/* Shared V4.3 design tokens: gallery canvas, readable Chinese text, restrained school accent. */
:root{--paper:#fffefa;--surface:#f5f3ed;--ink:#262f2c;--muted:#65726b;--line:#dedfd5;--radius:12px;--space:24px;--shadow:0 8px 32px #34463806;font-size:15px;--brand-soft:color-mix(in srgb,var(--brand) 8%,var(--paper))}body{line-height:1.7}button{font-size:13px;border-radius:7px;padding:10px 16px;font-weight:500}button.primary{box-shadow:0 4px 10px #203a2510}button:hover:not(:disabled){border-color:var(--brand)}button[hidden],[hidden]{display:none!important}summary{cursor:pointer;list-style-position:inside}summary:focus-visible{outline:2px solid var(--brand);outline-offset:5px}h1{font-size:31px;letter-spacing:.4px}h2{font-size:23px}h3{font-size:17px}p{font-size:14px}small{font-size:12px}.sidebar{width:222px;padding:28px 20px;border-right:1px solid var(--line)}.brand{font-size:14px;letter-spacing:.5px}.brand small{font-size:10px;font-weight:400}.sidebar nav{gap:6px}.sidebar nav button{font-size:13px;padding:12px 10px;border-radius:7px;gap:10px}.sidebar nav small{font-size:11px;min-width:18px}.sidebar nav button.active{background:var(--brand-soft);color:var(--brand);font-weight:700}.nav-section-label{font-size:10px;color:var(--muted);margin:24px 10px 8px}.school-selector{margin:0 0 20px;padding:12px 0;font-size:10px}.school-selector select{border-radius:5px;font-size:12px}.sidebar-bottom{font-size:11px;padding-top:16px}.sidebar-bottom p{font-size:11px;margin-bottom:6px}.main-shell{margin-left:222px}.topbar{height:65px;padding:0 36px;font-size:12px;background:var(--paper)}.topbar>div{gap:12px}.topbar-context{color:var(--muted)}main{max-width:1570px;padding:32px 36px 50px}footer{font-size:11px;background:transparent;padding:18px 36px}.eyebrow{font-size:11px;letter-spacing:1px;color:var(--brand);margin-bottom:10px}.badge{font-size:11px;border-radius:20px;padding:4px 10px;font-weight:400;background:#eee9db}.badge.ok{background:#e9f0e7}.paper{border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.page-head{align-items:flex-start;border:0;padding:0;margin-bottom:26px;gap:20px}.page-head h1{margin:10px 0}.page-head p:last-child{font-size:14px}.page-head>button{margin-top:24px;white-space:nowrap}.section-head{margin:30px 0 16px}.section-head h2{font-size:20px}.section-label{font-size:11px;letter-spacing:.5px;color:var(--muted);display:inline-block;margin-bottom:10px}.field{margin:18px 0}.field>span{font-size:13px;font-weight:500}.field input,.field select,.field textarea{font-size:14px;padding:11px 13px;border-radius:7px;background:var(--paper)}textarea{min-height:85px}.actions{gap:10px}.quiet-details{border-top:1px solid var(--line);padding:16px 0;font-size:13px;margin:14px 0}.quiet-details>summary{color:var(--muted);font-size:12px}.quiet-details[open]>summary{margin-bottom:18px}.quiet-details p{font-size:13px}.quiet-details 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figcaption{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(transparent,#182b26dc);color:#fffc;padding:32px 20px 18px;font-size:11px;line-height:1.8}.home-next{display:flex;align-items:center;gap:16px;margin:22px 0 0}.home-next>div{min-width:0}.home-next strong{font-size:13px}.home-next p{font-size:13px;color:var(--muted);margin:6px 0 12px}.home-next .xiaoyi{width:100px;min-width:100px}.current-class .quiet-details{margin:14px 0 0;padding-bottom:0}.current-class .prep-companion{margin:10px 