/* Docbase layout and assets,adapted for the JustPiano Chinese help center. */
/* Shared color roles keep the reading UI consistent across both appearances. */
:root{
  color-scheme:light;
  --accent:#087f73;--accent-hover:#095c54;--mint:#08beab;
  --ink:#172f2d;--body-text:#42534d;--muted:#61716f;--line:#e3ebe8;
  --page:#fff;--surface:#fff;--soft:#f5faf8;--surface-subtle:#fbfdfc;
  --header:rgba(255,255,255,.97);--accent-soft:#e7f8f1;--accent-line:#c9e5da;
  --hover:#dff3eb;--button-text:#fff;--selection:#c6f3e8;
  --hero:linear-gradient(108deg,#f0fcf8 0%,#dafff2 45%,#d3faf3 65%,#f7fdfb 100%);
  --heading:linear-gradient(110deg,#effaf5,#e5f8f2);
  --code-bg:#edf3f0;--code-text:#287766;
  --info-bg:#f0f9f4;--info-line:#cfe8db;--info-title:#28735a;
  --warning-bg:#fffaee;--warning-line:#eedfae;--warning-title:#816516;
  --table-head:#edf6f1;--table-text:#355c49;--highlight-bg:#d7f3e8;--highlight-text:#165d43;
  --shadow:0 8px 24px rgba(40,112,87,.06);
  --error:#b42318;
  --font:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
/* Screen-only overrides preserve a light, ink-friendly print stylesheet. */
@media screen{:root[data-theme="dark"]{
    color-scheme:dark;
    --accent:#65ddc4;--accent-hover:#9aeedc;--mint:#43cbb0;
    --ink:#e6f1ed;--body-text:#c4d4ce;--muted:#a0b5ac;--line:#334a41;
    --page:#111c1a;--surface:#192823;--soft:#1d3029;--surface-subtle:#16241f;
    --header:rgba(17,28,26,.97);--accent-soft:#203d32;--accent-line:#3d6655;
    --hover:#294b3e;--button-text:#102720;--selection:#305d4e;
    --hero:linear-gradient(108deg,#152923 0%,#1d3c31 45%,#193a31 65%,#142820 100%);
    --heading:linear-gradient(110deg,#192e26,#20392e);
    --code-bg:#20362c;--code-text:#96e2c2;
    --info-bg:#1b3228;--info-line:#3c6350;--info-title:#94deba;
    --warning-bg:#352d1c;--warning-line:#76633a;--warning-title:#ebcf80;
    --table-head:#233b2f;--table-text:#c5e4d3;--highlight-bg:#345b46;--highlight-text:#e1f7b7;
    --shadow:0 8px 24px rgba(0,0,0,.16);
    --error:#ffb4a6;
  }
}
html{scroll-behavior:smooth;scroll-padding-top:110px}
body{font-family:var(--font);color:var(--ink);background:var(--page);font-size:16px;line-height:1.7}
body h1,body h2,body h3,body h4,body h5,body h6,body input,body button,body select,body a{font-family:var(--font)}
body h1,body h2,body h3,body h4,body h5,body h6{color:var(--ink)}
body a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--accent);outline-offset:4px}
button,input,select{font:inherit}
button,a,summary{-webkit-tap-highlight-color:transparent}
button{cursor:pointer}
::selection{background:var(--selection);color:var(--ink)}
[hidden]{display:none!important}
.container{max-width:1180px}
.skip-link{position:fixed;top:-80px;left:20px;z-index:100;background:var(--ink);color:var(--page);padding:12px 18px;border-radius:8px}
.skip-link:focus{top:12px;color:var(--page)}
.site-header{position:sticky;top:0;z-index:30;background:var(--header);border-bottom:1px solid var(--line)}
.header-inner{height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand img{border-radius:11px;object-fit:contain}
.brand>span{font-weight:750;font-size:21px;letter-spacing:.02em;line-height:1.35}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.045em;margin-top:4px}
.site-nav{margin-left:auto;display:flex;align-items:center;gap:32px}
.site-nav a{font-size:14px;font-weight:600;position:relative;padding:12px 0;color:var(--body-text);white-space:nowrap}
.site-nav a:hover,.site-nav a[aria-current]{color:var(--accent)}
.site-nav a[aria-current]:after{content:"";position:absolute;bottom:1px;left:0;right:0;height:2px;background:var(--mint)}
.download-link.common-btn.btn-style-6{color:var(--ink);font-size:13px;border-color:var(--ink);padding:10px 20px;border-radius:8px;min-height:44px;white-space:nowrap;display:flex;align-items:center;gap:12px}
