/* mirror_flow:p6_ai_generated */
:root {
  --cn-primary: #003399;
  --cn-primary-light: #1a4dab;
  --cn-primary-dark: #002266;
  --cn-secondary: #0066cc;
  --cn-accent: #ff9900;
  --cn-accent-light: #ffad33;
  --cn-accent-dark: #cc7a00;
  --cn-gray-100: #f8f9fa;
  --cn-gray-200: #e9ecef;
  --cn-gray-300: #dee2e6;
  --cn-gray-400: #ced4da;
  --cn-gray-500: #adb5bd;
  --cn-gray-600: #6c757d;
  --cn-gray-700: #495057;
  --cn-gray-800: #343a40;
  --cn-gray-900: #212529;
  --cn-white: #ffffff;
  --cn-black: #000000;
  --cn-blue-100: #e6f0ff;
  --cn-blue-200: #b3d1ff;
  --cn-blue-300: #80b3ff;
  --cn-blue-400: #4d94ff;
  --cn-blue-500: #1a75ff;
  --cn-accent-100: #fff5e6;
  --cn-accent-200: #ffe0b3;
  --cn-accent-300: #ffcc80;
  --cn-radius-sm: 4px;
  --cn-radius: 8px;
  --cn-radius-lg: 16px;
  --cn-shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --cn-shadow: 0 2px 8px rgba(0,0,0,0.12);
  --cn-shadow-lg: 0 4px 20px rgba(0,0,0,0.15);
  --cn-transition: all 0.3s ease;
  --cn-font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
}

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

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

body {
  font-family: var(--cn-font-family);
  font-size: 14px;
  line-height: 1.6;
  color: var(--cn-gray-800);
  background: var(--cn-white);
  min-width: 320px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--cn-secondary);
  text-decoration: none;
  transition: var(--cn-transition);
}

a:hover {
  color: var(--cn-primary);
  text-decoration: underline;
}

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

ul, ol {
  list-style: none;
}

.main-width {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ========== 顶部工具栏 ========== */
.top-bar {
  background: var(--cn-gray-100);
  border-bottom: 1px solid var(--cn-gray-300);
  font-size: 13px;
  color: var(--cn-gray-600);
  padding: 6px 0;
}

.top-bar .main-width {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.top-bar .contact-info {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.top-bar .contact-info span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.top-bar .contact-info .icon {
  color: var(--cn-primary);
}

.top-bar .lang-switch a {
  color: var(--cn-gray-600);
  padding: 2px 8px;
  border-radius: var(--cn-radius-sm);
}

.top-bar .lang-switch a.active,
.top-bar .lang-switch a:hover {
  background: var(--cn-primary);
  color: var(--cn-white);
  text-decoration: none;
}

/* ========== 主导航 ========== */
.header {
  background: var(--cn-white);
  box-shadow: var(--cn-shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header .main-width {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 10px;
  padding-bottom: 10px;
}

.logo {
  flex-shrink: 0;
}

.logo img {
  height: 50px;
  width: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-list > li {
  position: relative;
}

.nav-list > li > a {
  display: block;
  padding: 10px 18px;
  color: var(--cn-gray-800);
  font-weight: 500;
  font-size: 15px;
  border-radius: var(--cn-radius-sm);
  white-space: nowrap;
  transition: var(--cn-transition);
}

.nav-list > li > a:hover,
.nav-list > li.active > a {
  color: var(--cn-primary);
  background: var(--cn-blue-100);
  text-decoration: none;
}

.nav-list > li.has-sub > a::after {
  content: "▾";
  margin-left: 4px;
  font-size: 10px;
}

.sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--cn-white);
  min-width: 180px;
  box-shadow: var(--cn-shadow-lg);
  border-radius: var(--cn-radius);
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: var(--cn-transition);
  z-index: 100;
}

.nav-list > li.has-sub:hover .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.sub-menu li a {
  display: block;
  padding: 9px 20px;
  color: var(--cn-gray-700);
  font-size: 14px;
  transition: var(--cn-transition);
}

.sub-menu li a:hover {
  background: var(--cn-blue-100);
  color: var(--cn-primary);
  text-decoration: none;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--cn-primary);
  border-radius: 2px;
  transition: var(--cn-transition);
}

/* ========== Banner/轮播 ========== */
.banner {
  position: relative;
  overflow: hidden;
  background: var(--cn-gray-200);
}

.banner-slider {
  display: flex;
  transition: transform 0.6s ease;
}

.banner-slide {
  min-width: 100%;
  position: relative;
}

.banner-slide img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0,51,153,0.7) 0%, rgba(0,51,153,0.15) 60%, transparent 100%);
  display: flex;
  align-items: center;
}

.banner-overlay .main-width {
  width: 100%;
}

.banner-text {
  color: var(--cn-white);
  max-width: 520px;
}

.banner-text h2 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.banner-text p {
  font-size: 16px;
  margin-bottom: 24px;
  opacity: 0.9;
  line-height: 1.7;
}

.banner-text .btn {
  display: inline-block;
  padding: 12px 32px;
  background: var(--cn-accent);
  color: var(--cn-white);
  border-radius: 30px;
  font-weight: 600;
  font-size: 15px;
  transition: var(--cn-transition);
  border: none;
  cursor: pointer;
}

