@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab,red,red)){::placeholder{color:color-mix(in oklab,currentcolor 50%,transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.contents{display:contents}.table{display:table}}:root{--ink:#162033;--muted:#687286;--paper:#f5f3ed;--card:#fffefa;--line:#dcd9cf;--blue:#1768e5;--blue-soft:#e8f0ff;--amber:#d36b16;--amber-soft:#fff0dd;--green:#16805b;--green-soft:#e2f6ee;--navy:#17253f}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);color:var(--ink);margin:0;font-family:Inter,Noto Sans SC,Microsoft YaHei,sans-serif}button,input,select{font:inherit}button{color:inherit}main{min-height:100vh;overflow:hidden}.topbar{border-bottom:1px solid var(--line);z-index:20;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#f5f3edeb;justify-content:space-between;align-items:center;height:64px;padding:0 max(28px,50vw - 710px);display:flex;position:sticky;top:0}.brand{color:var(--navy);letter-spacing:.08em;align-items:center;gap:11px;font-weight:850;text-decoration:none;display:flex}.brand-mark{background:var(--navy);color:#fff;border-radius:9px;place-items:center;width:32px;height:32px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;display:grid}.header-note{color:var(--muted);align-items:center;gap:8px;font-size:13px;display:flex}.live-dot{background:var(--green);border-radius:50%;width:8px;height:8px;box-shadow:0 0 0 5px #16805b1a}.hero{grid-template-columns:1fr auto;align-items:center;gap:34px;max-width:1420px;margin:0 auto;padding:30px 28px 22px;display:grid}.eyebrow{letter-spacing:.22em;color:var(--blue);margin:0 0 17px;font-size:12px;font-weight:800}.hero h1{letter-spacing:-.055em;max-width:900px;color:var(--navy);margin:0;font-size:clamp(34px,4vw,56px);font-weight:820;line-height:1}.hero h1 em{color:var(--blue);font-style:normal}.hero-copy{max-width:720px;color:var(--muted);margin:12px 0 0;font-size:14px;line-height:1.6}.result-panel{background:var(--navy);color:#fff;border-radius:15px;min-width:270px;padding:16px 20px;box-shadow:6px 6px #d9d3c5}.result-panel span,.result-panel small{color:#b9c5da;font-size:12px;display:block}.result-panel strong{letter-spacing:-.04em;margin:3px 0 5px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:28px;display:block}.result-panel .check-ok{color:#7de0b9}.learning-rail{border:1px solid var(--line);background:#ebe9e2;border-radius:12px;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;align-items:center;gap:10px;width:calc(100% - 56px);max-width:1364px;margin:0 auto 12px;padding:8px 14px;display:grid}.learning-rail a{min-width:0;color:var(--ink);align-items:center;gap:9px;text-decoration:none;display:flex}.learning-rail a>b{width:25px;height:25px;color:var(--blue);background:#fff;border-radius:7px;flex:none;place-items:center;font-size:10px;display:grid}.learning-rail a span,.learning-rail a small{display:block}.learning-rail a span{font-size:10px;font-weight:800}.learning-rail a small{color:var(--muted);margin-top:2px;font-size:8px;font-weight:500}.learning-rail>i{color:#9a9ea6;font-size:10px;font-style:normal}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:0 12px 30px #1c23320b}.config,.lab-section,.table-explorer,.mastery{width:calc(100% - 56px);max-width:1364px;margin:0 auto}.config{padding:18px 20px}.section-title{justify-content:space-between;align-items:flex-start;gap:30px;margin-bottom:14px;display:flex}.section-title>div{align-items:center;gap:12px;display:flex}.section-title h2{letter-spacing:-.02em;margin:0;font-size:21px}.section-title p{max-width:620px;color:var(--muted);text-align:right;margin:3px 0 0;font-size:13px;line-height:1.65}.step-badge{border:1px solid var(--line);width:30px;height:26px;color:var(--blue);border-radius:8px;place-items:center;font:700 11px ui-monospace,SFMono-Regular,Consolas,monospace;display:grid}.config-grid{grid-template-columns:1.5fr .65fr .8fr .8fr .8fr 1.45fr;gap:12px;display:grid}.field{flex-direction:column;gap:7px;display:flex}.field>span,.data-input>span{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:11px;font-weight:750}.field