:root {
            --hbosco-primary: #004a99;
            --hbosco-secondary: #c0392b;
            --hbosco-dark: #2c3e50;
            --hbosco-light: #f8f9fa;
            --hbosco-accent: #3498db;
            --hbosco-text: #333333;
            --hbosco-gray: #ecf0f1;
            --hbosco-white: #ffffff;
            --hbosco-spacing: 8px;
            --hbosco-container-width: 1100px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--hbosco-light);
            color: var(--hbosco-text);
            line-height: 1.6;
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* 导航系统 */
        .hbosco-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
        }

        .hbosco-nav-container {
            max-width: var(--hbosco-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 24px;
        }

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

        .hbosco-logo img {
            height: 42px;
            display: block;
        }

        .hbosco-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
            min-width: 0;
        }

        .hbosco-nav-menu li a {
            text-decoration: none;
            color: var(--hbosco-dark);
            font-size: 15px;
            font-weight: 500;
            transition: color 0.3s ease;
            position: relative;
        }

        .hbosco-nav-menu li a:hover,
        .hbosco-nav-menu li a.hbosco-active {
            color: var(--hbosco-primary);
        }

        .hbosco-nav-menu li a.hbosco-active::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--hbosco-primary);
        }

        /* Hero 区域：非对称卡片式设计 */
        .hbosco-tutorial-hero {
            padding: 64px 24px;
            max-width: var(--hbosco-container-width);
            margin: 48px auto;
            background: linear-gradient(135deg, var(--hbosco-primary), #003366);
            border-radius: 32px;
            color: var(--hbosco-white);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            overflow: hidden;
            box-shadow: 0 30px 60px rgba(0,74,153,0.2);
        }

        .hbosco-hero-content {
            flex: 1;
            min-width: 320px;
            padding: 32px;
            word-break: break-word;
        }

        .hbosco-hero-title {
            font-size: clamp(2rem, 4vw + 0.5rem, 3.5rem);
            line-height: 1.2;
            margin-bottom: 24px;
            font-weight: 800;
        }

        .hbosco-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.3rem);
            opacity: 0.9;
            margin-bottom: 32px;
            max-width: 600px;
        }

        .hbosco-hero-visual {
            flex: 1;
            min-width: 320px;
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        /* CSS 模拟对比界面 */
        .hbosco-interface-mockup {
            width: 90%;
            height: 300px;
            background: var(--hbosco-white);
            border-radius: 12px;
            position: relative;
            box-shadow: 0 20px 40px rgba(0,0,0,0.3);
            overflow: hidden;
            display: flex;
        }

        .hbosco-mock-side {
            flex: 1;
            padding: 16px;
            border-right: 1px solid #ddd;
        }

        .hbosco-mock-line {
            height: 8px;
            background: #eee;
            margin-bottom: 8px;
            border-radius: 4px;
        }

        .hbosco-mock-diff {
            background: #ffecec;
            border-left: 3px solid var(--hbosco-secondary);
        }

        /* 核心算法区块 */
        .hbosco-section-algorithms {
            padding: 96px 24px;
            max-width: var(--hbosco-container-width);
            margin: 0 auto;
        }

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

        .hbosco-section-header h2 {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            color: var(--hbosco-dark);
            margin-bottom: 16px;
        }

        .hbosco-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .hbosco-card {
            background: var(--hbosco-white);
            padding: 40px;
            border-radius: 20px;
            border: 1px solid rgba(0,0,0,0.05);
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            display: flex;
            flex-direction: column;
            min-width: 0;
            box-shadow: 0 10px 30px rgba(0,0,0,0.02);
        }

        .hbosco-card:hover {
            transform: translateY(-12px);
            box-shadow: 0 25px 50px rgba(0,0,0,0.08);
            border-color: var(--hbosco-primary);
        }

        .hbosco-card h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--hbosco-primary);
        }

        .hbosco-card p {
            color: #666;
            margin-bottom: 24px;
            line-height: 1.8;
        }

        .hbosco-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: auto;
        }

        .hbosco-tag {
            background: var(--hbosco-gray);
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 13px;
            color: var(--hbosco-dark);
        }

        /* 协议与同步区块 */
        .hbosco-protocol-section {
            background: var(--hbosco-dark);
            color: var(--hbosco-white);
            padding: 80px 24px;
            margin: 64px 0;
        }

        .hbosco-protocol-container {
            max-width: var(--hbosco-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .hbosco-protocol-item {
            flex: 1;
            min-width: 300px;
            background: rgba(255,255,255,0.05);
            padding: 32px;
            border-radius: 16px;
            border-left: 4px solid var(--hbosco-accent);
        }

        .hbosco-protocol-item h4 {
            font-size: 1.25rem;
            margin-bottom: 20px;
            color: var(--hbosco-accent);
        }

        .hbosco-endpoint-list {
            list-style: none;
        }

        .hbosco-endpoint-list li {
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }

        .hbosco-endpoint-list li::before {
            content: '•';
            color: var(--hbosco-accent);
            margin-right: 12px;
            font-size: 1.5rem;
        }

        /* 行业应用场景 */
        .hbosco-use-cases {
            max-width: var(--hbosco-container-width);
            margin: 96px auto;
            padding: 0 24px;
        }

        .hbosco-case-row {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-bottom: 64px;
            align-items: center;
        }

        .hbosco-case-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .hbosco-case-content {
            flex: 1;
            min-width: 300px;
        }

        .hbosco-case-industry {
            display: inline-block;
            color: var(--hbosco-secondary);
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
            font-size: 14px;
        }

        .hbosco-case-problem {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--hbosco-dark);
        }

        .hbosco-case-solution {
            padding: 24px;
            background: var(--hbosco-white);
            border-radius: 12px;
            border: 1px dashed #ccc;
            position: relative;
        }

        /* 资讯区块 */
        .hbosco-news-section {
            max-width: var(--hbosco-container-width);
            margin: 80px auto;
            padding: 0 24px;
        }

        /* 页脚 */
        .hbosco-footer {
            background: #1a1a1a;
            color: #888;
            padding: 64px 24px;
            margin-top: 96px;
        }

        .hbosco-footer-inner {
            max-width: var(--hbosco-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
        }

        .hbosco-footer-brand h2 {
            color: var(--hbosco-white);
            margin-bottom: 16px;
        }

        .hbosco-footer-links {
            display: flex;
            gap: 48px;
            flex-wrap: wrap;
        }

        .hbosco-footer-col h5 {
            color: var(--hbosco-white);
            margin-bottom: 20px;
        }

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

        .hbosco-footer-col ul li {
            margin-bottom: 10px;
        }

        .hbosco-footer-col ul li a {
            color: #888;
            text-decoration: none;
            transition: color 0.3s;
        }

        .hbosco-footer-col ul li a:hover {
            color: var(--hbosco-white);
        }

        .hbosco-copyright {
            text-align: center;
            padding-top: 48px;
            margin-top: 48px;
            border-top: 1px solid #333;
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .hbosco-nav-container {
                flex-direction: column;
                gap: 20px;
            }
            .hbosco-nav-menu {
                justify-content: center;
                gap: 12px;
            }
            .hbosco-tutorial-hero {
                border-radius: 0;
                margin: 0;
            }
            .hbosco-hero-content {
                padding: 16px;
            }
            .hbosco-interface-mockup {
                height: 200px;
            }
            .hbosco-case-row:nth-child(even) {
                flex-direction: row;
            }
        }