/* 能力分段条：组件无脚本时仍保留首个面板。 */
.tabs { min-width: 0; }
.tabs [role="tablist"] {
  display: flex; align-items: center; gap: 4px; width: max-content; max-width: 100%;
  margin: 0 auto 28px; padding: 6px;
  overflow-x: auto; overscroll-behavior-x: contain;
  border: 1px solid var(--c-border); border-radius: var(--r-pill);
  background: var(--c-panel); color: var(--c-text);
}
.tabs [role="tab"] {
  flex-shrink: 0; min-height: 44px; padding: 10px 20px;
  border: 0; border-radius: var(--r-pill); background: var(--c-panel); color: var(--c-muted);
  font-size: var(--fs-label); white-space: nowrap;
}
.tabs [role="tab"][aria-selected="true"] { background: var(--c-accent); color: var(--c-white); }
.tabs [role="tab"]:hover:not([aria-selected="true"]) { background: var(--c-accent-tint); color: var(--c-accent-dark); }
.tab-panel {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center; gap: 56px; padding: 48px;
  border: 1px solid var(--c-border); border-radius: var(--r-panel);
  background: var(--c-panel); color: var(--c-text);
}
.tab-panel h3 { margin-top: 0; }
.tab-panel p { color: var(--c-muted); }
.tab-panel__visual { min-width: 0; padding: 24px; border-radius: var(--r-inner); background: var(--c-white); color: var(--c-text); }
.tab-panel__visual .settings__group { border: 0; padding-left: 0; }
.tab-panel__visual pre { margin: 0; }
.tab-panel__protocols { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; padding: 0; list-style: none; }
.tab-panel__protocols li { padding: 8px 14px; border-radius: var(--r-pill); background: var(--c-panel); color: var(--c-text); font-family: var(--f-mono); font-size: var(--fs-small); }

.toc {
  position: sticky; top: 12px; z-index: 10;
  display: flex; flex-wrap: wrap; gap: 8px; margin-block: 24px; padding: 12px;
  border: 1px solid var(--c-border); border-radius: var(--r-inner);
  background: var(--c-white); color: var(--c-text);
}
.toc a { display: block; min-height: 44px; padding: 10px 14px; border-radius: var(--r-small); color: var(--c-muted); text-decoration: none; font-size: var(--fs-label); }
.toc a:hover, .toc a[aria-current="location"] { background: var(--c-accent-tint); color: var(--c-accent-dark); }
.toc--static { position: static; }

.faq-list { border-top: 1px solid var(--c-border); }
.faq-item { border-bottom: 1px solid var(--c-border); background: var(--c-white); color: var(--c-text); }
.faq-item summary { position: relative; min-height: 64px; padding: 20px 36px 20px 0; cursor: pointer; list-style: none; font-weight: var(--weight-title); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 8px; top: 18px; color: var(--c-accent); font-family: var(--f-mono); font-size: var(--fs-card); }
.faq-item[open] summary::after { content: "−"; }
.faq-item__answer { padding-right: 28px; padding-bottom: 20px; color: var(--c-muted); }
.faq-item__answer p:last-child { margin-bottom: 0; }

.term-card { padding: 28px; border: 1px solid var(--c-border); border-radius: var(--r-inner); background: var(--c-white); color: var(--c-text); }
.term-card h3 { margin: 0 0 12px; font-size: var(--fs-card); }
.term-card p { margin-bottom: 16px; color: var(--c-muted); }
.term-card__category { display: inline-block; margin-bottom: 16px; color: var(--c-accent-dark); font-size: var(--fs-small); }
.term-card code { font-size: var(--fs-small); }

.app-store-button {
  display: inline-flex; align-items: center; justify-content: center; gap: 12px;
  min-height: 58px; max-width: 100%; padding: 11px 24px;
  border: 1px solid var(--c-accent); border-radius: var(--r-btn);
  background: var(--c-accent); color: var(--c-white);
  text-decoration: none; line-height: 1.25;
  transition: background-color var(--time-ui), transform var(--time-ui);
}
.app-store-button:hover { background: var(--c-accent-dark); color: var(--c-white); transform: translateY(-1px); }
.app-store-button svg { width: 27px; height: 30px; flex-shrink: 0; fill: currentColor; }
.app-store-button__copy { display: block; min-width: 0; }
.app-store-button__copy small { display: block; font-size: var(--fs-caption); }
.app-store-button__copy strong { display: block; margin-top: 3px; font-size: var(--fs-lead); font-weight: var(--weight-title); }

.facts { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px; margin: 0; padding: 0; list-style: none; }
.fact { display: inline-flex; align-items: center; gap: 7px; max-width: 100%; padding: 7px 12px; border: 1px solid var(--c-border); border-radius: var(--r-pill); background: var(--c-panel); color: var(--c-muted); font-size: var(--fs-small); line-height: 1.4; overflow-wrap: anywhere; }
.fact svg, .fact__dot { flex-shrink: 0; }
.facts--start { justify-content: flex-start; }

