/* Shared identity from the Xuedui Education official website. */
:root {
  --ink:#111111; --ink-soft:#1d1d1f; --paper:#f7f6f2; --paper-deep:#ece9e2;
  --white:#fff; --muted:#626260; --accent:#f0522d; --accent-text:#c63c1d;
  --line:rgba(17,17,17,.14); --line-strong:rgba(17,17,17,.25);
  --panel:#fff; --panel-soft:#f7f6f2; --bg:#fff; --bg-deep:#f7f6f2;
  --violet:#c63c1d; --violet-2:#c63c1d; --cyan:#c63c1d; --blue:#345b8a;
  --pink:#a53751; --yellow:#836212; --orange:#c63c1d;
  --success:#1e714b; --danger:#b22c2c; --shadow:none;
  --dd-ink:#111; --dd-muted:#626260; --dd-line:rgba(17,17,17,.14);
  --dd-violet:#c63c1d; --dd-cyan:#c63c1d;
  --brand-bar:calc(64px + env(safe-area-inset-top,0px)); --dd-bar:var(--brand-bar);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
}
html,body{background:var(--paper);color:var(--ink);font-family:var(--font);line-height:1.75}
button,input,select,textarea{font-family:inherit}
button,a,summary{-webkit-tap-highlight-color:transparent}
button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.app-shell{background:#fff;color:var(--ink)}
.app-backdrop,.test-backdrop,.course-visual,.lab-orbit{display:none}
.app-header{position:sticky;top:0;left:0;right:0;height:var(--brand-bar);padding:env(safe-area-inset-top,0px) 20px 0;gap:16px;background:rgba(8,8,8,.97);border-bottom:1px solid rgba(255,255,255,.14);box-shadow:none;z-index:100}
.brand-button{display:flex;align-items:center;gap:22px;text-decoration:none;min-width:0;flex-shrink:1}
.brand-button img{display:block;width:138px;height:auto;flex-shrink:0}
.brand-course-label{display:none;color:#fff;font-size:14px;font-weight:750;white-space:nowrap;border-left:1px solid #555;padding-left:22px}
.official-nav,.official-site-link{display:none}
.official-menu{margin-left:auto;flex-shrink:0}
.official-menu summary{display:flex;align-items:center;justify-content:center;gap:8px;min-width:78px;min-height:42px;padding:0 13px;border:1px solid rgba(255,255,255,.28);border-radius:999px;color:#fff;cursor:pointer;list-style:none;font-size:14px;font-weight:750;line-height:1}
.official-menu summary::-webkit-details-marker{display:none}
.official-menu summary svg{width:17px;height:17px}
.official-menu nav{position:fixed;top:var(--brand-bar);left:0;right:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;padding:12px 16px 18px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.99);box-shadow:0 18px 44px rgba(0,0,0,.13)}
.official-menu nav a{display:flex;align-items:center;min-height:52px;padding:0 14px;border-radius:10px;background:var(--paper);color:var(--ink);font-size:15px;font-weight:750;text-decoration:none}
.official-menu nav a:first-child{grid-column:1/-1}
.official-menu nav a.is-active{color:#fff;background:#111}
.site-sidebar,.tabbar{display:none!important}
.app-shell:has(.site-sidebar){padding:0}
.view{padding:38px 20px 56px;max-width:1320px;min-height:calc(100svh - var(--brand-bar));background:#fff}
.welcome-panel{padding-bottom:32px;margin-bottom:28px;gap:36px;border-color:var(--line);align-items:center}
.welcome-panel h1{font-size:clamp(42px,10vw,60px);font-weight:850;line-height:1.15;letter-spacing:-.045em;margin:12px 0 16px}
.welcome-panel p{color:var(--muted);font-size:16px;line-height:1.75}
.welcome-panel .eyebrow,.eyebrow,.course-no{color:var(--accent-text);font-weight:800;letter-spacing:.04em}
.welcome-progress{border-color:var(--line);color:var(--muted);min-width:184px}
.welcome-progress b{color:#111;font-size:36px;line-height:1.3}
.welcome-progress b small{font-size:16px;color:var(--muted);font-weight:500}
.course-card{padding:26px;border:1px solid var(--line);border-radius:14px;background:var(--paper);box-shadow:none;min-height:310px}
