:root {
            --kuarrz-primary: #FF6600;
            --kuarrz-secondary: #FF4500;
            --kuarrz-dark: #1D1D1F;
            --kuarrz-light: #F5F5F7;
            --kuarrz-text: #333333;
            --kuarrz-gray: #86868B;
            --kuarrz-white: #FFFFFF;
            --kuarrz-accent: #0071E3;
            --kuarrz-container: 1100px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--kuarrz-white);
            color: var(--kuarrz-text);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 导航栏设计：悬浮毛玻璃效果 */
        .kuarrz-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .kuarrz-nav-container {
            max-width: var(--kuarrz-container);
            margin: 0 auto;
            padding: 0 24px;
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

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

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

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

        .kuarrz-nav-item {
            margin-left: 24px;
            min-width: 0;
        }

        .kuarrz-nav-link {
            text-decoration: none;
            color: var(--kuarrz-text);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

        .kuarrz-nav-link:hover {
            color: var(--kuarrz-primary);
        }

        .kuarrz-nav-link.active {
            color: var(--kuarrz-primary);
            font-weight: 700;
            border-bottom: 2px solid var(--kuarrz-primary);
            padding-bottom: 4px;
        }

        /* Hero 区：非对称动态布局 */
        .kuarrz-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: radial-gradient(circle at top right, rgba(255,102,0,0.05), transparent),
                        radial-gradient(circle at bottom left, rgba(0,113,227,0.03), transparent);
            overflow: hidden;
        }

        .kuarrz-hero-inner {
            max-width: var(--kuarrz-container);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }

        .kuarrz-hero-text {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
            padding-right: 48px;
        }

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

        .kuarrz-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.4rem);
            color: var(--kuarrz-gray);
            margin-bottom: 48px;
            max-width: 600px;
        }

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

        .kuarrz-hero-card {
            background: var(--kuarrz-white);
            border-radius: 32px;
            box-shadow: 0 20px 80px rgba(0,0,0,0.1);
            padding: 40px;
            width: 100%;
            max-width: 420px;
            position: relative;
            z-index: 2;
        }

        .kuarrz-download-options {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .kuarrz-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 16px 32px;
            border-radius: 12px;
            font-size: 18px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .kuarrz-btn-primary {
            background: linear-gradient(135deg, var(--kuarrz-primary), var(--kuarrz-secondary));
            color: var(--kuarrz-white);
            box-shadow: 0 10px 20px rgba(255,102,0,0.2);
        }

        .kuarrz-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 30px rgba(255,102,0,0.3);
        }

        .kuarrz-btn-outline {
            background: var(--kuarrz-white);
            color: var(--kuarrz-dark);
            border: 2px solid var(--kuarrz-dark);
        }

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

        /* 核心功能区：网格化卡片 */
        .kuarrz-section {
            padding: 96px 0;
            max-width: var(--kuarrz-container);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

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

        .kuarrz-section-title {
            font-size: clamp(2rem, 3vw + 0.5rem, 2.5rem);
            font-weight: 700;
            margin-bottom: 16px;
        }

        .kuarrz-feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
        }

        .kuarrz-feature-card {
            background: var(--kuarrz-light);
            padding: 40px;
            border-radius: 24px;
            transition: transform 0.3s ease;
            min-width: 0;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

        .kuarrz-feature-card:hover {
            transform: translateY(-8px);
        }

        .kuarrz-feature-icon {
            width: 64px;
            height: 64px;
            background: var(--kuarrz-white);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            margin-bottom: 24px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
        }

        .kuarrz-feature-name {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .kuarrz-feature-desc {
            color: var(--kuarrz-gray);
            font-size: 16px;
            word-break: break-word;
        }

        /* 动态资讯区 */
        .kuarrz-dynamic-section {
            background-color: var(--kuarrz-dark);
            color: var(--kuarrz-white);
            padding: 96px 0;
        }

        .kuarrz-news-container {
            max-width: var(--kuarrz-container);
            margin: 0 auto;
            padding: 0 24px;
        }

        .kuarrz-news-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .kuarrz-news-item {
            flex: 1;
            min-width: 300px;
            background: rgba(255,255,255,0.05);
            padding: 32px;
            border-radius: 16px;
            border: 1px solid rgba(255,255,255,0.1);
        }

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

        /* 底部设计 */
        .kuarrz-footer {
            padding: 64px 0 32px;
            background: var(--kuarrz-light);
            border-top: 1px solid rgba(0,0,0,0.05);
        }

        .kuarrz-footer-content {
            max-width: var(--kuarrz-container);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .kuarrz-footer-brand {
            flex: 1;
            min-width: 240px;
        }

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

        .kuarrz-footer-links {
            display: flex;
            gap: 64px;
            flex-wrap: wrap;
        }

        .kuarrz-footer-col {
            min-width: 120px;
        }

        .kuarrz-footer-col h4 {
            font-size: 14px;
            text-transform: uppercase;
            color: var(--kuarrz-gray);
            margin-bottom: 20px;
        }

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

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

        .kuarrz-footer-col ul li a {
            text-decoration: none;
            color: var(--kuarrz-text);
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .kuarrz-footer-col ul li a:hover {
            color: var(--kuarrz-primary);
        }

        .kuarrz-footer-bottom {
            max-width: var(--kuarrz-container);
            margin: 48px auto 0;
            padding: 32px 24px 0;
            border-top: 1px solid rgba(0,0,0,0.05);
            text-align: center;
            color: var(--kuarrz-gray);
            font-size: 12px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .kuarrz-nav-menu {
                display: none; /* 简化移动端导航 */
            }
            .kuarrz-hero-text {
                padding-right: 0;
                text-align: center;
                margin-bottom: 48px;
            }
            .kuarrz-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .kuarrz-hero-visual {
                width: 100%;
            }
            .kuarrz-feature-grid {
                grid-template-columns: 1fr;
            }
        }