/* 全局样式 */
:root {
  --primary-color: #007bff;
  --primary-dark: #0056b3;
  --secondary-color: #6c757d;
  --success-color: #28a745;
  --info-color: #17a2b8;
  --warning-color: #ffc107;
  --danger-color: #dc3545;
  --light-color: #f8f9fa;
  --dark-color: #343a40;
  --white-color: #ffffff;
  --gray-color: #6c757d;
  --gray-light: #e9ecef;
  --gray-dark: #343a40;
  --border-color: #dee2e6;
  --background-color: #f8f9fa;
  --text-color: #343a40;
  --text-light: #6c757d;
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --shadow-md: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
  --border-radius: 0.5rem;
  --transition: all 0.3s ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background-color);
}

/* 导航栏样式 */
.navbar {
  background-color: var(--primary-color) !important;
  box-shadow: var(--shadow-md);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.navbar-brand .logo {
  height: 40px;
  width: auto;
}

.navbar-brand .brand-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white-color);
}

.navbar-nav .nav-link {
  color: var(--white-color) !important;
  font-weight: 500;
  padding: 0.5rem 1rem;
  transition: var(--transition);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  color: var(--light-color) !important;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
}

.dropdown-menu {
  border: none;
  box-shadow: var(--shadow-lg);
  border-radius: var(--border-radius);
}

.dropdown-item {
  padding: 0.5rem 1rem;
  transition: var(--transition);
}

.dropdown-item:hover {
  background-color: var(--light-color);
  color: var(--primary-color);
}

/* 英雄区域 */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--white-color);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('../images/hero-image.svg') no-repeat center center;
  background-size: cover;
  opacity: 0.1;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  opacity: 0.9;
}

.hero-description {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  max-width: 500px;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-image {
  text-align: center;
  margin-top: 2rem;
}

.hero-image img {
  max-width: 100%;
  height: auto;
}

/* 通用区域样式 */
section {
  padding: 60px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--gray-color);
  max-width: 600px;
  margin: 0 auto;
}

/* 核心业务 */
.core-business {
  background-color: var(--white-color);
}

.business-card {
  background-color: var(--white-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 30px;
  text-align: center;
  transition: var(--transition);
  height: 100%;
  box-shadow: var(--shadow-sm);
}

.business-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.business-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--white-color);
  font-size: 2rem;
}

.business-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--dark-color);
}

.business-description {
  color: var(--gray-color);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* 企业优势 */
.advantages {
  background-color: var(--light-color);
}

.advantage-card {
  background-color: var(--white-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 30px 20px;
  text-align: center;
  transition: var(--transition);
  height: 100%;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.advantage-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.advantage-number {
  font-size: 3rem;
  font-weight: 700;
  color: rgba(0, 123, 255, 0.1);
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 0;
}

.advantage-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--dark-color);
  position: relative;
  z-index: 1;
}

.advantage-description {
  color: var(--gray-color);
  font-size: 0.95rem;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

/* 成功案例 */
.cases {
  background-color: var(--white-color);
}

.case-card {
  background-color: var(--white-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition);
  height: 100%;
  box-shadow: var(--shadow-sm);
}

.case-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.case-image {
  height: 200px;
  overflow: hidden;
}

.case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

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

.case-content {
  padding: 20px;
}

.case-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--dark-color);
}

.case-description {
  color: var(--gray-color);
  font-size: 0.95rem;
  margin-bottom: 15px;
  line-height: 1.6;
}

.case-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.case-link:hover {
  color: var(--primary-dark);
}

/* 新闻动态 */
.news {
  background-color: var(--light-color);
}

.news-card {
  background-color: var(--white-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 20px;
  transition: var(--transition);
  height: 100%;
  box-shadow: var(--shadow-sm);
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.news-date {
  color: var(--primary-color);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 10px;
  display: inline-block;
  background-color: rgba(0, 123, 255, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
}

.news-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--dark-color);
  line-height: 1.4;
}

.news-description {
  color: var(--gray-color);
  font-size: 0.95rem;
  margin-bottom: 15px;
  line-height: 1.6;
}

