:root {
  color-scheme: light;
  --paper: #faf9f6;
  --ink: #242520;
  --muted: #666861;
  --line: #dedfd7;
  --accent: #435642;
  font-family: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
body { margin: 0; font-size: 16px; line-height: 1.75; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 6px; }
img { display: block; }
h1, h2, h3, p { margin: 0; }
::selection { background: #dce4d6; }
.wrap { width: min(1040px, calc(100% - 80px)); margin-inline: auto; }
.skip-link { position: absolute; top: -100px; left: 20px; padding: 8px 16px; background: white; z-index: 10; }
.skip-link:focus { top: 12px; }
.header { display: flex; align-items: center; justify-content: space-between; height: 100px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 23px; font-weight: 600; letter-spacing: -.04em; }
.header nav { display: flex; align-items: center; gap: 32px; font-size: 14px; }
.nav-download { border: 1px solid var(--line); padding: 6px 18px; border-radius: 7px; }
.nav-download:hover { border-color: var(--accent); }
.hero { padding: 80px 0 110px; text-align: center; }
.app-icon { margin: 0 auto 32px; }
h1 { font-size: clamp(38px, 5.5vw, 64px); line-height: 1.3; font-weight: 600; letter-spacing: -.045em; text-wrap: balance; }
.intro { color: var(--muted); font-size: 18px; line-height: 1.9; margin-top: 25px; }
.actions { display: flex; align-items: center; justify-content: center; gap: 30px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 22px; padding: 12px 24px; background: var(--accent); color: #fff; border-radius: 8px; font-size: 15px; font-weight: 500; transition: background .15s; white-space: nowrap; }
.button:hover { color: white; background: #324531; }
.text-link { font-size: 15px; }
.text-link span { margin-left: 8px; }
.platforms { margin-top: 21px; font-size: 12px; color: var(--muted); }
.features { display: grid; grid-template-columns: 1fr 1.15fr; gap: 90px; padding: 70px 0; border-top: 1px solid var(--line); scroll-margin-top: 32px; }
h2 { font-weight: 500; font-size: 30px; line-height: 1.5; letter-spacing: -.03em; }
.section-intro p { max-width: 240px; color: var(--muted); margin-top: 20px; font-size: 15px; }
.feature-list article + article { margin-top: 29px; }
h3 { font-size: 17px; font-weight: 600; margin-bottom: 7px; }
.feature-list p { color: var(--muted); font-size: 15px; line-height: 1.85; }
.apps { border-top: 1px solid var(--line); padding: 46px 0 55px; }
.apps h2 { font-size: 17px; font-weight: 500; }
.apps ul { display: flex; flex-wrap: wrap; column-gap: 28px; row-gap: 13px; padding: 0; margin: 25px 0 0; list-style: none; color: var(--muted); font-size: 15px; }
.download { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 44px 48px; background: #efefe8; border-radius: 12px; scroll-margin-top: 32px; }
.download p { color: var(--muted); font-size: 14px; margin-top: 9px; }
.download .download-note { font-size: 12px; margin-top: 4px; }
footer { padding-top: 55px; padding-bottom: 30px; }
.footer-main { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-main .brand { font-size: 19px; }
.footer-links { display: flex; gap: 25px; font-size: 13px; color: var(--muted); }
.credits { color: var(--muted); font-size: 12px; margin-top: 24px; }
.credits a { text-decoration: underline; text-underline-offset: 3px; }
@media (max-width: 700px) {
  .wrap { width: calc(100% - 40px); }
  .header { height: 80px; }
  .header nav { gap: 20px; }
  .hero { padding: 50px 0 70px; }
  .app-icon { width: 72px; height: 72px; margin-bottom: 26px; }
  .intro { font-size: 16px; }
  .features { grid-template-columns: 1fr; gap: 34px; padding: 40px 0; }
  .section-intro h2 br { display: none; }
  .section-intro p { max-width: none; margin-top: 12px; }
  h2 { font-size: 26px; }
  .apps { padding: 34px 0; }
  .apps ul { column-gap: 22px; font-size: 14px; }
  .download { align-items: flex-start; flex-direction: column; padding: 28px; gap: 23px; }
  footer { padding-top: 36px; }
}
@media (max-width: 380px) {
  .header nav { gap: 14px; font-size: 13px; }
  .nav-download { padding-inline: 12px; }
  h1 { font-size: 34px; }
  .actions { gap: 20px; }
  .footer-links { gap: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
}