@font-face{font-family:Archivo;src:url('../Archivo.ttf') format('truetype');font-weight:100 900;font-stretch:62% 125%;font-style:normal;font-display:swap}
:root{--paper:#eef0e9;--surface:#fff;--ink:#151515;--muted:#565c50;--line:#cdd3c5;--orange:#f54c27;--lime:#c3ff42;--ease:cubic-bezier(.16,1,.3,1);font-family:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-size:15px;line-height:1.7;font-synthesis:none;accent-color:var(--ink)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0}h1,h2,h3,h4,p{margin:0}h1,h2{font-weight:750;letter-spacing:-.04em}h2{font-size:42px;line-height:1.3}p{color:var(--muted)}a{color:inherit;text-decoration:none}button,input{font:inherit;color:inherit}button{cursor:pointer}button,a,[role=button]{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}svg{fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}button:focus-visible,a:focus-visible,[role=button]:focus-visible,summary:focus-visible{outline:3px solid #4e6e27;outline-offset:5px}::selection{background:var(--lime);color:var(--ink)}[hidden]{display:none!important}::-webkit-scrollbar{width:9px;height:9px}::-webkit-scrollbar-track{background:var(--paper)}::-webkit-scrollbar-thumb{background:#aeb6a2;border:2px solid var(--paper);border-radius:9px}.section-wrap{width:100%;max-width:1320px;margin:0 auto;padding:0 40px}
.site-header{display:flex;align-items:center;gap:40px;position:sticky;top:0;z-index:30;max-width:1400px;margin:auto;padding:22px 40px;background:var(--paper);border-bottom:1px solid transparent}.site-header.scrolled{border-color:var(--line)}.brand{display:flex;align-items:center}.brand strong{font:850 30px/1.2 Archivo,sans-serif;letter-spacing:-.04em}.main-nav{display:flex;align-items:center;gap:30px;margin-left:auto;font-size:13px;font-weight:600}.main-nav a{padding:8px 0;position:relative}.main-nav a:after{content:'';position:absolute;left:0;right:0;bottom:3px;height:1px;background:var(--ink);transform:scaleX(0);transform-origin:left;transition:transform .2s var(--ease)}.main-nav a:hover:after,.main-nav a[aria-current=location]:after{transform:scaleX(1)}.header-actions{display:flex;align-items:center;gap:18px}.account-link{display:inline-flex;align-items:center;gap:8px;border:1px solid #aeb6a2;border-radius:999px;font-size:12px;font-weight:600;min-height:42px;padding:8px 16px;white-space:nowrap;transition:background .2s}.account-link:hover{background:var(--lime)}.account-link svg{width:16px;height:16px}.language-switch{display:flex;align-items:center;gap:2px;font:600 12px/1.4 Archivo,"PingFang SC",sans-serif}.language-switch button{border:0;background:none;min-height:44px;min-width:37px;padding:8px 7px;color:var(--muted);border-radius:999px}.language-switch button[aria-pressed=true]{background:var(--ink);color:white}.menu-toggle{display:none}.mobile-menu{position:fixed;z-index:40;top:74px;left:16px;right:16px;background:var(--ink);color:white;padding:10px 20px;border-radius:18px}.mobile-menu a{display:block;padding:14px 0;border-bottom:1px solid #ffffff29}.mobile-menu a:last-child{border:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:16px;min-height:48px;padding:12px 23px;border-radius:999px;border:1px solid #aeb6a2;background:transparent;font-size:14px;font-weight:600;white-space:nowrap;line-height:1.5;transition:background .2s,color .2s}.btn svg,.text-link svg{width:20px;height:20px}.btn.primary{background:var(--ink);color:white;border-color:var(--ink)}.btn.primary:hover{background:#343c2b}.btn:disabled{cursor:default;opacity:.5}.text-link{display:inline-flex;gap:9px;align-items:center;min-height:44px;font-size:13px;font-weight:600}.text-link:hover{text-decoration:underline;text-underline-offset:6px}.icon-button{display:grid;place-content:center;border:1px solid var(--line);border-radius:50%;height:44px;width:44px;background:none}.icon-button svg{height:18px;width:18px}
.hero{position:relative;display:grid;grid-template-columns:.9fr 1.25fr;align-items:center;max-width:1320px;min-height:665px;margin:14px auto 0;background:var(--surface);border-radius:32px;padding:28px 22px 28px 55px;gap:10px;overflow:hidden}.hero-copy{position:relative;z-index:2;pointer-events:none}.hero-copy a{pointer-events:auto}.hero h1{font-size:88px;line-height:1.22}.fun-word{display:inline-block;background:var(--lime);border-radius:999px;padding:0 15px 7px;line-height:1.05;transform:rotate(-5deg);margin-left:4px}.hero-actions{display:flex;gap:28px;align-items:center;margin-top:40px}.hero:lang(en) h1{font-family:Archivo,sans-serif;font-size:88px;line-height:1.05;letter-spacing:-.04em}.hero:lang(en) .fun-word{padding:0 16px 8px;margin:0 0 0 0}.hero:lang(en) .hero-copy{align-self:center}
