/* AIFERS case reader: editorial teaching, rather than an input-first workspace. */
.case-study{--cs-paper:#f7f7f1;--cs-ink:#233e33;--cs-muted:#6e796f;--cs-line:#dcded2;--cs-green:#214e43;--cs-sand:#c48755;--cs-negative:#a85b39;background:var(--cs-paper);color:var(--cs-ink);font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75;min-height:100vh;font-size:14px}
.case-study *{box-sizing:border-box}.case-study button,.case-study input{font:inherit}.case-study button{cursor:pointer}.case-study a{color:inherit}.case-study h1,.case-study h2,.case-study h3,.case-study p{margin:0}.case-study button:focus-visible,.case-study a:focus-visible,.case-study input:focus-visible,.case-study summary:focus-visible,.cs-table-scroll:focus-visible{outline:3px solid #c48755;outline-offset:5px}.case-study section:focus{outline:none}
.cs-header{height:82px;position:sticky;top:0;z-index:25;display:flex;align-items:center;justify-content:space-between;padding:0 42px;border-bottom:1px solid var(--cs-line);background:#f7f7f1f5;backdrop-filter:blur(16px);gap:20px}.cs-brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex-shrink:0}.cs-brand-mark{font-size:40px;font-weight:700;line-height:1;letter-spacing:-4px;color:var(--cs-green);margin-right:3px}.cs-brand strong{font-size:15px;font-weight:650;letter-spacing:2px;line-height:1.4}.cs-brand small{display:block;font-size:8px;font-weight:500;letter-spacing:2.8px;color:var(--cs-muted);margin-top:2px}.cs-header-caption{font-size:12px;color:var(--cs-muted);letter-spacing:1px;margin-left:auto;margin-right:36px}.cs-header-actions{display:flex;align-items:center;gap:25px}.cs-text-button{background:none;border:none;color:var(--cs-ink);font-size:12px!important}.cs-text-button span{margin-left:10px}.cs-account{border:1px solid var(--cs-line);border-radius:30px;padding:5px 13px;background:transparent;color:var(--cs-muted);font-size:11px!important;max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cs-rail{position:fixed;left:0;top:82px;bottom:0;width:218px;border-right:1px solid var(--cs-line);padding:38px 25px 25px 29px;overflow-y:auto;background:var(--cs-paper);display:flex;flex-direction:column}.cs-rail-label{font-size:10px;letter-spacing:2px;color:#8a9285;margin:0 8px 19px}.cs-rail nav{display:flex;flex-direction:column;gap:7px}.cs-rail nav button{display:flex;align-items:center;gap:12px;border:0;border-radius:4px;background:none;color:#738073;text-align:left;font-size:12px;padding:10px 7px;line-height:1.5}.cs-rail nav button span{font-size:10px;color:#959c8d;font-variant-numeric:tabular-nums}.cs-rail nav button:hover{color:var(--cs-ink);background:#e9ede2}.cs-rail nav button.active{color:var(--cs-ink);background:#e6ebdd;font-weight:650}.cs-rail nav button.active span{color:var(--cs-green)}.cs-rail-note{margin-top:auto;padding:60px 8px 0;color:#6d776c;font-size:10px}.cs-status-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#75966c;margin-right:5px}.cs-rail-note p{font-size:13px;margin-top:12px;line-height:1.8}.cs-rail-note button{background:none;border:0;padding:14px 0 0;font-size:11px;color:var(--cs-ink)}
