@charset "UTF-8";

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  color: #1A1A1A;
  background-color: #F5F7FA;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: #1A5C9A;
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: #2C2C2C;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  font-weight: 700;
  color: #2C2C2C;
  line-height: 1.3;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

p {
  margin-bottom: 1rem;
  color: #1A1A1A;
}

/* ============================================
   基础布局 (Layout)
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部导航 */
.site-header {
  background-color: #FFFFFF;
  border-bottom: 1px solid #E8EAED;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #2C2C2C;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
}

.logo-img {
  display: block;
  height: 44px;
  width: auto;
  object-fit: contain;
}

.logo:hover {
  color: #1A5C9A;
}

.main-nav {
  display: flex;
  align-items: center;
}

.main-nav a {
  color: #2C2C2C;
  padding: 8px 18px;
  font-size: 1rem;
  font-weight: 500;
  border-radius: 4px;
  transition: all 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
  color: #1A5C9A;
  background-color: rgba(26, 92, 154, 0.08);
}

/* 导航切换按钮（移动端） */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #2C2C2C;
  margin: 5px 0;
  transition: all 0.3s ease;
}

/* 主体区域 */
main {
  min-height: calc(100vh - 72px - 240px);
}

/* 通用 section 间距 */
section {
  padding: 64px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h1,
.section-header h2 {
  margin-bottom: 12px;
}

.section-header p {
  color: #666666;
  font-size: 1.0625rem;
}

/* 底部 */
.site-footer {
  background-color: #2C2C2C;
  color: #CCCCCC;
  padding: 48px 0 24px;
  margin-top: 48px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 32px;
}

.footer-content h4 {
  color: #FFFFFF;
  margin-bottom: 16px;
  font-size: 1.0625rem;
}

.footer-content p {
  color: #CCCCCC;
  font-size: 0.9375rem;
  margin-bottom: 8px;
}

.footer-content a {
  color: #CCCCCC;
}

.footer-content a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 0.875rem;
  color: #999999;
}

/* ============================================
   组件样式 (Components)
   ============================================ */

/* 首屏大横幅 */
.hero {
  background: linear-gradient(135deg, #2C2C2C 0%, #1A5C9A 100%);
  color: #FFFFFF;
  padding: 96px 0;
  text-align: center;
}

.hero h1 {
  color: #FFFFFF;
  font-size: 2.75rem;
  margin-bottom: 16px;
}

.hero p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.25rem;
  max-width: 720px;
  margin: 0 auto;
}

.hero .brand-tag {
  display: inline-block;
  margin-top: 24px;
  padding: 8px 20px;
  background-color: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  font-size: 0.9375rem;
  letter-spacing: 1px;
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: 12px 28px;
  background-color: #1A5C9A;
  color: #FFFFFF;
  border-radius: 4px;
  font-weight: 500;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn:hover {
  background-color: #2C2C2C;
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-outline {
  background-color: transparent;
  color: #1A5C9A;
  border: 2px solid #1A5C9A;
}

.btn-outline:hover {
  background-color: #1A5C9A;
  color: #FFFFFF;
}

/* 卡片 */
.card {
  background-color: #FFFFFF;
  border-radius: 8px;
  padding: 32px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border: 1px solid #E8EAED;
}

.card:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
  transform: translateY(-4px);
}

/* 核心卖点网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background-color: #FFFFFF;
  border-radius: 8px;
  padding: 32px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border-left: 4px solid #1A5C9A;
}

.feature-card:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
  transform: translateY(-4px);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: rgba(26, 92, 154, 0.1);
  color: #1A5C9A;
  border-radius: 8px;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  margin-bottom: 12px;
  font-size: 1.125rem;
}

.feature-card p {
  color: #666666;
  font-size: 0.9375rem;
  margin: 0;
}

/* 产品分类入口 */
.product-categories {
  background-color: #F5F7FA;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.category-card {
  background-color: #FFFFFF;
  border-radius: 8px;
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border: 1px solid #E8EAED;
  cursor: pointer;
}

