:root {
            --wxmha-primary: #D42E22;
            --wxmha-primary-light: #FFEDED;
            --wxmha-dark: #1D1D1F;
            --wxmha-gray: #86868B;
            --wxmha-light-bg: #F5F5F7;
            --wxmha-white: #FFFFFF;
            --wxmha-radius: 16px;
            --wxmha-shadow: 0 10px 30px rgba(0,0,0,0.05);
            --wxmha-transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", sans-serif;
            background-color: var(--wxmha-white);
            color: var(--wxmha-dark);
            line-height: 1.6;
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* 导航栏 */
        .wxmha-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding: 0 5vw;
        }

        .wxmha-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            height: 72px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

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

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

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

        .wxmha-nav-item a {
            text-decoration: none;
            color: var(--wxmha-dark);
            font-size: 15px;
            font-weight: 500;
            transition: var(--wxmha-transition);
            position: relative;
        }

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

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

        .wxmha-nav-item.active a::after {
            content: '';
            position: absolute;
            bottom: -25px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--wxmha-primary);
        }

        /* Hero 区域 - 独特视觉 */
        .wxmha-hero {
            padding: 160px 5vw 80px;
            background: radial-gradient(circle at top right, var(--wxmha-primary-light), transparent);
            text-align: center;
        }

        .wxmha-hero-inner {
            max-width: 900px;
            margin: 0 auto;
        }

        .wxmha-hero-tag {
            display: inline-block;
            background: var(--wxmha-primary-light);
            color: var(--wxmha-primary);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .wxmha-hero-title {
            font-size: clamp(2.5rem, 5vw, 4rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
            word-break: break-word;
        }

        .wxmha-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
            color: var(--wxmha-gray);
            max-width: 700px;
            margin: 0 auto 48px;
            word-break: break-word;
        }

        /* 快捷键搜索/过滤区 */
        .wxmha-filter-bar {
            background: var(--wxmha-white);
            padding: 16px;
            border-radius: 24px;
            box-shadow: var(--wxmha-shadow);
            display: flex;
            justify-content: center;
            gap: 12px;
            max-width: 800px;
            margin: -40px auto 64px;
            flex-wrap: wrap;
        }

        .wxmha-filter-btn {
            border: none;
            padding: 12px 24px;
            border-radius: 12px;
            background: var(--wxmha-light-bg);
            color: var(--wxmha-dark);
            font-weight: 600;
            cursor: pointer;
            transition: var(--wxmha-transition);
        }

        .wxmha-filter-btn:hover, .wxmha-filter-btn.active {
            background: var(--wxmha-primary);
            color: var(--wxmha-white);
        }

        /* 内容板块布局 */
        .wxmha-main-grid {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 5vw 96px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .wxmha-app-section {
            background: var(--wxmha-light-bg);
            border-radius: var(--wxmha-radius);
            padding: 40px;
            transition: var(--wxmha-transition);
            border: 1px solid transparent;
            min-width: 0;
            word-break: break-word;
        }

        .wxmha-app-section:hover {
            background: var(--wxmha-white);
            border-color: var(--wxmha-primary-light);
            box-shadow: var(--wxmha-shadow);
            transform: translateY(-8px);
        }

        .wxmha-app-header {
            margin-bottom: 32px;
        }

        .wxmha-app-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .wxmha-app-desc {
            font-size: 15px;
            color: var(--wxmha-gray);
            margin-bottom: 20px;
        }

        .wxmha-shortcut-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .wxmha-shortcut-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 12px;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            min-width: 0;
        }

        .wxmha-key-name {
            font-weight: 500;
            color: var(--wxmha-dark);
            font-size: 15px;
            margin-right: 16px;
            flex-shrink: 0;
        }

        .wxmha-key-combo {
            display: flex;
            gap: 4px;
            flex-wrap: wrap;
            justify-content: flex-end;
        }

        .wxmha-kbd {
            background: var(--wxmha-white);
            border: 1px solid #d1d1d6;
            border-bottom-width: 3px;
            border-radius: 6px;
            padding: 4px 8px;
            font-size: 12px;
            font-weight: 700;
            color: var(--wxmha-dark);
            min-width: 30px;
            text-align: center;
        }

        /* 动态内容区块 */
        .wxmha-dynamic-wrapper {
            background: var(--wxmha-dark);
            color: var(--wxmha-white);
            padding: 96px 5vw;
        }

        .wxmha-section-header {
            max-width: 1400px;
            margin: 0 auto 48px;
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            flex-wrap: wrap;
            gap: 24px;
        }

        .wxmha-section-title {
            font-size: 36px;
            font-weight: 700;
        }

        .wxmha-news-grid {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .wxmha-news-card {
            background: rgba(255,255,255,0.05);
            padding: 32px;
            border-radius: var(--wxmha-radius);
            transition: var(--wxmha-transition);
            border: 1px solid rgba(255,255,255,0.1);
        }

        .wxmha-news-card:hover {
            background: rgba(255,255,255,0.1);
            transform: scale(1.02);
        }

        .wxmha-news-date {
            color: var(--wxmha-primary);
            font-size: 14px;
            margin-bottom: 12px;
            display: block;
        }

        .wxmha-news-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 16px;
            word-break: break-word;
        }

        /* 页脚 */
        .wxmha-footer {
            padding: 80px 5vw 40px;
            background: var(--wxmha-light-bg);
            border-top: 1px solid rgba(0,0,0,0.05);
        }

        .wxmha-footer-inner {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
        }

        .wxmha-footer-brand h2 {
            font-size: 20px;
            margin-bottom: 16px;
        }

        .wxmha-footer-brand p {
            font-size: 14px;
            color: var(--wxmha-gray);
            max-width: 300px;
        }

        .wxmha-footer-links h4 {
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 24px;
            color: var(--wxmha-dark);
        }

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

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

        .wxmha-footer-links a {
            text-decoration: none;
            color: var(--wxmha-gray);
            font-size: 14px;
            transition: var(--wxmha-transition);
        }

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

        .wxmha-copyright {
            max-width: 1400px;
            margin: 64px auto 0;
            padding-top: 32px;
            border-top: 1px solid rgba(0,0,0,0.05);
            text-align: center;
            font-size: 13px;
            color: var(--wxmha-gray);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .wxmha-nav-list {
                display: none; /* 简化移动端，实际项目中应有汉堡菜单 */
            }
            .wxmha-hero {
                padding-top: 120px;
            }
            .wxmha-app-section {
                padding: 24px;
            }
            .wxmha-filter-bar {
                margin-top: 0;
                padding: 8px;
            }
            .wxmha-filter-btn {
                padding: 8px 16px;
                font-size: 13px;
            }
        }