:root{--navy:#071831;--blue:#2563eb;--sky:#eaf2ff;--ink:#122033;--muted:#64748b;--line:#dbe5f2;--cream:#fffaf0;--green:#16a34a;--red:#dc2626}*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Arial,sans-serif;color:var(--ink);background:#f8fbff;line-height:1.55}.wrap{width:min(1120px,92vw);margin:auto}.nav{padding:18px 0;background:white;border-bottom:1px solid var(--line)}.nav .wrap{display:flex;justify-content:space-between;gap:16px;align-items:center}.brand{font-weight:850;color:var(--navy);text-decoration:none}.pill{display:inline-flex;gap:8px;align-items:center;border:1px solid #bad1ff;background:#eff6ff;color:#1d4ed8;border-radius:999px;padding:7px 12px;font-weight:750;font-size:.82rem}.hero{padding:64px 0 44px;background:linear-gradient(135deg,#071831 0%,#123263 62%,#2563eb 100%);color:white}.grid{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center}.hero h1{font-size:clamp(2.35rem,5.5vw,4.7rem);line-height:.95;margin:16px 0}.hero p{font-size:1.14rem;color:#dbeafe;max-width:720px}.disclosure{background:#fff7ed;color:#7c2d12;border:1px solid #fed7aa;border-radius:16px;padding:12px 14px;font-size:.92rem}.card{background:white;border:1px solid var(--line);border-radius:24px;box-shadow:0 18px 55px rgba(15,23,42,.10);padding:24px}.hero .card{color:var(--ink)}.form label{display:block;font-weight:750;margin:12px 0 6px}.form input{width:100%;border:1px solid #bfd0e6;border-radius:12px;padding:13px 14px;font-size:1rem}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:13px 20px;font-weight:850;text-decoration:none;border:0;cursor:pointer}.btn-primary{background:#f97316;color:white;width:100%;font-size:1rem}.btn-dark{background:var(--navy);color:white}.btn-light{background:white;color:var(--navy)}.btn-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}.micro{font-size:.86rem;color:var(--muted)}section{padding:54px 0}.section-title{font-size:clamp(1.8rem,3vw,2.8rem);line-height:1.05;margin:0 0 12px;color:var(--navy)}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.lesson{padding:20px;border-radius:20px;background:white;border:1px solid var(--line)}.lesson b{color:#1d4ed8}.check{display:grid;gap:12px}.check div{display:flex;gap:10px;align-items:flex-start;background:white;border:1px solid var(--line);border-radius:14px;padding:13px}.num{background:#dbeafe;color:#1d4ed8;font-weight:900;border-radius:999px;width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;flex:0 0 28px}.split{display:grid;grid-template-columns:1fr 1fr;gap:24px}.diagram{background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px}.flow{display:grid;gap:10px}.flow span{display:block;background:#eff6ff;border:1px solid #bfdbfe;border-radius:14px;padding:13px;font-weight:800}.footer{padding:32px 0;background:#071831;color:#cbd5e1}.footer a{color:white;margin-right:14px}.video-box{aspect-ratio:16/9;background:linear-gradient(135deg,#0f172a,#2563eb);border-radius:22px;color:white;display:flex;align-items:center;justify-content:center;text-align:center;padding:26px}.script{white-space:pre-wrap;background:#0f172a;color:#e5e7eb;border-radius:16px;padding:18px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92rem}.download-list a{display:block;background:white;border:1px solid var(--line);padding:16px;border-radius:14px;text-decoration:none;color:var(--navy);font-weight:850;margin:10px 0}@media(max-width:840px){.grid,.split{grid-template-columns:1fr}.cards{grid-template-columns:1fr}.hero{padding-top:40px}.nav .wrap{align-items:flex-start;flex-direction:column}}