:root{--paper:#F7F5F0;--white:#fff;--pale:#EAF0EA;--sand:#F2EBDD;--ink:#183B36;--deep:#112E2A;--link:#275D55;--rust:#9A4935;--text:#263630;--muted:#51635D;--line:#D7DED7;--foot:#18332F}
*,*::before,*::after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);font:16px/1.8 system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text)}a{color:var(--link);text-underline-offset:.19em}a:hover{color:var(--rust)}a:focus-visible,button:focus-visible{outline:3px solid #B76937;outline-offset:3px;border-radius:3px}button{font:inherit;cursor:pointer}h1,h2,h3,p,ul,ol,figure{margin-top:0}h1,h2,h3{line-height:1.4;color:var(--ink);overflow-wrap:break-word}h1{font-size:34px;letter-spacing:-.02em}h2{font-size:24px}h3{font-size:19px}p{margin-bottom:1.15em}.container{max-width:1120px;width:100%;margin-inline:auto;padding-inline:30px}.reading{max-width:980px;margin-inline:auto;padding-inline:30px}.narrow{max-width:740px}figure,article,section,aside,div,li{min-width:0}.skip{position:absolute;left:10px;top:-80px;z-index:10;background:#fff;padding:8px 16px}.skip:focus{top:8px}
.site-header{background:#fff;border-bottom:1px solid var(--line)}.brand-row{height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);min-width:0}.brand-mark{display:flex;align-items:center;justify-content:center;min-width:0;max-width:170px;min-height:36px;background:var(--paper);border-radius:6px;padding:3px 7px}.brand-mark img{display:block;max-height:32px;width:auto;max-width:160px;object-fit:contain}.brand-mark strong{white-space:nowrap;font-size:20px}.brand-copy{display:flex;flex-direction:column;line-height:1.3;white-space:nowrap}.brand-copy b{font-size:12px;letter-spacing:.1em}.brand-copy small{font-size:12px;color:var(--muted)}.head-actions{display:flex;align-items:center;gap:18px;white-space:nowrap}.head-actions a{text-decoration:none;font-size:15px}.head-actions button{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:7px;padding:6px 14px;min-height:44px}.mobile-home{display:none}.channel-bar{border-top:1px solid var(--line)}.channel-items{display:flex;align-items:center;gap:36px;height:48px}.channel-items a{display:inline-flex;height:48px;align-items:center;border-bottom:2px solid transparent;text-decoration:none;font-size:15px;color:var(--text)}.channel-items a[aria-current=page]{font-weight:700;border-bottom-color:var(--ink);color:var(--ink)}.section-map{padding-block:22px 28px;border-top:1px solid var(--line)}.section-map[hidden]{display:none!important}.map-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.map-grid section{border-top:1px solid var(--line);padding-top:10px}.map-grid h2{font-size:17px;margin-bottom:8px}.map-grid ul{list-style:none;margin:0;padding:0}.map-grid li{margin-bottom:3px}.map-grid a{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px;font-size:14px;text-decoration:none;padding:4px 0}.map-grid a span{color:var(--muted);font-size:13px}.nojs-links{display:flex;gap:12px;flex-wrap:wrap;padding-block:12px}.nojs-links a{font-size:14px}
main{min-height:50vh}.page-intro{padding-top:36px;padding-bottom:18px}.crumbs{font-size:14px;color:var(--muted);margin-bottom:20px}.crumbs a{color:var(--link)}.page-intro h1{margin-bottom:12px}.lede{font-size:17px;line-height:1.85;color:var(--text);max-width:780px}.prose{max-width:740px}.prose h2{margin-top:30px;margin-bottom:14px}.prose h3{margin-top:22px;margin-bottom:10px}.prose p{line-height:1.92}.prose li{margin-bottom:12px}.article-wrap{padding-bottom:54px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 235px;gap:32px;align-items:start}.side-note{border-top:3px solid var(--ink);padding:18px;background:var(--pale);font-size:14px}.side-note h2{font-size:18px}.side-note ul{padding-left:20px}.side-note li{margin-bottom:10px}.related{border-top:1px solid var(--line);padding-top:24px;margin-top:34px}.related h2{font-size:20px}.related-links{display:flex;flex-wrap:wrap;gap:12px}.related-links a,.text-link{display:inline-flex;align-items:center;min-height:44px;padding:7px 13px;border:1px solid var(--line);border-radius:6px;background:#fff;text-decoration:none;font-size:14px}.related-links a:hover,.text-link:hover{border-color:var(--link)}.picture{margin:22px 0 25px}.picture img{display:block;max-width:100%;height:auto;border:1px solid var(--line);border-radius:9px}.picture.feature-image img{max-width:min(100%,420px);max-height:250px;width:auto}.picture.narrow-image img{max-width:min(100%,330px);max-height:210px;width:auto}.picture.hero-image img{max-width:100%;max-height:265px;width:auto}.picture.app-image img{max-width:min(100%,220px);max-height:370px;width:auto}.picture.inline-image img{max-width:min(100%,360px);max-height:220px;width:auto}.split{display:grid;grid-template-columns:minmax(0,1.16fr) minmax(0,.84fr);gap:28px;align-items:start}.split.text-only{display:block}.split.reverse{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr)}.hero{padding-top:38px;padding-bottom:40px;align-items:center}.hero h1{max-width:620px}.hero .lede{font-size:16px}.hero .picture{margin:0;justify-self:end}.intro-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.intro-actions a{min-height:44px;display:inline-flex;align-items:center;padding:8px 17px;background:var(--ink);color:white;text-decoration:none;border-radius:7px}.intro-actions a:nth-child(2){background:var(--sand);color:var(--ink)}.home-section{padding-top:42px;padding-bottom:48px;border-top:1px solid var(--line)}.home-section