body{
    font-size: 0;
    margin: 0;
    padding: 0;
}
.suppt_top{
    height: 30px;
    background-color:black;
} 
.suppt_top h1{
    font-size: 20px;
    color: aliceblue;
    text-align:center;
    
}

    .feature-clause-content{
        font-size: 16px;
        background-color: rgb(195, 235, 221);
        overflow: hidden;
    }
    
    .suppt-list ul{
        margin:0 20px ;
    }
    .suppt-list{
        background-color: rgb(190, 233, 218);
        font-size: 16px;
    }
    .footer {
        width: 100%;
        height: 100%;
        position: relative;
        background-image: url(../img/BG3.jpg);
        overflow: hidden;
    }
    .foot_iocn{
        position: absolute;
        width: 100%;
        height: 128px;
        left: 15%;
        top: 5%;
    }
    
    .os ul li {
        list-style-type: none;
    }

    .os-list {
        position: absolute;
        font-size: 20px;
        color: aliceblue;
        left: 20%;
    }
    
    .browser-list {
        font-size: 20px;
        color: aliceblue;
        margin-left: 50%;
       
    }
    
    .footer-nav {
        font-size: 20px;
        text-align: center;
        margin-top: 30px;
    }
    
    .footer-nav-list {
        display: inline-block;
    }
    
    .footer-nav-list li {
        float: left;
    }
    
    .footer-nav-list li a {
        padding: 0 30px;
        bottom: 30px;
        margin-top: 40px;
        color: aliceblue;
    }
    
    .copyright {
        margin-top: 100px;
        left: 40%;
        font-size: 22px;
        color: aliceblue;
    }