/* ============================================================
   福建中科捷航科技有限公司 - 全站样式
   设计风格：参考 c-denkei 的简洁目录风 + 科技蓝主调
   主色：#0A4B8C 辅色：#29ABE2（logo 青）
   ============================================================ */

/* -------- 基础变量 -------- */
:root {
  --color-primary: #0A4B8C;
  --color-primary-dark: #073968;
  --color-primary-light: #1E6FB8;
  --color-accent: #29ABE2;
  --color-accent-dark: #1A8FC2;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7fa;
  --color-bg-section: #fafbfc;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-success: #10b981;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 2px 8px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,.10);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --container: 1200px;
  --transition: .25s ease;
}

/* -------- 基础重置 -------- */
*,*::before,*::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }
button { cursor: pointer; font-family: inherit; }

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

/* -------- 顶部导航 -------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  color: var(--color-primary);
  white-space: nowrap;
}
.nav-logo img { width: 40px; height: 40px; }
.nav-logo .name-en { display: block; font-size: 11px; font-weight: 400; color: var(--color-text-muted); letter-spacing: .5px; }
.nav-menu {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-menu a {
  display: block;
  padding: 8px 14px;
  color: var(--color-text);
  font-size: 15px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-primary);
  background: rgba(10,75,140,.06);
}
.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  padding: 8px;
  color: var(--color-primary);
}
.nav-toggle svg { width: 24px; height: 24px; }

/* -------- 页脚 -------- */
.site-footer {
  background: #1a2a3a;
  color: #cbd5e1;
  padding: 48px 0 0;
  margin-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-col h4 {
  color: #ffffff;
  font-size: 15px;
  margin: 0 0 16px;
  font-weight: 600;
}
.footer-col p, .footer-col li {
  font-size: 13px;
  line-height: 1.9;
  color: #94a3b8;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li a { color: #94a3b8; }
.footer-col li a:hover { color: var(--color-accent); }
.footer-brand .logo-row { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-brand .logo-row img { width: 36px; height: 36px; }
.footer-brand .logo-row span { color: #ffffff; font-weight: 700; font-size: 15px; }
.footer-bottom {
  border-top: 1px solid #2c3e50;
  margin-top: 40px;
  padding: 18px 0;
  text-align: center;
  font-size: 12px;
  color: #64748b;
}

/* -------- 按钮 -------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition);
  border: 1px solid transparent;
  gap: 6px;
}
.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
}
.btn-primary:hover { background: var(--color-primary-dark); color: #ffffff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-accent {
  background: var(--color-accent);
  color: #ffffff;
}
.btn-accent:hover { background: var(--color-accent-dark); color: #ffffff; }
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary); color: #ffffff; }
.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}
.btn-ghost:hover { border-color: var(--color-primary); }

/* -------- 区块通用 -------- */
.section {
  padding: 64px 0;
}
.section-alt { background: var(--color-bg-section); }
.section-title {
  text-align: center;
  margin: 0 0 12px;
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
}
.section-subtitle {
  text-align: center;
  margin: 0 auto 40px;
  max-width: 720px;
  color: var(--color-text-muted);
  font-size: 15px;
}

/* -------- Hero 首页横幅 -------- */
.hero {
  background: linear-gradient(135deg, #0A4B8C 0%, #1E6FB8 50%, #29ABE2 100%);
  color: #ffffff;
  padding: 80px 0 90px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 40px 40px;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  align-items: center;
  gap: 48px;
}
.hero h1 {
  font-size: 38px;
  font-weight: 700;
  margin: 0 0 16px;
  line-height: 1.3;
}
.hero p {
  font-size: 16px;
  opacity: .9;
  margin: 0 0 32px;
  max-width: 540px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-actions .btn-accent { background: #ffffff; color: var(--color-primary); }
.hero-actions .btn-accent:hover { background: #f0f9ff; color: var(--color-primary); }
.hero-card {
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.20);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(10px);
}
.hero-card h3 { margin: 0 0 18px; font-size: 16px; font-weight: 500; opacity: .9; }
.hero-card ul { list-style: none; margin: 0; padding: 0; }
.hero-card li {
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,.15);
  display: flex;
  justify-content: space-between;
  font-size: 14px;
}
.hero-card li:last-child { border-bottom: none; }
.hero-card li span:last-child { color: var(--color-accent); font-weight: 600; }

/* -------- 数据亮点 -------- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: -50px;
  position: relative;
  z-index: 2;
}
.stat-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 22px;
  text-align: center;
  box-shadow: var(--shadow-md);
}
.stat-num {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}
.stat-label { color: var(--color-text-muted); font-size: 13px; margin-top: 6px; }

/* -------- 产品分类入口卡 -------- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.category-card {
  display: block;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  text-decoration: none;
  color: inherit;
}
.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
  color: inherit;
}
.category-card .img-wrap { aspect-ratio: 400/280; overflow: hidden; }
.category-card .img-wrap svg, .category-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.category-card .body { padding: 18px; text-align: center; }
.category-card h3 { margin: 0 0 6px; font-size: 16px; color: var(--color-primary); font-weight: 600; }
.category-card p { margin: 0; font-size: 13px; color: var(--color-text-muted); }

