/* 导航栏与下拉菜单样式 */
.navbar {
    position: fixed;
    top: 25px;
    left: 0;
    width: calc(100% - 300px);
    margin: 0 150px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background-color: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transform: translateZ(0);
    z-index: 1000;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border-radius: 10px;
    border: 1px solid #dcede2;
}

.logo {
    display: flex;
    font-family: serif;
    align-items: center;
    font-size: 1.8rem;
    font-weight: bold;
    color: #4CAF50;
    text-decoration: none;
}

.logo-img {
    width: 40px;
    height: 40px;
    margin-right: 10px;
    transition: transform 0.3s ease;
}

.logo span {
    font-family: '华文中宋', '宋体', 'Microsoft YaHei', sans-serif;
    font-size: 1.9rem;
    color: #4CAF50;
}

.logo:hover .logo-img {
    transform: rotate(10deg);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #666;
    font-size: 1rem;
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a:hover, .nav-links a.active {
    color: #4CAF50;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 3px;
    bottom: -6px;
    left: 0;
    background-color: #4CAF50;
    transition: width 0.3s ease;
}

.nav-links a:hover::after, .nav-links a.active::after {
    width: 100%;
}

/* 下拉菜单 */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    min-width: 160px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    z-index: 1;
    border-radius: 8px;
    overflow: hidden;
    transform: translateY(10px);
    opacity: 0;
    transition: all 0.3s ease;
}

.dropdown:hover .dropdown-content {
    display: block;
    transform: translateY(0);
    opacity: 1;
}

.dropdown-content a {
    color: #333;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    transition: background-color 0.3s;
}

.dropdown-content a:hover {
    background-color: #f1f1f1;
    color: #4CAF50;
}

.dropdown-content a::after {
    display: none;
}