/* ============================================================
   Catlaxy AI — New Website (v4 redesign)
   Source: Claude Design handoff 2026-04-18
   Tokens: brand-visual-system v2.0
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=Noto+Sans+SC:wght@400;500;700;900&display=swap');

:root {
  --brand-blue:  #0078FC;
  --brand-orange:#FF6B2B;
  --brand-rose:  #E8175D;

  --fg-1:   #111827;
  --fg-2:   #1A1A1A;
  --fg-3:   #374151;
  --fg-4:   #6B7280;
  --fg-5:   #9CA3AF;

  --bg-page:       #FFFFFF;
  --bg-card:       #E5E7EB;
  --bg-tag:        #F3F4F6;
  --bg-quote-blue: #EFF6FF;
  --bg-quote-peach:#FFF7ED;
  --divider:       #E5E7EB;
  --table-head:    #D1D5DB;

  --pal-a-1:#0078FC; --pal-a-2:#00C2FF; --pal-a-3:#4DA6FF; --pal-a-4:#80D4FF;
  --pal-b-1:#FF6B2B; --pal-b-2:#E8175D; --pal-b-3:#FFB347; --pal-b-4:#FF8DC7;
  --pal-d-1:#0078FC; --pal-d-2:#00C2FF; --pal-d-3:#0EA5E9; --pal-d-4:#06B6D4;

  --font-en:   'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-cn:   'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-sans: var(--font-cn), var(--font-en);

  --t-display: clamp(40px, 6vw, 72px);
  --t-h1:      clamp(28px, 3vw, 40px);
  --t-body:    16px;
  --t-caption: 12px;

  --w-bold:  700;
  --w-black: 900;

  --sp-md: 16px; --sp-lg: 24px; --sp-xl: 32px; --sp-2xl: 48px; --sp-3xl: 64px; --sp-4xl: 96px;
  --r-sm: 4px; --r-md: 8px; --r-lg: 12px; --r-xl: 16px; --r-pill: 9999px;

  --shadow-card:  0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-hover: 0 4px 12px rgba(0,0,0,.08);

  --dur-fast:   200ms;
  --dur-normal: 400ms;
  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-smooth:  cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: var(--t-body);
  line-height: 1.65;
  color: var(--fg-2);
  background: var(--bg-page);
  margin: 0;
}
h1, h2, h3, h4 { color: var(--fg-1); font-weight: var(--w-black); line-height: 1.25; margin: 0; }
p { margin: 0; color: var(--fg-2); }
a { color: var(--brand-blue); text-decoration: none; transition: opacity var(--dur-fast) var(--ease-default); }
a:hover { opacity: 0.7; }
img { display: block; max-width: 100%; }

/* ---------- layout ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; position: relative; }
.section--tight { padding: 64px 0; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px;
  border-radius: var(--r-pill);
  font-family: var(--font-sans);
  font-weight: var(--w-bold);
  font-size: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  transition: transform var(--dur-fast) var(--ease-default), background var(--dur-fast) var(--ease-default);
}
.btn:active { transform: scale(.97); }
.btn--primary { background: var(--brand-blue); color: #fff; }
.btn--primary:hover { background: #0066d6; opacity: 1; }
.btn--ghost { background: transparent; color: var(--fg-1); border-color: var(--divider); }
.btn--ghost:hover { background: var(--bg-tag); opacity: 1; }
.btn--ghost-dark { color: #E5E7EB; border-color: rgba(255,255,255,.2); background: transparent; }
.btn--ghost-dark:hover { background: rgba(255,255,255,.06); opacity: 1; }

/* ---------- icon circle (dashed) ---------- */
.icon-circle {
  width: 64px; height: 64px;
  border: 2px dashed rgba(0,120,252,.35);
  border-radius: 50%;
  background: #fff;
  color: var(--brand-blue);
  display: inline-flex; align-items: center; justify-content: center;
}
.icon-circle--lg { width: 88px; height: 88px; }
.icon-circle--dark { background: #0a1020; border-color: rgba(77,166,255,.5); color: var(--pal-a-3); }

/* ---------- eyebrow / accent ---------- */
.eyebrow {
  font-family: var(--font-en);
  font-size: 12px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--brand-blue); font-weight: 700;
  display: inline-flex; align-items: center; gap: 10px;
}
.eyebrow::before {
  content: ''; display: inline-block;
  width: 28px; height: 2px; background: currentColor;
}
.eyebrow--on-dark { color: var(--pal-a-3); }

