:root {
        --external-font-family: var(--desktop-font-family, var(--cs-site-font-regular, var(--mobile-font-family, var(--web-font-family))));
    }
    :root[platform='airstar'] {
        --external-font-family: var(--ui-font-family, var(--desktop-font-family, var(--cs-site-font-regular, var(--mobile-font-family, var(--web-font-family)))));
    }
    html body, html body input, html body button, html body textarea, html body input::placeholder, html body textarea::placeholder{
        font-family: var(--external-font-family), PingFangSC-Regular, Microsoft YaHei, HelveticaNeue, Helvetica, sans-serif, -apple-system, system-ui !important;
    }
    html[lang=zh-HK] body, html[lang=zh-HK] body input, html[lang=zh-HK] body button, html[lang=zh-HK] body textarea, html[lang=zh-HK] body input::placeholder, html[lang=zh-HK] body textarea::placeholder {
        font-family: var(--external-font-family), PingFangHK-Regular, Microsoft YaHei, HelveticaNeue, Helvetica, sans-serif, -apple-system, system-ui !important;
    }
    html[lang=en-US] body, html[lang=en-US] body input, html[lang=en-US] body button, html[lang=en-US] body textarea, html[lang=en-US] body input::placeholder, html[lang=en-US] body textarea::placeholder {
        font-family: var(--external-font-family), HelveticaNeue, Helvetica, sans-serif,-apple-system, system-ui !important;
    }
    html[lang=ja] body, html[lang=ja] body input, html[lang=ja] body button, html[lang=ja] body textarea, html[lang=ja] body input::placeholder, html[lang=ja] body textarea::placeholder {
        font-family: var(--desktop-font-family, var(--mobile-font-family, Hiragino Kaku Gothic ProN, Hiragino Sans, Helvetica Neue, sans-serif, Arial, Meiryo)) !important;
    }