/* ============================================
   苏州博莱尼传感技术有限公司 - 官网公共样式
   品牌色：深蓝 #003b91 | 强调红 #e60012
   ============================================ */

:root {
  --primary: #003b91;
  --primary-dark: #002a6a;
  --primary-light: #1a54b8;
  --accent: #e60012;
  --accent-dark: #c4000f;
  --accent-light: #ff1a2e;
  --bg-white: #ffffff;
  --bg-gray: #f5f7fa;
  --bg-dark: #0a1628;
  --bg-darker: #061020;
  --text-primary: #1a1a2e;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --text-light: #a0aec0;
  --border-light: #e2e8f0;
  --border-medium: #cbd5e0;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 59, 145, 0.1);
  --shadow-lg: 0 12px 40px rgba(0, 59, 145, 0.15);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container: 1280px;
  --nav-height: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  outline: none;
}

/* ===== Container ===== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

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

.navbar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.navbar-nav {
  margin-left: auto;
}

.lang-switcher {
  margin-left: 24px;
}

.navbar-logo {
  display: flex;
  align-items: center;
  height: 27px;
}

.navbar-logo img {
  height: 27px;
  width: auto;
  object-fit: contain;
}

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

.navbar-nav a {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  position: relative;
}

.navbar-nav a:hover {
  color: var(--primary);
}

.navbar-nav a.active {
  color: var(--primary);
  font-weight: 600;
}

.navbar-nav a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

.navbar-nav .navbar-divider {
  width: 1px;
  height: 20px;
  background: var(--border-medium);
  margin: 0 10px;
}

.navbar-nav a.navbar-lang {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 30px;
  padding: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  letter-spacing: 0.5px;
}

.navbar-nav a.navbar-lang:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(0, 59, 145, 0.05);
}

/* ===== Mobile Nav Toggle (Hamburger) ===== */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1100;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2.5px;
  border-radius: 2px;
  background: var(--primary);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ===== Sidebar (Fixed Right) ===== */
.sidebar-tools {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-item {
  width: 56px;
  height: 56px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.sidebar-item:hover {
  background: var(--primary);
  color: #fff;
  transform: translateX(-2px);
}

.sidebar-item svg {
  width: 22px;
  height: 22px;
  margin-bottom: 2px;
}

.sidebar-item span {
  font-size: 11px;
  line-height: 1;
}

.sidebar-item .sidebar-tooltip {
  position: absolute;
  right: 64px;
  top: 50%;
  transform: translateY(-50%);
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 12px;
  width: 140px;
  text-align: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  white-space: normal;
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.sidebar-item:hover .sidebar-tooltip {
  opacity: 1;
  visibility: visible;
  right: 68px;
}

.sidebar-item .sidebar-tooltip .qr-placeholder {
  width: 116px;
  height: 116px;
  background: var(--bg-gray);
  border: 1px dashed var(--border-medium);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
  color: var(--text-muted);
  font-size: 12px;
}

.back-to-top {
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

/* ===== Footer 移动端社交条 ===== */
.footer-social-mobile {
  display: none;
  justify-content: center;
  align-items: center;
  gap: 30px;
  padding: 20px 0 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-social-mobile .fs-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  padding: 4px 8px;
  color: #a0aec0;
  font-size: 12px;
  cursor: pointer;
  transition: color 0.3s ease;
}

.footer-social-mobile .fs-item svg {
  width: 22px;
  height: 22px;
}

.footer-social-mobile .fs-item:active {
  color: #ffffff;
}

/* ===== 移动端右下角返回顶部 ===== */
.mobile-back-top {
  display: none;
  position: fixed;
  right: 16px;
  bottom: 28px;
  z-index: 950;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(0, 59, 145, 0.35);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-back-top.visible {
  opacity: 1;
  visibility: visible;
}

.mobile-back-top svg {
  width: 20px;
  height: 20px;
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-dark);
  color: #a0aec0;
  padding: 60px 0 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-logo {
  height: 30px;
  margin-bottom: 20px;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}

.footer-desc {
  font-size: 13px;
  line-height: 1.8;
  color: #718096;
}

.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 13px;
  color: #718096;
}

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

.footer-contact-item {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 13px;
  line-height: 1.6;
  color: #718096;
}

