:root{
  --wb-paper:#f5f7f0; --wb-ink:#11130e; --wb-muted:#656b60; --wb-line:#d7dbd0;
  --wb-surface:#ffffff; --wb-acid:#d8f238; --wb-acid-soft:#eef7bd; --wb-acid-strong:#c5e934;
  --wb-shadow:4px 4px 0 var(--wb-ink);
  --wb-body:"Avenir Next",Avenir,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --wb-pixel:"Silkscreen",ui-monospace,SFMono-Regular,Menlo,monospace;
  --nav-h:60px; --sidebar-w:272px;
  --code-bg:#f6f6f7; --code-text:#3c3c43;
}
.dark{
  --wb-paper:#10120e; --wb-ink:#f3f5ed; --wb-muted:#aeb4a7; --wb-line:#343a2f;
  --wb-surface:#181b15; --wb-acid-soft:#2b3218; --wb-shadow:4px 4px 0 var(--wb-ink);
  --code-bg:#1b1b1f; --code-text:#dfdfd6;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--wb-paper);color:var(--wb-ink);font-family:var(--wb-body);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;transition:background .3s,color .3s}
a{color:inherit}
img{max-width:100%;height:auto;display:block}

/* ===== NAV ===== */
.nav{position:sticky;top:0;z-index:50;height:var(--nav-h);border-bottom:1px solid var(--wb-line);background:color-mix(in srgb,var(--wb-paper) 86%,transparent);backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px)}
.nav__inner{max-width:1480px;height:100%;margin:0 auto;padding:0 32px;display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;letter-spacing:-.03em;text-decoration:none}
.brand__logo{width:27px;height:27px;flex:0 0 auto;background:var(--wb-ink)}
.brand__logo svg{width:100%;height:100%}
.nav__menu{display:flex;align-items:center;gap:2px;margin-left:8px}
.nav__menu a{padding:8px 12px;font-size:15px;font-weight:600;text-decoration:none;border-radius:6px;transition:background .15s,color .15s}
.nav__menu a:hover{background:var(--wb-acid-soft)}
.nav__menu a.active{color:#355e18}
.dark .nav__menu a.active{color:var(--wb-acid)}
.nav__spacer{flex:1}
.nav__right{display:flex;align-items:center;gap:10px}
.group{position:relative}
.group__btn{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 12px;border:1px solid var(--wb-line);border-radius:8px;background:var(--wb-surface);color:var(--wb-ink);font-size:14px;font-weight:600;cursor:pointer;font-family:var(--wb-body)}
.group__btn .caret{width:14px;height:14px;transition:transform .2s}
.group:hover .group__btn .caret{transform:rotate(180deg)}
.group__panel{position:absolute;right:0;top:calc(100% + 10px);width:272px;background:var(--wb-surface);border:1px solid var(--wb-line);border-radius:10px;box-shadow:0 18px 50px rgba(0,0,0,.18);opacity:0;visibility:hidden;transform:translateY(-6px);transition:opacity .18s,transform .18s,visibility .18s;padding:4px}
.group:hover .group__panel{opacity:1;visibility:visible;transform:translateY(0)}
.qr{width:min(100%,272px);padding:8px 4px 12px;margin:0;color:var(--wb-ink)}
.qr__frame{position:relative;padding:8px;border:2px solid var(--wb-ink);border-radius:4px;background:#fff;box-shadow:4px 4px 0 var(--wb-acid)}
.qr__frame::before{content:"";position:absolute;top:3px;right:3px;bottom:3px;left:3px;border:1px solid rgba(18,20,15,.14);pointer-events:none}
.qr__frame img{width:100%;aspect-ratio:1}
.qr figcaption{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:13px;font-size:12px;font-weight:700;white-space:nowrap}
.qr figcaption span{color:var(--wb-muted);font-family:var(--wb-pixel);font-size:9px;font-weight:400;letter-spacing:.04em}
.switch{position:relative;width:40px;height:22px;flex:0 0 auto;border-radius:11px;border:1px solid var(--wb-line);background:var(--wb-acid-soft);cursor:pointer;padding:0}
.switch .check{position:absolute;top:2px;left:2px;width:16px;height:16px;border-radius:50%;background:var(--wb-ink);transition:transform .25s}
.dark .switch .check{transform:translateX(18px)}
.gh{width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--wb-line);border-radius:8px;background:var(--wb-surface);color:var(--wb-ink);text-decoration:none}
.gh:hover{border-color:var(--wb-ink)}
.burger{display:none;width:38px;height:38px;border:1px solid var(--wb-line);border-radius:8px;background:var(--wb-surface);cursor:pointer;align-items:center;justify-content:center;color:var(--wb-ink)}
.mobile-panel{display:none;flex-direction:column;gap:2px;padding:14px 20px 20px;border-bottom:1px solid var(--wb-line);background:var(--wb-paper)}
.mobile-panel.open{display:flex}
.mobile-panel a{padding:10px 8px;text-decoration:none;font-weight:600;border-radius:6px}

