@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root{
  --bg:#000000;
  --panel:#121212;
  --panel-2:#0b0b0b;
  --ink:#e6e6e6;
  --dim:#9a9a9a;
  --line:#1f1f1f;
  --line-2:#161616;
  --blue:#4f7cff;
  --blue-soft:rgba(79,124,255,.28);
  --deep:#0a1024;
  --gold:#d8b25e;
}

*,*::before,*::after{box-sizing:border-box}

html{
  background:var(--bg);
  color-scheme:dark;
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
a:focus-visible,button:focus-visible{outline:2px solid var(--blue);outline-offset:3px}
::selection{background:rgba(79,124,255,.35);color:#fff}

/* ---------- 顶栏：aside > nav > ul > li > a，品牌居中 ---------- */
.topbar{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(0,0,0,.9);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.topbar nav{padding:0 clamp(10px,3vw,34px)}
.topbar ul{
  position:relative;
  display:flex;
  align-items:center;
  gap:0;
  margin:0;
  padding:0;
  list-style:none;
  min-height:64px;
}
.topbar li{display:flex}
.topbar li.lead{margin-left:auto}
.topbar a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 11px;
  font-size:15.5px;
  font-weight:400;
  color:var(--dim);
  border-bottom:2px solid transparent;
  transition:color .18s ease,border-color .18s ease,text-shadow .18s ease;
}
.topbar a:hover{color:#fff;border-bottom-color:var(--blue);text-shadow:0 0 10px var(--blue-soft)}
.topbar .brand{
  position:absolute;
  left:50%;
  top:0;
  height:100%;
  transform:translateX(-50%);
  align-items:center;
}
.topbar .brand a{
  padding:0 8px;
  font-size:16px;
  font-weight:700;
  letter-spacing:.02em;
  color:#fff;
  border-bottom:2px solid transparent;
  white-space:nowrap;
  text-shadow:0 0 12px rgba(79,124,255,.32);
}
.topbar .brand a:hover{border-bottom-color:var(--gold);text-shadow:0 0 14px rgba(216,178,94,.4)}
.topbar .cta{margin-left:10px}
.topbar .cta a{
  min-height:42px;
  padding:0 16px;
  margin:0;
  font-size:14.5px;
  font-weight:500;
  color:#dde6ff;
  background:var(--deep);
  border:1px solid #24365f;
  border-bottom:2px solid var(--blue);
  transition:background .18s ease,box-shadow .18s ease;
}
.topbar .cta a:hover{background:#111c34;box-shadow:0 0 18px var(--blue-soft)}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  overflow:hidden;
  min-height:45vh;
  display:flex;
  flex-direction:column;
  padding:clamp(26px,6vh,58px) clamp(16px,4vw,40px) 0;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(760px 300px at 18% -30%,rgba(79,124,255,.13),transparent 70%),
    var(--bg);
}
.hero-txt{position:relative;z-index:3;max-width:820px;margin:0 auto;width:100%}
.hero-tag{
  display:inline-block;
  font-size:12.5px;
  letter-spacing:.24em;
  color:var(--gold);
  padding-bottom:6px;
  border-bottom:1px solid rgba(216,178,94,.35);
}
.hero h1{
  margin:18px 0 14px;
  font-size:clamp(29px,5.6vw,52px);
  line-height:1.22;
  letter-spacing:-.015em;
  color:#fff;
  text-shadow:0 0 22px rgba(79,124,255,.2);
}
.lede{
  margin:0 0 22px;
  max-width:33em;
  color:var(--dim);
  font-size:16.5px;
  line-height:1.7;
}
.hero-act{display:flex;flex-wrap:wrap;gap:12px}
.btn{
  display:inline-flex;
  align-items:center;
  min-height:46px;
  padding:0 22px;
  font-size:15.5px;
  font-weight:500;
  color:#e8eeff;
  background:var(--deep);
  border:1px solid #24365f;
  border-bottom:2px solid var(--blue);
  transition:background .18s ease,box-shadow .18s ease;
}
.btn:hover{background:#111c34;box-shadow:0 0 20px var(--blue-soft)}
.btn.ghost{background:#0d0d0d;border-color:#2a2a2a;border-bottom-color:#2a2a2a;color:var(--dim)}
.btn.ghost:hover{background:#151515;color:#fff;box-shadow:none}

.hero-fig{
  position:relative;
  margin:auto 0 0;
  padding-top:26px;
  max-width:1200px;
  width:100%;
  align-self:center;
}
.hero-big{
  position:absolute;
  right:-.06em;
  bottom:-.18em;
  z-index:0;
  font-size:clamp(88px,26vw,250px);
  font-weight:700;
  line-height:.85;
  letter-spacing:.06em;
  color:#0e0e0e;
  pointer-events:none;
  user-select:none;
}
.hero-fig img{
  position:relative;
  z-index:1;
  width:100%;
  max-height:34vh;
  object-fit:cover;
  border-bottom:2px solid #1b2b57;
}

/* ---------- 主区：main > div.wrap > article > section ---------- */
main{padding:clamp(26px,5vw,60px) clamp(16px,4vw,40px) clamp(40px,6vw,72px)}
.wrap{
  max-width:1160px;
  margin:0 auto;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(26px,4vw,54px);
  align-items:start;
}
.content{min-width:0}

.art-head{padding-bottom:24px;margin-bottom:28px;border-bottom:1px solid var(--line)}
.art-head h2{
  font-size:clamp(20px,3.1vw,26px);
  color:#fff;
  margin-bottom:12px;
}
.art-head p{color:var(--dim);font-size:15.5px;max-width:38em}

small.eb{
  display:block;
  font-size:12px;
  letter-spacing:.26em;
  color:var(--gold);
  margin-bottom:9px;
  font-weight:500;
}

