/* 橙色下划线 - 主推方案 */
.navbar.is-info .navbar-item.is-active {
    color: #fff !important;
    font-weight: 600;
    position: relative;
}

/* 橙色下划线效果 */
.navbar.is-info .navbar-item.is-active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 70%;
    height: 3px;
    background-color: #FF8C00;  /* 深橙色 */
    border-radius: 1.5px;
    animation: underline-appear 0.3s ease-out;
}

/* 动画效果 */
@keyframes underline-appear {
    from {
        width: 0;
        opacity: 0;
    }
    to {
        width: 70%;
        opacity: 1;
    }
}