/* ══════════════════════════════════════════
   智慧运输平台 TMS — Promotional Website CSS
   ══════════════════════════════════════════ */

:root {
  --primary: #1677ff;
  --primary-dark: #0958d9;
  --primary-light: #4096ff;
  --primary-bg: #e6f4ff;
  --secondary: #06b6d4;
  --accent: #f59e0b;
  --success: #52c41a;
  --warning: #fa8c16;
  --danger: #f5222d;
  --purple: #722ed1;

  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  --dark-bg: #0a0f1e;
  --dark-card: #111827;
  --dark-border: #1f2937;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,.15);
  --shadow-blue: 0 8px 32px rgba(22,119,255,.25);

  --font: 'Inter', 'PingFang SC', 'Noto Sans SC', -apple-system, system-ui, sans-serif;
  --transition: .25s cubic-bezier(.4,0,.2,1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--gray-800);
  background: #fff;
  line-height: 1.6;
  overflow-x: hidden;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ──── BUTTONS ──── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 12px 40px rgba(22,119,255,.35); }

.btn-ghost {
  background: transparent;
  color: var(--gray-700);
  border-color: var(--gray-300);
}
.btn-ghost:hover { background: var(--gray-50); border-color: var(--gray-400); }

.btn-ghost-white {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.4);
}
.btn-ghost-white:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.7); }

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

.btn-white {
  background: #fff;
  color: var(--primary);
  font-weight: 700;
}
.btn-white:hover { background: var(--gray-50); transform: translateY(-1px); }

.btn-gold {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #fff;
  box-shadow: 0 8px 24px rgba(245,158,11,.3);
}
.btn-gold:hover { transform: translateY(-1px); box-shadow: 0 12px 32px rgba(245,158,11,.4); }

.btn-nav {
  background: var(--primary);
  color: #fff;
  padding: 8px 18px;
  font-size: .875rem;
}
.btn-nav:hover { background: var(--primary-dark); }

.btn-lg { padding: 14px 32px; font-size: 1.05rem; }
.btn-block { width: 100%; margin-top: 16px; }

/* ──── NAV ──── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--gray-200);
  transition: box-shadow var(--transition);
}
.nav.scrolled { box-shadow: var(--shadow-md); }

.nav-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 64px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-logo-img {
  height: 34px;
  width: auto;
  display: block;
  flex-shrink: 0;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.nav-logo-en {
  font-size: 1rem;
  font-weight: 800;
  color: #1A3C6E;
  letter-spacing: -.01em;
}

.nav-logo-zh {
  font-size: .65rem;
  color: var(--gray-400);
  font-weight: 500;
  letter-spacing: .04em;
}

.nav-links {
  display: flex;
  gap: 4px;
  margin-left: auto;
}
.nav-links a {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: .9rem;
  color: var(--gray-600);
  font-weight: 500;
  transition: all var(--transition);
}
.nav-links a:hover { color: var(--primary); background: var(--primary-bg); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray-700);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ──── HERO ──── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 64px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 800px 600px at 60% 50%, rgba(22,119,255,.12) 0%, transparent 70%),
    radial-gradient(ellipse 600px 400px at 10% 80%, rgba(6,182,212,.08) 0%, transparent 60%),
    linear-gradient(160deg, #f0f7ff 0%, #fafbff 50%, #f0fdfa 100%);
  z-index: 0;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(22,119,255,.08) 1px, transparent 0);
  background-size: 40px 40px;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 80px 24px;
}

.hero-logo {
  margin-bottom: 20px;
  animation: fadeInDown .7s ease .05s both;
}

.hero-logo-img {
  height: 80px;
  width: auto;
  margin: 0 auto;
  display: block;
  /* SVG has transparent background; show on light hero bg */
  filter: drop-shadow(0 2px 12px rgba(26,60,110,.15));
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(22,119,255,.08);
  border: 1px solid rgba(22,119,255,.2);
  color: var(--primary);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  font-size: .875rem;
  font-weight: 600;
  margin-bottom: 20px;
  animation: fadeInDown .8s ease;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--gray-900);
  margin-bottom: 24px;
  animation: fadeInUp .8s ease .1s both;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 60%, #8b5cf6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.8;
  animation: fadeInUp .8s ease .2s both;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp .8s ease .3s both;
  margin-bottom: 64px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
  background: rgba(255,255,255,.8);
  backdrop-filter: blur(12px);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: 24px 48px;
  box-shadow: var(--shadow-lg);
  max-width: 560px;
  margin: 0 auto;
  animation: fadeInUp .8s ease .4s both;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 0 28px;
  min-width: 110px;
}

.stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  min-width: 3.5ch;
  text-align: center;
  display: block;
}

.stat-label {
  font-size: .8rem;
  color: var(--gray-500);
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--gray-200);
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--gray-400);
  font-size: .75rem;
  z-index: 1;
  animation: bounce 2s infinite;
}

.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--gray-300);
  border-bottom: 2px solid var(--gray-300);
  transform: rotate(45deg);
}

/* ──── MARQUEE ──── */
.marquee-wrap {
  background: var(--gray-900);
  overflow: hidden;
  padding: 12px 0;
  border-top: 1px solid var(--gray-800);
  border-bottom: 1px solid var(--gray-800);
}

.marquee {
  display: flex;
  gap: 24px;
  animation: marquee 30s linear infinite;
  white-space: nowrap;
  width: max-content;
}

.marquee span {
  color: var(--gray-400);
  font-size: .85rem;
  font-weight: 500;
  padding: 0 4px;
}

.marquee span:not(:contains("·")) {
  color: #60a5fa;
}

/* ──── SECTIONS ──── */
.section {
  padding: 96px 0;
}

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

.section-gradient {
  background: linear-gradient(160deg, #f0f7ff 0%, #f8faff 100%);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  background: var(--primary-bg);
  color: var(--primary);
  border: 1px solid rgba(22,119,255,.2);
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 16px;
}

.section-tag-light {
  background: rgba(96,165,250,.12);
  color: #93c5fd;
  border-color: rgba(147,197,253,.2);
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--gray-900);
  margin-bottom: 16px;
  letter-spacing: -.01em;
}

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

.section-sub {
  font-size: 1.05rem;
  color: var(--gray-500);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

.section-sub.light { color: var(--gray-400); }

/* ──── FEATURE CARDS ──── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
}

.card-accent-blue::before { background: linear-gradient(90deg, var(--primary), var(--secondary)); }
.card-accent-green::before { background: linear-gradient(90deg, #52c41a, #13c2c2); }
.card-accent-orange::before { background: linear-gradient(90deg, #fa8c16, #f59e0b); }
.card-accent-purple::before { background: linear-gradient(90deg, var(--purple), var(--primary)); }
.card-accent-teal::before { background: linear-gradient(90deg, var(--secondary), #52c41a); }
.card-accent-red::before { background: linear-gradient(90deg, var(--danger), #fa8c16); }

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

.fc-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  display: block;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: .9rem;
  color: var(--gray-500);
  line-height: 1.6;
  margin-bottom: 16px;
}

.fc-list li {
  font-size: .875rem;
  color: var(--gray-600);
  padding: 4px 0;
  padding-left: 16px;
  position: relative;
}

.fc-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-size: .75rem;
}

/* ──── AI SECTION ──── */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.ai-col {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.ai-col-header {
  margin-bottom: 24px;
}

.ai-col-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #e2e8f0;
  margin-top: 10px;
}

.ai-badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  font-size: .75rem;
  font-weight: 700;
}

.badge-stat { background: rgba(22,119,255,.2); color: #60a5fa; }
.badge-deep { background: rgba(139,92,246,.2); color: #a78bfa; }
.badge-rule { background: rgba(82,196,26,.2); color: #86efac; }

.ai-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--dark-border);
}
.ai-item:last-child { border-bottom: none; }

.ai-item-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
  margin-top: 1px;
}

.ai-item strong {
  display: block;
  font-size: .9rem;
  color: #e2e8f0;
  font-weight: 600;
  margin-bottom: 2px;
}

.ai-item span {
  font-size: .8rem;
  color: var(--gray-400);
}

/* ──── MOBILE ──── */
.mobile-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.mobile-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

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

.mc-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--gray-100);
}

.mc-emoji {
  font-size: 2rem;
  background: var(--gray-50);
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mc-header h3 { font-size: 1rem; font-weight: 700; color: var(--gray-900); margin-bottom: 2px; }
.mc-count { font-size: .8rem; color: var(--gray-400); font-weight: 500; }

