:root {
  --background: #f7f7f5;
  --surface: #ffffff;
  --text: #202124;
  --muted: #64676c;
  --line: #deded8;
  --accent: #245a73;
  --accent-dark: #173e50;
  --content-width: 1040px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family:
    "Noto Sans TC",
    "PingFang TC",
    "Microsoft JhengHei",
    system-ui,
    sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(247, 247, 245, 0.96);
  border-bottom: 1px solid var(--line);
}

.header-inner,
.footer-inner,
.site-main {
  width: min(calc(100% - 32px), var(--content-width));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  color: var(--text);
  text-decoration: none;
  line-height: 1.35;
}

.brand span {
  color: var(--muted);
  font-size: 0.82rem;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.main-nav a {
  color: var(--muted);
  font-size: 0.92rem;
  text-decoration: none;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--accent-dark);
}

.site-main {
  padding: 56px 0 80px;
}

.page {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: clamp(28px, 5vw, 64px);
}

.page-header,
.hero {
  max-width: 800px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 700;
}

h1,
h2,
h3,
h4 {
  line-height: 1.35;
  letter-spacing: -0.02em;
}

h1 {
  margin: 0 0 22px;
  font-size: clamp(2rem, 6vw, 3.7rem);
}

h2 {
  margin-top: 48px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 1.55rem;
}

h3 {
  margin-top: 36px;
  font-size: 1.24rem;
}

h4 {
  margin-top: 28px;
  font-size: 1.08rem;
}

.lead {
  color: var(--muted);
  font-size: 1.08rem;
}

.content {
  max-width: 820px;
}

.content ul {
  padding-left: 1.3rem;
}

.content li + li {
  margin-top: 0.35rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

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

.page-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 48px;
}

.page-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 112px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfbfa;
  color: var(--text);
  text-decoration: none;
}

.page-card:hover {
  border-color: var(--accent);
}

.page-card span {
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer {
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 16px;
}

@media (max-width: 760px) {
  .header-inner,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .header-inner {
    padding: 16px 0;
  }

  .main-nav {
    gap: 10px 16px;
  }

  .site-main {
    padding-top: 24px;
  }

  .page {
    border-radius: 12px;
    padding: 24px 20px;
  }

  .page-links {
    grid-template-columns: 1fr;
  }
}