.download-link.common-btn.btn-style-6:hover{color:var(--ink);background:var(--accent-soft);border-color:var(--accent)}
.mobile-menu-toggle{display:none;border:1px solid var(--line);border-radius:8px;background:var(--surface);width:44px;height:44px;font-size:25px;color:var(--ink)}
.eyebrow{font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--accent);display:block;margin-bottom:14px}
.search-form{display:flex;align-items:center;background:var(--surface);border:1px solid var(--accent-line);box-shadow:var(--shadow);border-radius:8px;padding:8px;max-width:700px;margin:0 auto;gap:14px;text-align:left}
.search-form>.bi-search{font-size:20px;color:var(--muted);margin-left:14px;flex-shrink:0}
.search-form input{border:0;min-width:0;width:100%;padding:10px 0;background:transparent;font-size:16px;color:var(--ink)}
.search-form input::placeholder{color:var(--muted);font-size:14px}
.search-form button{min-height:44px;border:0;background:var(--accent);color:var(--button-text);padding:12px 26px;white-space:nowrap;border-radius:5px;font-size:14px;font-weight:600;display:flex;gap:12px;align-items:center;transition:background .2s}
.search-form button:hover{background:var(--accent-hover)}
.primary-button{display:inline-flex;align-items:center;justify-content:center;gap:16px;min-height:46px;padding:12px 22px;background:var(--accent);color:var(--button-text);font-size:14px;font-weight:600;border:0;border-radius:5px;white-space:nowrap;transition:background .2s,transform .2s}
.primary-button:hover{background:var(--accent-hover);color:var(--button-text);transform:translateY(-1px)}
.section-space{padding-top:76px;padding-bottom:76px}
.section-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px}
.section-heading h2{font-size:24px;font-weight:700;line-height:1.55;letter-spacing:.02em}
.text-link{font-size:13px;color:var(--accent);font-weight:600;display:inline-flex;gap:12px;align-items:center;min-height:44px}
.text-link:hover{color:var(--accent-hover);text-decoration:underline;text-underline-offset:5px}
.faq-list details{background:var(--surface);border:1px solid var(--line);border-radius:6px;margin-bottom:12px}
.faq-list summary{padding:21px 52px 21px 22px;font-size:14px;font-weight:600;cursor:pointer;position:relative;list-style:none;line-height:1.7}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary:after{content:"+";position:absolute;right:22px;top:20px;font-size:18px;color:var(--accent);font-weight:400}
.faq-list details[open] summary:after{content:"−"}
.faq-list details[open] summary{color:var(--accent)}
.faq-list details>div{padding:0 22px 22px;font-size:14px;color:var(--muted)}
.faq-list details a{color:var(--accent);font-size:13px;display:inline-block;padding-top:10px}
.site-footer{border-top:1px solid var(--line);padding:32px 0}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:24px}
.footer-brand{font-size:14px;font-weight:600;color:var(--muted)}
.footer-inner nav{display:flex;flex-wrap:wrap;gap:4px 24px;font-size:13px;color:var(--body-text)}
.footer-inner a:hover{color:var(--accent)}
.page-heading{padding:36px 0 40px;background:var(--heading);border-bottom:1px solid var(--line)}
.breadcrumbs{display:flex;align-items:center;flex-wrap:wrap;gap:12px;color:var(--muted);font-size:12px;line-height:1.8}
.breadcrumbs i{font-size:9px}
.breadcrumbs a:hover{color:var(--accent)}
.page-heading h1{font-size:34px;font-weight:700;margin:22px 0 10px}
.page-heading h1+p{color:var(--muted);font-size:14px}
.search-compact{max-width:440px;margin:24px 0 0;box-shadow:none;padding:5px;gap:10px}
.search-compact input{font-size:13px;padding:6px 0}
.search-compact button{padding:9px 15px;font-size:12px}
.search-compact>.bi-search{font-size:15px;margin-left:10px}