/* -------- 产品卡片网格 -------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.product-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
  text-decoration: none;
  color: inherit;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
  color: inherit;
}
.product-card .img-wrap {
  aspect-ratio: 400/280;
  overflow: hidden;
  background: var(--color-bg-alt);
}
.product-card .img-wrap svg, .product-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.product-card .body { padding: 16px; flex: 1; display: flex; flex-direction: column; }
.product-card .meta {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.product-card .tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  background: rgba(10,75,140,.08);
  color: var(--color-primary);
}
.product-card h3 { margin: 0 0 6px; font-size: 15px; color: var(--color-text); font-weight: 600; line-height: 1.4; }
.product-card .model { font-size: 12px; color: var(--color-text-muted); margin-bottom: 8px; font-family: Consolas, monospace; }
.product-card .summary {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0 0 12px;
  flex: 1;
}
.product-card .more { color: var(--color-accent); font-size: 13px; font-weight: 500; }

/* -------- 产品列表页 -------- */
.products-page {
  padding: 48px 0;
}
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  background: #ffffff;
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  margin-bottom: 28px;
}
.filter-label {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-right: 8px;
  font-weight: 500;
}
.filter-btn {
  background: transparent;
  border: 1px solid var(--color-border);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  color: var(--color-text);
  transition: all var(--transition);
}
.filter-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
}
.filter-bar + .filter-bar { margin-top: -16px; }
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-muted);
}

/* -------- 产品详情页 -------- */
.product-detail-page { padding: 40px 0 64px; }
.breadcrumb {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.detail-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: start;
}
.gallery .main-img {
  aspect-ratio: 4/3;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
}
.gallery .main-img svg, .gallery .main-img img { width: 100%; height: 100%; object-fit: cover; }
.gallery .thumbs {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}
.gallery .thumb {
  width: 80px;
  height: 60px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid transparent;
  cursor: pointer;
  background: var(--color-bg-alt);
}
.gallery .thumb.active { border-color: var(--color-accent); }
.gallery .thumb svg, .gallery .thumb img { width: 100%; height: 100%; object-fit: cover; }
.detail-info h1 { margin: 0 0 8px; font-size: 26px; color: var(--color-text); font-weight: 700; }
.detail-info .model-text {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 14px;
  font-family: Consolas, monospace;
}
.detail-info .tags { display: flex; gap: 8px; margin-bottom: 18px; flex-wrap: wrap; }
.detail-info .tag {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 4px;
  background: rgba(10,75,140,.08);
  color: var(--color-primary);
}
.detail-info .summary {
  background: var(--color-bg-section);
  border-left: 3px solid var(--color-accent);
  padding: 14px 16px;
  border-radius: 4px;
  margin-bottom: 24px;
  color: var(--color-text);
  font-size: 14px;
}
.detail-info .actions { display: flex; gap: 12px; flex-wrap: wrap; }

.detail-section {
  margin-top: 56px;
}
.detail-section h2 {
  font-size: 22px;
  color: var(--color-primary);
  margin: 0 0 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.specs-table th, .specs-table td {
  padding: 12px 16px;
  text-align: left;
  font-size: 14px;
  border-bottom: 1px solid var(--color-border);
}
.specs-table tr:last-child th, .specs-table tr:last-child td { border-bottom: none; }
.specs-table th {
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  font-weight: 500;
  width: 28%;
}
.specs-table td { color: var(--color-text); font-weight: 500; }

.features-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.features-list li {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 16px 16px 44px;
  position: relative;
  font-size: 14px;
}
.features-list li::before {
  content: "✓";
  position: absolute;
  left: 16px;
  top: 14px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #ffffff;
  font-size: 12px;
  line-height: 20px;
  text-align: center;
  font-weight: bold;
}

.description-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.related-products {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

/* -------- 关于我们 -------- */
.about-hero {
  background: linear-gradient(135deg, #0A4B8C 0%, #29ABE2 100%);
  color: #ffffff;
  padding: 64px 0;
  text-align: center;
}
.about-hero h1 { font-size: 36px; margin: 0 0 12px; font-weight: 700; }
.about-hero p { font-size: 16px; opacity: .9; margin: 0; max-width: 700px; margin-left: auto; margin-right: auto; }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.about-text h2 { color: var(--color-primary); font-size: 24px; margin: 0 0 16px; }
.about-text p { color: var(--color-text); font-size: 15px; line-height: 1.8; margin: 0 0 14px; }
.about-text ul { padding-left: 20px; }
.about-text ul li { margin-bottom: 8px; color: var(--color-text); }