h2{margin-bottom:18px}.section-heading{font-size:14px;letter-spacing:.06em;color:var(--rust);font-weight:700;margin-bottom:8px}.steps{counter-reset:steps;display:grid;gap:14px;padding:0;list-style:none}.steps li{counter-increment:steps;border-left:2px solid var(--line);padding-left:22px;position:relative}.steps li:before{content:'0' counter(steps);position:absolute;top:0;left:-1px;transform:translateX(-100%);padding-right:7px;font-weight:700;color:var(--rust);font-size:13px}.steps h3{margin-bottom:6px}.mini-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.mini-index a{border-top:1px solid var(--line);text-decoration:none;padding-top:10px;font-weight:600}.mini-index p{margin:3px 0;font-size:14px;color:var(--muted);font-weight:400}.numbered{counter-reset:n;list-style:none;margin:16px 0;padding:0}.numbered>li{counter-increment:n;border-top:1px solid var(--line);padding:13px 0 10px 40px;position:relative}.numbered>li:before{content:counter(n,decimal-leading-zero);position:absolute;left:0;top:14px;font-weight:700;color:var(--rust)}.numbered h3{margin-bottom:5px}.quote-note{background:var(--sand);padding:20px 24px;border-left:3px solid var(--rust)}.essay{background:#fff;padding:25px 30px;border-radius:9px}.state-lines{border-top:1px solid var(--line)}.state-lines p{padding:10px 0;border-bottom:1px solid var(--line);margin:0}.tag{font-size:13px;color:var(--rust);font-weight:700;padding-right:12px}.route-list{display:grid;gap:15px}.route{padding:18px 22px;background:#fff;border-left:3px solid var(--link);border-radius:4px}.route h2{font-size:21px}.route p:last-child{margin-bottom:0}.qa-list{display:grid;gap:18px}.qa-list section{padding:20px 23px;border:1px solid var(--line);background:#fff;border-radius:8px}.qa-list h2{font-size:19px}.qa-list p{margin-bottom:0}.anchor-links{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0}.anchor-links a{font-size:14px;border-bottom:2px solid var(--link);text-decoration:none;padding:8px}.vertical-flow{border-left:2px solid var(--line);padding-left:22px}.vertical-flow section{position:relative;margin-bottom:24px}.vertical-flow section:before{content:'';position:absolute;left:-29px;top:11px;width:12px;height:12px;background:var(--rust);border:2px solid var(--paper);border-radius:50%}.smallprint{font-size:14px;color:var(--muted)}
.site-footer{background:var(--foot);color:#F4F7F2;padding-top:36px}.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1.2fr 1fr;gap:27px;padding-bottom:34px}.site-footer h2{font-size:16px;color:#fff;margin-bottom:12px}.site-footer p{font-size:14px;line-height:1.75}.site-footer a{display:block;font-size:14px;color:#F4F7F2;margin:4px 0;text-decoration:underline;text-decoration-color:#88A79F;text-underline-offset:3px}.site-footer a:hover{color:#fff;text-decoration-color:#fff}.footer-bottom{border-top:1px solid #46645E;padding-block:15px;display:flex;justify-content:space-between;gap:16px;font-size:14px}.mobile-bottom{display:none}
@media(max-width:900px){.container,.reading{padding-inline:22px}.article-layout{grid-template-columns:minmax(0,1fr)}.side-note{max-width:740px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.split{gap:20px}.channel-items{gap:24px}}
@media(max-width:767px){.container,.reading{padding-inline:16px}.brand-row{height:60px}.brand-mark{max-width:128px}.brand-mark img{max-width:118px;max-height:29px}.brand-copy b{font-size:11px}.brand-copy small{font-size:10px}.desktop-action,.channel-bar{display:none!important}.mobile-home{display:inline}.head-actions{gap:10px}.head-actions button{padding:5px 10px}.map-grid{grid-template-columns:minmax(0,1fr);gap:12px}.map-grid a{padding:6px 0}.map-grid a span{font-size:13px}.split,.split.reverse,.article-layout,.mini-index{display:grid;grid-template-columns:minmax(0,1fr);gap:14px}.split>*{grid-column:auto!important;grid-row:auto!important;grid-area:auto!important;order:initial!important;width:auto;min-width:0}.hero{padding-top:28px;padding-bottom:30px}.hero .picture{justify-self:start}.picture.hero-image img{max-height:200px}.picture.feature-image img{max-height:200px}.picture.narrow-image img{max-height:200px}.picture.app-image img{max-width:min(100%,180px);max-height:300px}.page-intro{padding-top:24px}.page-intro h1,h1{font-size:27px}.lede{font-size:16px}.prose h2,h2{font-size:22px}.prose h3,h3{font-size:18px}.home-section{padding-top:32px;padding-bottom:36px}.essay{padding:19px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.site-footer{padding-bottom:calc(66px + env(safe-area-inset-bottom))}.mobile-bottom{position:fixed;bottom:0;left:0;right:0;z-index:9;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));height:calc(56px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--line)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:44px;text-decoration:none;color:var(--ink);font-size:14px}.mobile-bottom a[aria-current=page]{font-weight:700;border-top:2px solid var(--ink)}}
@media(min-width:390px) and (max-width:767px){.map-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.map-grid a{display:block}.map-grid a span{display:block;line-height:1.5}}
@media(max-width:360px){.container,.reading{padding-inline:14px}.brand{gap:5px}.brand-mark{padding:3px;max-width:105px}.brand-mark img{max-width:99px}.brand-copy small{font-size:9px}.brand-copy b{font-size:10px}.head-actions{gap:5px}.head-actions button{padding:5px 8px;font-size:14px}.head-actions a{font-size:14px}.footer-grid{grid-template-columns:minmax(0,1fr)}}