/* 头部 */
.return{
    width: .2rem;
    height: .2rem;
}
#header .logo {
    margin-left: 0rem;  
}
#header{
    background: #f3f3f3;
}

/* 标题 */
.main_title{
    width: 100%;
    height: .55rem;
    margin-bottom: .17rem;
}

/* 导航栏 */
#nav{
    height: .37rem;
    display: flex;
    justify-content: space-between;
    text-align: center;
    margin-top: .02rem;
}
#nav a{
    width: 33.1%;
    height: .37rem;
    line-height: .37rem;
    background: #e3e3e3
}
#nav a:hover{
    background: #de161c;
    color: #fff;
    font-weight: bold;
}


#nav .on{    background: #de161c;
    color: #fff;
    font-weight: bold;}

/* 图片 */
.original_img{
    width: 100%;
    height: 5.4rem;
    padding: .25rem .15rem; 
}

/* btn */
.btn{
    width: 100%;
    height: .37rem;
    line-height: .37rem;
    display: flex;
    padding: 0 .34rem;
    justify-content: space-between;
    text-align: center;
    margin-bottom: .25rem;
}
.btn a{
    width: 1.3rem;
    height: .37rem;
}
.btn .btn_left{
    color: #fff;
    background: #858585;
}
.btn .btn_right{
    color: #fff;
    background: #de161c;
}