:root {

  --primary: #1A3A4A;
  --primary-light: #2C5F7A;
  --primary-dark: #0F1A2E;
  --accent: #C9A84C;
  --accent-hover: #B8963E;
  --accent-light: rgba(201, 168, 76, 0.12);
  --bg: #F5F6F8;
  --bg-alt: #EEF0F3;
  --card: #ffffff;
  --card-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --card-shadow-hover: 0 8px 40px rgba(0, 0, 0, 0.10);
  --text: #1A1A2E;
  --text-secondary: #5A6A7E;
  --text-light: #8E9EAF;
  --text-muted: #B0BCC8;
  --border: #E2E8F0;
  --border-light: #F0F2F5;
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.10);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, Consolas, monospace;
  --max-width: 1200px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}

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

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

ul, ol { list-style: none; }

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--text);
}

h1 { font-size: clamp(32px, 4vw, 48px); font-weight: 800; }
h2 { font-size: clamp(24px, 2.8vw, 36px); font-weight: 700; }
h3 { font-size: clamp(18px, 1.8vw, 22px); font-weight: 600; }
h4 { font-size: 16px; font-weight: 600; }

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.section-tag::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 2px;
  background: var(--accent);
}

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

.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--card);
}

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

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  margin-bottom: 12px;
}

.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

.section-header.light p {
  color: rgba(255, 255, 255, 0.65);
}

.topbar {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
  padding: 6px 0;
}
.topbar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 24px;
}
.topbar-links a {
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}
.topbar-links a:hover { color: #fff; }
.topbar-links .sep { color: rgba(255, 255, 255, 0.2); margin: 0 10px; }

.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--card);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}
.header.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: var(--header-height);
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo img {
  height: 38px;
  width: auto;
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.3px;
}
.logo-sub {
  font-size: 10px;
  color: var(--text-light);
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav a {
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}
.nav a:hover {
  color: var(--primary);
  background: var(--bg);
}
.nav a.active {
  color: var(--primary);
  font-weight: 600;
}
.nav a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 18px;
  right: 18px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.nav-phone {
  margin-left: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  border-left: 1px solid var(--border);
  white-space: nowrap;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

.hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  color: #fff;
  padding: 100px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(201, 168, 76, 0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 1;
}
.hero-text { flex: 1; }
.hero-text .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.hero-text h1 {
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
  color: #fff;
}
.hero-text h1 .highlight {
  color: var(--accent);
}
.hero-text p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
  max-width: 540px;
  margin-bottom: 28px;
}
.hero-btns {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.hero-visual {
  flex: 0 0 380px;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.hero-visual .placeholder-glow {
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at center, rgba(201, 168, 76, 0.08) 0%, transparent 70%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
  opacity: 0.6;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  border: none;
  line-height: 1;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--accent);
  color: #1A1A2E;
  box-shadow: 0 4px 16px rgba(201, 168, 76, 0.3);
}
.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 6px 24px rgba(201, 168, 76, 0.4);
}
.btn-outline {
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: #fff;
}
.btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.08);
}
.btn-ghost {
  background: transparent;
  color: var(--primary);
  padding: 8px 0;
}
.btn-ghost:hover { color: var(--accent); transform: none; }
.btn-whatsapp {
  background: #25D366;
  color: #fff;
}
.btn-whatsapp:hover { opacity: 0.9; }
.btn-lg { padding: 16px 40px; font-size: 16px; }
.btn-sm { padding: 10px 20px; font-size: 13px; }

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  transition: var(--transition);
  overflow: hidden;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}

.cat-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.cat-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 28px 16px;
  text-align: center;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
  cursor: pointer;
  border-top: 3px solid transparent;
}
.cat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}
.cat-card .cicon { font-size: 32px; margin-bottom: 10px; }
.cat-card .cname { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.cat-card .cdesc { font-size: 12px; color: var(--text-light); line-height: 1.5; }
.cat-card.eq { border-top-color: var(--primary); }
.cat-card.con { border-top-color: var(--accent); }
.cat-card.tool { border-top-color: #8B5CF6; }
.cat-card.service { border-top-color: #10B981; }

