/* ==========================================================================
   ai-articles 共用元件
   可用於 Jekyll markdown 文章（內嵌 HTML）或特輯 HTML 文章
   ========================================================================== */

/* ---------- 回首頁按鈕 ---------- */
.back-home {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: "IBM Plex Sans TC", "Noto Sans TC", sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--muted, #665f57);
  text-decoration: none;
  border: 1px solid var(--line, rgba(23,20,17,.14));
  border-radius: 999px;
  padding: 7px 16px;
  background: rgba(255,255,255,.5);
  backdrop-filter: blur(8px);
  transition: color .2s, border-color .2s;
}
.back-home:hover {
  color: var(--accent, #b6432f);
  border-color: currentColor;
}

/* ---------- 首字大寫 ---------- */
.dropcap::first-letter {
  float: left;
  font-size: 4.4rem;
  line-height: .88;
  padding-right: 12px;
  padding-top: 10px;
  color: var(--accent, #c44b2b);
  font-weight: 900;
}

/* ---------- 數據卡片 ---------- */
.data-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 28px 0 12px;
}
.data-card {
  padding: 18px;
  border: 1px solid var(--line, rgba(23,20,17,.14));
  border-radius: 18px;
  background: rgba(255,255,255,.5);
}
.data-card .eyebrow {
  font-family: "IBM Plex Sans TC", "Noto Sans TC", sans-serif;
  font-size: 12px;
  color: var(--muted, #665f57);
  text-transform: uppercase;
  letter-spacing: .14em;
}
.data-card .num {
  margin: 8px 0 6px;
  font-size: 2rem;
  line-height: 1;
  font-weight: 900;
}
.data-card p {
  margin: 0;
  font-size: .95rem;
  color: var(--muted, #665f57);
  line-height: 1.75;
}

/* ---------- Callout ---------- */
.callout {
  margin: 34px 0;
  padding: 22px 24px;
  border: 1px solid var(--line, rgba(23,20,17,.14));
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255,255,255,.66), rgba(255,255,255,.38));
}
.callout-title {
  margin: 0 0 8px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .18em;
  color: var(--accent-2, #004d47);
  font-weight: 700;
}
.callout p:last-child { margin-bottom: 0; }

/* ---------- 時間軸 ---------- */
.timeline {
  margin: 30px 0;
  padding-left: 0;
  list-style: none;
  border-left: 1px solid var(--line, rgba(23,20,17,.14));
}
.timeline li {
  position: relative;
  margin-left: 18px;
  padding: 0 0 24px 18px;
}
.timeline li::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 10px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent, #c44b2b);
  box-shadow: 0 0 0 5px rgba(182,67,47,.12);
}
.timeline .date {
  display: block;
  font-family: "IBM Plex Sans TC", "Noto Sans TC", sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent, #c44b2b);
  margin-bottom: 6px;
}

/* ---------- Checklist ---------- */
.checklist {
  margin: 18px 0 28px;
  padding-left: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.checklist li {
  padding: 14px 16px 14px 44px;
  position: relative;
  border-radius: 16px;
  background: rgba(255,255,255,.42);
  border: 1px solid rgba(23,20,17,.09);
}
.checklist li::before {
  content: "\2197";
  position: absolute;
  left: 16px;
  top: 12px;
  font-size: 18px;
  color: var(--accent, #c44b2b);
  font-weight: 700;
}

/* ---------- RWD ---------- */
@media (max-width: 720px) {
  .data-grid { grid-template-columns: 1fr; }
}