/* 預設藍色主題 */
:root {
    --theme-primary: #2563eb;
    --theme-primary-dark: #1d4ed8;
}
.bg-primary { background-color: var(--theme-primary) !important; }
.btn-primary { background-color: var(--theme-primary) !important; border-color: var(--theme-primary) !important; }
.btn-primary:hover { background-color: var(--theme-primary-dark) !important; border-color: var(--theme-primary-dark) !important; }
.btn-outline-primary { color: var(--theme-primary) !important; border-color: var(--theme-primary) !important; }
.btn-outline-primary:hover { background-color: var(--theme-primary) !important; border-color: var(--theme-primary) !important; color: #fff !important; }
.text-primary { color: var(--theme-primary) !important; }
a { color: var(--theme-primary); }
a:hover { color: var(--theme-primary-dark); }