.course-card--violet,.course-card--cyan{background:var(--paper)}
.course-card::before,.course-card::after{display:none}
.course-card h2{color:#111;font-size:clamp(26px,3vw,34px);font-weight:800;line-height:1.35;letter-spacing:-.035em;margin:18px 0 14px}
.course-card p{color:var(--muted);font-size:16px;line-height:1.75}
.tag-row{gap:7px}
.tag-row span{background:#ece9e2;color:#535350;border:0;border-radius:5px;padding:5px 9px;font-size:12px}
.primary-button,.secondary-button,.ghost-button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:50px;padding:12px 20px;border:1px solid #111;border-radius:999px;background:#111;color:#fff;box-shadow:none;font-weight:800;font-size:14px;line-height:1.4}
.secondary-button,.ghost-button{background:transparent;color:#111}
.primary-button:hover{background:#303030}
.secondary-button:hover,.ghost-button:hover{background:var(--paper-deep)}
.course-card .primary-button{border-radius:999px;font-size:14px}
.section-row{margin-top:44px;margin-bottom:22px}
.section-row h2{font-size:clamp(24px,4vw,32px);font-weight:800;letter-spacing:-.035em;color:#111}
.section-row button{color:#111;font-size:14px;font-weight:750;background:transparent;text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:1px}
.home-action-grid{gap:14px}
.home-action{padding:22px 18px;min-height:162px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:none;color:#111}
.home-action::before,.home-action::after{display:none}
.home-action>span{background:var(--paper);color:var(--accent-text);border:1px solid var(--line);border-radius:10px;box-shadow:none}
.home-action b{color:#111;font-size:16px;font-weight:800}
.home-action small{color:var(--muted);font-size:14px}
.mission-card{padding:26px;border:1px solid var(--line);border-radius:14px;background:var(--paper);box-shadow:none}
.mission-card::after,.mission-card::before{display:none}
.mission-meta{color:var(--accent-text);font-size:12px}
.mission-card h3{font-size:24px;font-weight:800;color:#111;letter-spacing:-.03em}
.mission-card p{color:var(--muted)}
.page-hero{padding:0;margin-bottom:32px;background:transparent}
.page-title,.dictionary-hero h1{color:#111;font-size:clamp(32px,7.5vw,46px);font-weight:850;letter-spacing:-.04em;line-height:1.25}
.page-copy,.archive-card p,.lab-card p,.path-step p,.about-panel p{color:var(--muted);font-size:16px;line-height:1.75}
.archive-card,.lab-card,.profile-summary,.about-panel,.quote-card,.artifact-card,.path-step{border:1px solid var(--line);border-radius:12px;background:var(--paper);box-shadow:none}
.lab-card::before,.lab-card::after,.profile-summary::before,.profile-summary::after{display:none}
.lab-card{padding:24px}.lab-icon{color:var(--accent-text);background:#ece9e2;box-shadow:none;border-radius:10px}
.lab-card h3,.artifact-card b,.path-step h3,.about-panel h2{color:#111}
.lab-card .lab-status{color:var(--muted);background:#ece9e2;border-color:var(--line)}
.badge-item i{background:var(--paper);color:#8b8982;box-shadow:none;border-color:var(--line)}
.badge-item.is-earned i{background:#111;color:#fff;border-color:#111;box-shadow:none}
.badge-item b{color:var(--muted);font-size:14px}.badge-item.is-earned b{color:#111}
.profile-summary{padding:28px}.profile-summary p{color:var(--muted)}
.progress-ring-mini{background:conic-gradient(var(--accent) calc(var(--progress)*1%),#e5e2db 0)}
.progress-ring-mini::before{background:var(--paper)}.progress-ring-mini::after{color:#111}
.path-step>span{background:#111;color:#fff;box-shadow:none;border-radius:8px}
.quote-card{color:var(--muted);font-size:17px;line-height:1.9}.quote-card strong{color:var(--accent-text)}
.artifact-card>span{color:var(--accent-text)}.artifact-card p{color:var(--muted)}
.brand-footer{padding:38px 20px 30px;background:#111;color:#fff}