.mc-list li {
  padding: 7px 0;
  font-size: .875rem;
  color: var(--gray-600);
  border-bottom: 1px solid var(--gray-50);
}
.mc-list li:last-child { border-bottom: none; }

.mc-extra {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--gray-100);
}

.mc-extra p {
  font-size: .8rem;
  color: var(--gray-400);
  padding: 3px 0;
}

/* ──── INDUSTRY TABS ──── */
.industry-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.ind-tab {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,.7);
  border: 1px solid var(--gray-200);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--gray-600);
  transition: all var(--transition);
  backdrop-filter: blur(8px);
}

.ind-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: var(--shadow-blue);
}

.ind-tab:not(.active):hover {
  background: #fff;
  border-color: var(--primary);
  color: var(--primary);
}

.industry-panel {
  display: none;
}
.industry-panel.active { display: block; }

.ind-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.ind-tag {
  display: inline-block;
  background: var(--primary-bg);
  color: var(--primary);
  border-radius: var(--radius-sm);
  padding: 4px 12px;
  font-size: .8rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.ind-info h3 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.ind-info > p {
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 24px;
  font-size: .95rem;
}

.ind-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 24px;
}

.ind-feat {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .875rem;
  color: var(--gray-700);
  padding: 8px 12px;
  background: rgba(255,255,255,.7);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
}

.ind-feat-icon { font-size: 1rem; }

.ind-enable {
  font-size: .85rem;
  color: var(--gray-500);
}

.ind-enable code {
  background: var(--gray-100);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: .85em;
}

.ind-visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.vis-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.vis-label {
  font-size: .8rem;
  font-weight: 600;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 14px;
}

.big-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.num-sub {
  font-size: .85rem;
  color: var(--success);
  margin-top: 4px;
}

/* Mini charts */
.mini-chart { display: flex; flex-direction: column; gap: 8px; }

.bar-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .8rem;
  color: var(--gray-600);
}

.bar-row span:first-child { width: 48px; text-align: right; flex-shrink: 0; }
.bar-row span:last-child { width: 36px; flex-shrink: 0; }

.bar {
  flex: 1;
  height: 12px;
  border-radius: var(--radius-full);
  max-width: 100%;
  transition: width .8s ease;
}

/* Temperature display */
.temp-display {
  display: flex;
  gap: 10px;
}

.temp-item {
  flex: 1;
  text-align: center;
  padding: 10px 8px;
  border-radius: var(--radius-sm);
  background: var(--gray-50);
}

.temp-item.ok { border: 1px solid #b7eb8f; background: #f6ffed; }
.temp-item.warn { border: 1px solid #ffe58f; background: #fffbe6; }

.temp-val {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 2px;
}

.temp-name {
  font-size: .75rem;
  color: var(--gray-400);
}

/* Cert list */
.cert-list { display: flex; flex-direction: column; gap: 6px; }

.cert-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  font-size: .85rem;
}

.cert-item.valid { background: #f6ffed; color: #389e0d; }
.cert-item.expiring { background: #fffbe6; color: #d46b08; }
.cert-item.expired { background: #fff1f0; color: var(--danger); }

.cert-item span { font-size: .78rem; font-weight: 600; }

/* Report stats */
.report-stats {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.rs-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.rs-num {
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1;
}

.rs-item span:last-child {
  font-size: .78rem;
  color: var(--gray-400);
}

/* ──── INTEGRATIONS ──── */
.integration-grid {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 16px;
}

.int-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 20px 12px;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--transition);
  cursor: default;
}

.int-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-bg);
}

.int-icon { font-size: 1.8rem; }

.int-item span {
  font-size: .85rem;
  font-weight: 600;
  color: var(--gray-700);
}

.int-item small {
  font-size: .75rem;
  color: var(--gray-400);
}

/* ──── TECH STACK ──── */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.tech-col {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.tech-col-title {
  font-size: 1rem;
  font-weight: 700;
  color: #60a5fa;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--dark-border);
}

.tech-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--dark-border);
  font-size: .9rem;
}
.tech-item:last-child { border-bottom: none; }

.tech-name { color: #e2e8f0; font-weight: 500; }
.tech-ver {
  font-size: .78rem;
  background: rgba(96,165,250,.15);
  color: #60a5fa;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

