:root {
  --ink: #102b4f;
  --muted: #53677e;
  --blue: #07389c;
  --blue-dark: #052a75;
  --mint: #bfe9da;
  --cream: #fffaf0;
  --line: #dce5eb;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 20%, rgba(191, 233, 218, 0.7), transparent 30rem),
    linear-gradient(155deg, #f7fbff 0%, var(--cream) 64%, #f3ede1 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", sans-serif;
  min-height: 100vh;
}

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

.site-header {
  min-height: 92px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1.1rem;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.brand img { border-radius: 11px; box-shadow: 0 5px 16px rgba(7, 56, 156, 0.22); }
nav { display: flex; gap: 28px; }
nav a { color: var(--muted); font-size: 0.94rem; font-weight: 700; text-decoration: none; }
nav a:hover, nav a:focus-visible, nav a[aria-current="page"] { color: var(--blue); }

.hero {
  min-height: calc(100vh - 92px);
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  align-items: center;
  gap: clamp(40px, 8vw, 100px);
  padding: 48px 0 110px;
}

.eyebrow { margin: 0 0 20px; color: var(--blue); font-size: 0.84rem; font-weight: 800; letter-spacing: 0.12em; }

h1 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(2.75rem, 6vw, 5.25rem);
  line-height: 1.08;
  letter-spacing: -0.055em;
}

.lead {
  max-width: 680px;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 2;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 0.94rem;
  font-weight: 800;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.button:hover { transform: translateY(-2px); }
.button:focus-visible { outline: 3px solid #81a9ff; outline-offset: 3px; }
.primary { color: white; background: var(--blue); box-shadow: 0 12px 28px rgba(7, 56, 156, 0.24); }
.primary:hover { background: var(--blue-dark); box-shadow: 0 16px 34px rgba(7, 56, 156, 0.3); }
.secondary { color: var(--blue); background: rgba(255, 255, 255, 0.72); border: 1px solid var(--line); }

.icon-stage { position: relative; display: grid; place-items: center; min-height: 420px; }
.icon-halo { position: absolute; width: 390px; height: 390px; border-radius: 50%; background: rgba(191, 233, 218, 0.62); filter: blur(2px); }
.app-icon { position: relative; width: min(300px, 75vw); height: auto; border-radius: 22%; box-shadow: 0 34px 80px rgba(5, 42, 117, 0.3); transform: rotate(2deg); }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding: 0 0 110px; }

.feature-grid article {
  padding: 30px;
  border: 1px solid rgba(220, 229, 235, 0.92);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 16px 50px rgba(16, 43, 79, 0.06);
}

.feature-mark { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 12px; color: var(--blue); background: var(--mint); font-weight: 900; }
.feature-grid h2 { margin: 22px 0 10px; font-size: 1.17rem; }
.feature-grid p { margin: 0; color: var(--muted); font-size: 0.94rem; line-height: 1.8; }

.content-shell { width: min(880px, 100%); margin: 0 auto; padding: 90px 0 120px; }
.page-intro { margin-bottom: 68px; }
.page-intro h1 { max-width: 780px; font-size: clamp(3rem, 8vw, 6rem); }
.page-intro .lead { max-width: 680px; }
.updated-at { margin-top: 24px; color: var(--muted); font-size: 0.88rem; }

.section-kicker { margin: 0 0 12px; color: var(--blue); font-size: 0.76rem; font-weight: 900; letter-spacing: 0.14em; }

.contact-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  padding: 34px;
  border-radius: 26px;
  color: #fff;
  background: var(--blue);
  box-shadow: 0 24px 60px rgba(7, 56, 156, 0.2);
}

.contact-card .section-kicker { color: #bfe9da; }
.contact-card h2 { margin: 0 0 10px; font-size: 1.65rem; }
.contact-card p:last-child { margin: 0; color: rgba(255, 255, 255, 0.78); line-height: 1.7; }

.email-link {
  flex: 0 0 auto;
  padding: 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.1);
  font-size: 0.9rem;
  font-weight: 800;
  text-decoration: none;
}

.email-link:hover, .email-link:focus-visible { background: rgba(255, 255, 255, 0.18); }
.support-note { margin: 18px 0 74px; padding: 22px 26px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255, 255, 255, 0.7); }
.support-note strong { display: block; margin-bottom: 6px; color: var(--ink); }
.support-note p { margin: 0; color: var(--muted); font-size: 0.9rem; line-height: 1.75; }

.faq-section h2 { margin: 0 0 24px; font-size: clamp(1.8rem, 4vw, 2.6rem); }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 24px 42px 24px 0; cursor: pointer; font-size: 1.02rem; font-weight: 800; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; top: 21px; right: 6px; color: var(--blue); font-size: 1.35rem; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: -4px 42px 24px 0; color: var(--muted); line-height: 1.85; }

.policy-list { border-top: 1px solid var(--line); }
.policy-list section { display: grid; grid-template-columns: 48px 1fr; gap: 18px; padding: 34px 0; border-bottom: 1px solid var(--line); }
.policy-list section > span { padding-top: 4px; color: var(--blue); font-size: 0.78rem; font-weight: 900; letter-spacing: 0.1em; }
.policy-list h2 { margin: 0 0 12px; font-size: 1.25rem; }
.policy-list p { margin: 0; color: var(--muted); line-height: 1.95; }

.policy-contact { margin-top: 48px; padding: 30px; border: 1px solid var(--line); border-radius: 22px; background: rgba(255, 255, 255, 0.72); }
.policy-contact h2 { margin: 0 0 14px; font-size: 1.2rem; }
.policy-contact a { color: var(--blue); font-weight: 800; overflow-wrap: anywhere; }
.mobile-break { display: none; }

.site-footer { min-height: 110px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-top: 1px solid rgba(16, 43, 79, 0.12); color: var(--muted); font-size: 0.84rem; }
.site-footer p { margin: 0; }
.site-footer div { display: flex; gap: 20px; }
.site-footer a { text-decoration: none; }
.site-footer a:hover, .site-footer a:focus-visible { color: var(--blue); }

.not-found { min-height: 100vh; display: grid; align-content: center; justify-items: start; }
.not-found .button { margin-top: 32px; }

@media (max-width: 760px) {
  .site-shell { width: min(100% - 28px, 620px); }
  .site-header { min-height: 80px; }
  nav { gap: 14px; }
  nav a { font-size: 0.82rem; }
  .hero { min-height: 0; grid-template-columns: 1fr; padding: 56px 0 80px; }
  .hero-copy { order: 2; }
  .icon-stage { order: 1; min-height: 260px; }
  .icon-halo { width: 260px; height: 260px; }
  .app-icon { width: 210px; }
  h1 { font-size: clamp(2.6rem, 13vw, 4rem); }
  .lead { line-height: 1.85; }
  .button { width: 100%; }
  .feature-grid { grid-template-columns: 1fr; padding-bottom: 80px; }
  .content-shell { padding: 64px 0 88px; }
  .page-intro { margin-bottom: 48px; }
  .page-intro h1 { font-size: clamp(2.8rem, 14vw, 4.2rem); }
  .contact-card { align-items: stretch; flex-direction: column; padding: 26px; }
  .email-link { text-align: center; overflow-wrap: anywhere; }
  .policy-list section { grid-template-columns: 36px 1fr; gap: 10px; }
  .mobile-break { display: inline; }
  .site-footer { align-items: flex-start; flex-direction: column; justify-content: center; padding: 30px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}