.focus
{
    width: 575px; /*整体的宽度*/
    height: 323px; /*整体的高度*/
    margin: 0 auto;
    overflow: hidden;
    position: relative;}
.focus ul
{
    height: 275px; /*内置的ul的高度*/
    position: absolute;}
.focus ul, li
{
    list-style: none;
    margin: 0px;
    padding: 0px;}
.focus ul li
{
    float: left;
    width: 575px; /*内置的il的宽度和整体一样，可以遮盖住*/
    height: 323px; /*内置的il的高度和整体一样，可以遮盖住*/
    overflow: hidden;
    position: relative;
    background: #000;}
.focus ul li div
{
    position: absolute;
    overflow: hidden;}
.focus ul li img
{
    border: 0;}
.focus .btnBg
{
    position: absolute;
    width: 575px; /*底部的按钮的长度*/
    height: 20px; /*底部按钮的高度*/
    left: 0;
    bottom: 0;
    background: #000;
    display: none;}
.focus .btn
{
    position: absolute;
    width: 575px;
    height: 23px;
    padding: 0px 10px 0px 10px;
    right: 0;
    bottom: 6px;
    text-align: right;}
.focus .btn span
{
    display: inline-block;
    _display: inline;
    _zoom: 1;
    width: 25px;
    height: 24px;
    line-height: 24px;
    text-align: center;
    _font-size: 0;
    margin-left: 5px;
    cursor: pointer;
    background: #cacaca;}


.focus .btn span.on
{
    background: #fff;}
.focus .preNext
{
    width: 45px;
    height: 100px;
    position: absolute;
    top: 90px;
    /*background: url("https://www.manicreation.com/dfiles/16548/content/main/images/nav/master_sprite.png") no-repeat 0 0;*/
    cursor: pointer;}
.focus .pre
{
    left: 0;}
.focus .next
{
    right: 0;
    background-position: right top;}