/* Approved wangbudong-ai-prototype.html v0.1 styles. */
:root{--bg:#fcfbfa;--paper:#fff;--ink:#23262e;--muted:#77777d;--navy:#304570;--navy-hover:#24375b;--line:#e9e6e2;--blue:#edf0f6;--sand:#f4efe7;--green:#eff3ee;--lilac:#f3f0f6;--radius:12px;--serif:'Noto Serif CJK SC','Songti SC','STSong','SimSun',serif;--sans:'Noto Sans CJK SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;--shadow:0 3px 9px rgba(35,38,46,.035);--width:1200px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.75 var(--sans);-webkit-font-smoothing:antialiased}body.modal-open{overflow:hidden}button,input,select,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{color:inherit;cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}button{border:0;background:none}a{color:inherit;text-decoration:none}a,button,input,select,textarea{outline-offset:4px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--navy)}img{display:block;max-width:100%}h1,h2,h3,p{margin:0}h1,h2,h3,.serif{font-family:var(--serif);font-weight:700}h1{font-size:43px;line-height:1.5;letter-spacing:.02em}h2{font-size:23px;line-height:1.5}h3{font-size:18px;line-height:1.5}small{font-size:12px}.icon{width:16px;height:16px;fill:currentColor;flex:none;display:inline-block;vertical-align:-2px}.muted{color:var(--muted)}.container{width:min(var(--width),calc(100% - 80px));margin-inline:auto}.skip-link{position:fixed;z-index:100;left:20px;top:-80px;padding:10px 20px;background:var(--navy);color:white;border-radius:8px}.skip-link:focus{top:8px}.site-header{height:72px;background:rgba(252,251,250,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}.header-inner{display:flex;align-items:center;height:100%;gap:35px}.brand{display:flex;align-items:center;gap:10px;white-space:nowrap}.brand img{width:43px;height:25px;object-fit:contain;mix-blend-mode:multiply}.brand strong{font:700 22px/1.3 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#a7afbf;border-radius:7px;color:var(--navy);font-size:13px;line-height:1.65;font-weight:500;white-space:nowrap;transition:background .18s,transform .18s,border-color .18s}.btn:hover{background:var(--blue);border-color:var(--navy);transform:translateY(-1px)}.btn-primary{background:var(--navy);border-color:var(--navy);color:#fff}.btn-primary:hover{background:var(--navy-hover);color:#fff}.btn-soft{border:1px solid var(--line);background:var(--paper);color:var(--ink)}.btn-small{padding:6px 12px;font-size:12px}.text-link{display:inline-flex;align-items:center;gap:9px;color:#555962;font-size:12px;white-space:nowrap}.text-link:hover{color:var(--navy)}.text-link .icon{width:12px;height:12px}.eyebrow{display:flex;align-items:center;gap:13px;color:#606575;letter-spacing:.17em;font-size:11px;font-weight:600}.eyebrow:after{content:'';width:56px;height:1px;background:#a7abb6}.hero{position:relative;display:grid;grid-template-columns:1fr 1.13fr;align-items:center;min-height:330px;padding:39px 0 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@media(min-width:1600px){:root{--width:1280px}.hero{min-height:365px}.hero h1{font-size:39px}.hero p{font-size:14px}.page-hero{min-height:300px}.page-hero h1{font-size:46px}.card-cover{height:125px}.resource-card .card-cover{height:100px}.lab-project-row{grid-template-columns:190px 1fr}.featured-project .card-cover{height:207px}}
@media(max-width:1100px){.container{width:calc(100% - 48px)}.header-inner{gap:20px}.desktop-nav{gap:20px}.header-actions{gap:7px;margin-left:10px}.brand strong{font-size:20px}.brand img{width:34px}.hero h1{font-size:30px}.hero p{font-size:12px}.hero{min-height:300px}.hero-actions{gap:10px}.btn{padding:9px 15px}.quick-card{padding:16px}.quick-title{font-size:16px;gap:9px}.quick-title>.icon:first-child{width:18px;height:18px}.quick-card p{font-size:11px}.type-tab{padding:13px 10px;gap:8px}.type-tab>.icon{width:18px;height:18px}.type-tab strong{font-size:14px}.type-tab small{font-size:9px}.resource-layout{grid-template-columns:180px 1fr;gap:17px}.resource-grid{gap:13px}.resource-card .card-body{padding:11px}.resource-card .card-title{font-size:14px}.resource-hero .search-wrap{width:560px}.scenario-bar{gap:9px}.scenario-pill{padding:4px 10px;font-size:10px}.scenario-bar>strong{font-size:15px}.lab-project-row{grid-template-columns:135px 1fr;gap:13px}.lab-row-title{font-size:15px}.lab-row-title .status{font-size:9px;padding:2px 7px}.featured-project .card-cover{height:175px}.lab-feature{gap:19px;grid-template-columns:.85fr 1.2fr}.lab-bottom{gap:20px}.lab-map{padding:17px}.lab-map h2{font-size:20px}.map-node{min-width:95px;font-size:11px;padding:6px 10px;gap:6px}.map-node .icon{width:13px;height:13px}.map-node small{font-size:9px}.map-node.central{padding:11px 14px}.task-callout{padding:22px;gap:20px}.task-callout h3{font-size:18px}.task-callout p{font-size:10px}}
