/* ============================================
   动力巴巴电机采购网 BabaWatt — 电机产业互联平台
   设计系统 / Design System
   ============================================ */

/* --- 重置与基础 --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  /* 主色系 — 工业蓝 */
  --primary: #1d4ed8;
  --primary-dark: #1e3a8a;
  --primary-light: #3b82f6;
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;

  /* 强调色 — 能源金 */
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --accent-light: #fbbf24;
  --accent-50: #fffbeb;

  /* 中性色 */
  --dark: #0f172a;
  --gray-900: #1e293b;
  --gray-800: #334155;
  --gray-700: #475569;
  --gray-600: #64748b;
  --gray-500: #94a3b8;
  --gray-400: #cbd5e1;
  --gray-300: #e2e8f0;
  --gray-200: #f1f5f9;
  --gray-100: #f8fafc;
  --gray-50: #fafbfc;
  --white: #ffffff;

  /* 语义色 */
  --success: #10b981;
  --success-light: #d1fae5;
  --danger: #ef4444;
  --danger-light: #fee2e2;

  /* 尺寸 */
  --nav-h: 68px;
  --max-w: 1200px;
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(15,23,42,.06), 0 1px 3px rgba(15,23,42,.08);
  --shadow: 0 4px 6px rgba(15,23,42,.05), 0 10px 15px rgba(15,23,42,.08);
  --shadow-md: 0 10px 25px rgba(15,23,42,.1), 0 20px 40px rgba(15,23,42,.05);
  --shadow-lg: 0 20px 50px rgba(15,23,42,.15);
  --shadow-blue: 0 8px 30px rgba(29,78,216,.25);
  --shadow-accent: 0 8px 30px rgba(245,158,11,.3);

  /* 渐变 */
  --grad-blue: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 50%, #3b82f6 100%);
  --grad-blue-dark: linear-gradient(160deg, #0f172a 0%, #1e3a8a 100%);
  --grad-accent: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
  --grad-hero: linear-gradient(135deg, #0f172a 0%, #1e3a8a 45%, #1d4ed8 100%);
  --grad-card: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: color .2s ease; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* --- 排版 --- */
h1,h2,h3,h4,h5,h6 { color: var(--dark); font-weight: 700; line-height: 1.3; }
h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

.section-title { text-align: center; margin-bottom: .6rem; }
.section-subtitle {
  text-align: center;
  color: var(--gray-600);
  font-size: 1.05rem;
  max-width: 680px;
  margin: 0 auto 3rem;
}
.section-tag {
  display: inline-block;
  font-size: .8rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-50);
  padding: .35rem 1rem;
  border-radius: 100px;
  margin-bottom: 1rem;
  letter-spacing: .05em;
}
.section-tag.accent { color: var(--accent-dark); background: var(--accent-50); }

.text-center { text-align: center; }
.text-accent { color: var(--accent-dark); }
.text-primary { color: var(--primary); }

/* --- 布局 --- */
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section { padding: 5rem 0; }
.section-sm { padding: 3.5rem 0; }
.bg-light { background: var(--gray-100); }
.bg-gray-50 { background: var(--gray-50); }
.bg-blue { background: var(--grad-blue-dark); color: #fff; }
.bg-blue h2, .bg-blue h3 { color: #fff; }

/* --- 导航栏 --- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  z-index: 1000;
  transition: box-shadow .3s ease;
}
.navbar.scrolled { box-shadow: var(--shadow-sm); }
.nav-inner {
  max-width: var(--max-w); margin: 0 auto; height: 100%;
  padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: .55rem; font-size: 1.02rem; font-weight: 800; color: var(--dark); white-space: nowrap; }
.logo-en { font-size: .66rem; font-weight: 600; color: var(--accent-dark); letter-spacing: .04em; margin-left: .2rem; }
.logo-icon {
  width: 38px; height: 38px;
  background: var(--grad-blue);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
}
.logo span { color: var(--primary); }
.logo .accent-dot { color: var(--accent); }

