* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    border: none;
    -webkit-tap-highlight-color: rgba(0,0,0,0);
}

html {
    font-size: calc(100vw/7.5);
    height: 100%;
    width: 100%;
}

body {
    font-family: 'PingFang_Medium';
    font-size: 0.3rem;
    position: relative;
    width: 100%;
    height: 100%;
}

@media only screen and (min-width: 750px) {
    body {
        width: 750px;
        margin: 0 auto;
    }
}