:root {
  color-scheme: dark;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #edf1f0;
  background: #060809;
  -webkit-font-smoothing: antialiased;
  font-synthesis: none;
}
* { box-sizing: border-box; }
html { min-width: 280px; }
body { margin: 0; }
button, a { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
button { font: inherit; }
a { color: inherit; text-decoration: none; }
a:hover { color: #e8f9ef; }
button:focus-visible, a:focus-visible { outline: 2px solid #c1e9dc; outline-offset: 5px; }
::selection { background: #c1e9dc; color: #09140f; }
.ambient, #fluid-background { position: fixed; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.ambient {
  background: radial-gradient(ellipse at 30% 46%, #16333858, transparent 52%),
    radial-gradient(ellipse at 74% 56%, #28223d4a, transparent 48%), #060809;
}
.page { position: relative; display: grid; grid-template-rows: auto 1fr auto; min-height: 100svh; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 30px 5%; background: linear-gradient(#060809b3, transparent); }
.wordmark { display: inline-flex; align-items: center; gap: 11px; font-size: 15px; font-weight: 600; letter-spacing: .12em; }
.wordmark svg { width: 28px; height: 28px; fill: none; stroke: #bad2ca; stroke-width: 1.15; }
.wordmark-dot { color: #a4d4bd; }
.status { display: inline-flex; align-items: center; gap: 8px; color: #a3b0ae; font-size: 11px; letter-spacing: .1em; }
.status i { display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: #a5d7bd; box-shadow: 0 0 9px #a5d7bd66; }
.hero { position: relative; display: grid; place-items: center; padding: 76px 24px 116px; min-height: 400px; touch-action: none; user-select: none; }
.hero-content { width: 100%; text-align: center; }
.eyebrow, .tagline, .intro { text-shadow: 0 1px 5px #000, 0 2px 14px #000; }
.eyebrow { margin: 0 0 24px; color: #a4b0b2; font-size: 9px; font-weight: 500; letter-spacing: .31em; line-height: 1.8; }
h1 {
  margin: 0;
  padding-left: .07em;
  font-family: "Arial", "Microsoft YaHei", sans-serif;
  font-size: clamp(86px, 14vw, 200px);
  line-height: 1.04;
  letter-spacing: .07em;
  font-weight: 700;
  color: #f2f6f5;
  mix-blend-mode: difference;
  background: linear-gradient(115deg, #d5e0de, #fff 35%, #c8e3df 55%, #fff 75%, #d5e0de);
  background-size: 220% 100%;
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 18s ease-in-out infinite alternate;
}
.tagline { margin: 26px 0 0; color: #c2cccb; font-size: clamp(12px, 1.35vw, 18px); letter-spacing: .2em; line-height: 1.8; }
.intro { margin: 18px 0 0; color: #a9b8b5; font-size: 12px; letter-spacing: .25em; line-height: 2; }
.interaction-hint { position: absolute; bottom: 32px; margin: 0; padding: 6px 14px; max-width: calc(100% - 32px); color: #c0cdc8; background: #06080985; border-radius: 30px; font-size: 11px; letter-spacing: .12em; text-align: center; line-height: 1.8; text-shadow: 0 1px 10px #000; }
.footer { padding: 8px 5% max(25px, env(safe-area-inset-bottom)); background: linear-gradient(transparent, #060809c7 60%, #060809ed); }
.controls { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 12px; padding-bottom: 28px; }
.controls button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 42px; padding: 0 20px; color: #dce7e2; background: #06080999; border: 1px solid #ffffff38; border-radius: 100px; font-size: 12px; letter-spacing: .08em; cursor: pointer; backdrop-filter: blur(12px); transition: background .2s, border-color .2s, transform .2s; }
.controls button:hover:not(:disabled) { background: #ffffff12; border-color: #ffffff55; transform: translateY(-2px); }
.controls button:disabled { opacity: .45; cursor: default; }
.controls svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.pause-icon { width: 9px; height: 11px; border-left: 2px solid currentColor; border-right: 2px solid currentColor; }
[data-motion="paused"] .pause-icon { width: 0; height: 0; border: 6px solid transparent; border-right-width: 0; border-left: 9px solid currentColor; }
.footer-line { height: 1px; background: linear-gradient(90deg, transparent, #ffffff24, transparent); }
.footer-meta { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 20px; color: #96a39f; font-size: 10px; line-height: 1.8; letter-spacing: .03em; }
.credits { display: flex; flex-wrap: wrap; align-items: center; column-gap: 5px; }
.credits a { text-underline-offset: 3px; }
.credits a:hover { text-decoration: underline; }
.separator { color: #4d5b58; margin: 0 7px; }
body:not([data-motion="playing"]) h1 { animation-play-state: paused; }
body:not([data-motion="playing"]) .status i { background: #b6b8ab; box-shadow: none; }
[data-motion="reduced"] #fluid-background { visibility: hidden; }
@keyframes shimmer { from { background-position: 0% 50%; } to { background-position: 100% 50%; } }
@media (max-width: 600px) {
  .topbar { padding: 24px; }
  .wordmark { font-size: 13px; }
  .status { font-size: 10px; letter-spacing: .04em; }
  .hero { padding: 76px 20px 105px; min-height: 350px; }
  .eyebrow { font-size: 8px; letter-spacing: .17em; margin-bottom: 28px; }
  h1 { font-size: clamp(72px, 22vw, 130px); letter-spacing: .045em; padding-left: .045em; }
  .tagline { margin-top: 24px; font-size: 11px; letter-spacing: .12em; }
  .intro { margin-top: 18px; font-size: 11px; letter-spacing: .16em; }
  .interaction-hint { font-size: 10px; bottom: 32px; }
  .footer { padding: 8px 24px max(24px, env(safe-area-inset-bottom)); }
  .footer-meta { justify-content: center; text-align: center; gap: 8px; }
  .footer-meta > span { width: 100%; }
  .credits { justify-content: center; font-size: 9px; }
}
@media (max-height: 580px) and (min-width: 601px) {
  .topbar { padding-top: 18px; padding-bottom: 18px; }
  .hero { min-height: 280px; padding: 20px 24px 64px; }
  h1 { font-size: 100px; }
  .eyebrow { margin-bottom: 12px; }
  .tagline { margin-top: 12px; }
  .intro { margin-top: 8px; }
  .interaction-hint { bottom: 12px; }
  .controls { padding-bottom: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}