*{box-sizing:border-box;margin:0;padding:0}
html{background:#0b1620;-webkit-text-size-adjust:100%}
body{font-family:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;color:#dcecf1;background:radial-gradient(1200px 500px at 50% -120px,rgba(45,212,238,.12),transparent 70%),#0b1620;min-height:100vh;line-height:1.65}
a{color:#7af1ff;text-decoration:none}
a:hover{text-decoration:underline}
.lg-top{max-width:880px;margin:0 auto;padding:18px 16px 6px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.lg-logo{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.04em;color:#fff;font-size:17px}
.lg-logo b{color:#7af1ff}
.lg-logo:hover{text-decoration:none}
.lg-back{font-size:13px;font-weight:700;padding:9px 14px;border-radius:12px;border:1px solid rgba(45,212,238,.28);background:rgba(45,212,238,.08)}
.lg-wrap{max-width:880px;margin:0 auto;padding:10px 16px 60px}
.lg-nav{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 18px}
.lg-nav a{font-size:12.5px;font-weight:600;color:rgba(220,236,241,.78);padding:8px 12px;border-radius:999px;border:1px solid rgba(120,210,225,.15);background:rgba(15,33,48,.7)}
.lg-nav a:hover{text-decoration:none;border-color:rgba(45,212,238,.5);color:#fff}
.lg-nav a.on{background:rgba(45,212,238,.14);border-color:#2dd4ee;color:#7af1ff}
.lg-card{background:linear-gradient(180deg,#0f2130,#0b1823);border:1px solid rgba(120,210,225,.14);border-radius:26px;padding:34px 34px 30px;box-shadow:0 18px 50px rgba(0,0,0,.32)}
h1{font-size:30px;line-height:1.2;font-weight:800;letter-spacing:-.02em;color:#fff}
.lg-meta{margin-top:8px;font-size:12.5px;color:rgba(200,225,235,.5)}
.lg-intro{margin:18px 0;padding:14px 16px;border-radius:16px;background:rgba(45,212,238,.07);border:1px solid rgba(45,212,238,.2);font-size:14.5px;color:rgba(230,244,248,.9)}
.lg-toc{margin:6px 0 10px;border:1px solid rgba(120,210,225,.13);border-radius:16px;padding:12px 16px;background:rgba(7,20,32,.45)}
.lg-toc summary{cursor:pointer;font-weight:700;font-size:14px;color:rgba(230,244,248,.9)}
.lg-toc ol{margin:10px 0 2px 20px;font-size:14px;columns:2;column-gap:28px}
.lg-toc li{margin:3px 0;break-inside:avoid}
section{margin-top:28px;scroll-margin-top:16px}
h2{font-size:19px;font-weight:800;color:#fff;margin-bottom:12px;padding-bottom:9px;border-bottom:1px solid rgba(120,210,225,.14)}
p{margin:10px 0;font-size:14.8px;color:rgba(222,238,244,.88)}
.n{display:inline-block;min-width:38px;font-weight:700;color:#7af1ff;font-variant-numeric:tabular-nums}
mark.ph{background:rgba(255,194,74,.18);color:#ffc24a;border:1px dashed rgba(255,194,74,.6);border-radius:6px;padding:0 6px;font-weight:700}
.lg-foot{max-width:880px;margin:0 auto;padding:6px 16px 40px;text-align:center;font-size:12.5px;color:rgba(200,225,235,.5)}
@media (max-width:640px){
  .lg-card{padding:22px 16px 20px;border-radius:20px}
  h1{font-size:24px}
  .lg-toc ol{columns:1}
  .n{min-width:34px}
  p{font-size:14.5px}
}
@media print{html,body{background:#fff;color:#000}.lg-top,.lg-nav,.lg-foot,.lg-toc{display:none}.lg-card{border:none;box-shadow:none;background:#fff;padding:0}h1,h2,p,.n{color:#000}a{color:#000}}
@media (max-width:640px){
  .lg-nav{flex-wrap:nowrap;overflow-x:auto;margin:10px -16px 16px;padding:2px 16px 8px;scrollbar-width:none}
  .lg-nav::-webkit-scrollbar{display:none}
  .lg-nav a{white-space:nowrap;flex-shrink:0}
}