:root{--paper:#f7f5ef;--ink:#302f2b;--muted:#77756d;--line:#e2dfd5;--rust:#b95f43;--soft:#eee9df}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,'PingFang SC','Microsoft YaHei',sans-serif;font-size:16px;line-height:1.7}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid var(--rust);outline-offset:4px}.top{height:82px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 42px;background:var(--paper)}.brand{display:flex;align-items:center;gap:11px;font-family:Georgia,serif;font-size:29px}.burst{color:var(--rust);font-size:37px;line-height:1}.brand small{font-family:Arial,sans-serif;font-size:15px;border-left:1px solid #ccc6ba;padding-left:13px;margin-left:3px}.toplinks{display:flex;gap:28px;font-size:14px}.toplinks a:last-child{color:var(--rust)}.shell{display:grid;grid-template-columns:246px 1fr;max-width:1600px;margin:auto}.sidebar{padding:36px 23px;border-right:1px solid var(--line);min-height:calc(100vh - 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@media(min-width:1450px){.main{padding-left:8%;padding-right:8%}}@media(max-width:1050px){.shell{grid-template-columns:210px 1fr}.main{padding:30px 5%}h1{font-size:45px}.cards{grid-template-columns:repeat(2,1fr)}.welcome{grid-template-columns:1fr}.top{padding:0 26px}.sidebar{padding:30px 15px}}@media(max-width:700px){.top{height:70px;padding:0 20px}.brand{font-size:26px}.brand small{font-size:13px}.toplinks{display:none}.menu{display:block;background:none;border:1px solid var(--line);border-radius:5px;font-size:14px;padding:5px 10px}.shell{display:block}.sidebar{display:none;position:static;min-height:0;height:auto;border-bottom:1px solid var(--line)}.sidebar.open{display:block}.side-note{display:none}.main{padding:26px 22px}.breadcrumb{margin-bottom:23px}h1{font-size:40px;letter-spacing:-1px}.lead{font-size:16px}.cards{grid-template-columns:1fr}.card-top{margin-bottom:14px}.welcome{padding:21px;gap:20px}.intro-bottom{gap:13px;flex-wrap:wrap}.resource,footer{flex-direction:column;gap:10px}.lesson h1{font-size:36px}.section-head small{font-size:12px}}

.library-head{display:flex;justify-content:space-between;gap:25px;align-items:end;margin-bottom:28px}.library-head h1{font-size:44px;margin-bottom:12px}.library-head p{color:var(--muted);margin:0}.library-count{font:48px Georgia,serif;color:var(--rust);text-align:right;line-height:1}.library-count small{display:block;font:13px Arial,sans-serif;color:var(--muted);margin-top:10px}.library-tools{background:#eeeadf;border:1px solid var(--line);border-radius:9px;padding:20px;margin-bottom:25px}.search{width:100%;padding:13px 16px;border:1px solid #d4cbbd;border-radius:6px;font:16px Arial,sans-serif;background:#fbfaf6;color:var(--ink)}.filters{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}.filter{border:1px solid transparent;border-radius:20px;background:transparent;color:#71695d;padding:6px 15px;font-size:14px}.filter.selected{background:#3b3831;color:white}.library-results{display:flex;justify-content:space-between;align-items:center;margin-bottom:13px;font-size:14px;color:var(--muted)}.sort{border:1px solid var(--line);border-radius:5px;padding:7px 9px;font-size:14px;background:var(--paper);color:var(--ink)}.article-list{border-top:1px solid var(--line)}.article-row{display:grid;grid-template-columns:48px 1fr 110px;gap:20px;align-items:center;padding:25px 0;border-bottom:1px solid var(--line)}.article-row:hover h3{color:var(--rust)}.article-index{font:26px Georgia,serif;color:#b0a290}.article-row h3{font-size:21px;font-weight:500;margin:6px 0}.article-row