.ios_support_top {
    top: constant(safe-area-inset-top) ;/*为导航栏+状态栏的高度 88px*/
    top: env(safe-area-inset-top) ;
    left: constant(safe-area-inset-left) ; /*如果未竖屏时为0*/
    left: env(safe-area-inset-left) ;
    right: constant(safe-area-inset-right) ; /*如果未竖屏时为0*/
    right: env(safe-area-inset-right) ;
    bottom: constant(safe-area-inset-bottom) ; /*为底下圆弧的高度 34px*/
    bottom: env(safe-area-inset-bottom) ;
}

.ios_support_padding {
    padding-top: constant(safe-area-inset-top) ; /*为导航栏+状态栏的高度 88px*/
    padding-top: env(safe-area-inset-top) ;
    padding-left: constant(safe-area-inset-left) ; /*如果未竖屏时为0*/
    padding-left: env(safe-area-inset-left) ;
    padding-right: constant(safe-area-inset-right) ; /*如果未竖屏时为0*/
    padding-right: env(safe-area-inset-right) ;
    padding-bottom: constant(safe-area-inset-bottom) ; /*为底下圆弧的高度 34px*/
    padding-bottom: env(safe-area-inset-bottom) ;
}