:root{color-scheme:light;--bg:#f6f5ef;--paper:#fffefa;--ink:#243f39;--green:#286b58;--line:#dce4dc;--muted:#62756d}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;line-height:1.65}button,input,select{font:inherit}a{color:inherit;text-decoration:none}button,a,input,select{outline-offset:5px}button{cursor:pointer}button:disabled,[aria-disabled=true]{cursor:default}header,main,footer{width:min(1120px,calc(100% - 48px));margin:auto}.site-header{display:flex;align-items:center;justify-content:space-between;padding:30px 0}.brand{display:inline-flex;align-items:center;gap:9px;font-size:15px}.brand svg{width:25px;height:25px;fill:var(--bg);stroke:var(--green);stroke-width:1.5}.text-button{border:0;background:none;color:var(--green);min-height:44px;padding:8px}.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:72px;align-items:center;min-height:620px;padding:32px 0 68px}.eyebrow{color:var(--green);font-size:14px;letter-spacing:.08em}h1{font-family:Georgia,"Songti SC",SimSun,serif;font-size:clamp(40px,5vw,64px);font-weight:400;line-height:1.2;margin:20px 0}.lead{font-size:22px;max-width:24em}.intro{color:var(--muted);max-width:30em}.stores{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}.store{background:var(--ink);color:white;padding:13px 20px;border-radius:13px;min-width:176px;display:flex;flex-direction:column}.store span{font-weight:600;font-size:16px}.store small{opacity:.8;font-size:13px}.store-note,.language-note{font-size:13px;color:var(--muted)}.puzzle-preview{background:var(--paper);padding:32px;border:1px solid var(--line);border-radius:30px;box-shadow:0 18px 55px #24423709}.preview-label{color:var(--green);font-size:13px}.preview-question{font-size:17px}.number-demo{display:grid;grid-template-columns:1fr 36px 1fr;text-align:center;align-items:center;gap:12px;font-size:42px;padding:20px 0;font-family:Georgia,serif}.number-demo i{font-style:normal;font-size:24px;color:var(--muted)}#demo{display:flex;gap:10px}#demo input{width:0;flex:1;min-width:0;border:1px solid var(--line);border-radius:12px;text-align:center;background:transparent;font-size:24px;color:var(--ink)}#demo button,.primary{background:var(--green);color:white;padding:12px 20px;border:0;border-radius:12px;min-height:48px}#demo-feedback{min-height:52px;font-size:17px;margin:12px 0;color:var(--green)}.preview-foot{font-size:12px;color:var(--muted)}.features{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;border-top:1px solid var(--line);padding:40px 0}.features article>span{font-size:13px;color:var(--green)}.features h2{font-size:22px;font-weight:500}.features p{color:var(--muted);font-size:16px}footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;padding:28px 0;margin-top:42px;font-size:13px;color:var(--muted)}footer nav{display:flex;gap:20px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.document{max-width:760px;padding:40px 0}.document h1{font-size:36px}.document h2{font-size:22px;margin-top:32px}.admin-head{display:flex;justify-content:space-between;align-items:center;gap:16px}.admin-head h1{font-size:32px}.admin-login{max-width:480px;margin:60px auto;padding:28px;border:1px solid var(--line);border-radius:20px;background:var(--paper)}.admin-login label{display:block}.admin-login input{width:100%;padding:12px;border:1px solid var(--line);border-radius:10px;margin:10px 0 18px}.admin-tools{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.admin-tools select,.admin-tools input{padding:10px;border:1px solid var(--line);border-radius:8px;max-width:100%;background:var(--paper);color:var(--ink)}.stats-summary{display:flex;gap:28px;padding:24px 0;flex-wrap:wrap}.stats-summary strong{font-size:28px;display:block}.stats-summary span{font-size:13px;color:var(--muted)}.stats-table{width:100%;border-collapse:collapse;font-size:14px}.stats-table th,.stats-table td{border-bottom:1px solid var(--line);padding:14px 10px;text-align:left}.stats-table th{font-weight:500;color:var(--muted)}.stats-table td small{display:block;color:var(--muted)}.stats-table td:first-child{min-width:150px}.table-wrap{overflow-x:auto}#status{min-height:28px;color:#a33d2b}[hidden]{display:none!important}@media(max-width:900px){.hero{gap:28px;min-height:540px}.stores{gap:10px}.store{min-width:150px;padding:12px 