:root {
            --kuarrz-primary: #ff6600;
            --kuarrz-primary-dark: #e65c00;
            --kuarrz-secondary: #4a90e2;
            --kuarrz-text: #2c3e50;
            --kuarrz-text-light: #7f8c8d;
            --kuarrz-bg: #f9fbfd;
            --kuarrz-white: #ffffff;
            --kuarrz-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            --kuarrz-radius: 16px;
            --kuarrz-container: 1400px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--kuarrz-bg);
            color: var(--kuarrz-text);
            line-height: 1.6;
            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);
            margin: 0 auto;
            padding: 0 48px;
            height: 80px;
            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: 36px;
            width: auto;
            object-fit: contain;
        }

        .kuarrz-nav-list {
            display: flex;
            list-style: none;
            gap: 32px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .kuarrz-nav-item a {
            text-decoration: none;
            color: var(--kuarrz-text);
            font-weight: 500;
            font-size: 15px;
            transition: color 0.3s ease;
            position: relative;
            padding: 8px 0;
            word-break: keep-all;
        }

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

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

        .kuarrz-nav-item.active a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--kuarrz-primary);
            border-radius: 2px;
        }

        /* Hero区设计：对角线分割与悬浮卡片 */
        .kuarrz-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: linear-gradient(135deg, #fff 0%, #f0f7ff 100%);
            position: relative;
            overflow: hidden;
        }

        .kuarrz-hero-inner {
            max-width: var(--kuarrz-container);
            margin: 0 auto;
            padding: 0 48px;
            display: flex;
            align-items: center;
            gap: 64px;
            flex-wrap: wrap;
        }

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

        .kuarrz-hero-title {
            font-size: clamp(2.5rem, 4vw + 1rem, 4rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            color: #1a1a1a;
            white-space: normal;
        }

        .kuarrz-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.35rem);
            color: var(--kuarrz-text-light);
            margin-bottom: 48px;
            max-width: 600px;
            line-height: 1.8;
        }

        .kuarrz-download-card {
            background: var(--kuarrz-white);
            padding: 40px;
            border-radius: 24px;
            box-shadow: 0 30px 60px rgba(0,0,0,0.1);
            flex: 0 1 450px;
            min-width: 320px;
            position: relative;
            z-index: 2;
            border: 1px solid rgba(255, 102, 0, 0.1);
        }

        .kuarrz-version-info {
            display: flex;
            justify-content: space-between;
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 1px dashed #eee;
        }

        .kuarrz-info-item span {
            display: block;
            font-size: 13px;
            color: var(--kuarrz-text-light);
        }

        .kuarrz-info-item strong {
            font-size: 16px;
            color: var(--kuarrz-text);
        }

        .kuarrz-btn-main {
            display: block;
            width: 100%;
            background: linear-gradient(90deg, var(--kuarrz-primary), #ff8800);
            color: white;
            text-align: center;
            padding: 20px;
            border-radius: 12px;
            font-size: 20px;
            font-weight: 700;
            text-decoration: none;
            transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            box-shadow: 0 10px 20px rgba(255, 102, 0, 0.3);
        }

        .kuarrz-btn-main:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(255, 102, 0, 0.4);
        }

        .kuarrz-btn-sub {
            display: block;
            text-align: center;
            margin-top: 16px;
            color: var(--kuarrz-text-light);
            text-decoration: none;
            font-size: 14px;
        }

        .kuarrz-btn-sub:hover {
            color: var(--kuarrz-primary);
        }

        /* 功能网格区 */
        .kuarrz-section {
            padding: 96px 48px;
            max-width: var(--kuarrz-container);
            margin: 0 auto;
        }

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

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

        .kuarrz-feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .kuarrz-feature-card {
            background: var(--kuarrz-white);
            padding: 40px;
            border-radius: var(--kuarrz-radius);
            transition: all 0.3s ease;
            border: 1px solid transparent;
            min-width: 0;
            word-break: break-word;
        }

        .kuarrz-feature-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--kuarrz-shadow);
            border-color: rgba(255, 102, 0, 0.1);
        }

        .kuarrz-feature-icon {
            width: 64px;
            height: 64px;
            background: rgba(255, 102, 0, 0.1);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            font-size: 28px;
            color: var(--kuarrz-primary);
        }

        .kuarrz-feature-card h3 {
            font-size: 22px;
            margin-bottom: 16px;
        }

        .kuarrz-feature-card p {
            color: var(--kuarrz-text-light);
            line-height: 1.7;
        }

        /* 动态内容区块 */
        .kuarrz-dynamic-bg {
            background-color: #f0f4f8;
            border-radius: 40px;
            margin: 48px;
            padding: 64px 0;
        }

        .kuarrz-news-list {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            min-width: 0;
        }

        .kuarrz-news-item {
            flex: 1 1 300px;
            background: var(--kuarrz-white);
            padding: 24px;
            border-radius: 12px;
            min-width: 0;
        }

        .kuarrz-news-item span {
            font-size: 12px;
            color: var(--kuarrz-primary);
            text-transform: uppercase;
            font-weight: 700;
        }

        .kuarrz-news-item h4 {
            margin: 12px 0;
            font-size: 18px;
        }

        /* 页脚设计 */
        .kuarrz-footer {
            background: #1a1a1a;
            color: #fff;
            padding: 96px 48px 48px;
        }

        .kuarrz-footer-content {
            max-width: var(--kuarrz-container);
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            gap: 64px;
            flex-wrap: wrap;
        }

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

        .kuarrz-footer-brand h2 {
            font-size: 24px;
            margin-bottom: 24px;
            color: var(--kuarrz-primary);
        }

        .kuarrz-footer-brand p {
            color: #999;
            max-width: 400px;
        }

        .kuarrz-footer-links {
            display: flex;
            gap: 64px;
            flex-wrap: wrap;
            min-width: 0;
        }

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

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

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

        .kuarrz-footer-group a {
            color: #999;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

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

        .kuarrz-footer-bottom {
            max-width: var(--kuarrz-container);
            margin: 64px auto 0;
            padding-top: 32px;
            border-top: 1px solid #333;
            text-align: center;
            color: #666;
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .kuarrz-nav-container { padding: 0 24px; }
            .kuarrz-hero-inner { padding: 0 24px; gap: 48px; }
        }

        @media (max-width: 768px) {
            .kuarrz-nav-list { display: none; } /* 移动端可根据需要增加汉堡菜单 */
            .kuarrz-hero { padding-top: 120px; }
            .kuarrz-hero-content { text-align: center; }
            .kuarrz-hero-title { font-size: 2.8rem; }
            .kuarrz-download-card { flex: 1 1 100%; }
            .kuarrz-dynamic-bg { margin: 16px; padding: 48px 16px; }
            .kuarrz-section { padding: 64px 24px; }
            .kuarrz-footer-links { gap: 32px; }
        }