.my-mask{position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,.2)}.my-mask .mask-main{background-color:#fff;position:absolute;top:50%;left:0;right:0;margin:0 auto;transform:translateY(-50%);width:960px}.my-mask .mask-main .mask-head{width:960px;height:64px;background:#FFF;box-shadow:inset 0 -1px 0 0 #E6E6E6;position:relative}.my-mask .mask-main .mask-head .mask-title{font-size:24px;color:#333;text-align:center;line-height:64px;margin:0}.my-mask .mask-main .mask-head .mask-close{position:absolute;top:12px;right:24px;width:40px;height:40px;display:block;cursor:pointer}