.page-features-advanced {
  --adv-rule: var(--border-thin) solid var(--color-line);
  --adv-dot: var(--border-thin) dotted var(--color-line);
  background: var(--color-surface);
  color: var(--color-ink);
}

.page-features-advanced p,
.page-features-advanced h1,
.page-features-advanced h2,
.page-features-advanced h3,
.page-features-advanced ul,
.page-features-advanced ol,
.page-features-advanced figure {
  margin: 0;
}

.page-features-advanced h2,
.page-features-advanced h3 {
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.page-features-advanced .adv-crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: baseline;
  padding-top: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-crumbs .crumbs__item + .crumbs__item::before {
  content: "/";
  margin-right: var(--space-2);
  color: var(--color-line);
}

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

@media (min-width: 900px) {
  .page-features-advanced .adv-sec {
    padding-top: var(--section-y);
    padding-bottom: var(--section-y);
  }
}

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

.page-features-advanced .adv-head__grid {
  row-gap: var(--space-6);
}

.page-features-advanced .adv-title {
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin-top: var(--space-3);
  max-width: 22ch;
  overflow-wrap: anywhere;
}

@media (min-width: 900px) {
  .page-features-advanced .adv-title {
    font-size: var(--text-4xl);
  }
}

.page-features-advanced .adv-lede {
  margin-top: var(--space-4);
  max-width: 62ch;
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-stat-group {
  border-top: var(--adv-rule);
}

.page-features-advanced .adv-stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  border-bottom: var(--adv-rule);
}

.page-features-advanced .adv-stat .stat__label {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  letter-spacing: 0.08em;
}

.page-features-advanced .adv-stat .stat__value {
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
  white-space: nowrap;
}

/* 条带图 */
.page-features-advanced .adv-band {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: clamp(220px, 36vw, 420px);
  margin-top: var(--space-6);
  overflow: hidden;
  border-top: var(--adv-rule);
  border-bottom: var(--adv-rule);
  isolation: isolate;
}

.page-features-advanced .adv-band__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.page-features-advanced .adv-band__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  z-index: -1;
}

.page-features-advanced .adv-band__inner {
  padding-top: var(--space-8);
  padding-bottom: var(--space-6);
}

.page-features-advanced .adv-band__text {
  max-width: 46ch;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

/* 通用小标题 */
.page-features-advanced .adv-h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-3);
  max-width: 26ch;
}

@media (min-width: 900px) {
  .page-features-advanced .adv-h2 {
    font-size: var(--text-3xl);
  }
}

.page-features-advanced .adv-h2--on-dark {
  color: var(--color-contrast-ink);
}

/* 困惑三问 */
.page-features-advanced .adv-why__list {
  margin-top: var(--space-6);
  border-top: var(--adv-rule);
}

.page-features-advanced .adv-why__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-bottom: var(--adv-rule);
}

.page-features-advanced .adv-why__no {
  font-size: var(--text-lg);
  line-height: 1;
  color: var(--color-primary);
  padding-top: 4px;
}

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

.page-features-advanced .adv-why__body p {
  margin-top: var(--space-2);
  max-width: 68ch;
  color: var(--color-ink-soft);
}

@media (min-width: 900px) {
  .page-features-advanced .adv-why__item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: var(--space-4);
    padding: var(--space-6) 0;
  }

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

/* 六项能力 */
.page-features-advanced .adv-items__lede {
  margin-top: var(--space-4);
  max-width: 68ch;
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-figure {
  margin-top: var(--space-6);
  border-bottom: var(--adv-dot);
  padding-bottom: var(--space-3);
}

.page-features-advanced .adv-figure__img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 360px;
  object-fit: cover;
  border-top: var(--adv-rule);
  border-bottom: var(--adv-rule);
}

.page-features-advanced .adv-figure__cap {
  display: block;
  margin-top: var(--space-2);
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-accordion {
  margin-top: var(--space-6);
  border-top: var(--adv-rule);
}

.page-features-advanced .adv-item {
  border-bottom: var(--adv-rule);
}

.page-features-advanced .adv-item__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  align-items: baseline;
  padding: var(--space-3) var(--space-1);
  cursor: pointer;
  list-style: none;
  transition: background-color 150ms linear;
}

.page-features-advanced .adv-item__summary::-webkit-details-marker {
  display: none;
}

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

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

.page-features-advanced .adv-item__no {
  font-size: var(--text-sm);
  color: var(--color-primary);
  letter-spacing: 0.08em;
}

.page-features-advanced .adv-item__name {
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
}

.page-features-advanced .adv-item__hint {
  grid-column: 2;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-features-advanced .adv-item[open] .adv-item__name {
  color: var(--color-primary);
}

.page-features-advanced .adv-item__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  padding: var(--space-2) var(--space-1) var(--space-6);
}

.page-features-advanced .adv-item__main p {
  max-width: 66ch;
}

.page-features-advanced .adv-item__main p + p {
  margin-top: var(--space-2);
}

.page-features-advanced .adv-item__use,
.page-features-advanced .adv-item__diff {
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-item__read {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  border-top: var(--adv-dot);
  padding-top: var(--space-2);
  margin-top: var(--space-3);
}

