:root {
  color-scheme: dark;
  font-family: system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: #0b0b0c;
  --ink: #f5f4ef;
  --muted: #b0b0aa;
  --line: #2c2d2b;
  --surface: #181918;
  --raised: #242523;
  --gold: #efbc4d;
}

*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }
button:focus-visible, a:focus-visible { outline: 3px solid var(--gold); outline-offset: 5px; }
.shell { width: min(1160px, calc(100% - 96px)); margin-inline: auto; }
.skip { position: absolute; top: 8px; left: 8px; transform: translateY(-150%); background: var(--surface); padding: 12px; z-index: 5; }
.skip:focus { transform: none; }
.header { border-bottom: 1px solid var(--line); }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand img { border-radius: 11px; display: block; }
.wordmark { font-size: 21px; line-height: 1.15; font-weight: 780; }
.wordmark small { display: block; margin-top: 4px; font-size: 8px; font-weight: 750; letter-spacing: .15em; color: var(--muted); }
.header-download { color: var(--ink); background: none; border: 1px solid #494943; border-radius: 999px; padding: 9px 17px; font-size: 13px; font-weight: 690; }
.header-download span { margin-left: 4px; }
.header-download:hover { background: var(--raised); }

.hero { display: grid; grid-template-columns: 1fr .96fr; gap: clamp(30px, 5vw, 82px); align-items: center; min-height: min(690px, 82vh); padding-block: 44px; }
.intro { padding-bottom: 12px; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 25px; padding: 7px 12px; border: 1px solid #3c3829; border-radius: 999px; color: #e6d5aa; background: #201e17; font-size: 12px; font-weight: 690; letter-spacing: .08em; }
.eyebrow > span { width: 7px; height: 7px; border-radius: 50%; background: var(--gold); }
h1 { margin: 0; color: var(--ink); font-size: clamp(56px, 6.5vw, 99px); line-height: 1.11; letter-spacing: -.035em; font-weight: 880; }
.gold-dot { display: inline-block; width: .17em; height: .17em; margin-left: .22em; border-radius: 50%; background: var(--gold); vertical-align: .04em; }
.description { color: var(--muted); font-size: clamp(16px, 1.5vw, 19px); line-height: 1.8; margin: 25px 0 28px; }
.mobile-break { display: none; }
.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; }
.primary { min-height: 51px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; border: 0; border-radius: 12px; background: var(--gold); color: #20180a; font-size: 14px; font-weight: 730; padding: 0 18px; box-shadow: 0 5px 20px #efbc4d1c; transition: background .18s, transform .18s; }
.primary:hover { background: #ffd575; transform: translateY(-1px); }
.version { color: var(--muted); font-size: 12px; display: flex; align-items: center; gap: 8px; margin: 19px 0 0; }
.version-dot { width: 6px; height: 6px; background: var(--gold); border-radius: 50%; }

