/* ========== 基础重置与变量 ========== */
:root {
  --primary: #1a56db;
  --primary-dark: #1e429f;
  --primary-light: #e1effe;
  --text-main: #111827;
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;
  --bg-body: #f8fafc;
  --bg-white: #ffffff;
  --bg-card: #ffffff;
  --border: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 1200px;
  --header-height: 72px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text-main);
  background: var(--bg-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }

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

/* ========== 导航栏 ========== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: box-shadow 0.3s;
}

.header.scrolled { box-shadow: var(--shadow); }

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}

.logo img { height: 114px; width: auto; }

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.nav a:hover, .nav a.active {
  color: var(--primary);
  background: var(--primary-light);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  margin: 5px 0;
  transition: 0.3s;
}

/* ========== 页面通用 ========== */
.page-content {
  padding-top: var(--header-height);
  min-height: 100vh;
}

.section {
  padding: 80px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  color: var(--text-main);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 48px;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-outline:hover { background: var(--primary-light); }

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f8fafc 100%);
  overflow: hidden;
  padding: 120px 24px 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%231a56db' fill-opacity='1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-inner {
  position: relative;
  max-width: var(--max-width);
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-text h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--text-main) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-text p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-img {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--bg-white);
}

.hero-img img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ========== 产品卡片 ========== */
.product-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
}

.product-grid .product-card {
  width: 320px;
  flex-shrink: 0;
}

.product-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.3s;
  cursor: pointer;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.product-card-img {
  aspect-ratio: 4/3;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 16px;
}

.product-card-img img {
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
  transition: transform 0.3s;
}

.product-card:hover .product-card-img img { transform: scale(1.03); }

.product-card-body { padding: 24px; }

.product-card-series {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.product-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.product-card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
}

.product-card-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 999px;
  background: #eff6ff;
  color: var(--primary);
  font-weight: 500;
}

/* ========== 系列区块 ========== */
.series-section {
  margin-bottom: 64px;
}

.series-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 24px;
}

.series-title {
  font-size: 1.75rem;
  font-weight: 700;
}

.series-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ========== 产品详情页 ========== */
.breadcrumb {
  padding: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.breadcrumb a { color: var(--primary); }

.breadcrumb a:hover { text-decoration: underline; }

.breadcrumb span { margin: 0 8px; color: var(--text-muted); }

.detail-hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.detail-gallery {
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  padding: 32px;
}

.detail-gallery-main {
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f8fafc;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

.detail-gallery-main img {
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
}

.detail-gallery-thumbs {
  display: flex;
  gap: 12px;
  overflow-x: auto;
}

.detail-gallery-thumb {
  width: 80px;
  height: 60px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  overflow: hidden;
  flex-shrink: 0;
  background: #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.detail-gallery-thumb img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.detail-gallery-thumb.active { border-color: var(--primary); }

.detail-info h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.detail-info .subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.detail-highlights {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: var(--bg-white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.highlight-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
  flex-shrink: 0;
}

.highlight-text h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.highlight-text p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.detail-scenarios {
  margin-bottom: 32px;
}

.detail-scenarios h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.scenario-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.scenario-tag {
  padding: 8px 16px;
  background: #ecfdf5;
  color: #047857;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
}

/* ========== 参数表格 ========== */
.specs-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 80px;
}

.specs-section h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
}

.specs-table-wrap {
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
}

.specs-table th,
.specs-table td {
  padding: 16px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.specs-table th {
  background: #f8fafc;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  width: 240px;
}

.specs-table td {
  font-size: 0.95rem;
  color: var(--text-main);
}

.specs-table tr:last-child th,
.specs-table tr:last-child td {
  border-bottom: none;
}

.specs-table tr:hover td { background: #f8fafc; }

/* ========== 案例展示 ========== */
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 24px;
}

.case-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.3s;
}

.case-card:hover { box-shadow: var(--shadow-lg); }

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

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

.case-card:hover .case-card-img img { transform: scale(1.05); }

.case-card-body { padding: 24px; }

.case-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.case-card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ========== 关于我们 ========== */
.about-hero {
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  padding: 120px 24px 80px;
  text-align: center;
}

.about-hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.about-hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
  white-space: nowrap;
}

.about-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 24px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
}

.about-grid.reverse { direction: rtl; }
.about-grid.reverse > * { direction: ltr; }

