/* 重置默认样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f8f9fa;
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95); /* 半透明白色 */
  backdrop-filter: blur(15px); /* 毛玻璃效果 */
  z-index: 1000;
  padding: 1rem 0;
  box-shadow: 0 2px 20px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
}

.navbar:hover {
  background-color: rgba(255, 255, 255, 0.98);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2rem;
}

/* Logo样式 */
.nav-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  color: #007bff;
  transition: all 0.3s ease;
}

.logo-text {
  font-weight: bold;
  font-size: 1.8rem;
  letter-spacing: -0.5px;
}

.logo-subtext {
  font-size: 0.75rem;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 1px;
}

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

.nav-item {
  margin-left: 2.5rem;
}

.nav-link {
  text-decoration: none;
  color: #555;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
  padding: 0.5rem 0;
}

.nav-link:hover,
.nav-link.active {
  color: #007bff;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: #007bff;
  transition: width 0.3s ease;
}

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

/* 主视觉 Hero Section */
.hero {
  height: 100vh;
  background: linear-gradient(135deg, #007bff 0%, #0056b3 50%, #003d82 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(255,255,255,0.1) 0%, transparent 50%),
    radial-gradient(circle at 60% 70%, rgba(255,255,255,0.05) 0%, transparent 50%);
  animation: bgPulse 6s ease-in-out infinite alternate;
}

@keyframes bgPulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(1.1);
    opacity: 0.8;
  }
}

.hero-content {
  max-width: 800px;
  padding: 0 2rem;
  z-index: 1;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  font-weight: 700;
  letter-spacing: -1px;
  animation: fadeInUp 1s ease-out;
  text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.hero p {
  font-size: 1.3rem;
  margin-bottom: 2.5rem;
  animation: fadeInUp 1s ease-out 0.2s both;
  opacity: 0.95;
}

.hero-buttons {
  animation: fadeInUp 1s ease-out 0.4s both;
}

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  text-decoration: none;
  border-radius: 50px;
  margin: 0 0.75rem;
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.3);
}

.btn-primary {
  background-color: #fff;
  color: #007bff;
  border: none;
}

.btn-primary:hover {
  background-color: #f8f9fa;
}

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

.btn-secondary:hover {
  background-color: rgba(255,255,255,0.1);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 5rem 2rem;
}

.section-subtitle {
  text-align: center;
  margin-bottom: 3rem;
  font-size: 1.2rem;
  color: #666;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.services-preview {
  background-color: #fff;
  position: relative;
  overflow: hidden;
}

.services-preview::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 50%, rgba(0,123,255,0.05) 0%, transparent 70%);
  pointer-events: none;
}

.services-preview h2,
.case-preview h2,
.tech-advantages h2 {
  text-align: center;
  margin-bottom: 1rem;
  font-size: 2.8rem;
  color: #333;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
  justify-items: center;
  position: relative;
  z-index: 1;
}

.service-card {
  background: white;
  padding: 2.5rem 2rem;
  border-radius: 15px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
  text-align: center;
  transition: all 0.4s ease;
  border: 1px solid rgba(0,123,255,0.1);
}

.service-card:hover {
  transform: translateY(-15px);
  box-shadow: 0 15px 40px rgba(0,0,0,0.15);
  border-color: rgba(0,123,255,0.3);
}

.service-icon {
  width: 100px;
  height: 100px;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  margin-right: auto;
}

.service-card h3 {
  margin-bottom: 1rem;
  color: #007bff;
  font-size: 1.5rem;
  font-weight: 600;
}

.service-card p {
  color: #666;
  font-size: 1.05rem;
}

/* 案例预览 Section */
.case-preview {
  background-color: #f8f9fa;
  position: relative;
}

.case-preview::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 30% 70%, rgba(0,123,255,0.03) 0%, transparent 60%);
  pointer-events: none;
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2.5rem;
  margin-bottom: 3rem;
  position: relative;
  z-index: 1;
}

.case-card {
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
  transition: all 0.4s ease;
  background-color: #fff;
}

.case-card:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 45px rgba(0,0,0,0.15);
}

.case-card img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.case-card:hover img {
  transform: scale(1.1);
}

.case-info {
  padding: 2rem;
  background-color: #fff;
}

.case-info h3 {
  color: #333;
  margin-bottom: 1rem;
  font-size: 1.5rem;
  font-weight: 600;
}

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

/* 技术优势 Section */
.tech-advantages {
  background-color: #fff;
  position: relative;
  overflow: hidden;
}

