*{box-sizing:border-box} :root{color-scheme:light;--paper:#f7f4e9;--ink:#292e32;--muted:#6f7474;--orange:#e65b34;--blue:#335fc5;--line:#c8cac0;--zero:#858c86}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",sans-serif;-webkit-font-smoothing:antialiased}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;color:inherit}button:focus-visible,a:focus-visible{outline:3px solid var(--blue);outline-offset:4px}button{touch-action:manipulation}button:active{transform:translateY(1px)}a{color:inherit}.page{max-width:1360px;padding:0 44px;margin:auto}.masthead{min-height:80px;border-bottom:1px solid #b5b9ae;display:flex;justify-content:space-between;align-items:center;gap:16px}.back{font-size:16px;font-weight:600;text-decoration:none;line-height:1.6}.info-button{font-size:14px;border:0;background:none;min-height:44px;padding:0 2px}.intro{padding:35px 0 30px;display:flex;align-items:center;justify-content:space-between;gap:20px}.eyebrow{margin:0 0 10px;font-size:15px;letter-spacing:2px;color:#737a76}h1{margin:0;font-size:clamp(32px,4.2vw,55px);font-weight:700;letter-spacing:-1.5px;line-height:1.3}h1>span{color:var(--orange)}.intro-mark{display:flex;gap:17px;align-items:center;font:26px ui-monospace,monospace;color:var(--orange)}.intro-mark>span{height:48px;width:48px;border:1px solid currentColor;display:grid;place-content:center;border-radius:8px;transform:rotate(-7deg)}.intro-mark>span:last-child{transform:rotate(7deg);background:var(--orange);color:var(--paper)}.intro-mark>i{font-style:normal}.workbench{border:1px solid #b9bdb0;border-radius:13px;overflow:hidden;background:#eeeddf;box-shadow:0 6px 0 #deded1}.board-heading{height:48px;margin:0 26px;border-bottom:1px solid #cbcec1;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12px;letter-spacing:1px}.board-title{font-weight:600}.signal-key{display:flex;gap:8px;align-items:center;font:13px ui-monospace,monospace}.signal-key>i{height:5px;width:22px;border-radius:3px;display:inline-block}.key-one{background:var(--orange)}.key-zero{background:repeating-linear-gradient(to right,#858c86 0 5px,transparent 5px 8px);margin-left:5px}.scene{position:relative;height:340px;background-image:radial-gradient(#bdc1b3 1px,transparent 1px);background-size:18px 18px;isolation:isolate}.wires{position:absolute;inset:0;width:100%;height:100%;z-index:0;pointer-events:none;overflow:visible}.wire-base{fill:none;stroke:#eeeddf;stroke-width:12px;stroke-linejoin:round;stroke-linecap:round}.wire-state{fill:none;stroke:var(--zero);stroke-width:4px;stroke-linejoin:round;stroke-linecap:round;stroke-dasharray:5 7}.wire-on .wire-state{stroke:var(--orange);stroke-width:5px;stroke-dasharray:none}.wire-blue.wire-on .wire-state{stroke:var(--blue)}.input-block,.gate-cluster,.invert-block,.output-block{position:absolute;z-index:1}.input-block{left:5.5%;width:145px;height:103px;border:1px solid #a9aea2;border-radius:10px;background:#faf9f0;box-shadow:0 6px 0 #c7cabe;text-align:center;padding:9px 12px 7px;transition:box-shadow .16s,background .16s}.input-block:hover{background:#fffdf6;box-shadow:0 6px 0 #b0b7a8}.input-block.is-on{border-color:#c77357;box-shadow:0 6px 0 #c5a08e}#input-a{top:35px}#input-b{top:201px}.input-top{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--muted)}.input-top>b{display:grid;place-items:center;background:#e8e8dc;color:#424a42;width:25px;height:25px;border-radius:5px;font:bold 16px ui-monospace,monospace}.input-value{font:600 16px ui-monospace,monospace;padding-left:4px;color:#5d685e}.is-on .input-value{color:var(--orange)}.lever{margin:5px auto 2px;position:relative;display:flex;justify-content:space-between;align-items:center;width:91px;height:31px;border-radius:5px;background:#3c4642;color:#bdc3b9;box-shadow:inset 0 2px 5px #0005;font:12px ui-monospace,monospace;padding:0 14px}.lever>i{position:absolute;top:3px;left:3px;width:41px;height:25px;border-radius:3px;background:linear-gradient(#fdfcf5,#c0c5b8);box-shadow:0 2px 4px #0008;transition:transform .15s}.lever>i:after{content:"";position:absolute;inset:7px 16px;border-left:1px solid #879286;border-right:1px solid #879286}.is-on .lever>i{transform:translateX(44px);background:linear-gradient(#f8ac7e,#e65b34)}.tap-label{font-size:10px;letter-spacing:1px;color:#777e73}.port{position:absolute;width:11px;height:11px;border:2px solid #f7f4e9;border-radius:50%;background:#8c9488;z-index:3;box-shadow:0 0 0 1px #8c9488;pointer-events:none}.port.is-on{background:var(--orange);box-shadow:0 0 0 1px var(--orange)}.input-port{right:-6px;top:calc(50% - 5px)}.port>i{position:absolute;display:block;min-width:21px;height:20px;line-height:20px;text-align:center;border-radius:3px;font:600 12px/20px ui-monospace,monospace;font-style:normal;background:#eeeddf;color:#596356;top:-7px;left:-31px}.port.is-on>i{color:var(--orange)}.gate-cluster{left:30%;top:65px;width:180px;text-align:center}.gate-block{position:relative;height:139px;background:var(--orange);color:#fff9ec;border:1px solid #a93e21;border-radius:11px;box-shadow:0 7px 0 #af4729,0 10px 0 #d0c3a8;display:flex;align-items:center;flex-direction:column;padding:13px 4px 10px}.gate-block:after,.gate-block:before{content:"";position:absolute;top:9px;width:5px;height:5px;border:1px solid #993d23;border-radius:50%;background:#eab082}.gate-block:before{left:9px}.gate-block:after{right:9px}#gate-symbol{width:67px;height:45px;fill:none;stroke:currentColor;stroke-width:2.7;stroke-linejoin:round}.gate-block>strong{font-size:21px;letter-spacing:3px;margin:2px 0 4px}.gate-rule{font-size:11px;line-height:1.6}.gate-input-a{left:-6px;top:28%}.gate-input-b{left:-6px;top:69%}.gate-output{right:-6px;top:calc(50% - 5px)}.gate-output>i{left:17px}.gate-choices{display:flex;gap:7px;margin-top:17px}.gate-choices>button{width:50%;min-height:44px;border-radius:5px;background:#f9f7ec;border:1px solid #aeb4a6;font-size:13px}.gate-choices>button[aria-pressed=true]{border-color:var(--orange);color:#ac3e22;background:#ffead9;box-shadow:inset 0 -3px 0 #e65b3455}.gate-choices>button:hover{border-color:var(--orange)}.swap-label{font-size:10px;color:#7d8277;display:inline-block;padding-top:7px}.invert-block{left:59%;top:65px;width:143px;height:139px;border:2px dashed #97a69d;background:#e9ebe0;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:5px;box-shadow:0 5px 0 #c7cfc0;padding:5px}.invert-block:hover{border-color:var(--blue);background:#e6e9eb}.invert-symbol{font-size:27px;line-height:1}.invert-block>strong{font-size:15px;letter-spacing:1px}.invert-equation{font:14px ui-monospace,monospace}.invert-note{font-size:10px;color:#6b7770}.invert-block[aria-pressed=true]{background:var(--blue);color:#fff9ec;border:1px solid #25479a;box-shadow:0 7px 0 #27438d,0 10px 0 #bfc6be}.invert-block[aria-pressed=true] .invert-note{color:#d9e3ff}.invert-input{left:-6px;top:calc(50% - 5px)}.invert-input>i{left:-29px}.invert-output{right:-6px;top:calc(50% - 5px)}.invert-output>i{left:17px}.invert-block[aria-pressed=true] .invert-output.is-on{background:var(--blue);box-shadow:0 0 0 1px var(--blue)}.invert-block[aria-pressed=true] .invert-output.is-on>i{color:var(--blue)}.output-block{left:82%;top:68px;width:129px;height:155px;display:flex;align-items:center;flex-direction:column;padding-top:18px}.lamp-port{left:-5px;top:calc(43% - 5px)}.lamp{width:91px;height:91px;border-radius:50%;border:6px solid #d8d9c9;background:radial-gradient(circle at 37% 28%,#fbfcf2,#d7dcc8);box-shadow:0 3px 0 #8d9587,inset 0 0 0 1px #b0b8a2;display:grid;place-content:center}.lamp>span{font-size:50px;line-height:1;color:#b1baa6;transform:rotate(15deg)}.output-block.is-on .lamp{background:radial-gradient(circle at 35% 30%,#fff8b6,#ffb646 65%,#ec812f);border-color:#e6c88b;box-shadow:0 3px 0 #a18252,0 0 38px #ffbc4950,inset 0 0 0 1px #ffd470}.output-block.is-on .lamp>span{color:#e06e21}.output-copy{margin-top:14px;text-align:center;display:flex;align-items:center;gap:10px}.output-copy>span{font-size:11px;color:#737c6b}.output-copy strong{font:600 17px