input,.field select,.data-input input,.speed select{border:1px solid var(--line);height:44px;color:var(--ink);background:#faf9f5;border-radius:10px;outline:none;padding:0 12px}.field input{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.field input:focus,.field select:focus,.data-input input:focus{border-color:var(--blue);box-shadow:0 0 0 3px #1768e51a}.toggle-field{cursor:pointer;align-items:center;gap:11px;margin-top:18px;display:flex}.toggle-field input{opacity:0;position:absolute}.toggle{background:#c9cbd0;border-radius:999px;flex:none;width:42px;height:24px;padding:3px;transition:all .2s}.toggle:after{content:"";background:#fff;border-radius:50%;width:18px;height:18px;transition:all .2s;display:block;box-shadow:0 1px 3px #0003}.toggle-field input:checked+.toggle{background:var(--blue)}.toggle-field input:checked+.toggle:after{transform:translate(18px)}.toggle-field b,.toggle-field small{display:block}.toggle-field b{font-size:12px}.toggle-field small{color:var(--muted);margin-top:3px;font-size:10px}.data-row{border-top:1px solid var(--line);grid-template-columns:auto minmax(260px,1fr) 1.1fr;align-items:end;gap:12px;margin-top:13px;padding-top:12px;display:grid}.segmented{background:#ebe9e2;border-radius:10px;padding:3px;display:flex}.segmented button{cursor:pointer;background:0 0;border:0;border-radius:8px;padding:10px 15px;font-size:11px;font-weight:800}.segmented button.active{color:var(--blue);background:#fff;box-shadow:0 1px 5px #0000001a}.data-input{flex-direction:column;gap:7px;display:flex}.data-input input{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.byte-preview{flex-wrap:wrap;align-items:center;gap:6px;min-height:44px;display:flex}.byte-preview span{min-width:34px;color:var(--muted);text-align:center;background:#efede7;border-radius:7px;padding:7px 6px;font:700 11px ui-monospace,SFMono-Regular,Consolas,monospace}.byte-preview span.current{background:var(--blue);color:#fff;transform:translateY(-2px)}.concept-strip{border:1px solid var(--line);background:var(--line);border-radius:8px;grid-template-columns:repeat(5,1fr);gap:1px;margin-top:11px;display:grid;overflow:hidden}.concept-strip span{background:#f6f5f1;padding:7px 9px}.concept-strip b,.concept-strip small{display:block}.concept-strip b{color:var(--navy);font-size:9px}.concept-strip small{color:var(--muted);margin-top:2px;font-size:8px;line-height:1.35}.lab-section{margin-top:28px}.transport{grid-template-columns:auto 1fr auto auto;align-items:center;gap:16px;margin-bottom:10px;padding:11px 14px;display:grid}.transport-state{min-width:150px}.transport-state span,.transport-state strong{display:block}.transport-state span{font-size:12px;font-weight:750}.transport-state strong{color:var(--muted);margin-top:3px;font:600 11px ui-monospace,SFMono-Regular,Consolas,monospace}.transport input[type=range]{width:100%;accent-color:var(--blue);cursor:pointer}.transport-buttons{gap:6px;display:flex}.transport button{border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:9px;padding:9px 12px;font-size:11px;font-weight:750}.transport button:hover{border-color:#aab0bb;transform:translateY(-1px)}.transport button.primary{background:var(--blue);color:#fff;border-color:var(--blue);min-width:58px}.speed{color:var(--muted);white-space:nowrap;font-size:11px}.speed select{height:36px;margin-left:7px}.algorithm-grid{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}.algorithm-card{border:1px solid var(--line);background:var(--card);border-radius:14px;min-width:0;padding:17px;position:relative;overflow:hidden}.algorithm-card:before{content:"";background:var(--blue);height:4px;display:block;position:absolute;top:0;left:0;right:0}.pre-card:before{background:var(--amber)}.table-card:before{background:var(--green)}.card-head{justify-content:space-between;align-items:center;margin-bottom:10px;display:flex}.card-head span{font-size:19px;font-weight:850}.card-head b{color:var(--blue);background:var(--blue-soft);border-radius:6px;padding:6px 9px;font-size:10px}.pre-card .card-head