.brand-footer>div,.brand-footer nav,.brand-footer>p{max-width:1240px;margin-left:auto;margin-right:auto}
.brand-footer>div{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:12px}
.brand-footer strong{font-size:23px;font-weight:800;letter-spacing:-.025em}.brand-footer>div span{font-size:14px;color:#bcbcb9}
.brand-footer nav{display:flex;flex-wrap:wrap;gap:12px 26px;padding:22px 0;border-bottom:1px solid rgba(255,255,255,.2)}
.brand-footer a{color:#fff;text-decoration:none;font-size:14px;min-height:32px;display:inline-flex;align-items:center}
.brand-footer>p{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;color:#adadab;font-size:12px;margin-top:22px;margin-bottom:0}
/* Reading and course navigation share the official black header and paper surface. */
.immersive,.reader-page,.dictionary-detail{background:var(--paper);color:#111}
.immersive-header{height:var(--brand-bar);top:0;padding:env(safe-area-inset-top,0px) 16px 0;background:rgba(8,8,8,.98);border-bottom:1px solid #333;box-shadow:none;color:#fff}
.immersive-brand{display:none;text-decoration:none}.immersive-brand img{width:148px;height:auto;display:block}
.immersive-header button{background:transparent;color:#fff;border:1px solid #444;border-radius:999px;width:44px;height:44px;min-height:44px}
.immersive-header b{font-size:16px;color:#fff;font-weight:750}
.immersive-header small{color:#b4b4b1;font-size:12px}
.reader-progress{top:var(--brand-bar);background:#e2ded6}.reader-progress i{background:var(--accent)}
.reader-sidebar{background:#f2f0ea;border-color:var(--line);top:calc(var(--brand-bar) + 3px);height:calc(100dvh - var(--brand-bar) - 3px)}
.reader-sidebar-heading b{color:#111;font-size:21px}.reader-sidebar-heading small{color:var(--muted)}
.reader-sidebar nav button{color:#52524f;border-radius:5px;line-height:1.65;min-height:44px}
.reader-sidebar nav button span{color:#7c7b75}.reader-sidebar nav button.is-current{background:#fff;color:#111;box-shadow:inset 3px 0 var(--accent)}
.reader-sidebar nav button.is-current span{color:var(--accent-text)}.reader-sidebar-links button{color:#111}
.reader-content{max-width:864px;padding-top:30px}.story-visual{border:0;border-radius:12px;background:#e2ded6;box-shadow:none}
.story-visual span{color:#fff;font-size:14px}.image-unavailable .image-fallback{color:#444}
.story-gallery{color:var(--muted)}.story-gallery img{border-radius:8px;background:#e2ded6}
.story-card,.terms-page,.insight-page{padding:28px 24px;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:none}
.story-meta{color:var(--accent-text);font-size:12px;font-weight:750}
.story-card h1,.terms-page h1,.insight-page h1{color:#111;font-size:clamp(27px,3.1vw,36px);line-height:1.4;font-weight:850;letter-spacing:-.035em}
.story-body{color:#333;font-size:17px;line-height:1.95}.story-body b,.story-body strong{color:#111;font-weight:800}
.inline-term{color:var(--accent-text);text-decoration-color:rgba(198,60,29,.4)}
.term-chips button,.related-terms button{background:var(--paper);color:#333;border:1px solid var(--line);border-radius:8px;font-size:14px;box-shadow:none}
.term-card{padding:20px;background:var(--paper);border-radius:10px;border-color:var(--line)}
.term-card h2{color:#111}.term-card header span{color:var(--accent-text)}.term-card p,.term-card small{color:var(--muted);line-height:1.8}
.insight-quote{background:var(--paper);border-left:3px solid var(--accent);border-radius:0;color:#333;line-height:1.9}
.insight-rules div{background:var(--paper);border-radius:8px;border-color:var(--line);color:var(--muted)}.insight-rules b{color:#111}
.reader-controls{background:rgba(247,246,242,.97);border-color:var(--line);box-shadow:0 8px 32px rgba(0,0,0,.08);border-radius:999px;padding:7px;gap:10px}