.nav-menu { display: flex; align-items: center; gap: 2rem; }
.nav-menu a { font-size: .95rem; font-weight: 500; color: var(--gray-700); position: relative; }
.nav-menu a:hover { color: var(--primary); }
.nav-menu a.active { color: var(--primary); font-weight: 600; }
.nav-menu a.active::after {
  content: ''; position: absolute; bottom: -22px; left: 0; right: 0;
  height: 2px; background: var(--primary); border-radius: 2px;
}

.nav-actions { display: flex; align-items: center; gap: .75rem; }

/* --- 按钮 --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .65rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: .95rem; font-weight: 600;
  cursor: pointer; border: none;
  transition: all .25s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-blue); }
.btn-accent { background: var(--grad-accent); color: #fff; }
.btn-accent:hover { transform: translateY(-1px); box-shadow: var(--shadow-accent); }
.btn-outline { border: 1.5px solid var(--gray-300); color: var(--gray-800); background: transparent; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-white { background: #fff; color: var(--primary-dark); }
.btn-white:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost-light { border: 1.5px solid rgba(255,255,255,.4); color: #fff; background: transparent; }
.btn-ghost-light:hover { background: rgba(255,255,255,.1); }
.btn-lg { padding: .85rem 2.2rem; font-size: 1.05rem; }
.btn-block { display: flex; width: 100%; }

/* --- Hero --- */
.hero {
  position: relative;
  background: var(--grad-hero);
  color: #fff;
  padding: calc(var(--nav-h) + 4rem) 0 5rem;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle at 20% 50%, rgba(59,130,246,.15) 0%, transparent 50%),
                   radial-gradient(circle at 80% 30%, rgba(245,158,11,.1) 0%, transparent 50%);
}
.hero::after {
  content: '';
  position: absolute; bottom: 0; left: 0; right: 0; height: 100px;
  background: linear-gradient(to top, var(--white), transparent);
}
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr .9fr; gap: 3rem; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: .5rem;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2);
  padding: .4rem 1rem; border-radius: 100px; font-size: .85rem; margin-bottom: 1.5rem;
  backdrop-filter: blur(6px);
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-light); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:.4; } }

.hero h1 { color: #fff; font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.2; margin-bottom: 1.2rem; }
.hero h1 .grad-text {
  background: var(--grad-accent);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-desc { font-size: 1.1rem; color: rgba(255,255,255,.8); max-width: 520px; margin-bottom: 2rem; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-visual {
  position: relative;
  display: flex; align-items: center; justify-content: center;
}
.hero-card-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; width: 100%;
}
.hero-float-card {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  backdrop-filter: blur(10px);
  transition: transform .3s ease;
}
.hero-float-card:hover { transform: translateY(-6px); }
.hero-float-card .icon { font-size: 2rem; margin-bottom: .75rem; }
.hero-float-card h4 { color: #fff; font-size: 1rem; margin-bottom: .3rem; }
.hero-float-card p { color: rgba(255,255,255,.7); font-size: .85rem; }
.hero-float-card.accent { background: linear-gradient(135deg, rgba(245,158,11,.2), rgba(245,158,11,.05)); border-color: rgba(245,158,11,.3); }

/* --- 统计数据条 --- */
.stats-bar {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 1px;
  background: var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  margin-top: -3.5rem; position: relative; z-index: 5;
}
.stat-item {
  background: #fff; padding: 2rem 1.5rem; text-align: center;
}
.stat-num { font-size: 2.2rem; font-weight: 800; color: var(--primary); line-height: 1.1; }
.stat-num .suffix { font-size: 1.2rem; color: var(--accent-dark); }
.stat-label { color: var(--gray-600); font-size: .9rem; margin-top: .3rem; }

/* --- 卡片网格 --- */
.card-grid { display: grid; gap: 1.5rem; }
.card-grid.cols-3 { grid-template-columns: repeat(3,1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4,1fr); }
.card-grid.cols-2 { grid-template-columns: repeat(2,1fr); }

