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Correction status：qualified
Teacher's comments：看上去还不错, 再完善一下细节就可以用了
Collection
Collection
css：
body,ul,ol,h2{margin: 0;padding: 0;}
body{font-size: 12px;background-color: #f4f4f4;}
li{list-style: none;}
a{text-decoration: none;}
.m{margin: 0 auto;}
.hidden{overflow: hidden;}
.float-left{float: left;}
.float-right{float: right;}
.text-center{text-align: center;}
.w1200{width: 1200px;}
.header,.footer{width: 100%;height:50px;background-color: #000;}
/* nav */
.nav a{width:110px;line-height:50px;text-align:center;color:#fff;float: left;font-size: 16px;}
.nav a:hover{background-color: #444;}
/* banner */
.banner{ height:500px; background: url(https://aecpm.alicdn.com/simba/img/TB1_JXrLVXXXXbZXVXXSutbFXXX.jpg) center top no-repeat #e8e8e8; }
/* main */
.main{margin: 15px auto;}
.main .left,.main .right{ width: 200px; background-color: #fff; padding: 10px 10px 15px; }
.main .left h2,.main .right h2{ padding: 5px 0 10px; font-size: 16px; }
.main .left li{ width: 200px; height:26px;}
.main .left li span{padding: 0 3px;font-size: 14px;}
.main .left li a{ line-height: 26px; color:#333;font-size: 14px;}
.main .left li a:hover{color:#e1251b;}
.main .content{width: 732px; margin-left: 10px;padding: 4px; background-color: #fff;}
.main .content li{ width: 220px; padding: 12px; margin-bottom: 26px; float: left;}
.main .content li:hover{ box-shadow: 0px 6px 10px 0px #888;}
.main .content li img{ width: 100%; display: block;}
.main .content li .cont a span{height:40px;line-height:20px;font-size: 12px;color:#666;display: block;overflow: hidden;}
.main .content li .bottom{width: 100%;padding-top:14px;}
.main .content li .bottom span{line-height:36px;color:#e4393c;font-size: 20px;}
.main .content li .bottom a{width:100px;line-height:36px;border-radius:4px;background-color:#e4393c;font-size: 14px;color:#fff;text-align: center;display: block; float:right;}
.main .right li{ width: 200px; padding-bottom: 26px; }
.main .right li img{ width: 100%; display: block;}
.main .right li .cont a span{height:40px;line-height:20px;font-size: 12px;color:#666;display: block;overflow: hidden;}
.main .right li .bottom{width: 100%;padding-top:14px;}
.main .right li .bottom span{line-height:36px;color:#e4393c;font-size: 20px;}
.main .right li .bottom a{width:100px;line-height:36px;border-radius:4px;background-color:#e4393c;font-size: 14px;color:#fff;text-align: center;display: block; float:right;}
/* footer */
.footer{ line-height: 50px; color:rgba(255,255,255,.7); }
.footer a{font-size: 12px; color:rgba(255,255,255,.7); }html：
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