:root{color-scheme:light;--ink:#263e36;--muted:#738079;--green:#2c6552;--line:#dce2d7;--paper:#f6f6ef;--white:#fffefa;--accent:#d7b267;font-family:"Segoe UI","Microsoft YaHei",sans-serif;font-synthesis:none}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-size:14px;line-height:1.6}button,input,select,textarea{font:inherit;color:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}button{transition:background .15s,border-color .15s,transform .15s}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #b98a38;outline-offset:3px}a{color:inherit;text-decoration:none}button{border:1px solid var(--line);background:var(--white);border-radius:8px}button:hover{border-color:#779886}h1,h2,h3,p{margin:0}button svg{pointer-events:none}small{font-size:10px;letter-spacing:1px}main{max-width:1512px;margin:auto;padding:0 44px}.site-header{max-width:1512px;margin:auto;padding:25px 44px 20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-weight:650;font-size:16px}.brand small{display:block;font-weight:400;color:var(--muted);font-size:8px;letter-spacing:1.5px;margin-top:1px}.brand-mark{display:grid;place-items:center;background:var(--green);color:white;border-radius:11px;width:40px;height:43px;font-size:28px}.site-header nav{display:flex;align-items:center;gap:24px;font-size:12px}.site-header nav a span{margin-left:20px}.header-divider{height:20px;width:1px;background:var(--line)}.edition{font-size:10px;letter-spacing:1.8px;color:var(--muted)}.intro{display:flex;justify-content:space-between;align-items:center;padding:44px 0 36px}.eyebrow{font-size:10px;letter-spacing:1.8px;font-weight:650;color:var(--green)}.eyebrow>span{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--green);margin-right:9px;vertical-align:middle}h1{font-family:"Songti SC","SimSun",serif;font-weight:500;font-size:46px;letter-spacing:1px;line-height:1.45;margin:12px 0}h1 span{color:#648571}.intro-copy{color:var(--muted);font-size:13px}.intro-aside{display:flex;gap:35px;align-items:center;padding-right:15px}.intro-aside p{border-left:1px solid var(--line);padding-left:32px}.intro-aside strong{font-size:29px;font-weight:400;font-family:Georgia,serif;display:block}.intro-aside p span{font-size:11px;color:var(--muted)}.orbit{position:relative;width:120px;height:100px;display:grid;place-items:center}.orbit i{position:absolute;width:115px;height:43px;border:1px solid #a9b9a4;border-radius:50%;transform:rotate(0)}.orbit i:nth-child(2){transform:rotate(60deg)}.orbit i:nth-child(3){transform:rotate(-60deg)}.orbit i:before{content:'';width:7px;height:7px;background:#c9a565;border-radius:50%;position:absolute;left:15px;top:0}.orbit b{font-family:Georgia,serif;font-size:23px;font-weight:400}.mobile-break{display:none}.experiment-nav{display:grid;grid-template-columns:repeat(6,1fr);gap:9px;margin-bottom:28px}.experiment-card{text-align:left;padding:14px 16px;position:relative;border-radius:9px;min-height:92px;background:transparent}.experiment-card[aria-pressed=true]{background:var(--green);border-color:var(--green);color:white;box-shadow:0 4px 10px #264b3510}.experiment-card .number{font-family:Georgia,serif;font-size:13px;opacity:.6}.experiment-card .done{position:absolute;right:14px;top:13px;font-size:11px}.experiment-card strong{display:block;font-size:14px;font-weight:550;margin:4px 0 2px}.experiment-card small{font-size:9px;opacity:.65;letter-spacing:1px}.workbench{background:var(--white);border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 8px 35px #273d3010;scroll-margin-top:15px}.bench-heading{display:flex;justify-content:space-between;align-items:center;padding:25px 28px 21px;gap:15px}.bench-heading h2{font-family:"Songti SC","SimSun",serif;font-size:26px;font-weight:500;margin-top:5px}.bench-heading p{color:var(--muted);font-size:12px;margin-top:5px}.bench-options{display:flex;align-items:flex-end;gap:15px}.bench-options label{font-size:10px;color:var(--muted)}select{display:block;max-width:100%;padding:9px 26px 9px 10px;border:1px solid var(--line);border-radius:6px;background:var(--white);font-size:12px}.bench-options select{margin-top:4px}.quiet-button{padding:9px 13px;background:transparent;font-size:12px}.mode-row{padding:12px 28px;background:#f9faf5;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;gap:20px;align-items:center}.segmented{display:flex;padding:3px;border-radius:7px;background:#e9eee5;gap:3px}.segmented button{border:0;background:transparent;font-size:11px;padding:6px 14px;border-radius:5px}.segmented button[aria-pressed=true]{background:var(--white);box-shadow:0 2px 5px #30432c12;color:var(--green)}.mode-row p{font-size:11px;color:var(--muted)}.lab-grid{display:grid;grid-template-columns:218px minmax(0,1fr) 282px;align-items:stretch}.supply-panel{padding:22px 18px;border-right:1px solid var(--line)}.panel-label{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.panel-label>span{font-size:10px;letter-spacing:1px;color:var(--muted)}.panel-label small{font-size:11px;color:var(--ink);letter-spacing:0}.small-copy{font-size:10px;color:var(--muted);margin-bottom:18px}.supply-panel h3{font-size:11px;font-weight:550;margin:15px 0 10px;display:flex;justify-content:space-between}.supply-panel h3 span{color:var(--muted)}.tool-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:7px}.supply-item{display:flex;align-items:center;flex-direction:column;justify-content:center;border:1px solid #e5e8e0;border-radius:7px;background:#fafbf7;position:relative;min-width:0;min-height:78px;padding:6px 2px;font-size:10px;touch-action:manipulation}.supply-item svg{width:40px;height:42px;display:block;margin-bottom:3px}.supply-item.selected{border-color:var(--green);background:#edf4e9;box-shadow:inset 0 0 0 1px var(--green)}.supply-item.placed{background:#f0f3eb}.supply-item.placed:after{content:'✓';position:absolute;right:6px;top:2px;color:var(--green)}.supply-item small{font-family:Georgia,serif;letter-spacing:0;color:var(--muted);font-size:9px}.shelf-divider{height:1px;background:var(--line);margin:20px 0}.reagent-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:7px}.dose-control{margin-top:18px;background:#f2f4ed;padding:12px;border-radius:7px}.dose-control label{font-size:10px;display:flex;justify-content:space-between}.dose-control label span{color:var(--muted)}.dose-control>div{display:flex;margin-top:8px;height:34px}.dose-control button{border:0;border-radius:5px;width:32px;flex-shrink:0;font-size:16px;background:var(--white)}.dose-control input{width:100%;min-width:0;text-align:center;border:0;outline-offset:0;background:transparent;font-size:16px;font-family:Georgia,serif;-moz-appearance:textfield}.dose-control input::-webkit-inner-spin-button{-webkit-appearance:none}.dose-control p{font-size:9px;color:var(--muted);margin-top:8px}.stage-panel{background:#f5f7f1;min-width:0;padding-bottom:15px}.stage-top{display:flex;justify-content:space-between;align-items:center;padding:17px 22px 0;font-size:10px;color:var(--muted)}.live-dot{display:inline-block;width:5px;height:5px;border-radius:50%;background:#75a489;margin-right:5px}.view-switch{display:flex;gap:3px}.view-switch