.category-card:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
  transform: translateY(-4px);
  border-color: #1A5C9A;
}

.category-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background-color: #F5F7FA;
  color: #1A5C9A;
  border-radius: 50%;
  font-size: 1.75rem;
  margin-bottom: 16px;
}

.category-card h3 {
  margin-bottom: 8px;
}

.category-card p {
  color: #666666;
  font-size: 0.875rem;
  margin: 0;
}

/* 品牌背书区 */
.brand-section {
  background-color: #FFFFFF;
  text-align: center;
}

.brand-list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 24px;
}

.brand-tag {
  display: inline-block;
  padding: 10px 24px;
  background-color: #F5F7FA;
  border: 1px solid #E8EAED;
  border-radius: 4px;
  font-weight: 600;
  color: #2C2C2C;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.brand-tag:hover {
  background-color: #1A5C9A;
  color: #FFFFFF;
  border-color: #1A5C9A;
}

/* 新闻列表 */
.news-preview {
  background-color: #F5F7FA;
}

.news-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.news-item {
  background-color: #FFFFFF;
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border: 1px solid #E8EAED;
}

.news-item:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
  transform: translateY(-4px);
}

.news-item time {
  display: block;
  color: #666666;
  font-size: 0.8125rem;
  margin-bottom: 12px;
}

.news-item h3 {
  font-size: 1.0625rem;
  margin-bottom: 12px;
  line-height: 1.5;
}

.news-item h3 a {
  color: #2C2C2C;
}

.news-item h3 a:hover {
  color: #1A5C9A;
}

.news-item p {
  color: #666666;
  font-size: 0.875rem;
  margin: 0;
  line-height: 1.6;
}

.news-more {
  text-align: center;
  margin-top: 32px;
}

/* 联系信息区 */
.contact-section {
  background-color: #FFFFFF;
  text-align: center;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 32px;
}

.contact-item {
  padding: 24px;
}

.contact-item h4 {
  color: #1A5C9A;
  margin-bottom: 12px;
}

.contact-item p {
  color: #666666;
  margin: 0;
  font-size: 1rem;
}

.contact-item a {
  color: #1A5C9A;
  font-weight: 500;
  font-size: 1.125rem;
}

.contact-item a:hover {
  color: #2C2C2C;
}

/* 产品详情页 - 关键词标签 */
.product-category {
  margin-bottom: 48px;
}

.product-category .card {
  padding: 40px;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.product-tag {
  display: inline-block;
  padding: 4px 14px;
  background-color: rgba(26, 92, 154, 0.08);
  color: #1A5C9A;
  border-radius: 4px;
  font-size: 0.8125rem;
  font-weight: 500;
}

.product-category p {
  color: #666666;
  font-size: 1rem;
  line-height: 1.8;
}

/* 新闻页 - 文章列表 */
.news-article {
  background-color: #FFFFFF;
  border-radius: 8px;
  padding: 40px;
  margin-bottom: 32px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  border: 1px solid #E8EAED;
}

.news-article time {
  display: block;
  color: #666666;
  font-size: 0.875rem;
  margin-bottom: 16px;
}

.news-article h2 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: #2C2C2C;
}

.news-article h2:hover {
  color: #1A5C9A;
}

.news-article p {
  color: #333333;
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.news-divider {
  border: none;
  border-top: 1px solid #E8EAED;
  margin: 0 0 32px;
}

/* 关于我们页 */
.about-content {
  background-color: #FFFFFF;
  border-radius: 8px;
  padding: 48px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  border: 1px solid #E8EAED;
}

.about-content p {
  font-size: 1.0625rem;
  line-height: 1.9;
  color: #333333;
  margin-bottom: 20px;
}

.about-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.about-info-item {
  padding: 20px;
  background-color: #F5F7FA;
  border-radius: 6px;
  border-left: 3px solid #1A5C9A;
}

.about-info-item h4 {
  color: #1A5C9A;
  margin-bottom: 8px;
  font-size: 1rem;
}

