/* 强制移动端菜单样式（高优先级） */
@media (max-width: 991px) {  /* 使用 991px 确保覆盖大多数平板和手机 */
    .navbar-collapse {
        position: absolute !important;
        top: 100% !important;
        right: 0 !important;
        left: auto !important;
        width: 260px !important;
        background: #ffffff !important;
        border-radius: 16px !important;
        box-shadow: 0 10px 30px rgba(0,0,0,0.15) !important;
        padding: 12px 0 !important;
        z-index: 9999 !important;
        border: 1px solid #e9ecef !important;
    }
    .navbar-nav {
        flex-direction: column !important;
        width: 100% !important;
    }
    .nav-item {
        width: 100% !important;
        border-bottom: 1px solid #f0f0f0 !important;
    }
    .nav-link {
        padding: 12px 20px !important;
        color: #1e2a3a !important;
        text-align: left !important;
        font-size: 0.95rem !important;
    }
    .nav-link:hover {
        background: #f5f7fa !important;
        color: #0a4b6e !important;
    }
    /* 移除可能导致冲突的伪元素 */
    .nav-link::after {
        display: none !important;
    }
}