.feature-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all .3s ease;
  position: relative;
}
.feature-card:hover {
  border-color: var(--primary-100);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.feature-card .icon-box {
  width: 56px; height: 56px;
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem; margin-bottom: 1.2rem;
}
.icon-blue { background: var(--primary-50); }
.icon-amber { background: var(--accent-50); }
.icon-green { background: var(--success-light); }
.icon-red { background: var(--danger-light); }
.feature-card h3 { margin-bottom: .5rem; }
.feature-card p { color: var(--gray-600); font-size: .95rem; }

/* --- 角色卡（入驻商家类型） --- */
.role-card {
  background: var(--grad-card);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
  transition: all .35s ease;
  overflow: hidden;
  position: relative;
}
.role-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--grad-blue); transform: scaleX(0); transform-origin: left; transition: transform .35s ease;
}
.role-card:hover::before { transform: scaleX(1); }
.role-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.role-card .role-icon {
  width: 64px; height: 64px; border-radius: var(--radius);
  background: var(--grad-blue); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; margin-bottom: 1.2rem;
}
.role-card.amber .role-icon { background: var(--grad-accent); }
.role-card.green .role-icon { background: linear-gradient(135deg,#059669,#10b981); }
.role-card h3 { font-size: 1.3rem; margin-bottom: .3rem; }
.role-card .role-sub { color: var(--gray-500); font-size: .85rem; margin-bottom: 1.2rem; }
.role-card ul { margin-bottom: 1.5rem; }
.role-card ul li { padding: .35rem 0; color: var(--gray-700); font-size: .92rem; position: relative; padding-left: 1.5rem; }
.role-card ul li::before { content: '✓'; position: absolute; left: 0; color: var(--success); font-weight: 700; }

/* --- 供应商卡片 --- */
.supplier-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.2rem; }
.supplier-card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  padding: 1.5rem; text-align: center; transition: all .3s ease;
}
.supplier-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); border-color: var(--primary-100); }
.supplier-logo {
  width: 60px; height: 60px; margin: 0 auto .8rem;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; font-weight: 700; color: #fff;
}
.supplier-card h4 { font-size: 1rem; margin-bottom: .2rem; }
.supplier-card .tag { font-size: .75rem; color: var(--gray-500); margin-bottom: .6rem; }
.supplier-card .verify-badge {
  display: inline-block; font-size: .72rem; font-weight: 600;
  color: var(--success); background: var(--success-light);
  padding: .15rem .6rem; border-radius: 100px;
}
.supplier-card .verify-badge.gold { color: var(--accent-dark); background: var(--accent-50); }

/* --- 流程步骤 --- */
.steps { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.5rem; position: relative; }
.steps::before {
  content: ''; position: absolute; top: 28px; left: 12%; right: 12%;
  height: 2px; background: var(--gray-200); z-index: 0;
}
.step-item { text-align: center; position: relative; z-index: 1; }
.step-num {
  width: 56px; height: 56px; margin: 0 auto 1rem;
  border-radius: 50%; background: #fff; border: 2px solid var(--primary-100);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; font-weight: 800; color: var(--primary);
  position: relative;
}
.step-item:nth-child(even) .step-num { border-color: var(--accent-light); color: var(--accent-dark); }
.step-item h4 { font-size: 1.05rem; margin-bottom: .3rem; }
.step-item p { color: var(--gray-600); font-size: .88rem; max-width: 200px; margin: 0 auto; }

/* --- CTA区 --- */
.cta-band {
  background: var(--grad-blue-dark);
  border-radius: var(--radius-xl);
  padding: 3.5rem 3rem;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(245,158,11,.15), transparent 60%);
}
.cta-band h2 { color: #fff; position: relative; z-index: 1; }
.cta-band p { color: rgba(255,255,255,.8); position: relative; z-index: 1; max-width: 600px; margin: 1rem auto 2rem; }
.cta-band .hero-actions { justify-content: center; position: relative; z-index: 1; }

