:root{color-scheme:dark;--gold:#b99a60;--ink:#10141a;--text:#e8e1d5;--muted:#aaa18e;font:14px -apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif}*{box-sizing:border-box}body{margin:0;color:var(--text);background:linear-gradient(#0b0e12b8,#0b0e12d9),url('/assets/pcb-black-gold-reference.png') center/cover fixed;line-height:1.65}[hidden]{display:none!important}button,input,select,textarea{font:inherit}button,main a,.external-gpt{display:inline-flex;align-items:center;justify-content:center;gap:6px;color:#d3b475;background:linear-gradient(#24282e,#11151a);border:1px solid #796139;border-radius:5px;padding:9px 14px;cursor:pointer;text-decoration:none;box-shadow:inset 0 1px #c6b18322,0 3px 6px #0005;transition:border-color .2s,background .2s}button:hover,main a:hover{border-color:#bda06a;background:#2a2822}button:disabled{opacity:.4;cursor:default}input,select,textarea{color:var(--text);background:#0f1319;border:1px solid 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#model-choice{max-width:230px}#viewer{height:520px;position:relative;background:radial-gradient(ellipse at center,#252a32,#0d1218 75%);border:1px solid #4d4534;border-radius:6px;overflow:hidden}#viewer canvas{display:block;width:100%;height:100%}#model-empty{position:absolute;inset:0;display:grid;place-content:center;text-align:center;pointer-events:none;color:#baab8d}#selection{padding:10px;font-size:11px;color:#aa9a7d}#component-list{display:flex;flex-wrap:wrap;gap:5px;padding-top:10px;max-height:130px;overflow:auto}#component-list label{font-size:10px;display:flex;align-items:center;background:#11151c;border-radius:4px;padding:3px 6px}#model-library{max-height:310px;overflow:auto;margin:14px 0}#model-library button{display:flex;width:100%;justify-content:flex-start;margin:5px 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small{overflow-wrap:anywhere}.resource-request-history{margin-top:20px}video{display:block;width:100%;max-height:450px;background:#080b10;border-radius:5px;margin:12px 0}#demo-list .row{padding:14px 0}dialog{background:#171d25;color:var(--text);border:1px solid #9c7e44;border-radius:9px;width:min(720px,92vw);padding:25px;box-shadow:0 20px 90px #000a}dialog::backdrop{background:#000b;backdrop-filter:blur(3px)}#resource-preview-dialog{width:min(1100px,95vw)}#resource-preview-frame{width:100%;height:65vh;display:block;margin:14px 0;border:1px solid #514631;border-radius:4px;background:#f5f3ec}.login{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:min(420px,94vw);padding:34px;background:linear-gradient(130deg,#22262deF,#10151bef);border:1px solid #a38246;border-radius:9px;box-shadow:0 15px 70px #0008}.login-card .mark img{width:65px;height:65px;object-fit:contain}.login-card h1{font-size:23px;margin:16px 0}.login-card input{margin:15px 0}.login-card button{width:100%}footer{color:#7f735e;font-size:10px;padding:30px 0;letter-spacing:1px}footer span{margin:0 10px}#event-list,#model-answer-list{font-size:11px;overflow-wrap:anywhere}#service-request-list .row,#message-list .row{overflow-wrap:anywhere}@keyframes dark-gold-breath{0%,100%{border-color:#66502e;box-shadow:inset 3px 0 #95733c,0 0 3px #9f78300c}50%{border-color:#917346;box-shadow:inset 3px 0 #b18b4c,0 0 9px #ac84331e}}@keyframes circuit-flow{to{stroke-dashoffset:-1232}}@keyframes pad-glow{0%,100%{opacity:.35}50%{opacity:.7}}@media(min-width:1800px){.resource-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}@media(max-width:1200px){#workspace main{padding:22px}.resource-categories,#resource-categories{grid-template-columns:repeat(2,minmax(0,1fr))}.resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.model-layout{grid-template-columns:minmax(0,1fr) 265px}.hero{padding:25px}.permission-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:800px){#workspace aside{position:static;width:auto;padding:14px}.brand{margin-bottom:12px;max-width:290px}nav{display:flex;overflow:auto}nav button{width:auto;flex:none;min-height:40px}nav button small{display:none}#workspace main{margin:0;padding:16px}.header-info{flex-wrap:wrap;justify-content:flex-end}.hero{grid-template-columns:1fr}.hero-product img{max-height:230px}.model-layout{grid-template-columns:1fr}#viewer{height:430px}.cards,.two{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}.permission-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:520px){.resource-grid{grid-template-columns:1fr}.resource-category{padding:8px;gap:5px}.resource-category svg,.category-thumbnail{width:52px;height:52px;flex-basis:52px}.resource-category strong{font-size:11px}.hero h2{font-size:31px}.header-info{font-size:9px}.permission-grid{grid-template-columns:1fr}article{padding:18px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