.brand-showcase {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.brand-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 20px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}
.brand-card:hover {
  border-color: var(--primary);
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-4px);
}
.brand-card .bname { font-size: 20px; font-weight: 700; }
.brand-card .bname.karcher { color: #E31E24; }
.brand-card .bname.biocce { color: var(--primary); }
.brand-card .bname.nilfisk { color: #003D7A; }
.brand-card .bname.comac { color: #00843D; }
.brand-card .bname.tennant { color: #00529B; }
.brand-card .btag { font-size: 12px; color: var(--text-light); margin-top: 6px; }

.prod-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.prod-card {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
  cursor: pointer;
}
.prod-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}
.prod-card .pimg {
  height: 200px;
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.prod-card .pimg img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 16px;
  transition: transform 0.5s ease;
}
.prod-card:hover .pimg img { transform: scale(1.05); }
.prod-card .pinfo { padding: 16px 18px 18px; }
.prod-card .pbrand {
  font-size: 10px;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}
.prod-card .pname {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}
.prod-card .pprice {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
}
.prod-card .pprice small {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-light);
}
.prod-card .pbtns {
  margin-top: 12px;
  display: flex;
  gap: 8px;
}
.prod-card .pbtns a {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  text-align: center;
  flex: 1;
  transition: var(--transition);
}
.prod-card .pbtns .inq {
  background: var(--primary);
  color: #fff;
}
.prod-card .pbtns .inq:hover { background: var(--primary-light); }
.prod-card .pbtns .buy {
  background: var(--accent);
  color: #1A1A2E;
}
.prod-card .pbtns .buy:hover { background: var(--accent-hover); }

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}
.service-card .sc-icon {
  font-size: 40px;
  text-align: center;
  padding: 28px 20px 8px;
  background: linear-gradient(180deg, var(--bg), var(--card));
}
.service-card .sc-body { padding: 0 24px 24px; }
.service-card .sc-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.service-card .sc-body .sc-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 12px; }
.service-card .sc-body .sc-list { margin-bottom: 14px; }
.service-card .sc-body .sc-list li {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 5px 0;
  border-bottom: 1px solid var(--border-light);
}
.service-card .sc-body .sc-list li:last-child { border-bottom: none; }
.service-card .sc-body .sc-list li::before { content: '✓ '; color: var(--accent); font-weight: 700; }

.sol-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.sol-card {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
  cursor: pointer;
}
.sol-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}
.sol-card .sol-icon {
  font-size: 44px;
  text-align: center;
  padding: 28px 20px 8px;
  background: linear-gradient(180deg, var(--bg), var(--card));
}
.sol-card .sol-body { padding: 0 20px 20px; }
.sol-card .sol-body h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.sol-card .sol-body .sol-tag {
  display: inline-block;
  font-size: 10px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 6px;
}
.sol-card .sol-body .sol-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 10px; }
.sol-card .sol-body .sol-items { font-size: 12px; color: var(--text-light); line-height: 2; padding-left: 4px; }
.sol-card .sol-body .sol-more { font-size: 12px; color: var(--accent); font-weight: 600; display: inline-block; margin-top: 8px; }
.sol-card .sol-body .sol-more:hover { color: var(--accent-hover); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stat-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--card-shadow);
  border-top: 3px solid var(--accent);
}
.stat-card .sn { font-size: 32px; font-weight: 800; color: var(--primary); }
.stat-card .sl { font-size: 13px; color: var(--text-light); margin-top: 6px; }

.biz-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.biz-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
}
.biz-card:hover { transform: translateY(-4px); box-shadow: var(--card-shadow-hover); }
.biz-card .bi { font-size: 40px; margin-bottom: 12px; }
.biz-card h4 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.biz-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }

.supply-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.supply-card {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
}
.supply-card:hover { transform: translateY(-4px); box-shadow: var(--card-shadow-hover); }
.supply-card .sp-icon { font-size: 40px; text-align: center; padding: 28px 20px 8px; }
.supply-card .sp-body { padding: 0 24px 24px; }
.supply-card .sp-body h4 { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.supply-card .sp-body p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }
.supply-card .sp-body .sp-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.supply-card .sp-body .sp-tags span {
  background: var(--bg);
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 11px;
  color: var(--text-light);
  border: 1px solid var(--border);
}

.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.about-intro .ai-text { font-size: 15px; color: var(--text-secondary); line-height: 2; }
.about-intro .ai-text strong { color: var(--text); }
.about-intro .ai-text p { margin-bottom: 16px; }