/* --- 定价卡 --- */
.pricing-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; align-items: stretch; }
.price-card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius-lg);
  padding: 2.2rem; transition: all .3s ease; position: relative; display: flex; flex-direction: column;
}
.price-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.price-card.featured {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-blue);
}
.price-card.featured .popular-badge {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--grad-accent); color: #fff; font-size: .75rem; font-weight: 700;
  padding: .3rem 1.2rem; border-radius: 100px; white-space: nowrap;
}
.price-card .plan-name { font-size: 1.1rem; font-weight: 700; color: var(--gray-700); margin-bottom: .5rem; }
.price-card .plan-price { display: flex; align-items: baseline; gap: .3rem; margin-bottom: .3rem; }
.price-card .plan-price .currency { font-size: 1.5rem; font-weight: 700; color: var(--dark); }
.price-card .plan-price .amount { font-size: 2.8rem; font-weight: 800; color: var(--primary); }
.price-card .plan-price .period { color: var(--gray-500); font-size: .9rem; }
.price-card .plan-desc { color: var(--gray-600); font-size: .88rem; margin-bottom: 1.5rem; }
.price-card .plan-features { flex: 1; margin-bottom: 1.5rem; }
.price-card .plan-features li { padding: .5rem 0; font-size: .92rem; color: var(--gray-700); border-bottom: 1px solid var(--gray-100); position: relative; padding-left: 1.6rem; }
.price-card .plan-features li:last-child { border-bottom: none; }
.price-card .plan-features li::before { content: '✓'; position: absolute; left: 0; color: var(--success); font-weight: 700; }
.price-card .plan-features li.no::before { content: '✕'; color: var(--gray-400); }

/* --- 比较表格 --- */
.compare-table-wrap { overflow-x: auto; border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.compare-table { width: 100%; border-collapse: collapse; background: #fff; min-width: 680px; }
.compare-table th, .compare-table td { padding: 1rem 1.5rem; text-align: center; border-bottom: 1px solid var(--gray-200); }
.compare-table th { background: var(--gray-100); font-weight: 700; color: var(--dark); font-size: .95rem; }
.compare-table th:first-child, .compare-table td:first-child { text-align: left; font-weight: 600; color: var(--gray-800); }
.compare-table th.featured-col { background: var(--primary-50); color: var(--primary-dark); }
.compare-table tbody tr:hover { background: var(--gray-50); }
.compare-table .check { color: var(--success); font-weight: 700; }
.compare-table .cross { color: var(--gray-400); }
.compare-table .text-cell { color: var(--gray-600); font-size: .9rem; }

/* --- 采购需求卡 --- */
.demand-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.2rem; }
.demand-card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  padding: 1.5rem; transition: all .3s ease;
  border-left: 4px solid var(--primary);
}
.demand-card:hover { box-shadow: var(--shadow); }
.demand-card.urgent { border-left-color: var(--danger); }
.demand-card .demand-head { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: .8rem; }
.demand-card h4 { font-size: 1.05rem; margin-bottom: .2rem; }
.demand-card .demand-meta { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: .8rem; font-size: .82rem; color: var(--gray-500); }
.demand-card .demand-meta span { display: flex; align-items: center; gap: .3rem; }
.badge-urgent { background: var(--danger-light); color: var(--danger); font-size: .72rem; font-weight: 600; padding: .15rem .6rem; border-radius: 4px; }
.badge-normal { background: var(--primary-100); color: var(--primary-dark); font-size: .72rem; font-weight: 600; padding: .15rem .6rem; border-radius: 4px; }
.demand-card .demand-body { color: var(--gray-600); font-size: .9rem; margin-bottom: .5rem; }

/* --- FAQ手风琴 --- */
.faq-item { border: 1px solid var(--gray-200); border-radius: var(--radius); margin-bottom: .8rem; overflow: hidden; background: #fff; }
.faq-q { padding: 1.2rem 1.5rem; cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-weight: 600; color: var(--dark); font-size: 1rem; }
.faq-q .arrow { transition: transform .3s ease; color: var(--gray-400); }
.faq-item.open .faq-q .arrow { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-item.open .faq-a { max-height: 300px; }
.faq-a-inner { padding: 0 1.5rem 1.2rem; color: var(--gray-600); font-size: .92rem; line-height: 1.7; }