.tech-advantages::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(circle at 80% 30%, rgba(0,123,255,0.05) 0%, transparent 60%);
  pointer-events: none;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
  position: relative;
  z-index: 1;
}

.advantage-item {
  display: flex;
  align-items: flex-start;
  padding: 2rem;
  background-color: #f8f9fa;
  border-radius: 15px;
  transition: all 0.3s ease;
  border-left: 4px solid #007bff;
}

.advantage-item:hover {
  transform: translateX(10px);
  background-color: #fff;
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}

.advantage-number {
  font-size: 3rem;
  font-weight: 700;
  color: #007bff;
  opacity: 0.3;
  margin-right: 1.5rem;
  line-height: 1;
  min-width: 60px;
}

.advantage-content h3 {
  font-size: 1.5rem;
  color: #333;
  margin-bottom: 1rem;
  font-weight: 600;
}

.advantage-content p {
  color: #666;
  font-size: 1.05rem;
  line-height: 1.7;
}

/* 服务介绍 */
.services-overview {
    padding: 6rem 0;
    background-color: #f8f9fa;
    position: relative;
    overflow: hidden;
}

.services-overview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 123, 255, 0.1), transparent);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background-color: #fff;
    border-radius: 12px;
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 123, 255, 0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #007bff, #0056b3);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
    border-color: rgba(0, 123, 255, 0.2);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    background-color: rgba(0, 123, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.service-card:hover .service-icon {
    background-color: rgba(0, 123, 255, 0.1);
    transform: scale(1.1);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.service-card p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 0;
}

/* 产品特点 */
.product-features {
    padding: 6rem 0;
    background-color: #fff;
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 2rem;
    background-color: #f8f9fa;
    border-radius: 12px;
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 123, 255, 0.05);
}

.feature-item:hover {
    background-color: rgba(0, 123, 255, 0.02);
    border-color: rgba(0, 123, 255, 0.1);
    box-shadow: 0 8px 24px rgba(0, 123, 255, 0.08);
}

.feature-icon {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    border-radius: 12px;
    background-color: rgba(0, 123, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.feature-item:hover .feature-icon {
    background-color: rgba(0, 123, 255, 0.1);
    transform: translateY(-4px);
}

.feature-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.feature-content p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 0;
}

/* 技术参数 */
.technical-specs {
    padding: 6rem 0;
    background-color: #f8f9fa;
    position: relative;
}

.specs-tabs {
    margin-top: 3rem;
    background-color: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.tab-buttons {
    display: flex;
    background-color: #f0f0f0;
    border-bottom: 1px solid #e0e0e0;
}

.tab-btn {
    flex: 1;
    padding: 1rem 2rem;
    background: none;
    border: none;
    font-size: 1.1rem;
    font-weight: 500;
    color: #666;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.tab-btn:hover {
    background-color: rgba(0, 123, 255, 0.05);
    color: #007bff;
}

.tab-btn.active {
    background-color: #fff;
    color: #007bff;
    border-bottom: 3px solid #007bff;
}

.tab-content {
    padding: 2rem;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.spec-item {
    padding: 1.5rem;
    background-color: rgba(0, 123, 255, 0.02);
    border-radius: 8px;
    border: 1px solid rgba(0, 123, 255, 0.05);
    transition: all 0.3s ease;
}

.spec-item:hover {
    background-color: rgba(0, 123, 255, 0.05);
    border-color: rgba(0, 123, 255, 0.1);
}

.spec-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: #666;
    margin-bottom: 0.5rem;
}

.spec-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
}

/* 服务流程 */
.service-process {
    padding: 6rem 0;
    background-color: #fff;
    position: relative;
}

.process-steps {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.step-item {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    position: relative;
}

.step-item::before {
    content: '';
    position: absolute;
    left: 32px;
    top: 80px;
    bottom: -2rem;
    width: 2px;
    background: linear-gradient(180deg, rgba(0, 123, 255, 0.3), rgba(0, 123, 255, 0.1));
}

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

.step-number {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: #fff;
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
    transition: all 0.3s ease;
}

.step-item:hover .step-number {
    transform: scale(1.1) rotate(10deg);
    box-shadow: 0 6px 16px rgba(0, 123, 255, 0.4);
}

.step-content {
    flex: 1;
    padding: 1.5rem;
    background-color: rgba(0, 123, 255, 0.02);
    border-radius: 12px;
    border: 1px solid rgba(0, 123, 255, 0.05);
    transition: all 0.3s ease;
}

.step-item:hover .step-content {
    background-color: rgba(0, 123, 255, 0.05);
    border-color: rgba(0, 123, 255, 0.1);
    box-shadow: 0 8px 24px rgba(0, 123, 255, 0.08);
}