.reader-controls button{border-radius:999px;font-size:14px;min-height:48px}
.preparation-note{background:#fff;border-color:var(--line);color:var(--muted)}.preparation-note summary{color:#111}
.chapter-item{border-radius:10px;background:#fff;border-color:var(--line);box-shadow:none}.chapter-item>span{background:#ece9e2;color:#111;border-radius:8px}
.chapter-item b{color:#111}.chapter-item small,.chapter-item>i{color:var(--muted)}.chapter-item.is-done>span{background:#e4eee7;color:#1e714b}
.summary-panel h1{color:#111}.summary-panel>p{color:var(--muted)}.summary-flow span{background:var(--paper);border-radius:10px;border-color:var(--line);color:#111}.summary-flow small{color:var(--accent-text)}
.summary-division section{background:var(--paper);border-color:var(--accent)}.summary-division h2{color:#111}.summary-division p{color:var(--muted)}
.course-gate{background:var(--paper)}.gate-art{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:28px;padding:32px;background:#111;border-radius:14px;border:0;box-shadow:none;min-height:200px}
.gate-art::before,.gate-art::after{display:none}.gate-logo{display:block;width:240px;max-width:90%;height:auto;position:relative;z-index:2}
.gate-art span{position:static;color:#bdbdb8;font-size:12px;letter-spacing:.06em;text-align:center}.gate-copy h1{color:#111;font-weight:850;letter-spacing:-.035em}.gate-copy p{color:var(--muted)}
.gate-form label{color:#111}.gate-row input{background:#fff;color:#111;border-color:var(--line-strong);border-radius:10px;font-size:16px}.gate-error{color:#b22c2c}
.course2-launch,.course2-launch--full,.course2-principle{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:none}
.course2-launch::before,.course2-launch::after{display:none}.course2-launch h1{color:#111;font-weight:850;letter-spacing:-.035em}.course2-launch>p:not(.eyebrow),.course2-principle p{color:var(--muted)}
.course2-scope{border-color:var(--line)}.course2-scope b{color:#111}.course2-scope span{color:var(--muted)}
.part-entry{background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:none}.part-number{background:#ece9e2;color:var(--accent-text);box-shadow:none;border-radius:8px}
.part-entry h2{color:#111}.part-entry p{color:var(--muted)}.part-entry small,.part-entry em{color:var(--accent-text)}.part-entry>i{color:var(--muted)}
.course2-native .part-entry .part-cover{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;border-radius:8px;margin:0 0 16px;background:#eee7dc}
.course2-native .part-entry>div{width:100%}
.course2-native .part-entry{display:flex;flex-direction:column;align-items:stretch;gap:14px}
.course2-native .part-entry .part-number{align-self:flex-start;margin-bottom:0}
.course2-native .part-entry>i{display:none}
.course2-completeness{color:var(--muted)}.course2-completeness b{color:#111}.course2-completeness>div{background:#e5e2db}.course2-completeness i{background:var(--accent)}
/* Dictionary and practice surfaces. */
.dictionary-hero{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:28px;box-shadow:none}
.dictionary-hero::before,.dictionary-hero::after{display:none}.dictionary-hero>p:not(.eyebrow){color:var(--muted)}
.dictionary-search{background:#fff;border:1px solid var(--line-strong);border-radius:999px;color:var(--accent-text)}.dictionary-search input{background:transparent;color:#111}.dictionary-search input::placeholder{color:#797974}
.dictionary-filters button{border:1px solid var(--line);border-radius:999px;background:#fff;color:#444;font-size:14px}.dictionary-filters button.is-active{background:#111;border-color:#111;color:#fff}
.term-feature,.term-entry,.dictionary-banner{background:var(--paper);border:1px solid var(--line);border-radius:12px;box-shadow:none}.term-feature::after{display:none}