15px}.puzzle-preview{padding:24px}.features{gap:24px}.lead{font-size:20px}}@media(max-width:600px){header,main,footer{width:calc(100% - 36px)}.site-header{padding:18px 0}.hero{grid-template-columns:1fr;gap:26px;padding:12px 0 36px;min-height:0}h1{font-size:44px;margin:16px 0}.lead{font-size:21px}.intro{font-size:15px}.stores{flex-wrap:nowrap;margin-top:24px}.store{min-width:0;flex:1;padding:12px}.store span{font-size:14px}.store-note{font-size:12px}.puzzle-preview{padding:24px}.number-demo{font-size:36px}.features{grid-template-columns:1fr;gap:16px;padding:28px 0}.features h2{margin:6px 0}.features p{margin:8px 0}footer{flex-direction:column;gap:10px}.admin-head h1{font-size:26px}.admin-tools label{width:100%}.admin-tools input{width:100%}.stats-table th,.stats-table td{padding:12px 7px;font-size:13px}.stats-summary{gap:20px}}
@media(max-width:600px){.stats-table thead{display:none}.stats-table,.stats-table tbody{display:block}.stats-table tr{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:10px;margin:12px 0}.stats-table td{display:block;border:0;padding:6px;font-size:15px}.stats-table td:first-child{grid-column:1/-1;font-size:14px;border-bottom:1px solid var(--line);margin-bottom:6px;min-width:0}.stats-table td:not(:first-child):before{content:attr(data-label);display:block;white-space:nowrap;font-size:12px;color:var(--muted);margin-bottom:6px}}

.policy{max-width:740px;padding:24px;margin:auto;overflow-wrap:anywhere}.policy h1{font-size:clamp(24px,5vw,38px)}.policy h2{margin:32px 0 12px;font-size:21px}.policy p{font-size:16px;line-height:1.85}.brand img{border-radius:7px}footer nav{flex-wrap:wrap}

.policy-main{width:100%}.policy-main .policy{width:min(740px,calc(100% - 36px));padding:24px 0}.policy-language{display:flex;align-items:center;gap:8px;font-size:13px}.policy-language select{min-height:44px;max-width:145px;background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:6px}.policy-language span{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}

/* 2026-10-26 Logic Puzzles vivid-v2 brand; layout preserved. */
:root{--brand-surface:#FFFFFF;--brand-surfaceRaised:#FFFFFF;--brand-textPrimary:#183A36;--brand-textSecondary:#4A5D58;--brand-textMuted:#5B6B65;--brand-border:#E8DDCB;--brand-controlBorder:#7B897D;--brand-onPrimary:#173D3B;--brand-onAccent:#173D3B;--brand-disabledSurface:#FFFEFC;--brand-disabledText:#84908C;--brand-success:#24724F;--brand-successSurface:#E8F4EB;--brand-successBorder:#3D865F;--brand-danger:#A23E35;--brand-dangerSurface:#FBECE8;--brand-dangerBorder:#AD4B40;--brand-warning:#7C5315;--brand-warningSurface:#FFF2D6;--brand-warningBorder:#987330;--brand-info:#275D83;--brand-infoSurface:#E9F2FA;--brand-infoBorder:#497CA0;--brand-mint:#85D0C8;--brand-onMint:#173D3B;--brand-background:#FFFAF3;--brand-surfaceSubtle:#E4F7EE;--brand-primary:#FF9A3D;--brand-primarySoft:#FFE8BB;--brand-accent:#85D0C8;--brand-primaryHover:#FF922F;--brand-primaryPressed:#F9841F;--brand-onPrimarySoft:#A93708;--brand-onDanger:#FFFFFF;--brand-toastBackground:#183A36;--brand-toastText:#FAF5ED;--brand-selectedSurface:#FFE8BB;--brand-selectedBorder:#B53E0B;--brand-focus:#B53E0B;--brand-link:#B53E0B;--brand-hoverSurface:#FFF7EF;--brand-pressedSurface:#FFF1E4;--brand-inputSurface:#FFFFFF;--brand-inputText:#183A36;--brand-placeholder:#5B6B65;--brand-targetSurface:#FFE8BB;--brand-targetText:#A93708;--brand-tileSurface:#FFFFFF;--brand-tileText:#183A36;--brand-tileBorder:#7B897D;--brand-tileSelected:#FFE8BB;--brand-tileSelectedText:#A93708;--brand-tileUsedSurface:#FFFEFC;--brand-tileUsedText:#84908C;--brand-hintSurface:#E9F2FA;--brand-hintText:#275D83;--brand-diagramGiven:#183A36;--brand-diagramConstruction:#B53E0B;--brand-diagramAnswer:#24724F;--brand-diagramGrid:#D4DDD7;--brand-loadingTrack:#D4DDD7;--brand-loadingIndicator:#B53E0B;--brand-shadow:rgba(23,61,59,0.10);--brand-scrim:rgba(7,24,20,0.48);--bg:var(--brand-background);--paper:var(--brand-surface);--ink:var(--brand-textPrimary);--green:var(--brand-link);--line:var(--brand-border);--muted:var(--brand-textSecondary);color-scheme:light}@media(prefers-color-scheme:dark){:root{--brand-textPrimary:#E9F1EB;--brand-textSecondary:#B8C9C1;--brand-textMuted:#AEC2B7;--brand-border:#46564E;--brand