:root{--ink:#14213a;--muted:#56657c;--blue:#1d4ed8;--navy:#101f3c;--line:#dbe3ef;--bg:#f2f5fa;--panel:#fff;--orange:#e76b2c;--radius:12px;color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);font-size:100%;line-height:1.75}*{box-sizing:border-box}body{margin:0;background:var(--bg)}a{color:var(--blue);text-underline-offset:4px}button,input,textarea,select{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}button:focus-visible,a:focus-visible,textarea:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #e76b2c;outline-offset:3px}.skip{position:fixed;top:-100px;z-index:20;background:#fff;padding:10px}.skip:focus{top:0}.topbar{height:84px;background:var(--panel);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 40px;gap:24px;position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);font-weight:750;font-size:1.25rem;text-decoration:none}.brand small{font-size:0.875rem;font-weight:500;display:block;line-height:1.1;color:var(--muted)}.brand-icon{display:grid;place-items:center;border-radius:8px;background:var(--blue);color:white;font-size:1.5rem;width:42px;height:42px}.topbar nav{display:flex;gap:28px;align-items:center}.topbar nav a{font-size:0.875rem;text-decoration:none;color:var(--muted)}.topbar nav a:hover{color:var(--blue)}.menu-button{display:none}.shell{max-width:1600px;margin:auto;display:grid;grid-template-columns:272px minmax(0,1fr);min-height:calc(100vh - 84px)}.sidebar{padding:28px 22px;border-right:1px solid var(--line);background:#fff;position:sticky;top:84px;height:calc(100vh - 84px);overflow:auto}.eyebrow{color:var(--blue);font-weight:650;font-size:0.875rem;letter-spacing:.04em;margin:0 0 12px}.module-nav{padding:17px 0;border-bottom:1px solid var(--line)}.module-nav>a{display:block;color:var(--ink);text-decoration:none;font-weight:650;font-size:0.875rem;margin-bottom:8px}.module-nav .lesson-link{display:flex;align-items:flex-start;gap:9px;padding:7px 9px;color:var(--muted);font-size:0.875rem;font-weight:400;border-radius:6px;margin:0}.lesson-link.active{color:var(--blue);background:#edf3ff;font-weight:650}.lesson-link .num{font-variant-numeric:tabular-nums;flex-shrink:0;color:#7d8ba2}.sidebar-foot{padding-top:24px;font-size:0.875rem}.sidebar-foot p{font-size:0.75rem;color:var(--muted)}progress{width:100%;height:7px;accent-color:var(--blue);display:block;margin:10px 0}main{padding:36px 42px;min-width:0}.title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:24px}h1{font-size:clamp(1.5625rem,2.5vw,2.25rem);letter-spacing:-.03em;line-height:1.4;margin:0 0 10px;font-weight:760}h2{font-size:1.375rem;line-height:1.5;margin:0 0 14px}h3{font-size:1.125rem;line-height:1.5;margin:0 0 10px}p{margin:0 0 16px}li{margin-bottom:8px}.muted{color:var(--muted)}.badge{display:inline-block;color:var(--blue);font-size:0.875rem;background:#eaf0ff;border:1px solid #ccdafa;padding:3px 10px;border-radius:5px}.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:24px;align-items:start}.panel{background:white;border:1px solid var(--line);border-radius:var(--radius);padding:28px;margin-bottom:20px}.rail .panel{padding:22px}.rail{position:sticky;top:112px}.rail h3{font-size:1.0rem}.rail p,.rail li{font-size:0.875rem}.section-number{font-size:0.875rem;color:var(--blue);font-weight:700;margin-bottom:8px}.task-panel{border-top:4px solid var(--blue)}.prompt{font-size:1.125rem;font-weight:550}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;background:var(--blue);color:#fff;border:1px solid var(--blue);border-radius:7px;padding:9px 19px;text-decoration:none;font-weight:650;font-size:0.875rem}.button.secondary{background:#fff;color:var(--ink);border-color:var(--line)}.button.soft{background:#eaf0ff;color:var(--blue);border-color:transparent}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.field{display:block;margin:18px 0}.field>span{display:block;font-size:0.875rem;font-weight:650;margin-bottom:7px}textarea,input[type=text],input[type=search],select{width:100%;padding:12px 14px;color:var(--ink);border:1px solid #acbad0;border-radius:7px;background:#fff;line-height:1.65}textarea{min-height:130px;resize:vertical}.confidence{display:flex;gap:12px;flex-wrap:wrap;border:0;padding:0;margin:16px 0}.confidence legend{font-size:0.875rem;font-weight:650;margin-bottom:7px}.confidence label{display:flex;align-items:center;gap:6px;border:1px solid var(--line);padding:7px 12px;border-radius:6px;font-size:0.875rem;cursor:pointer}.confidence label:has(input:checked){background:#edf3ff;border-color:var(--blue)}.flow{display:flex;gap:7px;flex-wrap:wrap;margin:20px 0 26px}.flow span{font-size:0.875rem;border-bottom:3px solid var(--line);padding:6px 10px;color:var(--muted)}.flow span.current{color:var(--blue);border-color:var(--blue);font-weight:700}.example{border-left:3px solid var(--blue);background:#f4f7fd;padding:18px 20px;white-space:pre-wrap;overflow-wrap:anywhere;margin:15px 0}.contrast{background:#fff6ee;border-left:3px solid var(--orange);padding:16px 20px}.callout{background:#eaf0ff;padding:18px 22px;border-radius:8px}.