/* 校园搭子图鉴：原有纸本插画与 HTML / SVG 路线，不新增字体或大图。 */
.lab-page{--lab-rust:#a45a38;--lab-olive:#68714f;}
.lab-nav-links{display:flex;gap:22px;font-size:13px;}
.lab-nav-links a{min-height:44px;display:inline-flex;align-items:center;}
.lab-intro{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:30px 54px;align-items:center;}
.lab-intro h1{font-size:clamp(35px,5vw,58px);line-height:1.25;margin:12px 0 22px;}
.lab-draft{border-left:3px solid var(--lab-olive);padding-left:14px;font-size:12px;color:var(--muted);max-width:42em;margin:22px 0 0;}
.lab-draft b{display:block;color:var(--ink);margin-bottom:5px;}
.lab-cover{margin:0;border:1px solid var(--line);padding:20px;background:#f4f0e2;}
.lab-cover>p{font-size:10px;letter-spacing:.1em;margin:0;}
.lab-cover img{display:block;width:100%;height:auto;aspect-ratio:1;}
.lab-cover figcaption{font-size:12px;color:var(--muted);}
.lab-cover figcaption span{display:block;color:var(--ink);margin-bottom:5px;}
.lab-entry-steps{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;border-top:1px solid var(--ink);border-bottom:1px solid var(--line);padding:20px 0;font-size:13px;}
.lab-entry-steps b{display:inline-block;margin-right:14px;color:var(--lab-rust);font-size:11px;}
.lab-boundary{grid-column:1/-1;font-size:13px;}
.lab-boundary code,.lab-result-boundary code{overflow-wrap:anywhere;}
.lab-quiz{max-width:820px;margin:auto;}
.lab-route{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:20px;}
.lab-route button{display:grid;grid-template-columns:28px 1fr auto;align-items:center;gap:8px;background:transparent;border:0;border-bottom:2px solid var(--line);padding:12px 0;font:inherit;color:var(--muted);min-height:55px;cursor:pointer;min-width:0;}
.lab-route b{font-size:12px;color:var(--lab-rust);}
.lab-route span{font-size:13px;text-align:left;}
.lab-route small{font-size:11px;}
.lab-route [aria-current]{border-bottom-color:var(--ink);color:var(--ink);}
.lab-tools{display:flex;justify-content:flex-end;gap:14px;margin:10px 0;}
.lab-text-button{border:0;background:transparent;font:inherit;font-size:12px;min-height:44px;cursor:pointer;color:var(--muted);padding:6px;text-decoration:underline;text-underline-offset:4px;}
.lab-text-link{display:inline-flex;align-items:center;min-height:44px;font-size:13px;text-decoration:underline;text-underline-offset:4px;}
.lab-question fieldset{border:0;padding:0;margin:0;min-width:0;}
.lab-question-number{font-size:12px;color:var(--lab-rust);margin:16px 0 12px;}
.lab-question h2{font-size:clamp(24px,3vw,33px);line-height:1.5;margin:0 0 24px;max-width:23em;}
.lab-question h2:focus,.lab-rest h2:focus,.lab-result-head h1:focus,.lab-detail h3:focus,.lab-intro h1:focus{outline:none;}
.lab-endpoints{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;margin-bottom:25px;}
.lab-endpoints>div{border-top:1px solid var(--line);padding-top:16px;}
.lab-endpoints span{font-size:11px;color:var(--muted);}
.lab-endpoints p{font-size:16px;line-height:1.8;margin:8px 0 0;}
.lab-options{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;}
.lab-choice{display:flex;align-items:center;flex-direction:column;gap:12px;min-height:105px;padding:12px 3px;cursor:pointer;border:1px solid var(--line);position:relative;text-align:center;justify-content:center;font-size:12px;}
.lab-choice input{position:absolute;width:1px;height:1px;opacity:0;}
.lab-choice-symbol{display:grid;place-items:center;width:35px;height:35px;border:1px solid var(--muted);border-radius:50%;font-size:12px;}
.lab-choice.is-selected{background:var(--ds-accent);border-color:var(--ink);}
.lab-choice.is-selected .lab-choice-symbol{background:var(--ink);border-color:var(--ink);color:var(--paper);}
.lab-choice:focus-within{outline:2px solid var(--ink);outline-offset:3px;}
.lab-answer-note{line-height:1.8;}
.lab-rest{text-align:center;max-width:600px;margin:45px auto;min-height:340px;}
.lab-rest h2{font-size:clamp(25px,4vw,35px);margin:24px 0 16px;}
.lab-rest>p:not(.ds-kicker){font-size:14px;color:var(--muted);margin-bottom:25px;}
.lab-rest>.lab-text-button{display:block;margin:12px auto;}
.lab-rest-mark{font-size:56px;color:var(--lab-olive);}
.lab-complete-mark{display:inline-flex;flex-direction:column;justify-content:center;border:3px double var(--lab-rust);padding:18px 24px;color:var(--lab-rust);font-size:20px;font-weight:800;transform:rotate(-3deg);}
.lab-complete-mark small{font-size:11px;font-weight:400;margin-top:6px;}
.lab-result-head{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:50px;border-bottom:1px solid var(--ink);padding-bottom:26px;align-items:center;}
.lab-result-head h1{font-size:clamp(34px,5vw,53px);margin:14px 0 22px;}
.lab-result-head p{max-width:37em;}
.lab-result-ticket{border:1px solid var(--line);padding:15px;color:var(--lab-olive);text-align:center;}
.lab-route-art{display:block;width:100%;height:auto;}
.lab-route-art text{font-size:12px;font-family:system-ui,sans-serif;font-weight:700;}
