:root{--paper:#fff;--wash:#f7faff;--ink:#11223d;--body:#354963;--muted:#526680;--blue:#1261ee;--blue-dark:#084dbf;--sky:#eff6ff;--line:#dce6f2;--header:80px;--radius:16px;color-scheme:light;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:105px}body{background:var(--paper);color:var(--body);-webkit-font-smoothing:antialiased;margin:0}h1,h2,h3,h4,strong{color:var(--ink)}h1,h2,h3,h4,p,figure{margin:0}button,input,select{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer;color:inherit}a{color:var(--blue);text-decoration:none}a:hover{text-underline-offset:4px;text-decoration:underline}img{max-width:100%;display:block}[hidden]{display:none!important}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline-offset:4px;outline:3px solid #7af}.sr-only{clip:rect(0,0,0,0);width:1px;height:1px;position:absolute;overflow:hidden}.skip{background:var(--blue);color:#fff;z-index:90;padding:14px;position:fixed;top:-80px;left:20px}.skip:focus{top:10px}.shell{width:min(1280px,100%);margin:auto;padding:0 28px}.icon{fill:none;stroke:currentColor;stroke-width:1.7px;stroke-linecap:round;stroke-linejoin:round;vertical-align:middle;flex:none;width:20px;height:20px}.site-header{height:var(--header);z-index:40;border-bottom:1px solid var(--line);background:#fffffff5;position:sticky;top:0}.header-inner{align-items:center;gap:30px;height:100%;display:flex}.brand{color:var(--ink);flex:none;align-items:center;gap:11px;display:flex}.brand:hover{text-decoration:none}.brand img{width:44px;height:44px}.brand-name{letter-spacing:-1px;font-size:27px;font-weight:760;line-height:1.1;display:block}.brand-name em{color:var(--blue);font-style:normal}.brand small{color:var(--muted);margin-top:5px;font-size:11px;display:block}.topnav{align-items:center;gap:29px;margin-left:auto;display:flex}.topnav a{color:var(--body);white-space:nowrap;font-size:14px;font-weight:550;position:relative}.topnav a[aria-current=page]{color:var(--blue)}.topnav a[aria-current=page]:after{content:"";background:var(--blue);border-radius:5px;height:3px;position:absolute;bottom:-30px;left:0;right:0}.header-actions{align-items:center;gap:12px;display:flex}.language{color:var(--muted);font-size:12px}.icon-btn{border:1px solid var(--line);background:#fff;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;padding:0;display:inline-flex}.icon-btn:hover{background:var(--sky);color:var(--blue)}.btn{border:1px solid var(--line);min-height:44px;color:var(--ink);background:#fff;border-radius:99px;justify-content:center;align-items:center;gap:8px;padding:11px 20px;font-size:14px;font-weight:650;line-height:1.5;display:inline-flex}.btn:hover{background:var(--sky);text-decoration:none}.btn.primary{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 4px 14px #1261ee18}.btn.primary:hover{background:var(--blue-dark)}.menu-toggle{display:none}.progress{background:var(--blue);width:0;height:2px;position:absolute;bottom:-1px;left:0}.eyebrow{color:var(--blue);letter-spacing:.15em;text-transform:uppercase;font-size:11px;font-weight:650;line-height:1.7}.hero{grid-template-columns:minmax(0,1fr) 298px;align-items:center;gap:70px;padding-top:54px;padding-bottom:42px;display:grid}.hero h1{letter-spacing:-1.7px;margin:19px 0;font-size:52px;font-weight:760;line-height:1.28}.hero h1 em{color:var(--blue);font-family:inherit;font-style:normal}.hero-deck{max-width:685px;color:var(--muted);font-size:16px;line-height:1.9}.search-form{background:#fff;border:1px solid #c8d8ef;border-radius:12px;align-items:center;gap:14px;max-width:730px;min-height:66px;margin-top:28px;padding:7px 8px 7px 20px;display:flex;box-shadow:0 8px 28px #274f7d06}.search-form>.icon{color:var(--blue);width:24px;height:24px}.search-form input{width:100%;min-width:0;color:var(--ink);background:0 0;border:0;font-size:16px;outline:0!important}.search-form:focus-within{border-color:var(--blue);box-shadow:0 0 0 3px #1261ee12}.search-form button{background:var(--blue);color:#fff;border:0;border-radius:8px;min-width:49px;height:49px}.quick-searches{flex-wrap:wrap;align-items:center;gap:8px;margin-top:13px;display:flex}.quick-searches span{color:var(--muted);margin-right:3px;font-size:11px}.quick-searches button{border:1px solid var(--line);color:#436084;background:#fff;border-radius:6px;padding:7px 10px;font-size:12px}.quick-searches button:hover{color:var(--blue);background:var(--sky);border-color:#a8c6f4}.hero-note{background:#f4f8ff;border:1px solid #dbe8fa;border-radius:17px;padding:24px}.hero-note h2{letter-spacing:-.4px;margin:10px 0 12px;font-size:23px;line-height:1.5}.hero-note p{color:#4b617d;margin:12px 0;font-size:13px;line-height:1.8}.hero-note .note-row{color:#45607f;border-top:1px solid #dee8f7;align-items:center;gap:9px;padding:10px 0;font-size:12px;line-height:1.6;display:flex}.hero-note .note-row .icon{width:17px;height:17px;color:var(--blue)}.hero-note>a{font-size:13px;font-weight:650}.section-heading{justify-content:space-between;align-items:end;gap:24px;margin:34px 0 22px;display:flex}.section-heading h2{letter-spacing:-.7px;font-size:27px;line-height:1.4}.section-heading p{color:var(--muted);margin-top:9px;font-size:14px;line-height:1.8}.section-heading>a{flex:none;font-size:13px}.library{padding-bottom:62px}.filterbar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:15px;margin-bottom:24px;padding:20px 0;display:flex}.filters{flex-wrap:wrap;align-items:center;gap:5px;display:flex}.filters button{color:#48617f;background:0 0;border:0;border-radius:7px;padding:8px 13px;font-size:13px}.filters button[aria-pressed=true]{color:var(--blue);background:#edf4ff;font-weight:650}.filters button:hover{background:var(--sky)}.filter-tools{color:var(--muted);align-items:center;gap:10px;font-size:12px;display:flex}.filter-tools select{color:#526b89;background:0 0;border:0;max-width:128px;padding:7px;font-size:12px}.view-toggle{border-left:1px solid var(--line);gap:3px;padding-left:10px;display:flex}.view-toggle button{color:#617896;background:0 0;border:0;border-radius:5px;padding:5px}.countline{color:var(--muted);justify-content:space-between;align-items:center;margin:0 0 18px;font-size:12px;display:flex}.grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;display:grid}.guide-card{border:1px solid var(--line);color:var(--body);background:#fff;border-radius:14px;flex-direction:column;min-width:0;padding:23px;transition:transform .2s,border-color .2s,box-shadow .2s;display:flex;position:relative}.guide-card:hover{border-color:#a8c7f9;text-decoration:none;transform:translateY(-3px);box-shadow:0 10px 26px #254b7510}.card-top{color:var(--blue);justify-content:space-between;align-items:center;gap:8px;margin-bottom:14px;display:flex}.category{font-size:12px;font-weight:650}.card-number{font-variant-numeric:tabular-nums;color:var(--muted);margin-right:7px;font-size:11px}.guide-card h2,.guide-card h3{letter-spacing:-.45px;-webkit-line-clamp:3;-webkit-box-orient:vertical;margin-bottom:12px;font-size:20px;font-weight:720;line-height:1.55;display:-webkit-box;overflow:hidden}.guide-card .excerpt{color:#4c6381;-webkit-line-clamp:2;-webkit-box-orient:vertical;margin-bottom:20px;font-size:13px;line-height:1.85;display:-webkit-box;overflow:hidden}.card-cover{background:#f0f6ff;border:1px solid #e0ebf9;border-radius:10px;height:158px;margin-top:auto;position:relative;overflow:hidden}.card-cover .cover-text{background:linear-gradient(120deg,#f5f9ff,#e9f2ff);flex-direction:column;justify-content:center;padding:22px;display:flex;position:absolute;inset:0}.card-cover .cover-text small{color:#416694;letter-spacing:.15em;margin-bottom:11px;font-size:9px}.card-cover .cover-text strong{white-space:pre-line;letter-spacing:-.4px;font-size:22px;font-weight:680;line-height:1.45}.card-cover img{object-fit:cover;opacity:0;width:100%;height:100%;transition:opacity .2s;position:absolute;inset:0}.card-cover.loaded img{opacity:1}.card-cover.loaded .cover-text{visibility:hidden}.source-mini{color:#536e90;margin:7px 0 0;font-size:10px;line-height:1.7}.card-meta{color:var(--muted);justify-content:space-between;align-items:center;gap:9px;margin-top:14px;font-size:11px;display:flex}.draft-pill{color:#506580;background:#f6f8fc;border-radius:4px;padding:3px 6px;font-size:10px}.grid.list{grid-template-columns:1fr}.grid.list .guide-card{grid-template-columns:155px minmax(0,1fr) 150px;gap:5px 25px;padding:18px;display:grid}.grid.list .card-top{grid-column:2;margin:0}.grid.list h2,.grid.list h3{grid-column:2;margin:0;font-size:19px}.grid.list .excerpt{-webkit-line-clamp:1;grid-column:2;margin:0}.grid.list .card-cover{grid-area:1/1/5;width:155px;height:126px}.grid.list .cover-text{padding:12px}.grid.list .cover-text strong{font-size:16px}.grid.list .cover-text small{margin:0 0 7px;font-size:8px}.grid.list .source-mini{display:none}.grid.list .card-meta{grid-area:2/3;margin:0;display:block}.grid.list .card-meta span{margin:7px 0;display:block}.empty{text-align:center;background:var(--wash);border:1px dashed #c9d9ed;border-radius:14px;padding:55px 20px}.empty h2{margin-bottom:12px;font-size:23px}.empty p{margin-bottom:20px;font-size:14px;line-height:1.8}.feature-strip{grid-template-columns:1fr 1fr;gap:25px;margin:22px 0 42px;display:grid}.feature-item{border:1px solid var(--line);background:#f8fbff;border-radius:14px;padding:30px}.feature-item h3{margin:12px 0;font-size:23px}.feature-item p{color:var(--muted);max-width:470px;font-size:14px;line-height:1.85}.feature-item a{margin-top:17px;font-size:13px;font-weight:600;display:inline-block}.breadcrumbs{color:var(--muted);flex-wrap:wrap;align-items:center;gap:10px;padding-top:32px;font-size:12px;line-height:1.8;display:flex}.breadcrumbs a{color:var(--muted)}.article-layout{grid-template-columns:minmax(0,1fr) 285px;align-items:start;gap:52px;margin-top:32px;display:grid}.article-title{letter-spacing:-1.1px;margin:14px 0 16px;font-size:38px;font-weight:750;line-height:1.45}.deck{color:#496380;margin-bottom:22px;font-size:16px;line-height:1.9}.byline{justify-content:space-between;align-items:center;gap:15px;margin:25px 0;display:flex}.author{align-items:center;gap:10px;display:flex}.author img{background:#f1f6ff;border:1px solid #dfebfc;border-radius:50%;width:37px;height:37px;padding:5px}.author strong{font-size:12px;display:block}.author small{color:var(--muted);margin-top:4px;font-size:11px;line-height:1.8;display:block}.reader-tools{gap:6px;display:flex}.reader-tools .icon-btn{border:0;width:33px;height:33px}.reader-tools button[aria-pressed=true]{color:var(--blue);background:var(--sky)}.hero-media .source-media{height:345px}.source-figure{margin:26px 0}.source-media{border:1px solid var(--line);background:#f2f7ff;border-radius:14px;height:300px;position:relative;overflow:hidden}.source-media img{object-fit:contain;opacity:0;width:100%;height:100%;position:absolute;inset:0}.source-media.loaded img{opacity:1}.source-media.loaded .media-placeholder{display:none}.media-placeholder{background:linear-gradient(120deg,#f5f9ff,#e8f2ff);flex-direction:column;justify-content:center;padding:38px;display:flex;position:absolute;inset:0}.media-placeholder small{letter-spacing:.14em;color:#436a9b;font-size:10px}.media-placeholder strong{white-space:pre-line;letter-spacing:-.7px;max-width:570px;margin:16px 0;font-size:33px;line-height:1.5}.media-placeholder .status{color:var(--muted);font-size:11px;line-height:1.8}.media-zoom{border:1px solid var(--line);width:35px;height:35px;color:var(--blue);z-index:2;background:#ffffffef;border-radius:50%;display:none;position:absolute;bottom:14px;right:14px}.loaded .media-zoom{display:block}.source-figure figcaption{color:var(--muted);margin-top:9px;font-size:12px;line-height:1.8}.source-figure figcaption a{color:#386497;text-underline-offset:3px;text-decoration:underline}.source-figure figcaption small{margin-top:3px;font-size:11px;display:block}.quick-summary h2{align-items:center;gap:9px;margin-bottom:13px;font-size:16px;display:flex}.quick-summary p{margin:0;font-size:14px;line-height:1.9}.quick-summary small{border-top:1px solid #d9e6fa;margin-top:12px;padding-top:11px;font-size:11px;line-height:1.8;display:block}.prose{letter-spacing:.004em;color:#354963;font-size:16px;line-height:1.95}.prose h2{letter-spacing:-.5px;margin:40px 0 20px;scroll-margin-top:104px;font-size:25px;font-weight:710;line-height:1.55}.prose h3{margin:30px 0 15px;font-size:20px;line-height:1.7}.prose ul,.prose ol{padding-left:23px}.prose a{word-break:break-word}.prose blockquote{border-left:3px solid var(--blue);background:#f5f9ff;border-radius:0 10px 10px 0;margin:22px 0;padding:12px 20px}.prose hr{border:0;border-top:1px solid var(--line);margin:34px 0}.prose pre,.prompt-box pre{white-space:pre-wrap;overflow-wrap:anywhere;color:#28425f;background:#f6f9fe;border:1px solid #d9e6f6;border-radius:10px;margin:0;padding:22px;font-size:13px;line-height:1.9}.prose code,.prompt-box code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.prose table{border-collapse:collapse;width:100%;font-size:13px;line-height:1.8}.prose th,.prose td{border:1px solid var(--line);text-align:left;vertical-align:top;padding:12px}.prose th{background:var(--sky);color:var(--ink)}.table-scroll{margin:22px 0;overflow:auto}.reference{white-space:nowrap;margin-left:2px;font-size:10px}.prompt-box{background:#f6f9fe;border:1px solid #c5dafa;border-radius:12px;margin:25px 0;overflow:hidden}.prompt-top{color:var(--ink);background:#edf4ff;border-bottom:1px solid #d9e5f7;justify-content:space-between;align-items:center;gap:15px;padding:14px 19px;font-size:13px;display:flex}.prompt-top button{color:var(--blue);background:#fff;border:1px solid #b6cced;border-radius:6px;padding:7px 12px;font-size:12px}.prompt-box pre{border:0;border-radius:0}.material-actions{flex-wrap:wrap;gap:10px;margin:20px 0;display:flex}.material-actions .btn{border-radius:8px;font-size:12px}.checklist{border:1px solid var(--line);background:#f8fbff;border-radius:13px;margin:28px 0;padding:23px}.checklist h3{margin-bottom:15px;font-size:17px}.checklist label{gap:11px;margin:11px 0;font-size:13px;line-height:1.9;display:flex}.checklist input{accent-color:var(--blue);flex:none;width:17px;height:17px;margin-top:4px}.check-footer{border-top:1px solid var(--line);color:var(--muted);justify-content:space-between;margin-top:17px;padding-top:12px;font-size:11px;line-height:1.8;display:flex}.check-footer button{color:var(--blue);background:0 0;border:0;font-size:11px}.sources ol{padding:0;list-style:none}.sources li{border-bottom:1px solid var(--line);padding:13px 0;font-size:12px;line-height:1.8}.sources strong{font-size:12px}.sources a{overflow-wrap:anywhere;display:block}.sources p{color:var(--muted);font-size:12px;line-height:1.8}.status-note{color:#65543a;background:#fcf8ef;border-left:3px solid #d0a449;border-radius:0 8px 8px 0;margin:20px 0;padding:13px 17px;font-size:13px;line-height:1.9}.editorial-note{color:var(--muted);margin:20px 0;font-size:12px;line-height:1.9}.sidebar{align-self:stretch;min-width:0}.sticky-rail{position:sticky;top:103px}.sidebar-box{border:1px solid var(--line);background:#f4f8ff;border-radius:13px;margin-bottom:26px;padding:23px}.sidebar-box h2{margin-bottom:10px;font-size:17px;line-height:1.7}.sidebar-box p{color:#4d6584;margin:10px 0;font-size:12px;line-height:1.9}.sidebar-box .btn{border-radius:8px;width:100%;margin:10px 0 0;font-size:13px}.toc{border-left:2px solid var(--blue);margin:24px 0;padding-left:17px}.toc h2{margin-bottom:15px;font-size:16px}.toc nav{scrollbar-width:thin;gap:3px;max-height:390px;display:grid;overflow:auto}.toc a{color:#526882;border-radius:5px;padding:7px 9px;font-size:12px;line-height:1.7}.toc a.active,.toc a:hover{color:var(--blue);background:var(--sky);text-decoration:none}.related-mini{margin-top:22px}.related-mini a{border-bottom:1px solid var(--line);color:#344c6c;padding:11px 0;font-size:13px;line-height:1.8;display:block}.mobile-toc{display:none}.video-section h3{margin-bottom:12px;font-size:18px}.video-shell{aspect-ratio:16/9;border:1px solid var(--line);background:#eaf3ff;border-radius:13px;position:relative;overflow:hidden}.video-shell iframe{background:#fff;border:0;width:100%;height:100%;position:absolute;inset:0}.video-shell .video-message{color:#446486;justify-content:center;align-items:center;padding:30px;font-size:15px;display:flex;position:absolute;inset:0}.video-section p{color:var(--muted);margin:9px 0;font-size:12px;line-height:1.85}.about-hero{max-width:910px;padding-top:68px}.about-hero h1{letter-spacing:-1px;margin:19px 0;font-size:43px;line-height:1.45}.about-hero p{color:var(--muted);font-size:17px;line-height:1.9}.about-grid{grid-template-columns:1fr 1fr;gap:24px;margin:35px 0 60px;display:grid}.about-grid section{border:1px solid var(--line);background:#fff;border-radius:14px;padding:28px}.about-grid h2{margin:0 0 15px;font-size:22px}.about-grid p{margin:13px 0;font-size:15px;line-height:1.9}.site-footer{border-top:1px solid var(--line);background:#f8fbff;margin-top:50px}.footer-inner{justify-content:space-between;align-items:center;gap:30px;padding-top:28px;padding-bottom:28px;display:flex}.footer-inner .brand-name{font-size:22px}.footer-inner .brand img{width:34px;height:34px}.footer-note{color:#536c88;max-width:525px;font-size:11px;line-height:1.8}.footer-actions{white-space:nowrap;align-items:center;gap:15px;font-size:12px;display:flex}.footer-actions button{border:1px solid var(--line);color:var(--muted);background:#fff;border-radius:6px;padding:8px 10px;font-size:11px}.preview-notice{border-top:1px solid var(--line);text-align:center;color:#61728b;background:#fcfdff;padding:9px 20px;font-size:11px;line-height:1.8}.preview-notice a{margin-left:8px}.toast{color:#fff;z-index:100;opacity:0;pointer-events:none;text-align:center;background:#15395e;border-radius:9px;max-width:calc(100vw - 30px);padding:12px 18px;font-size:13px;transition:opacity .2s,transform .2s;position:fixed;bottom:24px;left:50%;transform:translate(-50%,15px)}.toast.show{opacity:1;transform:translate(-50%)}dialog{border:1px solid var(--line);max-width:calc(100vw - 34px);color:var(--ink);border-radius:16px;width:900px;padding:0;box-shadow:0 20px 70px #11223d25}dialog::backdrop{backdrop-filter:blur(3px);background:#12254265}dialog .dialog-bar{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:15px 21px;font-size:13px;display:flex}dialog img{object-fit:contain;width:100%;height:70vh}dialog .dialog-caption{color:var(--muted);padding:13px 21px;font-size:12px;line-height:1.8}.large-text .prose,.large-text .deck{font-size:18px}.text-only iframe{display:none}.text-only .remote-media{display:none!important}.practice{border:1px solid #bdd5f7;border-radius:13px;margin:26px 0;overflow:hidden}.practice-top{color:var(--ink);background:#edf5ff;justify-content:space-between;gap:15px;padding:17px 21px;font-size:13px;display:flex}.practice-top small{color:var(--muted);font-size:11px}.example-tabs{flex-wrap:wrap;gap:6px;padding:19px 20px;display:flex}.example-tabs button{border:1px solid var(--line);color:#496384;background:#fff;border-radius:6px;padding:7px 11px;font-size:12px}.example-tabs button[aria-selected=true]{background:var(--blue);border-color:var(--blue);color:#fff}.practice-message{border:1px solid var(--line);background:#f8fafc;border-radius:10px;margin:0 20px;padding:19px}.practice-message small{color:var(--muted);font-size:11px}.practice-message h4{margin:9px 0;font-size:16px}.practice-message p{font-size:14px;line-height:1.9}.practice-bottom{padding:18px 20px}.teaching-answer{background:var(--sky);border-left:3px solid var(--blue);margin-top:15px;padding:15px;font-size:13px;line-height:1.8}.teaching-answer strong{display:block}.source-link{align-items:center;gap:6px;display:inline-flex}.page-top{padding-top:40px}.reveal{animation:.35s ease-out arrive}@keyframes arrive{0%{opacity:.5;transform:translateY(7px)}to{opacity:1;transform:translateY(0)}}@media (width>=1600px){.shell{width:min(1360px,100%)}.hero h1{font-size:58px}.article-title{font-size:42px}.article-layout{grid-template-columns:minmax(0,1fr) 306px;gap:65px}}@media (width<=1120px){.header-inner{gap:22px}.topnav{gap:19px}.brand small{display:none}.hero{grid-template-columns:1fr 260px;gap:35px}.hero h1{font-size:44px}.article-layout{grid-template-columns:minmax(0,1fr) 245px;gap:30px}.article-title{font-size:33px}.guide-card{padding:19px}.guide-card h2,.guide-card h3{font-size:18px}.grid{gap:16px}.hero-note{padding:22px}.header-actions .btn{padding:10px 15px}}@media (width<=880px){:root{--header:70px}.shell{padding:0 22px}.topnav{border-bottom:1px solid var(--line);background:#fff;flex-wrap:wrap;gap:22px;margin:0;padding:22px;display:none;position:absolute;top:70px;left:0;right:0}.topnav.open{display:flex}.topnav a[aria-current=page]:after{bottom:-8px}.header-actions{margin-left:auto}.menu-toggle{display:inline-flex}.brand img{width:38px;height:38px}.brand-name{font-size:24px}.hero{grid-template-columns:1fr;gap:25px;padding-top:36px;padding-bottom:29px}.hero-note{display:none}.hero h1{max-width:730px;font-size:44px}.hero-deck{font-size:15px}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-layout{margin-top:26px;display:block}.sidebar{display:none}.article-title{font-size:34px}.mobile-toc{border:1px solid var(--line);background:#fff;border-radius:10px;margin:20px 0;display:block}.mobile-toc summary{color:#355879;cursor:pointer;padding:14px 17px;font-size:13px}.mobile-toc nav{grid-template-columns:1fr 1fr;gap:5px;padding:8px 17px 16px;display:grid}.mobile-toc a{padding:5px;font-size:12px;line-height:1.8}.footer-inner{flex-wrap:wrap}.footer-note{max-width:100%}.feature-strip{gap:18px}.grid.list .guide-card{grid-template-columns:125px minmax(0,1fr)}.grid.list .card-cover{width:125px}.grid.list .card-meta{grid-area:4/2;display:flex}.hero-media .source-media{height:320px}.filter-tools{margin-left:auto}}@media (width<=550px){.shell{padding:0 19px}.brand img{width:33px;height:33px}.brand-name{font-size:23px}.brand{gap:7px}.header-inner{gap:10px}.header-actions{gap:9px}.header-actions>.btn{display:none}.header-actions .icon-btn{width:35px;height:35px}.hero{padding-top:30px}.hero h1{letter-spacing:-1px;margin-top:15px;font-size:35px;line-height:1.43}.hero h1 em{display:block}.hero-deck{font-size:14px;line-height:1.9}.search-form{border-radius:10px;gap:9px;min-height:58px;margin-top:23px;padding-left:13px}.search-form input{font-size:14px}.search-form button{min-width:42px;height:42px}.quick-searches{gap:6px}.quick-searches button{padding:6px 8px;font-size:11px}.quick-searches>span{display:none}.filterbar{gap:14px;margin-bottom:18px;padding:14px 0}.filters{gap:3px}.filters button{padding:7px 9px;font-size:12px}.filter-tools{justify-content:space-between;width:100%}.grid{grid-template-columns:1fr;gap:16px}.guide-card{padding:21px}.guide-card h2,.guide-card h3{-webkit-line-clamp:3;font-size:20px}.guide-card .excerpt{margin-bottom:17px;font-size:13px}.card-cover{height:162px}.source-mini{font-size:11px}.card-meta{font-size:12px}.grid.list .guide-card{display:flex}.grid.list .card-cover{display:none}.grid.list .card-meta{display:flex}.grid.list .excerpt{-webkit-line-clamp:2}.section-heading{align-items:start}.section-heading h2{font-size:24px}.section-heading>a{font-size:12px}.section-heading p{font-size:13px}.feature-strip{grid-template-columns:1fr}.feature-item{padding:24px}.breadcrumbs{gap:7px;padding-top:23px;font-size:11px}.article-title{letter-spacing:-.7px;margin:13px 0;font-size:28px;line-height:1.55}.deck{font-size:14px;line-height:1.9}.byline{align-items:start;gap:6px}.author{gap:8px}.author img{width:30px;height:30px}.author small{max-width:206px;font-size:10px}.author strong{font-size:11px}.reader-tools{gap:0}.reader-tools .icon-btn{width:29px;height:29px}.reader-tools .icon{width:16px;height:16px}.hero-media .source-media{height:245px}.media-placeholder{padding:23px}.media-placeholder strong{margin:11px 0;font-size:26px;line-height:1.5}.media-placeholder small{font-size:9px}.media-placeholder .status{max-width:250px;font-size:11px}.source-figure figcaption{font-size:12px}.source-figure figcaption small{font-size:11px}.quick-summary{padding:19px}.quick-summary p{font-size:13px}.prose{font-size:15px;line-height:1.95}.prose h2{margin-top:32px;font-size:21px;line-height:1.65}.prose h3{font-size:18px}.prose table{min-width:510px}.source-media{height:250px}.prompt-top{padding:13px 15px;font-size:12px}.prompt-box pre{padding:19px 17px;font-size:12px}.material-actions .btn{width:100%}.checklist{padding:20px}.checklist label{font-size:13px}.about-hero{padding-top:35px}.about-hero h1{letter-spacing:-.7px;font-size:31px}.about-hero p{font-size:15px}.about-grid{grid-template-columns:1fr;gap:17px;margin-top:27px}.about-grid section{padding:23px}.footer-inner{gap:18px}.footer-actions{justify-content:space-between;width:100%}.preview-notice{padding:10px 19px;font-size:11px}.practice-top{flex-direction:column;gap:4px}.source-list{font-size:12px}.large-text .prose{font-size:17px}.video-message{font-size:13px}.hero-buttons{flex-wrap:wrap}.empty h2{font-size:20px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}.guide-card:hover{transform:none}}@media print{.site-header,.sidebar,.reader-tools,.mobile-toc,.video-section,.site-footer,.material-actions,.preview-notice,.toast{display:none!important}.article-layout{display:block}.shell{width:auto;padding:0}.prose{font-size:11pt}.article-title{font-size:23pt}.source-figure,.prompt-box{break-inside:avoid}}.article-title,.guide-card h2,.about-hero h1{text-wrap:balance}.title-keep{white-space:nowrap}.title-subline{display:block}:root{--ink:#0e2039;--body:#263b54;--muted:#405672;--blue:#1259d9;--blue-dark:#0846af;--sky:#f0f6ff;--line:#d6e2f0}body,.hero-deck,.excerpt,.deck,.prose,.hero-note p,.about-hero p{color:var(--body)}.eyebrow,.source-mini,.card-meta,.brand small,.category small,.byline small,.footer-note,.countline>span,.quick-searches>span,.source-figure figcaption,.source-figure figcaption small,.editorial-note,.media-boundary,.media-credit{color:var(--muted)}.source-mini,.card-meta,.byline small,.source-figure figcaption,.source-figure figcaption small,.editorial-note,.footer-note{font-size:12px;line-height:1.8}.guide-card h2{font-weight:700;line-height:1.65}.guide-card .excerpt{line-height:1.85}.source-mini{margin-top:10px;display:block}.card-meta{margin-top:12px}.draft-pill{color:#31578b;background:#edf4ff;border-color:#d4e1f4}.start-note{background:#f1f6ff;border:1px solid #d2e2fa;border-radius:18px;padding:29px 26px;box-shadow:0 8px 35px #14375c05}.start-note h2{letter-spacing:-.5px;font-size:28px;line-height:1.6}.start-note p{font-size:13px;line-height:1.85}.start-steps{gap:5px;margin:20px 0;display:grid}.start-steps a{color:var(--ink);border-bottom:1px solid #d5e3f5;align-items:center;gap:12px;padding:11px 0;font-size:13px;text-decoration:none;display:flex}.start-steps a span{color:var(--blue);font-variant-numeric:tabular-nums;background:#fff;border:1px solid #c4d9f9;border-radius:7px;padding:5px;font-size:10px}.start-steps a .icon{width:15px;margin-left:auto;transition:transform .18s}.start-steps a:hover .icon{transform:translate(2px,-2px)}.start-link{font-size:13px;font-weight:650}.filterbar{flex-wrap:wrap;gap:18px}.filters{flex-wrap:wrap;gap:6px}.filter-tools{flex-wrap:wrap;margin-left:auto}.filter-tools select{border:1px solid var(--line);max-width:145px;color:var(--body);background:#fff;border-radius:7px;padding:8px 11px;font-size:12px}.cover-text span{color:var(--muted);margin-top:8px;font-size:11px;display:block}.cover-text small{color:#3d5c81}.cover-text strong{white-space:pre-line;font-size:20px;line-height:1.6}.source-preview{background:#f3f7fd;border:1px solid #e1eaf6;border-radius:12px;align-items:center;gap:16px;min-height:130px;margin-top:auto;padding:21px 20px;display:flex}.source-preview small{letter-spacing:.07em;color:#415e80;font-size:9px;display:block}.source-preview strong{margin:5px 0;font-size:14px;line-height:1.65;display:block}.source-preview span:not(.play-ring):not(.x-mark){color:#415671;font-size:11px}.play-ring{width:42px;height:42px;color:var(--blue);background:#fff;border:1px solid #b8cff2;border-radius:50%;flex:none;justify-content:center;align-items:center;font-size:13px;display:flex}.x-mark{color:var(--ink);flex:none;justify-content:center;align-items:center;width:39px;font-family:system-ui,sans-serif;font-size:27px;display:flex}.text-preview{background:#fbfcfe;min-height:95px}.text-preview>span{color:var(--blue)}.grid.list .source-preview{display:none}.source-media{min-height:260px}.source-media .media-placeholder{padding:28px}.source-figure figcaption{flex-wrap:wrap;justify-content:space-between;gap:12px;display:flex}.media-zoom{opacity:0;pointer-events:none}.source-media.loaded .media-zoom{opacity:1;pointer-events:auto}.source-embed-heading{justify-content:space-between;align-items:center;gap:14px;margin-bottom:15px;display:flex}.source-embed-heading h3{margin:0;font-size:17px;font-weight:650;line-height:1.7}.source-embed-heading .eyebrow{letter-spacing:.12em;font-size:10px}.video-section{margin:28px 0}.video-shell{background:#edf3fc;border:1px solid #d4e0ef;border-radius:13px;min-height:180px}.video-shell iframe{background:0 0;border:0}.media-credit{line-height:1.75;margin:10px 0 5px!important;font-size:12px!important}.media-boundary{line-height:1.8;margin:4px 0!important;font-size:12px!important}.original-post{margin:35px 0}.tweet-box{border:1px solid var(--line);background:#f9fbff;border-radius:13px;min-height:150px;padding:20px;overflow:hidden}.tweet-mount{justify-content:center;display:flex}.tweet-fallback{grid-template-columns:40px 1fr;align-items:start;gap:15px;display:grid}.tweet-fallback strong{font-size:14px}.tweet-fallback p{margin:7px 0;font-size:14px;line-height:1.8}.tweet-fallback a{font-size:12px}.tweet-fallback small{color:var(--muted);grid-column:2;font-size:11px}.tweet-box.loaded{background:#fff;padding:8px}.tweet-box.loaded .tweet-fallback{display:none}.goal-progress{background:#e2ebf7;border-radius:10px;height:6px;margin:25px 0;overflow:hidden}.goal-progress>span{background:var(--blue);border-radius:10px;height:100%;display:block}.editorial-stats{border:1px solid var(--line);border-radius:14px;grid-template-columns:repeat(4,1fr);display:grid;overflow:hidden}.editorial-stats section{border-right:1px solid var(--line);background:#fff;padding:26px 23px}.editorial-stats section:last-child{border-right:0}.editorial-stats small{color:var(--body);font-size:12px;display:block}.editorial-stats strong{letter-spacing:-1.5px;margin:7px 0;font-size:40px;line-height:1.5;display:block}.editorial-stats strong span{color:#47617f;font-size:20px}.editorial-stats p{color:var(--muted);font-size:12px;line-height:1.8}.editorial-toolbar{flex-wrap:wrap;align-items:center;gap:12px;margin-top:26px;display:flex}.editorial-toolbar label{align-items:center;gap:12px;margin-right:auto;font-size:13px;display:flex}.editorial-toolbar input{color:var(--ink);background:#fff;border:1px solid #bccfe7;border-radius:8px;width:min(320px,50vw);padding:11px 14px}.editorial-toolbar .btn{font-size:12px}.editorial-table{border:1px solid var(--line);border-radius:12px;margin-top:20px}.editorial-table table{min-width:870px;font-size:13px;line-height:1.8}.editorial-table td{vertical-align:top;padding:17px 18px}.editorial-table td:first-child{white-space:nowrap;color:var(--muted);font-family:ui-monospace,monospace;font-size:11px}.editorial-table td:nth-child(2){width:44%}.editorial-table td a{font-weight:600;line-height:1.8}.editorial-table small{color:var(--muted);margin-top:6px;font-size:11px;display:block}.editorial-table select{color:var(--body);background:#fff;border:1px solid #b9cfe9;border-radius:6px;padding:7px 9px;font-size:12px}.editorial-table details{margin-top:9px;font-size:12px}.editorial-table details p{max-width:420px;margin:9px 0;font-size:12px;line-height:1.8}.editorial-table summary{cursor:pointer;color:var(--blue)}.queued-row{background:#fbfcfe}.status-chip{color:#164d98;white-space:nowrap;background:#e9f3ff;border-radius:6px;padding:3px 8px;font-size:11px;display:inline-block}.status-chip.queued{color:#4d5f76;background:#eef1f5}.media-health{border:1px solid var(--line);background:var(--wash);border-radius:14px;margin:38px 0;padding:25px}.media-health h2{font-size:21px}.media-health p{margin:13px 0;font-size:13px;line-height:1.9}.health-row{border-top:1px solid var(--line);overflow-wrap:anywhere;justify-content:space-between;gap:15px;padding:11px 0;font-size:12px;line-height:1.9;display:flex}.health-row code{max-width:65%;font-size:11px}.health-row strong{font-weight:500}.media-health .btn{margin-top:17px;font-size:12px}.start-hub{grid-template-columns:1.1fr 1fr;gap:28px;margin-bottom:36px;display:grid}.journey-options{gap:10px;display:grid}.journey-options button{text-align:left;border:1px solid var(--line);width:100%;color:var(--ink);background:#fff;border-radius:11px;align-items:center;gap:15px;padding:21px;transition:border-color .18s,background .18s;display:flex}.journey-options button>span{color:var(--blue);font-family:ui-monospace,monospace;font-size:12px}.journey-options button>b{font-size:15px;line-height:1.7}.journey-options button>.icon{width:18px;margin-left:auto}.journey-options button[aria-pressed=true]{background:#edf5ff;border-color:#80acef}.journey-answer{background:#f1f6ff;border:1px solid #ccddf4;border-radius:14px;align-self:start;padding:32px;position:sticky;top:105px}.journey-answer h2{margin:16px 0;font-size:25px;line-height:1.6}.journey-answer p{font-size:14px;line-height:1.9}.journey-answer .btn{margin-top:25px;font-size:13px}.access-note{border-top:1px solid var(--line);margin:40px 0;padding:26px}.access-note h2{margin-bottom:15px;font-size:22px}.access-note p{max-width:760px;margin-bottom:18px;font-size:14px;line-height:1.9}.preview-notice{color:#3b526e;flex-wrap:wrap;align-items:center;gap:15px;font-size:11px;line-height:1.8;display:flex}.preview-notice>a{margin-left:0}.preview-notice>a:first-child{margin-left:auto}#page-root.page-enter{animation:.24s both page-in}.guide-card{transition:transform .2s,border-color .2s,box-shadow .2s}.guide-card:hover{border-color:#a3c3f2;transform:translateY(-3px);box-shadow:0 10px 30px #1b437813}@keyframes page-in{0%{opacity:.4;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@media (width<=1100px){.filter-tools{margin-left:0}.editorial-stats strong{font-size:32px}.editorial-stats section{padding:20px 18px}.hero .start-note{padding:23px}.start-note h2{font-size:25px}}@media (width<=880px){.editorial-stats{grid-template-columns:1fr 1fr}.editorial-stats section:nth-child(2){border-right:0}.editorial-stats section:nth-child(-n+2){border-bottom:1px solid var(--line)}.start-hub{grid-template-columns:1fr}.journey-answer{position:static}.original-post{margin:25px 0}.source-embed-heading{flex-direction:column;align-items:start;gap:4px}.hero .start-note{display:none}}@media (width<=550px){.filter-tools{gap:7px}.filter-tools select{max-width:133px;padding:8px;font-size:11px}.filters button{font-size:12px}.countline{align-items:start;gap:12px;font-size:12px}.countline>span{text-align:right;max-width:170px;font-size:11px}.guide-card h2{font-size:19px}.source-preview{min-height:105px;padding:18px}.source-media{min-height:205px}.source-media .media-placeholder{padding:22px}.media-placeholder strong{font-size:24px}.source-figure figcaption{gap:3px}.source-figure figcaption small{width:100%;display:block}.tweet-box{padding:16px}.tweet-fallback{gap:9px}.tweet-fallback p{font-size:13px}.editorial-stats section{padding:18px 14px}.editorial-stats strong{font-size:33px}.editorial-stats p{font-size:11px}.editorial-toolbar{gap:9px}.editorial-toolbar label{flex-direction:column;align-items:stretch;width:100%}.editorial-toolbar input{width:100%;max-width:none}.editorial-toolbar .btn{padding:10px 13px;font-size:11px}.journey-options button{gap:11px;padding:18px 15px}.journey-options button>b{font-size:14px}.journey-answer{padding:25px}.media-health{padding:20px}.media-health h2{font-size:19px}.preview-notice{padding:16px 20px}.preview-notice>a:first-child{margin-left:0}.prose{font-size:16px}.prose p{line-height:1.95}.source-mini{font-size:12px}.article-title{font-size:28px}.deck{font-size:15px;line-height:1.9}}@media (prefers-reduced-motion:reduce){#page-root.page-enter{animation:none}.guide-card:hover,.btn:active{transform:none}*{scroll-behavior:auto!important}}.original-library{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin:20px 0 55px;display:grid}.original-tile{border:1px solid var(--line);border-radius:14px;min-width:0;padding:20px}.original-tile .source-figure{margin:18px 0}.original-tile .source-media{aspect-ratio:16/10;min-height:235px;max-height:365px}.original-tile .source-media img{object-fit:contain}.original-tile .media-placeholder strong{font-size:23px;line-height:1.6}.original-tile-meta p{font-size:13px;line-height:1.8}.original-tile-meta small{color:var(--muted);margin:9px 0;font-size:11px;line-height:1.8;display:block}.original-tile-meta a{margin:10px 0;font-size:12px;line-height:1.8;display:block}.original-tile-meta label{align-items:start;gap:9px;margin:14px 0 7px;font-size:13px;line-height:1.9;display:flex}.original-tile-meta input{accent-color:var(--blue);flex:none;width:16px;height:16px;margin-top:4px}@media (width<=780px){.original-library{grid-template-columns:1fr}.original-tile{padding:17px}.original-tile .source-media{min-height:210px}}.source-figure .remote-media{object-fit:contain;background:#f6f9fe}.source-figure figcaption small{font-size:12px}.source-preview div>span{font-size:12px!important}body{background:#fff}.shell{width:min(1340px,100%)}.site-header{background:#fffffff7}.header-inner{gap:24px}.brand small{color:#506580;font-size:11px}.topnav{gap:24px}.catalog-hero{grid-template-columns:minmax(0,1fr) 410px;align-items:center;gap:52px;padding-top:40px;padding-bottom:27px;display:grid}.catalog-hero h1{letter-spacing:-1.4px;max-width:790px;margin:12px 0 13px;font-size:42px;line-height:1.3}.catalog-hero .hero-deck{max-width:675px;color:var(--muted);font-size:15px;line-height:1.85}.catalog-search .search-form{min-height:57px;box-shadow:none;border-radius:11px;gap:10px;margin:0;padding:6px 7px 6px 16px}.catalog-search .search-form input{font-size:14px}.search-form kbd{color:#596a80;background:#f8faff;border:1px solid #d8e2ee;border-radius:5px;padding:3px 7px;font:12px ui-monospace,monospace}.catalog-search .search-form button{width:40px;min-width:40px;height:42px}.catalog-search .search-form>.icon{width:19px;height:19px}.catalog-search .quick-searches{gap:6px;margin-top:10px}.catalog-search .quick-searches button{color:#344c6c;background:#fff;border-color:#d5e2f2;padding:6px 8px;font-size:11px}.media-library-layout{padding-top:0}.media-library-layout .filterbar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);flex-wrap:wrap;align-items:center;gap:16px;margin-bottom:0;padding:12px 0 13px;display:flex}.media-library-layout .filters{flex-wrap:wrap;align-items:center;gap:5px;overflow-x:auto}.media-library-layout .filters button{color:#455976;white-space:nowrap;background:0 0;border:1px solid #0000;border-radius:8px;padding:9px 13px;font-size:13px}.media-library-layout .filters button[aria-pressed=true]{color:#1253c3;background:#eaf2ff;border-color:#dae7fc;font-weight:650}.media-library-layout .filters button:hover{background:#f2f7fd}.library-tools{justify-content:space-between;align-items:center;gap:16px;padding:17px 0 4px;display:flex}.collection-toggles{flex-wrap:wrap;align-items:center;gap:7px;display:flex}.collection-toggles button{color:#445b78;background:#fff;border:1px solid #d8e3ef;border-radius:8px;align-items:center;gap:6px;min-height:36px;padding:7px 10px;font-size:12px;display:inline-flex}.collection-toggles .icon{width:15px;height:15px}.collection-toggles button[aria-pressed=true]{color:#1450b3;background:#edf4ff;border-color:#9cbff9}.filter-tools{align-items:center;gap:10px;display:flex}.filter-tools select{color:#3c526f;background:#fff;border:1px solid #dce5f1;border-radius:7px;max-width:140px;padding:8px;font-size:12px}.filter-tools .view-toggle{margin-left:0}.view-toggle button{background:#fff}.view-toggle button[aria-pressed=true]{color:#145ad5;background:#edf4ff}.countline{color:#5a6b83;justify-content:space-between;align-items:center;margin:0;padding:15px 0 17px;font-size:12px;display:flex}.countline b{color:#465b76;font-weight:500}.grid#guide-grid{grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch;gap:32px 24px;padding-bottom:40px;display:grid}.grid .guide-card.cover-first{box-shadow:none;color:var(--ink);cursor:pointer;isolation:isolate;background:0 0;border:0;border-radius:0;flex-direction:column;min-width:0;padding:0;display:flex;position:relative;overflow:visible;transform:none}.grid .guide-card.cover-first:hover{box-shadow:none;background:0 0;border:0;transform:none}.cover-first .cover-wrap{width:100%;margin:0 0 15px;position:relative}.cover-first .card-cover-link{outline-offset:4px;color:inherit;border-radius:16px;text-decoration:none;display:block;overflow:hidden}.cover-first .card-cover{aspect-ratio:16/10;background:#edf2f9;border:1px solid #d7e3f2;border-radius:16px;width:100%;height:auto;margin:0;position:relative;overflow:hidden;box-shadow:0 1px 2px #172c4610}.cover-first .card-cover:after{content:"";pointer-events:none;opacity:0;background:linear-gradient(#0000,#06122e80);transition:opacity .25s;position:absolute;inset:55% 0 0}.cover-first .card-cover.loaded:after{opacity:1}.cover-first .card-cover .remote-media{object-fit:cover;object-position:center;opacity:1;z-index:1;border-radius:0;width:100%;height:100%;transition:transform .35s;position:absolute;inset:0}.cover-first .card-cover.fit-contain .remote-media{object-fit:contain;background:#edf2f8}.cover-first .card-cover:not(.loaded) .remote-media{opacity:0}.cover-first .card-cover.loaded .cover-fallback{display:none}.cover-first:hover .card-cover.loaded .remote-media{transform:scale(1.028)}.cover-first .card-cover:after{z-index:2}.cover-first .cover-fallback{color:#224163;background:linear-gradient(120deg,#f1f6fc,#eaf2fd);flex-direction:column;justify-content:center;padding:27px 29px 45px;display:flex;position:absolute;inset:0}.cover-first .fallback-eyebrow{letter-spacing:.08em;color:#4d6c94;margin-bottom:13px;font:10px/1.6 ui-monospace,monospace}.cover-first .cover-fallback strong{color:#24466e;letter-spacing:-.5px;max-width:270px;font-size:26px;font-weight:650;line-height:1.45}.cover-first .cover-status{color:#526782;margin-top:13px;font-size:11px;line-height:1.7}.cover-first .media-badge{z-index:3;color:#2f4869;letter-spacing:.02em;background:#ffffffec;border:1px solid #ffffffb3;border-radius:6px;align-items:center;gap:7px;max-width:75%;padding:6px 8px;font-size:10px;line-height:1.3;display:inline-flex;position:absolute;bottom:13px;left:14px}.cover-first .media-badge>span{color:#255aa5;font-size:11px;font-weight:750}.cover-first .cover-save{z-index:5;color:#536b8a;background:#fffefc;border:1px solid #dde6f0;border-radius:10px;justify-content:center;align-items:center;width:35px;height:35px;display:flex;position:absolute;top:12px;right:12px;box-shadow:0 2px 6px #0f254618}.cover-first .cover-save .icon{width:17px;height:17px}.cover-first .cover-save:hover{color:var(--blue);background:#f1f6ff}.cover-first .cover-save[aria-pressed=true]{color:#fff;background:var(--blue);border-color:var(--blue)}.cover-first .cover-save[aria-pressed=true] .icon{fill:currentColor;stroke-width:1.2px}.cover-first .cover-play{z-index:5;color:#1d57b9;background:#ffffffec;border:1px solid #c4d7f3;border-radius:50%;justify-content:center;align-items:center;width:38px;height:38px;transition:transform .2s,background .2s;display:flex;position:absolute;bottom:14px;right:14px}.cover-first .cover-play .icon{fill:currentColor;stroke-width:1px;width:16px;height:16px}.cover-first .cover-play:hover{background:var(--blue);color:#fff;transform:scale(1.06)}.cover-first .card-body{flex-direction:column;flex:1;min-width:0;padding:0 1px;display:flex}.cover-first .card-kinds{gap:5px;margin-bottom:8px;display:flex}.cover-first .content-kind{color:#235799;letter-spacing:.02em;background:#f0f5fe;border:1px solid #dce8fb;border-radius:99px;padding:3px 7px;font-size:10px;line-height:1.5}.cover-first .card-author{color:#2d405b;align-items:center;gap:7px;width:fit-content;max-width:100%;margin-bottom:5px;font-size:12px;font-weight:650;line-height:1.55;text-decoration:none;display:flex}.cover-first .card-author>span:nth-child(2){white-space:nowrap;text-overflow:ellipsis;max-width:290px;overflow:hidden}.cover-first .card-author>.icon{color:#6d809d;flex:none;width:12px;height:12px}.cover-first .card-author:hover{color:var(--blue)}.cover-first .author-platform{color:#315780;background:#edf3fb;border:1px solid #dfe9f4;border-radius:50%;flex:none;justify-content:center;align-items:center;width:22px;height:22px;font:10px ui-monospace,monospace;display:flex}.cover-first .card-reading{color:#526680;align-items:center;gap:8px;margin:2px 0 10px;font-size:11px;line-height:1.7;display:flex}.cover-first h2{letter-spacing:-.35px;color:#142a49;-webkit-line-clamp:unset;min-height:0;margin:0 0 8px;font-size:19px;font-weight:720;line-height:1.52;display:block}.cover-first h2 a{color:inherit;text-decoration:none}.cover-first h2 a:hover{color:var(--blue)}.cover-first .excerpt{color:#445a76;-webkit-line-clamp:2;-webkit-box-orient:vertical;min-height:48px;margin:0 0 16px;font-size:13px;line-height:1.85;display:-webkit-box;overflow:hidden}.cover-first .card-end{color:#58708d;border-top:1px solid #e3eaf4;justify-content:space-between;align-items:center;gap:10px;margin-top:auto;padding:12px 0 0;font-size:11px;line-height:1.6;display:flex}.cover-first .card-end a{color:#20395b;align-items:center;gap:8px;font-size:12px;font-weight:650;text-decoration:none;display:flex}.cover-first .card-end a:hover{color:var(--blue)}.cover-first .card-end a span{transition:transform .18s}.cover-first .card-end a:hover span{transform:translate(3px)}.grid.list#guide-grid{grid-template-columns:1fr;gap:22px}.grid.list .guide-card.cover-first{border-bottom:1px solid var(--line);grid-template-columns:285px minmax(0,1fr);gap:25px;padding-bottom:22px;display:grid}.grid.list .cover-first .cover-wrap{margin:0}.grid.list .cover-first .card-reading{margin:0 0 5px}.grid.list .cover-first .card-kinds{margin-bottom:5px}.grid.list .cover-first h2{font-size:21px}.grid.list .cover-first .excerpt{min-height:0}.grid.list .cover-first .card-end{border:0;padding:0}.video-dialog{border:1px solid var(--line);width:min(920px,100vw - 32px);color:var(--ink);background:#fff;border-radius:16px;max-height:92vh;padding:0;overflow:auto;box-shadow:0 25px 90px #142b6240}.video-dialog::backdrop{backdrop-filter:blur(3px);background:#08173199}.video-dialog-head{justify-content:space-between;align-items:center;gap:20px;padding:18px 22px;display:flex}.video-dialog-head h2{margin:3px 0 0;font-size:18px;line-height:1.5}.video-dialog-head .eyebrow{font-size:10px}.video-dialog-head button{flex:none}#video-mount{aspect-ratio:16/9;color:#dce6fa;background:#0f1728;place-items:center;display:grid;position:relative}#video-mount iframe{border:0;width:100%;height:100%;position:absolute;inset:0}.video-source-credit{padding:14px 22px 5px;font-size:12px;line-height:1.8}.video-modal-note{color:#526680;margin:0;padding:0 22px 18px;font-size:12px}#video-mount>p{text-align:center;max-width:75%;font-size:13px;line-height:1.8}.prose{color:#30455e}.deck,.hero-deck{color:#4d617c}.prose small,.media-credit,.source-figure figcaption{color:#4c607a;font-size:12px}.card-author{user-select:text}@media (width>=1550px){.shell{width:min(1380px,100%)}.grid#guide-grid{column-gap:26px}.catalog-hero{padding-top:46px}.cover-first h2{font-size:21px}}@media (width<=1150px){.catalog-hero{grid-template-columns:minmax(0,1fr) 345px;gap:25px}.catalog-hero h1{font-size:35px}.topnav{gap:15px}.header-inner{gap:17px}.brand small{display:none}.grid#guide-grid{gap:28px 19px}.cover-first .cover-fallback{padding:20px 22px 38px}.cover-first .cover-fallback strong{font-size:23px}.cover-first h2{font-size:18px}.library-tools{align-items:start}.filter-tools{flex-wrap:wrap;justify-content:flex-end}}@media (width<=900px){.catalog-hero{grid-template-columns:1fr;gap:20px;padding-top:29px;padding-bottom:23px}.catalog-hero h1{font-size:38px}.catalog-search,.catalog-search .search-form{max-width:none}.grid#guide-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.library-tools{flex-wrap:wrap}.filter-tools{justify-content:flex-start}.cover-first h2{font-size:19px}.topnav{top:70px}.grid.list .guide-card.cover-first{grid-template-columns:235px minmax(0,1fr)}}@media (width<=600px){.shell{padding-left:20px;padding-right:20px}.header-search-button{display:none}.catalog-hero{padding-top:26px}.catalog-hero .eyebrow{font-size:10px}.catalog-hero h1{letter-spacing:-.7px;font-size:30px;line-height:1.4}.catalog-hero .hero-deck{font-size:13px;line-height:1.85}.catalog-search .search-form{min-height:54px}.catalog-search .quick-searches{gap:6px}.media-library-layout .filterbar{padding:10px 0}.media-library-layout .filters{flex-wrap:nowrap;width:100%;padding-bottom:3px}.media-library-layout .filters button{padding:8px 10px;font-size:12px}.library-tools{gap:12px;padding-top:12px}.collection-toggles{gap:5px}.collection-toggles button{min-height:33px;padding:6px 8px;font-size:11px}.filter-tools{justify-content:flex-start;gap:7px;width:100%}.filter-tools select{max-width:135px;padding:7px;font-size:11px}.view-toggle{margin-left:auto!important}.countline{padding:14px 0;font-size:11px}.countline>span{display:none}.grid#guide-grid{grid-template-columns:1fr;row-gap:29px}.cover-first .card-cover{aspect-ratio:16/10;border-radius:14px}.cover-first .card-cover-link{border-radius:14px}.cover-first .cover-fallback{padding:25px 27px 45px}.cover-first .cover-fallback strong{font-size:26px}.cover-first .cover-wrap{margin-bottom:13px}.cover-first .card-author,.cover-first .card-reading{font-size:12px}.cover-first h2{font-size:20px;line-height:1.52}.cover-first .excerpt{min-height:0;margin-bottom:14px;font-size:13px;line-height:1.8}.cover-first .card-end{font-size:12px}.cover-first .content-kind{font-size:11px}.grid.list .guide-card.cover-first{grid-template-columns:120px minmax(0,1fr);gap:14px}.grid.list .cover-first h2{font-size:15px}.grid.list .cover-first .card-cover{aspect-ratio:1/1.15}.grid.list .cover-first .excerpt,.grid.list .cover-first .card-reading,.grid.list .cover-first .content-kind,.grid.list .cover-first .card-end>span{display:none}.grid.list .cover-first .card-author{margin-bottom:6px;font-size:10px}.grid.list .cover-first .card-author>span:nth-child(2){max-width:110px}.grid.list .cover-first .card-author>.icon{display:none}.grid.list .cover-first .cover-fallback{padding:15px 12px}.grid.list .cover-first .cover-fallback strong{font-size:16px;line-height:1.4}.grid.list .cover-first .fallback-eyebrow,.grid.list .cover-first .cover-status{display:none}.grid.list .cover-first .cover-save{border-radius:7px;width:26px;height:26px;top:5px;right:5px}.grid.list .cover-first .cover-play{width:27px;height:27px;bottom:8px;right:7px}.grid.list .cover-first .media-badge{max-width:72%;padding:4px;font-size:8px;bottom:7px;left:5px}.grid.list .cover-first .card-end{padding-top:3px}.video-dialog-head{padding:15px}.video-dialog-head h2{font-size:15px}.video-source-credit,.video-modal-note{padding-left:15px;padding-right:15px}.header-actions>.btn{padding:9px 12px;font-size:12px}}@media (prefers-reduced-motion:reduce){.cover-first *{transition:none!important;animation:none!important}.cover-first:hover .card-cover.loaded .remote-media{transform:none}}@media print{.cover-save,.cover-play,.library-tools,.filterbar,.catalog-search{display:none!important}.grid#guide-grid{grid-template-columns:repeat(2,1fr)}.cover-first{break-inside:avoid}}.load-more-row{justify-content:center;margin:-8px 0 30px;display:flex}.load-more-row .btn{border-radius:9px;min-width:200px;font-size:13px}:root{--ink:#10213b;--body:#2e435e;--muted:#475b75;--blue:#1261ee;--line:#d5e1f0}body{color:var(--body)}.excerpt,.hero-deck,.deck,.card-reading,.card-end,.byline small,.sources p,.media-credit,.media-boundary,.editorial-note{color:#405570}.eyebrow{color:#295b9e}.topnav a{color:#283e5b}.card-cover .local-media{object-fit:contain;opacity:1;width:100%;height:100%;display:block;position:absolute;inset:0}.source-media .local-media{opacity:1;object-fit:contain;width:100%;height:auto;display:block;position:relative}.source-media:has(.local-media){aspect-ratio:1200/750;background:#f6faff;height:auto}.local-figure{margin:28px 0}.local-figure .source-media{border:1px solid #d3e0ef;border-radius:13px;overflow:hidden}.local-figure figcaption{color:#435c7a;justify-content:space-between;gap:12px;margin-top:9px;font-size:12px;line-height:1.8;display:flex}.local-figure figcaption a{white-space:nowrap;color:#21599b}.media-badge{border:1px solid #d6e3f3;color:#17436f!important;background:#fff!important;font-size:10px!important}.card-cover{background:#f2f7ff}.cover-first:hover .local-media{transition:transform .24s;transform:scale(1.012)}.media-zoom{color:#0e4eb8;background:#fff}.source-figure .media-placeholder,.source-media.failed .local-media{display:none}.source-media.failed:after{content:"本地配图暂未读取，请检查素材文件";color:#354c68;place-content:center;min-height:240px;display:grid}.lesson-widget{background:#fff;border:1px solid #bfd3ef;border-radius:15px;margin:30px 0;scroll-margin-top:100px;overflow:hidden}.lesson-widget>header{background:#f0f6ff;justify-content:space-between;align-items:center;gap:14px;padding:22px 24px;display:flex}.lesson-widget header h2{color:#10213b;margin:8px 0 0;font-size:21px;line-height:1.5}.lesson-widget .eyebrow{margin:0;font-size:10px}.lesson-tag{color:#164f9e;white-space:nowrap;border:1px solid #aac9f4;border-radius:6px;padding:5px 8px;font-size:11px}.lesson-problem{color:#2e4560;margin:22px 24px;font-size:16px;line-height:1.85}.lesson-records{border:1px solid #d6e2f1;border-radius:9px;margin:0 24px;overflow:hidden}.lesson-records>div{border-bottom:1px solid #e0e8f3;grid-template-columns:130px 1fr;gap:15px;padding:12px 15px;font-size:14px;line-height:1.7;display:grid}.lesson-records>div:last-child{border:0}.lesson-records span{color:#46607e}.lesson-records strong{color:#18334f;font-weight:550}.lesson-widget h3{margin:24px 24px 14px;font-size:18px;line-height:1.6}.lesson-options{gap:8px;margin:0 24px;display:grid}.lesson-options button{text-align:left;color:#254462;background:#fff;border:1px solid #c6d7eb;border-radius:9px;align-items:center;gap:14px;min-height:48px;padding:12px 15px;font-size:14px;line-height:1.7;display:flex}.lesson-options button b{color:#1460dc}.lesson-options button:hover{background:#f2f7ff;border-color:#83ade8}.lesson-options