.login {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: #f0f2f5;
}

.login .box {
  width: 400px;
  background: #fff;
  box-shadow: 1px 1px 1px #fff;
  padding: 10px;
}

.login .box h2 {
  text-align: center;
  margin-bottom: 20px;
}

.main {
  padding: 0px 0;
  width: 900px;
  height: 500px;
  margin: 0 auto;
}

.main #myVideo {
  width: 100%;
  height: 480px;
  background: #000000;
  position: relative
}

.main .btn-group {
  display: flex;
  flex-direction: row;
  justify-content: center;
  padding: 10px 0;
}

.main .btn-box {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}

.help {
  height: 30px;
  line-height: 30px;
  text-decoration: underline;
}
.setBox {
  padding-top: 20px;
  padding-right: 20px;
}