:root{--bg:#07111f;--card:#102238;--line:#294762;--text:#f4f7fb;--muted:#aab9c9;--cyan:#59d6ff;--green:#79e1b6;--amber:#ffd166;--max:1160px}
*{box-sizing:border-box}body{margin:0;font-family:Inter,"Microsoft YaHei",Arial,sans-serif;background:linear-gradient(180deg,#07111f,#081522);color:var(--text);line-height:1.75}
a{color:inherit;text-decoration:none}.wrap{width:min(var(--max),calc(100% - 40px));margin:auto}
nav{position:sticky;top:0;background:rgba(7,17,31,.9);backdrop-filter:blur(14px);border-bottom:1px solid #183149;z-index:10}
.nav{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:25px}.brand{font-weight:800}.brand span{color:var(--cyan)}
.links{display:flex;gap:20px;flex-wrap:wrap;color:var(--muted);font-size:14px}.links a:hover{color:white}.links a.active{color:var(--cyan)}
.hero{padding:105px 0 80px}.eyebrow{display:inline-block;padding:6px 12px;border:1px solid #2b6078;border-radius:999px;color:var(--cyan);font-size:13px}
h1{font-size:clamp(42px,7vw,78px);line-height:1.08;margin:22px 0;letter-spacing:-2px}h2{font-size:clamp(28px,4vw,46px);line-height:1.2;margin:0 0 18px}h3{margin:0 0 10px}
.lead{font-size:clamp(18px,2.2vw,24px);max-width:880px;color:#dce6f0}.muted{color:var(--muted)}
.actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}.btn{padding:12px 19px;border-radius:10px;border:1px solid var(--line);font-weight:700;display:inline-block}.btn.primary{background:linear-gradient(135deg,var(--cyan),var(--green));color:#04111b;border:0}
.filemeta{display:block;margin-top:6px;font-size:12px;font-weight:400;opacity:.75}
.section{padding:76px 0}.alt{background:rgba(255,255,255,.025);border-top:1px solid rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.06)}
.kicker{color:var(--green);font-weight:800;font-size:13px;letter-spacing:.09em;text-transform:uppercase}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:30px}.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:30px}.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:30px}
.card{padding:25px;border:1px solid rgba(255,255,255,.09);border-radius:18px;background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.02))}
.num{width:42px;height:42px;display:grid;place-items:center;background:rgba(89,214,255,.12);color:var(--cyan);border-radius:12px;font-weight:800;margin-bottom:16px}
.quote{padding:34px;border-left:4px solid var(--cyan);background:rgba(89,214,255,.06);border-radius:0 16px 16px 0;font-size:clamp(26px,4vw,44px);font-weight:800;line-height:1.3}
.flow{display:flex;gap:14px;align-items:center;justify-content:center;flex-wrap:wrap;margin:30px 0}.box{padding:16px 20px;border:1px solid var(--line);border-radius:13px;background:var(--card);font-weight:800}.arrow{color:var(--cyan);font-size:24px}
.notice{padding:18px 20px;border:1px solid #6f6030;background:rgba(255,209,102,.08);border-radius:14px;color:#ffe4a3}.list{padding-left:20px}
.footer{padding:42px 0;color:var(--muted);border-top:1px solid rgba(255,255,255,.08);font-size:14px}

/* comparison table (2-column, right column = NucleoScope highlighted) */
.cmp{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:26px}
.cmp .card h4{margin:0 0 14px;font-size:19px;color:var(--muted)}
.cmp .card.nucleo{border-color:rgba(89,214,255,.35);background:linear-gradient(180deg,rgba(89,214,255,.09),rgba(89,214,255,.02))}
.cmp .card.nucleo h4{color:var(--cyan)}
.cmp ul{list-style:none;margin:0;padding:0}
.cmp ul li{padding:9px 0;border-bottom:1px solid rgba(255,255,255,.07);font-size:15px}
.cmp ul li:last-child{border-bottom:0}
.cmp ul li b{display:block;font-size:12px;color:var(--muted);font-weight:600;margin-bottom:2px}

/* dark code / measurement-chain block */
.code{background:#040d18;border:1px solid var(--line);border-radius:14px;padding:22px 24px;font-family:Consolas,Monaco,monospace;font-size:16px;color:var(--green);white-space:pre-wrap;overflow-x:auto;margin-top:22px}

/* known-boundary / caution callout (amber) vs neutral info callout (cyan) */
.boundary{padding:20px 22px;border:1px solid #6f6030;background:rgba(255,209,102,.07);border-radius:0 16px 16px 0;border-left:4px solid var(--amber);margin-top:26px}
.boundary b{color:var(--amber)}
.info{padding:20px 22px;border-left:4px solid var(--cyan);background:rgba(89,214,255,.06);border-radius:0 16px 16px 0;margin-top:26px}
.info b{color:var(--cyan)}

.card.closed{border-top:3px solid var(--green)}
.card.runaway{border-top:3px solid #ff6b6b}

/* FAQ */
.faq{margin-top:26px}
.faq .q{padding:22px 0;border-bottom:1px solid rgba(255,255,255,.08)}
.faq .q h4{margin:0 0 10px;font-size:19px;color:var(--cyan)}
.faq .q p{margin:0;color:#dce6f0}

@media(max-width:800px){.nav{align-items:flex-start;flex-direction:column;padding:15px 0}.grid3,.grid2,.grid4,.cmp{grid-template-columns:1fr}.hero{padding-top:72px}}