/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基本样式 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

/* 导航栏样式 */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

.logo h1 {
    color: #0066cc;
    font-size: 24px;
    font-weight: 700;
}

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

.nav-menu li {
    margin-left: 30px;
}

.nav-link {
    color: #333;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #0066cc;
}

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

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: all 0.3s ease;
    background-color: #333;
}

/* 语言切换按钮样式 */
.language-switch {
    display: flex;
    gap: 10px;
    margin-right: 20px;
}

.lang-btn {
    padding: 8px 15px;
    border: 1px solid #0066cc;
    background-color: transparent;
    color: #0066cc;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    font-size: 14px;
}

.lang-btn:hover {
    background-color: #0066cc;
    color: #fff;
}

.lang-btn[active] {
    background-color: #0066cc;
    color: #fff;
}

/* 响应式语言切换 */
@media (max-width: 768px) {
    .language-switch {
        position: absolute;
        top: 20px;
        right: 80px;
        margin-right: 0;
    }
    
    .lang-btn {
        padding: 6px 12px;
        font-size: 13px;
    }
}

/* 英雄区域样式 */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('../images/hero.jpg') center/cover no-repeat;
    color: #fff;
    padding: 150px 0 100px;
    text-align: center;
}

.hero-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: #0066cc;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #0052a3;
    transform: translateY(-2px);
}

/* 章节标题样式 */
.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 36px;
    color: #333;
    margin-bottom: 15px;
    font-weight: 700;
}

.section-title p {
    font-size: 16px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* 关于我们样式 */
.about {
    padding: 100px 0;
    background-color: #fff;
}

.about-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 50px;
}

.about-text {
    flex: 1;
}

.about-text p {
    font-size: 16px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 20px;
}

.about-image {
    flex: 1;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* 服务项目样式 */
.services {
    padding: 100px 0;
    background-color: #f9f9f9;
}

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

.service-item {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.service-item:hover {
    transform: translateY(-5px);
}

.service-icon {
    width: 80px;
    height: 80px;
    background-color: #0066cc;
    color: #fff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 20px;
    font-size: 30px;
}

.service-item h3 {
    font-size: 20px;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

.service-item p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 公司优势样式 */
.advantages {
    padding: 100px 0;
    background-color: #fff;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.advantage-item {
    text-align: center;
    padding: 25px;
}

.advantage-icon {
    width: 70px;
    height: 70px;
    background-color: #f0f8ff;
    color: #0066cc;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 20px;
    font-size: 25px;
}

.advantage-item h3 {
    font-size: 18px;
    color: #333;
    margin-bottom: 10px;
    font-weight: 600;
}

.advantage-item p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 联系我们样式 */
.contact-section {
    padding: 100px 0;
    background-color: #f9f9f9;
}

.contact-info {
    display: flex;
    justify-content: space-around;
    gap: 30px;
    flex-wrap: wrap;
}

.contact-item {
    text-align: center;
    padding: 30px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    flex: 1;
    min-width: 250px;
}

.contact-item i {
    font-size: 30px;
    color: #0066cc;
    margin-bottom: 15px;
}

.contact-item h3 {
    font-size: 18px;
    color: #333;
    margin-bottom: 10px;
    font-weight: 600;
}

.contact-item p {
    font-size: 14px;
    color: #666;
}

/* 页脚样式 */
.footer {
    background-color: #333;
    color: #fff;
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-logo h3 {
    font-size: 24px;
    margin-bottom: 15px;
    font-weight: 700;
}

.footer-logo p {
    font-size: 14px;
    color: #ccc;
    line-height: 1.6;
}

.footer-links h4,
.footer-contact h4,
.footer-social h4 {
    font-size: 18px;
    margin-bottom: 20px;
    font-weight: 600;
    color: #fff;
}

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

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

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 14px;
}

.footer-links a:hover {
    color: #0066cc;
}

.footer-contact p {
    color: #ccc;
    margin-bottom: 15px;
    font-size: 14px;
    line-height: 1.6;
}

.footer-contact i {
    color: #0066cc;
    margin-right: 10px;
}

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

.social-icons a {
    display: inline-flex;
    width: 40px;
    height: 40px;
    background-color: #444;
    color: #fff;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    transition: all 0.3s ease;
    text-decoration: none;
}

.social-icons a:hover {
    background-color: #0066cc;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #444;
    color: #ccc;
    font-size: 14px;
}

/* 联系我们页面样式 */
.contact-page {
    padding: 150px 0 100px;
    background-color: #fff;
}

.contact-form {
    max-width: 800px;
    margin: 0 auto;
    background-color: #f9f9f9;
    padding: 50px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 25px;
}

.form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
}

.form-row .form-group {
    flex: 1;
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
    font-size: 14px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #0066cc;
    box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.1);
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    /* 导航栏响应式 */
    .hamburger {
        display: block;
    }

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

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

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

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        gap: 0;
        flex-direction: column;
        background-color: #fff;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 16px 0;
    }

    /* 英雄区域响应式 */
    .hero-content h2 {
        font-size: 36px;
    }

    .hero-content p {
        font-size: 18px;
    }

    /* 章节标题响应式 */
    .section-title h2 {
        font-size: 28px;
    }

    /* 关于我们响应式 */
    .about-content {
        flex-direction: column;
        gap: 30px;
    }

    /* 联系我们响应式 */
    .contact-info {
        flex-direction: column;
        align-items: center;
    }

    /* 联系表单响应式 */
    .form-row {
        flex-direction: column;
        gap: 25px;
    }

    .contact-form {
        padding: 30px;
    }
}

@media (max-width: 480px) {
    /* 英雄区域响应式 */
    .hero {
        padding: 120px 0 80px;
    }

    .hero-content h2 {
        font-size: 28px;
    }

    .hero-content p {
        font-size: 16px;
    }

    /* 章节标题响应式 */
    .section-title h2 {
        font-size: 24px;
    }

    /* 服务和优势响应式 */
    .services-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }

    /* 按钮响应式 */
    .btn {
        padding: 10px 25px;
        font-size: 14px;
    }
}

/* 滚动动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}