.cube-stage{position:relative;width:100%;height:585px;cursor:grab;touch-action:pan-y;user-select:none;isolation:isolate;outline-offset:-6px!important}.cube-stage.dragging{cursor:grabbing}.rubik-canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.cube-shadow{position:absolute;left:50%;bottom:9%;width:58%;height:28px;background:#617052;opacity:.1;border-radius:50%;filter:blur(18px);transform:translateX(-50%);pointer-events:none}
.tools-section{padding-top:54px;padding-bottom:76px}.tool-filter{display:flex;gap:5px;align-items:center;flex-wrap:wrap;margin:0 0 20px}.tool-filter button{border:0;border-radius:999px;min-height:44px;padding:9px 18px;font-size:13px;background:none;color:var(--muted);font-weight:600;white-space:nowrap}.tool-filter button[aria-pressed=true]{background:var(--ink);color:white}.tool-filter button:hover:not([aria-pressed=true]){background:#e3e7dc}.tools-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:18px}.tool-card{grid-column:span 4;min-width:0;position:relative;border-radius:26px;padding:29px 30px 23px;display:flex;flex-direction:column;min-height:408px;overflow:hidden}.tool-card:nth-child(-n+2){grid-column:span 6;min-height:440px}.tool-card.pack{background:var(--ink);color:white}.tool-card.ruler{background:var(--lime)}.tool-card.reply{background:#f7b8a0}.tool-card.script{background:white}.tool-card.views{background:#1b3327;color:var(--lime)}.product-category{font-size:12px;font-weight:550;color:inherit;opacity:.8}.tool-card h3{font-size:31px;font-weight:750;line-height:1.2;letter-spacing:-.03em;margin:11px 0 10px;overflow-wrap:anywhere}.tool-card p{font-size:13px;line-height:1.8;max-width:31ch;color:inherit}.tool-card.pack h3,.tool-card.ruler h3{font-size:38px}.tool-card:lang(en) h3{font-family:Archivo,sans-serif;font-size:31px;line-height:1.12}.tool-card.pack:lang(en) h3{font-size:36px}.card-bottom{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:auto;padding-top:14px}.card-version{font:500 12px/1.4 Archivo,sans-serif;color:inherit;opacity:.8;font-variant-numeric:tabular-nums}.product-open{display:flex;gap:12px;align-items:center;border:0;background:none;padding:0;min-height:42px;color:inherit;font-size:13px;font-weight:650}.product-open:after{position:absolute;inset:0;content:'';border-radius:26px}.product-open svg{width:37px;height:37px;border:1px solid currentColor;border-radius:50%;padding:10px;transition:transform .25s var(--ease),background .25s}.tool-card:hover .product-open svg{transform:rotate(45deg)}.product-open:focus-visible{outline:none}.tool-card:has(.product-open:focus-visible){outline:3px solid #6f8c37;outline-offset:5px}.product-art{height:205px;position:relative;margin:13px -12px 3px;display:grid;place-content:center;pointer-events:none;isolation:isolate}.pack .product-art,.ruler .product-art{height:237px;margin-top:0}.product-art svg{overflow:visible;stroke-width:3;stroke-linejoin:miter;stroke-linecap:butt}.box-art{width:264px;height:218px;color:var(--orange);transform:rotate(-8deg);transition:transform .45s var(--ease)}.box-art .art-lid{transform-origin:130px 48px;transition:transform .45s var(--ease)}.ruler-art{width:274px;height:215px;transform:rotate(7deg);transition:transform .45s var(--ease)}.ruler-art text{fill:currentColor;stroke:none;font:650 23px Archivo,sans-serif}.ruler-art .measurement{stroke-width:2}.chat-art{position:relative;width:255px;height:170px;transform:rotate(-7deg);transition:transform .4s var(--ease)}.chat-art>span{position:absolute;display:flex;align-items:center;justify-content:center;border-radius:17px;min-width:164px;min-height:72px;padding:14px 21px;background:#fff9f3;color:var(--ink);font-size:24px;font-weight:700}.chat-art>span:first-child{top:0;left:0}.chat-art>span:last-child{bottom:0;right:0;background:var(--ink);color:var(--lime);transform:rotate(8deg)}.chat-art>span:after{content:'';position:absolute;width:18px;height:18px;bottom:-8px;left:24px;background:inherit;clip-path:polygon(0 0,100% 0,0 100%)}.type-art{font-family:Archivo,sans-serif;font-weight:800;font-size:162px;line-height:1;letter-spacing:-.04em;transform:rotate(-6deg);transition:transform .4s var(--ease);white-space:nowrap}.type-art span:last-child{color:var(--orange);display:inline-block;transition:transform .4s var(--ease)}.views-art{width:270px;height:185px;transform:rotate(-8deg);transition:transform .4s var(--ease)}.views-art .view-square{transform-origin:center;transition:transform .4s var(--ease)}.loading{grid-column:1/-1;padding:45px 0;font-size:15px}.loading button{margin-top:12px}
