.lesson-index-section,.lesson-read-section{padding-block:64px}
.lesson-index-intro{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:42px}
.lesson-index-intro>div{min-width:0;max-width:900px}
.lesson-index-intro .eyebrow{margin-bottom:15px}
.lesson-index-intro h2{font-size:32px;line-height:1.25;margin-bottom:18px}
.lesson-index-intro p{color:var(--muted);font-size:17px}
.lesson-index-intro .btn{flex-shrink:0}
.lesson-index-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.lesson-index-list>li{scroll-margin-top:180px;border-bottom:1px solid var(--line)}
.lesson-index-link{display:grid;grid-template-columns:40px minmax(0,1fr) auto;gap:28px;align-items:start;padding:30px 0}
.lesson-index-number{font-size:12px;color:#277e85;padding-top:7px}
.lesson-index-link h3{font-size:25px;line-height:1.35;margin-bottom:12px}
.lesson-index-link p{font-size:16px;line-height:1.8;color:var(--muted)}
.lesson-index-more{display:flex;align-items:center;gap:12px;white-space:nowrap;font-size:13px;font-weight:700;padding-top:5px;color:#277e85}
.lesson-index-more>span{font-size:23px;line-height:1}
.lesson-index-link:hover h3{color:#277e85}
.lesson-reading-width{max-width:1200px}
.lesson-detail-heading .page-heading-grid{grid-template-columns:1fr;gap:0;padding:38px 0 40px}
.lesson-detail-heading h1{font-size:48px;line-height:1.18;max-width:1050px}
.lessons-page .page-tabs a[aria-current=true]{border-color:var(--orange);color:var(--ink)}
.lesson-section-nav{display:flex;position:static;flex-direction:row;align-items:center;justify-content:flex-start;flex-wrap:wrap;gap:12px 28px;margin:0 0 40px;padding:0 0 18px;border:0;border-bottom:1px solid var(--line);background:none;box-shadow:none}
.lesson-section-nav a{font-size:14px;white-space:normal;padding:8px 0;line-height:1.5}
.lesson-content{width:100%;min-width:0}
.lesson-source-category{display:block;font-size:11px;font-weight:700;color:#277e85;line-height:1.6;margin:0 0 24px}
.lesson-content h2{font-size:28px;line-height:1.35;margin:44px 0 20px;scroll-margin-top:18px}
.lesson-content h3{font-size:21px;line-height:1.5;margin:24px 0 14px;color:var(--ink)}
.lesson-content p{font-size:17px;line-height:1.85;margin:0 0 20px;color:var(--muted)}
.lesson-source-list{padding-left:24px;margin:0 0 28px;color:var(--muted);font-size:17px;line-height:1.85}
.lesson-source-list li{padding-left:5px;margin:10px 0}
.lesson-source-list li::marker{color:#277e85}
.lesson-cycle-line{font-weight:700;color:#277e85!important;line-height:1.9!important}
.lesson-cycle-head{display:grid;grid-template-columns:190px minmax(0,1fr);gap:32px;margin-top:28px;padding:15px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:13px;line-height:1.5;font-weight:700;color:var(--ink)}
.lesson-cycle-list{list-style:none;counter-reset:lesson-cycle;margin:0 0 32px;padding:0}
.lesson-cycle-list>li{counter-increment:lesson-cycle;display:grid;grid-template-columns:190px minmax(0,1fr);gap:32px;border-bottom:1px solid var(--line);padding:24px 0}
.lesson-content .lesson-cycle-list h3{font-size:17px;margin:0;line-height:1.5}
.lesson-cycle-list h3:before{content:'0' counter(lesson-cycle);display:block;font-size:11px;color:#277e85;margin-bottom:8px}
.lesson-content .lesson-cycle-list p{font-size:16px;margin:0;line-height:1.8}
.lesson-source-note{border-left:3px solid var(--orange);padding-left:24px;margin:26px 0 32px}
.lesson-content .lesson-source-note h2:first-child{margin-top:0}
.lesson-content .lesson-source-note p:last-child{margin-bottom:0}
.lesson-content .textlink{display:inline-block;margin-top:14px;line-height:1.5;white-space:normal}
.lesson-pagination{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));position:static;gap:40px;margin:48px 0 0;padding:28px 0 0;border:0;border-top:1px solid var(--line);background:none;box-shadow:none}
.lesson-pagination a{min-width:0;white-space:normal;font-size:16px;padding:0;line-height:1.6}
.lesson-pagination span{display:block;font-size:12px;color:var(--muted);font-weight:400;margin-bottom:8px}
.lesson-pagination strong{font-size:16px}
.lesson-back-link{display:inline-block;margin-top:30px;font-size:14px;line-height:1.6}
@media(max-width:900px){
  .lesson-index-intro{align-items:flex-start;flex-direction:column;gap:24px}
  .lesson-index-link{grid-template-columns:30px minmax(0,1fr);gap:12px 20px}
  .lesson-index-more{grid-column:2;padding:0}
  .lesson-detail-heading h1{font-size:40px}
}
@media(max-width:700px){
  .lesson-cycle-list>li{grid-template-columns:minmax(0,1fr);gap:14px}
  .lesson-cycle-head{grid-template-columns:auto minmax(0,1fr);gap:18px}
}
@media(max-width:600px){
  .lesson-index-section,.lesson-read-section{padding-block:40px}
  .lesson-index-intro{margin-bottom:30px}
  .lesson-index-intro h2{font-size:27px}
  .lesson-index-intro p,.lesson-index-link p{font-size:15px}
  .lesson-index-list>li{scroll-margin-top:110px}
  .lesson-index-link{padding:26px 0;gap:12px 16px}
  .lesson-index-link h3{font-size:21px}
  .lesson-detail-heading .page-heading-grid{padding:28px 0}
  .lesson-detail-heading h1{font-size:34px;overflow-wrap:anywhere}
  .lesson-section-nav{gap:8px 20px;margin-bottom:30px;padding-bottom:14px}
  .lesson-section-nav a{font-size:13px}
  .lesson-content h2{font-size:24px;margin:36px 0 18px}
  .lesson-content h3{font-size:19px}
  .lesson-content p,.lesson-source-list{font-size:16px;line-height:1.8}
  .lesson-source-category{font-size:10px}
  .lesson-source-note{padding-left:18px}
  .lesson-cycle-list>li{padding:20px 0}
  .lesson-content .lesson-cycle-list p{font-size:16px}
  .lesson-pagination{gap:24px}
  .lesson-pagination strong{font-size:14px}
}