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)}