a,
img {
    -webkit-touch-callout: none;
}

html {
    touch-action: manipulation; // 处理 IOS10+，click点击 300ms 问题
}
body {
    background-color: #f7f7f7;
}

input {
    line-height: normal;
    border: none;
}

a {
    color: #0af;
    text-decoration: none;
}

* {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

/* 适配 iPhone X 顶部填充*/
@supports (top: env(safe-area-inset-top)){
    body {
        padding-top: constant(safe-area-inset-top, 40px);
        padding-top: env(safe-area-inset-top, 40px);
        padding-top: var(safe-area-inset-top, 40px);
    }
}

/* 判断iPhoneX 将 footer 的 padding-bottom 填充到最底部 */
@supports (bottom: env(safe-area-inset-bottom)){
    body  {
        padding-bottom: constant(safe-area-inset-bottom, 20px);
        padding-bottom: env(safe-area-inset-bottom, 20px);
        padding-bottom: var(safe-area-inset-bottom, 20px);
    }
}