/* ============================================================
   北扶生物医疗 企业官网 — 全局样式
   风格：洁净专业医疗白（参考 Medtronic/Abbott）
   ============================================================ */

/* ── CSS 变量 ─────────────────────────────────────────────── */
:root {
  --brand:        #00A199;
  --brand-hover:  #008f88;
  --brand-light:  #e6f7f6;
  --brand-border: #b2e4e1;

  --text-primary:   #1a2332;
  --text-secondary: #6b7a8d;
  --text-muted:     #8899a6;
  --text-white:     #ffffff;

  --bg-white:  #ffffff;
  --bg-gray:   #fafbfc;
  --border:    #f0f2f5;

  --shadow-sm: 0 2px 10px rgba(0,0,0,0.04);
  --shadow-md: 0 6px 20px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.08);

  --font: 'PingFang SC', 'Microsoft YaHei', 'Inter', sans-serif;
  --nav-height: 72px;
  --max-width: 1200px;
  --section-padding: 80px 0;
}

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 15px; }
body {
  font-family: var(--font);
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); }

/* ── 布局容器 ─────────────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* ── 通用 Section ─────────────────────────────────────────── */
.section { padding: var(--section-padding); }
.section-white  { background: var(--bg-white); }
.section-gray   { background: var(--bg-gray); }
.section-brand  { background: var(--brand); }
.section-mint   { background: linear-gradient(135deg, #e6f7f6 0%, #f0faf9 100%); }

.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-header h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}
.section-header p {
  margin-top: 12px;
  font-size: 15px;
  color: var(--text-secondary);
}

/* ── 按钮 ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 13px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s ease;
}
.btn-primary {
  background: var(--brand);
  color: #fff;
}
.btn-primary:hover {
  background: var(--brand-hover);
  box-shadow: 0 4px 16px rgba(0,161,153,0.30);
  transform: translateY(-1px);
}
.btn-outline {
  border: 2px solid var(--brand);
  color: var(--brand);
  background: transparent;
}
.btn-outline:hover {
  background: var(--brand-light);
}
.btn-white {
  background: #fff;
  color: var(--brand);
}
.btn-white:hover {
  background: var(--brand-light);
}

/* ── 标签 ─────────────────────────────────────────────────── */
.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--brand-border);
  color: var(--brand);
  background: var(--brand-light);
}
.tag-category {
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
}
.tag-policy    { background: #fff3e0; color: #e65100; }
.tag-research  { background: #e8f5e9; color: #2e7d32; }
.tag-tech      { background: #e3f2fd; color: #1565c0; }
.tag-all       { background: var(--brand-light); color: var(--brand); }

/* ═══════════════════════════════════════════════════════════
   导航栏
   ═══════════════════════════════════════════════════════════ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(255,255,255,0.95);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.2s ease, backdrop-filter 0.2s ease;
}
.navbar.scrolled {
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}
.navbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.nav-logo img {
  height: 40px;
  width: auto;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}
.nav-links a {
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--brand);
  background: var(--brand-light);
}
.lang-toggle {
  flex-shrink: 0;
  padding: 6px 16px;
  border: 1.5px solid var(--brand-border);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand);
  background: transparent;
  transition: all 0.2s;
}
.lang-toggle:hover {
  background: var(--brand-light);
}
.hamburger {
  display: none;
  font-size: 22px;
  color: var(--text-primary);
  padding: 6px;
  margin-left: auto;
}
.nav-mobile-menu {
  display: none;
  flex-direction: column;
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 8px 24px 16px;
}
.nav-mobile-menu a {
  padding: 12px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
}
.nav-mobile-menu a:last-child { border-bottom: none; }
.nav-mobile-menu.open { display: flex; }

