@font-face{font-family:'Host Grotesk';src:url('/fonts/fovumo/host-grotesk-var.woff2?v=d89b409a6130') format('woff2');font-weight:100 900;font-display:swap}
@font-face{font-family:'Fovumo Chinese';src:url('/fonts/guides/noto-sans-sc-400.woff2?v=7c1616d78334') format('woff2');font-weight:100 500;font-display:swap}
@font-face{font-family:'Fovumo Chinese';src:url('/fonts/guides/noto-sans-sc-600.woff2?v=b004d6af492c') format('woff2');font-weight:600 900;font-display:swap}
:root{color-scheme:light;--ink:#111318;--white:#fff;--signal:#ff5a1f;--quiet:#62656b;--rule:#e4e5e7;font-family:'Host Grotesk',sans-serif;color:var(--ink);background:var(--white);font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:32px}body{margin:0;font-size:19px;line-height:1.64;-webkit-font-smoothing:antialiased}html[lang^=zh]{font-family:'Fovumo Chinese','Host Grotesk',sans-serif}html[lang^=zh] body{line-height:1.9}a{color:inherit;text-decoration-thickness:1px;text-underline-offset:4px}a:hover{text-decoration-thickness:2px}a:focus-visible,input:focus-visible,summary:focus-visible,.table-scroll:focus-visible{outline:3px solid var(--ink);outline-offset:5px}button,input{font:inherit}img{max-width:100%;height:auto}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(38px,4.2vw,65px);line-height:1.05;letter-spacing:-.045em;font-weight:650;margin-bottom:25px;max-width:22ch;text-wrap:balance}h2{font-size:30px;line-height:1.22;font-weight:650;letter-spacing:-.025em;margin-bottom:19px;text-wrap:balance}h3{font-size:25px;line-height:1.24;letter-spacing:-.02em;font-weight:620;margin-bottom:11px}p{margin-bottom:22px}ul,ol{padding-left:25px}li{padding-left:5px;margin:9px 0}strong{font-weight:650}::selection{background:var(--signal);color:var(--ink)}
.skip{position:fixed;left:20px;top:-120px;z-index:20;background:var(--ink);color:var(--white);padding:12px 20px}.skip:focus{top:12px}.site-header{max-width:1320px;margin:auto;padding:27px 44px;display:flex;align-items:center;gap:35px;border-bottom:1px solid var(--rule)}.brand{display:inline-flex;align-items:center;flex-shrink:0}.brand img{width:164px;height:40px;object-fit:contain;object-position:left center}.languages{margin-left:auto;display:flex;gap:21px;align-items:center;font-size:15px;line-height:1.5;white-space:nowrap}.languages a{padding:11px 0;text-decoration:none;color:var(--quiet)}.languages a[aria-current]{color:var(--ink);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:7px}.product-link{font-size:15px;font-weight:600;white-space:nowrap}.site-footer{max-width:1232px;margin:80px auto 0;padding:28px 0 35px;border-top:1px solid var(--rule);display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:14px;color:var(--quiet);flex-wrap:wrap}.site-footer span{display:flex;gap:22px}.site-footer p{margin:0;flex-basis:100%;font-size:13px}.intro{font-size:23px;line-height:1.5;color:var(--quiet);max-width:58ch;margin-bottom:26px}.audience{font-size:16px;font-weight:550;color:var(--quiet);margin-bottom:17px}.back{display:inline-block;font-size:15px;margin-bottom:35px;color:var(--quiet)}
.directory{max-width:1060px;margin:65px auto 0;padding:0 26px}.directory-intro{padding-bottom:38px}.directory h1{max-width:20ch}.directory .intro{max-width:58ch}.directory-tools{display:flex;align-items:center;justify-content:space-between;gap:25px;margin:12px 0 14px;padding-top:28px;border-top:1px solid var(--rule)}.directory-tools h2{font-size:22px;margin:0}.directory-tools label{font-size:14px;color:var(--quiet);width:min(100%,330px)}.directory-tools input{display:block;width:100%;margin-top:6px;padding:10px 13px;min-height:46px;border:1px solid