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

/* 基础样式 */
body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h2 {
    color: #2563eb;
    font-size: 24px;
    font-weight: 700;
}

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

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

.nav-link:hover,
.nav-link.active {
    color: #2563eb;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2563eb;
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

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

/* 英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    z-index: 2;
    position: relative;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
    max-width: 600px;
}

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

.btn {
    display: inline-block;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 16px;
}

.btn-primary {
    background: #fff;
    color: #2563eb;
    border-color: #fff;
}

.btn-primary:hover {
    background: transparent;
    color: #fff;
    border-color: #fff;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border-color: #fff;
}

.btn-secondary:hover {
    background: #fff;
    color: #2563eb;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: #2563eb;
    border-color: #2563eb;
}

.btn-outline:hover {
    background: #2563eb;
    color: #fff;
    transform: translateY(-2px);
}

/* 英雄区域动画 */
.hero-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.floating-elements {
    position: relative;
    width: 100%;
    height: 100%;
}

.element {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 6s ease-in-out infinite;
}

.element-1 {
    width: 80px;
    height: 80px;
    top: 20%;
    right: 10%;
    animation-delay: 0s;
}

.element-2 {
    width: 120px;
    height: 120px;
    top: 60%;
    right: 20%;
    animation-delay: 2s;
}

.element-3 {
    width: 60px;
    height: 60px;
    top: 40%;
    right: 5%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

/* 通用区域样式 */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 15px;
}

.section-header p {
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* 关于我们预览 */
.about-preview {
    background: #f8fafc;
}

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

.about-text h3 {
    font-size: 1.8rem;
    color: #333;
    margin-bottom: 20px;
}

.about-text p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 30px;
    line-height: 1.8;
}

.stats {
    display: flex;
    gap: 40px;
}

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

.stat-item h4 {
    font-size: 2.5rem;
    color: #2563eb;
    font-weight: 700;
    margin-bottom: 5px;
}

.stat-item p {
    color: #666;
    font-size: 0.9rem;
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-placeholder {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 4rem;
}

/* 服务区域 */
.services {
    background: #fff;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.service-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #f0f0f0;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 2rem;
}

.service-card h3 {
    font-size: 1.5rem;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

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

/* 技术优势 */
.advantages {
    background: #f8fafc;
}

.advantages-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 40px;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 30px;
    padding: 30px;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
}

.advantage-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.advantage-text h3 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 10px;
    font-weight: 600;
}

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

/* 客户案例 */
.case-studies {
    background: #fff;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.case-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.case-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.case-content {
    padding: 30px;
}

.case-content h3 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

.case-content p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.case-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tag {
    background: #e0e7ff;
    color: #2563eb;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* 新闻资讯预览 */
.news-preview {
    background: #f8fafc;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.news-card {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    display: flex;
    gap: 20px;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
}

.news-date {
    text-align: center;
    flex-shrink: 0;
}

.news-date .day {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #2563eb;
    line-height: 1;
}

.news-date .month {
    display: block;
    font-size: 0.9rem;
    color: #666;
    text-transform: uppercase;
}

.news-content h3 {
    font-size: 1.2rem;
    color: #333;
    margin-bottom: 10px;
    font-weight: 600;
    line-height: 1.4;
}

.news-content p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.read-more {
    color: #2563eb;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
}

.read-more:hover {
    text-decoration: underline;
}

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

/* 联系我们预览 */
.contact-preview {
    background: #fff;
}

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

.contact-info h2 {
    font-size: 2rem;
    color: #333;
    margin-bottom: 20px;
    font-weight: 700;
}

.contact-info p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-item h4 {
    color: #333;
    margin-bottom: 5px;
    font-weight: 600;
}

.contact-item p {
    color: #666;
    margin: 0;
}

.contact-form {
    background: #f8fafc;
    padding: 40px;
    border-radius: 15px;
}

.contact-form h3 {
    font-size: 1.5rem;
    color: #333;
    margin-bottom: 30px;
    font-weight: 600;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* 页脚 */
.footer {
    background: #1a202c;
    color: #fff;
    padding: 60px 0 20px;
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    color: #fff;
}

