更改

     backdrop-filter: blur(20px);

     backdrop-filter: blur(20px);

     -webkit-backdrop-filter: blur(20px);

     -webkit-backdrop-filter: blur(20px);

     background-color: rgba(10,70,180,0.6);

     background-color: rgba(10,70,180,1);

}

}

     background-image: linear-gradient(transparent,transparent),url(/w/images/5/51/Up_Arrow.png);

     background-image: linear-gradient(transparent,transparent),url(/w/images/5/51/Up_Arrow.png);

}

}