.cs-main{margin-left:218px;max-width:1600px;padding:0 54px;outline:0}.cs-hero{display:grid;grid-template-columns:1fr 1.05fr;gap:38px;align-items:center;padding:66px 0 56px;scroll-margin-top:95px}.cs-kicker{font-size:10px;font-weight:650;letter-spacing:2.3px;color:var(--cs-muted);display:block;text-transform:uppercase}.cs-hero h1{font-size:clamp(30px,3.35vw,56px);font-weight:500;letter-spacing:-1.8px;line-height:1.45;margin-top:20px}.cs-hero h1 em{font-style:normal;color:#7a896b}.cs-hero-lead{font-size:14px;line-height:2.0;color:var(--cs-muted);margin-top:21px!important}.cs-hero-meta{display:flex;gap:7px;flex-wrap:wrap;margin-top:24px;margin-bottom:28px}.cs-chip{display:inline-flex;align-items:center;padding:3px 9px;background:#e9eddf;color:#54694c;border-radius:3px;font-size:10px;line-height:1.8;letter-spacing:.3px}.cs-chip-muted{background:#eeede5;color:#7c7c70}.cs-chip-sand{background:#f0e6d5;color:#956c46}.cs-button{display:inline-flex;justify-content:center;align-items:center;gap:30px;min-height:44px;border:1px solid var(--cs-green);background:var(--cs-green);color:#fff;padding:12px 20px;font-size:12px!important;border-radius:3px;line-height:1.5;text-decoration:none}.cs-button:hover{background:#316151}.cs-button span{font-size:16px}.cs-button-outline{background:transparent;color:var(--cs-green);border-color:#bcc6b4}.cs-button-outline:hover{background:#e7ecdf}.cs-button:disabled{cursor:not-allowed;opacity:.45}
.cs-hero-image{position:relative;margin:0;min-width:0}.cs-hero-image img{display:block;width:100%;height:365px;object-fit:cover;border-radius:120px 5px 5px 5px;background:#e7e8dc}.cs-hero-image figcaption{font-size:9px;text-align:right;color:#8a8d7c;margin-top:10px}.cs-image-label{position:absolute;bottom:50px;left:25px;color:#fff;font-size:11px;font-weight:600;letter-spacing:2.5px;line-height:1.5;text-shadow:0 1px 9px #0008}.cs-overview-band{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--cs-line);border-bottom:1px solid var(--cs-line);padding:27px 0;gap:18px}.cs-overview-band>div{border-left:1px solid var(--cs-line);padding-left:24px}.cs-overview-band>div:first-child{padding-left:0;border-left:0}.cs-overview-band>div>span{font-size:11px;color:var(--cs-muted)}.cs-overview-band strong{display:block;font-weight:500;font-size:29px;letter-spacing:-1px;margin-top:5px;line-height:1.4;font-variant-numeric:tabular-nums}.cs-overview-band small{font-size:10px;letter-spacing:0;font-weight:400;margin-left:8px;color:var(--cs-muted)}.cs-data-note{font-size:10px;line-height:1.9;color:#929788;padding:16px 0 27px}.cs-negative{color:var(--cs-negative)!important}.cs-positive{color:var(--cs-green)!important}.cs-route-strip{display:flex;align-items:center;justify-content:space-between;background:#e9eddf;padding:22px 25px;gap:12px;font-size:10px;color:#819076;border-radius:3px}.cs-route-strip span{display:flex;flex-direction:column;gap:3px}.cs-route-strip b{font-size:13px;font-weight:550;color:var(--cs-ink)}.cs-route-strip i{font-style:normal;color:#a0aa94}
.cs-section{padding:88px 0 0;scroll-margin-top:85px}.cs-section-heading{display:flex;gap:23px;align-items:flex-start;margin-bottom:33px;max-width:830px}.cs-section-no{font-size:15px;color:#8a977d;border-top:1px solid #9daa8e;width:39px;flex-shrink:0;padding-top:10px;margin-top:7px}.cs-section-heading h2{font-size:29px;line-height:1.5;font-weight:500;letter-spacing:-.7px;margin:10px 0 13px}.cs-section-heading p{color:var(--cs-muted);font-size:13px;line-height:1.9;max-width:700px}.cs-economics-grid{display:grid;grid-template-columns:1fr 255px;border:1px solid