/* ──── PRICING ──── */
.pricing-toggle {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  background: var(--gray-100);
  width: fit-content;
  margin: 0 auto 40px;
  padding: 4px;
  border-radius: var(--radius-full);
}

.ptoggle {
  padding: 8px 24px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--gray-500);
  transition: all var(--transition);
}

.ptoggle.active {
  background: #fff;
  color: var(--gray-900);
  box-shadow: var(--shadow-sm);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: start;
}

.pricing-grid.hidden { display: none; }

.src-grid {
  grid-template-columns: repeat(3, 1fr);
  max-width: 900px;
  margin: 0 auto;
}

.price-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}

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

.pc-popular {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary), var(--shadow-blue);
  transform: scale(1.02);
}

.pc-popular:hover { transform: scale(1.02) translateY(-4px); }

.pc-enterprise {
  background: linear-gradient(160deg, #fafaf5, #fff9e6);
  border-color: var(--accent);
}

.pc-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  padding: 3px 16px;
  border-radius: var(--radius-full);
  font-size: .78rem;
  font-weight: 700;
  white-space: nowrap;
}

.pc-tier {
  font-size: .85rem;
  font-weight: 700;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 10px;
}

.pc-price {
  margin-bottom: 6px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.pc-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--gray-900);
  line-height: 1;
}

.pc-unit {
  font-size: .85rem;
  color: var(--gray-400);
}

.pc-vehicles {
  font-size: .82rem;
  color: var(--gray-400);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--gray-100);
}

.pc-features { display: flex; flex-direction: column; gap: 8px; }

.pc-features li {
  font-size: .875rem;
  color: var(--gray-700);
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

.pc-features li.disabled { color: var(--gray-300); }

/* ──── CTA ──── */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, #0958d9 40%, #6d28d9 100%);
  padding: 96px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%; left: -10%;
  width: 60%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(255,255,255,.05) 0%, transparent 70%);
}

.cta-inner {
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta-inner h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}

.cta-inner p {
  font-size: 1.1rem;
  color: rgba(255,255,255,.75);
  margin-bottom: 36px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ──── FOOTER ──── */
.footer {
  background: var(--gray-900);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .nav-logo { color: #fff; margin-bottom: 14px; font-size: 1.05rem; }

.footer-brand .footer-logo { margin-bottom: 14px; }
.footer-brand .footer-logo .nav-logo-en { color: #e2e8f0; }
.footer-brand .footer-logo .nav-logo-zh { color: var(--gray-500); }

.footer-brand p {
  font-size: .875rem;
  color: var(--gray-400);
  line-height: 1.7;
  margin-bottom: 14px;
}

.footer-tech {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.footer-tech span {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  color: var(--gray-400);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: .78rem;
}

.footer-links h4 {
  font-size: .85rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.footer-links a {
  display: block;
  font-size: .875rem;
  color: var(--gray-400);
  padding: 5px 0;
  transition: color var(--transition);
}
.footer-links a:hover { color: #fff; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--dark-border);
  font-size: .82rem;
  color: var(--gray-500);
  flex-wrap: wrap;
  gap: 8px;
}

/* ──── ANIMATIONS ──── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* Scroll-reveal */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ──── RESPONSIVE ──── */
@media (max-width: 1100px) {
  .integration-grid { grid-template-columns: repeat(5, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-grid { grid-template-columns: 1fr; }
  .mobile-grid { grid-template-columns: 1fr; }
  .ind-content { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { padding: 20px 24px; }
  .stat { padding: 0 16px; }
  .stat-num { font-size: 1.6rem; }
  .src-grid { grid-template-columns: 1fr; max-width: 400px; }
}

@media (max-width: 700px) {
  .nav-links { display: none; }
  .btn-nav { display: none; }
  .hamburger { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 64px;
    left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    padding: 16px 24px;
    box-shadow: var(--shadow-lg);
  }

  .feature-grid { grid-template-columns: 1fr; }
  .integration-grid { grid-template-columns: repeat(3, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .ind-features { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 8px; padding: 20px; }
  .stat-divider { width: 40px; height: 1px; }
  .stat { padding: 8px 0; }
  .hero-actions { flex-direction: column; align-items: center; }
  .cta-actions { flex-direction: column; align-items: center; }
  .footer-bottom { flex-direction: column; text-align: center; }
}