.footer-contact-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 3px;
  color: #a0aec0;
}

.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 12px;
  color: #4a5568;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 59, 145, 0.3);
}

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

.btn-accent:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(230, 0, 18, 0.3);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

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

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

.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
}

/* ===== Section Common ===== */
.section {
  padding: 80px 0;
}

.section-gray {
  background: var(--bg-gray);
}

.section-dark {
  background: var(--bg-dark);
  color: #fff;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-subtitle {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-dark .section-title {
  color: #fff;
}

.section-desc {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.section-dark .section-desc {
  color: #a0aec0;
}

/* ===== Page Banner ===== */
.page-banner {
  height: 320px;
  background: linear-gradient(135deg, var(--bg-dark) 0%, #0f2744 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  margin-top: var(--nav-height);
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.page-banner-content {
  position: relative;
  text-align: center;
  color: #fff;
  z-index: 2;
}

.page-banner-title {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.page-banner-breadcrumb {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

.page-banner-breadcrumb a:hover {
  color: #fff;
}

.page-banner-breadcrumb .separator {
  margin: 0 8px;
}

.page-banner-breadcrumb .current {
  color: #fff;
}

/* ===== Product Card ===== */
.product-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

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

.product-card-img {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bg-gray);
}

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

.product-card:hover .product-card-img img {
  transform: none;
}

.product-card-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--accent);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 3px;
  letter-spacing: 0.5px;
}

.product-card-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-card-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.product-card-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.6;
  flex: 1;
}

.product-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.product-card-model {
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
  font-family: "SF Mono", Consolas, monospace;
}

.product-card-link {
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.product-card:hover .product-card-link {
  color: var(--accent);
}

/* ===== Doc Card ===== */
.doc-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.doc-item {
  display: flex;
  align-items: center;
  padding: 18px 24px;
  background: #fff;
  transition: var(--transition);
}

.doc-item:hover {
  background: var(--bg-gray);
}

.doc-icon {
  width: 44px;
  height: 44px;
  background: rgba(0, 59, 145, 0.08);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 16px;
  flex-shrink: 0;
  color: var(--primary);
}

.doc-icon svg {
  width: 22px;
  height: 22px;
}

.doc-info {
  flex: 1;
  min-width: 0;
}

.doc-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.doc-meta {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  gap: 16px;
}

.doc-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background: rgba(0, 59, 145, 0.06);
  flex-shrink: 0;
}

.doc-download:hover {
  background: var(--primary);
  color: #fff;
}

/* ===== Case Card ===== */
.case-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.case-card-img {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-gray);
}

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

.case-card:hover .case-card-img img {
  transform: none;
}

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

.case-card-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--accent);
  background: rgba(230, 0, 18, 0.08);
  padding: 4px 10px;
  border-radius: 3px;
  margin-bottom: 10px;
}

.case-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.case-card-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== Tabs ===== */
.tabs-nav {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
  border-radius: 30px;
  background: #fff;
  transition: var(--transition);
  cursor: pointer;
}

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

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

/* ===== Update Notice ===== */
.update-notice {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: rgba(0, 59, 145, 0.04);
  border: 1px solid rgba(0, 59, 145, 0.1);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-secondary);
}

.update-notice svg {
  width: 18px;
  height: 18px;
  color: var(--primary);
  flex-shrink: 0;
}

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

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 28px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .navbar-inner {
    padding: 0 20px;
  }

  /* 移动端 logo 缩小到 60% */
  .navbar-logo {
    height: 16px;
  }

  .navbar-logo img {
    height: 16px;
  }

  /* 移动端折叠菜单 */
  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  /* 移动端语言切换器靠右 */
  .lang-switcher { display: inline-block; margin-left: 8px; margin-right: 0; }
  .lang-globe-btn { padding: 2px 8px 2px 2px; font-size: 12px; }
  .lang-globe-wrap { width: 22px; height: 22px; }
  .lang-globe { width: 14px; height: 14px; }

  .navbar-nav {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #ffffff;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
    padding: 8px 0 12px;
    z-index: 1050;
  }

