@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/fonts/noto-sans-sc-400.woff2") format("woff2");
}
@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("/fonts/noto-sans-sc-700.woff2") format("woff2");
}
:root {
  color-scheme: dark;
  --paper: #080c12;
  --ink: #e1eaf1;
  --teal: #68cbd6;
  --sky: #8de0d7;
  --line: #243140;
  --muted: #96a8b9;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--paper);
  color: var(--ink);
  font-synthesis: none;
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid var(--teal); outline-offset: 6px; }
.page { width: min(1440px, calc(100% - 96px)); margin: auto; }
.masthead { display: flex; justify-content: space-between; align-items: center; padding: 32px 0; }
.brand { display: inline-flex; gap: 12px; align-items: center; font-size: 21px; font-weight: 600; letter-spacing: -.6px; }
.brand img { border-radius: 11px; }
.accent { color: var(--teal); }
.site-kind { color: var(--muted); font-size: 12px; letter-spacing: 2px; }
.hero { display: grid; max-width:1080px; margin-inline:auto; grid-template-columns: minmax(0,.88fr) minmax(0,1fr); align-items: center; gap: 24px; padding: 18px 0 46px; min-height:620px; }
.introduction { position:relative; z-index:1; }
.eyebrow { font-size: 13px; letter-spacing: 2px; color: var(--teal); margin: 0 0 25px; }
h1 { font-family: "Noto Serif SC", "Songti SC", "STSong", "SimSun", "Noto Sans SC", serif; font-size: clamp(34px, 3.3vw, 52px); font-weight: 600; line-height: 1.6; letter-spacing: -.03em; margin: 0; }
.discovery { color: var(--teal); white-space: nowrap; }
.description { color: var(--muted); font-size: 15px; line-height: 2; margin: 23px 0 30px; }
.enter { display: inline-flex; align-items: center; justify-content: space-between; gap: 42px; min-height: 54px; padding: 0 23px; background: var(--teal); color: var(--paper); border:1px solid transparent; border-radius: 9px; font-size: 15px; transition: background .18s; }
.enter:hover { background: var(--sky); }
.enter span { font-size: 23px; line-height: 1; }
.entry-note { color: var(--muted); font-size: 12px; margin: 14px 0 0; }
.entry-note a { text-decoration: underline; text-underline-offset: 4px; }
.pending { min-height: 65vh; padding: 72px 0; max-width: 760px; }
.pending h1 { font-size: clamp(28px, 5vw, 42px); }
.field { min-width:0; position:relative; aspect-ratio:1; width:min(100%,560px); justify-self:center; pointer-events:none; }
#sphere-field { position:absolute; inset:0; isolation:isolate; user-select:none; }
#sphere-field .ranking-visual-canvas { display:block; width:100%; height:100%; }
#sphere-field :is(.ranking-visual-targets,.ranking-visual-empty,.ranking-algorithm-caption,.ranking-algorithm-formula) { display:none; }
.field:has(.sphere-status:not(.sr-only)) { margin-bottom:20px; }
.sphere-status:not(.sr-only) { position:absolute; z-index:2; bottom:-20px; left:50%; transform:translateX(-50%); width:max-content; max-width:100%; margin:0; padding:7px 12px; border:1px solid var(--line); border-radius:8px; background:var(--paper); color:var(--muted); font-size:12px; line-height:1.6; text-align:center; }
.sphere-status[data-tone="warning"]:not(.sr-only) { color:#f2ca84; border-color:#6d5630; }
.capabilities { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; border-top: 1px solid var(--line); padding: 34px 0; }
.capabilities h2 { font-size: 15px; font-weight: 500; margin: 0 0 11px; }
.capabilities p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; max-width: 230px; }
.about { display: flex; align-items: baseline; gap: 28px; padding: 22px 0 32px; color: var(--muted); font-size: 12px; line-height: 1.9; }
.about > span { white-space: nowrap; color: var(--ink); }
.about p { margin: 0; }
.footer { padding: 32px 20px; background: #232426; color: #aeb4bc; font-size: 12px; line-height: 1.8; text-align: center; }
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.footer p { margin: 0; }
.footer-copyright { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 0 20px; }
.footer-copyright > span { white-space: nowrap; }
.footer a { display: inline-flex; align-items: center; gap: 7px; min-height: 28px; }
.footer img { flex: none; }
.footer-note { color: #d3d7dd; padding-top: 4px; }
.footer a:hover { color: white; text-decoration: underline; text-underline-offset: 4px; }
.footer a:focus-visible { outline-color: var(--sky); outline-offset: 3px; }
.footer ::selection { background: var(--sky); color: var(--ink); }
.skip-link { position: absolute; top: -80px; left: 16px; padding: 12px; background: var(--paper); z-index: 2; }
.skip-link:focus { top: 8px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
@media (max-width: 950px) {
  .page { width: calc(100% - 64px); }
  .hero { grid-template-columns:minmax(0,1fr) minmax(0,1fr); gap: 24px; padding: 30px 0 44px; min-height:500px; }
  h1 { font-size: 36px; }
  .desktop-break { display: none; }
  .capabilities { gap: 24px; }
}
@media (max-width: 680px) {
  .page { width: calc(100% - 40px); }
  .masthead { padding: 24px 0; }
  .brand { font-size: 19px; gap: 9px; }
  .brand img { width: 32px; height: 32px; }
  .site-kind { display: none; }
  .hero { grid-template-columns: 1fr; padding: 24px 0; gap: 24px; min-height:0; }
  .eyebrow { font-size: 12px; letter-spacing: 1px; margin-bottom: 21px; }
  h1 { font-size: clamp(30px, 8vw, 46px); line-height: 1.6; }
  .description { font-size: 14px; margin: 21px 0 26px; }
  .field { width:88%; max-width:320px; }
  .capabilities { grid-template-columns: 1fr 1fr; gap: 26px 22px; padding: 28px 0; }
  .capabilities p { font-size: 12px; }
  .about { display: block; padding: 8px 0 25px; }
  .about > span { display: block; margin-bottom: 8px; }
  .footer { padding: 28px 20px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }