@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;--spacing:.25rem;--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;-webkit-text-decoration:inherit;-webkit-text-decoration: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{.relative{position:relative}.start{inset-inline-start:var(--spacing)}.grid{display:grid}.table{display:table}}:root{--ink:#17233c;--blue:#2856f6;--cyan:#22c7e8;--yellow:#ffc83d;--cream:#fff9ee;--line:#dce3ef;--purple:#7456e8}*{box-sizing:border-box}html{scroll-behavior:smooth}body{color:var(--ink);background:#fff;margin:0;font-family:PingFang SC,Microsoft YaHei,system-ui,sans-serif}button,a{font:inherit}a{color:inherit;text-decoration:none}.topbar{-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);z-index:20;background:#ffffffed;border-bottom:1px solid #e8ecf3;align-items:center;height:74px;padding:0 4.5vw;display:flex;position:sticky;top:0}.brand{white-space:nowrap;align-items:center;gap:10px;font-weight:900;display:flex}.brandMark{background:var(--blue);color:#fff;width:40px;height:40px;box-shadow:4px 4px 0 var(--yellow);border-radius:12px;place-items:center;font-size:15px;display:grid;transform:rotate(-5deg)}.topbar nav{color:#58627a;gap:24px;margin:auto;font-size:13px;font-weight:700;display:flex}.topbar nav a:hover{color:var(--blue)}.startButton,.primary{background:var(--blue);color:#fff;border-radius:10px;padding:12px 18px;font-weight:800;box-shadow:0 5px #183bb7}.startButton span,.primary b{color:var(--yellow)}.hero{background:radial-gradient(circle at 77% 28%,#f5edff 0 12%,#0000 30%),linear-gradient(135deg,#fff 55%,#f8fbff);grid-template-columns:1fr 1fr;align-items:center;min-height:660px;padding:80px 7vw 60px;display:grid;overflow:hidden}.eyebrow,.chapter{letter-spacing:1.2px;text-transform:uppercase;color:var(--blue);font-size:13px;font-weight:900}.eyebrow span{color:#27d1a2}.hero h1{letter-spacing:-4px;margin:20px 0 25px;font-size:clamp(50px,6vw,86px);line-height:1.03}.hero h1 em{color:var(--blue);font-style:normal;position:relative}.hero h1 em:after{content:"";background:var(--yellow);z-index:-1;border-radius:50%;height:10px;position:absolute;bottom:-3px;left:3%;right:0}.lead{color:#667086;max-width:610px;font-size:18px;line-height:1.9}.heroActions{align-items:center;gap:24px;margin-top:35px;display:flex}.primary{padding:16px 24px}.classMeta{grid-template-columns:auto auto;column-gap:7px;display:grid}.classMeta i{color:var(--blue);grid-row:span 2;font-size:21px;font-style:normal;font-weight:900}.classMeta small{color:#727b90;font-size:11px}.heroVisual{place-items:center;height:500px;display:grid;position:relative}.brain{z-index:3;background:linear-gradient(145deg,#8165f0,#3929a8);border:12px solid #ebe7ff;border-radius:47% 47% 38% 38%;width:285px;height:310px;position:relative;overflow:hidden;box-shadow:0 32px 60px #3f35aa35}.brainTop{color:#fff;place-items:center;height:93px;font-size:50px;font-weight:1000;display:grid}.brainGrid{background:#21177a;grid-template-columns:repeat(5,1fr);gap:9px;height:100%;padding:22px;display:grid}.brainGrid i{background:#6f5fe0;border:2px solid #9186f1;border-radius:5px}.brainGrid i:nth-child(3n){background:var(--cyan)}.brainGrid i:nth-child(4n){background:var(--yellow)}.orbit{z-index:1;border:2px dashed #9aa8d0;border-radius:50%;animation:28s linear infinite spin;position:absolute}.orbit span{width:42px;height:42px;color:var(--blue);background:#fff;border-radius:13px;place-items:center;font-weight:900;display:grid;position:absolute;box-shadow:0 5px 15px #263b7430}.orbitOne{width:440px;height:440px}.orbitOne span:first-child{top:25px;left:45px}.orbitOne