:root {
            --f8a5-primary: #ff4c22;
            --f8a5-primary-hover: #e63e16;
            --f8a5-secondary: #2b303b;
            --f8a5-bg-light: #f8faff;
            --f8a5-text-main: #333333;
            --f8a5-text-muted: #666666;
            --f8a5-white: #ffffff;
            --f8a5-shadow: 0 10px 30px rgba(0,0,0,0.05);
            --f8a5-radius: 16px;
            --f8a5-container-width: 1300px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--f8a5-bg-light);
            color: var(--f8a5-text-main);
            line-height: 1.7;
            overflow-x: hidden;
        }

        /* 导航栏样式 */
        .f8a5-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 80px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .f8a5-nav-container {
            width: var(--f8a5-container-width);
            max-width: 95vw;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
        }

        .f8a5-logo {
            flex-shrink: 0;
            min-width: 0;
        }

        .f8a5-logo img {
            height: 32px;
            width: auto;
            display: block;
        }

        .f8a5-nav-menu {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            list-style: none;
            min-width: 0;
        }

        .f8a5-nav-menu li {
            min-width: 0;
        }

        .f8a5-nav-menu a {
            text-decoration: none;
            color: var(--f8a5-text-main);
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            border-radius: 8px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .f8a5-nav-menu a:hover {
            color: var(--f8a5-primary);
            background: rgba(255, 76, 34, 0.05);
        }

        .f8a5-nav-menu a.active {
            color: var(--f8a5-white);
            background: var(--f8a5-primary);
        }

        /* Hero 区块 - 独特非对称布局 */
        .f8a5-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: linear-gradient(135deg, #fff 0%, #fff5f2 100%);
            display: flex;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .f8a5-hero-content {
            width: var(--f8a5-container-width);
            max-width: 95vw;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .f8a5-hero-text {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        .f8a5-hero-text h1 {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            color: var(--f8a5-secondary);
            margin-bottom: 24px;
            word-break: keep-all;
        }

        .f8a5-hero-text p {
            font-size: clamp(1rem, 1vw + 0.5rem, 1.25rem);
            color: var(--f8a5-text-muted);
            margin-bottom: 32px;
            max-width: 600px;
        }

        .f8a5-hero-visual {
            flex: 1;
            min-width: 320px;
            display: flex;
            justify-content: center;
            position: relative;
        }

        /* 模拟键盘快捷键装饰 */
        .f8a5-key-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            perspective: 1000px;
        }

        .f8a5-key-item {
            background: var(--f8a5-white);
            padding: 32px;
            border-radius: var(--f8a5-radius);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            text-align: center;
            transition: transform 0.4s ease;
            cursor: default;
        }

        .f8a5-key-item:hover {
            transform: translateY(-10px) rotateX(5deg);
        }

        .f8a5-key-code {
            display: block;
            font-size: 24px;
            font-weight: 800;
            color: var(--f8a5-primary);
            margin-bottom: 8px;
        }

        .f8a5-key-desc {
            font-size: 14px;
            color: var(--f8a5-text-muted);
        }

        /* 快捷键列表区块 */
        .f8a5-section {
            padding: 96px 0;
            display: flex;
            justify-content: center;
        }

        .f8a5-inner {
            width: var(--f8a5-container-width);
            max-width: 95vw;
            padding: 0 24px;
        }

        .f8a5-section-title {
            text-align: left;
            margin-bottom: 64px;
            border-left: 6px solid var(--f8a5-primary);
            padding-left: 24px;
        }

        .f8a5-section-title h2 {
            font-size: 32px;
            margin-bottom: 8px;
        }

        .f8a5-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
            gap: 32px;
        }

        .f8a5-card {
            background: var(--f8a5-white);
            border-radius: var(--f8a5-radius);
            padding: 40px;
            box-shadow: var(--f8a5-shadow);
            border: 1px solid rgba(0,0,0,0.03);
            transition: all 0.3s ease;
            min-width: 0;
            word-break: break-word;
        }

        .f8a5-card:hover {
            box-shadow: 0 15px 40px rgba(255, 76, 34, 0.1);
            transform: translateY(-5px);
        }

        .f8a5-card h3 {
            font-size: 22px;
            margin-bottom: 24px;
            color: var(--f8a5-primary);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .f8a5-shortcut-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
            border-bottom: 1px dashed #eee;
        }

        .f8a5-shortcut-row:last-child {
            border-bottom: none;
        }

        .f8a5-shortcut-label {
            color: var(--f8a5-text-main);
            font-weight: 500;
        }

        .f8a5-shortcut-keys {
            background: #f0f2f5;
            padding: 4px 10px;
            border-radius: 6px;
            font-family: monospace;
            font-size: 14px;
            color: var(--f8a5-secondary);
            border-bottom: 2px solid #ddd;
        }

        /* 动态资讯区块 */
        .f8a5-dynamic-bg {
            background: var(--f8a5-secondary);
            color: var(--f8a5-white);
        }

        .f8a5-dynamic-bg .f8a5-section-title h2 {
            color: var(--f8a5-white);
        }

        .f8a5-news-list {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .f8a5-news-item {
            flex: 1;
            min-width: 300px;
            background: rgba(255,255,255,0.05);
            padding: 24px;
            border-radius: 12px;
            text-decoration: none;
            color: var(--f8a5-white);
            transition: background 0.3s ease;
        }

        .f8a5-news-item:hover {
            background: rgba(255,255,255,0.1);
        }

        .f8a5-news-date {
            font-size: 13px;
            opacity: 0.6;
            margin-bottom: 8px;
            display: block;
        }

        /* 底部 */
        .f8a5-footer {
            padding: 64px 0 32px;
            background: #fff;
            text-align: center;
            border-top: 1px solid #eee;
        }

        .f8a5-footer-brand {
            font-size: 24px;
            font-weight: 700;
            color: var(--f8a5-primary);
            margin-bottom: 16px;
        }

        .f8a5-footer-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 24px;
            margin-bottom: 32px;
        }

        .f8a5-footer-links a {
            text-decoration: none;
            color: var(--f8a5-text-muted);
            font-size: 14px;
        }

        .f8a5-copyright {
            font-size: 13px;
            color: #999;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .f8a5-hero-content {
                flex-direction: column;
                text-align: center;
            }
            .f8a5-hero-text h1 {
                text-align: center;
            }
            .f8a5-hero-text p {
                margin: 0 auto 32px;
            }
            .f8a5-section-title {
                text-align: center;
                border-left: none;
                border-bottom: 4px solid var(--f8a5-primary);
                padding-left: 0;
                padding-bottom: 16px;
            }
        }

        @media (max-width: 768px) {
            .f8a5-nav-menu {
                display: none; /* 简化移动端，实际项目中应有汉堡菜单 */
            }
            .f8a5-grid {
                grid-template-columns: 1fr;
            }
            .f8a5-hero {
                padding-top: 120px;
                padding-bottom: 64px;
            }
            .f8a5-key-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }