:root {
  --ink: #152549;
  --ink-soft: #3c4866;
  --muted: #6b7489;
  --bg: #f7f5f0;
  --surface: #ffffff;
  --line: #e4e0d6;
  --brand: #1f4396;
  --brand-dark: #152549;
  --brand-tint: #e8edf8;
  --accent: #e8a33d;
  --radius: 14px;
  --max: 1080px;
  --font: "Inter", "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--brand); }
a:hover { color: var(--brand-dark); }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(247, 245, 240, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 84px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 700; font-size: 19px; letter-spacing: -0.01em; }
.brand img { width: auto; height: 64px; }
.nav { display: flex; align-items: center; gap: 22px; }
.nav a { color: var(--ink-soft); text-decoration: none; font-size: 15px; font-weight: 500; }
.nav a:hover { color: var(--ink); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 20px; border-radius: 999px; font-weight: 600; font-size: 15px;
  text-decoration: none; border: 1px solid transparent; cursor: pointer; transition: background .15s, color .15s, border-color .15s;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); color: #fff; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink-soft); color: var(--ink); }
.nav .btn { padding: 9px 16px; color: #fff; }

/* ---------- hero ---------- */
.hero { padding: 72px 0 56px; }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--brand); background: var(--brand-tint); padding: 6px 12px; border-radius: 999px; }
.hero h1 { font-size: clamp(34px, 5.2vw, 56px); line-height: 1.08; letter-spacing: -0.025em; margin: 18px 0 18px; max-width: 16ch; }
.hero h1 em { font-style: normal; color: var(--brand); }
.hero p.lead { font-size: 19px; color: var(--ink-soft); max-width: 58ch; margin: 0 0 28px; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-grid { display: grid; grid-template-columns: 1.25fr 1fr; gap: 48px; align-items: center; }
.chat-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 22px; padding: 22px;
  box-shadow: 0 20px 50px -24px rgba(21, 37, 73, .28);
}
.chat-head { display: flex; align-items: center; gap: 10px; padding-bottom: 14px; border-bottom: 1px solid var(--line); margin-bottom: 14px; }
.chat-head .dot { width: 36px; height: 36px; border-radius: 50%; background: var(--brand-tint); display: grid; place-items: center; font-weight: 700; color: var(--brand); }
.chat-head b { display: block; font-size: 15px; }
.chat-head small { color: var(--muted); font-size: 13px; }
.bubble { max-width: 85%; padding: 10px 14px; border-radius: 16px; font-size: 15px; margin: 8px 0; }
.bubble.in { background: #f1efe9; border-bottom-left-radius: 4px; }
.bubble.out { background: var(--brand); color: #fff; margin-left: auto; border-bottom-right-radius: 4px; }
.bubble small { display: block; opacity: .7; font-size: 11px; margin-top: 2px; }

/* ---------- sections ---------- */
section { padding: 64px 0; }
.section-title { font-size: clamp(26px, 3.4vw, 36px); letter-spacing: -0.02em; line-height: 1.15; margin: 0 0 12px; }
.section-sub { color: var(--ink-soft); max-width: 62ch; margin: 0 0 36px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.card h3 { margin: 14px 0 8px; font-size: 19px; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--ink-soft); font-size: 16px; }
.icon { width: 44px; height: 44px; border-radius: 12px; background: var(--brand-tint); display: grid; place-items: center; color: var(--brand); }
.icon svg { width: 22px; height: 22px; }
.band { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step { position: relative; padding-top: 52px; }
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; top: 0; left: 0; width: 38px; height: 38px; border-radius: 50%;
  background: var(--ink); color: #fff; display: grid; place-items: center; font-weight: 700;
}
.step h3 { margin: 0 0 6px; font-size: 18px; }
.step p { margin: 0; color: var(--ink-soft); font-size: 16px; }
.compare { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; font-size: 16px; }
.compare th, .compare td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.compare thead th { background: #f1efe9; font-size: 14px; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-soft); }
.compare tr:last-child td { border-bottom: 0; }
.compare .yes { color: var(--brand); font-weight: 600; }
.compare .no { color: #a24a2a; font-weight: 600; }
.table-scroll { overflow-x: auto; }
.tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tag { background: var(--surface); border: 1px solid var(--line); padding: 8px 14px; border-radius: 999px; font-size: 15px; color: var(--ink-soft); }
.contact { background: var(--ink); color: #fff; border-radius: 24px; padding: 44px; display: grid; grid-template-columns: 1.3fr 1fr; gap: 32px; align-items: center; }
.contact h2 { margin: 0 0 10px; font-size: clamp(26px, 3.4vw, 34px); letter-spacing: -0.02em; }
.contact p { margin: 0; color: #c5cde0; }
.contact .lines { display: grid; gap: 12px; }
.contact a.line { display: flex; align-items: center; gap: 12px; padding: 14px 18px; border-radius: 14px; background: rgba(255,255,255,.07); color: #fff; text-decoration: none; font-weight: 600; }
.contact a.line:hover { background: rgba(255,255,255,.12); }
.contact a.line svg { width: 20px; height: 20px; flex: none; color: var(--accent); }

/* ---------- footer ---------- */
.site-footer { padding: 40px 0 48px; color: var(--muted); font-size: 14px; }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 18px; border-top: 1px solid var(--line); padding-top: 28px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 18px; }
.site-footer a { color: var(--ink-soft); text-decoration: none; }
.site-footer a:hover { color: var(--ink); text-decoration: underline; }

/* ---------- legal pages ---------- */
.legal { padding: 48px 0 24px; }
.legal .doc { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 44px; max-width: 820px; margin: 0 auto; }
.legal h1 { font-size: clamp(28px, 4vw, 40px); letter-spacing: -0.02em; line-height: 1.15; margin: 0 0 6px; }
.legal .updated { color: var(--muted); font-size: 14px; margin: 0 0 28px; }
.legal h2 { font-size: 21px; margin: 34px 0 10px; letter-spacing: -0.01em; }
.legal h3 { font-size: 17px; margin: 22px 0 6px; }
.legal p, .legal li { color: var(--ink-soft); font-size: 16px; }
.legal ul, .legal ol { padding-left: 22px; }
.legal li { margin: 4px 0; }
.legal .note { background: var(--brand-tint); border-radius: 12px; padding: 16px 18px; color: var(--ink); font-size: 15px; }
.legal .summary-en { border-top: 1px solid var(--line); margin-top: 40px; padding-top: 8px; }
.legal .summary-en h2 { font-size: 18px; }
.legal dl { display: grid; grid-template-columns: 180px 1fr; gap: 6px 16px; margin: 0; }
.legal dt { font-weight: 600; color: var(--ink); font-size: 15px; }
.legal dd { margin: 0; color: var(--ink-soft); font-size: 15px; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero-grid, .contact { grid-template-columns: 1fr; }
  .grid-3, .steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .nav a:not(.btn) { display: none; }
  .hero { padding: 44px 0 32px; }
  section { padding: 44px 0; }
  .grid-3, .grid-2, .steps { grid-template-columns: 1fr; }
  .contact { padding: 28px; }
  .legal .doc { padding: 24px 20px; }
  .legal dl { grid-template-columns: 1fr; }
  .legal dt { margin-top: 8px; }
}