.wechat-login-dialog {
    box-sizing: border-box;
    width: min(420px, calc(100% - 28px));
    max-height: calc(100vh - 28px);
    margin: auto;
    padding: 22px 20px 14px;
    border: 0;
    border-radius: 12px;
    color: #24282d;
    background: #fff;
    box-shadow: 0 12px 60px #0003;
    font: 14px/1.5 "Microsoft YaHei", sans-serif;
}
.wechat-login-dialog::backdrop { background: #0007; }
.wechat-login-heading { display: flex; align-items: center; justify-content: space-between; }
.wechat-login-heading h2 { margin: 0; font-size: 21px; font-weight: 500; }
.wechat-login-close { width: 32px; height: 32px; padding: 0; border: 0; border-radius: 4px; color: #666; background: transparent; font: 28px/1 sans-serif; cursor: pointer; }
.wechat-login-close:hover { color: #222; background: #f1f2f4; }
.wechat-login-close:focus-visible { outline: 2px solid #169c52; outline-offset: 2px; }
.wechat-login-description { margin: 7px 0 12px; color: #777; font-size: 13px; }
#wechat-login-frame { display: block; width: 100%; height: 450px; border: 0; }