:root { --accent: #2563eb; --ink: #1f2328; --muted: #5b6470; --line: #e6e8eb; --bg: #ffffff; }
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; color: var(--ink); line-height: 1.6; background: var(--bg); }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 24px; }
header { border-bottom: 1px solid var(--line); }
header .wrap { display: flex; align-items: center; justify-content: space-between; padding: 18px 24px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--ink); text-decoration: none; }
.brand .dot { width: 18px; height: 18px; border-radius: 4px; background: var(--accent); display: inline-block; }
nav a { color: var(--muted); text-decoration: none; margin-left: 20px; font-size: 15px; }
nav a:hover { color: var(--accent); }
.hero { padding: 72px 0 56px; }
.hero h1 { font-size: 38px; line-height: 1.2; margin: 0 0 14px; }
.hero p { font-size: 18px; color: var(--muted); margin: 0 0 28px; max-width: 600px; }
.btn { display: inline-block; background: var(--accent); color: #fff; text-decoration: none; padding: 11px 22px; border-radius: 6px; font-weight: 600; }
section.body { padding: 8px 0 56px; }
section.body h2 { font-size: 24px; margin: 32px 0 10px; }
section.body p { color: #333; max-width: 680px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 28px; }
.card { border: 1px solid var(--line); border-radius: 8px; padding: 20px; }
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { font-size: 14px; color: var(--muted); margin: 0; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; padding: 24px; }
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--accent); }
.center { text-align: center; padding: 80px 0; }
.center h1 { font-size: 64px; margin: 0; color: var(--accent); }