.about-info-item p {
  margin: 0;
  font-size: 0.9375rem;
  color: #333333;
}

.about-info-item a {
  color: #1A5C9A;
  font-weight: 500;
}

.about-info-item a:hover {
  color: #2C2C2C;
}

/* 页面标题区 */
.page-header {
  background-color: #FFFFFF;
  border-bottom: 1px solid #E8EAED;
  padding: 56px 0 40px;
  text-align: center;
}

.page-header h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.page-header p {
  color: #666666;
  font-size: 1rem;
  margin: 0;
}

/* ============================================
   响应式 (Responsive)
   ============================================ */

/* 平板 */
@media (max-width: 992px) {
  h1 { font-size: 1.875rem; }
  h2 { font-size: 1.5rem; }

  .hero { padding: 72px 0; }
  .hero h1 { font-size: 2.25rem; }

  section { padding: 48px 0; }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .news-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 手机 */
@media (max-width: 768px) {
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
  h3 { font-size: 1.125rem; }

  .container {
    padding: 0 16px;
  }

  section { padding: 36px 0; }

  .site-header .container {
    height: 60px;
  }

  /* 移动端导航 */
  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background-color: #FFFFFF;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 0;
    border-bottom: 1px solid #E8EAED;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-120%);
    transition: transform 0.3s ease;
  }

  .main-nav.open {
    transform: translateY(0);
  }

  .main-nav a {
    padding: 14px 24px;
    border-radius: 0;
    border-bottom: 1px solid #F5F7FA;
  }

  .main-nav a:last-child {
    border-bottom: none;
  }

  /* 首屏 */
  .hero {
    padding: 56px 0;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

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

  /* 网格改为单列 */
  .features-grid,
  .category-grid,
  .news-list,
  .contact-grid,
  .footer-content,
  .about-info {
    grid-template-columns: 1fr;
  }

  .card,
  .feature-card,
  .news-item,
  .news-article,
  .about-content {
    padding: 24px;
  }

  .news-article {
    padding: 28px 20px;
  }

  .news-article h2 {
    font-size: 1.25rem;
  }

  .page-header {
    padding: 40px 0 32px;
  }

  .page-header h1 {
    font-size: 1.5rem;
  }

  /* 页脚 */
  .site-footer {
    padding: 36px 0 20px;
  }
}

/* ============================================
   产品页样式 (Products)
   ============================================ */

/* 产品分类导航 */
.product-nav {
  background-color: #FFFFFF;
  border-bottom: 1px solid #E8EAED;
  padding: 16px 0;
  position: sticky;
  top: 72px;
  z-index: 50;
}

.product-nav .container {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.product-nav-item {
  padding: 8px 24px;
  background-color: #F5F7FA;
  color: #2C2C2C;
  border-radius: 4px;
  font-weight: 500;
  font-size: 0.9375rem;
  transition: all 0.3s ease;
}

.product-nav-item:hover {
  background-color: #1A5C9A;
  color: #FFFFFF;
}

/* 产品网格 */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  background-color: #FFFFFF;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border: 1px solid #E8EAED;
}

.product-card:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
  transform: translateY(-4px);
}

.product-img {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: #FFFFFF;
}

.product-info {
  padding: 24px;
  position: relative;
}

.product-info h3 {
  font-size: 1.125rem;
  margin-bottom: 12px;
}

.product-info > p {
  color: #666666;
  font-size: 0.875rem;
  margin-bottom: 16px;
  line-height: 1.6;
}

.feature-list {
  margin-bottom: 16px;
}

.feature-list li {
  color: #333333;
  font-size: 0.875rem;
  padding: 4px 0;
}

.stock-tag {
  display: inline-block;
  padding: 4px 12px;
  background-color: rgba(39, 174, 96, 0.1);
  color: #27AE60;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* 产品分类交替背景 */
.product-category.alt {
  background-color: #F5F7FA;
}

