.wrap {
  background: url("../img/bg.jpg") no-repeat top center #120707; }

.main_cont {
  width: 1000px;
  margin: 0px auto;
  position: relative; }

.main_ul {
  width: 1000px;
  overflow: hidden; }

.main_ul li {
  position: relative;
  float: left; }

.main_ul li img {
  display: block; }

.retrun_index {
  display: block;
  width: 115px;
  height: 30px;
  position: absolute;
  right: -18px;
  top: 15px;
  background: url(about:blank); }

.a1 {
  display: block;
  width: 87px;
  height: 23px;
  position: absolute;
  left: 142px;
  top: 209px;
  background: url(about:blank);
  z-index: 99; }

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