.timeline {
  position: relative;
  padding-left: 32px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: var(--border);
}
.tl-item {
  position: relative;
  padding-bottom: 28px;
}
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: '';
  position: absolute;
  left: -24px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--card);
  box-shadow: 0 0 0 2px var(--accent);
}
.tl-year { font-size: 13px; color: var(--accent); font-weight: 700; margin-bottom: 4px; }
.tl-text { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

.brand-block {
  background: var(--card);
  border-radius: var(--radius);
  margin-bottom: 24px;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
}
.brand-block:hover { box-shadow: var(--card-shadow-hover); }
.brand-bar { height: 4px; }
.brand-bar-karcher { background: linear-gradient(90deg, #E31E24, #ff6b6b); }
.brand-bar-biocce { background: linear-gradient(90deg, var(--primary), var(--primary-light)); }
.brand-bar-nilfisk { background: linear-gradient(90deg, #003D7A, #4a90d9); }
.brand-bar-comac { background: linear-gradient(90deg, #00843D, #4caf50); }
.brand-bar-tennant { background: linear-gradient(90deg, #00529B, #5b9bd5); }
.brand-header { padding: 28px 32px 16px; display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.brand-logo { font-size: 30px; font-weight: 800; letter-spacing: 1px; line-height: 1; }
.brand-logo-karcher { color: #E31E24; }
.brand-logo-biocce { color: var(--primary); }
.brand-logo-nilfisk { color: #003D7A; }
.brand-logo-comac { color: #00843D; }
.brand-logo-tennant { color: #00529B; }
.brand-meta { flex: 1; }
.brand-meta h3 { font-size: 20px; font-weight: 700; margin-bottom: 4px; }
.brand-meta .origin { font-size: 13px; color: var(--text-light); }
.brand-meta .origin span { display: inline-block; background: var(--bg); padding: 2px 10px; border-radius: 4px; margin-right: 6px; font-size: 11px; }
.brand-desc { padding: 0 32px 16px; font-size: 14px; color: var(--text-secondary); line-height: 1.8; }
.brand-tags { padding: 0 32px 20px; display: flex; gap: 8px; flex-wrap: wrap; }
.brand-tags span { background: var(--bg); padding: 4px 14px; border-radius: 20px; font-size: 12px; color: var(--text-secondary); border: 1px solid var(--border); }
.brand-prods { padding: 0 32px 28px; }
.brand-prods .bp-title { font-size: 14px; font-weight: 600; color: var(--text-secondary); margin-bottom: 12px; }
.brand-prods .bp-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.bp-card { background: var(--bg); border-radius: var(--radius-sm); padding: 16px; text-align: center; transition: var(--transition); border: 1px solid var(--border); }
.bp-card:hover { border-color: var(--accent); box-shadow: var(--shadow); }
.bp-card .bp-img { height: 80px; display: flex; align-items: center; justify-content: center; font-size: 32px; color: var(--text-light); margin-bottom: 8px; background: var(--card); border-radius: 8px; }
.bp-card .bp-name { font-size: 13px; font-weight: 600; margin-bottom: 2px; }
.bp-card .bp-model { font-size: 12px; color: var(--text-light); }

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.info-card {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-light);
}
.info-card:last-child { border-bottom: none; }
.info-card .ico {
  width: 48px;
  height: 48px;
  background: var(--accent-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.info-card .detail h3 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.info-card .detail a { font-size: 16px; color: var(--primary); font-weight: 500; }
.info-card .detail a:hover { color: var(--primary-light); }
.info-card .detail p { font-size: 13px; color: var(--text-light); margin-top: 2px; }

.feature-bar {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 24px 0;
}
.feature-bar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 0 24px;
  text-align: center;
}
.feature-bar-inner strong {
  color: #fff;
  display: block;
  font-size: 15px;
  margin-bottom: 4px;
}
.feature-bar-inner span {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
}