.section-title {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 900; color: var(--fg-1);
  line-height: 1.15; letter-spacing: -0.01em;
  margin: 16px 0 12px;
  max-width: 780px;
}
.section-sub {
  font-size: 17px; color: var(--fg-3);
  max-width: 640px; line-height: 1.7;
}
.accent-subtitle {
  display: flex; align-items: center; gap: 14px;
  font-weight: 700; color: var(--fg-1); font-size: 13px;
}
.accent-subtitle::before {
  content: ''; width: 4px; height: 28px;
  background: var(--brand-blue); border-radius: 2px;
}

/* ---------- generic feat card ---------- */
.feat-card {
  background: #fff;
  border: 1px solid var(--divider);
  border-radius: var(--r-lg);
  padding: 40px;
  transition: transform var(--dur-normal) var(--ease-smooth),
              box-shadow var(--dur-normal) var(--ease-smooth),
              border-color var(--dur-normal) var(--ease-smooth);
}
.feat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.feat-card--dark {
  background: #111827; border-color: transparent; color: #E5E7EB;
  position: relative; overflow: hidden;
}
.feat-card--dark::after {
  content: ''; position: absolute; right:-60px; top:-60px;
  width: 260px; height: 260px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,120,252,.5), transparent 65%);
  pointer-events: none;
}
.feat-card--dark h3 { color: #fff; }
.feat-card--dark p { color: #D1D5DB; }

.feat-list { list-style: none; padding: 0; margin: 0 0 28px; display: grid; gap: 10px; }
.feat-list li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: #1A1A1A; }
.feat-card--dark .feat-list li { color: #E5E7EB; }

/* ---------- quote ---------- */
.quote {
  padding: 20px 24px;
  background: var(--bg-quote-blue);
  border-left: 4px solid var(--brand-blue);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  color: var(--fg-2);
}

/* ---------- nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--divider);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 16px 24px;
  display: flex; align-items: center; gap: 32px;
}
.nav-logo { height: 24px; width: auto; display: block; }
.nav-links { display: flex; gap: 28px; }
.nav-link {
  font-size: 14px; color: var(--fg-3); font-weight: 500;
  cursor: pointer; background: none; border: none;
  font-family: inherit;
  transition: color var(--dur-fast) var(--ease-default);
}
.nav-link:hover, .nav-link.active { color: var(--fg-1); }
.nav-right { margin-left: auto; display: flex; gap: 14px; align-items: center; }
.nav-en {
  font-family: var(--font-en); font-size: 12px; letter-spacing: 1px;
  color: var(--fg-4); font-weight: 600;
}
.nav-cta { padding: 10px 18px; font-size: 13px; }

/* ---------- hero ---------- */
.hero { position: relative; padding: 140px 0 96px; overflow: hidden; }
.hero-kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-en); font-size: 12px; letter-spacing: 2px;
  text-transform: uppercase; font-weight: 700; color: var(--brand-blue);
  padding: 8px 16px; border-radius: var(--r-pill);
  background: rgba(0,120,252,.08);
}
.hero-title {
  font-size: clamp(44px, 6.5vw, 84px);
  font-weight: 900; line-height: 1.06;
  color: var(--fg-1);
  letter-spacing: -0.02em;
  margin: 22px 0 24px;
  max-width: 880px;
}
.hero-sub {
  font-size: 18px; color: var(--fg-3);
  line-height: 1.7; max-width: 600px; margin-bottom: 36px;
}
.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- splash ink (decorative bg) ---------- */
.splash-ink {
  position: absolute; inset: 0;
  pointer-events: none;
  z-index: 0;
}
.splash-blob {
  position: absolute;
  border-radius: 42% 58% 48% 52% / 55% 45% 60% 40%;
  animation: drift 10s infinite alternate var(--ease-smooth);
  will-change: transform, filter;
  filter: url(#sf) blur(0.4px);
}
@keyframes drift {
  0%   { transform: translate(0,0) scale(.95); }
  100% { transform: translate(30px,-20px) scale(1.1); }
}
.hero > .container { position: relative; z-index: 1; }

/* ---------- metric strip ---------- */
.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--divider);
  border-bottom: 1px solid var(--divider);
  padding: 40px 0;
  margin-top: 96px;
  position: relative;
}
.metric { padding: 0 32px; border-right: 1px solid var(--divider); }
.metric:last-child { border-right: 0; }
.metric-num {
  font-family: var(--font-en);
  font-weight: 900;
  font-size: 56px;
  letter-spacing: -3px;
  color: var(--brand-blue);
  line-height: 1;
}
.metric-num .unit { font-size: 32px; letter-spacing: -1px; }
.metric-label { margin-top: 10px; color: var(--fg-3); font-size: 14px; }