-controlBorder:#9BB0A6;--brand-onPrimary:#173D3B;--brand-onAccent:#173D3B;--brand-disabledSurface:#283028;--brand-disabledText:#8D9E94;--brand-success:#91D5AE;--brand-successSurface:#173D2B;--brand-successBorder:#61A77D;--brand-danger:#FFB4A7;--brand-dangerSurface:#4B2524;--brand-dangerBorder:#CD8377;--brand-warning:#EBC78B;--brand-warningSurface:#423521;--brand-warningBorder:#B9985A;--brand-info:#A6D0EE;--brand-infoSurface:#203A4B;--brand-infoBorder:#6C9DBB;--brand-mint:#85D0C8;--brand-onMint:#173D3B;--brand-background:#20251F;--brand-surface:#2A332B;--brand-surfaceRaised:#344036;--brand-surfaceSubtle:#243F34;--brand-primary:#FFAC5A;--brand-primarySoft:#483324;--brand-accent:#85D0C8;--brand-primaryHover:#FFB86C;--brand-primaryPressed:#FFA14A;--brand-onPrimarySoft:#FFE3C5;--brand-onDanger:#172A23;--brand-toastBackground:#E9F1EB;--brand-toastText:#261E18;--brand-selectedSurface:#483324;--brand-selectedBorder:#FFBC78;--brand-focus:#FFBC78;--brand-link:#FFBC78;--brand-hoverSurface:#3B3D2F;--brand-pressedSurface:#484432;--brand-inputSurface:#2A332B;--brand-inputText:#E9F1EB;--brand-placeholder:#AEC2B7;--brand-targetSurface:#483324;--brand-targetText:#FFE3C5;--brand-tileSurface:#344036;--brand-tileText:#E9F1EB;--brand-tileBorder:#9BB0A6;--brand-tileSelected:#483324;--brand-tileSelectedText:#FFE3C5;--brand-tileUsedSurface:#283028;--brand-tileUsedText:#8D9E94;--brand-hintSurface:#203A4B;--brand-hintText:#A6D0EE;--brand-diagramGiven:#E9F1EB;--brand-diagramConstruction:#FFBC78;--brand-diagramAnswer:#91D5AE;--brand-diagramGrid:#46564E;--brand-loadingTrack:#46564E;--brand-loadingIndicator:#FFBC78;--brand-shadow:rgba(0,0,0,0.24);--brand-scrim:rgba(0,0,0,0.64);--bg:var(--brand-background);--paper:var(--brand-surface);--ink:var(--brand-textPrimary);--green:var(--brand-link);--line:var(--brand-border);--muted:var(--brand-textSecondary);color-scheme:dark}}
#demo button,.primary{background:var(--brand-primary);color:var(--brand-onPrimary)}#demo button:hover,.primary:hover{background:var(--brand-primaryHover)}#demo button:active,.primary:active{background:var(--brand-primaryPressed)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--brand-focus);outline-offset:3px}.brand img{border-radius:22%}.store[aria-disabled=true]{background:var(--brand-disabledSurface);color:var(--brand-disabledText);border:1px solid var(--brand-border)}#demo input{background:var(--brand-inputSurface);border-color:var(--brand-controlBorder)}

.product-landing.product-logic{--brand-surface:#FFFEFB;--brand-surfaceRaised:#FFFFFF;--brand-textPrimary:#183A36;--brand-textSecondary:#4A5D58;--brand-textMuted:#5B6B65;--brand-border:#D4DDD7;--brand-controlBorder:#788C84;--brand-onPrimary:#FFFFFF;--brand-onAccent:#173D3B;--brand-disabledSurface:#FDFCFB;--brand-disabledText:#84908B;--brand-success:#24724F;--brand-successSurface:#E8F4EB;--brand-successBorder:#3D865F;--brand-danger:#A23E35;--brand-dangerSurface:#FBECE8;--brand-dangerBorder:#AD4B40;--brand-warning:#7C5315;--brand-warningSurface:#FFF2D6;--brand-warningBorder:#987330;--brand-info:#275D83;--brand-infoSurface:#E9F2FA;--brand-infoBorder:#497CA0;--brand-mint:#85D0C8;--brand-onMint:#173D3B;--brand-background:#F4F4F9;--brand-surfaceSubtle:#EBECF4;--brand-primary:#59618C;--brand-primarySoft:#E8EAF7;--brand-accent:#E4B965;--brand-primaryHover:#535A82;--brand-primaryPressed:#4D5378;--brand-onPrimarySoft:#59618C;--brand-onDanger:#FFFFFF;--brand-toastBackground:#183A36;--brand-toastText:#F4F4F9;--brand-selectedSurface:#E8EAF7;--brand-selectedBorder:#59618C;--brand-focus:#59618C;--brand-link:#59618C;--brand-hoverSurface:#F2F1F2;--brand-pressedSurface:#E8E8EB;--brand-inputSurface:#FFFEFB;--brand-inputText:#183A36;--brand-placeholder:#5B6B65;--brand-targetSurface:#E8EAF7;--brand-targetText:#59618C;--brand-tileSurface:#FFFFFF;--brand-tileText:#183A36;--brand-tileBorder:#788C84;--brand-tileSelected:#E8EAF7;--brand-tileSelectedText:#59618C;--brand-tileUsedSurface:#FDFCFB;--brand-tileUsedText:#84908B;--brand-hintSurface:#E9F2FA;--brand-hintText:#275D83;--brand-diagramGiven:#183A36;--brand-diagramConstruction:#59618C;--brand-diagramAnswer:#24724F;--brand-diagramGrid:#D4DDD7;--brand-loadingTrack:#D4DDD7;--brand-loadingIndicator:#59618C;--brand-shadow:rgba(23,61,59