.page-features-advanced {
  --adv-rail: 216px;
  --adv-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

.page-features-advanced .breadcrumb {
  padding-top: var(--space-4);
}

/* ---------- 首屏 ---------- */
.page-features-advanced .adv-hero {
  position: relative;
  overflow: hidden;
  margin-top: var(--space-3);
  padding: var(--space-6) 0 var(--space-6);
  background-color: var(--color-surface-alt);
  background-image: linear-gradient(-4deg, transparent 0 62%, var(--color-primary-soft) 62% 100%);
  border-bottom: var(--border-thick) solid var(--color-line);
}

.page-features-advanced .adv-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 230px;
  height: 230px;
  background: var(--color-accent);
  opacity: 0.12;
  transform: rotate(-8deg);
  pointer-events: none;
}

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

.page-features-advanced .adv-hero__kicker {
  display: inline-block;
  margin: 0 0 var(--space-3);
  padding: 3px var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-accent-ink);
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  transform: rotate(-1.5deg);
}

.page-features-advanced h1 {
  margin: 0 0 var(--space-3);
  max-width: 20ch;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(var(--text-xl), 5.2vw, var(--text-2xl));
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

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

.page-features-advanced .adv-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-hero__meta li {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.page-features-advanced .adv-hero__meta li::before {
  content: "";
  width: 7px;
  height: 7px;
  flex: none;
  background: var(--color-primary);
  transform: rotate(45deg);
}

/* ---------- 主体两栏 ---------- */
.page-features-advanced .adv-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  padding-top: var(--space-6);
  padding-bottom: var(--section-y);
}

.page-features-advanced .adv-side__label {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-side__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: advside;
}

.page-features-advanced .adv-side__link {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-2);
  border-left: var(--border-thick) solid var(--color-line);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.4;
  text-decoration: none;
  transition: border-color 160ms var(--adv-ease), color 160ms var(--adv-ease), background-color 160ms var(--adv-ease);
}

.page-features-advanced .adv-side__link:hover,
.page-features-advanced .adv-side__link:focus-visible {
  border-left-color: var(--color-primary);
  color: var(--color-ink);
  background: var(--color-surface-alt);
}

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

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

/* ---------- 区块 ---------- */
.page-features-advanced .adv-block {
  padding-bottom: var(--space-6);
}

.page-features-advanced .adv-block + .adv-block {
  padding-top: var(--space-6);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-features-advanced .adv-block__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.page-features-advanced .adv-block__no {
  flex: none;
  padding: 2px var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary-ink);
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  transform: translateY(-5px) rotate(-2deg);
}

.page-features-advanced .adv-block__head h2 {
  margin: 0;
  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);
  color: var(--color-ink);
}

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

.page-features-advanced .adv-subhead {
  margin: var(--space-6) 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-base);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-features-advanced .adv-tip {
  margin-top: var(--space-3) !important;
  padding-left: var(--space-3);
  border-left: var(--border-thick) solid var(--color-highlight);
  font-size: var(--text-sm) !important;
  color: var(--color-ink-soft) !important;
}

/* ---------- 概念对 ---------- */
.page-features-advanced .adv-pair {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
}

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

.page-features-advanced .adv-pair__k {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-accent);
}

.page-features-advanced .adv-pair__item p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ---------- 图片 ---------- */
.page-features-advanced .adv-figure {
  margin: 0 0 var(--space-4);
  border: var(--border-thin) solid var(--color-ink);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-alt);
}

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

.page-features-advanced .adv-figure__cap {
  display: block;
  padding: var(--space-1) var(--space-2);
  border-top: var(--border-thin) solid var(--color-ink);
  background: var(--color-surface);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

/* ---------- 版本卡片 ---------- */
.page-features-advanced .adv-version {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-4) 0 var(--space-2);
}

.page-features-advanced .adv-version__card {
  padding: var(--space-3);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-ink);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}

.page-features-advanced .adv-version__card--major {
  background: var(--color-primary-soft);
  transform: translateY(0);
}

.page-features-advanced .adv-tag {
  display: inline-block;
  margin-bottom: var(--space-2);
  padding: 2px var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-accent);
  border: var(--border-thin) solid currentColor;
  border-radius: var(--radius-sm);
}

.page-features-advanced .adv-version__card--major .adv-tag {
  color: var(--color-primary);
}

.page-features-advanced .adv-version__card h3 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-base);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

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

/* ---------- 字段清单 ---------- */
.page-features-advanced .adv-fields {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-features-advanced .adv-field {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1);
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