var(--quiet);border-radius:4px;background:var(--white);color:var(--ink);font-size:16px}.guide-list{list-style:none;padding:0;margin:0}.guide-list li{margin:0;padding:0;border-bottom:1px solid var(--rule)}.guide-list a{display:block;padding:28px 0 25px;text-decoration:none;max-width:100%}.guide-list a:hover h3{text-decoration:underline;text-underline-offset:4px}.guide-audience{font-size:14px;color:var(--quiet);display:block;margin-bottom:7px}.guide-list h3{max-width:44ch}.guide-list p{font-size:17px;line-height:1.5;max-width:78ch;color:var(--quiet);margin:0}.guide-list [hidden]{display:none}#guide-empty{padding:30px 0}
.article-layout{max-width:1130px;margin:57px auto 0;display:grid;grid-template-columns:minmax(0,760px) 245px;gap:70px;padding:0 20px}.article-heading{padding-bottom:29px;border-bottom:1px solid var(--rule)}.article-heading h1{font-size:clamp(38px,4vw,57px);max-width:22ch}.byline{font-size:14px;line-height:1.5;color:var(--quiet);display:flex;gap:22px;flex-wrap:wrap;margin:22px 0 0}.guide-section{margin-top:49px;scroll-margin-top:26px}.guide-section p{max-width:68ch}.source-notes{font-size:13px!important;line-height:1.6!important;color:var(--quiet);margin-top:24px;overflow-wrap:anywhere}.source-notes a{text-underline-offset:2px}.contents{font-size:14px;line-height:1.5}.contents h2{font-size:16px;letter-spacing:0;margin-bottom:16px}.contents ol{list-style:none;margin:0;padding:0}.contents li{padding:0;margin:0 0 13px}.contents a{display:block;color:var(--quiet);text-decoration:none;padding:3px 0}.contents a:hover{color:var(--ink);text-decoration:underline}.article-sidebar{padding-top:8px;align-self:start;position:sticky;top:28px}.mobile-contents{display:none}.checklist{list-style:none;padding-left:0;margin:25px 0}.checklist li{position:relative;padding-left:32px;margin:16px 0}.checklist li:before{content:'';position:absolute;left:1px;top:.53em;width:14px;height:14px;border:1.5px solid var(--quiet);border-radius:2px}.example{background:#f6f6f7;padding:24px 27px;margin:27px 0;border-radius:5px}.example p:last-child{margin:0}.example-label{font-size:14px;font-weight:650;margin-bottom:10px}.table-scroll{overflow-x:auto;max-width:100%;margin:26px 0}table{border-collapse:collapse;width:100%;font-size:16px;line-height:1.5;text-align:left}th,td{padding:15px 16px 15px 0;vertical-align:top;border-bottom:1px solid var(--rule)}th{font-weight:650}td{min-width:130px}.faq,.product-note,.all-sources,.related{margin-top:55px}.faq details{border-bottom:1px solid var(--rule)}.faq summary{font-weight:550;cursor:pointer;padding:19px 24px 19px 0;line-height:1.5}.faq details p{font-size:17px;line-height:1.7;color:var(--quiet);margin-top:0}.product-note{padding:32px;background:var(--ink);color:var(--white);border-radius:6px}.product-note h2{font-size:29px}.product-note p{font-size:17px}.action{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:11px 20px;background:var(--signal);color:var(--ink);border-radius:4px;text-decoration:none;font-size:16px;font-weight:650}.action:hover{background:#ff6d39;text-decoration:underline}.product-note .small{font-size:13px;margin:17px 0 0;color:#c6c8cb}.all-sources{padding-top:32px;border-top:1px solid var(--rule);font-size:15px;line-height:1.65}.all-sources h2,.related h2{font-size:23px}.all-sources a{overflow-wrap:anywhere}.related ul{list-style:none;padding:0}.related li{margin:12px 0;padding:0}.related a{font-size:17px}.method-page{max-width:800px;margin:57px auto 0;padding:0 25px}.method-page h1{font-size:48px}.method-page .guide-section{margin-top:38px}
html[lang^=zh] h1{line-height:1.28;letter-spacing:-.02em;max-width:14em}html[lang^=zh] .intro{line-height:1.85}html[lang^=zh] h2,html[lang^=zh] h3{line-height:1.5;letter-spacing:0}html[lang^=zh] .guide-section p{line-height:1.95}html[lang^=zh] .languages{font-family:'Host Grotesk','Fovumo Chinese',sans-serif}
