/* Independent learning surface. Every rule is scoped; no commercial CSS/assets. */
.learning-module{--learning-bg:var(--bg,#fff);--learning-ink:var(--tx,var(--ink,#0d0d0b));--learning-muted:var(--tx-2,var(--muted,#777872));--learning-line:color-mix(in srgb,var(--learning-ink) 20%,transparent);--learning-soft:var(--bg-1,#f3f3f2);background:var(--learning-bg);color:var(--learning-ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:14px;line-height:1.65;min-height:70vh;width:100%;overflow-wrap:anywhere}
.learning-module,.learning-module *{box-sizing:border-box}
.learning-module :where(h1,h2,h3,p,blockquote,ol){margin:0}
.learning-module a{color:inherit;text-decoration:none;cursor:pointer}
.learning-module button,.learning-module input,.learning-module select{font:inherit;color:inherit}
.learning-module button,.learning-module select,.learning-module summary{cursor:pointer}
.learning-module button{min-width:0;min-height:0}
.learning-module a:focus-visible,.learning-module button:focus-visible,.learning-module select:focus-visible,.learning-module summary:focus-visible{outline:2px solid currentColor;outline-offset:4px}
.learning-module .learning-sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.learning-module .learning-hero{position:relative;text-align:center;padding:12px 24px 48px;background:radial-gradient(ellipse at 84% 8%,rgba(92,94,87,.17),transparent 58%),radial-gradient(ellipse at 8% 24%,rgba(149,150,144,.12),transparent 62%),linear-gradient(180deg,rgba(190,190,183,.09),transparent 96%)}
.learning-module .learning-eyebrow{font-size:13px;font-weight:400;letter-spacing:.36em;color:var(--learning-muted);line-height:1.65}
.learning-module .learning-hero .learning-eyebrow{color:var(--learning-ink)}
.learning-module .learning-hero h1{font-size:clamp(28px,4vw,42px);line-height:1.3;font-weight:700;letter-spacing:.15em;margin:16px 0 12px}
.learning-module .learning-lead{max-width:650px;margin:0 auto;font-size:14px;line-height:1.7;letter-spacing:.08em;color:var(--learning-muted)}
.learning-module .learning-lead strong{color:var(--learning-ink)}
.learning-module .learning-hero-stats{font-size:13px;line-height:2.2;letter-spacing:.04em;margin:22px 0;color:var(--learning-muted)}
.learning-module .learning-hero-stats strong{font-size:14px;font-weight:600;color:var(--learning-ink)}
.learning-module .learning-hero-stats span{margin:0 18px}
.learning-module .learning-search{max-width:460px;margin:0 auto;position:relative;text-align:left}
.learning-module .learning-search label{display:block}
.learning-module .learning-search input{display:block;width:100%;padding:11px 67px 11px 36px;min-height:48px;border:1px solid var(--learning-line);border-radius:10px;outline:none;background:var(--learning-bg);font-size:14px;letter-spacing:.05em;line-height:24px;box-shadow:0 1px 3px #00000004;appearance:none}
.learning-module .learning-search input::-webkit-search-cancel-button{display:none}
.learning-module .learning-search input:focus{border-color:var(--learning-ink);box-shadow:0 0 0 2px #8882}
.learning-module .learning-search input::placeholder{color:var(--learning-muted)}
.learning-module .learning-search-icon{position:absolute;left:14px;top:12px;color:var(--learning-muted)}
.learning-module .learning-search button{position:absolute;right:10px;top:8px;padding:4px 8px;border:0;border-radius:6px;line-height:24px;background:transparent;color:var(--learning-muted);font-size:13px}
.learning-module .learning-search button:hover{background:var(--learning-soft);color:var(--learning-ink)}
.learning-module .learning-catalog{max-width:1024px;margin:0 auto;padding:0 24px 80px}
.learning-module .learning-filter-row{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:4px 0 18px;font-size:12px;color:var(--learning-muted)}
.learning-module select{border:1px solid var(--learning-line);border-radius:6px;background:var(--learning-bg);padding:5px 20px 5px 8px;font-size:12px;max-width:190px}
.learning-module .learning-text-link{letter-spacing:.05em;white-space:nowrap}
.learning-module .learning-text-link:hover{text-decoration:underline;text-underline-offset:4px}
.learning-module .learning-result-count{text-align:center;font-size:13px;line-height:22px;color:var(--learning-muted);letter-spacing:.3em;margin:0 0 24px}
.learning-module .learning-star-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:12px}