span:nth-child(2){top:180px;right:-18px}.orbitOne span:nth-child(3){bottom:12px;left:80px}.orbitTwo{width:355px;height:355px;animation-direction:reverse}.orbitTwo span:first-child{top:28px;right:20px}.orbitTwo span:nth-child(2){top:185px;left:-12px}.orbitTwo span:nth-child(3){bottom:60px;right:10px}@keyframes spin{to{transform:rotate(360deg)}}.robot{z-index:5;background:#fff;border:2px solid #dfe5f2;border-radius:22px;padding:14px;position:absolute;bottom:14%;right:2%;box-shadow:0 12px 30px #30406a25}.robot b{color:var(--blue);text-align:center;font-size:26px;display:block}.robot span{font-size:11px;font-weight:800}.heroTag{z-index:4;background:#fff;border:1px solid #dfe5f2;border-radius:12px;padding:10px 13px;font-size:11px;position:absolute;box-shadow:0 8px 20px #25345a20}.heroTag b{color:var(--blue);font-size:16px;display:block}.tagA{top:17%;left:1%}.tagB{bottom:19%;left:2%}.lesson{padding:100px 7vw}.sectionHead{text-align:center;max-width:760px;margin:0 auto 48px}.sectionHead h2{letter-spacing:-2px;margin:10px 0 14px;font-size:clamp(34px,4vw,55px)}.sectionHead p{color:#687287;font-size:17px;line-height:1.7}.sectionHead.light h2,.sectionHead.light p{color:#fff}.sectionHead.light .chapter{color:var(--yellow)}.buildingBlocks{grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;gap:18px;max-width:1200px;margin:auto;display:grid}.concept{background:#fff;border:2px solid #e4e8f0;border-radius:24px;flex-direction:column;justify-content:space-between;min-height:280px;padding:24px;display:flex;box-shadow:0 10px #edf0f6}.conceptIcon{place-items:center;height:95px;display:grid}.conceptIcon>span{border:3px solid var(--blue);width:66px;height:66px;color:var(--blue);background:#e9edff;border-radius:15px;place-items:center;font-size:28px;font-weight:900;display:grid;box-shadow:7px 7px #bfcaf7}.concept .mini{color:#8a93a5;margin:0;font-size:11px;font-weight:800}.concept h3{margin:4px 0 9px;font-size:24px}.concept h3 small{color:#8992a4;font-size:12px}.concept p{color:#687287;font-size:13px;line-height:1.6}.concept code{color:var(--blue);background:#f3f5f9;border-radius:8px;padding:8px 10px;font-weight:800;display:inline-block}.cubes{grid-template-columns:repeat(3,50px);transform:rotate(-8deg)}.cubes span{color:#178aa0;background:#e9fcff;border-color:#12aeca;width:50px;height:50px;box-shadow:5px 5px #a8edf7}.tensorCube{border:3px solid var(--purple);background:#f1edff;border-radius:10px;grid-template-columns:repeat(3,1fr);gap:4px;width:95px;height:95px;padding:8px;display:grid;transform:skewY(-5deg);box-shadow:10px 10px #cfc4ff}.tensorCube i{background:var(--purple);border-radius:3px}.plus{color:#b4bccb;font-size:35px;font-weight:300}.teacherTip{background:var(--cream);border:2px dashed var(--yellow);border-radius:16px;align-items:center;gap:18px;max-width:930px;margin:45px auto 0;padding:17px;display:flex}.teacherTip b{background:var(--yellow);white-space:nowrap;border-radius:7px;padding:8px}.teacherTip span{font-size:14px}.cnnSection{color:#fff;background:#17233c;position:relative}.cnnLab{grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;gap:22px;max-width:1180px;margin:auto;display:grid}.pixelPanel,.filterPanel,.featurePanel{height:335px;color:var(--ink);text-align:center;background:#fff;border:0;border-radius:24px;padding:22px}.pixelPanel p,.filterPanel p,.featurePanel p{margin:0 0 18px;font-weight:900}.pixelCat{background:#edf1f7;border-radius:12px;grid-template-columns:repeat(7,1fr);gap:3px;width:196px;height:196px;margin:auto;padding:6px;display:grid}.pixelCat i{background:#fff;border-radius:2px}.pixelCat i.dark{background:#33405d}.pixelPanel small,.filterPanel