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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

/* 导航栏样式 */
header {
    background-color: #000;
    color: #fff;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.logo h1 {
    font-size: 2rem;
    color: #00aaff;
    margin-bottom: 0.2rem;
}

.logo p {
    font-size: 0.8rem;
    color: #ccc;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 2rem;
}

.nav-links a {
    color: #fff;
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #00aaff;
}

.hamburger {
    display: none;
    cursor: pointer;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #fff;
    margin: 5px 0;
    transition: all 0.3s ease;
}

/* 首页样式 */
.hero {
    background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1507679799987-c73779587ccf?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1471&q=80');
    background-size: cover;
    background-position: center;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
    padding-top: 60px;
}

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

.hero h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #00aaff;
}

.hero h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: #ddd;
}

.btn {
    display: inline-block;
    background-color: #00aaff;
    color: #fff;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.btn:hover {
    background-color: #0088cc;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 170, 255, 0.4);
}

/* 服务介绍样式 */
.services {
    padding: 5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.services h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

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

.service-card {
    background-color: #fff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #00aaff;
}

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

/* 关于我们样式 */
.about {
    background-color: #000;
    color: #fff;
    padding: 5rem 2rem;
}

.about-content {
    max-width: 1200px;
    margin: 0 auto;
}

.about h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #00aaff;
    text-align: center;
}

.about h3 {
    font-size: 1.8rem;
    margin: 2rem 0 1rem;
    color: #00aaff;
}

.about p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
    color: #ddd;
}

/* 联系我们样式 */
.contact {
    padding: 5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.contact h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #333;
}

.contact-info {
    background-color: #fff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    display: inline-block;
}

.contact-info p {
    margin: 1rem 0;
    font-size: 1.1rem;
    color: #666;
}

/* 页脚样式 */
.footer {
    background-color: #000;
    color: #fff;
    padding: 3rem 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section {
    flex: 1;
    min-width: 250px;
}

.footer-section h5 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #00aaff;
}

.footer-section p {
    color: #ccc;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

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

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

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
    display: block;
    padding-left: 1rem;
    position: relative;
}

.footer-section ul li a::before {
    content: '→';
    position: absolute;
    left: 0;
    color: #00aaff;
    opacity: 0;
    transition: all 0.3s ease;
}

.footer-section ul li a:hover {
    color: #00aaff;
    padding-left: 1.5rem;
}

.footer-section ul li a:hover::before {
    opacity: 1;
    left: 0.5rem;
}

.footer-section i {
    color: #00aaff;
    margin-right: 0.8rem;
    font-size: 1.2rem;
}

.footer hr {
    border: none;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 2rem;
}

.footer-bottom {
    text-align: center;
    color: #999;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        right: -100%;
        top: 70px;
        flex-direction: column;
        background-color: #000;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links li {
        margin: 2.5rem 0;
    }

    .hamburger {
        display: block;
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero h2 {
        font-size: 2rem;
    }

    .hero h3 {
        font-size: 1.5rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .services h2,
    .about h2,
    .contact h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    nav {
        padding: 0 1rem;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .logo p {
        font-size: 0.7rem;
    }

    .hero h2 {
        font-size: 1.8rem;
    }

    .hero h3 {
        font-size: 1.3rem;
    }

    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }

    .services,
    .about,
    .contact {
        padding: 3rem 1rem;
    }
}