:root{
  --bg:#0d1016; --bg2:#121722; --card:#151b26; --card2:#1a2130;
  --line:rgba(255,255,255,.10); --line2:rgba(255,255,255,.06);
  --t1:#eceef2; --t2:#a6afbd; --t3:#7b8492;
  --amber:#e0a05a; --amber-d:#c98643; --amber-soft:rgba(224,160,90,.12);
  --teal:#69b3a4; --ok:#5fbf8a; --ok-soft:rgba(95,191,138,.12);
  --r:16px; --r2:14px; --wrap:880px;
  --shadow:0 18px 50px -22px rgba(0,0,0,.75);
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  background:var(--bg); color:var(--t1); line-height:1.78;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%}
a{color:var(--amber);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px;width:100%}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------------- 顶栏 ---------------- */
header.site{
  position:sticky;top:0;z-index:30;
  background:rgba(13,16,22,.72);backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line2);
}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:15px;color:var(--t1)}
.brand img{width:27px;height:27px;border-radius:8px}
nav.site{display:flex;gap:4px}
nav.site a{
  color:var(--t2);font-size:13.5px;padding:6px 11px;border-radius:8px;
}
nav.site a:hover{color:var(--t1);background:rgba(255,255,255,.06);text-decoration:none}
nav.site a.on{color:var(--t1);font-weight:600;background:rgba(255,255,255,.08)}

/* ---------------- Hero ---------------- */
.hero{
  position:relative;overflow:hidden;
  min-height:min(74vh,620px);
  display:flex;align-items:center;
  border-bottom:1px solid var(--line2);
}
.hero .bg{
  position:absolute;inset:0;
  background:#0a0d12 url("/assets/hero.jpg") center 42%/cover no-repeat;
  transform:scale(1.02);
}
@media(max-width:700px){
  .hero .bg{background-image:url("/assets/hero-mobile.jpg");background-position:center 38%}
}
.hero .scrim{
  position:absolute;inset:0;
  background:
    radial-gradient(120% 90% at 72% 22%, rgba(224,160,90,.16), transparent 55%),
    linear-gradient(180deg, rgba(9,12,17,.72) 0%, rgba(9,12,17,.62) 42%, rgba(13,16,22,.94) 88%, var(--bg) 100%);
}
.hero .wrap{position:relative;z-index:2;padding-top:76px;padding-bottom:76px;text-align:center}
.hero .eyebrow{
  display:inline-flex;align-items:center;gap:7px;
  font-size:11.5px;letter-spacing:.14em;color:var(--amber);
  border:1px solid rgba(224,160,90,.34);background:rgba(224,160,90,.10);
  padding:5px 14px;border-radius:999px;margin-bottom:20px;font-weight:600;
}
.hero h1{
  font-size:clamp(27px,5.4vw,44px);line-height:1.34;font-weight:700;letter-spacing:-.5px;
  text-shadow:0 2px 26px rgba(0,0,0,.62);
}
.hero h1 .hl{color:var(--amber)}
.hero p.lead{
  color:#cbd2dd;font-size:clamp(14px,2.4vw,16.5px);margin:16px auto 0;max-width:610px;
  text-shadow:0 1px 14px rgba(0,0,0,.6);
}
.hero .cta{margin-top:30px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 24px;border-radius:12px;font-size:14.5px;font-weight:600;
  border:1px solid var(--line);background:rgba(255,255,255,.07);color:var(--t1);
  transition:transform .12s ease, background .16s ease, border-color .16s ease;
}
.btn:hover{text-decoration:none;background:rgba(255,255,255,.12);transform:translateY(-1px)}
.btn.primary{
  background:linear-gradient(180deg,var(--amber) 0%,var(--amber-d) 100%);
  border-color:transparent;color:#2a1c0c;box-shadow:0 12px 30px -12px rgba(224,160,90,.7);
}
.btn.primary:hover{background:linear-gradient(180deg,#eaa96a 0%,#d2914c 100%)}
.btn.ghost{background:transparent}
.btn .sz{font-weight:400;opacity:.72;font-size:12.5px}

/* ---------------- 通用区块 ---------------- */
main{display:block}
section.block{padding:56px 0}
section.block.tight{padding:40px 0}
section.block > h2{
  font-size:clamp(19px,3.4vw,23px);font-weight:700;letter-spacing:-.2px;margin-bottom:8px;
}
section.block > p.sub{color:var(--t2);font-size:14px;margin-bottom:26px}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}
.grid.g3{grid-template-columns:repeat(3,1fr)}
.card{
  background:var(--card);border:1px solid var(--line2);border-radius:var(--r);padding:22px;
}
.card h3{font-size:15px;font-weight:600;margin-bottom:7px;display:flex;align-items:center;gap:9px}
.card p{font-size:13.5px;color:var(--t2);line-height:1.75}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.93em;
  background:rgba(255,255,255,.07);border-radius:5px;padding:1px 5px;
  color:var(--t1);overflow-wrap:anywhere}
.card .ico{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;
  background:var(--amber-soft);color:var(--amber);
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;
}

ul.plain{list-style:none}
ul.plain li{
  font-size:13.5px;color:var(--t2);padding:11px 0 11px 24px;position:relative;
  border-bottom:1px solid var(--line2);
}
ul.plain li:last-child{border-bottom:0}
ul.plain li:before{
  content:"";position:absolute;left:7px;top:19px;width:6px;height:6px;border-radius:50%;
  background:var(--amber);opacity:.7;
}
ul.plain li b{color:var(--t1);font-weight:600}

