.page-features-advanced {
  --adv-scroll-offset: 96px;
}

/* 面包屑 */
.page-features-advanced .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-2);
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.page-features-advanced .breadcrumb a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
}
.page-features-advanced .breadcrumb a:hover,
.page-features-advanced .breadcrumb a:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.page-features-advanced .breadcrumb [aria-current="page"] {
  color: var(--color-ink);
}

/* 首屏 */
.page-features-advanced .adv-masthead-grid {
  display: grid;
  gap: var(--space-6);
}
.page-features-advanced .adv-masthead-main {
  min-width: 0;
}
.page-features-advanced .adv-masthead h1 {
  margin: var(--space-2) 0 var(--space-3);
  max-width: 22ch;
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}
.page-features-advanced .adv-masthead .lead {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-lg);
  color: var(--color-ink-soft);
}
.page-features-advanced .adv-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-2);
  margin-top: var(--space-3);
}

/* 本页索引 */
.page-features-advanced .adv-index {
  padding: var(--space-3) var(--space-3) var(--space-2);
  background: var(--color-surface-alt);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}
.page-features-advanced .adv-index-title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}
.page-features-advanced .adv-index ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-features-advanced .adv-index li + li {
  border-top: var(--border-thin) solid var(--color-line);
}
.page-features-advanced .adv-index a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2);
  align-items: baseline;
  padding: var(--space-2) 0;
  color: var(--color-ink);
  font-size: var(--text-sm);
  text-decoration: none;
}
.page-features-advanced .adv-index a:hover,
.page-features-advanced .adv-index a:focus-visible {
  color: var(--color-accent);
}
.page-features-advanced .adv-index .mono-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
}

/* 边界说明 */
.page-features-advanced .adv-boundary-grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}
.page-features-advanced .adv-boundary-card {
  padding: var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}
.page-features-advanced .adv-boundary-card h3 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xl);
}
.page-features-advanced .adv-boundary-card p {
  margin: 0;
  color: var(--color-ink-soft);
}
.page-features-advanced .adv-boundary-card--soft {
  background: var(--color-primary-soft);
  box-shadow: none;
}
.page-features-advanced .adv-boundary-card--soft p {
  color: var(--color-ink);
}

/* 筛选与分组 */
.page-features-advanced .adv-zone-head {
  margin-bottom: var(--space-6);
}
.page-features-advanced .adv-filter-label {
  max-width: var(--measure);
  margin: var(--space-2) 0 var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.page-features-advanced .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-2);
}
.page-features-advanced .filter-btn {
  padding: var(--space-1) var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface-alt);
  color: var(--color-ink-soft);
  font: inherit;
  font-size: var(--text-sm);
  cursor: pointer;
}
.page-features-advanced .filter-btn[aria-pressed="true"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}
.page-features-advanced .filter-btn:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}
.page-features-advanced .filter-empty {
  margin: var(--space-4) 0 0;
  padding: var(--space-4);
  background: var(--color-primary-soft);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-ink);
}
.page-features-advanced .filter-empty[hidden] {
  display: none;
}

.page-features-advanced .adv-group {
  padding: var(--space-4);
  margin-bottom: var(--space-6);
  border-radius: var(--radius-lg);
}
.page-features-advanced .adv-group--a {
  background: var(--color-surface-alt);
  box-shadow: var(--shadow-1);
}
.page-features-advanced .adv-group--b {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  box-shadow: var(--shadow-2);
}
.page-features-advanced .adv-group-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-primary);
}
.page-features-advanced .adv-group--b .adv-group-head {
  border-bottom-color: var(--color-contrast-accent);
}
.page-features-advanced .adv-group-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}
.page-features-advanced .adv-group-title > div {
  min-width: 0;
}
.page-features-advanced .adv-group h2 {
  margin: 0;
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
}
.page-features-advanced .adv-group--b h2 {
  color: var(--color-contrast-ink);
}
.page-features-advanced .adv-group--b .eyebrow {
  color: var(--color-contrast-accent);
}
.page-features-advanced .adv-ruler {
  display: inline-block;
  flex: none;
  width: 56px;
  height: 9px;
  border-bottom: 1px solid var(--color-primary);
  background-image: repeating-linear-gradient(
    90deg,
    var(--color-primary) 0 2px,
    transparent 2px 8px
  );
}
.page-features-advanced .adv-ruler--on-dark {
  border-bottom-color: var(--color-contrast-accent);
  background-image: repeating-linear-gradient(
    90deg,
    var(--color-contrast-accent) 0 2px,
    transparent 2px 8px
  );
}