.term-feature h2,.term-entry h3,.dictionary-banner b{color:#111}.term-feature p,.term-entry p,.dictionary-banner small{color:var(--muted)}.term-feature>span,.term-entry>span{color:var(--accent-text)}.term-entry>i,.dictionary-banner>i{color:#777}
.dictionary-banner>span{background:#ece9e2;color:var(--accent-text);border-radius:8px}
.dictionary-detail-main>h1{color:#111}.definition-card,.example-card,.term-memory{background:#fff;border-color:var(--line);border-radius:12px;box-shadow:none}.definition-card p,.example-card p,.term-memory p{color:#333}.definition-card>span,.example-card>span{color:var(--accent-text)}
.game-stage,.game-complete,.task-card,.workflow-brief,.glossary-clue{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:none}.game-stage::before,.game-stage::after,.game-complete::before,.game-complete::after{display:none}
.game-stage h1,.task-card h2,.workflow-brief h2,.game-complete h1{color:#111;font-weight:800}.game-stage p,.task-card p,.game-complete p{color:var(--muted)}
.game-scorebar,.game-feedback{color:var(--muted)}.score-pill{background:var(--paper);border:1px solid var(--line);color:#111}
.tech-token,.decision-grid button,.module-bank button,.glossary-choices button{background:var(--paper);border:1px solid var(--line);border-radius:10px;box-shadow:none;color:#111}
.tech-token span{color:var(--muted)}.tech-token b{color:#111}.tech-token.is-correct,.glossary-choices button.is-correct{background:#e4eee7;border-color:#4c7d5b;color:#195f3f}
.tech-token.is-wrong,.glossary-choices button.is-wrong{background:#f8e5de;border-color:#bf6750;color:#a23219}
.timeline-progress i{background:#e2ded6}.timeline-progress i.is-done{background:var(--accent)}
.task-card>span,.workflow-brief small,.glossary-clue>span{color:var(--accent-text)}
.workflow-slot{background:var(--paper);border-color:var(--line);border-radius:8px}.workflow-slot>span{color:var(--accent-text);background:#ece9e2}.workflow-slot>b{color:#111}.workflow-slot>em{color:var(--muted)}
.module-bank button.is-used{background:#e4eee7;color:#195f3f}.glossary-clue p{color:#111}.glossary-clue small{color:var(--muted)}
.reward-orb{background:#111;color:#fff;box-shadow:none;border:0}.toast{background:#111;color:#fff;border:1px solid #444;box-shadow:0 8px 28px rgba(0,0,0,.12)}
.brand-mark,.brand-mark--large{width:210px;height:74px;border-radius:10px;background:#111 url('xuedui-signature-white.png') center/174px auto no-repeat;box-shadow:none;animation:none}.brand-mark::after{display:none}
.boot-screen{background:var(--paper);color:#111}.boot-screen small{color:var(--muted)}
.skip-link{color:#fff;background:var(--accent-text)}
/* Full lesson documents keep their original diagrams and workflows. */
body.dd-course-page{background:var(--paper)!important;color:#111;--paper:#f7f6f2;--ink:#111;--muted:#626260;--violet:#c63c1d;--aqua:#c63c1d;--coral:#c63c1d;--navy:#111}
.dd-course-bar{height:var(--brand-bar);background:rgba(8,8,8,.98);border-color:#333;box-shadow:none;padding:env(safe-area-inset-top,0px) 12px 0}
.dd-official-logo{display:none}.dd-official-logo img{width:148px;height:auto;display:block}
.dd-course-heading b{color:#fff;font-size:15px}.dd-course-heading small,.dd-course-brand{color:#b4b4b1;font-size:12px}
.dd-course-back,.dd-course-menu{border-color:#444;background:transparent;color:#fff;border-radius:999px;width:44px;height:44px}.dd-course-progress{background:#e2ded6}.dd-course-progress i{background:var(--accent)}
.dd-course-drawer{background:var(--paper);border-color:var(--line);box-shadow:none}.dd-drawer-head{border-color:var(--line)}.dd-drawer-head b{color:#111}.dd-drawer-head span{color:var(--muted)}.dd-drawer-close{background:#ece9e2;color:#111;border-radius:999px}
