.tool-page-workspace .content-header { align-items: flex-start; }
.tool-page-workspace .content-header h1 { font-size: 25px; line-height: 1.5; }
.tool-lead { max-width: 820px; margin: 0; font-size: 13px; color: var(--muted); line-height: 1.9; }
.tool-page-surface .tool-page-app { padding: 0; margin: 0; }
.tool-home-button { display: grid; place-items: center; width: 30px; height: 32px; border: 1px solid var(--line); border-radius: 4px; background: #fff; }
.tool-reading-layout { display: grid; grid-template-columns: minmax(0, 1fr) 230px; gap: 32px; padding: 28px; margin-top: 28px; border-top: 1px solid var(--line); background: #fff; }
.tool-reading { min-width: 0; }
.tool-reading .source-note { margin: 0 0 22px; }
.tool-reading .guide-toc { margin-top: 0; }
.tool-reading .explanation-section { margin: 28px 0 0; padding: 0 0 26px; border-bottom: 1px solid var(--line); scroll-margin-top: 20px; }
.tool-reading .explanation-section h2 { margin-bottom: 14px; font-size: 17px; }
.tool-reading .explanation-section p { color: #4d5e70; line-height: 1.95; }
.tool-related { min-width: 0; align-self: start; padding-left: 24px; border-left: 1px solid var(--line); }
.tool-related h2 { font-size: 14px; margin-bottom: 12px; }
.tool-related-list { list-style: none; margin: 0; padding: 0; }
.tool-related-list a { display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 44px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 12px; color: #4c6582; }
.tool-related-list a:hover { color: var(--tone); }
.tool-guide-index { display: flex; align-items: center; gap: 8px; padding-top: 20px; color: var(--tone); font-size: 12px; }
.tool-guide-index svg:last-child { margin-left: auto; width: 13px; }
.tool-editor-note { margin: 24px 0 0; color: var(--muted); font-size: 11px; line-height: 1.9; }
.tool-page-footer { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 11px; color: var(--muted); }
.tool-page-workspace .breadcrumb { flex-wrap: wrap; white-space: normal; gap: 6px 10px; }
@media (max-width: 1150px) {
  .tool-reading-layout { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .tool-related { border-left: 0; border-top: 1px solid var(--line); padding: 22px 0 0; }
  .tool-related-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 24px; }
}
@media (max-width: 700px) {
  .tool-page-workspace .content-header h1 { font-size: 21px; }
  .tool-lead { font-size: 12px; }
  .tool-reading-layout { padding: 22px 16px; margin-top: 20px; }
  .tool-reading .explanation-section h2 { font-size: 16px; }
  .tool-related-list { gap: 0 16px; }
}