ui-monospace,monospace;color:#586350;margin-left:3px}.output-copy>b{font-size:14px}.output-block.is-on .output-copy strong{color:#c25722}.board-stamp{position:absolute;right:23px;bottom:18px;font-size:10px;color:#828b7a;letter-spacing:2px}.state-strip{min-height:61px;background:#f9f7ed;border-top:1px solid #cbcec1;display:flex;align-items:center;justify-content:space-between;gap:15px;padding:9px 24px}.equation{font:13px/1.8 "Microsoft YaHei",sans-serif;color:#454f46}.equation>i{font-style:normal;color:#8d9788;padding:0 9px}.reset-button{border:1px solid #bac1b2;background:none;min-height:40px;padding:0 12px;border-radius:5px;font-size:12px;white-space:nowrap}.action-status{font-size:12px;color:#687260;padding:19px 1px 24px;min-height:62px;line-height:1.8}.results-area{display:grid;grid-template-columns:1.1fr 1fr;gap:40px}.panel-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding-bottom:14px}.panel-heading h2{font-size:17px;font-weight:600;margin:0;white-space:nowrap}.panel-heading>span{font-size:10px;color:#7f8778;text-align:right}.truth-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.truth-card{padding:10px 4px;border:1px solid #c5ccba;background:#f1f1e4;border-radius:7px;min-height:81px;display:flex;flex-direction:column;align-items:center;gap:8px}.truth-inputs{font:12px ui-monospace,monospace;color:#6d7865}.truth-answer{display:flex;align-items:center;gap:7px;font:600 15px ui-monospace,monospace}.tiny-lamp{height:15px;width:15px;border-radius:50%;background:#c0c7b4;border:1px solid #a5ae98}.tiny-lamp.is-on{background:#f9b74e;border-color:#dc8d30;box-shadow:0 0 8px #f2bb5766}.truth-card[aria-pressed=true]{background:#fff6e7;border:2px solid #dc6e3b;padding:9px 3px}.truth-caption{font-size:11px;color:#788170;margin:11px 0 0;line-height:1.8}.history-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.history-card{background:transparent;border:1px solid #c6ccbd;border-radius:5px;min-height:55px;display:flex;align-items:center;gap:8px;text-align:left;padding:7px 10px}.history-card:hover{background:#e9ecde}.history-card>i{color:#8a9382;font:11px ui-monospace,monospace;font-style:normal}.history-card>span{flex:1;font-size:10px;line-height:1.6}.history-card b{font-size:12px;font-weight:600;display:block}.history-card em{font-style:normal;color:#737f68}.history-card .tiny-lamp{flex:none}.history-card[aria-current=true]{border-color:#80916f}.history-empty{font-size:12px;color:#88917d;line-height:1.9;padding:10px;margin:0}footer{display:flex;justify-content:space-between;gap:20px;margin:36px 0 25px;padding-top:19px;border-top:1px solid #c1c8b6;color:#7c8572;font-size:11px;line-height:1.8}dialog#info-dialog{width:min(650px,calc(100vw - 28px));max-height:88vh;border:1px solid #afb7a5;border-radius:12px;padding:34px;background:var(--paper);color:var(--ink);box-shadow:0 30px 100px #17251c55}dialog::backdrop{background:#2334299e;backdrop-filter:blur(4px)}.close-info{position:absolute;right:15px;top:10px;width:44px;height:44px;background:none;border:0;font-size:28px}#info-dialog .eyebrow{font-size:12px;letter-spacing:1px;padding-right:35px}#info-dialog h2{font-size:30px;line-height:1.5;margin:12px 0 20px}#info-dialog h3{font-size:17px;margin:24px 0 8px}#info-dialog p{font-size:14px;line-height:1.95}#info-dialog .boundary{font-size:12px;border-left:3px solid var(--orange);padding:10px 15px;background:#eeeade}.info-rules{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:20px 0}.info-rules>span{background:#ececde;padding:12px 9px;font-size:11px;line-height:1.8}.info-rules b{display:block;font-size:15px;margin-bottom:5px;color:#bd4b29}.source-links{display:flex;flex-direction:column;gap:8px}.source-links a{font-size:12px;color:var(--blue);text-underline-offset:4px}#info-dialog .smallprint{font-size:11px;color:#79836f}[hidden]{display:none!important}
@media(min-width:1600px){.scene{height:360px}.input-block{left:7%}.gate-cluster{left:32%}.invert-block{left:60%}.output-block{left:82%}}
