/* 1. 物理级封锁：在页面加载的 0 毫秒就隐藏所有原厂导航 */
    header, #header, .header, .site-header, .uee-header, .nav-container, #navigation-bar { 
        display: none !important; 
        opacity: 0 !important; 
        visibility: hidden !important; 
        height: 0 !important; 
    }
    /* 2. 强制 Body 归位 */
    body { padding-top: 0 !important; margin-top: 0 !important; }