:root{--paper:#faf7f0;--ink:#153e30;--muted:#72796d;--gold:#a9763f;--line:#e2ddcf;--serif:'Jiyi Serif','Noto Serif CJK SC','Songti SC',STSong,SimSun,serif}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;background:var(--paper);color:var(--ink);font:14px/1.85 'Jiyi Sans','Microsoft YaHei','PingFang SC',sans-serif}a{color:inherit;text-decoration:none}button,textarea,input{font:inherit}button{cursor:pointer}button:disabled{opacity:.4;cursor:not-allowed}button:focus-visible,a:focus-visible,textarea:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid #ba874c;outline-offset:4px}a,button{-webkit-tap-highlight-color:transparent}.wrap{width:min(1280px,calc(100% - 96px));margin:auto}.header{border-bottom:1px solid var(--line)}.nav{height:88px;display:flex;align-items:center;gap:28px}.brand{font:700 29px var(--serif);letter-spacing:3px;display:flex;align-items:center;gap:12px}.arch{display:block;width:26px;height:35px;border:2px solid var(--ink);border-radius:18px 18px 0 0;box-shadow:inset 0 0 0 4px var(--paper)}.nav-caption{font-size:12px;color:var(--muted);border-left:1px solid var(--line);padding-left:26px}.back{margin-left:auto;font-size:12px}.intro{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center;padding:52px 0 38px}.eyebrow{font-size:10px;letter-spacing:2px;color:var(--gold)}h1{font:600 40px/1.45 var(--serif);margin:12px 0 14px}h2{font:600 27px/1.5 var(--serif)}.intro p{color:var(--muted);margin:0}.question{border-left:2px solid #c7b18d;padding:5px 0 5px 26px}.question h2{font-size:23px;margin:8px 0}.question p{font-size:12px}.question details{margin-top:12px}.question details p{padding:12px 0 0}.question summary{font-size:12px}.small{font-size:11px!important;color:var(--muted)}summary{cursor:pointer;color:var(--gold)}.workspace{background:#fffcf7;border:1px solid var(--line);border-radius:12px;overflow:hidden}.steps{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line);background:#f2f0e7}.step{padding:20px 12px;border:0;border-bottom:3px solid transparent;background:transparent;color:var(--muted);font-size:13px}.step span{font:italic 17px var(--serif);color:#9aab91;margin-right:10px}.step[aria-selected=true]{color:var(--ink);border-bottom-color:var(--ink);background:#fffdf7}.study-grid{display:grid;grid-template-columns:1.2fr 1fr;min-height:470px}.place-panel{padding:28px;border-right:1px solid var(--line)}.scene-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.scene-head b{font:600 20px var(--serif)}.scene-head span{font-size:10px;color:var(--muted)}.scene-image{position:relative;border-radius:7px;isolation:isolate;background:#ded1b8}.scene-image img{width:100%;height:auto;display:block;border-radius:7px}.route-line{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;filter:drop-shadow(0 1px 2px #44361d)}.spot{position:absolute;width:32px;height:32px;padding:0;border:1px solid #fff8df;background:#faf6e8;color:var(--ink);border-radius:50%;font-size:13px;box-shadow:0 2px 12px #193b3050;transform:translate(-50%,-50%);z-index:1}.spot span{position:absolute;bottom:37px;left:50%;transform:translateX(-50%);font-size:10px;padding:2px 7px;background:#fff9e9ed;border-radius:4px;white-space:nowrap;pointer-events:none}.spot[aria-pressed=true]{background:var(--ink);color:#fff;outline:4px solid #fffbdf85}.door{left:42%;top:47%}.cabinet{left:37%;top:68%}.mirror{left:98.2%;top:39%}.mirror span{left:auto;right:0;transform:none}.place-tabs{display:flex;align-items:center;justify-content:space-between;gap:6px;margin-top:18px}.place-tabs button{background:transparent;color:var(--muted);border:1px solid transparent;border-radius:5px;padding:7px 10px;font-size:12px}.place-tabs button span{font-size:10px;color:#a28a67;margin-right:7px}.place-tabs button[aria-pressed=true]{border-color:#c2ccb7;background:#edf0e5;color:var(--ink)}.place-tabs i{font-style:normal;color:#b6ac96;font-size:12px}.scene-note{font-size:11px;color:var(--muted);margin:18px 