.resource-provenance{font-size:10px;padding:7px 9px;border-left:2px solid #826b41;background:#0e141b;margin:8px 0;color:#a99673}.resource-provenance small{display:block;font-size:9px;overflow-wrap:anywhere}.resource-category-count{margin-left:auto;font-size:9px;color:#a88e58}.resource-category-label{font-size:12px}.resource-category-label small{margin-top:3px}

.stat{padding:14px;background:linear-gradient(115deg,#1e242c,#11171e);border:1px solid #625236;border-radius:6px}.stat span,.stat small{display:block}.stat span{font-size:11px;color:#bca779}.stat small{font-size:9px}.account-add-bar small{font-size:11px}

/* Service chat: chronological messages with the composer anchored below. */
.assistant-chat{max-width:1000px;margin:0 auto;padding:0;overflow:hidden}.assistant-chat-top{display:flex;align-items:center;gap:14px;padding:16px 22px;border-bottom:1px solid #77603a44}.assistant-chat-top h3{margin:0}.assistant-chat-top button{margin-left:auto}#assistant-mascot{width:54px;height:54px;display:grid;place-items:center}#assistant-mascot img{width:44px;height:44px;object-fit:contain}#assistant-state{color:#c0ab80}#assistant-history{height:clamp(320px,54vh,650px);overflow:auto;display:flex;flex-direction:column;gap:18px;padding:25px;scroll-behavior:smooth}.chat-message{display:flex;align-items:flex-start;gap:10px;flex-shrink:0}.chat-message>img{width:30px;height:30px;object-fit:contain}.chat-message.user{justify-content:flex-end}.chat-message .bubble{max-width:min(82%,720px);margin:0;padding:13px 17px;white-space:pre-wrap;line-height:1.75;border-radius:3px 15px 15px 15px;background:#262d37;border:1px solid #74634544}.chat-message.user .bubble{background:#3b3221;border-radius:15px 3px 15px 15px;border-color:#9a7c4244}.chat-message small{display:block;font-size:10px;color:#a69a83;margin-top:7px}.chat-welcome{margin:auto;max-width:420px;text-align:center;color:#b8aa91}#assistant-form{padding:16px 22px;border-top:1px solid #77603a44}.assistant-source{display:flex;align-items:center;gap:12px;font-size:11px}.assistant-source select{width:min(80%,600px)}.assistant-composer{display:flex;align-items:flex-end;gap:12px;margin-top:10px}.assistant-composer textarea{resize:vertical;min-height:80px;height:80px;flex:1;margin:0}.assistant-composer button{margin:0;flex:none}.assistant-archive{max-width:1000px;margin:18px auto}.assistant-archive details{padding:12px;border-bottom:1px solid #77603a44}.marketing-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:20px}.marketing-metrics strong{display:block;font-size:24px}.marketing-metrics small{font-size:10px;color:#b1a389}.marketing-account .account-identity h3{margin:0 0 8px}.marketing-messages{margin-top:24px}.contact-fields{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.assembly-guide{margin-top:16px}.model-main{min-width:0}.assembly-steps{display:flex;gap:10px;flex-wrap:wrap}@keyframes duck-idle{0%,100%{transform:translateY(2px) rotate(-4deg)}50%{transform:translateY(-3px) rotate(3deg)}}@keyframes duck-run{0%,100%{transform:translate(2px,1px) rotate(-9deg)}50%{transform:translate(-2px,-5px) rotate(9deg)}}@keyframes duck-roll{from{transform:rotate(0)}to{transform:rotate(360deg)}}@media(max-width:700px){.contact-fields{grid-template-columns:1fr}.assistant-chat-top,#assistant-history,#assistant-form{padding:14px}.chat-message .bubble{max-width:88%}.marketing-metrics{grid-template-columns:repeat(2,1fr)}}

