/* 基本樣式，可以全改。改之前建議先在 Claude / Cursor 跟 AI 討論 */

:root {
  --brand: #ff6b00;
  --ink: #1a1a1a;
  --muted: #666;
  --bg: #fff;
  --card: #f7f7f7;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "PingFang TC", "Microsoft JhengHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

main { max-width: 960px; margin: 0 auto; padding: 0 20px; }

.hero {
  padding: 80px 0;
  text-align: center;
}
.hero h1 { font-size: 2.5rem; margin: 0 0 16px; }
.hero .sub { font-size: 1.1rem; color: var(--muted); margin: 0 0 32px; }

.cta {
  display: inline-block;
  background: var(--brand);
  color: white;
  padding: 14px 32px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  padding: 40px 0;
}
.features article {
  background: var(--card);
  padding: 24px;
  border-radius: 12px;
}
.features h3 { margin: 0 0 12px; }

.cta-section {
  padding: 60px 0;
  text-align: center;
}
oa-form { display: block; max-width: 400px; margin: 0 auto; }
oa-form input {
  display: block;
  width: 100%;
  padding: 12px;
  margin: 8px 0;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 1rem;
}
oa-form button {
  background: var(--brand);
  color: white;
  border: none;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 16px;
}