/* 服务承诺区 */
.service-section {
  background-color: #FFFFFF;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.service-item {
  text-align: center;
  padding: 20px;
  background-color: #F5F7FA;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.service-item:hover {
  background-color: rgba(26, 92, 154, 0.08);
}

.service-item h4 {
  color: #1A5C9A;
  margin-bottom: 8px;
  font-size: 1rem;
}

.service-item p {
  color: #666666;
  font-size: 0.8125rem;
  margin: 0;
}

/* CTA 区 */
.cta-section {
  background: linear-gradient(135deg, #2C2C2C 0%, #1A5C9A 100%);
  color: #FFFFFF;
  text-align: center;
}

.cta-section h2 {
  color: #FFFFFF;
  margin-bottom: 12px;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 24px;
}

.btn-primary {
  background-color: #FFFFFF;
  color: #1A5C9A;
}

.btn-primary:hover {
  background-color: #F5F7FA;
  color: #1A5C9A;
}

/* ============================================
   新闻页样式 (News)
   ============================================ */

/* 热门推荐 */
.news-featured {
  background-color: #F5F7FA;
  padding: 48px 0;
}

.featured-article {
  background-color: #FFFFFF;
  border-radius: 8px;
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 40px;
  align-items: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  border: 1px solid #E8EAED;
}

.featured-img {
  height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  color: #FFFFFF;
  border-radius: 8px;
}

.featured-content time {
  display: block;
  color: #666666;
  font-size: 0.875rem;
  margin-bottom: 8px;
}

.featured-content h2 {
  font-size: 1.5rem;
  margin-bottom: 16px;
  line-height: 1.5;
}

.featured-content h2:hover {
  color: #1A5C9A;
}

.featured-content p {
  color: #666666;
  line-height: 1.8;
  margin-bottom: 16px;
}

/* 新闻文章列表 */
.news-articles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.news-article {
  background-color: #FFFFFF;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border: 1px solid #E8EAED;
  display: flex;
  flex-direction: column;
  padding: 0;
}

.news-article:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
  transform: translateY(-4px);
}

.news-thumb {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: #FFFFFF;
}

.news-body {
  padding: 24px;
}

.news-meta {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 12px;
}

.news-meta time {
  color: #666666;
  font-size: 0.8125rem;
  margin: 0;
}

.tag {
  display: inline-block;
  padding: 2px 10px;
  background-color: rgba(26, 92, 154, 0.08);
  color: #1A5C9A;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.news-body h3 {
  font-size: 1.0625rem;
  margin-bottom: 12px;
  line-height: 1.5;
}

.news-body h3:hover {
  color: #1A5C9A;
}

.news-body p {
  color: #666666;
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

.read-more {
  color: #1A5C9A;
  font-weight: 500;
  font-size: 0.875rem;
}

.read-more:hover {
  color: #2C2C2C;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
}

.page {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  background-color: #FFFFFF;
  border: 1px solid #E8EAED;
  border-radius: 4px;
  color: #2C2C2C;
  font-weight: 500;
  transition: all 0.3s ease;
}

.page:hover,
.page.active {
  background-color: #1A5C9A;
  color: #FFFFFF;
  border-color: #1A5C9A;
}

/* ============================================
   关于我们页样式 (About)
   ============================================ */

/* 公司介绍 */
.about-intro {
  background-color: #FFFFFF;
}

.intro-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.intro-content h2 {
  margin-bottom: 24px;
  font-size: 2rem;
}

.intro-content p {
  color: #333333;
  line-height: 1.9;
  font-size: 1.0625rem;
  margin-bottom: 20px;
}

/* 发展历程 */
.history-section {
  background-color: #F5F7FA;
}

.timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: #1A5C9A;
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
}

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

.timeline-item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 6px;
  width: 16px;
  height: 16px;
  background-color: #1A5C9A;
  border-radius: 50%;
  border: 3px solid #FFFFFF;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.timeline-year {
  display: inline-block;
  padding: 4px 16px;
  background-color: #1A5C9A;
  color: #FFFFFF;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 8px;
}