.footer-section h3 {
    font-size: 1.5rem;
    color: #2563eb;
}

.footer-section p {
    color: #a0aec0;
    line-height: 1.6;
    margin-bottom: 20px;
}

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

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

.footer-section ul li a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #2563eb;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: #2d3748;
    color: #a0aec0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #2563eb;
    color: #fff;
    transform: translateY(-2px);
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    color: #a0aec0;
}

.contact-info i {
    color: #2563eb;
    width: 16px;
}

.footer-bottom {
    border-top: 1px solid #2d3748;
    padding-top: 20px;
    text-align: center;
    color: #a0aec0;
}

/* 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: #fff;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }

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

    .nav-menu li {
        margin: 15px 0;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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

    .hero-buttons {
        flex-direction: column;
        align-items: flex-start;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .stats {
        justify-content: center;
        gap: 20px;
    }

    .services-grid,
    .cases-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }

    .advantages-content {
        grid-template-columns: 1fr;
    }

    .advantage-item {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }

    .news-card {
        flex-direction: column;
        text-align: center;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .contact-form {
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .btn {
        padding: 12px 25px;
        font-size: 14px;
    }

    .service-card,
    .case-card,
    .news-card {
        padding: 20px;
    }

    .contact-form {
        padding: 20px 15px;
    }
}

/* 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;
}

/* 页面标题 */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 15px;
}

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

/* 公司简介 */
.company-intro {
    padding: 80px 0;
    background: #fff;
}

.intro-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
}

.intro-text h2 {
    font-size: 2.2rem;
    color: #333;
    margin-bottom: 25px;
    font-weight: 700;
}

.intro-text p {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

/* 发展历程 */
.timeline {
    background: #f8fafc;
    padding: 80px 0;
}

.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: #2563eb;
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
    display: flex;
    align-items: center;
}

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

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

.timeline-year {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    position: relative;
    z-index: 2;
    flex-shrink: 0;
}

.timeline-content {
    background: #fff;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    margin: 0 30px;
    flex: 1;
    max-width: 300px;
}

.timeline-content h3 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 10px;
    font-weight: 600;
}

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

/* 企业文化 */
.company-culture {
    padding: 80px 0;
    background: #fff;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.culture-item {
    text-align: center;
    padding: 40px 20px;
    background: #f8fafc;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.culture-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.culture-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 2rem;
}

.culture-item h3 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

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

/* 团队介绍 */
.team {
    background: #f8fafc;
    padding: 80px 0;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.team-member {
    background: #fff;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.team-member:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
}

.member-avatar {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 2.5rem;
}

.team-member h3 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 5px;
    font-weight: 600;
}

.member-title {
    color: #2563eb;
    font-weight: 600;
    margin-bottom: 15px;
}

.member-desc {
    color: #666;
    line-height: 1.6;
    font-size: 0.9rem;
}

/* 资质荣誉 */
.certifications {
    padding: 80px 0;
    background: #fff;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.cert-item {
    background: #f8fafc;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.cert-item:hover {
    transform: translateY(-5px);
    border-color: #2563eb;
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.1);
}

.cert-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 2rem;
}

.cert-item h3 {
    font-size: 1.2rem;
    color: #333;
    margin-bottom: 10px;
    font-weight: 600;
}

.cert-item p {
    color: #666;
    font-size: 0.9rem;
}

/* 联系我们CTA */
.contact-cta {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* 服务概览 */
.services-overview {
    padding: 80px 0;
    background: #f8fafc;
}

.service-features {
    list-style: none;
    margin: 20px 0;
    padding: 0;
}

.service-features li {
    padding: 8px 0;
    color: #666;
    position: relative;
    padding-left: 20px;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #2563eb;
    font-weight: bold;
}

/* 服务详情 */
.service-detail {
    padding: 80px 0;
    background: #fff;
}

.service-detail.alt {
    background: #f8fafc;
}

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

.detail-text h2 {
    font-size: 2.2rem;
    color: #333;
    margin-bottom: 25px;
    font-weight: 700;
}