/* ===== LAYOUT ===== */
.layout{max-width:1480px;margin:0 auto;padding:0 32px}
.layout.has-sidebar{display:grid;grid-template-columns:var(--sidebar-w) 1fr;gap:0}
.sidebar{position:sticky;top:var(--nav-h);height:calc(100vh - var(--nav-h));overflow-y:auto;padding:24px 16px 48px 0;border-right:1px solid var(--wb-line);align-self:start}
.sidebar__home{display:block;font-weight:700;font-size:14px;padding:8px 12px;margin-bottom:8px;text-decoration:none;border-radius:6px;background:var(--wb-acid-soft)}
.sidebar__group{margin-bottom:6px}
.sidebar__part{display:block;font-weight:700;font-size:13px;padding:8px 12px 4px;color:var(--wb-ink);text-decoration:none;line-height:1.4}
.sidebar__part.is-active{color:#355e18}
.dark .sidebar__part.is-active{color:var(--wb-acid)}
.sidebar__item{display:block;font-size:13.5px;padding:6px 12px 6px 20px;color:var(--wb-muted);text-decoration:none;border-radius:6px;line-height:1.45;transition:color .15s,background .15s}
.sidebar__item:hover{color:var(--wb-ink);background:var(--wb-acid-soft)}
.sidebar__item.is-active{color:var(--wb-ink);font-weight:700;background:var(--wb-acid-soft)}
.sidebar-toggle{display:none;align-items:center;gap:6px;margin:12px 0;padding:8px 14px;border:1px solid var(--wb-line);border-radius:8px;background:var(--wb-surface);font-family:var(--wb-body);font-weight:600;cursor:pointer;color:var(--wb-ink)}
.content{padding:32px 0 64px;min-width:0}
.content.has-sidebar{padding:32px 0 64px 40px;max-width:880px}

