/* Shared shell for secondary pages (download / about / contact).
   index.html keeps its own inline styles; this file mirrors that look. */
:root {
  --bg:#08090d; --bg-soft:#0e0f15; --panel:#14151d; --panel-2:#1a1c26; --line:#282a37;
  --gold:#e3c072; --gold-soft:#c9a35a; --gold-dim:#8a7440;
  --sapphire:#6ea0e0; --sapphire-dim:#3f6ba8; --rare:#f2e27a;
  --text:#ece9e1; --muted:#9a978f; --muted-2:#6b6860; --maxw:1180px;
}
* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { margin:0; background:var(--bg); color:var(--text);
  font-family:"Inter","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased; line-height:1.6; overflow-x:hidden; }
a { color:inherit; text-decoration:none; }
.wrap { max-width:var(--maxw); margin:0 auto; padding:0 24px; }

/* ambient */
.bg-fx { position:fixed; inset:0; z-index:0; pointer-events:none; overflow:hidden; }
.aurora { position:absolute; border-radius:50%; filter:blur(100px); }
.aurora.a1 { width:680px; height:680px; top:-240px; left:-180px; background:radial-gradient(circle,rgba(227,192,114,.18),transparent 62%); animation:drift1 18s ease-in-out infinite; }
.aurora.a2 { width:620px; height:620px; top:220px; right:-220px; background:radial-gradient(circle,rgba(110,160,224,.14),transparent 62%); animation:drift2 22s ease-in-out infinite; }
@keyframes drift1 { 0%,100%{transform:translate(0,0) scale(1);} 50%{transform:translate(40px,30px) scale(1.08);} }
@keyframes drift2 { 0%,100%{transform:translate(0,0) scale(1);} 50%{transform:translate(-50px,20px) scale(1.1);} }
.grid-lines { position:absolute; inset:0; height:100vh; opacity:.28;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:48px 48px; mask-image:radial-gradient(ellipse 75% 55% at 50% 0%,#000 30%,transparent 72%); }
.embers { position:absolute; inset:0; }
.ember { position:absolute; bottom:-10px; border-radius:50%; background:var(--gold); box-shadow:0 0 6px var(--gold); opacity:0; animation:rise linear infinite; }
@keyframes rise { 0%{transform:translateY(0) translateX(0); opacity:0;} 10%{opacity:.8;} 90%{opacity:.5;} 100%{transform:translateY(-100vh) translateX(var(--drift,20px)); opacity:0;} }

/* nav */
nav { position:sticky; top:0; z-index:50; backdrop-filter:blur(12px); background:rgba(8,9,13,.72); border-bottom:1px solid var(--line); }
.nav-inner { display:flex; align-items:center; gap:16px; height:62px; }
.brand { display:flex; align-items:center; gap:11px; font-weight:700; }
.brand img { width:30px; height:30px; border-radius:8px; box-shadow:0 0 14px rgba(227,192,114,.3); }
.brand .cn { font-size:17px; }
.brand .en { font-size:11px; color:var(--muted); letter-spacing:1.6px; text-transform:uppercase; display:block; }
.nav-links { margin-left:auto; display:flex; align-items:center; gap:6px; }
.nav-links a.link { padding:8px 12px; color:var(--muted); font-size:14px; font-weight:500; border-radius:8px; transition:.15s; }
.nav-links a.link:hover { color:var(--text); background:var(--panel); }
.lang-toggle { display:inline-flex; border:1px solid var(--line); border-radius:999px; padding:3px; background:var(--panel); font-size:12px; font-weight:600; }
.lang-toggle button { border:0; background:transparent; color:var(--muted); padding:4px 12px; border-radius:999px; cursor:pointer; font:inherit; transition:.15s; }
.lang-toggle button.active { background:var(--gold); color:#1a1400; }

/* buttons */
.btn { display:inline-flex; align-items:center; justify-content:center; gap:8px; cursor:pointer; font-weight:600; font-size:14px;
  border-radius:11px; padding:11px 20px; border:1px solid transparent; transition:.18s; white-space:nowrap; }
.btn svg { width:16px; height:16px; }
.btn-gold { background:linear-gradient(180deg,#eccb78,#c99f45); color:#211900; box-shadow:0 8px 26px -10px rgba(227,192,114,.7); }
.btn-gold:hover { transform:translateY(-2px); box-shadow:0 14px 34px -10px rgba(227,192,114,.85); }
.btn-ghost { background:var(--panel); border-color:var(--line); color:var(--text); }
.btn-ghost:hover { border-color:var(--gold-dim); color:var(--gold); }