.course-section{padding:65px 0;background:#e5e9dd}.course-layout{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1fr);align-items:center;gap:76px}.course-poster{position:relative;min-height:520px;padding:30px;background:var(--orange);color:var(--ink);border-radius:26px;cursor:pointer;overflow:hidden;user-select:none;transform:perspective(1100px) rotateX(var(--poster-x,0deg)) rotateY(var(--poster-y,0deg));transition:background .3s,transform .3s var(--ease);touch-action:pan-y}.poster-cross{position:absolute;right:28px;top:28px;width:26px;height:26px}.poster-cross svg{height:100%;width:100%}.ai-composition{position:absolute;inset:50px 25px 70px;display:grid;place-content:center;transform:rotate(-10deg);transition:transform .55s var(--ease)}.ai-letter{font:750 270px/1 Archivo,sans-serif;letter-spacing:-.04em;transition:opacity .25s,transform .5s var(--ease);transform-origin:center}.poster-selection{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:79%;height:87%;border:1px solid var(--ink);transition:opacity .2s}.poster-selection i{position:absolute;width:9px;height:9px;background:white;border:1px solid var(--ink)}.poster-selection i:nth-child(1){left:-5px;top:-5px}.poster-selection i:nth-child(2){right:-5px;top:-5px}.poster-selection i:nth-child(3){left:-5px;bottom:-5px}.poster-selection i:nth-child(4){right:-5px;bottom:-5px}.poster-cursor{position:absolute;width:62px;height:73px;bottom:3px;right:3px;transform:translate(var(--cursor-x,0px),var(--cursor-y,0px));transition:transform .15s linear}.poster-cursor svg{height:100%;width:100%;fill:var(--lime);stroke:var(--ink);stroke-width:1.4}.poster-wordmark{position:absolute;bottom:30px;left:30px;font:750 17px/1 Archivo,sans-serif}.ai-path{position:absolute;width:100%;height:100%;inset:0;stroke-width:2;stroke:var(--ink);opacity:0;transform:scale(.92);transition:opacity .25s,transform .55s var(--ease)}.ai-path .path-nodes{fill:white;stroke-width:1.4}.course-poster.outlined .ai-letter{opacity:0;transform:scale(.92)}.course-poster.outlined .ai-path{opacity:1;transform:scale(1)}.course-poster.outlined .poster-selection{opacity:0}.course-poster.outlined .ai-composition{transform:rotate(0)}.course-poster.outlined .poster-cursor svg{fill:var(--orange)}.course-copy h2{font-size:42px}.course-copy h3{font-size:23px;line-height:1.4;margin-top:30px;letter-spacing:-.02em}.course-copy>p{font-size:14px;line-height:1.9;margin-top:13px;max-width:40ch}.course-facts{margin-top:15px;font-size:13px;color:var(--muted)}.course-actions{display:flex;align-items:center;gap:23px;flex-wrap:wrap;margin-top:28px}.curriculum{margin-top:29px;border-top:1px solid #bcc5ae;border-bottom:1px solid #bcc5ae;padding:14px 0}.curriculum summary{display:flex;align-items:center;justify-content:space-between;gap:20px;cursor:pointer;list-style:none;font-size:14px;font-weight:600;min-height:36px}.curriculum summary::-webkit-details-marker{display:none}.curriculum summary svg{width:20px;height:20px}.curriculum[open] summary svg{transform:rotate(45deg)}.curriculum ol{padding:0;list-style:none;margin:18px 0 4px;max-height:305px;overflow:auto}.curriculum li{display:flex;gap:15px;border-top:1px solid #cbd2c2;padding:11px 0;font-size:13px;line-height:1.6}.curriculum li>span:first-child{font-family:Archivo,sans-serif;color:var(--muted);width:22px;flex-shrink:0}
.studio-section{display:grid;grid-template-columns:.95fr 1fr;gap:70px;align-items:center;padding-top:85px;padding-bottom:75px}.studio-copy h2{font-size:36px}.paper-studies{height:270px;position:relative;max-width:430px;margin:auto}.study{position:absolute;width:175px;height:215px;padding:20px;display:flex;flex-direction:column;justify-content:space-between}.study-one{left:25px;top:25px;transform:rotate(-10deg);background:white}.study-one>span{font:800 31px/.95 Archivo,sans-serif;letter-spacing:-.04em}.study-one svg{width:55px;height:55px;align-self:flex-end;stroke-width:1}.study-two{right:25px;top:7px;transform:rotate(10deg);background:var(--lime)}.study-two>span{font:750 12px/1 Archivo,sans-serif}.arc-print{position:relative;width:130px;height:130px;border-radius:50%;border:1px solid var(--ink)}.arc-print:before,.arc-print:after{content:'';position:absolute;inset:20px;border:1px solid var(--ink);border-radius:50%}.arc-print:after{inset:40px}.studio-empty{text-align:center;margin-top:8px;font-size:12px}.contact-section{display:grid;grid-template-columns:170px minmax(0,1fr) minmax(260px,.9fr);align-items:center;gap:35px;background:var(--lime);border-radius:28px;padding:43px 48px;margin-top:10px;margin-bottom:55px;max-width:1240px}.contact-graphic svg{width:150px;height:140px;stroke-width:1.5}.contact-action>.btn{min-width:230px;justify-content:space-between}.wechat-line{display:flex;align-items:center;gap:12px;font-size:12px;margin-top:16px}.wechat-line button{padding:4px 0;border:0;background:none;font:600 14px/1.5 Archivo,sans-serif;min-height:34px;user-select:all}.contact-action>p{font-size:12px;color:var(--ink);margin-top:5px;max-width:32ch}.contact-action>p:empty{display:none}
