/* 基础样式设置 */
:root {
    --primary-color: #165DFF;
    --secondary-color: #36B37E;
    --primary-light: #E8F3FF;
    --dark-color: #1D2939;
    --gray-color: #667085;
    --light-gray: #F5F7FA;
    --white-color: #FFFFFF;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #FAFAFA;
  }
  
  .container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
  }
  
  img {
    max-width: 100%;
    height: auto;
    display: block;
  }
  
  ul {
    list-style: none;
  }
  
  a {
    text-decoration: none;
    color: var(--dark-color);
    transition: var(--transition);
  }
  
  a:hover {
    color: var(--primary-color);
  }
  
  h1, h2, h3, h4 {
    margin-bottom: 1rem;
    line-height: 1.3;
  }
  
  p {
    margin-bottom: 1rem;
  }
  
  .btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: var(--white-color);
    border: none;
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
  }
  
  .btn:hover {
    background-color: #0E42D2;
    color: var(--white-color);
    transform: translateY(-2px);
  }
  
  .primary-btn {
    background-color: var(--primary-color);
  }
  
  .secondary-btn {
    background-color: var(--white-color);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
  }
  
  .secondary-btn:hover {
    background-color: var(--primary-light);
  }
  
  .section-header {
    text-align: center;
    margin-bottom: 4rem;
  }
  
  .section-title {
    font-size: 2rem;
    color: var(--dark-color);
    position: relative;
    display: inline-block;
    padding-bottom: 10px;
  }
  
  .section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--secondary-color);
  }
  
  .section-description {
    color: var(--gray-color);
    max-width: 700px;
    margin: 0 auto;
  }
  
  .text-center {
    text-align: center;
    margin-top: 2rem;
  }
  
  /* 头部导航 */
  .site-header {
    background-color: var(--white-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
  }
  
  .site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
  }
  .logo{
    display:flex;
    align-items: center;
  }
  .logo img {
    height: 50px;
  }
  .logo h2 {
    margin-bottom:0;
    margin-left:12px;
  }
  
  .main-nav ul {
    display: flex;
  }
  
  .main-nav ul li {
    margin-left: 30px;
  }
  
  .main-nav ul li a {
    font-weight: 500;
    padding: 5px 0;
    position: relative;
  }
  
  .main-nav ul li a.active {
    color: var(--primary-color);
  }
  
  .main-nav ul li a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
  }
  
  .menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-color);
    cursor: pointer;
  }
  
  /* 英雄区域 */
  .hero {
    background: linear-gradient(rgba(22, 93, 255, 0.9), rgba(22, 93, 255, 0.8)), url('../images/banner1.jpg') center/cover no-repeat;
    color: var(--white-color);
    padding: 100px 0;
    text-align: center;
    position: relative;
    display:flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height:880px;
  }
  
  .hero-content {
    position: relative;
    
    z-index: 2;
  }
  
  .hero h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
  }
  
  .hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-buttons .btn {
    margin: 0 10px;
  }
  
  /* 业务介绍 */
  .services-section {
    padding: 80px 0;
    background-color: var(--white-color);
  }
  
  .service-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 30px;
  }
  
  .service-card {
    background-color: var(--white-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
  }
  
  .service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
  }
  
  .service-card img {
    width: 90%;
    margin-left:5%;
    height: 160px;
    object-fit: cover;
  }
  
  .service-icon {
    width: 60px;
    height: 60px;
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 030px auto 20px;
    background-color: var(--white-color);
    box-shadow: var(--shadow);
    position: relative;
    z-index: 2;
  }
  
  .service-card h3 {
    text-align: center;
    margin-bottom: 15px;
    margin-top:20px;
    color: var(--dark-color);
  }
  
  .service-card p {
    padding: 0 20px 20px;
    text-align: center;
    color: var(--gray-color);
  }
  
  /* 公司优势 */
  .advantages-section {
    padding: 80px 0;
    background-color: var(--light-gray);
  }
  
  .advantage-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
  }
  
  .advantage-card {
    background-color: var(--white-color);
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
  }
  