.document-catalog{padding-top:45px}
.document-catalog>section+section{margin-top:48px}
.catalog-heading{display:flex;align-items:center;gap:14px;margin-bottom:20px}
.catalog-heading>span{font-size:12px;font-weight:700;color:var(--accent);background:var(--accent-soft);padding:5px 9px;border-radius:5px}
.catalog-heading h2{font-size:21px;font-weight:650}
.catalog-heading p{font-size:13px;color:var(--muted)}
.catalog-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.catalog-article{display:flex;align-items:flex-start;gap:16px;border:1px solid var(--line);border-radius:6px;padding:25px;transition:background .2s,border-color .2s}
.catalog-article:hover{border-color:var(--accent-line);background:var(--soft)}
.catalog-article>.bi{font-size:21px;color:var(--accent)}
.catalog-article>div{flex:1}
.catalog-article h3{font-size:17px;font-weight:600;line-height:1.6}
.catalog-article p{font-size:13px;color:var(--muted);margin:10px 0 14px}
.catalog-article span{font-size:11px;color:var(--muted)}
.catalog-article>.bi-arrow-right{font-size:16px}
.faq-page{max-width:860px;padding-top:45px}
.feedback-page.container{max-width:760px;padding-top:32px;padding-bottom:64px}
.feedback-heading{margin:28px 0 32px}
.feedback-heading h1{font-size:34px;font-weight:700;margin-bottom:12px}
.feedback-heading p{font-size:14px;color:var(--muted)}
.feedback-form{padding:28px;border:1px solid var(--line);border-radius:8px;background:var(--surface)}
.feedback-form fieldset{min-width:0;padding:0;margin:0;border:0}
.feedback-field+.feedback-field{margin-top:24px}
.feedback-field label{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;margin-bottom:10px}
.feedback-field label span{font-size:11px;font-weight:400;color:var(--muted)}
.feedback-field input,.feedback-field textarea{display:block;width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:5px;background:var(--surface-subtle);color:var(--ink);font:inherit;font-size:16px;line-height:1.7}
.feedback-field textarea{min-height:190px;resize:vertical}
.feedback-field input::placeholder,.feedback-field textarea::placeholder{color:var(--muted);opacity:1}
.feedback-field textarea:focus-visible{outline:3px solid var(--accent);outline-offset:4px}
.feedback-field-note{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-top:10px;font-size:12px;color:var(--muted)}
.feedback-field-note p{margin:0}
#feedback-count{flex-shrink:0;font-variant-numeric:tabular-nums}
.feedback-actions{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:28px}
.feedback-form :disabled{cursor:wait;opacity:.7}
.feedback-form .primary-button:disabled{transform:none;background:var(--accent)}
.feedback-status{min-height:24px;margin:18px 0 0;font-size:13px;color:var(--muted);overflow-wrap:anywhere}
.feedback-status[data-state="success"]{color:var(--accent)}
.feedback-status[data-state="error"]{color:var(--error)}
@media(max-width:767px){
  .feedback-page.container{padding-top:24px;padding-bottom:40px}
  .feedback-heading{margin:24px 0}
  .feedback-heading h1{font-size:28px}
  .feedback-form{padding:20px}
  .feedback-field-note{flex-wrap:wrap;gap:4px}
  #feedback-count{margin-left:auto}
}
.article-top{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:22px;padding-bottom:22px}
.article-top .search-compact{margin:0;width:320px;flex-shrink:0}
.article-layout{display:grid;grid-template-columns:205px minmax(0,1fr) 180px;gap:32px;align-items:start;padding-top:18px;padding-bottom:65px}
.article-sidebar,.article-toc{position:sticky;top:115px;max-height:calc(100dvh - 140px);overflow-y:auto;scrollbar-width:thin}
.article-sidebar nav>section{margin-bottom:27px}
.article-sidebar h2{font-size:13px;font-weight:700;margin-bottom:10px;padding-left:12px}
.article-sidebar ul,.article-toc ul{padding:0;margin:0;list-style:none}
