.page-features-advanced {
  --adv-panel-radius: calc(var(--radius-sm) / 18);
  color: var(--color-ink);
}

.page-features-advanced .adv-intro {
  padding-block: var(--section-y) 0;
}

.page-features-advanced .adv-intro .crumbs {
  margin-bottom: var(--space-4);
}

.page-features-advanced .adv-intro__grid {
  max-width: var(--measure);
}

.page-features-advanced .adv-intro__eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-primary);
  margin: 0 0 var(--space-2);
}

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

.page-features-advanced .adv-h1__mark {
  background-image: linear-gradient(transparent 64%, var(--color-highlight) 64%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

.page-features-advanced .adv-lead {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0;
  max-width: 56ch;
}

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

.page-features-advanced .adv-toc {
  margin-top: var(--space-3);
  padding-block: var(--space-2);
  border-top: 1px dotted var(--color-line);
  border-bottom: 1px dotted var(--color-line);
}

.page-features-advanced .adv-toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 var(--space-1);
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-features-advanced .adv-toc__list li {
  flex: 0 0 auto;
}

.page-features-advanced .adv-toc__list a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 6px var(--space-2);
  border-radius: var(--radius-pill);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  color: var(--color-ink);
  font-size: var(--text-sm);
  text-decoration: none;
  white-space: nowrap;
}

.page-features-advanced .adv-toc__list a:hover,
.page-features-advanced .adv-toc__list a:focus-visible {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

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

.page-features-advanced .adv-toc__list a:hover .adv-toc__n,
.page-features-advanced .adv-toc__list a:focus-visible .adv-toc__n {
  color: color-mix(in srgb, var(--color-primary-ink) 72%, transparent);
}

/* 通用标题组 */
.page-features-advanced .adv-head {
  margin-bottom: var(--space-4);
}

.page-features-advanced .adv-head .index-tag {
  display: inline-flex;
  margin-bottom: var(--space-2);
}

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

.page-features-advanced .adv-head__sub {
  margin: 0;
  max-width: 58ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

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

/* 数字信号带 */
.page-features-advanced .adv-signal {
  display: grid;
  grid-template-columns: 1fr;
  margin: var(--space-4) 0 0;
  border-radius: var(--adv-panel-radius);
  background: var(--color-primary-soft);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 28%, transparent);
  overflow: hidden;
}

.page-features-advanced .adv-signal__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px dotted color-mix(in srgb, var(--color-primary) 34%, transparent);
}

.page-features-advanced .adv-signal__item:last-child {
  border-bottom: 0;
}

.page-features-advanced .adv-signal__k {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-signal__v {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1;
  color: var(--color-accent);
  letter-spacing: 0.02em;
}

/* 图片与图注 */
.page-features-advanced .adv-figure {
  margin: var(--space-4) 0 0;
}

.page-features-advanced .adv-figure .media {
  border-radius: 0;
  overflow: hidden;
}

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

.page-features-advanced .adv-figure__cap {
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--color-ink-muted);
}

/* 判断清单 */
.page-features-advanced .adv-fit__cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

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

.page-features-advanced .adv-fit__col--yes {
  background: var(--color-primary-soft);
  border-color: color-mix(in srgb, var(--color-primary) 32%, transparent);
}

.page-features-advanced .adv-fit__h {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  margin: 0 0 var(--space-2);
  color: var(--color-ink);
}

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

.page-features-advanced .adv-checklist li {
  position: relative;
  padding-left: 20px;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-features-advanced .adv-checklist li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
}

.page-features-advanced .adv-checklist--no li::before {
  background: var(--color-ink-muted);
}

/* 机制纵轴 */
.page-features-advanced .adv-axis {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
}

.page-features-advanced .adv-axis__item {
  position: relative;
  border-left: 1px dotted var(--color-line);
  padding-left: var(--space-3);
}

.page-features-advanced .adv-axis__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 0.42em;
  width: 9px;
  height: 9px;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
}

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

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

.page-features-advanced .adv-axis__body p {
  margin: 0 0 var(--space-2);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

/* 接入方式卡片 */
.page-features-advanced .adv-access__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.page-features-advanced .adv-access__card {
  position: relative;
  padding: var(--space-3);
  padding-top: var(--space-4);
  border-radius: var(--adv-panel-radius);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  overflow: hidden;
}

.page-features-advanced .adv-access__card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.page-features-advanced .adv-access__card .index-tag {
  margin-bottom: var(--space-2);
}

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

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

.page-features-advanced .adv-access__sub {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
  margin: var(--space-6) 0 var(--space-3);
  color: var(--color-ink);
}