0 0}.lesson{padding:32px 34px;align-self:start}.lesson .eyebrow{font-size:10px}.lesson h2{font-size:25px;margin:10px 0 16px}.lesson p{font-size:13px;color:var(--muted)}.thought{background:#f1eee3;border-radius:7px;padding:20px 22px;margin:20px 0;color:#4b5a47;font-size:14px;line-height:2}.thought b{display:block;color:var(--gold);font-size:11px;font-weight:500;margin-bottom:7px;letter-spacing:1px}.answer{border-left:2px solid #b18b52;padding:5px 0 5px 17px;margin:20px 0}.answer small{display:block;color:var(--muted);font-size:11px}.answer strong{font-size:16px;font-weight:500}.lesson details{margin-top:18px}.lesson details p{padding:10px 0}.helper{font-size:11px!important;line-height:1.85}.button{display:inline-flex;align-items:center;justify-content:center;padding:11px 22px;background:var(--ink);border:1px solid var(--ink);border-radius:26px;color:#fffaf0;font-size:12px;min-height:44px}.button.secondary{background:transparent;color:var(--ink);border-color:#c4ccbd}.controls{border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:20px 28px;gap:16px}.controls>span{font-size:11px;color:var(--muted)}.study-grid.independent{display:block}.independent .lesson{max-width:800px;margin:auto;padding:32px 34px}.response{display:block;width:100%;min-height:145px;background:#fffdf7;border:1px solid #c3cbb9;border-radius:7px;color:var(--ink);padding:17px;resize:vertical;margin:10px 0 20px;font-size:14px;line-height:1.9}.checklist{display:grid;gap:9px;margin-top:16px}.checklist label{display:flex;align-items:start;gap:10px;font-size:13px}.checklist input{accent-color:var(--ink);margin-top:6px;width:16px;height:16px;flex-shrink:0}.feedback{background:#eef0e5;padding:13px 16px;font-size:12px;margin-top:20px}.principles{display:grid;grid-template-columns:1fr 1fr;gap:70px;padding:55px 0}.principles h2{font-size:27px;margin:10px 0}.principles p{align-self:center;color:var(--muted);font-size:13px}.footer{display:flex;justify-content:space-between;gap:20px;padding:24px 0;border-top:1px solid var(--line);color:var(--muted);font-size:10px}.locus-progress{font-size:11px;color:var(--gold)}.question[hidden]{display:none!important}@media(max-width:1000px){.wrap{width:calc(100% - 56px)}.intro{gap:35px}.study-grid{grid-template-columns:1fr 1fr}.place-panel{padding:23px}.lesson{padding:25px}.place-tabs button{padding:7px 5px;font-size:11px}.place-tabs button span{margin-right:3px}.spot{width:29px;height:29px}.place-tabs{gap:2px}}@media(max-width:700px){.wrap{width:calc(100% - 36px)}.nav{height:74px;gap:12px}.brand{font-size:25px}.arch{width:22px;height:30px}.nav-caption{display:none}.back{font-size:11px}.intro{grid-template-columns:1fr;gap:25px;padding:32px 0 28px}h1{font-size:32px}.intro>div>p{font-size:13px}.question{padding-left:17px}.question h2{font-size:20px}.step{padding:15px 3px;font-size:11px}.step span{display:block;font-size:16px;margin:0 0 3px}.study-grid{grid-template-columns:1fr;min-height:0}.place-panel{border-right:0;border-bottom:1px solid var(--line);padding:22px}.scene-note br{display:none}.scene-note{margin-top:12px}.place-tabs button{padding:7px 9px}.lesson{padding:25px 22px}.lesson h2{font-size:23px}.thought{padding:17px}.controls{padding:18px;flex-wrap:wrap;gap:10px}.controls>span{order:-1;width:100%;text-align:center}.controls .button{font-size:11px;padding:10px 14px}.independent .lesson{padding:25px 22px}.principles{grid-template-columns:1fr;gap:6px;padding:35px 0}.principles h2{font-size:25px}.footer{flex-direction:column;gap:5px;padding:22px 0}.spot{width:28px;height:28px}.spot span{font-size:9px;bottom:33px}}@media(max-width:360px){.wrap{width:calc(100% - 24px)}.place-panel{padding:18px}.place-tabs button{padding:6px 4px}.controls{padding:14px}.controls .button{padding:10px}.lesson{padding:22px 18px}.intro h1{font-size:29px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
