/* 基础重置和性能优化 */
.ad-container * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 移动端隐藏 */
@media (max-width: 768px) {
    .pc-ad-container {
        display: none;
    }
}

/* PC端样式 - 优化版 */
@media (min-width: 769px) {
    .ad-container {
        display: flex;
        justify-content: center;
        gap: 20px;
        width: 100%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 15px 0;
    }

    .ad-column {
        flex: 0 1 48%;
        display: flex;
        flex-direction: column;
        gap: 15px;
    }

    .ad-item {
        width: 100%;
        overflow: hidden;
        border-radius: 8px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        transition: all 0.3s ease;
        background: #fff;
    }

    .ad-item:hover {
        transform: translateY(-3px);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
    }

    .ad-item a {
        display: block;
        width: 100%;
        height: 100%;
    }

    .ad-item img {
        width: 100%;
        height: auto;
        max-height: 100px;
        min-height: 60px;
        object-fit: cover;
        transition: transform 0.3s ease;
        border-radius: 6px;
    }

    .ad-item:hover img {
        transform: scale(1.02);
    }
}

/* 大屏幕额外优化 */
@media (min-width: 1400px) {
    .ad-container {
        max-width: 1400px;
    }
    
    .ad-item img {
        max-height: 120px;
    }
}