.detail-text p {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.detail-features {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.feature-item i {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.feature-item h4 {
    color: #333;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 1.1rem;
}

.feature-item p {
    color: #666;
    line-height: 1.6;
    margin: 0;
    font-size: 0.95rem;
}

/* 服务流程 */
.service-process {
    padding: 80px 0;
    background: #fff;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

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

.step-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 25px;
    position: relative;
    z-index: 2;
}

.process-step::after {
    content: '';
    position: absolute;
    top: 40px;
    left: 50%;
    width: 100%;
    height: 2px;
    background: #e0e7ff;
    z-index: 1;
}

.process-step:last-child::after {
    display: none;
}

.step-content h3 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

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

/* 技术优势 */
.tech-advantages {
    background: #f8fafc;
    padding: 80px 0;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.advantage-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 2rem;
}

.advantage-card h3 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

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

/* 响应式设计 - 关于我们页面 */
@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2.5rem;
    }
    
    .intro-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .timeline-container::before {
        left: 30px;
    }
    
    .timeline-item {
        flex-direction: row !important;
        padding-left: 60px;
    }
    
    .timeline-year {
        position: absolute;
        left: 0;
        width: 60px;
        height: 60px;
        font-size: 1rem;
    }
    
    .timeline-content {
        margin: 0;
        max-width: none;
    }
    
    .culture-grid,
    .team-grid,
    .cert-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    /* 产品服务页面响应式 */
    .detail-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .process-step::after {
        display: none;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
}

/* 新闻分类 */
.news-categories {
    padding: 40px 0;
    background: #f8fafc;
    border-bottom: 1px solid #e2e8f0;
}

.category-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    background: #fff;
    border: 2px solid #e2e8f0;
    border-radius: 25px;
    color: #666;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover,
.tab-btn.active {
    background: #2563eb;
    border-color: #2563eb;
    color: #fff;
}

/* 热门新闻 */
.featured-news {
    padding: 80px 0;
    background: #fff;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 40px;
}

.featured-article {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    display: flex;
}

.featured-article:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.article-image {
    width: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
    flex-shrink: 0;
}

.article-content {
    padding: 30px;
    flex: 1;
}

.article-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    align-items: center;
}

.article-meta .category {
    background: #e0e7ff;
    color: #2563eb;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.article-meta .date {
    color: #666;
    font-size: 0.9rem;
}

.article-content h3 {
    font-size: 1.4rem;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
    line-height: 1.4;
}

.article-content p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.read-more {
    color: #2563eb;
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.read-more:hover {
    gap: 12px;
}

/* 新闻列表 */
.news-list {
    padding: 80px 0;
    background: #f8fafc;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.news-item {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    display: flex;
    gap: 20px;
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
}

.news-date {
    text-align: center;
    flex-shrink: 0;
    width: 80px;
}

.news-date .day {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #2563eb;
    line-height: 1;
}

.news-date .month {
    display: block;
    font-size: 0.9rem;
    color: #666;
    text-transform: uppercase;
}

.news-content {
    flex: 1;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.news-meta .category {
    background: #e0e7ff;
    color: #2563eb;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.news-meta .views {
    color: #666;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.news-content h3 {
    font-size: 1.2rem;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
    line-height: 1.4;
}

.news-content p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.news-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.news-tags .tag {
    background: #f1f5f9;
    color: #475569;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-top: 40px;
}

.page-btn {
    padding: 12px 20px;
    background: #fff;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    color: #666;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.page-btn:hover:not(:disabled) {
    background: #2563eb;
    border-color: #2563eb;
    color: #fff;
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-numbers {
    display: flex;
    gap: 10px;
    align-items: center;
}

.page-number {
    width: 40px;
    height: 40px;
    background: #fff;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    color: #666;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-number:hover,
.page-number.active {
    background: #2563eb;
    border-color: #2563eb;
    color: #fff;
}

.page-ellipsis {
    color: #666;
    font-weight: 500;
}

/* 订阅资讯 */
.newsletter {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 0;
}

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

.newsletter-text h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.newsletter-text p {
    font-size: 1.1rem;
    opacity: 0.9;
    line-height: 1.6;
}

