html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}
body {
  background: url('../img/bg.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.login_title {
  width: 50%;
  margin: 0 auto;
  display: block;
}
.form {
  width: 30%;
  margin: 0 auto;
  display: block;
  margin-top: 3%;
  background-color: #fff;
  border-radius: 10px;
  overflow: hidden;
}
#form {
  width: 80%;
  margin: 0 auto;
  display: block;
  padding-top: 8%;
  padding-bottom: 8%;
  overflow: hidden;
}
#form h1 {
  width: 100%;
  text-align: left;
  color: #777;
  font-size: 26px;
  padding-bottom: 8%;
}
.input_box {
  width: 100%;
  margin-bottom: 8.5%;
  position: relative;
  float: left;
  font-size: 14px;
}
.input_box .input_ {
  width: calc(100% - 82px);
  border-radius: 5px;
  height: 3em;
  padding: 0 40px;
  font-size: 14px;
  line-height: 3em;
  border-color: #666;
}
.input_box input:focus {
  border-color: #4b74ea;
}
.input_box i {
  position: absolute;
  width: 15px;
  height: 18px;
  background-repeat: no-repeat;
  background-image: url(../img/login_ico.png);
  top: 12px;
  left: 15px;
}
.input_box .ico_user {
  background-position: 0px 0px;
}
.input_box .ico_password {
  background-position: -15px 0px;
}
.input_go {
  border-radius: 5px;
  height: 3em;
  line-height: 3em;
  width: 100%;
  float: left;
  background-color: #4b74ea;
  border: 0;
  display: block;
  color: #fff;
  text-align: center;
  font-size: 16px;
  cursor: pointer;
}
.input_go:hover {
  background-color: #3835d4;
}
.state_on {
  padding-top: 20px;
  width: 100%;
  text-align: center;
  display: block;
  font-size: 12px;
  float: left;
  color: red;
}
.none {
  display: none;
}