/* 使用说明页（在 style.css 的基础上） */
.help { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 32px; align-items: start; padding-top: 28px; padding-bottom: 24px; }
.help-nav { position: sticky; top: 84px; display: grid; gap: 2px; }
.help-nav a { color: var(--muted); text-decoration: none; font-size: 14px; padding: 6px 10px; border-radius: 8px; }
.help-nav a:hover { background: var(--surface-2); color: var(--text); }
.help-main { display: grid; gap: 40px; min-width: 0; }
.help-section { display: grid; gap: 14px; scroll-margin-top: 80px; }
.help-section > p { margin: 0; }
.help-section h2 { font-size: 22px; }
.help-card { padding: 18px 20px; display: grid; gap: 12px; }
.help-card p { margin: 0; }
.help-card h3 { font-size: 16px; }

/* 四步流程 */
.flow { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.flow li { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 14px; padding: 16px 18px; }
.flow li p { margin: 4px 0 0; }
.flow li h3 { font-size: 16px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.flow li .btn { margin-top: 10px; }
.flow-n {
  width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; font-size: 14px;
  background: var(--primary-soft); color: var(--primary);
}
.flow-key { border-color: var(--primary); }
.flow-key .flow-n { background: var(--primary); color: var(--primary-ink); }

/* 报告图例 */
.legend { margin: 0; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 10px 14px; align-items: center; font-size: 14px; }
.legend dt { margin: 0; }
.legend dd { margin: 0; }
.sev-e { background: var(--error-soft); color: var(--error); }
.sev-w { background: var(--warning-soft); color: var(--warning); }
.sev-i { background: var(--info-soft); color: var(--info); }
.tips { margin: 0; padding-left: 20px; display: grid; gap: 6px; font-size: 14px; }

/* 更新目录 */
.help-tabs { margin-top: 4px; }
.howto { margin: 0; padding-left: 22px; display: grid; gap: 16px; }
.howto li { padding-left: 4px; }
.howto li > p + * { margin-top: 10px; }
.howto li > * + p { margin-top: 6px; }
kbd {
  display: inline-block; min-width: 24px; padding: 1px 7px; border-radius: 6px; text-align: center;
  font: 600 12.5px/1.6 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  background: var(--surface); color: var(--text); border: 1px solid var(--border-strong); box-shadow: 0 2px 0 var(--border-strong);
}
.ui-btn {
  display: inline-block; padding: 0 8px; border-radius: 5px; font-size: 13px; line-height: 1.7;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text); white-space: nowrap;
}
.ui-btn-primary { background: var(--primary); border-color: var(--primary); color: var(--primary-ink); }

/* 软件界面示意图（代替截图） */
.mock-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: flex-start; }
.mock-dialog, .mock-menu, .mock-ribbon {
  border: 1px solid var(--border-strong); border-radius: 8px; background: var(--surface); font-size: 13px;
  box-shadow: 0 6px 18px rgba(23, 28, 44, .1); max-width: 100%;
}
.mock-dialog { width: 360px; padding: 0 0 12px; overflow: hidden; }
.mock-dialog.small-dialog { width: 220px; }
.mock-dialog p { margin: 10px 14px 0; line-height: 1.6; }
.mock-dialog .radio { margin-top: 6px; color: var(--muted); }
.mock-dialog .radio.on { color: var(--text); font-weight: 600; }
.mock-title { background: var(--surface-2); border-bottom: 1px solid var(--border); padding: 6px 14px; font-weight: 600; font-size: 12px; color: var(--muted); }
.mock-actions { display: flex; gap: 8px; justify-content: flex-end; margin: 12px 14px 0; }
.mock-menu { width: 160px; padding: 6px 0; }
.mock-menu div { padding: 4px 14px; color: var(--muted); }
.mock-menu div.on, .mock-ribbon .on { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.mock-ribbon { padding: 8px 10px; display: flex; flex-wrap: wrap; gap: 4px 6px; width: 460px; }
.mock-ribbon > span { padding: 2px 10px; border-radius: 6px; color: var(--muted); }
.mock-ribbon-tools { flex-basis: 100%; display: flex; flex-wrap: wrap; gap: 6px; border-top: 1px solid var(--border); padding-top: 8px; margin-top: 4px; }
.mock-ribbon-tools span { padding: 3px 10px; border-radius: 6px; border: 1px solid var(--border); color: var(--muted); }
.check-list { border-left: 3px solid var(--ok); }

/* 常见问题 */
.faq { display: grid; gap: 8px; }
.faq details { padding: 0; }
.faq summary { cursor: pointer; padding: 14px 18px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--muted); font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0; padding: 0 18px 16px; color: var(--muted); font-size: 14px; }

@media (max-width: 760px) {
  .help { grid-template-columns: minmax(0, 1fr); gap: 20px; padding-top: 20px; }
  .help-nav { position: static; display: flex; flex-wrap: wrap; gap: 4px; }
  .help-nav a { background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px; font-size: 13px; }
  .help-main { gap: 32px; }
  .flow li { padding: 14px; gap: 12px; }
  .help-card { padding: 16px; }
  .legend { grid-template-columns: minmax(0, 1fr); gap: 4px 0; }
  .legend dd { margin-bottom: 8px; }
}