.lab-result-ticket>span{display:block;font-weight:800;letter-spacing:.35em;padding-left:.35em;font-size:20px;color:var(--ink);}
.lab-result-ticket small{display:block;font-size:11px;color:var(--muted);margin-top:7px;}
.lab-section-line{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:27px 0 18px;}
.lab-section-line h2{font-size:24px;margin:0;}
.lab-section-line>span{font-size:12px;color:var(--muted);}
.lab-dimension-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;}
.lab-dimension{font:inherit;min-width:0;text-align:left;padding:17px;border:1px solid var(--line);background:transparent;cursor:pointer;display:flex;flex-direction:column;align-items:stretch;color:var(--ink);}
.lab-dimension[aria-pressed=true]{background:var(--ds-soft);border-color:var(--ink);}
.lab-dimension .ds-kicker{font-size:11px;margin-bottom:12px;}
.lab-dimension>b{font-size:17px;font-weight:700;}
.lab-dimension>strong{font-size:13px;color:var(--muted);margin:7px 0 20px;font-weight:500;}
.lab-meter{display:block;height:6px;background:#ded8c9;position:relative;margin:0 7px 12px;}
.lab-meter::before{content:"";position:absolute;left:50%;top:-3px;height:12px;border-left:1px solid var(--muted);}
.lab-meter i{display:block;width:12px;height:12px;background:var(--lab-rust);position:absolute;top:-3px;border-radius:50%;transform:translateX(-50%);}
.lab-meter-labels{display:flex;justify-content:space-between;gap:10px;font-size:10px;color:var(--muted);}
.lab-dimension>small{font-size:10px;color:var(--muted);margin-top:12px;}
.lab-open{font-size:11px;display:block;margin-top:13px;}
.lab-detail{background:var(--ds-soft);padding:25px;margin:25px 0 35px;}
.lab-detail h3{font-size:27px;margin:0 0 15px;}
.lab-detail>p{font-size:14px;}
.lab-context-pair{display:grid;grid-template-columns:1fr 1fr;gap:35px;border-top:1px solid var(--line);margin-top:22px;padding-top:18px;}
.lab-context-pair p{font-size:13px;color:var(--muted);margin:0;}
.lab-context-pair b{display:block;color:var(--ink);margin-bottom:7px;}
.lab-reflection{border-left:3px solid var(--lab-olive);padding-left:14px;margin-top:23px;}
.lab-card-maker{display:grid;grid-template-columns:1fr 1fr;gap:32px;border-top:1px solid var(--ink);padding:26px 0;}
.lab-card-maker h2,.lab-campus-practice h2{font-size:25px;margin-bottom:13px;}
.lab-card-maker p{font-size:13px;color:var(--muted);max-width:34em;}
.lab-card-maker label{font-size:12px;}
.lab-card-maker input{display:block;width:100%;min-height:44px;font:inherit;padding:10px;background:transparent;border:1px solid var(--line);margin-top:8px;}
.lab-card-maker .ds-actions{margin-top:16px;}
.lab-campus-practice{border-top:1px solid var(--line);padding:28px 0;}
.lab-campus-practice p{font-size:14px;max-width:52em;color:var(--muted);}
.lab-review{border-top:1px solid var(--line);}
.lab-review ol{padding-left:25px;}
.lab-review li{display:flex;gap:12px;border-bottom:1px solid var(--line);padding:15px 0;font-size:13px;align-items:center;}
.lab-review li>div{flex:1;min-width:0;}
.lab-review li small{display:block;font-size:12px;color:var(--muted);margin-top:8px;}
.lab-review li button{flex-shrink:0;}
.lab-result-boundary{border-top:1px solid var(--line);padding-top:25px;margin-top:25px;font-size:12px;color:var(--muted);overflow-wrap:anywhere;}
.lab-result-boundary h2{font-size:18px;color:var(--ink);}
.lab-sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
@media(max-width:800px){.lab-intro{gap:24px;}.lab-dimension-grid{grid-template-columns:repeat(2,minmax(0,1fr));}.lab-route button{grid-template-columns:20px 1fr;}.lab-route small{grid-column:2;text-align:left;}.lab-result-head{grid-template-columns:minmax(0,1fr) 175px;gap:25px;}}
@media(max-width:620px){.lab-intro,.lab-card-maker{grid-template-columns:1fr;}.lab-cover{max-width:420px;}.lab-entry-steps{gap:10px;font-size:12px;}.lab-entry-steps b{display:block;margin:0 0 5px;}.lab-result-head{grid-template-columns:1fr;}.lab-result-ticket{max-width:200px;}.lab-context-pair{grid-template-columns:1fr;gap:18px;}.lab-section-line{align-items:flex-start;flex-direction:column;gap:6px;}.lab-nav-links{gap:14px;font-size:12px;}.lab-nav-links a:first-child{display:none;}.lab-endpoints{gap:18px;}.lab-endpoints p{font-size:14px;}.lab-route{gap:10px;}.lab-route span{font-size:12px;}}
@media(max-width:380px){.lab-intro h1{font-size:35px;}.lab-cover{padding:14px;}.lab-choice{padding:10px 0;}.lab-options{gap:2px;}.lab-choice>span:last-child{max-width:none;white-space:nowrap;}.lab-choice-symbol{width:30px;height:30px;}.lab-route span{font-size:11px;}.lab-route button{gap:5px;grid-template-columns:15px 1fr;}.lab-endpoints{gap:12px;}.lab-dimension{padding:13px 10px;}.lab-meter-labels{gap:7px;flex-direction:column;font-size:11px;}.lab-review li{flex-direction:column;align-items:flex-start;}.lab-detail{padding:18px;}}
@media(prefers-reduced-motion:reduce){.lab-page *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}}