:root {
  --bg: #f5f5f7; --panel: #ffffff; --ink: #1d1d1f; --muted: #6e6e73; --line: #e5e5ea;
  --accent: #0071e3; --red: #ff3b30;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #000000; --panel: #1c1c1e; --ink: #f5f5f7; --muted: #a1a1a6; --line: #2c2c2e; --accent: #2997ff; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.5 -apple-system, "SF Pro Text", "Segoe UI Variable Text", "Segoe UI", system-ui, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 980px; margin: 0 auto; padding: 0 22px; }
header { position: sticky; top: 0; z-index: 2; backdrop-filter: saturate(180%) blur(20px); background: color-mix(in srgb, var(--bg) 78%, transparent); border-bottom: 1px solid var(--line); }
header .wrap { display: flex; align-items: center; gap: 10px; height: 52px; }
header img { width: 26px; height: 26px; }
header .name { font-weight: 600; font-size: 19px; letter-spacing: -.01em; color: var(--ink); }
header nav { margin-left: auto; display: flex; gap: 22px; font-size: 14px; }
header nav a { color: var(--muted); }
.mark-dark { display: none; }
@media (prefers-color-scheme: dark) { .mark-light { display: none; } .mark-dark { display: inline; } }

h1, h2, h3 { font-family: -apple-system, "SF Pro Display", "Segoe UI Variable Display", "Segoe UI", system-ui, sans-serif; letter-spacing: -.02em; }
.hero { text-align: center; padding: 88px 0 56px; }
.hero .icon { width: 112px; height: 112px; border-radius: 26px; background: #f4f1ea; display: inline-grid; place-items: center; box-shadow: 0 12px 40px rgba(0,0,0,.12); }
.hero .icon img { width: 76px; height: 76px; }
.hero h1 { font-size: clamp(40px, 7vw, 72px); line-height: 1.05; margin: 28px 0 14px; font-weight: 700; }
.hero p.lead { font-size: clamp(19px, 2.4vw, 24px); color: var(--muted); max-width: 680px; margin: 0 auto; }
.cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 34px; }
.btn { display: inline-block; padding: 13px 26px; border-radius: 980px; font-size: 17px; font-weight: 500; }
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { text-decoration: none; filter: brightness(1.08); }
.btn.ghost { color: var(--accent); }
.small { font-size: 13px; color: var(--muted); margin-top: 14px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 18px; padding: 24px 0 70px; }
.card { background: var(--panel); border-radius: 20px; padding: 28px 28px 26px; border: 1px solid var(--line); }
.card .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--red); margin-bottom: 14px; }
.card h3 { margin: 0 0 6px; font-size: 21px; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }

.band { background: var(--panel); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 64px 0; text-align: center; }
.band h2 { font-size: clamp(30px, 4.5vw, 44px); margin: 0 0 10px; }
.band p { color: var(--muted); max-width: 640px; margin: 0 auto; font-size: 19px; }

article { max-width: 720px; margin: 0 auto; padding: 56px 22px 80px; }
article h1 { font-size: 44px; margin: 0 0 6px; }
article h2 { font-size: 24px; margin: 38px 0 8px; }
article p, article li { color: var(--ink); }
article .muted { color: var(--muted); }

footer { border-top: 1px solid var(--line); padding: 28px 0 40px; font-size: 13px; color: var(--muted); }
footer .wrap { display: flex; gap: 18px; flex-wrap: wrap; }
footer .right { margin-left: auto; }
@media (max-width: 560px) { header nav { gap: 14px; } footer .right { margin-left: 0; } }