:root{
  --bg:#1d1f24;
  --panel:#171a20;
  --line:rgba(255,255,255,.1);
  --text:#f5f7fb;
  --muted:#c1c8d3;
  --dim:#8f97a6;
  --blue:#2f7ef9;
  --blue-2:#4f8cff;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:Inter,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;
  -webkit-font-smoothing:antialiased
}
a{text-decoration:none;color:inherit}

.topbar{
  position:sticky;top:0;z-index:60;height:66px;
  border-bottom:1px solid var(--line);
  background:rgba(29,31,36,.9);backdrop-filter:blur(12px)
}
.topbar-inner{
  height:100%;max-width:1700px;margin:0 auto;padding:0 18px;
  display:flex;align-items:center;gap:14px
}
.brand{display:flex;align-items:center;gap:10px;min-width:160px}
.brand img{width:30px;height:30px;border-radius:8px}
.brand span{font-size:16px;font-weight:600;letter-spacing:-.01em;line-height:1}
.search{position:relative;max-width:560px;flex:1}
.search input{
  width:100%;height:40px;border-radius:11px;border:1px solid rgba(255,255,255,.14);
  background:rgba(11,14,20,.28);color:var(--muted);font-size:14px;padding:0 88px 0 14px
}
.search input:focus{
  outline:none;border-color:rgba(79,140,255,.6);box-shadow:0 0 0 2px rgba(47,126,249,.18)
}
.search-kbd{
  position:absolute;right:10px;top:50%;transform:translateY(-50%);
  font-size:11px;color:var(--dim);padding:4px 8px;border-radius:8px;
  border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04)
}
.top-actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.icon-btn{
  width:38px;height:38px;border-radius:10px;border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.03);color:var(--muted);cursor:pointer
}

.layout{
  max-width:1700px;margin:0 auto;display:grid;grid-template-columns:320px minmax(0,1fr);
  min-height:calc(100vh - 66px)
}
.sidebar-wrap{padding:18px 14px 14px}
.sidebar{
  background:var(--panel);border:1px solid rgba(255,255,255,.08);border-radius:18px;
  height:calc(100vh - 98px);overflow-y:auto;padding:12px 8px 14px
}
.nav-title{
  color:#f1f4f8;font-weight:700;font-size:12px;text-transform:uppercase;
  letter-spacing:.04em;margin:14px 10px 6px
}
.nav-link{
  display:block;color:var(--muted);font-size:16px;border-radius:9px;
  padding:7px 10px;margin:2px 6px;line-height:1.35
}
.nav-link:hover{background:rgba(255,255,255,.05);color:#fff}
.nav-link.active{
  background:rgba(47,126,249,.16);color:var(--blue-2);
  border:1px solid rgba(47,126,249,.28)
}
.powered{
  margin:12px 8px 2px;display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:10px 12px;
  color:#d7dfeb;font-size:14px
}

.content{padding:30px 36px 70px;min-width:0}
.article{max-width:850px;margin:0 auto}
.cover{
  margin:8px 0 26px;overflow:hidden;border-radius:16px;
  border:1px solid rgba(255,255,255,.08);background:#11151f;
  aspect-ratio:16/5.6
}
.cover img{
  width:100%;height:100%;display:block;object-fit:cover;object-position:center center
}
.cover.cover-intro{
  aspect-ratio:16/4.4;
  position:relative;
}
.cover.cover-intro img{
  object-position:center 40%;
}
.cover.cover-intro::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:rgba(255,255,255,.78);
}

.article-top{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:12px}
.kicker{
  font-size:13px;font-weight:700;color:var(--blue);
  text-transform:uppercase;letter-spacing:.07em
}
.copy-btn{
  border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.02);
  color:#dfe6f0;border-radius:10px;padding:7px 12px;font-size:14px;cursor:pointer
}
.copy-btn:hover{background:rgba(255,255,255,.06)}

.markdown h1{font-size:clamp(44px,4.2vw,58px);line-height:1.08;margin:0 0 20px;letter-spacing:-.02em}
.markdown h2{font-size:clamp(31px,3.1vw,40px);line-height:1.16;margin:30px 0 14px;letter-spacing:-.01em}
.markdown h3,.markdown h4{font-size:clamp(27px,2.5vw,34px);line-height:1.2;margin:24px 0 10px;color:var(--blue)}
.markdown p,.markdown li{font-size:16px;color:var(--muted);line-height:1.6;margin:0 0 16px}
.markdown ul,.markdown ol{padding-left:22px;margin:0 0 16px}
.markdown figure{margin:18px 0}
.markdown img{max-width:100%;height:auto;display:block;border-radius:12px}
.markdown figcaption{font-size:13px;color:var(--dim);margin-top:8px}
.markdown a{color:var(--blue)}
.markdown a:hover{text-decoration:underline}
.markdown strong{color:#f3f6fb}
.markdown mark{background:transparent;color:inherit;padding:0}
.markdown .accent{color:var(--blue-2)}
.markdown code{
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);
  border-radius:7px;padding:2px 7px;color:#dce8ff
}
.markdown pre{
  background:#0f131b;border:1px solid rgba(255,255,255,.14);border-radius:12px;
  padding:14px;overflow:auto;margin:0 0 18px
}
.markdown pre code{background:none;border:none;padding:0}
.markdown blockquote{
  margin:12px 0 16px;padding:6px 0 6px 14px;border-left:3px solid rgba(47,126,249,.7)
}
.meta{margin-top:28px;font-size:13px;color:var(--dim)}
.back-home{display:inline-flex;margin-top:10px;font-size:14px;color:#d7deea}
.back-home:hover{color:#fff}

@media (max-width:1260px){
  .layout{grid-template-columns:1fr}
  .sidebar-wrap{display:none}
  .content{padding:22px 16px 48px}
  .top-actions{display:none}
  .cover{aspect-ratio:16/7}
  .cover.cover-intro{aspect-ratio:16/5.4}
  .cover.cover-intro img{object-position:center 42%}
}