var(--cs-line);background:#fcfcf8;border-radius:4px;overflow:hidden}.cs-chart{margin:0;background:#fcfcf8;border:1px solid var(--cs-line);border-radius:4px;padding:27px 25px 18px;min-width:0}.cs-chart figcaption{font-size:13px;font-weight:550;margin-bottom:19px;letter-spacing:.3px}.cs-economics-grid .cs-chart{border:0;border-right:1px solid var(--cs-line);border-radius:0}.cs-plot{display:block;width:100%;height:auto;overflow:visible;font-family:inherit}.cs-plot text{font-family:inherit;font-size:11px;fill:#788271;font-variant-numeric:tabular-nums}.cs-plot .cs-plot-value{font-size:15px;fill:var(--cs-ink);font-weight:600}.cs-gridline{stroke:#e5e8db;stroke-width:1}.cs-chart-caption,.cs-caption{font-size:10px;line-height:1.9;color:#8b9282}.cs-chart-caption{margin-top:15px!important}.cs-margin-note{padding:28px 27px;background:#edf0e6}.cs-margin-note>strong{font-size:39px;font-weight:450;letter-spacing:-1px;display:block;margin:9px 0}.cs-margin-note p{font-size:11px;color:#77836e}.cs-margin-note>span:not(.cs-kicker){font-size:11px;display:block;color:#6d7e65}.cs-margin-note b{display:block;font-size:27px;line-height:1.6;font-weight:500}.cs-margin-note small{font-size:10px;color:#77836e}.cs-margin-divider{border-top:1px solid #d3dbc7;margin:23px 0 20px}.cs-return-math{display:flex;align-items:center;justify-content:space-around;gap:10px;margin:22px 0 10px;padding:20px;background:#efeadd;border-radius:4px;text-align:center}.cs-return-math div{display:flex;flex-direction:column;gap:3px}.cs-return-math b{font-size:15px;font-weight:500}.cs-return-math span{font-size:10px;color:#8b846e}.cs-return-math i{font-style:normal;color:#afa38b;font-size:22px}.cs-actions{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;padding:31px 0 4px}.cs-actions article{position:relative;padding:0 8px 0 0}.cs-actions article>span{font-size:10px;color:#96a18a;letter-spacing:1px}.cs-actions h3{font-size:14px;font-weight:550;margin:7px 0 10px}.cs-actions p{font-size:12px;line-height:1.95;color:var(--cs-muted)}.cs-takeaway{display:flex;align-items:flex-start;gap:25px;border-top:1px solid var(--cs-line);border-bottom:1px solid var(--cs-line);padding:21px 0;margin:29px 0 17px}.cs-takeaway>span{flex-shrink:0;color:#9d754e;letter-spacing:1px;font-size:10px;padding-top:4px}.cs-takeaway>p{font-size:13px;color:#4b604c;line-height:1.9}.cs-details{font-size:11px;color:var(--cs-muted);margin-top:17px}.cs-details summary{cursor:pointer;list-style-position:inside;padding:12px 0;color:#5b7059;font-size:11px;letter-spacing:.3px}.cs-details[open]{padding-bottom:10px}.cs-details p{font-size:11px;margin:14px 0;line-height:1.95}.cs-table-scroll{overflow:auto;border:1px solid var(--cs-line);max-width:100%;border-radius:3px;background:#fcfcf8}.cs-table-scroll table{border-collapse:collapse;width:100%;font-size:11px;text-align:left;font-variant-numeric:tabular-nums;white-space:nowrap}.cs-table-scroll th,.cs-table-scroll td{padding:12px 14px;border-bottom:1px solid #e4e7db;font-weight:400}.cs-table-scroll thead{background:#e9ede2;color:#57704f}.cs-table-scroll tbody tr:last-child>*{border-bottom:0}