.model-records{margin-top:16px}#event-list{max-height:180px;overflow:auto}#installation-list{margin-top:18px}.model-main .assembly-guide{min-height:190px}

.resource-category-label{display:flex;flex-direction:column;gap:5px;min-width:0}.resource-category-label .category-en{margin:0;font-size:10px;font-weight:600;letter-spacing:1.6px;color:#b69e70;line-height:1.2}.resource-category-label .category-zh{font-size:12px;font-weight:500;line-height:1.4;color:#d1b77b}@media(max-width:520px){.resource-category-label .category-en{font-size:9px}.resource-category-label .category-zh{font-size:11px}}

#pdf-dialog{width:min(1100px,95vw);max-height:92vh}.pdf-top,.pdf-controls{display:flex;align-items:center;gap:12px}.pdf-top h3{margin:0;flex:1}.pdf-controls{flex-wrap:wrap;margin:12px 0}.pdf-controls a{margin-left:auto}#pdf-paper{height:64vh;overflow:auto;background:#343840;border:1px solid #766444;border-radius:4px;padding:12px;display:flex;align-items:flex-start;justify-content:center}#pdf-canvas{background:white;flex:none;box-shadow:0 3px 15px #0006}#pdf-render-state{font-size:11px;color:#bbad90}

.marketing-platforms{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.platform-filter{display:grid;grid-template-columns:1fr auto;column-gap:16px;min-width:90px;padding:9px 14px;text-align:left}.platform-filter small{grid-column:1;font-size:9px;letter-spacing:1.4px;color:#aa9263}.platform-filter span{grid-column:1;font-size:13px}.platform-filter b{grid-column:2;grid-row:1/3;align-self:center;font-size:10px;font-weight:400;color:#aa9263}.platform-filter.current{background:linear-gradient(110deg,#342b1d,#171c23);animation:dark-gold-breath 6.8s ease-in-out infinite}.marketing-account-tags{display:flex;gap:8px;margin-bottom:5px}.platform-badge{color:#d0b77d;border-color:#80683f;background:#2c271d}

#assistant-mascot{width:100px;height:100px;flex:none;background:radial-gradient(ellipse at center,#b99a6012,transparent 70%)}#assistant-mascot canvas{display:block;width:100px;height:100px}#assistant-mascot>img{width:46px;height:46px}

.contact-image-label{display:block;margin:14px 0;font-size:12px;color:#c2b18c}.contact-image-label small{display:block;font-size:10px}.contact-image-label input{margin:8px 0}#message-image-preview{display:flex;align-items:center;gap:12px;margin-bottom:12px}#message-image-preview img,.contact-attachment img{display:block;width:auto;max-width:min(220px,100%);max-height:240px;object-fit:contain;border:1px solid #7c6640;border-radius:5px}.contact-attachment{margin-top:12px}.contact-attachment img{margin:12px 0}.contact-message p{white-space:pre-wrap}

.faq-card{padding:20px}.faq-card-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.faq-card-top small{font-size:10px;color:#a99775}.faq-answer{font-size:13px;line-height:1.8;color:#c8bea9;white-space:pre-wrap}.faq-card details{border-top:1px solid #78613944;padding-top:12px}.faq-card details small{display:block;margin:10px 0;font-size:10px;color:#a99775}.faq-source-actions a{display:inline-block;font-size:11px;padding:7px 12px}#faq-draft-option{display:flex;align-items:center;font-size:11px;white-space:nowrap}#faq-draft-option input{width:15px;margin:0 5px 0 0}

.login-image-loading{padding:24px;border:1px solid #695537;border-radius:6px;background:#11171e;color:#c0ad87;text-align:center;min-height:86px}#account-login-image{display:block;margin:12px 0}#account-login-panel>button{margin:8px 8px 8px 0}

