.page-features-advanced {
  --adv-track-gutter: 36px;
  --adv-line-x: 5px;
  --adv-dot: 12px;
  background-color: var(--color-surface);
}

.page-features-advanced .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin: 0 0 var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-features-advanced .breadcrumb a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: 1px dotted var(--color-line);
}

.page-features-advanced .breadcrumb a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.page-features-advanced .adv-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-label::before {
  content: "";
  flex: none;
  width: var(--space-3);
  height: 2px;
  background-color: var(--color-primary);
}

.page-features-advanced .adv-label--invert {
  color: var(--color-contrast-ink);
}

.page-features-advanced .adv-label--invert::before {
  background-color: var(--color-contrast-accent);
}

/* 首屏 */
.page-features-advanced .adv-hero {
  padding-top: var(--space-8);
  padding-bottom: var(--space-6);
}

.page-features-advanced .adv-hero h1 {
  margin: 0 0 var(--space-3);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  max-width: 24ch;
}

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

/* 通用标题与段落 */
.page-features-advanced .adv-opening__text h2,
.page-features-advanced .adv-axes__head h2,
.page-features-advanced .adv-merge__head h2,
.page-features-advanced .adv-next h2 {
  margin: 0 0 var(--space-3);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-features-advanced .adv-opening__text p,
.page-features-advanced .adv-axes__head p,
.page-features-advanced .adv-merge__head p {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-features-advanced .adv-opening__text p:last-of-type {
  margin-bottom: 0;
}

/* 定位区 */
.page-features-advanced .adv-opening {
  padding-bottom: var(--space-8);
}

.page-features-advanced .adv-opening__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-features-advanced .adv-duo {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
}

.page-features-advanced .adv-duo__item {
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
}

.page-features-advanced .adv-duo__item h3 {
  margin: var(--space-2) 0 var(--space-2);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-features-advanced .adv-duo__k {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--space-4);
  height: var(--space-3);
  padding: 0 var(--space-1);
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}

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

/* 图片框 */
.page-features-advanced .adv-figure {
  margin: 0;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-surface-alt);
}

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

.page-features-advanced .adv-figure figcaption {
  padding: var(--space-2) var(--space-3);
  border-top: 1px dotted var(--color-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

/* 两条轴线 */
.page-features-advanced .adv-axes {
  border-top: 1px dotted var(--color-line);
  border-bottom: 1px dotted var(--color-line);
}

.page-features-advanced .adv-axes__head {
  margin-bottom: var(--space-8);
}

.page-features-advanced .adv-axes__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8);
}

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

.page-features-advanced .adv-axis__head {
  margin-bottom: var(--space-6);
  padding-top: var(--space-2);
  border-top: 2px solid var(--color-primary);
}

.page-features-advanced .adv-axis__tag {
  display: inline-block;
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-primary);
}

.page-features-advanced .adv-axis__head h3 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

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

.page-features-advanced .adv-track {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--adv-track-gutter);
}

.page-features-advanced .adv-track::before {
  content: "";
  position: absolute;
  left: var(--adv-line-x);
  top: var(--space-2);
  bottom: var(--space-2);
  width: 1px;
  background-color: var(--color-line);
}

.page-features-advanced .adv-node {
  position: relative;
  padding-bottom: var(--space-6);
}

.page-features-advanced .adv-track > .adv-node:last-child {
  padding-bottom: 0;
}

.page-features-advanced .adv-node__dot {
  position: absolute;
  top: 5px;
  left: calc(-1 * var(--adv-track-gutter));
  width: var(--adv-dot);
  height: var(--adv-dot);
  border: 1px solid var(--color-primary);
  border-radius: 50%;
  background-color: var(--color-surface-alt);
  transition: transform 140ms ease, box-shadow 140ms ease, background-color 140ms ease;
}

.page-features-advanced .adv-node__dot--square {
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
}

.page-features-advanced .adv-node__dot--accent {
  border-color: var(--color-accent);
  background-color: var(--color-accent);
}