.site-footer{padding-bottom:30px}.footer-wordmark{font:850 clamp(100px,18vw,250px)/.95 Archivo,sans-serif;letter-spacing:-.04em;display:flex;gap:30px;align-items:center;justify-content:space-between}.footer-wordmark>svg{height:76px;width:76px;stroke-width:3.4}.footer-row{display:flex;align-items:center;justify-content:space-between;gap:25px;border-bottom:1px solid var(--line);padding:30px 0 24px;font-size:12px}.footer-row nav{display:flex;gap:26px}.footer-row a:hover{text-decoration:underline;text-underline-offset:5px}.back-top{min-height:42px;width:42px;display:grid;place-content:center}.back-top svg{width:20px;height:20px}.legal{display:flex;justify-content:space-between;align-items:flex-start;gap:25px;margin-top:20px;font-size:11px;color:var(--muted)}.legal>div{display:flex;gap:25px}.legal a:hover{text-decoration:underline}dialog{border:0;padding:0;border-radius:24px;background:white;color:var(--ink);width:min(680px,calc(100% - 32px));max-height:calc(100dvh - 40px);overflow:auto;overscroll-behavior:contain}dialog::backdrop{background:#141d1899}.dialog-body{padding:40px}.dialog-body h2{font-size:31px;line-height:1.25;padding-right:25px;overflow-wrap:anywhere}.dialog-close{position:absolute;right:16px;top:16px;border:0;width:38px;height:38px;display:grid;place-content:center;border-radius:50%;background:var(--paper)}.dialog-close svg{width:20px;height:20px}.dialog-desc{font-size:14px;line-height:1.9;margin-top:18px}.dialog-features{list-style:none;padding:20px 0;margin:25px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.dialog-features li{display:flex;gap:12px;font-size:14px;line-height:1.8;margin:9px 0}.dialog-features svg{width:16px;height:20px;margin-top:3px}.dialog-meta{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:22px}.dialog-meta>div{padding:14px;border-radius:10px;background:#f1f4eb;font-size:12px}.dialog-meta span{display:block;color:var(--muted);font-size:12px;margin-top:3px}.dialog-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:25px}.dialog-actions .btn{font-size:13px}.dialog-actions .text-link{font-size:12px}.dialog-body details{border-top:1px solid var(--line);margin-top:23px;padding-top:17px}.dialog-body summary{min-height:32px;cursor:pointer;font-size:13px}.dialog-body details p{font-size:13px;line-height:1.9;white-space:pre-line;margin-top:13px}.dialog-contact{background:var(--paper);padding:20px;border-radius:12px;margin-top:22px}.dialog-contact strong{font:650 24px/1.5 Archivo,sans-serif;user-select:all}.dialog-contact p{font-size:13px;margin-top:6px}.copy-feedback{font-size:12px;color:#425f26;margin-top:13px}.copy-feedback:empty{display:none}.toast{position:fixed;left:50%;bottom:24px;z-index:100;background:var(--ink);color:white;border-radius:999px;padding:12px 18px;font-size:13px;max-width:calc(100% - 32px);pointer-events:none;opacity:0;transform:translate(-50%,15px);transition:opacity .2s,transform .2s;box-shadow:0 8px 26px #17201726}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(min-width:1500px){.hero{margin-top:22px;min-height:700px}.hero h1{font-size:96px}.hero:lang(en) h1{font-size:96px}.cube-stage{height:630px}}
@media(max-width:1199px){.section-wrap{padding-left:30px;padding-right:30px}.site-header{padding:20px 30px;gap:25px}.main-nav{gap:20px}.header-actions{gap:12px}.hero{margin-left:24px;margin-right:24px;padding:30px 10px 30px 34px;min-height:590px;grid-template-columns:.86fr 1.14fr}.hero h1{font-size:72px}.hero:lang(en) h1{font-size:74px}.hero-actions{gap:20px;margin-top:32px}.cube-stage{height:520px}.tool-card{padding:26px 25px;min-height:375px}.tool-card:nth-child(-n+2){min-height:410px}.tool-card h3{font-size:27px}.tool-card.pack h3,.tool-card.ruler h3{font-size:32px}.tool-card:lang(en) h3{font-size:27px}.tool-card.pack:lang(en) h3{font-size:31px}.product-art{height:185px}.pack .product-art,.ruler .product-art{height:215px}.chat-art{transform:rotate(-7deg) scale(.85)}.type-art{font-size:135px}.views-art{width:230px;height:165px}.course-layout{gap:45px}.course-poster{min-height:475px}.ai-letter{font-size:230px}.course-copy h2{font-size:36px}.course-copy h3{font-size:21px}.contact-section{margin-left:30px;margin-right:30px;width:calc(100% - 60px);grid-template-columns:115px minmax(0,1fr) minmax(220px,.85fr);gap:25px;padding:36px 32px}.contact-graphic svg{width:110px}.contact-section h2{font-size:35px}.contact-action>.btn{min-width:210px}.studio-section{gap:40px}.studio-copy h2{font-size:32px}.study-one{left:0}.study-two{right:0}.footer-row{gap:15px}.footer-row nav{gap:20px}}
