.mode-guide {
  --guide-accent: #5950af;
  --guide-border: #d9d3eb;
  --guide-soft: #f3f1fa;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", system-ui, sans-serif;
  margin-top: 18px;
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.mode-guide-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.mode-guide-kicker {
  margin-bottom: 9px;
  color: var(--guide-accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.mode-guide-header h2 {
  margin-bottom: 10px;
  font-size: clamp(24px, 2.5vw, 30px);
  line-height: 1.3;
}

.mode-guide-description {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.mode-guide-hint {
  flex-shrink: 0;
  margin: 0;
  padding: 9px 14px;
  border: 1px solid var(--guide-border);
  border-radius: 999px;
  background: var(--guide-soft);
  color: var(--guide-accent);
  font-size: 12px;
  font-weight: 650;
}

.mode-guide-accordion {
  display: grid;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--guide-border);
  border-radius: 20px;
  background: #fcfbfe;
}

.mode-guide-item {
  overflow: hidden;
  border: 1px solid var(--guide-border);
  border-radius: 12px;
  background: #fff;
  transition: border-color 160ms ease;
}

.mode-guide-item.is-open {
  border-color: #a59acc;
}

.mode-guide-heading {
  margin: 0;
  font-size: inherit;
}

.mode-guide-trigger {
  display: flex;
  width: 100%;
  min-height: 80px;
  align-items: center;
  gap: 18px;
  padding: 20px 24px;
  border: 0;
  background: #fff;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: background 160ms ease;
}

.mode-guide-trigger:hover {
  background: #f9f7fe;
}

.mode-guide-trigger:focus-visible {
  position: relative;
  z-index: 1;
  outline: 3px solid var(--guide-accent);
  outline-offset: -4px;
  border-radius: 11px;
}

.mode-guide-number {
  display: grid;
  flex: 0 0 36px;
  height: 36px;
  place-items: center;
  border-radius: 50%;
  background: var(--guide-accent);
  color: #fff;
  font-size: 13px;
  font-weight: 750;
  font-variant-numeric: tabular-nums;
}

.mode-guide-label {
  flex: 1;
  font-size: 18px;
  font-weight: 750;
  line-height: 1.5;
}

.mode-guide-arrow {
  width: 11px;
  height: 11px;
  flex: 0 0 11px;
  margin: -5px 4px 0 8px;
  border-right: 2px solid var(--guide-accent);
  border-bottom: 2px solid var(--guide-accent);
  transform: rotate(45deg);
  transition: transform 180ms ease;
}

.mode-guide-trigger[aria-expanded="true"] .mode-guide-arrow {
  transform: translateY(5px) rotate(225deg);
}

.mode-guide-panel {
  padding: 28px 32px;
  border-top: 1px solid var(--guide-border);
  background: #faf9fd;
}

.mode-guide-panel[hidden] {
  display: none;
}

.mode-guide-copy {
  display: grid;
  max-width: 1120px;
  margin: 0 auto;
  color: #484555;
  font-size: 16px;
  line-height: 1.85;
  overflow-wrap: break-word;
}

.mode-guide-block {
  min-width: 0;
}

.mode-guide-block h4 {
  margin: 0 0 12px;
  color: #393453;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.85;
}

.mode-guide-block p {
  margin: 0;
}

.mode-guide-block ul,
.mode-guide-block ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.mode-guide-block ul li {
  position: relative;
  padding-left: 18px;
}

.mode-guide-block ul li + li {
  margin-top: 10px;
}

.mode-guide-block ul li::before {
  position: absolute;
  top: 0.78em;
  left: 1px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #a39abf;
  content: "";
}

.mode-guide-copy--definitions .mode-guide-block {
  display: grid;
  grid-template-columns: 6em minmax(0, 1fr);
  gap: 24px;
  align-items: baseline;
}

.mode-guide-copy--definitions .mode-guide-block + .mode-guide-block {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid #e9e5f1;
}

.mode-guide-copy--definitions h4 {
  margin: 0;
  color: #665b85;
  font-size: 15px;
  font-weight: 650;
}

.mode-guide-copy--comparison {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 36px;
}

.mode-guide-copy--comparison .mode-guide-block + .mode-guide-block {
  padding-left: 36px;
  border-left: 1px solid #ded8eb;
}

.mode-guide-copy--comparison h4 {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mode-guide-copy--comparison h4::before {
  width: 3px;
  height: 16px;
  border-radius: 2px;
  background: #8b80b4;
  content: "";
}

.mode-guide-copy--precautions ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 36px;
  counter-reset: guide-point;
}

.mode-guide-copy--precautions li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  counter-increment: guide-point;
}

.mode-guide-copy--precautions li::before {
  color: #8578aa;
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  content: counter(guide-point, decimal-leading-zero);
}

@media (max-width: 720px) {
  .mode-guide {
    padding: 20px 14px;
  }

  .mode-guide-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 18px;
  }

  .mode-guide-accordion {
    gap: 10px;
    padding: 8px;
    border-radius: 16px;
  }

  .mode-guide-trigger {
    min-height: 76px;
    gap: 12px;
    padding: 16px 14px;
  }

  .mode-guide-number {
    flex-basis: 30px;
    height: 30px;
    font-size: 12px;
  }

  .mode-guide-label {
    font-size: 16px;
  }

  .mode-guide-arrow {
    margin-left: 2px;
  }

  .mode-guide-panel {
    padding: 22px 20px;
  }

  .mode-guide-copy {
    font-size: 15px;
  }

  .mode-guide-copy--definitions .mode-guide-block {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .mode-guide-copy--comparison,
  .mode-guide-copy--precautions ol {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .mode-guide-copy--comparison .mode-guide-block + .mode-guide-block {
    padding-top: 20px;
    padding-left: 0;
    border-top: 1px solid #e9e5f1;
    border-left: 0;
  }

  .mode-guide-copy--comparison h4 {
    margin-bottom: 9px;
  }

  .mode-guide-copy--precautions li {
    grid-template-columns: 24px minmax(0, 1fr);
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mode-guide-item,
  .mode-guide-trigger,
  .mode-guide-arrow {
    transition: none;
  }
}