/* ---------------- 下载区 ---------------- */
.dl{display:grid;grid-template-columns:1.15fr .85fr;gap:16px;align-items:stretch}
/* 三个平台并列时改成等宽三列（首页/下载页共用） */
.dl.three{grid-template-columns:repeat(3,1fr)}
.dl.three .box{padding:24px}
.dl.three .meta{line-height:1.95}
.dl .box{
  background:linear-gradient(180deg,var(--card2) 0%,var(--card) 100%);
  border:1px solid var(--line);border-radius:var(--r);padding:26px;box-shadow:var(--shadow);
}
.dl .box.soon{background:var(--card);border-style:dashed;box-shadow:none}
.dl .plat{
  display:inline-flex;align-items:center;gap:8px;font-size:11.5px;font-weight:700;
  letter-spacing:.1em;color:var(--teal);text-transform:uppercase;margin-bottom:12px;
}
.dl .box.soon .plat{color:var(--t3)}
.dl h3{font-size:19px;font-weight:700;margin-bottom:6px}
.dl .meta{font-size:12.5px;color:var(--t3);line-height:2;margin:12px 0 16px;
  font-variant-numeric:tabular-nums;word-break:break-all}
.dl .meta b{color:var(--t2);font-weight:600}
.dl .meta code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11.5px;
  background:rgba(255,255,255,.06);border-radius:5px;padding:1px 6px;color:var(--t2);
}
.dl .btn{width:100%;justify-content:center}
.dl .note{font-size:12px;color:var(--t3);margin-top:12px;line-height:1.8}
.dl .tag{
  display:inline-block;font-size:11px;font-weight:700;padding:2px 9px;border-radius:6px;
  background:var(--amber-soft);color:var(--amber);margin-left:8px;vertical-align:middle;
}
.steps{counter-reset:s;margin-top:20px}
.steps li{
  list-style:none;counter-increment:s;position:relative;
  font-size:13.5px;color:var(--t2);padding:0 0 14px 34px;
}
.steps li:before{
  content:counter(s);position:absolute;left:0;top:2px;
  width:22px;height:22px;border-radius:7px;background:var(--amber-soft);color:var(--amber);
  font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.steps li b{color:var(--t1)}

/* ---------------- FAQ ---------------- */
.faq details{
  background:var(--card);border:1px solid var(--line2);border-radius:var(--r2);
  padding:0;margin-bottom:10px;overflow:hidden;
}
.faq summary{
  cursor:pointer;list-style:none;padding:16px 20px;font-size:14.5px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{
  content:"+";color:var(--amber);font-size:17px;font-weight:400;flex:0 0 auto;
}
.faq details[open] summary:after{content:"–"}
.faq details p{font-size:13.5px;color:var(--t2);padding:0 20px 17px;margin:0}

/* ---------------- 文档页 ---------------- */
.doc{background:var(--card);border:1px solid var(--line2);border-radius:var(--r);padding:34px 32px}
.doc h1{font-size:23px;font-weight:700;margin-bottom:7px}
.doc .meta{
  font-size:12.5px;color:var(--t3);padding-bottom:16px;border-bottom:1px solid var(--line2);margin-bottom:10px;
}
.doc h3{font-size:15px;font-weight:600;color:var(--t1);margin:26px 0 7px}
.doc h4{font-size:13.5px;font-weight:600;color:var(--t1);margin:18px 0 5px}
.doc p{font-size:13.5px;color:var(--t2);margin:9px 0}
.doc b{color:var(--t1);font-weight:600}
.doc .note{
  background:var(--ok-soft);color:#bfe8d0;font-size:13px;border-radius:12px;
  padding:14px 17px;margin-top:24px;line-height:1.8;
}

/* ---------------- 页脚 ---------------- */
footer.site{
  margin-top:20px;border-top:1px solid var(--line2);background:#0a0d12;
  padding:30px 0 38px;text-align:center;
}
footer.site .links{margin-bottom:14px;display:flex;gap:6px;justify-content:center;flex-wrap:wrap}
footer.site .links a{color:var(--t2);font-size:13px;padding:5px 9px;border-radius:7px}
footer.site .links a:hover{color:var(--t1);background:rgba(255,255,255,.06);text-decoration:none}
footer.site .icp{font-size:12.5px;color:var(--t3);display:block;line-height:2}
footer.site .icp a{color:var(--t3)}
footer.site .copy{font-size:11.5px;color:#5f6773;margin-top:10px;letter-spacing:.5px}

/* ---------------- 响应式 ---------------- */
@media(max-width:760px){
  .dl{grid-template-columns:1fr}
  .dl.three{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr}
  .grid.g3{grid-template-columns:1fr}
  section.block{padding:40px 0}
  .hero{min-height:auto}
  .hero .wrap{padding-top:56px;padding-bottom:56px}
  .doc{padding:24px 20px}
  nav.site a{padding:6px 8px;font-size:13px}
  header.site .wrap{height:54px}
  .brand{font-size:14px}
}

@media(max-width:430px){
  nav.site{overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;max-width:64vw}
  nav.site::-webkit-scrollbar{display:none}
  nav.site a{white-space:nowrap}
}