:root {
  --green: #10a37f;
  --green-dark: #0d8a6c;
  --ink: #1a1a1a;
  --muted: #666;
  --bg: #fafaf8;
  --card: #ffffff;
  --border: #e6e6e2;
}
* { box-sizing: border-box; }
body {
  margin: 0; color: var(--ink); background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Microsoft YaHei", "Noto Sans", sans-serif;
  line-height: 1.65;
}
a { color: var(--green); }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }

header {
  background: var(--card); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.nav { display: flex; align-items: center; gap: 14px; padding: 14px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: var(--ink); text-decoration: none; flex: 1; }
.brand svg { color: var(--green); }
.nav a.link { color: var(--muted); text-decoration: none; font-size: 14px; }
.nav a.link:hover { color: var(--green); }
select#lang {
  padding: 6px 10px; border: 1px solid var(--border); border-radius: 8px;
  background: #fff; font-size: 13px; cursor: pointer; color: var(--ink);
}

.hero { text-align: center; padding: 72px 0 48px; }
.hero h1 { font-size: 40px; margin: 0 0 16px; letter-spacing: -0.5px; }
.hero h1 .accent { color: var(--green); }
.hero p.sub { font-size: 18px; color: var(--muted); max-width: 640px; margin: 0 auto 32px; }
.cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px;
  border-radius: 10px; font-size: 15px; font-weight: 600; text-decoration: none;
  border: 1px solid transparent; transition: background .15s;
}
.btn.primary { background: var(--green); color: #fff; }
.btn.primary:hover { background: var(--green-dark); }
.btn.ghost { background: #fff; color: var(--ink); border-color: var(--border); }
.btn.ghost:hover { border-color: var(--green); color: var(--green); }
.note { font-size: 12.5px; color: #999; margin-top: 12px; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; padding: 24px 0 56px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 22px;
}
.card .ic { color: var(--green); margin-bottom: 10px; }
.card h3 { margin: 0 0 8px; font-size: 16px; }
.card p { margin: 0; font-size: 14px; color: var(--muted); }

.section { padding: 8px 0 56px; }
.section h2 { font-size: 24px; margin: 0 0 16px; }
.section ol { padding-left: 22px; color: var(--muted); }
.section ol li { margin-bottom: 8px; }

/* privacy page */
.doc { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 34px 38px; margin: 40px 0 56px; }
.doc h1 { font-size: 28px; margin-top: 0; }
.doc h2 { font-size: 18px; margin-top: 28px; }
.doc p, .doc li { color: #444; font-size: 15px; }
.doc .updated { color: #999; font-size: 13px; }

footer { border-top: 1px solid var(--border); padding: 26px 0 40px; color: #999; font-size: 13px; }
footer .wrap { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
footer a { color: #888; text-decoration: none; }
footer a:hover { color: var(--green); }
footer .spacer { flex: 1; }