@media(max-width:1000px) and (min-width:761px){.page{padding:0 25px}.input-block{left:4%;width:117px}.gate-cluster{left:28%;width:153px}.invert-block{left:57%;width:124px}.output-block{left:80%;width:105px}.lamp{width:80px;height:80px}.results-area{gap:22px}.panel-heading{flex-direction:column;gap:5px}}
@media(max-width:760px){.page{padding:0 16px}.masthead{min-height:62px;gap:5px}.back{font-size:11px;max-width:205px}.info-button{font-size:11px;white-space:nowrap}.intro{padding:25px 0 23px;gap:0}.eyebrow{font-size:12px;letter-spacing:1px;margin-bottom:9px}h1{font-size:29px;letter-spacing:-1px;line-height:1.4}.intro-mark{display:none}.workbench{border-radius:10px}.board-heading{margin:0 14px;height:42px;font-size:10px;letter-spacing:.5px}.signal-key{font-size:11px;gap:5px}.signal-key>i{width:15px;height:4px}.scene{height:461px;background-size:15px 15px}.input-block{width:112px;height:99px;padding:8px 10px}.input-top>b{font-size:14px;width:22px;height:22px}.input-top{font-size:10px}.lever{width:86px;height:30px;margin-top:4px}.lever>i{width:38px;height:24px}.is-on .lever>i{transform:translateX(42px)}.lever>i:after{inset:6px 15px}.tap-label{font-size:9px}.input-port{top:auto;bottom:-6px;left:calc(50% - 5px);right:auto}#input-a{left:7%;top:22px}#input-b{left:auto;right:7%;top:22px}.gate-cluster{left:6%;top:174px;width:138px}.gate-block{height:125px;padding:12px 4px 7px}.gate-block>strong{font-size:19px;letter-spacing:2px}.gate-rule{font-size:9px}#gate-symbol{height:39px;width:60px}.gate-input-a{top:-6px;left:25%}.gate-input-b{top:-6px;left:72%}.gate-input-a>i,.gate-input-b>i{top:-25px;left:-7px;min-width:18px;font-size:11px;height:18px;line-height:18px}.gate-output{top:calc(50% - 5px)}.gate-output>i{top:-7px;left:13px;min-width:17px;font-size:11px}.gate-choices{gap:6px;margin-top:14px}.gate-choices>button{font-size:12px}.swap-label{font-size:9px;padding-top:4px}.invert-block{left:auto;right:6%;top:174px;width:108px;height:125px;padding:5px 2px;gap:5px}.invert-block>strong{font-size:13px}.invert-symbol{font-size:24px}.invert-note{font-size:9px}.invert-equation{font-size:12px}.invert-input>i{display:none}.invert-output{right:auto;left:calc(50% - 5px);top:auto;bottom:-6px}.invert-output>i{left:13px;top:1px;font-size:11px}.output-block{left:calc(50% - 102px);top:378px;width:204px;height:67px;padding:7px 12px;flex-direction:row;gap:17px;border:1px solid #c5cbb9;background:#f6f5e9;border-radius:34px;box-shadow:0 3px 0 #c8cebc}.lamp{height:49px;width:49px;flex:none;border-width:4px}.lamp>span{font-size:30px}.lamp-port{left:calc(50% - 5px);top:-6px}.output-copy{margin:0;gap:10px}.output-copy>span{font-size:10px}.output-copy strong{font-size:19px}.output-copy>b{font-size:14px}.board-stamp{right:12px;bottom:11px;font-size:8px;writing-mode:vertical-rl;letter-spacing:1px}.state-strip{padding:8px 11px;gap:7px;min-height:59px}.equation{font-size:10px;line-height:1.9}.equation>i{padding:0 4px}.reset-button{font-size:10px;padding:0 8px;min-height:44px}.action-status{font-size:10px;line-height:1.8;padding:17px 0 21px;min-height:56px}.results-area{grid-template-columns:1fr;gap:25px}.panel-heading{padding-bottom:12px;gap:8px}.panel-heading h2{font-size:15px}.panel-heading>span{font-size:9px}.truth-grid{gap:6px}.truth-card{min-height:78px;padding:10px 2px}.truth-card[aria-pressed=true]{padding:9px 1px}.truth-inputs{font-size:11px}.truth-caption{font-size:10px}.history-card{padding:7px 8px}.history-card b{font-size:11px}footer{font-size:9px;margin:29px 0 20px;padding-top:15px;gap:9px}dialog#info-dialog{padding:25px 20px}#info-dialog h2{font-size:26px}#info-dialog p{font-size:13px}.info-rules{gap:5px}.info-rules>span{font-size:10px;padding:9px 5px}.info-rules b{font-size:12px}}
@media(max-width:360px){.page{padding:0 12px}h1{font-size:27px}.gate-cluster{width:126px;left:5%}.invert-block{right:5%;width:103px}.input-block{width:104px}.back{max-width:175px}.state-strip{padding:8px}.equation{font-size:9px}.equation>i{padding:0 2px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}