@media(max-width:900px){.desktop-nav{gap:14px}.nav-link{font-size:11px}.header-actions{margin-left:0}.brand strong{font-size:18px}.header-inner{gap:16px}.hero{grid-template-columns:1fr 1fr}.hero h1{font-size:28px}.hero p{font-size:11px}.hero-art{width:110%}.hero-actions .btn{font-size:11px;padding:9px 13px}.card-title{font-size:15px}.card-desc{font-size:11px}.projects-grid{gap:12px}.card-body{padding:12px}.type-tabs{gap:8px}.type-tab{padding:12px 10px;gap:8px}.type-tab>.icon{width:16px}.type-tab small{display:none}.type-tab strong{font-size:13px}.resource-grid{grid-template-columns:repeat(2,1fr)}.resource-hero .search-wrap{width:500px}.page-hero h1{font-size:35px}.filter-panel{padding:16px 10px}.resource-layout{grid-template-columns:170px 1fr}.resource-card .card-title{font-size:16px}.resource-card .card-cover{height:100px}.scenario-bar{row-gap:10px}.task-callout{display:block}.task-callout .search-wrap{margin-top:14px}.lab-feature{grid-template-columns:.9fr 1.1fr;gap:15px}.lab-project-row{grid-template-columns:95px 1fr;gap:11px}.lab-row-title .status{display:none}.lab-row-title{font-size:15px}.lab-row-desc{font-size:10px}.featured-project .card-title{font-size:20px}.featured-project .card-body{padding:16px}.lab-bottom{grid-template-columns:1fr}.lab-map .map-graph{max-width:560px;margin-inline:auto}.lab-map{padding:22px}.experiment-card img{height:115px}.experiment-card strong{font-size:16px;min-height:60px}.experiment-card p{min-height:0}.two-column{gap:26px}.map-banner{grid-template-columns:.9fr 1.2fr;padding:23px}.map-copy h2{font-size:23px}.map-copy p{font-size:11px}.map-node{min-width:85px;padding:5px 9px}.map-node.central{padding:10px 11px}.map-node small{font-size:8px}.footer-inner{align-items:flex-start}.footer-links{gap:9px}}
@media(max-width:700px){.container{width:calc(100% - 36px)}.site-header{height:62px}.header-inner{gap:10px}.brand img{width:32px;height:23px}.brand strong{font-size:19px}.desktop-nav,.login-button{display:none}.header-actions{margin-left:auto;gap:5px}.mobile-toggle{display:inline-flex}.header-actions .icon-button{width:32px;height:32px}.mobile-nav-panel.open{display:flex;position:absolute;left:0;right:0;top:61px;background:var(--bg);border-bottom:1px solid var(--line);padding:14px 20px;box-shadow:0 12px 20px #1e293a08;flex-direction:column;gap:3px}.mobile-nav-panel .nav-link{font-size:14px;padding:11px 8px;border-radius:5px}.mobile-nav-panel .nav-link.active{background:var(--blue)}.mobile-nav-panel .nav-link.active:after{display:none}.hero{display:flex;flex-direction:column;min-height:0;padding:31px 0 22px;gap:12px;align-items:stretch}.hero .eyebrow{font-size:9px;margin-bottom:12px}.hero h1{font-size:30px;margin-bottom:14px;line-height:1.5}.hero 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img{height:86px;min-height:86px}.lab-row-title{font-size:15px;gap:7px;margin-bottom:6px}.lab-row-title .status{display:none}.lab-row-desc{font-size:10px}.lab-row-meta{font-size:9px;margin-top:7px}.extra-project{font-size:10px;margin-top:12px}.lab-bottom{grid-template-columns:1fr;margin-top:25px;gap:25px}.experiment-grid{grid-template-columns:1fr;gap:10px}.experiment-card{display:grid;grid-template-columns:96px 1fr;gap:0 13px;padding:10px}.experiment-card img{grid-row:1/4;height:92px;width:96px;align-self:center}.experiment-card strong{padding:0;font-size:14px;min-height:0;line-height:1.7}.experiment-card p{font-size:10px;padding:5px 0 0;min-height:0}.experiment-card small{padding:6px 0 0;font-size:9px}.lab-map{padding:20px 16px 13px}.lab-map .map-graph{height:200px;margin-top:15px}.lab-map .section-title h2{font-size:21px}.lab-filter-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.lab-filter-grid .card-cover{height:100px}.prototype-info{font-size:9px;line-height:1.8;align-items:flex-start}.prototype-info .icon{margin-top:3px;flex:none}dialog{max-width:calc(100% - 22px);border-radius:13px;max-height:92svh}.dialog-header{padding:16px 18px 13px}.dialog-header h2{font-size:18px;line-height:1.65}.dialog-body{padding:20px 18px 24px}.dialog-label{font-size:10px;flex-wrap:wrap}.dialog-cover{height:132px;margin-bottom:18px}.dialog-lead{font-size:12px}.dialog-section{margin-top:20px}.dialog-section h3{font-size:16px}.dialog-section p{font-size:12px}.dialog-actions{gap:9px;margin-top:20px;padding-top:17px}.dialog-actions .btn{font-size:11px;padding:9px 12px}.boundary-note{font-size:10px;padding:12px}.prompt-code{font-size:11px;padding:13px}.about-grid{grid-template-columns:1fr;gap:9px}.about-tile{padding:13px}.about-tile p{font-size:11px}.expanded-map{height:260px}.global-result strong{font-size:12px}.global-result small{font-size:9px}.global-result .tag{font-size:9px}.global-result{gap:10px}.toast{font-size:11px;padding:11px 16px;text-align:center;bottom:20px}.article-intro{font-size:17px}.empty-state{min-height:290px;padding:25px}.empty-state p{font-size:11px}.footer-brand{font-size:11px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.resource-type .icon{width:11px;height:11px}.btn .icon{width:14px;height:14px}.note-row>.icon,.card-title>.icon{flex-shrink:0}.text-link:disabled{opacity:.35;transform:none;cursor:default}.tool-output .prompt-code{max-height:none}#resource-results{scroll-margin-top:95px}.empty-state .btn{margin-top:4px}.lab-row-title>.icon{width:15px;height:15px}.featured-project .card-title>.icon{width:21px;height:21px}.filter-option .icon{width:11px;height:11px}.dialog-section .note-row{text-align:left}main:focus{outline:none}
@media(max-width:700px){.desktop-break{display:none}.lab-row-title>.icon{width:13px;height:13px}.featured-project .card-title>.icon{width:20px;height:20px}.hero .eyebrow:after{width:40px}.site-header .brand{gap:8px}}
/* Desktop rhythm follows the approved editorial mockup; mobile keeps touch-friendly spacing. */
@media(min-width:1101px){
.site-header{height:58px}.hero{min-height:300px;padding:29px 0 21px}.hero-art{width:102%}
.quick-card{padding:15px 19px 14px}.quick-title{margin-bottom:8px}.quick-card p{font-size:11px;line-height:1.8}
.section{margin-top:27px}.section-heading{margin-bottom:15px}.section-title h2{font-size:22px}
.project-card .card-cover{height:106px}.project-card .card-body{padding:12px 14px}.project-card .card-desc{line-height:1.75}.project-card .card-bottom{margin-top:9px}
.two-column{margin-top:28px}.two-column .section-heading{margin-bottom:10px}.note-row{padding:9px 1px}
.map-banner{margin-top:27px;min-height:202px;padding:20px 29px}.map-banner .map-graph{height:160px}
.page-hero{min-height:268px;padding-top:21px;padding-bottom:18px}.page-hero .hero-content{align-self:start;padding-top:9px}.page-hero .hero-art{width:102%}
.site-footer{margin-top:28px}.footer-inner{padding:20px 0 22px}.lab-bottom{margin-top:28px}
.resource-card .card-body{padding:11px 13px}.resource-card .card-cover{height:95px}.resource-card .card-bottom{margin-top:8px}
.lab-map .map-graph{height:185px}.featured-project .card-cover{height:181px}
}
@media(max-width:700px){.page-hero .hero-content{align-self:stretch;width:100%;padding-top:0}.resource-hero .search-wrap{width:100%}}
:root{--mountains:url('/art/mountains.webp')}
.skip-link:not(:focus){width:1px;height:1px;clip-path:inset(50%);overflow:hidden;padding:0}
.card-main,.lab-project-row,.experiment-card,.note-row,.quick-card{color:inherit;text-decoration:none}
.footer-links a{font-size:11px;color:var(--muted);text-decoration:none}
.footer-links a:hover{color:var(--navy)}
.subpage{padding-bottom:18px}
.subpage .note-row{grid-template-columns:20px minmax(0,1fr) auto}
.standalone-resource{max-width:780px;margin:35px auto;padding:0 18px}
.standalone-resource h1{font-family:var(--serif);font-size:clamp(27px,4vw,42px)}
.standalone-resource .dialog-cover{max-height:230px}
.standalone-resource .dialog-actions{margin-top:20px}
@media(max-width:700px){.subpage .note-row .meta{white-space:normal;text-align:right}}