.dd-part-tabs a{background:#fff;color:#555;border-color:var(--line);border-radius:10px}.dd-part-tabs a.is-current{color:#111;background:#fff;border-color:var(--line);box-shadow:inset 3px 0 var(--accent)}
.dd-course-toc button{color:#333;background:#fff;border-color:var(--line);border-radius:8px}.dd-course-toc button.is-current{background:#fff;color:#111;border-color:#c63c1d}.dd-toc-index{background:#ece9e2;color:var(--accent-text);border-radius:6px}.dd-toc-title{font-weight:650}.dd-course-toc button.is-complete .dd-toc-index{background:#e4eee7;color:#1e714b}.dd-toc-label{color:var(--muted)}
.dd-drawer-actions{border-color:var(--line)}.dd-drawer-actions a,.dd-drawer-actions button{border-color:var(--line);border-radius:999px;background:transparent;color:#111}
.dd-course-page .workspace{background:var(--paper)}.dd-course-page .card{border-radius:12px;border-color:var(--line);box-shadow:none;background:#fff}.dd-course-page .page-head h1{color:#111;font-weight:850;letter-spacing:-.035em}.dd-course-page .page-head p{color:var(--muted)}
.dd-course-page .fixed{background:rgba(247,246,242,.98);border-color:var(--line);border-radius:999px;box-shadow:0 8px 28px rgba(0,0,0,.08)}.dd-course-page .fixed .n,.dd-course-page .fixed #fixedNext{background:#111;color:#fff;border-radius:999px}.dd-course-page .fixed .p,.dd-course-page .fixed #fixedPrev{background:#ece9e2;color:#111;border-radius:999px}.dd-course-page .fixed span{color:#555}
.dd-map-page .hero,.dd-map-page .section{background:transparent!important}.dd-map-page .section-title{color:#111}.dd-map-page .section-copy{color:var(--muted)}.dd-map-page .eyebrow{color:var(--accent-text)}.dd-map-page .eyebrow::before{background:var(--accent)}
/* Same typography and palette for the live PHP assessment. */
.test-app{background:var(--paper);color:#111;border-color:var(--line);box-shadow:none}
.intro-screen{padding:0 20px 28px;background:var(--paper)}.intro-top{height:var(--brand-bar);margin:0 -20px;padding:env(safe-area-inset-top,0px) 20px 0;background:#080808}
.selftest-official-logo{width:138px;height:auto;display:block}.intro-brand{gap:14px}.intro-brand>div{display:none}.intro-brand b{color:#fff}.intro-brand small{color:#aaa}
.intro-top .back-link{background:transparent;border-color:#444;color:#fff;border-radius:999px}.intro-hero{padding-top:36px}.intro-hero h1{color:#111;font-weight:850;letter-spacing:-.04em}.intro-hero h1 span{color:var(--accent-text)}.intro-copy{color:var(--muted)}.intro-kicker{color:var(--accent-text)}
.readiness-console{background:#fff;border-color:var(--line);border-radius:14px;box-shadow:none}.console-top{border-color:var(--line);color:var(--muted)}.console-top i{background:var(--accent);box-shadow:none}.scan-ring{background:conic-gradient(var(--accent) 270deg,#ece9e2 0);box-shadow:none}.scan-ring>div{background:#fff}.scan-ring b{color:#111}.scan-ring span{color:var(--muted)}.console-stats b{color:#111}.console-stats span{color:var(--muted)}.console-stats i{background:#ece9e2}.console-stats i::after{background:var(--accent)}.intro-note{color:var(--muted)}
.test-flow{background:var(--paper)}.flow-header{background:#080808;border-color:#333}.flow-heading b{color:#fff}.flow-heading span{color:#b4b4b1}.header-count{background:transparent;color:#fff;border-color:#444;border-radius:999px}.flow-header .icon-button{background:transparent;border-color:#444;color:#fff;border-radius:999px}.flow-progress{background:#333}.flow-progress i{background:var(--accent)}
.flow-main,.result-main{background:var(--paper)}.stage-intro h1{color:#111;letter-spacing:-.035em;font-weight:850}.stage-intro p:not(.eyebrow){color:var(--muted)}