/* shared bits */
.reveal { opacity:0; transform:translateY(24px); transition:opacity .7s ease,transform .7s ease; }
.reveal.in { opacity:1; transform:none; }
.badge { display:inline-flex; align-items:center; gap:8px; font-size:12.5px; font-weight:600; color:var(--gold);
  border:1px solid rgba(227,192,114,.3); background:rgba(227,192,114,.07); padding:6px 14px; border-radius:999px; margin-bottom:22px; }
.badge .dot { width:7px; height:7px; border-radius:50%; background:var(--gold); box-shadow:0 0 10px var(--gold); animation:pulse 2s ease-in-out infinite; }
@keyframes pulse { 0%,100%{opacity:1;} 50%{opacity:.35;} }
.shine { background:linear-gradient(90deg,var(--gold) 0%,#fff6db 45%,var(--gold) 60%); background-size:250% 100%;
  -webkit-background-clip:text; background-clip:text; color:transparent; animation:shine 5.5s linear infinite; }
@keyframes shine { 0%{background-position:120% 0;} 100%{background-position:-120% 0;} }

/* footer */
footer { position:relative; z-index:1; border-top:1px solid var(--line); padding:40px 0; margin-top:56px; }
.foot-inner { display:flex; flex-wrap:wrap; align-items:center; gap:16px; justify-content:space-between; color:var(--muted-2); font-size:13.5px; }
.foot-inner .brand .cn { font-size:15px; }
.foot-nav { display:flex; flex-wrap:wrap; gap:6px 4px; margin-top:18px; }
.foot-nav a { color:var(--muted); font-size:13.5px; padding:4px 10px; border-radius:7px; transition:.15s; }
.foot-nav a:hover { color:var(--gold); background:var(--panel); }
.foot-nav .dot-sep { color:var(--line); align-self:center; }
.foot-contact { display:flex; align-items:center; flex-wrap:wrap; gap:8px; margin-top:18px; font-size:14px; color:var(--muted); }
.foot-contact svg { width:16px; height:16px; color:var(--gold-soft); flex:none; }
.foot-contact a { color:var(--gold); font-weight:600; }
.foot-contact a:hover { text-decoration:underline; }
.foot-social { display:flex; gap:10px; margin-top:18px; flex-wrap:wrap; }
.social-btn { display:inline-flex; align-items:center; gap:8px; font-size:13.5px; font-weight:600; color:var(--text);
  border:1px solid var(--line); background:var(--panel); padding:9px 15px; border-radius:10px; transition:.18s; cursor:pointer; }
.social-btn svg { width:18px; height:18px; }
.social-btn.discord svg { color:#8b93f5; }
.social-btn.discord:hover { border-color:#5865F2; color:#aab0f7; box-shadow:0 8px 20px -8px rgba(88,101,242,.6); }
.social-btn.qq svg { color:#3db8f5; }
.social-btn.qq:hover { border-color:#1EBAFC; color:#7dd3fb; box-shadow:0 8px 20px -8px rgba(30,186,252,.6); }
.qq-copied { display:none; }
.social-btn.qq.copied .qq-label { display:none; }
.social-btn.qq.copied .qq-copied { display:inline; color:#7dd3fb; }
.beian { color:var(--muted-2); } .beian:hover { text-decoration:underline; color:var(--muted); }

/* generic secondary-page hero + prose */
.page-hero { position:relative; z-index:1; padding:60px 0 20px; }
.page-hero h1 { font-size:clamp(30px,4.4vw,46px); line-height:1.1; margin:0 0 14px; font-weight:800; letter-spacing:-.5px; }
.page-hero .lead { font-size:clamp(15px,1.6vw,17px); color:var(--muted); max-width:640px; margin:0; }
.prose { position:relative; z-index:1; max-width:820px; margin:0 auto; padding:20px 0 0; }
.prose section.block { background:linear-gradient(160deg,var(--panel),var(--bg-soft)); border:1px solid var(--line);
  border-radius:18px; padding:30px 32px; margin-bottom:20px; }
.prose h2 { font-size:20px; font-weight:800; margin:0 0 12px; }
.prose h2 .k { color:var(--gold); margin-right:8px; }
.prose p { color:var(--muted); font-size:14.5px; margin:0 0 12px; }
.prose p:last-child { margin-bottom:0; }
.prose b { color:var(--text); font-weight:700; }
.prose ul { margin:6px 0 0; padding:0; list-style:none; display:flex; flex-direction:column; gap:9px; }
.prose li { display:flex; gap:10px; align-items:flex-start; color:var(--muted); font-size:14px; }
.prose li svg { width:16px; height:16px; color:var(--gold-soft); flex:none; margin-top:3px; }
.prose a.inline { color:var(--gold); font-weight:600; }
.prose a.inline:hover { text-decoration:underline; }

/* i18n */
[data-i18n-en] { display:none; }
html[data-lang="en"] [data-i18n-zh] { display:none; }
html[data-lang="en"] [data-i18n-en] { display:revert; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation:none !important; transition:none !important; }
  .reveal { opacity:1; transform:none; }
}
@media (max-width: 860px) {
  /* keep the nav usable at the TOP on phones: wrap instead of hiding links */
  .nav-inner { height:auto; flex-wrap:wrap; padding:8px 0; gap:6px 10px; }
  .nav-links { margin-left:auto; flex-wrap:wrap; gap:4px 6px; }
  .nav-links a.link { padding:6px 8px; font-size:13px; }
}