*{box-sizing: border-box;}
body,div,ul,li,h1,h2,h3,h4,h5,h6,p { margin:0; padding:0; }
body { font-size: 16px; font-family: '微软雅黑'; background-color: #F9FAFC;}
img { border:0; display: inline-block; width: 100%;} 
ul {  list-style:none; } 
h1,h2,h3,h4,h5,h6 {  font-size:100%; color: #333;  font-weight:normal;  }
a{ text-decoration: none; color: #666; }
html,body { width: 100%; height: 100%; position: relative; }
.content{
    margin: 0 auto;
    background: #F9FAFC url(https://www.bjzs.cn/skin/static/img/body.jpg) no-repeat center;
    width: 720px; 
    height: 800px;
    background-size: cover;
}
.content .main{
    padding-top: 290px;
    text-align: center;
}
.content .main h1{
    font-size: 36px;
    font-weight: 900;
    color: #F85766;
}
.content .main .img{
    display: inline-block;
    width: 150px;
    margin: 15px 0;
}
.content .main h3 { 
    line-height: 24px; 
}
.content .main .tel{
    margin: 20px 0 50px;
}
.content .main .tel a{
    font-size: 22px;
}
.content .main .back a{
    border: 1px solid #e4e4e4;
    padding: 8px 20px;
}

.content .main .back a.index{
    background-color: #5398FF;
    color: #fff;
    margin-right: 20px;
}
.content .main .back a:hover{
    opacity: .8;
}


@media screen and (max-width: 1200px){
    body{
        width: 100%;
    }
    .content{
        width: 100%;
        background: none;
        height: auto;
        padding: 10px;
    }
    .content .main{
        padding-top: 50px;
    }
    .content .main h1{
        font-size: 20px;
    }
    .content .main .img{
        width: 140px;
    }
}
@media screen and (max-width: 280px){
    .content .main .back a{
        padding: 5px 10px;
    }
    .content .main .back a.index{
        margin-right: 5px;
    }
    .content .main .tel a{
        font-size: 16px;
    }
}