*{
    padding: 0;
    margin: 0;
    list-style: none;
    text-decoration: none;
}
.shanghao_box{
    width: 1111px;
    height:900px;
    overflow: hidden;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.D_lu{  
    width:100%;
    height:500px;
    display: block;
}
.data_D{
    width: 400px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    margin-top: 100px;
    float: left;
}
.d_biaoti{
    font-size: 35px;
    font-weight: bold;
    margin: 10px 0px;
}
.d2_biaoti{
    font-size: 16px;
    margin: 10px 0px;
    line-height: 25px;
}

.shuru_kuangti{
    width: 400px;
    overflow: hidden;
    margin-bottom:5px;
}
.shuru_kuangti>p:nth-child(1){
    font-size: 14px;
    margin: 10px 0px;
}
.shuru_kuangti>input{
    width: 95%;
    height: 43px;
    outline: none;
    border: solid 2px rgb(78, 78, 78);
    border-radius: 8px;
    padding-left: 15px;
    font-size: 15px;
}
.anniu_a{
    width: 100%;
    height: 45px;
    background-color: black;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    color: #fff;
    font-size: 14px;
    cursor: pointer;
    margin-top: 20px;
}
/* 一个输入字段获得焦点时选择的样式： */
.shuru_kuangti>input:focus{
 border: solid 2px rgb(7, 160, 231);
}
.Dl_img{
    width: 50vh;
    /* background-color: aqua; */
    float: left;
    margin-left: 160px;
    margin-top: 50px;
}
.wangji_a{
    font-size: 13px;
    color: rgb(58, 58, 58);
    cursor: pointer;
    margin-top: 20px;
}

/* 注册 */
.Z_zhuce{
    width:100%;
    height:500px;
    display: none;
}
.zhu_img{
    width: 60vh;
    float: left;
    margin-right: 100px;
}
.zhuce_data{
    width: 400px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    float: left;
}
#sp_dl{
    text-decoration: underline;
    cursor: pointer;
    color:red;
    text-decoration: none;
}
#sp_zc{
    cursor: pointer;
    color:red;
}
/* 当屏幕最大是 750 */
@media (max-width:750px) {
    .shanghao_box{
        width: 450px;
        height: 620px;
        overflow: hidden;
        margin: 0 auto;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    /* 登录 */
    .D_lu{  
        width:100%;
        overflow: hidden;
        display: block;
    }
    .data_D{
        width: 400px;
        overflow: hidden;
        display: flex;
        flex-direction: column;
        margin-top: 70px;
        float: left;
        margin-left: 20px;
    }
    .Dl_img{
        width: 50vh;
        /* background-color: aqua; */
        float: left;
        margin-left: 160px;
        margin-top: -50px;
        display: none;
    }
    /* 注册 */
    .Z_zhuce{
        width:100%;
        height:520px;
        display: none;
        margin-top:50px;
        margin-left: 20px;
    }
    .zhu_img{
        display: none;
    }

}