@charset "UTF-8";
:root{--bg:#f3f4ef;--paper:#fff;--ink:#183b35;--muted:#6d7d76;--teal:#176955;--lime:#d8ed9e;--line:#dce3da;--orange:#bc7035;--serif:Georgia,"Songti SC","STSong",serif}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--bg);font:14px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,select{cursor:pointer}button,a,select,input{touch-action:manipulation}button{border:1px solid var(--line);border-radius:7px;background:var(--paper);color:var(--ink);padding:8px 12px;line-height:1.4}button:hover{background:#edf4e9;border-color:#9fb8a8}button:disabled{opacity:.35;cursor:default}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #a8c67a;outline-offset:3px}select{max-width:100%;border:0;background:transparent;padding:5px 24px 5px 0;color:var(--ink);font-weight:600}p,h1,h2,h3{margin:0}button.primary{background:var(--ink);border-color:var(--ink);color:#fff;font-weight:600;padding:10px 18px;min-width:136px}button.primary:hover{background:var(--teal)}[hidden]{display:none!important}.masthead{height:86px;border-bottom:1px solid var(--line);margin:0 38px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px;font-size:13px;font-weight:750;letter-spacing:2px}.brand-sub{display:block;font-size:10px;font-weight:400;letter-spacing:2px;color:var(--muted)}.brand-mark{font:36px var(--serif);font-weight:700;letter-spacing:-7px;margin-right:9px}.brand-mark span{color:#9cbe63}.back{font-size:12px;color:var(--muted)}main{max-width:1680px;margin:auto;padding:0 38px}.intro{display:flex;align-items:center;justify-content:space-between;gap:22px;padding:35px 0 28px}.eyebrow{font:600 10px/1.4 ui-monospace,SFMono-Regular,monospace;letter-spacing:1.8px;color:var(--teal)}h1{font-size:clamp(26px,2.65vw,41px);letter-spacing:-1.5px;font-weight:650;line-height:1.45;margin:9px 0}h1 span{font-family:var(--serif);font-weight:400;font-style:italic;letter-spacing:-1px;margin-left:22px;color:var(--teal)}.intro p{font-size:13px;color:var(--muted)}.standard{font:600 11px/1.8 ui-monospace,monospace;white-space:nowrap;border:1px solid #ccd7c8;padding:10px 16px;border-radius:6px}.standard>span:last-child{display:block;font:11px/1.7 sans-serif;color:var(--muted);padding-left:14px}.status-dot{display:inline-block;width:6px;height:6px;background:#75a057;border-radius:50%;margin-right:7px}.settings{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 0;display:flex;align-items:center;gap:25px;margin-bottom:25px}.setting{display:flex;flex-direction:column;min-width:0}.setting label{color:var(--muted);font-size:10px;letter-spacing:1px}.text-button{background:transparent;border:0;font-size:11px;text-decoration:underline;text-underline-offset:4px;padding:0}.setting-note{font-size:10px;color:var(--muted);margin-left:auto;white-space:nowrap}.setting-note span{display:block;color:#94a197}.lab-layout{display:grid;grid-template-columns:160px minmax(0,1fr) 266px;gap:20px;align-items:start}.rail-title{font-size:11px;font-weight:600;display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding:9px 0 16px}.rail-title span{font-family:monospace;color:var(--muted)}#steps{padding-top:10px;display:flex;flex-direction:column;gap:3px}.step{display:flex;align-items:center;gap:10px;border:0;background:transparent;text-align:left;padding:8px 7px;font-size:12px;border-radius:6px}.step .number{font:11px monospace;color:#9aa79e;width:20px;flex:none}.step.active{background:#dfead4;color:#244b34;font-weight:650}.step.active .number{color:var(--teal)}.step.done .number{color:#6b9366}.step .step-dot{width:4px;height:4px;border-radius:50%;background:currentColor;margin-left:auto;opacity:0}.step.active .step-dot{opacity:1}.rail-bottom{font-size:10px;border-top:1px solid var(--line);color:var(--muted);margin-top:18px;padding-top:16px;line-height:2}.rail-bottom small{padding-left:14px;font-size:10px}.workbench{background:#fff;border:1px solid #d6dfd2;border-radius:12px;overflow:hidden;min-width:0;box-shadow:0 5px 20px #223a2410}.stage-heading{display:flex;align-items:center;justify-content:space-between;padding:18px 23px 15px;gap:10px}.stage-kicker{font:10px/1.3 ui-monospace,monospace;letter-spacing:1.3px;color:#869582}.stage-heading h2{font-size:19px;font-weight:650;margin-top:4px}.view-actions{display:flex;gap:5px;flex-shrink:0}.view-actions button{font-size:10px;padding:6px 8px;background:#f8faf5}.view-actions button[aria-pressed=true]{color:var(--teal);border-color:#bbcdb1}.scene-wrap{position:relative;background:#f6f8f1;border-top:1px solid #ecf0e7;border-bottom:1px solid #e7ecdf;overflow:hidden}#scene{width:100%;height:auto;aspect-ratio:1000/560;display:block}#scene text{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;fill:#24483e;font-size:15px}#scene .small{font-size:12px;fill:#657f70}#scene .label{font-size:17px;font-weight:600}#scene .tiny{font-size:10px;fill:#79907d}#scene .value{font-family:ui-monospace,monospace;font-weight:600}#scene .white{fill:white}#scene .accent{fill:#b1713d}.scene-caption{position:absolute;bottom:13px;left:22px;right:22px;display:flex;gap:8px;align-items:center;font-size:12px;color:#365442;min-height:32px;background:#fffffff2;border:1px solid #e1e8da;border-radius:6px;padding:6px 10px;backdrop-filter:blur(5px)}.live-dot{width:5px;height:5px;background:#7d9d61;border-radius:50%;flex:none}.scene-foot{padding:9px 18px;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:9px;color:#8c998d}.legend{display:flex;gap:12px;font-size:10px;flex-wrap:wrap}.legend span{display:flex;align-items:center;gap:4px;white-space:nowrap}.legend i{display:inline-block;width:6px;height:6px;border-radius:50%}.pesticide{background:#e2a044}.matrix{background:#719459}.sorbent{background:#8d8e7d}.transport{border-top:1px solid var(--line);padding:15px 19px;background:#fff}.transport-row{display:flex;align-items:center;gap:7px}.icon-button{font-size:17px;padding:6px 12px}.subtle{border-color:transparent;font-size:11px;padding:6px}.mode{font-size:11px;display:flex;align-items:center;gap:4px;margin-left:auto;white-space:nowrap}.mode input{accent-color:var(--teal)}.speed-label{font-size:10px;color:var(--muted);margin-left:4px}#speed{font-size:11px;padding:4px 0;width:48px}.seek-row{display:flex;gap:12px;align-items:center;margin-top:14px;font:10px monospace;color:var(--muted)}#seek{width:100%;min-width:0;accent-color:var(--teal);height:4px;cursor:pointer}.transport-hint{display:flex;justify-content:space-between;gap:10px;font-size:9px;color:#94a08f;margin-top:9px}.transport-hint span:first-child{color:var(--teal)}.guide{background:#fcfcf8;border:1px solid var(--line);padding:21px 21px 17px;border-radius:10px;min-height:565px}.guide-top{display:flex;align-items:center;justify-content:space-between}.guide-top .eyebrow{font-size:9px;letter-spacing:1.4px}.page-number{font:10px monospace;color:#9ba694}.guide h3{font-size:21px;line-height:1.4;margin:14px 0 20px;font-weight:600}.note-label{font-size:10px;letter-spacing:1.3px;color:#8a9a85;display:block;margin-bottom:5px}.note-block p{font-size:12px;line-height:1.95}.note-block{margin-bottom:20px}.parameter-block{background:#edf3e5;border:1px solid #dce8cf;padding:14px;margin:0 -5px 19px;border-radius:7px}.parameter-block .note-label{color:#6f8660}.param-row{display:flex;justify-content:space-between;gap:10px;font-size:11px;line-height:1.8;align-items:baseline;margin:5px 0}.param-row strong{font-size:14px;font-weight:650;white-space:nowrap;flex-shrink:0}.param-row small{font-size:10px;color:#798b6e}.real-timer{border-top:1px solid #d3dfc8;padding-top:8px;margin-top:8px;font:10px/1.8 ui-monospace,monospace;color:#637c52}.tip{padding:12px 0 12px 13px;border-left:2px solid #bfcb9e;background:linear-gradient(90deg,#f1f1df,transparent)}.tip>span{font-size:10px;font-weight:600;color:#868351}.tip p{font-size:11px;line-height:1.85;margin-top:4px}.branch-note{font-size:10px;line-height:1.9;color:#8a7654;margin-top:16px}.clause{font-size:9px;color:#a0aa98;border-top:1px solid