:root{color-scheme:light;--color-bg: #f8f9fb;--color-surface: #ffffff;--color-border: #d8dee9;--color-text: #1a2332;--color-muted: #5c6b7f;--color-accent: #1d4ed8;--color-accent-soft: #eff6ff;--font-sans: "Segoe UI", system-ui, -apple-system, sans-serif;--font-mono: ui-monospace, "Cascadia Code", monospace;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);--radius: 10px;--header-height: 3.5rem;--sidebar-width: 15rem}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font-sans);font-size:1rem;line-height:1.6;color:var(--color-text);background:var(--color-bg)}a{color:var(--color-accent)}a:hover{text-decoration:underline}.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:var(--header-height);padding:0 1.5rem;background:var(--color-surface);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-sm)}.site-brand{font-weight:700;font-size:1.05rem;color:var(--color-text);text-decoration:none}.site-brand:hover{text-decoration:none;color:var(--color-accent)}.site-header nav a{margin-left:1rem;color:var(--color-muted);text-decoration:none;font-size:.95rem}.site-header nav a:hover{color:var(--color-accent)}.site-main{max-width:72rem;margin:0 auto;padding:2rem 1.5rem 4rem}.site-footer{max-width:72rem;margin:0 auto;padding:1.5rem;color:var(--color-muted);font-size:.875rem;border-top:1px solid var(--color-border)}.hero{margin-bottom:2.5rem}.hero h1{margin:0 0 .75rem;font-size:clamp(1.75rem,4vw,2.25rem);line-height:1.2}.hero p{margin:0;max-width:42rem;color:var(--color-muted);font-size:1.05rem}.section-heading{margin:2rem 0 1rem;font-size:1.25rem}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(16rem,1fr));gap:1rem}.card{display:flex;flex-direction:column;gap:.5rem;padding:1.25rem;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);box-shadow:var(--shadow-sm);text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s}.card:hover{border-color:var(--color-accent);box-shadow:0 4px 12px #1d4ed814;text-decoration:none}.card h3{margin:0;font-size:1.05rem}.card p{margin:0;color:var(--color-muted);font-size:.925rem}.guide-shell{display:grid;grid-template-columns:var(--sidebar-width) minmax(0,1fr);gap:2rem;align-items:start}.guide-breadcrumb{grid-column:1 / -1;margin:0 0 .5rem;font-size:.875rem;color:var(--color-muted)}.guide-breadcrumb a{color:var(--color-muted)}.guide-header{grid-column:1 / -1;margin-bottom:.5rem}.guide-header h1{margin:0 0 .5rem;font-size:clamp(1.5rem,3vw,2rem)}.guide-header p{margin:0 0 .75rem;color:var(--color-muted)}.guide-product-link{display:inline-block;font-size:.925rem}.guide-sidebar{position:sticky;top:calc(var(--header-height) + 1rem);padding:1rem;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius)}.guide-sidebar h2{margin:0 0 .75rem;font-size:.75rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--color-muted)}.guide-sidebar ul{list-style:none;margin:0;padding:0}.guide-sidebar li+li{margin-top:.25rem}.guide-sidebar a{display:block;padding:.35rem .5rem;border-radius:6px;color:var(--color-muted);text-decoration:none;font-size:.925rem}.guide-sidebar a:hover{color:var(--color-accent);background:var(--color-accent-soft);text-decoration:none}.guide-sidebar a.is-active{color:var(--color-accent);background:var(--color-accent-soft);font-weight:600}.guide-content{min-width:0;padding:1.5rem;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius)}.guide-content h2{margin:2rem 0 .75rem;padding-top:.5rem;font-size:1.35rem;scroll-margin-top:calc(var(--header-height) + 1rem)}.guide-content h2:first-child{margin-top:0}.guide-content p,.guide-content ul{margin:0 0 1rem}.guide-content ul{padding-left:1.25rem}.notice{padding:.875rem 1rem;margin-bottom:1.5rem;background:var(--color-accent-soft);border:1px solid #bfdbfe;border-radius:var(--radius);color:#1e3a8a;font-size:.95rem}@media(max-width:768px){.guide-shell{grid-template-columns:1fr}.guide-sidebar{position:static}.guide-sidebar ul{display:flex;flex-wrap:wrap;gap:.35rem}.guide-sidebar li+li{margin-top:0}}