@media(max-width:960px){.site-header{gap:22px}.main-nav{gap:17px;font-size:12px}.brand strong{font-size:27px}.header-actions{gap:7px}.account-link{padding:8px 12px;font-size:12px}.hero{grid-template-columns:.92fr 1.08fr;min-height:540px;padding-left:28px}.hero h1{font-size:60px}.hero:lang(en) h1{font-size:62px}.hero-actions{flex-wrap:wrap;gap:8px 20px;margin-top:27px}.hero-actions .btn{padding:11px 18px;font-size:13px}.cube-stage{height:480px}.tool-card{grid-column:span 6}.tool-card:nth-child(-n+2){min-height:390px}.tool-card:last-child{grid-column:1/-1;min-height:340px;padding-right:50%}.tool-card:last-child .product-art{position:absolute;right:6%;top:50%;width:40%;transform:translateY(-50%);margin:0}.tool-card h3{font-size:29px}.tool-card:lang(en) h3{font-size:28px}.tool-card.pack:lang(en) h3{font-size:29px}.product-art{height:195px}.pack .product-art,.ruler .product-art{height:208px}.course-layout{gap:30px}.course-poster{min-height:430px;padding:24px}.ai-letter{font-size:198px}.ai-composition{inset:50px 12px 65px}.course-copy h2{font-size:32px}.course-copy h3{font-size:19px;margin-top:24px}.course-copy>p{font-size:13px}.course-actions{gap:14px;margin-top:23px}.course-actions .btn{font-size:13px;padding:11px 17px}.course-actions .text-link{font-size:12px}.studio-copy h2{font-size:28px}.paper-studies{height:230px}.study{width:145px;height:190px;padding:17px}.study-one>span{font-size:26px}.arc-print{width:110px;height:110px}.arc-print:before{inset:17px}.arc-print:after{inset:34px}.contact-section{grid-template-columns:85px minmax(0,1fr) minmax(190px,.85fr);padding:32px 27px;gap:18px}.contact-graphic svg{width:85px;height:115px}.contact-section h2{font-size:30px}.contact-action>.btn{min-width:180px;font-size:13px;padding-left:17px;padding-right:17px}.footer-wordmark{gap:20px}.footer-wordmark>svg{height:58px;width:58px}.footer-row nav{gap:17px}.legal>div{gap:15px}}
@media(max-width:760px){html{scroll-padding-top:85px}.section-wrap{padding-left:20px;padding-right:20px}.site-header{padding:16px 20px;gap:16px}.main-nav{display:none}.header-actions{margin-left:auto;gap:12px}.brand strong{font-size:26px}.account-link{min-height:40px}.language-switch button{min-height:44px;min-width:34px}.menu-toggle{display:grid;place-content:center;width:32px;height:40px;border:0;background:none;padding:4px}.menu-toggle svg{width:23px;height:23px}.hero{margin:10px 16px 0;padding:32px 8px 28px 26px;border-radius:26px;min-height:490px;grid-template-columns:1fr 1.15fr;gap:0}.hero h1{font-size:55px}.hero:lang(en) h1{font-size:56px}.hero-actions{margin-top:25px;flex-direction:column;align-items:flex-start;gap:7px}.cube-stage{height:440px}.tools-section{padding-top:34px;padding-bottom:50px}.tool-filter{gap:2px;margin-bottom:16px}.tool-filter button{font-size:12px;padding:8px 13px;min-height:42px}.tools-grid{gap:14px}.tool-card{border-radius:22px;padding:24px;min-height:360px}.tool-card:nth-child(-n+2){min-height:382px}.tool-card h3,.tool-card.pack h3,.tool-card.ruler h3{font-size:27px}.tool-card:lang(en) h3,.tool-card.pack:lang(en) h3{font-size:27px}.tool-card p{font-size:12px}.product-art{height:185px;margin-left:-17px;margin-right:-17px}.box-art{width:230px;height:194px}.ruler-art{width:234px;height:190px}.chat-art{transform:rotate(-7deg) scale(.81)}.product-category,.card-version{font-size:12px}.product-open{font-size:12px}.product-open svg{width:34px;height:34px;padding:9px}.type-art{font-size:125px}.course-section{padding:48px 0}.course-layout{gap:26px}.course-poster{min-height:410px;border-radius:22px;padding:22px}.ai-letter{font-size:175px}.ai-composition{inset:60px 7px 75px}.poster-cursor{width:47px;height:55px;right:0;bottom:8px}.poster-wordmark{left:23px;bottom:27px;font-size:14px}.poster-cross{right:22px;top:22px;height:22px;width:22px}.course-copy h2{font-size:29px}.course-copy h3{font-size:18px}.course-copy>p{font-size:13px}.course-facts{font-size:12px}.course-actions{gap:10px;flex-wrap:wrap}.course-actions .text-link{font-size:12px}.course-actions .icon-button{width:40px;height:40px}.curriculum{margin-top:20px}.curriculum summary{font-size:13px}.studio-section{padding-top:55px;padding-bottom:50px;gap:28px}.studio-copy h2{font-size:26px}.paper-studies{height:210px}.study{width:125px;height:175px;padding:15px}.study-one>span{font-size:24px}.arc-print{width:95px;height:95px}.arc-print:before{inset:15px}.arc-print:after{inset:30px}.contact-section{width:calc(100% - 40px);margin:5px 20px 40px;grid-template-columns:80px 1fr;gap:22px;padding:30px 25px;border-radius:23px}.contact-section h2{font-size:32px}.contact-action{grid-column:2}.contact-action>.btn{min-width:220px}.footer-wordmark{font-size:17vw}.footer-wordmark>svg{width:43px;height:43px}.footer-row{flex-wrap:wrap;font-size:12px;gap:15px;padding:22px 0}.footer-row nav{order:3;width:100%;gap:25px}.back-top{margin-left:auto}.legal{flex-wrap:wrap;font-size:11px;gap:12px}.legal>div{gap:10px 20px;flex-wrap:wrap}.dialog-body{padding:32px}.dialog-body h2{font-size:28px}.dialog-close{top:13px;right:13px}}