/* ═══════════════════════════════════════════════════════════
   Hero 区
   ═══════════════════════════════════════════════════════════ */
.hero {
  padding: 80px 0 72px;
  background: var(--bg-white);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 88px;
  align-items: center;
}
.hero-text { }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: var(--brand-light);
  border: 1px solid var(--brand-border);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand);
  margin-bottom: 20px;
}
.hero-title {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.hero-title span { color: var(--brand); }
.hero-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
}
.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-devices {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 12px;
  padding-bottom: 8px;
}
.device-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 30px 24px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  flex: 1;
  max-width: 170px;
}
.device-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.device-card.featured {
  transform: scale(1.07) translateY(-10px);
  box-shadow: var(--shadow-lg);
  background: #fff;
  border-color: var(--brand-border);
}
.device-card.featured:hover {
  transform: scale(1.07) translateY(-14px);
}
.device-card img {
  height: 120px;
  width: auto;
  margin: 0 auto 12px;
  object-fit: contain;
  filter: drop-shadow(0 6px 18px rgba(0,0,0,0.12));
}
.device-card .device-color {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

/* ═══════════════════════════════════════════════════════════
   信任栏
   ═══════════════════════════════════════════════════════════ */
.trust-bar {
  padding: 28px 0;
  background: var(--bg-gray);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.trust-items {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 32px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}
.trust-item:not(:last-child) {
  border-right: 1px solid var(--border);
}
.trust-icon {
  font-size: 20px;
}

/* ═══════════════════════════════════════════════════════════
   核心技术
   ═══════════════════════════════════════════════════════════ */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.tech-card {
  padding: 32px 28px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}
.tech-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.tech-icon {
  width: 52px;
  height: 52px;
  background: var(--brand-light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 20px;
}
.tech-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.tech-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ═══════════════════════════════════════════════════════════
   产品卡片
   ═══════════════════════════════════════════════════════════ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.product-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.product-img-wrap {
  background: #ffffff;
  padding: 0px;
  text-align: center;
  height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-img-wrap img {
  height: 208px;
  width: auto;
  margin: 0 auto;
  object-fit: contain;
  filter: drop-shadow(0 6px 20px rgba(0,0,0,0.10));
  transition: transform 0.3s ease, filter 0.3s ease;
}
.product-card:hover .product-img-wrap img {
  transform: scale(1.04) translateY(-4px);
  filter: drop-shadow(0 10px 28px rgba(0,0,0,0.15));
}
.product-body { padding: 24px; }
.product-body h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.product-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}
.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}
.product-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--brand);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s;
}
.product-link:hover { gap: 8px; }

/* ── 产品详情页（products.html）额外样式 ─────────────────── */
.product-section {
  padding: 72px 0;
  border-bottom: 1px solid var(--border);
}
.product-section:last-of-type { border-bottom: none; }
.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.product-detail-grid.reverse { direction: rtl; }
.product-detail-grid.reverse > * { direction: ltr; }

.product-gallery { }
.product-main-img {
  background: #f8fafb;
  border-radius: 16px;
  padding: 36px;
  text-align: center;
  margin-bottom: 12px;
}
.product-main-img img {
  height: 260px;
  margin: 0 auto;
  object-fit: contain;
  filter: drop-shadow(0 8px 24px rgba(0,0,0,0.10));
  transition: opacity 0.25s ease;
}
.product-thumbs {
  display: flex;
  gap: 8px;
  justify-content: center;
}
.product-thumb {
  width: 64px;
  height: 64px;
  background: var(--bg-gray);
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 6px;
  cursor: pointer;
  transition: border-color 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-thumb:hover,
.product-thumb.active { border-color: var(--brand); }
.product-thumb img {
  height: 46px;
  width: auto;
  object-fit: contain;
}

.product-info h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
}
.product-info .product-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}
.product-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}
.product-params-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 28px;
  font-size: 14px;
}
.product-params-table th,
.product-params-table td {
  padding: 11px 14px;
  border: 1px solid var(--border);
  text-align: left;
}
.product-params-table th {
  background: var(--bg-gray);
  color: var(--text-secondary);
  font-weight: 600;
  width: 38%;
}
.product-params-table td { color: var(--text-primary); }
.product-params-table tr:hover td { background: var(--brand-light); }
.product-cta { display: flex; gap: 12px; flex-wrap: wrap; }