.page-features-advanced .adv-item__side {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-top: var(--space-2);
  border-top: var(--adv-dot);
}

.page-features-advanced .adv-item__figure {
  font-size: var(--text-2xl);
  line-height: 1;
  color: var(--color-primary);
  letter-spacing: var(--tracking-heading);
}

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

@media (min-width: 720px) {
  .page-features-advanced .adv-item__body {
    grid-template-columns: minmax(0, 1fr) 200px;
    gap: var(--space-6);
  }

  .page-features-advanced .adv-item__side {
    border-top: none;
    border-left: var(--adv-dot);
    padding-top: 0;
    padding-left: var(--space-4);
  }
}

/* 档位对照 */
.page-features-advanced .adv-compare__lede {
  margin-top: var(--space-4);
  max-width: 68ch;
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-cmp {
  margin-top: var(--space-6);
  border-top: var(--adv-rule);
}

.page-features-advanced .adv-cmp__row {
  padding: var(--space-4) var(--space-2);
  border-bottom: var(--adv-dot);
  transition: background-color 150ms linear;
}

.page-features-advanced .adv-cmp__row:hover {
  background: var(--color-highlight);
}

.page-features-advanced .adv-cmp__label {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.page-features-advanced .adv-cmp__line {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: baseline;
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-cmp__line + .adv-cmp__line {
  margin-top: var(--space-2);
}

.page-features-advanced .adv-cmp__line--adv {
  color: var(--color-ink);
}

.page-features-advanced .adv-cmp__line--adv .adv-cmp__tier {
  color: var(--color-primary);
}

.page-features-advanced .adv-cmp__tier {
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  white-space: nowrap;
}

.page-features-advanced .adv-compare__note {
  margin-top: var(--space-4);
  max-width: 68ch;
  color: var(--color-ink-soft);
}

/* 使用时机 */
.page-features-advanced .adv-when__grid {
  row-gap: var(--space-6);
}

.page-features-advanced .adv-when__list {
  list-style: none;
  padding: 0;
  margin-top: var(--space-6);
  border-top: var(--adv-rule);
}

.page-features-advanced .adv-when__item {
  padding: var(--space-4) 0;
  border-bottom: var(--adv-rule);
}

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

.page-features-advanced .adv-when__item p {
  margin-top: var(--space-2);
  max-width: 62ch;
  color: var(--color-ink-soft);
}

.page-features-advanced .adv-when__figure {
  border-top: var(--adv-rule);
  padding-top: var(--space-3);
}

.page-features-advanced .adv-when__img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 340px;
  object-fit: cover;
}

.page-features-advanced .adv-when__figure figcaption {
  display: block;
  margin-top: var(--space-2);
  color: var(--color-ink-muted);
}

/* 行动出口 */
.page-features-advanced .adv-exit {
  padding-bottom: var(--space-8);
}

.page-features-advanced .adv-exit__panel {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border: var(--border-thin) solid var(--color-contrast-line);
  padding: var(--space-6) var(--space-4);
}

@media (min-width: 900px) {
  .page-features-advanced .adv-exit__panel {
    padding: var(--space-8) var(--space-6);
  }
}

.page-features-advanced .adv-exit__grid {
  row-gap: var(--space-6);
}

.page-features-advanced .adv-exit__text {
  margin-top: var(--space-3);
  max-width: 58ch;
  color: var(--color-contrast-ink);
}

.page-features-advanced .adv-exit__links {
  border-top: var(--border-thin) solid var(--color-contrast-line);
  list-style: none;
  padding: 0;
}

.page-features-advanced .adv-exit__links li {
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-features-advanced .adv-exit__links a {
  display: block;
  padding: var(--space-3) 0;
  color: var(--color-contrast-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) dotted transparent;
  transition: color 150ms linear, padding-left 150ms linear;
  font-size: var(--text-base);
}

.page-features-advanced .adv-exit__links a:hover,
.page-features-advanced .adv-exit__links a:focus-visible {
  color: var(--color-contrast-accent);
  padding-left: var(--space-2);
}

.page-features-advanced .adv-exit__mini {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

.page-features-advanced .adv-exit__ink {
  color: var(--color-contrast-ink);
  border-bottom: var(--border-thin) dotted var(--color-contrast-line);
}

.page-features-advanced .adv-exit__ink:hover {
  color: var(--color-contrast-accent);
  border-bottom-style: solid;
}

/* 宽屏锚点索引 */
.page-features-advanced .adv-rail {
  display: none;
}

@media (min-width: 1440px) {
  .page-features-advanced .adv-rail {
    display: grid;
    gap: var(--space-2);
    position: fixed;
    right: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    z-index: 20;
    border-left: var(--adv-rule);
    padding-left: var(--space-3);
  }

  .page-features-advanced .adv-rail a {
    font-size: var(--text-sm);
    color: var(--color-ink-muted);
    text-decoration: none;
    transition: color 150ms linear;
  }

  .page-features-advanced .adv-rail a:hover,
  .page-features-advanced .adv-rail a:focus-visible,
  .page-features-advanced .adv-rail a[aria-current] {
    color: var(--color-primary);
  }
}