/* Offnomos 家族的共同设计语言；各站独立部署，共享源文件而不共享登录态。 */
:root {
  color-scheme: light;
  --paper: #f5f2eb;
  --ink: #171914;
  --muted: #696b60;
  --line: #d2d3c7;
  --lime: #d4fa48;
  --blue: #3556f5;
  --coral: #ff845f;
  --white: #fffef9;
  --bg: var(--paper);
  --text: var(--ink);
  --border: var(--line);
  --accent: var(--blue);
  --accent-soft: #e9edff;
  --radius: 18px;
  --radius-small: 9px;
  --font-body: "Helvetica Neue", "Arial", "PingFang SC", "Microsoft YaHei", sans-serif;
  --ease-out: cubic-bezier(.2, .8, .2, 1);
  --page-width: 1264px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font-body); -webkit-font-smoothing: antialiased; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a { color: inherit; }
button:disabled { cursor: not-allowed; }
img, svg { max-width: 100%; }
::selection { background: var(--lime); color: var(--ink); }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; }
[hidden] { display: none !important; }

.page-shell { width: min(var(--page-width), calc(100% - 80px)); margin-inline: auto; }
.eyebrow { margin: 0 0 22px; color: var(--muted); font-size: 11px; line-height: 1.5; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.brand-lockup { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-size: 23px; line-height: 1; font-weight: 750; letter-spacing: -.06em; }
.brand-mark { display: inline-grid; place-items: center; width: 31px; height: 31px; border: 2px solid currentColor; border-radius: 50%; font-size: 18px; letter-spacing: -.12em; padding-right: 2px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 24px; padding: 13px 21px; border: 1px solid var(--ink); border-radius: var(--radius-small); background: transparent; color: var(--ink); text-decoration: none; font-size: 14px; line-height: 1.4; font-weight: 650; transition: transform .25s var(--ease-out), background-color .2s ease, box-shadow .25s var(--ease-out); }
.button:hover { transform: translateY(-2px); box-shadow: 0 4px 0 rgba(23, 25, 20, .14); }
.button-dark { background: var(--ink); color: var(--white); }
.button-dark:hover { background: #32362b; }
.button-lime { background: var(--lime); }
.button-lime:hover { background: #c6ed37; }
.button-outline { background: transparent; }
.button-outline:hover { background: var(--white); }
.button:disabled { opacity: .55; transform: none; box-shadow: none; }
.skip-link { position: fixed; z-index: 100; left: 16px; top: 12px; transform: translateY(-150%); padding: 12px 20px; background: var(--ink); color: var(--white); border-radius: 8px; }
.skip-link:focus { transform: translateY(0); }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (max-width: 720px) {
  .page-shell { width: calc(100% - 36px); }
  .button { min-height: 46px; padding: 12px 17px; gap: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}