:root{--nextra-primary-hue:220;--nextra-primary-saturation:100%;--manual-bg:#f9f9f9;--manual-sidebar-bg:#f9f9f9;--manual-content-bg:#fff;--manual-border:#e0e3e8;--manual-text:#222;--manual-link:#2563eb;--manual-link-hover:#174ea6;--manual-heading:#1a237e;--banner-bg:#E6F3FF;--banner-text:#4A90E2;--navbar-bg:#f9f9f9;--search-bg:#E6F3FF;--search-color:#222;--search-link:#2563eb;--search-mark:#FF9966}html body{background-color:var(--manual-bg);color:var(--manual-text);font-family:Inter,Helvetica Neue,Arial,sans-serif;font-size:16px;line-height:1.7;margin:0;padding:0}.nextra-container{background-color:var(--manual-content-bg);border-radius:12px;box-shadow:0 2px 8px rgba(60,72,88,.04);margin:32px auto;padding:32px 40px;max-width:900px;min-height:70vh}.nextra-sidebar-container{background-color:var(--manual-sidebar-bg);border-right:1px solid var(--manual-border);padding:32px 0;min-width:220px}.nextra-sidebar-container nav,.nextra-sidebar-container ul{margin:0;padding:0 0 0 24px}.nextra-sidebar-container a{color:var(--manual-link);font-weight:500;font-size:16px;padding:6px 0;display:block;border-radius:4px;transition:background .2s,color .2s}.nextra-sidebar-container a.active,.nextra-sidebar-container a:hover{background:#e3e8f0;color:var(--manual-link-hover)}.nextra-content{padding:0 24px}.nextra-toc{background:var(--manual-sidebar-bg);border-left:1px solid var(--manual-border);padding:24px 16px;min-width:180px}.nextra-banner{background-color:var(--banner-bg);color:var(--banner-text)}.nextra-search input{padding:0 8px}.nextra-search-results{background-color:var(--search-bg);color:var(--search-color)}.nextra-search-results a{color:var(--search-link)}.nextra-search-results mark{color:var(--search-mark)}.nextra-navbar nav{background-color:var(--navbar-bg);border-bottom:1px solid var(--manual-border)}.nextra-mobile-nav{background-color:var(--search-bg)}h1,h2,h3,h4,h5,h6{color:var(--manual-heading);font-family:Inter,Helvetica Neue,Arial,sans-serif;margin-top:2.2em;margin-bottom:.7em;font-weight:700}h1{font-size:2.2rem}h2{font-size:1.6rem}h3{font-size:1.25rem}ol,p,ul{margin-top:.7em;margin-bottom:.7em}ol,ul{padding-left:1.5em}li{margin-bottom:.3em}a{color:var(--manual-link);text-decoration:underline;transition:color .2s}a:hover{color:var(--manual-link-hover)}.breadcrumb{font-size:.97em;color:#6b7280;margin-bottom:1.5em}footer{color:#7b809a;font-size:.95em;margin-top:3em;text-align:center;border-top:1px solid var(--manual-border);padding-top:1.5em;background:none}.nextra-banner-container{background:#e3e8f0;color:#1a237e;font-weight:600;border-radius:8px;margin-bottom:2em;padding:.7em 1.2em}@media (max-width:900px){.nextra-container{padding:18px 8px;margin:16px 0}.nextra-sidebar-container,.nextra-toc{min-width:120px;padding:12px 0}}@media (min-width:1280px){.nextra-navbar nav{padding-right:calc(var(--x-spacing) * 64);margin-right:40px}}.wechatapp h1,.wechatapp h2,.wechatapp h3,.wechatapp h4,.wechatapp h5,.wechatapp h6{margin-top:1em}.wechatapp img{max-width:100%;width:350px;height:auto;margin:20px 0;border-radius:12px;border:1px solid #e0e3e8}