:root{
  --bg:#0f1117;
  --panel:#151925;
  --panel-2:#1b2030;
  --panel-3:#23283a;
  --text:#e9ecf1;
  --muted:#a9b1c3;
  --line:rgba(255,255,255,.08);
  --brand:#5865F2;
  --brand-2:#7289da;
  --warn:#FEA166;
  --shadow:0 20px 60px rgba(0,0,0,.35);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  background:
    radial-gradient(circle at top left, rgba(88,101,242,.22), transparent 34%),
    radial-gradient(circle at top right, rgba(254,161,102,.12), transparent 26%),
    linear-gradient(180deg, #0b0d12 0%, var(--bg) 45%, #0b0d12 100%);
  color:var(--text);
}
a{color:inherit}
.top-progress{position:fixed;top:0;left:0;height:4px;width:0;background:linear-gradient(90deg,var(--brand),var(--warn));z-index:9999;box-shadow:0 0 18px rgba(88,101,242,.5)}
.wrap{max-width:1280px;margin:0 auto;padding:24px}
.shell{
  display:grid;
  grid-template-columns:280px minmax(0,1fr);
  gap:22px;
  align-items:start;
}
.card{
  background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.015));
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  backdrop-filter: blur(12px);
}
.hero{
  grid-column:1/-1;
  padding:28px;
  overflow:hidden;
  position:relative;
}
.hero:before{
  content:"";
  position:absolute;inset:-1px;
  background:radial-gradient(circle at top right, rgba(88,101,242,.22), transparent 28%);
  pointer-events:none;
}
.hero-inner{position:relative;display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between}
.brand-badge{
  display:inline-flex;align-items:center;gap:10px;
  padding:10px 14px;border-radius:999px;
  background:rgba(88,101,242,.14);
  border:1px solid rgba(88,101,242,.25);
  color:#dfe4ff;font-weight:700;font-size:14px;
}
.brand-dot{width:10px;height:10px;border-radius:999px;background:var(--warn);box-shadow:0 0 14px rgba(254,161,102,.7)}
.hero h1{margin:14px 0 8px;font-size:clamp(30px,4vw,52px);line-height:1.02;letter-spacing:-.03em}
.hero p{margin:0;color:var(--muted);max-width:760px;font-size:16px;line-height:1.7}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 16px;border-radius:14px;
  text-decoration:none;font-weight:700;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  transition:transform .18s ease, background .18s ease, border-color .18s ease;
}
.btn:hover{transform:translateY(-2px);background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.16)}
.btn.primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));border-color:transparent;color:#fff}
.btn.primary:hover{background:linear-gradient(135deg,#6774ff,#8a9cff)}
.btn.warn{background:rgba(254,161,102,.12);color:#ffd6be;border-color:rgba(254,161,102,.22)}
.sidebar{
  position:sticky;top:24px;
  padding:18px;
}
.sidebar h3{margin:4px 0 14px;font-size:14px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.toc{display:flex;flex-direction:column;gap:8px}
.toc a{
  text-decoration:none;
  color:var(--muted);
  padding:10px 12px;border-radius:12px;
  border:1px solid transparent;
  transition:.18s ease;
  font-size:14px;
}
.toc a:hover,.toc a.active{color:#fff;background:rgba(88,101,242,.12);border-color:rgba(88,101,242,.18)}
.search{
  width:100%;
  margin-bottom:12px;
  padding:12px 14px;
  border-radius:14px;
  border:1px solid var(--line);
  background:rgba(0,0,0,.16);
  color:var(--text);
  outline:none;
}
.search::placeholder{color:#8f96a9}
.meta{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:16px
}
.meta .mini{
  padding:12px 14px;border-radius:16px;background:rgba(255,255,255,.03);border:1px solid var(--line)
}
.meta .mini .k{display:block;color:var(--muted);font-size:12px;margin-bottom:4px}
.meta .mini .v{font-weight:700}
.content{padding:22px}
.section{
  padding:24px;
  border-radius:20px;
  background:rgba(255,255,255,.03);
  border:1px solid var(--line);
  margin-bottom:16px;
}
.section h2{margin:0 0 12px;font-size:24px;letter-spacing:-.02em}
.section h3{margin:18px 0 10px;font-size:18px}
.section p,.section li{color:#d6d9e3;line-height:1.8;font-size:15px}
.section ul{margin:0;padding-left:20px}
.note{
  padding:14px 16px;
  border-left:4px solid var(--warn);
  background:rgba(254,161,102,.08);
  border-radius:12px;
  color:#ffe5d5;
}
.footer{
  grid-column:1/-1;
  display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;
  padding:18px 4px 0;color:var(--muted);font-size:14px;
}
.footer-links{display:flex;gap:16px;flex-wrap:wrap}
.footer-links a{text-decoration:none;color:var(--muted)}
.footer-links a:hover{color:#fff}
.back-top{
  position:fixed;right:22px;bottom:22px;
  width:48px;height:48px;border-radius:999px;border:none;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;font-size:20px;font-weight:900;cursor:pointer;
  box-shadow:var(--shadow);display:none;
}
@media (max-width: 980px){
  .shell{grid-template-columns:1fr}
  .sidebar{position:relative;top:auto}
}
@media (max-width: 640px){
  .wrap{padding:14px}
  .content,.sidebar,.hero{padding:18px}
  .meta{grid-template-columns:1fr}
}