.section {
            margin-bottom: 32px;
        }
        .section-title {
            font-size: 32px;
            font-weight: bold;
            margin-bottom: 16px;
            border-left: 4px solid #4f7cff;
            padding-left: 10px;
            color: #1f2a44;
        }

        .card-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .card {
            border-radius: 8px;
            padding: 30px 12px;
            text-align: center;
            font-weight: 600;
            font-size: 28px;
            color: #ffffff;
        }

        /* 整块背景颜色控制 */
        .爆满 {
            background: #d9534f; /* 红 */
        }
        .拥挤 {
            background: #f0ad4e; /* 橙 */
            color: #3b2e00;
        }
        .正常, .顺畅 {
            background: #4cae4c; /* 绿 */
        }
        .维护 {
            background: #bfbfbf; /* 灰 */
            color: #333333;
        }

        .empty {
            color: #7a7f99;
            font-size: 16px;
            padding: 6px 0;
        }

        @media (max-width: 1000px) {
            .card-container { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 600px) {
            .card-container { grid-template-columns: repeat(1, 1fr); }
        }