.timeline-content {
  background-color: #FFFFFF;
  padding: 20px 24px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.timeline-content h4 {
  color: #1A5C9A;
  margin-bottom: 8px;
}

.timeline-content p {
  color: #666666;
  margin: 0;
}

/* 核心优势 */
.advantages {
  background-color: #FFFFFF;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage-item {
  text-align: center;
  padding: 32px 24px;
  border-radius: 8px;
  background-color: #F5F7FA;
  transition: all 0.3s ease;
}

.advantage-item:hover {
  background-color: rgba(26, 92, 154, 0.06);
  transform: translateY(-4px);
}

.advantage-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background-color: rgba(26, 92, 154, 0.1);
  color: #1A5C9A;
  border-radius: 50%;
  font-size: 1.75rem;
  margin-bottom: 16px;
}

.advantage-item h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.advantage-item p {
  color: #666666;
  font-size: 0.875rem;
  margin: 0;
}

/* 主营品类 */
.main-categories {
  background-color: #F5F7FA;
}

.category-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.category-item {
  background-color: #FFFFFF;
  padding: 28px;
  border-radius: 8px;
  text-align: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
}

.category-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.category-item h4 {
  color: #1A5C9A;
  margin-bottom: 12px;
}

.category-item p {
  color: #666666;
  font-size: 0.875rem;
  margin: 0;
}

/* 品牌展示 */
.brands {
  background-color: #FFFFFF;
}

.brand-showcase {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
}

.brand-card {
  min-width: 160px;
  padding: 32px 24px;
  background-color: #F5F7FA;
  border-radius: 8px;
  text-align: center;
  transition: all 0.3s ease;
}

.brand-card:hover {
  background-color: rgba(26, 92, 154, 0.08);
  transform: translateY(-4px);
}

.brand-card.featured-brand {
  background: linear-gradient(135deg, #1A5C9A 0%, #2C2C2C 100%);
}

.brand-card.featured-brand h3,
.brand-card.featured-brand p {
  color: #FFFFFF;
}

.brand-card h3 {
  font-size: 1.375rem;
  margin-bottom: 8px;
}

.brand-card p {
  color: #666666;
  font-size: 0.875rem;
  margin: 0;
}

/* 团队介绍 */
.team-section {
  background-color: #F5F7FA;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.team-card {
  background-color: #FFFFFF;
  border-radius: 8px;
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
}

.team-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-size: 2rem;
  font-weight: 700;
  margin: 0 auto 16px;
}

.team-card h4 {
  font-size: 1.125rem;
  margin-bottom: 4px;
}

.team-role {
  color: #1A5C9A;
  font-weight: 500;
  font-size: 0.875rem;
  margin-bottom: 12px;
}

.team-card p {
  color: #666666;
  font-size: 0.8125rem;
  margin: 0;
  line-height: 1.6;
}

/* ============================================
   补充响应式 (Additional Responsive)
   ============================================ */

@media (max-width: 992px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .service-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .featured-article {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .featured-img {
    height: 180px;
  }

  .news-articles {
    grid-template-columns: 1fr;
  }

  .advantage-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .category-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-nav {
    top: 60px;
  }
}

@media (max-width: 768px) {
  .product-grid {
    grid-template-columns: 1fr;
  }

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

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

  .category-list {
    grid-template-columns: 1fr;
  }

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

  .featured-article {
    padding: 24px;
  }

  .product-nav .container {
    gap: 8px;
  }

  .product-nav-item {
    padding: 6px 16px;
    font-size: 0.875rem;
  }

  .timeline {
    padding-left: 32px;
  }

  .brand-showcase {
    gap: 12px;
  }

  .brand-card {
    min-width: 130px;
    padding: 24px 16px;
  }
}

/* ============================================
   面包屑导航（文章页）
   ============================================ */
.breadcrumb-nav {
  background-color: #f8f9fa;
  border-bottom: 1px solid #e8e8e8;
  padding: 16px 0;
}

