@font-face{font-family:GuideBrand;src:url("/assets/marketing/help-center/21efe1559a026f9a.woff2") format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:Overpass;src:url("/assets/marketing/help-center/29217ef8adef5f6c.woff2") format("woff2");font-weight:100 900;font-display:swap}
:root{--paper:#faf9f6;--surface:#fff;--ink:#242328;--muted:#68656d;--line:#dedbde;--accent:#65518b;--tint:#f0edf5;--body:Overpass,"PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:105px}
body{margin:0;background-color:#080b13;background-image:url("/assets/marketing/help-center/92a9352757f50aa9.png");background-position:center top;background-size:cover;background-attachment:fixed;color:var(--ink);font:16px/1.85 'Overpass', var(--body);-webkit-font-smoothing:antialiased}
button,input{font:inherit}
a{color:var(--accent);text-underline-offset:4px;text-decoration-thickness:1px}
a:hover{text-decoration:underline}
button{color:inherit;cursor:pointer}
button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid var(--accent);outline-offset:4px}
[hidden]{display:none!important}
.skip-link{position:fixed;top:-100px;left:20px;z-index:100;background:white;padding:10px}
.skip-link:focus{top:10px}
.header{height:80px;position:sticky;top:0;z-index:20;background:rgba(250,249,246,.97);border-bottom:1px solid var(--line)}
.header-inner{height:100%;max-width:1360px;margin:auto;padding:0 44px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:7px;text-decoration:none;color:var(--ink)}
.brand img{width:25px;height:30px}
.brand span{font:600 28px/1 'Overpass', GuideBrand,sans-serif;letter-spacing:-1px;transform:translateY(3px)}
.header-name{font-size:15px;border-left:1px solid var(--line);padding-left:22px}
.search{position:relative;width:330px;margin-left:auto}
.search-field{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:7px 12px}
.search svg{width:18px;height:18px;flex-shrink:0;stroke:var(--muted)}
.search input{width:100%;padding:0;border:0;background:none;color:var(--ink);font-size:14px;outline:none}
.search-field:focus-within{border-color:var(--accent)}
.search input:focus-visible{outline:none}
.search-results{position:absolute;right:0;top:calc(100% + 8px);background:var(--surface);box-shadow:0 10px 35px #24232815;border:1px solid var(--line);border-radius:10px;width:440px;max-width:calc(100vw - 32px);max-height:60vh;overflow:auto;padding:8px}
.search-results a{display:block;padding:10px 12px;text-decoration:none;border-radius:6px;font-size:14px;color:var(--ink)}
.search-results a:hover,.search-results a:focus{background:var(--tint)}
.search-results small{display:block;color:var(--muted);font-size:11px}
.search-empty{margin:6px 10px;color:var(--muted);font-size:14px}
.mobile-toggle{display:none}
.layout{display:grid;grid-template-columns:246px minmax(0,1fr);gap:64px;max-width:1272px;margin:0 auto;padding:48px 44px 96px}
.sidebar{position:sticky;top:110px;align-self:start;max-height:calc(100vh - 138px);overflow:auto;padding-right:15px;scrollbar-width:thin}
.nav-group{margin:0 0 15px}
.nav-group summary{display:flex;align-items:center;gap:8px;cursor:pointer;list-style:none;font-size:14px;font-weight:600;padding:7px 0}
.nav-group summary::-webkit-details-marker{display:none}
.nav-group summary a{color:var(--ink);text-decoration:none;flex:1}
.nav-group summary>span{font-size:17px;color:var(--muted);transform:rotate(-90deg)}
.nav-group[open] summary>span{transform:none}
.nav-items{display:grid;margin-top:3px;border-left:1px solid var(--line)}
.nav-items>a{position:relative;display:block;padding:8px 8px 8px 15px;font-size:12px;line-height:1.7;color:var(--muted);text-decoration:none}
.nav-items>a:hover{color:var(--accent)}