/* 五步接入 */
.page-features-advanced .adv-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-features-advanced .adv-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--adv-panel-radius);
  background: var(--color-surface-alt);
  border-left: 3px solid var(--color-primary);
}

.page-features-advanced .adv-step__n {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-primary);
  padding-top: 0.2em;
}

.page-features-advanced .adv-step__body {
  display: grid;
  gap: var(--space-1);
  min-width: 0;
}

.page-features-advanced .adv-step__body .tag {
  display: inline-block;
  justify-self: start;
  cursor: help;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.03em;
}

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

/* 相邻做法对比 */
.page-features-advanced .adv-compare__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.page-features-advanced .adv-compare__col {
  display: grid;
  gap: var(--space-2);
  align-content: start;
  padding: var(--space-3);
  border-radius: var(--adv-panel-radius);
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface);
}

.page-features-advanced .adv-compare__col--keep {
  background: var(--color-primary-soft);
  border-color: color-mix(in srgb, var(--color-primary) 36%, transparent);
}

.page-features-advanced .adv-compare__col--rebuild {
  background: var(--color-surface-alt);
}

.page-features-advanced .adv-compare__col--swap {
  background: var(--color-highlight);
  border-color: color-mix(in srgb, var(--color-accent) 26%, transparent);
}

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

.page-features-advanced .adv-compare__col > .pill {
  justify-self: start;
}

.page-features-advanced .adv-compare__list {
  margin: 0;
  padding-top: var(--space-2);
  display: grid;
  gap: var(--space-2);
  border-top: 1px dotted color-mix(in srgb, var(--color-ink) 22%, transparent);
}

.page-features-advanced .adv-compare__list > div {
  display: grid;
  gap: 2px;
}

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

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

/* 疑问清单 */
.page-features-advanced .adv-faq__list {
  margin: 0;
  display: grid;
  gap: 0;
  border-radius: var(--adv-panel-radius);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  overflow: hidden;
}

.page-features-advanced .adv-faq__item {
  padding: var(--space-3);
  border-bottom: 1px dotted var(--color-line);
}

.page-features-advanced .adv-faq__item:last-child {
  border-bottom: 0;
}

.page-features-advanced .adv-faq__item dt {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: var(--leading-heading);
  letter-spacing: 0.01em;
  color: var(--color-ink);
  margin-bottom: var(--space-1);
}

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

/* 行动出口 */
.page-features-advanced .adv-outro {
  margin-top: var(--space-6);
}

.page-features-advanced .adv-outro__inner {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-3);
  border-radius: var(--adv-panel-radius);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-features-advanced .adv-outro__lead {
  margin: 0;
  max-width: 52ch;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-features-advanced .adv-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.page-features-advanced .adv-outro__meta {
  margin: 0;
  max-width: 58ch;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 74%, transparent);
}

.page-features-advanced .adv-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.page-features-advanced .adv-outro__links a {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-contrast-accent);
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 4px;
}

.page-features-advanced .adv-outro__links a:hover,
.page-features-advanced .adv-outro__links a:focus-visible {
  color: var(--color-contrast-ink);
}

.page-features-advanced .adv-toc__list a:focus-visible,
.page-features-advanced .adv-outro__links a:focus-visible,
.page-features-advanced .adv-outro__actions a:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
}

@media (min-width: 720px) {
  .page-features-advanced .adv-h1 {
    font-size: var(--text-3xl);
  }

  .page-features-advanced .adv-lead {
    font-size: var(--text-lg);
  }

  .page-features-advanced .adv-head__title {
    font-size: var(--text-2xl);
  }

  .page-features-advanced .adv-signal {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-features-advanced .adv-signal__item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
    border-bottom: 0;
    border-right: 1px dotted color-mix(in srgb, var(--color-primary) 34%, transparent);
  }

  .page-features-advanced .adv-signal__item:last-child {
    border-right: 0;
  }

  .page-features-advanced .adv-fit__cols {
    grid-template-columns: 1.08fr 0.92fr;
    gap: var(--space-4);
  }

  .page-features-advanced .adv-access__cards {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-features-advanced .adv-compare__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-features-advanced .adv-figure .media img {
    max-height: 460px;
  }

  .page-features-advanced .adv-outro__inner {
    padding: var(--space-4);
  }
}

@media (min-width: 980px) {
  .page-features-advanced .adv-toc {
    position: sticky;
    top: 0;
    z-index: 6;
    background: var(--color-surface);
  }

  .page-features-advanced .adv-axis__item {
    padding-left: var(--space-4);
  }

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

  .page-features-advanced .adv-step:last-child {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-features-advanced .adv-toc__list a,
  .page-features-advanced .adv-outro__links a {
    transition: none;
  }
}
<<<END>>>