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.module-card{background:white;border:1px solid var(--line);border-radius:12px;padding:24px;text-decoration:none;color:var(--ink)}.module-card:hover{border-color:var(--blue)}.module-card strong{font-size:1.25rem;display:block;margin:6px 0}.module-card p{font-size:0.875rem;color:var(--muted)}.module-card .module-no{color:var(--blue);font-size:0.875rem;font-weight:700}.course-strip{background:var(--navy);border-radius:12px;color:white;padding:25px 28px;display:flex;gap:24px;align-items:center;justify-content:space-between;margin-bottom:24px}.course-strip p{color:#c4d1e8;margin:7px 0 0;font-size:0.875rem}.course-strip h2{color:white;margin:0}.course-strip .button{background:white;color:var(--blue);border-color:white;flex-shrink:0}.compact-list{padding-left:20px}.rubric{display:grid;grid-template-columns:1fr 130px;gap:12px;align-items:center}.rubric select{font-size:0.875rem;padding:8px}.rule{padding:14px 0;border-top:1px solid var(--line)}.meta{font-size:0.875rem;color:var(--muted)}.error{color:#ac291b;background:#fff0ed;padding:10px 14px;border-radius:6px;margin:15px 0}details{border-top:1px solid var(--line);padding-top:15px;margin-top:15px}summary{cursor:pointer;font-weight:650;font-size:0.875rem}table{width:100%;border-collapse:collapse;font-size:0.875rem}td,th{text-align:left;padding:12px;border-bottom:1px solid var(--line);vertical-align:top}th{background:#f4f7fd}.table-wrap{overflow:auto}.review-card{display:flex;gap:18px;align-items:center;justify-content:space-between;padding:20px;background:white;border:1px solid var(--line);border-radius:10px;margin-bottom:12px}.review-card p{margin:6px 0 0;font-size:0.875rem}.catalog{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.case-card{background:white;border:1px solid var(--line);border-radius:10px;padding:18px}.case-card h3{font-size:1.0rem}.case-card p{font-size:0.875rem;color:var(--muted)}.case-card .meta{font-size:0.75rem}.case-tools{display:grid;grid-template-columns:1fr 220px;gap:12px;margin-bottom:20px}#toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--navy);color:white;padding:10px 18px;border-radius:8px;z-index:50;display:none;font-size:0.875rem;max-width:90vw}.storage-note{color:#ac291b}.lesson-footer{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:30px}.finish-mark{font-size:2.875rem;color:var(--blue)}.hidden{display:none!important}code{font-size:.92em;overflow-wrap:anywhere}.lesson-body{max-width:950px}.check-items{padding-left:20px}.empty{padding:30px;border:1px dashed #aabbd6;background:white;border-radius:10px}.no-margin{margin:0}.micro{font-size:0.75rem;color:var(--muted)}
@media(max-width:1180px){.content-grid{grid-template-columns:1fr}.rail{position:static;display:grid;grid-template-columns:1fr 1fr;gap:16px}.shell{grid-template-columns:240px minmax(0,1fr)}main{padding:28px}.topbar{padding:0 24px}.topbar nav{gap:18px}.sidebar{padding:22px 16px}}@media(max-width:780px){.topbar{height:auto;min-height:74px;padding:14px 18px;flex-wrap:wrap;gap:12px}.topbar nav{order:3;width:100%;gap:20px;overflow:auto}.topbar nav a{white-space:nowrap}.menu-button{display:block;background:white;border:1px solid var(--line);border-radius:6px;padding:8px 12px;font-size:0.875rem}.shell{display:block}.sidebar{display:none;position:static;height:auto;border-right:0}.sidebar.open{display:block}main{padding:24px 16px}.panel{padding:22px}.title-row{display:block}.title-row .badge{margin-top:8px}.card-grid,.catalog,.rail{grid-template-columns:1fr}.course-strip{display:block}.course-strip .button{margin-top:18px}.case-tools{grid-template-columns:1fr}.review-card{align-items:flex-start;flex-direction:column}.rubric{grid-template-columns:1fr 105px}h1{font-size:1.6875rem}.brand{font-size:1.125rem}.content-grid{gap:10px}.flow span{padding:5px 6px;font-size:0.75rem}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

.module-card p,.rail p:not(.meta),.rail li,.case-card p:not(.meta),.review-card p{font-size:1rem}