:root{
  color-scheme:dark;
  --ink:#080b12;
  --surface:#0f1620;
  --surface-2:#141c28;
  --paper:#f1f1ed;
  --muted:#a7acb4;
  --faint:#737b88;
  --line:rgba(229,233,239,.13);
  --line-strong:rgba(229,233,239,.24);
  --accent:#d47769;
  --accent-deep:#a94e43;
  --shell:min(1160px,calc(100% - 64px));
}

*{box-sizing:border-box}
html{background:var(--ink)}
body.download-page{
  margin:0;
  min-height:100dvh;
  overflow-x:hidden;
  color:var(--paper);
  background:
    radial-gradient(circle at 82% 8%,rgba(96,118,145,.14),transparent 30%),
    linear-gradient(180deg,#0b1018,var(--ink) 46%);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  -webkit-font-smoothing:antialiased;
}
body.download-page::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  opacity:.2;
  background-image:radial-gradient(circle,rgba(235,239,245,.34) 0 1px,transparent 1.4px);
  background-size:78px 78px;
  background-position:18px 24px;
}
a,button{-webkit-tap-highlight-color:transparent}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

.download-nav{
  width:var(--shell);
  height:72px;
  margin:0 auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  border-bottom:1px solid var(--line);
}
.download-nav nav{display:flex;align-items:center;gap:26px}
.download-nav nav a{color:var(--muted);font-size:13px;text-decoration:none}
.download-nav nav a:hover{color:var(--paper)}

main{width:var(--shell);margin:0 auto}
.download-hero{
  min-height:calc(100dvh - 72px);
  padding:68px 0 76px;
  display:grid;
  grid-template-columns:minmax(0,.92fr) minmax(360px,.78fr);
  gap:80px;
  align-items:center;
}
.download-copy{max-width:610px}
.download-kicker{margin:0 0 20px;color:var(--accent);font-size:12px;font-weight:750;letter-spacing:.16em}
.download-copy h1{margin:0;color:var(--paper);font-size:clamp(52px,6vw,78px);font-weight:760;line-height:1.08;letter-spacing:-.045em}
.download-lead{max-width:500px;margin:26px 0 0;color:var(--muted);font-size:17px;line-height:1.75}
.download-actions{margin-top:34px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.download-actions a{
  min-height:54px;
  padding:0 24px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:999px;
  font-size:14px;
  font-weight:750;
  text-decoration:none;
  white-space:nowrap;
  transition:transform .18s ease,background .18s ease,border-color .18s ease;
}
.download-actions a:active{transform:scale(.98)}
.download-primary{border:1px solid #c7675b;color:#fff7f5;background:var(--accent-deep)}
.download-primary:hover{background:#b9584d}
.download-secondary{border:1px solid var(--line-strong);color:var(--paper);background:rgba(15,22,32,.74)}
.download-secondary:hover{border-color:rgba(229,233,239,.4);background:var(--surface-2)}
.device-note{max-width:550px;margin:18px 0 0;padding:12px 14px;border-left:3px solid var(--accent);color:#c6cbd2;background:rgba(212,119,105,.07);font-size:12px;line-height:1.65}
.release-facts{margin:38px 0 0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.release-facts div{padding:17px 18px 18px 0}
.release-facts div+div{padding-left:18px;border-left:1px solid var(--line)}
.release-facts dt{color:var(--faint);font-size:10px;font-weight:700}
.release-facts dd{margin:7px 0 0;color:#dde0e2;font-size:13px;font-weight:700}

.download-product{position:relative;min-height:620px;display:grid;place-items:center}
.phone-frame{
  width:min(326px,82vw);
  margin:0;
  padding:8px;
  overflow:hidden;
  border:1px solid rgba(229,233,239,.22);
  border-radius:43px;
  background:#05080d;
  box-shadow:0 36px 90px rgba(0,0,0,.48),inset 0 1px 0 rgba(255,255,255,.11);
  transform:rotate(2.1deg);
}
.phone-frame img{width:100%;height:auto;display:block;border-radius:35px}
.app-icon-wrap{
  position:absolute;
  top:68px;
  right:0;
  z-index:2;
  width:104px;
  height:104px;
  padding:5px;
  border:1px solid rgba(229,233,239,.2);
  border-radius:27px;
  background:#111824;
  box-shadow:0 22px 50px rgba(0,0,0,.38);
  transform:translateX(6%) rotate(-5deg);
}
.app-icon-wrap img{width:100%;height:100%;display:block;border-radius:21px}

