:root {
            --kuarrz-primary: #ff4d4f;
            --kuarrz-secondary: #2f54eb;
            --kuarrz-medical-bg: #f0f7ff;
            --kuarrz-text-dark: #262626;
            --kuarrz-text-gray: #595959;
            --kuarrz-white: #ffffff;
            --kuarrz-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
            --kuarrz-radius: 16px;
            --kuarrz-container-width: 1300px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: #f8fafc;
            color: var(--kuarrz-text-dark);
            line-height: 1.8;
            overflow-x: hidden;
        }

        /* 导航栏设计 */
        .kuarrz-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }

        .kuarrz-nav-container {
            max-width: var(--kuarrz-container-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .kuarrz-logo {
            flex: 0 0 auto;
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .kuarrz-logo img {
            height: 32px;
            width: auto;
        }

        .kuarrz-nav-menu {
            display: flex;
            list-style: none;
            gap: 8px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .kuarrz-nav-item a {
            text-decoration: none;
            color: var(--kuarrz-text-dark);
            font-size: clamp(0.9rem, 1vw + 0.2rem, 1rem);
            padding: 8px 16px;
            border-radius: 8px;
            transition: all 0.3s ease;
            white-space: nowrap;
            display: block;
            word-break: keep-all;
        }

        .kuarrz-nav-item a:hover {
            background: rgba(255, 77, 79, 0.05);
            color: var(--kuarrz-primary);
        }

        .kuarrz-nav-item.active a {
            background: var(--kuarrz-primary);
            color: var(--kuarrz-white);
            font-weight: 600;
        }

        /* Hero 区块 - 独特非对称布局 */
        .kuarrz-hero-section {
            padding-top: 160px;
            padding-bottom: 96px;
            background: radial-gradient(circle at 90% 10%, #fff1f0 0%, #f0f7ff 100%);
            position: relative;
            overflow: hidden;
        }

        .kuarrz-hero-section::after {
            content: "";
            position: absolute;
            right: -10%;
            top: 20%;
            width: 40%;
            height: 60%;
            background: linear-gradient(135deg, rgba(47, 84, 235, 0.05) 0%, rgba(255, 77, 79, 0.05) 100%);
            border-radius: 50% 20% 50% 20%;
            filter: blur(80px);
            z-index: 1;
        }

        .kuarrz-container {
            max-width: var(--kuarrz-container-width);
            margin: 0 auto;
            padding: 0 32px;
            position: relative;
            z-index: 2;
        }

        .kuarrz-hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

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

        .kuarrz-badge {
            display: inline-block;
            padding: 4px 12px;
            background: var(--kuarrz-secondary);
            color: white;
            border-radius: 20px;
            font-size: 0.85rem;
            margin-bottom: 24px;
            letter-spacing: 1px;
        }

        .kuarrz-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            font-weight: 800;
            margin-bottom: 24px;
            color: #1a1a1a;
            white-space: normal;
        }

        .kuarrz-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.2rem, 1.25rem);
            color: var(--kuarrz-text-gray);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .kuarrz-hero-visual {
            flex: 1;
            min-width: 320px;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        /* 模拟医疗专业感的装饰元素 */
        .kuarrz-medical-card {
            background: var(--kuarrz-white);
            padding: 32px;
            border-radius: 24px;
            box-shadow: var(--kuarrz-shadow);
            border: 1px solid rgba(47, 84, 235, 0.1);
            width: 100%;
            max-width: 480px;
            position: relative;
        }

        .kuarrz-pulse-line {
            height: 4px;
            background: linear-gradient(90deg, var(--kuarrz-secondary), transparent);
            width: 60%;
            margin-bottom: 24px;
            border-radius: 2px;
        }

        /* 下载分类区块 */
        .kuarrz-download-grid {
            padding: 96px 0;
            background: var(--kuarrz-white);
        }

