:root {
            --kuarrz-primary: #ff6600;
            --kuarrz-primary-dark: #e65c00;
            --kuarrz-secondary: #2c3e50;
            --kuarrz-text: #333333;
            --kuarrz-text-light: #666666;
            --kuarrz-bg: #ffffff;
            --kuarrz-bg-alt: #f8f9fa;
            --kuarrz-white: #ffffff;
            --kuarrz-shadow: 0 4px 20px rgba(0,0,0,0.08);
            --kuarrz-radius: 16px;
            --kuarrz-max-width: 1400px;
            --kuarrz-spacing: 8px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
            color: var(--kuarrz-text);
            line-height: 1.6;
            background-color: var(--kuarrz-bg);
            word-break: break-word;
            overflow-x: hidden;
        }

        /* 导航栏 */
        .kuarrz-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }

        .kuarrz-nav-container {
            max-width: var(--kuarrz-max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

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

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

        .kuarrz-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: clamp(10px, 2vw, 24px);
            min-width: 0;
        }

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

        .kuarrz-nav-link {
            text-decoration: none;
            color: var(--kuarrz-text);
            font-weight: 500;
            font-size: 15px;
            transition: color 0.3s;
            white-space: nowrap;
        }

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

        .kuarrz-nav-link.active {
            color: var(--kuarrz-primary);
            position: relative;
        }

        .kuarrz-nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--kuarrz-primary);
            border-radius: 2px;
        }

        /* Hero 区块 - 独特居中搜索设计 */
        .kuarrz-hero {
            padding: 160px 24px 80px;
            background: radial-gradient(circle at top right, #fff5f0 0%, #ffffff 100%);
            text-align: center;
            overflow: hidden;
        }

        .kuarrz-hero-content {
            max-width: 900px;
            margin: 0 auto;
        }

        .kuarrz-hero-title {
            font-size: clamp(2rem, 5vw + 1rem, 3.5rem);
            line-height: 1.2;
            margin-bottom: 24px;
            color: var(--kuarrz-secondary);
            font-weight: 800;
            word-break: keep-all;
        }

        .kuarrz-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--kuarrz-text-light);
            margin-bottom: 48px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .kuarrz-search-box {
            background: var(--kuarrz-white);
            padding: 8px;
            border-radius: 40px;
            box-shadow: 0 10px 40px rgba(255, 102, 0, 0.15);
            display: flex;
            flex-wrap: wrap;
            max-width: 600px;
            margin: 0 auto;
            border: 2px solid #ffefe6;
        }

        .kuarrz-search-input {
            flex: 1;
            border: none;
            padding: 12px 24px;
            font-size: 18px;
            outline: none;
            border-radius: 40px;
            min-width: 200px;
        }

        .kuarrz-search-btn {
            background: var(--kuarrz-primary);
            color: white;
            border: none;
            padding: 12px 32px;
            border-radius: 30px;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.2s, background 0.3s;
        }

        .kuarrz-search-btn:hover {
            background: var(--kuarrz-primary-dark);
            transform: translateY(-2px);
        }

        /* 统计区块 */
        .kuarrz-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 48px;
            padding: 64px 24px;
            background: var(--kuarrz-white);
        }

        .kuarrz-stat-item {
            text-align: center;
            min-width: 150px;
        }

        .kuarrz-stat-number {
            display: block;
            font-size: 40px;
            font-weight: 800;
            color: var(--kuarrz-primary);
        }

        .kuarrz-stat-label {
            color: var(--kuarrz-text-light);
            font-size: 14px;
        }

        /* 词库分类网格 */
        .kuarrz-section {
            padding: 80px 24px;
            max-width: var(--kuarrz-max-width);
            margin: 0 auto;
        }

        .kuarrz-section-header {
            margin-bottom: 48px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: flex-end;
            gap: 16px;
        }

        .kuarrz-section-title {
            font-size: 32px;
            font-weight: 700;
            position: relative;
            padding-left: 20px;
        }

        .kuarrz-section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 6px;
            height: 32px;
            background: var(--kuarrz-primary);
            border-radius: 3px;
        }

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

        .kuarrz-lex-card {
            background: var(--kuarrz-bg-alt);
            border-radius: var(--kuarrz-radius);
            padding: 32px;
            transition: all 0.3s ease;
            border: 1px solid transparent;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .kuarrz-lex-card:hover {
            background: var(--kuarrz-white);
            border-color: var(--kuarrz-primary);
            transform: translateY(-8px);
            box-shadow: var(--kuarrz-shadow);
        }

        .kuarrz-lex-icon {
            width: 56px;
            height: 56px;
            background: rgba(255, 102, 0, 0.1);
            border-radius: 12px;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--kuarrz-primary);
        }

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

        .kuarrz-lex-desc {
            font-size: 14px;
            color: var(--kuarrz-text-light);
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .kuarrz-lex-btn {
            display: inline-block;
            text-decoration: none;
            color: var(--kuarrz-primary);
            font-weight: 600;
            font-size: 15px;
            transition: opacity 0.3s;
        }

        .kuarrz-lex-btn:hover {
            text-decoration: underline;
        }

        /* 热门资讯区块 */
        .kuarrz-news-section {
            background: #fdfdfd;
            border-top: 1px solid #eee;
        }

        .kuarrz-news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .kuarrz-news-item {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
            border-bottom: 1px dashed #ddd;
        }

        .kuarrz-news-link {
            text-decoration: none;
            color: var(--kuarrz-text);
            font-size: 16px;
            transition: color 0.2s;
            flex: 1;
            min-width: 250px;
        }

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

        .kuarrz-news-date {
            color: #999;
            font-size: 14px;
        }

        /* 页脚 */
        .kuarrz-footer {
            background: var(--kuarrz-secondary);
            color: rgba(255,255,255,0.8);
            padding: 64px 24px 32px;
        }

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

        .kuarrz-footer-brand {
            flex: 1;
            min-width: 280px;
        }

        .kuarrz-footer-brand-name {
            font-size: 24px;
            font-weight: bold;
            color: white;
            margin-bottom: 16px;
            display: block;
        }

        .kuarrz-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            flex: 2;
        }

        .kuarrz-footer-column {
            min-width: 140px;
        }

        .kuarrz-footer-column h4 {
            color: white;
            margin-bottom: 24px;
            font-size: 16px;
        }

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

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

        .kuarrz-footer-column a {
            text-decoration: none;
            color: rgba(255,255,255,0.6);
            font-size: 14px;
            transition: color 0.3s;
        }

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

        .kuarrz-copyright {
            max-width: var(--kuarrz-max-width);
            margin: 48px auto 0;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 14px;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .kuarrz-nav-container {
                height: auto;
                padding: 16px;
            }
            .kuarrz-nav-menu {
                width: 100%;
                margin-top: 16px;
                justify-content: center;
            }
            .kuarrz-hero {
                padding: 120px 24px 60px;
            }
            .kuarrz-stats {
                gap: 24px;
            }
            .kuarrz-grid {
                grid-template-columns: 1fr;
            }
        }