body {
  min-width: 1440px;
}
.banner {
  background-color: #1B1B21;
  height: 400px;
  text-align: center;
}
.banner img {
  width: 1440px;
}
.item-box {
  background-color: #fff;
  height: 550px;
}
.item-box.bgf5 {
  background-color: #F5F5F5;
}
.item-box.bgeee {
  background-color: #EFEFEF;
}
.item-box .item {
  overflow: hidden;
  width: 1440px;
  margin: 0 auto;
  height: 100%;
  position: relative;
  background-size: 1440px auto;
}
.item-box .item .item-title {
  display: inline-block;
  font-size: 40px;
  margin-bottom: 40px;
}
.item-box .item .item-content {
  font-size: 20px;
  position: absolute;
}
.item-box .item .item-content.left {
  top: 180px;
  left: 170px;
}
.item-box .item .item-content.right {
  top: 218px;
  left: 650px;
}
.item-box .item .right-phone {
  position: absolute;
  top: 95px;
  right: 178px;
  width: 355px;
}
.item-box .item .left-phone {
  position: absolute;
  top: 88px;
  left: 170px;
  width: 355px;
}
.item-box .one {
  background-image: url(../img/product-mini/bg1.png);
}
.item-box .two {
  background-image: url(../img/product-mini/bg2.png);
}
.item-box .three {
  background-image: url(../img/product-mini/bg3.png);
}
.item-box .four {
  background-image: url(../img/product-mini/bg4.png);
}