:root {
  color-scheme: light;
  --bg: #f5f5ef;
  --paper: #fff;
  --ink: #142a35;
  --copy: #415963;
  --muted: #536d78;
  --line: #cad5d2;
  --blue: #155f7b;
  font: 16px/1.55 system-ui, "Microsoft YaHei UI", "PingFang SC", sans-serif;
}
* { box-sizing: border-box }
body { margin: 0; background: var(--bg); color: var(--ink) }
h1,h2,h3,p,figure { margin: 0 }
h1,h2,h3 { font-weight: 600; line-height: 1.2 }
a { color: inherit; text-decoration: none }
a:hover { color: var(--blue) }
a:focus-visible,summary:focus-visible { outline: 2px solid var(--blue); outline-offset: 4px }
img { display: block; max-width: 100%; height: auto }
.wrap { width: min(1248px, calc(100% - 80px)); margin-inline: auto }
.skip { position: fixed; top: 8px; left: 8px; z-index: 2; padding: 12px; background: var(--paper); transform: translateY(-150%) }
.skip:focus { transform: none }
.site-header { border-bottom: 1px solid var(--line) }
.header-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px }
.brand { display: inline-flex; align-items: center; gap: 12px; white-space: nowrap; font-weight: 600 }
.brand img { border-radius: 9px }
nav { display: flex; align-items: center; gap: 28px; color: var(--copy); font-size: 14px }
.top-download { padding: 8px 16px; border: 1px solid var(--line); border-radius: 8px; color: var(--blue) }
.hero {
  margin-block: 32px 64px; min-height: 560px; padding: 56px 0 0 64px;
  display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  gap: 16px; align-items: stretch; isolation: isolate; overflow: hidden;
  border-radius: 6px 6px 40px 6px; background: #102b39; color: #f5f8f8;
}
.hero-copy { align-self: center; padding: 8px 0 48px; position: relative; z-index: 1 }
.byline { display: flex; align-items: center; gap: 14px; font-size: 14px; color: #e3eeeb; margin-bottom: 24px }
.byline span { border-left: 1px solid #75969c; padding-left: 14px; color: #c5ded8 }
h1 em { font-style: normal; color: #b8e9d4 }
.stage::before {
  content: ""; position: absolute; z-index: -2; width: min(88%, 544px);
  aspect-ratio: 1; border: 1px solid #557882; border-radius: 50%;
  box-shadow: 0 0 0 26px #ffffff08, 0 0 0 64px #ffffff07;
  transform: translate(6%, -2%);
}
h1 { font-size: clamp(56px, 6vw, 88px); letter-spacing: -.06em; line-height: 1.03 }
.summary { margin-top: 24px; color: #d4e1e4; line-height: 1.8 }
.button {
  display: inline-flex; align-items: center; gap: 8px; min-height: 52px;
  padding: 12px 20px; margin-top: 24px; border-radius: 8px;
  background: #eef6f7; color: #123341; font-weight: 600;
  transition: background-color 140ms ease-out;
}
.button:hover { background: #cde5ed; color: #123341 }
.hero a:focus-visible { outline-color: #a9dbe9 }
.meta { margin-top: 12px; font-size: 13px; color: #b6cdd4; font-variant-numeric: tabular-nums }
#release:not([hidden])::before { content: " · " }
.product { display: grid; grid-template-rows: 1fr auto; min-width: 0; position: relative }
.stage { position: relative; display: grid; place-items: center; isolation: isolate; min-height: 360px }
.band {
  position: absolute; width: 40%; height: 134%; right: 22%; top: -18%;
  transform: rotate(22deg); z-index: -1; border-inline: 2px solid #617582;
  background: linear-gradient(90deg,#253a45 0%,#536a75 48%,#374e59 100%);
  box-shadow: 12px 0 48px #0718207d; border-radius: 24px;
}
.device {
  width: min(78%, 488px); padding: clamp(12px, 1.4vw, 20px);
  position: relative; border-radius: clamp(24px, 3.6vw, 52px);
  transform: rotate(-9deg) translate(-3%, -4%);
  background: #101b23; border: 3px solid #93a9b3;
  box-shadow: 0 24px 48px #041118a3, inset 0 0 0 4px #324651, 0 0 0 2px #273b45;
}
.device::after {
  content: ""; position: absolute; top: 25%; right: -7px; width: 4px; height: 20%;
  border-radius: 4px; background: #778f9a;
}