  .navbar-nav.open {
    display: flex;
  }

  .navbar-nav a {
    padding: 14px 24px;
    border-radius: 0;
    font-size: 15px;
  }

  .navbar-nav a.active::after {
    bottom: 8px;
    left: 24px;
    transform: none;
    width: 18px;
  }

  .navbar-nav .navbar-divider {
    display: none;
  }

  .navbar-nav a.navbar-lang {
    width: auto;
    height: 38px;
    margin: 8px 24px 4px;
    padding: 0 20px;
  }

  .sidebar-tools {
    display: none;
  }

  .footer-social-mobile {
    display: flex;
  }

  .mobile-back-top {
    display: flex;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* 移动端 footer logo 缩小到 65% */
  .footer-logo {
    height: 19px;
  }

  .page-banner {
    height: 240px;
  }

  .page-banner-title {
    font-size: 30px;
  }

  .section {
    padding: 48px 0;
  }

  .section-title {
    font-size: 24px;
  }
}

/* ===== 演示到期弹窗 ===== */
.demo-expire-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  padding: 20px;
  box-sizing: border-box;
}

.demo-expire-modal {
  background: #fff;
  border-radius: 12px;
  padding: 36px 32px 28px;
  max-width: 460px;
  width: 100%;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: demoExpireFadeIn 0.25s ease;
}

@keyframes demoExpireFadeIn {
  from { opacity: 0; transform: translateY(-12px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.demo-expire-text {
  font-size: 15px;
  line-height: 1.8;
  color: #333;
  margin-bottom: 24px;
}

.demo-expire-btn {
  display: inline-block;
  padding: 12px 40px;
  background: #003b91;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.demo-expire-btn:hover {
  background: #002d70;
}

/* ===== 开发中提示弹窗 ===== */
.dev-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  padding: 20px;
  box-sizing: border-box;
}
.dev-modal {
  background: #fff;
  border-radius: 12px;
  padding: 36px 32px 28px;
  max-width: 420px;
  width: 100%;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: devModalFadeIn 0.25s ease;
}
@keyframes devModalFadeIn {
  from { opacity: 0; transform: translateY(-12px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.dev-modal-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: #e8f0fe;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #003b91;
  font-size: 28px;
}
.dev-modal-text {
  font-size: 16px;
  line-height: 1.8;
  color: #333;
  margin-bottom: 24px;
}
.dev-modal-btn {
  display: inline-block;
  padding: 12px 48px;
  background: #003b91;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.dev-modal-btn:hover {
  background: #002d70;
}

/* ===== Language Switcher (Globe + Dropdown) ===== */
.lang-switcher { position: relative; display: inline-block; }
.lang-globe-btn {
  display: flex; align-items: center; gap: 6px;
  background: #fff; border: 1px solid #d8dde6; border-radius: 22px;
  padding: 3px 12px 3px 3px; cursor: pointer;
  color: #333; font-size: 14px; font-weight: 600;
  transition: all 0.2s;
}
.lang-globe-btn:hover { border-color: #003b91; box-shadow: 0 2px 8px rgba(0,59,145,0.12); }
.lang-globe-wrap {
  width: 26px; height: 26px; border-radius: 50%;
  background: #2c3e50; display: flex; align-items: center; justify-content: center;
  color: #fff; perspective: 300px; flex-shrink: 0;
}
.lang-globe {
  width: 17px; height: 17px;
  animation: globeSpin 10s linear infinite;
  transform-style: preserve-3d;
}
.lang-globe-btn:hover .lang-globe { animation-duration: 3s; }
@keyframes globeSpin {
  from { transform: rotateY(0deg); }
  to { transform: rotateY(360deg); }
}
.lang-current { min-width: 18px; text-align: center; line-height: 1; }
.lang-arrow { font-size: 9px; color: #888; transition: transform 0.25s; line-height: 1; }
.lang-switcher.open .lang-arrow { transform: rotate(180deg); }
.lang-dropdown {
  position: absolute; top: calc(100% + 8px); right: 0;
  background: #fff; border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.14);
  min-width: 210px; padding: 6px 0;
  opacity: 0; visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.25s ease;
  z-index: 1000; overflow: hidden;
}
.lang-switcher.open .lang-dropdown {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.lang-dropdown a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 18px; font-size: 14px;
  color: #444; text-decoration: none;
  transition: all 0.15s;
}
.lang-dropdown a:hover { background: #f0f5fc; color: #003b91; }
.lang-dropdown a.active { background: #e8f0fe; color: #003b91; }
.lang-code { font-weight: 700; font-size: 15px; }
.lang-name { color: #999; font-size: 13px; font-weight: 400; }
.lang-dropdown a.active .lang-name { color: #003b91; }
/* ===== 统一页面Banner（背景图+蓝色遮罩+居中文字） ===== */
.page-hero {
  position: relative;
  height: 380px;
  padding-top: 72px;
  box-sizing: border-box;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  overflow: hidden;
}
.page-hero-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, rgba(0,59,145,0.88) 0%, rgba(0,45,112,0.78) 50%, rgba(0,30,80,0.85) 100%);
}
.page-hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 0 20px;
}
.page-hero h1 {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 2px;
}
.page-hero p {
  font-size: 16px;
  opacity: 0.92;
  line-height: 1.8;
  margin: 0;
}
@media (max-width: 768px) {
  .page-hero { height: 290px; padding-top: 60px; }
  .page-hero h1 { font-size: 28px; }
  .page-hero p { font-size: 14px; }
}

