.PangMenZhengDao,
.OPPOSans-B,
.OPPOSans-M,
.OPPOSans-R {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}
.PangMenZhengDao {
    font-weight: 700; /* 原来庞门正道是标题粗体 */
}
.OPPOSans-B {
    font-weight: 700;
}
.OPPOSans-M {
    font-weight: 500;
}
.OPPOSans-R {
    font-weight: 400;
}