:root {
  color-scheme: light;
  --paper: #f2f6f7;
  --white: #fff;
  --ink: #152d3e;
  --muted: #456170;
  --line: #cbd9dd;
  --fjord: #18384a;
  --signal: #aa401b;
  --sun: #ff9e65;
  --radius: 16px;
  --body: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  --display: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  --utility: ui-monospace, Menlo, Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: 22px; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 16px/1.7 var(--body); }
img { display: block; max-width: 100%; height: auto; }
figure, p, h1, h2, dl, dd { margin: 0; }
a { color: inherit; text-underline-offset: 4px; }
a:focus-visible { outline: 3px solid var(--signal); outline-offset: 5px; border-radius: 4px; }
.wrap { width: min(1120px, calc(100% - 72px)); margin-inline: auto; }
.skip { position: absolute; z-index: 3; top: 12px; left: 12px; padding: 8px 14px; color: var(--white); background: var(--fjord); transform: translateY(-180%); }
.skip:focus { transform: translateY(0); }
.site-head { border-bottom: 1px solid var(--line); }
.head-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 750; line-height: 1.23; white-space: nowrap; }
.brand img { flex: 0 0 44px; border-radius: 12px; }
.brand small { display: block; font-size: 12px; color: var(--muted); letter-spacing: .08em; }
.site-head nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: clamp(8px, 2.5vw, 30px); }
.site-head nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 4px; font-size: 14px; font-weight: 620; text-decoration: none; }
.site-head nav a:hover, .site-foot a:hover { color: var(--signal); text-decoration: underline; }
.hero { display: grid; grid-template-columns: .82fr 1.18fr; gap: clamp(28px, 5vw, 76px); align-items: center; padding-block: clamp(42px, 6vw, 87px); }
.eyebrow { color: var(--muted); font: 650 12px/1.55 var(--utility); letter-spacing: .1em; }
.signal { display: inline-block; width: 9px; height: 9px; margin-inline-end: 4px; border-radius: 100%; background: var(--signal); }
h1, h2 { font-family: var(--display); font-weight: 760; letter-spacing: -.052em; line-height: 1.12; }
h1 { margin-block: 19px 22px; font-size: clamp(54px, 6.25vw, 86px); }
h1 em { color: var(--signal); font-style: normal; }
.hero-intro { max-width: 31ch; color: var(--muted); font-size: clamp(16px, 1.65vw, 19px); }
.button { display: inline-flex; align-items: center; gap: 19px; min-height: 48px; margin-top: 26px; padding: 10px 17px; border-radius: 8px; color: var(--white); background: var(--fjord); font-size: 15px; font-weight: 650; text-decoration: none; }
.button:hover { background: #24556c; }
.button span { color: #ffd0af; }
.hero-image { padding: 8px 8px 0; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 16px 32px #173a4b12; }
.hero-image img { width: 100%; aspect-ratio: 1.46; object-fit: cover; object-position: 55% 52%; border-radius: 10px; }
.hero-image figcaption { display: flex; justify-content: space-between; align-items: center; gap: 10px; min-height: 40px; padding: 4px 8px; color: var(--muted); font: 650 11px/1.4 var(--utility); letter-spacing: .075em; }
.terrain { display: grid; grid-template-columns: .72fr 1.28fr; align-items: center; gap: 24px; padding: clamp(24px, 4vw, 48px); background: var(--fjord); color: var(--white); border-radius: var(--radius); }
.terrain h2, .features h2, .support h2 { margin-top: 9px; font-size: clamp(36px, 5vw, 57px); }
.terrain .eyebrow { color: #ffbd96; }
.terrain-copy > p:last-child { margin-top: 14px; max-width: 34ch; color: #d7e7ed; }
.terrain-figure svg { display: block; width: 100%; height: auto; }
.features { display: grid; grid-template-columns: 1fr minmax(260px, .75fr); gap: clamp(26px, 7vw, 98px); align-items: center; padding-block: clamp(55px, 8vw, 105px); }
.feature-list { margin-top: 22px; }
.feature-list > div { border-top: 1px solid var(--line); padding-block: 13px; }
.feature-list > div:last-child { border-bottom: 1px solid var(--line); }
.feature-list dt { font-size: 19px; font-weight: 730; }
.feature-list dd { margin-top: 2px; color: var(--muted); }
.app-preview { display: grid; justify-items: center; gap: 12px; padding: 20px 18px 14px; border: 1px solid var(--line); border-radius: var(--radius); background: #e4edf0; }
.app-preview img { width: min(100%, 226px); border: 5px solid var(--fjord); border-radius: 25px; box-shadow: 0 13px 25px #193b4b28; }
.app-preview figcaption { color: var(--muted); font-size: 12px; text-align: center; }
.support { border-block: 1px solid var(--line); background: #e5eef0; }
.support-inner { display: grid; grid-template-columns: 1fr 1.18fr; gap: 28px; align-items: center; padding-block: clamp(32px, 5vw, 56px); }
.support h2 { font-size: clamp(30px, 4vw, 44px); }
.support-copy p { color: var(--muted); }
.support-links { display: flex; flex-wrap: wrap; gap: 0 24px; padding: 0; margin: 9px 0 0; list-style: none; }
.support-links a { display: inline-flex; align-items: center; gap: 7px; min-height: 44px; font-weight: 650; }
.support-links a:hover { color: var(--signal); }
.site-foot { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 6px 24px; padding-block: 22px; color: var(--muted); font-size: 13px; }
.site-foot a { display: inline-flex; align-items: center; min-height: 44px; overflow-wrap: anywhere; }
.policy { width: min(760px, calc(100% - 40px)); margin: 42px auto 70px; }
.policy h1 { font-size: clamp(32px, 5vw, 50px); margin-block: 18px 25px; }
.policy h2 { font-size: 22px; letter-spacing: -.02em; margin-block: 24px 8px; }
.policy p { margin-bottom: 10px; overflow-wrap: anywhere; }
.policy a { color: #1c546e; }

@media (max-width: 760px) {
  .wrap { width: calc(100% - 36px); }
  .head-inner { min-height: 67px; }
  .brand img { width: 38px; height: 38px; flex-basis: 38px; border-radius: 10px; }
  .hero, .terrain, .features, .support-inner { grid-template-columns: 1fr; }
  .hero { gap: 26px; padding-block: 37px 26px; }
  h1 { margin-block: 12px 15px; font-size: clamp(48px, 10.8vw, 68px); }
  .hero-intro { max-width: 34ch; }
  .button { margin-top: 18px; }
  .hero-image img { aspect-ratio: 1.6; }
  .terrain { gap: 18px; }
  .terrain-copy > p:last-child { max-width: 42ch; }
  .features { padding-block: 44px; }
  .app-preview { padding-top: 16px; }
  .support-inner { gap: 12px; }
}

@media (max-width: 350px) {
  .wrap { width: calc(100% - 28px); }
  .site-head nav a { font-size: 13px; padding-inline: 0; }
  .head-inner { gap: 8px; }
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
  .button, nav a { transition: background-color .18s, color .18s; }
}