0;border:0;background:var(--brand-soft);padding:15px;gap:12px}.current-class .prep-companion>.xiaoyi{display:none}.current-class .prep-companion h2{font-size:16px;margin-bottom:8px}.current-class .prep-companion p{font-size:12px}.quick-overview{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:24px 0}.quick-overview>button{display:grid;grid-template-columns:1fr auto;text-align:left;padding:16px 20px;background:transparent;border:1px solid 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/* Original, restrained digital docent: slender ink lines, ribbon garment and brass accents. */
.xiaoyi{width:100px;min-width:100px;color:var(--brand)}.xiaoyi.large{width:150px;min-width:150px}.xiaoyi svg{overflow:visible}.xiaoyi figcaption{font-size:10px;letter-spacing:.6px;color:var(--muted)}.agent-coat{fill:currentColor;opacity:.95}.agent-face{fill:#f2e7d5;stroke:#8a9c8b;stroke-width:1.2}.agent-lapel{fill:#eef0e4;opacity:.95}.agent-arm,.agent-feet,.agent-brush,.agent-halo,.agent-ear,.agent-brow,.agent-mouth{stroke-width:1.8}.agent-brow,.agent-mouth{stroke:#526957}.agent-eyes{fill:#344e42}.agent-shadow{opacity:.08}.agent-halo{stroke:#b1a17e;stroke-width:1}.agent-hair{fill:#3b4d45}.agent-scarf{fill:#c4a976;opacity:.92}.agent-palette{fill:#f4eee0;stroke:#a6987c;stroke-width:1}.agent-body{transform-origin:90px 205px}.xiaoyi[data-agent-state=guiding] .front,.xiaoyi[data-agent-state=pointing] .front{transform:rotate(-12deg);transform-origin:116px 128px}.xiaoyi[data-agent-state=guiding] .agent-head{transform:rotate(-3deg);transform-origin:88px 73px}.xiaoyi[data-agent-state=pointing] .agent-brush{transform:rotate(15deg);transform-origin:153px 118px}.xiaoyi[data-agent-state=speaking] .agent-mouth{transform-origin:86px 91px}.xiaoyi[data-agent-state=listening] .agent-head{transform-origin:88px 73px}.xiaoyi[data-agent-state=thinking] .agent-head{transform-origin:88px 73px}.xiaoyi .agent-thought{fill:#b49b6f}.collapsed-companion{padding:15px 20px}.collapsed-companion .companion-top{border:0;margin:0;padding:0}
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@media(max-width:1100px){.sidebar{width:190px;padding:24px 16px}.main-shell{margin-left:190px}main{padding:26px}.topbar{padding:0 26px}.current-class{grid-template-columns:1.2fr 1fr}.current-class-copy{padding:24px}.current-class h2{font-size:25px}.current-class>figure img{max-height:450px}.home-next .xiaoyi{width:80px;min-width:80px}.quick-overview{gap:10px}.quick-overview>button{padding:14px}.art-layout{grid-template-columns:minmax(0,1.4fr) minmax(300px,1fr)}.viewer{height:380px}.art-layout>div:first-child{position:static}.curriculum-unit{grid-template-columns:130px 1fr;gap:20px}.art-companion-column .art-details{display:block}.script-preparation{grid-template-columns:1.6fr 1fr;padding:22px;gap:20px}.script-art{padding:14px}.script-art>img{height:190px}.reading-layout{grid-template-columns:1fr}.resource-card{gap:15px}.project-mode main{padding:28px}.projector .stage-bottom p{font-size:22px}}