.breadcrumb-nav nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: #666666;
  flex-wrap: wrap;
}

.breadcrumb-nav a {
  color: #1A5C9A;
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumb-nav a:hover {
  color: #14507A;
  text-decoration: underline;
}

.breadcrumb-sep {
  color: #cccccc;
}

.breadcrumb-current {
  color: #333333;
  font-weight: 500;
  max-width: 600px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ============================================
   文章页面样式
   ============================================ */
.article-page {
  padding: 56px 0;
  background-color: #ffffff;
}

.article-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid #e8e8e8;
}

.article-header h1 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 16px;
  color: #1a1a1a;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: #666666;
}

.article-meta time {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-category {
  display: inline-block;
  padding: 3px 12px;
  background-color: rgba(26, 92, 154, 0.08);
  color: #1A5C9A;
  border-radius: 4px;
  font-weight: 500;
}

.article-content {
  font-size: 1rem;
  line-height: 1.8;
  color: #333333;
  max-width: 800px;
}

.article-content section {
  margin-bottom: 32px;
}

.article-content h2 {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: #1a1a1a;
  padding-left: 14px;
  border-left: 4px solid #1A5C9A;
  line-height: 1.4;
}

.article-content h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 20px 0 12px;
  color: #333333;
}

.article-content p {
  margin-bottom: 16px;
  text-align: justify;
}

.article-content strong {
  color: #1A5C9A;
  font-weight: 600;
}

.article-content ul,
.article-content ol {
  margin: 16px 0;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 10px;
  line-height: 1.7;
}

.article-content ul li {
  list-style-type: disc;
}

.article-content ol li {
  list-style-type: decimal;
}

/* 文章底部返回链接 */
.article-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid #e8e8e8;
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #1A5C9A;
  font-weight: 500;
  text-decoration: none;
  padding: 10px 24px;
  border: 1px solid #1A5C9A;
  border-radius: 6px;
  transition: all 0.25s ease;
}

.article-back:hover {
  background-color: #1A5C9A;
  color: #ffffff;
}

/* ============================================
   文章索引页（news.html）列表样式
   ============================================ */
.news-index {
  padding: 56px 0;
  background-color: #ffffff;
}

.news-index-list {
  max-width: 800px;
  margin: 0 auto;
}

.news-index-item {
  display: block;
  padding: 24px 0;
  border-bottom: 1px solid #e8e8e8;
  text-decoration: none;
  color: inherit;
  transition: background-color 0.2s ease;
}

.news-index-item:hover {
  background-color: #f8f9fa;
  padding-left: 16px;
  padding-right: 16px;
  border-radius: 4px;
}

.news-index-item:last-child {
  border-bottom: none;
}

.news-index-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 8px;
  line-height: 1.4;
  transition: color 0.2s ease;
}

.news-index-item:hover .news-index-title {
  color: #1A5C9A;
}

.news-index-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8125rem;
  color: #999999;
  margin-bottom: 8px;
}

.news-index-meta .news-index-sep {
  color: #dddddd;
}

.news-index-desc {
  font-size: 0.9375rem;
  color: #666666;
  line-height: 1.6;
}

/* 文章页面 & 索引页响应式 */
@media (max-width: 768px) {
  .article-page {
    padding: 32px 0;
  }

  .article-header {
    margin-bottom: 24px;
  }

  .article-header h1 {
    font-size: 1.5rem;
    line-height: 1.4;
  }

  .article-content {
    font-size: 0.9375rem;
    line-height: 1.75;
  }

  .article-content h2 {
    font-size: 1.125rem;
  }

  .news-index {
    padding: 32px 0;
  }

  .news-index-title {
    font-size: 1.0625rem;
  }

  .news-index-desc {
    font-size: 0.875rem;
  }

  .breadcrumb-nav nav {
    font-size: 0.8125rem;
  }

  .breadcrumb-current {
    max-width: 200px;
  }
}