small,.featurePanel small{color:#788298;margin-top:12px;display:block}.flowArrow{color:var(--cyan);text-align:center;font-size:32px}.flowArrow small{color:#aab5ca;font-size:10px;line-height:1.5;display:block}.filterPanel{cursor:pointer;border:3px solid #0000;transition:all .25s}.filterPanel:hover,.filterPanel.on{border-color:var(--yellow);transform:translateY(-5px)}.lens{color:var(--blue);height:65px;font-size:48px}.filterGrid{background:#b8c1d2;grid-template-columns:repeat(3,1fr);gap:3px;width:126px;height:126px;margin:auto;padding:3px;display:grid}.filterGrid i{background:#f0f3f7;place-items:center;font-size:12px;font-style:normal;display:grid}.filterPanel.on .filterGrid i:nth-child(3n+1){background:#e4fcff}.filterPanel.on .filterGrid i:nth-child(3n){background:#ffeeb6}.featureStack{width:155px;height:150px;margin:auto;position:relative}.featureStack i{background:#eef2f8;border:3px solid #bfc8da;border-radius:16px;position:absolute;inset:0;transform:rotate(-8deg)}.featureStack i:nth-child(2){background:#e9edff;left:13px;transform:rotate(3deg)}.featureStack i:nth-child(3){background:#c9d3fa;left:25px;transform:rotate(12deg)}.featurePanel strong{color:#9aa4b7;font-size:20px}.featurePanel.revealed strong{color:#20aa7d}.featurePanel.revealed .featureStack i{border-color:var(--cyan)}.analogy{background:#25314b;border-radius:18px;align-items:center;gap:18px;max-width:820px;margin:45px auto 0;padding:20px;display:flex}.analogyIcon{font-size:38px}.analogy b{color:var(--yellow)}.analogy p{color:#c4ccda;margin:4px 0}.attentionLab{grid-template-columns:1.2fr .8fr;gap:28px;max-width:1100px;margin:auto;display:grid}.sentence,.transformerMachine{background:#fff;border:2px solid #e4e8f1;border-radius:24px;padding:30px;box-shadow:0 10px #eef1f6}.sentence>p{font-weight:800}.wordRow{flex-wrap:wrap;gap:8px;margin:27px 0;display:flex}.wordRow button{cursor:pointer;background:#f0f3f8;border:0;border-radius:9px;padding:12px 14px;font-weight:800}.wordRow button:hover,.wordRow button.active{background:var(--blue);color:#fff;transform:translateY(-3px)}.attentionLines{gap:11px;display:grid}.attentionLines span{color:#6e778a;grid-template-columns:55px 1fr;align-items:center;font-size:12px;display:grid}.attentionLines i{background:#dce2ed;border-radius:5px;height:8px;transition:all .3s;display:block}.attentionLines span.hot{color:var(--blue);font-weight:900}.attentionLines span.hot i{background:linear-gradient(90deg,var(--blue),var(--cyan));height:13px}.transformerMachine{color:#fff;background:#1f2c49;box-shadow:0 10px #0c1528}.machineTop{color:var(--yellow);border-bottom:1px solid #43506a;padding-bottom:14px;font-weight:900}.machineTop i{background:#3ce1a8;border-radius:50%;width:8px;height:8px;margin-right:8px;display:inline-block}.machineCore{justify-content:space-between;align-items:center;margin:60px 0;display:flex}.machineCore span{text-align:center;background:var(--blue);border-radius:50%;place-items:center;width:78px;height:78px;font-size:22px;font-weight:900;display:grid}.machineCore span.value{background:var(--purple)}.machineCore small{font-size:8px;font-weight:500}.transformerMachine>p{text-align:center;color:#aab5c9;font-size:12px}.compareCards{grid-template-columns:1fr 1fr;gap:18px;max-width:920px;margin:45px auto 0;display:grid}.compareCards article{background:#f4f6fa;border-radius:16px;gap:14px;padding:18px;display:flex}.compareCards span{font-size:30px}.compareCards p{color:#6b7487;margin:4px 0;font-size:13px}.chipsSection{color:#fff;background:#2856f6}.processorTrack{grid-template-columns:repeat(3,1fr);gap:22px;max-width:1120px;margin:auto;display:grid}.processorTrack