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

/* 基础样式 */
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

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

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand h2 {
    color: #1976d2;
    font-weight: 700;
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

.nav-link:hover,
.nav-link.active {
    color: #1976d2;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #1976d2;
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 主要内容区域 */
main {
    margin-top: 80px;
}

/* 首页轮播区 */
.hero {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    padding: 150px 0;
    min-height: 600px;
    display: flex;
    align-items: center;
    text-align: center;
}

.hero .container {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    flex-direction: column;
    text-align: right;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    color: #1976d2;
    margin-bottom: 2rem;
    line-height: 1.2;
    max-width: 800px;
    margin-left: auto;
    margin-right: 0;
    text-align: right;
}

.hero-content p {
    font-size: 1.3rem;
    color: #555;
    margin-bottom: 3rem;
    line-height: 1.8;
    max-width: 900px;
    margin-left: auto;
    margin-right: 0;
    text-align: right;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: #1976d2;
    color: white;
    border-color: #1976d2;
}

.btn-primary:hover {
    background: #1565c0;
    border-color: #1565c0;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(25, 118, 210, 0.3);
}

.btn-outline {
    background: transparent;
    color: #1976d2;
    border-color: #1976d2;
}

.btn-outline:hover {
    background: #1976d2;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(25, 118, 210, 0.3);
}

/* 页面标题 */
.page-header {
    background: linear-gradient(135deg, #1976d2 0%, #1565c0 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 服务特色 */
.services {
    padding: 100px 0;
    background: #f8f9fa;
}

.services h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #1976d2;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 3rem;
}

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

.service-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.service-icon {
    margin-bottom: 1.5rem;
}

.service-card h3 {
    color: #1976d2;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

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

/* 公司优势 */
.advantages {
    padding: 100px 0;
}

.advantages-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.advantages h2 {
    font-size: 2.5rem;
    color: #1976d2;
    margin-bottom: 2rem;
}

.advantage-item {
    margin-bottom: 2rem;
}

.advantage-item h4 {
    color: #1976d2;
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.advantage-item p {
    color: #666;
    line-height: 1.6;
}

/* 公司介绍 */
.company-intro {
    padding: 80px 0;
}

.intro-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.intro-text h2 {
    font-size: 2.5rem;
    color: #1976d2;
    margin-bottom: 1rem;
}

.intro-subtitle {
    font-size: 1.3rem;
    color: #666;
    margin-bottom: 2rem;
    font-weight: 500;
}

.intro-text p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.company-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

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

.stat-item h3 {
    font-size: 2.5rem;
    color: #1976d2;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

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

/* 企业文化 */
.culture {
    padding: 100px 0;
    background: #f8f9fa;
}

.culture h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #1976d2;
    margin-bottom: 3rem;
}

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

.culture-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.culture-icon {
    margin-bottom: 1.5rem;
}

.culture-card h3 {
    color: #1976d2;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* 发展历程 */
.timeline {
    padding: 100px 0;
}

.timeline h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #1976d2;
    margin-bottom: 3rem;
}

.timeline-container {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-container::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #1976d2;
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-date {
    background: #1976d2;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 700;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    width: 45%;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: auto;
    margin-left: 0;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: auto;
    margin-right: 0;
}

.timeline-content h3 {
    color: #1976d2;
    margin-bottom: 0.5rem;
}

/* 团队介绍 */
.team {
    padding: 100px 0;
    background: #f8f9fa;
}

.team h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #1976d2;
    margin-bottom: 1rem;
}

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

.team-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.team-avatar {
    margin-bottom: 1rem;
}

.team-card h3 {
    color: #1976d2;
    margin-bottom: 0.5rem;
}

.team-card p:first-of-type {
    color: #666;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: #f8f9fa;
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #1976d2;
    margin-bottom: 1rem;
}

.contact-form-wrapper {
    display: flex;
    justify-content: center;
    margin-top: 3rem;
}

/* 联系表单 */
.contact-form {
    background: white;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    max-width: 500px;
    width: 100%;
}

.contact-form h3 {
    color: #1976d2;
    margin-bottom: 1rem;
    text-align: center;
    font-size: 1.8rem;
}

.contact-form p {
    text-align: center;
    color: #666;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #1976d2;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* 页脚 */
.footer {
    background: #1976d2;
    color: white;
    padding: 60px 0 20px;
}

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

.footer-section h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

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

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

.footer-section ul li {
    margin-bottom: 0.5rem;
    color: #e3f2fd;
}

.footer-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.footer-links a {
    color: #bbdefb;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #1565c0;
    padding-top: 2rem;
    text-align: center;
    color: #bbdefb;
}

.footer-bottom a {
    color: #e3f2fd;
    text-decoration: none;
}

.footer-bottom a:hover {
    color: white;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .advantages-content,
    .intro-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .contact-form-wrapper {
        padding: 0 1rem;
    }
    
    .company-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .timeline-container::before {
        left: 20px;
    }
    
    .timeline-item {
        flex-direction: column !important;
        align-items: flex-start;
        padding-left: 50px;
    }
    
    .timeline-date {
        position: absolute;
        left: 0;
        transform: none;
    }
    
    .timeline-content {
        width: 100%;
        margin: 0 !important;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .services h2,
    .culture h2,
    .timeline h2 {
        font-size: 2rem;
    }
    
    .company-stats {
        grid-template-columns: 1fr;
    }
}

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

.service-card,
.culture-card,
.team-card,
.contact-item {
    animation: fadeInUp 0.6s ease forwards;
}

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

/* 加载动画 */
.hero-image svg,
.advantages-image svg,
.intro-image svg {
    animation: fadeInUp 1s ease 0.3s both;
}