@media(max-width:580px){.site-header{padding:14px 18px;gap:10px}.brand strong{font-size:25px}.header-actions{gap:8px}.account-link{font-size:11px;padding:7px 11px;gap:5px;min-height:38px}.account-link svg{width:14px;height:14px}.language-switch{gap:0;font-size:11px}.language-switch button{min-width:31px;min-height:44px;padding:7px 6px}.menu-toggle{width:26px}.hero{grid-template-columns:1fr;gap:0;min-height:0;padding:31px 23px 12px}.hero h1{font-size:70px;line-height:1.18}.hero:lang(en) h1{font-size:68px;line-height:1.04}.hero-copy{padding-left:1px}.hero-actions{flex-direction:row;align-items:center;gap:22px;margin-top:28px}.hero-actions .btn{min-height:44px;padding:11px 18px;font-size:13px}.hero-actions .text-link{font-size:12px}.cube-stage{width:calc(100% + 32px);margin-left:-16px;height:420px;margin-top:6px}.cube-shadow{bottom:12%;width:70%}.tools-section{padding-top:31px}.tool-filter{justify-content:space-between;gap:1px}.tool-filter button{padding:8px 10px;font-size:12px}.tool-card,.tool-card:nth-child(-n+2),.tool-card:last-child{grid-column:1/-1;min-height:388px;padding:26px}.tool-card:last-child .product-art{position:relative;top:auto;right:auto;transform:none;width:auto;height:205px;margin:12px -10px 2px}.tool-card h3,.tool-card.pack h3,.tool-card.ruler h3{font-size:32px}.tool-card:lang(en) h3,.tool-card.pack:lang(en) h3{font-size:31px}.tool-card p{font-size:13px;max-width:28ch}.product-art,.pack .product-art,.ruler .product-art{height:210px;margin-top:8px}.box-art{width:262px;height:210px}.ruler-art{width:268px;height:210px}.chat-art,.type-art{font-size:160px}.views-art{width:268px;height:185px}.card-bottom{padding-top:10px}.product-open{font-size:13px}.product-open svg{width:38px;height:38px;padding:10px}.course-layout{grid-template-columns:1fr;gap:29px}.course-poster{min-height:405px;padding:26px;border-radius:24px}.ai-composition{inset:46px 25px 65px}.ai-letter{font-size:233px}.poster-selection{height:87%;width:78%}.poster-cursor{width:52px;height:62px;bottom:0;right:0}.poster-wordmark{bottom:26px;left:26px}.course-copy h2{font-size:35px}.course-copy h3{font-size:21px;margin-top:24px}.course-copy>p{font-size:14px;max-width:36ch}.course-actions{gap:19px;margin-top:23px}.course-actions .text-link{font-size:13px}.course-actions .btn{font-size:13px}.course-actions .icon-button{margin-left:auto}.curriculum{margin-top:23px}.curriculum summary{font-size:14px}.studio-section{grid-template-columns:1fr;gap:20px;padding-top:50px}.studio-copy h2{font-size:31px}.paper-studies{max-width:350px;height:255px}.study{width:160px;height:205px;padding:19px}.study-one{left:15px;top:24px}.study-two{right:15px;top:10px}.study-one>span{font-size:30px}.arc-print{height:120px;width:120px}.arc-print:before{inset:18px}.arc-print:after{inset:36px}.contact-section{grid-template-columns:65px 1fr;gap:20px;padding:28px 23px}.contact-graphic svg{width:65px;height:100px}.contact-section h2{font-size:31px}.contact-action{grid-column:1/-1;padding-left:85px}.contact-action>.btn{min-width:185px;font-size:12px}.wechat-line{gap:10px}.wechat-line button{font-size:13px}.contact-action>p{font-size:12px}.footer-wordmark{font-size:18vw;gap:12px}.footer-wordmark>svg{height:35px;width:35px}.footer-row nav{gap:21px;font-size:11px}.legal>div{flex-direction:column;gap:7px}.dialog-body{padding:29px 24px}.dialog-body h2{font-size:26px}.dialog-meta{grid-template-columns:1fr}.dialog-actions{gap:14px}.dialog-actions .btn{padding:11px 18px}.dialog-body .dialog-desc{font-size:13px}.dialog-features li{font-size:13px}}
@media(max-width:370px){.site-header{padding-left:15px;padding-right:15px}.brand strong{font-size:23px}.header-actions{gap:5px}.account-link{padding-left:9px;padding-right:9px}.hero{margin-left:12px;margin-right:12px;padding-left:21px;padding-right:21px}.hero h1{font-size:63px}.hero:lang(en) h1{font-size:61px}.tool-filter button{font-size:11px;padding-left:8px;padding-right:8px}.cube-stage{height:380px}.contact-action{padding-left:0}}
@media(min-width:761px){.mobile-menu{display:none!important}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

.tools-grid.filtered .tool-card{grid-column:span 6}@media(max-width:580px){.tools-grid.filtered .tool-card{grid-column:1/-1}}

/* The guide cage and layer rotation live in one depth-tested canvas. */
.hero-traces{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;stroke:#bfcbb3;stroke-width:1;opacity:.58}