button{font-size:10px;padding:4px 10px;border:0;background:transparent}.view-switch button[aria-pressed=true]{background:#e3ebe0;color:var(--green)}.stage{display:block;width:100%;border:0;background:transparent;border-radius:0;padding:0 8px;position:relative;min-height:310px;overflow:hidden}.stage:hover{background:#eaf1e780}.stage.drag-over{box-shadow:inset 0 0 0 2px var(--green);background:#e5eee1}.stage svg{display:block;width:100%;height:auto;max-height:420px}.stage #selection-hint{position:absolute;bottom:12px;left:50%;transform:translateX(-50%);white-space:normal;width:max-content;max-width:88%;font-size:10px;padding:5px 12px;background:#ffffffce;border:1px solid #dce4d5;border-radius:20px;pointer-events:none}.phenomenon{display:flex;gap:12px;align-items:baseline;margin:0 20px 14px;padding:10px 12px;background:#e9eee3;border-radius:7px;font-size:11px;min-height:39px}.phenomenon>span{color:#789079;white-space:nowrap;font-size:9px}.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin:0 20px;border:1px solid #dbe2d4;border-radius:8px;background:#fbfcf7}.metric{padding:12px 8px;text-align:center;min-width:0}.metric+.metric{border-left:1px solid #dbe2d4}.metric span{display:block;font-size:9px;color:var(--muted)}.metric strong{display:block;font-family:Georgia,serif;font-weight:400;font-size:23px;line-height:1.4;margin-top:3px;overflow-wrap:anywhere}.metric small{font-size:9px;letter-spacing:0;color:var(--muted);margin-left:3px}.action-bar{display:flex;flex-wrap:wrap;gap:8px;padding:17px 20px 10px}.action-bar button{font-size:11px;padding:9px 14px;border-color:#ccd9c8;background:#fffefa}.feedback{font-size:11px;padding:0 20px;min-height:38px;color:#4d7458}.feedback.error{color:#a3563a}.model-note{margin:13px 20px 0;border-top:1px dashed #d1dacc;padding-top:11px;font-size:9px;display:flex;gap:10px;color:#8b9487}.model-note>span{white-space:nowrap}.guide-panel{padding:22px 22px 20px;border-left:1px solid var(--line);min-width:0}.steps{list-style:none;padding:10px 0 0;margin:0 0 14px}.steps li{position:relative;padding:0 0 19px 34px}.steps li:before{content:'';position:absolute;left:11px;top:23px;width:1px;height:calc(100% - 22px);background:#dde4d8}.steps li:last-child:before{display:none}.step-index{position:absolute;left:0;top:0;display:grid;place-items:center;border:1px solid #d7e0d2;border-radius:50%;width:23px;height:23px;font-size:10px;background:#fafbf7;color:#8b9888}.steps li.complete .step-index{background:#e6efe0;color:#386046;border-color:#c9dbbe}.steps li.current .step-index{background:var(--green);color:white;border-color:var(--green)}.steps strong{font-size:12px;font-weight:550}.steps p{font-size:10px;color:var(--muted);line-height:1.8;margin-top:5px}.principle{border-top:1px solid var(--line);padding-top:18px}.principle>p{font-size:11px;color:#73806e;line-height:1.85}.principle .eyebrow{font-size:9px}.principle .equation{font-family:Georgia,"Microsoft YaHei",serif;color:var(--green);background:#f2f5ec;border-radius:5px;padding:10px;font-size:12px;margin:10px 0}.principle .advanced{margin-top:10px;padding-left:10px;border-left:2px solid #c4d4bb;color:#58715b}.question{margin-top:20px}.question label{display:block;font-size:11px;line-height:1.8;margin-bottom:8px}.question select{width:100%;font-size:10px;margin-bottom:10px;white-space:normal}.primary-button{display:flex;align-items:center;justify-content:center;gap:16px;border:1px solid var(--green);background:var(--green);color:white;font-size:11px;padding:11px 