  .advantage-card:hover {
    transform: translateY(-5px);
  }
  
  .advantage-icon {
    width: 70px;
    height: 70px;
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin: 0 auto 20px;
  }
  
  .advantage-card h3 {
    color: var(--dark-color);
    margin-bottom: 15px;
  }
  
  .advantage-card p {
    color: var(--gray-color);
  }
  
  /* 公司案例 */
  .cases-section {
    padding: 80px 0;
    background-color: var(--white-color);
  }
  
  .case-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
  }
  
  .case-card {
    background-color: var(--white-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
  }
  
  .case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
  }
  
  .case-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
  }
  
  .case-info {
    padding: 20px;
  }
  
  .case-card h3 {
    margin-bottom: 10px;
    color: var(--dark-color);
  }
  
  .case-card p {
    color: var(--gray-color);
    margin-bottom: 15px;
  }
  
  .case-link {
    display: inline-flex;
    align-items: center;
    color: var(--primary-color);
    font-weight: 500;
  }
  
  .case-link i {
    margin-left: 5px;
    transition: var(--transition);
  }
  
  .case-link:hover i {
    transform: translateX(5px);
  }
  
  /* 公司简介 */
  .about-section {
    padding: 80px 0;
    background-color: var(--light-gray);
  }
  
  .about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
  }
  
  .about-text p {
    margin-bottom: 20px;
    color: var(--gray-color);
    line-height: 1.8;
  }
  
  .about-img img {
    border-radius: 8px;
    box-shadow: var(--shadow);
  }
  
  /* 咨询区域 */
  .cta-section {
    background-color: var(--primary-color);
    color: var(--white-color);
    padding: 80px 0;
    text-align: center;
  }
  
  .cta-section h2 {
    font-size: 2rem;
    margin-bottom: 15px;
  }
  
  .cta-section p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .cta-section .btn {
    background-color: var(--white-color);
    color: var(--primary-color);
  }
  
  .cta-section .btn:hover {
    background-color: var(--light-gray);
  }
  
  /* 页脚 */
  .site-footer {
    background-color: var(--dark-color);
    color: var(--white-color);
    padding: 60px 0 20px;
  }
  
  .footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
  }
  
  .footer-logo img {
    height: 50px;
    margin-bottom: 20px;
  }
  
  .footer-column p {
    color: #B4B4B4;
    margin-bottom: 20px;
  }
  
  .footer-column h3 {
    color: var(--white-color);
    margin-bottom: 20px;
    font-size: 1.2rem;
  }
  
  .footer-column ul li {
    margin-bottom: 10px;
  }
  
  .footer-column ul li a {
    color: #B4B4B4;
  }
  
  .footer-column ul li a:hover {
    color: var(--white-color);
  }
  
  .contact-info li {
    display: flex;
    align-items: flex-start;
  }
  
  .contact-info li i {
    color: var(--secondary-color);
    margin-right: 10px;
    margin-top: 5px;
    flex-shrink: 0;
  }
  
  .footer-bottom {
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: #B4B4B4;
    font-size: 0.9rem;
  }
  
  /* 内页标题 */
  .page-title {
    background-color: var(--primary-light);
    padding: 60px 0;
    text-align: center;
  }
  
  .page-title h1 {
    font-size: 2.5rem;
    color: var(--dark-color);
    margin-bottom: 10px;
  }
  
  .page-title p {
    color: var(--gray-color);
    font-size: 1.1rem;
  }
  
  /* 关于我们页面 */
  .about-content-section {
    padding: 80px 0;
    background-color: var(--white-color);
  }
  
  .about-company {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 80px;
    align-items: center;
  }
  
  .about-image img {
    border-radius: 8px;
    box-shadow: var(--shadow);
  }
  
  .about-text h2 {
    color: var(--dark-color);
    margin-bottom: 20px;
  }
  
  .about-text p {
    color: var(--gray-color);
    margin-bottom: 20px;
    line-height: 1.8;
  }
  
  .company-values {
    margin-bottom: 80px;
  }
  
  .company-values h2 {
    text-align: center;
    margin-bottom: 40px;
    color: var(--dark-color);
  }
  
  .values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
  }
  
  .value-card {
    background-color: var(--light-gray);
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    transition: var(--transition);
  }
  