        .kuarrz-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .kuarrz-section-title {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
            font-weight: 700;
            margin-bottom: 16px;
        }

        .kuarrz-grid-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 32px;
            flex-wrap: wrap;
        }

        .kuarrz-category-card {
            background: #fcfcfd;
            border: 1px solid #f0f0f0;
            padding: 40px;
            border-radius: var(--kuarrz-radius);
            transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
            position: relative;
            overflow: hidden;
            min-width: 0;
        }

        .kuarrz-category-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--kuarrz-shadow);
            border-color: var(--kuarrz-secondary);
        }

        .kuarrz-card-icon {
            width: 56px;
            height: 56px;
            background: var(--kuarrz-medical-bg);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            color: var(--kuarrz-secondary);
            font-weight: bold;
            font-size: 1.5rem;
        }

        .kuarrz-card-title {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .kuarrz-card-desc {
            color: var(--kuarrz-text-gray);
            font-size: 0.95rem;
            margin-bottom: 24px;
        }

        .kuarrz-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 24px;
            border-radius: 8px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
            gap: 8px;
        }

        .kuarrz-btn-primary {
            background: var(--kuarrz-primary);
            color: white;
        }

        .kuarrz-btn-primary:hover {
            background: #ff7875;
            box-shadow: 0 4px 12px rgba(255, 77, 79, 0.3);
        }

        .kuarrz-btn-outline {
            background: transparent;
            border: 1.5px solid var(--kuarrz-secondary);
            color: var(--kuarrz-secondary);
        }

        .kuarrz-btn-outline:hover {
            background: var(--kuarrz-secondary);
            color: white;
        }

        /* 动态内容区块 */
        .kuarrz-dynamic-section {
            padding: 96px 0;
            background: #fafafa;
        }

        .kuarrz-data-row {
            display: flex;
            flex-wrap: wrap;
            background: white;
            border-radius: 12px;
            margin-bottom: 16px;
            padding: 24px;
            align-items: center;
            border: 1px solid #eee;
            transition: background 0.3s ease;
        }

        .kuarrz-data-row:hover {
            background: #f0f7ff;
        }

        .kuarrz-data-col {
            flex: 1;
            min-width: 150px;
            padding: 0 12px;
            word-break: keep-all;
        }

        .kuarrz-data-label {
            display: block;
            font-size: 0.8rem;
            color: #999;
            margin-bottom: 4px;
        }

        .kuarrz-data-value {
            font-weight: 600;
            color: var(--kuarrz-text-dark);
        }

        /* 页脚设计 */
        .kuarrz-footer {
            background: #141414;
            color: rgba(255, 255, 255, 0.65);
            padding: 80px 0 40px;
        }

        .kuarrz-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
            flex-wrap: wrap;
        }

        .kuarrz-footer-brand {
            font-size: 1.5rem;
            font-weight: 700;
            color: white;
            margin-bottom: 24px;
        }

        .kuarrz-footer-links h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.1rem;
        }

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

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

        .kuarrz-footer-links a {
            color: rgba(255, 255, 255, 0.45);
            text-decoration: none;
            transition: color 0.3s ease;
        }

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

        .kuarrz-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .kuarrz-nav-container {
                height: auto;
                padding: 16px;
            }
            .kuarrz-nav-menu {
                margin-top: 16px;
                justify-content: center;
                width: 100%;
            }
            .kuarrz-hero-section {
                padding-top: 180px;
                text-align: center;
            }
            .kuarrz-hero-subtitle {
                margin: 0 auto 40px;
            }
            .kuarrz-hero-visual {
                order: -1;
            }
            .kuarrz-data-row {
                flex-direction: column;
                text-align: center;
                gap: 16px;
            }
            .kuarrz-data-col {
                width: 100%;
            }
        }

        /* 动画增强 */
        .kuarrz-hover-float {
            transition: transform 0.3s ease;
        }
        .kuarrz-hover-float:hover {
            transform: translateY(-5px);
        }