,0.10);--brand-scrim:rgba(7,24,20,0.48);--bg:var(--brand-background);--paper:var(--brand-surface);--ink:var(--brand-textPrimary);--green:var(--brand-link);--line:var(--brand-border);--muted:var(--brand-textSecondary);color-scheme:light}@media(prefers-color-scheme:dark){.product-landing.product-logic{--brand-textPrimary:#E9F1EB;--brand-textSecondary:#B8C9C1;--brand-textMuted:#AEC2B7;--brand-border:#46564E;--brand-controlBorder:#9BB0A6;--brand-onPrimary:#172A23;--brand-onAccent:#173D3B;--brand-disabledSurface:#242C43;--brand-disabledText:#8C9D9B;--brand-success:#91D5AE;--brand-successSurface:#173D2B;--brand-successBorder:#61A77D;--brand-danger:#FFB4A7;--brand-dangerSurface:#4B2524;--brand-dangerBorder:#CD8377;--brand-warning:#EBC78B;--brand-warningSurface:#423521;--brand-warningBorder:#B9985A;--brand-info:#A6D0EE;--brand-infoSurface:#203A4B;--brand-infoBorder:#6C9DBB;--brand-mint:#85D0C8;--brand-onMint:#173D3B;--brand-background:#1B2134;--brand-surface:#272F47;--brand-surfaceRaised:#35405B;--brand-surfaceSubtle:#3C4663;--brand-primary:#B4BCE4;--brand-primarySoft:#3C4663;--brand-accent:#E4B965;--brand-primaryHover:#B9C1E6;--brand-primaryPressed:#BFC5E8;--brand-onPrimarySoft:#E9F1EB;--brand-onDanger:#172A23;--brand-toastBackground:#E9F1EB;--brand-toastText:#1B2134;--brand-selectedSurface:#3C4663;--brand-selectedBorder:#B4BCE4;--brand-focus:#B4BCE4;--brand-link:#B4BCE4;--brand-hoverSurface:#323A54;--brand-pressedSurface:#3B435D;--brand-inputSurface:#272F47;--brand-inputText:#E9F1EB;--brand-placeholder:#AEC2B7;--brand-targetSurface:#3C4663;--brand-targetText:#E9F1EB;--brand-tileSurface:#35405B;--brand-tileText:#E9F1EB;--brand-tileBorder:#9BB0A6;--brand-tileSelected:#3C4663;--brand-tileSelectedText:#E9F1EB;--brand-tileUsedSurface:#242C43;--brand-tileUsedText:#8C9D9B;--brand-hintSurface:#203A4B;--brand-hintText:#A6D0EE;--brand-diagramGiven:#E9F1EB;--brand-diagramConstruction:#B4BCE4;--brand-diagramAnswer:#91D5AE;--brand-diagramGrid:#46564E;--brand-loadingTrack:#46564E;--brand-loadingIndicator:#B4BCE4;--brand-shadow:rgba(0,0,0,0.24);--brand-scrim:rgba(0,0,0,0.64);--bg:var(--brand-background);--paper:var(--brand-surface);--ink:var(--brand-textPrimary);--green:var(--brand-link);--line:var(--brand-border);--muted:var(--brand-textSecondary);color-scheme:dark}}
/* Product-page pilot, scoped to the landing page; existing information pages stay intact. */
.product-landing{font-size:16px;line-height:1.65}
.product-landing .wrap{width:min(1120px,calc(100% - 48px))}
.product-landing .header-inner{min-height:76px;padding-block:12px;align-items:center;gap:16px}
.product-landing .brand{align-items:center;gap:10px}
.product-landing .brand img{width:42px;height:42px;border-radius:12px;flex-shrink:0}
.product-landing .brand-copy{display:block}
.product-landing .brand strong{font-size:17px;line-height:1.35}
.product-landing .brand small{display:none}
.product-landing .language{max-width:none}
.product-landing .language summary{min-height:44px;padding:9px 12px;border-radius:12px;font-size:13px;line-height:24px;white-space:nowrap}
.product-landing .language summary:focus:not(:focus-visible){outline:none}
.product-landing .hero{display:grid;grid-template-columns:1.06fr 1fr;gap:54px;align-items:center;padding-block:58px 52px}
.product-landing .hero-copy{grid-column:1;grid-row:1;min-width:0}
.product-landing .product-series{margin:0 0 12px;font-size:13px;font-weight:650;line-height:1.5;color:var(--color-link)}
.product-landing h1{font-size:clamp(36px,3.8vw,48px);line-height:1.16;letter-spacing:-.035em;margin:0 0 16px;overflow-wrap:normal}
.product-landing .product-intro{font-size:16px;line-height:1.7;max-width:39ch;margin:0}
.product-landing .product-facts{display:flex;gap:7px 15px;flex-wrap:wrap;list-style:none;padding:0;margin:20px 0 25px;font-size:12px;line-height:1.5;color:var(--color-text-secondary)}
.product-landing .product-facts li{display:flex;align-items:center;gap:7px}
.product-landing .product-facts li:before{content:"";width:4px;height:4px;flex-shrink:0;background:var(--color-link);border-radius:50%}
.product-landing .download{grid-column:auto;grid-row:auto;margin:0}
.product-landing .channels{display:grid;grid-template-columns:1fr 1fr;gap:10px;max-width:390px}