b{color:var(--amber);background:var(--amber-soft)}.table-card .card-head b{color:var(--green);background:var(--green-soft)}.algorithm-card>p{color:var(--muted);min-height:34px;margin:0 0 9px;font-size:11px;line-height:1.55}.register{grid-template-columns:repeat(8,minmax(0,1fr));gap:3px;margin:14px 0;display:grid}.register span{height:34px;color:var(--navy);background:#f0f5fc;border:1px solid #cdd7e7;border-radius:5px;place-items:center;font:800 13px ui-monospace,SFMono-Regular,Consolas,monospace;display:grid;position:relative}.register span small{color:#9ba6b5;font-size:7px;position:absolute;top:2px;right:3px}.register-amber span{background:#fff7ed;border-color:#edd7bc}.register-green span{background:#eef9f4;border-color:#bfddcf}.register-purple span{color:#624696;background:#f3effc;border-color:#d8caef}.register span.edge-bit{border-color:var(--blue);box-shadow:inset 0 0 0 1px var(--blue);color:var(--blue)}.register span.active-data-bit{color:#fff;background:#7250aa;border-color:#7250aa;transform:translateY(-2px);box-shadow:0 0 0 3px #7250aa26}.register span.active-data-bit small{color:#ded2ef}.register-row{grid-template-columns:150px minmax(270px,1fr) 76px;align-items:center;gap:12px;display:grid}.register-row .register{margin:5px 0}.register-label b,.register-label small{display:block}.register-label b{font-size:11px}.register-label small{color:var(--muted);margin-top:3px;font-size:9px;line-height:1.35}.register-row>code{text-align:right;color:var(--navy);font-size:12px;font-weight:800}.algorithm-tabs{grid-template-columns:repeat(3,1fr);gap:7px;margin-bottom:8px;display:grid}.algorithm-tabs button{border:1px solid var(--line);cursor:pointer;text-align:left;background:#eceae4;border-radius:10px;flex-direction:column;justify-content:center;align-items:flex-start;gap:3px;min-height:54px;padding:9px 14px;display:flex}.algorithm-tabs button b{font-size:12px}.algorithm-tabs button span{color:var(--muted);font-size:9px}.algorithm-tabs button.active{border-color:var(--blue);box-shadow:inset 0 -3px var(--blue);background:#fff}.algorithm-tabs button.active.pre{border-color:var(--amber);box-shadow:inset 0 -3px var(--amber)}.algorithm-tabs button.active.table{border-color:var(--green);box-shadow:inset 0 -3px var(--green)}.algorithm-focus{border:1px solid var(--line);background:var(--card);border-radius:14px;position:relative;overflow:visible}.algorithm-focus.direct{border-top:4px solid var(--blue)}.algorithm-focus.pre{border-top:4px solid var(--amber)}.algorithm-focus.table{border-top:4px solid var(--green)}.walkthrough{padding:16px 20px 18px}.walkthrough-head{justify-content:space-between;align-items:center;gap:20px;margin-bottom:10px;display:flex}.walkthrough-head span{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:9px;font-weight:800}.walkthrough-head h3{margin:3px 0 0;font-size:18px}.walk-actions{align-items:center;gap:7px;display:flex}.walk-actions>b{background:var(--blue-soft);color:var(--blue);white-space:nowrap;border-radius:7px;padding:6px 9px;font-size:9px}.pre-card .walk-actions>b{background:var(--amber-soft);color:var(--amber)}.table-card .walk-actions>b{background:var(--green-soft);color:var(--green)}.walk-actions button{border:1px solid var(--line);color:var(--ink);cursor:pointer;background:#fff;border-radius:7px;padding:7px 10px;font-size:9px;font-weight:800}.walk-actions button:hover{background:#f7f6f2;border-color:#9aa3b1}.pseudo-popover{z-index:15;background:var(--navy);color:#fff;border:1px solid #344563;border-radius:11px;width:min(440px,100% - 36px);padding:13px;position:absolute;top:12px;right:18px;box-shadow:0 18px 45px #141d2f47}.pseudo-popover>div{justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px;display:flex}.pseudo-popover>div span{color:#b9c6d9;font-size:10px;font-weight:800}.pseudo-popover>div button{color:#8de0c0;cursor:pointer;background:0 0;border:0;font-size:9px;font-weight:800}.pseudo-popover pre{background:#101b30;border:1px solid #334562;border-radius:8px;max-height:340px;margin:0;padding:11px 12px;overflow:auto}.pseudo-popover