.tool-guide {
  width: min(100%, 1018px);
  margin: 0 auto;
  padding: 56px 24px 24px;
  color: #475569;
  font-size: 16px;
  line-height: 1.85;
  overflow-wrap: break-word;
}
.tool-guide h2 {
  margin: 0 0 28px;
  color: #334155;
  font-size: clamp(24px, 3vw, 30px);
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
}
.tool-guide h3 {
  margin: 36px 0 12px;
  color: #334155;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.5;
}
.tool-guide p { margin: 0 0 18px; }
.tool-guide a {
  color: #2563eb;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.tool-guide a:hover { color: #1d4ed8; }
.tool-guide a:focus-visible { outline: 2px solid currentColor; outline-offset: 3px; }
.dark .tool-guide { color: #cbd5e1; }
.dark .tool-guide h2, .dark .tool-guide h3 { color: #f1f5f9; }
.dark .tool-guide a { color: #93c5fd; }
@media (max-width: 640px) {
  .tool-guide { padding: 36px 20px 16px; line-height: 1.8; }
  .tool-guide h2 { margin-bottom: 24px; }
  .tool-guide h3 { margin-top: 28px; font-size: 19px; }
}