.product-landing .store-button{display:flex;align-items:center;justify-content:center;gap:11px;min-height:68px;width:100%;padding:11px 14px;border:1px solid var(--color-control-border);border-radius:14px;background:var(--color-surface);color:var(--color-text-primary);font:inherit;text-align:start;cursor:default;opacity:1;-webkit-text-fill-color:currentColor}
.product-landing .store-button>svg{width:23px;height:25px;flex-shrink:0}
.product-landing .store-button span{display:flex;flex-direction:column;gap:2px;min-width:0}
.product-landing .store-button strong{font-size:14px;line-height:1.35;white-space:nowrap;font-weight:650}
.product-landing .store-button small{font-size:11px;line-height:1.5;color:var(--color-text-secondary)}
.product-landing .download-status{font-size:11px;line-height:1.6;max-width:45ch;margin:10px 0 0;color:var(--color-text-secondary)}
.product-landing .how-link{display:inline-flex;align-items:center;gap:10px;min-height:44px;padding:8px 0;margin-top:8px;font-size:12px;line-height:1.5;text-decoration:none}
.product-landing .how-link:hover{text-decoration:underline}
.product-landing .hero-art{grid-column:2;grid-row:1;min-width:0;margin:0;min-height:300px;padding:30px 24px 26px;border-radius:26px;display:flex;flex-direction:column;justify-content:center;align-items:center;position:relative;overflow:hidden;background:radial-gradient(ellipse at 0 0,var(--color-primary-soft),transparent 70%),var(--color-surface-subtle)}
.product-landing .hero-art figcaption{font-size:11px;letter-spacing:.04em;line-height:1.5;margin:0 0 28px;color:var(--color-text-secondary);z-index:1}
.product-landing .puzzle-example{width:100%;z-index:1}
.product-landing .equation{gap:6px;flex-wrap:nowrap;font-size:21px;line-height:1.2;font-weight:500;white-space:nowrap}
.product-landing .equation b{display:grid;place-items:center;min-width:42px;height:52px;padding:6px;border-radius:12px;font-size:25px;font-weight:650;box-shadow:0 4px 0 var(--color-border)}
.product-landing .equation-result{display:flex;align-items:center;justify-content:center;gap:12px;margin-top:22px;font-size:23px;direction:ltr}
.product-landing .equation-result b{display:grid;place-items:center;width:60px;height:54px;border:1px solid var(--color-control-border);border-radius:14px;background:var(--color-surface);font-size:29px;font-weight:650;box-shadow:0 4px 0 var(--color-border)}
.product-landing .art-lines{position:absolute;right:-30px;bottom:-75px;width:180px;height:180px;border:1px solid var(--color-control-border);border-radius:50%;opacity:.13;pointer-events:none}
.product-landing .art-lines:before,.product-landing .art-lines:after{content:"";position:absolute;inset:18px;border:1px solid var(--color-control-border);border-radius:50%}.product-landing .art-lines:after{inset:36px}
.product-landing .play-overview{padding-block:30px 24px;border-top:1px solid var(--color-border)}
.product-landing .play-overview>h2{font-size:24px;margin:0 0 20px;letter-spacing:-.02em}
.product-landing .overview-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:20px}
.product-landing .overview-card{border:1px solid var(--color-border);padding:24px;border-radius:18px;background:var(--color-surface)}
.product-landing .overview-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px}
.product-landing .overview-heading h3{font-size:18px;line-height:1.4;margin:0;font-weight:650}
.product-landing .count,.product-landing .daily-mark{font-size:11px;white-space:nowrap;color:var(--color-text-secondary)}
.product-landing .overview-card>p{font-size:13px;line-height:1.7;margin:0 0 18px}
.product-landing .groups{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}
.product-landing .groups span{font-size:11px;line-height:1.5;padding:8px 10px;border-radius:8px;text-align:center}
.product-landing .daily-path{display:flex;align-items:center;gap:10px;height:76px;direction:ltr}
.product-landing .daily-path span{display:grid;place-items:center;width:44px;height:44px;border:1px solid var(--color-control-border);border-radius:12px;background:var(--color-surface-subtle);font-size:20px;font-weight:600}.product-landing .daily-path i{flex:1;max-width:55px;border-top:1px dashed var(--color-control-border)}
.product-landing .product-details{margin-bottom:10px;border-top:1px solid var(--color-border)}