/* ===== 产品目录页（对标网站风格） ===== */
.catalog-nav-section {
  padding: 50px 0 30px;
  background: #fff;
}
.catalog-nav-title {
  font-size: 32px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 24px;
}
.catalog-nav-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.catalog-tab {
  padding: 12px 28px;
  border: 1px solid #e0e0e0;
  background: #f8f9fa;
  border-radius: 6px;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.3s;
  color: #333;
}
.catalog-tab::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #999;
  margin-right: 8px;
  vertical-align: middle;
}
.catalog-tab.active {
  background: #003b91;
  color: #fff;
  border-color: #003b91;
}
.catalog-tab.active::before {
  background: #fff;
}
.catalog-products-section {
  padding: 30px 0 60px;
  background: #f5f7fa;
}
.catalog-product-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.catalog-product-card {
  display: flex;
  flex-direction: row;
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: transform 0.3s, box-shadow 0.3s;
}
.catalog-product-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.1);
}
.catalog-product-info {
  flex: 1;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.catalog-product-model {
  font-size: 22px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 8px;
}
.catalog-product-name {
  font-size: 18px;
  color: #003b91;
  margin-bottom: 12px;
  font-weight: 600;
}
.catalog-product-desc {
  font-size: 14px;
  color: #666;
  line-height: 1.7;
  margin-bottom: 24px;
}
.catalog-product-btn {
  display: inline-block;
  padding: 10px 28px;
  background: #003b91;
  color: #fff;
  border-radius: 4px;
  font-size: 14px;
  text-decoration: none;
  align-self: flex-start;
  transition: background 0.3s;
}
.catalog-product-btn:hover { background: #0056b3; }
.catalog-product-img {
  width: 180px;
  flex-shrink: 0;
  background: #f8f9fa;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.catalog-product-img img {
  max-width: 100%;
  max-height: 140px;
  object-fit: contain;
}
.catalog-detail-section {
  padding: 60px 0;
  background: #fff;
}
.catalog-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}
.catalog-detail-item h3 {
  font-size: 20px;
  color: #003b91;
  margin-bottom: 16px;
  padding-left: 12px;
  border-left: 4px solid #e60012;
}
.catalog-detail-item p, .catalog-detail-item li {
  font-size: 14px;
  color: #555;
  line-height: 1.8;
}
.catalog-detail-item ul { padding-left: 20px; }
@media (max-width: 768px) {
  .catalog-product-list { grid-template-columns: 1fr; }
  .catalog-product-card { flex-direction: column; }
  .catalog-product-img { width: 100%; height: 200px; }
  .catalog-detail-grid { grid-template-columns: 1fr; }
}

