@charset "UTF-8";
:root{--paper:#f9faf6;--white:#fff;--ink:#193b34;--muted:#61716a;--line:#dce4db;--lime:#dbf37d;--green:#1d5846;--soft:#eff3e9;--orange:#f3b971;--radius:20px;font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;scroll-behavior:smooth;scroll-padding-top:100px}
*{box-sizing:border-box}body{margin:0;font-size:16px;line-height:1.65}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.6}a{color:inherit;text-decoration:none}button{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #528b43;outline-offset:4px}button{border:0}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.3}svg{display:block;max-width:100%}.wrap{max-width:1240px;margin:auto;padding:0 36px}.skip{position:fixed;top:-100px;background:var(--ink);color:white;padding:12px;z-index:100}.skip:focus{top:0}
header{position:sticky;top:0;z-index:10;background:rgba(249,250,246,.95);border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}.nav{height:88px;display:flex;align-items:center;gap:32px}.brand{display:flex;align-items:center;gap:12px;margin-right:auto}.brand-mark{background:var(--ink);color:var(--lime);height:42px;width:42px;border-radius:12px;display:grid;place-items:center}.brand-name{font-size:21px;font-weight:800;letter-spacing:1px}.brand small{display:block;font-size:10px;letter-spacing:2.1px;font-weight:600;line-height:1.3}.nav-links{display:flex;align-items:center;gap:28px;font-size:14px;font-weight:600}.nav-links a:hover{color:#578539}.nav-actions{display:flex;align-items:center;gap:18px}.lang{background:transparent;white-space:nowrap;font-size:14px;padding:8px 0}.lang .dim{color:#87938d}.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;border-radius:9px;padding:13px 21px;font-size:15px;font-weight:600;border:1px solid transparent;transition:transform .18s,background .18s}.btn:hover{transform:translateY(-2px)}.btn.primary{background:var(--ink);color:#fff}.btn.primary:hover{background:#285e4d}.btn.secondary{background:transparent;border-color:#cbd6c8}.btn.lime{background:var(--lime);color:var(--ink)}.btn.small{padding:9px 15px;font-size:14px}.icon{width:20px;height:20px;flex-shrink:0;display:inline-block}.icon-button{background:transparent;padding:8px;border-radius:9px}.icon-button:hover{background:var(--soft)}
.hero{padding-top:54px;padding-bottom:50px;display:grid;grid-template-columns:1.04fr 1fr;gap:55px;align-items:center}.eyebrow{display:flex;gap:9px;align-items:center;font-size:12px;font-weight:700;letter-spacing:2px;color:#65795d;margin-bottom:23px}.eyebrow:before{content:"";width:24px;height:1px;background:#78915e}.hero h1{font-size:clamp(34px,3.6vw,50px);font-weight:800;letter-spacing:-1.5px;line-height:1.38}.hero h1 em{font-style:normal;position:relative;z-index:0;white-space:nowrap}.hero h1 em:after{content:"";position:absolute;bottom:4px;left:-2px;right:-5px;height:13px;background:var(--lime);z-index:-1;transform:rotate(-1.5deg)}.hero-copy{color:var(--muted);font-size:16px;line-height:1.85;max-width:430px;margin-top:19px}.hero-actions{display:flex;gap:13px;margin-top:27px;flex-wrap:wrap}.hero-facts{display:flex;gap:24px;margin-top:28px;font-size:13px;color:var(--muted)}.hero-facts span{display:flex;align-items:center;gap:7px}.hero-facts .icon{width:15px;height:15px}.lab-panel{border:1px solid #d3dece;border-radius:22px;background-color:#edf2e6;background-image:radial-gradient(#c9d5bd .75px,transparent .75px);background-size:16px 16px;padding:22px 25px 17px;position:relative;overflow:hidden}.lab-top{display:flex;justify-content:space-between;align-items:center;font-size:12px;letter-spacing:1px}.lab-top b{font-size:11px;display:inline-block;background:white;border:1px solid #d4dfcc;padding:4px 9px;border-radius:5px;font-weight:500;letter-spacing:0}.lab-title{font-size:15px;font-weight:700;margin-top:9px}.circuit{width:100%;height:206px;overflow:visible}.circuit .wire{stroke:#57765b;stroke-width:2.3;fill:none;stroke-linecap:round;stroke-linejoin:round}.circuit text{font-family:inherit;font-size:12px;fill:#61735c}.circuit .label{font-size:10px}.circuit .led-light{fill:#d2d9c7;stroke:#8b9a77;stroke-width:2;transition:fill .25s,filter .25s}.lab-panel.on .led-light{fill:#dbf778;stroke:#547b35;filter:drop-shadow(0 0 15px #bde542)}.lab-panel.on .flow-line{stroke:#72a24e;stroke-dasharray:7 9;animation:flow 1.2s linear infinite}.flow-line{fill:none;stroke:transparent;stroke-width:3}.lab-control{display:flex;align-items:center;justify-content:space-between;gap:10px;background:rgba(255,255,255,.8);border:1px solid #d3ddc9;padding:11px 13px;border-radius:11px}.lab-control p{font-size:13px;font-weight:600}.lab-control small{font-size:11px;color:var(--muted)}.switch{width:46px;height:26px;flex:0 0 46px;padding:3px;background:#b3bdaa;border-radius:20px;position:relative}.switch:after{content:"";display:block;width:20px;height:20px;background:white;border-radius:50%;box-shadow:0 1px 3px #0002;transition:transform .2s}.switch[aria-checked=true]{background:#315f3f}.switch[aria-checked=true]:after{transform:translateX(20px)}.lab-caption{font-size:11px;color:#718166;text-align:right;margin-top:9px}.stat-row{border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:grid;grid-template-columns:repeat(3,1fr);padding:23px 0;margin-bottom:60px}.stat{display:flex;align-items:center;justify-content:center;gap:17px;border-right:1px solid var(--line)}.stat:last-child{border:0}.stat b{font-size:25px;font-weight:650}.stat span{font-size:13px;color:var(--muted);line-height:1.6}.stat .icon{height:26px;width:26px;color:#678156}
.section{padding-bottom:70px;scroll-margin-top:110px}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:25px}.overline{font-size:11px;letter-spacing:2px;color:#839077;margin-bottom:9px;font-weight:700}.section h2{font-size:28px;letter-spacing:-.5px}.section-sub{font-size:14px;color:var(--muted);margin-top:9px}.section-meta{font-size:13px;color:var(--muted);white-space:nowrap}.filters{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:25px}.filter-tabs{display:flex;gap:6px;flex-wrap:wrap}.chip{background:transparent;padding:8px 15px;font-size:14px;border:1px solid var(--line);border-radius:30px;white-space:nowrap}.chip.active{background:var(--ink);color:white;border-color:var(--ink)}.chip:hover:not(.active){background:#eaf0e2}.search{position:relative;max-width:240px}.search input{width:100%;padding:10px 14px 10px 39px;border:1px solid var(--line);border-radius:9px;background:transparent;font-size:14px;color:var(--ink)}.search .icon{position:absolute;left:12px;top:12px;width:17px;height:17px;color:#84917d}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.project-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--white);overflow:hidden;transition:transform .22s,box-shadow .22s}.project-card:hover{transform:translateY(-5px);box-shadow:0 15px 25px #193b3409}.card-art{height:178px;padding:18px 20px;position:relative;overflow:hidden;background:var(--card-bg,#eef3e6);background-image:radial-gradient(#526b3922 .7px,transparent .7px);background-size:14px 14px}.card-top{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:#6c7e61}.card-top .number{font-family:Consolas,monospace;letter-spacing:2px}.card-level{background:#ffffffab;border:1px solid #ffffffbd;border-radius:5px;padding:3px 8px}.card-diagram{height:105px;width:100%;margin-top:9px}.card-diagram text{font-family:inherit;fill:#4f6b55;font-size:11px}.card-diagram .block{fill:#ffffffa8;stroke:#8da482;stroke-width:1.3}.card-diagram .path{fill:none;stroke:#78916a;stroke-width:1.6}.card-diagram.real-diagram{object-fit:contain;background:#fff;border:1px solid #dfe7d9;border-radius:8px;padding:4px}.card-body{padding:22px 22px 17px}.card-body h3{font-size:19px;letter-spacing:-.2px}.card-desc{font-size:14px;line-height:1.7;color:var(--muted);margin-top:9px;min-height:48px}.card-tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:16px}.tag{font-size:11px;padding:3px 7px;background:#f2f5ee;color:#6f7f62;border-radius:4px}.card-bottom{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #edf0e9;margin-top:17px;padding-top:14px}.budget{font-size:12px;color:#6e7b64}.budget strong{color:#3b5b40;font-size:15px}.card-open{background:none;display:flex;align-items:center;gap:5px;font-size:13px;font-weight:600;padding:5px 0}.card-open .icon{width:17px}.empty{grid-column:1/-1;padding:60px 20px;text-align:center;background:var(--soft);border-radius:18px}.empty button{margin-top:18px}.project-note{margin-top:19px;font-size:12px;color:#75816c;display:flex;gap:8px;align-items:flex-start}.project-note .icon{width:16px;height:16px;margin-top:2px;flex-shrink:0}
.starter-strip{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:32px;background:var(--ink);color:#fff;padding:34px;border-radius:22px;margin:0 0 64px}.starter-strip h2{font-size:23px}.starter-strip p{font-size:14px;color:#c0cec5;margin-top:12px;line-height:1.8}.starter-strip .step-label{font-size:11px;color:var(--lime);letter-spacing:2px;margin-bottom:10px}.starter-strip h3{font-size:17px}.starter-strip button{background:transparent;border:0;color:var(--lime);padding:10px 0 0;font-size:14px}.tools-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.tool{padding:23px;border:1px solid var(--line);background:#fff;border-radius:14px}.tool-symbol{width:42px;height:42px;border-radius:12px;background:var(--soft);display:grid;place-items:center;margin-bottom:16px}.tool h3{font-size:16px}.tool p{font-size:13px;line-height:1.8;color:var(--muted);margin-top:8px}.tool small{display:block;color:#7b8b6f;font-size:11px;margin-top:12px}.tool-link{font-size:13px;color:#366b4e;border-bottom:1px solid #a8bb9d}.resource-row{margin-top:18px;display:flex;gap:25px;align-items:center;flex-wrap:wrap;font-size:13px;color:var(--muted)}.resource-row a{text-decoration:underline;text-underline-offset:4px}.glossary-section{border-top:1px solid var(--line);padding-top:38px}.terms-cloud{display:flex;gap:10px;flex-wrap:wrap}.term-pill{padding:10px 16px;background:white;border:1px solid var(--line);border-radius:9px;font-size:14px}.term-pill:hover{background:var(--soft)}.term-pill small{color:#7e8b76;font-size:12px;margin-left:9px}.term-link{font:inherit;background:transparent;padding:0;color:#326a46;border-bottom:1px dashed #749958;cursor:help}.community{display:flex;align-items:center;justify-content:space-between;gap:30px;border:1px solid #ccd9bc;background:#edf3e3;border-radius:20px;padding:32px;margin-bottom:60px}.community h2{font-size:23px}.community p{font-size:14px;color:var(--muted);max-width:680px;margin-top:10px}.sources{padding:29px 0 38px;border-top:1px solid var(--line)}.sources summary{font-weight:600;font-size:14px;cursor:pointer}.sources p{font-size:13px;color:var(--muted);margin:12px 0}.source-links{display:flex;gap:12px 24px;flex-wrap:wrap;font-size:13px;text-decoration:underline;text-underline-offset:4px}footer{background:#eef2e9;border-top:1px solid var(--line);padding:28px 0}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:12px;color:var(--muted)}.footer-inner .brand-name{font-size:15px;color:var(--ink)}.footer-inner p{margin-top:5px}
dialog{border:1px solid #d9e0d3;border-radius:22px;padding:0;color:var(--ink);background:var(--paper);max-height:90dvh;width:min(920px,calc(100% - 40px));box-shadow:0 30px 100px #09271e44}dialog::backdrop{background:#152f2999;backdrop-filter:blur(5px)}body:has(dialog[open]){overflow:hidden}.dialog-top{position:sticky;top:0;background:var(--paper);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:13px 26px;z-index:2;font-size:12px;color:var(--muted)}.dialog-top .icon-button{font-size:22px;padding:0 10px}.detail-hero{padding:29px 36px;background:#eff3e6;border-bottom:1px solid var(--line)}.detail-hero .overline{margin-bottom:10px}.detail-hero h2{font-size:29px;margin-bottom:10px}.detail-hero p{font-size:16px;color:#53694f;max-width:730px}.detail-info{display:flex;gap:12px;flex-wrap:wrap;margin-top:19px}.detail-info span{background:#ffffffa8;border-radius:5px;padding:4px 9px;font-size:12px}.detail-body{padding:27px 36px 35px}.detail-body h3{font-size:19px;margin-bottom:11px}.detail-body section{margin-bottom:30px}.detail-body p{color:#53695c;font-size:15px;line-height:1.9;margin-bottom:12px}.status-note{border-left:3px solid #b6c86e;padding:5px 0 5px 15px;margin-bottom:25px;font-size:14px;color:#647157}.table-scroll{overflow:auto;border:1px solid var(--line);border-radius:10px}table{border-collapse:collapse;width:100%;font-size:14px;background:#fff}th,td{text-align:left;padding:11px 13px;border-bottom:1px solid #e6ebdf;vertical-align:top}th{background:#edf2e7;font-weight:600;white-space:nowrap}tr:last-child td{border-bottom:0}.cost-note{font-size:12px!important;margin-top:10px}.steps{list-style:none;padding:0;margin:0;counter-reset:step}.steps li{display:flex;align-items:flex-start;gap:13px;padding:13px 0;border-bottom:1px solid var(--line);font-size:15px;color:#506459}.step-check{width:24px;height:24px;flex-shrink:0;margin-top:1px;accent-color:var(--green);cursor:pointer}.steps label{cursor:pointer}.steps li:has(input:checked) label{color:#819079;text-decoration:line-through}.step-number{display:block;color:#80936d;font-size:11px;margin-bottom:3px;letter-spacing:1px}.step-progress{font-size:12px;color:#728566;margin-top:10px}.faq{border-bottom:1px solid var(--line);padding:13px 0}.faq summary{font-size:15px;font-weight:600;cursor:pointer}.faq p{margin:10px 0 0}.detail-footer{display:flex;gap:12px;flex-wrap:wrap;justify-content:space-between;margin-top:20px;padding-top:20px;border-top:1px solid var(--line)}.mini-diagram{border:1px solid var(--line);border-radius:12px;padding:18px;background:#f2f6eb;margin:16px 0}.mini-diagram .card-diagram{height:120px}.mini-diagram .card-diagram.real-diagram{height:230px;background:#fff;padding:8px}.mini-diagram small{font-size:12px;color:#6c7e62}.detail-links{display:flex;gap:12px;flex-wrap:wrap;font-size:13px}.detail-links a{color:#376f4c;text-decoration:underline;overflow-wrap:anywhere}#terms{width:min(450px,calc(100% - 32px));padding:29px}#terms h2{font-size:23px}#terms .term-en{font-size:13px;color:#7b8a71;margin-top:5px}#terms .term-definition{font-size:16px;line-height:1.9;margin-top:18px}#terms .term-example{font-size:14px;color:#6a7e5f;margin-top:13px}#terms .close-term{position:absolute;top:12px;right:12px}#submission{width:min(720px,calc(100% - 32px))}.form-body{padding:28px 32px}.form-body h2{font-size:27px}.form-intro{font-size:14px;color:var(--muted);margin:12px 0 22px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px}.field{display:flex;flex-direction:column;gap:6px;font-size:14px}.field.full{grid-column:1/-1}.field input,.field textarea,.field select{padding:11px 12px;width:100%;border:1px solid #cdd8c6;border-radius:8px;background:white;color:var(--ink)}.field textarea{resize:vertical;min-height:90px}.field small{font-size:12px;color:var(--muted)}.form-actions{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}.file-preview{display:flex;gap:9px;flex-wrap:wrap}.file-preview img{height:70px;width:90px;object-fit:cover;border-radius:7px}.form-result{margin-top:14px;font-size:14px;color:#326344}#toast{position:fixed;bottom:26px;left:50%;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:var(--ink);color:white;padding:12px 20px;border-radius:9px;z-index:50;max-width:calc(100% - 30px);font-size:14px;transition:opacity .2s,transform .2s}#toast.show{opacity:1;transform:translate(-50%,0)}.calculator{margin-top:20px;border:1px solid var(--line);border-radius:12px;padding:18px;background:white}.calculator summary{cursor:pointer;font-size:14px;font-weight:600}.calc-fields{display:flex;gap:12px;margin-top:16px;flex-wrap:wrap}.calc-fields label{font-size:13px;flex:1;min-width:120px}.calc-fields input{display:block;width:100%;padding:8px;border:1px solid var(--line);border-radius:6px;margin-top:5px}.calc-output{margin-top:14px;font-size:15px}.calculator small{font-size:12px;color:var(--muted);display:block;margin-top:9px}@keyframes flow{to{stroke-dashoffset:-32}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
