/* 吉瑞电子官网样式 */
:root {
  --primary: #1a56db;
  --primary-dark: #1e429f;
  --secondary: #0e9f6e;
  --accent: #f59e0b;
  --dark: #1f2937;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  color: var(--gray-800);
  line-height: 1.6;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; }

/* 顶部信息栏 */
.top-bar {
  background: var(--gray-900);
  color: #fff;
  font-size: 13px;
  padding: 8px 0;
}
.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.top-bar-left { display: flex; align-items: center; gap: 15px; }
.top-bar-left .company { font-weight: 600; }
.top-bar-left .phone { color: var(--accent); font-weight: 600; font-size: 15px; }
.top-bar-right { display: flex; align-items: center; gap: 20px; }
.top-bar-right a {
  color: #fff;
  transition: color 0.3s;
}
.top-bar-right a:hover { color: var(--accent); }

/* 导航栏 */
.navbar {
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
}
.logo img { height: 40px; }
.nav-menu {
  display: flex;
  list-style: none;
  gap: 5px;
}
.nav-menu li { position: relative; }
.nav-menu a {
  display: block;
  padding: 10px 18px;
  color: var(--gray-700);
  font-weight: 500;
  transition: all 0.3s;
  border-radius: 4px;
}
.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary);
  background: var(--gray-50);
}
.nav-menu .dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: #fff;
  min-width: 200px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  border-radius: 6px;
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s;
}
.nav-menu li:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-menu .dropdown a {
  padding: 10px 20px;
  border-radius: 0;
}
.search-box {
  display: flex;
  align-items: center;
  border: 1px solid var(--gray-300);
  border-radius: 20px;
  padding: 6px 15px;
  width: 220px;
}
.search-box input {
  border: none;
  outline: none;
  flex: 1;
  font-size: 14px;
}
.search-box button {
  background: none;
  border: none;
  color: var(--gray-600);
  cursor: pointer;
}

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

/* Banner */
.banner {
  background: linear-gradient(135deg, #1e3a8a 0%, #1a56db 50%, #3b82f6 100%);
  color: #fff;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.banner::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 50%;
  height: 100%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="80" cy="30" r="40" fill="rgba(255,255,255,0.05)"/></svg>');
  background-size: cover;
}
.banner .container {
  display: flex;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 1;
}
.banner-content { flex: 1; }
.banner h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.3;
}
.banner p {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 30px;
  line-height: 1.8;
}
.banner-btn {
  display: inline-block;
  padding: 12px 32px;
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
  font-weight: 600;
  transition: all 0.3s;
}
.banner-btn:hover {
  background: #d97706;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
}
.banner-image {
  flex: 1;
  text-align: center;
}
.banner-image img {
  max-width: 450px;
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

/* 数据展示 */
.stats {
  background: #fff;
  padding: 50px 0;
  border-bottom: 1px solid var(--gray-200);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 30px;
  text-align: center;
}
.stat-item .number {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 5px;
}
.stat-item .label {
  font-size: 14px;
  color: var(--gray-600);
}

/* 资质认证 */
.certifications {
  background: var(--gray-50);
  padding: 30px 0;
}
.cert-grid {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}
.cert-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--gray-600);
  font-size: 14px;
}
.cert-item i {
  font-size: 24px;
  color: var(--secondary);
}

/* 通用区块 */
.section {
  padding: 70px 0;
}
.section-header {
  text-align: center;
  margin-bottom: 50px;
}
.section-header h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 10px;
}
.section-header p {
  color: var(--gray-600);
  font-size: 16px;
}
.section-header .line {
  width: 60px;
  height: 3px;
  background: var(--primary);
  margin: 15px auto 0;
  border-radius: 2px;
}

/* 产品中心 */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.product-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s;
}
.product-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.1);
  border-color: var(--primary);
}
.product-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  background: var(--gray-50);
}
.product-card .info {
  padding: 20px;
}
.product-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--gray-900);
  display: flex;
  align-items: center;
  gap: 8px;
}
.product-card h3::before {
  content: '';
  width: 4px;
  height: 18px;
  background: var(--primary);
  border-radius: 2px;
}
.product-card p {
  color: var(--gray-600);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 15px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-card .more {
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.product-card .more:hover { gap: 8px; }

/* 应用场景 */
.applications {
  background: var(--gray-50);
}
.app-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 25px;
}
.app-card {
  background: #fff;
  border-radius: 8px;
  padding: 30px 20px;
  text-align: center;
  transition: all 0.3s;
}
.app-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}
.app-card .icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 15px;
  color: #fff;
  font-size: 24px;
}
.app-card h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}
.app-card p {
  font-size: 13px;
  color: var(--gray-600);
}

/* 公司优势 */
.advantages {
  background: #fff;
}
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}
.adv-item {
  text-align: center;
  padding: 30px 20px;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  transition: all 0.3s;
}
.adv-item:hover {
  border-color: var(--primary);
  box-shadow: 0 8px 20px rgba(26, 86, 219, 0.1);
}
.adv-item .icon {
  font-size: 40px;
  color: var(--primary);
  margin-bottom: 15px;
}
.adv-item h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}
.adv-item p {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.7;
}

