@charset "UTF-8";
:root{--paper:#f6f5f0;--white:#fff;--ink:#1b2420;--muted:#667069;--line:#d9ddd5;--green:#226b51;--wash:#e7eee7;--orange:#a65936;--mono:ui-monospace,SFMono-Regular,Consolas,monospace;--sans:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI","Noto Sans CJK SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}a:hover{color:var(--green)}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #a8cbb7;outline-offset:4px}::selection{background:#c8ddcc}svg{display:block}.wrap{max-width:1160px;margin:auto;padding:0 32px}.skip{position:absolute;left:12px;top:-80px;background:var(--ink);color:white;padding:10px;z-index:20}.skip:focus{top:10px}.header{border-bottom:1px solid var(--line)}.header-inner{min-height:94px;display:flex;align-items:center;gap:34px}.brand{font-size:25px;letter-spacing:-1.2px;font-weight:750;white-space:nowrap;display:flex;gap:8px;align-items:center}.brand-dot{width:9px;height:9px;background:var(--green);display:inline-block}.brand small{font-family:var(--mono);font-size:9px;letter-spacing:1px;font-weight:400;border-left:1px solid var(--line);margin-left:5px;padding-left:13px;line-height:1.4;color:var(--muted)}nav{display:flex;gap:23px;margin-left:auto;font-size:13px;font-weight:600}.languages{display:flex;gap:11px;font-family:var(--mono);font-size:11px;border-left:1px solid var(--line);padding-left:22px}.languages a[aria-current=page]{color:var(--green);text-decoration:underline;text-underline-offset:5px}.eyebrow,.kicker,.section-number{font-family:var(--mono);font-size:10px;font-weight:600;letter-spacing:1.8px;text-transform:uppercase}.eyebrow{color:var(--green);margin:0 0 25px;display:flex;gap:12px;align-items:center}.eyebrow:before{content:"";width:24px;height:1px;background:var(--green)}.hero{display:grid;grid-template-columns:1.5fr 1fr;gap:70px;padding:75px 0 74px;align-items:center}.hero h1{font-family:Georgia,"Times New Roman","Noto Serif CJK SC",serif;font-size:clamp(45px,5vw,69px);font-weight:400;letter-spacing:-2.4px;line-height:1.06;margin:0 0 25px}.hero p.lead{max-width:560px;font-size:16px;color:var(--muted);line-height:1.8}.actions{display:flex;align-items:center;gap:25px;flex-wrap:wrap;margin-top:30px}.button{border:1px solid var(--green);background:var(--green);color:#fff;display:inline-flex;align-items:center;justify-content:center;gap:22px;padding:11px 19px;font-size:12px;font-weight:650;border-radius:2px}.button:hover{color:white;background:#174c3a}.button.secondary{background:transparent;color:var(--green)}.text-link{font-size:12px;font-weight:600;border-bottom:1px solid 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var(--line);padding-top:12px}.toolstrip{display:flex;align-items:center;gap:22px;flex-wrap:wrap;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font:11px var(--mono);color:var(--muted)}.toolstrip span:first-child{font-size:9px;letter-spacing:1.4px;color:var(--green);margin-right:auto}.section{padding:64px 0;border-bottom:1px solid var(--line)}.section-head{display:flex;gap:20px;align-items:flex-start;justify-content:space-between;margin-bottom:28px}.section-number{color:var(--green);margin:0 0 13px}.section h2{font-size:29px;font-weight:500;line-height:1.3;letter-spacing:-.8px;margin:0}.section-head p{font-size:13px;max-width:530px;color:var(--muted);margin:13px 0 0}.section-head .text-link{align-self:flex-end;white-space:nowrap}.provider-list{border-top:1px solid var(--line)}.provider-row{display:grid;grid-template-columns:26px 1.1fr 2fr 20px;align-items:center;gap:16px;padding:17px 6px;border-bottom:1px solid var(--line);font-size:12px}.provider-row:hover{background:#eeefe8}.provider-index{font:9px var(--mono);color:var(--muted)}.provider-name{font-weight:650}.provider-price{font:11px/1.6 var(--mono);color:var(--muted)}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);border-left:1px solid var(--line)}.article-card{display:flex;flex-direction:column;padding:26px;background:rgba(255,255,255,.35);border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:290px;transition:background .15s}.article-card:hover{background:white}.card-meta{display:flex;justify-content:space-between;gap:10px;font:9px