/* Scoped category navigation; original page layout and chapter menus remain intact. */
body.has-category-nav{--nav-h:76px}
.has-category-nav .site-header .header-inner.wrap{width:min(1680px,calc(100% - 64px));display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:20px;align-items:center}
.has-category-nav .site-header .brand{width:auto;justify-self:start;border:0;padding:0}
.has-category-nav .site-header .header-contact{width:auto;justify-self:end;margin:0;gap:12px}
.has-category-nav .site-header .category-nav{display:flex;justify-self:center;gap:8px;margin:0;padding:0;border:0;border-radius:0;background:transparent;max-width:100%;min-width:0}
.has-category-nav .site-header .category-nav a{flex:none;min-height:44px;padding:0 18px;border:0;border-radius:11px;color:var(--ink);font-size:15px;font-weight:600;white-space:nowrap;box-shadow:none}
.has-category-nav .site-header .category-nav a[aria-current=page]{background:var(--yellow)}
.has-category-nav .category-nav a:focus-visible{outline:3px solid var(--action);outline-offset:2px}
.has-category-nav .category-nav a:active{background:var(--yellow-soft);transform:translateY(1px)}
@media(hover:hover){.has-category-nav .site-header .category-nav a:hover{background:var(--soft);color:var(--action);text-decoration:none}.has-category-nav .site-header .category-nav a[aria-current=page]:hover{background:var(--yellow-hover);color:var(--ink)}}
@media(min-width:1101px) and (max-width:1450px){.has-category-nav .site-header .header-inner.wrap{width:calc(100% - 40px);gap:12px;grid-template-columns:auto minmax(0,1fr) auto}.has-category-nav .site-header .category-nav{gap:2px}.has-category-nav .site-header .category-nav a{padding-inline:12px;font-size:14px}.has-category-nav .header-contact .contact-title{display:none}}
@media(max-width:1100px){body.has-category-nav{--nav-h:124px}.has-category-nav .site-header .header-inner.wrap{width:calc(100% - 32px);grid-template-columns:minmax(0,1fr) auto;gap:8px 16px;align-content:center}.has-category-nav .site-header .header-contact{grid-column:2;grid-row:1}.has-category-nav .site-header .category-nav{grid-column:1/-1;grid-row:2;overflow-x:auto;scrollbar-width:none}.category-nav::-webkit-scrollbar{display:none}}
@media(max-width:700px){body.has-category-nav{--nav-h:168px}.has-category-nav .site-header .header-inner.wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:6px}.has-category-nav .site-header .brand{grid-row:1;grid-column:1;font-size:15px;min-height:36px}.has-category-nav .site-header .header-contact{grid-row:3;grid-column:1;justify-self:stretch;justify-content:space-between}.has-category-nav .site-header .category-nav{grid-row:2;grid-column:1;justify-self:start;width:100%;gap:2px;padding:2px}.has-category-nav .site-header .category-nav a{min-height:44px;padding:0 10px;font-size:13px}.has-category-nav .site-header .brand-avatar{width:32px;height:32px}}
.case-library{padding:42px 0 70px}.case-library-head{margin-bottom:32px}.case-library-head h1{font-size:38px}.case-library-head p{color:var(--muted);font-size:17px}
.case-library-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.case-library-card{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:var(--surface);color:var(--ink);display:flex;flex-direction:column;transition:border-color .2s,box-shadow .2s}
.case-library-card:hover{border-color:var(--action);box-shadow:var(--shadow);text-decoration:none}
.case-library-card img{display:block;width:100%;height:280px;object-fit:cover;object-position:center 35%;background:var(--soft)}
.case-library-card[data-format=landscape] img{object-fit:contain}
/* finesse · component: case-library-button · tokens: inherited
 * Link states: default, hover, focus-visible, active; navigation handled by the card anchor. */
.case-library-info{padding:20px;text-align:center}.case-library-info h2{font-size:22px;margin:0 0 4px}.case-library-info p{color:var(--muted);font-size:14px;margin:0 0 18px}