.install-section,.security-section,.platform-note{border-top:1px solid var(--line)}
.install-section{padding:94px 0 102px;display:grid;grid-template-columns:.72fr 1.28fr;gap:88px}
.install-copy h2,.security-section h2{margin:0;color:var(--paper);font-size:clamp(28px,3.2vw,42px);line-height:1.2;letter-spacing:-.03em}
.install-copy p,.security-section>div>p{max-width:470px;margin:15px 0 0;color:var(--muted);font-size:14px;line-height:1.75}
.install-list{margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}
.install-list li{min-height:92px;padding:21px 0;display:grid;grid-template-columns:.8fr 1.2fr;gap:30px;align-items:center;border-bottom:1px solid var(--line)}
.install-list strong{color:#e5e7e8;font-size:15px}
.install-list span{color:var(--faint);font-size:12px;line-height:1.65}

.security-section{padding:86px 0;display:grid;grid-template-columns:.75fr 1.25fr;gap:80px;align-items:center}
.checksum-box{min-width:0;padding:23px;border:1px solid var(--line);border-radius:16px;background:var(--surface)}
.checksum-box>span{display:block;color:var(--accent);font-size:10px;font-weight:760;letter-spacing:.12em}
.checksum-box code{display:block;margin:12px 0 18px;overflow-wrap:anywhere;color:#cfd3d8;font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace;font-size:11px;line-height:1.7}
.checksum-box button{min-height:42px;padding:0 16px;border:1px solid var(--line-strong);border-radius:999px;color:var(--paper);background:transparent;font:700 12px/1 inherit;cursor:pointer}
.checksum-box button:disabled{color:var(--faint);cursor:default}

.platform-note{margin-bottom:90px;padding:35px 0;display:flex;align-items:center;justify-content:space-between;gap:32px}
.platform-note strong{color:#e1e3e4;font-size:16px}
.platform-note p{max-width:700px;margin:8px 0 0;color:var(--faint);font-size:12px;line-height:1.7}
.platform-note a{flex:0 0 auto;min-height:44px;padding:0 18px;display:inline-flex;align-items:center;border:1px solid var(--line-strong);border-radius:999px;color:#efafa5;text-decoration:none;font-size:12px;font-weight:700}

.download-footer{width:var(--shell);margin:0 auto;padding:32px 0 max(36px,env(safe-area-inset-bottom));display:grid;grid-template-columns:1.1fr 1fr auto;gap:38px;border-top:1px solid var(--line)}
.download-footer>div strong{display:block;color:#dfe1e2;font-size:14px}
.download-footer>div span{display:block;margin-top:8px;color:var(--faint);font-size:10px}
.download-footer nav{display:flex;flex-wrap:wrap;gap:18px}
.download-footer a{color:var(--faint);font-size:10px;text-decoration:none}
.download-records{display:grid;gap:7px;justify-items:end}
.download-records a{white-space:nowrap}

@media(max-width:900px){
  :root{--shell:min(100% - 40px,1160px)}
  .download-hero{grid-template-columns:1fr;gap:34px;padding-top:56px}
  .download-copy{max-width:690px}
  .download-product{min-height:620px}
  .app-icon-wrap{right:calc(50% - 205px)}
  .install-section,.security-section{grid-template-columns:1fr;gap:38px}
  .download-footer{grid-template-columns:1fr;gap:18px}
  .download-records{justify-items:start}
}

@media(max-width:620px){
  :root{--shell:min(100% - 24px,1160px)}
  .download-nav{height:66px}
  .download-nav nav a:first-child{display:none}
  .download-nav nav{gap:14px}
  .download-hero{min-height:0;padding:54px 0 70px}
  .download-copy h1{font-size:44px}
  .download-lead{font-size:14px}
  .download-actions{align-items:stretch;flex-direction:column}
  .download-actions a{width:100%}
  .release-facts{grid-template-columns:1fr}
  .release-facts div,.release-facts div+div{padding:14px 0;border-left:0;border-top:1px solid var(--line)}
  .release-facts div:first-child{border-top:0}
  .download-product{min-height:580px}
  .phone-frame{width:min(310px,82vw);transform:rotate(1deg)}
  .app-icon-wrap{top:46px;right:3px;width:86px;height:86px;border-radius:23px}
  .app-icon-wrap img{border-radius:17px}
  .install-section,.security-section{padding:70px 0}
  .install-list li{grid-template-columns:1fr;gap:7px;min-height:82px}
  .platform-note{margin-bottom:54px;align-items:flex-start;flex-direction:column}
}

@media(prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition-duration:.01ms!important}
}