:root {
  color-scheme: light;
  --ink: #17212b;
  --muted: #5d6874;
  --line: #d9e0e7;
  --bg: #f4f7f9;
  --surface: #ffffff;
  --accent: #176b73;
  --accent-strong: #0d5057;
  --focus: #1769ff;
}

* {
  box-sizing: border-box;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
}

body {
  margin: 0;
}

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

a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.page {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0;
}

.hero,
.content {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: clamp(24px, 5vw, 48px);
}

.hero {
  min-height: 52vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eyebrow,
.tag {
  margin: 0 0 8px;
  color: var(--accent);
  font-weight: 700;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1.18;
}

h2 {
  margin: 32px 0 8px;
  font-size: 1.3rem;
  line-height: 1.35;
}

h3 {
  margin: 22px 0 4px;
  font-size: 1.05rem;
  line-height: 1.4;
}

p,
ul {
  margin: 0 0 14px;
}

.lead,
.muted {
  color: var(--muted);
}

.lead {
  max-width: 680px;
  font-size: 1.1rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--accent-strong);
  text-decoration: none;
  font-weight: 700;
  background: var(--surface);
}

.button.primary {
  color: #ffffff;
  background: var(--accent);
  border-color: var(--accent);
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 30px;
}

.app-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px;
}

.app-card h2 {
  margin-top: 0;
}

.back {
  margin-top: 24px;
}

@media (max-width: 560px) {
  .page {
    width: min(100% - 20px, 960px);
    padding: 24px 0;
  }

  .hero,
  .content {
    padding: 22px;
  }

  .button {
    width: 100%;
  }
}