:root {
            --mpr9yq-primary: #A855F7;
            --mpr9yq-secondary: #6366F1;
            --mpr9yq-bg-dark: #0B0E14;
            --mpr9yq-bg-card: #161B22;
            --mpr9yq-text-main: #E6EDF3;
            --mpr9yq-text-dim: #8B949E;
            --mpr9yq-accent-gradient: linear-gradient(135deg, #A855F7 0%, #6366F1 100%);
            --mpr9yq-container-width: 1100px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--mpr9yq-bg-dark);
            color: var(--mpr9yq-text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 导航栏 */
        .mpr9yq-header {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 14, 20, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .mpr9yq-nav-container {
            max-width: var(--mpr9yq-container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }

        .mpr9yq-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .mpr9yq-logo img {
            height: 32px;
            width: auto;
        }

        .mpr9yq-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 16px;
            min-width: 0;
        }

        .mpr9yq-nav-menu li {
            min-width: 0;
        }

        .mpr9yq-nav-menu a {
            color: var(--mpr9yq-text-dim);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 8px 12px;
            border-radius: 6px;
            word-break: keep-all;
        }

        .mpr9yq-nav-menu a:hover {
            color: var(--mpr9yq-text-main);
            background: rgba(255, 255, 255, 0.05);
        }

        .mpr9yq-nav-menu a.active {
            color: var(--mpr9yq-primary);
            background: rgba(168, 85, 247, 0.1);
        }

        /* Hero 区域 */
        .mpr9yq-hero {
            padding: 160px 24px 80px;
            background: radial-gradient(circle at 50% 0%, rgba(168, 85, 247, 0.15) 0%, transparent 50%);
            text-align: center;
        }

        .mpr9yq-hero-content {
            max-width: 900px;
            margin: 0 auto;
            word-break: break-word;
        }

        .mpr9yq-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            font-weight: 800;
            margin-bottom: 24px;
            line-height: 1.2;
            background: linear-gradient(to bottom, #fff 40%, #a5a5a5 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .mpr9yq-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--mpr9yq-text-dim);
            max-width: 700px;
            margin: 0 auto 48px;
        }

        .mpr9yq-main-download-box {
            background: var(--mpr9yq-bg-card);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 24px;
            padding: 40px;
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            align-items: center;
            text-align: left;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
        }

        .mpr9yq-visual-wrapper {
            flex: 1;
            min-width: 300px;
        }

        .mpr9yq-visual-wrapper img {
            width: 100%;
            height: auto;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
        }

        .mpr9yq-download-actions {
            flex: 1;
            min-width: 300px;
        }

        .mpr9yq-btn-primary {
            display: inline-block;
            background: var(--mpr9yq-accent-gradient);
            color: white;
            padding: 16px 32px;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            margin-bottom: 16px;
        }

        .mpr9yq-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(168, 85, 247, 0.3);
        }

        .mpr9yq-version-tag {
            font-size: 0.9rem;
            color: var(--mpr9yq-text-dim);
            display: block;
            margin-top: 8px;
        }

        /* 平台矩阵 */
        .mpr9yq-section {
            padding: 80px 24px;
            max-width: var(--mpr9yq-container-width);
            margin: 0 auto;
        }

        .mpr9yq-os-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            margin-top: 48px;
        }

        .mpr9yq-os-card {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: 16px;
            padding: 32px;
            transition: all 0.3s ease;
        }

        .mpr9yq-os-card:hover {
            border-color: var(--mpr9yq-primary);
            background: rgba(168, 85, 247, 0.03);
        }

        .mpr9yq-os-img {
            width: 64px;
            height: auto;
            margin-bottom: 20px;
        }

        /* 协议矩阵 */
        .mpr9yq-matrix-container {
            background: #10141B;
            border-radius: 24px;
            padding: 48px;
            margin-top: 40px;
        }

        .mpr9yq-matrix-row {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            padding: 32px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .mpr9yq-matrix-row:last-child {
            border-bottom: none;
        }

        .mpr9yq-matrix-label {
            flex: 0 0 200px;
            font-weight: 700;
            color: var(--mpr9yq-primary);
            min-width: 0;
        }

        .mpr9yq-matrix-content {
            flex: 1;
            min-width: 280px;
        }

        .mpr9yq-tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 12px;
        }

        .mpr9yq-tag {
            background: rgba(255, 255, 255, 0.05);
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 0.85rem;
            color: var(--mpr9yq-text-main);
        }

        /* 功能展示 */
        .mpr9yq-features-showcase {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-top: 64px;
        }

        .mpr9yq-feature-item {
            position: relative;
            padding-left: 24px;
            border-left: 2px solid var(--mpr9yq-primary);
        }

        .mpr9yq-feature-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .mpr9yq-feature-desc {
            color: var(--mpr9yq-text-dim);
            font-size: 0.95rem;
            margin-bottom: 8px;
        }

        .mpr9yq-feature-value {
            font-size: 0.85rem;
            color: var(--mpr9yq-primary);
            font-style: italic;
        }

        /* 授权区块 */
        .mpr9yq-license-box {
            margin-top: 80px;
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            align-items: center;
            background: linear-gradient(to right, rgba(168, 85, 247, 0.05), transparent);
            border-radius: 32px;
            padding: 64px;
        }

        .mpr9yq-license-text {
            flex: 1;
            min-width: 300px;
        }

        .mpr9yq-license-img {
            flex: 1;
            min-width: 300px;
        }

        .mpr9yq-license-img img {
            width: 100%;
            height: auto;
            border-radius: 16px;
        }

        /* 页脚 */
        .mpr9yq-footer {
            background: #05070A;
            padding: 80px 24px 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
        }

        .mpr9yq-footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--mpr9yq-text-main);
        }

        .mpr9yq-footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 32px;
            margin-bottom: 40px;
        }

        .mpr9yq-footer-links a {
            color: var(--mpr9yq-text-dim);
            text-decoration: none;
            font-size: 0.9rem;
        }

        .mpr9yq-footer-copyright {
            color: #4B5563;
            font-size: 0.8rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .mpr9yq-nav-menu {
                display: none; /* 简化移动端，实际开发中会加汉堡菜单 */
            }
            .mpr9yq-hero {
                padding-top: 120px;
            }
            .mpr9yq-main-download-box {
                padding: 24px;
            }
            .mpr9yq-license-box {
                padding: 32px;
            }
        }