meet_miniprogramr/app.wxss

/**app.wxss**/
@import './miniprogram_npm/@vant/weapp/common/index.wxss';

page{
  --base-color: #ffffff;
  --base-background-00: #ffffff00;
  --base-background: linear-gradient(to right, #2a92bf, #41aaad 50%, #75c48c);

  background: var(--base-background);
  width: 750rpx;
  overflow-y: auto;
  box-sizing: border-box;
}