/* ---------- products section ---------- */
.products-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 48px;
}
.product-head-lg {
  font-size: 28px; font-weight: 900; color: var(--fg-1);
  line-height: 1.25; margin: 12px 0; max-width: 380px;
}
.feat-card--dark .product-head-lg { color: #fff; }
.product-sub {
  color: var(--fg-3); font-size: 15px; line-height: 1.7; margin-bottom: 24px;
}

/* ---------- agents: vs. pair ---------- */
.vs-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: stretch;
  margin-top: 48px;
}
.vs-card {
  padding: 32px;
  border-radius: var(--r-xl);
  border: 1px solid var(--divider);
}
.vs-card--muted { background: var(--bg-tag); color: var(--fg-4); }
.vs-card--muted .vs-head { color: var(--fg-4); }
.vs-card--brand {
  background: var(--fg-1);
  border-color: transparent;
  color: #E5E7EB;
  position: relative;
  overflow: hidden;
}
.vs-card--brand::after {
  content: ''; position: absolute; right:-40px; top:-40px;
  width: 220px; height: 220px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,120,252,.45), transparent 65%);
  pointer-events: none;
}
.vs-title {
  font-size: 13px; letter-spacing: 2px; text-transform: uppercase;
  font-family: var(--font-en); font-weight: 700;
  margin-bottom: 18px; opacity: 0.7;
}
.vs-card--brand .vs-title { color: var(--pal-a-2); opacity: 1; }
.vs-head { font-size: 24px; font-weight: 900; line-height: 1.3; margin-bottom: 24px; position: relative; }
.vs-card--brand .vs-head { color: #fff; }
.vs-rows { display: grid; grid-template-columns: 96px 1fr; gap: 14px 18px; font-size: 14px; line-height: 1.6; position: relative; }
.vs-row-key { opacity: .55; font-weight: 500; }
.vs-card--brand .vs-row-key { color: var(--pal-a-3); opacity: 1; }

/* ---------- agent pillars ---------- */
.agent-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 64px;
}
.agent-card {
  background: #fff;
  border: 1px solid var(--divider);
  border-radius: var(--r-lg);
  padding: 24px;
  transition: all var(--dur-normal) var(--ease-smooth);
}
.agent-card:hover {
  border-color: var(--brand-blue);
  box-shadow: 0 8px 24px rgba(0,120,252,.08);
  transform: translateY(-3px);
}
.agent-head { font-weight: 900; color: var(--fg-1); font-size: 16px; margin: 16px 0 8px; }
.agent-desc { font-size: 13px; color: var(--fg-3); line-height: 1.65; }

/* ---------- knowledgeos table ---------- */
.kos-table {
  margin-top: 48px;
  background: #fff;
  border: 1px solid var(--divider);
  border-radius: 16px;
  overflow: hidden;
  position: relative;
}
.kos-row {
  display: grid;
  grid-template-columns: 180px 1fr 1.2fr;
  padding: 24px;
  border-top: 1px solid var(--divider);
  align-items: start;
}
.kos-row--head {
  background: #F3F4F6;
  padding: 16px 24px;
  font-size: 12px;
  font-weight: 700;
  color: var(--fg-4);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-family: var(--font-en);
  border-top: none;
}
.kos-row--head .kos-emph { color: var(--brand-blue); }
.kos-dim { font-weight: 700; color: var(--fg-1); font-size: 15px; }
.kos-a   { color: var(--fg-4); font-size: 14px; line-height: 1.7; }
.kos-b   { color: var(--fg-2); font-size: 14px; line-height: 1.7; }
.kos-b strong { display: block; color: var(--fg-1); margin-bottom: 4px; font-weight: 700; }
.kos-b em { font-style: normal; color: var(--brand-blue); font-size: 13px; }

