body,html,header,main,footer,div,ul,li,img,a,span,button,input,textarea,table,tr,th,td,p,select,option{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  color: #333;
  font-size: 14px !important;
  font-family: Arial, 'Microsoft Yahei';
}
li{
  list-style-type: none;
}
a {
  color: inherit;
  outline: none;
  text-decoration: none;
  cursor: pointer;
}
input,button,textarea,select{
  outline: none;
  border-style: none;
}
input::placeholder{
  color: #c2c2c2;
}
textarea::placeholder{
  color: #c2c2c2;
}
textarea{
  resize: none;
}