@media(max-width:700px){.sidebar{position:relative;width:100%;padding:15px 16px 10px}.brand{font-size:13px;max-width:180px}.brand small{font-size:9px}.crest{height:35px;width:32px;font-size:17px}.school-selector{position:absolute;top:8px;right:14px;width:126px;padding:0;margin:0}.school-selector label{font-size:8px}.school-selector select{padding:4px;font-size:10px;margin-top:4px}.sidebar nav{display:flex;margin-top:16px;overflow:auto;gap:4px;padding-bottom:3px}.sidebar nav button{font-size:11px;padding:8px;flex-shrink:0;white-space:nowrap}.sidebar nav small{display:none}.nav-section-label{display:none} /* P7-PRODUCT-R3：移除残留的 sidebar-bottom 隐藏（v4.css 移动端设计本意是显示演示角色切换按钮） */.main-shell{margin:0}.topbar{height:45px;padding:0 16px;font-size:10px}.topbar>div{gap:7px}.topbar .badge{font-size:9px}main{padding:22px 16px 35px}.welcome{margin-bottom:18px}.welcome h1{font-size:25px;line-height:1.6}.welcome 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strong{font-size:13px}.unit-cards small{font-size:10px}.unit-cards span{font-size:21px}.art-strip{grid-template-columns:1fr 1fr;gap:14px}.art-strip>button:last-child{display:none}.art-strip img{height:105px}.art-strip strong{font-size:13px}.art-strip small{font-size:10px}.page-head h1{font-size:25px}.page-head p:last-child{font-size:13px}.page-head>button{margin-top:8px}.catalog-tools{padding:15px}.unit-tabs button{font-size:11px;padding:7px 9px}.curriculum-unit{grid-template-columns:1fr;gap:12px;margin:25px 0}.unit-heading{gap:15px}.unit-heading>span{font-size:31px}.unit-heading h2{font-size:20px}.lesson-list button{gap:12px}.lesson-list img{width:67px;height:74px}.lesson-list strong{font-size:14px}.lesson-list em{font-size:11px}.lesson-list small{font-size:11px}.lesson-breadcrumb{font-size:11px;margin-bottom:12px!important}.lesson-breadcrumb button{font-size:11px}.lesson-title-row{display:block}.lesson-title-row h1{font-size:23px;line-height:1.6}.lesson-title-row 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h3{font-size:20px}.generation-action{padding-top:16px}.resource-card{padding:18px;flex-wrap:wrap;gap:12px}.resource-card>div{min-width:180px}.resource-card h3{font-size:17px}.resource-card p{font-size:12px}.resource-tabs{gap:5px}.resource-tabs button{font-size:12px}.case-grid,.gallery-grid{grid-template-columns:1fr}.case-card>img{height:170px}.result-row{grid-template-columns:1fr;padding:18px;gap:18px}.result-row .generated-visual{height:190px}.result-row h3{font-size:19px}.result-row .actions{gap:8px}.result-row .actions button{font-size:11px}.reading-layout{grid-template-columns:1fr}.reading-progress{gap:10px;font-size:11px}.reading-banner{gap:8px;font-size:10px}.reading-layout .paper{padding:18px}.reading-layout .paper h2{font-size:20px}.project-mode main{padding:18px 16px}.projector h1{font-size:22px}.projector .stage-art{height:320px}.projector .stage-image-plane{width:auto!important;max-height:290px}.projector .stage-image-plane img{max-height:290px}.projector .stage-bottom p{font-size:17px}.project-exit{font-size:11px;gap:10px}.project-exit button{font-size:11px}.project-answers{padding:20px}.project-answers p{font-size:17px}.projector .callout{font-size:15px}.project-agent-controls .field{min-width:100%}dialog{padding:20px}footer{padding:18px 16px;font-size:10px}.ux-empty{padding:30px 20px}.ux-empty h3{font-size:18px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.agent-body,.agent-head,.agent-mouth{transform:none!important}}

.welcome{position:relative;padding-right:128px}.school-visual{position:absolute;right:0;top:4px;width:108px;height:92px;object-fit:cover;border-radius:3px;box-shadow:0 4px 20px #2221;border:5px solid white}.lesson-start{white-space:nowrap}@media(max-width:600px){.welcome{padding-right:0}.school-visual{display:none}}

.mobile-role{display:none}@media(max-width:600px){.topbar span.mobile-role{display:inline-flex}.mobile-role button{font-size:10px;padding:5px 7px}.topbar-context{display:none}}