.about-grid img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.about-grid h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.about-grid p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* 荣誉资质 */
.cert-grid {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding-bottom: 16px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.cert-grid::-webkit-scrollbar {
  height: 6px;
}

.cert-grid::-webkit-scrollbar-track {
  background: #f1f5f9;
  border-radius: 3px;
}

.cert-grid::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 3px;
}

.cert-item {
  background: var(--bg-white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  padding: 16px;
  text-align: center;
  transition: all 0.2s;
  flex: 0 0 auto;
  width: 200px;
  scroll-snap-align: start;
}

.cert-item:hover { box-shadow: var(--shadow); }

.cert-item img {
  width: 100%;
  height: 140px;
  object-fit: contain;
  margin-bottom: 12px;
}

.cert-item p {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* 荣誉资质文字列表 */
.honor-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px 40px;
}

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

.honor-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.honor-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.honor-en {
  font-size: 0.8rem;
  color: var(--text-light);
  line-height: 1.4;
}

/* 生态合作伙伴 */
.partners-wall {
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.partners-wall img {
  width: 100%;
  height: auto;
  display: block;
}

/* 统计数据 */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 80px;
}

.stat-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* ========== 联系我们 ========== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 24px 80px;
}

.contact-info h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.contact-info > p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-item-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.contact-form {
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 32px;
}

.contact-map {
  margin-top: 20px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}

.contact-map iframe {
  display: block;
  width: 100%;
}

.copy-hint {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--primary);
  margin-left: 4px;
}

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: inherit;
  background: var(--bg-white);
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-group textarea { resize: vertical; min-height: 120px; }

/* ========== 页脚 ========== */
.footer {
  background: var(--text-main);
  color: #9ca3af;
  padding: 48px 24px 24px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 32px;
}

.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand .logo img { height: 92px; }

.footer-brand p { font-size: 0.9rem; line-height: 1.7; }

.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 10px;
  transition: color 0.2s;
}

.footer-col a:hover { color: #fff; }

.footer-bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid #374151;
  font-size: 0.85rem;
  text-align: center;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .hero-inner,
  .detail-hero,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .about-grid.reverse { direction: ltr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav { display: none; }
  .mobile-menu-btn { display: block; }
  .hero-text h1 { font-size: 2.25rem; }
  .section-title { font-size: 1.75rem; }
  .stats-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .detail-hero { padding-top: 24px; }
  .specs-table th { width: 140px; }
}

/* 动画 */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* ========== 企业文化 ========== */
.culture-tabs {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.culture-tab {
  padding: 14px 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-white);
  border: 1.5px solid var(--border);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all 0.3s;
  font-family: inherit;
}

.culture-tab:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.culture-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.culture-panel {
  display: none;
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.culture-panel.active {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.culture-text {
  padding: 56px 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.culture-text .en-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}

.culture-text h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.3;
}

.culture-text p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.culture-img {
  min-height: 380px;
  background: #f1f5f9;
  overflow: hidden;
}

.culture-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s;
}

.culture-panel:hover .culture-img img {
  transform: scale(1.03);
}

/* ========== 发展历程时间轴 ========== */
.timeline-wrap {
  max-width: 900px;
  margin: 0 auto;
}

.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--primary) 50%, var(--primary-light) 100%);
}

.timeline-item {
  position: relative;
  padding-bottom: 48px;
}

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

.timeline-dot {
  position: absolute;
  left: -34px;
  top: 4px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-white);
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 4px var(--primary-light);
  z-index: 2;
}

.timeline-content {
  background: var(--bg-white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
}

.timeline-content:hover {
  box-shadow: var(--shadow);
  border-color: var(--primary-light);
}

.timeline-year {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.timeline-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}

.timeline-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 响应式 */
@media (max-width: 768px) {
  .culture-panel.active {
    grid-template-columns: 1fr;
  }
  .culture-text {
    padding: 32px 24px;
  }
  .culture-img {
    min-height: 240px;
  }
  .timeline {
    padding-left: 32px;
  }
  .timeline-dot {
    left: -28px;
    width: 18px;
    height: 18px;
  }
}

/* ========== 产品页CTA ========== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  text-align: center;
  border-radius: var(--radius);
}