.news-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.news-link:hover {
  color: var(--primary-dark);
}

/* 联系我们 */
.contact {
  background-color: var(--white-color);
}

.contact-info {
  background-color: var(--light-color);
  border-radius: var(--border-radius);
  padding: 30px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 25px;
  gap: 15px;
}

.contact-item:last-child {
  margin-bottom: 0;
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white-color);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--dark-color);
}

.contact-content p {
  color: var(--gray-color);
  margin: 0;
  font-size: 0.95rem;
}

.contact-form {
  background-color: var(--light-color);
  border-radius: var(--border-radius);
  padding: 30px;
}

.contact-form h3 {
  margin-bottom: 20px;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--dark-color);
}

.form-control {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 10px 15px;
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.form-label {
  font-weight: 500;
  color: var(--dark-color);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  border: none;
  padding: 10px 30px;
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline-light {
  border: 2px solid var(--white-color);
  color: var(--white-color);
  padding: 10px 30px;
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.btn-outline-light:hover {
  background-color: var(--white-color);
  color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* 页脚 */
.footer {
  background-color: var(--dark-color);
  color: var(--white-color);
  padding: 60px 0 30px;
}

.footer-about {
  margin-bottom: 30px;
}

.footer-logo img {
  height: 50px;
  width: auto;
  margin-bottom: 20px;
}

.footer-description {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
  margin-bottom: 20px;
  line-height: 1.6;
}

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

.social-link {
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white-color);
  text-decoration: none;
  transition: var(--transition);
  font-size: 1.2rem;
}

.social-link:hover {
  background-color: var(--primary-color);
  transform: translateY(-3px);
}

.footer-links {
  margin-bottom: 30px;
}

.footer-links h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--white-color);
}

.footer-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

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

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.95rem;
}

.footer-links a:hover {
  color: var(--primary-color);
  padding-left: 5px;
}

.footer-contact {
  margin-bottom: 30px;
}

.footer-contact h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--white-color);
}

.footer-contact-item {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
  gap: 15px;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.8);
}

.footer-contact-item i {
  color: var(--primary-color);
  font-size: 1.2rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 30px;
  margin-top: 30px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.85rem;
}

/* 通用组件样式 */
.container {
  max-width: 1200px;
}

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

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 15px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  border-radius: 2px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--gray-color);
  max-width: 600px;
  margin: 0 auto;
}

/* 页面标题 */
.page-title {
  background-color: var(--primary-color);
  color: var(--white-color);
  padding: 40px 0;
  text-align: center;
  margin-bottom: 40px;
}

.page-title h1 {
  font-size: 2rem;
  font-weight: 600;
  margin: 0;
}

/* 产品页面 */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

.product-card {
  background-color: var(--white-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.product-image {
  height: 200px;
  overflow: hidden;
  background-color: var(--light-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: var(--primary-color);
}

.product-content {
  padding: 20px;
}

.product-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--dark-color);
}

.product-category {
  color: var(--primary-color);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 15px;
  display: inline-block;
  background-color: rgba(0, 123, 255, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
}

.product-description {
  color: var(--gray-color);
  font-size: 0.95rem;
  margin-bottom: 20px;
  line-height: 1.6;
}

.product-features {
  margin-bottom: 20px;
}

.product-features h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--dark-color);
}

.product-features ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.product-features li {
  color: var(--gray-color);
  font-size: 0.9rem;
  margin-bottom: 5px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.product-features li::before {
  content: '✓';
  color: var(--success-color);
  font-weight: 600;
}

.product-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  background-color: var(--light-color);
  border-top: 1px solid var(--border-color);
}

/* 案例页面 */
.cases-filter {
  background-color: var(--white-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 20px;
  margin-bottom: 40px;
  box-shadow: var(--shadow-sm);
}

.cases-filter h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--dark-color);
}

.filter-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.filter-btn {
  background-color: var(--light-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 8px 20px;
  font-size: 0.95rem;
  color: var(--gray-color);
  transition: var(--transition);
  cursor: pointer;
}

