@media screen and (max-width:500px){
  .wrap {padding-top:2.8rem;}
  .login__ {margin:2rem auto 0;}
  .login__ > .title h2 {font-size:1.7rem;line-height:1.8rem;}
  .login_form .login > small {font-size:0.6rem;letter-spacing:-0.19px;}
  .set__ .flex.a1 span , .set__ .flex.a2 a {font-size:0.65rem; letter-spacing:-0.2px;}
  .set__ .flex.a2::before {top:50%; font-size:0.6rem;}
  .btn {margin-top:2.5rem;}
  .btn > div {min-height:2.8rem; box-sizing: border-box;}
  .btn > .sign {min-height:2.8rem; box-sizing: border-box;}
  .btn > div a {font-size:0.75rem;letter-spacing:-0.23px;padding:0.95rem 0;}
}