.page-features-advanced {
  --adv-hang: var(--space-3);
}

/* ── 页头 ── */
.page-features-advanced .adv-head {
  padding-top: var(--space-4);
  padding-bottom: var(--space-6);
  border-bottom: var(--border-thin) solid var(--color-line);
}

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

.page-features-advanced .adv-head__lede {
  margin-top: var(--space-3);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.page-features-advanced .adv-head__status {
  margin-top: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

/* ── 主体布局：标签轴 + 内容区 ── */
.page-features-advanced .adv-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  padding-top: var(--space-6);
}

.page-features-advanced .adv-aside {
  border-top: var(--border-thin) solid var(--color-line);
  padding-top: var(--space-2);
}

.page-features-advanced .adv-aside__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-aside__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
}

.page-features-advanced .adv-aside__list .anchors__link {
  display: block;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  padding-bottom: 1px;
}

.page-features-advanced .adv-aside__list .anchors__link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

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

.page-features-advanced .adv-main {
  min-width: 0;
}

/* ── 区块 ── */
.page-features-advanced .adv-section {
  padding-top: var(--space-8);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-features-advanced .adv-main > .adv-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-features-advanced .adv-group__kicker {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-group__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  max-width: var(--measure);
}

.page-features-advanced .adv-prose {
  margin-top: var(--space-3);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-prose p {
  margin: 0 0 var(--space-3);
}

.page-features-advanced .adv-prose p:last-child {
  margin-bottom: 0;
}

.page-features-advanced .adv-prose a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid currentColor;
}

.page-features-advanced .adv-prose a:hover {
  background-color: var(--color-highlight);
}

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

.page-features-advanced .adv-prose a:visited {
  color: var(--color-focus);
}

/* ── 分组导语：说明 + 图 ── */
.page-features-advanced .adv-group__intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

/* ── 步骤序列（等宽记录感） ── */
.page-features-advanced .adv-steps {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: var(--space-3) 0 0;
  border-top: var(--border-thin) solid var(--color-line);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: var(--measure);
}

.page-features-advanced .adv-steps li {
  display: flex;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-steps__no {
  flex: 0 0 auto;
  color: var(--color-accent);
  letter-spacing: 0.08em;
}

/* ── 图片 ── */
.page-features-advanced .adv-figure {
  margin: 0;
}

.page-features-advanced .adv-figure .figure__frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-features-advanced .adv-figure .figure__caption {
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-figure--wide {
  margin-top: var(--space-6);
}

/* ── 扩展能力条目 ── */
.page-features-advanced .adv-item {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-features-advanced .adv-item__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.page-features-advanced .adv-item__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.page-features-advanced .adv-item__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

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

.page-features-advanced .adv-item__desc p {
  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-item__limits {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  padding-left: var(--space-3);
  border-left: var(--border-thin) solid var(--color-line);
}

.page-features-advanced .adv-item__limits-label {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-item__more {
  margin-top: var(--space-3);
  max-width: var(--measure);
}

.page-features-advanced .adv-item__more summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-accent);
  border-bottom: var(--border-thin) solid transparent;
  display: inline-block;
}

.page-features-advanced .adv-item__more summary::-webkit-details-marker {
  display: none;
}

.page-features-advanced .adv-item__more summary::before {
  content: "＋ ";
}

.page-features-advanced .adv-item__more[open] summary::before {
  content: "－ ";
}

.page-features-advanced .adv-item__more summary:hover {
  border-bottom-color: currentColor;
}

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

.page-features-advanced .adv-item__more p {
  margin: var(--space-2) 0 0;
  padding-left: var(--space-3);
  border-left: var(--border-thin) solid var(--color-line);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ── 适用条件 ── */
.page-features-advanced .adv-conditions {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-4);
}

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

.page-features-advanced .adv-condition-col + .adv-condition-col {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-features-advanced .adv-condition-col__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-features-advanced .adv-condition-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.page-features-advanced .adv-condition-list li {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  padding-left: 1.1em;
  text-indent: -1.1em;
}

.page-features-advanced .adv-condition-list li::before {
  content: "—";
  color: var(--color-ink-muted);
  margin-right: 0.35em;
}

/* ── 相邻主题 ── */
.page-features-advanced .adj-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2) var(--space-4);
  margin-top: var(--space-4);
  padding: var(--space-3) 0;
  border-top: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features-advanced .adj-nav__link {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
}

.page-features-advanced .adj-nav__link:hover {
  border-bottom-color: currentColor;
  background-color: var(--color-highlight);
}

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

.page-features-advanced .adj-nav__link:visited {
  color: var(--color-focus);
}

.page-features-advanced .adj-nav__link--here {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  border-bottom-color: var(--color-line);
}

/* ── 断点 ── */
@media (min-width: 700px) {
  .page-features-advanced .adv-item__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: var(--space-6);
  }
}

@media (min-width: 861px) {
  .page-features-advanced .adv-head {
    padding-top: var(--space-6);
    padding-bottom: var(--space-8);
  }

  .page-features-advanced .adv-layout {
    grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
    gap: var(--space-8);
    padding-top: var(--space-8);
  }

  .page-features-advanced .adv-aside {
    position: sticky;
    top: var(--space-8);
    align-self: start;
  }

  .page-features-advanced .adv-aside__list {
    flex-direction: column;
    gap: var(--space-1);
  }

  .page-features-advanced .adv-aside__list .anchors__link {
    border-left: var(--border-thin) solid var(--color-line);
    border-bottom: 0;
    padding-left: var(--space-2);
    padding-bottom: 0;
  }

  .page-features-advanced .adv-aside__list .anchors__link:hover {
    border-left-color: var(--color-accent);
    border-bottom-color: transparent;
  }

  .page-features-advanced .adv-group__intro {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-features-advanced .adv-conditions {
    grid-template-columns: minmax(0, 5fr) minmax(0, 2fr);
    gap: var(--space-4);
  }

  .page-features-advanced .adv-section {
    padding-top: var(--section-y);
  }

  .page-features-advanced .adv-item {
    margin-top: var(--space-8);
  }
}
<<<END>>>