:root{--navy:#102d47;--blue:#086ba0;--orange:#dd850c;--ink:#152f43;--muted:#4b6373;--paper:#fff;--surface:#eef4f7;--line:#cedbe3;--gutter:clamp(22px,5vw,80px)}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:400 16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input,select,textarea{font:inherit}a{color:inherit;text-decoration:none}button,a,select,textarea{outline-offset:5px}button:focus-visible,a:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--orange)}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.1}p{margin:16px 0}h1{font-size:clamp(43px,4.7vw,72px);letter-spacing:-.055em;max-width:1050px}h2{font-size:clamp(30px,3vw,44px);letter-spacing:-.04em}h3{font-size:24px;letter-spacing:-.02em}main{padding:0 var(--gutter)}.preview-bar{padding:8px var(--gutter);background:var(--navy);color:white;font-size:12px;display:flex;justify-content:space-between;gap:20px}.preview-bar 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var(--blue);border-radius:4px;font-weight:700;cursor:pointer}.button:hover{background:var(--navy);border-color:var(--navy)}.compact{font-size:14px;min-height:44px;padding:10px 18px}.light{background:white;color:var(--navy);border-color:white}.light:hover{background:var(--surface);color:var(--navy);border-color:var(--surface)}.secondary{background:white;color:var(--blue)}.kicker{font-size:11px;letter-spacing:1.8px;line-height:1.4;font-weight:700;color:var(--blue);margin:0 0 30px}.hero{display:grid;grid-template-columns:1.1fr 1fr;align-items:center;gap:7vw;padding:80px 0 88px}.hero h1{font-size:clamp(44px,4.8vw,74px)}.lead{font-size:19px;line-height:1.6;color:var(--muted);max-width:720px;margin-top:26px}.actions{display:flex;align-items:center;gap:24px;flex-wrap:wrap;margin-top:30px}.textlink{font-size:14px;color:var(--blue);text-decoration:underline;text-underline-offset:5px}.muted{font-size:13px;color:var(--muted)}.workflow{background:var(--surface);border:1px solid var(--line);border-radius:4px;padding:28px;box-shadow:14px 14px 0 #f6f8fa}.board-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:20px;gap:10px}.board-head b{font-size:20px;letter-spacing:-.7px}.board-head>span{font-size:9px;letter-spacing:1px;color:var(--muted)}.workflow-tabs{display:flex;gap:8px;margin:22px 0}.workflow-tabs button{padding:9px 10px;min-height:44px;font-size:11px;flex:1;border:1px solid var(--line);color:var(--muted);background:white;border-radius:3px;cursor:pointer}.workflow-tabs button[aria-pressed=true]{color:white;background:var(--navy);border-color:var(--navy)}.workflow ol{list-style:none;padding:0;margin:0}.workflow li{display:flex;gap:18px;padding:18px 0;border-bottom:1px solid var(--line);align-items:center}.workflow li>span{font-size:13px;color:var(--blue);font-weight:700}.workflow li b{font-size:15px;line-height:1.4;display:block}.workflow li 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0}.breadcrumb{display:flex;gap:12px;font-size:12px;color:var(--muted);padding-top:32px;text-transform:capitalize}.page-intro{padding:58px 0 64px;border-bottom:1px solid var(--line)}.page-intro h1{max-width:1000px}.article-section{display:grid;grid-template-columns:80px minmax(0,1fr);padding:48px 0;border-bottom:1px solid var(--line);gap:24px}.section-number{font-size:13px;color:var(--blue);padding-top:6px}.article-section h2{font-size:30px;max-width:850px}.article-section p{max-width:800px;color:var(--muted)}.article-section .linkrows{margin-top:32px;max-width:850px}.closing{margin:0;padding:72px var(--gutter);background:var(--surface);display:flex;gap:40px;justify-content:space-between;align-items:center}.closing .kicker{margin-bottom:16px}footer{padding:44px var(--gutter);border-top:1px solid var(--line);display:flex;align-items:flex-start;flex-wrap:wrap;justify-content:space-between;gap:28px}footer>div{display:flex;flex-wrap:wrap;gap:22px;font-size:13px}footer>p{font-size:11px;width:100%;color:var(--muted);margin:12px 0 0}.skip{position:absolute;top:-100px;background:var(--navy);color:white;padding:15px;z-index:10}.skip:focus{top:10px}#menu-button{display:none}#brief-form{max-width:850px;margin:40px 0 64px;padding:36px;background:var(--surface)}label{display:block;font-weight:700;margin:18px 0 8px}select,textarea{width:100%;background:white;color:var(--ink);border:1px solid #8ca5b5;border-radius:4px;padding:13px}textarea{resize:vertical}#brief-form .button{margin-top:24px}pre{font-family:inherit;white-space:pre-wrap;overflow-wrap:anywhere;background:white;padding:24px;border:1px