/* CTA 区域 */
.cta {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  padding: 60px 0;
  text-align: center;
}
.cta h2 {
  font-size: 28px;
  margin-bottom: 15px;
}
.cta p {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 30px;
}
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
}
.cta-btn {
  padding: 12px 32px;
  border-radius: 4px;
  font-weight: 600;
  transition: all 0.3s;
}
.cta-btn.primary {
  background: var(--accent);
  color: #fff;
}
.cta-btn.primary:hover { background: #d97706; }
.cta-btn.outline {
  border: 2px solid #fff;
  color: #fff;
}
.cta-btn.outline:hover {
  background: #fff;
  color: var(--primary);
}

/* 底部 */
.footer {
  background: var(--gray-900);
  color: var(--gray-300);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 20px;
  font-weight: 600;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  color: var(--gray-400);
  font-size: 14px;
  transition: color 0.3s;
}
.footer-col a:hover { color: var(--accent); }
.footer-col .contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 15px;
  font-size: 14px;
}
.footer-col .contact-item i {
  color: var(--accent);
  margin-top: 3px;
}
.footer-bottom {
  border-top: 1px solid var(--gray-800);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: var(--gray-500);
}

/* 右侧悬浮客服 */
.floating-service {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 999;
}
.floating-service a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background: var(--primary);
  color: #fff;
  margin-bottom: 2px;
  transition: all 0.3s;
  font-size: 11px;
  gap: 3px;
}
.floating-service a:first-child { border-radius: 6px 6px 0 0; }
.floating-service a:last-child { border-radius: 0 0 6px 6px; }
.floating-service a:hover {
  background: var(--accent);
  width: 68px;
}
.floating-service i { font-size: 18px; }
.back-top {
  display: none;
  cursor: pointer;
}
.back-top.show { display: flex; }

/* 页面标题栏 */
.page-header {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  padding: 50px 0;
  text-align: center;
}
.page-header h1 {
  font-size: 32px;
  margin-bottom: 10px;
}
.page-header .breadcrumb {
  font-size: 14px;
  opacity: 0.9;
}
.page-header .breadcrumb a { color: #fff; }
.page-header .breadcrumb span { margin: 0 8px; }

/* 产品筛选 */
.product-filter {
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 30px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.filter-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.filter-btn {
  padding: 8px 20px;
  border: 1px solid var(--gray-300);
  border-radius: 20px;
  background: #fff;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 14px;
}
.filter-btn:hover,
.filter-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* 产品详情 */
.product-detail {
  padding: 50px 0;
}
.product-detail .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}
.product-gallery {
  background: var(--gray-50);
  border-radius: 8px;
  padding: 30px;
  text-align: center;
}
.product-gallery .main-img {
  width: 100%;
  max-height: 400px;
  object-fit: contain;
  margin-bottom: 20px;
}
.product-gallery .thumbs {
  display: flex;
  gap: 10px;
  justify-content: center;
}
.product-gallery .thumb {
  width: 80px;
  height: 80px;
  border: 2px solid var(--gray-200);
  border-radius: 4px;
  cursor: pointer;
  object-fit: cover;
  transition: border-color 0.3s;
}
.product-gallery .thumb:hover,
.product-gallery .thumb.active {
  border-color: var(--primary);
}
.product-info h1 {
  font-size: 28px;
  margin-bottom: 15px;
}
.product-info .model {
  color: var(--gray-600);
  margin-bottom: 20px;
  font-size: 16px;
}
.product-info .price {
  font-size: 24px;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 20px;
}
.product-info .desc {
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 30px;
}
.product-info .params {
  background: var(--gray-50);
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 30px;
}
.product-info .params h4 {
  font-size: 16px;
  margin-bottom: 15px;
}
.product-info .params table {
  width: 100%;
  font-size: 14px;
}
.product-info .params td {
  padding: 8px 0;
  border-bottom: 1px solid var(--gray-200);
}
.product-info .params td:first-child {
  color: var(--gray-600);
  width: 120px;
}
.product-info .actions {
  display: flex;
  gap: 15px;
}
.btn {
  padding: 12px 28px;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.3s;
  font-size: 15px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline {
  border: 2px solid var(--primary);
  color: var(--primary);
  background: #fff;
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}

/* 关于我们 */
.about-section {
  padding: 70px 0;
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-content h2 {
  font-size: 28px;
  margin-bottom: 20px;
  color: var(--gray-900);
}
.about-content p {
  color: var(--gray-600);
  line-height: 1.9;
  margin-bottom: 20px;
}
.about-image img {
  border-radius: 8px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.15);
}

/* 联系我们 */
.contact-section {
  padding: 70px 0;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 50px;
}
.contact-info h2 {
  font-size: 28px;
  margin-bottom: 30px;
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  margin-bottom: 25px;
}
.contact-item .icon {
  width: 50px;
  height: 50px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  flex-shrink: 0;
}
.contact-item h4 {
  font-size: 16px;
  margin-bottom: 5px;
}
.contact-item p {
  color: var(--gray-600);
  font-size: 14px;
}
.contact-form {
  background: #fff;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.contact-form h3 {
  font-size: 22px;
  margin-bottom: 25px;
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  font-size: 14px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 15px;
  border: 1px solid var(--gray-300);
  border-radius: 4px;
  font-size: 14px;
  transition: border-color 0.3s;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* 语言切换 */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-left: 15px;
}
.lang-switch button {
  background: none;
  border: 1px solid var(--gray-300);
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.3s;
}
.lang-switch button.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* 响应式 */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(3, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .top-bar { display: none; }
  .nav-menu { display: none; }
  .search-box { display: none; }
  .banner .container { flex-direction: column; text-align: center; }
  .banner h1 { font-size: 28px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .product-detail .container { grid-template-columns: 1fr; }
  .floating-service { display: none; }
}