#details .password .passForm{
  width: 400px;
  margin: 0 auto 10px;
}

#details .password .passForm:last-child{
  margin-bottom: 0;
}

#details .password .memno{
  width: 10em;
  font-size: 1.2em;
}

#details .password .mail{
  width: 100%;
  font-size: 1.2em;
}

#details .password .passInput{
  display: inline-block;
  width: calc(100% - 10em);
  vertical-align: top;
}

@media screen and (max-width: 499px) {
  #details .password .passForm{
    width: auto;
    max-width: 250px;
  }
  #details .password .passInput{
    display: block;
    width: 100%;
  }
  #details .password .mail{
    width: 95%;
  }
}