.bg {
  overflow: hidden;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  position: absolute;
  z-index: -5;
  zoom: 1;
  background-attachment: fixed;
  background: center 0;
}

.bg img {
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  position: fixed;
}

.top {
  position: absolute;
  top: 0;
  height: 56px;
  left: 0;
  right: 0;
  background-color: rgba(0, 18, 49, 0.2);
}

.time {
  color: #fff;
  line-height: 56px;
  font-size: 18px;
}

.container {
  width: 1200px;
  margin: 0 auto;
}

.main {
  width: 1200px;
  height: 505px;
  position: absolute;
  top: 50%;
  margin-top: -252px;
  left: 50%;
  margin-left: -600px;
}

.logo {
  display: block;
  margin: 0 auto;
}

.login {
  padding-top: 125px;
  font-size: 0;
  -webkit-text-size-adjust: none;
  text-align: center;
}

.login-item {
  display: inline-block;
  width: 216px;
  height: 100px;
  padding-top: 160px;
  margin: 0 62px;
  font-size: 20px;
  color: #fff;
  text-align: center;
  vertical-align: top;
  -webkit-box-shadow: 0px 17px 75px 0px rgba(0, 31, 89, 0.65);
          box-shadow: 0px 17px 75px 0px rgba(0, 31, 89, 0.65);
}

.login-item:nth-child(1) {
  background-image: url("../images/login_item1.png");
}

.login-item:nth-child(2) {
  background-image: url("../images/login_item2.png");
}

.login-item:nth-child(3) {
  background-image: url("../images/login_item3.png");
}

.login-item-sc {
  color: #fff;
  font-size: 20px;
}

.login-item-sc2 {
  font-size: 16px;
  color: red;
}