.cs-prelaunch-split{display:grid;grid-template-columns:1fr 1fr;gap:42px;align-items:start}.cs-display-small{font-size:27px!important;line-height:1.6;font-weight:450;letter-spacing:-.5px;margin:6px 0 16px!important}.cs-prelaunch-split>div>p:not(.cs-caption){font-size:12px;line-height:2;color:var(--cs-muted);max-width:470px}.cs-photo-plan{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:25px 0 14px}.cs-photo-plan>span{display:flex;flex-direction:column;justify-content:center;align-items:center;aspect-ratio:1;background:#e9eddf;border:1px solid #e0e4d7;font-size:10px;gap:8px}.cs-photo-plan b{font-size:17px;font-weight:400;color:#8c9e7b}.cs-stock-demo{padding:25px;background:#ede6d6;border-radius:4px}.cs-stock-demo h3{font-size:17px;font-weight:500;line-height:1.7;margin-top:16px!important}.cs-stock-demo>p{font-size:11px!important;color:#827960!important;margin-top:9px!important}.cs-stock-grid{display:grid;grid-template-columns:1.45fr repeat(4,1fr);gap:6px;text-align:center;margin-top:24px;align-items:stretch;font-size:10px}.cs-stock-grid>*{padding:10px 3px;display:flex;align-items:center;justify-content:center}.cs-stock-grid b{font-weight:500}.cs-stock-ok{background:#d7dfc7;border:1px solid #cbd4b9;color:#597146}.cs-stock-zero{background:#c87d59;color:white;border:1px solid #bd6c46}
.cs-keyword-tree{border-top:1px solid var(--cs-line);border-bottom:1px solid var(--cs-line);margin-bottom:12px}.cs-keyword-tree article{display:grid;grid-template-columns:55px 1fr 210px;gap:18px;align-items:center;padding:18px 22px;border-bottom:1px solid #e4e7da}.cs-keyword-tree article:last-child{border:0}.cs-keyword-tree article:nth-child(3){background:#e9eddf}.cs-keyword-tree article>span{font-size:12px;color:#8a9a7e}.cs-keyword-tree h3{font-size:13px;font-weight:550}.cs-keyword-tree p{font-size:11px;line-height:1.8;color:#7e8776;margin-top:3px}.cs-keyword-tree small{font-size:11px;color:#62765a}.cs-keyword-tree+.cs-caption{margin-bottom:25px}.cs-legend{display:flex;align-items:center;justify-content:flex-start;gap:14px 22px;flex-wrap:wrap;font-size:10px;color:#7b8872;margin:8px 0 20px}.cs-legend span{display:inline-flex;gap:7px;align-items:center}.cs-legend i{display:inline-block;width:9px;height:9px;border-radius:2px}.cs-legend i.cs-dashed{background:repeating-linear-gradient(90deg,#9eaa9f 0 4px,transparent 4px 7px);width:18px;height:2px}.cs-budget-rows{display:flex;flex-direction:column;gap:16px}.cs-budget-row{display:grid;grid-template-columns:120px 1fr;align-items:center;gap:18px;font-size:11px;color:#708169}.cs-budget-bar{display:flex;height:28px;overflow:hidden;border-radius:2px}.cs-budget-bar span{display:flex;align-items:center;justify-content:center;font-size:9px;line-height:1;font-variant-numeric:tabular-nums}.cs-period-picker{display:grid;grid-template-columns:repeat(12,1fr);gap:5px;margin-top:27px}.cs-period-picker button{background:#eef0e6;border:1px solid transparent;color:#78876d;border-radius:3px;padding:9px 3px;font-size:12px}.cs-period-picker button small{display:block;font-size:8px;opacity:.65}.cs-period-picker button[aria-pressed=true]{background:var(--cs-green);color:#fff}.cs-period-picker button:hover{border-color:#91a484}.cs-period-readout{display:grid;grid-template-columns:1fr 320px;gap:38px;padding:28px;background:#e8eddf;margin-top:12px;border-radius:4px;min-height:195px}.cs-period-readout h3{font-size:22px;font-weight:500;margin:7px 0 12px}.cs-period-readout p{font-size:12px;color:#6e8063;line-height:1.95}.cs-period-readout dl{display:grid;grid-template-columns:1fr 1fr;gap:13px 20px;margin:0;border-left:1px solid #ccd6bf;padding-left:28px;align-items:center}.cs-period-readout dt{font-size:10px;color:#8a957b}.cs-period-readout dd{font-size:21px;font-weight:450;margin:0;color:#294f3d;font-variant-numeric:tabular-nums}
