/* 导航容器样式 */
.BD-navbar {
    width: 100%;
    padding: 0 10%;
    background-color: #2764b3;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
}

/* 导航栏样式 */
.nav>li>a {
    padding: 15px;
    color: #fff;
    font-size: 1.5rem;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

/* 导航栏项目激活时：显示背景色*/
.nav-pills>li.active>a,
.nav-pills>li.active>a:hover,
.nav-pills>li.active>a:focus,
.nav-pills>li:hover>a {
    background-color: #337ab7;
    border-radius: 4px;
}

/* 导航栏鼠标悬停：显示二级菜单 */
.nav-pills .dropdown:hover .dropdown-menu {
    display: block;
    margin-top: 0;
}

/* 二级菜单样式 */
.nav-pills .dropdown-menu {
    min-width: 130px;
    background: #2764b3;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 9999;
    display: none;
}

.nav-pills .dropdown-menu>li>a {
    margin-top: 5px;
    font-size: 1.5rem;
    color: #fff;
}

.nav-pills .dropdown-menu>li>a:hover {
    font-size: 1.8rem;
    font-weight: 600;
    background-color: #337ab7;
}

/* 移动端垂直导航核心类 */
.BD-navbar .nav.mobile-vertical {
    display: flex;
}