:root{--ink:#070707;--paper:#ffffff;--soft:#f4f4f4;--softer:#fafafa;--ox:#97000e;--ox-bright:#b40118;--line:rgba(7,7,7,0.08);--muted:rgba(7,7,7,0.56)}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
html,body{background:var(--paper);color:var(--ink);font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;-webkit-font-smoothing:antialiased}
body{font-size:16px;line-height:1.5;letter-spacing:-0.005em}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.nav{position:fixed;top:20px;left:0;right:0;z-index:50;display:flex;justify-content:center;pointer-events:none}
.nav-inner{pointer-events:auto;display:flex;align-items:center;gap:28px;padding:10px 10px 10px 24px;background:rgba(255,255,255,0.88);backdrop-filter:blur(12px) saturate(140%);-webkit-backdrop-filter:blur(12px) saturate(140%);border:1px solid var(--line);border-radius:999px;box-shadow:0 2px 20px rgba(7,7,7,0.04)}
.nav-logo img{height:29px;display:block}
.nav-links{display:flex;gap:24px}
.nav-links a{font-size:14px;transition:opacity 0.2s;white-space:nowrap}
.nav-links a:hover{opacity:0.55}
.nav-cta{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;background:var(--ox);color:var(--paper);border-radius:999px;font-size:13px;font-weight:500;white-space:nowrap;transition:all 0.3s}
.nav-cta:hover{background:var(--ox-bright);transform:translateY(-1px)}
.art-head{padding:150px 0 46px;background:var(--softer);border-bottom:1px solid var(--line);text-align:center}
.art-head .kicker{font-size:11px;letter-spacing:0.16em;text-transform:uppercase;font-weight:600;color:var(--ox);margin-bottom:14px}
.art-head h1{font-size:clamp(32px,4.6vw,54px);line-height:1.04;letter-spacing:-0.03em;font-weight:500;max-width:820px;margin:0 auto}
.art-head h1 em{font-style:italic;font-family:'Instrument Serif',serif;font-weight:400;color:var(--ox);letter-spacing:-0.02em}
.art-head .meta{margin-top:16px;font-size:13px;color:var(--muted)}
.wrap{max-width:720px;margin:0 auto;padding:0 24px}
article{padding:52px 0 24px}
article p{margin:0 0 20px;font-size:16.5px;line-height:1.7;color:rgba(7,7,7,0.82)}
article h2{font-size:26px;font-weight:500;letter-spacing:-0.02em;margin:38px 0 14px}
article ul{margin:0 0 20px;padding-left:22px}
article li{margin-bottom:10px;font-size:16px;line-height:1.6;color:rgba(7,7,7,0.82)}
article a{color:var(--ox);font-weight:500}
article a:hover{text-decoration:underline}
article table{width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14.5px}
article th{text-align:left;padding:10px 12px;background:var(--soft);font-weight:600;border:1px solid var(--line)}
article td{padding:10px 12px;border:1px solid var(--line);color:rgba(7,7,7,0.8)}
article .formula{background:var(--soft);border-radius:12px;padding:16px 20px;font-weight:600;text-align:center;font-size:18px;letter-spacing:-0.01em;color:var(--ink)}
.cta-box{margin:44px 0;padding:34px 32px;border-radius:20px;background:linear-gradient(180deg,#0a0305 0%,#1a0609 50%,#2a0a10 100%);color:#fff;text-align:center;box-shadow:0 20px 55px rgba(79,0,6,0.25)}
.cta-box h3{font-size:24px;font-weight:500;letter-spacing:-0.02em;margin-bottom:8px}
.cta-box h3 em{font-style:italic;font-family:'Instrument Serif',serif;font-weight:400;color:#e88890}
.cta-box p{font-size:14px;color:rgba(255,255,255,0.65);margin-bottom:18px}
.cta-box a{display:inline-flex;align-items:center;gap:10px;padding:14px 26px;background:#fff;color:var(--ox);border-radius:999px;font-size:14px;font-weight:600;transition:transform 0.25s,box-shadow 0.25s}
.cta-box a:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(255,255,255,0.2)}
.related{padding:10px 0 70px}
.related h3{font-size:13px;letter-spacing:0.14em;text-transform:uppercase;color:var(--muted);font-weight:600;margin-bottom:16px}
.rel-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.rel-card{display:block;padding:20px 22px;border:1px solid var(--line);border-radius:14px;background:var(--paper);transition:border-color 0.25s,box-shadow 0.25s}
.rel-card:hover{border-color:rgba(151,0,14,0.35);box-shadow:0 12px 32px rgba(7,7,7,0.07)}
.rel-card .k{font-size:10px;letter-spacing:0.14em;text-transform:uppercase;color:var(--ox);font-weight:600;margin-bottom:6px}
.rel-card .t{font-size:15.5px;font-weight:500;letter-spacing:-0.01em;line-height:1.35}
footer{padding:36px 0;border-top:1px solid var(--line);background:var(--softer);text-align:center;font-size:12.5px;color:var(--muted)}
footer a{color:var(--ox);font-weight:500}
.idx-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;padding:52px 0 80px}
.idx-grid .rel-card .d{font-size:13px;color:var(--muted);margin-top:8px;line-height:1.5}
@media(max-width:720px){.nav-links{display:none}.rel-grid,.idx-grid{grid-template-columns:1fr}.art-head{padding:130px 0 38px}}