:root{--ink:#17201b;--muted:#667069;--paper:#f4f1e8;--surface:#fffdf7;--line:#d8d5ca;--green:#174f3a;--green-2:#2d7257;--lime:#cde96a;--orange:#e66a2c;--blue:#376d8d;--red:#a74232;--shadow:0 12px 34px rgba(31,48,39,.09);--radius:18px;--max:1440px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:78px}body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",Inter,system-ui,sans-serif;line-height:1.65}button,input,select{font:inherit}button,a{touch-action:manipulation}a{color:inherit}.skip-link{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 12px;z-index:100}.skip-link:focus{left:8px}.site-header{position:sticky;top:0;z-index:50;height:68px;background:rgba(244,241,232,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 max(24px,calc((100vw - var(--max))/2));gap:30px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;white-space:nowrap}.brand-mark{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--ink);color:var(--lime)}.top-nav{display:flex;gap:22px;margin:auto}.top-nav a,.footer-links a{text-decoration:none;color:var(--muted);font-size:14px}.top-nav a:hover,.footer-links a:hover{color:var(--ink)}.header-actions{display:flex;align-items:center;gap:12px}.mode-switch{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--muted);cursor:pointer}.mode-switch input{position:absolute;opacity:0}.switch-track{width:38px;height:22px;border-radius:20px;background:#c9c7be;position:relative;transition:.2s}.switch-track:after{content:"";position:absolute;width:16px;height:16px;left:3px;top:3px;border-radius:50%;background:#fff;transition:.2s}.mode-switch input:checked+.switch-track{background:var(--green)}.mode-switch input:checked+.switch-track:after{transform:translateX(16px)}.section-shell{width:min(var(--max),calc(100% - 48px));margin:0 auto}.hero{min-height:690px;padding:92px 0 80px;display:grid;grid-template-columns:1.08fr .92fr;align-items:center;gap:70px}.eyebrow,.section-kicker,.lab-number{font-weight:800;letter-spacing:.12em;color:var(--green);font-size:12px;text-transform:uppercase}.hero h1{font-family:Georgia,"Songti SC",serif;font-size:clamp(48px,6vw,86px);line-height:1.02;letter-spacing:-.045em;margin:20px 0 28px;font-weight:500}.hero h1 em{color:var(--green);font-style:normal}.hero-lead{font-size:18px;color:var(--muted);max-width:660px}.hero-actions,.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:30px}.button{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:999px;padding:10px 18px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;transition:.15s}.button:hover{transform:translateY(-1px);border-color:#aaa}.button:focus-visible,.icon-button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid rgba(55,109,141,.35);outline-offset:2px}.button.primary{background:var(--green);color:#fff;border-color:var(--green)}.button.ghost{background:transparent}.button.danger{color:var(--red)}.button.compact{padding:7px 13px}.button.block{width:100%;margin-top:8px}.data-legend{display:flex;gap:20px;flex-wrap:wrap;margin-top:30px;font-size:12px;color:var(--muted)}.dot{width:8px;height:8px;border-radius:50%;display:inline-block;margin-right:6px}.dot.real{background:var(--green)}.dot.simulated{background:var(--orange)}.dot.local{background:var(--blue)}.hero-visual{height:500px;position:relative;display:grid;place-items:center;border-radius:50%;background:radial-gradient(circle,var(--surface) 0 36%,transparent 37%),repeating-radial-gradient(circle,transparent 0 23%,rgba(23,79,58,.13) 23.3% 23.6%,transparent 24% 35%);border:1px solid rgba(23,79,58,.18)}.hero-number{text-align:center;display:flex;flex-direction:column}.hero-number strong{font-family:Georgia,serif;font-size:70px;line-height:1}.hero-number span{color:var(--muted)}.orbit-label{position:absolute;background:var(--ink);color:#fff;padding:7px 13px;border-radius:99px;font-size:12px}.label-a{top:16%;left:12%}.label-b{top:35%;right:5%}.label-c{bottom:17%;left:7%}.stat-ribbon{position:absolute;bottom:-22px;background:var(--lime);border:1px solid rgba(23,32,27,.2);padding:15px 24px;border-radius:14px;display:flex;gap:25px;box-shadow:var(--shadow)}.stat-ribbon span{display:flex;gap:5px;white-space:nowrap;font-size:12px}.intro-grid{padding:80px 