14px;border-radius:7px}.primary-button:hover{background:#214d3e;border-color:#214d3e}.question .primary-button{width:100%}.question>p{font-size:10px;color:var(--muted);margin-top:8px}.challenge-box{background:#f5eedc;border:1px solid #e3d6ae;padding:12px;border-radius:7px;margin:15px 0;font-size:11px}.challenge-box>span{font-size:9px;letter-spacing:2px;color:#a78642}.challenge-box p{margin-top:6px}.notebook{margin:36px 0 24px;border:1px solid var(--line);background:#fffefa;border-radius:12px;padding:28px}.notebook-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:23px}.notebook h2{font-family:"Songti SC","SimSun",serif;font-size:22px;font-weight:500;margin-top:7px}.local-badge{border:1px solid var(--line);border-radius:20px;font-size:10px;color:var(--muted);padding:4px 10px;white-space:nowrap}.notebook-grid{display:grid;grid-template-columns:1fr 1fr;gap:35px}.record-heading{display:flex;justify-content:space-between;margin-bottom:12px}.record-heading h3{font-size:12px;font-weight:500}.record-heading span{font-size:10px;color:var(--muted)}.operation-log{list-style:none;padding:0;margin:0;max-height:205px;overflow:auto;border-top:1px solid var(--line)}.operation-log li{padding:9px 5px;border-bottom:1px dashed var(--line);font-size:11px;color:#70816e}.operation-log li span{display:inline-block;font-family:Georgia,serif;font-size:10px;width:25px;color:#a0ac98}.notes-panel label{display:block;font-size:11px;margin-bottom:6px}.notes-panel textarea{width:100%;resize:vertical;border:1px solid var(--line);border-radius:6px;background:#fafbf7;padding:10px;font-size:11px;margin-bottom:10px;min-height:65px}.notes-panel textarea::placeholder{color:#a0a79c}.report-actions{display:flex;gap:8px;flex-wrap:wrap}.notes-panel #save-status{font-size:10px;color:var(--muted);margin-top:9px}.text-button{border:0;background:none;padding:4px 0;font-size:11px;color:var(--green);border-radius:0}footer{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:12px 0 30px;font-size:11px;color:var(--muted)}footer>span{color:var(--ink)}footer small{display:block;font-size:8px;letter-spacing:1px;margin-top:3px}footer p{font-size:10px}.trend{margin-top:12px}.trend svg{display:block;width:100%;height:85px;background:#f5f7f1;border-radius:5px}.trend p{font-size:9px;color:var(--muted)}dialog{border:1px solid var(--line);border-radius:14px;padding:34px;max-width:660px;width:calc(100% - 30px);max-height:85vh;overflow:auto;color:var(--ink);background:var(--white);box-shadow:0 20px 70px #10251a33}dialog::backdrop{background:#142b255e;backdrop-filter:blur(4px)}.dialog-close{position:absolute;right:12px;top:12px;border:0;background:none;font-size:23px;line-height:1;width:32px;height:32px}dialog h2{font-size:23px;margin:5px 0 20px;font-weight:500}dialog h3{font-size:14px;margin:18px 0 5px}dialog p,dialog li{font-size:12px;margin:9px 0;line-height:1.9}dialog a{text-decoration:underline;color:var(--green)}dialog pre{white-space:pre-wrap;font:12px/1.9 inherit;overflow-wrap:anywhere}.skip{position:fixed;top:-100px;left:15px;z-index:9;background:var(--green);color:white;padding:12px}.skip:focus{top:10px}#print-area{display:none}.bubble{animation:float-up 2.4s ease-in infinite}.particle{animation:drift 5s ease-in-out infinite alternate;transform-box:fill-box;transform-origin:center}.glass-liquid{transition:y .4s,height .4s,fill .4s}.noscript{padding:20px;background:#f7e1b5} [hidden]{display:none!important}@keyframes float-up{from{transform:translateY(20px);opacity:0}30%{opacity:.8}to{transform:translateY(-70px);opacity:0}}@keyframes drift{to{transform:translate(6px,-7px)}}
