/* 统一导航栏样式 */
.navbar {
    background: #2b6cb0;
    color: #fff;
    padding: 16px 0;
}

.navbar ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 0;
    padding: 0;
    flex-wrap: wrap;
}

.navbar li {
    position: relative;
}

.dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    min-width: 200px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 9999;
    border: 1px solid #e2e8f0;
    padding: 8px 0;
}

.navbar li:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown a {
    color: #333 !important;
    padding: 12px 16px;
    display: block;
    border-bottom: 1px solid #f0f0f0;
    font-size: 0.9rem;
    text-decoration: none;
    white-space: nowrap;
    background: #fff;
    transition: all 0.2s ease;
}

.dropdown a:hover {
    background: #2b6cb0 !important;
    color: #fff !important;
    font-weight: 600;
}

.dropdown a:last-child {
    border-bottom: none;
}

.dropdown li {
    margin: 0;
    list-style: none;
    background: #fff;
}

.navbar a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
}

.navbar a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .navbar ul {
        flex-direction: column;
        gap: 0;
    }

    .dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: #f8f9fa;
        margin-left: 20px;
    }
}