.filter-btn.active,
.filter-btn:hover {
  background-color: var(--primary-color);
  color: var(--white-color);
  border-color: var(--primary-color);
}

.case-detail {
  background-color: var(--white-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 30px;
  margin-bottom: 40px;
  box-shadow: var(--shadow-sm);
}

.case-detail h2 {
  margin-bottom: 20px;
  color: var(--dark-color);
}

.case-detail-meta {
  display: flex;
  gap: 20px;
  margin-bottom: 30px;
  color: var(--gray-color);
  font-size: 0.95rem;
}

.case-detail-content {
  color: var(--text-color);
  line-height: 1.8;
}

.case-detail-content h3 {
  margin: 30px 0 15px;
  color: var(--dark-color);
}

.case-detail-content p {
  margin-bottom: 15px;
}

.case-detail-content img {
  max-width: 100%;
  height: auto;
  margin: 20px 0;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
}

/* 新闻页面 */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

.news-detail {
  background-color: var(--white-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 30px;
  margin-bottom: 40px;
  box-shadow: var(--shadow-sm);
}

.news-detail h1 {
  margin-bottom: 20px;
  color: var(--dark-color);
}

.news-detail-meta {
  display: flex;
  gap: 20px;
  margin-bottom: 30px;
  color: var(--gray-color);
  font-size: 0.95rem;
}

.news-detail-content {
  color: var(--text-color);
  line-height: 1.8;
}

.news-detail-content h3 {
  margin: 30px 0 15px;
  color: var(--dark-color);
}

.news-detail-content p {
  margin-bottom: 15px;
}

.news-detail-content img {
  max-width: 100%;
  height: auto;
  margin: 20px 0;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
}

.pagination {
  display: flex;
  justify-content: center;
  margin-top: 40px;
}

.page-link {
  color: var(--primary-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  margin: 0 5px;
  transition: var(--transition);
}

.page-link:hover {
  background-color: var(--primary-color);
  color: var(--white-color);
  border-color: var(--primary-color);
}

.page-item.active .page-link {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

/* 关于我们页面 */
.about-section {
  background-color: var(--white-color);
  padding: 40px;
  border-radius: var(--border-radius);
  margin-bottom: 40px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.about-section h2 {
  margin-bottom: 20px;
  color: var(--dark-color);
}

.about-section p {
  color: var(--text-color);
  line-height: 1.8;
  margin-bottom: 15px;
}

.about-section img {
  max-width: 100%;
  height: auto;
  margin: 20px 0;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
}

.timeline {
  position: relative;
  padding: 40px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 3px;
  background: linear-gradient(180deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
  display: flex;
  justify-content: flex-end;
  padding-right: calc(50% + 30px);
  text-align: right;
}

.timeline-item:nth-child(odd) {
  justify-content: flex-start;
  padding-right: 0;
  padding-left: calc(50% + 30px);
  text-align: left;
}

.timeline-content {
  background-color: var(--white-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  max-width: 400px;
  position: relative;
  transition: var(--transition);
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.timeline-item::after {
  content: '';
  position: absolute;
  top: 20px;
  right: calc(50% - 11px);
  width: 22px;
  height: 22px;
  background-color: var(--primary-color);
  border: 4px solid var(--white-color);
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  z-index: 1;
}

.timeline-item:nth-child(odd)::after {
  right: auto;
  left: calc(50% - 11px);
}

.timeline-year {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 5px;
}

.timeline-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--dark-color);
}

.timeline-description {
  color: var(--gray-color);
  font-size: 0.95rem;
  line-height: 1.6;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

.team-card {
  background-color: var(--white-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.team-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.team-image {
  height: 200px;
  background-color: var(--light-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: var(--primary-color);
}

.team-content {
  padding: 20px;
}

.team-name {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--dark-color);
}

.team-position {
  color: var(--primary-color);
  font-size: 0.9rem;
  margin-bottom: 15px;
}

.team-bio {
  color: var(--gray-color);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

/* 解决方案页面 */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

.solution-card {
  background-color: var(--white-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.solution-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.solution-icon {
  height: 150px;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: var(--white-color);
}

