:root {
            --h187-primary: #f39c12;
            --h187-secondary: #2c3e50;
            --h187-accent: #3498db;
            --h187-bg-light: #f9f9f9;
            --h187-text-dark: #2d3436;
            --h187-text-muted: #636e72;
            --h187-white: #ffffff;
            --h187-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --h187-transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

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

        body {
            font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", sans-serif;
            line-height: 1.7;
            color: var(--h187-text-dark);
            background-color: var(--h187-white);
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 布局容器 */
        .h187-container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 导航栏 */
        .h187-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(--h187-shadow);
        }

        .h187-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            min-width: 0;
        }

        .h187-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
        }

        .h187-logo img {
            height: 40px;
            width: auto;
        }

        .h187-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
            min-width: 0;
        }

        .h187-nav-item a {
            text-decoration: none;
            color: var(--h187-secondary);
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 6px;
            transition: var(--h187-transition);
            font-size: clamp(0.9rem, 1vw + 0.2rem, 1rem);
            display: block;
        }

        .h187-nav-item a:hover {
            background: rgba(243, 156, 18, 0.1);
            color: var(--h187-primary);
        }

        .h187-nav-item a.active {
            background: var(--h187-primary);
            color: var(--h187-white);
        }

        /* Hero 区域 - 独特的三方分屏设计 */
        .h187-hero {
            padding: 80px 0;
            background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
            position: relative;
            overflow: hidden;
        }

        .h187-hero-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            align-items: center;
            min-width: 0;
        }

        .h187-hero-content {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        .h187-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            color: var(--h187-secondary);
            margin-bottom: 24px;
            font-weight: 800;
        }

        .h187-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--h187-text-muted);
            margin-bottom: 32px;
            max-width: 600px;
        }

        .h187-hero-visual {
            flex: 1;
            min-width: 320px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }

        .h187-merge-card {
            background: var(--h187-white);
            padding: 24px;
            border-radius: 16px;
            box-shadow: var(--h187-shadow);
            border-top: 4px solid var(--h187-primary);
            flex: 1;
            min-width: 200px;
            transition: var(--h187-transition);
        }

        .h187-merge-card:hover {
            transform: translateY(-8px);
        }

        .h187-merge-card h3 {
            margin-bottom: 12px;
            color: var(--h187-secondary);
        }

        /* 核心教程区块 */
        .h187-section {
            padding: 96px 0;
        }

        .h187-section-light {
            background-color: var(--h187-bg-light);
        }

        .h187-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .h187-section-title {
            font-size: clamp(1.75rem, 3vw + 0.5rem, 2.5rem);
            color: var(--h187-secondary);
            margin-bottom: 16px;
        }

        .h187-feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .h187-feature-card {
            background: var(--h187-white);
            padding: 40px;
            border-radius: 20px;
            border: 1px solid rgba(0,0,0,0.05);
            transition: var(--h187-transition);
            word-break: break-word;
        }

        .h187-feature-card:hover {
            box-shadow: var(--h187-shadow);
            border-color: var(--h187-primary);
        }

        .h187-feature-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(243, 156, 18, 0.1);
            color: var(--h187-primary);
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .h187-feature-card ul {
            list-style: none;
            margin-top: 20px;
        }

        .h187-feature-card li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 12px;
            color: var(--h187-text-muted);
        }

        .h187-feature-card li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--h187-primary);
            font-weight: bold;
        }

        /* 场景应用区块 */
        .h187-scenario-section {
            display: flex;
            flex-wrap: wrap;
            gap: 0;
            overflow: hidden;
            border-radius: 32px;
            margin-top: 48px;
            box-shadow: var(--h187-shadow);
        }

        .h187-scenario-item {
            flex: 1;
            min-width: 300px;
            padding: 48px;
            background: var(--h187-secondary);
            color: var(--h187-white);
            transition: var(--h187-transition);
        }

        .h187-scenario-item:nth-child(even) {
            background: var(--h187-accent);
        }

        .h187-scenario-item:hover {
            flex: 1.2;
        }

        .h187-scenario-item h4 {
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        /* 页脚 */
        .h187-footer {
            background: var(--h187-secondary);
            color: var(--h187-white);
            padding: 80px 0 40px;
        }

        .h187-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .h187-footer-brand h2 {
            font-size: 1.8rem;
            margin-bottom: 16px;
            color: var(--h187-primary);
        }

        .h187-footer-links h3 {
            margin-bottom: 24px;
            font-size: 1.1rem;
        }

        .h187-footer-links ul {
            list-style: none;
        }

        .h187-footer-links li {
            margin-bottom: 12px;
        }

        .h187-footer-links a {
            color: #bdc3c7;
            text-decoration: none;
            transition: var(--h187-transition);
        }

        .h187-footer-links a:hover {
            color: var(--h187-primary);
            padding-left: 8px;
        }

        .h187-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #7f8c8d;
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .h187-nav-wrapper {
                flex-direction: column;
                gap: 16px;
            }
            .h187-nav-menu {
                justify-content: center;
            }
            .h187-hero {
                padding: 48px 0;
            }
            .h187-merge-card {
                min-width: 100%;
            }
        }

        /* 交互增强 */
        .h187-btn {
            display: inline-block;
            padding: 14px 32px;
            background: var(--h187-primary);
            color: var(--h187-white);
            text-decoration: none;
            border-radius: 8px;
            font-weight: 600;
            transition: var(--h187-transition);
            border: none;
            cursor: pointer;
        }

        .h187-btn:hover {
            background: #e67e22;
            box-shadow: 0 4px 15px rgba(243, 156, 18, 0.4);
            transform: translateY(-2px);
        }