/* ============================================
   首页区块样式（对齐静态原型）
   ============================================ */
/* 四大产品线 */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.cat-card{display:block;background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-md);overflow:hidden;transition:var(--transition)}
.cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.cat-card-img{aspect-ratio:4/3;overflow:hidden;background:var(--bg-gray)}
.cat-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.cat-card:hover .cat-card-img img{transform:scale(1.05)}
.cat-card-body{padding:20px 22px;display:flex;align-items:center;justify-content:space-between}
.cat-card-body h3{font-size:17px;font-weight:600;color:var(--text-primary)}
.cat-card-more{font-size:13px;color:var(--primary);display:inline-flex;align-items:center;gap:6px}
.cat-card-more span{transition:transform .3s ease}
.cat-card:hover .cat-card-more span{transform:translateX(4px)}
@media(max-width:1024px){.cat-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.cat-grid{grid-template-columns:1fr}}

/* 通用四宫格优势 */
.advantages-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.advantage-card{padding:32px 24px;background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-md);text-align:center;transition:var(--transition)}
.advantage-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:transparent}
.advantage-icon{width:64px;height:64px;margin:0 auto 20px;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);border-radius:16px;display:flex;align-items:center;justify-content:center;color:#fff}
.advantage-icon svg{width:30px;height:30px}
.advantage-card h3{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:10px}
.advantage-card p{font-size:13px;color:var(--text-muted);line-height:1.7}
@media(max-width:1024px){.advantages-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.advantages-grid{grid-template-columns:1fr}}

/* 热门产品速览 */
.dual-lines{padding:80px 0;background:var(--bg-gray)}
.mini-product-title{font-size:20px;font-weight:600;color:var(--text-primary);margin-bottom:24px;padding-left:14px;border-left:4px solid var(--primary)}
.mini-product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.mini-product-card{display:block;background:#fff;border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--border-light);transition:var(--transition)}
.mini-product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.mp-img{aspect-ratio:1/0.9;overflow:hidden;background:var(--bg-gray)}
.mp-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.mini-product-card:hover .mp-img img{transform:scale(1.08)}
.mp-body{padding:16px 18px}
.mp-name{font-size:15px;font-weight:600;color:var(--text-primary);margin-bottom:4px}
.mp-model{font-size:12px;color:var(--primary);font-family:"SF Mono",Consolas,monospace;margin-bottom:6px}
.mp-desc{font-size:13px;color:var(--text-muted);line-height:1.6}
@media(max-width:1024px){.mini-product-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.mini-product-grid{grid-template-columns:1fr}}

/* 数据统计 */
.stats-section{background:linear-gradient(180deg,#ffffff 0%,#f2f6fc 100%);padding:80px 0;position:relative;overflow:hidden;border-top:1px solid var(--border-light);border-bottom:1px solid var(--border-light)}
.stats-wave{position:absolute;left:0;right:0;bottom:0;height:140px;z-index:1;pointer-events:none;overflow:hidden}
.stats-wave svg{width:200%;height:100%;display:block}
.stats-wave .wave-a{animation:waveFlowA 16s linear infinite}
.stats-wave .wave-b{animation:waveFlowB 24s linear infinite}
@keyframes waveFlowA{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@keyframes waveFlowB{from{transform:translateX(-50%)}to{transform:translateX(0)}}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:40px;position:relative;z-index:2}
.stat-item{text-align:center}
.stat-number{font-size:56px;font-weight:800;color:var(--primary);line-height:1;margin-bottom:12px}
.stat-number .stat-suffix{font-size:28px;font-weight:600;color:var(--accent)}
.stat-label{font-size:15px;color:var(--text-secondary);letter-spacing:1px}
@media(max-width:768px){.stats-grid{grid-template-columns:repeat(2,1fr);gap:32px}.stat-number{font-size:40px}}