.nav-items>a[aria-current=location]{background:var(--tint);color:var(--accent)}
.nav-items>a[aria-current=location]:before{content:"";position:absolute;left:-1px;top:0;bottom:0;width:2px;background:var(--accent)}
.main{min-width:0;max-width:840px}
.collection{scroll-margin-top:110px;margin-bottom:76px}
.collection:last-child{margin-bottom:0}
.collection>h2{font-size:32px;line-height:1.4;letter-spacing:-.7px;font-weight:600;margin:0 0 26px}
.collection>p{margin:10px 0 20px}
.collection>.body-label{font-size:19px;font-weight:600}
.overview{margin-bottom:27px}
.overview>h3{font-size:24px;font-weight:600;letter-spacing:-.4px;line-height:1.55;margin:0 0 24px}
.overview-point{margin:0 0 25px}
.overview-point h4{font-size:17px;font-weight:600;line-height:1.6;margin:0 0 7px}
.overview-point p{margin:0 0 8px;font-size:15px;line-height:1.95}
.overview-point .example{color:var(--muted);font-size:14px;margin-top:9px}
.overview-point a{font-weight:500}
.question{border-top:1px solid var(--line);scroll-margin-top:105px}
.question:last-child{border-bottom:1px solid var(--line)}
.question>summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:21px 0;cursor:pointer}
.question>summary::-webkit-details-marker{display:none}
.question>summary h3{font-size:17px;font-weight:500;line-height:1.6;margin:0}
.question>summary:hover h3{color:var(--accent)}
.question[open]>summary h3{font-weight:600;color:var(--accent)}
.question-toggle{display:block;position:relative;width:14px;height:14px;flex-shrink:0;margin-right:2px}
.question-toggle:before,.question-toggle:after{content:"";position:absolute;background:var(--muted);left:0;right:0;top:6px;height:1.5px;transition:transform .2s}
.question-toggle:after{transform:rotate(90deg)}
.question[open] .question-toggle:after{transform:rotate(0)}
.answer{padding:1px 0 28px;font-size:15px;line-height:1.95;animation:enter .2s ease-out}
.answer>p{margin:0 0 16px}
.answer h4{font-size:17px;margin:28px 0 12px;font-weight:600;scroll-margin-top:115px}
.body-label{font-weight:600}
.meta{font-size:13px;color:var(--muted)}
.answer .meta:has(a){display:flex;gap:20px;flex-wrap:wrap}
.answer>p a+a{margin-left:14px}
.answer ol{padding-left:24px}
.answer li{padding-left:5px;margin-bottom:8px}
.answer figure{margin:22px 0}
.answer figure+figure{margin-top:10px}
.image-button{display:block;border:1px solid var(--line);border-radius:9px;padding:0;overflow:hidden;width:100%;background:white;cursor:zoom-in}
.image-button img{display:block;width:100%;height:auto}
.code{white-space:pre-wrap;font-family:'Overpass', ui-monospace,monospace}
.question-formula{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:20px 0;font-size:12px;line-height:1.7}
.question-formula span{padding:4px 8px;background:var(--tint);color:var(--accent);border-radius:4px}
.question-formula b{font-weight:400;color:var(--muted)}
.prompt-card{border:1px solid #65518b35;background:var(--paper);border-radius:12px;overflow:hidden;margin:22px 0 6px}
.prompt-head{padding:15px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line)}
.prompt-head>span{font-size:13px;font-weight:600}
.copy-button{display:flex;align-items:center;gap:8px;flex-shrink:0;font-size:12px;line-height:1.6;min-height:36px;padding:7px 12px;border:1px solid var(--line);background:var(--surface);border-radius:6px;color:var(--accent)}
.copy-button:hover{background:var(--tint);border-color:var(--accent)}
.prompt-text{font-size:14px;line-height:1.95;padding:20px;margin:0;color:var(--ink);overflow-wrap:anywhere;user-select:text}
.prompt-foot{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:11px;color:var(--muted);padding:0 20px 18px}
.prompt-status{color:var(--accent)}
.case-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:27px 0 22px}
