:root {
  --bg: #f7f6f2;
  --text: #2c2c2c;
  --card: #ffffff;
  --accent: #e07a5f;
  --muted: #7a7a72;
}

body.dark {
  --bg: #1e1e24;
  --text: #ececec;
  --card: #2a2a32;
  --accent: #f2a58b;
  --muted: #a9a9b2;
}

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

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background 0.3s ease, color 0.3s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: min(960px, 90%);
  margin: 0 auto;
}

.hero {
  text-align: center;
  padding: 5rem 0 3rem;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--muted);
  font-size: 1.15rem;
  margin-bottom: 1.5rem;
}

button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

button:hover {
  transform: translateY(-2px);
  opacity: 0.9;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  padding: 2rem 0;
}

.card {
  background: var(--card);
  padding: 2rem 1.5rem;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transition: transform 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
}

.emoji {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.card h2 {
  margin-bottom: 0.5rem;
}

.card p {
  color: var(--muted);
}

.quote {
  background: var(--card);
  border-left: 4px solid var(--accent);
  border-radius: 12px;
  padding: 1.5rem 2rem;
  margin: 1.5rem 0 3rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

#quote-text {
  font-size: 1.25rem;
  font-style: italic;
}

.quote button {
  align-self: flex-start;
}

footer {
  text-align: center;
  padding: 2rem 0;
  color: var(--muted);
  margin-top: auto;
}