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: #343434;
    color: #fff;
}

.suppt-list ul {
    margin: 0 20px;
}

.suppt-list {
    background-color: #343434;
    color: #fff;
    font-size: 16px;
}

.footer {
    width: 100%;
    /*height: 416px;*/
    /*position: relative;*/
    background-image: url('../BG-foot.jpg');
}

.foot_iocn {
    position: absolute;
    width: 100%;
    height: 128px;
    left: 15%;
    top: 5%;
}

.os-list {
    font-size: 20px;
    color: aliceblue;
    margin-left: 500px;
    margin-right: 100px;
}

.browser-list {
    font-size: 20px;
    color: aliceblue;
}

.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;
}

.copyright {
    /*margin-top: 100px;*/
    left: 40%;
    font-size: 22px;
    color: aliceblue;
}