@media(min-width:1600px){.stage{min-height:370px}.lab-grid{grid-template-columns:230px minmax(0,1fr) 300px}}@media(max-width:1190px){main{padding:0 24px}.site-header{padding-left:24px;padding-right:24px}.lab-grid{grid-template-columns:180px minmax(0,1fr) 242px}.supply-panel{padding:18px 12px}.guide-panel{padding:18px 15px}.stage{min-height:290px}.stage svg{min-height:280px}.stage-top{padding:15px 14px 0}.experiment-card{padding:12px}.experiment-card strong{font-size:12px}.mode-row p{font-size:10px}.metric strong{font-size:20px}.metrics{margin:0 12px}.intro-aside{gap:12px}}@media(max-width:970px){.lab-grid{grid-template-columns:185px minmax(0,1fr)}.guide-panel{grid-column:1/-1;border-left:0;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:0 28px;padding:24px}.guide-panel .panel-label{grid-column:1/-1}.guide-panel .steps{grid-row:2/5}.guide-panel .principle{border-top:0}.guide-panel .question{grid-column:2}.guide-panel .challenge-box{grid-column:1/-1}.guide-panel:has(.challenge-box:not([hidden])) .steps{grid-row:3/5}.stage svg{max-height:390px}.stage{min-height:340px}.experiment-nav{grid-template-columns:repeat(3,1fr)}.experiment-card{min-height:78px}.experiment-card strong{font-size:14px}.intro-aside .orbit{display:none}.intro-aside p{padding-left:20px}.intro{padding:30px 0}.mode-row{justify-content:space-between}.bench-heading{padding:22px}.bench-options{flex-direction:column;gap:8px;align-items:stretch}.intro h1{font-size:39px}}@media(max-width:620px){main{padding:0 14px}.site-header{padding:16px 18px}.brand{font-size:13px}.brand-mark{width:33px;height:36px;font-size:23px}.brand small{font-size:6px}.edition,.header-divider{display:none}.site-header nav{font-size:11px}.site-header nav a span{margin-left:7px}.intro{padding:27px 2px 23px}.intro h1{font-size:30px;letter-spacing:0;line-height:1.5;margin:9px 0}.intro h1 span{display:block}.intro .eyebrow{font-size:8px;letter-spacing:1px}.intro-copy{font-size:11px}.mobile-break{display:block}.intro-aside{padding:0}.intro-aside p{padding-left:15px}.intro-aside strong{font-size:24px}.intro-aside p span{font-size:9px}.experiment-nav{gap:6px;margin-bottom:19px}.experiment-card{padding:9px 10px;min-height:77px}.experiment-card strong{font-size:11px}.experiment-card small{font-size:8px;letter-spacing:0}.experiment-card .number{font-size:11px}.experiment-card .done{right:8px;top:9px}.bench-heading{padding:18px 15px;align-items:flex-start}.bench-heading h2{font-size:22px}.bench-heading p{font-size:10px;max-width:190px}.bench-heading .eyebrow{font-size:8px;letter-spacing:1px}.bench-options{gap:7px;width:128px;flex-shrink:0}.bench-options label{font-size:9px}.bench-options select{font-size:9px;padding:7px 17px 7px 6px}.bench-options .quiet-button{padding:6px;font-size:10px}.mode-row{padding:10px 12px;display:block}.segmented{width:max-content}.segmented button{font-size:10px;padding:6px 12px}.mode-row p{margin:6px 2px 0}.lab-grid{display:flex;flex-direction:column}.supply-panel{border-right:0;border-bottom:1px solid var(--line);padding:12px}.supply-panel .panel-label,.supply-panel .small-copy,.shelf-divider{display:none}.supply-panel h3{font-size:10px;margin:5px 0}.tool-grid{display:flex;gap:6px}.tool-grid .supply-item{flex:1;min-height:49px;flex-direction:row;gap:3px;max-width:110px}.tool-grid .supply-item svg{width:25px;height:32px;margin:0}.reagent-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}.reagent-grid .supply-item{min-height:66px;padding:4px;font-size:9px}.reagent-grid .supply-item