@font-face {
  font-family: 'DotGothic16';
  src: url('../assets/DotGothic16-Regular.ttf') format('truetype');
  font-display: swap;
}

:root {
  --po-bg: #f6f8f7;
  --po-panel: #ffffff;
  --po-line: #e4e9e7;
  --po-text: #17211d;
  --po-accent: #14a97c;
  --po-accent-dark: #0e8f66;
  --po-sub: #5b6b64;
  --po-tone: #e6f6f0;
  --po-font-pixel: 'DotGothic16', monospace;
  --po-font-body: 'PingFang TC', 'Noto Sans TC', system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--po-bg);
  color: var(--po-text);
  font-family: var(--po-font-body);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--po-accent-dark); text-decoration: underline; text-underline-offset: 3px; }
a:hover { background: var(--po-accent-dark); color: #fff; text-decoration: none; }

.wrap { max-width: 720px; margin: 0 auto; padding: 0 24px; }

/* ---------- topbar ---------- */
.topbar { border-bottom: 2px solid var(--po-text); background: var(--po-panel); }
.topbar .wrap { display: flex; align-items: center; gap: 10px; height: 60px; }
.mark { width: 10px; height: 10px; background: var(--po-accent); border-radius: 4px; }
.wordmark { font-weight: 900; font-size: 15px; letter-spacing: 0.02em; }
.topbar a { text-decoration: none; color: inherit; display: flex; align-items: center; gap: 10px; }
.topbar a:hover { background: none; color: inherit; }
.topbar a:hover .wordmark { color: var(--po-accent-dark); }

/* ---------- page ---------- */
main { padding: 72px 0 40px; }

.cap {
  font-family: var(--po-font-pixel);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--po-accent-dark);
  display: block;
  margin-bottom: 10px;
}

h1 { font-size: 32px; font-weight: 900; line-height: 1.35; margin: 0 0 12px; text-wrap: balance; }
.updated { color: var(--po-sub); font-size: 13px; margin: 0 0 44px; }

h2 {
  font-size: 19px; font-weight: 900; line-height: 1.5;
  margin: 48px 0 14px; padding-top: 22px;
  border-top: 2px solid var(--po-line);
}
h3 { font-size: 16px; font-weight: 900; margin: 28px 0 8px; }

p { margin: 0 0 16px; }
ul, ol { margin: 0 0 16px; padding-left: 22px; }
li { margin-bottom: 8px; }
li::marker { color: var(--po-accent-dark); }

strong { font-weight: 900; }

.callout {
  background: var(--po-tone);
  border: 2px solid var(--po-accent-dark);
  border-radius: 4px;
  padding: 18px 20px;
  margin: 0 0 28px;
  font-size: 15px;
}
.callout p:last-child { margin-bottom: 0; }

.plain {
  background: var(--po-panel);
  border: 2px solid var(--po-text);
  border-radius: 2px;
  box-shadow: 4px 4px 0 var(--po-text);
  padding: 18px 20px;
  margin: 0 0 28px;
  font-size: 15px;
}
.plain p:last-child { margin-bottom: 0; }
.plain .cap { margin-bottom: 6px; }

table { width: 100%; border-collapse: collapse; margin: 0 0 20px; font-size: 15px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--po-line); vertical-align: top; }
th { font-weight: 900; border-bottom: 2px solid var(--po-text); }
.table-scroll { overflow-x: auto; }

.contact-box {
  border: 2px solid var(--po-text);
  border-radius: 2px;
  padding: 20px 22px;
  margin: 32px 0;
  background: var(--po-panel);
}
.contact-box dl { margin: 0; display: grid; grid-template-columns: 92px 1fr; gap: 6px 16px; font-size: 15px; }
.contact-box dt { color: var(--po-sub); }
.contact-box dd { margin: 0; font-weight: 700; }

/* ---------- footer ---------- */
footer { border-top: 2px solid var(--po-line); margin-top: 72px; padding: 40px 0 64px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: 14px; margin-bottom: 20px; }
.foot-links a { text-decoration: none; }
.foot-links a:hover { text-decoration: none; }
.foot-meta { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--po-sub); }
.foot-meta .mark { width: 8px; height: 8px; }

@media (max-width: 600px) {
  main { padding: 48px 0 32px; }
  h1 { font-size: 26px; }
  .contact-box dl { grid-template-columns: 1fr; gap: 2px; }
  .contact-box dt { margin-top: 8px; }
}