.article-sidebar a{display:block;font-size:12px;padding:10px 12px;border-radius:4px;margin:2px 0;color:var(--muted);line-height:1.7}
.article-sidebar a:hover{background:var(--soft);color:var(--accent)}
.article-sidebar a[aria-current]{background:var(--accent-soft);color:var(--accent);font-weight:650;border-left:3px solid var(--mint);padding-left:9px}
.article-main{min-width:0;border-left:1px solid var(--line);padding-left:30px}
.article-category{display:inline-block;font-size:11px;color:var(--accent);background:var(--accent-soft);padding:3px 10px;border-radius:4px;margin-bottom:15px}
.article-body{font-size:14px;line-height:1.9;color:var(--body-text);overflow-wrap:anywhere}
.article-body h1{font-size:30px;line-height:1.5;font-weight:750;margin:0 0 12px;letter-spacing:-.02em}
.article-body h2{font-size:22px;font-weight:650;line-height:1.65;margin:38px 0 18px;padding-top:8px;border-top:1px solid var(--line)}
.article-body h3{font-size:18px;line-height:1.7;font-weight:650;margin:28px 0 14px}
.article-body p{margin:15px 0}
.article-body ul,.article-body ol{padding-left:23px;margin:16px 0;list-style:revert}
.article-body li{margin:7px 0;list-style:inherit}
.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--accent-hover)}
.help-source-date{font-size:12px;color:var(--muted);margin:0 0 26px!important}
.article-body strong{font-weight:650;color:var(--ink)}
.article-body code{font:12px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace;background:var(--code-bg);color:var(--code-text);border-radius:3px;padding:2px 5px;word-break:break-word}
.article-body pre{background:var(--soft);border:1px solid var(--line);border-radius:5px;padding:18px;overflow:auto}
.article-body pre code{padding:0;background:none;white-space:pre}
.custom-block{border:1px solid var(--info-line);background:var(--info-bg);border-radius:6px;padding:15px 18px;margin:24px 0}
.custom-block.warning{background:var(--warning-bg);border-color:var(--warning-line)}
.custom-block-title{font-weight:650;color:var(--info-title);margin:0 0 6px!important}
.warning .custom-block-title{color:var(--warning-title)}
.custom-block p{margin:6px 0}
.custom-block p:last-child{margin-bottom:0}
.help-table-wrap{width:100%;overflow-x:auto;margin:22px 0;border:1px solid var(--line);border-radius:6px;overscroll-behavior-inline:contain}
.help-table{width:100%;border-collapse:collapse;font-size:12px;line-height:1.75;margin:0}
.help-table th,.help-table td{padding:12px 14px;border-bottom:1px solid var(--line);border-right:1px solid var(--line);text-align:left;vertical-align:top}
.help-table th:last-child,.help-table td:last-child{border-right:0}
.help-table tr:last-child td,.help-table tr:last-child th{border-bottom:0}
.help-table thead{background:var(--table-head);color:var(--table-text)}
.help-table th{font-weight:600}
.help-table tbody tr:nth-child(even){background:var(--surface-subtle)}
.help-table--songs{min-width:840px;font-variant-numeric:tabular-nums}
.help-table--songs th,.help-table--songs td{white-space:nowrap}
.help-table--songs td:nth-child(2){white-space:normal;min-width:230px}
.help-table--assets{min-width:580px}
.help-table--app{min-width:450px}
.help-table--assets th{width:200px}
.help-figure{margin:24px 0;background:var(--soft);border:1px solid var(--line);border-radius:6px;padding:12px}
.help-figure img{display:block;max-width:100%;height:auto;margin:auto;border-radius:3px}
.help-figure p{margin:0}
.help-figure figcaption{font-size:11px;color:var(--muted);text-align:center;margin-top:10px;line-height:1.7}
.help-figure--narrow img{max-height:400px}
.app-guide-visuals{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0}
.app-guide-visuals .help-figure{margin:0;padding:8px}
.app-guide-overview,.app-guide-option-grid,.app-guide-limit-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:22px 0}