  .value-card:hover {
    transform: translateY(-5px);
    background-color: var(--white-color);
    box-shadow: var(--shadow);
  }
  
  .value-icon {
    width: 70px;
    height: 70px;
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin: 0 auto 20px;
  }
  
  .team-section {
    text-align: center;
  }
  
  .team-section h2 {
    margin-bottom: 15px;
    color: var(--dark-color);
  }
  
  .team-section p {
    color: var(--gray-color);
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
  }
  
  .team-member {
    text-align: center;
  }
  
  .team-member img {
    border-radius: 50%;
    width: 150px;
    height: 150px;
    object-fit: cover;
    margin: 0 auto 15px;
    border: 5px solid var(--light-gray);
  }
  
  .team-member h3 {
    margin-bottom: 5px;
    color: var(--dark-color);
  }
  
  .team-member p {
    color: var(--gray-color);
    margin-bottom: 0;
  }
  
  /* 服务页面 */
  .services-content-section {
    padding: 80px 0;
    background-color: var(--white-color);
  }
  
  .service-detail {
    margin-bottom: 80px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--light-gray);
  }
  
  .service-detail:last-child {
    border-bottom: none;
    margin-bottom: 40px;
  }
  
  .service-icon-large {
    width: 80px;
    height: 80px;
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 20px;
  }
  
  .service-detail h2 {
    color: var(--dark-color);
    margin-bottom: 30px;
  }
  
  .service-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
  }
  
  .service-image img {
    border-radius: 8px;
    box-shadow: var(--shadow);
  }
  
  .service-text p {
    color: var(--gray-color);
    margin-bottom: 20px;
    line-height: 1.8;
  }
  
  .service-text ul {
    margin-bottom: 20px;
  }
  
  .service-text ul li {
    color: var(--gray-color);
    margin-bottom: 10px;
    padding-left: 25px;
    position: relative;
  }
  
  .service-text ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
  }
  
  .service-cta {
    text-align: center;
    padding: 40px;
    background-color: var(--light-gray);
    border-radius: 8px;
    margin-top: 40px;
  }
  
  .service-cta h3 {
    margin-bottom: 20px;
    color: var(--dark-color);
  }
  
  /* 案例页面 */
  .cases-filter {
    background-color: var(--light-gray);
    padding: 20px 0;
  }
  
  .filter-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
  }
  
  .filter-tabs li {
    padding: 8px 15px;
    background-color: var(--white-color);
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
  }
  
  .filter-tabs li.active {
    background-color: var(--primary-color);
    color: var(--white-color);
  }
  
  .filter-tabs li:hover:not(.active) {
    background-color: var(--primary-light);
    color: var(--primary-color);
  }
  
  .cases-gallery {
    padding: 80px 0;
    background-color: var(--white-color);
  }
  
  .cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
  }
  
  .case-item {
    display: none;
  }
  
  .case-item.active {
    display: block;
    animation: fadeIn 0.5s ease;
  }
  
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  .case-category {
    display: inline-block;
    padding: 5px 10px;
    background-color: var(--primary-light);
    color: var(--primary-color);
    font-size: 0.8rem;
    border-radius: 4px;
    margin-bottom: 10px;
  }
  
  .pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
  }
  
  .page-link {
    display: inline-block;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--light-gray);
    color: var(--dark-color);
    text-align: center;
    line-height: 40px;
    font-weight: 500;
    transition: var(--transition);
  }
  
  .page-link.active {
    background-color: var(--primary-color);
    color: var(--white-color);
  }
  
  .page-link:hover:not(.active) {
    background-color: var(--primary-light);
    color: var(--primary-color);
  }
  
  .page-link.next {
    width: auto;
    padding: 0 15px;
    border-radius: 20px;
  }
  
  .case-cta {
    background-color: var(--light-gray);
    padding: 60px 0;
    text-align: center;
  }
  
  .case-cta h2 {
    color: var(--dark-color);
    margin-bottom: 15px;
  }
  
  .case-cta p {
    color: var(--gray-color);
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
  }
  
  /* 联系页面 */
  .contact-section {
    padding: 80px 0;
    background-color: var(--white-color);
  }
  
