:root {
  color-scheme: light;
  --paper: #fffaf0;
  --paper-strong: #fffdf7;
  --ink: #24313a;
  --muted: #61727c;
  --sky: #75c8ec;
  --sky-soft: #dff4fd;
  --aqua: #8eddd2;
  --orange: #ff8c42;
  --orange-soft: #ffe2c9;
  --yellow: #ffd45a;
  --line: rgba(65, 108, 127, 0.16);
  --shadow: 0 22px 70px rgba(41, 93, 116, 0.13);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Hiragino Sans", "Yu Gothic", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 0%, rgba(117, 200, 236, 0.22), transparent 34rem),
    radial-gradient(circle at 92% 18%, rgba(255, 140, 66, 0.15), transparent 30rem),
    var(--paper);
  line-height: 1.75;
}

a { color: inherit; }

.wrap {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: rgba(255, 250, 240, 0.78);
  border-bottom: 1px solid var(--line);
}

.nav {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(55, 115, 142, 0.18);
}

.nav-links { display: flex; gap: 18px; font-size: 14px; font-weight: 650; }
.nav-links a { text-decoration: none; color: var(--muted); }
.nav-links a:hover { color: var(--orange); }

.hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  align-items: center;
  gap: 72px;
  padding: 88px 0 76px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  padding: 6px 11px;
  border-radius: 999px;
  background: var(--sky-soft);
  color: #23799d;
  font-size: 13px;
  font-weight: 750;
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
}

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.035em; }

h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(44px, 6.5vw, 76px);
  font-weight: 850;
}

.accent { color: var(--orange); }

.lead {
  max-width: 650px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2.2vw, 21px);
  font-weight: 500;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 15px;
  text-decoration: none;
  font-weight: 750;
  border: 1px solid var(--line);
  background: var(--paper-strong);
}

.button.primary {
  color: white;
  border-color: transparent;
  background: linear-gradient(135deg, var(--orange), #ffad58);
  box-shadow: 0 10px 30px rgba(255, 140, 66, 0.28);
}

.availability { margin-top: 16px; color: var(--muted); font-size: 13px; }

.icon-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 480px;
}

.icon-stage::before,
.icon-stage::after {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.icon-stage::before { width: 420px; height: 420px; background: var(--sky-soft); }
.icon-stage::after { width: 315px; height: 315px; border: 3px dashed rgba(255, 140, 66, 0.38); transform: rotate(9deg); }

.app-icon {
  position: relative;
  z-index: 2;
  width: min(360px, 76vw);
  border-radius: 25%;
  box-shadow: var(--shadow);
  transform: rotate(-2deg);
}

.section { padding: 88px 0; }
.section h2 { margin: 0 0 14px; font-size: clamp(32px, 4.6vw, 52px); }
.section-intro { max-width: 720px; margin: 0 0 38px; color: var(--muted); font-size: 18px; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

.card {
  min-height: 230px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 253, 247, 0.76);
  box-shadow: 0 12px 40px rgba(41, 93, 116, 0.07);
}

.card:nth-child(2n) { transform: translateY(12px); }

.card-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: var(--sky-soft);
  color: #23799d;
  font-size: 21px;
  font-weight: 800;
}

.card:nth-child(3n+2) .card-icon { background: var(--orange-soft); color: #c95c18; }
.card:nth-child(3n) .card-icon { background: #e3f7ef; color: #26816d; }
.card h3 { margin: 18px 0 8px; font-size: 20px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

.privacy-panel {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: center;
  padding: 30px;
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(223, 244, 253, 0.92), rgba(227, 247, 239, 0.92));
  border: 1px solid rgba(70, 152, 168, 0.14);
}

.lock { font-size: 46px; }
.privacy-panel h2 { margin: 0 0 8px; font-size: clamp(28px, 4vw, 42px); }
.privacy-panel p { margin: 0; color: var(--muted); }

.dialects { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.dialects span { padding: 8px 13px; border-radius: 999px; background: var(--paper-strong); border: 1px solid var(--line); font-size: 14px; font-weight: 700; }

.page-main { padding: 70px 0 110px; }
.page-main h1 { font-size: clamp(40px, 6vw, 64px); }
.page-main h2 { margin-top: 44px; font-size: 25px; }
.page-main p, .page-main li { color: var(--muted); }
.page-main .updated { margin-top: 12px; font-size: 14px; }
.page-main .content { max-width: 780px; }

.notice {
  margin: 28px 0;
  padding: 18px 20px;
  border-radius: 16px;
  border-left: 5px solid var(--orange);
  background: var(--orange-soft);
}

footer { padding: 34px 0 48px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.footer-row { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 16px; }
.footer-links a { text-decoration: none; }

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; gap: 22px; padding-top: 64px; }
  .icon-stage { min-height: 390px; order: -1; }
  .icon-stage::before { width: 340px; height: 340px; }
  .icon-stage::after { width: 260px; height: 260px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .card:nth-child(2n) { transform: none; }
}

@media (max-width: 560px) {
  .wrap { width: min(100% - 26px, 1080px); }
  .nav { min-height: 58px; }
  .nav-links a:first-child { display: none; }
  .hero { min-height: auto; padding: 42px 0 58px; }
  .icon-stage { min-height: 305px; }
  .icon-stage::before { width: 275px; height: 275px; }
  .icon-stage::after { width: 215px; height: 215px; }
  .app-icon { width: 245px; }
  h1 { font-size: 44px; }
  .feature-grid { grid-template-columns: 1fr; }
  .privacy-panel { grid-template-columns: 1fr; gap: 12px; }
  .section { padding: 62px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}