.art-body>article{
  padding:0 0 30px;
  margin-bottom:32px;
  border-bottom:1px solid var(--line-2);
  scroll-margin-top:88px;
}
.art-body>article:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.art-body h2{
  font-size:clamp(20px,2.9vw,25px);
  color:#fff;
  margin:0 0 14px;
}
.art-body h3{font-size:18px;color:#f2f2f2;margin:26px 0 10px}
.art-body p{margin:0 0 16px;color:#c9c9c9}
.art-body strong{color:#fff;font-weight:700}
.art-body a{color:#9fb8ff;border-bottom:1px solid rgba(159,184,255,.35)}
.art-body a:hover{color:#fff;border-bottom-color:#fff}
.art-body ul,.art-body ol{margin:0 0 16px;padding-left:1.25em;color:#c9c9c9}
.art-body li{margin:0 0 8px}
.art-body li::marker{color:var(--blue)}
.art-body blockquote{
  margin:0 0 18px;
  padding:14px 18px;
  background:var(--panel);
  border-left:2px solid var(--blue);
  color:#dcdcdc;
}
.art-body blockquote p:last-child{margin:0}
.art-body img{margin:0 0 18px;border-bottom:2px solid #1b2b57}
.art-body table{width:100%;border-collapse:collapse;font-size:15px;margin:0 0 18px}
.art-body th,.art-body td{padding:10px;text-align:left;border-bottom:1px solid var(--line)}
.art-body th{color:#fff;background:var(--panel-2)}
.art-body code{font-size:.92em;background:var(--panel);padding:.1em .35em;color:#cfd8ff}
.art-body small{display:block;font-size:12px;letter-spacing:.26em;color:var(--gold);margin-bottom:9px}

/* ---------- 右侧栏 ---------- */
.rail{
  order:2;
  padding:20px 18px 18px;
  background:var(--panel);
  border:1px solid var(--line);
  border-bottom:2px solid var(--blue);
}
.rail-t{font-size:17px;color:#fff;margin:0 0 14px}
.rail nav ul{list-style:none;margin:0;padding:0}
.rail nav li+li{border-top:1px solid #1c1c1c}
.rail nav a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:42px;
  font-size:14.5px;
  color:#b6b6b6;
  transition:color .16s ease,padding-left .16s ease;
}
.rail nav a b{
  font-weight:500;
  font-size:12px;
  letter-spacing:.1em;
  color:#5d6a8c;
  min-width:2em;
}
.rail nav a:hover{color:#fff;padding-left:4px}
.rail nav a:hover b{color:var(--blue)}
.rail-note{
  margin:16px 0 0;
  padding-top:14px;
  border-top:1px solid #1c1c1c;
  font-size:13px;
  line-height:1.65;
  color:#868686;
}

/* ---------- 页脚 ---------- */
footer{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px 26px;
  padding:34px clamp(16px,4vw,40px) 22px;
  background:#050505;
  border-top:1px solid var(--line);
}
.f-brand{max-width:30em}
.f-logo{
  display:inline-block;
  font-size:clamp(21px,3.6vw,32px);
  font-weight:700;
  letter-spacing:-.02em;
  color:#fff;
  text-shadow:0 0 16px rgba(79,124,255,.24);
}
.f-brand p{margin:7px 0 0;font-size:13.5px;line-height:1.6;color:#868686}
.f-nav{display:flex;flex-wrap:wrap;gap:2px 14px;margin-left:auto}
.f-nav a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  font-size:13.5px;
  color:var(--dim);
  border-bottom:1px solid transparent;
}
.f-nav a:hover{color:#fff;border-bottom-color:var(--blue)}
.copy{
  width:100%;
  margin:0;
  padding-top:14px;
  border-top:1px solid #131313;
  text-align:center;
  font-size:12.5px;
  color:#6f6f6f;
}

/* ---------- 滚动显现 ---------- */
@media (prefers-reduced-motion:no-preference){
  html.js .rv{
    opacity:0;
    transform:translateY(14px);
    transition:opacity .52s ease,transform .52s ease;
  }
  html.js .rv.in{opacity:1;transform:none}
}

/* ---------- 断点 ---------- */
@media (min-width:1000px){
  .wrap{grid-template-columns:minmax(0,1fr) 286px}
  .rail{position:sticky;top:84px}
}

@media (max-width:900px){
  .topbar ul{flex-wrap:wrap;padding:6px 0;min-height:0}
  .topbar .brand{
    position:static;
    transform:none;
    order:-1;
    height:auto;
    margin-right:auto;
  }
  .topbar .brand a{min-height:44px;font-size:15px;padding-left:0}
  .topbar .lead{margin-left:0}
  .topbar a{padding:0 9px;font-size:14.5px}
  .topbar .cta{margin-left:0}
  .topbar .cta a{padding:0 14px;font-size:14px}
  .hero{min-height:0;padding-top:26px}
  .hero-fig img{max-height:none}
}

@media (max-width:560px){
  body{font-size:16.5px}
  .hero-act .btn{flex:1 1 auto;justify-content:center}
  .hero-big{bottom:auto;top:-.1em;right:-.1em;opacity:.85}
  .rail{padding:18px 16px}
  .f-nav{margin-left:0}
}
</｜DSML｜ parameter>
</｜DSML｜ invoke>
</｜DSML｜ calls>

button[aria-expanded]{min-width:44px;min-height:44px}