/* CTA区块 */
.cta-section{padding:80px 0;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;top:-50%;right:-10%;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(230,0,18,.2) 0%,transparent 70%)}
.cta-content{position:relative;z-index:2;text-align:center;color:#fff}
.cta-title{font-size:36px;font-weight:700;margin-bottom:16px}
.cta-desc{font-size:16px;opacity:.85;margin-bottom:32px}
.cta-buttons{display:flex;gap:16px;justify-content:center}
.cta-buttons .btn-outline{background:transparent;border-color:rgba(255,255,255,.6);color:#fff}
.cta-buttons .btn-outline:hover{background:#fff;color:var(--primary)}
@media(max-width:768px){.cta-title{font-size:24px}.cta-buttons{flex-direction:column;align-items:center;gap:12px}.cta-buttons .btn{width:100%;max-width:300px}}

/* 新闻列表 */
.news-list{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{display:block;background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-md);overflow:hidden;transition:var(--transition)}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.news-img{aspect-ratio:16/9;overflow:hidden;background:var(--bg-gray)}
.news-img img{width:100%;height:100%;object-fit:cover}
.news-body{padding:18px 20px}
.news-date{font-size:12px;color:var(--text-muted);display:block;margin-bottom:8px}
.news-body h4{font-size:15px;font-weight:600;color:var(--text-primary);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
@media(max-width:1024px){.news-list{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.news-list{grid-template-columns:1fr}}

/* 返回顶部 */
.back-to-top{position:fixed;right:20px;bottom:20px;width:48px;height:48px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;z-index:900;opacity:0;visibility:hidden;transform:translateY(20px);transition:var(--transition);box-shadow:var(--shadow-lg)}
.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:var(--accent)}
.mobile-back-top{position:fixed;right:16px;bottom:16px;width:46px;height:46px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;z-index:900;opacity:0;visibility:hidden;transform:translateY(16px);transition:var(--transition);box-shadow:var(--shadow-lg)}
.mobile-back-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.mobile-back-top:hover{background:var(--accent)}

/* 产品轮播（对齐原型 .carousel-section） */
.carousel-section{padding:80px 0;background:var(--bg-gray)}
.carousel{position:relative;overflow:hidden;border-radius:var(--radius-md);box-shadow:var(--shadow-lg)}
.carousel-track{display:flex;transition:transform .6s cubic-bezier(.4,0,.2,1)}
.carousel-slide{flex:0 0 100%;position:relative;aspect-ratio:16/6;background:var(--bg-dark)}
.carousel-slide img{width:100%;height:100%;object-fit:cover;opacity:.6}
.carousel-slide-content{position:absolute;inset:0;display:flex;align-items:center;padding:60px}
.carousel-slide-text{max-width:500px;color:#fff}
.carousel-slide-tag{display:inline-block;padding:6px 14px;background:var(--accent);color:#fff;font-size:12px;font-weight:600;border-radius:3px;margin-bottom:16px;letter-spacing:1px}
.carousel-slide-title{font-size:36px;font-weight:700;margin-bottom:12px;line-height:1.3}
.carousel-slide-desc{font-size:15px;opacity:.85;margin-bottom:24px;line-height:1.7}
.carousel-btn{position:absolute;top:50%;transform:translateY(-50%);width:48px;height:48px;border-radius:50%;background:rgba(255,255,255,.15);backdrop-filter:blur(8px);color:#fff;display:flex;align-items:center;justify-content:center;transition:var(--transition);z-index:5;cursor:pointer}
.carousel-btn:hover{background:var(--accent)}
.carousel-btn svg{width:20px;height:20px}
.carousel-prev{left:24px}.carousel-next{right:24px}
.carousel-dots{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);display:flex;gap:8px;z-index:5}
.carousel-dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.4);transition:var(--transition);cursor:pointer;padding:0;border:none}
.carousel-dot.active{background:#fff;width:28px;border-radius:5px}
@media(max-width:768px){.carousel-slide{aspect-ratio:4/3}.carousel-slide-title{font-size:22px}.carousel-slide-content{padding:24px}.carousel-slide-desc{display:none}.carousel-section{padding:48px 0}}

/* 常见区块通用 */
.section{padding:80px 0}
.section.gray,.section-gray{background:var(--bg-gray)}
.section-header{text-align:center;max-width:720px;margin:0 auto 48px}
.section-kicker{display:inline-block;font-size:12px;letter-spacing:3px;color:var(--accent);font-weight:600;text-transform:uppercase;margin-bottom:12px}