svg{width:24px;height:27px;margin:0}.reagent-grid .supply-item small{font-size:8px}.dose-control{margin-top:10px;display:flex;align-items:center;gap:12px;padding:8px 10px}.dose-control>div{width:112px;height:29px;margin:0}.dose-control label{display:block;white-space:nowrap;font-size:9px}.dose-control label span{display:block;font-size:8px}.dose-control p{font-size:8px;margin:0;flex:1}.dose-control input{font-size:15px}.dose-control button{width:27px}.stage-top{padding-top:13px}.stage{min-height:250px}.stage svg{min-height:240px;max-height:290px}.stage #selection-hint{font-size:9px;bottom:8px}.phenomenon{margin:0 12px 10px;font-size:10px}.metrics{margin:0 12px}.metric{padding:10px 4px}.metric strong{font-size:21px}.metric span{font-size:8px}.action-bar{padding:12px}.feedback{padding:0 12px;font-size:10px;min-height:30px}.model-note{margin:9px 12px 0;font-size:8px;gap:7px}.guide-panel{display:block;padding:20px 18px}.guide-panel .steps{display:grid;grid-template-columns:1fr 1fr;gap:0 15px;margin-top:5px}.steps li:before{display:none}.steps li{padding-left:29px;padding-bottom:17px}.steps strong{font-size:11px}.steps p{font-size:9px}.principle{border-top:1px solid var(--line)!important}.question{margin-top:15px}.question label{font-size:11px}.question select{font-size:11px}.question>p{font-size:10px}.notebook{margin:22px 0;padding:18px 15px}.notebook-heading{display:block;margin-bottom:18px}.notebook h2{font-size:19px}.local-badge{display:inline-block;font-size:8px;margin-top:10px}.notebook-grid{grid-template-columns:1fr;gap:22px}.operation-log{max-height:145px}.report-actions{gap:6px}.report-actions .primary-button,.report-actions .quiet-button{font-size:10px;padding:9px 10px}footer{flex-wrap:wrap;font-size:10px;padding-bottom:20px}footer p{order:3;width:100%;font-size:9px}.text-button{font-size:10px}dialog{padding:25px 20px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{body>*{display:none!important}#print-area{display:block!important;color:#111;background:white;font-size:12pt;padding:10mm}#print-area h1{font-size:23pt}#print-area pre{white-space:pre-wrap;font:11pt/1.8 "Microsoft YaHei",sans-serif;overflow-wrap:anywhere}@page{margin:12mm}}
.skip:not(:focus){clip-path:inset(100%);width:1px;height:1px;overflow:hidden;white-space:nowrap}
@media(max-width:620px){.segmented button{min-height:40px;font-size:12px}.mode-row p{font-size:11px}.tool-grid .supply-item{font-size:12px;min-height:52px}.reagent-grid .supply-item{font-size:11px;min-height:74px}.reagent-grid .supply-item small{font-size:10px}.dose-control{flex-wrap:wrap}.dose-control label{font-size:11px}.dose-control>div{height:38px;width:135px}.dose-control button{width:36px}.dose-control p{font-size:10px}.stage-top{font-size:11px}.view-switch button{min-height:36px;font-size:11px}.action-bar button{min-height:44px;font-size:12px}.feedback{font-size:12px}.phenomenon{font-size:12px}.phenomenon>span{font-size:10px}.metric span{font-size:10px}.model-note{font-size:10px}.steps strong{font-size:13px}.steps p{font-size:12px}.principle>p{font-size:12px}.question label{font-size:13px}.question select{font-size:12px;min-height:42px}.question .primary-button{font-size:13px;min-height:44px}.question>p{font-size:12px}.notes-panel label,.notes-panel textarea{font-size:13px}.operation-log li{font-size:12px}.notes-panel #save-status{font-size:11px}.report-actions .primary-button,.report-actions .quiet-button{font-size:12px;min-height:44px}.bench-options .quiet-button{min-height:38px}.experiment-card strong{font-size:12px}}