/* 唯一前缀类名避免冲突 */
        .ecm-container {
            max-width: 90%px;
            margin: 0 auto;
            background: white;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
            overflow: hidden;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.6;
        }
        
        .ecm-header {
            background: linear-gradient(135deg, #6597cf, #6597cf);
            color: white;
            padding: 4px 40px;
            text-align: center;
            border-bottom: 4px solid #cfdee9;
        }
        
        .ecm-header h1 {
            font-size: 2.5rem;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
            text-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }
        
        .ecm-header p {
            font-size: 1.15rem;
            opacity: 0.92;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .ecm-content {
            padding: 35px 40px;
        }
        
        .ecm-section {
            margin-bottom: 45px;
            padding-bottom: 35px;
            border-bottom: 1px solid #e0e6ed;
        }
        
        .ecm-section:last-child {
            border-bottom: none;
        }
        
        .ecm-section-title {
            color: #1a5ca3;
            font-size: 1.9rem;
            margin-bottom: 28px;
            padding-bottom: 12px;
            border-bottom: 2px solid #3498db;
            position: relative;
        }
        
        .ecm-section-title::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 85px;
            height: 3px;
            background: #e74c3c;
        }
        
        .ecm-subsection {
            margin-bottom: 35px;
        }
        
        .ecm-subtitle {
            font-size: 1.45rem;
            color: #2c6fbb;
            margin-bottom: 22px;
            padding-left: 16px;
            border-left: 4px solid #3498db;
        }
        
        .ecm-table-wrapper {
            overflow-x: auto;
            margin: 28px 0;
            border-radius: 10px;
            box-shadow: 0 3px 12px rgba(0,0,0,0.06);
            border: 1px solid #e0e6ed;
        }
        
        .ecm-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }
        
        .ecm-table th {
            background: linear-gradient(to bottom, #e3f2fd, #c5e3fc);
            color: #1d3c6e;
            font-weight: 600;
            text-align: left;
            padding: 16px 18px;
            border: 1px solid #d4e2f1;
        }
        
        .ecm-table td {
            padding: 14px 18px;
            border: 1px solid #e0e6ed;
            vertical-align: top;
        }
        
        .ecm-table tbody tr:nth-child(even) {
            background-color: #f8fbff;
        }
        
        .ecm-table tbody tr:hover {
            background-color: #edf5ff;
        }
        
        .ecm-highlight {
            background-color: #fff8e1;
            padding: 4px 8px;
            border-radius: 5px;
            font-weight: 600;
            display: inline-block;
        }
        
        .ecm-badge {
            display: inline-block;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            margin: 3px;
        }
        
        .ecm-badge-i { background: #e8f5e9; color: #2e7d32; border: 1px solid #c8e6c9; }
        .ecm-badge-ii { background: #e3f2fd; color: #1565c0; border: 1px solid #bbdefb; }
        .ecm-badge-iii { background: #ffecb3; color: #f57f17; border: 1px solid #ffd54f; }
        .ecm-badge-plastic { background: #f3e5f5; color: #6a1b9a; border: 1px solid #e1bee7; }
        
        .ecm-list {
            padding-left: 30px;
            margin: 22px 0;
        }
        
        .ecm-list li {
            margin-bottom: 14px;
            position: relative;
        }
        
        .ecm-list li::before {
            content: "•";
            color: #3498db;
            font-weight: bold;
            position: absolute;
            left: -20px;
            font-size: 1.4rem;
        }
        
        .ecm-note {
            background-color: #e3f2fd;
            border-left: 4px solid #3498db;
            padding: 22px;
            margin: 30px 0;
            border-radius: 0 10px 10px 0;
        }
        
        .ecm-note-title {
            font-weight: 700;
            margin-bottom: 14px;
            color: #1a5ca3;
            font-size: 1.2rem;
        }
        
        .ecm-rules {
            background: linear-gradient(to right, #f8f9fa, #e9ecef);
            padding: 28px;
            border-radius: 10px;
            margin: 35px 0;
            border: 1px solid #e0e6ed;
        }
        
        .ecm-rule-item {
            margin-bottom: 24px;
            padding: 18px;
            background: white;
            border-radius: 10px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.04);
            border-left: 4px solid #3498db;
        }
        
        .ecm-rule-title {
            font-weight: 700;
            color: #1a5ca3;
            margin-bottom: 12px;
            font-size: 1.25rem;
        }
        
        .ecm-footer {
            text-align: center;
            padding: 25px;
            background: #f1f5f9;
            color: #5a6c87;
            font-size: 0.95rem;
            border-top: 1px solid #e0e6ed;
        }
        
        .ecm-star-rating {
            color: #ffb300;
            letter-spacing: 2px;
            font-weight: bold;
        }
        
        .ecm-param-table th, .ecm-param-table td {
            text-align: center;
        }
        
        .ecm-param-section {
            text-align: left;
            background-color: #e3f2fd !important;
            font-weight: 700;
            font-size: 1.05rem;
        }
        
        .ecm-important {
            background-color: rgba(231, 76, 60, 0.1);
            font-weight: 700;
        }
        
        @media (max-width: 768px) {
            .ecm-header {
                padding: 20px;
            }
            
            .ecm-content {
                padding: 20px;
            }
            
            .ecm-header h1 {
                font-size: 1.9rem;
            }
            
            .ecm-section-title {
                font-size: 1.6rem;
            }
            
            .ecm-subtitle {
                font-size: 1.3rem;
            }
        }