.divcss5 {
    position: fixed;
    bottom: 0;
}

.page-brand.back {
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
}

/* 忘记密码 / 找回密码：深浅色（html.fb-user-root + data-fb-theme） */
html.fb-user-root[data-fb-theme="dark"] body.page-brand.back {
    background-color: #0f172a !important;
    background-blend-mode: multiply;
}

html.fb-user-root[data-fb-theme="dark"] .auth-main,
html.fb-user-root[data-fb-theme="dark"] .auth-main.auth-row {
    background: rgba(30, 41, 59, 0.94) !important;
    border: 1px solid rgba(148, 163, 184, 0.22);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
    color: #e2e8f0;
}

html.fb-user-root[data-fb-theme="dark"] .auth-main .floating-label {
    color: #94a3b8;
}

html.fb-user-root[data-fb-theme="dark"] .auth-main .form-control,
html.fb-user-root[data-fb-theme="dark"] .auth-main .maxwidth-auth {
    background: rgba(15, 23, 42, 0.85) !important;
    border-color: rgba(148, 163, 184, 0.28) !important;
    color: #e2e8f0 !important;
}

html.fb-user-root[data-fb-theme="dark"] .auth-main .boardtop-left,
html.fb-user-root[data-fb-theme="dark"] .auth-main .boardtop-right,
html.fb-user-root[data-fb-theme="dark"] .auth-main .tgauth,
html.fb-user-root[data-fb-theme="dark"] .auth-main .tgauth a {
    color: #cbd5e1;
}

html.fb-user-root[data-fb-theme="dark"] .modal-content {
    background: #1e293b !important;
    color: #e2e8f0;
}

html.fb-user-root[data-fb-theme="dark"] .modal-inner .text-black-hint {
    color: #cbd5e1 !important;
}

html.fb-user-root[data-fb-theme="light"] body.page-brand.back {
    background-blend-mode: normal;
}