:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #173b44;
  background: #f5fbf9;
  font-synthesis: none;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background:
    radial-gradient(circle at 10% 5%, rgba(104, 195, 211, 0.18), transparent 29rem),
    radial-gradient(circle at 95% 8%, rgba(247, 173, 187, 0.20), transparent 26rem),
    linear-gradient(180deg, #fbfefd 0%, #eef8f5 100%);
}

a { color: inherit; }

.site-shell { width: min(1120px, calc(100% - 2rem)); margin: 0 auto; padding: 1.35rem 0 1.5rem; }
.site-header, footer { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: #123943;
  font-size: 1.2rem;
  font-weight: 850;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand img, .app-icon-wrap img { display: block; object-fit: cover; border-radius: 24%; }

.platform-pill {
  padding: 0.55rem 0.85rem;
  border: 1px solid #cce9e0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  color: #26736d;
  font-size: 0.82rem;
  font-weight: 750;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  align-items: center;
  gap: clamp(2rem, 6vw, 5.5rem);
  min-height: 620px;
  padding: 4.25rem 0 3.5rem;
}

.hero-copy { max-width: 680px; }
.eyebrow { margin: 0 0 0.8rem; color: #2c8c84; font-size: 0.76rem; font-weight: 850; letter-spacing: 0.14em; }
h1, h2, p { margin-top: 0; }

h1 {
  margin-bottom: 1.2rem;
  color: #123943;
  font-size: clamp(2.55rem, 6vw, 4.9rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.lead { max-width: 620px; margin-bottom: 1.6rem; color: #496a71; font-size: clamp(1rem, 2vw, 1.18rem); line-height: 1.7; }

.notice {
  display: flex;
  gap: 0.85rem;
  padding: 1rem 1.1rem;
  border: 1px solid #d6ebe5;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.80);
  box-shadow: 0 18px 48px rgba(27, 73, 78, 0.06);
}

.notice-icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  border-radius: 50%;
  background: #dff4ee;
  color: #277b73;
  font-weight: 850;
}

.notice strong { display: block; margin-bottom: 0.25rem; }
.notice p { margin: 0; color: #55737a; font-size: 0.93rem; line-height: 1.55; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.4rem; }

.primary-button, .secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1.1rem;
  border-radius: 14px;
  font-weight: 800;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.primary-button { background: #0e5865; color: #fff; box-shadow: 0 12px 28px rgba(14, 88, 101, 0.18); }
.secondary-button { border: 1px solid #c9dfda; background: #fff; color: #245961; }
.primary-button:hover, .secondary-button:hover { transform: translateY(-2px); }

.app-card {
  padding: 1.8rem;
  border: 1px solid rgba(204, 231, 224, 0.90);
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 32px 90px rgba(30, 88, 92, 0.14);
  text-align: center;
  backdrop-filter: blur(14px);
}

.app-icon-wrap { display: inline-block; padding: 8px; border-radius: 30px; background: linear-gradient(145deg, #e7f8f2, #fff1f3); }
.app-card h2 { margin: 1rem 0 0.25rem; font-size: 1.65rem; }
.app-card > p { color: #6a8489; }
.app-card ul { display: grid; gap: 0.7rem; margin: 1.35rem 0 0; padding: 1.2rem 0 0; border-top: 1px solid #e6efed; list-style: none; text-align: left; }
.app-card li { display: flex; gap: 0.55rem; color: #496970; font-size: 0.9rem; }
.app-card li span { color: #2c9588; font-weight: 900; }

.public-info {
  display: grid;
  grid-template-columns: minmax(230px, 0.65fr) minmax(0, 1.35fr);
  gap: 2rem;
  padding: clamp(1.4rem, 4vw, 2.2rem);
  border: 1px solid #dcece8;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.74);
}

.public-info h2 { margin-bottom: 0.7rem; font-size: clamp(1.45rem, 3vw, 2rem); }
.public-info > div > p:last-child { margin-bottom: 0; color: #59767c; line-height: 1.65; }
.link-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.8rem; }

.link-grid a {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  min-height: 138px;
  padding: 1rem;
  border: 1px solid #dcece7;
  border-radius: 18px;
  background: #fff;
  text-decoration: none;
}

.link-grid a:hover { border-color: #9bcfc4; box-shadow: 0 12px 30px rgba(27, 73, 78, 0.07); }
.link-grid strong { color: #174b54; }
.link-grid span { color: #668087; font-size: 0.86rem; line-height: 1.5; }

.english-note { display: flex; flex-wrap: wrap; gap: 0.35rem 0.7rem; margin: 1.2rem 0; padding: 0.9rem 1rem; border-radius: 14px; background: #edf5ff; color: #455f79; font-size: 0.86rem; }
footer { padding-top: 1.2rem; border-top: 1px solid #dce9e5; color: #668087; font-size: 0.85rem; }
footer a { text-decoration: none; }

@media (max-width: 850px) {
  .hero { grid-template-columns: 1fr; min-height: auto; padding: 4rem 0 3rem; }
  .app-card { max-width: 440px; }
  .public-info { grid-template-columns: 1fr; }
}

@media (max-width: 650px) {
  .site-shell { width: min(100% - 1.25rem, 1120px); padding-top: 0.8rem; }
  .platform-pill { max-width: 145px; text-align: center; }
  .hero { padding-top: 3rem; }
  h1 { font-size: clamp(2.35rem, 13vw, 3.5rem); }
  .link-grid { grid-template-columns: 1fr; }
  .link-grid a { min-height: auto; }
  footer { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  .primary-button, .secondary-button { transition: none; }
}