:root {
  --paper: #f7f3ea;
  --paper-deep: #ede5d6;
  --ink: #1e2933;
  --muted: #66717b;
  --blue: #165d86;
  --blue-soft: #dbeaf1;
  --red: #a94436;
  --red-soft: #f4dfd8;
  --line: #d6cbbb;
  --white: #fffdf8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Georgia, "Noto Serif TC", serif;
  line-height: 1.75;
}

a { color: var(--blue); }

.wrap {
  width: min(960px, calc(100% - 36px));
  margin: 0 auto;
}

.hero {
  padding: 64px 0 46px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(145deg, var(--paper), #efe6d7);
}

.eyebrow {
  color: var(--red);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .76rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1, h2, h3 { line-height: 1.25; }
h1 { max-width: 780px; margin: 12px 0 18px; font-size: clamp(2.2rem, 6vw, 4.5rem); font-weight: 500; }
h2 { margin-top: 2.8rem; font-size: 1.75rem; }
h3 { font-size: 1.15rem; }

.dek { max-width: 700px; color: var(--muted); font-size: 1.12rem; }
.meta { color: var(--muted); font-size: .92rem; }

main { padding: 12px 0 72px; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.card, .callout, details {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 253, 248, .72);
}
.card h3 { margin-top: 0; }
.callout { border-left: 5px solid var(--blue); }
.warning { border-left-color: var(--red); background: var(--red-soft); }

ul, ol { padding-left: 1.35rem; }
li + li { margin-top: .35rem; }

figure { margin: 28px 0; }
figure img { width: 100%; display: block; border: 1px solid var(--line); border-radius: 12px; background: var(--white); }
figcaption { margin-top: 9px; color: var(--muted); font-size: .88rem; }

table { width: 100%; border-collapse: collapse; margin: 20px 0; background: rgba(255, 253, 248, .66); }
th, td { padding: 12px 13px; border: 1px solid var(--line); vertical-align: top; text-align: left; }
th { background: var(--paper-deep); font-weight: 600; }

details { margin: 14px 0; }
summary { cursor: pointer; font-weight: 700; color: var(--blue); }

.prompt { border-left: 4px solid var(--blue); padding: 15px 18px; background: var(--blue-soft); }
.answer-box { min-height: 110px; width: 100%; padding: 12px; resize: vertical; border: 1px solid var(--line); border-radius: 8px; background: var(--white); font: inherit; }
.small { color: var(--muted); font-size: .88rem; }
.tag { display: inline-block; margin: 3px 5px 3px 0; padding: 2px 9px; border-radius: 99px; background: var(--blue-soft); color: var(--blue); font-size: .82rem; }
.tag.red { background: var(--red-soft); color: var(--red); }
.footer { margin-top: 50px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: .88rem; }

@media (max-width: 700px) {
  .wrap { width: min(100% - 24px, 960px); }
  .hero { padding-top: 40px; }
  .grid { grid-template-columns: 1fr; }
  th, td { padding: 9px; font-size: .93rem; }
}