/* ========= 手机导航栏：箭头朝下 + 文字左对齐 + 箭头靠右且可调 ========= */
@media (max-width: 991.98px) {
    .navbar-collapse {
        width: 45%;
        padding: 0;
    }

    /* 所有菜单项文字右移一点 */
    .navbar-nav .nav-link {
        padding-left: 1.2rem;
    }

    /* 下拉菜单项：文字靠左 */
    .mobile-dropdown > .dropdown-toggle {
        display: flex !important;
        align-items: center !important;
        justify-content: flex-start !important;   /* 文字左对齐 */
    }

    /* 箭头样式 + 靠右控制 */
    .mobile-dropdown > .dropdown-toggle::after {
        display: inline-block !important;
        width: 0 !important;
        height: 0 !important;
        margin-left: auto !important;          /* 箭头推到最右边 */
        margin-right: 1.5rem !important;       /* 调箭头离右边界的距离，越大箭头越靠左 */
        vertical-align: middle !important;
        content: "" !important;
        border-top: 0.35em solid !important;
        border-right: 0.35em solid transparent !important;
        border-bottom: 0 !important;
        border-left: 0.35em solid transparent !important;
        transform: none !important;
        -webkit-transform: none !important;
        transition: none !important;
    }
}