.case-library-button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;min-width:148px;padding:9px 22px;border:1px solid var(--cover-line);border-radius:10px;background:var(--yellow);color:var(--ink);font:600 15px/1.5 var(--font);white-space:nowrap;box-shadow:0 2px 0 var(--cover-line);transition:background-color .16s,transform .16s,box-shadow .16s}
.case-library-button svg{flex-shrink:0}
.case-library-card:focus-visible .case-library-button{outline:3px solid var(--action);outline-offset:4px}
.case-library-card:active .case-library-button{background:var(--yellow-hover);transform:translateY(2px);box-shadow:none}
@media(hover:hover){.case-library-card:hover .case-library-button{background:var(--yellow-hover)}}
@media(prefers-reduced-motion:reduce){.case-library-button{transition:none}}

@media(max-width:1100px){.case-library-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:700px){.case-library-head h1{font-size:30px}.case-library-grid{gap:14px}.case-library-card img{height:210px}.case-library-info{padding:14px}.case-library-info h2{font-size:19px}}
@media(max-width:420px){.case-library-grid{grid-template-columns:1fr}.case-library-card img{height:300px}}

/* finesse · typography refinement · existing yellow/violet learning site
   Natural Chinese spacing, a consistent reading scale, and scoped alignment. */
.has-category-nav main :is(h1,h2,h3){letter-spacing:0;word-break:normal;overflow-wrap:break-word}
.has-category-nav main p{text-wrap:pretty;overflow-wrap:break-word}
.has-category-nav :is(.course-directory-head,.category-heading,.case-library-head) h1{font-size:38px;line-height:1.35;margin:0 0 16px}
.has-category-nav :is(.course-directory-head,.category-heading,.case-library-head)>p{font-size:17px;line-height:1.85;margin:0;max-width:44em}
.has-category-nav .course-directory-head{padding:32px 0}
.home-deck-page .welcome h1{font-size:clamp(30px,2.75vw,42px);line-height:1.4;letter-spacing:0;text-wrap:initial;margin:14px 0 24px}
.home-deck-page .welcome h1 span{font-size:inherit;line-height:inherit}
.home-deck-page .hero-copy-enriched>p{margin:0 0 14px;line-height:1.85;max-width:25em}
.home-deck-page .hero-learning>p{font-size:16px;line-height:1.9;margin:0 0 24px;max-width:26em}
.home-deck-page .recommend-cover{gap:24px;padding:36px 40px}
.home-deck-page .recommend-cover h3{font-size:30px;line-height:1.45;text-wrap:initial}
.home-deck-page .recommend-cover h3 span{font-size:20px;line-height:1.65;font-weight:500;margin-top:10px}
.home-deck-page .recommend-cover p{max-width:24em;line-height:1.85;padding-top:20px}
.home-deck-page .recommend-copy{padding:36px 40px}
.home-deck-page .recommend-copy h3{font-size:24px;line-height:1.5;text-wrap:initial}
.home-deck-page .recommend-copy>p{font-size:16px;line-height:1.85;margin:12px 0 22px;max-width:36em}
.home-deck-page .recommend-copy li{align-items:baseline;line-height:1.75;padding:11px 0;gap:14px}
.home-deck-page .recommend-copy li>span:first-child{flex:0 0 22px;font-variant-numeric:tabular-nums}
.home-deck-page .recommend-copy li>span:last-child{min-width:0}
.home-deck-page .recommend-choices .topic-tile h3{font-size:20px;line-height:1.5;min-height:60px}
.home-deck-page .recommend-choices .recommend-select{text-align:left;min-width:0}
.home-deck-page .recommend-choices .topic-tile p{font-size:15px;line-height:1.85;margin:14px 0 24px}
.has-category-nav .lesson-card{gap:12px;padding:30px}
.has-category-nav .lesson-card h2,.has-category-nav .category-tile h2{font-size:22px;line-height:1.5;text-wrap:initial}
.has-category-nav .lesson-number{font-size:30px;margin-bottom:6px;font-variant-numeric:tabular-nums}
.has-category-nav .lesson-card p{font-size:16px;line-height:1.85;margin:4px 0 20px;max-width:32em}
.has-category-nav .category-tile p{font-size:16px;line-height:1.85;margin:12px 0 24px}
.has-category-nav .route-note p{font-size:15px;line-height:1.8}
.has-category-nav .workflow-hero h1,.has-category-nav .study-hero h1{font-size:clamp(32px,3.2vw,44px);line-height:1.4}
.has-category-nav .workflow-hero p{line-height:1.85;max-width:34em}
.has-category-nav .workflow-hero .workflow-lead{font-size:20px;line-height:1.7;margin:22px 0 12px}