solid var(--line);line-height:1.7}#brief-result{margin-top:40px}#brief-result p{font-size:14px}[hidden]{display:none!important}@media(min-width:1800px){main{max-width:1600px;margin:auto}.hero{gap:100px}}@media(max-width:1120px){nav{gap:18px}.brand{gap:10px}.brand span{display:none}.hero{gap:40px}.workflow{padding:22px}.hero h1{font-size:56px}}@media(max-width:850px){.site-header{padding-block:20px;position:relative}#menu-button{display:inline-flex;align-items:center;gap:20px;min-height:44px;padding:8px 12px;color:var(--navy);background:white;border:1px solid var(--line);border-radius:4px}nav{display:none;position:absolute;top:100%;left:0;width:100%;padding:25px var(--gutter);background:white;z-index:5;border-bottom:1px solid var(--line);box-shadow:0 15px 15px #102d4710}nav.open{display:flex;flex-direction:column;align-items:stretch;gap:8px}.hero{padding:48px 0 64px;grid-template-columns:1fr;gap:36px}.hero h1{font-size:clamp(44px,8vw,64px)}.hero .lead{max-width:560px}.workflow{max-width:650px;width:100%;box-shadow:none}.line-section{grid-template-columns:1fr;gap:32px;padding:48px 0}.line-section h2 br{display:none}.line-section>div>p:not(.kicker){max-width:650px}.line-section h3{font-size:23px}.closing{flex-direction:column;align-items:flex-start;padding-block:48px}.page-intro{padding:40px 0}.article-section{grid-template-columns:32px minmax(0,1fr);gap:12px}.article-section h2{font-size:27px}.preview-bar span{display:none}}@media(max-width:420px){.brand{font-size:28px}.hero h1{font-size:43px}.hero .kicker{font-size:10px;margin-bottom:24px}.hero .lead{font-size:17px}.hero .actions{gap:20px}.workflow{padding:20px}.workflow-tabs{gap:5px}.workflow-tabs button{font-size:10px;padding:8px 5px}.workflow li{gap:14px}.workflow li b{font-size:14px}.board-head b{font-size:18px}.board-head>span{font-size:8px}.article-section{padding:34px 0}#brief-form{padding:22px}.closing h2{font-size:31px}.page-intro h1{font-size:41px}footer>div{display:grid;grid-template-columns:1fr 1fr;gap:16px}.kicker{margin-bottom:22px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

.brand:after{display:none}.brand{gap:14px;letter-spacing:-1px}.brand>span{display:flex;flex-direction:column;gap:5px;border:0;padding:0}.brand img{width:88px;height:22px;object-fit:contain}.brand small{font-size:10px;letter-spacing:0;font-weight:400;color:var(--muted)}.language-switch{position:static;width:auto;box-shadow:none;flex-direction:row;align-items:center;display:flex;gap:18px;justify-content:flex-end;padding:9px var(--gutter);font-size:12px;border-bottom:1px solid var(--line);background:#f6f8fa}.language-switch a{padding:3px 0}.language-switch a[aria-current]{color:#0756a4;text-decoration:underline;text-underline-offset:5px}.nav-group{position:relative}.nav-group>summary{cursor:pointer;padding:12px 0;list-style:none}.nav-group>summary:after{content:' ⌄'}.nav-group[open]>summary{color:var(--blue)}.nav-panel{position:absolute;top:100%;left:-20px;min-width:235px;background:white;border:1px solid var(--line);padding:12px;box-shadow:0 12px 28px #102d4720;z-index:8}.nav-panel a{display:block;padding:10px;font-size:13px}.nav-panel a:hover{background:var(--surface)}html[lang^=zh] h1{letter-spacing:-.025em;line-height:1.3;font-size:clamp(38px,4.2vw,62px)}html[lang^=zh] h2,html[lang^=zh] h3{line-height:1.4;letter-spacing:0}html[lang^=zh] p{line-height:1.85}.brand{flex-shrink:0}nav{gap:24px}summary:focus-visible{outline:3px solid #dd850c;outline-offset:4px}.nav-panel a:focus-visible{outline:3px solid #dd850c}html{scroll-behavior:smooth}@media(max-width:1120px){nav{gap:14px}.site-header{gap:20px}}@media(max-width:850px){.brand>span{display:flex}.nav-panel{position:static;box-shadow:none;border:0;border-left:2px solid var(--line);margin:0 0 10px 8px}.nav-group>summary{padding:12px 0}.language-switch{gap:22px}.site-header{gap:16px}.hero h1{font-size:44px}.workflow-tabs button{font-size:12px}.concept-note{font-size:12px}.board-head>span{font-size:10px}.kicker{font-size:12px}}@media(max-width:420px){.brand img{width:72px;height:18px}.brand small{font-size:9px}.brand{font-size:27px;gap:12px}.language-switch{font-size:12px}html[lang^=zh] .hero h1{font-size:40px}html[lang^=zh] .page-intro h1{font-size:35px}.workflow-tabs button{font-size:12px}.board-head>span{font-size:9px}.hero .kicker{font-size:11px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}