.learning-module .learning-star-tile{display:block;text-align:center;padding:14px 10px;border:1px solid var(--learning-line);border-radius:10px;font-size:18px;line-height:30px;font-weight:650;letter-spacing:.15em;background:var(--learning-bg);box-shadow:0 2px 3px #00000006;transition:border-color .15s,background .15s}
.learning-module .learning-star-tile:hover{border-color:var(--learning-ink);background:var(--learning-soft)}
.learning-module .learning-star-list{margin-top:56px;display:grid;gap:16px}
.learning-module .learning-star-card{border:1px solid var(--learning-line);border-radius:12px;padding:18px 22px;background:var(--learning-bg)}
.learning-module .learning-card-title{display:flex;align-items:baseline;gap:12px;margin-bottom:8px}
.learning-module .learning-card-title h2{font-size:20px;font-weight:650;letter-spacing:.1em}
.learning-module .learning-card-title span{font-size:11px;color:var(--learning-muted);letter-spacing:.15em}
.learning-module .learning-star-card>p{font-size:13px;color:var(--learning-muted);line-height:1.7;margin-bottom:12px}
.learning-module .learning-pills{display:flex;flex-wrap:wrap;gap:8px}
.learning-module .learning-pill{display:inline-block;padding:5px 10px;background:var(--learning-soft);border:1px solid var(--learning-line);border-radius:999px;font-size:13px;line-height:21px;transition:background .15s}
.learning-module .learning-pill:hover{background:var(--learning-bg);border-color:var(--learning-ink)}
.learning-module .learning-reading{max-width:768px;margin:0 auto;padding:72px 24px 64px}
.learning-module .learning-breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:9px;font-size:12px;color:var(--learning-muted);letter-spacing:.07em;margin-bottom:18px}
.learning-module .learning-breadcrumb a:hover{color:var(--learning-ink);text-decoration:underline}
.learning-module .learning-article-head{margin-bottom:36px}
.learning-module .learning-article-head .learning-eyebrow{letter-spacing:.2em}
.learning-module .learning-reading h1{font-size:clamp(28px,5vw,44px);font-weight:700;line-height:1.25;letter-spacing:.1em;margin:10px 0 14px}
.learning-module .learning-article-head>p:last-child{font-size:13px;color:var(--learning-muted);line-height:1.8}
.learning-module .learning-section{margin-top:32px}
.learning-module .learning-section>h2{position:relative;font-size:13px;font-weight:600;letter-spacing:.15em;padding-left:12px;margin-bottom:12px}
.learning-module .learning-section>h2:before{position:absolute;content:"";left:0;top:5px;width:3px;height:14px;border-radius:2px;background:currentColor}
.learning-module .learning-panel{border:1px solid var(--learning-line);border-radius:10px;padding:22px;font-size:15px;line-height:2;letter-spacing:.03em}
.learning-module .learning-panel p+p{margin-top:14px}
.learning-module .learning-keynote{background:linear-gradient(120deg,var(--learning-soft),var(--learning-bg))}
.learning-module .learning-keynote>p:first-child{font-size:17px;font-weight:600}
.learning-module .learning-note{font-size:12px!important;line-height:1.8!important;letter-spacing:.02em!important;color:var(--learning-muted)!important}
.learning-module .learning-reference{padding:20px 22px;border:1px solid var(--learning-line);border-radius:10px;margin:0 0 12px;font-size:15px;line-height:2}
.learning-module .learning-reference footer{font-size:12px;line-height:1.8;color:var(--learning-muted);margin-top:12px}
.learning-module .learning-reference footer a{text-decoration:underline;text-underline-offset:4px}
.learning-module .learning-reference small{display:block;font-size:11px;margin-top:4px}
.learning-module .learning-source-note{font-size:12px;color:var(--learning-muted);line-height:1.9;border-top:1px solid var(--learning-line);margin-top:32px;padding-top:18px}
.learning-module .learning-source-note a{text-decoration:underline;text-underline-offset:3px}
.learning-module .learning-books{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.learning-module .learning-book{display:flex;flex-direction:column;padding:26px 22px;border:1px solid var(--learning-line);border-radius:12px;background:var(--learning-bg);transition:transform .15s,border-color .15s}
.learning-module .learning-book:hover{border-color:var(--learning-ink);transform:translateY(-3px)}
.learning-module .learning-book-number{font-size:12px;letter-spacing:.2em;color:var(--learning-muted);margin-bottom:24px}
.learning-module .learning-book h2{font-size:23px;line-height:1.5;font-weight:650;letter-spacing:.08em;margin-bottom:10px}
.learning-module .learning-book p{font-size:13px;line-height:1.9;color:var(--learning-muted);margin-bottom:16px}
