:root {
            --kuarrz-primary: #ff6600;
            --kuarrz-secondary: #2b5797;
            --kuarrz-bg-light: #f8fafc;
            --kuarrz-text-dark: #1e293b;
            --kuarrz-text-gray: #64748b;
            --kuarrz-white: #ffffff;
            --kuarrz-accent: #ffede0;
            --kuarrz-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            --kuarrz-transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
        }

        * {
            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-bg-light);
            color: var(--kuarrz-text-dark);
            line-height: 1.8;
            overflow-x: hidden;
        }

        /* 布局基础 */
        .kuarrz-container {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航栏 */
        .kuarrz-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: var(--kuarrz-transition);
        }

        .kuarrz-nav-container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            min-width: 0;
        }

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

        .kuarrz-logo img {
            height: 36px;
            display: block;
        }

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

        .kuarrz-nav-item {
            min-width: 0;
        }

        .kuarrz-nav-link {
            text-decoration: none;
            color: var(--kuarrz-text-dark);
            font-size: 15px;
            font-weight: 500;
            transition: var(--kuarrz-transition);
            padding: 8px 4px;
            border-bottom: 2px solid transparent;
        }

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

        .kuarrz-nav-link.active {
            border-bottom-color: var(--kuarrz-primary);
        }

        /* Hero 区块 - 独特非对称布局 */
        .kuarrz-hero {
            padding: 160px 0 96px;
            background: radial-gradient(circle at 80% 20%, #fff5ed 0%, transparent 40%);
            position: relative;
            overflow: hidden;
        }

        .kuarrz-hero-wrapper {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
            min-width: 0;
        }

        .kuarrz-hero-content {
            flex: 1 1 500px;
            min-width: 0;
            word-break: break-word;
        }

        .kuarrz-badge {
            display: inline-block;
            padding: 6px 16px;
            background: var(--kuarrz-accent);
            color: var(--kuarrz-primary);
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

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

        .kuarrz-hero-subtitle {
            font-size: clamp(1.1rem, 1vw + 0.8rem, 1.4rem);
            color: var(--kuarrz-text-gray);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .kuarrz-hero-visual {
            flex: 1 1 400px;
            min-width: 0;
            position: relative;
        }

        /* 模拟纠错视觉 */
        .kuarrz-correction-panel {
            background: var(--kuarrz-white);
            border-radius: 24px;
            padding: 32px;
            box-shadow: 0 30px 60px rgba(0,0,0,0.1);
            position: relative;
            z-index: 2;
        }

        .kuarrz-input-simulation {
            font-size: 20px;
            padding: 16px;
            border-bottom: 2px solid #eee;
            margin-bottom: 20px;
            color: #999;
        }

        .kuarrz-correction-item {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
            animation: float 3s ease-in-out infinite;
        }

        .kuarrz-error-text {
            text-decoration: line-through;
            color: #ff4d4f;
            background: #fff1f0;
            padding: 2px 8px;
            border-radius: 4px;
        }

        .kuarrz-correct-text {
            color: #52c41a;
            background: #f6ffed;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: bold;
        }

        /* 功能卡片区 */
        .kuarrz-features {
            padding: 96px 0;
            background: var(--kuarrz-white);
        }

        .kuarrz-section-head {
            text-align: center;
            margin-bottom: 64px;
            word-break: break-word;
        }

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

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

        .kuarrz-feature-card {
            background: var(--kuarrz-bg-light);
            padding: 40px;
            border-radius: 20px;
            transition: var(--kuarrz-transition);
            border: 1px solid transparent;
            min-width: 0;
        }

        .kuarrz-feature-card:hover {
            transform: translateY(-10px);
            background: var(--kuarrz-white);
            border-color: var(--kuarrz-accent);
            box-shadow: var(--kuarrz-shadow);
        }

        .kuarrz-icon-box {
            width: 64px;
            height: 64px;
            background: var(--kuarrz-white);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            font-size: 28px;
            box-shadow: 0 8px 16px rgba(0,0,0,0.05);
        }

        .kuarrz-card-title {
            font-size: 22px;
            margin-bottom: 16px;
            color: var(--kuarrz-text-dark);
        }

        /* 核心技术展示 - 左右错位布局 */
        .kuarrz-tech-section {
            padding: 96px 0;
            background: var(--kuarrz-bg-light);
        }

        .kuarrz-tech-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 96px;
            min-width: 0;
        }

        .kuarrz-tech-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .kuarrz-tech-image {
            flex: 1 1 450px;
            min-width: 0;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--kuarrz-shadow);
        }

        .kuarrz-tech-info {
            flex: 1 1 400px;
            min-width: 0;
            word-break: break-word;
        }

        .kuarrz-tech-info h3 {
            font-size: 32px;
            margin-bottom: 24px;
        }

        /* 动态内容区块 */
        .kuarrz-news-section {
            padding: 96px 0;
            background: var(--kuarrz-white);
        }

        .kuarrz-news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .kuarrz-news-item {
            padding: 24px;
            border-left: 4px solid var(--kuarrz-primary);
            background: var(--kuarrz-bg-light);
            transition: var(--kuarrz-transition);
        }

        .kuarrz-news-item:hover {
            background: var(--kuarrz-accent);
        }

        /* 页脚 */
        .kuarrz-footer {
            background: #1a1a1a;
            color: #ffffff;
            padding: 80px 0 40px;
        }

        .kuarrz-footer-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            margin-bottom: 64px;
            min-width: 0;
        }

        .kuarrz-footer-col {
            flex: 1 1 200px;
            min-width: 0;
        }

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

        .kuarrz-footer-text {
            color: #999;
            font-size: 14px;
            margin-bottom: 24px;
        }

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

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

        .kuarrz-footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--kuarrz-transition);
        }

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

        .kuarrz-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid #333;
            color: #666;
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .kuarrz-nav-list {
                display: none; /* 简化演示，实际应为汉堡菜单 */
            }
            .kuarrz-hero-content {
                text-align: center;
            }
            .kuarrz-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .kuarrz-tech-row {
                text-align: center;
            }
        }

        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-5px); }
        }

        /* 装饰元素 */
        .kuarrz-visual-decoration {
            width: 100%;
            height: 300px;
            background: linear-gradient(135deg, #ff6600 0%, #ff9e5e 100%);
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 24px;
        }