.Rotation{
    width: 100%;
    height: 500px;
}
.Banner {
    width: 100%;
    position: relative;
    height: 500px;
}
.Banner .item {
    width: 100%;
    height: 500px;
    left: 0;
    top: 0;
    display: none; /*隐藏元素*/
    position: absolute; /* 绝对定位*/
}
.Banner .item:nth-child(1) {
    display: block;
    background: url('/img/banner-bj1.png') no-repeat ;
    background-size: 100% 100%;background-size:cover
}
.Banner .item:nth-child(2) {
    background: url('/img/banner-bj2.png') no-repeat;
    background-size: 100% 100%;background-size:cover
}
.Banner .item:nth-child(3) {
    background: url('/img/banner-bj3.png') no-repeat;
    background-size: 100% 100%;background-size:cover
}
.Banner li {
    float: left;
    padding: 0;
    list-style: none;
    margin: 0;
    padding: 0;
    margin: 0;
    width: 100%;
    height: 500px;
}
.item_box_1 img{
    margin-top: 111px;
}
.form_box{
    position: absolute;
    right: 0;
    top: 62px;
    background: url('/img/form-bj.png') no-repeat;
    background-size: 100% 100%;
    width: 398px;
    height: 387px;
    z-index: 1000
}
.form_box .title{
    padding: 41px;
    font-size: 22px;
    font-weight: 500;
    color: #FFFFFF;
    line-height: 30px;
    text-align: center;
}
.form_input{
    margin-left: 69px;
    display: flex;
    align-items: center;
    width: 280px;
    height: 40px;
    background: #F9F9F9;
    border-radius: 4px;
    opacity: 0.75;
    margin-bottom: 10px;
}
.form_input span{
    display: inline-block;
    width: 76px;
    font-size: 13px;
    color: #000;
    border-right: 1px solid #666;
    margin-right: 29px;
}
.form_input input{
    border: none;
    outline:none;
}
.form_input span i{
    color: #F06F1E;
}
.form_box .button{
    text-align: center;
}
.form_box button{
    width: 130px;
    height: 31px;
    background: #E84411;
    border-radius: 19px;
    font-size: 14px;
    color: #fff;
    border: none;
    cursor: pointer;
}
.item_box_2 img{
    margin-top: 103px;
}
.item_box_3 img{
    margin-top: 100px;
}
.tab-btn{
    position: absolute;
    left: 47%;
    top: 558px;
    z-index: 1001;
}
.tab-btn .btn {
    display: block;
    width:40px;
    height: 3px;
    opacity: 0.3;
    float: left;
    cursor: pointer;
    z-index: 2;
    background: #fff;
    margin-left: 20px;
}

.tab-btn .btn:nth-child(2) {
    margin-left: 20px;
}

.tab-btn .btn:nth-child(3) {
    margin-left: 20px;
}

.tab-btn .btn:hover {
    opacity: 1;
}

.tab-btn .active {
    opacity: 1;
}