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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

/* 导航栏样式 */
.fixed-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.fixed-header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

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

.logo img {
    height: 40px;
    margin-right: 10px;
}

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

nav ul li {
    margin-left: 2rem;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #007bff;
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* 轮播图样式 */
.hero-section {
    height: 100vh;
    position: relative;
    overflow: hidden;
}

.fullscreen-carousel {
    position: relative;
    height: 100%;
}

.carousel-track {
    display: flex;
    height: 100%;
    transition: transform 0.5s ease;
}

.carousel-item {
    min-width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    position: relative;
}

.carousel-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #fff;
}

.carousel-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.carousel-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background-color: #007bff;
    color: #fff;
    text-decoration: none;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.btn:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

.carousel-controls {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 1rem;
    transform: translateY(-50%);
}

.carousel-prev,
.carousel-next {
    background-color: rgba(0, 0, 0, 0.5);
    color: #fff;
    border: none;
    padding: 1rem;
    cursor: pointer;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.carousel-prev:hover,
.carousel-next:hover {
    background-color: rgba(0, 0, 0, 0.8);
}

.carousel-dots {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
}

.dot {
    width: 10px;
    height: 10px;
    background-color: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    margin: 0 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    background-color: #fff;
    transform: scale(1.2);
}

.carousel-progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background-color: #fff;
    width: 0;
}

/* 各内容区块样式 */
section {
    padding: 4rem 0;
}

.about-content {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.about-text {
    flex: 1;
}

.about-image {
    flex: 1;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
}

.about-cards {
    display: flex;
    justify-content: space-between;
    margin: 40px 0;
}

.about-card {
    flex: 1;
    margin: 0 15px;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

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

.card-number {
    font-size: 36px;
    font-weight: bold;
    color: #007bff;
    margin-bottom: 10px;
}

.card-text {
    font-size: 18px;
    color: #333;
}

.services-cards {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    margin-top: 2rem;
}

.service-card {
    flex: 1;
    background-color: #fff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.card-icon {
    font-size: 3rem;
    color: #007bff;
    margin-bottom: 1.5rem;
}

.card-content {
    text-align: center;
}

.card-content h4 {
    margin-bottom: 0.5rem;
    color: #333;
}

.card-content p {
    color: #666;
    line-height: 1.6;
}

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

.case-card {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
}

.case-card img {
    width: 100%;
    display: block;
    transition: transform 0.3s ease;
}

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

.case-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 1rem;
    background-color: rgba(0, 0, 0, 0.7);
    color: #fff;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.case-card:hover .case-content {
    transform: translateY(0);
}

.news-list {
    margin-top: 2rem;
}

.news-item {
    background-color: #fff;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.news-date {
    color: #666;
    margin-bottom: 0.5rem;
}

.read-more {
    color: #007bff;
    text-decoration: none;
    font-weight: 500;
}

.contact-content {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.contact-info {
    flex: 1;
}

.contact-form {
    flex: 1;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
}

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

.form-message {
    margin-top: 1rem;
    padding: 0.8rem;
    border-radius: 5px;
    display: none;
}

.form-message.success {
    background-color: #d4edda;
    color: #155724;
}

.form-message.error {
    background-color: #f8d7da;
    color: #721c24;
}

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

.social-links a {
    color: #333;
    margin-right: 1rem;
    font-size: 1.2rem;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: #007bff;
}

/* 页脚样式 */
footer {
    background-color: #333;
    color: #fff;
    padding: 2rem 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
}

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

.footer-section ul li {
    margin: 0.5rem 0;
}

.footer-section ul li a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #007bff;
}

.copyright {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #444;
}

/* 动画效果 */
.animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate.active {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    nav ul {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: #fff;
        flex-direction: column;
        align-items: center;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    nav ul.active {
        max-height: 300px;
        padding: 1rem 0;
    }

    nav ul li {
        margin: 0.5rem 0;
    }

    .about-content {
        flex-direction: column;
    }

    .contact-content {
        flex-direction: column;
    }

    .carousel-content h2 {
        font-size: 2rem;
    }

    .carousel-content p {
        font-size: 1rem;
    }
}