微信小程序 —— button按钮去除border边框

传统的用“border:none;来去除边框”，依旧有一条细细的border;

/使用 button::after{ border: none; } 来去除边框/
.free-btn-bordernone{
background: none !important;
color: #000 !important;
}
.free-btn-bordernone::after{
border: none;
}
https://blog.csdn.net/Wu_shuxuan/article/details/78209125