.contain { width: 1400px; height:590px; margin: auto auto;  overflow: hidden;}
.single {  width: 100%;  height: 100%;  position: relative;  font-size: 0;}
.pre { position: absolute;  width: 56px;  height: 110px; top:30%;  cursor: pointer;}

.pre::before { content: "";  width: 56px; height: 110px;   border-width: 2px 0 0 2px;  position: absolute;  left: 70%;  top: 50%;}
.next { position: absolute;  width: 56px;  height: 110px; top:30%; right:0; cursor: pointer;}

.next::before { content: ""; width: 12px; height: 12px;    border-width: 0 2px 2px 0;   position: absolute; left: 30%;  top: 50%;}
.single ul { list-style: none;  white-space: nowrap;  display: inline-block;}
.single ul li { display: inline-block;}
img { vertical-align: top;}