.trace-lines{fill:none;stroke-dasharray:2 7}.trace-corners{fill:none;opacity:.7}.trace-packet{stroke:none;fill:var(--orange);animation:signal-route-one 8.5s linear infinite;animation-play-state:paused;opacity:0}
.trace-packet-two{fill:#8ea976;animation-name:signal-route-two;animation-duration:10.5s;animation-delay:-3s}.trace-packet-three{fill:var(--orange);animation-name:signal-route-three;animation-duration:11.5s;animation-delay:-6s}
.hero.is-inview .trace-packet{animation-play-state:running}
.ambient-paused .trace-packet,.page-hidden .trace-packet{animation-play-state:paused!important}
@keyframes signal-route-one{0%{transform:translate(66px,156px);opacity:0}10%{opacity:.9}30%{transform:translate(66px,83px)}67%{transform:translate(256px,83px)}78%{transform:translate(291px,118px);opacity:.9}95%,100%{transform:translate(411px,118px);opacity:0}}
@keyframes signal-route-two{0%{transform:translate(57px,560px);opacity:0}12%{opacity:1}50%{transform:translate(193px,560px)}66%{transform:translate(225px,592px);opacity:1}94%,100%{transform:translate(347px,592px);opacity:0}}
@keyframes signal-route-three{0%{transform:translate(1035px,70px);opacity:0}15%{opacity:1}67%{transform:translate(1191px,70px);opacity:1}95%,100%{transform:translate(1191px,135px);opacity:0}}
.ambient-field{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;stroke:#a1b19a;stroke-width:1;opacity:.23}
.field-brackets{opacity:.65}.field-orbit{stroke-dasharray:3 11;animation:field-trace 18s linear infinite;animation-play-state:paused}.field-orbit-two{stroke-dasharray:1 15;animation-duration:24s;animation-direction:reverse}.field-nodes{fill:#81976d;stroke:none;animation:field-nodes 7.2s ease-in-out infinite;animation-play-state:paused}
.hero.is-inview .field-orbit,.hero.is-inview .field-nodes{animation-play-state:running}
.cube-stage:hover .ambient-field *,.cube-stage:focus-visible .ambient-field *,.ambient-paused .ambient-field *,.page-hidden .ambient-field *{animation-play-state:paused!important}
.rubik-fallback{position:absolute;width:195px;height:195px;left:50%;top:50%;transform:translate(-50%,-50%) rotateX(-22deg) rotateY(-32deg);transform-style:preserve-3d;display:none;pointer-events:none}
.cube-stage[data-renderer=fallback]{perspective:1000px}.cube-stage[data-renderer=fallback] .rubik-canvas{display:none}.cube-stage[data-renderer=fallback] .rubik-fallback{display:block}
.fallback-face{position:absolute;inset:0;background:#252b27;padding:3px;display:grid;grid-template-columns:repeat(3,1fr);gap:3px;backface-visibility:hidden}
.fallback-face i{border-radius:4px;background:var(--orange)}.fallback-face.front{transform:translateZ(97.5px)}.fallback-face.right{transform:rotateY(90deg) translateZ(97.5px)}.fallback-face.right i{background:var(--lime)}.fallback-face.top{transform:rotateX(90deg) translateZ(97.5px)}.fallback-face.top i{background:#3159e8}
.fallback-label{position:absolute;z-index:1;left:18px;top:24px;font:900 76px/.82 Archivo,sans-serif;letter-spacing:-.04em;color:#151515}.fallback-face.right .fallback-label{font:650 12px/1.2 Archivo,sans-serif;transform:rotate(-90deg);transform-origin:96px 88px;white-space:nowrap;top:0;left:0}.fallback-face.top .fallback-label{font:750 13px/1.3 Archivo,sans-serif;left:30px;top:75px}.fallback-face.right i{background:#db492a}.fallback-face.top i{background:#ffb39b}
.motion-toggle{position:absolute;right:14px;top:14px;z-index:5;display:grid;place-content:center;width:42px;height:42px;padding:12px;border:0;border-radius:50%;background:transparent;color:#687360;transition:background .2s}
.motion-toggle:hover{background:var(--paper)}.motion-toggle svg{width:17px;height:17px}.motion-play{display:none}.ambient-paused .motion-pause{display:none}.ambient-paused .motion-play{display:block}.motion-toggle:disabled{opacity:.5;cursor:default}
@keyframes field-trace{to{stroke-dashoffset:-140}}
@keyframes field-nodes{0%,100%{opacity:.45;transform:translateY(0)}50%{opacity:1;transform:translateY(-4px)}}
/* Each product tells a short visual story in response to intent. */
.box-front,.box-side,.art-lid,.ruler-body,.ruler-h,.ruler-v,.ruler-cross,.view-main,.view-front,.view-side,.view-scan{transform-box:fill-box;transform-origin:center}
.art-lid{transform-origin:50% 70%}.box-guide{opacity:0;stroke:#ffb69e;stroke-width:1.4;stroke-dasharray:4 7;fill:none}.ruler-cross{opacity:0;stroke-width:1.4}.type-art{position:relative}.type-art>span{display:inline-block}.type-guides{position:absolute;width:105%;height:75%;left:-2.5%;top:22%;color:#71806a;opacity:0;stroke-dasharray:4 7;stroke-width:1;pointer-events:none}.view-scan{opacity:0;stroke:#ecf1e6;stroke-width:1.5;stroke-dasharray:3 4}
