:root {
            --h187-primary: #005bb7;
            --h187-secondary: #f39c12;
            --h187-accent: #27ae60;
            --h187-bg: #ffffff;
            --h187-text: #2c3e50;
            --h187-light-gray: #f8f9fa;
            --h187-border: #e1e4e8;
            --h187-spacing: 8px;
            --h187-container-width: 1100px;
        }

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

        body {
            font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.7;
            color: var(--h187-text);
            background-color: var(--h187-bg);
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* 导航系统 */
        .h187-nav-wrapper {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--h187-border);
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }

        .h187-nav-container {
            max-width: var(--h187-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: calc(var(--h187-spacing) * 2);
        }

        .h187-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

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

        .h187-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: calc(var(--h187-spacing) * 2);
        }

        .h187-menu li {
            min-width: 0;
        }

        .h187-menu a {
            text-decoration: none;
            color: var(--h187-text);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s;
            padding: 4px 8px;
            border-radius: 4px;
        }

        .h187-menu a:hover {
            color: var(--h187-primary);
            background: rgba(0,91,183,0.05);
        }

        .h187-menu a.active {
            color: var(--h187-primary);
            border-bottom: 2px solid var(--h187-primary);
            border-radius: 0;
        }

        /* Hero 区块 - 独特居中卡片式布局 */
        .h187-hero {
            padding: calc(var(--h187-spacing) * 12) calc(var(--h187-spacing) * 4);
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .h187-hero-content {
            max-width: 800px;
            margin: 0 auto;
            z-index: 2;
            position: relative;
        }

        .h187-hero h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.2;
            margin-bottom: calc(var(--h187-spacing) * 3);
            color: #1a2a6c;
            word-break: break-word;
        }

        .h187-hero p {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: #4a5568;
            margin-bottom: calc(var(--h187-spacing) * 4);
            word-break: break-word;
        }

        /* 安装步骤 - 时间轴设计 */
        .h187-steps-section {
            max-width: 900px;
            margin: calc(var(--h187-spacing) * 8) auto;
            padding: 0 calc(var(--h187-spacing) * 3);
        }

        .h187-step-item {
            display: flex;
            flex-wrap: wrap;
            margin-bottom: calc(var(--h187-spacing) * 8);
            position: relative;
        }

        .h187-step-number {
            flex: 0 0 60px;
            height: 60px;
            background: var(--h187-primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: bold;
            margin-right: calc(var(--h187-spacing) * 3);
            box-shadow: 0 4px 15px rgba(0,91,183,0.3);
            min-width: 0;
        }

        .h187-step-body {
            flex: 1;
            min-width: 300px;
            background: var(--h187-light-gray);
            padding: calc(var(--h187-spacing) * 4);
            border-radius: 16px;
            border-left: 5px solid var(--h187-primary);
            transition: transform 0.3s ease;
        }

        .h187-step-body:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }

        .h187-step-body h3 {
            margin-bottom: calc(var(--h187-spacing) * 2);
            font-size: 1.5rem;
            color: var(--h187-primary);
        }

        .h187-step-tips {
            margin-top: calc(var(--h187-spacing) * 2);
            padding: calc(var(--h187-spacing) * 2);
            background: #fff;
            border-radius: 8px;
            font-size: 0.9rem;
            border: 1px dashed var(--h187-border);
        }

        /* 核心能力展示 - Grid 布局 */
        .h187-features-grid {
            background-color: #1a202c;
            color: white;
            padding: calc(var(--h187-spacing) * 10) calc(var(--h187-spacing) * 4);
        }

        .h187-features-container {
            max-width: var(--h187-container-width);
            margin: 0 auto;
        }

        .h187-section-title {
            text-align: center;
            margin-bottom: calc(var(--h187-spacing) * 6);
            font-size: 2.5rem;
        }

        .h187-grid-wrapper {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: calc(var(--h187-spacing) * 4);
        }

        .h187-feature-card {
            background: rgba(255, 255, 255, 0.05);
            padding: calc(var(--h187-spacing) * 4);
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.3s;
        }

        .h187-feature-card:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--h187-secondary);
        }

        .h187-feature-card h4 {
            color: var(--h187-secondary);
            font-size: 1.25rem;
            margin-bottom: calc(var(--h187-spacing) * 2);
        }

        .h187-feature-list {
            list-style: none;
            font-size: 0.95rem;
            opacity: 0.9;
        }

        .h187-feature-list li {
            margin-bottom: 8px;
            padding-left: 20px;
            position: relative;
        }

        .h187-feature-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--h187-accent);
        }

        /* 资讯区块标记 */
        .h187-dynamic-section {
            max-width: var(--h187-container-width);
            margin: calc(var(--h187-spacing) * 10) auto;
            padding: 0 calc(var(--h187-spacing) * 4);
        }

        /* 页脚 */
        .h187-footer {
            background: #2d3436;
            color: #dfe6e9;
            padding: calc(var(--h187-spacing) * 8) calc(var(--h187-spacing) * 4);
            margin-top: calc(var(--h187-spacing) * 10);
        }

        .h187-footer-content {
            max-width: var(--h187-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: calc(var(--h187-spacing) * 4);
        }

        .h187-footer-info {
            flex: 1;
            min-width: 280px;
        }

        .h187-footer-brand {
            font-size: 1.8rem;
            font-weight: bold;
            color: white;
            margin-bottom: calc(var(--h187-spacing) * 2);
        }

        .h187-footer-links {
            flex: 1;
            min-width: 200px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .h187-footer-links a {
            color: #b2bec3;
            text-decoration: none;
            transition: color 0.3s;
        }

        .h187-footer-links a:hover {
            color: white;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .h187-menu {
                display: none; /* 简化移动端，实际开发中应使用汉堡菜单 */
            }
            .h187-step-item {
                flex-direction: column;
            }
            .h187-step-number {
                margin-bottom: calc(var(--h187-spacing) * 2);
            }
            .h187-step-body {
                min-width: 100%;
            }
        }