.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text);
}
.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
  background: var(--card);
  color: var(--text);
}
.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 58, 74, 0.1);
}
.form-textarea {
  resize: vertical;
  min-height: 120px;
}
select.form-input { appearance: auto; cursor: pointer; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.footer {
  background: #0A1220;
  color: rgba(255, 255, 255, 0.55);
  padding: 60px 0 0;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 0 24px 40px;
}
.footer h3 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer h4 {
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}
.footer p { font-size: 13px; line-height: 1.8; }
.footer ul li { margin-bottom: 8px; }
.footer ul li a { font-size: 13px; color: rgba(255, 255, 255, 0.55); transition: var(--transition); }
.footer ul li a:hover { color: #fff; }
.footer .contact li { font-size: 13px; margin-bottom: 10px; }
.footer .contact li a { color: var(--accent); }
.footer .contact li a:hover { color: var(--accent-hover); }
.footer-social { display: flex; gap: 12px; margin-top: 16px; }
.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  color: rgba(255, 255, 255, 0.5);
}
.footer-social a:hover {
  background: var(--accent);
  color: var(--primary-dark);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 16px 24px;
  text-align: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.3);
}

.breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px;
  font-size: 13px;
  color: var(--text-light);
}
.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { text-decoration: underline; }

.page-404 {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px;
}
.page-404 .code { font-size: 120px; font-weight: 800; color: var(--primary); line-height: 1; margin-bottom: 8px; }
.page-404 .code span { color: var(--accent); }
.page-404 h2 { font-size: 24px; margin-bottom: 12px; }
.page-404 p { color: var(--text-secondary); margin-bottom: 28px; }

.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  align-self: start;
  position: sticky;
  top: calc(var(--header-height) + 24px);
}
.sidebar .cat-head {
  padding: 16px 20px;
  font-weight: 700;
  font-size: 14px;
  background: var(--primary);
  color: #fff;
}
.sidebar .cat-item {
  padding: 12px 20px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}
.sidebar .cat-item:hover { background: var(--bg); color: var(--primary); }
.sidebar .cat-item.active { color: var(--primary); font-weight: 600; background: var(--accent-light); }
.sidebar .cat-item.has-sub { cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
.sidebar .cat-item .arrow { font-size: 10px; transition: var(--transition); }
.sidebar .cat-item.open .arrow { transform: rotate(90deg); }
.sidebar .sub-list { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.sidebar .cat-item.open .sub-list { max-height: 300px; }
.sidebar .sub-item { padding: 8px 0 8px 20px; font-size: 12px; color: var(--text-light); cursor: pointer; }
.sidebar .sub-item:hover { color: var(--primary); }

.prod-page-layout {
  display: flex;
  gap: 32px;
  align-items: start;
}
.prod-main { flex: 1; min-width: 0; }

