:root {
            --kuarrz-primary: #ff5a00;
            --kuarrz-primary-light: #ff8c4d;
            --kuarrz-dark: #222222;
            --kuarrz-gray: #666666;
            --kuarrz-light: #f8f9fa;
            --kuarrz-white: #ffffff;
            --kuarrz-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --kuarrz-radius: 16px;
            --kuarrz-container-width: 1100px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--kuarrz-white);
            color: var(--kuarrz-dark);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: keep-all;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

        /* 布局基础 */
        .kuarrz-container {
            max-width: var(--kuarrz-container-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .kuarrz-flex {
            display: flex;
            flex-wrap: wrap;
        }

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

        /* 导航栏 */
        .kuarrz-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: transform 0.3s ease;
        }

        .kuarrz-nav-wrapper {
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

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

        .kuarrz-logo img {
            height: 32px;
            display: block;
        }

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

        .kuarrz-nav-item a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--kuarrz-gray);
            padding: 8px 0;
            position: relative;
        }

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

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

        /* Hero 区域 - 独特的词库探索视角 */
        .kuarrz-hero {
            padding-top: 140px;
            padding-bottom: 80px;
            background: linear-gradient(135deg, #fffcf9 0%, #fff0e6 100%);
            position: relative;
            overflow: hidden;
        }

        .kuarrz-hero::before {
            content: '';
            position: absolute;
            top: -10%;
            right: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255,90,0,0.05) 0%, transparent 70%);
            border-radius: 50%;
        }

        .kuarrz-hero-content {
            text-align: center;
            position: relative;
            z-index: 1;
            max-width: 800px;
            margin: 0 auto;
            word-break: break-word;
        }

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

        .kuarrz-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--kuarrz-gray);
            margin-bottom: 48px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .kuarrz-search-bar {
            background: var(--kuarrz-white);
            padding: 8px;
            border-radius: 50px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            max-width: 600px;
            margin: 0 auto;
        }

        .kuarrz-search-input {
            flex: 1;
            border: none;
            padding: 12px 24px;
            font-size: 1rem;
            outline: none;
            background: transparent;
            min-width: 200px;
        }

        .kuarrz-search-btn {
            background: var(--kuarrz-primary);
            color: var(--kuarrz-white);
            border: none;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s;
        }

        .kuarrz-search-btn:hover {
            transform: scale(1.05);
            background: var(--kuarrz-primary-light);
        }

        /* 词库分类导航 */
        .kuarrz-category-section {
            padding: 40px 0;
            background: var(--kuarrz-white);
            border-bottom: 1px solid #eee;
        }

        .kuarrz-cat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
            gap: 16px;
        }

        .kuarrz-cat-item {
            text-align: center;
            padding: 16px;
            border-radius: 12px;
            transition: all 0.3s;
            cursor: pointer;
            border: 1px solid transparent;
        }

        .kuarrz-cat-item:hover {
            background: var(--kuarrz-light);
            border-color: var(--kuarrz-primary);
        }

        .kuarrz-cat-icon {
            font-size: 24px;
            margin-bottom: 8px;
            display: block;
        }

        .kuarrz-cat-name {
            font-size: 0.9rem;
            font-weight: 600;
        }

        /* 核心词库列表区 */
        .kuarrz-main-content {
            padding: 80px 0;
        }

        .kuarrz-section-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 16px;
        }

        .kuarrz-section-title {
            font-size: 2rem;
            font-weight: 700;
            position: relative;
            padding-left: 16px;
        }

        .kuarrz-section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 6px;
            height: 24px;
            background: var(--kuarrz-primary);
            border-radius: 3px;
        }

        .kuarrz-lexicon-grid {
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        }

        .kuarrz-card {
            background: var(--kuarrz-white);
            border: 1px solid #f0f0f0;
            border-radius: var(--kuarrz-radius);
            padding: 32px;
            transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
            position: relative;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

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

        .kuarrz-card-tag {
            position: absolute;
            top: 20px;
            right: 20px;
            background: #fff0e6;
            color: var(--kuarrz-primary);
            font-size: 0.75rem;
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 600;
        }

        .kuarrz-card-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--kuarrz-dark);
        }

        .kuarrz-card-desc {
            font-size: 0.95rem;
            color: var(--kuarrz-gray);
            margin-bottom: 24px;
            flex-grow: 1;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .kuarrz-card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid #f5f5f5;
            padding-top: 20px;
            margin-top: auto;
        }

        .kuarrz-meta-info {
            font-size: 0.85rem;
            color: #999;
        }

        .kuarrz-download-link {
            display: inline-flex;
            align-items: center;
            color: var(--kuarrz-primary);
            font-weight: 700;
            font-size: 0.95rem;
        }

        .kuarrz-download-link:hover {
            text-decoration: underline;
        }

        /* 动态区块标记 */
        .kuarrz-section-dynamic {
            background: var(--kuarrz-light);
            padding: 80px 0;
        }

        /* 底部 CTA */
        .kuarrz-cta {
            padding: 96px 0;
            background: var(--kuarrz-dark);
            color: var(--kuarrz-white);
            text-align: center;
        }

        .kuarrz-cta-content h2 {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
            margin-bottom: 24px;
        }

        .kuarrz-btn-large {
            display: inline-block;
            background: var(--kuarrz-primary);
            color: var(--kuarrz-white);
            padding: 16px 48px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            margin-top: 32px;
            transition: all 0.3s;
        }

        .kuarrz-btn-large:hover {
            background: var(--kuarrz-white);
            color: var(--kuarrz-primary);
            transform: translateY(-3px);
        }

        /* 页脚 */
        .kuarrz-footer {
            padding: 64px 0 32px;
            background: #1a1a1a;
            color: rgba(255,255,255,0.6);
        }

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

        .kuarrz-footer-brand h3 {
            color: var(--kuarrz-white);
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .kuarrz-footer-links h4 {
            color: var(--kuarrz-white);
            margin-bottom: 20px;
            font-size: 1rem;
        }

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

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

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

        .kuarrz-footer-bottom {
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 0.85rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .kuarrz-nav-list {
                display: none; /* 简化演示，手机端通常使用汉堡菜单 */
            }
            .kuarrz-hero {
                padding-top: 100px;
            }
            .kuarrz-lexicon-grid {
                grid-template-columns: 1fr;
            }
            .kuarrz-section-header {
                flex-direction: column;
                align-items: flex-start;
            }
        }