var(--mono);color:var(--green);letter-spacing:.6px}.article-card h3{font-size:19px;font-weight:550;line-height:1.4;letter-spacing:-.4px;margin:25px 0 10px}.article-card p{font-size:12px;color:var(--muted);margin:0 0 22px}.card-foot{display:flex;justify-content:space-between;font:10px var(--mono);margin-top:auto;color:var(--muted)}.card-foot b{font-weight:500;color:var(--ink)}.method-callout{display:grid;grid-template-columns:1.05fr 1fr;gap:70px;padding:60px 0}.method-callout h2{font-family:Georgia,"Times New Roman",serif;font-size:35px;font-weight:400;letter-spacing:-.8px;line-height:1.25;margin:0}.method-callout p{font-size:13px;color:var(--muted);margin:0 0 20px}.footer{border-top:1px solid var(--line);padding:30px 0 34px}.footer-inner{display:flex;justify-content:space-between;gap:24px;font-size:10px;color:var(--muted)}.footer strong{font-size:13px;color:var(--ink);letter-spacing:-.4px}.footer p{margin:7px 0}.footer-meta{text-align:right;font:9px/1.8 var(--mono)}.page-top{padding:58px 0 35px;max-width:850px}.page-top h1{font-family:Georgia,"Times New Roman",serif;font-size:clamp(38px,5vw,58px);font-weight:400;letter-spacing:-1.6px;line-height:1.15;margin:0 0 20px}.page-top p{font-size:15px;color:var(--muted);max-width:760px}.jump-nav{display:flex;flex-wrap:wrap;gap:20px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:13px 0;font:10px var(--mono);color:var(--green)}.small-note{font-size:12px;color:var(--muted);max-width:900px;line-height:1.8}.data-table-wrap{overflow-x:auto;border-top:1px solid var(--line);margin-top:24px}.data-table{width:100%;border-collapse:collapse;font-size:12px;text-align:left}.data-table th{font:9px/1.5 var(--mono);letter-spacing:.5px;color:var(--muted);padding:14px 14px 14px 0;border-bottom:1px solid var(--line);font-weight:500}.data-table td{padding:20px 18px 20px 0;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.7}.data-table th:first-child,.data-table td:first-child{min-width:145px}.data-table strong{font-size:13px;font-weight:650}.data-table small{display:block;color:var(--muted);font-size:10px;margin-top:6px;max-width:470px}.data-table .source{color:var(--green);font:9px var(--mono);display:inline-block;margin:10px 0 0;border-bottom:1px solid #b8cbbf}.price-cell{font-family:var(--mono);font-size:11px;min-width:225px}.controls{display:grid;grid-template-columns:repeat(3,1fr) 150px;gap:15px;margin:27px 0 12px;padding:22px;background:var(--wash);border:1px solid #d1ded2}.control label{display:block;font:9px var(--mono);margin-bottom:8px;color:#4c6254}.control input,.control select{width:100%;height:40px;border:1px solid #bdccbf;background:var(--white);color:var(--ink);padding:6px 9px;border-radius:0;font:12px var(--mono)}.cost{font:14px var(--mono);color:var(--green);white-space:nowrap}.unavailable{font-size:10px;color:var(--muted)}.rate{font:11px var(--mono);white-space:nowrap}.benchmark-table{font-size:10px;min-width:1030px}.benchmark-table th{max-width:110px}.benchmark-table td{padding:16px 10px 16px 0;vertical-align:middle}.benchmark-table input[type=number]{width:91px;padding:7px 5px;border:1px solid var(--line);background:white;font:10px var(--mono);border-radius:0}.benchmark-table input[type=checkbox]{accent-color:var(--green);width:15px;height:15px}.benchmark-table .model-cell{max-width:140px;overflow-wrap:anywhere;font:9px var(--mono);color:var(--muted)}.toolbar{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:23px 0}.toolbar button,.file-button{border:1px solid var(--line);padding:8px 13px;background:transparent;color:var(--ink);font:10px var(--mono);cursor:pointer}.toolbar button:hover,.file-button:hover{border-color:var(--green);color:var(--green)}.file-button input{position:absolute;width:1px;height:1px;opacity:0}.notice{font-size:10px;color:var(--green);min-height:18px}.task-spec{background:#edf0e9;border:1px solid var(--line);padding:24px;white-space:pre-wrap;overflow-wrap:anywhere;font:11px/1.8 var(--mono);max-height:390px;overflow:auto}.method-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin:30px 0}.method-grid h3{font-size:16px;font-weight:550}.method-grid