:root {
  color-scheme: light;
  --ink: #20201f;
  --muted: #686762;
  --paper: #f8f5ed;
  --paper-deep: #eee9dc;
  --line: rgba(32, 32, 31, 0.15);
  --lime: #b8e23e;
  --rose: #efb9c4;
  --aqua: #92d8d1;
  --gray: #c8c4c5;
  --white: #fffefa;
  --radius: 28px;
  --shadow: 0 24px 80px rgba(55, 47, 34, 0.12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(circle at 12% 18%, rgba(146, 216, 209, 0.23), transparent 27rem),
    radial-gradient(circle at 86% 42%, rgba(239, 185, 196, 0.22), transparent 30rem),
    var(--paper);
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 20;
  opacity: 0.17;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.86' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.17'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { display: block; max-width: 100%; }

.section-shell {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1240px, calc(100% - 24px));
  margin: 12px auto 0;
  padding: 11px 12px 11px 18px;
  border: 1px solid rgba(255,255,255,.7);
  border-radius: 999px;
  background: rgba(248,245,237,.79);
  box-shadow: 0 10px 32px rgba(50,45,35,.07);
  backdrop-filter: blur(18px);
}

.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 750; letter-spacing: -.04em; }
.brand-mark { display: grid; place-items: center; width: 31px; height: 31px; border-radius: 50%; color: var(--paper); background: var(--ink); font-family: Georgia, serif; font-style: italic; }
.topbar nav { display: flex; align-items: center; gap: 7px; }
.topbar nav a { padding: 10px 16px; color: #55544f; border-radius: 999px; font-size: 14px; transition: .2s ease; }
.topbar nav a:hover { background: rgba(32,32,31,.07); color: var(--ink); }
.topbar nav .nav-download { color: var(--paper); background: var(--ink); }
.topbar nav .nav-download:hover { color: #fff; background: #3a3937; }

.hero { min-height: 710px; display: grid; grid-template-columns: .88fr 1.12fr; align-items: center; gap: 42px; padding-block: 70px 80px; }
.eyebrow { display: flex; align-items: center; gap: 9px; margin: 0 0 24px; color: var(--muted); font-size: 12px; font-weight: 750; letter-spacing: .13em; text-transform: uppercase; }
.eyebrow span { width: 28px; height: 1px; background: currentColor; }
.hero h1 { max-width: 620px; margin: 0; font-size: clamp(58px, 7.2vw, 104px); line-height: .94; letter-spacing: -.075em; font-weight: 730; }
.hero h1 em { color: transparent; -webkit-text-stroke: 2px var(--ink); font-family: Georgia, "Times New Roman", serif; font-weight: 500; }
.hero-lead { max-width: 560px; margin: 30px 0 0; color: var(--muted); font-size: 17px; line-height: 1.9; }
.hero-actions { display: flex; gap: 12px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 23px; border: 1px solid var(--ink); border-radius: 999px; font-size: 14px; font-weight: 730; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { color: var(--paper); background: var(--ink); box-shadow: 0 12px 26px rgba(32,32,31,.16); }
.button.primary:hover { box-shadow: 0 16px 32px rgba(32,32,31,.22); }
.button.quiet { background: transparent; }
.button.quiet:hover { background: rgba(255,255,255,.55); }
.microcopy { margin: 21px 0 0; color: #89877f; font-size: 12px; }

.hero-stage { position: relative; min-height: 590px; isolation: isolate; }
.hero-stage::before { content: ""; position: absolute; inset: 8% 3% 2%; z-index: -3; border-radius: 48% 52% 49% 51%; background: rgba(255,254,250,.64); border: 1px solid rgba(32,32,31,.1); box-shadow: var(--shadow); transform: rotate(-4deg); }
.hero-stage::after { content: "YUNIVERSE"; position: absolute; right: 6%; top: 11%; z-index: -2; color: rgba(32,32,31,.055); font-family: Georgia, serif; font-size: clamp(64px, 7vw, 110px); letter-spacing: -.04em; writing-mode: vertical-rl; }
.orbit { position: absolute; z-index: -1; border: 1px solid rgba(32,32,31,.16); border-radius: 50%; }
.orbit-one { width: 70%; height: 48%; left: 15%; top: 27%; transform: rotate(17deg); }
.orbit-two { width: 55%; height: 70%; left: 21%; top: 14%; transform: rotate(-24deg); }
.orbit::after { content: ""; position: absolute; width: 9px; height: 9px; border-radius: 50%; background: var(--ink); top: 48%; left: -5px; }
.pet-portrait { position: absolute; display: grid; justify-items: center; filter: drop-shadow(0 20px 18px rgba(33,30,26,.15)); }
.pet-portrait img { width: clamp(145px, 15vw, 208px); height: auto; object-fit: contain; }
.pet-label { position: absolute; z-index: 2; white-space: nowrap; padding: 7px 11px; border: 1px solid var(--ink); border-radius: 99px; background: var(--white); font-size: 11px; font-weight: 700; box-shadow: 3px 3px 0 var(--ink); }
.pet-big { left: 1%; top: 12%; transform: rotate(-7deg); animation: float-a 5.3s ease-in-out infinite; }
.pet-big .pet-label { top: 4%; left: -2%; }
.pet-alien { right: 2%; top: 7%; transform: rotate(7deg); animation: float-b 4.8s ease-in-out infinite; }
.pet-alien .pet-label { top: 8%; right: -5%; }
.pet-bird { left: 31%; bottom: 2%; animation: float-c 5.8s ease-in-out infinite; }
.pet-bird img { width: clamp(185px, 19vw, 258px); }
.pet-bird .pet-label { top: 4%; right: -2%; }
.stage-note { position: absolute; left: 5%; bottom: 10%; padding-left: 13px; border-left: 2px solid var(--ink); color: var(--muted); font-size: 11px; line-height: 1.6; text-transform: uppercase; letter-spacing: .08em; }

