:root {
    --primary-color: #e74c3c;
    --secondary-color: #2c3e50;
    --accent-color: #f39c12;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --text-color: #333;
    --text-light: #7f8c8d;
}

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

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f9f9f9;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

a:hover {
    color: var(--accent-color);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, var(--secondary-color), var(--dark-color));
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: white;
}

.logo span {
    color: var(--primary-color);
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 1.5rem;
}

nav ul li a {
    color: white;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

nav ul li a:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('./bg.jpg') no-repeat center center/cover;
    color: white;
    display: flex;
    align-items: center;
    text-align: center;
    padding-top: 80px;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero h1 span {
    color: var(--primary-color);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    margin: 0.5rem;
}

.btn:hover {
    background-color: var(--accent-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid white;
}

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

/* Features Section */
.section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.section-title p {
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.feature-img {
    height: 200px;
    overflow: hidden;
}

.feature-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.feature-card:hover .feature-img img {
    transform: scale(1.1);
}

.feature-content {
    padding: 1.5rem;
}

.feature-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.feature-content p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

/* Experience Section */
.experience {
    background: linear-gradient(135deg, var(--secondary-color), var(--dark-color));
    color: white;
    text-align: center;
}

.experience .section-title h2,
.experience .section-title p {
    color: white;
}

.experience-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    padding: 2rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-text {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Gallery Section */
.gallery {
    background-color: var(--light-color);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    height: 250px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: white;
    padding: 1rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

/* Testimonials */
.testimonials {
    background-color: white;
}

.testimonial-slider {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.testimonial {
    background-color: var(--light-color);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin: 0 1rem;
}

.testimonial-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 1rem;
    border: 3px solid var(--primary-color);
}

.testimonial-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.testimonial-author {
    font-weight: 700;
    color: var(--secondary-color);
}

/* CTA Section */
.cta {
    background: linear-gradient(rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.8)), url('https://images.unsplash.com/photo-1517245386807-bb43f82c33c4?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80') no-repeat center center/cover;
    color: white;
    text-align: center;
    padding: 5rem 0;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.cta p {
    max-width: 700px;
    margin: 0 auto 2rem;
    opacity: 0.9;
}

/* Footer */
footer {
    background-color: var(--secondary-color);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-column h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-column h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary-color);
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 0.8rem;
}

.footer-column ul li a {
    color: #bdc3c7;
    transition: color 0.3s ease;
}

.footer-column ul li a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: all 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #bdc3c7;
    font-size: 0.9rem;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: 0 1rem;
    }
    
    nav {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 80%;
        height: calc(100vh - 80px);
        background-color: var(--secondary-color);
        transition: left 0.3s ease;
        z-index: 999;
    }
    
    nav.active {
        left: 0;
    }
    
    nav ul {
        flex-direction: column;
        padding: 2rem;
    }
    
    nav ul li {
        margin: 1rem 0;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .section {
        padding: 3rem 0;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .stat-text {
        font-size: 1rem;
    }
    
    .cta h2 {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .logo {
        font-size: 1.5rem;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .section-title h2 {
        font-size: 1.8rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .experience-stats {
        grid-template-columns: 1fr;
    }
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 1s ease forwards;
}

.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

.delay-3 {
    animation-delay: 0.6s;
}