.page-features-advanced {
  --adv-narrow: 44rem;
  --adv-hair: 1px;
}

/* ---------- 面包屑 ---------- */
.page-features-advanced .adv-crumb {
  padding-top: var(--space-4);
  padding-bottom: 0;
}

/* ---------- 主题声明 ---------- */
.page-features-advanced .adv-intro {
  padding-top: var(--space-6);
}

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

@media (min-width: 960px) {
  .page-features-advanced .adv-intro-shell {
    grid-template-columns: minmax(0, 1.16fr) minmax(0, 0.84fr);
    gap: var(--space-8);
  }
}

.page-features-advanced .adv-intro-main {
  max-width: var(--adv-narrow);
}

.page-features-advanced .adv-intro-main h1 {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-features-advanced .adv-intro-main p {
  margin: 0 0 var(--space-3);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-features-advanced .adv-intro-main .lede {
  color: var(--color-ink);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
}

.page-features-advanced .adv-intro-main a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--adv-hair) solid color-mix(in srgb, var(--color-accent) 45%, transparent);
}

.page-features-advanced .adv-intro-main a:hover,
.page-features-advanced .adv-intro-main a:focus-visible {
  border-bottom-color: var(--color-accent);
}

.page-features-advanced .adv-scope {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--adv-hair);
  margin-top: var(--space-4);
  border: var(--adv-hair) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-line);
  overflow: hidden;
}

@media (min-width: 620px) {
  .page-features-advanced .adv-scope {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-features-advanced .adv-scope-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-alt);
}

.page-features-advanced .adv-scope-item .metric-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-scope-item strong {
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  line-height: 1.5;
}

/* ---------- 侧边 ---------- */
.page-features-advanced .adv-side {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.page-features-advanced .adv-figure {
  margin: 0;
  border: var(--adv-hair) solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

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

.page-features-advanced .adv-notes {
  border-top: var(--adv-hair) solid var(--color-line);
}

.page-features-advanced .adv-note {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: var(--adv-hair) solid var(--color-line);
  outline: none;
  transition: background-color 0.25s ease;
}

.page-features-advanced .adv-note:hover,
.page-features-advanced .adv-note:focus-within {
  background: color-mix(in srgb, var(--color-primary) 12%, transparent);
}

.page-features-advanced .adv-note-label {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-note-value {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-accent);
}

.page-features-advanced .adv-note-detail {
  grid-column: 1 / -1;
  max-height: 0;
  margin-top: 0;
  overflow: hidden;
  opacity: 0;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-muted);
  transition: max-height 0.3s ease, opacity 0.3s ease, margin-top 0.3s ease;
}

.page-features-advanced .adv-note:hover .adv-note-detail,
.page-features-advanced .adv-note:focus-within .adv-note-detail {
  max-height: 5em;
  margin-top: var(--space-1);
  opacity: 1;
}

/* ---------- 上手顺序 ---------- */
.page-features-advanced .adv-path-section .section-head {
  max-width: var(--adv-narrow);
}

.page-features-advanced .adv-path {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  border-top: var(--adv-hair) solid var(--color-line);
}

.page-features-advanced .adv-path-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  padding: var(--space-4) 0;
  border-bottom: var(--adv-hair) solid var(--color-line);
}

.page-features-advanced .adv-path-index {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1;
  padding-top: 0.12em;
  color: var(--color-primary);
}

.page-features-advanced .adv-path-title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-features-advanced .adv-path-step p {
  margin: 0;
  max-width: var(--adv-narrow);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

/* ---------- 进阶明细 ---------- */
.page-features-advanced .adv-detail .section-head {
  max-width: var(--adv-narrow);
}

.page-features-advanced .adv-detail-scope {
  margin-top: var(--space-4);
}

.page-features-advanced .adv-detail-scope .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-bottom: var(--space-4);
}

.page-features-advanced .adv-entry-list {
  border-top: var(--adv-hair) solid var(--color-line);
}

.page-features-advanced .adv-entry {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-6) 0;
  border-bottom: var(--adv-hair) solid var(--color-line);
}

@media (min-width: 780px) {
  .page-features-advanced .adv-entry {
    grid-template-columns: 3.5rem minmax(0, 1fr);
    gap: var(--space-4);
  }
}

.page-features-advanced .adv-entry-body {
  max-width: calc(var(--adv-narrow) + 6rem);
}