.product-landing .info-disclosure{border-bottom:1px solid var(--color-border)}
.product-landing .info-disclosure summary{display:flex;align-items:center;justify-content:space-between;gap:20px;list-style:none;min-height:64px;font-size:14px;font-weight:600;cursor:pointer}
.product-landing .info-disclosure summary::-webkit-details-marker{display:none}
.product-landing .info-disclosure summary:after{content:"+";font-size:23px;font-weight:400}
.product-landing .info-disclosure[open] summary:after{content:"−"}
.product-landing .info-disclosure>div{max-width:720px;padding:0 0 22px;font-size:13px;line-height:1.9}
.product-landing .info-disclosure p{margin:0 0 10px}
.product-landing .footer{margin-top:38px;padding-block:30px}
.product-landing .footer h2{font-size:20px;margin-bottom:10px}
.product-landing .footer p,.product-landing .footer a{font-size:12px}
.product-landing .footer-grid{gap:32px}
@media(max-width:1000px){.product-landing .hero{gap:28px}.product-landing .hero-art{padding-inline:16px}.product-landing .equation{font-size:17px;gap:4px}.product-landing .equation b{min-width:35px;height:46px;font-size:22px}}
@media(max-width:760px){
  .product-landing .wrap{width:calc(100% - 36px)}
  .product-landing .header-inner{min-height:70px;gap:12px;padding-block:10px;align-items:center}
  .product-landing .brand img{width:38px;height:38px;border-radius:11px}
  .product-landing .brand strong{font-size:15px}
  .product-landing .language summary{font-size:12px;padding:9px 10px}
  .product-landing .hero{grid-template-columns:1fr;gap:26px;padding-block:28px 30px}
  .product-landing .hero-copy,.product-landing .hero-art{grid-column:1;grid-row:auto}
  .product-landing .product-series{font-size:12px;margin-bottom:10px}
  .product-landing h1{font-size:32px;line-height:1.18;margin-bottom:12px;letter-spacing:-.03em}
  .product-landing .product-intro{font-size:14px;line-height:1.65;max-width:39ch}
  .product-landing .product-facts{font-size:11px;gap:6px 12px;margin:16px 0 20px}
  .product-landing .channels{max-width:410px}
  .product-landing .store-button{min-height:64px;padding:10px 11px;gap:9px}
  .product-landing .store-button strong{font-size:13px}
  .product-landing .store-button>svg{width:20px;height:22px}
  .product-landing .download-status{font-size:10px;margin-top:9px}
  .product-landing .how-link{margin-top:3px;font-size:11px;min-height:40px}
  .product-landing .hero-art{min-height:180px;padding:18px 16px 20px;border-radius:20px}
  .product-landing .hero-art figcaption{font-size:10px;margin-bottom:16px}
  .product-landing .equation{gap:clamp(3px,1vw,6px);font-size:16px}
  .product-landing .equation>span{width:10px;flex:0 0 10px;text-align:center}
  .product-landing .equation b{width:clamp(30px,8.4vw,36px);min-width:0;flex-shrink:0;height:42px;padding:4px;font-size:clamp(18px,5vw,21px);border-radius:10px}
  .product-landing .equation-result{margin-top:14px;font-size:20px}
  .product-landing .equation-result b{width:48px;height:42px;font-size:24px;border-radius:10px}
  .product-landing .play-overview{padding-top:25px}
  .product-landing .play-overview>h2{font-size:22px;margin-bottom:17px}
  .product-landing .overview-grid{grid-template-columns:1fr;gap:14px}
  .product-landing .overview-card{padding:20px;border-radius:16px}
  .product-landing .overview-heading h3{font-size:16px}
  .product-landing .daily-path{height:58px;max-width:290px}
  .product-landing .info-disclosure summary{min-height:60px;font-size:13px}
  .product-landing .footer-grid{grid-template-columns:1fr 1fr;gap:20px}
  .product-landing .footer-brand{grid-column:1/-1}
  .product-landing .footer-brand p{max-width:44ch;margin-bottom:10px}
}
@media(max-width:359px){
  .product-landing .wrap{width:calc(100% - 32px)}
  .product-landing .brand{gap:8px}
  .product-landing .brand img{width:34px;height:34px;border-radius:9px}
  .product-landing .brand strong{font-size:13px}
  .product-landing .language summary{font-size:11px;padding-inline:8px}
  .product-landing .language summary:after{margin-inline-start:5px}
  .product-landing h1{font-size:29px}
  .product-landing .product-facts{gap:5px 9px;font-size:10px}
  .product-landing .store-button{padding-inline:9px;gap:7px}
