/* 自定义样式 */

/* 导航栏滚动样式 */
#main_nav.scrolled .nav-item .nav-link {
    color: #000 !important;
}

#main_nav.scrolled .nav-item .nav-link:hover {
    color: #fff !important;
}

/* 导航栏选中状态样式 */
#main_nav .nav-item .nav-link.active {
    background-color: #6266ea;
    color: #fff !important;
    font-weight: bold;
}

#main_nav.scrolled .nav-item .nav-link.active {
    background-color: #6266ea;
    color: #fff !important;
    font-weight: bold;
}

#main_nav.scrolled .nav-item .nav-link.active:hover {
    background-color: #6266ea;
    color: #fff !important;
}

/* 返回顶部按钮样式 */
#back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: rgba(13, 110, 253, 0.8);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    display: none;
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

#back-to-top:hover {
    background-color: rgba(13, 110, 253, 1);
    transform: translateY(-3px);
}