* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  color: #1f2937;
  line-height: 1.6;
}
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 60px 24px;
}
.hero {
  text-align: center;
  color: #fff;
  margin-bottom: 48px;
}
.logo { font-size: 64px; margin-bottom: 8px; }
.hero h1 {
  font-size: 56px;
  margin: 0 0 8px;
  font-weight: 700;
  letter-spacing: 4px;
  text-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.subtitle {
  font-size: 20px;
  margin: 0 0 16px;
  opacity: 0.95;
}
.tagline {
  font-size: 14px;
  margin: 0;
  opacity: 0.8;
  letter-spacing: 2px;
}
section {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 28px 32px;
  margin-bottom: 20px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}
section h2 {
  margin: 0 0 12px;
  font-size: 18px;
  color: #4338ca;
}
section p { margin: 8px 0; color: #4b5563; }
code {
  background: #f1f5f9;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 13px;
  color: #6366f1;
  font-family: "SF Mono", Monaco, Consolas, monospace;
}
ul { margin: 8px 0; padding-left: 20px; color: #4b5563; }
li { margin: 4px 0; }
.links {
  display: flex;
  gap: 12px;
  justify-content: center;
  background: none;
  box-shadow: none;
  padding: 0;
}
.btn {
  display: inline-block;
  padding: 12px 24px;
  background: #6366f1;
  color: #fff;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 500;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}
.env-card { background: rgba(255, 255, 255, 0.95); }
.env-card p { margin: 6px 0; }
@media (max-width: 640px) {
  .container { padding: 32px 16px; }
  .hero h1 { font-size: 40px; }
  .subtitle { font-size: 16px; }
  section { padding: 20px; }
}