p{font-size:14px;color:var(--muted);margin:0}.article-category{font-size:12px;color:var(--rust)}.article-info{font-size:13px;text-align:right;color:var(--muted)}.empty{padding:50px 15px;text-align:center;color:var(--muted)}.browse-link{color:var(--rust);font-size:14px}.reader-grid{display:grid;grid-template-columns:minmax(0,800px) 180px;gap:35px}.reader-grid .lesson{min-width:0}.toc{position:sticky;top:28px;align-self:start;border-left:1px solid var(--line);padding-left:18px;margin-top:40px;font-size:13px}.toc b{font-size:14px;font-weight:500}.toc a{display:block;color:var(--muted);margin:13px 0}.toc a:hover{color:var(--rust)}.lesson h2{scroll-margin-top:24px}.reading-meta{display:flex;flex-wrap:wrap;gap:12px;color:var(--muted);font-size:13px;margin-bottom:25px}.related{margin-top:34px;border-top:1px solid var(--line);padding-top:20px}.related h2{font-size:18px}.related a{display:block;color:var(--rust);font-size:15px;margin:10px 0}.library-pager{padding:22px 0;display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:13px}.pager-button{border:1px solid var(--line);background:transparent;border-radius:5px;padding:6px 13px;color:var(--ink);font-size:14px}.pager-button:disabled{color:#b1aca1;cursor:default}.pager-controls{display:flex;gap:10px;align-items:center}.home-library{padding:23px 26px;border:1px solid var(--line);border-radius:8px;margin-top:30px;display:flex;justify-content:space-between;align-items:center;gap:20px;background:#efe9df}.home-library h2{font-size:22px;font-weight:400;margin:0 0 5px}.home-library p{color:var(--muted);font-size:14px;margin:0}.home-library a{white-space:nowrap}.audience-note{font-size:13px;color:var(--muted);margin-top:16px}@media(max-width:1200px){.reader-grid{grid-template-columns:1fr}.toc{position:static;margin-top:0;grid-row:1;padding:15px 20px;background:#eee9df;border:0;border-radius:7px}.toc a{display:inline-block;margin:8px 16px 0 0}}@media(max-width:700px){.library-head h1{font-size:36px}.library-count{font-size:35px}.article-row{grid-template-columns:30px 1fr;gap:12px;padding:22px 0}.article-info{grid-column:2;text-align:left}.home-library{align-items:start;flex-direction:column}.library-pager{gap:10px;flex-wrap:wrap}.reader-grid{gap:15px}}

/* Journal layout */
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@media(min-width:1450px){.main{padding-left:0;padding-right:0}}@media(max-width:1280px){.shell{margin:0 5%}.main{padding:18px 0 40px}}@media(max-width:950px){.editorial-intro{gap:30px}.editorial-intro h1{font-size:56px}.feature-quote{font-size:27px}.feature-story{padding:25px;min-height:310px}.journal-grid{gap:30px}.lead-story{padding-right:25px}.lead-story h3{font-size:29px}.topic-strip{gap:20px;flex-wrap:wrap}.reader-grid{gap:30px;grid-template-columns:minmax(0,1fr) 160px}.toc{position:sticky;grid-row:auto;background:none;padding:0 0 0 15px;border-left:1px solid var(--line)}.toc a{display:block;margin:13px 0}}@media(max-width:700px){.top{height:78px;padding:0 5%}.brand{font-size:27px}.menu{display:block}.mobile-nav.open{display:block;margin:0 5%;padding:12px;background:#eee8dc}.editorial-intro{grid-template-columns:1fr;padding:35px 0;gap:30px}.editorial-intro h1{font-size:53px;letter-spacing:-2px}.feature-story{min-height:290px}.feature-quote{font-size:29px}.edition{font-size:10px;letter-spacing:1px}.topic-strip{gap:14px;padding:17px 0}.topic-strip>span{width:100%}.journal-grid{grid-template-columns:1fr}.lead-story{border-right:0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:75px 1fr;gap:18px;padding:0 0 25px}.lead-story .number{font-size:60px}.lead-story