/* ---------- cases ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 48px;
}
.case-card {
  background: #fff;
  border: 1px solid var(--divider);
  border-radius: var(--r-xl);
  padding: 28px;
  display: flex; flex-direction: column; gap: 18px; min-height: 280px;
  transition: transform var(--dur-normal) var(--ease-smooth),
              box-shadow var(--dur-normal) var(--ease-smooth),
              border-color var(--dur-normal) var(--ease-smooth);
  position: relative; overflow: hidden;
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.case-kicker {
  font-family: var(--font-en); font-size: 11px; letter-spacing: 1.8px;
  text-transform: uppercase; color: var(--fg-5); font-weight: 700;
}
.case-metric {
  font-family: var(--font-en); font-weight: 900; letter-spacing: -2px;
  color: var(--brand-blue); font-size: 44px; line-height: 1;
}
.case-metric--warm { color: var(--brand-orange); }
.case-metric--rose { color: var(--brand-rose); }
.case-metric .unit { font-size: 22px; letter-spacing: -1px; }
.case-title { font-size: 19px; font-weight: 900; color: var(--fg-1); line-height: 1.35; }
.case-desc { font-size: 14px; color: var(--fg-3); line-height: 1.7; }
.case-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: auto; }
.case-tag { font-size: 11px; color: var(--fg-4); background: var(--bg-tag); padding: 4px 10px; border-radius: var(--r-pill); }

/* ---------- contact ---------- */
.contact-wrap {
  display: grid; grid-template-columns: 1.4fr 1fr;
  gap: 0;
  background: var(--fg-1);
  border-radius: var(--r-xl);
  overflow: hidden;
  position: relative;
}
.contact-left { padding: 56px 48px; color: #fff; position: relative; overflow: hidden; }
.contact-left > .splash-ink { opacity: 0.4; }
.contact-left > .contact-body { position: relative; z-index: 1; }
.contact-title { color: #fff; font-size: 40px; font-weight: 900; line-height: 1.2; margin: 16px 0 12px; max-width: 440px; }
.contact-sub { color: #D1D5DB; font-size: 16px; line-height: 1.7; max-width: 440px; margin-bottom: 32px; }
.contact-items { display: flex; flex-direction: column; gap: 14px; margin-bottom: 32px; }
.contact-item { display: flex; gap: 12px; align-items: center; }
.contact-item .icon-circle { width: 44px; height: 44px; border-color: rgba(77,166,255,.4); background: transparent; color: var(--pal-a-3); }
.contact-item-label {
  font-size: 12px; color: #9CA3AF; letter-spacing: 1px;
  text-transform: uppercase; font-family: var(--font-en);
}
.contact-item-value { color: #fff; font-size: 16px; font-weight: 600; }
.contact-item-value a { color: #fff; }

.contact-right {
  padding: 48px;
  background: #0a1020;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  border-left: 1px solid rgba(255,255,255,.08);
}
.qr-caption {
  font-size: 12px; font-family: var(--font-en);
  letter-spacing: 2px; text-transform: uppercase;
  color: #6B7280; margin-bottom: 16px;
}
.qr-image { width: 180px; height: 180px; border-radius: var(--r-md); background: #fff; padding: 10px; }
.qr-foot { margin-top: 16px; color: #9CA3AF; font-size: 13px; }

/* ---------- footer ---------- */
.footer {
  background: #fff;
  border-top: 1px solid var(--divider);
  padding: 56px 0 40px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
  margin-bottom: 40px;
}
.footer h4 {
  font-size: 12px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--fg-5); margin-bottom: 14px; font-weight: 700;
  font-family: var(--font-en);
}
.footer a { display: block; font-size: 13px; color: var(--fg-3); margin-bottom: 8px; }
.footer-brand p { font-size: 14px; color: #6B7280; line-height: 1.7; max-width: 360px; }
.footer-logo { height: 22px; margin-bottom: 16px; }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  border-top: 1px solid var(--divider); padding-top: 24px;
  font-size: 12px; color: var(--fg-5);
  flex-wrap: wrap; gap: 10px;
}
.footer-bottom a { display: inline; color: var(--fg-5); margin: 0; }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .nav-links { display: none; }
  .metric-strip { grid-template-columns: repeat(2, 1fr); gap: 32px 0; }
  .metric:nth-child(2) { border-right: 0; }
  .products-grid,
  .vs-pair { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr 1fr; }
  .agent-grid { grid-template-columns: 1fr 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .kos-row, .kos-row--head { grid-template-columns: 1fr; gap: 8px; }
}
@media (max-width: 620px) {
  .case-grid, .agent-grid, .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .hero { padding: 120px 0 72px; }
  .contact-left, .contact-right { padding: 36px 24px; }
  .contact-title { font-size: 30px; }
  .vs-card, .feat-card { padding: 24px; }
  .vs-rows { grid-template-columns: 72px 1fr; }
}