/* Tab 默认保持内容可读；由 tabs.js 设置非活动面板 hidden。 */
.tabs { min-width: 0; }
[role="tablist"] { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
[role="tab"] {
  position: relative; min-height: 44px; padding: 10px 20px;
  border: 1px solid var(--line); border-radius: var(--r-pill);
  background: var(--bg); color: var(--muted);
  font-weight: var(--weight-normal); line-height: 1.5;
}
[role="tab"]:hover { border-color: var(--ink); color: var(--ink); }
[role="tab"][aria-selected="true"] {
  border-color: var(--accent); background: var(--bg); color: var(--ink);
  text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 5px;
}
[role="tabpanel"] { min-width: 0; scroll-margin-top: 24px; }
.feature-board {
  display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 48px;
  padding: 48px; background: var(--panel-2); color: var(--ink);
  border-radius: var(--r-board); overflow: hidden;
}
.feature-board [role="tablist"] { flex-direction: column; align-items: stretch; gap: 12px; margin: 0; }
.feature-board [role="tab"] {
  text-align: left; border: 0; border-radius: var(--r-field); background: var(--clear);
  color: var(--muted); padding: 12px 12px 12px 24px;
}
.feature-board [role="tab"][aria-selected="true"] { color: var(--ink); background: var(--clear); text-decoration: none; }
.feature-board [role="tab"][aria-selected="true"]::before {
  content: ""; position: absolute; left: 0; top: 21px; width: 8px; height: 8px;
  border-radius: var(--r-round); background: var(--accent);
}
.feature-fragment {
  margin-right: -80px; margin-bottom: 32px; padding: 28px;
  border: 1px solid var(--line); border-radius: var(--r-card);
  background: var(--bg); color: var(--ink);
}
.feature-fragment .set { height: auto; min-height: 52px; padding-block: 12px; }
.feature-detail p { max-width: 44em; }
.feature-notes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 64px; padding-top: 48px; }
.feature-note { min-width: 0; }
.feature-note__shape { display: block; width: 18px; height: 18px; margin-bottom: 24px; background: var(--ink); border-radius: var(--r-round); }
.feature-note__shape--square { border-radius: var(--r-small); }
.feature-note h3 { margin: 0 0 8px; }
.feature-note p { color: var(--muted); margin-bottom: 20px; }

.toc {
  position: sticky; top: 0; z-index: 12; display: flex; flex-wrap: wrap; gap: 8px 20px;
  padding: 16px 20px; margin-bottom: 40px;
  background: var(--bg); color: var(--ink); border: 1px solid var(--line); border-radius: var(--r-card);
}
.toc a { display: inline-flex; align-items: center; min-height: 32px; font-size: var(--small-size); text-decoration: none; }
.toc a:hover, .toc a[aria-current] { text-decoration: underline; text-decoration-color: var(--accent); }
.toc--flow { position: static; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  position: relative; padding: 24px 40px 24px 0; list-style: none; cursor: pointer;
  font-size: 18px; color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 8px; top: 24px; font-family: var(--font-mono); }
.faq-item[open] summary::after { content: "−"; }
.faq-item__answer { padding-bottom: 24px; color: var(--muted); max-width: 64em; }
.faq-item__answer > :last-child { margin-bottom: 0; }
.term-card { padding: 28px 0; border-top: 1px solid var(--line); }
.term-card h3 { margin: 0 0 12px; }
.term-card p { color: var(--muted); }
.term-card__category { display: block; margin-bottom: 12px; font-size: 13px; color: var(--muted); }
.client-card { padding: 32px; border: 1px solid var(--line); border-radius: var(--r-card); background: var(--bg); color: var(--ink); }
.client-card__head { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-bottom: 20px; }
.client-card__head h3 { margin: 0; }
.client-card__version { font-family: var(--font-mono); font-size: 13px; color: var(--muted); }