  .contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
  
  .contact-form {
    background-color: var(--light-gray);
    padding: 30px;
    border-radius: 8px;
  }
  
  .contact-form h2 {
    color: var(--dark-color);
    margin-bottom: 30px;
  }
  
  .form-group {
    margin-bottom: 20px;
  }
  
  .form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark-color);
  }
  
  .form-group input,
  .form-group select,
  .form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
  }
  
  .form-group input:focus,
  .form-group select:focus,
  .form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.1);
  }
  
  .contact-info-section h2 {
    color: var(--dark-color);
    margin-bottom: 30px;
  }
  
  .contact-details {
    margin-bottom: 40px;
  }
  
  .contact-item {
    display: flex;
    margin-bottom: 30px;
  }
  
  .contact-icon {
    width: 50px;
    height: 50px;
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-right: 20px;
    flex-shrink: 0;
  }
  
  .contact-text h3 {
    color: var(--dark-color);
    margin-bottom: 5px;
  }
  
  .contact-text p {
    color: var(--gray-color);
    margin-bottom: 0;
  }
  
  .contact-map h3 {
    color: var(--dark-color);
    margin-bottom: 15px;
  }
  
  .map-placeholder {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
  }
  
  /* 常见问题 */
  .faq-section {
    padding: 80px 0;
    background-color: var(--light-gray);
  }
  
  .faq-items {
    max-width: 800px;
    margin: 0 auto;
  }
  
  .faq-item {
    margin-bottom: 15px;
    border-radius: 8px;
    overflow: hidden;
    background-color: var(--white-color);
    box-shadow: var(--shadow);
  }
  
  .faq-question {
    width: 100%;
    padding: 20px;
    background-color: var(--white-color);
    border: none;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--dark-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .faq-question i {
    color: var(--primary-color);
    transition: var(--transition);
  }
  
  .faq-question.active i {
    transform: rotate(180deg);
  }
  
  .faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
  }
  
  .faq-answer p {
    color: var(--gray-color);
    padding: 0;
    margin: 0;
  }
  
  .faq-answer.active {
    padding: 0 20px 20px;
    max-height: 500px;
  }
  
  /* 响应式设计 */
  @media (max-width: 992px) {
    .about-content,
    .about-company,
    .service-content,
    .contact-content {
      grid-template-columns: 1fr;
    }
    
    .about-img,
    .about-image,
    .service-image {
      order: -1;
    }
  }
  
  @media (max-width: 768px) {
    .menu-toggle {
      display: block;
    }
    
    .main-nav {
      position: fixed;
      top: 0;
      right: -100%;
      width: 80%;
      height: 100vh;
      background-color: var(--white-color);
      box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
      transition: right 0.3s ease;
      z-index: 1000;
    }
    
    .main-nav.active {
      right: 0;
    }
    
    .main-nav ul {
      flex-direction: column;
      padding: 80px 30px;
    }
    
    .main-nav ul li {
      margin: 0 0 20px 0;
    }
    
    .main-nav ul li a {
      font-size: 1.2rem;
    }
    
    .hero h1 {
      font-size: 2.2rem;
    }
    
    .hero-buttons .btn {
      display: block;
      margin: 10px auto;
    }
    
    .section-title {
      font-size: 1.8rem;
    }
    
    .case-cards,
    .cases-grid {
      grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
  }
  
  @media (max-width: 576px) {
    .hero {
      padding: 80px 0;
    }
    
    .hero h1 {
      font-size: 1.8rem;
    }
    
    .hero p {
      font-size: 1rem;
    }
    
    .section-title {
      font-size: 1.5rem;
    }
    
    .service-cards,
    .advantage-cards,
    .values-grid,
    .team-grid {
      grid-template-columns: 1fr;
    }
    
    .footer-content {
      grid-template-columns: 1fr;
      text-align: center;
    }
    
    .contact-item {
      flex-direction: column;
      align-items: center;
      text-align: center;
    }
    
    .contact-icon {
      margin-right: 0;
      margin-bottom: 15px;
    }
    
    .page-title h1 {
      font-size: 2rem;
    }
  }