.showcase { display: grid; place-items: center; position: relative; isolation: isolate; margin: 0; height: clamp(490px, 48vw, 590px); overflow: hidden; border: 1px solid var(--line); border-radius: 32px; background: radial-gradient(ellipse at 49% 42%, #272b23 2%, #181b17 52%, #121313 100%); }
.showcase-head, figcaption { position: absolute; z-index: 2; left: 24px; right: 24px; display: flex; justify-content: space-between; align-items: center; gap: 14px; }
.showcase-head { top: 22px; font-size: 10px; letter-spacing: .16em; font-weight: 750; color: var(--muted); }
.signal { width: 8px; height: 8px; background: #76b793; border-radius: 50%; box-shadow: 0 0 0 4px #76b79322; }
.orbit { position: absolute; pointer-events: none; z-index: -1; width: 85%; aspect-ratio: 1; border: 1px solid #a7b29738; border-radius: 50%; }
.orbit-inner { width: 66%; }
.accent { position: absolute; z-index: -1; border-radius: 50%; }
.accent-gold { height: 14px; width: 14px; background: #e9b44b; top: 25%; right: 14%; box-shadow: 0 0 0 6px #edb64426; }
.accent-jade { height: 9px; width: 9px; background: #89aa92; bottom: 27%; left: 14%; }
.phone { position: relative; width: clamp(188px, 18.2vw, 230px); padding: 7px; border-radius: 35px; background: linear-gradient(120deg, #535750, #191b18 30%, #111310 70%, #5b5e57); border: 1px solid #62665d; box-shadow: 0 22px 37px #0008, 0 5px 9px #0006; }
.phone-glass { position: relative; border-radius: 27px; overflow: hidden; background: #0d4d3c; aspect-ratio: 9 / 20; }
video { display: block; width: 100%; height: 100%; object-fit: cover; }
.camera { position: absolute; pointer-events: none; left: 50%; top: 8px; transform: translateX(-50%); width: 39px; height: 12px; background: #0a241d; border-radius: 999px; }
.home-indicator { position: absolute; pointer-events: none; left: 50%; bottom: 7px; transform: translateX(-50%); width: 58px; height: 3px; background: #e9f0ddbb; border-radius: 999px; }
figcaption { bottom: 20px; color: var(--ink); font-weight: 670; font-size: 12px; }
.film-duration { color: var(--muted); font-size: 11px; font-weight: 540; }
.footer { min-height: 68px; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: 12px; gap: 12px; }
.footer button { border: 0; padding: 7px 0 7px 10px; background: none; color: inherit; font-size: inherit; }
.footer button:hover { color: var(--gold); text-decoration: underline; }

dialog { width: min(440px, calc(100vw - 36px)); border: 1px solid var(--line); border-radius: 24px; padding: 26px; background: var(--surface); color: var(--ink); box-shadow: 0 20px 80px #0009; }
dialog::backdrop { background: #000a; }
.dialog-close { position: absolute; right: 17px; top: 15px; }
.dialog-close button { border: 0; border-radius: 50%; background: var(--raised); width: 32px; height: 32px; color: var(--ink); font-size: 22px; line-height: 1; }
.dialog-logo { border-radius: 13px; }
dialog h2 { margin: 15px 0 10px; font-size: 23px; }
dialog p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.release-info { padding: 12px 16px; background: var(--raised); border-radius: 12px; margin: 18px 0; }
.release-info div { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; padding-block: 5px; font-size: 13px; }
.release-info dt { color: var(--muted); }
.release-info dd { margin: 0; font-weight: 700; text-align: right; }
.dialog-done { width: 100%; }

@media (max-width: 920px) {
  .shell { width: calc(100% - 56px); }
  .hero { gap: 28px; }
  h1 { font-size: clamp(56px, 8.4vw, 78px); }
  .showcase { height: 495px; }
}
@media (max-width: 700px) {
  .shell { width: calc(100% - 36px); }
  .header-inner { min-height: 65px; }
  .brand img { width: 34px; height: 34px; }
  .wordmark { font-size: 18px; }
  .hero { grid-template-columns: minmax(0, 1fr); gap: 28px; padding-block: 36px 24px; min-height: 0; }
  .intro { padding: 0; }
  .eyebrow { margin-bottom: 17px; }
  h1 { font-size: clamp(54px, 13vw, 79px); }
  .description { margin: 15px 0 20px; }
  .actions { gap: 14px; }
  .version { margin-top: 14px; }
  .showcase { height: 430px; border-radius: 23px; }
  .showcase-head, figcaption { left: 16px; right: 16px; }
  .showcase-head { top: 15px; }
  figcaption { bottom: 14px; }
  .phone { width: 153px; border-radius: 29px; padding: 6px; }
  .phone-glass { border-radius: 22px; }
  .camera { width: 30px; height: 9px; top: 6px; }
  .footer { min-height: 55px; }
}
@media (max-width: 370px) {
  .mobile-break { display: initial; }
  .actions { align-items: start; flex-direction: column; gap: 9px; }
}
@media (prefers-reduced-motion: reduce) {
  .primary { transition: none; }
  .primary:hover { transform: none; }
}