.case-card{text-decoration:none;color:var(--ink);min-width:0}
.case-cover{height:152px;border:1px solid var(--line);border-radius:8px;background:var(--surface);overflow:hidden}
.case-cover img{width:100%;height:100%;object-fit:contain;display:block;transition:transform .25s ease}
.case-card h3{font-size:15px;line-height:1.75;font-weight:600;margin:13px 0 0;display:flex;gap:7px}
.case-card h3 span{font-size:15px;color:var(--accent);flex-shrink:0;margin-left:auto}
.case-card:hover{text-decoration:none;color:var(--accent)}
.case-card:hover img{transform:scale(1.035)}
.footer{border-top:1px solid var(--line);max-width:1184px;margin:0 auto 26px;padding-top:20px;font-size:12px;color:var(--muted);display:flex;justify-content:space-between}
.footer a{text-decoration:none}
.image-dialog{border:0;border-radius:12px;padding:18px;max-width:95vw;max-height:94vh;background:var(--surface);overflow:auto}
.image-dialog::backdrop{background:#242328aa}
.image-dialog img{display:block;max-width:calc(95vw - 36px);max-height:calc(92vh - 65px);object-fit:contain}
.image-dialog button{display:block;margin:0 0 12px auto;border:1px solid var(--line);border-radius:6px;background:var(--paper);padding:3px 13px;font-size:13px}
.case-view> :not(#case-frame):not(script){display:none!important}
#case-frame:not([hidden]){display:block;position:fixed;inset:0;width:100%;height:100%;border:0;background:var(--paper);z-index:50}
@keyframes enter{from{opacity:.5;transform:translateY(3px)}to{opacity:1;transform:none}}
@media(max-width:1050px){.layout{gap:35px;padding-inline:30px;grid-template-columns:215px minmax(0,1fr)}.header-inner{padding:0 30px}.case-grid{gap:12px}.case-cover{height:128px}.case-card h3{font-size:14px}.footer{margin-inline:30px}}
@media(max-width:760px){
 html{scroll-padding-top:138px}.header{height:auto}.header-inner{min-height:116px;gap:13px;flex-wrap:wrap;padding:14px 20px 12px}.brand span{font-size:25px}.brand img{width:23px;height:27px}.header-name{font-size:13px;padding-left:13px}.search{order:4;width:100%;margin:0}.search-results{width:100%}.search-field{padding:6px 11px}.mobile-toggle{display:block;margin-left:auto;border:0;background:none;padding:5px 0 5px 12px;font-size:13px}.layout{display:block;padding:30px 22px 60px}.sidebar{display:none;position:fixed;z-index:25;top:116px;bottom:0;left:0;max-height:none;width:min(340px,90vw);padding:22px;background:var(--paper);box-shadow:15px 0 30px #24232812}.sidebar.is-open{display:block}.nav-items>a{font-size:14px;padding-block:9px}.nav-group summary{font-size:16px}.collection{margin-bottom:54px;scroll-margin-top:145px}.collection>h2{font-size:27px;margin-bottom:23px}.overview>h3{font-size:21px}.overview-point p{font-size:14px}.overview-point h4{font-size:16px}.question{scroll-margin-top:140px}.question>summary{padding:19px 0}.question>summary h3{font-size:16px}.answer{font-size:14px}.answer h4{font-size:16px;scroll-margin-top:143px}.case-grid{grid-template-columns:1fr;gap:26px}.case-cover{height:auto;aspect-ratio:1.8}.case-card h3{font-size:17px}.footer{margin:0 22px 24px}.image-dialog{padding:12px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}
@media(max-width:400px){.prompt-head{padding:13px 12px;gap:7px}.prompt-head>span{font-size:12px}.copy-button{padding-inline:8px}.prompt-text{padding:16px}.prompt-foot{padding-inline:16px}.question-formula{gap:5px;font-size:11px}.question-formula span{padding-inline:6px}}
@media print{.header,.sidebar,.footer,.image-dialog{display:none!important}.layout{display:block;max-width:none;padding:0}.collection{break-before:page}.collection:first-child{break-before:auto}.question>summary{break-after:avoid}.answer{display:block!important}.case-grid{break-inside:avoid}}