@keyframes float-a { 0%,100% { transform: translateY(0) rotate(-7deg); } 50% { transform: translateY(-12px) rotate(-4deg); } }
@keyframes float-b { 0%,100% { transform: translateY(0) rotate(7deg); } 50% { transform: translateY(11px) rotate(4deg); } }
@keyframes float-c { 0%,100% { transform: translateY(0) rotate(0); } 50% { transform: translateY(-9px) rotate(2deg); } }

.ticker { overflow: hidden; border-block: 1px solid var(--line); background: rgba(255,254,250,.48); }
.ticker > div { display: flex; align-items: center; width: max-content; padding: 15px 0; animation: ticker 25s linear infinite; }
.ticker span { padding: 0 25px; font-size: 12px; font-weight: 700; letter-spacing: .12em; }
.ticker i { color: #8cbdb8; font-style: normal; }
@keyframes ticker { to { transform: translateX(-50%); } }

.members, .features, .notes { padding-block: 130px; }
.section-heading { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 30px; margin-bottom: 54px; }
.section-heading .eyebrow { grid-column: 1/-1; margin-bottom: 0; }
.section-heading h2 { margin: 0; font-size: clamp(42px, 5.6vw, 76px); line-height: 1.05; letter-spacing: -.065em; }
.section-heading > p:last-child { justify-self: end; max-width: 430px; margin: 0; color: var(--muted); line-height: 1.8; }
.member-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.member-card { position: relative; overflow: hidden; min-height: 520px; padding: 24px; border: 1px solid rgba(32,32,31,.13); border-radius: var(--radius); display: flex; flex-direction: column; }
.member-card.gray { background: #d4d1d1; }
.member-card.lime { background: #c6e968; }
.member-card.rose { background: #efc6ce; }
.member-number { align-self: flex-end; display: grid; place-items: center; width: 44px; height: 44px; border: 1px solid rgba(32,32,31,.45); border-radius: 50%; font-family: Georgia, serif; font-style: italic; }
.member-image { flex: 1; min-height: 260px; display: grid; place-items: center; }
.member-image img { width: min(240px, 84%); max-height: 285px; object-fit: contain; filter: drop-shadow(0 18px 15px rgba(32,32,31,.14)); transition: transform .35s cubic-bezier(.2,.8,.2,1); }
.member-card:hover .member-image img { transform: translateY(-8px) scale(1.035); }
.member-card:nth-child(3) .member-image img { width: min(265px, 92%); }
.member-copy { padding-top: 20px; border-top: 1px solid rgba(32,32,31,.26); }
.member-copy h3 { margin: 0 0 9px; font-size: 24px; letter-spacing: -.04em; }
.member-copy p { margin: 0; color: rgba(32,32,31,.7); font-size: 13px; line-height: 1.8; }

.features { display: grid; grid-template-columns: .82fr 1.18fr; gap: 90px; }
.features .section-heading { display: block; margin: 0; position: sticky; top: 110px; align-self: start; }
.features .section-heading .eyebrow { margin-bottom: 24px; }
.feature-list { border-top: 1px solid var(--line); }
.feature { display: grid; grid-template-columns: 72px 1fr; gap: 26px; padding: 34px 0; border-bottom: 1px solid var(--line); }
.feature-icon { display: grid; place-items: center; width: 58px; height: 58px; border-radius: 18px; border: 1px solid var(--line); background: rgba(255,255,255,.5); font-family: Georgia, serif; font-size: 21px; }
.feature h3 { margin: 2px 0 8px; font-size: 23px; letter-spacing: -.035em; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }

.download-section { padding-block: 70px 130px; }
.download-card { display: grid; grid-template-columns: 1fr .9fr; gap: 70px; padding: clamp(32px,5vw,72px); border-radius: 36px; color: var(--paper); background: #242422; box-shadow: 0 28px 80px rgba(32,32,31,.2); }
.eyebrow.light { color: #aaa9a2; }
.download-copy h2 { margin: 0; font-size: clamp(48px, 6vw, 82px); line-height: 1; letter-spacing: -.065em; }
.download-intro { max-width: 570px; margin: 28px 0; color: #bbb9b1; font-size: 14px; line-height: 1.9; }
.download-intro strong { color: #e9e5dc; font-weight: 650; }
.compatibility { display: flex; flex-wrap: wrap; gap: 8px; }
.compatibility span { padding: 8px 12px; border: 1px solid #53524e; border-radius: 99px; color: #c9c7bf; font-size: 11px; }
.download-panel { align-self: center; padding: 22px; border: 1px solid #4b4a46; border-radius: 26px; background: #2d2d2a; }
.version-row { display: flex; justify-content: space-between; padding: 3px 4px 17px; color: #a8a69f; font-size: 12px; }
.version-row strong { color: #eeece5; }
.download-button { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 15px; padding: 18px 18px 18px 20px; border: 0; border-radius: 18px; color: var(--ink); background: var(--lime); cursor: pointer; text-align: left; transition: transform .2s ease, filter .2s ease; }
.download-button:hover { transform: translateY(-2px); filter: brightness(1.03); }
.download-button:disabled { cursor: wait; filter: saturate(.35); transform: none; }
.download-button-copy { display: grid; gap: 4px; }
.download-button-copy strong { font-size: 17px; }
.download-button-copy small { font-size: 10px; opacity: .7; }
.download-arrow { display: grid; place-items: center; flex: 0 0 auto; width: 42px; height: 42px; border: 1px solid rgba(32,32,31,.42); border-radius: 50%; font-size: 23px; }
.download-progress { margin-top: 20px; }
.progress-meta { display: flex; justify-content: space-between; margin-bottom: 9px; color: #bbb9b1; font-size: 11px; }
.progress-track { height: 7px; overflow: hidden; border-radius: 99px; background: #494844; }
.progress-track span { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--lime); transition: width .2s ease; }
.download-status { min-height: 36px; margin: 14px 4px 16px; color: #9f9d96; font-size: 11px; line-height: 1.6; }
.hash-box { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 9px; padding: 11px; border-radius: 12px; background: #242422; }
.hash-box > span { color: #85837d; font-size: 9px; }
.hash-box code { overflow: hidden; color: #c5c3bc; font-size: 9px; text-overflow: ellipsis; white-space: nowrap; }
.hash-box button { border: 0; padding: 5px 7px; border-radius: 7px; color: #d8d5cd; background: #464540; cursor: pointer; font-size: 10px; }
.safety-note { margin: 12px 4px 2px; color: #77766f; font-size: 10px; line-height: 1.6; }
.safety-note a { color: inherit; font-weight: 700; text-underline-offset: 2px; }

.notes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 34px; border-top: 1px solid var(--line); }
.note-block > span { display: inline-block; margin-bottom: 30px; color: #99968d; font-family: Georgia, serif; font-style: italic; }
.note-block h3 { margin: 0 0 14px; font-size: 20px; letter-spacing: -.03em; }
.note-block p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; }

footer { display: grid; grid-template-columns: 1fr 2fr auto; align-items: center; gap: 34px; padding: 34px max(28px, calc((100vw - 1180px)/2)); border-top: 1px solid var(--line); color: var(--muted); font-size: 10px; line-height: 1.7; }
.footer-brand { color: var(--ink); font-size: 15px; }
.footer-brand .brand-mark { width: 27px; height: 27px; font-size: 13px; }
footer p { margin: 0; text-align: center; }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 70px; }
  .hero-stage { min-height: 560px; }
  .member-grid { grid-template-columns: 1fr; }
  .member-card { min-height: 420px; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .member-number { position: absolute; top: 22px; right: 22px; }
  .member-image { min-height: 310px; }
  .member-copy { align-self: end; }
  .features { grid-template-columns: 1fr; gap: 50px; }
  .features .section-heading { position: static; }
  .download-card { grid-template-columns: 1fr; }
  footer { grid-template-columns: 1fr; text-align: center; }
  footer .brand { justify-self: center; }
}

@media (max-width: 620px) {
  .section-shell { width: min(100% - 24px, 1180px); }
  .topbar nav a:not(.nav-download) { display: none; }
  .hero { min-height: auto; padding-block: 62px; }
  .hero h1 { font-size: clamp(52px, 17vw, 76px); }
  .hero-lead { font-size: 14px; }
  .hero-actions { flex-direction: column; }
  .hero-stage { min-height: 430px; }
  .pet-portrait img { width: 130px; }
  .pet-bird img { width: 180px; }
  .pet-big { left: -2%; }
  .pet-alien { right: -4%; }
  .pet-bird { left: 26%; }
  .stage-note { display: none; }
  .members, .features, .notes { padding-block: 88px; }
  .section-heading { grid-template-columns: 1fr; }
  .section-heading .eyebrow { grid-column: 1; }
  .section-heading > p:last-child { justify-self: start; }
  .member-card { display: flex; min-height: 470px; }
  .member-image { min-height: 260px; }
  .feature { grid-template-columns: 56px 1fr; gap: 16px; }
  .feature-icon { width: 50px; height: 50px; }
  .download-section { padding-bottom: 90px; }
  .download-card { gap: 44px; padding: 30px 18px; border-radius: 26px; }
  .download-copy { padding-inline: 10px; }
  .download-panel { padding: 14px; }
  .hash-box { grid-template-columns: auto 1fr; }
  .hash-box button { grid-column: 1/-1; }
  .notes { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}