.bottom_logo{width:100%;position:fixed;z-index:20;pointer-events:none;bottom:calc(64px + env(safe-area-inset-bottom));text-align:center;filter:Gray;-webkit-filter:grayscale(100%);opacity:.85}.bottom_logo div{margin-bottom:5px;color:grey}.lang-switch{position:fixed;top:8px;right:8px;z-index:1000;padding:6px 8px;border-radius:6px;background:hsla(0,0%,100%,.92)}.lang-label{margin-right:6px;font-size:12px;color:#333}.lang-switch select{border:1px solid #dcdfe6;border-radius:4px;font-size:12px;padding:2px 4px}.van-overlay .van-empty{margin-top:50%}