.banner_bg{width: 100%; height: 500px; background: #041729;}
.banner{width: 1280px; height: 500px; margin: 0 auto;}

.product_bg{width: 100%; height: 100%; background: #F7F8FC;}

.product_title{width: 1100px; height: 60px; margin: 0 auto;}
.product_title > .product_back{width: 26px; height: 60px;}
.product_title > .product_back > a{display: block; width: 26px; height: 60px; background: url("../images/product/back.png") 50% 50% no-repeat;}
.product_title > .product_back > a:hover{background: url("../images/product/back(hover).png") 50% 50% no-repeat;}
.product_title > p{width: 500px; height: 60px; margin: 0 auto; line-height: 60px; font-size: 36px; text-align: center; position: relative; top: -60px;}

.product_content{width: 1100px; height: 100%; margin: 0 auto;}

p.content{line-height: 25px; font-size: 16px;}

div.pic{width: 1099px; height: 638px; margin: 0 auto; background: url("../images/product/maintain_computer_bg.png") no-repeat; position: relative;}
.pic_container{width: 474px; height: 295px; overflow: hidden; position: absolute; left: 314px; top: 231px;}
.pic_container > ul{width: 474px; height: 295px; list-style: none; position: absolute;}
.pic_container > ul > li{width: 474px; height: 295px; float: left;}