:root {
    --primary-color: #0066b3;
    --secondary-color: #004a8f;
    --accent-color: #00a0e9;
    --light-blue: #e6f3fc;
    --text-dark: #333;
    --text-light: #666;
    --white: #fff;
    --gray-light: #f5f5f5;
    --border-color: #ddd;
    --shadow: 0 4px 12px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* Header */
header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo img {
    height: 60px;
}

.logo-text h1 {
    font-size: 24px;
    color: var(--primary-color);
    font-weight: 700;
}

nav ul {
    display: flex;
    gap: 30px;
}

nav ul li a {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-dark);
    padding: 10px 0;
    position: relative;
    transition: var(--transition);
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

nav ul li a:hover::after,
nav ul li a.active::after {
    width: 100%;
}

nav ul li a:hover,
nav ul li a.active {
    color: var(--primary-color);
}

.language-switch {
    font-size: 14px;
}

.language-switch a {
    color: var(--text-light);
    transition: var(--transition);
}

.language-switch a.active,
.language-switch a:hover {
    color: var(--primary-color);
    font-weight: 600;
}

/* Hero Section */
.hero {
    position: relative;
    height: 500px;
    overflow: hidden;
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    z-index: 1;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(0,51,102,0.7), rgba(0,102,179,0.4));
    z-index: 2;
}

.hero .hero-content {
    position: absolute;
    top: 50%;
    left: 10%;
    transform: translateY(-50%);
    color: #fff;
    z-index: 10;
    max-width: 600px;
}

.hero-slider .slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.hero-slider .slide.active {
    opacity: 1;
}

.hero-slider .slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(0,51,102,0.7), rgba(0,102,179,0.4));
}

.hero-content {
    position: absolute;
    top: 50%;
    left: 10%;
    transform: translateY(-50%);
    color: var(--white);
    z-index: 10;
    max-width: 600px;
}

.hero-content h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    animation: slideInLeft 0.8s ease;
}

.hero-content p {
    font-size: 20px;
    opacity: 0.9;
    animation: slideInLeft 0.8s ease 0.2s both;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-nav {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 10;
}

.hero-nav span {
    width: 50px;
    height: 50px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--white);
    font-size: 18px;
}

.hero-nav span:hover {
    background: var(--primary-color);
}

/* Quick Links */
.quick-links {
    background: var(--light-blue);
    padding: 40px 0;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.link-item {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

.link-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,102,179,0.2);
}

.link-item i {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.link-item h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.link-item p {
    font-size: 14px;
    color: var(--text-light);
}

/* About Preview */
.about-preview {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 36px;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.divider {
    width: 80px;
    height: 3px;
    background: var(--primary-color);
    margin: 0 auto;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text p {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 20px;
    text-align: justify;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 5px;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn:hover {
    background: var(--secondary-color);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.stat-item {
    background: var(--light-blue);
    padding: 25px;
    border-radius: 10px;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
}

/* Departments Preview */
.departments-preview {
    padding: 80px 0;
    background: var(--gray-light);
}

.dept-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.dept-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.dept-card:hover {
    transform: translateY(-5px);
}

.dept-icon {
    width: 70px;
    height: 70px;
    background: var(--light-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.dept-icon i {
    font-size: 30px;
    color: var(--primary-color);
}

.dept-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.dept-card p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 15px;
}

.dept-card a {
    color: var(--primary-color);
    font-weight: 500;
    font-size: 14px;
}

.view-all {
    text-align: center;
    margin-top: 40px;
}

/* News Preview */
.news-preview {
    padding: 80px 0;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    padding: 25px;
    border-radius: 10px;
    transition: var(--transition);
}

.news-card:hover {
    box-shadow: var(--shadow);
}

.news-date {
    font-size: 13px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.news-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.news-card p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 15px;
}

.news-card a {
    color: var(--primary-color);
    font-weight: 500;
    font-size: 14px;
}

/* Footer */
footer {
    background: #003366;
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1.5fr;
    gap: 50px;
    margin-bottom: 40px;
}

.footer-about h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

.footer-about p {
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 20px;
}

.social-links {
    display: flex;
    gap: 15px;
}

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

.social-links a:hover {
    background: var(--primary-color);
}

.footer-links h4,
.footer-contact h4 {
    font-size: 18px;
    margin-bottom: 20px;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    font-size: 14px;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-links ul li a:hover {
    opacity: 1;
    color: var(--accent-color);
}