  .product-landing .store-button strong{font-size:12px}
  .product-landing .store-button small{font-size:10px}
  .product-landing .equation{gap:4px;font-size:16px}
  .product-landing .equation b{width:30px;min-width:0;height:38px;font-size:18px}
  .product-landing .groups{grid-template-columns:repeat(2,1fr)}
}
@media(min-width:761px) and (max-height:500px){
  .product-landing .header-inner{min-height:60px;padding-block:8px}
  .product-landing .brand img{width:34px;height:34px}
  .product-landing .hero{padding-block:20px;gap:24px}
  .product-landing .product-series{margin-bottom:6px;font-size:11px}
  .product-landing h1{font-size:29px;margin-bottom:8px}
  .product-landing .product-intro{font-size:13px;line-height:1.5}
  .product-landing .product-facts{margin:10px 0 12px;font-size:10px;gap:5px 10px}
  .product-landing .store-button{min-height:58px;padding:8px 10px}
  .product-landing .download-status{font-size:10px;margin-top:6px}
  .product-landing .how-link{margin-top:0;min-height:32px}
  .product-landing .hero-art{min-height:240px}
}
@media(prefers-reduced-motion:reduce){.product-landing *{scroll-behavior:auto;transition:none}}

.product-landing.product-geometry{--color-background:var(--bg);--color-surface:var(--surface);--color-text-primary:var(--ink);--color-text-secondary:var(--muted);--color-link:var(--brand);--color-border:var(--border);--color-control-border:#788C84;--color-primary-soft:var(--soft);--color-surface-subtle:#E9F2F4}
.product-landing.product-logic{--color-background:var(--brand-background);--color-surface:var(--brand-surface);--color-text-primary:var(--brand-textPrimary);--color-text-secondary:var(--brand-textSecondary);--color-link:var(--brand-link);--color-border:var(--brand-border);--color-control-border:var(--brand-controlBorder);--color-primary-soft:var(--brand-primarySoft);--color-surface-subtle:var(--brand-surfaceSubtle)}
.product-landing header.header{width:100%;padding:0;border-bottom:1px solid var(--color-border);background:var(--color-background);position:sticky;top:0;z-index:20}
.product-landing .header-inner{display:flex;justify-content:space-between;margin:auto;padding-inline:0}
.product-landing main.wrap{margin:auto;padding:0}
.product-landing h1{font-family:inherit;font-weight:650}
.product-landing .hero{min-height:0}
.product-landing .language{position:relative;margin-inline-start:auto;flex-shrink:0}
.product-landing .language summary{display:flex;align-items:center;gap:10px;list-style:none;cursor:pointer;border:1px solid var(--color-control-border);background:var(--color-surface)}
.product-landing .language summary::-webkit-details-marker{display:none}
.product-landing .language nav{position:absolute;inset-inline-end:0;top:calc(100% + 8px);width:210px;max-width:calc(100vw - 28px);max-height:calc(100svh - var(--header-height) - 20px);overflow:auto;background:var(--color-surface);padding:8px;border:1px solid var(--color-border);border-radius:14px;box-shadow:0 12px 32px #183a3618}
.product-landing .language nav a{display:flex;justify-content:space-between;min-height:44px;padding:10px 12px;font-size:13px;border-radius:8px;text-decoration:none}
.product-landing .language nav a:hover,.product-landing .language nav a[aria-current]{background:var(--color-primary-soft)}
.product-landing :is(a,button,summary,input):focus-visible{outline:2px solid var(--color-link);outline-offset:3px;border-radius:8px}
.product-landing .store-button[aria-disabled]{pointer-events:none}
.product-landing :is(section,details)[id]{scroll-margin-top:calc(var(--header-height) + 20px)}
.product-landing.product-geometry .hero-art{min-height:340px;padding:22px 24px;gap:15px}
.product-landing.product-geometry .game-shot{position:static;transform:none;max-height:260px;width:auto;max-width:100%;border-radius:12px;box-shadow:0 8px 24px #183a3618;border:1px solid var(--color-border)}
.product-landing.product-geometry .hero-art figcaption{position:static;max-width:100%;margin:0;order:2;background:transparent;padding:0;text-align:center}
.product-landing.product-geometry .play-overview .feature-grid{gap:16px}
.product-landing.product-geometry .feature-grid article{padding:20px;border-radius:16px;min-height:0}
.product-landing.product-geometry .feature-grid h3{font-size:17px;margin:8px 0}