.message-copy{position:relative}.typing{position:absolute;inset:0;display:flex;gap:9px;align-items:center;justify-content:center}.typing i{display:block;width:7px;height:7px;border-radius:50%;background:var(--lime);opacity:0}.chat-tick{position:absolute;left:calc(50% - 15px);top:calc(50% - 15px);width:30px;height:30px;stroke:var(--lime);stroke-width:2;opacity:0;transform-origin:center}
/* Seven deliberate palette states. Foil is a light-reactive material, not an idle rainbow loop. */
.course-poster{--poster-color:#f54c27;--poster-ink:#151515;--poster-accent:#c3ff42;--poster-node:#fff;background:var(--poster-color);color:var(--poster-ink);transition:background-color .55s,color .35s,transform .3s var(--ease)}
.course-poster[data-palette="1"]{--poster-color:#c3ff42;--poster-accent:#f54c27}
.course-poster[data-palette="2"]{--poster-color:#164cfa;--poster-ink:#fff;--poster-accent:#c3ff42;--poster-node:#164cfa}
.course-poster[data-palette="3"]{--poster-color:#ff5fa2;--poster-accent:#151515}
.course-poster[data-palette="4"]{--poster-color:#682be3;--poster-ink:#fff;--poster-accent:#c3ff42;--poster-node:#682be3}
.course-poster[data-palette="5"]{--poster-color:#7ef4dd;--poster-accent:#f54c27}
.course-poster[data-palette="6"]{--poster-color:#e0e5f1;--poster-accent:#682be3}
.course-poster:before{content:'';position:absolute;inset:0;background:linear-gradient(125deg,#eaf8ed 0%,#b7f0ff 17%,#e0c5ff 34%,#fffbc5 51%,#bbf5d6 66%,#f6cde9 82%,#e2eaf7 100%);background-size:210% 210%;background-position:calc(50% + var(--foil-x,0%)) calc(50% + var(--foil-y,0%));opacity:0;transition:opacity .55s,background-position .25s;pointer-events:none}
.course-poster:after{content:'';position:absolute;width:80%;height:160%;left:-70%;top:-30%;background:linear-gradient(90deg,transparent 10%,#ffffff00 28%,#ffffffa8 50%,#ffffff00 72%,transparent);transform:translateX(-120%) rotate(-25deg);pointer-events:none;opacity:0}
.course-poster[data-palette="6"]:before{opacity:1}.course-poster[data-palette="6"]:after{opacity:.8;animation:foil-arrive 1.8s var(--ease) 1 forwards}
.course-poster .ai-composition{z-index:1}.course-poster .poster-cross,.course-poster .poster-wordmark{z-index:2}.course-poster .ai-path{stroke:var(--poster-ink)}.course-poster .path-nodes{fill:var(--poster-node)}.course-poster .poster-selection,.course-poster .poster-selection i{border-color:var(--poster-ink)}.course-poster .poster-selection i{background:var(--poster-node)}.course-poster .poster-cursor svg,.course-poster.outlined .poster-cursor svg{stroke:var(--poster-ink);fill:var(--poster-accent)}
@keyframes foil-arrive{from{transform:translateX(-120%) rotate(-25deg)}to{transform:translateX(330%) rotate(-25deg)}}
.poster-cursor svg{animation:cursor-float 4.2s ease-in-out infinite;animation-play-state:paused;transform-origin:15% 15%}
.course-poster.is-inview .poster-cursor svg{animation-play-state:running}
.ambient-paused .poster-cursor svg,.page-hidden .poster-cursor svg{animation-play-state:paused!important}
@keyframes cursor-float{0%,100%{transform:translate(0,0) rotate(0deg)}50%{transform:translate(-4px,-12px) rotate(-5deg)}}
@media(prefers-reduced-motion:reduce){.ambient-field *,.course-poster:after,.trace-packet,.poster-cursor svg{animation:none!important}.course-poster:after,.trace-packet{opacity:0}}


/* Existing catalog content: only visible when additional courses or works are published. */
.course-options{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0 12px}
.course-options button{border:1px solid var(--line);border-radius:999px;padding:8px 14px;min-height:40px;background:transparent;font-size:13px}
.course-options button[aria-pressed=true]{background:var(--ink);color:white;border-color:var(--ink)}
.portfolio-grid{grid-column:1/-1;display:grid;gap:45px;min-width:0}
.portfolio-category>h3{font-size:25px;line-height:1.4;margin:0 0 20px}
.portfolio-items{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:30px}
.portfolio-item{min-width:0}
.portfolio-item>button{border:0;padding:0;position:relative;width:100%;display:block;aspect-ratio:3/2;overflow:hidden;border-radius:24px;background:white;text-align:left}
.portfolio-item>button>img{width:100%;height:100%;object-fit:cover;display:block}
.portfolio-item>button>svg{position:absolute;right:16px;bottom:16px;background:var(--paper);border-radius:50%;width:40px;height:40px;padding:10px}
.portfolio-no-image{display:grid;place-content:center;height:100%;padding:30px;font-size:26px;font-weight:700;color:var(--ink)}
.portfolio-item h4{font-size:19px;margin:18px 0 8px;overflow-wrap:anywhere}
.portfolio-item p{font-size:14px;line-height:1.8;overflow-wrap:anywhere}
.portfolio-media{display:grid;gap:18px;margin-top:26px}
.portfolio-media img,.portfolio-media video{max-width:100%;width:100%;display:block;border-radius:12px}

.tool-card h3,.tool-card p,#course-name,#course-description{overflow-wrap:anywhere}