@media(min-width:1500px){.hero{gap:80px}.hero h1{font-size:52px}}
.observe-list{padding-left:22px;color:#506459;font-size:15px;line-height:1.9}.observe-list li{margin-bottom:12px}.form-actions{align-items:center}.brand-name{overflow-wrap:normal}
@media(max-width:1000px){.nav-links{gap:17px}.nav{gap:20px}.nav-actions{gap:10px}.hero{gap:30px}.hero h1{font-size:37px}.grid{gap:17px}.card-body{padding:18px}.tools-grid{grid-template-columns:repeat(2,1fr)}.brand-name{font-size:19px}.nav-links a:last-child{display:none}.wrap{padding:0 25px}.hero{padding-top:40px;padding-bottom:35px}.stat-row{margin-bottom:45px}}
@media(max-width:760px){.wrap{padding-left:20px;padding-right:20px}.nav{height:74px;gap:12px}.nav-links{display:none}.brand{gap:8px}.brand-mark{width:34px;height:34px;border-radius:9px}.brand-name{font-size:18px}.brand small{font-size:8px;letter-spacing:1.5px}.nav-actions{gap:10px}.nav-actions .btn{padding:8px 10px;font-size:12px}.nav-actions .btn .icon{display:none}.lang{font-size:12px}.hero{grid-template-columns:1fr;gap:30px;padding-top:33px;padding-bottom:30px}.hero h1{font-size:37px;letter-spacing:-1px}.hero-copy{max-width:none;font-size:15px}.eyebrow{margin-bottom:16px;font-size:11px}.hero-actions{margin-top:22px}.hero-facts{margin-top:21px}.lab-panel{max-width:600px;width:100%;padding:17px 20px}.lab-title{margin-top:6px}.circuit{height:185px}.stat-row{padding:18px 0;margin-bottom:38px}.stat{gap:7px;flex-wrap:wrap;text-align:center;padding:0 9px}.stat .icon{display:none}.stat b{font-size:22px}.stat span{font-size:11px}.section-head{align-items:flex-start}.section h2{font-size:25px}.section-sub{font-size:13px}.section-meta{font-size:11px}.filters{flex-wrap:wrap;gap:15px}.search{max-width:none;width:100%}.filter-tabs{gap:5px}.chip{padding:7px 11px;font-size:12px}.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.card-art{height:150px;padding:14px}.card-body{padding:16px}.card-body h3{font-size:17px}.card-desc{font-size:13px}.card-bottom{gap:6px}.budget{font-size:11px}.budget strong{font-size:12px}.card-open{font-size:12px}.card-diagram{height:90px}.starter-strip{grid-template-columns:1fr;gap:24px;padding:25px;margin-bottom:45px}.section{padding-bottom:45px}.community{padding:25px;display:block;margin-bottom:40px}.community .btn{margin-top:20px}.community h2{font-size:21px}.footer-inner{align-items:flex-start;flex-direction:column}.detail-body{padding:24px}.detail-hero{padding:24px}.detail-hero h2{font-size:25px}.detail-body p{font-size:14px}.form-body{padding:24px}.form-grid{grid-template-columns:1fr}.term-pill{font-size:13px}.term-pill small{font-size:11px}.resource-row{gap:13px}}
@media(max-width:450px){.grid{grid-template-columns:1fr}.card-art{height:165px}.card-diagram{height:105px}.card-desc{min-height:0}.card-body h3{font-size:19px}.card-bottom .budget strong{font-size:14px}.tools-grid{grid-template-columns:1fr 1fr;gap:10px}.tool{padding:16px}.tool h3{font-size:15px}.tool p{font-size:12px}.hero h1{font-size:33px}.hero-facts{gap:13px;font-size:12px}.hero .btn{font-size:14px;padding:11px 16px}.section-meta{display:none}.detail-body,.detail-hero{padding:20px}.detail-body table{font-size:12px}td,th{padding:9px}.stat{display:block}.stat span{display:block}.nav-actions .btn{padding:7px}.brand{gap:7px}.nav{gap:7px}.nav-actions{gap:8px}}