:root {
            --iuiyl-primary: #D43F3A;
            --iuiyl-primary-hover: #B83530;
            --iuiyl-secondary: #4A90E2;
            --iuiyl-text-dark: #2C3E50;
            --iuiyl-text-light: #5E6D82;
            --iuiyl-bg-gray: #F5F7FA;
            --iuiyl-white: #FFFFFF;
            --iuiyl-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --iuiyl-radius: 12px;
            --iuiyl-container-width: 1100px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--iuiyl-text-dark);
            background-color: var(--iuiyl-white);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 导航栏设计 */
        .iuiyl-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            box-shadow: var(--iuiyl-shadow);
        }

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

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

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

        .iuiyl-nav-menu {
            display: flex;
            list-style: none;
            gap: 16px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .iuiyl-nav-menu li a {
            text-decoration: none;
            color: var(--iuiyl-text-dark);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 6px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .iuiyl-nav-menu li a:hover {
            color: var(--iuiyl-primary);
            background: rgba(212, 63, 58, 0.05);
        }

        .iuiyl-nav-menu li a.iuiyl-active {
            color: var(--iuiyl-primary);
            background: rgba(212, 63, 58, 0.1);
        }

        /* Hero 区域 - 独特布局：中心对称搜索式 */
        .iuiyl-hero {
            padding: 160px 24px 80px;
            background: linear-gradient(135deg, #FFF5F5 0%, #FFFFFF 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .iuiyl-hero-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }

        .iuiyl-hero h1 {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            margin-bottom: 24px;
            word-break: keep-all;
            color: var(--iuiyl-text-dark);
        }

        .iuiyl-hero p {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--iuiyl-text-light);
            margin-bottom: 48px;
            word-break: break-word;
        }

        .iuiyl-search-box {
            max-width: 600px;
            margin: 0 auto;
            background: var(--iuiyl-white);
            padding: 8px;
            border-radius: 50px;
            display: flex;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            border: 1px solid rgba(212, 63, 58, 0.2);
            flex-wrap: wrap;
        }

        .iuiyl-search-box input {
            flex: 1;
            border: none;
            padding: 12px 24px;
            font-size: 16px;
            outline: none;
            border-radius: 50px;
            min-width: 200px;
        }

        .iuiyl-search-btn {
            background: var(--iuiyl-primary);
            color: white;
            border: none;
            padding: 12px 32px;
            border-radius: 50px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s;
            min-width: 100px;
        }

        .iuiyl-search-btn:hover {
            background: var(--iuiyl-primary-hover);
        }

        /* 快捷键分类区块 */
        .iuiyl-section {
            padding: 80px 24px;
            max-width: var(--iuiyl-container-width);
            margin: 0 auto;
        }

        .iuiyl-section-title {
            margin-bottom: 48px;
            text-align: left;
            border-left: 6px solid var(--iuiyl-primary);
            padding-left: 20px;
        }

        .iuiyl-section-title h2 {
            font-size: clamp(1.5rem, 2vw + 1rem, 2.25rem);
            margin-bottom: 8px;
        }

        /* 快捷键卡片布局 */
        .iuiyl-shortcut-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 24px;
        }

        .iuiyl-card {
            background: var(--iuiyl-white);
            border: 1px solid #EDF2F7;
            border-radius: var(--iuiyl-radius);
            padding: 32px;
            transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .iuiyl-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
            border-color: var(--iuiyl-primary);
        }

        .iuiyl-card-header {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
            gap: 12px;
        }

        .iuiyl-app-icon {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 20px;
        }

        .iuiyl-icon-w { background-color: #1E66D0; }
        .iuiyl-icon-s { background-color: #107C41; }
        .iuiyl-icon-p { background-color: #D35230; }

        .iuiyl-key-list {
            list-style: none;
        }

        .iuiyl-key-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px dashed #EEE;
            word-break: break-word;
        }

        .iuiyl-key-item:last-child {
            border-bottom: none;
        }

        .iuiyl-kbd-wrapper {
            display: flex;
            gap: 4px;
            align-items: center;
            flex-wrap: wrap;
            justify-content: flex-end;
            min-width: 0;
        }

        kbd {
            background-color: #F8FAFC;
            border: 1px solid #CBD5E1;
            border-bottom: 3px solid #CBD5E1;
            border-radius: 4px;
            padding: 2px 8px;
            font-size: 12px;
            font-family: monospace;
            color: var(--iuiyl-text-dark);
            box-shadow: 0 1px 0 rgba(0,0,0,0.1);
        }

        /* 用户路径区块 */
        .iuiyl-journey {
            background-color: var(--iuiyl-bg-gray);
            padding: 80px 24px;
        }

        .iuiyl-journey-container {
            max-width: var(--iuiyl-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }

        .iuiyl-step-card {
            flex: 1;
            min-width: 280px;
            background: var(--iuiyl-white);
            padding: 40px;
            border-radius: var(--iuiyl-radius);
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
        }

        .iuiyl-step-num {
            font-size: 48px;
            font-weight: 800;
            color: rgba(212, 63, 58, 0.1);
            line-height: 1;
            margin-bottom: 16px;
        }

        .iuiyl-step-card h3 {
            margin-bottom: 16px;
            color: var(--iuiyl-primary);
        }

        /* 页脚 */
        .iuiyl-footer {
            background: #1A1A1A;
            color: #999;
            padding: 80px 24px 40px;
        }

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

        .iuiyl-footer-brand {
            flex: 2;
            min-width: 240px;
        }

        .iuiyl-footer-brand h2 {
            color: var(--iuiyl-white);
            margin-bottom: 20px;
            font-size: 24px;
        }

        .iuiyl-footer-links {
            flex: 3;
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }

        .iuiyl-footer-col h4 {
            color: var(--iuiyl-white);
            margin-bottom: 20px;
            font-size: 16px;
        }

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

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

        .iuiyl-footer-col ul li a {
            color: #999;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .iuiyl-copyright {
            max-width: var(--iuiyl-container-width);
            margin: 60px auto 0;
            padding-top: 30px;
            border-top: 1px solid #333;
            text-align: center;
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .iuiyl-nav-container {
                height: auto;
                padding: 16px;
            }
            .iuiyl-nav-menu {
                margin-top: 16px;
                justify-content: center;
            }
            .iuiyl-hero {
                padding: 120px 24px 60px;
            }
            .iuiyl-shortcut-grid {
                grid-template-columns: 1fr;
            }
            .iuiyl-footer-content {
                flex-direction: column;
            }
        }