.main_wrapper{
    width:100%;
    overflow: hidden;
    background-image: url('background.png');
    background-size:cover;
    background-repeat: no-repeat;
    min-height: 100vh;
    padding-top: 50px;
}

.bottom_section{
    
}
.bg-red{
    background-color: red;
}
.title{
    font-weight: bold;
    
}
.drag{
            width: 100%;
            height: 40px;
            line-height: 40px;
            background-color: #e8e8e8;
            position: relative;
            margin:0 auto;
        }
        .bg{
            width:40px;
            height: 100%;
            position: absolute;
            background-color: #75CDF9;
        }
        .text{
            position: absolute;
            width: 100%;
            height: 100%;
            text-align: center;
            user-select: none;
        }
        .btn2{
            width:40px;
            height: 38px;
            position: absolute;
            border:1px solid #ccc;
            cursor: move;
            font-family: "宋体";
            text-align: center;
            background-color: #fff;
            user-select: none;
            color:#666;
        }
@media (min-width: 975px){
    .title{
        font-size: 70px;
    }
    .main-wrapper{
        padding-top: 100px;
    }
}