:root {
  --bg: #F8F9FC;
  --card: #FFFFFF;
  --text-main: #1D1D1F;
  --text-muted: #6E6E73;
  --primary: #5E5CE6;
  --accent: #FF6B8B;
  --border: rgba(0,0,0,0.08);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text-main);
  line-height: 1.6;
  padding: 32px 16px;
}
.container {
  max-width: 680px;
  margin: 0 auto;
  background: var(--card);
  padding: 40px 32px;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.04);
  border: 1px solid var(--border);
}
header { margin-bottom: 28px; text-align: center; }
.logo { font-size: 34px; font-weight: 800; letter-spacing: -0.5px; color: var(--text-main); margin-bottom: 6px; }
.tagline { font-size: 15px; color: var(--text-muted); }
nav { margin-top: 16px; display: flex; justify-content: center; gap: 18px; font-size: 14px; font-weight: 600; }
nav a { color: var(--primary); text-decoration: none; }
nav a:hover { text-decoration: underline; }
h1 { font-size: 24px; font-weight: 700; margin-bottom: 12px; color: var(--text-main); }
h2 { font-size: 18px; font-weight: 600; margin-top: 24px; margin-bottom: 8px; color: var(--text-main); }
p, li { font-size: 15px; color: #3A3A3C; margin-bottom: 12px; }
ul { padding-left: 20px; margin-bottom: 16px; }
.card { background: #F2F4F8; padding: 18px; border-radius: 14px; margin: 18px 0; border: 1px solid var(--border); }
.badge { display: inline-block; background: #E5E9FF; color: var(--primary); font-size: 12px; font-weight: 700; padding: 3px 8px; border-radius: 6px; margin-bottom: 8px; }
footer { margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--border); text-align: center; font-size: 13px; color: var(--text-muted); }