body{
    background-color: #f3f3f3;
}

/* 新增加载动画 */
@keyframes nav-loading {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.nav-loading {
    position: relative;
    padding-left: 25px;
    opacity: 0.7;
    pointer-events: none;
}
.nav-loading::before {
    content: "➤";
    position: absolute;
    left: 0;
    animation: nav-loading 1s linear infinite;
}

/* 辅助答复下拉菜单样式 */
.navbar-nav .dropdown-menu {
    border: 1px solid #007bff;
    border-radius: 5px;
    box-shadow: 0 4px 8px rgba(0, 123, 255, 0.2);
    min-width: 150px;
}

.navbar-nav .dropdown-item {
    padding: 8px 16px;
    color: #333;
    font-weight: 500;
    transition: all 0.2s ease;
}

.navbar-nav .dropdown-item:hover {
    background-color: #007bff;
    color: white;
    text-decoration: none;
}

.navbar-nav .dropdown-toggle::after {
    margin-left: 5px;
    vertical-align: middle;
}

/* 下拉菜单激活状态 */
.navbar-nav .dropdown.show .nav-link {
    color: #007bff;
    font-weight: bold;
}