button[aria-pressed=true]{background:#e8f2ff;border:2px solid #2770e6;padding:11px 14px}.lesson-options button.correct{color:#134d95;background:#e8f2ff;border-color:#2672e5}.lesson-options button.needs-review{background:#fff8ef;border-color:#b47d30}.lesson-feedback{color:#213e60;background:#f0f6ff;border-left:3px solid #1261ee;border-radius:0 8px 8px 0;margin:17px 24px 0;padding:15px 18px;animation:.2s answerIn}.lesson-feedback p{margin:7px 0 0;font-size:14px;line-height:1.9}.lesson-feedback strong{font-size:15px}.lesson-widget>footer{justify-content:space-between;align-items:center;gap:14px;margin-top:10px;padding:19px 24px;display:flex}.lesson-widget footer small{color:#465e79;font-size:12px}.link-button{color:#145ccd;cursor:pointer;background:0 0;border:0;padding:6px;font-size:13px}.media-audit-tile{border-bottom:1px solid var(--line);padding:20px 0 32px}.media-audit-tile h2{font-size:20px;line-height:1.6}.media-audit-row{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;display:grid}.media-audit-row figure{margin:0}.media-audit-row img{border:1px solid var(--line);border-radius:10px;width:100%;height:auto}.media-audit-row figcaption{color:#425a76;font-size:12px}.media-audit-tile p{font-size:13px;line-height:1.8}.text-only .local-figure,.text-only .card-cover .local-media{display:none}.text-only .card-cover .cover-fallback{display:flex!important}.text-only .source-media{aspect-ratio:auto}.cover-first .cover-wrap{border-color:#cad9ed}.article-title{color:#10203a}.prose{color:#2d435d;font-size:17px;line-height:1.95}.prose h2,.prose h3{color:#122b48}.sources a{overflow-wrap:anywhere}.local-figure img{cursor:zoom-in}.local-figure a{cursor:pointer}@keyframes answerIn{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@media (width<=700px){.local-figure figcaption{font-size:12px;display:block}.local-figure figcaption a{margin-top:3px;display:inline-block}.lesson-widget>header{padding:18px;display:block}.lesson-tag{margin-top:12px;display:inline-block}.lesson-widget header h2{font-size:21px}.lesson-problem{margin:19px 18px;font-size:15px}.lesson-records{margin:0 18px}.lesson-records>div{grid-template-columns:90px 1fr;gap:10px;padding:11px;font-size:13px}.lesson-widget h3{margin:20px 18px 12px;font-size:17px}.lesson-options{margin:0 18px}.lesson-options button{padding:11px 13px;font-size:13px}.lesson-feedback{margin:17px 18px 0}.lesson-widget>footer{align-items:start;padding:18px}.lesson-widget footer small{max-width:215px;font-size:11px}.media-audit-row{grid-template-columns:1fr}.prose{font-size:16px}.card-cover .media-badge{font-size:10px!important}}@media (prefers-reduced-motion:reduce){.cover-first:hover .local-media{transform:none}.lesson-feedback{animation:none}}.card-cover:after{pointer-events:none;background:linear-gradient(#0000 83%,#ddeaff22)!important}.card-author{color:#2d4663}.content-kind{color:#174f9a}.card-reading,.card-end{color:#425c7b}.source-media:has(.local-media){aspect-ratio:auto}.card-cover.fit-cover .local-media{object-fit:cover}.card-cover.fit-contain .local-media{object-fit:contain}.cover-credit{color:#445974;overflow-wrap:anywhere;margin:-5px 0 13px;font-size:11px;line-height:1.7;display:block}.grid.list .guide-card.cover-first{position:relative}.grid.list .cover-credit{grid-area:2/2;margin:0}.grid.list .cover-first .card-body{grid-area:1/2}.grid.list .cover-first .cover-wrap{grid-row:1/3}.review-gate-note{background:#f4f8ff;border:1px solid #b8cce8;border-left:4px solid #1261ee;border-radius:12px;margin:25px 0;padding:22px 26px}.review-gate-note h2{color:#143055;margin:0 0 13px;font-size:21px;line-height:1.5}.review-gate-note p{color:#2e486a;font-size:14px;line-height:1.9}.readiness-badge{color:#674610;background:#fff4de;border:1px solid #c8a76c;border-radius:5px;padding:4px 8px;font-size:11px;display:inline-block}.editorial-table td{min-width:125px;font-size:12px;line-height:1.8}.editorial-table td:nth-child(2){min-width:270px}.editorial-table small{color:#405572;margin-top:5px;font-size:11px;line-height:1.8;display:block}.review-only-note{background:#f2f7fd;border:1px solid #cddcf0;border-radius:8px;padding:15px}.unlinked-reference{color:inherit}.media-audit-row figcaption{margin-top:8px;line-height:1.8}.prose pre{white-space:pre-wrap;overflow-wrap:anywhere}.preview-notice{color:#344964}.cover-credit a{color:#1b5198}@media (width<=600px){.cover-credit{font-size:11px}.review-gate-note{padding:18px}.review-gate-note h2{font-size:19px}.review-gate-note p{font-size:13px}.grid.list .cover-credit{display:none}}:root{--ink:#14263e;--body:#293e56;--muted:#506078;--blue:#125bea;--blue-dark:#0748bc;--sky:#f0f6ff;--line:#d8e2ef;--reading-width:744px;--reading-font:18px;--reading-leading:1.92;--reading-header:98px}html{scroll-padding-top:112px}body{text-rendering:optimizelegibility}.shell{max-width:1280px}::selection{color:#102d57;background:#d7e7ff}.site-header{background:#fff;box-shadow:0 1px #dce6f233}.brand small{letter-spacing:.015em;color:#4b5c73;font-size:11px}.topnav a{font-size:14px;font-weight:600}.btn{box-shadow:none;transition:background .18s,border-color .18s,transform .18s}.btn:active{transform:translateY(1px)}.icon-btn{border-color:#d7e1ee}.catalog-hero{gap:48px;padding-top:46px;padding-bottom:34px}.catalog-hero h1{letter-spacing:-.035em;text-wrap:balance;font-size:clamp(32px,3.2vw,45px);font-weight:740;line-height:1.32}.catalog-hero .hero-deck{color:var(--muted);max-width:580px;font-size:16px;line-height:1.85}.search-form{border-radius:12px;box-shadow:0 4px 16px #13263e04}.search-form input::placeholder{color:#5c6b80}.quick-searches button{color:#3b5270;font-size:12px}.filterbar{padding:15px 0}.filters button{color:#384e68;padding:9px 13px;font-size:14px}.filters button[aria-pressed=true]{color:#084bad}.filter-tools select,.collection-toggles button{color:#3a4f67;font-size:13px}.countline{color:#506078;margin-bottom:23px;font-size:13px}.cover-first{box-shadow:none;border:0;border-radius:0;padding:0}.cover-first:hover{box-shadow:none;border-color:#0000;transform:none}.cover-first .cover-wrap{background:#f6f9fe;border:1px solid #d6e0ec;border-radius:14px}.cover-first .card-cover img{transition:transform .3s}.cover-first:hover .card-cover img{transform:scale(1.018)}.cover-first .cover-credit{color:#53647b;margin:8px 0 0;font-size:11px;line-height:1.65}.cover-first .card-body{gap:0;padding:16px 0 0}.cover-first .card-kinds{margin:0 0 9px}.cover-first .content-kind{color:#205296;background:#eef4fd;border:0;padding:4px 8px;font-size:11px}.cover-first .card-author{color:#314862;margin:0 0 8px;font-size:12px;line-height:1.6}.cover-first .card-reading{color:#506078;margin:0 0 10px;font-size:12px}.cover-first h2{letter-spacing:-.02em;min-height:0;margin:0 0 10px;font-size:21px;font-weight:690;line-height:1.5}.cover-first h2 a{color:#172c49}.cover-first h2 a:hover{color:var(--blue);text-decoration:none}.cover-first .excerpt{color:#40536c;margin:0 0 20px;font-size:14px;line-height:1.85}.cover-first .card-end{color:#53647b;border-top:1px solid #dce5f0;margin-top:auto;padding-top:13px;font-size:12px}.cover-first .card-end a{color:#184e9e;font-weight:620}#guide-grid:not(.list){gap:40px 26px}.grid.list .card-body{padding-top:0}.grid.list .cover-credit{max-width:220px}.article-layout.editorial-layout{grid-template-columns:minmax(0,var(--reading-width)) minmax(220px,270px);justify-content:center;align-items:start;column-gap:62px;display:grid}.main-column{min-width:0}.breadcrumbs{color:#53647b;padding-top:28px;padding-bottom:12px;font-size:12px}.article-title{letter-spacing:-.035em;text-wrap:pretty;margin-top:14px;font-size:clamp(28px,3vw,40px);font-weight:740;line-height:1.42}.deck{color:#465a74;margin-top:16px;font-size:17px;line-height:1.88}.byline{border-bottom:1px solid #e0e7f0;gap:12px;margin:24px 0 16px;padding-bottom:16px}.author strong{color:#213951;font-size:13px}.author small{color:#526178;font-size:12px;line-height:1.8}.reader-tools .icon-btn{width:36px;height:36px}.reading-toolbar{color:#526178;flex-wrap:wrap;align-items:center;gap:8px 14px;margin:0 0 24px;font-size:12px;display:flex}.reading-toolbar-label{color:#526178}.reading-toolbar button{color:#254668;background:#fff;border:1px solid #d3dfef;border-radius:7px;min-height:34px;padding:7px 11px;font-size:12px}.reading-toolbar button:hover{background:#eef5ff}.reading-toolbar button[aria-pressed=true]{color:#0849b0;background:#eaf2ff;border-color:#99bdf5}.reading-toolbar a{color:#215598;font-size:12px}.reading-status{font-variant-numeric:tabular-nums;white-space:nowrap;margin-left:auto}.quick-summary{background:#f2f7ff;border:1px solid #d9e6f8;border-radius:12px;margin:27px 0 32px;padding:23px 25px}.quick-summary h2{letter-spacing:0;margin-bottom:10px;font-size:16px}.quick-summary p{color:#29425e;font-size:16px;line-height:1.85}.quick-summary small{color:#52647b;font-size:12px;line-height:1.75}.prose{font-size:var(--reading-font);line-height:var(--reading-leading);color:var(--body);letter-spacing:.008em;overflow-wrap:break-word}.prose p{margin:0 0 1.2em}.prose h2{letter-spacing:-.02em;color:#162e4b;margin:2.35em 0 1em;padding:0;scroll-margin-top:12px;font-size:25px;font-weight:710;line-height:1.58;position:relative}.prose h2:first-child{margin-top:.7em}.prose h3{color:#1a344f;margin:1.75em 0 .75em;font-size:20px;font-weight:675;line-height:1.65}.prose strong{color:#152e48;font-weight:680}.prose ul,.prose ol{margin:0 0 1.35em;padding-left:1.4em}.prose li{margin:.42em 0;padding-left:.18em}.prose li::marker{color:#2b61aa}.prose blockquote{color:#324a66;background:#f5f8fd;border-left:3px solid #3979e7;border-radius:0 9px 9px 0;margin:28px 0;padding:18px 22px}.prose blockquote p:last-child{margin-bottom:0}.prose a:not(.heading-anchor){text-underline-offset:4px;color:#1454c1;text-decoration:underline 1px #aac4ed}.prose .reference a{color:#1c58bd;text-decoration:none}.prose .reference{margin-left:2px;font-size:11px}.prose small{color:#526178;font-size:13px;line-height:1.8}.heading-anchor{opacity:0;color:#315f99;width:25px;min-height:30px;font-size:17px;font-weight:500;line-height:1.7;text-decoration:none;position:absolute;top:4px;left:-29px}.prose h2:hover .heading-anchor,.heading-anchor:focus-visible{opacity:1}.prose .table-scroll{border:1px solid #d6e1ef;border-radius:10px;margin:28px 0 32px}.prose table{min-width:540px;font-size:14px;line-height:1.85}.prose th{color:#243f5e;background:#f1f6fd;padding:14px 16px}.prose td{color:#324960;padding:15px 16px}.prose tr:nth-child(2n) td{background:#fbfcff}.prompt-box{background:#f6f9fd;border:1px solid #c9d9ed;border-radius:12px;margin:30px 0}.prompt-top{color:#274361;background:#edf4fd;padding:14px 18px;font-size:13px}.prompt-top button{color:#164da0;border-radius:6px;min-height:34px}.prompt-box pre,.prose pre{white-space:pre-wrap;overflow-wrap:anywhere;padding:22px 24px;font-size:14px;line-height:1.9}.source-figure.local-figure{margin:30px 0 38px}.source-figure.hero-media{margin:0 0 27px}.local-figure .source-media{background:#f5f8fd;border-color:#d4e0ee;border-radius:12px}.local-figure img{object-fit:contain}.local-figure figcaption{color:#526178;justify-content:space-between;align-items:start;gap:8px 16px;padding:9px 2px 0;font-size:12px;line-height:1.85;display:flex}.local-figure figcaption span{max-width:86%}.local-figure figcaption a{color:#235897;flex:none;text-decoration-color:#aac4ed}.media-zoom{opacity:.95;color:#205eae;background:#fff}.sidebar{align-self:stretch}.sticky-rail{flex-direction:column;gap:25px;max-height:none;display:flex;position:sticky;top:108px;overflow:visible}.sticky-rail .toc{border-left:1px solid #d9e3f0;order:-1;margin:0;padding-left:17px}.toc h2{color:#213953;margin:0 0 15px;font-size:14px;font-weight:680}.toc nav{scrollbar-width:thin;flex-direction:column;gap:4px;max-height:min(51vh,480px);display:flex;overflow-y:auto}.toc a{color:#51637a;border-radius:6px;padding:7px 9px;font-size:12px;line-height:1.8;transition:color .16s,background .16s}.toc a.active{color:#0c4ba7;background:#edf4ff;font-weight:620}.sidebar-box{background:#f5f8ff;border:1px solid #dbe5f5;border-radius:12px;margin:0;padding:20px}.sidebar-box .eyebrow{color:#47668f;letter-spacing:.08em;font-size:10px}.sidebar-box h2{margin:10px 0;font-size:18px;line-height:1.6}.sidebar-box p{color:#4b617c;font-size:13px;line-height:1.8}.sidebar-box .btn{min-height:40px;box-shadow:none;border-radius:8px;padding:9px 14px;font-size:13px}.related-mini{margin:0}.related-mini h2{margin-bottom:12px;font-size:14px}.related-mini a{color:#355678;font-size:12px;line-height:1.85}.sources{border-top:1px solid #d6e1ed;margin-top:40px;padding-top:32px}.sources h2{margin-bottom:20px;font-size:20px}.sources ol{padding-left:0;list-style:none}.sources li{border-top:1px solid #e1e8f2;padding:14px 0}.sources li strong{color:#2d455f;font-size:12px}.sources li a{color:#235a9f;margin-top:4px;font-size:13px;line-height:1.85}.sources p,.editorial-note{color:#52647a;font-size:12px;line-height:1.85}.lesson-widget{margin-top:40px}.lesson-widget header{background:#f2f7ff}.focus-reading .editorial-layout{grid-template-columns:minmax(0,800px)}.focus-reading .editorial-layout>.sidebar{display:none}.focus-reading .editorial-layout .prose{max-width:var(--reading-width);margin-left:auto;margin-right:auto}.large-text{--reading-font:20px;--reading-leading:1.95}.large-text .prose{font-size:var(--reading-font)}.media-pagination{justify-content:center;align-items:center;gap:22px;padding:11px 16px 2px;display:flex}.media-pagination button{color:#275781;background:#fff;border:1px solid #d3e0f0;border-radius:8px;min-width:42px;min-height:38px;font-size:16px}.media-pagination button:disabled{opacity:.45;cursor:default}.media-pagination output{color:#4b627b;font-variant-numeric:tabular-nums;font-size:12px}#image-dialog .dialog-caption{color:#465c76;font-size:12px;line-height:1.8}.reading-finish{color:#496079;border-top:1px solid #dce5f1;justify-content:space-between;align-items:center;gap:12px;margin-top:25px;padding-top:18px;font-size:13px;display:flex}.reading-finish a{color:#1c54a0;font-weight:600}@media (width>=1024px){.cover-first h2 a{-webkit-line-clamp:2;-webkit-box-orient:vertical;min-height:3em;display:-webkit-box;overflow:hidden}.cover-first .excerpt{-webkit-line-clamp:3;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}}@media (width<=1100px){.article-layout.editorial-layout{grid-template-columns:minmax(0,1fr) 236px;gap:38px}.focus-reading .article-layout.editorial-layout{grid-template-columns:minmax(0,780px)}.prose{font-size:17px}.large-text .prose{font-size:19px}.article-title{font-size:32px}}@media (width<=860px){.article-layout.editorial-layout{display:block}.prose{max-width:744px;margin:auto}.catalog-hero{padding-top:30px;padding-bottom:27px}.catalog-hero h1{font-size:34px}#guide-grid:not(.list){gap:32px 20px}.sidebar{display:none}.reading-toolbar{gap:8px 12px;margin-bottom:21px;font-size:12px}.mobile-toc{background:#fbfcff;border:1px solid #d5e1f0;border-radius:10px;margin:24px 0}.mobile-toc summary{color:#294c72;cursor:pointer;padding:15px 17px;font-size:14px}.mobile-toc a{color:#3a5c80;font-size:13px;line-height:1.85}.heading-anchor{opacity:.7;vertical-align:middle;margin-left:9px;font-size:14px;display:inline-block;position:static}}@media (width<=600px){.shell{padding-left:21px;padding-right:21px}.brand-name{font-size:23px}.catalog-hero h1{letter-spacing:-.035em;font-size:30px}.catalog-hero .hero-deck{font-size:14px;line-height:1.85}.quick-searches button{font-size:12px}.library-tools{gap:14px}.filters button{padding:8px 11px;font-size:13px}.countline{align-items:start;gap:10px;font-size:12px}.countline>span{text-align:right;max-width:118px;line-height:1.65}.cover-first h2{font-size:21px;line-height:1.5}.cover-first .excerpt{font-size:14px;line-height:1.85}.cover-first .card-author{font-size:13px}.cover-first .card-reading{font-size:12px}.cover-first .cover-credit{font-size:11px}.article-title{font-size:28px;line-height:1.48}.deck{font-size:15px;line-height:1.85}.author small{font-size:11px}.byline{margin-bottom:14px;padding-bottom:14px}.reading-toolbar-label{display:none}.reading-toolbar button{padding:7px 9px}.reading-status{font-size:11px}.prose{letter-spacing:.01em;font-size:16px;line-height:1.95}.prose h2{margin-top:2em;margin-bottom:.85em;font-size:22px;line-height:1.65}.prose h3{font-size:18px}.prose small{font-size:12px}.large-text .prose{font-size:18px}.prose blockquote{margin:23px 0;padding:15px 17px}.quick-summary{margin:24px 0;padding:19px 18px}.quick-summary p{font-size:15px}.quick-summary small{font-size:12px}.prompt-box pre,.prose pre{padding:18px;font-size:13px;line-height:1.9}.local-figure figcaption{flex-wrap:wrap;gap:3px;font-size:12px}.local-figure figcaption span{max-width:100%}.source-figure.local-figure{margin:26px 0 31px}.sources h2{font-size:20px}.sources p{font-size:12px}.prose .table-scroll{margin:24px 0}}@media (prefers-reduced-motion:reduce){.cover-first .card-cover img,.heading-anchor,.toc a,.btn{transition:none!important}.cover-first:hover .card-cover img,.btn:active{transform:none}}@media print{.reading-toolbar,.reading-finish,.heading-anchor,.media-pagination{display:none!important}.article-layout.editorial-layout{display:block}.prose{font-size:11pt;line-height:1.75}}.heading-anchor{cursor:pointer;background:0 0;border:0;padding:0}:root{--ink:#11213a;--body:#253951;--muted:#4a5c72}.catalog-hero h1{max-width:650px}.source-first-layout{grid-template-columns:minmax(0,744px) 258px;justify-content:center;align-items:start;gap:58px;margin:40px auto 0;display:grid}.source-reading{min-width:0}.source-reading .article-header{margin:0 0 24px}.source-reading .article-header>.eyebrow{letter-spacing:.065em;color:#245bb9;margin:0 0 16px;font-size:12px;line-height:1.7}.source-reading h1{letter-spacing:-.035em;color:var(--ink);text-wrap:balance;margin:0 0 20px;font-size:clamp(30px,3.3vw,42px);font-weight:740;line-height:1.43}.source-reading .article-deck{color:#425670;max-width:700px;margin:0 0 20px;font-size:17px;line-height:1.85}.source-origin-line{color:#4e6077;flex-wrap:wrap;align-items:center;gap:10px;margin:22px 0 18px;font-size:12px;line-height:1.8;display:flex}.source-origin-line>span{color:#235bb5;background:#f4f8ff;border:1px solid #dce7f7;border-radius:5px;padding:3px 8px}.source-origin-line>a{color:#263e60;font-weight:650}.source-origin-line time{border-left:1px solid #dce5f1;padding-left:5px}.source-reading .reading-toolbar{border-top:1px solid #dce5f1;border-bottom:0;flex-wrap:wrap;align-items:center;gap:10px;min-height:52px;margin:0 0 22px;padding:12px 0 0;display:flex}.source-reading .reading-toolbar button{color:#304c73;background:#fff;border:1px solid #d5e2f3;border-radius:7px;min-height:34px;padding:7px 10px;font-size:12px}.source-reading .reading-toolbar button:hover{color:#125bea;background:#eff5ff}.source-reading .reading-toolbar button[aria-pressed=true]{color:#0b50c9;background:#eaf2ff;border-color:#a3c1f1}.source-reading .reading-status{color:#53657b;margin-left:auto;font-size:12px}.original-figure{margin:25px 0 35px}.original-figure.hero-media{margin:0 0 30px}.original-figure .source-natural{aspect-ratio:auto;background:#f7f9fc;border:1px solid #dce5ef;border-radius:13px;min-height:0;max-height:none;position:relative;overflow:hidden}.original-figure .source-natural>img{opacity:0;background:#f7f9fc;width:100%;min-height:0;max-height:720px;display:block;object-fit:contain!important;height:auto!important;position:relative!important;inset:auto!important}.original-figure .source-natural.loaded>img{opacity:1}.original-figure .source-natural:not(.loaded){min-height:210px}.original-figure .source-natural:not(.loaded)>img{height:0!important}.original-figure .source-natural.failed{min-height:110px}.source-image-placeholder{color:#465e7a;flex-direction:column;justify-content:center;align-items:center;gap:12px;min-height:210px;padding:25px;font-size:13px;display:flex}.source-image-placeholder .source-platform{color:#2f5faa;font-size:12px}.source-natural.loaded .source-image-placeholder{display:none}.source-natural.failed .source-image-placeholder{min-height:110px}.original-figure .media-zoom{color:#24486e;background:#fffffff5;border:1px solid #cedced;border-radius:8px;justify-content:center;align-items:center;width:36px;height:36px;display:flex;position:absolute;bottom:12px;right:12px;box-shadow:0 2px 10px #1833550b}.original-figure figcaption{color:#52627a;margin-top:9px;font-size:12px;line-height:1.8;display:block}.original-figure figcaption a{color:#52627a;text-decoration:none}.original-figure figcaption a:hover{text-decoration:underline}.source-reading .prose{color:#253951;letter-spacing:.002em;font-size:18px;line-height:1.92}.source-reading .prose>p{margin:19px 0}.source-reading .prose>p:first-child{font-size:18px;line-height:1.9}.source-reading .prose h2{color:#14263e;letter-spacing:-.018em;margin:39px 0 19px;scroll-margin-top:0;font-size:25px;line-height:1.6}.source-reading .prose h3{margin:27px 0 15px;font-size:20px}.source-reading .prose p strong{font-weight:650}.source-reading .prose a{overflow-wrap:anywhere}.article-sidebar{border-left:1px solid #e0e7f1;align-self:stretch;min-width:0;padding-left:22px}.article-sidebar .sidebar-sticky{scrollbar-width:thin;scrollbar-color:#cbd8e9 transparent;max-height:calc(100vh - 140px);padding-right:8px;position:sticky;top:110px;overflow-y:auto}.article-sidebar .toc-box{border:0;margin:0;padding:0}.article-sidebar h2{color:#203954;margin:0 0 16px;font-size:15px}.article-sidebar .toc{flex-direction:column;gap:5px;display:flex}.article-sidebar .toc a{color:#506079;border-radius:7px;padding:8px 10px;font-size:13px;line-height:1.8}.article-sidebar .toc a.active{color:#1457c8;background:#eef4ff}.sidebar-source{background:#f6f9ff;border:1px solid #e1e9f5;border-radius:10px;margin-top:30px;padding:20px 18px}.sidebar-source h3{margin:12px 0 8px;font-size:16px}.sidebar-source p{color:#4a5f79;font-size:12px;line-height:1.85}.sidebar-source