:root{--blue:#0076e9;--action:#005fbc;--ink:#10243e;--muted:#465b72;--soft:#eef6ff;--surface:#f6f9fd;--line:#dce6f1;--white:#fff;--green:#176b49;--radius:22px;font:16px/1.55 Inter,Arial,sans-serif;color:var(--ink);background:var(--surface)}
*{box-sizing:border-box}body{margin:0}a{color:var(--action)}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}img{display:block;max-width:100%}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.15;letter-spacing:-.025em}h1{font-size:clamp(2.25rem,4.25vw,4.4rem)}h2{font-size:clamp(1.55rem,2.65vw,2.65rem)}h3{font-size:1.23rem}p+ p{margin-top:.8em}:focus-visible{outline:3px solid var(--blue);outline-offset:4px}html{scroll-behavior:smooth}.skip{position:absolute;left:10px;top:-100px;z-index:5;background:white;padding:12px}.skip:focus{top:12px}
.wrap{max-width:1280px;width:calc(100% - 88px);margin-inline:auto}.top{background:#fff;border-bottom:1px solid var(--line)}.top-inner{min-height:86px;display:flex;align-items:center;justify-content:space-between;gap:26px}.brand img,.brand-logo,.foot img{width:160px;height:50px;object-fit:contain;object-position:left center}.top nav{display:flex;gap:25px;flex-wrap:wrap;align-items:center}.top nav a{color:var(--ink);text-decoration:none;font-size:.93rem;font-weight:700;white-space:nowrap}.top nav a:hover,.top nav a[aria-current]{color:var(--action)}.main{min-height:55vh;padding-block:40px 68px}.loading{padding:35px}.quiet,.primary,.secondary,.pill{display:inline-flex;align-items:center;justify-content:center;gap:9px;border-radius:10px;border:1px solid var(--line);text-decoration:none;font-weight:700;line-height:1.2;padding:12px 17px;color:var(--ink);background:white}.primary{background:var(--action);border-color:var(--action);color:white}.primary:hover{background:#004e9a}.quiet:hover,.secondary:hover{border-color:var(--blue);color:var(--action)}.exit{padding:9px 12px;font-size:.9rem}.kicker{font-size:.75rem;font-weight:800;text-transform:uppercase;letter-spacing:.13em;color:var(--action);margin-bottom:12px}.hero{overflow:hidden;border:1px solid var(--line);background:white;border-radius:var(--radius);display:grid;grid-template-columns:1.03fr 1fr;min-height:430px}.hero-media{min-width:0;background:#f7faff;display:grid;align-items:center}.hero-media img{width:100%;height:100%;object-fit:cover;object-position:47% center}.hero-copy{padding:clamp(26px,4vw,57px);display:flex;flex-direction:column;justify-content:center;align-items:flex-start}.hero-copy h1{font-size:clamp(2rem,3.6vw,3.55rem)}.hero-copy p:not(.kicker){color:var(--muted);margin-top:14px;max-width:45ch}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:23px}.facts{display:flex;gap:12px;flex-wrap:wrap;margin-top:19px}.pill{font-size:.78rem;padding:6px 10px;background:var(--soft);border:0;color:var(--action);white-space:nowrap}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin:49px 0 21px}.section-head p:not(.kicker){color:var(--muted);margin-top:8px}.progress{min-width:175px;color:var(--muted);font-size:.84rem}.progress progress{display:block;width:100%;height:9px;margin-top:7px;accent-color:var(--blue)}.catalog{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:19px}.card{background:white;border:1px solid var(--line);border-radius:18px;overflow:hidden;display:flex;flex-direction:column;min-width:0}.card:hover{border-color:#96bfed}.card-art{display:block;position:relative;background:#fff;border-bottom:1px solid var(--line)}.card-art img{width:100%;height:auto;aspect-ratio:1.5;object-fit:contain}.card-copy{padding:18px 20px;display:flex;flex:1;flex-direction:column;align-items:start}.card-copy h3{margin:5px 0 9px;font-size:1.35rem}.card-copy p{color:var(--muted);font-size:.95rem;margin-bottom:17px}.card-copy .card-link{font-weight:800;text-decoration:none;margin-top:auto}.card-num{font-size:.76rem;letter-spacing:.12em;font-weight:800;color:var(--action)}.callout{margin-top:30px;background:var(--soft);border:1px solid #d4e8fe;padding:23px 28px;border-radius:17px;display:flex;align-items:center;justify-content:space-between;gap:20px}.callout p{margin-top:6px;color:var(--muted)}
.crumb{display:flex;flex-wrap:wrap;gap:9px;color:var(--muted);font-size:.9rem;margin-bottom:18px}.crumb a{text-decoration:none}.topic-head{display:grid;grid-template-columns:1.6fr .85fr;align-items:center;gap:20px;background:white;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-bottom:24px}.topic-copy{padding:30px 35px}.topic-copy h1,.page-head h1{font-size:clamp(2rem,4.1vw,3.45rem)}.topic-copy p:not(.kicker),.page-head p:not(.kicker){max-width:62ch;margin-top:11px;color:var(--muted)}.topic-head img{width:100%;max-height:230px;object-fit:contain}.tabs{display:flex;gap:5px;overflow:auto;background:#eaf2fc;padding:5px;border-radius:13px;margin:0 0 19px}.tabs a{padding:10px 15px;flex:1;text-align:center;white-space:nowrap;text-decoration:none;color:var(--ink);font-weight:750;font-size:.91rem;border-radius:9px}.tabs a[aria-current]{background:white;color:var(--action);box-shadow:0 1px 5px #163a5d16}.panel{padding:28px clamp(18px,4vw,45px);background:white;border:1px solid var(--line);border-radius:18px;min-width:0}.reader{display:grid;grid-template-columns:minmax(0,1fr) minmax(170px,225px);align-items:start;gap:32px}.article{max-width:820px;min-width:0}.article h2{font-size:1.53rem;margin:1.45em 0 .55em}.article h3{margin:1.35em 0 .55em}.article p,.article ol,.article ul{margin:.8em 0}.article blockquote{margin:14px 0;background:var(--soft);border-left:4px solid var(--blue);padding:12px 16px}.article li{margin:.28em 0}.article h2[id],.article h3[id]{scroll-margin-top:20px}.chapter-list{position:sticky;top:20px;border-left:1px solid var(--line);padding-left:18px;font-size:.86rem}.chapter-list a{display:block;margin-top:9px;text-decoration:none}.table-wrap{overflow-x:auto;margin:16px 0}.article table{border-collapse:collapse;min-width:390px;width:100%;font-size:.87rem}.article th,.article td{border:1px solid var(--line);padding:9px;text-align:left;vertical-align:top}.article th{background:var(--soft)}.lesson-bottom{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-top:21px}.page-head{margin:8px 0 25px}
.deck{padding:0;overflow:hidden}.slide{min-height:340px;aspect-ratio:16/8.6;padding:clamp(24px,5vw,68px);background:linear-gradient(125deg,#fff,#f2f8ff);display:flex;flex-direction:column;justify-content:center;position:relative;border-left:6px solid var(--blue)}.slide h2{max-width:21ch;font-size:clamp(1.55rem,4vw,3.25rem)}.slide ul{font-size:clamp(1rem,1.75vw,1.25rem);max-width:69ch;line-height:1.44;padding-left:1.2em}.slide li{margin:.45em 0}.slide-number{position:absolute;right:22px;bottom:20px;color:var(--muted);font-weight:700}.deck-controls{padding:13px 18px;display:flex;justify-content:space-between;align-items:center;gap:9px;flex-wrap:wrap}.deck-controls .arrows{display:flex;align-items:center;gap:8px}.all-slides .slide+ .slide{border-top:1px solid var(--line)}