0 110px;display:grid;grid-template-columns:1.15fr .85fr;gap:80px;border-top:1px solid var(--line)}h2{font-family:Georgia,"Songti SC",serif;font-size:clamp(34px,4vw,54px);line-height:1.12;margin:12px 0 28px;font-weight:500;letter-spacing:-.02em}h3{margin:0 0 14px}.learning-path{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);border-left:1px solid var(--line)}.learning-path a{padding:24px;text-decoration:none;border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:grid;grid-template-columns:40px 1fr;gap:2px 10px}.learning-path a:hover{background:rgba(205,233,106,.2)}.learning-path span{grid-row:1/3;color:var(--green);font-weight:800}.learning-path small{color:var(--muted)}.dictionary{background:var(--ink);color:#fff;padding:28px;border-radius:var(--radius);align-self:start;box-shadow:var(--shadow)}.dictionary h3{font-family:Georgia,"Songti SC",serif;font-size:26px}.dictionary-row{display:grid;grid-template-columns:1.1fr 1fr auto;gap:10px;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.16);align-items:center;font-size:13px}.dictionary-row code{color:var(--lime)}.dictionary-row b{font-size:11px;border:1px solid rgba(255,255,255,.3);padding:3px 6px;border-radius:4px}.note{font-size:12px;color:#c6cec9;margin-top:18px}.note code{color:var(--lime)}.lab{padding:100px 0;border-top:1px solid var(--line)}.lab-heading{display:flex;justify-content:space-between;gap:30px;align-items:flex-start}.lab-heading h2{margin-bottom:16px}.lab-heading p:last-child{color:var(--muted);max-width:760px}.status-chip{white-space:nowrap;border-radius:99px;padding:7px 12px;font-size:12px;font-weight:800}.real-chip{background:rgba(23,79,58,.1);color:var(--green)}.simulated-chip{background:rgba(230,106,44,.12);color:#a64117}.workflow{display:grid;grid-template-columns:repeat(4,1fr);margin:35px 0 26px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.workflow span{text-align:center;padding:10px;color:var(--muted);font-size:12px;border-right:1px solid var(--line)}.workflow span:last-child{border:0}.workflow .active{background:var(--ink);color:#fff}.lab-layout{display:grid;grid-template-columns:250px minmax(0,1fr) 250px;gap:22px;align-items:start}.controls-panel,.interpret-panel{position:sticky;top:92px}.controls-panel,.interpret-panel,.visual-panel{min-width:0}.controls-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px}.controls-panel label{display:block;margin:14px 0;color:var(--muted);font-size:12px;font-weight:700}.controls-panel input[type=search],.controls-panel input[type=number],.controls-panel select{display:block;width:100%;margin-top:6px;background:#fff;border:1px solid var(--line);border-radius:9px;padding:9px;color:var(--ink)}.controls-panel input[type=range]{width:100%;accent-color:var(--green);margin-top:6px}.controls-panel output{float:right;color:var(--ink)}.controls-panel .check{display:flex;align-items:flex-start;gap:8px}.controls-panel .check input{margin-top:3px;accent-color:var(--green)}.visual-panel{background:var(--surface);border-radius:var(--radius);padding:22px;border:1px solid var(--line);box-shadow:var(--shadow)}.interpret-panel{padding:18px 0}.interpret-panel>p{font-family:Georgia,"Songti SC",serif;font-size:19px;line-height:1.5}.concept{border-top:1px solid var(--line);padding:15px 0;display:flex;flex-direction:column;gap:4px}.concept b{font-size:12px;color:var(--green);text-transform:uppercase}.concept span{font-size:13px;color:var(--muted)}.concept.caution b{color:var(--orange)}.metric-line{display:grid;grid-template-columns:repeat(3,1fr);border-bottom:1px solid var(--line);margin-bottom:20px}.metric-line.four{grid-template-columns:repeat(4,1fr)}.metric-line>div{padding:0 12px 16px;border-right:1px solid var(--line)}.metric-line>div:first-child{padding-left:0}.metric-line>div:last-child{border:0}.metric-line span{display:block;color:var(--muted);font-size:11px}.metric-line strong{display:block;font-family:Georgia,serif;font-size:26px;margin-top:3px;overflow-wrap:anywhere}.chart-heading{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}.chart-heading h3{margin:0}.chart-heading p{margin:3px 0;color:var(--muted);font-size:12px}.icon-button{border:1px