/* 能力条目 */
.page-features-advanced .adv-item {
  padding: var(--space-4) 0;
  border-top: var(--border-thin) solid var(--color-line);
}
.page-features-advanced .adv-item:first-of-type {
  padding-top: var(--space-3);
  border-top: 0;
}
.page-features-advanced .adv-group--b .adv-item {
  border-top-color: var(--color-contrast-line);
}
.page-features-advanced .adv-item-main {
  min-width: 0;
}
.page-features-advanced .adv-item--media {
  display: grid;
  gap: var(--space-3);
}
.page-features-advanced .adv-item-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2) var(--space-3);
  align-items: start;
}
.page-features-advanced .adv-index-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}
.page-features-advanced .adv-group--b .adv-index-num {
  background: transparent;
  border: var(--border-thin) solid var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}
.page-features-advanced .adv-item h3 {
  margin: 0 0 var(--space-1);
  font-size: var(--text-lg);
}
.page-features-advanced .adv-item-line {
  margin: 0;
  color: var(--color-ink-soft);
}
.page-features-advanced .adv-group--b .adv-item-line {
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

/* 明细折叠 */
.page-features-advanced .adv-detail {
  margin-top: var(--space-3);
}
.page-features-advanced .adv-detail summary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  color: var(--color-accent);
  font-size: var(--text-sm);
  cursor: pointer;
  list-style: none;
}
.page-features-advanced .adv-detail summary::-webkit-details-marker {
  display: none;
}
.page-features-advanced .adv-detail summary::after {
  content: "+";
  font-family: var(--font-mono);
}
.page-features-advanced .adv-detail[open] summary::after {
  content: "–";
}
.page-features-advanced .adv-detail summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}
.page-features-advanced .adv-group--b .adv-detail summary {
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-accent);
}
.page-features-advanced .adv-detail-grid {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: var(--border-thin) dashed var(--color-line);
}
.page-features-advanced .adv-group--b .adv-detail-grid {
  border-top-color: var(--color-contrast-line);
}
.page-features-advanced .adv-field-label {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}
.page-features-advanced .adv-field p {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}
.page-features-advanced .adv-field p a {
  color: var(--color-accent);
}
.page-features-advanced .adv-group--b .adv-field-label {
  color: var(--color-contrast-accent);
}
.page-features-advanced .adv-group--b .adv-field p {
  color: var(--color-contrast-ink);
}
.page-features-advanced .adv-group--b .adv-field p a {
  color: var(--color-contrast-accent);
}

/* 图 */
.page-features-advanced .adv-figure {
  margin: var(--space-3) 0 0;
}
.page-features-advanced .adv-figure--wide {
  margin: var(--space-5, var(--space-4)) 0 var(--space-2);
}
.page-features-advanced .media-frame {
  overflow: hidden;
  border-radius: var(--radius-lg);
}
.page-features-advanced .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-features-advanced .media-caption {
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.page-features-advanced .adv-group--b .media-caption {
  color: var(--color-contrast-ink);
  opacity: 0.75;
}

/* 前置确认 */
.page-features-advanced .adv-checks {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
}
.page-features-advanced .adv-check {
  padding: var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}
.page-features-advanced .adv-check-num {
  display: inline-block;
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}
.page-features-advanced .adv-check h3 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
}
.page-features-advanced .adv-check p {
  margin: 0;
  color: var(--color-ink-soft);
}

/* 收口 */
.page-features-advanced .adv-exit-grid {
  display: grid;
  gap: var(--space-6);
}
.page-features-advanced .adv-exit-list {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}
.page-features-advanced .adv-exit-list li {
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-primary);
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}
.page-features-advanced .adv-actions {
  padding: var(--space-4);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
}
.page-features-advanced .adv-actions ul {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-features-advanced .adv-actions li {
  display: grid;
  gap: var(--space-1);
  justify-items: start;
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.page-features-advanced .adv-actions li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-features-advanced .adv-action-note {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.page-features-advanced .adv-contact-line {
  margin: var(--space-3) 0 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.page-features-advanced .adv-contact-line a {
  color: var(--color-accent);
}

/* 锚点定位 */
.page-features-advanced #group-devices,
.page-features-advanced #group-time,
.page-features-advanced #precheck {
  scroll-margin-top: var(--adv-scroll-offset);
}

/* 断点 */
@media (min-width: 768px) {
  .page-features-advanced .adv-masthead h1 {
    font-size: var(--text-3xl);
  }
  .page-features-advanced .section-head h2 {
    font-size: var(--text-2xl);
  }
  .page-features-advanced .adv-group {
    padding: var(--space-6);
  }
  .page-features-advanced .adv-group h2 {
    font-size: var(--text-2xl);
  }
  .page-features-advanced .adv-detail-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
  }
  .page-features-advanced .adv-checks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-features-advanced .adv-masthead h1 {
    font-size: var(--text-4xl);
  }
  .page-features-advanced .adv-masthead-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: var(--space-8);
  }
  .page-features-advanced .adv-boundary-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: var(--space-6);
  }
  .page-features-advanced .adv-item--media {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: var(--space-4);
    align-items: start;
  }
  .page-features-advanced .adv-checks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }
  .page-features-advanced .adv-exit-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
    gap: var(--space-8);
  }
}

.page-features-advanced {
  --space-5: var(--space-8);
}