:root{--paper:#f5f4ef;--white:#fffefa;--ink:#232722;--muted:#62685f;--line:#dcded5;--accent:#b74428;--peach:#f3d4bb;--green:#e7eddf;--dark:#252c27}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:105px}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}img{max-width:100%;height:auto}[hidden]{display:none!important}:focus-visible{outline:3px solid var(--accent);outline-offset:5px}p{margin:0 0 1.2em}h1,h2,h3{margin:0;font-weight:700;line-height:1.4;letter-spacing:-.035em}h2{font-size:32px}h3{font-size:20px}em{font-style:normal}small,.small{font-size:13px}section[id]{scroll-margin-top:105px}.container{width:min(1200px,calc(100% - 96px));margin-inline:auto}.skip-link{position:fixed;top:10px;left:10px;z-index:20;padding:12px 20px;background:var(--ink);color:white;transform:translateY(-150%)}.skip-link:focus{transform:translateY(0)}
.site-header{position:sticky;top:0;z-index:10;background:rgba(245,244,239,.97);border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;gap:32px;min-height:92px}.brand{display:flex;align-items:center;gap:13px;flex-shrink:0}.brand-mark{display:grid;place-content:center;width:43px;height:43px;border:1px solid var(--ink);font:italic 700 27px Georgia,serif;position:relative}.brand-mark span{position:absolute;right:4px;bottom:0;color:var(--accent);font-size:22px}.brand-name{font-weight:750;font-size:22px;line-height:1.2;letter-spacing:-.6px}.brand-name small{display:block;font-size:10px;letter-spacing:1.4px;font-weight:400;margin-top:7px;color:var(--muted)}#site-nav{display:flex;align-items:center;gap:25px;margin-left:auto}#site-nav a{font-size:14px;white-space:nowrap;padding:11px 0;border-bottom:2px solid transparent}#site-nav a:hover,#site-nav a[aria-current]{border-color:var(--accent);color:var(--accent)}.header-contact{border-left:1px solid var(--line);padding-left:25px;font-size:14px;white-space:nowrap}.header-contact:hover{color:var(--accent)}.menu-toggle{display:none;border:0;background:transparent;padding:10px}
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.workbench{background:var(--dark);color:#f3f4e9;border-radius:9px;padding:26px 30px;box-shadow:10px 10px 0 #e1e2d8}.workbench-top{display:flex;justify-content:space-between;align-items:center;padding-bottom:20px;border-bottom:1px solid #4d574f;font-size:12px}.small-mark{font-size:21px;color:#d7e6b8;margin-right:8px}.mono{font-family:Consolas,monospace;font-size:11px;letter-spacing:1px}.workbench .mono{color:#b9c3b5}.example-picker{display:flex;gap:7px;margin-top:20px}.example-picker button{font-size:12px;color:#d3dacf;border:1px solid #5e6b60;background:none;border-radius:4px;padding:5px 15px;min-height:34px}.example-picker button[aria-pressed=true]{color:var(--dark);background:#d5e3b8;border-color:#d5e3b8}.example-picker button:disabled{cursor:default}.sample-label{font-size:10px;color:#bac4b6;margin:24px 0 8px;letter-spacing:1px}.before-prompt{font-size:20px;color:#c4ccbf;margin:0}.example-divider{display:flex;justify-content:space-between;align-items:center;color:#aebba9;font-size:10px;border-bottom:1px solid #4d574f;padding:14px 0 10px}.sample-label.accent{color:#d5e3b8;margin-top:17px}.after-prompt{font-size:16px;line-height:1.95;min-height:124px;margin-bottom:17px}.prompt-tags{display:flex;gap:8px}.prompt-tags span{font-size:10px;color:#d5e3b8;border:1px solid #5c6955;border-radius:3px;padding:1px 9px}.workbench-bottom{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #4d574f;margin-top:24px;padding-top:15px;font-size:10px;color:#bec7b8}.copy-button{font-size:12px;min-height:36px;background:transparent;color:var(--accent);border:1px solid currentColor;border-radius:4px;padding:5px 11px}.workbench .copy-button{border:0;color:#d5e3b8;padding-right:0}.copy-button:hover{background:#b7442810}
