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#xr-education .wrap{max-width:1200px;padding-left:32px;padding-right:32px}
#xr-education .hero{background:#f5f7fa;padding:54px 0 58px;border-bottom:1px solid #e3e6eb}
#xr-education .hero h1{font-weight:700;font-size:clamp(28px,3.5vw,44px);line-height:1.55;letter-spacing:-.025em}
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#xr-education .eyebrow{font-weight:600;letter-spacing:.08em}
#xr-education .lead{font-size:16px;line-height:2;max-width:850px}
#xr-education .layout{padding-top:48px;padding-bottom:64px;gap:36px}
#xr-education .toc{top:108px}
#xr-education .lesson section{border-radius:8px;scroll-margin-top:104px}
#xr-education .lesson h2{font-weight:700}
#xr-education .lesson h3{font-weight:700}
#xr-education ul:not(.goals){list-style:disc;padding-left:1.4em}
#xr-education ol{list-style:decimal;padding-left:1.4em}
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#xr-education a:not(.button){text-underline-offset:4px}
#xr-education .back-bottom{margin-bottom:0}
@media(max-width:767px){#xr-education{margin-top:64px}#xr-education .wrap{padding-left:20px;padding-right:20px}#xr-education .hero{padding:32px 0 36px}#xr-education .crumb{font-size:11px;margin-bottom:24px}#xr-education .layout{padding-top:28px;gap:20px}#xr-education .lesson section{padding:22px 18px}#xr-education .hero h1{font-size:28px}#xr-education .lead{font-size:14px}}

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#xr-education{font-size:15px;color:#1b2030;background:white}
#xr-education strong,#xr-education b{font-weight:700}
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#xr-education .lesson section{scroll-margin-top:110px}
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#xr-education .topic:last-child{border-bottom:0;padding-bottom:0}
#xr-education .topic h3{margin:8px 0 12px;font-size:20px}
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#xr-education .scene-top{color:#24385d;background:#edf2ff;flex-wrap:wrap}
#xr-education .stage{grid-template-columns:85px minmax(0,1fr) 85px;min-height:270px;padding:26px 20px}
#xr-education .stage .speech{min-width:0;overflow-wrap:anywhere}
#xr-education .scene-caption{line-height:1.9;min-height:105px}
#xr-education .avatar-label{white-space:normal;line-height:1.6}
#xr-education .speech p{font-size:15px;line-height:1.9}
#xr-education .scene .person{animation:manners-idle 3s ease-in-out infinite}
#xr-education .stage.animate .speech{animation:manners-arrive .45s ease both}
#xr-education .stage.animate .person{animation:manners-nod .65s ease}
#xr-education .text-script{padding:8px 20px 20px}
#xr-education .text-script h3{font-size:15px;margin:16px 0 5px}
#xr-education .text-script p{font-size:14px;margin:5px 0}
#xr-education .practice{padding:20px;margin:20px 0;border-radius:8px;border:1px solid #e3e6eb}
#xr-education .practice h3{font-size:17px;margin:0 0 12px}
#xr-education .option{font-size:14px;text-align:left;font-weight:400;white-space:normal;line-height:1.8}
#xr-education .feedback{font-size:14px}
#xr-education .example{margin:22px 0 30px}
#xr-education .example h3{margin:0 0 14px}
#xr-education .compare{align-items:stretch}
#xr-education .compare>div{min-width:0}
#xr-education .compare p{white-space:pre-line;font-size:14px;line-height:1.9}
#xr-education .step-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:20px 0}
#xr-education .step-list>div{background:#f4f7fc;padding:16px;border:1px solid #e3e6eb;border-radius:6px;font-size:13px}
#xr-education .step-list strong{display:block;color:#2f60ef;font-size:15px;margin-bottom:8px}
#xr-education .mini-work{border-left:3px solid #2f60ef;background:#f5f7fa;padding:20px;margin:24px 0}
#xr-education .mini-work p{margin:8px 0}
#xr-education .course-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;padding-top:36px;padding-bottom:64px}
#xr-education .course-card{border:1px solid #e3e6eb;border-radius:8px;padding:28px;display:flex;flex-direction:column;min-width:0;box-shadow:0 2px 10px #14223d03}
#xr-education .course-card h2{font-weight:700;font-size:24px;line-height:1.5;margin:10px 0 14px}
#xr-education .course-card p{color:#646d7e;font-size:14px;line-height:1.9;margin-bottom:18px}
#xr-education .course-card .button{align-self:flex-start;margin-top:auto}
#xr-education .course-intro{padding-top:48px}
#xr-education .course-intro h2{font-weight:700;font-size:28px;margin:0 0 14px}
#xr-education .course-intro p{color:#646d7e;margin:12px 0}
#xr-education .course-card:hover{border-color:#8da9fa}
#xr-education .progress-dots button{min-height:12px}
#xr-education .toc a.active{color:#2f60ef;font-weight:700}
#xr-education .motion-off-label{display:flex;gap:8px;align-items:center;font-size:13px;margin:14px 0}
#xr-education .motion-off-label input{width:17px;height:17px;accent-color:#2f60ef}
#xr-education.motion-off *,#xr-education.motion-off *::before,#xr-education.motion-off *::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
@keyframes manners-idle{0%,100%{transform:translateY(0)}50%{transform:translateY(-3px)}}
@keyframes manners-arrive{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@keyframes manners-nod{0%,100%{transform:rotate(0)}40%{transform:rotate(4deg)}}
@media(prefers-reduced-motion:reduce){#xr-education *,#xr-education *::before,#xr-education *::after{animation:none!important;transition:none!important}}
@media(max-width:980px){#xr-education .layout{grid-template-columns:minmax(0,1fr)}#xr-education .toc{position:static;display:block;overflow:visible;border-bottom:1px solid #e3e6eb;padding-bottom:14px}#xr-education .toc a{display:inline-block;padding:6px 10px 6px 0;white-space:normal}#xr-education .toc .unit{display:none}}
@media(max-width:767px){#xr-education .layout{padding-left:20px;padding-right:20px}#xr-education .lesson h2{font-size:23px}#xr-education .topic h3{font-size:18px}#xr-education .stage{grid-template-columns:62px minmax(0,1fr);gap:12px;padding:22px 14px;min-height:280px}#xr-education .stage>.avatar:last-child{display:none}#xr-education .stage .person{transform:scale(.8);transform-origin:center}#xr-education .speech{padding:15px}#xr-education .speech strong{font-size:15px}#xr-education .speech p{font-size:14px}#xr-education .scene-top{padding:12px 14px}#xr-education .scene-caption{padding:14px;min-height:120px}#xr-education .compare{grid-template-columns:minmax(0,1fr)}#xr-education .step-list{grid-template-columns:repeat(2,minmax(0,1fr))}#xr-education .course-links{grid-template-columns:minmax(0,1fr);gap:16px;padding-top:24px}#xr-education .course-card{padding:24px}#xr-education .course-card h2{font-size:22px}#xr-education .controls .step-count{width:100%;margin-left:0}#xr-education .hint{padding:16px}#xr-education .course-intro h2{font-size:24px}}