.page-features-advanced .adv-entry-cat {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.page-features-advanced .adv-entry-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-features-advanced .adv-entry-desc {
  margin: 0 0 var(--space-3);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-features-advanced .adv-entry-fields {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--adv-hair);
  border: var(--adv-hair) solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-line);
  overflow: hidden;
}

@media (min-width: 640px) {
  .page-features-advanced .adv-entry-fields {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-features-advanced .adv-field {
  margin: 0;
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-alt);
}

.page-features-advanced .adv-field dt {
  margin-bottom: 0.3em;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-field dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink);
}

.page-features-advanced .adv-entry-figure {
  margin: var(--space-3) 0 0;
  border: var(--adv-hair) solid var(--color-line);
  border-radius: var(--radius-md);
}

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

.page-features-advanced .adv-detail-scope .filter-empty {
  margin: var(--space-4) 0 0;
}

/* ---------- 与父栏目的分工 ---------- */
.page-features-advanced .adv-compare .section-head {
  max-width: var(--adv-narrow);
}

.page-features-advanced .adv-compare-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-4);
}

@media (min-width: 820px) {
  .page-features-advanced .adv-compare-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
  }
}

.page-features-advanced .adv-compare-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border: var(--adv-hair) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
  color: var(--color-ink);
  text-decoration: none;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.page-features-advanced a.adv-compare-card:hover,
.page-features-advanced a.adv-compare-card:focus-visible {
  border-color: color-mix(in srgb, var(--color-accent) 55%, transparent);
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}

.page-features-advanced .adv-compare-card--current {
  border-color: color-mix(in srgb, var(--color-primary) 60%, transparent);
  background: var(--color-primary-soft);
}

.page-features-advanced .adv-compare-tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-compare-card h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-features-advanced .adv-compare-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-1);
}

.page-features-advanced .adv-compare-list li {
  position: relative;
  padding-left: var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.68;
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-compare-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 0.5rem;
  height: var(--adv-hair);
  background: var(--color-accent);
}

.page-features-advanced .adv-compare-card .link-arrow {
  margin-top: auto;
  align-self: flex-start;
  color: var(--color-accent);
  font-size: var(--text-sm);
}

/* ---------- 出口 ---------- */
.page-features-advanced .adv-exit-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
}

@media (min-width: 860px) {
  .page-features-advanced .adv-exit-panel {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.5fr);
    align-items: center;
    gap: var(--space-6);
  }
}

.page-features-advanced .adv-exit-copy {
  max-width: var(--adv-narrow);
}

.page-features-advanced .adv-exit-copy h2 {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-features-advanced .adv-exit-copy p {
  margin: 0;
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-features-advanced .adv-exit-copy a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--adv-hair) solid color-mix(in srgb, var(--color-accent) 45%, transparent);
}

.page-features-advanced .adv-exit-copy a:hover,
.page-features-advanced .adv-exit-copy a:focus-visible {
  border-bottom-color: var(--color-accent);
}

.page-features-advanced .adv-exit-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

@media (min-width: 860px) {
  .page-features-advanced .adv-exit-actions {
    justify-self: end;
    width: 100%;
  }
}

/* ---------- 悬浮返回胶囊 ---------- */
.page-features-advanced .adv-back-capsule {
  position: fixed;
  right: var(--space-2);
  bottom: var(--space-2);
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border: var(--adv-hair) solid color-mix(in srgb, var(--color-accent) 45%, transparent);
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--color-surface-deep) 88%, transparent);
  color: var(--color-ink);
  font-size: var(--text-sm);
  text-decoration: none;
  box-shadow: 0 0 20px color-mix(in srgb, var(--color-primary) 30%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-features-advanced .adv-back-capsule:hover,
.page-features-advanced .adv-back-capsule:focus-visible {
  border-color: var(--color-focus);
  color: var(--color-focus);
}

@media (min-width: 900px) {
  .page-features-advanced .adv-back-capsule {
    right: var(--space-4);
    bottom: var(--space-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-features-advanced .adv-note,
  .page-features-advanced .adv-note-detail,
  .page-features-advanced .adv-compare-card,
  .page-features-advanced .adv-back-capsule {
    transition: none;
  }

  .page-features-advanced a.adv-compare-card:hover,
  .page-features-advanced a.adv-compare-card:focus-visible {
    transform: none;
  }
}
<<<END>>>