.app-guide-overview>div,.app-guide-option-grid>div,.app-guide-limit-grid>div{border:1px solid var(--line);border-radius:5px;padding:15px;background:var(--surface-subtle)}
.app-guide-overview span,.app-guide-limit-grid span{display:block;font-size:10px;letter-spacing:.08em;color:var(--accent)}
.app-guide-overview strong,.app-guide-limit-grid strong{display:block;margin-top:4px}
.app-guide-overview p,.app-guide-option-grid p{font-size:12px;line-height:1.8;margin:6px 0 0}
.article-body details{border:1px solid var(--line);padding:13px 16px;border-radius:5px;margin:12px 0}
.article-body summary{cursor:pointer;color:var(--ink);font-weight:600}
.article-body details p{margin-bottom:0}
.article-pagination{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-top:24px;margin-top:40px;font-size:13px;color:var(--accent)}
.article-pagination a:last-child{text-align:right}
.article-pagination span{display:block;font-size:11px;color:var(--muted);margin-bottom:7px}
.article-feedback{background:var(--soft);padding:18px;margin-top:30px;font-size:12px;color:var(--muted);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between}
.article-feedback a{color:var(--accent)}
.article-toc{border-left:1px solid var(--line);padding-left:18px}
.article-toc h2{font-size:12px;margin-bottom:12px;font-weight:650}
.article-toc li a{display:block;font-size:11px;line-height:1.65;padding:6px 0;color:var(--muted)}
.article-toc a:hover,.article-toc a[aria-current]{color:var(--accent)}
.article-toc li.toc-level-3{padding-left:10px}
.article-toc .toc-top{display:block;font-size:11px;color:var(--muted);margin-top:18px;padding-top:18px;border-top:1px solid var(--line)}
.mobile-doc-nav{display:none}
.search-page{max-width:850px;padding-top:35px;padding-bottom:70px;min-height:420px}
#search-status{font-size:14px;color:var(--muted);margin-bottom:25px}
.search-result{display:block;padding:25px 0;border-bottom:1px solid var(--line)}
.search-result:hover h2{color:var(--accent)}
.search-result h2{font-size:20px;font-weight:650;line-height:1.6}
.result-section{display:block;font-size:12px;color:var(--accent);margin:6px 0 10px}
.search-result p{font-size:14px;line-height:1.9;color:var(--muted);overflow-wrap:anywhere}
.search-result mark{background:var(--highlight-bg);color:var(--highlight-text);padding:0 2px;border-radius:2px}
#search-results>.text-link{margin-left:15px}
.not-found{text-align:center;padding-top:110px;padding-bottom:130px}
.not-found h1{font-size:36px;font-weight:700}
.not-found p{margin:20px 0 30px;color:var(--muted)}
@media(min-width:1400px){.container{max-width:1240px}
.article-layout{grid-template-columns:220px minmax(0,1fr) 190px;gap:35px}
}
@media(max-width:1199px){.container{width:calc(100% - 48px)}
.header-inner{gap:16px}
.site-nav{gap:22px}
.download-link.common-btn.btn-style-6{padding:9px 14px}
.article-layout{grid-template-columns:190px minmax(0,1fr);gap:26px}
.article-toc{display:none}
.article-main{padding-left:24px}
}
@media(max-width:991px){.header-inner{height:78px}
.site-nav{gap:20px}
.brand>span{font-size:18px}
.brand img{width:36px;height:36px}
.brand small{font-size:10px}
.download-link.common-btn.btn-style-6{font-size:12px}
.section-space{padding:60px 0}
.article-top{align-items:flex-start;flex-direction:column;gap:16px}
.article-top .search-compact{width:100%;max-width:100%}
.article-layout{grid-template-columns:175px minmax(0,1fr);gap:18px}
.article-main{padding-left:18px}
.article-body h1{font-size:27px}
.footer-inner{flex-wrap:wrap}
.app-guide-visuals{grid-template-columns:1fr}
}
@media(max-width:767px){html{scroll-padding-top:92px}
.container{width:calc(100% - 36px);padding-left:0;padding-right:0}
.header-inner{height:72px;gap:12px}
.brand{gap:9px}
