body{
    margin: 0 auto;
    padding: 0 0;
}
.mian{
    width: 70%;
    margin: 0 auto;
    position: relative;
}
.mian img{
    width: 100%;
}
.bug{
    width: 23%;
    height: 11.5%;
    position: absolute;
    right: 5%;
    top: 27%;
    /* background-color: rgba(25, 25, 25, 0.8); */
}

@media(max-width:768px){
    body{
        background: #A2DCF0;
    }
    .mian{
        width: 100%;
    }
}