solid var(--line);background:transparent;border-radius:50%;width:34px;height:34px;cursor:pointer}.chart-wrap{padding-top:15px}.chart{min-height:360px;width:100%;position:relative}.chart svg{display:block;width:100%;height:auto;overflow:visible}.chart text{font-family:inherit;fill:var(--ink)}.chart .muted{fill:var(--muted)}.chart .grid{stroke:var(--line);stroke-width:1}.chart .bar{fill:var(--green-2)}.chart .bar-accent{fill:var(--orange)}.chart .point{fill:var(--green);opacity:.45}.chart .regression{stroke:var(--orange);stroke-width:3}.chart .truth{stroke:var(--orange);stroke-width:3;stroke-dasharray:6 4}.chart-empty{min-height:300px;display:grid;place-items:center;color:var(--muted)}.chart-wrap:fullscreen{background:var(--surface);padding:40px;overflow:auto}.chart-wrap:fullscreen .chart{max-width:1200px;margin:auto}.warning{font-size:12px;color:var(--red);margin:10px 0}.data-table-wrap,.matrix-table{overflow:auto;margin-top:26px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}table{border-collapse:collapse;width:100%;font-size:12px}caption{text-align:left;padding:12px 14px;font-weight:800}th,td{padding:9px 12px;border-top:1px solid var(--line);text-align:left;white-space:nowrap}th{color:var(--muted);font-weight:700;background:#f8f6ef}.matrix-table table{min-width:800px}.quality-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:26px}.quality-grid article{border-top:3px solid var(--green);padding:18px 0}.quality-grid article span{font-size:11px;font-weight:800;color:var(--green)}.quality-grid article p{color:var(--muted);font-size:13px}.quiz{margin-top:36px;background:var(--ink);color:#fff;border-radius:var(--radius);padding:24px;display:grid;grid-template-columns:1.2fr 1.5fr auto;gap:20px;align-items:center}.quiz h3{margin:4px 0}.quiz-label{color:var(--lime);font-size:11px;font-weight:800;letter-spacing:.1em}.quiz-options{display:flex;flex-direction:column;gap:6px}.quiz-options label{font-size:13px}.quiz-options input{accent-color:var(--lime)}.quiz .button{align-self:center}.quiz .ghost{color:#fff}.quiz-feedback{grid-column:1/-1;margin:0;color:var(--lime);font-size:13px}.teacher-only{display:none}.teacher-mode .teacher-only{display:inline-flex}.simulated-section{position:relative}.simulation-banner{background:var(--orange);color:#fff;padding:11px 18px;border-radius:10px;display:flex;gap:12px;margin-bottom:34px;font-size:13px}.simulation-banner b{white-space:nowrap}.progress-section{padding:100px 0;display:grid;grid-template-columns:.8fr 1.2fr;gap:80px;border-top:1px solid var(--line)}.progress-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:25px;display:grid;grid-template-columns:150px 1fr auto;align-items:center;gap:30px}.progress-ring{width:130px;height:130px;border-radius:50%;display:grid;place-content:center;text-align:center;background:conic-gradient(var(--green) var(--progress,0%),#e3e0d6 0);position:relative}.progress-ring:before{content:"";position:absolute;inset:12px;border-radius:50%;background:var(--surface)}.progress-ring>*{position:relative}.progress-ring strong{font-family:Georgia,serif;font-size:28px}.progress-ring span{font-size:11px;color:var(--muted)}#progress-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:10px}#progress-list li{color:var(--muted);font-size:13px}#progress-list li:before{content:"○";margin-right:7px}#progress-list li.done{color:var(--green);font-weight:800}#progress-list li.done:before{content:"●"}.button-stack{display:flex;flex-direction:column;gap:8px}footer{border-top:1px solid var(--line);padding:34px max(24px,calc((100vw - var(--max))/2));display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:13px}footer>div:first-child{display:flex;flex-direction:column}.footer-links{display:flex;gap:20px;flex-wrap:wrap}#toast{position:fixed;right:22px;bottom:22px;background:var(--ink);color:#fff;border-radius:10px;padding:10px 15px;opacity:0;transform:translateY(10px);pointer-events:none;transition:.2s;z-index:100;font-size:13px}#toast.show{opacity:1;transform:translateY(0)}details{margin-top:14px}summary{cursor:pointer;color:var(--green);font-weight:700;font-size:13px}