.intent-strip{display:grid;grid-template-columns:.8fr 1fr 1fr 1fr;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:23px 0;align-items:center;font-size:13px}.intent-strip>span{color:var(--muted);font-size:12px}.intent-strip a{display:flex;justify-content:space-between;gap:8px;padding:0 24px;border-left:1px solid var(--line)}.intent-strip a:hover{color:var(--accent)}.home-section{padding:76px 0;border-bottom:1px solid var(--line)}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:32px}.section-heading h2,.entry-section h2,.home-faq h2{margin-top:13px}.section-intro{font-size:14px;color:var(--muted);max-width:720px;margin-top:-12px;margin-bottom:28px}
.guide-grid{display:grid;grid-template-columns:1fr 1.13fr;gap:52px}.guide-feature{display:block;position:relative;background:var(--peach);border-radius:5px;padding:32px 34px}.guide-feature .eyebrow{color:#735240}.guide-feature h3{font-size:28px;margin:19px 0 16px}.guide-feature p{max-width:320px;font-size:14px;color:#665144;line-height:1.9}.guide-arrow{position:absolute;right:29px;top:28px;font-size:26px}.step-visual{display:flex;align-items:center;gap:12px;margin:32px 0 35px}.step-visual span{border:1px solid #ad8c72;padding:12px 22px;font-size:13px;border-radius:2px}.step-visual i{font-style:normal;color:#95735b}.guide-foot{border-top:1px solid #c6a990;padding-top:16px;display:flex;justify-content:space-between;font-size:12px}.guide-feature:hover{background:#edc7a8}.guide-list{display:flex;flex-direction:column}.guide-list>a{display:grid;grid-template-columns:28px 1fr 20px;gap:16px;align-items:start;padding:25px 0;border-bottom:1px solid var(--line)}.guide-list>a:first-child{padding-top:5px}.guide-list>a:last-child{border:0;padding-bottom:0}.number{font-family:Consolas,monospace;color:var(--accent);font-size:12px;letter-spacing:1px;line-height:2.4}.guide-list h3{font-size:20px}.guide-list p{font-size:13px;margin:7px 0 0;color:var(--muted)}.guide-list>a:hover h3{color:var(--accent)}
.model-grid{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:5px;overflow:hidden}.model-card{padding:24px 28px;background:var(--white);border-right:1px solid var(--line)}.model-card:last-child{border-right:0}.model-card>div:first-child{display:flex;align-items:center;gap:9px}.model-card>div:first-child>span:last-child{margin-left:auto}.model-dot{width:8px;height:8px;background:#b74428;border-radius:50%}.model-card:nth-child(2) .model-dot{background:#557159}.model-card:nth-child(3) .model-dot{background:#af9360}.model-card h3{font-family:Arial,sans-serif;font-size:40px;font-weight:500;letter-spacing:-1.5px;margin:29px 0 13px}.model-card p{font-size:13px;color:var(--muted);min-height:24px}.model-price{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:17px;font-size:11px;color:var(--muted)}.model-price strong{font-size:16px;color:var(--ink);font-weight:500;margin-left:4px}.model-card:hover{background:var(--green)}.source-note{font-size:11px;color:var(--muted);margin:17px 0 0}.source-note a{text-decoration:underline;text-underline-offset:3px}
.entry-section{display:grid;grid-template-columns:.9fr 1.1fr;gap:95px}.entry-section>div:first-child>p{color:var(--muted);font-size:14px;max-width:330px;margin-top:22px}.entry-list>div{display:grid;grid-template-columns:25px 1fr;gap:17px;border-bottom:1px solid var(--line);padding:22px 0}.entry-list>div:first-child{padding-top:0}.entry-list>div:last-child{border:0;padding-bottom:0}.entry-list p{font-size:13px;color:var(--muted);margin:7px 0 8px}.entry-list a{font-size:13px;color:var(--accent)}.home-faq{display:grid;grid-template-columns:.9fr 1.1fr;gap:95px}.home-faq h2{margin-bottom:23px}.faq-list details{border-bottom:1px solid var(--line)}.faq-list summary{cursor:pointer;font-weight:600;font-size:15px;min-height:62px;padding:17px 30px 17px 0;position:relative;list-style:none}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:'+';position:absolute;right:4px;top:16px;font-size:20px;font-weight:400;color:var(--accent)}.faq-list details[open] summary:after{content:'−'}.faq-list details>div{font-size:14px;color:var(--muted);padding:0 18px 6px 0}
.conversion{display:flex;justify-content:space-between;align-items:center;gap:50px;padding:43px 48px;background:var(--dark);color:#f5f4ef;margin:66px 0;border-radius:5px}.conversion .eyebrow{color:#c2cdb8}.conversion h2{font-size:29px;margin:15px 0}.conversion p{font-size:13px;color:#c2cdb8;max-width:500px;margin:0}.conversion-actions{display:flex;flex-direction:column;gap:10px;min-width:215px}.conversion small{text-align:center;font-size:10px;color:#c2cdb8}
