.page-features-advanced {
  --adv-node-size: 42px;
  --adv-layer-base: color-mix(in srgb, var(--color-contrast-accent) 82%, transparent);
  --adv-layer-mid: color-mix(in srgb, var(--color-contrast-accent) 50%, transparent);
  --adv-layer-top: color-mix(in srgb, var(--color-contrast-accent) 24%, transparent);
  --adv-glass: color-mix(in srgb, var(--color-surface) 74%, transparent);
  --adv-glass-line: color-mix(in srgb, var(--color-line) 72%, transparent);
  --adv-inner-line: color-mix(in srgb, var(--color-line) 55%, transparent);
}

.page-features-advanced .breadcrumbs {
  padding-block: var(--space-4) 0;
}

.page-features-advanced > .section {
  padding-block: var(--section-y);
}

/* ---------- 首屏定位说明 ---------- */

.page-features-advanced .adv-intro__grid {
  display: grid;
  gap: var(--space-6);
  align-items: start;
}

.page-features-advanced .adv-intro__body {
  display: grid;
  gap: var(--space-3);
  align-content: start;
}

.page-features-advanced .adv-intro__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  max-width: 24ch;
}

.page-features-advanced .adv-intro__lede {
  margin: 0;
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--color-ink);
  max-width: var(--measure);
}

.page-features-advanced .adv-intro__text {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: 62ch;
}

.page-features-advanced .adv-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin: var(--space-2) 0 0;
}

.page-features-advanced .adv-facts__item {
  display: grid;
  gap: 2px;
  padding-inline-start: var(--space-2);
  border-inline-start: 3px solid var(--color-primary);
}

.page-features-advanced .adv-facts__key {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-facts__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--color-primary);
}

.page-features-advanced .media-frame {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
}

.page-features-advanced .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-features-advanced .media-frame__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}

/* ---------- 能力细节：技能树式步骤 ---------- */

.page-features-advanced .adv-detail .section-head {
  margin-bottom: var(--space-6);
}

.page-features-advanced .adv-detail__media {
  margin-bottom: var(--space-6);
}

.page-features-advanced .adv-tree {
  display: grid;
  gap: var(--space-4);
}

.page-features-advanced .adv-tree__rail {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  padding-bottom: var(--space-2);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-features-advanced .adv-node {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex: 0 0 auto;
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-2);
  border: var(--border-thin) solid var(--adv-glass-line);
  border-radius: var(--radius-pill);
  background: var(--adv-glass);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.page-features-advanced .adv-node__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--adv-node-size);
  height: var(--adv-node-size);
  flex: 0 0 var(--adv-node-size);
  border-radius: var(--radius-pill);
  border: 2px solid var(--color-line);
  background: var(--color-surface);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-node[aria-selected="true"] {
  border-color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary-soft) 82%, transparent);
}

.page-features-advanced .adv-node[aria-selected="true"] .adv-node__num {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-features-advanced .adv-tree__panels {
  display: grid;
  gap: var(--space-3);
}

.page-features-advanced .adv-panel {
  padding: var(--space-4);
  border: var(--border-thin) solid var(--adv-glass-line);
}

.page-features-advanced .adv-panel__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-features-advanced .adv-panel__list {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-features-advanced .adv-panel__list li {
  position: relative;
  padding-inline-start: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-features-advanced .adv-panel__list li::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0.85em;
  width: 10px;
  height: 2px;
  background: var(--color-accent);
}

.page-features-advanced .adv-panel__list strong {
  display: block;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
}

.page-features-advanced .adv-read {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-features-advanced .adv-read__sample {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: var(--border-thin) solid var(--adv-inner-line);
}

.page-features-advanced .adv-read__sample--light {
  background: var(--color-surface);
}

.page-features-advanced .adv-read__sample--dark {
  background: var(--color-contrast-surface);
}

.page-features-advanced .adv-read__bar {
  display: block;
  width: 42%;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
}

.page-features-advanced .adv-read__line {
  display: block;
  height: 6px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-deep);
}

.page-features-advanced .adv-read__sample--dark .adv-read__line {
  background: var(--color-contrast-line);
}

.page-features-advanced .adv-read__line--short {
  width: 62%;
}

/* ---------- 全宽深色带：离线包结构 ---------- */

.page-features-advanced .adv-band {
  padding-block: var(--section-y);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-block-start: 3px solid var(--color-primary);
  border-block-end: var(--border-thin) solid var(--color-contrast-line);
}

.page-features-advanced .adv-band__inner {
  display: grid;
  gap: var(--space-6);
}

.page-features-advanced .adv-band__kicker {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-contrast-accent);
}

.page-features-advanced .adv-band__title {
  margin: var(--space-2) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
  max-width: 26ch;
}

.page-features-advanced .adv-band__lede {
  margin: var(--space-2) 0 0;
  max-width: 58ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 76%, transparent);
}

.page-features-advanced .adv-band__grid {
  display: grid;
  gap: var(--space-4);
  align-items: center;
}

.page-features-advanced .adv-stack {
  display: block;
  width: 100%;
  height: auto;
  max-width: 560px;
}

.page-features-advanced .adv-stack rect {
  stroke: var(--color-contrast-accent);
  stroke-opacity: 0.5;
  stroke-width: 1;
}

.page-features-advanced .adv-stack__top {
  fill: var(--adv-layer-top);
}

.page-features-advanced .adv-stack__mid {
  fill: var(--adv-layer-mid);
}

.page-features-advanced .adv-stack__base {
  fill: var(--adv-layer-base);
}

.page-features-advanced .adv-band__layers {
  display: grid;
  gap: var(--space-2);
}

.page-features-advanced .adv-band .acc-item {
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-contrast-ink) 6%, transparent);
  overflow: hidden;
}

