* {
    box-sizing: border-box;
}

html, body {
    width: 100% !important;
    overflow-x: hidden !important; /* 防止页面水平滚动 */
    margin: 0 !important;
    height: 100% !important;
}
.footer{
    padding: 10px;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
}

.footer span{
    font-size: 17px;
    color: #fff;
    font-weight: 700;
}
.btn_back {
    position: absolute;
    left: 10rem;
    top: 10rem;
    width: 50px;
    height: 50px;
    z-index: 9999;
}
.btn_back_img {
    width: 100%;
    height: 100%;
}

.modal_kf {
    width: 750rem;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    position: fixed;
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.kf_modal_close{
    position: absolute;
    right: -14rem;
    width: 100rem;
}
.kf_modal_title{
    position: absolute;
    font-size: 70rem;
    color: #fff;
    font-weight: 600;
    text-align: center;
    margin-bottom: 20rem;
    width: 100%;
    top: 92rem;
}
.kf_modal_content{
    position: absolute;
    z-index: 100;
    top: 150rem;
    color: #fff;
    font-size: 40rem;
    width: 450rem;
    padding: 50rem 80rem;
    margin-top: 100rem;
    height: 372rem;
    margin-left: 75rem;
    border-radius: 40rem;
}

.kf_modal_img{
    width: 100%;
}
/*客服悬浮*/
.kf_xf {
    width: 40px;
    height: 40px;
    position: fixed;
    background: #fffbfb;
    right: 5px;
    bottom: 100px;
    border-radius: 50%;
}
.app_down {
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    position: fixed;
    background: #fffbfb;
    left: 5px;
    bottom: 100px;
    border-radius: 50%;
}