.field>span{color:#111}.field>span i{color:var(--muted)}.field input,.field select,.field textarea{background:#fff;border-color:var(--line-strong);color:#111;border-radius:10px}.field input::placeholder,.field textarea::placeholder{color:#7b7b75}
.tool-panel{background:#fff;border-color:var(--line);border-radius:12px}.tool-panel>b{color:#111}.tool-chip{background:var(--paper);color:#555;border-color:var(--line);border-radius:999px}.tool-chip.is-selected{color:#fff;background:#111;border-color:#111}
.question-title{color:#111}.question-type{background:#fff;border-color:var(--line);color:var(--accent-text)}.dimension-tag{color:var(--accent-text)}.dimension-tag i{background:#ece9e2;color:var(--accent-text)}.question-context{background:#fff;border-color:var(--accent);color:var(--muted)}
.answer-card{background:#fff;border-color:var(--line);color:#111;border-radius:10px;box-shadow:none}.answer-card>i{background:#ece9e2;color:#555;border-radius:8px}.answer-card b{color:#111}.answer-card small{color:var(--muted)}.answer-card.is-selected{background:#fff5ee;border-color:var(--accent-text)}.answer-card.is-selected>i{background:#111;color:#fff}.answer-card.is-selected>span:last-child{color:var(--accent-text)}
.flow-footer{background:var(--paper);border-color:var(--line)}.consent-card{background:#fff;color:#444;border-color:var(--line);border-radius:10px}.consent-card i{border-color:#777}.consent-card.is-selected{background:#fff5ee;border-color:var(--accent-text)}.consent-card.is-selected i{background:#111;border-color:#111;color:#fff}
.result-hero,.calibration-note{background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:none}.result-hero h1{color:#111}.result-hero p,.level-tagline,.calibration-note p,.suggestions li,.result-note{color:var(--muted)}.dimension-bar>span,.dimension-bar>b{color:#111}.dimension-bar>div{background:#ece9e2}.dimension-bar i{background:var(--accent)}.test-toast{background:#111;color:#fff;border-color:#444}.test-boot{background:var(--paper);color:#111}.test-brand:not(.test-brand--small){width:210px;height:74px;border-radius:10px;background:#111 url('xuedui-signature-white.png') center/174px auto no-repeat;box-shadow:none;animation:none}.test-brand::after{display:none}
.decision-grid button:first-child,.decision-grid button:last-child{background:var(--paper);color:#111;border:1px solid var(--line)}
.result-header{background:#080808;border-color:#333;color:#fff}.result-header b{color:#fff;font-size:16px}.result-header small{color:#b4b4b1;font-size:12px}.result-header .icon-button,.result-header .back-link{background:transparent;border-color:#444;color:#fff;border-radius:999px}
.result-card{background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:none;color:#111}.result-card h2,.result-card h3{color:#111}.result-card p{color:var(--muted)}.result-score::before{background:var(--paper)}.result-score b{color:#111}.result-score span{color:var(--muted);font-size:12px}
.dd-course-page h1,.dd-course-page h2,.dd-course-page h3{font-family:var(--font)}
.dd-course-page .skill-side.card,.dd-course-page .token-panel.card,.dd-course-page .review-top.card{background:#111;color:#fff;border-color:#111}
.dd-course-page .skill-side.card h2,.dd-course-page .token-panel.card h2,.dd-course-page .review-top.card h2,.dd-course-page .review-top .accept h3{color:#fff}
.dd-course-page .skill-side.card p,.dd-course-page .token-panel.card p,.dd-course-page .review-top.card p,.dd-course-page .token-panel .budget,.dd-course-page .skill-side .term{color:#d4d4ce}
.dd-course-page .skill-side .term b,.dd-course-page .token-panel .budget::before,.dd-course-page .review-top .accept .a-no{color:#ff997e}