.page-features-advanced .adv-band .acc-trigger {
  padding: var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-ink);
  cursor: pointer;
  list-style: none;
}

.page-features-advanced .adv-band .acc-trigger::-webkit-details-marker {
  display: none;
}

.page-features-advanced .adv-band .acc-panel {
  padding: 0 var(--space-3) var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent);
}

/* ---------- 适用条件 ---------- */

.page-features-advanced .adv-cond .section-head {
  margin-bottom: var(--space-6);
}

.page-features-advanced .adv-cond__list {
  display: grid;
  gap: var(--space-2);
}

.page-features-advanced .adv-cond__list .acc-item {
  border: var(--border-thin) solid var(--adv-glass-line);
  border-radius: var(--radius-md);
  background: var(--adv-glass);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.page-features-advanced .adv-cond__list .acc-trigger {
  padding: var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  cursor: pointer;
  list-style: none;
}

.page-features-advanced .adv-cond__list .acc-trigger::-webkit-details-marker {
  display: none;
}

.page-features-advanced .adv-cond__list .acc-panel {
  padding: 0 var(--space-3) var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 与基础能力的差异 ---------- */

.page-features-advanced .adv-diff .section-head {
  margin-bottom: var(--space-6);
}

.page-features-advanced .adv-diff__wrap {
  overflow-x: auto;
  border: var(--border-thin) solid var(--adv-glass-line);
}

.page-features-advanced .adv-diff__table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: var(--text-base);
  color: var(--color-ink);
}

.page-features-advanced .adv-diff__table th,
.page-features-advanced .adv-diff__table td {
  padding: var(--space-3);
  text-align: start;
  vertical-align: top;
  border-block-end: var(--border-thin) solid var(--adv-inner-line);
}

.page-features-advanced .adv-diff__table tbody th {
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  white-space: nowrap;
}

.page-features-advanced .adv-diff__table tbody td {
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-diff__table tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--color-surface-alt) 60%, transparent);
}

.page-features-advanced .adv-diff__table thead th {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
  background: color-mix(in srgb, var(--color-primary-soft) 62%, transparent);
}

.page-features-advanced .adv-diff__table tbody tr:last-child th,
.page-features-advanced .adv-diff__table tbody tr:last-child td {
  border-block-end: 0;
}

/* ---------- 口径一致性 ---------- */

.page-features-advanced .adv-align__grid {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}

.page-features-advanced .adv-align__body {
  display: grid;
  gap: var(--space-3);
  align-content: start;
}

.page-features-advanced .adv-align__body .prose {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-features-advanced .adv-align__checks {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-features-advanced .adv-align__checks li {
  padding-inline-start: var(--space-3);
  border-inline-start: 2px solid var(--color-highlight);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-align__note {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-align__note a {
  color: var(--color-primary);
  text-underline-offset: 3px;
}

/* ---------- 相邻能力入口 ---------- */

.page-features-advanced .adv-next .section-head {
  margin-bottom: var(--space-6);
}

.page-features-advanced .adv-next__grid {
  display: grid;
  gap: var(--space-3);
}

.page-features-advanced .adv-next__card {
  display: grid;
  gap: var(--space-1);
  align-content: start;
  padding: var(--space-4);
  text-decoration: none;
  color: inherit;
  border: var(--border-thin) solid var(--adv-glass-line);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.page-features-advanced .adv-next__card:hover,
.page-features-advanced .adv-next__card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-2);
}

.page-features-advanced .adv-next__idx {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-accent);
}

.page-features-advanced .adv-next__name {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-features-advanced .adv-next__desc {
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* ---------- 焦点与响应式 ---------- */

.page-features-advanced :focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

@media (min-width: 680px) {
  .page-features-advanced .adv-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-features-advanced .adv-cond__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
  }

  .page-features-advanced .adv-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-features-advanced .adv-intro__title {
    font-size: var(--text-4xl);
  }

  .page-features-advanced .adv-intro__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: var(--space-8);
  }

  .page-features-advanced .adv-tree {
    grid-template-columns: minmax(0, 290px) minmax(0, 1fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-features-advanced .adv-tree__rail {
    position: relative;
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-features-advanced .adv-tree__rail::before {
    content: "";
    position: absolute;
    inset-inline-start: calc(var(--adv-node-size) / 2);
    inset-block-start: calc(var(--adv-node-size) / 2);
    inset-block-end: calc(var(--adv-node-size) / 2);
    width: 2px;
    background: linear-gradient(180deg, var(--color-line), var(--color-highlight));
  }

  .page-features-advanced .adv-node {
    position: relative;
    width: 100%;
    padding: var(--space-3) var(--space-2) var(--space-3) 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    align-items: flex-start;
    font-size: var(--text-base);
  }

  .page-features-advanced .adv-node__num {
    position: relative;
    z-index: 1;
  }

  .page-features-advanced .adv-node__text {
    padding-block-start: calc((var(--adv-node-size) - 1.2em) / 2);
    color: var(--color-ink-soft);
  }

  .page-features-advanced .adv-node[aria-selected="true"] {
    background: transparent;
  }

  .page-features-advanced .adv-node[aria-selected="true"] .adv-node__text {
    color: var(--color-primary);
    font-weight: var(--weight-heading);
  }

  .page-features-advanced .adv-panel {
    padding: var(--space-6);
  }

  .page-features-advanced .adv-band__grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    gap: var(--space-8);
  }

  .page-features-advanced .adv-align__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: var(--space-8);
  }
}

@media (min-width: 1100px) {
  .page-features-advanced .adv-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-features-advanced * {
    animation: none;
    transition: none;
  }

  .page-features-advanced .adv-next__card:hover,
  .page-features-advanced .adv-next__card:focus-visible {
    transform: none;
  }
}