*{
    padding: 0;
    margin: 0;
    font-family: "微软雅黑";
}
a{
    text-decoration: none;
    color: black;
}
.center{
    margin: 0 auto;
}

.banner{
    margin: 30px auto;
    width: 1200px;
    border: 1px solid #eee;
    border-bottom: 1px solid #ccc;
    border-radius: 5px 5px 0 0;
}
/*切换项标题*/
.title{
    width: 100%;
    height: 50px;
}
.title .title-item{
    float: left;
    border-radius: 5px;
}
.title .bgactive{
    background:#ffcc00;
    font-weight: bold;
}
.title .title-item a{
    width: 300px;
    height: 50px;
    line-height: 50px;
    display: inline-block;
    text-align: center;
    color: #666;
    font-size: 22px;
}
/*切换项内容*/
.content{
    width: 1200px;
    height:460px; 
    position: relative;
}
.content .img{
    position: absolute;
    top: 0;
    left: 0;
    height: 460px;
    width: 1200px;
    display: none;
    background-repeat: no-repeat;
    cursor: pointer;
}
.content .img1{
    background: url("../img/1.jpg");
}
.content .img2{
    background: url("../img/3.jpg");
}
.content .img3{
    background: url("../img/4.jpg");
}
.content .img4{
    background: url("../img/5.jpg");
}
.content .img-active{
    display: block;
}