:root {
  --bg: #0b1420;
  --chrome: #101c2c;
  --line: #24405f;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --gold: #c9a227;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang TC", "Microsoft JhengHei", sans-serif;
  display: flex;
  flex-direction: column;
}
.bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 18px;
  background: var(--chrome);
  border-bottom: 1px solid var(--line);
}
.back { color: var(--muted); text-decoration: none; font-size: 13px; white-space: nowrap; }
.back:hover { color: var(--text); }
.title { flex: 1; font-weight: 700; font-size: 15px; letter-spacing: 0.01em; }
.title .sub { color: var(--muted); font-weight: 500; font-size: 12px; margin-left: 8px; }
.dl {
  color: var(--gold);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 14px;
  white-space: nowrap;
}
.dl:hover { border-color: var(--gold); }
.intro {
  width: min(1200px, calc(100% - 36px));
  margin: 22px auto 0;
  padding: 18px 22px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(16, 28, 44, 0.72);
}
.kicker {
  margin: 0 0 7px;
  color: var(--gold);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.intro-copy {
  max-width: 780px;
  margin: 0;
  color: var(--text);
  font-size: 15px;
  line-height: 1.65;
}
.signals {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 12px;
}
.signals span::before { content: "→ "; color: var(--gold); }
.stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px;
  position: relative;
  min-height: 0;
}
.slide {
  margin: 0;
  max-width: min(1200px, 100%);
  max-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.slide img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  background: #fff;
}
.nav {
  background: var(--chrome);
  border: 1px solid var(--line);
  color: var(--text);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 22px;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.15s, color 0.15s;
  z-index: 2;
}
.nav:hover { border-color: var(--gold); color: var(--gold); }
.nav:disabled { opacity: 0.3; cursor: default; }
.nav:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
.foot {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 18px 14px;
  background: var(--chrome);
  border-top: 1px solid var(--line);
}
.footnote { color: var(--muted); font-size: 11px; white-space: nowrap; }
#counter { font-size: 12.5px; color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.progress { flex: 1; height: 4px; background: var(--line); border-radius: 999px; overflow: hidden; }
.fill { height: 100%; width: 0%; background: var(--gold); transition: width 0.25s ease; }
@media (max-width: 640px) {
  .bar { flex-wrap: wrap; gap: 8px; }
  .title { flex-basis: 100%; order: -1; }
  .nav { position: absolute; top: 50%; transform: translateY(-50%); width: 38px; height: 38px; }
  .nav.prev { left: 6px; }
  .nav.next { right: 6px; }
  .stage { padding: 8px 2px; }
  .intro { width: calc(100% - 16px); margin-top: 10px; padding: 14px 15px; }
  .intro-copy { font-size: 14px; }
  .footnote { display: none; }
}