.solution-content {
  padding: 20px;
}

.solution-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--dark-color);
}

.solution-description {
  color: var(--gray-color);
  font-size: 0.95rem;
  margin-bottom: 20px;
  line-height: 1.6;
}

.solution-features {
  margin-bottom: 20px;
}

.solution-features h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--dark-color);
}

.solution-features ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.solution-features li {
  color: var(--gray-color);
  font-size: 0.9rem;
  margin-bottom: 5px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.solution-features li::before {
  content: '✓';
  color: var(--success-color);
  font-weight: 600;
}

/* 响应式设计 */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.2rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .timeline::before {
    left: 30px;
  }
  
  .timeline-item {
    padding-right: 0;
    padding-left: 70px;
    text-align: left;
    justify-content: flex-start;
  }
  
  .timeline-item:nth-child(odd) {
    padding-left: 70px;
  }
  
  .timeline-item::after {
    right: auto;
    left: 20px;
  }
  
  .timeline-item:nth-child(odd)::after {
    left: 20px;
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 60px 0;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .hero-buttons .btn {
    width: 100%;
    text-align: center;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .section-subtitle {
    font-size: 1rem;
  }
  
  section {
    padding: 40px 0;
  }
  
  .contact-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  
  .footer {
    padding: 40px 0 20px;
  }
  
  .footer-bottom {
    text-align: center;
  }
  
  .footer-bottom .row > div {
    margin-bottom: 10px;
  }
  
  .filter-buttons {
    justify-content: center;
  }
  
  .case-detail-meta,
  .news-detail-meta {
    flex-direction: column;
    gap: 10px;
  }
}

@media (max-width: 576px) {
  .navbar-brand .brand-name {
    font-size: 1.2rem;
  }
  
  .hero {
    padding: 40px 0;
  }
  
  .hero-title {
    font-size: 1.8rem;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .section-header {
    margin-bottom: 30px;
  }
  
  .business-card,
  .advantage-card,
  .case-card,
  .news-card {
    padding: 15px;
  }
  
  .contact-info,
  .contact-form {
    padding: 20px;
  }
  
  .products-grid,
  .news-grid,
  .solutions-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }
  
  .product-image,
  .case-image,
  .news-image,
  .team-image {
    height: 150px;
  }
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes bounceIn {
  from {
    opacity: 0;
    transform: scale(0.5);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

.bounce-in {
  animation: bounceIn 0.6s ease-out;
}

/* 滚动动画 */
.scroll-animate {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.6s ease-out;
}

.scroll-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 加载动画 */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(0, 123, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* 辅助类 */
.text-primary {
  color: var(--primary-color) !important;
}

.text-secondary {
  color: var(--secondary-color) !important;
}

.bg-primary {
  background-color: var(--primary-color) !important;
}

.bg-secondary {
  background-color: var(--secondary-color) !important;
}

.mb-0 {
  margin-bottom: 0 !important;
}

.mt-0 {
  margin-top: 0 !important;
}

.mb-1 { margin-bottom: 0.25rem !important; }
.mb-2 { margin-bottom: 0.5rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.mb-5 { margin-bottom: 3rem !important; }

.mt-1 { margin-top: 0.25rem !important; }
.mt-2 { margin-top: 0.5rem !important; }
.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }
.mt-5 { margin-top: 3rem !important; }

.text-center { text-align: center !important; }
.text-left { text-align: left !important; }
.text-right { text-align: right !important; }

.fw-bold { font-weight: 700 !important; }
.fw-semibold { font-weight: 600 !important; }
.fw-medium { font-weight: 500 !important; }
.fw-normal { font-weight: 400 !important; }

.fs-sm { font-size: 0.875rem !important; }
.fs-base { font-size: 1rem !important; }
.fs-lg { font-size: 1.125rem !important; }
.fs-xl { font-size: 1.25rem !important; }
.fs-xxl { font-size: 1.5rem !important; }

.rounded { border-radius: var(--border-radius) !important; }
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow-md { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important;
}