.has-category-nav .study-section-title{align-items:flex-start;margin-bottom:20px}
.has-category-nav .study-section h2{font-size:25px;line-height:1.45;text-wrap:initial}
.has-category-nav .study-section>p{font-size:17px;line-height:1.95;max-width:46em;margin:16px 0;color:var(--text)}
.has-category-nav .study-two p,.has-category-nav .study-checks p,.has-category-nav .story-beat p{font-size:16px;line-height:1.9}
.has-category-nav .study-nav a{display:block;font-size:15px;line-height:1.75;padding:10px 12px 10px 3.1em;text-indent:-2.3em}
.has-category-nav .study-nav>span{font-size:13px;letter-spacing:.03em}
.has-category-nav .remake-figure figcaption{font-size:14px;line-height:1.8}
.has-category-nav .study-note,.has-category-nav .workflow-course .study-section .remake-note{font-size:15px;line-height:1.85}
.has-category-nav .card>p,.has-category-nav .guide-content>p{font-size:17px;line-height:1.95;max-width:46em}
.has-category-nav .nav a,.has-category-nav .guide-nav nav a{font-size:16px;line-height:1.7}
@media(max-width:1100px){
 .home-deck-page .recommend-cover,.home-deck-page .recommend-copy{padding:28px}
 .home-deck-page .recommend-cover h3{font-size:26px}
 .home-deck-page .recommend-copy h3{font-size:23px}
}
@media(max-width:768px){
 .has-category-nav :is(.course-directory-head,.category-heading,.case-library-head) h1{font-size:30px}
 .has-category-nav :is(.course-directory-head,.category-heading,.case-library-head)>p{font-size:16px}
 .home-deck-page .welcome h1{font-size:clamp(28px,7.4vw,40px);line-height:1.45;margin:8px 0 20px}
 .home-deck-page .recommend-cover,.home-deck-page .recommend-copy{padding:24px}
 .home-deck-page .recommend-cover{gap:18px}
 .home-deck-page .recommend-cover h3{font-size:25px}
 .home-deck-page .recommend-cover h3 span{font-size:19px;margin-top:8px}
 .home-deck-page .recommend-copy h3{font-size:22px}
 .home-deck-page .recommend-copy li{font-size:15px}
 .home-deck-page .recommend-choices .topic-tile h3{min-height:48px}
 .has-category-nav .lesson-card{padding:24px}
 .has-category-nav .lesson-card h2,.has-category-nav .category-tile h2{font-size:21px}
 .has-category-nav .study-section h2{font-size:22px;line-height:1.5}
 .has-category-nav .study-section>p,.has-category-nav .card>p,.has-category-nav .guide-content>p{font-size:16px;line-height:1.9}
 .has-category-nav .study-nav a{font-size:14px;line-height:1.75}
}

.home-deck-page .hero-learning>p>span{display:block}
.has-category-nav .study-nav a{text-wrap:balance}

/* Editorial introductions: page-specific content structure, shared reading rhythm. */
.has-category-nav :is(.workflow-hero,.study-hero,.codex-lesson-hero)>.editorial-intro{min-width:0;max-width:560px}
.has-category-nav .editorial-intro h1{margin:0 0 24px;line-height:1.3;letter-spacing:0;text-wrap:balance}
.has-category-nav .editorial-intro :is(.workflow-lead,.study-intro){font-size:20px;line-height:1.7;font-weight:700;margin:0 0 16px;max-width:25em;text-wrap:pretty}
.has-category-nav .editorial-intro>p:not(.workflow-lead):not(.study-intro){font-size:17px;line-height:1.9;margin:0 0 12px;max-width:29em;color:var(--muted);text-wrap:pretty}
.has-category-nav .editorial-intro .prompt-actions{margin-top:28px;gap:14px 24px}
.has-category-nav .editorial-intro>.btn{margin-top:24px}
.has-category-nav .editorial-intro .study-tags{margin:24px 0 0;gap:8px}
.has-category-nav .remake-course .workflow-hero>.editorial-intro{align-self:start;padding-top:64px;max-width:520px}
.has-category-nav .remake-course .editorial-intro h1{font-size:40px;white-space:normal}
.has-category-nav .editorial-intro .intro-route{list-style:none;padding:0;margin:24px 0 0;max-width:480px}
.has-category-nav .intro-route li{display:grid;grid-template-columns:28px minmax(0,1fr);gap:12px;padding:15px 0;border-top:1px solid var(--line)}
.has-category-nav .intro-route li>span{font-size:13px;font-weight:700;line-height:27px;color:var(--action);font-variant-numeric:tabular-nums}
.has-category-nav .intro-route strong{font-size:17px;line-height:1.6;color:var(--ink)}
