:root {
  --blue: #0a6cff;
  --ink: #1a1a1f;
  --muted: #6b7280;
  --bg: #f5f6f8;
  --card: #ffffff;
  --line: #e6e8ec;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.hero {
  background: linear-gradient(135deg, #0a6cff 0%, #00a0fa 100%);
  color: #fff;
  padding: 56px 20px 48px;
  text-align: center;
}
.hero img {
  width: 96px; height: 96px;
  border-radius: 22px;
  box-shadow: 0 8px 24px rgba(0,0,0,.18);
}
.hero h1 { font-size: 28px; margin: 18px 0 6px; font-weight: 700; }
.hero p { margin: 0; opacity: .92; font-size: 16px; }

.wrap { max-width: 760px; margin: 0 auto; padding: 32px 20px 64px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px 22px;
  margin: 18px 0;
}
h2 { font-size: 20px; margin: 32px 0 10px; }
h3 { font-size: 16px; margin: 22px 0 6px; color: var(--ink); }
.muted { color: var(--muted); font-size: 14px; }
ul { padding-left: 20px; margin: 8px 0; }
li { margin: 4px 0; }

.features { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px; }
.feature h3 { margin: 0 0 4px; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; }

.btn {
  display: inline-block;
  background: var(--blue); color: #fff;
  padding: 12px 26px; border-radius: 999px;
  font-weight: 600; margin-top: 14px;
}
.btn:hover { text-decoration: none; opacity: .92; }

.nav { text-align: center; padding: 8px 20px 0; }
.nav a { margin: 0 10px; font-size: 14px; }

footer {
  text-align: center; color: var(--muted);
  font-size: 13px; padding: 28px 20px 48px;
  border-top: 1px solid var(--line); background: var(--card);
}
.lang-divider { border: none; border-top: 1px solid var(--line); margin: 40px 0; }