:root{
  --bg:#f8fafc;
  --card:#ffffff;
  --text:#101828;
  --muted:#667085;
  --line:#e5e7eb;
  --accent:#10b981;
  --accent-dark:#047857;
  --blue:#2563eb;
  --warning:#fff7ed;
  --warning-line:#fdba74;
  --shadow:0 14px 34px rgba(15,23,42,.08);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:linear-gradient(180deg,#f8fafc 0%,#eef2f7 100%);line-height:1.55}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
.site-header{background:linear-gradient(135deg,#0f172a,#1e293b);color:white;padding:24px 20px}
.header-inner{max-width:1120px;margin:0 auto;display:flex;align-items:center;gap:18px}
.logo{width:62px;height:62px;border-radius:16px;object-fit:cover;background:#0b1220;box-shadow:0 12px 25px rgba(0,0,0,.22)}
.brand h1{margin:0;font-size:2.15rem;letter-spacing:-.04em;line-height:1}
.brand p{margin:7px 0 0;color:#d1d5db}
.nav{background:rgba(255,255,255,.92);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10;backdrop-filter:blur(10px)}
.nav-inner{max-width:1120px;margin:0 auto;padding:11px 20px;display:flex;gap:10px;flex-wrap:wrap}
.nav a{color:#111827;font-weight:700;padding:8px 11px;border-radius:999px}
.nav a:hover{background:#f1f5f9;text-decoration:none}
main{max-width:1120px;margin:0 auto;padding:36px 20px 64px}
.hero{display:grid;grid-template-columns:1.45fr 1fr;gap:24px;align-items:stretch}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);margin-bottom:18px}
.hero h2{margin-top:0;font-size:clamp(2rem,4vw,3.15rem);line-height:1.05;letter-spacing:-.055em}
.kicker{color:var(--accent-dark);font-weight:800;text-transform:uppercase;letter-spacing:.075em;font-size:.84rem}
.button-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
.button{display:inline-block;padding:12px 17px;border-radius:14px;background:var(--accent);color:white;font-weight:800;box-shadow:0 10px 20px rgba(16,185,129,.22)}
.button:hover{text-decoration:none;filter:brightness(.97)}
.button.secondary{background:#e0f2fe;color:#0c4a6e;box-shadow:none}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}
.grid.two{grid-template-columns:repeat(2,1fr)}
h2,h3{letter-spacing:-.025em}
h2{margin-top:34px}
ul{padding-left:1.2rem}
.notice{background:var(--warning);border:1px solid var(--warning-line);border-radius:16px;padding:16px}
.footer{border-top:1px solid var(--line);background:#fff;padding:26px 20px;color:var(--muted)}
.footer-inner{max-width:1120px;margin:0 auto}
code{background:#f3f4f6;padding:2px 5px;border-radius:6px}
pre{overflow:auto;background:#111827;color:#e5e7eb;border-radius:14px;padding:16px}
pre code{background:transparent;color:inherit;padding:0}
.tutorial{display:flex;flex-direction:column;gap:18px}
.tutorial-step{display:grid;grid-template-columns:52px 1fr;gap:18px;align-items:start}
.step-number{width:42px;height:42px;border-radius:14px;background:var(--accent);color:#fff;font-weight:900;display:flex;align-items:center;justify-content:center;font-size:1.2rem}
.screenshot-placeholder{margin-top:14px;border:2px dashed #cbd5e1;border-radius:16px;background:#f8fafc;color:#64748b;padding:22px;text-align:center;font-weight:700}
.screenshot-preview{margin-top:30px}
.screenshot-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:18px}
.screenshot-card{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:var(--shadow);transition:transform .16s ease,box-shadow .16s ease}
.screenshot-card:hover{transform:translateY(-2px);box-shadow:0 18px 40px rgba(15,23,42,.12)}
.screenshot-card img{width:100%;display:block;background:#e5e7eb}
.screenshot-card .caption{padding:17px}
.screenshot-card h3{margin:0 0 8px}
.screenshot-card p{margin:0;color:var(--muted)}
.screenshot-note{font-size:.95rem;color:var(--muted);margin-top:10px}
.help-image{margin-top:14px;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:#f8fafc;box-shadow:0 10px 25px rgba(15,23,42,.06)}
.help-image img{width:100%;display:block}
.help-image figcaption{padding:10px 14px;color:var(--muted);font-size:.95rem;background:#fff}
.help-warning{background:#fff7ed;border:1px solid #fdba74;border-radius:16px;padding:16px;margin-top:18px}
.check-list li{margin-bottom:6px}
.feature-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:18px}
.feature-pill{background:#ecfdf5;border:1px solid #bbf7d0;color:#065f46;border-radius:16px;padding:13px 14px;font-weight:800;text-align:center}
@media(max-width:920px){
  .hero,.grid,.grid.two{grid-template-columns:1fr}
  .screenshot-grid{grid-template-columns:repeat(2,1fr)}
  .feature-strip{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:620px){
  .site-header{padding:18px 16px}
  .header-inner{align-items:flex-start}
  .logo{width:52px;height:52px;border-radius:14px}
  .brand h1{font-size:1.65rem}
  .brand p{font-size:.95rem}
  main{padding:24px 14px 50px}
  .card{padding:20px;border-radius:20px}
  .nav-inner{padding:9px 12px;gap:6px}
  .nav a{font-size:.95rem;padding:7px 9px}
  .screenshot-grid{grid-template-columns:1fr}
  .tutorial-step{grid-template-columns:1fr}
  .step-number{margin-bottom:6px}
}