.has-category-nav .intro-route p{font-size:15px;line-height:1.8;margin:4px 0 0;color:var(--muted)}
.has-category-nav .remake-course .editorial-intro .prompt-actions{margin-top:24px}
/* The GPT / TikTok chapter headers sit outside main and need the same type rules. */
.has-category-nav .hero-in h1{font-size:clamp(32px,3.1vw,44px);line-height:1.4;letter-spacing:0;max-width:18em;text-wrap:balance;overflow-wrap:break-word;margin:0 0 18px}
.has-category-nav .hero-in>div:last-child>p{font-size:18px;line-height:1.85;max-width:34em;margin:0;color:var(--muted);text-wrap:pretty}
.has-category-nav .hero-in .pills{margin-top:22px}
.has-category-nav .codex-lesson-hero .editorial-intro>p:first-of-type{font-size:20px;line-height:1.7;font-weight:600;color:var(--ink);margin-bottom:16px}
@media(max-width:1000px){
 .has-category-nav .remake-course .workflow-hero>.editorial-intro{padding-top:0;max-width:620px}
 .has-category-nav .remake-course .editorial-intro .intro-route{max-width:100%}
}
@media(max-width:768px){
 .has-category-nav :is(.workflow-hero,.study-hero,.codex-lesson-hero)>.editorial-intro{max-width:100%}
 .has-category-nav .editorial-intro h1,.has-category-nav .remake-course .editorial-intro h1{font-size:32px;line-height:1.4;margin-bottom:20px}
 .has-category-nav .editorial-intro :is(.workflow-lead,.study-intro){font-size:19px;line-height:1.7;margin-bottom:14px}
 .has-category-nav .editorial-intro>p:not(.workflow-lead):not(.study-intro){font-size:16px;line-height:1.9;max-width:100%}
 .has-category-nav .editorial-intro .intro-route{margin-top:22px}
 .has-category-nav .intro-route li{gap:8px;padding:13px 0}
 .has-category-nav .intro-route strong{font-size:16px}
 .has-category-nav .intro-route p{font-size:14px}
 .has-category-nav .hero-in h1{font-size:30px;line-height:1.45;margin-bottom:16px}
 .has-category-nav .hero-in>div:last-child>p{font-size:16px;line-height:1.85}
 .has-category-nav .codex-lesson-hero .editorial-intro>p:first-of-type{font-size:19px}
}


/* finesse · mobile reading refinement · preserves desktop and existing media */
.mobile-toc-toggle,.mobile-image-zoom{display:none}
@media(max-width:768px){
 html:has(body.has-category-nav){scroll-padding-top:108px}
 body.has-category-nav{--nav-h:108px}
 .has-category-nav .site-header .header-inner.wrap{width:calc(100% - 32px);grid-template-columns:minmax(0,1fr) auto;grid-template-rows:48px 44px;align-content:center;gap:4px 8px}
 .has-category-nav .site-header .brand{grid-row:1;grid-column:1;font-size:14px;gap:8px;min-height:44px}
 .has-category-nav .site-header .brand-avatar{width:32px;height:32px}
 .has-category-nav .site-header .header-contact{grid-row:1;grid-column:2;justify-self:end;gap:0}
 .has-category-nav .header-contact .contact-title{display:none}
 .has-category-nav .header-contact .contact-actions{gap:4px}
 .has-category-nav .header-contact .contact-action{height:44px;width:44px;padding:10px}
 .has-category-nav .header-contact .contact-action svg{width:18px;height:18px}
 .has-category-nav .header-contact .contact-action span{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
 .has-category-nav .site-header .category-nav{grid-row:2;grid-column:1/-1;display:flex;width:100%;gap:2px;padding:0;justify-self:stretch;overflow-x:auto}
 .has-category-nav .site-header .category-nav a{flex:1 0 auto;justify-content:center;min-height:44px;padding:0 7px;font-size:12px;white-space:nowrap}
 .has-category-nav .header-contact .contact-feedback{z-index:2;top:calc(100% + 4px)}
 .has-category-nav :is(.wrap,.home-main){width:calc(100% - 32px)}
 .has-category-nav main :is(section[id],aside[id],article[id]){scroll-margin-top:16px}
 .home-deck-page .home-main{padding-top:24px}
 .home-deck-page .welcome{gap:12px;padding-bottom:24px}
 .home-deck-page .hero-copy-enriched>p{font-size:16px;line-height:1.8}
 .home-deck-page .hero-learning>p{font-size:15px;line-height:1.8;margin-bottom:18px}
 .home-deck-page .welcome h1{font-size:clamp(27px,7.5vw,36px);line-height:1.4;margin:0 0 18px}
