:root{
  --brand:#F0601E;--brand-press:#D24E10;--brand-2:#FF8A3D;--deep:#3B1C0A;--deep-2:#24120A;
  --bg:#FFF8F2;--card:#FFFFFF;--ink:#241710;--ink-soft:#5A4335;--muted:#8C776A;--line:#F1E3D8;--soft:#FFEBDC;
  --f:'Plus Jakarta Sans',-apple-system,BlinkMacSystemFont,'Helvetica Neue',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{font-family:var(--f);color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--brand);text-decoration:none}
img,svg{display:block;flex:none}

/* top bar */
.topbar{position:sticky;top:0;z-index:20;background:rgba(255,248,242,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.topbar-in{max-width:1120px;margin:0 auto;padding:0 24px;height:68px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:800;font-size:1.2rem;letter-spacing:-.02em}
.brand img{width:36px;height:36px;border-radius:11px}
.back{display:inline-flex;align-items:center;gap:6px;font-size:.9rem;font-weight:700;color:var(--brand);padding:9px 16px;border-radius:999px;background:var(--soft);transition:background .2s,color .2s}
.back:hover{background:var(--brand);color:#fff}

/* page hero */
.page-hero{position:relative;overflow:hidden;background:var(--brand);color:#fff}
.page-hero::before{content:"";position:absolute;right:-140px;top:-160px;width:460px;height:460px;border-radius:50%;border:70px solid rgba(255,255,255,.08)}
.page-hero::after{content:"";position:absolute;left:-90px;bottom:-170px;width:300px;height:300px;border-radius:50%;background:rgba(255,255,255,.06)}
.page-hero-in{position:relative;z-index:1;max-width:1120px;margin:0 auto;padding:58px 24px 96px}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:.76rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;opacity:.9}
.kicker::before{content:"";width:18px;height:2px;border-radius:2px;background:currentColor}
.page-hero h1{font-size:clamp(2.3rem,5.4vw,3.8rem);line-height:1.02;letter-spacing:-.035em;font-weight:800;margin-top:14px}
.page-hero p{margin-top:14px;max-width:620px;opacity:.9}
.release_date{display:inline-flex;align-items:center;gap:8px;margin-top:22px;font-size:.86rem;font-weight:700;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);padding:6px 14px;border-radius:999px}

/* layout */
.layout{max-width:1120px;margin:-56px auto 0;padding:0 24px 72px;display:grid;grid-template-columns:250px minmax(0,1fr);gap:28px;align-items:start;position:relative;z-index:2}
.toc{position:sticky;top:92px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px 12px 14px;box-shadow:0 20px 40px -32px rgba(120,40,0,.4)}
.toc-title{font-size:.72rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);padding:0 10px 8px}
.toc ol{list-style:none;counter-reset:t}
.toc li{counter-increment:t}
.toc a{display:flex;gap:10px;padding:7px 10px;border-radius:10px;font-size:.86rem;font-weight:600;line-height:1.4;color:var(--ink-soft);transition:background .15s,color .15s}
.toc a::before{content:counter(t,decimal-leading-zero);font-weight:800;color:#C9B4A5;font-variant-numeric:tabular-nums}
.toc a:hover{background:var(--bg);color:var(--brand)}
.toc a.on{background:var(--soft);color:var(--brand)}
.toc a.on::before{color:var(--brand)}

.doc{background:#fff;border:1px solid var(--line);border-radius:28px;box-shadow:0 30px 60px -44px rgba(120,40,0,.45);padding:12px 44px 36px;min-width:0}
.intro{padding:30px 0 26px;border-bottom:1px solid var(--line)}
.intro p{font-size:1rem;color:var(--ink-soft);margin-bottom:12px}
.intro p:last-child{margin-bottom:0}
.notice{background:var(--bg);border-left:4px solid var(--brand);border-radius:0 14px 14px 0;padding:16px 18px;font-size:.88rem!important;font-weight:700;letter-spacing:.01em;color:var(--ink)!important;line-height:1.65}

.sec{padding:30px 0 26px;border-bottom:1px solid var(--line)}
.sec:last-child{border-bottom:0;padding-bottom:4px}
.sec h2{display:flex;align-items:baseline;gap:14px;font-size:1.32rem;line-height:1.25;letter-spacing:-.015em;font-weight:800;margin-bottom:14px}
.sec h2 .no{flex:none;font-size:.82rem;font-weight:800;color:var(--brand);background:var(--soft);border-radius:8px;padding:3px 8px;font-variant-numeric:tabular-nums;position:relative;top:-2px}
.sec h3{font-size:1.02rem;font-weight:800;margin:18px 0 8px}
.sec p{font-size:.98rem;color:var(--ink-soft);margin-bottom:12px}
.sec p:last-child{margin-bottom:0}
.sec ul{list-style:none;display:grid;gap:8px;margin:4px 0 14px}
.sec li{position:relative;padding-left:24px;font-size:.98rem;color:var(--ink-soft);line-height:1.65}
.sec li::before{content:"";position:absolute;left:4px;top:.62em;width:8px;height:8px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 3px var(--soft)}
.sec strong,.sec b{color:var(--ink);font-weight:700}
.sec a{font-weight:700}
.contact{display:grid;gap:10px;margin-top:6px}
.contact div{display:flex;gap:12px;align-items:center;background:var(--bg);border-radius:14px;padding:12px 16px;font-size:.95rem}
.contact .ic{width:34px;height:34px;border-radius:10px;background:#fff;color:var(--brand);display:grid;place-items:center;flex:none}
.contact small{display:block;color:var(--muted);font-size:.78rem;font-weight:700}
.contact span{color:var(--ink);font-weight:700;word-break:break-word}

/* footer */
.site-foot{background:var(--deep-2);color:rgba(255,255,255,.62);font-size:.88rem}
.site-foot-in{max-width:1120px;margin:0 auto;padding:28px 24px;display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;align-items:center}
.site-foot a{color:rgba(255,255,255,.85)}
.site-foot a:hover{color:#FFB27F}
.site-foot nav{display:flex;gap:22px;flex-wrap:wrap}

@media (max-width:900px){
  .layout{grid-template-columns:1fr;gap:16px}
  .toc{position:static}
  .toc ol{display:grid;grid-template-columns:1fr 1fr;gap:2px}
}
@media (max-width:600px){
  .topbar-in{padding:0 16px}
  .page-hero-in{padding:40px 16px 80px}
  .layout{padding:0 16px 48px}
  .toc ol{grid-template-columns:1fr}
  .doc{padding:4px 20px 24px;border-radius:22px}
  .sec h2{font-size:1.14rem;gap:10px}
  .sec p,.sec li{font-size:.94rem}
  .back span{display:none}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}