/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 50px;
    color: #2c3e50;
    position: relative;
}

.section-title:after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: #3498db;
    margin: 15px auto 0;
}

.btn {
    display: inline-block;
    background-color: #3498db;
    color: #fff;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #2980b9;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* 头部样式 */
header {
    padding: 25px 0;
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

header.scrolled {
    padding: 15px 0;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

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

.logo h1 {
    font-size: 2.5rem;
    color: #3498db;
    font-weight: 700;
}

/* 英雄区样式 */
#hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('images/hero-bg.jpg') no-repeat center center/cover;
    display: flex;
    align-items: center;
    text-align: center;
    color: #fff;
    margin-top: 60px;
}

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

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

/* 关于我们样式 */
#about {
    background-color: #fff;
    background: url('images/about-bg.jpg') no-repeat center center/cover;
    background-attachment: fixed;
    position: relative;
}

#about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    z-index: 0;
}

#about .container {
    position: relative;
    z-index: 1;
}

.about-content {
    display: flex;
    flex-wrap: wrap;
    gap: 50px;
}

.about-text {
    flex: 1;
    min-width: 300px;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: #555;
}

.about-stats {
    flex: 1;
    min-width: 300px;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    padding: 20px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.stat-item.animate {
    opacity: 1;
    transform: translateY(0);
}

.stat-item i {
    font-size: 2.5rem;
    color: #3498db;
    margin-bottom: 15px;
}

.stat-item h3 {
    font-size: 2rem;
    color: #2c3e50;
    margin-bottom: 5px;
}

/* 服务样式 */
#services {
    background: linear-gradient(rgba(52, 152, 219, 0.05), rgba(52, 152, 219, 0.1));
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease, box-shadow 0.3s ease;
}

.service-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-card i {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #2c3e50;
}

.service-card p {
    color: #666;
}

/* 作品样式 */
#portfolio {
    background-color: #fff;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.portfolio-item {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    height: 250px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
    background-color: #f0f0f0;
}

.portfolio-item.animate {
    opacity: 1;
    transform: translateY(0);
}

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

.portfolio-overlay {
    position: absolute;
    bottom: -100%;
    left: 0;
    width: 100%;
    padding: 20px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: #fff;
    transition: bottom 0.3s ease;
}

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

.portfolio-item:hover .portfolio-overlay {
    bottom: 0;
}

.portfolio-overlay h3 {
    margin-bottom: 10px;
}

/* 联系我们样式 */
#contact {
    background-color: #f8f9fa;
    background: linear-gradient(rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.9)), url('images/contact-bg.jpg') no-repeat center center/cover;
    background-attachment: fixed;
}

.contact-content {
    display: flex;
    flex-wrap: wrap;
    gap: 50px;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.info-item {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
}

.info-item i {
    font-size: 1.5rem;
    color: #3498db;
    margin-right: 20px;
    width: 40px;
    height: 40px;
    background-color: #e8f4fc;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-form {
    flex: 2;
    min-width: 300px;
    display: flex;
    flex-direction: column;
}

.contact-form input,
.contact-form textarea {
    margin-bottom: 15px;
    padding: 15px;
    border: 1px solid #e0e0e0;
    border-radius: 5px;
    font-family: inherit;
}

.contact-form textarea {
    height: 150px;
    resize: vertical;
}

/* 页脚样式 */
footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 50px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.footer-logo h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.social-links {
    display: flex;
}

.social-links a {
    color: #fff;
    margin-left: 20px;
    font-size: 1.5rem;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: #3498db;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright p {
    margin-bottom: 8px;
}

.copyright a {
    color: #a0a0a0;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.copyright a:hover {
    color: #3498db;
    text-decoration: underline;
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media screen and (max-width: 576px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .about-content,
    .contact-content {
        flex-direction: column;
    }
}