.cs-turning-point{background:#234d40;padding:35px 38px;color:#f1f2df;border-radius:4px;margin-bottom:22px;position:relative;overflow:hidden}.cs-turning-point:after{content:'W8';position:absolute;right:24px;top:5px;font-size:120px;color:#ffffff09;letter-spacing:-8px;line-height:1.2}.cs-turning-point>span{font-size:10px;letter-spacing:2px;color:#a5bb91}.cs-turning-point h3{font-size:29px;font-weight:400;letter-spacing:-.7px;line-height:1.6;margin:15px 0 12px}.cs-turning-point p{font-size:11px;color:#aebfad}.cs-checkpoints{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;margin-top:29px}.cs-checkpoints article{padding:23px 0;border-top:2px solid #a9b89a}.cs-checkpoints article>span{font-size:11px;letter-spacing:2px;color:#879a76}.cs-checkpoints h3{font-size:17px;font-weight:500;line-height:1.7;margin:13px 0 17px}.cs-check-number{font-size:27px;color:var(--cs-negative);font-weight:450;letter-spacing:-.5px;font-variant-numeric:tabular-nums}.cs-check-number small{display:block;font-size:9px;color:#8a9380;letter-spacing:0}.cs-checkpoints ul{padding-left:16px;line-height:1.9;font-size:11px;color:#6b7c61;margin-top:20px}.cs-checkpoints li{padding-bottom:7px}.cs-checkpoints .cs-caption{border-top:1px solid var(--cs-line);padding-top:13px}.cs-season-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.cs-season-grid article{padding:28px 25px;background:#e9eddf;min-width:0;border-radius:3px}.cs-season-grid article:nth-child(2){background:#ede7da}.cs-season-grid article:nth-child(3){background:#e3e8e0}.cs-season-grid article>span{font-size:9px;letter-spacing:1.3px;color:#8a9479}.cs-season-grid h3{font-size:22px;font-weight:450;margin:17px 0;line-height:1.6;letter-spacing:-.5px}.cs-season-grid p{font-size:12px;line-height:2;color:#6b7c63}.cs-season-grid small{font-size:9px;line-height:1.9;display:block;border-top:1px solid #d0d8c4;margin-top:24px;padding-top:17px;color:#8b957e}
.cs-lab{display:grid;grid-template-columns:260px 1fr;background:#fcfcf8;border:1px solid var(--cs-line);border-radius:4px;overflow:hidden}.cs-lab-controls{padding:29px;background:#e9eddf;border-right:1px solid var(--cs-line);display:flex;flex-direction:column;gap:23px}.cs-lab-controls label{display:block;font-size:11px;color:#617656}.cs-lab-controls output{float:right;font-size:11px;color:#294e39;font-variant-numeric:tabular-nums}.cs-lab-controls input{display:block;width:100%;accent-color:#37674b;margin:16px 0 6px;cursor:pointer;min-height:20px}.cs-lab-controls label>span{font-size:9px;color:#99a28c}.cs-lab-controls .cs-button{font-size:10px!important;margin-top:4px;padding:10px;gap:10px;min-height:36px}.cs-lab-result{padding:29px 27px 24px;min-width:0}.cs-lab-comparison{display:flex;gap:35px;margin:19px 0 13px}.cs-lab-comparison>div{min-width:0}.cs-lab-comparison span{font-size:10px;color:#8b9580;display:block}.cs-lab-comparison strong{font-size:29px;font-weight:450;letter-spacing:-.7px;display:block;margin-top:5px;line-height:1.4;font-variant-numeric:tabular-nums}.cs-lab-comparison>div:first-child strong{color:#9b9f91}.cs-delta{font-size:11px;color:#596e4f;line-height:1.9}.cs-delta span{color:#97a08c;font-size:10px}.cs-lab-result .cs-plot{margin-top:22px}.cs-lab-result .cs-legend{justify-content:center;margin-bottom:17px}.cs-lab-insight{font-size:11px;line-height:1.9;background:#f0f1e8;padding:14px 17px;color:#77826a;border-radius:3px}.cs-lab-toolbar{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-top:17px}.cs-lab-toolbar p{font-size:10px;color:#939b87}.cs-lab-toolbar .cs-button{font-size:10px!important;min-height:34px;padding:9px 13px}.cs-error{color:#a55338;background:#f8e9da;padding:25px}.cs-execution{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-top:65px;padding:37px;background:#e7ebdd;border-radius:4px;align-items:center}.cs-execution h3{font-size:23px;font-weight:450;margin-top:13px;line-height:1.65}.cs-execution ol{font-size:12px;color:#6e7c62;line-height:2.3;margin:0;padding-left:20px}.cs-execution .cs-button{justify-self:start}
.cs-footer{margin-top:80px;border-top:1px solid var(--cs-line);padding:42px 0 0}.cs-footer h2{font-size:21px;font-weight:400;line-height:1.7;margin:12px 0 20px}.cs-source-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px 30px}.cs-source-list h3{font-size:12px;font-weight:550}.cs-footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:35px 0;border-top:1px solid var(--cs-line);margin-top:20px;font-size:10px;color:#8a9680}.cs-footer-bottom b{font-weight:550;color:#5b7251}.cs-footer-bottom button{border:0;background:none;color:#5b7251;font-size:10px}.cs-loading{min-height:100vh;display:grid;place-content:center;text-align:center;background:#f7f7f1;color:#425f40;padding:25px}.cs-loading button{border:1px solid #7e9471;background:transparent;padding:10px 20px;color:#425f40;margin:20px auto}
@media(min-width:1800px){.cs-main{margin-right:auto;margin-left:240px;padding-left:70px;padding-right:70px}.cs-rail{width:240px}.cs-hero-image img{height:430px}}
@media(max-width:1250px){.cs-main{padding:0 32px;margin-left:190px}.cs-rail{width:190px;padding:30px 17px}.cs-rail nav button{font-size:11px;gap:9px}.cs-hero{gap:24px;padding-top:45px}.cs-hero h1{font-size:34px}.cs-hero-image img{height:310px}.cs-economics-grid{grid-template-columns:1fr 215px}.cs-margin-note{padding:23px 20px}.cs-period-readout{grid-template-columns:1fr 250px;gap:25px}.cs-period-readout dl{padding-left:20px}.cs-season-grid article{padding:24px 20px}.cs-lab{grid-template-columns:225px 1fr}.cs-lab-controls{padding:24px 20px}.cs-lab-comparison{gap:20px}.cs-lab-comparison strong{font-size:25px}.cs-keyword-tree article{grid-template-columns:35px 1fr 170px;gap:12px}.cs-section-heading h2{font-size:26px}.cs-overview-band strong{font-size:25px}.cs-overview-band small{display:block;margin:4px 0 0}}
@media(max-width:1000px){.cs-header{padding:0 27px;height:72px}.cs-header-caption{display:none}.cs-rail{position:sticky;top:72px;width:100%;height:auto;z-index:20;display:block;border-right:0;border-bottom:1px solid var(--cs-line);padding:0 22px;overflow:auto}.cs-rail-label,.cs-rail-note{display:none}.cs-rail nav{flex-direction:row;gap:12px;width:max-content;padding:10px 0}.cs-rail nav button{padding:8px 12px;font-size:11px;gap:8px}.cs-main{margin-left:0;padding:0 32px}.cs-hero h1{font-size:38px}.cs-section,.cs-hero{scroll-margin-top:150px}.cs-economics-grid{grid-template-columns:1fr 230px}.cs-hero-image img{height:310px}.cs-section{padding-top:70px}.cs-footer{margin-top:65px}}
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