.quiz{margin-top:35px;padding-top:25px;border-top:1px solid var(--line)}.quiz p{color:var(--muted);margin:8px 0}.quiz fieldset{border:1px solid var(--line);border-radius:13px;margin:17px 0;padding:12px 16px}.quiz legend{font-weight:800;padding:0 5px;line-height:1.35}.choice{display:flex;gap:9px;align-items:baseline;padding:6px 0}.choice input{accent-color:var(--action)}.result{padding:12px 14px;background:var(--soft);border-radius:10px;margin-top:16px}.feedback{font-size:.9rem;color:var(--action);margin-top:6px}.file-list{display:grid;gap:10px;margin-top:15px}.file{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 14px;border:1px solid var(--line);border-radius:12px}.file small{display:block;color:var(--muted)}.page-tabs{margin-bottom:16px}.case-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.case-bar a[aria-current]{border-color:var(--blue);color:var(--action);background:var(--soft)}details{border:1px solid var(--line);border-radius:11px;padding:11px 13px;margin:9px 0}summary{font-weight:700;cursor:pointer}pre{font: .87rem/1.55 ui-monospace,Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere;color:var(--ink);background:var(--surface);padding:14px;border-radius:8px}details .quiet{font-size:.85rem;margin:10px 0 0}.status{font-size:.84rem;margin-left:8px;color:var(--green)}
footer{border-top:1px solid var(--line);background:white}.foot{padding-block:27px;display:grid;grid-template-columns:1fr 1.5fr 1fr;gap:22px;color:var(--muted);font-size:.88rem}.foot img{width:120px;height:43px}.foot p{margin-top:6px}.foot strong{color:var(--ink)}.gate-mark{color:var(--action);font-weight:800;letter-spacing:.13em;font-size:.77rem}.gate-main{padding-block:clamp(28px,7vh,75px)}.gate-card{display:grid;grid-template-columns:1fr .83fr;background:white;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius)}.gate-image{display:grid;align-items:center;background:#f8fbff}.gate-image img{width:100%;object-fit:cover;height:100%}.gate-form{padding:clamp(25px,4vw,54px)}.gate-form h1{font-size:clamp(1.9rem,3.45vw,3.35rem)}.gate-form p:not(.kicker){margin:14px 0;color:var(--muted)}.gate-form form{display:grid;gap:9px;margin-top:21px}.gate-form label{font-weight:750}.gate-form input{padding:11px;border:1px solid #9bb2ca;border-radius:9px;width:100%;max-width:335px}.gate-form button{justify-self:start;margin-top:5px}.gate-form .alert{color:#a32525;background:#fff2f2;padding:8px 11px;border-radius:9px}.gate-footer{padding-block:20px;color:var(--muted);font-size:.9rem}
@media(max-width:900px){.wrap{width:calc(100% - 40px)}.catalog{grid-template-columns:repeat(2,minmax(0,1fr))}.top nav{gap:13px}.hero{min-height:0}.hero-copy{padding:23px}.reader{grid-template-columns:1fr}.chapter-list{position:static;order:-1}.foot{grid-template-columns:1fr 1fr}.foot>div:last-child{grid-column:1/-1}}
@media(max-width:610px){.wrap{width:calc(100% - 28px)}.top-inner{flex-wrap:wrap;gap:8px 14px;padding:9px 0}.top nav{order:3;overflow:auto;flex-wrap:nowrap;width:100%;padding-bottom:3px}.brand img,.brand-logo{width:125px;height:40px}.main{padding-block:21px 42px}.hero,.gate-card,.topic-head{grid-template-columns:1fr}.hero-media img,.gate-image img{height:auto;max-height:250px;object-fit:contain}.topic-head img{max-height:155px;order:-1}.topic-copy{padding:0 19px 21px}.hero-copy{padding:20px}.catalog{grid-template-columns:1fr}.section-head{align-items:start;flex-direction:column;margin-top:30px}.callout,.file{align-items:start;flex-direction:column}.slide{aspect-ratio:auto;min-height:325px;padding:21px}.foot{grid-template-columns:1fr}.foot>div:last-child{grid-column:auto}.gate-form{padding:20px}.gate-mark{font-size:.65rem}}
@media print{.top,footer,.tabs,.crumb,.topic-head,.lesson-bottom,.deck-controls,.skip{display:none!important}.wrap,.main{width:auto;padding:0;margin:0}.deck{border:0}.slide{break-after:page;min-height:0;aspect-ratio:16/9}.slide:last-child{break-after:auto}}