/* --- 页脚 --- */
.footer { background: var(--dark); color: var(--gray-400); padding: 4rem 0 2rem; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2.5rem; margin-bottom: 3rem; }
.footer .logo { color: #fff; margin-bottom: 1rem; }
.footer .logo-en { color: var(--accent-light); }
.footer p { font-size: .9rem; line-height: 1.8; }
.footer h5 { color: #fff; font-size: 1rem; margin-bottom: 1.2rem; }
.footer-links a { display: block; padding: .3rem 0; font-size: .88rem; color: var(--gray-400); }
.footer-links a:hover { color: var(--accent-light); }
.footer-contact p { font-size: .88rem; margin-bottom: .5rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding-top: 1.5rem; display: flex; justify-content: space-between; align-items: center; font-size: .82rem; }
.footer-qr { display: flex; gap: 1.5rem; }
.footer-qr-item { text-align: center; }
.footer-qr-box { width: 90px; height: 90px; background: #fff; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 2rem; margin-bottom: .4rem; }

/* --- 页面Banner（子页） --- */
.page-banner {
  background: var(--grad-hero);
  color: #fff;
  padding: calc(var(--nav-h) + 3rem) 0 3.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(245,158,11,.12), transparent 60%);
}
.page-banner .container { position: relative; z-index: 1; }
.page-banner h1 { color: #fff; margin-bottom: .8rem; }
.page-banner p { color: rgba(255,255,255,.8); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }
.breadcrumb { font-size: .85rem; color: rgba(255,255,255,.5); margin-bottom: 1rem; }
.breadcrumb a:hover { color: #fff; }

/* --- 时间线 --- */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before { content: ''; position: absolute; left: 8px; top: 8px; bottom: 8px; width: 2px; background: var(--gray-200); }
.timeline-item { position: relative; padding-bottom: 2rem; }
.timeline-item::before { content: ''; position: absolute; left: -2rem; top: 4px; width: 18px; height: 18px; border-radius: 50%; background: var(--primary); border: 3px solid #fff; box-shadow: 0 0 0 3px var(--primary-100); }
.timeline-item .tl-year { font-size: 1.3rem; font-weight: 800; color: var(--primary); margin-bottom: .2rem; }
.timeline-item .tl-title { font-weight: 600; color: var(--dark); margin-bottom: .3rem; }
.timeline-item .tl-desc { color: var(--gray-600); font-size: .9rem; }

/* --- 信息行 --- */
.info-row { display: flex; align-items: flex-start; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--gray-100); }
.info-row:last-child { border-bottom: none; }
.info-row .info-icon { width: 44px; height: 44px; border-radius: var(--radius-sm); background: var(--primary-50); display: flex; align-items: center; justify-content: center; font-size: 1.3rem; flex-shrink: 0; }
.info-row h4 { font-size: 1rem; margin-bottom: .2rem; }
.info-row p { font-size: .88rem; color: var(--gray-600); }

