*{
    margin: 0;
    padding: 0;
}
/* html { height:100%;  }   */
body{
    height: 100%;
    position: relative;
}
img{
    width: 100%;
}
button{
    background: linear-gradient(135deg, #FE2670 0%, #FE739B 100%);
    border-radius: 0.44rem;
    border: none;
    font-size: 15px;
    font-family: "PingFangSC-Medium";
    font-weight: 500;
    color: #FFFFFF;
    line-height: 0.2rem;
    width: 343px;
    height: 44px;
    position: absolute;
    bottom: 3%;
    left: 0;
    right: 0;
    margin: auto;
}
.mask_box{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1;
}
.mask_box_img{
    width: 2.7rem;
    height: 1.78rem;
    position: absolute;
    right: 9%;
    top:0.2rem
}