.learning-module .learning-book .learning-book-meta{font-size:11px;letter-spacing:.05em;min-height:36px}
.learning-module .learning-book small{font-size:11px;color:var(--learning-muted);margin:auto 0 20px}
.learning-module .learning-book-open{font-size:12px;letter-spacing:.1em;border-top:1px solid var(--learning-line);padding-top:16px;font-weight:500}
.learning-module .learning-book-head{text-align:center;margin:30px 0 32px}
.learning-module .learning-book-head h1{font-size:clamp(25px,3.5vw,36px);margin-bottom:12px}
.learning-module .learning-book-head>p{color:var(--learning-muted);font-size:13px;margin-top:8px;line-height:1.8}
.learning-module .learning-directory{border:1px solid var(--learning-line);border-radius:12px;overflow:hidden}
.learning-module .learning-chapter-link{display:flex;align-items:center;gap:18px;padding:18px 22px;border-bottom:1px solid var(--learning-line)}
.learning-module .learning-chapter-link:last-child{border-bottom:0}
.learning-module .learning-chapter-link:hover{background:var(--learning-soft)}
.learning-module .learning-chapter-link>span{font-size:12px;color:var(--learning-muted)}
.learning-module .learning-chapter-link>span:last-child{margin-left:auto}
.learning-module .learning-chapter-link h2{font-size:16px;font-weight:500;letter-spacing:.04em}
.learning-module .learning-chapter-link p{font-size:12px;color:var(--learning-muted);margin-top:4px}
.learning-module .learning-directory~.learning-search{margin-top:28px}
.learning-module .learning-reader-tools{display:flex;align-items:flex-start;justify-content:space-between;font-size:12px;color:var(--learning-muted);gap:20px;margin-bottom:14px}
.learning-module .learning-reader-tools details{max-width:70%}
.learning-module .learning-reader-tools summary{padding:5px 0}
.learning-module .learning-reader-tools ol{padding:12px 10px 12px 22px;line-height:2.4}
.learning-module .learning-reader-tools a[aria-current="page"]{font-weight:700;color:var(--learning-ink)}
.learning-module .learning-reader-panel{border:1px solid var(--learning-line);border-radius:14px;padding:28px;background:var(--learning-bg)}
.learning-module .learning-paragraph{display:flex;align-items:baseline;gap:12px;position:relative;padding-bottom:20px;margin-bottom:20px;border-bottom:1px dashed var(--learning-line);scroll-margin-top:100px}
.learning-module .learning-paragraph:last-child{padding-bottom:0;margin-bottom:0;border-bottom:0}
.learning-module .learning-paragraph p{flex:1;min-width:0;font-size:var(--learning-reader-size,16px);line-height:2.15;letter-spacing:.04em}
.learning-module .learning-paragraph-number{font-size:11px;color:var(--learning-muted);min-width:22px}
.learning-module .learning-paragraph-anchor{position:absolute;right:-18px;top:4px;font-size:12px;color:var(--learning-muted);opacity:.5}
.learning-module .learning-paragraph:target{background:var(--learning-soft);border-radius:6px;outline:6px solid var(--learning-soft)}
.learning-module mark{background:#eae4cf;color:#242117;border-radius:2px;padding:1px 2px}
.learning-module .learning-chapter-nav{display:flex;justify-content:space-between;align-items:stretch;gap:16px;margin-top:24px}
.learning-module .learning-chapter-nav>a,.learning-module .learning-nav-disabled{flex:1;min-width:0;border:1px solid var(--learning-line);border-radius:10px;padding:14px 18px}
.learning-module .learning-chapter-nav>a:hover{background:var(--learning-soft)}
.learning-module .learning-chapter-nav small{display:block;font-size:11px;letter-spacing:.12em;color:var(--learning-muted);margin-bottom:4px}
.learning-module .learning-chapter-nav strong{display:block;font-size:13px;font-weight:500}
.learning-module .learning-next{text-align:right}
.learning-module .learning-nav-disabled{font-size:12px;color:var(--learning-muted);border-color:transparent}
.learning-module .learning-search-scope{display:flex;gap:12px;align-items:center;font-size:12px;color:var(--learning-muted);margin:18px 0}
.learning-module .learning-search-count{font-size:13px;color:var(--learning-muted);margin:26px 0 18px}
.learning-module .learning-search-hit{display:block;border:1px solid var(--learning-line);border-radius:10px;padding:20px 22px;margin:0 0 14px}
.learning-module .learning-search-hit:hover{border-color:var(--learning-ink)}
.learning-module .learning-search-hit>span{font-size:12px;color:var(--learning-muted)}
.learning-module .learning-search-hit>p{font-size:15px;line-height:1.9;margin:10px 0}
.learning-module .learning-search-hit small{font-size:11px;color:var(--learning-muted)}