.footer-contact p {
    font-size: 14px;
    margin-bottom: 12px;
    opacity: 0.8;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.footer-contact i {
    color: var(--accent-color);
    margin-top: 4px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 14px;
    opacity: 0.7;
}

/* About Page */
.page-header {
    background: linear-gradient(to right, var(--secondary-color), var(--primary-color));
    padding: 60px 0;
    color: var(--white);
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    margin-bottom: 10px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
}

.about-section {
    padding: 60px 0;
}

.about-section .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-section h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.about-section p {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 15px;
    text-align: justify;
}

.about-section ul {
    margin-top: 20px;
}

.about-section ul li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
    color: var(--text-light);
}

.about-section ul li::before {
    content: '\f00c';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.honors-section {
    padding: 60px 0;
    background: var(--gray-light);
}

.honors-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.honor-item {
    background: var(--white);
    padding: 25px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
}

.honor-item i {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.honor-item h4 {
    font-size: 14px;
    color: var(--text-dark);
}

.facilities-section {
    padding: 60px 0;
}

.facilities-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.facility-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    height: 250px;
}

.facility-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.facility-item:hover img {
    transform: scale(1.1);
}

.facility-item .overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    padding: 20px;
    color: var(--white);
}

/* Departments Page */
.departments-section {
    padding: 60px 0;
}

.dept-category {
    margin-bottom: 50px;
}

.dept-category h2 {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
    display: inline-block;
}

.dept-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.dept-item {
    background: var(--white);
    border: 1px solid var(--border-color);
    padding: 25px;
    border-radius: 10px;
    transition: var(--transition);
}

.dept-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.dept-item h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.dept-item p {
    font-size: 14px;
    color: var(--text-light);
}

/* Doctors Page */
.doctors-section {
    padding: 60px 0;
}

.doctor-filters {
    margin-bottom: 40px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.filter-btn {
    padding: 10px 20px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.doctors-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.doctor-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.doctor-card:hover {
    transform: translateY(-5px);
}

.doctor-photo {
    width: 100%;
    height: 250px;
    background: var(--light-blue);
    display: flex;
    align-items: center;
    justify-content: center;
}

.doctor-photo i {
    font-size: 80px;
    color: var(--primary-color);
    opacity: 0.3;
}

.doctor-info {
    padding: 20px;
}

.doctor-info h3 {
    font-size: 18px;
    margin-bottom: 5px;
    color: var(--text-dark);
}

.doctor-title {
    font-size: 14px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.doctor-specialty {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.5;
}

/* Contact Page */
.contact-section {
    padding: 60px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.contact-info p {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 30px;
}

.contact-details {
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 20px;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: var(--light-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 20px;
}

.contact-item h4 {
    font-size: 16px;
    margin-bottom: 5px;
    color: var(--text-dark);
}

.contact-item p {
    font-size: 14px;
    color: var(--text-light);
    margin: 0;
}

.contact-form {
    background: var(--gray-light);
    padding: 40px;
    border-radius: 10px;
}

.contact-form h3 {
    font-size: 24px;
    margin-bottom: 25px;
    color: var(--text-dark);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    margin-bottom: 8px;
    color: var(--text-dark);
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 14px;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.map-section {
    padding: 0 0 60px;
}

.map-container {
    height: 400px;
    background: var(--gray-light);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.map-container i {
    font-size: 60px;
    color: var(--primary-color);
    opacity: 0.3;
}

/* Responsive */
@media (max-width: 992px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero {
        height: 400px;
    }
    
    .hero-content h2 {
        font-size: 36px;
    }
    
    .links-grid,
    .dept-grid,
    .news-grid,
    .footer-grid,
    .about-content,
    .about-section .container,
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .dept-list,
    .doctors-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .honors-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .facilities-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero {
        height: 300px;
    }
    
    .hero-content h2 {
        font-size: 28px;
    }
    
    .links-grid,
    .dept-grid,
    .news-grid,
    .about-stats,
    .dept-list,
    .doctors-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid,
    .about-content,
    .about-section .container,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .honors-grid,
    .facilities-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .page-header h1 {
        font-size: 32px;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .header-content {
        padding: 10px;
    }
    
    .logo img {
        height: 40px;
    }
    
    .logo-text h1 {
        font-size: 18px;
    }
    
    nav ul {
        gap: 15px;
    }
    
    nav ul li a {
        font-size: 14px;
    }
    
    .hero-content {
        left: 5%;
        right: 5%;
    }
    
    .hero-content h2 {
        font-size: 24px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .honors-grid,
    .facilities-grid {
        grid-template-columns: 1fr;
    }
}