/* 变量定义 */
        :root {
            --zpa57-primary: #3b82f6;
            --zpa57-secondary: #10b981;
            --zpa57-accent: #f59e0b;
            --zpa57-dark: #0f172a;
            --zpa57-light: #f8fafc;
            --zpa57-gray: #64748b;
            --zpa57-card-bg: rgba(255, 255, 255, 0.05);
            --zpa57-terminal-header: #334155;
            --zpa57-font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        }

        /* 基础重置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: var(--zpa57-font-main);
            background-color: #020617;
            color: var(--zpa57-light);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        .zpa57-container {
            width: 92vw;
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航栏设计 */
        .zpa57-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .zpa57-nav-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }

        .zpa57-logo {
            min-width: 0;
            display: flex;
            align-items: center;
        }

        .zpa57-logo img {
            height: 40px;
            width: auto;
            object-fit: contain;
        }

        .zpa57-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 16px;
        }

        .zpa57-nav-item a {
            color: var(--zpa57-gray);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 8px 12px;
            border-radius: 6px;
        }

        .zpa57-nav-item a:hover {
            color: var(--zpa57-primary);
            background: rgba(59, 130, 246, 0.1);
        }

        .zpa57-nav-item a.zpa57-active {
            color: var(--zpa57-light);
            background: var(--zpa57-primary);
        }

        /* Hero 区域：终端视觉风格 */
        .zpa57-hero {
            padding: 140px 0 80px;
            background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.15), transparent),
                        radial-gradient(circle at bottom left, rgba(16, 185, 129, 0.1), transparent);
            text-align: center;
        }

        .zpa57-hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(59, 130, 246, 0.2);
            border: 1px solid var(--zpa57-primary);
            border-radius: 20px;
            color: var(--zpa57-primary);
            font-size: 14px;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .zpa57-hero-title {
            font-size: clamp(2rem, 5vw + 1rem, 4rem);
            font-weight: 800;
            margin-bottom: 24px;
            line-height: 1.1;
            background: linear-gradient(to right, #fff, #94a3b8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .zpa57-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--zpa57-gray);
            max-width: 800px;
            margin: 0 auto 48px;
            word-break: break-word;
        }

        /* 快捷键搜索/过滤模拟 */
        .zpa57-search-bar {
            max-width: 600px;
            margin: 0 auto 64px;
            position: relative;
            background: var(--zpa57-card-bg);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 12px 24px;
            border-radius: 12px;
            display: flex;
            align-items: center;
        }

        .zpa57-search-bar span {
            color: var(--zpa57-secondary);
            font-family: monospace;
            margin-right: 12px;
        }

        .zpa57-search-input {
            background: transparent;
            border: none;
            color: white;
            font-size: 16px;
            width: 100%;
            outline: none;
        }

        /* 快捷键网格布局 */
        .zpa57-section-title {
            font-size: 28px;
            margin-bottom: 32px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .zpa57-section-title::before {
            content: "";
            width: 4px;
            height: 24px;
            background: var(--zpa57-primary);
            border-radius: 2px;
        }

        .zpa57-shortcut-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
            margin-bottom: 64px;
        }

        .zpa57-shortcut-card {
            background: var(--zpa57-card-bg);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: 16px;
            padding: 24px;
            transition: transform 0.3s ease, border-color 0.3s ease;
            min-width: 0;
        }

        .zpa57-shortcut-card:hover {
            transform: translateY(-5px);
            border-color: rgba(59, 130, 246, 0.4);
            background: rgba(255, 255, 255, 0.08);
        }

        .zpa57-card-header {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--zpa57-secondary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding-bottom: 12px;
        }

        .zpa57-shortcut-list {
            list-style: none;
        }

        .zpa57-shortcut-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
            gap: 12px;
        }

        .zpa57-shortcut-label {
            color: var(--zpa57-gray);
            font-size: 14px;
            flex: 1;
            word-break: break-word;
        }

        .zpa57-kbd-group {
            display: flex;
            gap: 4px;
            flex-shrink: 0;
        }

        .zpa57-kbd {
            background: linear-gradient(180deg, #334155 0%, #1e293b 100%);
            border: 1px solid #475569;
            border-bottom: 3px solid #0f172a;
            border-radius: 4px;
            padding: 4px 8px;
            font-size: 12px;
            font-family: monospace;
            color: #f1f5f9;
            min-width: 32px;
            text-align: center;
            box-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }

        /* 提示区块 */
        .zpa57-pro-tip {
            background: linear-gradient(90deg, rgba(59, 130, 246, 0.1), rgba(16, 185, 129, 0.1));
            border-left: 4px solid var(--zpa57-primary);
            padding: 32px;
            border-radius: 0 16px 16px 0;
            margin: 64px 0;
        }

        .zpa57-pro-tip h3 {
            margin-bottom: 16px;
            color: var(--zpa57-light);
        }

        .zpa57-pro-tip p {
            color: var(--zpa57-gray);
            max-width: 900px;
        }

        /* 协议矩阵展示区 */
        .zpa57-matrix-section {
            padding: 80px 0;
            background: rgba(255, 255, 255, 0.02);
            border-radius: 32px;
            margin: 48px 0;
        }

        .zpa57-matrix-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            margin-top: 40px;
        }

        .zpa57-matrix-item {
            flex: 1;
            min-width: 300px;
            background: #0f172a;
            padding: 32px;
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.05);
        }

        .zpa57-tag-container {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 16px;
        }

        .zpa57-tag {
            font-size: 12px;
            padding: 4px 10px;
            background: rgba(59, 130, 246, 0.1);
            color: var(--zpa57-primary);
            border-radius: 4px;
        }

        /* 页脚 */
        .zpa57-footer {
            padding: 80px 0 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 80px;
        }

        .zpa57-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 48px;
        }

        .zpa57-footer-brand h2 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--zpa57-light);
        }

        .zpa57-footer-links h4 {
            margin-bottom: 20px;
            font-size: 16px;
        }

        .zpa57-footer-links ul {
            list-style: none;
        }

        .zpa57-footer-links li {
            margin-bottom: 12px;
        }

        .zpa57-footer-links a {
            color: var(--zpa57-gray);
            text-decoration: none;
            transition: color 0.3s;
        }

        .zpa57-footer-links a:hover {
            color: var(--zpa57-primary);
        }

        .zpa57-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--zpa57-gray);
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .zpa57-nav-inner {
                height: auto;
                padding: 16px 0;
            }
            .zpa57-nav-menu {
                margin-top: 16px;
                gap: 8px;
                justify-content: center;
            }
            .zpa57-hero {
                padding: 100px 0 40px;
            }
            .zpa57-shortcut-grid {
                grid-template-columns: 1fr;
            }
        }

        /* JSON-LD 结构化数据 */