:root {
            --qdmij8-primary: #38bdf8;
            --qdmij8-bg: #0a0a0a;
            --qdmij8-card-bg: #161616;
            --qdmij8-text-main: #f1f5f9;
            --qdmij8-text-muted: #94a3b8;
            --qdmij8-accent: #818cf8;
            --qdmij8-border: #262626;
            --qdmij8-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            --qdmij8-font-mono: 'JetBrains Mono', 'Fira Code', monospace;
        }

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

        body {
            background-color: var(--qdmij8-bg);
            color: var(--qdmij8-text-main);
            font-family: var(--qdmij8-font-sans);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航系统 */
        .qdmij8-nav-wrapper {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 10, 10, 0.8);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--qdmij8-border);
        }

        .qdmij8-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            height: 72px;
        }

        .qdmij8-logo {
            flex: 0 0 auto;
            min-width: 0;
            display: flex;
            align-items: center;
        }

        .qdmij8-logo img {
            height: 32px;
            width: auto;
            display: block;
        }

        .qdmij8-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
            min-width: 0;
        }

        .qdmij8-menu-item a {
            text-decoration: none;
            color: var(--qdmij8-text-muted);
            font-size: 0.9rem;
            padding: 8px 12px;
            border-radius: 6px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .qdmij8-menu-item a:hover {
            color: var(--qdmij8-primary);
            background: rgba(56, 189, 248, 0.1);
        }

        .qdmij8-menu-item a.active {
            color: var(--qdmij8-text-main);
            background: rgba(255, 255, 255, 0.05);
            font-weight: 600;
        }

        /* Hero 区块 - 全屏非对称布局 */
        .qdmij8-hero {
            padding: 160px 24px 80px;
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            min-height: 80vh;
        }

        .qdmij8-hero-content {
            flex: 1;
            min-width: 320px;
            padding-right: 48px;
        }

        .qdmij8-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #fff 0%, #38bdf8 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            word-break: break-word;
        }

        .qdmij8-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.4rem);
            color: var(--qdmij8-text-muted);
            max-width: 600px;
            margin-bottom: 40px;
            word-break: break-word;
        }

        .qdmij8-hero-visual {
            flex: 1;
            min-width: 320px;
            position: relative;
        }

        /* 模拟 Composer 窗口 */
        .qdmij8-composer-mockup {
            background: #1e1e1e;
            border: 1px solid var(--qdmij8-border);
            border-radius: 12px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            padding: 24px;
            font-family: var(--qdmij8-font-mono);
            position: relative;
            overflow: hidden;
        }

        .qdmij8-mockup-header {
            display: flex;
            gap: 8px;
            margin-bottom: 16px;
        }

        .qdmij8-dot { width: 12px; height: 12px; border-radius: 50%; }
        .qdmij8-dot-red { background: #ff5f56; }
        .qdmij8-dot-yellow { background: #ffbd2e; }
        .qdmij8-dot-green { background: #27c93f; }

        .qdmij8-mockup-content {
            color: #d1d5db;
            font-size: 0.9rem;
        }

        .qdmij8-cursor-line {
            border-left: 2px solid var(--qdmij8-primary);
            padding-left: 8px;
            animation: qdmij8-blink 1s infinite;
        }

        /* 快捷键网格布局 - Bento Style */
        .qdmij8-section {
            padding: 80px 24px;
            max-width: 1100px;
            margin: 0 auto;
        }

        .qdmij8-section-header {
            margin-bottom: 48px;
            text-align: center;
        }

        .qdmij8-section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .qdmij8-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .qdmij8-card {
            background: var(--qdmij8-card-bg);
            border: 1px solid var(--qdmij8-border);
            border-radius: 16px;
            padding: 32px;
            transition: transform 0.3s ease, border-color 0.3s ease;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .qdmij8-card:hover {
            transform: translateY(-8px);
            border-color: var(--qdmij8-primary);
        }

        .qdmij8-kbd-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 20px;
        }

        .qdmij8-kbd {
            background: #2d2d2d;
            border: 1px solid #404040;
            border-bottom: 3px solid #1a1a1a;
            border-radius: 6px;
            padding: 4px 10px;
            font-family: var(--qdmij8-font-mono);
            font-size: 0.9rem;
            color: var(--qdmij8-primary);
        }

        .qdmij8-card-title {
            font-size: 1.25rem;
            margin-bottom: 12px;
            color: var(--qdmij8-text-main);
        }

        .qdmij8-card-desc {
            font-size: 0.95rem;
            color: var(--qdmij8-text-muted);
            line-height: 1.6;
        }

        /* 核心创新区块 */
        .qdmij8-innovation-strip {
            background: linear-gradient(90deg, #111 0%, #1a1a1a 100%);
            padding: 64px 24px;
            margin: 48px 0;
            border-y: 1px solid var(--qdmij8-border);
        }

        .qdmij8-innovation-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
        }

        .qdmij8-innovation-item {
            flex: 1;
            min-width: 280px;
        }

        .qdmij8-innovation-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(129, 140, 248, 0.1);
            color: var(--qdmij8-accent);
            border-radius: 20px;
            font-size: 0.8rem;
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* 页脚 */
        .qdmij8-footer {
            padding: 80px 24px 40px;
            border-top: 1px solid var(--qdmij8-border);
            max-width: 1400px;
            margin: 0 auto;
        }

        .qdmij8-footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 48px;
        }

        .qdmij8-footer-brand {
            flex: 1;
            min-width: 240px;
        }

        .qdmij8-footer-brand-name {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .qdmij8-footer-links {
            flex: 2;
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            min-width: 0;
        }

        .qdmij8-footer-col {
            min-width: 140px;
        }

        .qdmij8-footer-col h4 {
            margin-bottom: 20px;
            font-size: 0.9rem;
            color: var(--qdmij8-text-muted);
        }

        .qdmij8-footer-col ul {
            list-style: none;
        }

        .qdmij8-footer-col li {
            margin-bottom: 12px;
        }

        .qdmij8-footer-col a {
            text-decoration: none;
            color: var(--qdmij8-text-main);
            font-size: 0.9rem;
            transition: color 0.3s;
        }

        .qdmij8-footer-col a:hover {
            color: var(--qdmij8-primary);
        }

        .qdmij8-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid var(--qdmij8-border);
            color: var(--qdmij8-text-muted);
            font-size: 0.85rem;
        }

        /* 动画 */
        @keyframes qdmij8-blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0; }
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .qdmij8-nav-container { height: auto; padding: 16px 24px; }
            .qdmij8-menu { width: 100%; order: 3; margin-top: 16px; }
            .qdmij8-hero { padding-top: 120px; text-align: center; }
            .qdmij8-hero-content { padding-right: 0; margin-bottom: 48px; }
            .qdmij8-hero-subtitle { margin-left: auto; margin-right: auto; }
            .qdmij8-innovation-container { flex-direction: column; }
        }