1.改变字体间间距

使用letter-spacing:5px;可以改变字体间间距

 2.修改placeholder样式

 

input::-webkit-input-placeholder{
  font-family: '\5FAE\8F6F\96C5\9ED1';
  font-weight: 400;
  font-style: normal;
  font-size: 12px;
  color: #000000;
  text-align: left;
  margin-left: 20px;
  letter-spacing:5px;
}
input::-moz-placeholder{   /* Mozilla Firefox 19+ */
  font-family: '\5FAE\8F6F\96C5\9ED1';
  font-weight: 400;
  font-style: normal;
  font-size: 12px;
  color: #000000;
  text-align: left;
  margin-left: 20px;
  letter-spacing:5px;
}
input:-moz-placeholder{    /* Mozilla Firefox 4 to 18 */
  font-family: '\5FAE\8F6F\96C5\9ED1';
  font-weight: 400;
  font-style: normal;
  font-size: 12px;
  color: #000000;
  text-align: left;
  margin-left: 20px;
  letter-spacing:5px;
}
input:-ms-input-placeholder{  /* Internet Explorer 10-11 */
  font-family: '\5FAE\8F6F\96C5\9ED1';
  font-weight: 400;
  font-style: normal;
  font-size: 12px;
  color: #000000;
  text-align: left;
  margin-left: 20px;
  letter-spacing:5px;
}