.Ih-box{display: flex;width: 86%;height: 100%;float: left;}
.Ih-box li{display: inline-block;height: 100%;padding: 0 20px;box-sizing: border-box;cursor: pointer;}
.Ih-box li.active h3{color: #8c1b15;}

.hot_column{width: 100%;display: flex;justify-content: flex-start;flex-wrap: wrap;margin-top: 32px;}
.hot_column .pic{width: 14vw;height: 7vw;margin-bottom: 10px;overflow: hidden;margin-right: 10px;}
.hot_column .pic img{width: 100%;height: auto;min-height: 100%;}




@media only screen and (max-width: 767px) {
    .Ih-box{display: flex;width: 100%;height: 100%;flex-wrap: wrap;}
    .Ih-box li{padding: 0 8px;}
    .hot_column{width: 100%;display: flex;justify-content: space-between;flex-wrap: wrap;margin-top: 14px;}
    .hot_column .pic{width: 46vw;height: 20vw;margin-bottom: 10px;overflow: hidden;margin-right: 0;}
    .hot_column .pic img{width: 100%;height: auto;min-height: 100%;}
}