:root {
  --brand: #2326c5;
  --brand-dark: #1716a4;
  --accent: #ffd21f;
  --ink: #151c45;
  --muted: #5c6387;
  --line: #dfe3f5;
  --soft: #f5f7ff;
  --white: #fff;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
  line-height: 1.75;
}

a { color: inherit; }
img { max-width: 100%; }
.shell { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(16px);
}

.site-header .shell {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--brand);
  font-size: 21px;
  font-weight: 900;
  text-decoration: none;
}

.brand img { width: 34px; height: 34px; }

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.nav a { text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--brand); }

.page-head {
  padding: 74px 0 48px;
  background: linear-gradient(180deg, #f7f8ff, #fff);
}

.eyebrow {
  color: var(--brand);
  font-size: 14px;
  font-weight: 900;
}

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

h1 {
  max-width: 900px;
  margin-bottom: 18px;
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1.12;
}

.lede {
  max-width: 820px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 19px;
}

.official-domain {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 26px;
  font-weight: 800;
}

.domain-value {
  border: 1px solid #bfc6ff;
  border-radius: 6px;
  background: #fff;
  padding: 8px 12px;
  color: var(--brand);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  text-decoration: none;
}

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--brand);
  border-radius: 6px;
  padding: 10px 18px;
  color: var(--brand);
  font-weight: 800;
  text-decoration: none;
}

.button.primary { background: var(--brand); color: #fff; }

.product-visual {
  margin: 8px auto 60px;
  text-align: center;
}

.product-visual img {
  width: min(100%, 980px);
  height: auto;
}

.band { padding: 56px 0; border-top: 1px solid var(--line); }
.band.soft { background: var(--soft); }
.band h2 { margin-bottom: 22px; font-size: clamp(26px, 4vw, 36px); line-height: 1.25; }

.prose { max-width: 820px; }
.prose p, .prose li { color: var(--muted); }
.prose strong { color: var(--ink); }

.fact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.fact {
  min-width: 0;
  background: #fff;
  padding: 24px;
}

.fact h3 { margin-bottom: 8px; font-size: 18px; }
.fact p { margin-bottom: 0; color: var(--muted); }

.warning {
  border-left: 5px solid #e03636;
  background: #fff4f4;
  padding: 22px 24px;
}

.warning h2, .warning h3 { color: #9f2020; }
.warning p:last-child { margin-bottom: 0; }

.domain-list { display: grid; gap: 12px; margin-top: 24px; }

.domain-row {
  display: grid;
  grid-template-columns: minmax(180px, .6fr) 1.4fr;
  gap: 20px;
  border: 1px solid var(--line);
  background: #fff;
  padding: 18px 20px;
}

.domain-row code { color: #9f2020; font-weight: 800; overflow-wrap: anywhere; }
.domain-row p { margin: 0; color: var(--muted); }

.steps { counter-reset: steps; display: grid; gap: 18px; padding: 0; list-style: none; }
.steps li { position: relative; padding-left: 54px; color: var(--muted); }
.steps li::before {
  position: absolute;
  top: 0;
  left: 0;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  content: counter(steps);
  counter-increment: steps;
  font-weight: 900;
}

.faq { border-top: 1px solid var(--line); padding: 20px 0; }
.faq h3 { margin-bottom: 8px; font-size: 18px; }
.faq p { margin-bottom: 0; color: var(--muted); }

.breadcrumb { padding-top: 24px; color: var(--muted); font-size: 13px; }
.breadcrumb a { color: var(--brand); }

.site-footer { background: var(--brand-dark); color: rgba(255,255,255,.82); padding: 32px 0; }
.site-footer .shell { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.site-footer a { color: #fff; }

@media (max-width: 760px) {
  .site-header .shell { min-height: 64px; }
  .nav { display: none; }
  .page-head { padding: 52px 0 36px; }
  .lede { font-size: 17px; }
  .fact-grid { grid-template-columns: 1fr; }
  .domain-row { grid-template-columns: 1fr; gap: 6px; }
  .band { padding: 42px 0; }
}