h3{font-size:29px;margin-top:10px}.journal-list .article-row:first-child{border-top:0}.closing-note{flex-wrap:wrap;padding:23px;gap:14px}.closing-note .burst{font-size:35px}.closing-note>div{flex:1}.closing-note .back{margin-left:49px}.article-list{grid-template-columns:1fr}.library-head h1{font-size:38px}.reader-grid{grid-template-columns:1fr;gap:20px}.reader-grid .toc{grid-row:1;position:static;margin-top:0;padding:16px;border:1px solid var(--line)}.toc a{display:inline-block;margin:8px 13px 0 0}.lesson h1{font-size:38px}.lesson .lead{font-size:18px}.section-head h2{font-size:27px}.main{padding-top:10px}.breadcrumb{font-size:12px}}


/* Reference-inspired task guide */
:root{--paper:#f5f4ef;--ink:#292b27;--muted:#6b6a62;--line:#dcd9d0;--rust:#b85e40}body{background:var(--paper);font-size:16px;line-height:1.8}[hidden]{display:none!important}.top{position:sticky;top:0;z-index:10;background:rgba(245,244,239,.97);border-bottom:1px solid var(--line);height:92px}.brand small{font-size:13px}.toplinks{gap:25px}.toplinks a{padding:10px 0;font-size:14px}.toplinks a:hover{color:var(--rust)}.main{padding-top:0}.edition{border-top:0;font-size:12px;letter-spacing:.7px;padding:19px 0}.reference-hero{display:grid;grid-template-columns:1.15fr 1fr;gap:72px;align-items:center;padding:60px 0 66px}.reference-hero h1{font-family:Arial,'PingFang SC',sans-serif;font-weight:700;font-size:62px;line-height:1.27;letter-spacing:-2.5px;margin:20px 0 24px}.reference-hero .eyebrow{color:var(--muted)}.reference-hero .lead{font-size:17px;line-height:1.9}.primary{background:var(--rust);font-weight:600;padding:12px 20px;border-radius:4px;display:inline-block}.hero-actions{display:flex;gap:24px;align-items:center}.hero-disclosure{font-size:12px;color:var(--muted);margin:14px 0 0}.workbench{background:#302e29;color:#f6f3e9;padding:26px 30px;border-radius:9px;box-shadow:10px 10px 0 #e4ded1}.bench-top{display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid #5b544b;padding-bottom:19px;font-size:13px}.bench-top span:last-child{font:12px monospace;color:#c9bbac}.example-tabs{display:flex;gap:7px;margin-top:20px}.example-tabs button{background:none;color:#ddd2c5;border:1px solid #756857;border-radius:4px;padding:5px 15px;font-size:13px}.example-tabs button[aria-pressed=true]{background:#dfb69a;color:#302e29;border-color:#dfb69a}.bench-label{font-size:12px;color:#c2b5a7;margin:23px 0 7px}.before-prompt{font-size:20px;color:#e1d8c9;margin:0}.bench-divider{font-size:12px;color:#baa996;border-bottom:1px solid #5b544b;padding:13px 0 10px}.bench-label.accent{color:#e2bb9e;margin-top:17px}#hero-prompt{font-size:16px;line-height:1.95;min-height:124px;margin:0 0 17px}.prompt-tags{display:flex;gap:8px}.prompt-tags span{font-size:12px;border:1px solid #75634f;padding:1px 9px;color:#e2bb9e;border-radius:3px}.bench-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid #5b544b;margin-top:23px;padding-top:15px;font-size:12px;color:#c2b5a7}.bench-bottom button{background:none;color:#e2bb9e;border:0;font-size:13px;padding:8px}.intent-strip{display:grid;grid-template-columns:.8fr 1fr 1fr 1fr;border-block:1px solid var(--line);padding:23px 0;font-size:14px}.intent-strip>span{font-size:13px;color:var(--muted)}.intent-strip a{padding:0 22px;border-left:1px solid var(--line)}.intent-strip a:hover{color:var(--rust)}.reference-section{padding:62px 0;border-bottom:1px solid var(--line)}.section-head{margin:0 0 32px}.section-head h2,.reference-faq h2,.practice-banner h2{font-family:Arial,'PingFang 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