.brand>span{font-size:18px}
.brand small{font-size:9px}
.mobile-menu-toggle{display:block;margin-left:auto;order:3}
.site-nav{margin-left:0;display:none;position:absolute;left:0;right:0;top:72px;background:var(--surface);border-bottom:1px solid var(--line);padding:15px 24px;box-shadow:var(--shadow)}
.site-nav.is-open{display:flex;flex-direction:column;gap:3px;align-items:stretch}
.site-nav a{padding:11px 0}
.site-nav a[aria-current]:after{display:none}
.download-link.common-btn.btn-style-6{font-size:11px;gap:7px;padding:8px 12px;border-radius:13px 0 13px 13px;min-height:40px}
.search-form{padding:6px;gap:10px}
.search-form>.bi-search{font-size:17px;margin-left:9px}
.search-form input{font-size:16px;padding:8px 0}
.search-form input::placeholder{font-size:14px}
.search-form button{padding:11px 15px;font-size:12px;gap:8px}
.search-form button .bi{display:none}
.section-space{padding:44px 0}
.section-heading{margin-bottom:24px;gap:12px;align-items:center}
.section-heading h2{font-size:23px}
.section-heading>.text-link{font-size:11px;gap:6px;white-space:nowrap}
.row{--bs-gutter-x:0}
.faq-list summary{font-size:13px;padding:18px 42px 18px 18px}
.faq-list summary:after{top:17px;right:18px}
.faq-list details>div{padding:0 18px 18px;font-size:13px}
.site-footer{padding:26px 0}
.footer-inner{gap:20px}
.footer-brand{font-size:14px}
.footer-inner nav{gap:4px 16px;font-size:12px}
.page-heading{padding:24px 0 28px}
.page-heading h1{font-size:28px;margin:18px 0 10px}
.page-heading h1+p{font-size:13px}
.breadcrumbs{font-size:10px;gap:8px}
.catalog-heading{flex-wrap:wrap;gap:10px}
.catalog-heading h2{font-size:19px}
.catalog-heading p{width:100%;font-size:12px}
.catalog-grid{grid-template-columns:1fr;gap:12px}
.catalog-article{padding:20px;gap:12px}
.catalog-article h3{font-size:16px}
.catalog-article p{font-size:12px}
.document-catalog>section+section{margin-top:36px}
.article-top{padding-top:20px;padding-bottom:18px;gap:16px}
.article-layout{display:block;padding-top:0}
.article-sidebar{position:static;max-height:none;margin-bottom:24px}
.desktop-doc-nav{display:none}
.mobile-doc-nav{display:block;border:1px solid var(--line);background:var(--soft);border-radius:5px}
.mobile-doc-nav summary{padding:13px 16px;font-size:13px;font-weight:600;cursor:pointer}
.mobile-doc-nav nav{padding:12px}
.article-sidebar nav>section{margin-bottom:16px}
.article-sidebar a{min-height:44px;font-size:13px}
.article-main{border:0;padding:0}
.article-category{font-size:10px}
.article-body h1{font-size:28px}
.article-body{font-size:14px;line-height:1.95}
.article-body h2{font-size:21px;margin-top:32px}
.article-body h3{font-size:17px}
.help-source-date{font-size:11px}
.custom-block{padding:14px;font-size:13px}
.help-figure{padding:8px}
.app-guide-overview,.app-guide-option-grid{gap:8px}
.app-guide-overview>div,.app-guide-option-grid>div{padding:12px}
.app-guide-overview strong,.app-guide-option-grid strong{font-size:13px}
.article-pagination{font-size:12px;gap:15px}
.article-feedback{padding:15px;font-size:11px}
.search-page{padding-top:28px;min-height:400px}
.search-result h2{font-size:18px}
.search-result p{font-size:13px}
.not-found{padding:80px 0}
.not-found h1{font-size:28px}
}
/* Native selection supports keyboard navigation and the mobile picker. */
.theme-control{display:flex;align-items:center;position:relative;flex-shrink:0;color:var(--muted)}
.theme-control>.bi{position:absolute;left:12px;pointer-events:none;font-size:16px}
.theme-control select{min-height:44px;width:137px;padding:8px 8px 8px 35px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font-size:13px;cursor:pointer}
.theme-control select:hover{border-color:var(--accent)}
.site-nav .nav-download{display:none}
@media(max-width:991px){.header-inner{gap:12px}
