:root {
            --lnok-primary: #8B0000; /* 经典官方深红 */
            --lnok-secondary: #2F4F4F;
            --lnok-accent: #E63946;
            --lnok-bg: #F8F9FA;
            --lnok-text: #1A1A1A;
            --lnok-text-light: #666666;
            --lnok-white: #FFFFFF;
            --lnok-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --lnok-radius: 16px;
            --lnok-container-width: 1300px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--lnok-bg);
            color: var(--lnok-text);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航栏设计 */
        .lnok-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .lnok-nav-container {
            max-width: var(--lnok-container-width);
            margin: 0 auto;
            padding: 0 32px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
            flex-wrap: wrap;
        }

        .lnok-logo {
            flex: 0 0 auto;
            display: flex;
            align-items: center;
        }

        .lnok-logo img {
            height: 42px;
            width: auto;
            display: block;
        }

        .lnok-menu {
            display: flex;
            list-style: none;
            gap: 12px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .lnok-menu a {
            text-decoration: none;
            color: var(--lnok-text);
            font-weight: 500;
            font-size: 15px;
            padding: 8px 16px;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .lnok-menu a:hover {
            color: var(--lnok-primary);
            background: rgba(139, 0, 0, 0.05);
        }

        .lnok-menu a.active {
            color: var(--lnok-white);
            background: var(--lnok-primary);
        }

        /* Hero 独特布局：非对称分割 */
        .lnok-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: linear-gradient(135deg, #FFF 0%, #F0F2F5 100%);
            position: relative;
            overflow: hidden;
        }

        .lnok-hero-inner {
            max-width: var(--lnok-container-width);
            margin: 0 auto;
            padding: 0 32px;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 48px;
        }

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

        .lnok-hero-tag {
            display: inline-block;
            background: rgba(139, 0, 0, 0.1);
            color: var(--lnok-primary);
            padding: 6px 16px;
            border-radius: 30px;
            font-weight: 600;
            margin-bottom: 24px;
            font-size: 14px;
        }

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

        .lnok-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--lnok-text-light);
            max-width: 600px;
            margin-bottom: 40px;
        }

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

        /* 教程核心卡片组 */
        .lnok-tutorial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
            max-width: var(--lnok-container-width);
            margin: -48px auto 96px;
            padding: 0 32px;
            position: relative;
            z-index: 10;
        }

        .lnok-step-card {
            background: var(--lnok-white);
            padding: 40px;
            border-radius: var(--lnok-radius);
            box-shadow: var(--lnok-shadow);
            transition: transform 0.3s ease;
            border-top: 4px solid var(--lnok-primary);
        }

        .lnok-step-card:hover {
            transform: translateY(-10px);
        }

        .lnok-step-num {
            font-size: 48px;
            font-weight: 900;
            color: rgba(139, 0, 0, 0.1);
            margin-bottom: 16px;
        }

        /* 逻辑引擎技术细节展示 */
        .lnok-engine-section {
            padding: 96px 0;
            background: #1A1A1A;
            color: var(--lnok-white);
        }

        .lnok-section-header {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 64px;
            padding: 0 32px;
        }

        .lnok-engine-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 32px;
            max-width: var(--lnok-container-width);
            margin: 0 auto;
            padding: 0 32px;
        }

        .lnok-engine-item {
            background: rgba(255, 255, 255, 0.05);
            padding: 32px;
            border-radius: var(--lnok-radius);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .lnok-engine-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--lnok-accent);
            margin-bottom: 16px;
        }

        .lnok-engine-desc {
            font-size: 15px;
            color: #AAA;
            margin-bottom: 24px;
        }

        .lnok-use-case {
            background: rgba(139, 0, 0, 0.2);
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 14px;
            color: #FFDADA;
        }

        /* ROI 分析区块 */
        .lnok-roi-section {
            padding: 96px 0;
            max-width: var(--lnok-container-width);
            margin: 0 auto;
            padding: 96px 32px;
        }

        .lnok-roi-flex {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: center;
        }

        .lnok-roi-content {
            flex: 1;
            min-width: 320px;
        }

        .lnok-roi-stats {
            flex: 1;
            min-width: 320px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .lnok-stat-box {
            background: var(--lnok-white);
            padding: 24px 32px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            gap: 24px;
            box-shadow: 5px 5px 15px rgba(0,0,0,0.03);
        }

        .lnok-stat-val {
            font-size: 24px;
            font-weight: 800;
            color: var(--lnok-primary);
            flex-shrink: 0;
        }

        /* 资讯动态 */
        .lnok-dynamic-section {
            padding: 96px 0;
            background: #FFF;
        }

        .lnok-article-list {
            max-width: var(--lnok-container-width);
            margin: 0 auto;
            padding: 0 32px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
        }

        /* 页脚 */
        .lnok-footer {
            background: var(--lnok-secondary);
            color: #DDD;
            padding: 80px 0 40px;
        }

        .lnok-footer-inner {
            max-width: var(--lnok-container-width);
            margin: 0 auto;
            padding: 0 32px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding-bottom: 64px;
        }

        .lnok-footer-brand h2 {
            color: var(--lnok-white);
            font-size: 24px;
            margin-bottom: 16px;
        }

        .lnok-footer-links h3 {
            color: var(--lnok-white);
            font-size: 18px;
            margin-bottom: 24px;
        }

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

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

        .lnok-footer-links a {
            color: #AAA;
            text-decoration: none;
            transition: color 0.3s;
        }

        .lnok-footer-links a:hover {
            color: var(--lnok-white);
        }

        .lnok-copyright {
            text-align: center;
            padding-top: 40px;
            font-size: 14px;
            color: #888;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .lnok-nav-container {
                height: auto;
                padding: 16px;
            }
            .lnok-menu {
                justify-content: center;
                margin-top: 16px;
            }
            .lnok-hero {
                padding-top: 120px;
            }
            .lnok-hero-inner {
                text-align: center;
            }
            .lnok-hero-subtitle {
                margin: 0 auto 40px;
            }
        }