@media(max-width:1250px){.site-footer{margin-left:44px;margin-right:44px}.article-layout{gap:45px;grid-template-columns:minmax(0,720px) 220px;padding:0 42px}}
@media(max-width:900px){.article-layout{display:block;max-width:800px;padding:0 30px}.article-sidebar{display:none}.mobile-contents{display:block;margin:30px 0 38px;padding-bottom:25px;border-bottom:1px solid var(--rule)}.mobile-contents .contents ol{columns:2;column-gap:28px}.contents li{break-inside:avoid}.site-header{padding:20px 28px;gap:25px}.brand img{width:140px;height:35px}.site-header .product-link{display:none}.site-footer{margin-left:30px;margin-right:30px}}
@media(max-width:560px){body{font-size:18px;line-height:1.7}.site-header{padding:15px 20px;gap:16px;align-items:center;flex-wrap:wrap}.brand img{width:128px;height:33px}.languages{gap:16px;font-size:13px;min-width:0}.languages a{padding:12px 0}.directory{padding:0 22px;margin-top:39px}.directory-intro{padding-bottom:18px}h1,.article-heading h1{font-size:39px;line-height:1.12;letter-spacing:-.04em;max-width:19ch;margin-bottom:22px}h2{font-size:27px}h3{font-size:23px}.intro{font-size:20px;line-height:1.6}.audience{font-size:14px;margin-bottom:14px}.directory-tools{display:block;margin-top:10px;padding-top:24px}.directory-tools h2{font-size:22px;margin-bottom:17px}.directory-tools label{display:block;width:100%}.guide-list a{padding:25px 0}.guide-list p{font-size:16px}.article-layout{margin-top:33px;padding:0 23px}.back{font-size:14px;margin-bottom:26px}.article-heading{padding-bottom:24px}.byline{font-size:13px;gap:8px 18px}.mobile-contents .contents ol{columns:1}.contents{font-size:15px}.contents a{padding:6px 0}.contents li{margin-bottom:7px}.guide-section{margin-top:38px}.example{padding:21px}.source-notes{font-size:12px!important;line-height:1.65!important}.table-scroll{margin:24px -3px}th,td{padding:12px 12px 12px 0;font-size:15px}.product-note{padding:26px 23px}.product-note h2{font-size:26px}.action{width:100%;text-align:center}.site-footer{margin:52px 23px 0;padding-top:24px;display:block}.site-footer span{margin:19px 0}.site-footer p{font-size:12px}.method-page{padding:0 23px;margin-top:35px}.method-page h1{font-size:39px}.faq,.product-note,.all-sources,.related{margin-top:40px}html[lang^=zh] h1{font-size:36px;line-height:1.4;max-width:none}html[lang^=zh] .intro{font-size:19px;line-height:1.9}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.site-header,.site-footer,.article-sidebar,.mobile-contents,.product-link,.languages{display:none}.article-layout{display:block;margin:0;padding:0;max-width:none}.guide-section{break-inside:avoid}.product-note{background:#fff;color:#111318;border:1px solid #62656b}.action{background:#fff;color:#111318}.product-note .small{color:#62656b}.table-scroll{overflow:visible}}

.languages a{display:inline-flex;align-items:center;min-height:44px}

.guide-section p,.guide-section ul,.product-note p,.faq p,.all-sources ul{max-width:34em}

.directory .intro,.guide-list p{max-width:34em}

@font-face{font-family:'Fovumo Traditional';src:url('/fonts/guides/noto-sans-tc-400.woff2?v=71700c1460be') format('woff2');font-weight:100 500;font-display:swap}
@font-face{font-family:'Fovumo Traditional';src:url('/fonts/guides/noto-sans-tc-600.woff2?v=e165b2cea55a') format('woff2');font-weight:600 900;font-display:swap}
html[lang^=zh-Hant]{font-family:'Fovumo Traditional','Host Grotesk',sans-serif}
.languages a[lang^=zh-Hans]{font-family:'Fovumo Chinese',sans-serif}
.languages a[lang^=zh-Hant]{font-family:'Fovumo Traditional',sans-serif}