*{
    margin: 0 auto;
    padding: 0;
}
.clearfix::before,
.clearfix::after{
    content: '';/*前两行+::before解决了外边距重叠的问题，使用了‘’把子元素和父元素隔开，"相邻"外边距就不成立了。*/
    display: table;/*使用table元素可以同时解决高度塌陷和外边距重叠的问题*/
    clear: both;/*后两行+::after解决了高度塌陷的问题。*/
}
body{
    font-family: '微软雅黑';
}
a{
    text-decoration: none;
    color:#3b3b3b;
}
header{


}
.content{
    width: 1496px;/*这句是我自己加的*/
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.cacta_img{
    width:60%;
}
.cacta_img img{
    width:100%;
}
.back_index{
    width:40%;
}
.arrow_left,.arrow_right{
    width:5%;

}
.arrow_left img,.arrow_right img{
    width:100%;
}
.arrow_font{
    width:14%;
    font-size: 1rem;
    line-height: 1.5;
    text-align: center;
    min-width: 4rem;
}

main{

}

footer{
    clear:both;
    padding: 5rem;
    text-align: center;
    font-size: 0.75rem;
    background-color: #e8e8e8;
}

.sign{
    width:28%;
    text-align: right;

}
.info_cacta{
    width:44%;
}
.row_info{
    line-height: 1.5rem;
    width: 80%;
    text-align: left;
}
.row_info span{
    color:#50504e;
}
.row_info span a{
    color:#50504e;
    text-decoration: none;
}
.wechat{
    width:28%;
    display: block;
    text-align: left;
    padding-top:1.7rem !important;
}
.wechat img{
    width: 4rem;
    height: 4rem;
}
@media screen and (max-width: 1077px) and (min-width: 992px) {
    .sign{
        width: 6rem;
    }
    .wechat{
        width: 6rem;
    }
    .info_cacta{
        width: calc(100% - 12rem);
    }
}
@media screen and (max-width: 992px) {
    .cacta_img{
        width: calc(100% - 9rem);
    }
    .back_index{
        width: 9rem;
    }
    .arrow_left,.arrow_right{
        width:2rem;
    }
    .arrow_font{
        font-size: 0.8rem;
        width:30%;
        min-width: 3.5rem;
    }
    footer{
        padding:3rem 0;
    }
    .sign{
        display: none;
    }
    .info_cacta{
        width:100%;
    }
    .info_cacta .row_info{
        width:90%;
    }
    .row_info{
        text-align: center;
    }
    .wechat{
        display: none;
    }
}