/* Stats Section 桌面默认4栏 */
.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    background: linear-gradient(90deg, #003399 0%, #0055cc 100%);
    padding: 10px 5px;
    gap: 20px;
}

.stat-item {
    text-align: center;
    color: white;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 2px;
}

.stat-label {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

/* 平板 768px以下：2栏布局 */
@media screen and (max-width: 768px) {
    .stats {
        grid-template-columns: repeat(2, 1fr);
        padding: 30px 15px;
        row-gap: 30px;
    }
    .stat-number {
        font-size: 30px;
    }
    .stat-label {
        font-size: 13px;
    }
}

/* 手机 480px以下：单栏上下堆叠 */
@media screen and (max-width: 480px) {
    .stats {
        grid-template-columns: 1fr;
        padding: 25px 12px;
        row-gap: 24px;
    }
    .stat-number {
        font-size: 26px;
    }
    .stat-label {
        font-size: 12px;
    }
}