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

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

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

.btn.primary {
    background-color: #0066cc;
    color: white;
}

.btn.primary:hover {
    background-color: #0052a3;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
}

.btn.secondary {
    background-color: transparent;
    color: #0066cc;
    border: 2px solid #0066cc;
}

.btn.secondary:hover {
    background-color: #0066cc;
    color: white;
}

/* 导航栏 */
.header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

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

.logo h1 {
    font-size: 24px;
    color: #0066cc;
    margin-bottom: 5px;
}

.logo p {
    font-size: 12px;
    color: #666;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

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

.nav a:hover,
.nav a.active {
    color: #0066cc;
}

.nav a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #0066cc;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 英雄区 */
.hero {
    margin-top: 80px;
    background: linear-gradient(135deg, #0066cc, #00a0e9);
    color: white;
    padding: 120px 0;
    text-align: center;
}

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

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* 核心业务 */
.core-business {
    padding: 100px 0;
    background-color: white;
}

.core-business h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.business-card {
    text-align: center;
    padding: 40px 30px;
    background-color: #f8f9fa;
    border-radius: 15px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.business-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.business-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #333;
}

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

/* 合作平台 */
.partners {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.partners h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    align-items: center;
}

.partner-item {
    text-align: center;
}

.partner-item img {
    width: 120px;
    height: 120px;
    object-fit: contain;
    margin-bottom: 15px;
    filter: grayscale(100%);
    transition: filter 0.3s ease;
}

.partner-item:hover img {
    filter: grayscale(0%);
}

.partner-item p {
    color: #666;
    font-weight: 500;
}

/* 案例展示 */
.cases-preview {
    padding: 100px 0;
    background-color: white;
}

.cases-preview h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.case-card {
    background-color: #f8f9fa;
    border-radius: 15px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.case-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.case-card h3 {
    padding: 20px;
    font-size: 20px;
    color: #333;
}

.case-card p {
    padding: 0 20px 20px;
    color: #666;
}

.cases-preview .btn {
    display: block;
    width: fit-content;
    margin: 0 auto;
}

/* 联系表单 */
.contact-section {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.contact-section h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info h3 {
    font-size: 24px;
    margin-bottom: 30px;
    color: #333;
}

.info-item {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    gap: 15px;
}

.info-item span {
    font-size: 24px;
    color: #0066cc;
}

.info-item p {
    color: #666;
}

.contact-form {
    background-color: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #0066cc;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* 页脚 */
.footer {
    background-color: #333;
    color: white;
    padding: 60px 0 30px;
}

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

.footer-section h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #00a0e9;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #ccc;
}

.footer-section p {
    color: #ccc;
    margin-bottom: 10px;
}

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

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

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

.footer-section ul li a:hover {
    color: #00a0e9;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #555;
    color: #999;
}

/* 页面标题 */
.page-header {
    margin-top: 80px;
    background-color: #0066cc;
    color: white;
    padding: 80px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 40px;
    font-weight: 700;
}

/* 公司介绍 */
.company-intro {
    padding: 100px 0;
    background-color: white;
}

.intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.intro-text h2 {
    font-size: 32px;
    margin-bottom: 30px;
    color: #333;
}

.intro-text p {
    font-size: 18px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 20px;
}

.intro-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 15px;
}

/* 发展历程 */
.timeline {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.timeline h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

.timeline-items {
    max-width: 800px;
    margin: 0 auto;
}

.timeline-item {
    display: flex;
    margin-bottom: 40px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 50px;
    top: 0;
    bottom: -40px;
    width: 2px;
    background-color: #0066cc;
}

.timeline-item:last-child::before {
    display: none;
}

.timeline-date {
    font-size: 24px;
    font-weight: 700;
    color: #0066cc;
    min-width: 120px;
    margin-right: 30px;
}

.timeline-content {
    flex: 1;
    background-color: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.timeline-content h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #333;
}

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

/* 企业文化 */
.culture {
    padding: 100px 0;
    background-color: white;
}

.culture h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.culture-item {
    text-align: center;
    padding: 40px 30px;
    background-color: #f8f9fa;
    border-radius: 15px;
}

.culture-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.culture-item h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #333;
}

.culture-item p {
    color: #666;
    font-size: 18px;
    line-height: 1.6;
}

/* 服务页面 */
.services {
    padding: 100px 0;
    background-color: white;
}

.service-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.service-item.reverse {
    direction: rtl;
}

.service-item.reverse .service-content {
    direction: ltr;
}

.service-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 15px;
}

.service-content h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: #333;
}

.service-content p {
    font-size: 18px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 30px;
}

.service-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 10px;
}

.feature-item span {
    font-size: 24px;
}

.feature-item p {
    margin: 0;
    font-weight: 500;
    color: #333;
}

/* 服务流程 */
.service-process {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.service-process h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.process-step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 80px;
    height: 80px;
    background-color: #0066cc;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 700;
    margin: 0 auto 30px;
}

.process-step h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #333;
}

.process-step p {
    color: #666;
    line-height: 1.6;
}

/* 案例筛选 */
.case-filter {
    padding: 40px 0;
    background-color: white;
    border-bottom: 1px solid #e0e0e0;
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 25px;
    background-color: #f8f9fa;
    border: 2px solid #e0e0e0;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
    background-color: #0066cc;
    color: white;
    border-color: #0066cc;
}

/* 案例列表 */
.cases {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.cases .case-card {
    height: 100%;
}

.case-content {
    padding: 20px;
}

.case-category {
    display: inline-block;
    background-color: #0066cc;
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 15px;
}

.case-metrics {
    display: flex;
    gap: 20px;
    margin-top: 15px;
}

.metric {
    text-align: center;
}

.metric span {
    display: block;
    font-size: 12px;
    color: #666;
    margin-bottom: 5px;
}

.metric p {
    font-size: 18px;
    font-weight: 700;
    color: #0066cc;
    margin: 0;
}

/* 联系页面 */
.contact {
    padding: 100px 0;
    background-color: white;
}

.contact h2 {
    font-size: 32px;
    margin-bottom: 30px;
    color: #333;
}

.info-section {
    margin-bottom: 30px;
}

.info-section h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #0066cc;
}

.info-section p {
    color: #666;
    line-height: 1.6;
}

/* 地图 */
.map {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.map h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

.map-container {
    height: 400px;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.map-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero h2 {
        font-size: 36px;
    }
    
    .hero p {
        font-size: 18px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .intro-content {
        grid-template-columns: 1fr;
    }
    
    .service-item {
        grid-template-columns: 1fr;
    }
    
    .service-features {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .timeline-item {
        flex-direction: column;
    }
    
    .timeline-date {
        margin-right: 0;
        margin-bottom: 15px;
    }
    
    .timeline-item::before {
        left: 0;
        top: 120px;
        bottom: -40px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 80px 0;
    }
    
    .hero h2 {
        font-size: 28px;
    }
    
    .business-grid,
    .partners-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .page-header h1 {
        font-size: 32px;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .case-metrics {
        flex-direction: column;
        align-items: center;
    }
}