*{
    margin:0;
    padding:0;}
.sm{
height: 250px;overflow: hidden;width:336px;
margin-top:15px;}
.smbanner {
    width: 336px;
    position: relative;
    height: 250px;
    /* overflow: hidden; */
    float:left
;}
.smbanner .imgbox{
    height: 250px;
    width: 336px;}

.smbanner .imgbox img {
    width: 100%;
    height: 100%;
    overflow: hidden;
    margin:0;padding:0;}

.smbanner_bottom{
    position: absolute;
    width: 100%;
    background-color: rgba(0,0,0,0.5);
    bottom: 0;
    color: #fff;
    height: 40px;
    line-height: 40px;
    padding:0 10px;}
.smbanner_bottom p{
    width:70%;
    overflow: hidden;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: none;}
.smbanner_bottom p a{
    color:#fff
;}

.smbanner_bottom ul {
    position: absolute;
    bottom: 11px;
    right: 0;
    height: 20px;}

.smbanner_bottom li {
    width: 15px;
    height: 15px;
    /* border-radius: 50%; */
    float: left;
    background-color: #ccc;
    margin-right: 10px;
    margin-top:3px;}
.prev, .next{
    width:50px;
    height:50px;
    color:#fff;
    background:rgba(0,0,0,0.3);
    position:absolute;
    display:flex;
    align-items:center;
    justify-content:center;
    cursor:pointer;}
.prev{
top:50%;
left:0px;
margin-top:-60px;}
.next{
top:50%;
right:0px;
margin-top:-60px;}