var(--line);padding-top:12px;margin-top:18px}.summary-section{margin-top:49px}.section-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:24px;gap:20px}.section-heading h2{font-size:25px;margin-top:9px;font-weight:500;letter-spacing:-.5px}.section-heading p{font-size:11px;color:var(--muted)}.recipe-grid{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid #d6dfcf;border-radius:9px;overflow:hidden}.recipe-grid article{padding:23px;border-right:1px solid #d6dfcf;background:#f8f9f2}.recipe-grid article:last-child{border:0}.recipe-no{font:10px ui-monospace,monospace;color:#899782;letter-spacing:.5px}.recipe-grid h3{font-size:27px;font-family:var(--serif);font-weight:400;margin:15px 0 9px;letter-spacing:-1px}.recipe-grid p{font-size:11px;color:#7e8c77;line-height:1.85}.recipe-note{font-size:10px;color:var(--muted);margin-top:12px}.reference-section{margin-top:32px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}summary{cursor:pointer;font-size:13px;font-weight:600;padding:20px 0;list-style:none;display:flex;justify-content:space-between}summary::-webkit-details-marker{display:none}.reference-body{padding:0 0 22px;font-size:12px;color:#637661}.reference-body a{color:var(--teal);text-decoration:underline;text-underline-offset:3px}.reference-body h3{color:var(--ink);font-size:14px;margin:22px 0 8px}.reference-grid{display:grid;grid-template-columns:1fr 1fr;gap:35px}.targets{font-size:12px;color:#62775d;line-height:1.95}.targets p{margin:12px 0}.targets strong{color:var(--ink)}.next-chapter{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:36px 0 39px}.next-chapter h2{font-size:23px;font-weight:500;margin:8px 0}.next-chapter p{font-size:11px;color:var(--muted)}.next-chapter>a{padding:13px 18px;border:1px solid #aebf9f;border-radius:5px;font-size:12px;white-space:nowrap}.next-chapter>a span{margin-left:35px}footer{border-top:1px solid var(--line);margin:0 38px;padding:20px 0 25px;display:flex;justify-content:space-between;gap:15px;font-size:10px;color:#91a08a}dialog{border:1px solid var(--line);border-radius:14px;max-width:740px;width:calc(100% - 32px);padding:30px;color:var(--ink);background:#fafcf5;max-height:85vh;overflow:auto}dialog::backdrop{background:#14362999;backdrop-filter:blur(3px)}dialog h2{font-size:25px;font-weight:500;margin:12px 0}dialog>p{font-size:13px;margin-bottom:20px}.dialog-close{float:right;border:0;background:transparent;font-size:24px;padding:0 5px}dialog .primary{margin-top:18px}.workbench:fullscreen{border:0;border-radius:0;height:100dvh;background:#f6f8f1;display:flex;flex-direction:column;overflow:auto}.workbench:fullscreen .scene-wrap{flex:1;min-height:0;display:flex;justify-content:center}.workbench:fullscreen #scene{height:100%;width:auto;max-width:100%}.workbench:fullscreen .scene-foot,.workbench:fullscreen .transport{flex-shrink:0}.workbench:fullscreen .stage-heading{flex-shrink:0}
@media(min-width:1500px){.lab-layout{grid-template-columns:175px minmax(0,1fr) 290px}.guide{padding:25px}.stage-heading h2{font-size:22px}.note-block p{font-size:13px}.param-row{font-size:12px}.guide h3{font-size:24px}}
@media(max-width:1150px){main{padding:0 22px}.masthead,footer{margin-left:22px;margin-right:22px}.lab-layout{grid-template-columns:128px minmax(0,1fr) 236px;gap:12px}.guide{padding:17px}.guide h3{font-size:19px}.stage-heading{padding:15px}.stage-heading h2{font-size:17px}.transport{padding:12px}.transport-row{flex-wrap:wrap}.mode{margin-left:0}.transport button.primary{min-width:110px;padding:9px 12px}.scene-foot{flex-direction:column;align-items:start;gap:3px}.settings{gap:16px}.setting-note{display:none}.step{font-size:11px;gap:6px}.recipe-grid article{padding:18px}.recipe-grid h3{font-size:24px}}
@media(max-width:900px){.lab-layout{grid-template-columns:minmax(0,1fr) 240px}.steps-panel{grid-column:1/-1}.rail-title,.rail-bottom{display:none}#steps{flex-direction:row;overflow-x:auto;padding:0 0 7px;gap:5px}.step{flex-shrink:0;border:1px solid var(--line);font-size:11px;padding:8px}.step .number{width:auto}.step-dot{display:none}.intro{padding-top:26px;gap:15px}h1 span{display:block;margin:0;font-size:29px}.standard{font-size:10px}.guide{min-height:0}.scene-caption{font-size:11px;left:12px;right:12px;bottom:9px}.section-heading h2{font-size:22px}}
