/* 默认字体白色，无下划线 */
.navbar .nav-link {
    color: #ffffff !important;
    text-decoration: none;
    transition: color 0.3s, text-decoration-thickness 0.3s, text-underline-offset 0.3s;
}

/* 悬浮高亮 + 下划线 */
.navbar .nav-link:hover {
    color: #B48C30 !important;
    /* 暗金色 */
    text-decoration: underline;
    text-decoration-thickness: 0.15em;
    /* 下划线粗细 */
    text-underline-offset: 0.2em;
    /* 下划线与字体的间隔，可调 */
}

/* 激活/当前页面高亮 + 下划线 */
.navbar .nav-link.active {
    color: #B48C30 !important;
    text-decoration: underline;
    text-decoration-thickness: 0.15em;
    text-underline-offset: 0.2em;
    background-color: transparent !important;
    /* 去掉背景 */
}