body {
    height: 100vh;
    width: 100vw;
    background: url(../images/beijing.png) no-repeat;
    background-size: 100% 100%;
    -webkit-background-size: 100% 100%; /* 兼容Webkit内核浏览器如Chrome和Safari */
    -o-background-size: 100% 100%; /* 兼容Opera */
}

.biggest-box {
    width: 100%;
    height: 100%;
    margin: 0 auto;
    display: -webkit-flex;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    padding-top: 40px;
    box-sizing: border-box;
}

.biggest-box .login_item {
    width: 472px;
    height: 386px;
    background: url(../images/login_bg.png) no-repeat;
    display: -webkit-flex;
    display: flex;
    justify-content: center;
    align-items: center;
    background-size: contain;
}

.biggest-box .login_item .login_div {
    width: 84%;
    height: 89%;
    border-radius: 10px;
    background-color: #f4f4f4;

}

.biggest-box .login_item .login_div form {
    display: -webkit-flex;
    display: flex;
    /*justify-content: space-around;*/
    align-items: center;
    flex-direction: column;
    width: 100%;
    height: 100%;
}

.biggest-box .login_item .login_div .yhdl {
    font-size: 24px;
    color: #0f49b2;
    font-weight: bold;
}

.biggest-box .login_item .login_div .ipdl {
    font-size: 24px;
    color: #999999;
    font-weight: bold;
}

.biggest-box .login_item .login_div .fgfdl {
    font-size: 24px;
    color: #dadada;
    margin: 0 15px;
}

.biggest-box .login_item .login_div .loin {
    display: -webkit-flex;
    display: flex;
}

.biggest-box .login_item .login_div .loin .loicon {
    background-color: #0f49b2;
    display: inline-block;
    padding: 10px;
    border-top-left-radius: 5px;
    border-bottom-left-radius: 5px;
}

.biggest-box .login_item .login_div .loin .ipt {
    font-size: 16px;
    border: 1px solid #0f49b2;
    padding-left: 8px;
    border-top-right-radius: 5px;
    border-bottom-right-radius: 5px;
    background-color: #f4f4f4;
    width: 280px;
}

.biggest-box .login_item .login_div .sbtn {
    font-size: 28px;
    border-radius: 5px;
    background-color: #0f49b2;
    width: 338px;
    border: none;
    color: #ffffff;
    padding: 5px 0px 10px 0px;
    cursor: pointer;
}

.biggest-box .footer_item .shuom {
    color: #0f49b2;
    font-size: 16px;
}

.footer_item {
    display: flex;
    align-items: flex-end;
    flex: 1;
    margin-bottom: 12px;
}
.top_item {
    display: flex;
    align-items: flex-end;
    flex: 1;
}

.center_login_div {
    margin-top: 20px;
    flex: 1;
}

@media screen and (max-height: 768px) {
    .biggest-box .login_item {
        width: 412px !important;
        height: 334px !important;
    }
    .biggest-box .login_item .login_div .loin .ipt {
        width: 230px !important;
    }
    .biggest-box .login_item .login_div .sbtn {
        width: 274px !important;
        font-size: 26px !important;
        padding: 3px 0px 7px 0px !important;
    }
    .biggest-box .login_item .login_div .loin .loicon {
        padding: 6px !important;
    }
    .biggest-box .login_item .login_div .loin .loicon img{
        width: 22px !important;
    }
    .login_btn_div {
        margin-top: 28px !important;
    }
    .top_item img {
        width: 300px !important;
    }
}