.device img { width: 100%; border-radius: clamp(12px, 2.1vw, 32px) }
.product figcaption {
  position: relative; display: flex; justify-content: space-between; gap: 12px;
  margin: 0 32px 0 12px; padding: 12px 0 16px; border-top: 1px solid #728b95;
  font-size: 13px; color: #c0d2d8;
}
.product figcaption span:first-child { color: #f5f8f8; font-weight: 500 }
.library,.setup { padding-block: 48px 64px; border-top: 1px solid var(--line); scroll-margin-top: 16px }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 12px; margin-bottom: 24px }
h2 { font-size: clamp(28px, 3.6vw, 44px) }
.section-head p,.guide-intro p { color: var(--muted) }
.section-kicker { margin-bottom: 8px; font-size: 14px }
.games { display: grid; grid-template-columns: minmax(0,1.45fr) minmax(0,1fr) minmax(0,1fr); gap: 24px; align-items: end }
.games figure { min-width: 0 }
.games img { aspect-ratio: 3 / 2; object-fit: cover; width: 100%; border-radius: 6px }
.games .feature-game figcaption { font-size: clamp(20px, 2vw, 28px); line-height: 1.3 }
.games .feature-game small { display: block; font-size: 14px }
.games figcaption { padding-top: 12px; display: grid; gap: 4px; font-weight: 600 }
.games small { color: var(--muted); font-weight: 400 }
.setup { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 48px }
.guide-intro > p { margin-top: 16px; max-width: 29ch }
details { margin-top: 24px; max-width: 400px }
summary { color: var(--blue); cursor: pointer; width: fit-content; padding-block: 4px; font-weight: 500 }
 .compatibility table { width: 100%; margin: 12px 0; border-collapse: collapse; text-align: left; color: var(--copy); font-size: 14px }
.compatibility th,.compatibility td { padding: 9px 8px; border-bottom: 1px solid var(--line) }
.compatibility thead { background: #e4eee9; color: var(--ink) }
.compatibility tbody th { font-weight: 500 }
details p { font-size: 14px }
.steps { list-style: none; margin: 0; padding: 0 }
.steps li { display: flex; align-items: start; gap: 20px; padding-block: 16px; border-bottom: 1px solid var(--line) }
.steps li:first-child { padding-top: 4px }
.step-no { min-width: 24px; color: var(--blue); font-size: 14px; font-variant-numeric: tabular-nums }
.steps h3 { font-size: 18px; margin-bottom: 4px }
.steps p { color: var(--copy); font-size: 14px }
.footer { border-top: 1px solid var(--line); padding-block: 24px 40px; display: flex; justify-content: space-between; align-items: center; gap: 24px }
.footer p { color: var(--muted); font-size: 13px; padding-left: 44px; margin-top: 4px }
@media(max-width: 860px) {
  .wrap { width: min(680px, calc(100% - 40px)) }
 .hero { min-height: auto; grid-template-columns: 1fr; gap: 24px; padding: 32px 24px 0; margin-block: 20px 40px }
  .hero-copy { padding: 0 }
  .summary { margin-top: 16px }
  .stage { min-height: 0; aspect-ratio: 1.65 }
  .band { height: 136%; top: -6% }
  .device { width: min(72%, 400px); transform: rotate(-9deg) translate(-3%, 0) }
  .product figcaption { margin-inline: 0 }
  .setup { grid-template-columns: 1fr; gap: 32px }
  .section-head { align-items: start; flex-direction: column }
  .games { gap: 12px }
}
@media(max-width: 460px) {
  .wrap { width: calc(100% - 32px) }
  .header-row { min-height: 64px; gap: 12px }
  nav { gap: 12px }
  .site-header nav a:first-child { display: none }
  .site-header .brand { gap: 8px }
 .hero { padding-inline: 20px; border-radius: 16px }
  h1 { font-size: clamp(44px, 12vw, 56px) }
  .byline { margin-bottom: 16px }
  .library,.setup { padding-block: 32px 40px }
  .games { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px }
  .games .feature-game { grid-column: 1 / -1; grid-row: auto }
  .games .feature-game img { aspect-ratio: 3 / 2 }
  .footer { align-items: start; flex-direction: column; gap: 16px }
}
@media(prefers-reduced-motion: reduce) { .button { transition: none } }