.client-card__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.client-card__foot { margin-top: 20px; font-size: var(--small-size); color: var(--muted); }
.badge, .tag {
  display: inline-block; max-width: 100%; overflow: hidden;
  padding: 4px 11px; border: 1px solid var(--line); border-radius: var(--r-pill);
  background: var(--bg); color: var(--muted); font-size: 12px; line-height: 1.5;
  vertical-align: middle; overflow-wrap: anywhere;
}
.badge--first { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.badge--recommended { background: var(--panel); color: var(--ink); border-color: var(--panel); }
.badge--retired { background: var(--line); color: var(--ink); border-color: var(--line); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.article-card { padding: 28px 0; border-top: 1px solid var(--line); min-width: 0; }
.article-card__meta { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-bottom: 20px; color: var(--muted); font-size: 13px; }
.article-card h3 { margin: 0 0 16px; }
.article-card h3 a { text-decoration: none; }
.article-card h3 a:hover { text-decoration: underline; text-decoration-color: var(--accent); }
.article-card p { color: var(--muted); }
.callout {
  margin: 28px 0; padding: 24px 28px;
  border-left: 3px solid var(--accent); border-radius: var(--r-inner);
  background: var(--panel-2); color: var(--ink);
}
.callout--note { background: var(--panel); color: var(--ink); }
.callout > :last-child { margin-bottom: 0; }
.table-scroll { overflow-x: auto; max-width: 100%; min-width: 0; overscroll-behavior-inline: contain; -webkit-overflow-scrolling: touch; }
.data-table { width: 100%; border-collapse: collapse; text-align: left; font-size: var(--small-size); }
.data-table th, .data-table td, .prose table th, .prose table td {
  min-width: 7em; padding: 16px 20px; border-bottom: 1px solid var(--line);
  vertical-align: top; overflow-wrap: normal; word-break: normal;
}
.data-table th, .prose table th { background: var(--panel); color: var(--ink); font-weight: var(--weight-normal); }
.prose table {
  display: block; overflow-x: auto; -webkit-overflow-scrolling: touch;
  max-width: 100%; min-width: 0; border-collapse: collapse; text-align: left;
}
.data-table code, .prose table code { overflow-wrap: anywhere; word-break: normal; }
.article-download {
  margin-top: 48px; padding: 32px; border-radius: var(--r-card);
  background: var(--panel); color: var(--ink);
}
.article-download h2 { margin: 0 0 16px; font-size: 26px; }
.article-download p { color: var(--muted); }
.dl-fab {
  position: fixed; right: 24px; bottom: 24px; z-index: 20;
  display: inline-flex; align-items: center; gap: 12px;
  max-width: calc(100vw - 32px); min-height: 56px; padding: 12px 20px;
  border: 1px solid var(--bg); border-radius: var(--r-pill);
  background: var(--accent); color: var(--bg); text-decoration: none; font-size: var(--small-size);
}
.dl-fab:hover { background: var(--accent-dark); color: var(--bg); }
.dl-fab svg { width: 22px; height: 22px; flex-shrink: 0; }
@media (max-width: 768px) {
  .feature-board { grid-template-columns: minmax(0, 1fr); gap: 24px; padding: 32px 24px; }
  .feature-board [role="tablist"] { flex-direction: row; flex-wrap: wrap; gap: 8px; }
  .feature-board [role="tab"] { padding-left: 22px; }
  .feature-fragment { margin-right: -48px; padding: 20px; }
  .feature-notes { gap: 32px; }
  .toc { position: static; }
}
@media (max-width: 640px) {
  .feature-notes { grid-template-columns: minmax(0, 1fr); }
  .feature-fragment .set { align-items: flex-start; flex-wrap: wrap; gap: 12px; }
  .client-card { padding: 24px; }
  .client-card__actions { align-items: stretch; }
  .client-card__actions .btn { flex: 1 1 180px; }
  .callout { padding: 20px; }
  .article-download { padding: 24px; }
  .dl-fab { right: 16px; bottom: max(16px, env(safe-area-inset-bottom)); }
  .faq-item summary { font-size: 16px; }
}