/* ═══════════════════════════════════════════════════════════
   数据荣誉
   ═══════════════════════════════════════════════════════════ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.stat-item {
  background: var(--bg-white);
  padding: 40px 32px;
  text-align: center;
}
.stat-number {
  font-size: 44px;
  font-weight: 800;
  color: var(--brand);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -1px;
}
.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  white-space: pre-line;
}

/* ═══════════════════════════════════════════════════════════
   行业动态
   ═══════════════════════════════════════════════════════════ */
/* Tab 筛选 */
.news-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.news-tab {
  padding: 8px 20px;
  border-radius: 24px;
  font-size: 14px;
  font-weight: 500;
  border: 1.5px solid var(--border);
  color: var(--text-secondary);
  background: var(--bg-white);
  transition: all 0.2s;
}
.news-tab:hover,
.news-tab.active {
  border-color: var(--brand);
  color: var(--brand);
  background: var(--brand-light);
}

/* 文章卡片 */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.news-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.news-card-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.news-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.news-card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card-summary {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}
.news-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
}
.news-card-read-more {
  font-size: 13px;
  font-weight: 600;
  color: var(--brand);
}

/* 行业动态详情页 */
.news-detail-wrap {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px 32px;
}
.news-breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.news-breadcrumb a { color: var(--brand); }
.news-detail-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 16px;
}
.news-detail-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.news-detail-content {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-primary);
}
.news-detail-content p { margin-bottom: 18px; }
.news-detail-content h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 28px 0 14px;
}
.news-source-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 32px;
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  transition: border-color 0.2s, color 0.2s;
}
.news-source-link:hover { border-color: var(--brand); color: var(--brand); }

.related-news { margin-top: 60px; padding-top: 36px; border-top: 1px solid var(--border); }
.related-news h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
}
.related-news-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.related-news-card {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.related-news-card:hover { border-color: var(--brand); box-shadow: var(--shadow-sm); }
.related-news-card h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-news-card span { font-size: 12px; color: var(--text-muted); }

/* 加载更多 */
.load-more-wrap { text-align: center; margin-top: 40px; }
.chinese-only-notice {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
  font-size: 15px;
}

/* ═══════════════════════════════════════════════════════════
   获客区（QR 码）
   ═══════════════════════════════════════════════════════════ */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, #e6f7f6 0%, #f0faf9 100%);
}
.cta-inner {
  text-align: center;
  margin-bottom: 48px;
}
.cta-inner h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.cta-inner p {
  font-size: 16px;
  color: var(--text-secondary);
}
.qr-grid {
  display: flex;
  justify-content: center;
  gap: 64px;
  flex-wrap: wrap;
}
.qr-item { text-align: center; }
.qr-item img {
  width: 140px;
  height: 140px;
  object-fit: contain;
  border-radius: 12px;
  border: 3px solid #fff;
  box-shadow: var(--shadow-md);
  margin: 0 auto 14px;
}
.qr-item h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.qr-item p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ═══════════════════════════════════════════════════════════
   关于我们
   ═══════════════════════════════════════════════════════════ */
.about-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-intro-text h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.about-intro-text p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}
.about-vision {
  padding: 40px;
  background: var(--brand-light);
  border-left: 4px solid var(--brand);
  border-radius: 0 12px 12px 0;
}
.about-vision p {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.6;
  margin-bottom: 8px;
}
.about-vision span { font-size: 14px; color: var(--text-secondary); }

.honor-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.honor-item {
  padding: 28px 24px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: center;
}
.honor-icon { font-size: 32px; margin-bottom: 12px; }
.honor-item h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.honor-item p { font-size: 13px; color: var(--text-secondary); }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.contact-item {
  padding: 28px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.contact-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.contact-value {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

/* ═══════════════════════════════════════════════════════════
   页面 Hero（内页通用）
   ═══════════════════════════════════════════════════════════ */
.page-hero {
  background: linear-gradient(135deg, #00b8af 0%, var(--brand) 60%, var(--brand-hover) 100%);
  padding: 64px 0;
  text-align: center;
  color: #fff;
}
.page-hero h1 {
  font-size: 38px;
  font-weight: 800;
  margin-bottom: 12px;
}
.page-hero p {
  font-size: 16px;
  opacity: 0.85;
}