.site-footer{border-top:1px solid var(--line);padding:46px 0 20px}.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:35px;font-size:12px}.footer-brand{font-size:27px;font-weight:700;letter-spacing:-1px}.footer-brand span{color:var(--accent)}.footer-grid p{margin:10px 0 4px;font-size:13px}.footer-grid small{font-size:11px;color:var(--muted)}.footer-grid>div:not(:first-child){display:flex;flex-direction:column;gap:8px}.footer-grid strong{font-size:12px;margin-bottom:10px}.footer-grid a:hover{color:var(--accent)}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-top:20px;margin-top:40px;color:var(--muted);font-size:10px}
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.table-scroll{max-width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:5px;margin-bottom:24px;background:var(--white)}table{border-collapse:collapse;width:100%;text-align:left;min-width:580px;font-size:14px}caption{text-align:left;padding:17px 20px;color:var(--muted);font-size:12px;border-bottom:1px solid var(--line)}th,td{padding:17px 20px;border-bottom:1px solid var(--line);line-height:1.7}thead{background:var(--green);font-size:12px}tbody th{font-weight:600}tbody tr:last-child>*{border-bottom:0}td{color:#50594e}.calculator{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;background:var(--green);border-radius:5px;padding:27px}.field{display:flex;flex-direction:column;gap:8px}.field label{font-size:12px}.field input,.field select{min-width:0;width:100%;border:1px solid #b8c3b0;border-radius:3px;background:var(--white);padding:11px;color:var(--ink);height:48px}.cost-result{grid-column:1/-1;display:flex;flex-direction:column;border-top:1px solid #c4ceba;padding-top:20px}.cost-result>span{font-size:12px}.cost-result output{font:500 36px/1.8 Arial,sans-serif;overflow-wrap:anywhere}.cost-result small{font-size:11px;color:var(--muted)}.sources{border-top:1px solid var(--line);padding-top:30px}.sources p,.sources li{font-size:12px}.sources ul{padding-left:20px}.sources h2{font-size:18px}.related{border-top:1px solid var(--line);padding-top:23px;display:flex;gap:20px;flex-wrap:wrap;font-size:13px}.contact-layout{display:grid;grid-template-columns:240px 1fr;gap:28px;align-items:center}.qr-code{display:block;object-fit:contain;background:white;padding:12px;border:1px solid var(--line);border-radius:4px;aspect-ratio:1}.contact-layout .qr-code{width:240px}.directory{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}.article-body .directory>a{position:relative;border-top:1px solid var(--line);padding:16px 25px 12px 0;color:var(--ink);text-decoration:none}.directory p{font-size:13px}.directory>a>span{position:absolute;right:3px;top:32px;color:var(--accent)}.error-page{min-height:55vh;padding-block:100px}.error-page h1{font-size:42px;margin:20px 0}.error-page p{color:var(--muted)}
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@media(max-width:800px){.container{width:calc(100% - 40px)}.header-inner{min-height:76px;flex-wrap:wrap;gap:12px}.brand-name{font-size:20px}.brand-mark{width:37px;height:37px}.header-contact{margin-left:auto;border:0;padding:9px;font-size:13px}.menu-toggle{display:block;order:3;font-size:13px}.menu-toggle:not([hidden])+#site-nav{display:none}#site-nav{order:4;width:100%;margin:0;flex-wrap:wrap;gap:5px 24px;padding:8px 0 15px}.menu-toggle:not([hidden])+#site-nav.is-open{display:flex}.menu-toggle[hidden]+#site-nav{display:flex}.edition{font-size:10px;letter-spacing:0;gap:14px}.hero{grid-template-columns:1fr;gap:38px;padding:40px 0}.hero h1{font-size:48px;margin-top:18px}.hero-description{font-size:16px}.workbench{padding:25px;max-width:600px;width:100%;justify-self:center}.after-prompt{min-height:0}.intent-strip{grid-template-columns:1fr;gap:0;padding:12px 0}.intent-strip>span{padding:10px 0}.intent-strip a{border-left:0;border-top:1px solid var(--line);padding:13px 0;font-size:13px}.home-section{padding:47px 