/* 导航栏样式 */
.navbar {
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand {
    /* font-size: 1.5rem; */
    font-weight: bold;
    color: #333333;
}

.navbar-brand:hover {
    color: #3498db;
}

.navbar-nav .nav-link {
    color: #333333;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: #3498db;
}

.navbar-nav .nav-link.active {
    color: #3498db;
    font-weight: bold;
}

/* 其他导航栏相关样式保持不变 */
.dropdown:hover>.dropdown-menu {
    display: block;
    margin-top: 0;
}

.dropdown-menu {
    background-color: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    padding: 0;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.dropdown-menu.show {
    display: block;
}

.dropdown-item {
    color: #333333;
    padding: 0.6rem 1.5rem;
    transition: all 0.3s ease;
}

.dropdown-item:hover {
    background-color: #f8f9fa;
    color: #3498db;
}

/* 三级导航菜单 */
.dropdown-submenu {
    position: relative;
}

.dropdown-submenu>.dropdown-menu {
    top: 0;
    left: 100%;
    margin-top: -1px;
    display: none;
}

.dropdown-submenu:hover>.dropdown-menu {
    display: block;
}

/* 响应式样式 */
@media (max-width: 991px) {
    .dropdown-submenu>.dropdown-menu {
        left: 0;
        top: 100%;
    }

    .navbar-collapse {
        background-color: #ffffff;
    }
}

/* 其他通用样式 */
body {
    font-family: 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
}

section {
    padding: 4rem 0;
}

.card {
    border: none;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.btn-primary {
    background-color: #3498db;
    border-color: #3498db;
}

.btn-primary:hover {
    background-color: #2980b9;
    border-color: #2980b9;
}

footer {
    background-color: #2c3e50;
    color: #ecf0f1;
}

footer a {
    color: #ecf0f1;
    transition: color 0.3s ease;
}

footer a:hover {
    color: #3498db;
    text-decoration: none;
}

.mr-2 {
    margin-right: 0.5rem;
    color: #eee;
}

.pl-2 {
    padding-left: 2rem;
}

.mb-10 {
    margin-bottom: 1rem;
}

ul,
li {
    margin: 0;
    padding: 0;
    list-style: none;
}



.my-nav {
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.my-nav h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #333;
}

.my-nav ul {
    padding-left: 0;
}

.my-nav li {
    margin-bottom: 10px;
}

.my-nav a {
    display: block;
    padding: 10px 15px;
    color: #666;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.my-nav a:hover,
.my-nav a.active {
    background-color: #007bff;
    color: white;
    transform: translateX(5px);
}


.my-header {
    background: linear-gradient(135deg, #1a5276 0%, #3498db 100%);
    color: white;
    padding: 80px 0;
    /* margin-bottom: 40px; */
    text-align: center;
}

.my-header h1 {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 20px;
}

.my-header p {
    font-size: 18px;
    /* max-width: 800px; */
    margin: 0 auto;
    color: white;
}

.my-section-title {
    font-size: 28px;
    font-weight: bold;
    color: #1a5276;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 3px solid #3498db;
}

a {
    text-decoration: none;
    /* 去掉下划线 */
    color: inherit;
    /* 继承父元素颜色 */
}

.ti2 {
    text-indent: 2em;
}