/* 题库详情页多步使用介绍：聚光 + 黑白说明卡 */
.ps-intro {
  position: fixed;
  inset: 0;
  z-index: 100004;
  opacity: 0;
  transition: opacity 220ms ease;
}
.ps-intro.is-in { opacity: 1; }
.ps-intro.is-out { opacity: 0; pointer-events: none; }
.ps-intro--instant,
.ps-intro--instant.is-in,
.ps-intro--instant.is-out,
.ps-intro--instant .ps-intro__spot,
.ps-intro--instant .ps-intro__card { transition: none; }
.ps-intro__spot {
  position: fixed;
  pointer-events: none;
  border-radius: 12px;
  box-shadow:
    0 0 0 2px #09090b,
    0 0 0 9999px rgba(9, 9, 11, 0.48);
  transition: top 180ms ease, left 180ms ease, width 180ms ease, height 180ms ease;
}
.ps-intro__card {
  position: fixed;
  width: 300px;
  max-width: calc(100vw - 32px);
  margin: 0;
  padding: 14px 14px 12px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 14px;
  background: #fff;
  color: #09090b;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.16);
  box-sizing: border-box;
  transition: top 180ms ease, left 180ms ease;
}
.ps-intro__card::before {
  content: "";
  position: absolute;
  width: 8px;
  height: 8px;
  background: #fff;
  border: 1px solid rgba(15, 23, 42, 0.08);
  transform: rotate(45deg);
}
.ps-intro__card[data-edge="left"]::before { left: -5px; top: 22px; border-right: 0; border-top: 0; }
.ps-intro__card[data-edge="right"]::before { right: -5px; top: 22px; border-left: 0; border-bottom: 0; }
.ps-intro__card[data-edge="top"]::before { top: -5px; left: 28px; border-right: 0; border-bottom: 0; }
.ps-intro__card[data-edge="bottom"]::before { bottom: -5px; left: 28px; border-left: 0; border-top: 0; }
.ps-intro__kicker {
  margin: 0 0 4px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #71717a;
}
.ps-intro__title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: #09090b;
}
.ps-intro__body {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.5;
  color: #52525b;
}
.ps-intro__actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
}
.ps-intro__skip { margin-right: auto; }
.ps-intro__skip,
.ps-intro__prev,
.ps-intro__next {
  height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 650;
  line-height: 1;
  cursor: pointer;
}
.ps-intro__skip {
  border: 0;
  background: transparent;
  color: #71717a;
}
.ps-intro__skip:hover { color: #09090b; }
.ps-intro__prev {
  border: 1px solid #e4e4e7;
  background: #fff;
  color: #3f3f46;
}
.ps-intro__prev:hover { background: #f4f4f5; }
.ps-intro__prev[hidden] { display: none; }
.ps-intro__next {
  border: 1px solid #09090b;
  background: #09090b;
  color: #fff;
}
.ps-intro__next:hover { background: #27272a; border-color: #27272a; }
.ps-intro__skip:focus-visible,
.ps-intro__prev:focus-visible,
.ps-intro__next:focus-visible {
  outline: 2px solid #09090b;
  outline-offset: 2px;
}
html[data-theme="dark"] .ps-intro__spot,
html.theme--dark .ps-intro__spot,
html.page--problemset[data-theme="dark"] .ps-intro__spot {
  box-shadow:
    0 0 0 2px #fafafa,
    0 0 0 9999px rgba(0, 0, 0, 0.62);
}
html[data-theme="dark"] .ps-intro__card,
html.theme--dark .ps-intro__card,
html.page--problemset[data-theme="dark"] .ps-intro__card {
  background: #161b22;
  color: #fafafa;
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}
html[data-theme="dark"] .ps-intro__card::before,
html.theme--dark .ps-intro__card::before,
html.page--problemset[data-theme="dark"] .ps-intro__card::before {
  background: #161b22;
  border-color: rgba(255, 255, 255, 0.08);
}
html[data-theme="dark"] .ps-intro__kicker,
html.theme--dark .ps-intro__kicker,
html.page--problemset[data-theme="dark"] .ps-intro__kicker { color: #8b949e; }
html[data-theme="dark"] .ps-intro__title,
html.theme--dark .ps-intro__title,
html.page--problemset[data-theme="dark"] .ps-intro__title { color: #fafafa; }
html[data-theme="dark"] .ps-intro__body,
html.theme--dark .ps-intro__body,
html.page--problemset[data-theme="dark"] .ps-intro__body { color: #b1bac4; }
html[data-theme="dark"] .ps-intro__skip,
html.theme--dark .ps-intro__skip,
html.page--problemset[data-theme="dark"] .ps-intro__skip { color: #8b949e; }
html[data-theme="dark"] .ps-intro__skip:hover,
html.theme--dark .ps-intro__skip:hover,
html.page--problemset[data-theme="dark"] .ps-intro__skip:hover { color: #e6edf3; }
html[data-theme="dark"] .ps-intro__prev,
html.theme--dark .ps-intro__prev,
html.page--problemset[data-theme="dark"] .ps-intro__prev {
  background: #161b22;
  color: #e6edf3;
  border-color: #30363d;
}
html[data-theme="dark"] .ps-intro__prev:hover,
html.theme--dark .ps-intro__prev:hover,
html.page--problemset[data-theme="dark"] .ps-intro__prev:hover { background: #21262d; }
html[data-theme="dark"] .ps-intro__next,
html.theme--dark .ps-intro__next,
html.page--problemset[data-theme="dark"] .ps-intro__next {
  background: #fafafa;
  color: #09090b;
  border-color: #fafafa;
}
html[data-theme="dark"] .ps-intro__next:hover,
html.theme--dark .ps-intro__next:hover,
html.page--problemset[data-theme="dark"] .ps-intro__next:hover {
  background: #fff;
  border-color: #fff;
}