position: relative;
            padding: 160px 24px 96px;
            min-height: 80vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
        }

        .hdsq1-hero-shape {
            position: absolute;
            top: -10%;
            right: -10%;
            width: 60%;
            height: 80%;
            background: var(--hdsq1-primary);
            opacity: 0.05;
            border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
            animation: hdsq1-morph 15s ease-in-out infinite;
            z-index: 1;
        }

        @keyframes hdsq1-morph {
            0% { border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; }
            33% { border-radius: 70% 30% 50% 50% / 30% 30% 70% 70%; }
            66% { border-radius: 30% 60% 70% 40% / 50% 60% 30% 40%; }
            100% { border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; }
        }

        .hdsq1-hero-inner {
            max-width: var(--hdsq1-container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 64px;
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .hdsq1-hero-content {
            min-width: 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .hdsq1-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
            line-height: 1.1;
            font-weight: 800;
            color: var(--hdsq1-text-main);
            margin-bottom: 24px;
            word-break: keep-all;
        }

        .hdsq1-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.4rem);
            color: var(--hdsq1-text-muted);
            margin-bottom: 40px;
            max-width: 600px;
        }

        /* 动态呼吸灯下载按钮 */
        .hdsq1-download-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--hdsq1-primary);
            color: white;
            padding: 20px 48px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.2rem;
            box-shadow: 0 10px 20px rgba(26, 115, 232, 0.3);
            transition: all 0.3s;
            position: relative;
            align-self: flex-start;
            animation: hdsq1-breath 3s infinite ease-in-out;
        }

        @keyframes hdsq1-breath {
            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-download-btn:hover {
            transform: translateY(-3px);
            background: #1765cc;
        }

        /* 视觉特征区块 - 非对称栅格 */
        .hdsq1-features {
            padding: 96px 24px;
            background: #ffffff;
        }

        .hdsq1-section-title {
            max-width: var(--hdsq1-container-width);
            margin: 0 auto 64px;
            text-align: left;
        }

        .hdsq1-section-title h2 {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .hdsq1-grid {
            max-width: var(--hdsq1-container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 24px;
        }

        .hdsq1-card {
            background: var(--hdsq1-bg-light);
            padding: 40px;
            border-radius: 24px;
            min-width: 0;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
        }

        .hdsq1-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
        }

        .hdsq1-card-1 { grid-column: span 7; min-height: 400px; background: linear-gradient(to bottom right, #e8f0fe, #ffffff); }
        .hdsq1-card-2 { grid-column: span 5; background: linear-gradient(to bottom right, #e6f4ea, #ffffff); }
        .hdsq1-card-3 { grid-column: span 5; background: linear-gradient(to bottom right, #fef7e0, #ffffff); }
        .hdsq1-card-4 { grid-column: span 7; background: linear-gradient(to bottom right, #fce8e6, #ffffff); }

        .hdsq1-card h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--hdsq1-text-main);
        }

        .hdsq1-card p {
            color: var(--hdsq1-text-muted);
        }

        /* 下载详情区块 */
        .hdsq1-info-section {
            padding: 96px 24px;
            background: var(--hdsq1-text-main);
            color: white;
            border-radius: 48px 48px 0 0;
        }

        .hdsq1-info-container {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .hdsq1-info-item {
            flex: 1 1 250px;
            min-width: 0;
        }

        .hdsq1-info-item h4 {
            color: var(--hdsq1-tertiary);
            margin-bottom: 12px;
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 2px;
        }

        .hdsq1-info-value {
            font-size: 1.2rem;
            font-weight: 300;
        }

        /* 页脚 */
        .hdsq1-footer {
            background: var(--hdsq1-text-main);
            color: rgba(255, 255, 255, 0.6);
            padding: 64px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .hdsq1-footer-content {
            max-width: var(--hdsq1-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .hdsq1-footer-brand {
            flex: 1 1 300px;
            min-width: 0;
        }

        .hdsq1-footer-brand h2 {
            color: white;
            margin-bottom: 24px;
            font-weight: 700;
        }

        .hdsq1-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .hdsq1-footer-col {
            min-width: 150px;
        }

        .hdsq1-footer-col h5 {
            color: white;
            margin-bottom: 24px;
            font-size: 1rem;
        }

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

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

        .hdsq1-footer-col a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .hdsq1-bottom {
            max-width: var(--hdsq1-container-width);
            margin: 48px auto 0;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
            font-size: 0.85rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .hdsq1-nav-container {
                flex-direction: column;
                gap: 16px;
            }
            .hdsq1-menu {
                justify-content: center;
                gap: 12px;
            }
            .hdsq1-menu-item a {
                font-size: 0.85rem;
            }
            .hdsq1-grid {
                display: flex;
                flex-direction: column;
            }
            .hdsq1-hero {
                padding-top: 180px;
                text-align: center;
            }
            .hdsq1-download-btn {
                align-self: center;
            }
            .hdsq1-card {
                grid-column: span 12 !important;
            }
        }

        /* 装饰性占位图形 */
        .hdsq1-abstract-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            margin-bottom: 24px;
            background: white;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 16px rgba(0,0,0,0.05);
        }

        .hdsq1-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            margin: 2px;
        }