 .home-deck-page .learning-sequence{padding:14px 0;margin-bottom:18px}
 .home-deck-page .welcome-actions{margin-top:18px;gap:12px;justify-content:flex-start}
 .home-deck-page .welcome-actions .btn{font-size:15px;padding:10px 16px}
 .home-deck-page .deck-navigation{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));gap:0;width:100%;padding:0}
 .home-deck-page .deck-navigation button{width:100%;min-width:0;height:44px}
 .home-deck-page .deck-stage{overflow:clip}
 .home-deck-page .case-deck[data-state=focused] .deck-stage{overflow:visible}
 .has-category-nav .case-library-grid{grid-template-columns:minmax(0,1fr);gap:20px}



 .has-category-nav .case-library{padding-top:28px}
 .has-category-nav .case-library-head{margin-bottom:24px}
 .has-category-nav aside.mobile-toc{position:static;max-height:none;overflow:visible;min-width:0;padding:0;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
 .has-category-nav .mobile-toc>.mobile-toc-toggle{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;min-height:52px;border:0;background:transparent;border-radius:12px;padding:12px 16px;color:var(--ink);font:600 15px/1.6 var(--font);cursor:pointer}
 .mobile-toc-toggle::after{content:'＋';font-size:20px;color:var(--action)}
 .mobile-toc-toggle[aria-expanded=true]::after{content:'−'}
 .has-category-nav .mobile-toc:not(.mobile-toc-open)>:not(.mobile-toc-toggle){display:none}
 .has-category-nav .mobile-toc.mobile-toc-open>nav{display:grid;grid-template-columns:minmax(0,1fr);padding:0 10px 10px;gap:3px}
 .has-category-nav .mobile-toc>span,.has-category-nav .mobile-toc>small{display:none}
 .has-category-nav .mobile-toc nav a{white-space:normal;min-height:44px;font-size:15px;line-height:1.65;text-wrap:initial}
 .has-category-nav .mobile-toc .nav-progress{display:none}
 .has-category-nav .remake-course .editorial-intro .intro-route{margin-top:20px}
 .has-category-nav .remake-course .intro-route li{padding:10px 0}
 .has-category-nav .remake-course .workflow-hero{gap:24px}
 .has-category-nav .remake-hero-comparison .remake-comparison{gap:26px}
 .has-category-nav :is(.study-article,.guide-content,.content){min-width:0}
 .has-category-nav .table-wrap{max-width:100%;overscroll-behavior-x:contain}
 .has-category-nav .table-wrap table{min-width:560px;font-size:14px}
 .has-category-nav :is(.prompt-block,.prompt-details) pre{overflow-wrap:anywhere;white-space:pre-wrap;font-size:15px;line-height:1.85}
 .has-category-nav :is(.prompt-actions,.guide-pagination){gap:12px}
 .has-category-nav :is(.prompt-actions a,.prompt-actions button,.remake-figure figcaption a){min-height:44px}
 .has-category-nav .image-dialog{width:calc(100vw - 16px);max-width:calc(100vw - 16px);max-height:calc(100dvh - 24px);padding:12px;overscroll-behavior:contain}
 .has-category-nav .image-dialog-toolbar{position:sticky;top:-12px;left:0;background:var(--surface);z-index:2;display:flex;flex-wrap:wrap;gap:8px;padding:8px 0}
 .has-category-nav .image-dialog-toolbar>span{flex:1 0 100%;font-size:14px}
 .has-category-nav .image-dialog-toolbar button{min-height:44px;font-size:14px;color:var(--action)}
 .has-category-nav .mobile-image-zoom{display:inline-flex;align-items:center;padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:var(--surface)}
 .has-category-nav .image-dialog.is-mobile-zoomed .full-image{max-width:none;width:var(--mobile-image-width);height:auto}
 .has-category-nav .wechat-dialog{max-height:calc(100dvh - 32px);padding-bottom:max(16px,env(safe-area-inset-bottom))}
 .has-category-nav .top{bottom:max(12px,env(safe-area-inset-bottom));right:12px}
}
@media(max-width:360px){
 .has-category-nav .site-header .category-nav a{padding-inline:4px;font-size:12px}
 .home-deck-page .welcome-actions .text-link{font-size:13px}
}

/* Phone touch targets: keep course switching comfortable without changing desktop. */
@media(max-width:768px){
 .home-deck-page .recommend-choices .recommend-select{min-height:44px}
 .home-deck-page .welcome-actions .text-link{display:inline-flex;align-items:center;min-height:44px}
}