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .hero-visual { display: none; }
  .cat-grid { grid-template-columns: repeat(3, 1fr); }
  .prod-grid { grid-template-columns: repeat(3, 1fr); }
  .brand-showcase { grid-template-columns: repeat(3, 1fr); }
  .sol-grid { grid-template-columns: repeat(2, 1fr); }
  .brand-prods .bp-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .nav { display: none; }
  .nav.open { display: flex; flex-direction: column; position: absolute; top: var(--header-height); left: 0; right: 0; background: var(--card); border-bottom: 1px solid var(--border); padding: 12px; box-shadow: var(--shadow-lg); }
  .nav-phone { border-left: none; margin-left: 0; padding: 8px 18px; }
  .menu-toggle { display: flex; }
  .section { padding: 60px 0; }
  .hero { padding: 60px 0 50px; }
  .about-intro { grid-template-columns: 1fr; gap: 32px; }
  .contact-layout { grid-template-columns: 1fr; gap: 32px; }
  .feature-bar-inner { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .biz-grid { grid-template-columns: repeat(2, 1fr); }
  .supply-grid { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: 1fr; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-page-layout { flex-direction: column; }
  .sidebar { width: 100%; position: static; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .section { padding: 40px 0; }
  .hero { padding: 40px 0 36px; }
  .hero-text h1 { font-size: 26px; }
  .hero-text p { font-size: 14px; }
  .btn { padding: 12px 24px; font-size: 14px; min-height: 44px; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .cat-card { padding: 20px 12px; }
  .prod-grid { grid-template-columns: 1fr; }
  .brand-showcase { grid-template-columns: repeat(2, 1fr); }
  .sol-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .biz-grid { grid-template-columns: 1fr; }
  .feature-bar-inner { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .topbar-links .hide-mobile { display: none; }
  .topbar { font-size: 12px; }
  /* Mobile table scroll */
  .article-body table, .prod-params table, .product-specs table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; white-space: nowrap; }
  .article-body th, .article-body td, .prod-params th, .prod-params td { padding: 6px 8px; font-size: 12px; }
  /* Touch targets */
  .share-btn { min-height: 36px; padding: 8px 12px; }
  .nav a { padding: 10px 0; }
  /* Article mobile */
  .article-wrap { padding: 24px 16px 40px; }
  .article-hero { padding: 40px 0; }
  .article-hero h1 { font-size: 22px; }
  .article-hero p { font-size: 14px; }
  .article-body h2 { font-size: 18px; }
  .article-body p, .article-body li { font-size: 14px; }
  .share-bar { gap: 6px; padding: 16px 0; }
  .share-btn { font-size: 11px; padding: 6px 10px; }
}
/* ====== 询价单系统 ====== */
.inquiry-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.5);z-index:9999;display:flex;align-items:center;justify-content:center}
.inquiry-modal{background:#fff;border-radius:10px;width:90%;max-width:520px;max-height:80vh;display:flex;flex-direction:column;box-shadow:0 10px 40px rgba(0,0,0,0.2);animation:modalIn .25s ease}
@keyframes modalIn{from{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}
.inquiry-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid #eee}
.inquiry-header h3{margin:0;font-size:17px;color:var(--primary)}
.inquiry-close{background:none;border:none;font-size:20px;cursor:pointer;color:#999;padding:0 4px}
.inquiry-close:hover{color:#333}
.inquiry-body{flex:1;overflow-y:auto;padding:12px 20px;min-height:100px}
.inquiry-empty{text-align:center;color:#999;padding:30px 0;font-size:15px}
.inquiry-item{display:flex;justify-content:space-between;align-items:flex-start;padding:10px 0;border-bottom:1px solid #f0f0f0}
.inquiry-item:last-child{border-bottom:none}
.inquiry-item-info{flex:1;margin-right:12px}
.inquiry-item-name{font-size:14px;font-weight:600;color:#333;margin-bottom:2px}
.inquiry-item-model{font-size:12px;color:#999}
.inquiry-item-spec{font-size:12px;color:#aaa;margin-top:2px}
.inquiry-item-qty{font-size:13px;color:#555;margin-top:6px}
.inquiry-qty-input{width:56px;padding:3px 6px;border:1px solid #ddd;border-radius:4px;text-align:center;font-size:13px}
.inquiry-item-remove{background:none;border:none;color:#ccc;font-size:16px;cursor:pointer;padding:4px}
.inquiry-item-remove:hover{color:#e74c3c}
.inquiry-footer{display:flex;gap:8px;padding:12px 20px;border-top:1px solid #eee}
.btn-inquiry-submit{flex:1;background:var(--primary);color:#fff;border:none;padding:10px 0;border-radius:6px;font-size:14px;cursor:pointer}
.btn-inquiry-submit:hover{background:var(--primary-light)}
.btn-inquiry-clear{background:#f5f5f5;color:#666;border:1px solid #ddd;padding:10px 16px;border-radius:6px;font-size:13px;cursor:pointer}
.btn-inquiry-clear:hover{background:#eee}
.inquiry-form{padding:8px 0}
.inquiry-form label{display:block;margin-bottom:12px;font-size:13px;color:#555}
.inquiry-field{display:block;width:100%;margin-top:4px;padding:8px 10px;border:1px solid #ddd;border-radius:5px;font-size:14px;box-sizing:border-box}
.inquiry-field:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 2px rgba(26,58,74,0.1)}
.inquiry-textarea{height:64px;resize:vertical}
.btn-inquiry-send{width:100%;background:var(--accent);color:#fff;border:none;padding:11px 0;border-radius:6px;font-size:15px;font-weight:600;cursor:pointer;margin-top:4px}
.btn-inquiry-send:hover{background:var(--accent-hover)}
.inquiry-toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(20px);background:#333;color:#fff;padding:10px 20px;border-radius:8px;font-size:14px;z-index:10000;opacity:0;transition:all .3s ease;white-space:nowrap}
.inquiry-toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.cart-badge{display:inline-flex;align-items:center;justify-content:center;background:#e74c3c;color:#fff;font-size:11px;font-weight:600;min-width:17px;height:17px;border-radius:9px;padding:0 4px;margin-left:4px;vertical-align:super}