0}.section-heading{align-items:start;gap:20px}.section-heading h2,h2{font-size:26px}.section-heading>.text-link{font-size:12px;max-width:95px;text-align:right;padding-top:24px}.guide-grid{grid-template-columns:1fr}.guide-feature{padding:28px}.guide-feature h3{font-size:26px}.guide-feature p{max-width:90%}.guide-list>a:first-child{padding-top:10px}.guide-list>a{padding:20px 0}.model-card{padding:20px 16px}.model-card h3{font-size:30px}.model-card p{font-size:12px;min-height:46px}.model-price{flex-direction:column;gap:5px}.model-card .mono{font-size:9px;letter-spacing:0}.entry-section,.home-faq{grid-template-columns:1fr;gap:30px}.entry-section>div:first-child>p{max-width:100%;margin-top:17px}.entry-section h2 br{display:none}.conversion{margin:45px 0;padding:30px;flex-direction:column;align-items:stretch;gap:25px}.conversion h2{font-size:25px}.conversion-actions{display:grid;grid-template-columns:1fr 1fr}.conversion small{grid-column:1/-1}.footer-grid{grid-template-columns:repeat(3,1fr);gap:25px}.footer-grid>div:first-child{grid-column:1/-1}.footer-bottom{flex-wrap:wrap}.article-header{padding:15px 0 28px}.article-header h1{font-size:34px}.lead{font-size:15px}.article-layout{grid-template-columns:1fr;gap:30px;margin-top:25px}.toc{position:static}.toc nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.toc .toc-service{display:none}.article-body h2{font-size:23px}.contact-layout{grid-template-columns:1fr}.contact-layout .qr-code{width:250px;justify-self:center}.error-page{padding-block:70px}.error-page h1{font-size:32px}}
@media(max-width:480px){.container{width:calc(100% - 36px)}.header-inner{gap:4px}.brand{gap:9px}.brand-name{font-size:19px}.brand-name small{font-size:9px;letter-spacing:1px}.brand-mark{width:34px;height:34px;font-size:24px}.header-contact{font-size:11px;padding:8px}.menu-toggle{font-size:11px;padding:8px}.edition{align-items:start}.edition>span{max-width:160px}.edition>a{white-space:nowrap}.hero h1{font-size:40px;line-height:1.32}.hero .eyebrow{font-size:10px}.hero-description{font-size:15px}.button-row{gap:17px}.hero .button{font-size:13px;padding:12px 15px}.hero .text-link{font-size:12px}.workbench{padding:21px}.workbench-top{font-size:11px}.workbench-top .mono{font-size:10px}.after-prompt{font-size:15px}.section-heading h2{font-size:23px}.model-grid{grid-template-columns:1fr}.model-card{border-right:0;border-bottom:1px solid var(--line);padding:22px}.model-card:last-child{border:0}.model-card h3{font-size:35px;margin:17px 0 7px}.model-card p{min-height:0}.model-card .mono{font-size:11px}.model-price{flex-direction:row}.conversion{padding:25px}.conversion-actions{display:flex}.conversion h2{font-size:23px}.footer-grid{grid-template-columns:1fr 1fr;font-size:11px}.footer-grid>div:last-child{grid-column:1/-1}.footer-bottom>span:nth-child(2){display:none}.article-header h1{font-size:29px}.meta{gap:10px 15px}.toc nav{grid-template-columns:1fr}.article-body>section{margin-bottom:36px}.article-body h2{font-size:21px}.article-body p,.article-body li{font-size:14px}.recommendations{grid-template-columns:1fr;gap:10px}.recommendations>div{border-top:1px solid var(--line);padding-top:12px}.recommendations p{margin-bottom:8px}.calculator{padding:20px;gap:16px}.cost-result output{font-size:30px}.definition-list>div{grid-template-columns:1fr;gap:7px}.directory{grid-template-columns:1fr}.prompt-label{padding:12px 15px;font-size:11px}.copy-button{font-size:11px;flex-shrink:0}pre{font-size:13px;padding:17px}.guide-feature{padding:25px}.guide-feature h3{font-size:24px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media print{.site-header,.site-footer,.toc,.conversion,.copy-button,.breadcrumbs,dialog,.toast{display:none!important}.container{width:100%}.article-layout{display:block}.article-header h1{font-size:28px}body{background:white;color:black}.table-scroll{overflow:visible}table{min-width:0}.article-body a{text-decoration:underline}.article-body>section{break-inside:avoid}}


@media(max-width:800px){.js #site-nav{display:none}.js #site-nav.is-open{display:flex}} .workbench-bottom{min-height:52px}