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

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

.page-features-advanced .adv-field:nth-child(even) {
  padding-left: var(--space-2);
  border-left: var(--border-thin) solid var(--color-highlight);
}

/* ---------- 回溯步骤 ---------- */
.page-features-advanced .adv-steps {
  display: grid;
  gap: var(--space-4);
  margin: var(--space-4) 0 var(--space-4);
  padding: 0;
  list-style: none;
}

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

.page-features-advanced .adv-step:target .adv-step__no {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-features-advanced .adv-step__no {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary-ink);
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-1);
  transform: translateY(-8px) rotate(-3deg);
}

.page-features-advanced .adv-step:nth-child(even) .adv-step__no {
  transform: translateY(4px) rotate(3deg);
}

.page-features-advanced .adv-step__body h3 {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-base);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

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

/* ---------- 适用条件 ---------- */
.page-features-advanced .adv-split {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-4) 0 0;
}

.page-features-advanced .adv-split__col {
  padding: var(--space-3);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-ink);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}

.page-features-advanced .adv-split__col--alt {
  background: var(--color-surface-alt);
  border-color: var(--color-line);
  box-shadow: none;
}

.page-features-advanced .adv-split__title {
  margin: 0 0 var(--space-3);
  padding-bottom: var(--space-1);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-base);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  border-bottom: var(--border-thin) solid var(--color-primary);
}

.page-features-advanced .adv-split__col--alt .adv-split__title {
  border-bottom-color: var(--color-line);
  color: var(--color-ink-soft);
}

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

.page-features-advanced .adv-check li {
  position: relative;
  padding-left: var(--space-4);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-features-advanced .adv-check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 18px;
  height: var(--border-thin);
  background: var(--color-accent);
}

.page-features-advanced .adv-check--muted li {
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-check--muted li::before {
  background: var(--color-ink-muted);
}

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

.page-features-advanced .adv-reqs li {
  display: flex;
  gap: var(--space-2);
  align-items: baseline;
  max-width: var(--measure);
  padding: var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
  background: var(--color-primary-soft);
  border-radius: var(--radius-sm);
}

.page-features-advanced .adv-reqs__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
}

/* ---------- 相邻主题 ---------- */
.page-features-advanced .adv-figure--wide {
  margin-top: var(--space-2);
}

.page-features-advanced .adv-next {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-features-advanced .adv-next__card {
  display: grid;
  gap: 4px;
  padding: var(--space-3);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-ink);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  color: var(--color-ink);
  text-decoration: none;
  transition: transform 180ms var(--adv-ease), box-shadow 180ms var(--adv-ease), background-color 180ms var(--adv-ease);
}

.page-features-advanced .adv-next__card:hover,
.page-features-advanced .adv-next__card:focus-visible {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-2);
  background: var(--color-primary-soft);
}

.page-features-advanced .adv-next__k {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.page-features-advanced .adv-next__t {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: var(--tracking-heading);
}

.page-features-advanced .adv-next__d {
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--color-ink-soft);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-features-advanced .adv-field {
    grid-template-columns: 160px minmax(0, 1fr);
    gap: var(--space-4);
    align-items: baseline;
  }

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

  .page-features-advanced .adv-version__card--major {
    transform: translateY(var(--space-1));
  }
}

@media (min-width: 760px) {
  .page-features-advanced .adv-split,
  .page-features-advanced .adv-next {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
  }

  .page-features-advanced .adv-step:nth-child(even) {
    margin-left: var(--space-4);
  }
}

@media (min-width: 960px) {
  .page-features-advanced .adv-hero {
    padding: var(--space-8) 0 var(--space-8);
  }

  .page-features-advanced .adv-layout {
    grid-template-columns: var(--adv-rail) minmax(0, 1fr);
    gap: var(--space-8);
    padding-top: var(--space-8);
    padding-bottom: var(--section-y-lg);
  }

  .page-features-advanced .adv-side {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-features-advanced .adv-block__head h2 {
    font-size: var(--text-xl);
  }

  .page-features-advanced .adv-block + .adv-block {
    padding-top: var(--space-8);
  }

  .page-features-advanced .adv-flow p {
    font-size: var(--text-base);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-features-advanced .adv-side__link,
  .page-features-advanced .adv-next__card,
  .page-features-advanced .adv-version__card {
    transition: none;
  }

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

  .page-features-advanced .adv-block__no,
  .page-features-advanced .adv-step__no,
  .page-features-advanced .adv-step:nth-child(even) .adv-step__no,
  .page-features-advanced .adv-hero__kicker,
  .page-features-advanced .adv-version__card--major {
    transform: none;
  }
}