#xr-education .lab{border:1px solid #b9ccf9;background:#f6f8ff;border-radius:10px;padding:24px;margin:24px 0}
#xr-education .lab h3{margin:0 0 12px;font-size:21px}
#xr-education .lab .lab-caption{font-size:13px;color:#5a6880;margin:8px 0 20px}
#xr-education .lab-board{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:20px 0}
#xr-education .lab-node{background:white;border:1px solid #cfd9ec;border-radius:8px;padding:18px 15px;min-width:0;font-size:14px;overflow-wrap:anywhere}
#xr-education .lab-node b{display:block;color:#2f60ef;margin-bottom:10px;font-size:13px}
#xr-education .lab-node.active{border-color:#2f60ef;box-shadow:0 0 0 2px #2f60ef19;animation:lab-glow .6s ease}
#xr-education .lab-node.blocked{background:#fff4e7;border-color:#d8a04a}
#xr-education .lab-result{background:white;border-left:3px solid #2f60ef;border-radius:0 6px 6px 0;padding:16px 18px;white-space:pre-line;font-size:14px;line-height:1.9;margin:18px 0 0}
#xr-education .lab button{margin:4px 4px 4px 0}
#xr-education .lab label{display:flex;gap:10px;align-items:flex-start;font-size:14px;line-height:1.9;margin:12px 0}
#xr-education .lab input[type=checkbox]{width:18px;height:18px;flex-shrink:0;accent-color:#2f60ef;margin-top:5px}
#xr-education .lab select{font:inherit;background:white;color:#1b2030;border:1px solid #9bb0d8;border-radius:5px;padding:9px 12px;max-width:100%}
#xr-education .lab code,#xr-education .lab pre{font-size:13px;white-space:pre-wrap;overflow-wrap:anywhere}
#xr-education .lab pre{margin:0}
#xr-education .lab .table-wrap{background:white;border:1px solid #d5dfef;border-radius:6px;padding:8px;margin:18px 0}
#xr-education .lab table{min-width:280px}
#xr-education .lab .mismatch{background:#fff1dc}
#xr-education .glossary{display:grid;grid-template-columns:160px minmax(0,1fr);gap:0;margin:22px 0}
#xr-education .glossary dt,#xr-education .glossary dd{border-bottom:1px solid #e3e6eb;padding:15px 10px;line-height:1.8}
#xr-education .glossary dt{color:#2f60ef;font-weight:700;background:#f5f7fc;font-size:14px}
#xr-education .glossary dd{font-size:14px;margin:0}
#xr-education .lab-task{margin:22px 0;padding:20px;border:1px solid #e3e6eb;border-radius:8px}
#xr-education .lab-task h3{font-size:17px;margin:0 0 10px}
#xr-education .diagram{display:flex;align-items:stretch;gap:10px;flex-wrap:wrap;padding:20px;background:#f4f7fc;border:1px solid #dce5f5;border-radius:8px;margin:22px 0}
#xr-education .diagram>span{flex:1;min-width:95px;padding:13px 10px;background:white;border:1px solid #cad8f1;border-radius:6px;text-align:center;font-size:13px;color:#27437e}
#xr-education .diagram>i{align-self:center;font-style:normal;color:#2f60ef}
#xr-education .sources{font-size:13px;line-height:1.9}
#xr-education .sources li{margin:10px 0}
@keyframes lab-glow{from{transform:translateY(3px);opacity:.6}to{transform:translateY(0);opacity:1}}
@media(max-width:767px){#xr-education .lab{padding:18px 14px}#xr-education .lab-board{grid-template-columns:minmax(0,1fr)}#xr-education .lab-node{padding:14px}#xr-education .glossary{grid-template-columns:minmax(0,1fr)}#xr-education .glossary dd{padding-top:10px;padding-bottom:18px}#xr-education .diagram{padding:14px;gap:8px}#xr-education .diagram>span{min-width:100px}}

#xr-education .dns-terminal{background:#15213b;color:#e5edff;border:1px solid #263e67;border-radius:7px;padding:20px;margin:18px 0;overflow:auto}#xr-education .dns-terminal pre{font:13px/1.9 ui-monospace,SFMono-Regular,Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere;color:inherit}#xr-education .lab .lab-board span{white-space:pre-line}#xr-education .lab label.lab-select{display:block}#xr-education .lab .lab-select select{display:block;width:100%;min-width:0;margin-top:8px}