手机自适应

@media only screen and (max-width: 1080px), only screen and (max-device-width:1080px) {
    html,body {
        font-size:16.875px;
    }
}
@media only screen and (max-width: 960px), only screen and (max-device-width:960px) {
    html,body {
        font-size:15px;
    }
}
@media only screen and (max-width: 800px), only screen and (max-device-width:800px) {
    html,body {
        font-size:12.5px;
    }
}
@media only screen and (max-width: 720px), only screen and (max-device-width:720px) {
    html,body {
        font-size:11.25px;
    }
}
@media only screen and (max-width: 640px), only screen and (max-device-width:640px) {
    html,body {
        font-size:10px;
    }
}
@media only screen and (max-width: 600px), only screen and (max-device-width:600px) {
    html,body {
        font-size:9.375px;
    }
}
@media only screen and (max-width: 540px), only screen and (max-device-width:540px) {
    html,body {
        font-size:8.4375px;
    }
}
@media only screen and (max-width: 480px), only screen and (max-device-width:480px) {
    html,body {
        font-size:7.5px;
    }
}
@media only screen and (max-width: 414px), only screen and (max-device-width:414px) {
    html,body {
        font-size:6.46875px;
    }
}
@media only screen and (max-width: 400px), only screen and (max-device-width:400px) {
    html,body {
        font-size:6.25px;
    }
}
@media only screen and (max-width: 375px), only screen and (max-device-width:375px) {
    html,body {
        font-size:5.859375px;
    }
}
@media only screen and (max-width: 360px), only screen and (max-device-width:360px) {
    html,body {
        font-size:5.625px;
    }
}
@media only screen and (max-width: 320px), only screen and (max-device-width:320px) {
    html,body {
        font-size:5px;
    }
}
@media only screen and (max-width: 240px), only screen and (max-device-width:240px) {
    html, body {
        font-size: 3.75px;
    }
}