* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: #f5f5f7;
  color: #1d1d1f;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

header.page-header {
  background: #ffffff;
  border-bottom: 1px solid #e5e5ea;
  padding: 1.25rem 1.5rem;
  text-align: center;
}

header.page-header .brand {
  font-size: 1.05rem;
  font-weight: 600;
  color: #1d1d1f;
  text-decoration: none;
  letter-spacing: 0.02em;
}

h1 {
  font-size: 1.9rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: #6e6e73;
  margin-bottom: 2rem;
  font-size: 1.05rem;
}

h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  color: #1d1d1f;
}

h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 1.25rem 0 0.5rem;
}

p { margin-bottom: 0.9rem; color: #3a3a3c; }

ul, ol { margin: 0 0 0.9rem 1.4rem; color: #3a3a3c; }
li { margin-bottom: 0.4rem; }

.card {
  background: #ffffff;
  border-radius: 12px;
  padding: 1.5rem 1.75rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

a { color: #0071e3; text-decoration: none; }
a:hover { text-decoration: underline; }

.btn {
  display: inline-block;
  background: #0071e3;
  color: #ffffff !important;
  padding: 0.7rem 1.75rem;
  border-radius: 980px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none !important;
  transition: background 0.15s;
}
.btn:hover { background: #0077ed; }

.note {
  background: #fff8e6;
  border: 1px solid #ffe08a;
  border-radius: 8px;
  padding: 0.9rem 1.1rem;
  margin: 1rem 0;
  font-size: 0.95rem;
  color: #5c4a00;
}

.meta { color: #86868b; font-size: 0.9rem; margin-top: 2.5rem; }

footer {
  text-align: center;
  padding: 2rem 1rem 2.5rem;
  color: #86868b;
  font-size: 0.85rem;
  border-top: 1px solid #e5e5ea;
  background: #ffffff;
}
footer a { color: #86868b; }