@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Manrope:wght@500;600;700;800&family=Noto+Sans+SC:wght@400;500;700;900&display=swap');
:root{--ink:#16243b;--muted:#69788d;--line:#dce4ed;--paper:#fff;--wash:#f5f8fb;--blue:#2256c9;--orange:#ef7d3c}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f7f9fc;color:var(--ink);font:18px/1.9 Manrope,'Noto Sans SC',sans-serif}header{height:72px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}.topbar{max-width:1240px;height:100%;margin:auto;padding:0 32px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:800}.brand b{display:grid;place-items:center;width:37px;height:37px;background:var(--blue);color:#fff;border-radius:4px;font:700 14px 'DM Mono',monospace}.tag,.eyebrow,.chapter-title small,footer{font:500 12px 'DM Mono',monospace;color:var(--blue);letter-spacing:.02em}.layout{max-width:1240px;margin:auto;padding:0 32px;display:grid;grid-template-columns:205px minmax(0,850px);gap:70px}.layout aside{position:sticky;top:72px;height:calc(100vh - 72px);padding-top:52px}.aside-title{font-weight:800;font-size:14px;margin-bottom:18px}.layout nav{display:grid;gap:3px}.layout nav a{color:var(--muted);font-size:14px;text-decoration:none;padding:8px 0;border-bottom:1px solid transparent}.layout nav a:hover,.layout nav a.active{color:var(--blue);border-color:var(--blue)}main{background:var(--paper);min-height:100vh}.hero{padding:78px 58px 56px;border-bottom:1px solid var(--line)}.eyebrow{margin:0 0 15px}.hero h1{font-size:clamp(48px,6vw,76px);line-height:1.15;letter-spacing:0;margin:0 0 22px;font-weight:900}.hero h1:after{content:'';display:block;width:76px;height:6px;background:var(--orange);margin-top:19px}.lead{max-width:640px;font-size:20px;color:var(--muted);margin:0}.contact{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:34px 0 20px}.contact div{background:var(--wash);border-top:3px solid var(--blue);padding:12px 15px}.contact small{display:block;color:var(--muted);font-size:13px}.contact strong{font-size:18px}.qr{width:min(100%,350px);margin:21px 0;padding:13px;background:var(--wash);border:1px solid var(--line)}.qr img{display:block;width:100%;cursor:zoom-in}.qr figcaption{font:500 12px 'DM Mono',monospace;color:var(--muted);padding-top:7px}.register{display:grid;gap:2px;background:#fff7ee;border-left:4px solid var(--orange);padding:13px 17px;max-width:610px}.register span{font-size:15px;color:var(--muted)}.register a{color:#a34d19;font-weight:800;text-decoration:none}.register b{font-size:15px}.chapter{padding:62px 58px;border-bottom:1px solid var(--line);scroll-margin-top:90px}.chapter-title{display:flex;gap:17px;align-items:flex-start;margin-bottom:28px}.chapter-title>span{display:grid;place-items:center;background:var(--blue);color:#fff;width:36px;height:36px;border-radius:4px;font:500 13px 'DM Mono',monospace}.chapter-title small{display:block;margin:0 0 3px}.chapter h2{font-size:32px;line-height:1.35;margin:0;font-weight:900}.chapter p{margin:13px 0;color:#43546b}.visual-list{display:grid;gap:18px;width:100%;max-width:100%;overflow:hidden;margin:20px 0 28px}.visual-list img{display:block;width:100%;max-width:100%;height:auto;object-fit:contain;border:1px solid var(--line);padding:10px;background:#fff;cursor:zoom-in}.instruction{display:flex;gap:10px;align-items:center;margin:23px 0 16px;padding:12px 15px;background:var(--wash);border-left:4px solid var(--blue);color:#43546b}.instruction span{font-size:12px;color:var(--blue);font-weight:800;white-space:nowrap}.wide-img{display:block;width:100%;height:auto;max-height:820px;object-fit:contain;background:#fff;border:1px solid var(--line);padding:10px;margin:17px 0 25px;cursor:zoom-in}footer{padding:28px 58px 65px;color:var(--muted)}.overlay{position:fixed;inset:0;z-index:20;background:rgba(12,21,36,.94);display:grid;place-items:center;padding:24px;cursor:zoom-out}.overlay img{max-width:96vw;max-height:94vh;object-fit:contain;background:#fff}@media(max-width:900px){.layout{display:block;padding:0 18px}.layout aside{position:static;height:auto;padding:18px 0 12px;border-bottom:1px solid var(--line)}.layout nav{display:flex;overflow:auto;gap:15px}.layout nav a{white-space:nowrap}.hero,.chapter{padding-left:0;padding-right:0}.hero{padding-top:52px}.chapter{padding-top:48px}.topbar{padding:0 18px}.tag{display:none}}@media(max-width:560px){body{font-size:17px}.hero h1{font-size:51px}.lead{font-size:18px}.contact{grid-template-columns:1fr}.chapter h2{font-size:27px}.instruction{display:block}.instruction span{display:block;margin-bottom:3px}.wide-img{padding:6px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}