.base-main .tab-top ul{justify-content: center;}
.base-main .tab-top ul li{margin: 0 30px;}
.base-main .main-content .flex{display: flex;align-items: center;justify-content: space-between;}
.base-main .main-content .flex:not(:first-child){margin-top: 50px;}
.base-main .main-content .flex.left .item-left{text-align: right;}
.base-main .main-content .flex.left .letter{text-align: left;left: -90px;right: 0;}

@media only screen and (max-width:1200px ) {
	.base-main .main-content .flex{flex-direction: column;}
	.base-main .main-content .flex.left{flex-flow: column-reverse;}
}