@media(max-width:680px){.masthead{height:65px;margin:0 16px}.brand{font-size:10px;gap:8px}.brand-mark{font-size:30px}.brand-sub{font-size:9px;letter-spacing:1px}.back{font-size:10px}main{padding:0 14px}.intro{padding:23px 0 20px;display:block}h1{font-size:28px;line-height:1.35;margin:8px 0}h1 span{display:inline;font-size:25px;margin-left:10px}.intro .eyebrow{font-size:8px;letter-spacing:1px}.intro p{font-size:11px;margin-top:10px}.standard{display:inline-block;font-size:9px;margin-top:16px;padding:5px 9px}.standard>span:last-child{display:none}.settings{flex-wrap:wrap;gap:10px 16px;padding:13px 0;margin-bottom:14px}.setting{flex:1 1 42%;font-size:11px}.setting label{font-size:9px}.text-button{font-size:10px}.lab-layout{display:block}.steps-panel{margin-bottom:8px}.workbench{border-radius:9px}.stage-heading{padding:12px}.stage-heading h2{font-size:17px}.stage-kicker{font-size:9px}.view-actions button{font-size:9px;padding:6px}.view-actions #fullscreen span{display:none}#scene{aspect-ratio:1.3;min-height:290px}.scene-caption{font-size:10px;padding:5px 8px;min-height:29px;line-height:1.5}.scene-foot{padding:8px 12px;font-size:8px}.legend{font-size:9px}.transport-row{gap:4px}.transport button.primary{font-size:12px;min-width:110px;padding:9px 11px}.icon-button{padding:6px 10px}.subtle{font-size:10px}.mode{font-size:10px;margin-left:auto}.speed-label{display:none}#speed{font-size:10px;width:43px}.transport-hint{font-size:8px}.guide{margin-top:13px;padding:20px;display:grid;grid-template-columns:1fr 1fr;gap:10px 20px}.guide-top,.guide h3,.tip,.branch-note,.clause{grid-column:1/-1}.guide h3{font-size:22px;margin:0 0 4px}.note-block{margin-bottom:6px}.note-block p{font-size:12px}.parameter-block{margin:0;grid-column:2;grid-row:3/5;padding:12px;align-self:start}.tip{margin-top:3px}.tip p{font-size:11px}.branch-note{margin-top:0}.clause{margin-top:0}.summary-section{margin-top:33px}.section-heading{display:block;margin-bottom:18px}.section-heading h2{font-size:22px;margin:7px 0}.section-heading p{font-size:10px;margin-top:9px}.recipe-grid{grid-template-columns:1fr 1fr}.recipe-grid article{padding:17px 14px}.recipe-grid article:nth-child(2){border-right:0}.recipe-grid article:nth-child(-n+2){border-bottom:1px solid #d6dfcf}.recipe-grid h3{font-size:23px;margin:11px 0 8px}.recipe-grid p{font-size:10px}.recipe-no{font-size:8px}.recipe-note{font-size:9px}.reference-grid{grid-template-columns:1fr;gap:0}.reference-body{font-size:11px}.next-chapter{display:block;padding:28px 0}.next-chapter h2{font-size:21px}.next-chapter p{font-size:10px}.next-chapter>a{display:inline-block;margin-top:18px;font-size:11px}footer{margin:0 16px;flex-direction:column;font-size:9px;gap:5px}dialog{padding:22px}dialog h2{font-size:22px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Captions occupy their own row so they never cover tube tips or labels. */
.scene-wrap .scene-caption{position:relative;left:auto;right:auto;bottom:auto;margin:0 14px 12px;flex:none}
.workbench:fullscreen .scene-wrap{flex-direction:column;align-items:center}
.workbench:fullscreen #scene{flex:1;min-height:0;width:100%}
.workbench:fullscreen .scene-caption{align-self:stretch}

.mobile-readout{display:none}
@media(max-width:680px){.mobile-readout{display:flex;gap:5px 12px;flex-wrap:wrap;padding:8px 12px;background:#edf3e5;color:#637a59;font-size:10px;border-top:1px solid #e2ead9}.mobile-readout b{color:#254d3b;font-weight:650}#scene text{display:none}#scene text.value{display:initial}.settings .setting{flex-basis:100%}.settings .setting select{width:100%}.scene-wrap #scene{aspect-ratio:1.1;min-height:310px}.workbench:fullscreen #scene{min-height:0}}

@media(max-width:680px){#scene .annotation{display:none}}