:root{
  --bg:#f6f7fb; --panel:#ffffff; --ink:#0f172a; --muted:#64748b; --line:#e5e7eb;
  --accent:#4f46e5; --accent2:#6366f1; --accent-soft:#eef2ff;
  --sidebar:#0f172a; --sidebar2:#111c34; --sidebar-ink:#cbd5e1;
  --ok:#16a34a; --warn:#b45309; --danger:#b91c1c; --radius:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Arial,sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
code{background:#f1f5f9;border:1px solid #e2e8f0;border-radius:6px;padding:1px 6px;font-size:.88em}
pre{background:#0f172a;color:#e2e8f0;padding:14px 16px;border-radius:12px;overflow:auto;font-size:.85rem}
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:18px;padding:12px 22px;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-size:1.05rem;white-space:nowrap}
.brand:hover{text-decoration:none}
.brand-mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--accent),#8b5cf6);color:#fff;display:grid;place-items:center;font-weight:800;font-size:.85rem;letter-spacing:.02em}
.search-box{position:relative;flex:1;max-width:560px;margin-left:auto}
#searchInput{width:100%;padding:10px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;font-size:.92rem;outline:none}
#searchInput:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.search-results{position:absolute;top:calc(100% + 8px);left:0;right:0;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 18px 50px rgba(15,23,42,.16);overflow:hidden;display:none;max-height:420px;overflow:auto}
.search-results.open{display:block}
.sr-item{display:block;padding:10px 14px;border-bottom:1px solid #f1f5f9;color:var(--ink)}
.sr-item:last-child{border-bottom:0}
.sr-item:hover{background:#f8faff;text-decoration:none}
.sr-item b{display:block;font-size:.9rem}
.sr-item span{display:block;color:var(--muted);font-size:.78rem;margin-top:2px}
.demo-link{white-space:nowrap;font-size:.82rem;font-weight:600;background:var(--accent-soft);color:var(--accent);padding:8px 12px;border-radius:10px}
.demo-link:hover{text-decoration:none;background:#e0e7ff}
.layout{display:flex;min-height:calc(100vh - 61px)}
.sidebar{width:280px;flex:0 0 280px;background:linear-gradient(180deg,var(--sidebar),var(--sidebar2));color:var(--sidebar-ink);padding:18px 14px 40px;position:sticky;top:61px;height:calc(100vh - 61px);overflow:auto}
.nav-section{margin-bottom:18px}
.nav-title{font-size:.7rem;text-transform:uppercase;letter-spacing:.12em;color:#7c8aa5;padding:0 10px 6px;font-weight:700}
.nav-link{display:block;padding:7px 10px;border-radius:9px;color:var(--sidebar-ink);font-size:.88rem;margin:1px 0}
.nav-link:hover{background:rgba(255,255,255,.07);color:#fff;text-decoration:none}
.nav-link.active{background:linear-gradient(90deg,rgba(99,102,241,.28),rgba(99,102,241,.08));color:#fff;box-shadow:inset 3px 0 0 var(--accent2)}
.content{flex:1;min-width:0;max-width:1080px;padding:30px 44px 70px;margin:0 auto}
.breadcrumb{color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;font-weight:700;margin-bottom:6px}
h1{font-size:2rem;line-height:1.2;margin:0 0 14px;letter-spacing:-.02em}
h2{font-size:1.25rem;margin:32px 0 10px;letter-spacing:-.01em;padding-top:6px}
h3{font-size:1.02rem;margin:22px 0 8px}
p{margin:10px 0}
.lead{font-size:1.06rem;color:#334155;margin-bottom:20px}
ul,ol{margin:10px 0 14px;padding-left:24px}
li{margin:5px 0}
.hero-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin:22px 0 10px}
.hero-card{display:flex;flex-direction:column;gap:4px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;color:var(--ink);box-shadow:0 2px 10px rgba(15,23,42,.04);transition:.15s}
.hero-card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 10px 26px rgba(15,23,42,.10);border-color:#c7d2fe}
.hc-icon{width:34px;height:34px;border-radius:10px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-weight:800;margin-bottom:4px}
.hero-card b{font-size:.98rem}
.hero-card span:last-child{color:var(--muted);font-size:.83rem}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px;margin:14px 0;background:#fff}
table{border-collapse:collapse;width:100%;font-size:.88rem}
th{background:#f8fafc;color:var(--muted);text-align:left;font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;padding:11px 13px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:10px 13px;border-bottom:1px solid #f1f5f9;vertical-align:top}
tr:last-child td{border-bottom:0}
tr:hover td{background:#fbfcff}
figure{margin:20px 0;background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 3px 14px rgba(15,23,42,.05)}
figure img{display:block;width:100%;height:auto;background:#f8fafc}
figcaption{padding:9px 14px;color:var(--muted);font-size:.8rem;border-top:1px solid #f1f5f9}
.note,.tip,.warn{padding:13px 15px;border-radius:12px;margin:16px 0;font-size:.9rem;border:1px solid}
.note{background:#eff6ff;border-color:#bfdbfe;color:#1e3a8a}
.tip{background:#f0fdf4;border-color:#bbf7d0;color:#14532d}
.warn{background:#fff7ed;border-color:#fed7aa;color:#7c2d12}
.steps{padding-left:22px}
.steps li{margin:7px 0}
.page-nav{display:flex;justify-content:space-between;gap:14px;margin-top:44px;padding-top:18px;border-top:1px solid var(--line)}
.page-nav a{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 14px;font-size:.86rem;font-weight:600;max-width:48%}
.page-nav a:hover{text-decoration:none;border-color:#c7d2fe;background:#f8faff}
.page-nav .next{margin-left:auto;text-align:right}
.footer{margin-top:34px;color:#94a3b8;font-size:.75rem}
.menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 10px;font-size:1rem}
@media(max-width:980px){
  .sidebar{position:fixed;left:0;top:61px;z-index:25;transform:translateX(-100%);transition:.2s}
  .sidebar.open{transform:none;box-shadow:20px 0 50px rgba(15,23,42,.25)}
  .content{padding:22px 18px 60px}
  .menu-toggle{display:block}
  .demo-link{display:none}
}
@media(max-width:640px){
  h1{font-size:1.55rem}
  .topbar{padding:10px 12px;gap:10px}
  .brand span:last-child{font-size:.92rem}
  .search-box{max-width:none}
  .page-nav{flex-direction:column}
  .page-nav a{max-width:none}
}
@media print{
  .topbar,.sidebar,.page-nav,.menu-toggle{display:none!important}
  .content{max-width:none;padding:0}
  body{background:#fff}
  figure{break-inside:avoid}
}