/* ===== vp-doc content ===== */
.vp-doc{font-size:16px;line-height:1.8;color:var(--wb-ink)}
.vp-doc h1{font-size:34px;font-weight:820;letter-spacing:-.03em;line-height:1.2;margin:0 0 24px;padding-bottom:16px;border-bottom:1px solid var(--wb-line)}
.vp-doc h2{font-size:26px;font-weight:760;letter-spacing:-.02em;line-height:1.3;margin:40px 0 16px;padding-top:8px;border-top:1px solid var(--wb-line)}
.vp-doc h3{font-size:20px;font-weight:700;margin:28px 0 12px}
.vp-doc h4{font-size:17px;font-weight:700;margin:22px 0 10px}
.vp-doc p{margin:0 0 16px}
.vp-doc a{color:#355e18;text-decoration:underline;text-decoration-color:var(--wb-acid-strong);text-underline-offset:3px}
.dark .vp-doc a{color:var(--wb-acid)}
.vp-doc a:hover{text-decoration-color:currentColor}
.vp-doc ul,.vp-doc ol{margin:0 0 16px;padding-left:24px}
.vp-doc li{margin:4px 0}
.vp-doc blockquote{margin:16px 0;padding:8px 16px;border-left:3px solid var(--wb-acid-strong);background:var(--wb-acid-soft);border-radius:0 6px 6px 0;color:var(--wb-ink)}
.vp-doc blockquote p{margin:6px 0}
.vp-doc img{margin:16px auto;border:1px solid var(--wb-line);border-radius:8px;max-width:100%;box-shadow:0 6px 20px rgba(0,0,0,.06)}
.vp-doc hr{border:0;border-top:1px solid var(--wb-line);margin:32px 0}
.vp-doc table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
.vp-doc th,.vp-doc td{border:1px solid var(--wb-line);padding:8px 12px;text-align:left}
.vp-doc th{background:var(--wb-acid-soft);font-weight:700}
.vp-doc code{font-family:var(--wb-pixel),ui-monospace,monospace;font-size:.88em;background:var(--code-bg);color:var(--code-text);padding:2px 6px;border-radius:4px}
.vp-doc pre{margin:16px 0;padding:16px 18px;background:var(--code-bg);border:1px solid var(--wb-line);border-radius:8px;overflow-x:auto;font-size:13.5px;line-height:1.6}
.vp-doc pre code{background:none;padding:0;font-size:inherit;color:inherit}
.vp-doc .shiki{background:var(--code-bg)!important}
.vp-doc .custom-block{margin:16px 0;padding:16px 18px;border-radius:8px;border-left:4px solid var(--wb-line);background:var(--wb-surface);border:1px solid var(--wb-line)}
.vp-doc .custom-block .custom-block-title{font-weight:700;margin-bottom:6px}
.vp-doc .warning.custom-block{border-left-color:#946300;background:#fffbeb}
.dark .vp-doc .warning.custom-block{background:#1a1606}
.vp-doc .tip.custom-block{border-left-color:#299764}
.vp-doc .info.custom-block{border-left-color:#3a5ccc}
.vp-doc .danger.custom-block{border-left-color:#d5393e}
.vp-doc .wb-mermaid{margin:20px 0;text-align:center}
.vp-doc .wb-mermaid svg{max-width:100%}
.vp-doc .mermaid{margin:20px 0;text-align:center}

/* ===== prev-next ===== */
.prev-next{display:flex;gap:16px;margin-top:48px;padding-top:24px;border-top:1px solid var(--wb-line)}
.prev-next .prev,.prev-next .next{flex:1;display:flex;flex-direction:column;gap:4px;padding:14px 16px;border:1px solid var(--wb-line);border-radius:8px;text-decoration:none;background:var(--wb-surface);transition:border-color .15s,box-shadow .15s,transform .15s}
.prev-next .next{align-items:flex-end;text-align:right}
.prev-next a:hover{border-color:var(--wb-ink);box-shadow:var(--wb-shadow);transform:translate(-2px,-2px)}
.prev-next .placeholder{visibility:hidden}
.prev-next .pn-label{display:flex;align-items:center;gap:6px;font-family:var(--wb-pixel);font-size:11px;color:var(--wb-muted)}
.prev-next .pn-title{font-weight:700;font-size:14px}

/* ===== footer ===== */
.footer{border-top:1px solid var(--wb-line);margin-top:48px;padding:28px 32px;display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;color:var(--wb-muted);font-size:13px}
.footer__links{display:flex;gap:18px;flex-wrap:wrap}
.footer a{color:var(--wb-muted);text-decoration:none}
.footer a:hover{color:var(--wb-ink)}

/* ===== responsive ===== */
@media (max-width:960px){
  .nav__menu,.group{display:none}
  .burger{display:inline-flex}
  .layout{padding:0 20px}
  .layout.has-sidebar{grid-template-columns:1fr}
  .sidebar{display:none;position:fixed;top:var(--nav-h);left:0;right:0;bottom:0;height:auto;z-index:40;background:var(--wb-paper);border-right:none;border-bottom:1px solid var(--wb-line);padding:16px 20px}
  .sidebar.open{display:block}
  .sidebar-toggle{display:inline-flex}
  .content.has-sidebar{padding:24px 0 48px}
}
@media (max-width:640px){
  .nav__inner{padding:0 16px;gap:10px}
  .layout{padding:0 14px}
  .vp-doc h1{font-size:26px}
  .vp-doc h2{font-size:21px}
  .prev-next{flex-direction:column}
  .prev-next .next{align-items:flex-start;text-align:left}
  .footer{padding:20px 16px}
}