:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1f2430;
  --accent: #f38020;
}

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

body {
  font-family: "Segoe UI", "Microsoft JhengHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  background: linear-gradient(135deg, #f38020, #fd6a02);
  color: #fff;
  padding: 3rem 1.5rem;
  text-align: center;
}

header h1 {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}

header p {
  font-size: 1.05rem;
  opacity: 0.95;
}

main {
  flex: 1;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  width: 100%;
}

.card {
  background: var(--card);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

.card h2 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  color: var(--accent);
}

.card ul {
  padding-left: 1.25rem;
}

.card li {
  margin-bottom: 0.4rem;
}

a {
  color: var(--accent);
}

footer {
  text-align: center;
  padding: 1.25rem;
  color: #7a8497;
  font-size: 0.9rem;
}