.product-landing.product-geometry .feature-grid p{font-size:13px;margin:0}
.product-landing.product-geometry .feature-grid .feature-number{font-size:28px}
.product-landing.product-geometry .steps{display:grid;grid-template-columns:1fr;gap:12px}
.product-landing.product-geometry .steps article{padding:14px}
.product-landing.product-geometry .faq-list details{padding:12px 0}
.product-landing.product-geometry .footer-grid{margin:auto;padding:0}
.product-landing.product-geometry .copyright{font-size:11px;padding-top:22px}
.product-landing.product-logic .hero-art{align-items:stretch;min-height:0;padding:26px 30px;border:1px solid var(--color-border);box-shadow:none;gap:0}
.product-landing.product-logic .preview-label{font-size:11px;letter-spacing:.04em;color:var(--color-link)}
.product-landing.product-logic .preview-question{font-size:13px;line-height:1.6;margin:8px 0}
.product-landing.product-logic .number-demo{font-family:inherit;font-size:29px;line-height:1.3;padding:10px 0 16px;gap:8px;grid-template-columns:1fr 30px 1fr}
.product-landing.product-logic .number-demo i{font-size:20px}
.product-landing.product-logic #demo input{min-height:44px;font-size:20px;border-color:var(--color-control-border);background:var(--color-surface)}
.product-landing.product-logic #demo button{min-height:44px;padding:9px 18px;font-size:13px}
.product-landing.product-logic #demo-feedback{min-height:32px;font-size:12px;line-height:1.6;margin:9px 0 0}
.product-landing.product-logic .preview-foot{font-size:10px;line-height:1.5}
.product-landing.product-logic .logic-features{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.product-landing.product-logic .logic-features article{border:1px solid var(--color-border);background:var(--color-surface);border-radius:16px;padding:22px}
.product-landing.product-logic .logic-features article>span{font-size:11px;color:var(--color-link)}
.product-landing.product-logic .logic-features h2{font-size:18px;line-height:1.4;margin:12px 0 10px}
.product-landing.product-logic .logic-features p{font-size:13px;margin:0}
.product-landing.product-logic .footer{width:100%;border-top:1px solid var(--color-border)}
.product-landing.product-logic .logic-footer{margin:auto;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.product-landing.product-logic .logic-footer nav{display:flex;gap:12px 20px;flex-wrap:wrap}
.product-landing.product-logic .logic-footer a{min-height:44px;display:inline-flex;align-items:center}
@media(max-width:760px){
 .product-landing.product-geometry .hero-art{min-height:0;padding:18px;gap:10px}
 .product-landing.product-geometry .game-shot{max-height:185px}
 .product-landing.product-geometry .play-overview .feature-grid{grid-template-columns:1fr 1fr;gap:12px}
 .product-landing.product-geometry .feature-grid article{padding:16px}
 .product-landing.product-geometry .feature-grid h3{font-size:15px}
 .product-landing.product-geometry .feature-grid p{font-size:12px}
 .product-landing.product-logic .hero-art{padding:20px 24px}
 .product-landing.product-logic .number-demo{font-size:26px;gap:6px;padding-block:8px 14px}
 .product-landing.product-logic .logic-features{grid-template-columns:1fr;gap:14px}
 .product-landing.product-logic .logic-features article{padding:20px}
 .product-landing.product-logic .logic-features h2{font-size:16px}
 .product-landing.product-logic .logic-footer{display:block}
 .product-landing.product-logic .logic-footer nav{gap:6px 20px;margin-top:10px}
}
@media(max-width:359px){.product-landing.product-geometry .play-overview .feature-grid{grid-template-columns:1fr}.product-landing.product-logic .brand strong{font-size:13px}}
@media(min-width:761px) and (max-height:500px){.product-landing.product-geometry .hero-art{min-height:260px}.product-landing.product-geometry .game-shot{max-height:190px}.product-landing.product-logic .hero-art{padding:18px 24px}.product-landing.product-logic .number-demo{font-size:24px;padding-block:6px 10px}}

.product-landing.product-geometry .play-overview>.eyebrow{display:none}
.product-landing.product-geometry .info-disclosure ol{padding-inline-start:20px}.product-landing.product-geometry .info-disclosure h3{font-size:16px}

.product-landing .hero{padding-inline:0}