/* === 全局样式 === */
        :root {
            --primary: #2980B9;
            --secondary: #16A085;
            --light-bg: #F8F9F9;
            --border: #EAEDED;
            --text: #34495E;
            --text-light: #7F8C8D;
        }
        body {
            font-family: 'Arial', sans-serif;
            line-height: 1.6;
            color: var(--text);
        }
        
        /* === 标题样式 === */
        .section-title {
            font-size: 28px;
            color: var(--primary);
            border-bottom: 2px solid var(--secondary);
            padding-bottom: 10px;
            margin-top: 40px;
        }
        .subtitle {
            font-size: 18px;
            color: var(--text-light);
            margin: 10px 0 30px;
        }
        
        /* === 表格优化 === */
        .spec-table {
            width: 100%;
            border-collapse: collapse;
            margin: 25px 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }
        .spec-table th {
            background-color: var(--light-bg);
            padding: 15px;
            text-align: left;
            font-weight: 600;
            border-bottom: 2px solid var(--border);
        }
        .spec-table td {
            padding: 15px;
            border-bottom: 1px solid var(--border);
            vertical-align: middle;
        }
        .spec-table tr:last-child td {
            border-bottom: none;
        }
        
        /* === 产品特性卡片 === */
        .feature-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin: 30px 0;
        }
        .feature-card {
            flex: 1;
            min-width: 250px;
            background: white;
            border-radius: 8px;
            padding: 25px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
            transition: transform 0.3s;
        }
        .feature-card:hover {
            transform: translateY(-5px);
        }
        .feature-card h3 {
            color: var(--secondary);
            margin-top: 0;
            font-size: 20px;
        }
        
        /* === 图文模块 === */
        .image-block {
            margin: 40px 0;
            text-align: center;
        }
        .image-block img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        }
        .image-caption {
            font-size: 14px;
            color: var(--text-light);
            margin-top: 10px;
        }
        
        /* === 列表优化 === */
        .feature-list {
            padding-left: 20px;
        }
        .feature-list li {
            margin-bottom: 12px;
            position: relative;
            list-style-type: none;
            padding-left: 30px;
        }
        .feature-list li:before {
            content: "✓";
            color: var(--secondary);
            font-weight: bold;
            position: absolute;
            left: 0;
        }
        
        /* === 移动端适配 === */
        @media (max-width: 768px) {
            .section-title { font-size: 24px; }
            .feature-card { min-width: 100%; }
            .spec-table { font-size: 14px; }
        }