.page-features-advanced .adv-head {
  padding: var(--space-6) 0 var(--space-4);
}

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

.page-features-advanced .adv-head h1 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  max-width: 24ch;
  margin: var(--space-2) 0 var(--space-3);
}

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

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

/* ---- 左侧索引 ---- */

.page-features-advanced .adv-rail {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-bottom: var(--space-4);
}

.page-features-advanced .adv-back {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--color-primary-soft);
  padding-bottom: 2px;
  transition: color 180ms ease, border-color 180ms ease;
}

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

.page-features-advanced .adv-rail nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

/* ---- 正文区 ---- */

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

.page-features-advanced .adv-block {
  padding: var(--space-6) 0;
  border-top: 2px solid var(--color-line);
}

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

.page-features-advanced .adv-block:last-child {
  padding-bottom: 0;
}

.page-features-advanced .adv-block__head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.page-features-advanced .adv-block__no {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-radius: var(--radius-sm);
  padding: 3px 8px;
  line-height: 1.4;
}

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

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

.page-features-advanced .adv-block a:not(.btn) {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-features-advanced .adv-block strong {
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

/* ---- 条件徽标 ---- */

.page-features-advanced .adv-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

.page-features-advanced .adv-badge {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.02em;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-radius: var(--radius-pill);
  padding: 4px 11px;
  line-height: 1.5;
  white-space: nowrap;
}

.page-features-advanced .adv-badge--warn {
  color: var(--color-ink-soft);
  background: var(--color-surface-deep);
}

/* ---- 导语色条 ---- */

.page-features-advanced .adv-lead {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-2);
  color: var(--color-ink-soft) !important;
  font-size: var(--text-base);
  margin: 0 0 var(--space-4) !important;
}

/* ---- 三类情形 ---- */

.page-features-advanced .adv-cases {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-4);
  display: grid;
  gap: var(--space-2);
}

.page-features-advanced .adv-cases li {
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  border-top: 3px solid var(--color-primary);
}

.page-features-advanced .adv-cases h3 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: 1.4;
  color: var(--color-ink);
  margin: 0 0 var(--space-1);
}

.page-features-advanced .adv-cases p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.72;
  color: var(--color-ink-soft);
}

/* ---- 图片容器 ---- */

.page-features-advanced .adv-figure {
  margin: var(--space-4) 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-deep);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-1);
}

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

.page-features-advanced .adv-figure figcaption {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
  background: var(--color-surface);
  border-top: 1px solid var(--color-line);
}

/* ---- 步骤列表 ---- */

.page-features-advanced .adv-steps {
  list-style: none;
  padding: 0;
  margin: var(--space-3) 0 var(--space-4);
  display: grid;
  gap: var(--space-1);
  counter-reset: adv-step;
}

.page-features-advanced .adv-steps li {
  position: relative;
  counter-increment: adv-step;
  padding: var(--space-2) var(--space-3) var(--space-2) calc(var(--space-6) + var(--space-1));
  background: var(--color-surface-alt);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  line-height: 1.72;
  color: var(--color-ink);
}

.page-features-advanced .adv-steps li::before {
  content: counter(adv-step, decimal-leading-zero);
  position: absolute;
  left: var(--space-3);
  top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-primary);
}

/* ---- 定义列表 ---- */

.page-features-advanced .adv-def {
  margin: var(--space-4) 0;
  display: grid;
  gap: var(--space-3);
}

.page-features-advanced .adv-def dt {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
  color: var(--color-primary);
  padding-bottom: var(--space-1);
  border-bottom: 2px solid var(--color-primary-soft);
  margin-bottom: var(--space-1);
}

.page-features-advanced .adv-def dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.72;
  color: var(--color-ink-soft);
}

/* ---- 差异对照 ---- */

.page-features-advanced .adv-diff {
  margin: var(--space-4) 0;
  border-top: 2px solid var(--color-primary);
  border-bottom: 1px solid var(--color-line);
}

.page-features-advanced .adv-diff__head {
  display: none;
}

.page-features-advanced .adv-diff__row {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-line);
}

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

.page-features-advanced .adv-diff__key {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  color: var(--color-ink);
  margin-bottom: var(--space-1);
}

.page-features-advanced .adv-diff__std,
.page-features-advanced .adv-diff__adv {
  font-size: var(--text-sm);
  line-height: 1.72;
  color: var(--color-ink-soft);
  margin-bottom: var(--space-1);
}

.page-features-advanced .adv-diff__std::before {
  content: "标准覆盖档 · ";
  font-family: var(--font-mono);
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-diff__adv::before {
  content: "进阶覆盖档 · ";
  font-family: var(--font-mono);
  color: var(--color-primary);
}

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

/* ---- 不适用提示 ---- */

.page-features-advanced .adv-stop {
  background: var(--color-surface-deep);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-3);
  margin: var(--space-3) 0 var(--space-4);
}

.page-features-advanced .adv-stop p {
  color: var(--color-ink-soft);
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

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

.page-features-advanced .adv-stop a {
  color: var(--color-primary);
  font-weight: var(--weight-heading);
}

/* ---- 行动出口 ---- */

.page-features-advanced .adv-exit {
  border-top: 2px solid var(--color-line);
  padding-top: var(--space-4);
  margin-top: var(--space-4);
}

.page-features-advanced .adv-exit__lead {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-2);
}

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

.page-features-advanced .adv-exit__links .btn {
  font-size: var(--text-sm);
}

/* ---- 桌面端 ---- */

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

  .page-features-advanced .adv-head h1 {
    font-size: var(--text-4xl);
    max-width: 20ch;
  }

  .page-features-advanced .adv-rail {
    position: sticky;
    top: var(--space-4);
    align-self: start;
    padding-bottom: 0;
  }

  .page-features-advanced .adv-block {
    padding: var(--space-8) 0;
  }

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

  .page-features-advanced .adv-block h2 {
    font-size: var(--text-3xl);
  }

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

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

  .page-features-advanced .adv-figure {
    margin: var(--space-6) 0;
  }

  .page-features-advanced .adv-figure--square {
    max-width: 520px;
  }

  .page-features-advanced .adv-diff__head {
    display: grid;
    grid-template-columns: minmax(140px, 0.85fr) 1.6fr 1.6fr;
    gap: var(--space-4);
    padding: var(--space-2) var(--space-2);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-ink-muted);
  }

  .page-features-advanced .adv-diff__row {
    display: grid;
    grid-template-columns: minmax(140px, 0.85fr) 1.6fr 1.6fr;
    gap: var(--space-4);
    align-items: start;
    padding: var(--space-3) var(--space-2);
    border-radius: var(--radius-sm);
    transition: background-color 180ms ease, border-color 180ms ease;
  }

  .page-features-advanced .adv-diff__row:hover,
  .page-features-advanced .adv-diff__row:focus-within {
    background: var(--color-primary-soft);
    border-bottom-color: var(--color-primary);
  }

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

  .page-features-advanced .adv-diff__std::before,
  .page-features-advanced .adv-diff__adv::before {
    content: none;
  }

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

  .page-features-advanced .adv-stop {
    padding: var(--space-6) var(--space-4);
  }

  .page-features-advanced .adv-exit {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
  }

  .page-features-advanced .adv-exit__lead {
    margin: 0;
  }
}
<<<PAGE_CSS_END>>>