:root {
  --color-primary-600: #1459FF;
  --color-primary-700: #0F43BF;
  --color-accent-cyan: #17B6FF;
  --color-text-strong: #0B1220;
  --color-text-normal: #374151;
  --color-text-muted: #6B7280;
  --color-surface-base: #F8FAFC;
  --color-surface-card: #FFFFFF;
  --color-border-subtle: #E5E7EB;
  --color-success: #12B76A;

  --font-family-base: "Noto Sans TC", "Noto Sans", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --text-h1: 700 56px/64px var(--font-family-base);
  --text-h2: 700 40px/48px var(--font-family-base);
  --text-h3: 700 28px/36px var(--font-family-base);
  --text-body-l: 400 20px/32px var(--font-family-base);
  --text-body-m: 400 16px/28px var(--font-family-base);
  --text-caption: 400 14px/22px var(--font-family-base);

  --space-4: 4px;
  --space-8: 8px;
  --space-12: 12px;
  --space-16: 16px;
  --space-24: 24px;
  --space-32: 32px;
  --space-40: 40px;
  --space-48: 48px;
  --space-64: 64px;
  --space-80: 80px;
  --space-96: 96px;

  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --shadow-card: 0 10px 24px rgba(11, 18, 32, 0.08);
  --container-width: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-text-normal);
  background:
    radial-gradient(circle at 12% 0%, rgba(20, 89, 255, 0.14), transparent 42%),
    radial-gradient(circle at 100% 20%, rgba(23, 182, 255, 0.12), transparent 36%),
    var(--color-surface-base);
  font: var(--text-body-m);
}

a {
  color: inherit;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  background: #fff;
  border: 2px solid var(--color-primary-600);
  padding: var(--space-8) var(--space-12);
}

.skip-link:focus {
  left: var(--space-12);
  top: var(--space-12);
}

.container {
  width: min(var(--container-width), calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-border-subtle);
  background: rgba(248, 250, 252, 0.92);
  backdrop-filter: blur(12px);
}

.nav-shell {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-24);
  min-height: 84px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-12);
  text-decoration: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  font: 700 14px/1 var(--font-family-base);
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-700));
}

.brand-text {
  color: var(--color-text-strong);
  font: 700 22px/1 var(--font-family-base);
}

.site-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-24);
}

.site-nav a {
  color: var(--color-text-normal);
  font: 600 15px/1.2 var(--font-family-base);
  text-decoration: none;
}

.nav-actions {
  display: flex;
  gap: var(--space-12);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border-subtle);
  border-radius: 10px;
  background: #fff;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  background: var(--color-text-strong);
}

.section {
  padding: 96px 0;
}

.eyebrow {
  margin: 0 0 var(--space-12);
  color: var(--color-primary-600);
  font: 700 12px/1.3 var(--font-family-base);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  color: var(--color-text-strong);
  font: var(--text-h1);
}

h2 {
  color: var(--color-text-strong);
  font: var(--text-h2);
}

h3 {
  color: var(--color-text-strong);
  font: var(--text-h3);
}

.section-desc {
  margin-top: var(--space-16);
  color: var(--color-text-muted);
  max-width: 70ch;
}

.hero {
  padding-top: 104px;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-32);
  align-items: center;
}

.hero-copy {
  grid-column: span 6;
}

.hero-media {
  position: relative;
  grid-column: span 6;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  background: var(--color-surface-card);
  box-shadow: var(--shadow-card);
}

.hero-media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.hero-lead {
  margin-top: var(--space-24);
  font: var(--text-body-l);
  color: var(--color-text-normal);
}

.hero-sub {
  margin-top: var(--space-16);
  color: var(--color-text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-12);
  margin-top: var(--space-32);
}

.hero-pills {
  margin: var(--space-24) 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-12);
}

.hero-pills li {
  border: 1px solid rgba(20, 89, 255, 0.2);
  border-radius: 999px;
  padding: var(--space-8) var(--space-16);
  background: rgba(20, 89, 255, 0.08);
  color: var(--color-primary-700);
  font: 600 14px/1.2 var(--font-family-base);
}

.hero-chip {
  position: absolute;
  border-radius: 999px;
  padding: var(--space-8) var(--space-12);
  background: rgba(11, 18, 32, 0.76);
  color: #fff;
  font: 600 12px/1.2 var(--font-family-base);
}

.chip-a {
  top: var(--space-16);
  left: var(--space-16);
}

.chip-b {
  top: var(--space-16);
  right: var(--space-16);
}

.chip-c {
  bottom: var(--space-16);
  left: var(--space-16);
  background: rgba(18, 183, 106, 0.84);
}

.section-head {
  margin-bottom: var(--space-32);
}

.metric-grid,
.card-grid,
.logo-grid,
.footer-grid {
  display: grid;
  gap: var(--space-24);
}