.step-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.step-content p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 0;
}

/* 客户价值 */
.customer-value {
    padding: 6rem 0;
    background-color: #f8f9fa;
    position: relative;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.value-item {
    padding: 2rem;
    background-color: #fff;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 123, 255, 0.05);
    transition: all 0.3s ease;
}

.value-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
    border-color: rgba(0, 123, 255, 0.2);
}

.value-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    border-radius: 12px;
    background-color: rgba(0, 123, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.value-item:hover .value-icon {
    background-color: rgba(0, 123, 255, 0.1);
    transform: scale(1.1);
}

.value-content h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #333;
}

.value-content p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 0;
}

/* 案例分类样式 */
.case-categories {
    padding: 6rem 0;
    background: #ffffff;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.category-item {
    background: #ffffff;
    border-radius: 16px;
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 123, 255, 0.1);
}

.category-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 123, 255, 0.2);
    border-color: rgba(0, 123, 255, 0.3);
}

.category-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.1), rgba(0, 86, 179, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    transition: all 0.3s ease;
}

.category-item:hover .category-icon {
    transform: scale(1.1);
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.2), rgba(0, 86, 179, 0.2));
}

.category-item h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.category-item p {
    color: #7f8c8d;
    line-height: 1.6;
}

/* 案例展示样式 */
.case-showcase {
    padding: 6rem 0;
    background: #f8fafc;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.case-card {
    background: #ffffff;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    border: 1px solid rgba(0, 123, 255, 0.1);
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 50px rgba(0, 123, 255, 0.2);
    border-color: rgba(0, 123, 255, 0.3);
}

.case-image {
    position: relative;
    overflow: hidden;
    height: 220px;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.case-card:hover .case-image img {
    transform: scale(1.1);
}

.case-content {
    padding: 2rem;
}

.case-category {
    display: inline-block;
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: #ffffff;
    padding: 0.5rem 1.2rem;
    border-radius: 25px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.case-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #2c3e50;
    line-height: 1.4;
}

.case-content p {
    color: #7f8c8d;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.case-link {
    display: inline-flex;
    align-items: center;
    color: #007bff;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.case-link:hover {
    color: #0056b3;
}

.case-link span {
    margin-left: 0.5rem;
    transition: margin-left 0.3s ease;
}

.case-link:hover span {
    margin-left: 1rem;
}

/* 客户评价样式 */
.client-testimonials {
    padding: 6rem 0;
    background: #ffffff;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.testimonial-card {
    background: #ffffff;
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 123, 255, 0.1);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 123, 255, 0.15);
    border-color: rgba(0, 123, 255, 0.2);
}

.testimonial-content {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.testimonial-text {
    flex-grow: 1;
    margin-bottom: 2rem;
}

.testimonial-text svg {
    color: #007bff;
    margin-bottom: 1.5rem;
    opacity: 0.3;
}

.testimonial-text p {
    color: #57606f;
    line-height: 1.8;
    font-style: italic;
    font-size: 1.1rem;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.author-info h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.25rem;
}

.author-info p {
    color: #7f8c8d;
    font-size: 0.9rem;
}

/* 案例数据统计样式 */
.case-stats {
    padding: 4rem 0;
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: #ffffff;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2.5rem;
    text-align: center;
}

.stat-item {
    padding: 1.5rem;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #ffffff, rgba(255, 255, 255, 0.8));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

/* 页脚样式 */
.footer {
  background-color: #2c3e50;
  color: #ecf0f1;
  padding: 4rem 0 2rem;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 120%, rgba(0,123,255,0.1) 0%, transparent 70%);
  pointer-events: none;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
  position: relative;
  z-index: 1;
}

.footer-info .footer-logo {
  font-size: 2rem;
  font-weight: bold;
  margin-bottom: 1.5rem;
  color: #ffffff;
}

.footer-info p {
  margin-bottom: 1rem;
  color: #bdc3c7;
}

.footer-links h4,
.footer-contact h4 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: #ffffff;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-links h4::after,
.footer-contact h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: linear-gradient(135deg, #007bff, #0056b3);
}

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

.footer-links ul li {
  margin-bottom: 1rem;
}

.footer-links ul li a {
  color: #bdc3c7;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-links ul li a:hover {
  color: #007bff;
}

.footer-contact p {
  margin-bottom: 1rem;
  color: #bdc3c7;
  display: flex;
  align-items: center;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  margin-top: 2rem;
  border-top: 1px solid #34495e;
  color: #bdc3c7;
  position: relative;
  z-index: 1;
}

