/* 全局样式 */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --dark-bg: #2c3e50;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 顶部信息栏样式 */
.top-bar {
    font-size: 0.9rem;
    background-color: var(--dark-bg) !important;
}

.top-bar small {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.top-bar small:hover {
    color: var(--secondary-color);
}

.top-bar i {
    color: var(--secondary-color);
}

/* 导航栏样式 */
.navbar {
    background-color: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    transition: var(--transition);
    padding: 1rem 0;
}

.navbar-scrolled {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 0.5rem 0;
}

.navbar-brand img {
    transition: var(--transition);
    max-height: 50px;
}

.navbar-brand img:hover {
    transform: scale(1.05);
}

.nav-link {
    font-weight: 500;
    color: var(--primary-color) !important;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 1rem !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--secondary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

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

/* 轮播图样式 */
.carousel-item {
    height: 80vh;
    min-height: 500px;
}

.carousel-item img {
    object-fit: cover;
    height: 100%;
    filter: brightness(0.8);
}

.carousel-caption {
    background: rgba(0, 0, 0, 0.6);
    padding: 2rem;
    border-radius: 15px;
    max-width: 800px;
    margin: 0 auto;
    backdrop-filter: blur(5px);
}

.carousel-caption h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.carousel-caption p {
    font-size: 1.2rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

/* 卡片样式 */
.card {
    border: none;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 2rem;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.card-img-top {
    height: 250px;
    object-fit: cover;
    transition: var(--transition);
}

.card:hover .card-img-top {
    transform: scale(1.05);
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.card-text {
    color: #666;
    margin-bottom: 1.5rem;
}

.btn-primary {
    background-color: var(--secondary-color);
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 500;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* 章节标题样式 */
section {
    padding: 5rem 0;
}

section h2 {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
    text-align: center;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, var(--secondary-color), var(--accent-color));
    border-radius: 2px;
}

/* 页脚样式 */
footer {
    background-color: var(--dark-bg);
    padding: 5rem 0 2rem;
    color: white;
}

footer h5 {
    color: white;
    font-weight: 600;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 1rem;
}

footer h5::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background-color: var(--secondary-color);
}

footer a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
    margin-bottom: 0.5rem;
}

footer a:hover {
    color: var(--secondary-color);
    transform: translateX(5px);
}

.social-icons {
    margin-top: 1rem;
}

.social-icons a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    margin-right: 1rem;
    transition: var(--transition);
}

.social-icons a:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
}

/* 响应式调整 */
@media (max-width: 992px) {
    .carousel-item {
        height: 60vh;
    }
    
    .carousel-caption h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .carousel-item {
        height: 50vh;
    }
    
    .carousel-caption h1 {
        font-size: 2rem;
    }
    
    .carousel-caption {
        padding: 1.5rem;
    }
    
    section {
        padding: 3rem 0;
    }
    
    .card-img-top {
        height: 200px;
    }
}

/* 动画效果 */
[data-aos] {
    pointer-events: none;
}

[data-aos].aos-animate {
    pointer-events: auto;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* Content Styles */
.intro, .featured-courses, .faculty, .news, .about-content, .courses-content, .faculty-content, .gallery-content, .news-content, .contact-form, .login-form {
    padding: 40px 0;
}

.form-control {
    border: 1px solid #ced4da;
    border-radius: 4px;
    padding: 10px;
}

.form-control:focus {
    border-color: #007bff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}