.brand-wall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 16px;
}
.brand-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 16px;
  text-align: center;
  transition: all var(--transition);
}
.brand-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}
.brand-card .brand-logo { width: 56px; height: 56px; margin: 0 auto 12px; border-radius: 8px; overflow: hidden; }
.brand-card .brand-name { font-size: 15px; font-weight: 600; color: var(--color-text); }
.brand-card .brand-origin { font-size: 12px; color: var(--color-text-muted); margin-top: 4px; }

.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--color-border);
}
.timeline li {
  position: relative;
  padding-left: 36px;
  padding-bottom: 22px;
}
.timeline li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(41,171,226,.2);
}
.timeline .year { font-weight: 600; color: var(--color-primary); margin-right: 8px; }
.timeline .event { color: var(--color-text); }

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.advantage-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: all var(--transition);
}
.advantage-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.advantage-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #ffffff;
  margin: 0 auto 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.advantage-icon svg { width: 28px; height: 28px; }
.advantage-card h3 { font-size: 16px; color: var(--color-primary); margin: 0 0 8px; }
.advantage-card p { font-size: 13px; color: var(--color-text-muted); margin: 0; line-height: 1.6; }

.industry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.industry-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: all var(--transition);
}
.industry-card:hover { border-color: var(--color-accent); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.industry-card h4 { margin: 0 0 6px; font-size: 14px; color: var(--color-primary); }
.industry-card p { margin: 0; font-size: 13px; color: var(--color-text-muted); }

/* -------- 联系我们 -------- */
.contact-page { padding: 48px 0; }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}
.contact-info-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
}
.contact-info-card h2 { color: var(--color-primary); font-size: 20px; margin: 0 0 20px; }
.contact-item {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}
.contact-item:last-child { border-bottom: none; }
.contact-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(10,75,140,.08);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-icon svg { width: 18px; height: 18px; }
.contact-item-body { flex: 1; }
.contact-item-body .label { font-size: 13px; color: var(--color-text-muted); margin-bottom: 4px; }
.contact-item-body .value { font-size: 15px; color: var(--color-text); font-weight: 500; }
.contact-item-body .value a { color: var(--color-text); }

.contact-form-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
}
.contact-form-card h2 { color: var(--color-primary); font-size: 20px; margin: 0 0 8px; }
.contact-form-card .hint { color: var(--color-text-muted); font-size: 13px; margin: 0 0 20px; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 14px;
}
.form-group { display: flex; flex-direction: column; }
.form-group label { font-size: 13px; color: var(--color-text); margin-bottom: 6px; font-weight: 500; }
.form-group label .req { color: #ef4444; }
.form-group input, .form-group textarea, .form-group select {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  transition: border-color var(--transition);
  background: #ffffff;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
}
.form-group textarea { resize: vertical; min-height: 110px; }
.form-error { color: #ef4444; font-size: 12px; margin-top: 4px; min-height: 14px; }
.form-success {
  background: rgba(16,185,129,.08);
  border: 1px solid var(--color-success);
  color: var(--color-success);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-top: 14px;
  display: none;
}
.form-success.show { display: block; }

.map-card {
  background: linear-gradient(135deg, #e0f2fe, #bae6fd);
  border-radius: var(--radius-md);
  padding: 80px 24px;
  text-align: center;
  color: var(--color-primary);
  margin-top: 32px;
  border: 1px solid #bae6fd;
}
.map-card svg { width: 48px; height: 48px; margin: 0 auto 12px; opacity: .7; }
.map-card h3 { margin: 0 0 6px; font-size: 18px; }
.map-card p { margin: 0; font-size: 13px; color: var(--color-text-muted); }

/* -------- 响应式 -------- */
@media (max-width: 1023px) {
  .hero-inner { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .brand-wall { grid-template-columns: repeat(2, 1fr); }
  .related-products { grid-template-columns: repeat(2, 1fr); }
  .detail-grid { grid-template-columns: 1fr; gap: 32px; }
  .features-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .contact-grid { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 767px) {
  .section { padding: 40px 0; }
  .section-title { font-size: 22px; }
  .nav-menu {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: #ffffff;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: 12px 20px;
    gap: 0;
    display: none;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 12px 8px; border-radius: 0; border-bottom: 1px solid var(--color-border); }
  .nav-menu li:last-child a { border-bottom: none; }
  .nav-toggle { display: block; }
  .hero { padding: 48px 0 60px; }
  .hero h1 { font-size: 26px; }
  .hero p { font-size: 14px; }
  .stats-row { grid-template-columns: repeat(2, 1fr); margin-top: -36px; }
  .stat-card { padding: 16px; }
  .stat-num { font-size: 24px; }
  .products-grid { grid-template-columns: 1fr 1fr; }
  .related-products { grid-template-columns: 1fr 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .advantage-grid { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: 1fr; }
  .brand-wall { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .form-row { grid-template-columns: 1fr; gap: 0; margin-bottom: 0; }
  .form-group { margin-bottom: 14px; }
  .detail-info h1 { font-size: 22px; }
  .gallery .thumb { width: 60px; height: 50px; }
}