.newsletter-form form {
    display: flex;
    gap: 15px;
}

.newsletter-form input {
    flex: 1;
    padding: 15px 20px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    outline: none;
}

.newsletter-form button {
    padding: 15px 30px;
    background: #fff;
    color: #2563eb;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.newsletter-form button:hover {
    background: #f8fafc;
    transform: translateY(-2px);
}

/* 响应式设计 - 新闻页面 */
@media (max-width: 768px) {
    .category-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .featured-grid {
        grid-template-columns: 1fr;
    }
    
    .featured-article {
        flex-direction: column;
    }
    
    .article-image {
        width: 100%;
        height: 200px;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .news-item {
        flex-direction: column;
        text-align: center;
    }
    
    .news-date {
        width: auto;
        margin-bottom: 20px;
    }
    
    .news-meta {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
    
    .pagination {
        flex-direction: column;
        gap: 15px;
    }
    
    .page-numbers {
        order: -1;
    }
    
    .newsletter-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .newsletter-form form {
        flex-direction: column;
    }
}

/* 联系信息 */
.contact-info {
    /* padding: 80px 0; */
    /* background: #f8fafc; */
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.contact-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
}

.contact-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 2rem;
}

.contact-card h3 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

.contact-card p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 8px;
}

.contact-btn {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 25px;
    background: #2563eb;
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.contact-btn:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
}

/* 联系表单 */
.contact-form-section {
    padding: 80px 0;
    background: #fff;
}

.form-container {
    max-width: 800px;
    margin: 0 auto;
}

.form-header {
    text-align: center;
    margin-bottom: 50px;
}

.form-header h2 {
    font-size: 2.2rem;
    color: #333;
    margin-bottom: 15px;
    font-weight: 700;
}

.form-header p {
    color: #666;
    font-size: 1.1rem;
}

.contact-form {
    background: #f8fafc;
    padding: 50px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 30px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.checkbox-group {
    margin-bottom: 40px;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    font-size: 0.9rem;
    line-height: 1.5;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.privacy-link {
    color: #2563eb;
    text-decoration: none;
}

.privacy-link:hover {
    text-decoration: underline;
}

.submit-btn {
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* 地图位置 */
.map-section {
    padding: 80px 0;
    background: #f8fafc;
}

.map-container {
    max-width: 1000px;
    margin: 0 auto;
}

.map-placeholder {
    background: #fff;
    padding: 60px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.map-placeholder i {
    font-size: 4rem;
    color: #2563eb;
    margin-bottom: 30px;
}

.map-placeholder h3 {
    font-size: 1.8rem;
    color: #333;
    margin-bottom: 10px;
    font-weight: 600;
}

.map-placeholder p {
    color: #666;
    font-size: 1.1rem;
    margin-bottom: 40px;
}

.map-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: #f8fafc;
    border-radius: 10px;
}

.info-item i {
    color: #2563eb;
    font-size: 1.5rem;
    width: 30px;
    text-align: center;
}

.info-item span {
    color: #666;
    font-weight: 500;
}

/* 常见问题 */
.faq-section {
    padding: 80px 0;
    background: #fff;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: #f8fafc;
    border-radius: 15px;
    margin-bottom: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.faq-question {
    padding: 25px 30px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background: #e0e7ff;
}

.faq-question h3 {
    font-size: 1.2rem;
    color: #333;
    font-weight: 600;
    margin: 0;
}

.faq-question i {
    color: #2563eb;
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 30px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 30px 25px;
    max-height: 200px;
}

.faq-answer p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* 响应式设计 - 联系我们页面 */
@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .contact-form {
        padding: 30px 20px;
    }
    
    .map-placeholder {
        padding: 40px 20px;
    }
    
    .map-info {
        grid-template-columns: 1fr;
    }
    
    .faq-question {
        padding: 20px;
    }
    
    .faq-answer {
        padding: 0 20px;
    }
    
    .faq-item.active .faq-answer {
        padding: 0 20px 20px;
    }
}

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

/* 加载动画 */
.loading {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.loading.loaded {
    opacity: 1;
    transform: translateY(0);
}