#account-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:16px}#account-list .account-card{min-width:0;margin:0;padding:18px;border:1px solid #75613e;border-radius:8px;background:linear-gradient(120deg,#22272fe8,#11171eed)}.account-card .permission-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.account-card>button{font-size:11px;padding:8px 10px;margin:6px 5px 0 0}.account-card .account-identity{margin-bottom:10px}.workbench-controls{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.workbench-controls select{width:min(350px,100%)}#workbench-image{width:100%;height:auto;border:1px solid #695537;border-radius:6px;margin:12px 0}.workbench-reply{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.workbench-reply textarea{width:100%;min-height:90px}.workbench-reply small{font-size:11px;color:#b3a486}@media(max-width:1050px){#account-list{grid-template-columns:1fr}}

.side-bottom{display:flex;align-items:center;gap:10px;padding:18px 12px 0;margin-top:14px;min-width:0}.side-bottom #health-text{color:#b99a60;white-space:nowrap;font-size:13px;line-height:1.6;animation:service-gold-breathe 4.5s ease-in-out infinite}.side-bottom #health-dot{flex:0 0 5px;margin:0}.side-bottom #logout{margin-left:auto;flex:none;padding:7px 12px}.duck-guide-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.duck-guide-steps button{display:flex;flex-direction:column;padding:14px;gap:3px}.duck-guide-steps button[aria-pressed=true]{border-color:#b99a60;background:#b99a6018;box-shadow:inset 0 0 14px #b99a600a;animation:service-gold-breathe 4.5s ease-in-out infinite}.duck-guide-layout{display:grid;grid-template-columns:1.5fr 1fr;gap:16px;margin:16px 0}.duck-guide-layout article{min-width:0}.duck-guide-layout ol{padding-left:22px}.duck-guide-layout li{padding:12px 0;border-bottom:1px solid #b99a6020}.duck-guide-aside img{display:block;width:100%;height:230px;object-fit:contain}.duck-guide-aside p{font-size:13px}.duck-guide-aside #duck-guide-progress{margin-top:12px;color:#aaa18e;font-size:12px}.duck-entry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.duck-guide-source{margin-top:18px;color:#aaa18e;font-size:12px}@keyframes service-gold-breathe{0%,100%{filter:brightness(.88);text-shadow:0 0 2px #b99a6010}50%{filter:brightness(1.12);text-shadow:0 0 6px #b99a6030}}@media(max-width:800px){.duck-guide-layout{grid-template-columns:1fr}.duck-entry-grid{grid-template-columns:1fr}.duck-guide-steps{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(prefers-reduced-motion:reduce){.side-bottom #health-text,.duck-guide-steps button[aria-pressed=true]{animation:none}}

.duck-features-heading{display:flex;justify-content:space-between;gap:18px;align-items:center;margin:22px 0 10px}.duck-features-heading h3{margin:0}.duck-project-features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.duck-project-features article{padding:18px}.duck-project-features h3{font-size:15px;margin:8px 0}.duck-project-features p{font-size:13px;margin-bottom:12px}.duck-project-features button{font-size:12px;padding:7px 10px}.duck-step-features{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0}.duck-reference-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px}.duck-reference-tabs [aria-pressed=true]{border-color:#b99a60;background:#b99a6018}#duck-reference-frame{width:100%;height:470px;border:1px solid #655534;border-radius:6px;background:#14191f;margin-bottom:18px}@media(max-width:1000px){.duck-project-features{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.duck-project-features{grid-template-columns:1fr}.duck-features-heading{display:block}}
/* Keep actual model controls and long content within the available screen. */
.model-layout,.model-layout>div,.model-main,.viewer-card{min-width:0;max-width:100%;width:100%}
.viewer-toolbar{min-width:0;max-width:100%;flex-wrap:wrap}
.viewer-toolbar>*{min-width:0;max-width:100%}
.viewer-toolbar select{flex:0 1 auto}
.model-layout small,.model-layout p,.model-layout pre,.model-layout #file-list{overflow-wrap:anywhere;word-break:normal}
#viewer{min-width:0;max-width:100%;width:100%}
#viewer canvas{max-width:100%}
@media(max-width:800px){.model-layout{grid-template-columns:minmax(0,1fr)}.viewer-toolbar #model-choice{width:100%;max-width:100%}}