/* 变量与基础重置 */
        :root {
            --rh3o-primary: #1880C4;
            --rh3o-primary-dark: #005691;
            --rh3o-accent: #F8B400;
            --rh3o-bg-light: #F4F7F9;
            --rh3o-text-main: #2C3E50;
            --rh3o-text-muted: #5D6D7E;
            --rh3o-white: #FFFFFF;
            --rh3o-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --rh3o-radius: 16px;
            --rh3o-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            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;
            line-height: 1.6;
            color: var(--rh3o-text-main);
            background-color: var(--rh3o-bg-light);
            word-break: break-word;
            overflow-x: hidden;
        }

        /* 布局容器 */
        .rh3o-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 导航栏 */
        .rh3o-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            box-shadow: var(--rh3o-shadow);
        }

        .rh3o-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }

        .rh3o-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .rh3o-logo img {
            height: 40px;
            display: block;
        }

        .rh3o-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 16px;
        }

        .rh3o-menu-item a {
            text-decoration: none;
            color: var(--rh3o-text-main);
            font-size: clamp(0.9rem, 1vw + 0.1rem, 1rem);
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 8px;
            transition: var(--rh3o-transition);
        }

        .rh3o-menu-item a:hover {
            color: var(--rh3o-primary);
            background: rgba(24, 128, 196, 0.05);
        }

        .rh3o-menu-item.active a {
            color: var(--rh3o-primary);
            background: rgba(24, 128, 196, 0.1);
            font-weight: 700;
        }

        /* Hero 区域 - 独特视觉 */
        .rh3o-hero {
            padding: 96px 0 64px;
            background: linear-gradient(135deg, #1880C4 0%, #003764 100%);
            color: var(--rh3o-white);
            position: relative;
            overflow: hidden;
        }

        .rh3o-hero::after {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background-image: radial-gradient(circle at 20% 30%, rgba(255,255,255,0.1) 0%, transparent 50%);
            pointer-events: none;
        }

        .rh3o-hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .rh3o-hero-text {
            flex: 1;
            min-width: 300px;
        }

        .rh3o-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            margin-bottom: 24px;
            font-weight: 800;
        }

        .rh3o-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.35rem);
            opacity: 0.9;
            margin-bottom: 32px;
            max-width: 600px;
        }

        .rh3o-hero-badge {
            display: inline-block;
            background: var(--rh3o-accent);
            color: #000;
            padding: 6px 16px;
            border-radius: 50px;
            font-weight: bold;
            font-size: 0.85rem;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        /* 核心下载卡片 */
        .rh3o-download-card {
            background: var(--rh3o-white);
            padding: 48px;
            border-radius: var(--rh3o-radius);
            box-shadow: 0 20px 50px rgba(0,0,0,0.2);
            color: var(--rh3o-text-main);
            margin-top: -80px;
            position: relative;
            z-index: 10;
        }

        .rh3o-card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
        }

        .rh3o-download-item {
            padding: 24px;
            border: 2px solid #F0F2F5;
            border-radius: 12px;
            transition: var(--rh3o-transition);
        }

        .rh3o-download-item:hover {
            border-color: var(--rh3o-primary);
            transform: translateY(-5px);
        }

        .rh3o-item-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--rh3o-primary);
        }

        .rh3o-btn {
            display: inline-block;
            padding: 14px 28px;
            background: var(--rh3o-primary);
            color: var(--rh3o-white);
            text-decoration: none;
            border-radius: 8px;
            font-weight: 600;
            transition: var(--rh3o-transition);
            border: none;
            cursor: pointer;
            text-align: center;
        }

        .rh3o-btn:hover {
            background: var(--rh3o-primary-dark);
            box-shadow: 0 5px 15px rgba(24, 128, 196, 0.3);
        }

        /* 部署矩阵区块 */
        .rh3o-matrix-section {
            padding: 96px 0;
        }

        .rh3o-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .rh3o-section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .rh3o-matrix-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .rh3o-matrix-card {
            flex: 1;
            min-width: 320px;
            background: var(--rh3o-white);
            padding: 32px;
            border-radius: var(--rh3o-radius);
            box-shadow: var(--rh3o-shadow);
        }

        .rh3o-matrix-sector {
            font-size: 0.8rem;
            color: var(--rh3o-primary);
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 12px;
            display: block;
        }

        .rh3o-matrix-usecase {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .rh3o-matrix-detail {
            font-size: 0.95rem;
            color: var(--rh3o-text-muted);
            margin-bottom: 24px;
        }

        .rh3o-key-tool {
            display: inline-flex;
            align-items: center;
            background: #F0F7FF;
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--rh3o-primary-dark);
        }

        /* 安装步骤 */
        .rh3o-steps {
            padding: 96px 0;
            background: #fff;
        }

        .rh3o-step-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 48px;
            counter-reset: step-counter;
        }

        .rh3o-step-card {
            position: relative;
            padding-top: 40px;
        }

        .rh3o-step-card::before {
            counter-increment: step-counter;
            content: counter(step-counter);
            position: absolute;
            top: 0;
            left: 0;
            width: 40px;
            height: 40px;
            background: var(--rh3o-primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
        }

        /* 页脚 */
        .rh3o-footer {
            background: #1A1A1A;
            color: #ADB5BD;
            padding: 80px 0 40px;
        }

        .rh3o-footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 64px;
        }

        .rh3o-footer-brand {
            flex: 2;
            min-width: 280px;
        }

        .rh3o-footer-brand-name {
            color: #fff;
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 20px;
        }

        .rh3o-footer-links {
            flex: 1;
            min-width: 150px;
        }

        .rh3o-footer-links h4 {
            color: #fff;
            margin-bottom: 24px;
        }

        .rh3o-footer-links ul {
            list-style: none;
        }

        .rh3o-footer-links li {
            margin-bottom: 12px;
        }

        .rh3o-footer-links a {
            color: #ADB5BD;
            text-decoration: none;
            transition: var(--rh3o-transition);
        }

        .rh3o-footer-links a:hover {
            color: var(--rh3o-primary);
        }

        .rh3o-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .rh3o-nav-wrapper { height: auto; padding: 16px 0; }
            .rh3o-menu { width: 100%; order: 3; margin-top: 16px; gap: 8px; }
            .rh3o-menu-item { flex: 1 1 45%; }
            .rh3o-hero { text-align: center; }
            .rh3o-hero-content { justify-content: center; }
            .rh3o-download-card { margin-top: 0; border-radius: 0; padding: 24px; }
            .rh3o-matrix-card { min-width: 100%; }
        }