.cta-inner {
  padding: 64px 24px;
}

.cta-section h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-section p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* 产品轮播 */
.product-carousel {
  position: relative;
  width: 100%;
  height: 420px;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  margin-bottom: 48px;
}

.carousel-track {
  position: relative;
  width: 100%;
  height: 100%;
}

.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.5s ease;
  display: flex;
  align-items: center;
  padding: 32px 64px;
  gap: 40px;
  text-decoration: none;
  color: inherit;
}

.carousel-slide.active {
  opacity: 1;
  z-index: 1;
}

.carousel-img {
  flex: 1.2;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
}

.carousel-img img {
  max-height: 90%;
  max-width: 100%;
  object-fit: contain;
}

.carousel-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.carousel-series {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
  width: fit-content;
}

.carousel-name {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.carousel-tagline {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.5;
}

.carousel-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.carousel-tags .tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 500;
  background: #f1f5f9;
  color: var(--text-secondary);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 1.4rem;
  cursor: pointer;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}

.carousel-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.carousel-prev { left: 12px; }
.carousel-next { right: 12px; }

.carousel-dots {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 2;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  background: #cbd5e1;
  cursor: pointer;
  transition: all 0.3s;
  padding: 0;
}

.carousel-dot.active {
  background: var(--primary);
  width: 24px;
  border-radius: 4px;
}

@media (max-width: 768px) {
  .product-carousel {
    height: auto;
    min-height: 480px;
  }
  .carousel-slide {
    flex-direction: column;
    padding: 24px 48px 48px;
    gap: 16px;
  }
  .carousel-img {
    flex: none;
    height: 220px;
    width: 100%;
  }
  .carousel-name {
    font-size: 1.3rem;
  }
}

.cta-series {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.cta-series-card {
  padding: 12px 28px;
  background: rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s;
  border: 1px solid rgba(255,255,255,0.2);
}

.cta-series-card:hover {
  background: rgba(255,255,255,0.25);
  transform: translateY(-2px);
}

/* 产品页CTA淡色版 */
.cta-section.cta-light {
  background: #ffffff;
  border: 1px solid var(--border);
}

.cta-section.cta-light h2 {
  color: var(--text-main);
}

.cta-section.cta-light p {
  color: var(--text-secondary);
  opacity: 1;
}

.cta-section.cta-light .cta-series-card {
  background: var(--bg-white);
  color: var(--primary);
  border: 1.5px solid var(--border);
}

.cta-section.cta-light .cta-series-card:hover {
  background: var(--primary-light);
  border-color: var(--primary);
}

/* 产品子型号分组 */
.product-subgroup {
  margin-bottom: 32px;
}

.product-subgroup:last-child {
  margin-bottom: 0;
}

.subgroup-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 16px;
  padding-left: 4px;
}

/* ========== 右侧悬浮导航栏 ========== */
.floating-sidebar {
  position: fixed;
  right: 20px;
  bottom: 120px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.float-btn {
  position: relative;
  width: 64px;
  padding: 10px 0 8px;
  border-radius: 12px;
  background: var(--bg-white);
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
  border: none;
  font-size: 0.7rem;
  line-height: 1.2;
}

.float-btn svg {
  width: 22px;
  height: 22px;
  stroke-width: 1.8;
}

.float-btn:hover {
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.15);
}

.float-wechat .qrcode-popup {
  position: absolute;
  right: 76px;
  bottom: 0;
  width: 160px;
  background: var(--bg-white);
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  padding: 12px;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s;
  pointer-events: none;
}

.float-wechat:hover .qrcode-popup {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.float-phone .phone-popup {
  position: absolute;
  right: 76px;
  bottom: 0;
  background: var(--bg-white);
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  padding: 12px 16px;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s;
  pointer-events: none;
  white-space: nowrap;
}

.float-phone:hover .phone-popup {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.phone-popup p {
  font-size: 0.85rem;
  color: var(--primary);
  font-weight: 600;
  margin: 0;
}

.qrcode-popup img {
  width: 100%;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.qrcode-popup p {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin: 0;
}

@media (max-width: 768px) {
  .floating-sidebar {
    right: 12px;
    bottom: 80px;
  }
  .float-btn {
    width: 56px;
    padding: 8px 0 6px;
    font-size: 0.65rem;
  }
  .float-btn svg {
    width: 18px;
    height: 18px;
  }
}