.learning-module .learning-empty{padding:42px 20px;text-align:center;color:var(--learning-muted)}
.learning-module .learning-empty h2{font-size:17px;font-weight:500;color:var(--learning-ink);margin-bottom:10px}
.learning-module .learning-empty p{font-size:13px;line-height:1.9;max-width:450px;margin:0 auto 20px}
.learning-module .learning-button{display:inline-block;border:1px solid var(--learning-line);border-radius:8px;padding:10px 16px;background:var(--learning-bg);font-size:12px}
.learning-module .learning-button:hover{background:var(--learning-soft)}
.learning-module .learning-pagination{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:26px;font-size:12px;color:var(--learning-muted)}
.learning-module .learning-footer{max-width:1024px;margin:0 auto;padding:30px 24px 40px;text-align:center;color:var(--learning-muted);font-size:11px;letter-spacing:.04em;line-height:2}
.learning-module .learning-footer details{margin-top:14px;max-width:720px;display:block;margin-left:auto;margin-right:auto}
.learning-module .learning-footer details[open]{text-align:left}
.learning-module .learning-footer details>p{margin:14px 0}
.learning-module .learning-footer details a{text-decoration:underline}
.learning-module .learning-footer pre{font:10px/1.7 ui-monospace,monospace;white-space:pre-wrap;overflow-wrap:anywhere;padding:16px;background:var(--learning-soft);margin-top:12px;border-radius:8px}
@media (max-width:1023px){.learning-module .learning-star-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media (max-width:639px){
.learning-module .learning-hero{padding-top:22px;padding-bottom:80px}
.learning-module .learning-hero h1{font-size:28px;margin:16px 0 14px;letter-spacing:.12em}
.learning-module .learning-hero .learning-eyebrow{font-size:12px;letter-spacing:.35em}
.learning-module .learning-hero-stats{margin:24px 0;font-size:12px;line-height:2.2}
.learning-module .learning-hero-stats strong{font-size:13px}
.learning-module .learning-hero-stats span{margin:0 9px}
.learning-module .learning-hero .learning-lead{font-size:13px;line-height:1.9;letter-spacing:.05em}
.learning-module .learning-search input{font-size:13px}
.learning-module .learning-filter-row{gap:10px;flex-wrap:wrap;margin-bottom:22px;font-size:11px}
.learning-module .learning-filter-row label{display:flex;gap:5px;align-items:center}
.learning-module .learning-filter-row select{max-width:122px}
.learning-module .learning-result-count{margin-bottom:24px}
.learning-module .learning-star-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.learning-module .learning-star-tile{padding:14px 8px;font-size:18px}
.learning-module .learning-star-list{margin-top:48px}
.learning-module .learning-star-card{padding:18px}
.learning-module .learning-card-title{gap:9px;flex-wrap:wrap}
.learning-module .learning-card-title span{font-size:10px;letter-spacing:.1em}
.learning-module .learning-pill{font-size:11px;padding:5px 9px}
.learning-module .learning-reading{padding:34px 24px 42px}
.learning-module .learning-reading h1{font-size:29px;line-height:1.4;letter-spacing:.08em}
.learning-module .learning-panel{padding:18px;font-size:14px;line-height:1.95}
.learning-module .learning-keynote>p:first-child{font-size:15px}
.learning-module .learning-reference{padding:18px;font-size:14px}
.learning-module .learning-books{grid-template-columns:minmax(0,1fr);gap:16px}
.learning-module .learning-book{padding:24px}
.learning-module .learning-book-number{margin-bottom:16px}
.learning-module .learning-book .learning-book-meta{min-height:0}
.learning-module .learning-book h2{font-size:25px}
.learning-module .learning-book-head h1{font-size:25px}
.learning-module .learning-reader-panel{padding:22px 18px}
.learning-module .learning-paragraph{gap:8px}
.learning-module .learning-paragraph-number{min-width:17px}
.learning-module .learning-paragraph p{line-height:2.05;letter-spacing:.025em}
.learning-module .learning-paragraph-anchor{right:-13px;font-size:11px}
.learning-module .learning-chapter-nav{gap:10px}
.learning-module .learning-chapter-nav>a,.learning-module .learning-nav-disabled{padding:12px}
.learning-module .learning-chapter-link{gap:12px;padding:17px 16px}
.learning-module .learning-chapter-link h2{font-size:15px}
.learning-module .learning-search-hit{padding:18px}
.learning-module .learning-search-hit>p{font-size:14px}
.learning-module .learning-footer{padding-bottom:30px}
}
@media (prefers-reduced-motion:reduce){.learning-module *{transition:none!important;scroll-behavior:auto!important}}