/* One authorized catalogue layout for every entry into “我的课件”. */
html[data-theme] body main.library-page{padding-top:calc(var(--header-height,100px) + 24px)}
html[data-theme] body .purchase-library>.library-header{margin:0 0 28px;align-items:center}
html[data-theme] body .purchase-library>.library-header h1{margin:0;font-size:40px}
.library-browser{display:grid;grid-template-columns:252px minmax(0,1fr);gap:28px;align-items:start}
.library-directory{position:sticky;top:calc(var(--header-height,100px) + 18px);min-width:0;border:1px solid var(--ui-line);border-radius:16px;background:var(--ui-surface)}
.library-directory-toggle{display:none}
.library-directory-body{padding:18px 13px;max-height:calc(100dvh - var(--header-height,100px) - 46px);overflow:auto;scrollbar-width:thin}
.library-directory-body>h2{margin:0 9px 14px;font-size:19px;font-weight:500}
.library-unit-all{display:block;width:100%;min-height:44px;padding:9px 10px;text-align:left;font-size:15px;border-radius:7px;margin-bottom:14px}
.library-volume+ .library-volume{margin-top:10px}
.library-volume>summary{cursor:pointer;padding:12px 9px;font-size:16px;font-weight:500;line-height:1.55;color:var(--ui-text)}
.library-unit-list{display:grid;gap:4px;padding:0 0 9px}
.library-unit{display:flex;align-items:center;justify-content:space-between;width:100%;gap:10px;padding:11px 10px;border-radius:7px;text-align:left;min-height:46px;font-size:16px;line-height:1.55;color:var(--ui-muted)}
.library-unit>small{flex-shrink:0;font-size:12px;color:var(--ui-muted)}
.library-unit:hover,.library-unit-all:hover{background:var(--ui-raised);color:var(--ui-text)}
.library-unit.selected,.library-unit-all.selected{color:var(--ui-text);background:var(--ui-raised);box-shadow:inset 2px 0 var(--ui-muted)}
.library-content{min-width:0;scroll-margin-top:calc(var(--header-height,100px) + 20px)}
.library-result-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:20px;min-height:34px}
.library-result-heading>h2{font-size:22px;font-weight:500;margin:0;line-height:1.6}
.library-result-heading>span{font-size:14px;white-space:nowrap;color:var(--ui-muted)}
html[data-theme] body .library-content>.library-bundle{margin:0 0 28px;padding:22px;border:1px solid var(--ui-line);border-radius:16px;background:var(--ui-surface)}
html[data-theme] body .library-content .library-bundle>header{padding-bottom:18px;margin-bottom:22px;gap:18px;align-items:flex-start}
html[data-theme] body .library-content .library-bundle>header .eyebrow{margin:0 0 8px;font-size:12px}
html[data-theme] body .library-content .library-bundle>header h2{font-size:24px;line-height:1.45;margin-bottom:7px}
.library-content .library-bundle>header>.text-button{font-size:14px;white-space:nowrap}
.library-course-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 20px}
.library-course-card{min-width:0;overflow:hidden;border:1px solid var(--ui-line);border-radius:12px;background:var(--ui-raised);display:flex;flex-direction:column}
.library-card-cover{display:block;position:relative;width:100%;aspect-ratio:1.7;overflow:hidden;background:#101820}
.library-card-cover>img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.library-card-cover>span{position:absolute;right:12px;bottom:12px;display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:#070b10b3;color:#fff;font-size:19px;border:1px solid #ffffff30}
.library-card-cover:hover>img{transform:scale(1.025)}
.library-card-body{display:flex;flex:1;flex-direction:column;padding:19px 18px 17px}
html[data-theme] body .library-card-body h3{font-size:20px;font-weight:500;line-height:1.6;margin:0;overflow-wrap:anywhere}
.library-card-body h3 a:hover,.library-card-actions>.text-button:hover{opacity:.8}
.library-card-body>.subtle{margin:9px 0 18px;font-size:14px;line-height:1.7}
.library-card-actions{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:9px 12px;margin-top:auto}
html[data-theme] body .library-card-actions>.button{min-height:42px;font-size:14px;padding:9px 14px}
.library-card-actions>.text-button{font-size:14px;padding:8px 0}
html[data-theme] body .library-content>.library-other{margin:0 0 30px}
.library-other>.subtle{margin:0 0 22px}
.purchase-library>.library-orders{margin-top:35px}
@media(min-width:1450px){.library-course-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(min-width:901px) and (max-width:1100px){.library-browser{grid-template-columns:222px minmax(0,1fr);gap:22px}html[data-theme] body .library-content>.library-bundle{padding:18px}.library-card-body{padding:16px 14px}.library-card-actions{align-items:stretch;flex-direction:column}.library-card-actions>.text-button{text-align:center}}
@media(max-width:900px){
 html[data-theme] body main.library-page{padding-top:calc(var(--header-height,100px) + 20px)}
 .library-browser{display:block}.library-directory{position:static;margin-bottom:22px}
 .library-directory-toggle{display:flex;justify-content:space-between;align-items:center;min-height:54px;padding:14px 18px;cursor:pointer;font-size:17px;list-style:none}
 .library-directory-toggle::-webkit-details-marker{display:none}
 .library-directory-body{max-height:55dvh;border-top:1px solid var(--ui-line);padding:14px}
 .library-directory-body>h2{display:none}.library-unit-all{margin-bottom:8px}
 html[data-theme] body .purchase-library>.library-header h1{font-size:34px}
}
@media(max-width:600px){
 html[data-theme] body .purchase-library>.library-header{align-items:flex-start;gap:18px;margin-bottom:24px}
 html[data-theme] body .purchase-library>.library-header h1{font-size:30px}
 .purchase-library>.library-header>.button{font-size:13px;padding:8px 11px;white-space:nowrap}
 .library-result-heading>h2{font-size:21px}.library-result-heading>span{font-size:13px}
 html[data-theme] body .library-content>.library-bundle{padding:18px 15px}
 html[data-theme] body .library-content .library-bundle>header{flex-direction:column;gap:8px;margin-bottom:18px}
 html[data-theme] body .library-content .library-bundle>header h2{font-size:23px}
 .library-course-grid{grid-template-columns:minmax(0,1fr);gap:20px}
 .library-card-body{padding:18px}.library-card-actions{gap:12px}
}
@media(prefers-reduced-motion:reduce){.library-card-cover>img{transition:none}}