.footer-bottom a {
  color: #007bff;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-bottom a:hover {
  color: #ffffff;
}

/* 联系信息样式 */
.contact-info {
    padding: 6rem 0;
    background: #ffffff;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    background: #ffffff;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 123, 255, 0.1);
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 123, 255, 0.15);
    border-color: rgba(0, 123, 255, 0.2);
}

.contact-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.1), rgba(0, 86, 179, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1.5rem;
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.contact-item:hover .contact-icon {
    transform: scale(1.1);
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.2), rgba(0, 86, 179, 0.2));
}

.contact-details h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.contact-details p {
    color: #7f8c8d;
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

/* 联系表单和地图样式 */
.contact-form-section {
    padding: 6rem 0;
    background: #f8fafc;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.contact-form {
    background: #ffffff;
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 123, 255, 0.1);
}

.contact-form h2,
.contact-map h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #2c3e50;
}

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

.form-group label {
    display: block;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: #57606f;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid rgba(0, 123, 255, 0.2);
    border-radius: 12px;
    font-size: 1rem;
    color: #2c3e50;
    background: #f8fafc;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #007bff;
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

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

.contact-map {
    background: #ffffff;
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 123, 255, 0.1);
}

.map-container {
    position: relative;
    height: 400px;
    border-radius: 12px;
    overflow: hidden;
    background: rgba(0, 123, 255, 0.05);
}

.map-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: #7f8c8d;
}

.map-placeholder svg {
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* 公司时间样式 */
.company-hours {
    padding: 6rem 0;
    background: #ffffff;
}

.hours-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.hours-item {
    background: #ffffff;
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 123, 255, 0.1);
}

.hours-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 123, 255, 0.15);
    border-color: rgba(0, 123, 255, 0.2);
}

.hours-item .day {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.hours-item .time {
    font-size: 1.5rem;
    font-weight: 700;
    color: #007bff;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .contact-form, .contact-map {
        order: unset;
    }
}

@media (max-width: 768px) {
    .contact-info, .contact-form-section, .company-hours {
        padding: 4rem 0;
    }
    
    .contact-item {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-icon {
        margin-right: 0;
        margin-bottom: 1.5rem;
    }
    
    .contact-form, .contact-map {
        padding: 2rem;
    }
    
    .map-container {
        height: 300px;
    }
}

/* 关于我们页面样式 */
.about-intro {
  background-color: #fff;
  position: relative;
  overflow: hidden;
}

.about-intro::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(circle at 80% 50%, rgba(0,123,255,0.05) 0%, transparent 70%);
  pointer-events: none;
}

.intro-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  position: relative;
  z-index: 1;
}

.intro-text {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #555;
}

.intro-text p {
  margin-bottom: 1.5rem;
}

.intro-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  text-align: center;
}

.stat-item {
  background-color: #f8f9fa;
  padding: 2rem;
  border-radius: 15px;
  transition: all 0.3s ease;
  border: 1px solid rgba(0,123,255,0.1);
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0,123,255,0.15);
  border-color: rgba(0,123,255,0.3);
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  color: #007bff;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 1rem;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.vision-mission {
  background-color: #f8f9fa;
  position: relative;
}

.vision-mission::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 20% 50%, rgba(0,123,255,0.03) 0%, transparent 60%);
  pointer-events: none;
}

.vision-mission-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  position: relative;
  z-index: 1;
}

.vision-card,
.mission-card {
  background-color: #fff;
  padding: 3rem 2.5rem;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
  border: 1px solid rgba(0,123,255,0.1);
}

.vision-card:hover,
.mission-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(0,0,0,0.15);
  border-color: rgba(0,123,255,0.3);
}

.vision-icon,
.mission-icon {
  margin-bottom: 2rem;
  display: flex;
  justify-content: center;
  align-items: center;
}

.vision-card h3,
.mission-card h3 {
  font-size: 1.8rem;
  color: #333;
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.vision-card p,
.mission-card p {
  font-size: 1.1rem;
  color: #666;
  line-height: 1.8;
}

.team-section {
  background-color: #fff;
  position: relative;
}

.team-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 50%, rgba(0,123,255,0.05) 0%, transparent 70%);
  pointer-events: none;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
  position: relative;
  z-index: 1;
}

.team-card {
  background-color: #fff;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
  border: 1px solid rgba(0,123,255,0.1);
}

.team-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(0,0,0,0.15);
  border-color: rgba(0,123,255,0.3);
}

.team-photo {
  width: 100%;
  height: 280px;
  background-color: #f0f0f0;
  transition: background-color 0.3s ease;
}