.page-features-advanced .adv-node:hover .adv-node__dot,
.page-features-advanced .adv-node:focus-within .adv-node__dot {
  transform: scale(1.35);
  box-shadow: 0 0 0 4px var(--color-primary-soft);
}

.page-features-advanced .adv-node:hover .adv-node__dot--accent,
.page-features-advanced .adv-node:focus-within .adv-node__dot--accent {
  box-shadow: 0 0 0 4px var(--color-highlight);
}

.page-features-advanced .adv-node__field {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-node__title {
  margin: 0 0 var(--space-1);
  font-size: var(--text-base);
  line-height: var(--leading-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-features-advanced .adv-node__desc {
  margin: 0 0 var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-node__src {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* 追溯路径 */
.page-features-advanced .adv-trace {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin: 0 0 var(--space-2);
  padding: var(--space-2);
  border: 1px dotted var(--color-line);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
}

.page-features-advanced .adv-trace__step {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink);
  padding: 2px var(--space-1);
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-soft);
}

.page-features-advanced .adv-trace__sep {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
}

/* 折叠字段清单 */
.page-features-advanced .adv-more {
  margin-top: var(--space-6);
}

.page-features-advanced .adv-more__btn {
  display: block;
  width: 100%;
  padding: var(--space-3);
  border: 1px dotted var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-align: left;
  cursor: pointer;
}

.page-features-advanced .adv-more__btn:hover {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
}

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

.page-features-advanced .adv-more__panel {
  margin-top: var(--space-2);
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
}

.page-features-advanced .adv-fields {
  margin: 0;
}

.page-features-advanced .adv-fields__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1);
  padding: var(--space-2) 0;
  border-top: 1px dotted var(--color-line);
}

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

.page-features-advanced .adv-fields dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-fields dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

/* 强对比收束区 */
.page-features-advanced .adv-merge {
  background-color: var(--color-contrast-surface);
}

.page-features-advanced .adv-merge h2,
.page-features-advanced .adv-merge h3,
.page-features-advanced .adv-merge p {
  color: var(--color-contrast-ink);
}

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

.page-features-advanced .adv-merge__media {
  margin: 0 0 var(--space-6);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  line-height: 0;
}

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

.page-features-advanced .adv-cond {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-features-advanced .adv-cond__item {
  display: grid;
  grid-template-columns: var(--space-6) minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-3) 0;
  border-top: 1px dotted var(--color-contrast-line);
}

.page-features-advanced .adv-cond__item:last-child {
  border-bottom: 1px dotted var(--color-contrast-line);
}

.page-features-advanced .adv-cond__mark {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
  padding-top: 4px;
}

.page-features-advanced .adv-cond__title {
  margin: 0 0 var(--space-1);
  font-size: var(--text-base);
  line-height: var(--leading-heading);
  font-weight: var(--weight-heading);
}

.page-features-advanced .adv-cond__text {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  opacity: 0.82;
}

/* 相邻主题入口 */
.page-features-advanced .adv-next {
  padding-bottom: var(--space-8);
}

.page-features-advanced .adv-next__list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  max-width: 800px;
  border-top: 1px dotted var(--color-line);
}

.page-features-advanced .adv-next__item {
  border-bottom: 1px dotted var(--color-line);
}

.page-features-advanced .adv-next__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-3) var(--space-2);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  transition: background-color 140ms ease;
}

.page-features-advanced .adv-next__link:hover {
  background-color: var(--color-primary-soft);
}

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

.page-features-advanced .adv-next__num {
  color: var(--color-primary);
  font-family: var(--font-mono);
  line-height: 1;
}

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

.page-features-advanced .adv-next__title {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

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

@media (min-width: 640px) {
  .page-features-advanced .adv-duo {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-features-advanced .adv-fields__row {
    grid-template-columns: 130px minmax(0, 1fr);
    gap: var(--space-3);
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-features-advanced .adv-opening__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-features-advanced .adv-axes__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--space-8);
  }
}

@media (min-width: 1024px) {
  .page-features-advanced .adv-hero {
    padding-top: var(--section-y);
  }

  .page-features-advanced .adv-next__link {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
}
<<<END>>>