.dd-course-page .token-chain span{background:rgba(255,255,255,.06);border-color:#444;color:#eee}.dd-course-page .token-chain span:nth-child(2),.dd-course-page .token-chain span:nth-child(5),.dd-course-page .token-chain span:nth-child(4){color:#ffb39e}
.dd-course-page .skill-side.card::after,.dd-course-page .token-panel.card::after,.dd-course-page .review-top.card::after{color:rgba(255,255,255,.04)}
@media(min-width:640px){.summary-panel{padding-top:8px}.story-card,.terms-page,.insight-page{padding:36px 32px}.welcome-panel h1{font-size:56px}.view{padding:44px 40px 68px}.brand-footer{padding:44px 40px 34px}.dictionary-hero{padding:36px}}
@media(min-width:768px){:root{--brand-bar:calc(76px + env(safe-area-inset-top,0px))}.app-header{padding-right:40px;padding-left:40px}.brand-button img{width:148px}.brand-course-label{display:inline}.immersive-brand{display:block}.immersive-header{grid-template-columns:168px 44px minmax(0,1fr) 44px;gap:14px;padding-right:24px;padding-left:24px}.dd-official-logo{display:block}.dd-course-bar{grid-template-columns:168px 48px minmax(0,1fr) 48px;gap:14px;padding-right:24px;padding-left:24px}.intro-screen{padding:0 36px 36px}.intro-top{margin:0 -36px;padding-right:36px;padding-left:36px}.selftest-official-logo{width:148px}.intro-brand>div{display:block;padding-left:18px;border-left:1px solid #555}.intro-hero{padding-top:40px}.brand-footer strong{font-size:28px}}
@media(min-width:1024px){.app-header{padding-right:max(40px,calc((100vw - 1240px)/2));padding-left:max(40px,calc((100vw - 1240px)/2));gap:28px}.brand-course-label{display:none}.official-nav{display:flex;align-items:stretch;justify-content:center;gap:24px;height:100%;margin-left:auto}.official-nav a{position:relative;display:flex;align-items:center;color:#bcbcb9;text-decoration:none;font-size:14px;font-weight:750;white-space:nowrap}.official-nav a.is-active{color:#fff}.official-nav a.is-active::after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;background:var(--accent)}.official-site-link{display:inline-flex;align-items:center;color:#c7c7c3;font-size:13px;text-decoration:none;white-space:nowrap}.official-menu{display:none}.view{padding:52px 40px 76px}.welcome-panel h1{font-size:60px}.course-card{padding:30px;min-height:324px}.section-row{margin-top:52px}.home-action{min-height:166px}.reader-layout{grid-template-columns:260px minmax(0,1fr)}.reader-sidebar{padding-top:28px}.reader-content{padding:36px 32px 120px}.reader-controls{left:calc(50% + 130px);width:calc(100% - 324px);max-width:800px}.course-gate{gap:44px}.gate-art{min-height:320px}.intro-screen{padding:0 48px 36px}.intro-top{margin:0 -48px;padding-right:48px;padding-left:48px}}
@media(min-width:1180px){.dd-course-bar{grid-template-columns:208px 48px minmax(0,1fr);gap:18px}.dd-course-heading{text-align:left}.dd-course-heading b{font-size:17px}.dd-course-overlay{top:var(--brand-bar);background:var(--paper)}.dd-course-drawer{border-radius:0}.dd-part-tabs a{border-radius:6px}.dd-course-page .page-head h1{font-size:clamp(36px,3.6vw,48px)}}
@media(max-width:374px){.app-header{padding-right:14px;padding-left:14px;gap:10px}.brand-button img{width:130px}.view{padding-right:16px;padding-left:16px}.course-card{padding:22px}.course-card h2{font-size:26px}.welcome-panel h1{font-size:42px}.home-action{padding:18px 12px}.home-action small{font-size:13px}.immersive-header{padding-right:10px;padding-left:10px}.immersive-header b{font-size:14px}.story-card,.terms-page,.insight-page{padding:24px 18px}.dictionary-hero{padding:24px 18px}.story-card h1{font-size:27px}.intro-screen{padding-right:14px;padding-left:14px}.intro-top{margin-right:-14px;margin-left:-14px;padding-right:14px;padding-left:14px}.selftest-official-logo{width:130px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}