pre code{color:#e0e8f3;white-space:pre;font:10px/1.55 ui-monospace,SFMono-Regular,Consolas,monospace}.pseudo-popover>small{color:#8494ad;margin-top:7px;font-size:8px;display:block}.concept-note{border-radius:8px;grid-template-columns:190px 1fr;gap:13px;margin-bottom:10px;padding:9px 12px;font-size:10px;line-height:1.5;display:grid}.concept-note.blue{background:var(--blue-soft);color:#315e9f}.concept-note.amber{background:var(--amber-soft);color:#8c6036}.concept-note.green{background:var(--green-soft);color:#326f5a}.concept-note strong{color:var(--ink)}.flow-arrow{color:#7250aa;text-align:center;width:170px;margin:1px 88px 1px auto;font-size:9px;font-weight:800}.feedback-equation{background:var(--blue-soft);border:1px solid #b9cff0;border-radius:8px;grid-template-columns:120px 1fr auto;align-items:center;gap:12px;margin:5px 0;padding:10px 13px;display:grid}.feedback-equation>span{color:var(--blue);font-size:10px;font-weight:800}.feedback-equation code{color:#3c4d66;font-size:12px}.feedback-equation code b{color:var(--blue);font-size:15px}.feedback-equation small{color:var(--muted);font-size:9px}.xor-stack,.stage-block{background:#faf9f6;border:1px solid #e1e2e4;border-radius:9px;padding:9px 12px}.xor-stack{position:relative}.xor-symbol{color:#7656a9;place-items:center;width:24px;height:24px;margin:-3px 78px -3px auto;font-size:18px;font-weight:800;display:grid}.xor-rule{background:#9da6b3;height:2px;margin:2px 0 3px 162px}.stage-block+.stage-block{margin-top:9px}.stage-block h4{align-items:center;gap:8px;margin:0 0 7px;font-size:11px;display:flex}.stage-block h4 span{color:#fff;background:var(--amber);border-radius:5px;padding:4px 7px;font-size:8px}.muted-stage{opacity:.55}.relation-note{background:var(--amber-soft);border-radius:8px;grid-template-columns:180px 1fr;align-items:center;gap:10px;margin-top:9px;padding:9px 12px;display:grid}.relation-note b{color:var(--amber);font-size:10px}.relation-note code{color:#75512e;font-size:10px}.table-two-stage{grid-template-columns:.92fr 1.08fr;gap:9px;display:grid}.table-card .stage-block h4 span{background:var(--green)}.stage-block>p{color:var(--muted);margin:0 0 5px;font-size:9px;line-height:1.5}.why-256{background:var(--green-soft);color:#326f5a;border-radius:7px;grid-template-columns:125px 1fr;gap:8px;margin-bottom:7px;padding:8px 9px;font-size:9px;line-height:1.45;display:grid}.why-256 b{color:var(--green)}.build-index-control{border:1px solid #cfe0d9;border-radius:7px;grid-template-columns:auto 1fr auto;align-items:center;gap:9px;margin-bottom:7px;padding:7px 9px;display:grid}.build-index-control span{color:var(--muted);font-size:8px;font-weight:750}.build-index-control input{width:100%;accent-color:var(--green)}.build-index-control code{color:var(--green);font-size:9px;font-weight:800}.build-seed,.runtime-readonly{color:#326f5a;background:#eef4f1;border-radius:7px;grid-template-columns:1fr auto;align-items:center;gap:8px;margin-bottom:7px;padding:8px 9px;font-size:9px;display:grid}.build-seed code{color:var(--green);font-weight:800}.runtime-readonly{background:var(--blue-soft);color:#315e9f;grid-template-columns:115px 1fr;line-height:1.45}.runtime-readonly b{color:var(--blue)}.build-step-control{grid-template-columns:auto repeat(8,27px) auto;justify-content:center;gap:3px;margin:7px 0;display:grid}.build-step-control button{color:#65706b;cursor:pointer;background:#fff;border:1px solid #d6ddd9;border-radius:5px;height:25px;padding:0 7px;font-size:8px;font-weight:800}.build-step-control button.current{border-color:var(--green);background:var(--green);color:#fff}.build-step-control button:disabled{opacity:.35;cursor:default}.copy-runtime-index{background:var(--blue-soft);width:100%;color:var(--blue);cursor:pointer;border:1px dashed #91b6dc;border-radius:7px;margin-top:8px;padding:8px 10px;font-size:8px;font-weight:800}.copy-runtime-index:hover{border-style:solid}.save-entry{background:var(--navy);color:#fff;border-radius:7px;grid-template-columns:auto 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