body,
html {
    width: 100%;
    height: 100%;
}

@media only screen and (min-width: 1024px) {
    body,
    html {
        font-size: 12px;
    }
}


/*>=1024的设备屏幕*/

@media only screen and (min-width: 1100px) {
    body,
    html {
        font-size: 14px;
    }
}


/*>=1100的设备屏幕*/

@media only screen and (min-width: 1280px) {
    body,
    html {
        font-size: 18px;
    }
}


/*>=1280的设备屏幕*/

@media only screen and (min-width: 1366px) {
    body,
    html {
        font-size: 20px;
    }
}


/*>=1366的设备屏幕*/

@media only screen and (min-width: 1680px) {
    body,
    html {
        font-size: 24px;
    }
}

@media only screen and (min-width: 1440px) {
    body,
    html {
        font-size: 20px;
    }
}


/*>=1440的设备屏幕*/

@media only screen and (min-width: 1680px) {
    body,
    html {
        font-size: 26px;
    }
}


/*>=1680的设备屏幕*/

@media only screen and (min-width: 1920px) {
    body,
    html {
        font-size: 28px;
    }
}


/*>=1920的设备屏幕*/

* {
    margin: 0;
    padding: 0;
}

.left {
    width: 30%;
    float: left
}

.right {
    width: 70%;
    float: right;
}

ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

a {
    text-decoration: none;
}

.brand {
    width: 100%;
    height: 100%;
    max-width: 84rem;
    max-height: 40rem;
    margin: 0 auto;
}

.navigations {
    width: 100%;
    height: 12%;
    box-sizing: border-box;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 999;
}


.navigations ul {
    float: right;
    height: 100%;
    line-height: 4rem;
    padding-right: 1.78rem;
    box-sizing: border-box;
}

.navigations ul li {
    height: 100%;
    float: left;
    padding: 0 .5rem;
}

.navigations ul li img {
    width: .86rem;
    height: .56rem;
}

.navigations ul li span {
    float: left;
    display: block;
    width: 100%;
    height: .2rem;
}


.navigations ul li a {
    float: left;
    display: block;
    padding: 0 .5rem;
    height: 3.8rem;
    font-size: .47rem;
    font-family: PingFang SC;
    color: #1F1F1F;
    box-sizing: border-box;
}