.team-card:hover .team-photo {
  background-color: #e0e0e0;
}

.team-info {
  padding: 2rem;
}

.team-info h3 {
  font-size: 1.5rem;
  color: #333;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.team-title {
  color: #007bff;
  font-weight: 500;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.team-bio {
  color: #666;
  line-height: 1.7;
  font-size: 1rem;
}

.timeline-section {
  background-color: #f8f9fa;
  position: relative;
  overflow: hidden;
}

.timeline-section::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(circle at 80% 30%, rgba(0,123,255,0.03) 0%, transparent 60%);
  pointer-events: none;
}

.timeline {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 0;
  z-index: 1;
}

.timeline::after {
  content: '';
  position: absolute;
  width: 6px;
  background-color: #007bff;
  opacity: 0.3;
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -3px;
  border-radius: 3px;
}

.timeline-item {
  padding: 1rem 4rem;
  position: relative;
  background-color: inherit;
  width: 50%;
  box-sizing: border-box;
}

.timeline-item::after {
  content: '';
  position: absolute;
  width: 25px;
  height: 25px;
  right: -12px;
  background-color: white;
  border: 4px solid #007bff;
  top: 20px;
  border-radius: 50%;
  z-index: 1;
  transition: all 0.3s ease;
}

.timeline-item:hover::after {
  transform: scale(1.3);
  box-shadow: 0 0 0 8px rgba(0,123,255,0.1);
}

.timeline-item:nth-child(odd) {
  left: 0;
}

.timeline-item:nth-child(even) {
  left: 50%;
}

.timeline-item:nth-child(even)::after {
  left: -12px;
}

.timeline-content {
  padding: 2rem;
  background-color: white;
  position: relative;
  border-radius: 15px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
  border: 1px solid rgba(0,123,255,0.1);
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0,0,0,0.15);
  border-color: rgba(0,123,255,0.3);
}

.timeline-date {
  position: absolute;
  top: 20px;
  font-size: 1.2rem;
  font-weight: 700;
  color: #007bff;
  padding: 0.5rem 1rem;
  background-color: rgba(0,123,255,0.1);
  border-radius: 20px;
  border: 1px solid rgba(0,123,255,0.3);
}

.timeline-item:nth-child(odd) .timeline-date {
  right: -100px;
}

.timeline-item:nth-child(even) .timeline-date {
  left: -100px;
}

.timeline-content h3 {
  font-size: 1.5rem;
  color: #333;
  margin-bottom: 1rem;
  font-weight: 600;
}

.timeline-content p {
  font-size: 1.1rem;
  color: #666;
  line-height: 1.8;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 992px) {
  .advantages-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
}

/* 汉堡菜单样式 */
.hamburger-menu {
    display: none;
    flex-direction: column;
    cursor: pointer;
    z-index: 1001;
}

.hamburger-menu span {
    height: 3px;
    width: 25px;
    background: #3498db;
    margin: 3px 0;
    transition: 0.3s ease;
}

@media (max-width: 768px) {
    .hamburger-menu {
        display: flex;
    }
    
    .nav-menu {
        display: none;
        flex-direction: column;
        position: fixed;
        top: 0;
        right: 0;
        width: 80%;
        height: 100vh;
        background: rgba(44, 62, 80, 0.95);
        padding-top: 60px;
        z-index: 1000;
        transform: translateX(100%);
        transition: transform 0.3s ease;
    }
    
    .nav-menu.active {
        display: flex;
        transform: translateX(0);
    }
    
    .nav-item {
        margin: 15px 0;
        text-align: center;
    }
    
    .nav-link {
        font-size: 18px;
    }
    
  .hero h1 {
    font-size: 2rem;
  }

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

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

  .btn {
    display: block;
    margin: 0.5rem auto;
    width: 80%;
    max-width: 300px;
  }

  .container {
    padding: 2rem 1rem;
  }

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

@media (max-width: 576px) {
  .hero h1 {
    font-size: 2rem;
  }

  .services-preview h2,
  .case-preview h2,
  .tech-advantages h2 {
    font-size: 2rem;
  }

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

  .advantage-item {
    flex-direction: column;
  }

  .advantage-number {
    margin-right: 0;
    margin-bottom: 1rem;
    text-align: center;
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-links h4::after,
  .footer-contact h4::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .footer-links ul li a {
    padding-left: 0;
  }

  .footer-links ul li a::before {
    display: none;
  }

  .footer-contact p {
    justify-content: center;
  }
  
  .footer-contact p::before {
    display: none;
  }
}