article{color:var(--ink);text-align:center;background:#fff;border-radius:22px;padding:26px;box-shadow:0 9px #163cbe}.runner{background:var(--yellow);color:#263451;border:6px solid #fff;border-radius:20px;place-items:center;width:70px;height:70px;margin:-48px auto 15px;font-size:28px;font-weight:1000;display:grid;transform:rotate(-5deg)}.processorTrack h3{margin:7px}.processorTrack p{color:#788195;font-size:12px}.race{justify-content:center;align-items:center;gap:7px;height:75px;margin:14px 0;display:flex}.race i{background:#8099fa;border-radius:5px;width:20px;height:45px}.race i:nth-child(2){height:60px}.race i:nth-child(3){height:30px}.race.grid{grid-template-columns:repeat(3,22px);gap:4px;display:grid}.race.grid i{background:var(--purple);width:22px;height:20px}.processorTrack article>b{color:var(--blue);display:block}.processorTrack article>small{color:#758094}.hardwareMap{background:#1f47d5;border:1px solid #7593ff;border-radius:18px;justify-content:space-between;align-items:center;gap:16px;max-width:1130px;margin:55px auto 0;padding:20px;font-size:12px;display:flex}.hardwareMap b{color:var(--yellow)}.hardwareMap span{color:var(--ink);background:#fff;border-radius:8px;padding:10px}.quizSection{background:var(--cream)}.quizGrid{grid-template-columns:repeat(3,1fr);gap:20px;max-width:1140px;margin:auto;display:grid}.quizGrid article{background:#fff;border:2px solid #e6e2d8;border-radius:20px;padding:23px}.qnum{color:var(--blue);font-size:13px;font-weight:900}.quizGrid h3{min-height:52px;font-size:17px}.quizGrid button{text-align:left;cursor:pointer;background:#f6f7f9;border:2px solid #0000;border-radius:10px;align-items:center;gap:10px;width:100%;margin:8px 0;padding:10px;font-size:12px;display:flex}.quizGrid button i{background:#fff;border-radius:7px;place-items:center;width:24px;height:24px;font-style:normal;font-weight:900;display:grid}.quizGrid button:hover,.quizGrid button.selected{border-color:var(--blue);color:var(--blue);background:#edf1ff;font-weight:800}.scoreBoard{color:#fff;background:#17233c;border-radius:20px;align-items:center;gap:25px;max-width:850px;margin:40px auto 0;padding:22px 30px;display:flex}.badges{white-space:nowrap}.badges span{color:#4a556d;font-size:38px;transition:all .3s}.badges span.earned{color:var(--yellow);text-shadow:0 3px #a06f00}.scoreBoard p{color:#aab5c8;margin:5px 0;font-size:12px}footer{border-top:1px solid #e4e8ef;align-items:center;gap:35px;padding:35px 7vw;display:flex}footer p{color:#6b7588;margin:auto;font-size:12px}footer>a{color:var(--blue);font-size:12px;font-weight:800}@media (max-width:900px){.topbar nav{display:none}.startButton{margin-left:auto}.hero{grid-template-columns:1fr;padding-top:55px}.heroVisual{height:430px}.buildingBlocks{grid-template-columns:1fr}.plus{display:none}.concept{min-height:auto}.cnnLab{grid-template-columns:1fr}.flowArrow{transform:rotate(90deg)}.attentionLab{grid-template-columns:1fr}.processorTrack,.quizGrid{grid-template-columns:1fr;gap:55px}.hardwareMap{flex-wrap:wrap;justify-content:center}.hero h1{letter-spacing:-2px}.sectionHead h2{letter-spacing:-1px}}@media (max-width:560px){.lesson{padding:70px 20px}.hero{padding:50px 20px}.heroActions{flex-wrap:wrap}.classMeta{display:none}.heroVisual{margin-left:-30px;margin-right:-30px;transform:scale(.82)}.cnnLab{gap:12px}.compareCards{grid-template-columns:1fr}.machineCore{margin:40px 0}.scoreBoard{flex-direction:column;align-items:flex-start}footer{text-align:center;flex-direction:column}.topbar{padding:0 18px}.startButton{padding:10px;font-size:12px}.teacherTip{flex-direction:column;align-items:flex-start}}