.site-nav{gap:18px}
.theme-control select{width:128px}
}
@media(max-width:767px){.download-link.common-btn.btn-style-6{display:none}
.site-nav .nav-download{display:block}
.theme-control{margin-left:auto}
.theme-control>.bi{display:none}
.theme-control select{width:104px;padding-left:9px;font-size:12px}
.header-inner{gap:8px}
.mobile-menu-toggle{margin-left:0;flex-shrink:0}
}
@media(max-width:400px){.brand img{width:32px;height:32px}
.brand>span{font-size:16px}
.brand small{font-size:8px}
.brand{gap:7px}
}
@media(max-width:359px){.brand small{display:none}
}
/* Home: search, document topics, and quick answers. */
.help-hero{padding:48px 0 32px;background:var(--hero)}
.home-search-content{max-width:960px;text-align:center}
.help-hero h1{font-size:36px;line-height:1.4;font-weight:700;letter-spacing:.02em;margin:0 0 24px;text-wrap:balance}
.help-hero .search-form{box-shadow:none}
.popular-searches{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:0 24px;margin-top:12px;font-size:14px;color:var(--body-text)}
.popular-searches a{display:inline-flex;align-items:center;min-height:44px}
.popular-searches a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px}
.getting-started,.support-line{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:0 8px;font-size:14px;color:var(--muted)}
.getting-started{margin-top:8px}
.getting-started .text-link,.support-line .text-link{font-size:14px;gap:8px}
.help-home .section-space{padding:48px 0}
.topic-card{height:100%;padding:24px;border:1px solid var(--line);border-radius:8px;background:var(--surface)}
.topic-card-heading{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.topic-card-heading h3{font-size:18px;font-weight:650;line-height:1.5}
.topic-icon{display:flex;align-items:center;justify-content:center;width:36px;height:36px;flex-shrink:0;border-radius:8px;background:var(--accent-soft)}
.topic-icon img{width:24px;height:24px}
.topic-links{padding:0;margin:0;list-style:none}
.topic-links a{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:48px;padding:12px 0;font-size:14px;line-height:1.6;color:var(--body-text)}
.topic-links a:hover{color:var(--accent)}
.topic-links .bi{font-size:11px;color:var(--muted);flex-shrink:0}
.faq-section{background:var(--soft);border-top:1px solid var(--line)}
.help-home .faq-list details{margin-bottom:0;border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent}
.help-home .faq-list summary{padding:20px 36px 20px 0;font-size:15px}
.help-home .faq-list summary:after{right:4px}
.help-home .faq-list details>div{padding:0 36px 20px 0;color:var(--body-text)}
.support-line{margin-top:24px}
.footer-inner nav a{display:inline-flex;align-items:center;gap:4px;min-height:44px}
@media(max-width:991px){.topic-card{padding:20px}
}
@media(max-width:767px){
  .help-hero{padding:36px 0 24px}
  .help-hero h1{font-size:28px;margin-bottom:20px}
  .popular-searches{gap:0 16px;font-size:13px}
  .help-home .section-space{padding:32px 0}
  .help-home .section-heading{margin-bottom:16px}
  .help-home .section-heading .text-link{font-size:13px}
  .topic-card{padding:20px}
  .topic-card-heading{margin-bottom:8px}
  .support-line{margin-top:20px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}
*,*:before,*:after{animation:none!important;transition:none!important}
}
@media print{.site-header,.site-footer,.article-sidebar,.article-toc,.article-top,.article-pagination,.article-feedback,.skip-link{display:none!important}
.container{width:100%;max-width:none}
.article-layout{display:block;padding:0}
.article-main{border:0;padding:0}
.help-table-wrap{overflow:visible}
.help-table{min-width:0;white-space:normal}
.article-body details>*{display:block}
.article-body img{max-height:500px;width:auto}
.article-body h2,.article-body h3{break-after:avoid}
}