/* ═══════════════════════════════════════════════════════════
   页脚
   ═══════════════════════════════════════════════════════════ */
.footer {
  background: #0f1c2e;
  color: rgba(255,255,255,0.7);
  padding: 56px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand h3 {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.footer-brand p {
  font-size: 13px;
  line-height: 1.8;
}
.footer-brand .brand-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  background: var(--brand);
  border-radius: 3px;
  margin-right: 8px;
  vertical-align: middle;
}
.footer-nav h4,
.footer-contact h4 {
  font-size: 13px;
  font-weight: 700;
  color: rgba(255,255,255,0.4);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.footer-nav ul { display: flex; flex-direction: column; gap: 8px; }
.footer-nav a {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  transition: color 0.2s;
}
.footer-nav a:hover { color: var(--brand); }
.footer-contact-item {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 14px;
}
.footer-contact-item span:first-child {
  color: rgba(255,255,255,0.4);
  flex-shrink: 0;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--brand); }

/* ═══════════════════════════════════════════════════════════
   响应式：平板（≤ 1024px）
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .hero-title { font-size: 38px; }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .product-detail-grid { gap: 40px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .honor-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

/* ═══════════════════════════════════════════════════════════
   响应式：平板（≤ 768px）
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  :root { --section-padding: 56px 0; }
  .container { padding: 0 20px; }

  /* 导航 */
  .nav-links { display: none; }
  .hamburger { display: block; }
  .lang-toggle { padding: 4px 12px; font-size: 12px; }

  /* Hero */
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-devices { order: -1; }
  .hero-title { font-size: 32px; }
  .hero-cta { justify-content: center; }
  .hero-text { text-align: center; }

  /* 信任栏 */
  .trust-items { flex-direction: column; gap: 12px; }
  .trust-item { border-right: none !important; border-bottom: 1px solid var(--border); padding: 0 0 12px; width: 100%; justify-content: center; }
  .trust-item:last-child { border-bottom: none; padding-bottom: 0; }

  /* 网格 */
  .tech-grid        { grid-template-columns: 1fr; }
  .product-grid     { grid-template-columns: 1fr; }
  .news-grid        { grid-template-columns: 1fr; }
  .product-detail-grid { grid-template-columns: 1fr; }
  .product-detail-grid.reverse { direction: ltr; }
  .about-intro-grid { grid-template-columns: 1fr; }
  .contact-grid     { grid-template-columns: 1fr; }
  .related-news-grid{ grid-template-columns: 1fr; }
  .honor-grid       { grid-template-columns: 1fr; }
  .footer-grid      { grid-template-columns: 1fr; gap: 32px; }

  /* 数据 */
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-number { font-size: 36px; }

  /* 页面 Hero */
  .page-hero h1 { font-size: 28px; }

  /* 详情页 */
  .news-detail-wrap { padding: 40px 20px; }
  .news-detail-title { font-size: 22px; }

  /* 页脚 */
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ═══════════════════════════════════════════════════════════
   响应式：手机（≤ 480px）
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
  .hero-title { font-size: 26px; }
  .section-header h2 { font-size: 24px; }
  .hero-devices { gap: 8px; }
  .device-card { max-width: 110px; padding: 0px 0px; }
  .device-card img { height: 90px; }
  .device-card.featured { transform: scale(1.05) translateY(-6px); }
  .qr-grid { gap: 40px; }
  .stat-number { font-size: 32px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .btn { padding: 11px 22px; font-size: 14px; }
  .news-tabs { gap: 6px; }
  .news-tab { padding: 6px 14px; font-size: 13px; }
}

/* ═══════════════════════════════════════════════════════════
   工具类
   ═══════════════════════════════════════════════════════════ */
.text-center { text-align: center; }
.text-brand  { color: var(--brand); }
.mt-4  { margin-top: 16px; }
.mt-8  { margin-top: 32px; }
.mb-4  { margin-bottom: 16px; }
.mb-8  { margin-bottom: 32px; }
.hidden { display: none !important; }