/* --- 电机产品分类（分组式） --- */
.cat-group {
  background: #fff; border: 1px solid var(--gray-300); border-radius: var(--radius-lg);
  overflow: hidden; margin-bottom: 1.4rem;
  box-shadow: var(--shadow-sm); transition: box-shadow .3s ease;
}
.cat-group:hover { box-shadow: var(--shadow-md); }
.cat-group-head {
  display: flex; align-items: center; gap: 1rem;
  padding: 1rem 1.5rem 1rem 1.7rem;
  background: linear-gradient(90deg, var(--gc-soft), #fff 72%);
  border-bottom: 1px solid var(--gray-200);
  position: relative;
}
.cat-group-head::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
  width: 4px; background: var(--gc);
}
.cat-group-icon {
  width: 46px; height: 46px; border-radius: var(--radius); flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 1.4rem;
  background: var(--gc); box-shadow: 0 6px 14px rgba(15,23,42,.18);
}
.cat-group-title h3 { font-size: 1.12rem; font-weight: 700; color: var(--dark); }
.cat-group-title p { font-size: .8rem; color: var(--gray-500); margin-top: 2px; }
.cat-group-count {
  margin-left: auto; flex-shrink: 0; font-size: .74rem; font-weight: 700;
  color: var(--gc); background: var(--gc-soft);
  border: 1px solid var(--gray-200); border-radius: 100px; padding: .32rem .95rem;
  letter-spacing: .5px;
}
.cat-group-body {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: .9rem; padding: 1.15rem 1.4rem;
}
.cat-item {
  display: flex; align-items: center; gap: .8rem;
  padding: .95rem 1rem; text-decoration: none;
  background: var(--gray-50); border: 1px solid var(--gray-300);
  border-radius: var(--radius); position: relative; overflow: hidden;
  transition: all .3s ease;
}
.cat-item::after {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px; background: var(--gc); opacity: 0; transition: opacity .3s ease;
}
.cat-item:hover {
  background: #fff; border-color: var(--gc);
  transform: translateY(-3px);
  box-shadow: 0 10px 22px rgba(15,23,42,.09);
}
.cat-item:hover::after { opacity: 1; }
.cat-num {
  font-size: .7rem; font-weight: 800; color: var(--gc); opacity: .4;
  letter-spacing: .5px; flex-shrink: 0; font-family: Consolas, monospace;
}
.cat-ico {
  width: 42px; height: 42px; border-radius: var(--radius-sm); flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 1.2rem;
  background: var(--gc-soft); transition: transform .3s ease;
}
.cat-item:hover .cat-ico { transform: scale(1.1); }
.cat-info { display: flex; flex-direction: column; gap: 2px; min-width: 0; flex: 1; }
.cat-info strong {
  font-size: .93rem; font-weight: 600; color: var(--dark);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.cat-info em { font-style: normal; font-size: .74rem; color: var(--gray-500); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cat-tags { display: flex; gap: .35rem; margin-top: 4px; }
.cat-tags i {
  font-style: normal; font-size: .66rem; font-weight: 600;
  color: var(--gc); background: var(--gc-soft);
  padding: 1px 7px; border-radius: 100px; border: 1px solid var(--gray-200);
}
.cat-arrow {
  color: var(--gray-400); font-size: .95rem; flex-shrink: 0;
  transition: all .3s ease;
}
.cat-item:hover .cat-arrow { color: var(--gc); transform: translateX(3px); }
.cat-more { text-align: center; margin-top: 1.7rem; }
.cat-more p { color: var(--gray-500); font-size: .9rem; margin-bottom: .95rem; }

/* --- 标签云 --- */
.tag-cloud { display: flex; flex-wrap: wrap; gap: .6rem; }
.tag-cloud a {
  font-size: .85rem; padding: .4rem 1rem;
  border-radius: 100px; border: 1px solid var(--gray-200);
  color: var(--gray-600); transition: all .2s ease;
}
.tag-cloud a:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-50); }

/* --- 移动端菜单按钮 --- */
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--gray-800); border-radius: 2px; transition: all .3s; }

/* --- 响应式 --- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .stats-bar { grid-template-columns: repeat(2,1fr); }
  .card-grid.cols-4 { grid-template-columns: repeat(2,1fr); }
  .supplier-grid { grid-template-columns: repeat(2,1fr); }
  .category-grid, .cat-group-body { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 768px) {
  .nav-menu { display: none; }
  .nav-toggle { display: flex; }
  .nav-menu.open {
    display: flex; flex-direction: column;
    position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: #fff; padding: 1.5rem; gap: 1rem;
    box-shadow: var(--shadow-md); border-top: 1px solid var(--gray-200);
  }
  .nav-menu.open a.active::after { display: none; }
  .nav-actions .btn-outline { display: none; }
  .card-grid.cols-3, .card-grid.cols-2 { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2,1fr); }
  .steps::before { display: none; }
  .demand-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
  .section { padding: 3rem 0; }
  .cta-band { padding: 2.5rem 1.5rem; }
}

@media (max-width: 480px) {
  .stats-bar { grid-template-columns: 1fr; }
  .card-grid.cols-4 { grid-template-columns: 1fr; }
  .supplier-grid { grid-template-columns: 1fr; }
  .category-grid, .cat-group-body { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
}