body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
               "Noto Sans TC", Arial, sans-serif;
  background: #f5f7fa;
  color: #333;
  line-height: 1.7;
}

header, footer {
  background: #ffffff;
  border-color: #e5e7eb;
}

header {
  border-bottom: 1px solid #e5e7eb;
  padding: 18px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-size: 20px;
  font-weight: 600;
  color: #1f2937;
}

.nav {
  font-size: 14px;
  color: #6b7280;
}

.container {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
}

.card {
  background: #ffffff;
  border-radius: 10px;
  padding: 32px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}

h1 { font-size: 28px; color: #111827; }
h2 { font-size: 20px; margin-top: 32px; color: #1f2937; }

.notice {
  background: #f0f4f8;
  border-left: 4px solid #3b82f6;
  padding: 16px;
  margin: 24px 0;
  font-size: 14px;
}

footer {
  margin-top: 60px;
  padding: 24px;
  border-top: 1px solid #e5e7eb;
  text-align: center;
  font-size: 13px;
  color: #6b7280;
}

footer a {
  color: #6b7280;
  margin: 0 8px;
  text-decoration: none;
}