.metric-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric-card,
.card,
.demo-card,
.free-trial-shell {
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background: var(--color-surface-card);
  box-shadow: var(--shadow-card);
}

.metric-card {
  padding: var(--space-24);
}

.metric-card h3 {
  font: 700 22px/1.3 var(--font-family-base);
}

.metric-card p {
  margin-top: var(--space-12);
  color: var(--color-text-muted);
}

.products-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.industry-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  overflow: hidden;
}

.card img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.card-body {
  padding: var(--space-24);
}

.card-body p {
  margin-top: var(--space-12);
  color: var(--color-text-muted);
}

.card-link {
  display: inline-flex;
  margin-top: var(--space-16);
  color: var(--color-primary-600);
  text-decoration: none;
  font-weight: 700;
}

.industry-card {
  padding: var(--space-24);
}

.success-story-card {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
}

.demo-shell {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-24);
  align-items: stretch;
}

.demo-card {
  padding: var(--space-24);
}

.demo-card p + p {
  margin-top: var(--space-12);
}

.free-trial {
  background: linear-gradient(180deg, rgba(20, 89, 255, 0.04), rgba(20, 89, 255, 0.08));
}

.free-trial-shell {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  gap: var(--space-24);
  padding: var(--space-32);
}

.free-trial-actions {
  display: grid;
  gap: var(--space-12);
}

.logo-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.logo-grid span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 68px;
  border: 1px solid var(--color-border-subtle);
  border-radius: 12px;
  background: #fff;
  color: var(--color-text-muted);
  font: 700 13px/1.2 var(--font-family-base);
  letter-spacing: 0.08em;
}

.site-footer {
  padding: var(--space-64) 0 var(--space-24);
  margin-top: var(--space-40);
  border-top: 1px solid var(--color-border-subtle);
  background: #fff;
}

.footer-grid {
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
}

.footer-title {
  font: 700 24px/1.2 var(--font-family-base);
}

.site-footer h3 {
  margin-bottom: var(--space-12);
  font: 700 18px/1.2 var(--font-family-base);
}

.site-footer ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer li + li {
  margin-top: var(--space-8);
}

.site-footer a {
  text-decoration: none;
  color: var(--color-text-muted);
}

.footer-copy {
  margin: var(--space-24) 0 0;
  text-align: center;
  color: var(--color-text-muted);
  font: var(--text-caption);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 var(--space-24);
  border: 1px solid transparent;
  border-radius: 12px;
  text-decoration: none;
  font: 700 15px/1.2 var(--font-family-base);
  cursor: pointer;
}

.btn-sm {
  min-height: 40px;
  padding: 0 var(--space-16);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-700));
}

.btn-secondary {
  color: var(--color-primary-700);
  background: #fff;
  border-color: rgba(20, 89, 255, 0.32);
}

.btn-ghost {
  color: var(--color-text-normal);
  background: #fff;
  border-color: var(--color-border-subtle);
}

a:focus-visible,
button:focus-visible,
.btn:focus-visible {
  outline: 3px solid var(--color-accent-cyan);
  outline-offset: 2px;
}

@media (max-width: 1100px) {
  :root {
    --text-h1: 700 44px/52px var(--font-family-base);
    --text-h2: 700 32px/40px var(--font-family-base);
    --text-h3: 700 24px/32px var(--font-family-base);
  }

  .container {
    width: min(var(--container-width), calc(100% - 40px));
  }

  .nav-shell {
    grid-template-columns: auto auto;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    justify-self: end;
  }

  .site-nav {
    display: none;
    grid-column: 1 / -1;
    justify-content: flex-start;
    padding-bottom: var(--space-16);
  }

  .site-nav.is-open {
    display: flex;
  }

  .nav-actions {
    display: none;
  }

  .hero-copy,
  .hero-media,
  .products-grid,
  .industry-grid,
  .demo-shell,
  .free-trial-shell,
  .metric-grid,
  .footer-grid,
  .logo-grid,
  .success-story-card {
    grid-template-columns: 1fr;
    grid-column: 1 / -1;
  }

  .hero-grid {
    gap: var(--space-24);
  }

  .hero {
    padding-top: var(--space-64);
  }
}

@media (max-width: 768px) {
  :root {
    --text-h1: 700 36px/44px var(--font-family-base);
    --text-h2: 700 30px/38px var(--font-family-base);
    --text-h3: 700 22px/30px var(--font-family-base);
    --text-body-l: 400 18px/30px var(--font-family-base);
  }

  .container {
    width: calc(100% - 32px);
  }

  .section {
    padding: 72px 0;
  }

  .hero-actions,
  .free-trial-actions {
    grid-template-columns: 1fr;
  }

  .hero-actions .btn,
  .free-trial-actions .btn,
  .btn {
    width: 100%;
  }

  .hero-chip {
    font-size: 11px;
    padding: 6px 10px;
  }

  .free-trial-shell {
    padding: var(--space-24);
  }
}