:root {
  --bg: #faf8f5;
  --panel: #fff;
  --ink: #2a2724;
  --ink-2: #6b645c;
  --line: #e3ddd4;
  --wood: #a8763e;
  --max: 1100px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang TC", "Noto Sans TC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { display: block; width: 100%; height: auto; }

/* 主視覺 */
.hero { position: relative; background: #000; }
.hero img { opacity: .96; }
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 45%;
  background: linear-gradient(to top, rgba(0,0,0,.55), transparent);
  pointer-events: none;
}

.hero-caption {
  position: absolute;
  z-index: 1;
  left: 6vw;
  bottom: 6vw;
  color: #fff;
  text-shadow: 0 1px 24px rgba(0,0,0,.5);
}
.hero-caption h1 {
  margin: 0;
  font-size: clamp(1.6rem, 4.5vw, 3rem);
  font-weight: 500;
  letter-spacing: .08em;
}
.hero-caption p {
  margin: .3em 0 0;
  font-size: clamp(.8rem, 1.6vw, 1rem);
  letter-spacing: .14em;
  opacity: .82;
  font-variant-numeric: tabular-nums;
}

/* 導覽 */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  gap: 1.6rem;
  padding: .9rem 6vw;
  background: rgba(250,248,245,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  font-size: .875rem;
}
.nav a {
  color: var(--ink-2);
  text-decoration: none;
  letter-spacing: .06em;
}
.nav a:hover { color: var(--wood); }

/* 區塊 */
main { max-width: var(--max); margin: 0 auto; padding: 0 6vw; }

.section { padding: 4.5rem 0; border-bottom: 1px solid var(--line); }
.section:last-child { border-bottom: 0; }

h2 {
  margin: 0 0 2rem;
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: .1em;
}
h3 {
  margin: 2.4rem 0 .8rem;
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .06em;
}
h3:first-of-type { margin-top: 0; }
.sub {
  margin-left: .8em;
  font-size: .8rem;
  font-weight: 400;
  color: var(--ink-2);
  letter-spacing: 0;
}

/* 圖組 */
figure { margin: 0; }
figure a { display: block; }
figure img {
  border: 1px solid var(--line);
  background: var(--panel);
}
figcaption {
  margin-top: .6rem;
  font-size: .8rem;
  color: var(--ink-2);
  letter-spacing: .06em;
}
.wide { margin-top: 2.5rem; }

/* 編號標記 */
.marked { position: relative; }
.mark {
  display: grid;
  place-items: center;
  width: 1.7em;
  height: 1.7em;
  border-radius: 50%;
  background: var(--wood);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1;
  box-shadow: 0 1px 6px rgba(0,0,0,.35);
}
.marked .mark {
  position: absolute;
  transform: translate(-50%, -50%);
}
.mark.inline { display: inline-grid; flex: none; font-size: .8rem; }

/* 圖例 */
.keys {
  margin: 1.8rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .7rem;
}
.keys li {
  display: flex;
  align-items: baseline;
  gap: .75rem;
  font-size: .9rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: .7rem;
}
.keys b { font-weight: 600; min-width: 6em; }
.keys span:last-child { color: var(--ink-2); font-variant-numeric: tabular-nums; }

/* 表格 */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
th, td {
  text-align: left;
  padding: .55rem .8rem .55rem 0;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { font-weight: 500; width: 8em; }
td.num {
  min-width: 12em;
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}
td:last-child { color: var(--ink-2); }

/* 差異 */
.lead { color: var(--ink-2); margin-top: 0; font-size: .9rem; }
.diffs { margin: 1.4rem 0 0; padding: 0; list-style: none; display: grid; gap: .8rem; }
.diffs li {
  font-size: .9rem;
  color: var(--ink-2);
  border-left: 2px solid var(--wood);
  padding: .1rem 0 .1rem 1rem;
}
.diffs b { color: var(--ink); font-weight: 600; margin-right: .7em; }

footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem 6vw 4rem;
  font-size: .8rem;
  color: var(--ink-2);
}
footer p { margin: 0; }

@media (max-width: 760px) {
  .keys li { flex-wrap: wrap; gap: .5rem; }
  .keys b { min-width: 0; }
  .keys span:last-child { flex: 1 1 100%; padding-left: 2.2rem; }
  th { width: 6.5em; }
  td.num { min-width: 0; }
}

/* 360 環顧頁 */
.tour-body { height: 100dvh; overflow: hidden; background: #000; }
#pano { position: fixed; inset: 0; }

.tour-back,
.tour-hint {
  position: fixed;
  z-index: 5;
  font-size: .8rem;
  letter-spacing: .06em;
  color: #fff;
  background: rgba(0,0,0,.45);
  backdrop-filter: blur(6px);
  padding: .5rem .9rem;
  border-radius: 999px;
  margin: 0;
}
.tour-back { top: 1rem; left: 1rem; text-decoration: none; }
.tour-back:hover { background: rgba(0,0,0,.65); }
.tour-hint { bottom: 1rem; left: 50%; transform: translateX(-50%); white-space: nowrap; }

/* 主頁的環顧入口 */
.tour-link {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin-top: 1.5rem;
  padding: .7rem 1.3rem;
  border: 1px solid var(--wood);
  border-radius: 999px;
  color: var(--wood);
  text-decoration: none;
  font-size: .875rem;
  letter-spacing: .06em;
}
.tour-link:hover { background: var(--wood); color: #fff; }

@media (max-width: 760px) {
  .tour-hint { font-size: .72rem; }
}