html, body{
    background-color: #f1f2f6;
}
h2{
    color: #333;
    font-size: 30px;
    text-align: center;
}
.topic .container{
    color: #333;
}
.toggle{
    cursor: pointer;
}
#tg1{
    display: block;
    margin: auto;
    width: 60px;
}
#iframer{
    background: #fff;
    overflow: hidden;
    width: 100%;
    height: 400px;
    border-radius: 10px;
    border: 1px solid #ddd;
    padding: 5px;
}
#iframer iframe{
    width: 100%;
    height: 100%;
    border: none;
}
#msg{
    display: none;
}
option.optno, .selecter-item[data-value=data]{
    color: red;
}
.btn-success{
    padding: 6px 14px;
}