/* 导航栏样式 */
.navbar-custom {
    background-color: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 0.8rem 0;
}

.logo-img {
    width: 200px;
    height: 90px;
    object-fit: contain;
}

.brand-text {
    color: #333333;
    font-weight: 600;
    font-size: 1.2rem;
}

.navbar-text {
    color: #666666;
    font-weight: 500;
}

.navbar-nav .nav-link {
    color: #333333;
    margin-left: 1.5rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: #34A853;
}

.dropdown-menu {
    border: none;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.dropdown-item {
    border-radius: 6px;
    margin: 2px 0;
    transition: background-color 0.2s ease;
}

.dropdown-item:hover {
    background-color: #E6F4EA;
    color: #34A853;
}

/* 主区域样式 */


.hero-section {
    margin-top: 3rem;
    background-color: #FFFCFCFC;
    margin-bottom: 5rem;
}

.ai-lab-title {
    color: #34A853;
    font-size: 2.5rem;
    font-weight: 600;
}

.typing-text {
    font-size: 1.2rem;
    color: #333333;
    min-height: 2rem;
}

.join-btn {
    background-color: #34A853;
    color: #ffffff;
    padding: 0.8rem 2.5rem;
    border-radius: 30px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
}
.more-btn {
    background-color: #ffffff;
    color: #34A853;
    /* padding: 0.8rem 2.5rem; */
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}   

.join-btn:hover {
    background-color: #2A8644;
    color: #ffffff;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(52, 168, 83, 0.3);
}

/* 分部区域样式 */
.departments-section {
    background-color: #ffffff;
    margin-bottom: 3rem;
}

.section-title {
    color: #333333;
    font-weight: 600;
    position: relative;
    display: inline-block;
    padding-bottom: 0.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: #34A853;
    border-radius: 3px;
}

.department-card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    background-color: #ffffff;
}

.department-card:nth-child(1)::before {
    background-image: url('../images/llm-bg.jpg');
}

.department-card:nth-child(2)::before {
    background-image: url('../images/nn-bg.jpg');
}

.department-card:nth-child(3)::before {
    background-image: url('../images/ml-bg.jpg');
}

.department-card .card-title {
    color: #333333;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.department-card .card-text {
    color: #666666;
}

.department-card.card-hover:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* 动态和社刊区块样式 */
.features-section {
    background-color: #FCFCFC;
    margin-bottom: 3rem;
}

.feature-card {
    border-radius: 6px;
    background-color: #ffffff;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    min-height: 30px;
    margin-top: 3rem;
    margin-bottom: 0rem;
}

.feature-card:nth-child(1)::before {
    background-image: url('../images/news-bg.jpg');
}

.feature-card:nth-child(2)::before {
    background-image: url('../images/magazine-bg.jpg');
}

.feature-title {
    color: #333333;
    font-weight: 600;
    font-size: 1.5rem;
}

.feature-desc {
    color: #666666;
    font-size: 1.1rem;
}

.feature-link {
    color: #34A853;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.feature-link:hover {
    color: #2A8644;
    padding-left: 20px;
}

.feature-card.card-hover:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* 底部区域样式 */
.footer-section {
    background-color: #2D3748;
    color: #ffffff;
    margin-top: 3rem;
}

.footer-title {
    color: #ffffff;
    font-weight: 600;
    position: relative;
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
    margin-top: 5rem;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: #34A853;
    border-radius: 2px;
}

.footer-link {
    color: #CCCCCC;
    text-decoration: none;
    transition: all 0.3s ease;
    display: block;
    margin-bottom: 0.5rem;
}

.footer-link:hover {
    color: #34A853;
    padding-left: 5px;
}

.footer-list {
    list-style: none;
    padding: 0;
}

.copyright {
    color: #AAAAAA;
    font-size: 0.9rem;
    margin-top: rem;
}