:root{
  --navy:#12162b;
  --navy2:#1b2140;
  --gold:#f4b23a;
  --gold-ink:#3a2504;
  --paper:#f6f3ea;
  --line:#2a3057;
  --teal:#38d3ae;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--navy);color:var(--paper)}
a{color:inherit}
img{max-width:100%;display:block}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}

/* header */
.site-header{position:sticky;top:0;z-index:40;background:rgba(18,22,43,.94);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand-mark{width:34px;height:34px;border-radius:9px}
.brand-word{font-weight:800;font-size:1.14rem;color:#fff;letter-spacing:.2px}
.brand-word em{font-style:normal;color:var(--gold)}
.pill-cta{display:inline-flex;align-items:center;gap:8px;background:var(--gold);color:var(--gold-ink);font-weight:800;padding:11px 20px;border-radius:999px;text-decoration:none;font-size:.94rem;box-shadow:0 6px 18px rgba(244,178,58,.25)}
.pill-cta:hover{filter:brightness(1.06)}
.pill-ghost{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);color:var(--paper);padding:10px 18px;border-radius:999px;text-decoration:none;font-size:.94rem}

/* hero */
.hero{padding:52px 0 40px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.hero-kicker{display:inline-block;font-size:.78rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--teal);border:1px solid rgba(56,211,174,.4);padding:5px 12px;border-radius:999px}
.hero h1{margin:16px 0 14px;font-size:clamp(1.9rem,3.6vw,2.7rem);line-height:1.12;font-weight:800;color:#fff}
.hero p.lead{color:#c9cde0;font-size:1.05rem;line-height:1.6;margin:0 0 22px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.step-preview{background:var(--navy2);border:1px solid var(--line);border-radius:18px;padding:22px}
.step-preview p.spt{margin:0 0 14px;font-weight:800;color:#fff;font-size:.98rem}
.mini-step{display:flex;gap:12px;align-items:flex-start;padding:9px 0;border-top:1px solid var(--line)}
.mini-step:first-of-type{border-top:none}
.mini-num{flex:0 0 auto;width:24px;height:24px;border-radius:50%;background:var(--gold);color:var(--gold-ink);font-weight:800;font-size:.8rem;display:flex;align-items:center;justify-content:center}
.mini-step p{margin:0;color:#dfe2f0;font-size:.9rem;line-height:1.4}

/* content shell */
.content-shell{background:var(--paper);color:#1c1f30}
.content-shell .wrap{padding-top:44px;padding-bottom:44px}
.content-grid{display:grid;grid-template-columns:220px 1fr;gap:40px}
.toc{position:sticky;top:88px;align-self:start;border-left:3px solid var(--gold);padding-left:16px}
.toc p.toc-title{margin:0 0 10px;font-weight:800;font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:#6b6f8a}
.toc a{display:block;padding:6px 0;color:#3a3d55;text-decoration:none;font-size:.92rem;border-bottom:1px dashed #ddd8c8}
.toc a:hover{color:var(--navy)}
.article h2{font-size:1.5rem;margin:34px 0 12px;color:#171a2b}
.article h2:first-child{margin-top:0}
.article h3{font-size:1.12rem;margin:22px 0 8px;color:#171a2b}
.article p{line-height:1.68;color:#33364a;margin:0 0 14px}
.article ul{margin:0 0 16px;padding-left:20px;color:#33364a;line-height:1.6}
.article a{color:#8a5b00;text-decoration:underline}

/* step timeline */
.timeline{margin:18px 0 30px;border-radius:16px;overflow:hidden;border:1px solid #e4dfc9}
.tl-step{display:grid;grid-template-columns:56px 1fr;gap:16px;padding:18px 20px;background:#fff}
.tl-step:nth-child(even){background:#fbf7ea}
.tl-num{width:36px;height:36px;border-radius:50%;background:var(--navy);color:var(--gold);font-weight:800;display:flex;align-items:center;justify-content:center}
.tl-step h3{margin:2px 0 6px}
.tl-step p{margin:0;color:#33364a;line-height:1.6}

/* info box */
.info-box{background:#12162b0d;border:1px solid #dcd6bd;border-radius:14px;padding:20px 22px;margin:20px 0 28px}
.info-box p.ib-title{margin:0 0 10px;font-weight:800;color:#171a2b}
.coin-row{display:flex;gap:14px;flex-wrap:wrap}
.coin-tag{flex:1 1 220px;background:#fff;border:1px solid #e4dfc9;border-radius:12px;padding:14px 16px}
.coin-tag .ct-badge{display:inline-block;font-weight:800;font-size:.78rem;padding:3px 9px;border-radius:6px;background:var(--navy);color:var(--gold);margin-bottom:8px}
.coin-tag p{margin:0;font-size:.9rem;color:#3a3d55;line-height:1.5}

/* faq */
.faq-block h3{cursor:pointer;position:relative;padding-right:26px;border-top:1px solid #e4dfc9;padding-top:16px}
.faq-block h3:first-child{border-top:none}
.faq-block h3::after{content:"+";position:absolute;right:0;top:14px;font-weight:800;color:#8a5b00}
.faq-block h3[aria-expanded="true"]::after{content:"–"}
.faq-block p{display:none;margin-top:6px}
.faq-block h3[aria-expanded="true"] + p{display:block}

/* cta band */
.cta-band{background:var(--navy);border-radius:18px;padding:34px 30px;text-align:center;margin-top:10px}
.cta-band p.ct{margin:0 0 8px;font-size:1.3rem;font-weight:800;color:#fff}
.cta-band p.cs{margin:0 0 18px;color:#c9cde0}

/* footer */
.site-footer{background:var(--navy);border-top:1px solid var(--line);padding:34px 0}
.site-footer .wrap{display:flex;flex-direction:column;gap:14px}
.footer-brand-word{font-weight:800;color:#fff}
.footer-brand-word em{font-style:normal;color:var(--gold)}
.rg-line{font-size:.82rem;color:#9298b5;line-height:1.6;margin:6px 0 0}
.copyright{font-size:.8rem;color:#767b9c;margin:0}
.footer-src{font-size:.8rem;color:#767b9c;margin:0}
.footer-src a{color:#c9a13a;text-decoration:underline}

@media (max-width:820px){
  .hero-grid{grid-template-columns:1fr}
  .content-grid{grid-template-columns:1fr}
  .toc{position:static;border-left:none;border-top:3px solid var(--gold);padding-left:0;padding-top:12px;margin-bottom:10px}
  .toc a{display:inline-block;margin-right:14px;border-bottom:none}
}