a{font-size:12px}.related-note{margin:28px 0}.related-note h3{font-size:14px}.related-note>a{color:#314c6b;border-bottom:1px solid #e5ebf4;padding:13px 0;font-size:13px;line-height:1.8;display:block}.source-reading .compact-sources{border-top:1px solid #d9e5f3;margin-top:30px;padding-top:24px}.compact-sources h2{margin-top:0;font-size:17px!important}.compact-sources ol{margin:14px 0;padding:0;list-style:none}.compact-sources li{border-bottom:1px solid #edf1f8;padding:11px 0;font-size:12px;line-height:1.8}.compact-sources li strong{color:#344965;font-size:12px;display:block}.compact-sources li a{color:#446488;overflow-wrap:anywhere;font-size:12px}.compact-sources>p{color:#53657b;font-size:12px;line-height:1.85}.source-post-fold,.companion-fold{background:#fff;border:1px solid #dce5f1;border-radius:10px;margin:28px 0}.source-post-fold>summary,.companion-fold>summary{cursor:pointer;color:#37567a;padding:15px 18px;font-size:13px;line-height:1.6}.source-post-fold>summary>span{float:right}.source-post-fold .original-post{margin:0;padding:0 14px 14px}.source-post-fold .source-embed-heading,.source-post-fold .media-boundary{display:none}.source-post-fold .tweet-box{background:#f8faff;border:0}.no-source-note{color:#53657b;border-left:2px solid #cedff8;margin:25px 0;padding-left:12px;font-size:12px;line-height:1.85}.original-video-inline{margin:0 0 30px}.original-video-inline .video-shell{aspect-ratio:16/9;background:#f1f5fc;width:100%;min-height:0;position:relative;overflow:hidden}.original-video-inline .video-shell iframe,.original-video-inline .video-shell video{border:0;border-radius:12px;width:100%;height:100%;position:absolute;inset:0}.original-video-inline .video-message{color:#425d7e;justify-content:center;align-items:center;font-size:13px;display:flex;position:absolute;inset:0}.original-video-inline .media-credit{color:#526580;font-size:12px;line-height:1.85}.guide-card.has-source-cover .card-cover{aspect-ratio:16/10;background:#f4f7fb;border-radius:13px}.guide-card.has-source-cover .card-cover img{object-position:center}.guide-card.has-source-cover .cover-fallback{background:#f5f8fd;padding:24px}.guide-card.has-source-cover .cover-fallback strong{letter-spacing:-.02em;font-size:21px;line-height:1.65}.guide-card.has-source-cover .cover-fallback .cover-status{color:#53657b;font-size:11px}.guide-card.has-source-cover .card-author{font-size:13px}.guide-card.no-source-cover{box-shadow:none;border:1px solid #e0e7f1;border-radius:11px;align-self:start;padding:21px}.guide-card.no-source-cover .card-body{padding:0!important}.guide-card.no-source-cover .card-body>h2{font-size:20px;line-height:1.6}.guide-card.no-source-cover .card-kinds{margin-top:0}.guide-card.no-source-cover .excerpt{font-size:14px}.grid.list .guide-card.has-source-cover{grid-template-columns:235px minmax(0,1fr);gap:20px;display:grid}.grid.list .guide-card.has-source-cover .cover-credit{display:none}.grid.list .guide-card.no-source-cover{grid-column:1/-1}.focus-reading .source-first-layout{grid-template-columns:minmax(0,800px)}.focus-reading .source-first-layout>.article-sidebar{display:none}.focus-reading .source-reading .prose{max-width:744px;margin:0 auto}.large-text .source-reading .prose{font-size:20px}.source-asset-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;margin-bottom:60px;display:grid}.source-asset-tile{border:1px solid #d8e4f3;border-radius:13px;min-width:0;padding:22px}.source-asset-tile h2{margin-top:0;font-size:18px;line-height:1.6}.source-asset-tile .original-figure{margin:18px 0}.source-asset-tile .source-natural.loaded>img{max-height:280px}.asset-state{color:#495f7c;font-size:12px;line-height:1.8}.asset-actions{flex-wrap:wrap;align-items:center;gap:12px;margin:25px 0 10px;display:flex}.asset-actions output{color:#315784;font-size:13px}.file-import{color:#3260a1;cursor:pointer;border:1px solid #cfdef0;border-radius:7px;margin:10px 0 0;padding:11px;font-size:12px;line-height:1.5;display:inline-flex;position:relative}.file-import input{opacity:0;cursor:pointer;width:100%;position:absolute;inset:0}.cache-scope-note{max-width:820px;color:#536780!important;font-size:13px!important;line-height:1.85!important}.source-first-layout .editorial-note{color:#5b6b80;font-size:11px;line-height:1.8}@media (width<=1120px){.source-first-layout{grid-template-columns:minmax(0,1fr) 235px;gap:35px}.source-reading h1{font-size:35px}.source-reading .article-deck{font-size:16px}}@media (width<=860px){.source-first-layout{margin-top:26px;display:block}.article-sidebar{display:none}.source-reading h1{max-width:720px;font-size:31px}.source-reading .prose{font-size:17px}.source-asset-grid{grid-template-columns:1fr}.original-figure .source-natural>img{max-height:700px}}@media (width<=520px){.source-first-layout{margin-top:24px}.source-reading h1{letter-spacing:-.02em;font-size:28px;line-height:1.5}.source-reading .article-deck{font-size:15px;line-height:1.85}.source-origin-line{gap:8px;font-size:11px}.source-reading .prose,.source-reading .prose>p:first-child{font-size:16px;line-height:1.95}.source-reading .prose h2{margin-top:30px;font-size:21px}.source-reading .reading-toolbar{gap:7px}.source-reading .reading-toolbar button{padding:6px 8px;font-size:11px}.source-reading .reading-status{font-size:11px}.original-figure figcaption{font-size:12px}.source-reading .mobile-toc{margin:22px 0}.original-figure .source-natural>img{max-height:560px}.grid.list .guide-card.has-source-cover{grid-template-columns:115px minmax(0,1fr);gap:13px}.source-asset-tile{padding:16px}.guide-card.no-source-cover .card-body>h2{font-size:19px}.asset-actions{flex-direction:column;align-items:stretch}.source-reading .reading-toolbar{margin-bottom:15px}.source-reading .article-header{margin-bottom:20px}.large-text .source-reading .prose{font-size:18px}}@media (prefers-reduced-motion:reduce){.source-reading *{scroll-behavior:auto!important;transition:none!important}}@media print{.source-first-layout{display:block}.article-sidebar,.source-post-fold,.reading-toolbar,.source-asset-grid{display:none!important}.source-reading .prose{font-size:11pt}.original-figure{break-inside:avoid}}.source-reading h1{text-wrap:balance;max-width:100%}main>.breadcrumb{color:#5a6b81;align-items:center;gap:10px;margin:28px 0 0;padding:0;font-size:12px;line-height:1.8;display:flex}main>.breadcrumb a{color:#52667f}.original-figure.body-figure{width:min(100%,var(--source-native-width,744px));margin-left:auto;margin-right:auto}@media (width<=520px){main>.breadcrumb{gap:7px;margin-top:20px;font-size:11px}.source-reading h1{font-size:27px}.source-first-layout{margin-top:25px}}.source-reading .editor-note{color:#2d445f;background:#f6f9ff;border-left:3px solid #4178dc;border-radius:0 9px 9px 0;margin:20px 0 26px;padding:14px 18px;font-size:15px;line-height:1.9}.source-reading .editor-note>span{letter-spacing:.025em;color:#29569b;margin-bottom:6px;font-size:12px;font-weight:650;display:block}.source-reading .editor-note p{font-size:inherit;line-height:inherit;margin:0}.source-code-block{background:#f8faff;border:1px solid #d6e2f2;border-radius:11px;margin:23px 0;overflow:hidden}.source-code-toolbar{color:#354d6a;background:#eef4fc;border-bottom:1px solid #d6e2f2;justify-content:space-between;align-items:center;gap:15px;padding:11px 16px;font-size:12px;display:flex}.source-code-toolbar button{color:#174fba;cursor:pointer;background:#fff;border:1px solid #afc6e7;border-radius:6px;min-height:34px;padding:7px 12px;font-size:12px}.source-reading .source-code-block pre{white-space:pre-wrap;overflow-wrap:anywhere;color:#233c58;background:0 0;border:0;border-radius:0;margin:0;padding:22px;font-size:14px;line-height:1.85}.source-reading .source-code-block code{white-space:pre-wrap;overflow-wrap:anywhere}.source-gallery{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:18px 20px;margin:25px 0 32px;display:grid}.source-gallery .original-figure.body-figure{width:100%;margin:0}.source-gallery .original-figure .source-natural>img{max-height:580px}.source-gallery .original-figure figcaption{color:#415874;font-size:12px;line-height:1.7}.original-figure .source-natural.failed,.source-natural.failed .source-image-placeholder{min-height:74px}.source-natural.failed .source-image-placeholder{gap:6px;padding:14px 18px;font-size:12px}.source-natural .source-retry{color:#2256a5;cursor:pointer;background:#fff;border:1px solid #cbd9ec;border-radius:6px;margin-top:3px;padding:6px 12px;font-size:12px}.source-natural:not(.failed) .source-retry{display:none}.source-gallery .source-image-placeholder{gap:8px;min-height:145px;font-size:12px}.source-gallery .source-natural:not(.loaded):not(.failed){min-height:145px}.article-credit-note{color:#41556d;border-top:1px solid #dce6f3;flex-wrap:wrap;align-items:center;gap:10px;margin:35px 0 20px;padding:20px 0;font-size:13px;display:flex}.article-credit-note>span{color:#53647b;font-size:12px}.article-credit-note>a{color:#254f89;font-weight:650}.article-credit-note>small{color:#465b76;flex-basis:100%;font-size:12px;line-height:1.85;display:block}.source-reading .reading-toolbar button,.source-retry,.source-code-toolbar button{transition:background .16s,border-color .16s}.source-code-toolbar button:hover,.source-retry:hover{background:#eef5ff;border-color:#89ace0}.source-asset-tile .asset-role{color:#245db2;background:#eaf2ff;border-radius:4px;padding:4px 7px;font-size:11px}.source-reading .original-figure figcaption a:focus-visible{outline-offset:3px;outline:2px solid #1261ee}@media (width<=600px){.source-gallery{grid-template-columns:1fr;gap:20px}.source-reading .editor-note{padding:13px 15px;font-size:14px}.source-code-toolbar{padding:10px 13px}.source-reading .source-code-block pre{padding:17px;font-size:13px}}@media (prefers-reduced-motion:reduce){.source-retry,.source-code-toolbar button{transition:none}}@media print{.source-code-toolbar button,.source-retry{display:none}.source-gallery{display:block}.source-gallery figure{break-inside:avoid;margin:18px 0!important}.editor-note{break-inside:avoid}}.source-reading .original-figure .source-natural,.source-asset-tile .original-figure .source-natural{height:auto!important}.source-reading .source-gallery .source-natural.failed,.source-reading .source-gallery .source-natural.failed .source-image-placeholder{min-height:74px}.original-figure .source-natural.failed:after{content:none;min-height:0;display:none}.original-figure .source-natural.failed{aspect-ratio:auto!important}.feature-strip{grid-template-columns:repeat(3,minmax(0,1fr))}.feature-item strong{color:var(--ink);margin-bottom:7px;font-size:20px;line-height:1.4;display:block}.feature-item span{color:var(--muted);font-size:12px;line-height:1.6}.source-reading .article-title{letter-spacing:-1.1px;margin:14px 0 16px;font-size:38px;font-weight:750;line-height:1.45}.article-header .hero-media img{max-width:100%}@media (width<=760px){.feature-strip{grid-template-columns:1fr;gap:10px}.source-reading .article-title{font-size:30px;line-height:1.48}}