.banner-text .btn:hover {
  background: var(--cn-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,153,0,0.4);
  text-decoration: none;
  color: var(--cn-white);
}

.banner-controls {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
}

.banner-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  border: none;
  cursor: pointer;
  transition: var(--cn-transition);
}

.banner-dot.active {
  background: var(--cn-accent);
  transform: scale(1.3);
}

/* ========== 通用区块标题 ========== */
.section-title {
  text-align: center;
  margin-bottom: 40px;
}

.section-title h2 {
  font-size: 30px;
  color: var(--cn-primary);
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
  padding-bottom: 16px;
}

.section-title h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--cn-accent);
  border-radius: 2px;
}

.section-title p {
  color: var(--cn-gray-600);
  font-size: 15px;
}

/* ========== 关于我们简介 ========== */
.about-intro {
  padding: 60px 0;
  background: var(--cn-white);
}

.about-intro .about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.about-intro .about-image img {
  border-radius: var(--cn-radius-lg);
  box-shadow: var(--cn-shadow-lg);
  width: 100%;
}

.about-intro .about-content h3 {
  font-size: 24px;
  color: var(--cn-primary);
  margin-bottom: 20px;
}

.about-intro .about-content p {
  color: var(--cn-gray-600);
  margin-bottom: 14px;
  line-height: 1.8;
}

.about-intro .about-stats {
  display: flex;
  gap: 30px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.about-intro .stat-item {
  text-align: center;
}

.about-intro .stat-item .num {
  font-size: 32px;
  font-weight: 700;
  color: var(--cn-accent);
  display: block;
}

.about-intro .stat-item .label {
  font-size: 13px;
  color: var(--cn-gray-500);
  margin-top: 4px;
}

/* ========== 产品分类/展示 ========== */
.products-section {
  padding: 60px 0;
  background: var(--cn-gray-100);
}

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

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

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--cn-shadow-lg);
}

.product-card .card-img {
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

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

.product-card:hover .card-img img {
  transform: scale(1.08);
}

.product-card .card-body {
  padding: 20px;
}

.product-card .card-body h4 {
  font-size: 17px;
  color: var(--cn-gray-900);
  margin-bottom: 8px;
}

.product-card .card-body p {
  font-size: 13px;
  color: var(--cn-gray-500);
  margin-bottom: 14px;
  line-height: 1.6;
}

.product-card .card-body .tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--cn-accent-100);
  color: var(--cn-accent-dark);
  font-size: 12px;
  border-radius: 20px;
  font-weight: 500;
}

/* ========== 产品分类标签筛选 ========== */
.filter-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}

.filter-tabs button {
  padding: 8px 22px;
  border: 1px solid var(--cn-gray-300);
  background: var(--cn-white);
  color: var(--cn-gray-700);
  border-radius: 30px;
  cursor: pointer;
  font-size: 14px;
  transition: var(--cn-transition);
  font-family: inherit;
}

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

/* ========== 优势/特点 ========== */
.features-section {
  padding: 60px 0;
  background: var(--cn-white);
}

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

.feature-card {
  text-align: center;
  padding: 32px 20px;
  border-radius: var(--cn-radius);
  transition: var(--cn-transition);
  border: 1px solid transparent;
}

.feature-card:hover {
  border-color: var(--cn-blue-200);
  background: var(--cn-blue-100);
}

.feature-card .feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 18px;
  background: var(--cn-blue-100);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--cn-primary);
}

.feature-card h4 {
  font-size: 16px;
  color: var(--cn-gray-900);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 13px;
  color: var(--cn-gray-500);
  line-height: 1.6;
}

/* ========== CTA ========== */
.cta-section {
  padding: 50px 0;
  background: linear-gradient(135deg, var(--cn-primary) 0%, var(--cn-primary-dark) 100%);
  text-align: center;
  color: var(--cn-white);
}

.cta-section h3 {
  font-size: 26px;
  margin-bottom: 12px;
}

.cta-section p {
  font-size: 15px;
  opacity: 0.85;
  margin-bottom: 24px;
}

.cta-section .btn-white {
  display: inline-block;
  padding: 12px 32px;
  background: var(--cn-white);
  color: var(--cn-primary);
  border-radius: 30px;
  font-weight: 600;
  font-size: 15px;
  transition: var(--cn-transition);
}

.cta-section .btn-white:hover {
  background: var(--cn-accent);
  color: var(--cn-white);
  text-decoration: none;
  transform: translateY(-2px);
}

/* ========== 新闻/资讯 ========== */
.news-section {
  padding: 60px 0;
  background: var(--cn-gray-100);
}

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

.news-card {
  background: var(--cn-white);
  border-radius: var(--cn-radius);
  overflow: hidden;
  box-shadow: var(--cn-shadow-sm);
  transition: var(--cn-transition);
}

.news-card:hover {
  box-shadow: var(--cn-shadow);
  transform: translateY(-4px);
}

.news-card .news-img {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

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

.news-card:hover .news-img img {
  transform: scale(1.06);
}

.news-card .news-body {
  padding: 18px;
}

.news-card .news-date {
  font-size: 12px;
  color: var(--cn-gray-500);
  margin-bottom: 6px;
}

.news