@media(max-width:1100px){.top-nav{display:none}.site-header{padding:0 20px}.lab-layout{grid-template-columns:220px minmax(0,1fr)}.interpret-panel{grid-column:1/-1;position:static;display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px}.quality-grid{grid-template-columns:1fr 1fr}.hero{gap:30px}.progress-card{grid-template-columns:130px 1fr}.button-stack{grid-column:1/-1;flex-direction:row}.quiz{grid-template-columns:1fr 1fr}.quiz .button{justify-self:start}}
@media(max-width:760px){.section-shell{width:min(100% - 28px,var(--max))}.header-actions .mode-switch{display:none}.site-header{height:60px}.hero{grid-template-columns:1fr;padding:60px 0}.hero h1{font-size:48px}.hero-visual{height:390px}.stat-ribbon{gap:12px;padding:12px}.intro-grid,.progress-section{grid-template-columns:1fr;gap:35px;padding:65px 0}.lab{padding:68px 0}.lab-heading{display:block}.status-chip{display:inline-block;margin-top:10px}.workflow{overflow:auto;grid-template-columns:repeat(4,minmax(115px,1fr))}.lab-layout{grid-template-columns:1fr}.controls-panel,.interpret-panel{position:static}.interpret-panel{display:block}.metric-line.four{grid-template-columns:1fr 1fr}.metric-line.four>div:nth-child(2){border-right:0}.metric-line.four>div:nth-child(n+3){padding-top:12px;border-top:1px solid var(--line)}.quality-grid{grid-template-columns:1fr}.quiz{grid-template-columns:1fr}.progress-card{grid-template-columns:1fr;text-align:center}.progress-ring{margin:auto}#progress-list{text-align:left}.learning-path{grid-template-columns:1fr}.dictionary-row{grid-template-columns:1fr 1fr}.dictionary-row b{grid-column:1/-1;justify-self:start}.footer-links{justify-content:flex-end}footer{align-items:flex-start}.chart{min-height:300px}.simulation-banner{align-items:flex-start}.data-legend{gap:10px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* ── 推断模拟（LAB 03 扩展） ─────────────────────────── */
.mini-lab{margin-top:26px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow)}
.mini-lab-heading .lab-number{font-size:12px;letter-spacing:.12em;color:var(--orange);font-weight:700;text-transform:uppercase}
.mini-lab-heading h3{margin:4px 0 6px;font-size:21px}
.mini-lab-heading p{color:var(--muted);max-width:760px}
.mini-lab-grid{display:grid;grid-template-columns:280px 1fr;gap:22px;margin-top:16px}
.mini-lab-grid .controls-panel{padding:0;border:0;box-shadow:none;background:transparent}
.mini-lab-visual .tall-chart{min-height:560px}
.mini-interpret{margin-top:10px;color:var(--ink);background:rgba(205,233,106,.25);border-left:3px solid var(--green-2);padding:10px 14px;border-radius:0 10px 10px 0;font-size:14px;line-height:1.7}
.ci-hit{stroke:var(--green-2);stroke-width:2.4}
.ci-miss{stroke:var(--red);stroke-width:3.2}
@media(max-width:960px){.mini-lab-grid{grid-template-columns:1fr}.mini-lab-visual .tall-chart{min-height:420px}}

/* ── LAB 08 评分者信度 ──────────────────────────────── */
#rel-table img{border-radius:10px;border:1px solid var(--line);background:#fff}
#rel-table select{font:inherit;padding:6px 10px;border:1px solid var(--line);border-radius:8px;background:#fff;min-width:64px}
#rel-table td{vertical-align:middle}
#rel-matrix table{border-collapse:collapse;margin-top:6px}
#rel-matrix th,#rel-matrix td{border:1px solid var(--line);padding:7px 13px;text-align:center;min-width:44px}
#rel-matrix td.diag{outline:2px solid var(--green-2);outline-offset:-2px}
#rel-details table{border-collapse:collapse;width:100%;margin-top:8px}
#rel-details th,#rel-details td{border-bottom:1px solid var(--line);padding:7px 10px;text-align:left;font-size:14px}

/* ── 课堂模式卡片 ───────────────────────────────────── */
.classroom-card{margin-top:20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;max-width:420px}
.classroom-card h3{margin:0 0 6px}
.classroom-card p{color:var(--muted);font-size:13.5px;line-height:1.6}
.classroom-card label{display:block;font-size:13px;font-weight:700;margin-top:10px}
.classroom-card input,.classroom-card select{width:100%;margin-top:5px;padding:9px 12px;border:1px solid var(--line);border-radius:9px;font:inherit;background:#fff}
.classroom-card .button{margin-top:12px}
.classroom-card .note{font-size:12.5px;color:var(--muted);margin-top:8px}