.official-shot { width: 100%; max-width: 280px; min-width: 0; flex-shrink: 0; margin: 0 auto; padding: 0; }
.official-shot img { display: block; width: 100%; height: auto; border-radius: var(--r-shot); }
.official-shot img { outline: 1px solid var(--c-border); outline-offset: -1px; }
.official-shot figcaption { margin-top: 12px; color: var(--c-muted); font-size: var(--fs-small); line-height: 1.6; }
.shot-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; align-items: start; gap: 48px; }

.device-card { display: flex; flex-direction: column; align-items: flex-start; padding: 32px; border: 1px solid var(--c-border); border-radius: var(--r-card); background: var(--c-panel); color: var(--c-text); }
.device-card__icon { width: 48px; height: 56px; color: var(--c-accent); }
.device-card h3 { margin-top: 24px; margin-bottom: 12px; }
.device-card p { color: var(--c-muted); }
.device-card > a { margin-top: auto; }

.article-card { display: flex; flex-direction: column; padding: 28px; border: 1px solid var(--c-border); border-radius: var(--r-card); background: var(--c-white); color: var(--c-text); }
.article-card__meta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 18px; color: var(--c-muted); font-size: var(--fs-small); }
.article-card h3 { margin-top: 0; margin-bottom: 16px; font-size: var(--fs-card); line-height: 1.45; }
.article-card h3 a { color: var(--c-text); text-decoration: none; }
.article-card h3 a:hover { color: var(--c-accent-dark); }
.article-card p { color: var(--c-muted); }
.article-card__link { margin-top: auto; }

.callout { margin: 28px 0; padding: 24px; border: 1px solid var(--c-border); border-left: 3px solid var(--c-accent); border-radius: var(--r-group); background: var(--c-panel); color: var(--c-text); }
.callout p:last-child { margin-bottom: 0; }
.callout--warn { border-left-color: var(--c-warn); }
.callout--error { border-left-color: var(--c-error); }
.callout--success { border-left-color: var(--c-success); }
.callout__label { display: block; margin-bottom: 8px; color: var(--c-text); font-weight: var(--weight-strong); }

.table-scroll { max-width: 100%; min-width: 0; overflow-x: auto; overscroll-behavior-x: contain; -webkit-overflow-scrolling: touch; border: 1px solid var(--c-border); border-radius: var(--r-group); }
.data-table { width: 100%; border-collapse: collapse; text-align: left; background: var(--c-white); color: var(--c-text); }
.data-table :where(th, td), .prose table :where(th, td), .article-body table :where(th, td) { min-width: 7em; padding: 16px; border-bottom: 1px solid var(--c-border); overflow-wrap: normal; word-break: normal; vertical-align: top; }
.data-table th, .prose table th, .article-body table th { background: var(--c-panel); color: var(--c-text); font-weight: var(--weight-strong); }
.data-table tr:last-child td { border-bottom: 0; }
.prose table, .article-body table { display: block; max-width: 100%; min-width: 0; overflow-x: auto; -webkit-overflow-scrolling: touch; border-collapse: collapse; text-align: left; }
.prose table code, .article-body table code, .data-table code { overflow-wrap: anywhere; }

.dl-fab { position: fixed; right: max(20px, env(safe-area-inset-right)); bottom: max(20px, env(safe-area-inset-bottom)); z-index: var(--layer-fab); display: inline-flex; align-items: center; gap: 12px; max-width: calc(100% - 40px); min-height: 56px; padding: 12px 18px; border: 1px solid var(--c-line-dark); border-radius: var(--r-inner); background: var(--c-accent); color: var(--c-white); text-decoration: none; font-size: var(--fs-label); }
.dl-fab:hover { background: var(--c-accent-dark); color: var(--c-white); }
.dl-fab svg { width: 22px; height: 22px; flex-shrink: 0; }
.article-store-note { margin-top: 48px; padding: 28px; border: 1px solid var(--c-border); border-radius: var(--r-inner); background: var(--c-panel); color: var(--c-text); }
.article-store-note h2 { margin-top: 0; font-size: var(--fs-card); }
.article-store-note p { color: var(--c-muted); }

@media (max-width: 768px) {
  .tab-panel { grid-template-columns: minmax(0, 1fr); gap: 28px; padding: 28px; }
  .tabs [role="tablist"] { justify-content: flex-start; width: 100%; }
  .tabs [role="tab"] { padding-inline: 16px; }
  .shot-layout { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .official-shot { margin-inline: auto; }
}
@media (max-width: 640px) {
  .tab-panel { padding: 24px 20px; }
  .tab-panel__visual { padding: 18px; }
  .facts { flex-direction: row; flex-wrap: wrap; gap: 7px; }
  .fact { padding: 6px 10px; font-size: var(--fs-caption); }
  .toc { position: static; flex-wrap: nowrap; overflow-x: auto; overscroll-behavior-x: contain; }
  .toc a { flex-shrink: 0; white-space: nowrap; }
  .device-card, .term-card, .article-card { padding: 24px 20px; }
  .callout { padding: 20px; }
  .dl-fab { right: 16px; bottom: max(16px, env(safe-area-inset-bottom)); max-width: calc(100% - 32px); }
  .article-store-note { padding: 24px 20px; }
}