p{font-size:12px;color:var(--muted)}.article-layout{display:grid;grid-template-columns:1fr 230px;gap:65px;padding-bottom:70px}.article-body{max-width:740px}.article-body section{padding:27px 0;border-bottom:1px solid var(--line)}.article-body h2{font-size:24px;font-weight:500;line-height:1.35;letter-spacing:-.4px}.article-body p{font-size:15px;line-height:1.9;color:#414e46;white-space:pre-line}.article-aside{padding-top:36px;font-size:11px}.article-aside .sticky{position:sticky;top:35px}.article-aside a{display:block;margin:0 0 11px;color:var(--muted)}.article-aside .kicker{color:var(--green);margin:0 0 16px}.tags{display:flex;gap:8px;flex-wrap:wrap;margin:25px 0}.tag{font:9px var(--mono);border:1px solid var(--line);padding:4px 8px;color:var(--muted)}.code-box{background:#202c25;color:#deeadf;margin-top:24px}.code-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #3b493f;padding:10px 14px;font:9px var(--mono);color:#a5b6a8}.copy-button{font:9px 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var(--line);padding:14px 25px;margin-right:10px}
@media(max-width:950px){.wrap{padding:0 24px}.header-inner{gap:18px}.brand small{display:none}nav{gap:15px}.languages{padding-left:16px}.hero{gap:35px;grid-template-columns:1.2fr 1fr}.hero h1{font-size:49px;letter-spacing:-1.5px}.lab-card{padding:22px}.article-grid{grid-template-columns:repeat(2,1fr)}.article-layout{grid-template-columns:1fr 190px;gap:35px}.controls{grid-template-columns:repeat(3,1fr)}.controls .control:last-child{grid-column:1/-1;max-width:200px}.method-callout{gap:40px}.toolstrip{gap:15px}.provider-row{grid-template-columns:20px 1fr 1.4fr 16px}}
@media(max-width:680px){.wrap{padding:0 20px}.header-inner{min-height:104px;flex-wrap:wrap;padding-top:18px;padding-bottom:16px;gap:17px}.brand{font-size:23px}nav{order:3;width:100%;justify-content:space-between;gap:12px;font-size:11px}.languages{margin-left:auto;border:0;padding:0;font-size:10px}.hero{grid-template-columns:1fr;padding:44px 0 46px;gap:37px}.hero h1{font-size:47px}.hero p.lead{font-size:14px}.eyebrow{font-size:9px;letter-spacing:1.3px;margin-bottom:20px}.actions{gap:20px;margin-top:25px}.lab-card{max-width:450px;box-shadow:5px 5px 0 #e8e9e1}.lab-card h2{font-size:23px}.circuit{height:85px}.toolstrip{font-size:10px;gap:13px;line-height:1.5}.toolstrip span:first-child{width:100%}.section{padding:43px 0}.section h2{font-size:25px}.section-head{flex-direction:column;gap:16px}.section-head .text-link{align-self:flex-start}.provider-row{grid-template-columns:20px 1fr 15px;gap:10px;padding:15px 2px}.provider-price{grid-column:2;grid-row:auto;font-size:10px}.provider-row>.arrow{grid-column:3;grid-row:1/3}.article-grid{grid-template-columns:1fr}.article-card{min-height:245px;padding:23px}.article-card h3{margin-top:19px}.method-callout{grid-template-columns:1fr;gap:22px;padding:40px 0}.method-callout h2{font-size:30px}.footer-inner{flex-direction:column;gap:12px}.footer-meta{text-align:left}.page-top{padding-top:40px}.page-top h1{font-size:39px}.page-top p{font-size:14px}.jump-nav{font-size:9px;gap:12px}.controls{grid-template-columns:1fr 1fr;padding:16px;gap:12px}.controls .control:first-child{grid-column:1/-1}.controls .control:last-child{grid-column:auto;max-width:none}.control label{font-size:9px}.data-table{min-width:680px}.method-grid{grid-template-columns:1fr;gap:12px}.article-layout{grid-template-columns:1fr;gap:20px}.article-aside{padding-top:0;grid-row:1}.article-aside .sticky{position:static;display:flex;flex-wrap:wrap;gap:8px 16px}.article-aside .kicker{width:100%;margin-bottom:0}.article-aside a{font-size:10px;margin-bottom:0}.article-body p{font-size:14px}.task-spec{padding:17px;font-size:10px}html[lang=zh-Hans] .hero h1{font-size:40px}.toolbar{gap:8px}.toolbar button,.file-button{font-size:9px;padding:8px}.article-card p{font-size:13px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.article-card{transition:none}}@media print{.header,.footer,.toolbar,.actions,.copy-button{display:none}body{background:#fff}.wrap{max-width:none}.article-layout{display:block}.article-aside{display:none}.section{page-break-inside:avoid}.code-box{color:#111;background:#eee}}