:root {
            --rh3o-primary: #1867c0;
            --rh3o-secondary: #ff9800;
            --rh3o-dark: #212121;
            --rh3o-light: #f8f9fa;
            --rh3o-accent: #00bcd4;
            --rh3o-text: #333333;
            --rh3o-spacing: 8px;
            --rh3o-radius: 12px;
            --rh3o-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            color: var(--rh3o-text);
            background-color: #ffffff;
            word-break: keep-all;
            overflow-wrap: break-word;
        }

        /* 导航系统 */
        .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);
            padding: calc(var(--rh3o-spacing) * 2) 0;
        }

        .rh3o-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 5vw;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }

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

        .rh3o-logo img {
            height: 48px;
            width: auto;
            display: block;
        }

        .rh3o-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: calc(var(--rh3o-spacing) * 3);
        }

        .rh3o-menu-item {
            min-width: 0;
        }

        .rh3o-menu-link {
            text-decoration: none;
            color: var(--rh3o-dark);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--rh3o-transition);
            position: relative;
            padding: 4px 0;
        }

        .rh3o-menu-link:hover {
            color: var(--rh3o-primary);
        }

        .rh3o-menu-link.active {
            color: var(--rh3o-primary);
        }

        .rh3o-menu-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--rh3o-primary);
        }

        /* 独特 Hero 布局 - 居中卡片式 */
        .rh3o-hero {
            background: linear-gradient(135deg, #002e5b 0%, #1867c0 100%);
            padding: 96px 5vw;
            color: #ffffff;
            text-align: center;
            clip-path: ellipse(150% 100% at 50% 0%);
        }

        .rh3o-hero-content {
            max-width: 900px;
            margin: 0 auto;
        }

        .rh3o-hero-title {
            font-size: clamp(2rem, 5vw + 1rem, 4rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: calc(var(--rh3o-spacing) * 3);
            white-space: normal;
        }

        .rh3o-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.4rem);
            opacity: 0.9;
            margin-bottom: calc(var(--rh3o-spacing) * 4);
        }

        /* 教程主体内容 */
        .rh3o-main-content {
            max-width: 1100px;
            margin: -64px auto 96px;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .rh3o-guide-steps {
            flex: 1 1 600px;
            min-width: 0;
            background: #ffffff;
            border-radius: var(--rh3o-radius);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            padding: 48px;
        }

        .rh3o-step-item {
            position: relative;
            padding-left: 64px;
            margin-bottom: 48px;
        }

        .rh3o-step-item::before {
            content: attr(data-step);
            position: absolute;
            left: 0;
            top: 0;
            width: 40px;
            height: 40px;
            background: var(--rh3o-primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.2rem;
        }

        .rh3o-step-item:not(:last-child)::after {
            content: '';
            position: absolute;
            left: 20px;
            top: 45px;
            bottom: -40px;
            width: 2px;
            background: rgba(24, 103, 192, 0.1);
        }

        .rh3o-step-title {
            font-size: 1.5rem;
            color: var(--rh3o-dark);
            margin-bottom: 16px;
        }

        .rh3o-step-desc {
            font-size: 1.05rem;
            color: #666;
            margin-bottom: 24px;
        }

        .rh3o-code-box {
            background: #2d2d2d;
            color: #e0e0e0;
            padding: 16px;
            border-radius: 8px;
            font-family: monospace;
            margin: 16px 0;
            overflow-x: auto;
        }

        /* 侧边栏 - 行业矩阵 */
        .rh3o-sidebar {
            flex: 1 1 300px;
            min-width: 0;
        }

        .rh3o-matrix-card {
            background: var(--rh3o-light);
            border-left: 4px solid var(--rh3o-secondary);
            padding: 24px;
            border-radius: 8px;
            margin-bottom: 24px;
            transition: var(--rh3o-transition);
        }

        .rh3o-matrix-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        }

        .rh3o-matrix-sector {
            font-weight: bold;
            color: var(--rh3o-primary);
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
        }

        .rh3o-matrix-usecase {
            font-size: 1.1rem;
            margin-bottom: 12px;
            color: var(--rh3o-dark);
        }

        /* 动态内容区 */
        .rh3o-dynamic-section {
            background: #fdfdfd;
            padding: 80px 5vw;
            border-top: 1px solid #eee;
        }

        .rh3o-section-title {
            text-align: center;
            font-size: 2.2rem;
            margin-bottom: 48px;
        }

        .rh3o-article-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            max-width: 1200px;
            margin: 0 auto;
        }

        /* 页脚 */
        .rh3o-footer {
            background: var(--rh3o-dark);
            color: #ffffff;
            padding: 64px 5vw 32px;
            text-align: center;
        }

        .rh3o-footer-brand {
            font-size: 1.8rem;
            font-weight: bold;
            margin-bottom: 24px;
            letter-spacing: 1px;
        }

        .rh3o-footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            margin-bottom: 32px;
            list-style: none;
        }

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

        .rh3o-footer-links a:hover {
            color: white;
        }

        .rh3o-copyright {
            color: #666;
            font-size: 0.9rem;
            border-top: 1px solid #333;
            padding-top: 24px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .rh3o-nav-container {
                flex-direction: column;
                gap: 16px;
            }
            .rh3o-menu {
                justify-content: center;
                gap: 12px;
            }
            .rh3o-main-content {
                margin-top: 24px;
            }
            .rh3o-guide-steps {
                padding: 24px;
            }
        }