.page-features {
  background: var(--color-surface);
  color: var(--color-ink);
  overflow-x: clip;
}

.page-features .breadcrumbs {
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-features a {
  color: var(--color-primary);
}

/* ---------- 首屏 ---------- */

.page-features .feat-hero {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features .feat-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.page-features .feat-hero__cover {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-alt);
  box-shadow: var(--shadow-2);
}

.page-features .feat-hero__media {
  grid-area: 1 / 1;
  position: relative;
  aspect-ratio: 4 / 5;
  min-height: 300px;
  border: 0;
  border-radius: 0;
}

.page-features .feat-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-features .feat-hero__copy {
  grid-area: 1 / 1;
  z-index: 2;
  align-self: end;
  padding: var(--space-4) var(--space-3) var(--space-3);
}

.page-features .feat-hero__copy .eyebrow {
  color: var(--color-contrast-accent);
}

.page-features .feat-hero__title {
  margin: var(--space-1) 0 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  text-wrap: balance;
}

.page-features .feat-hero__figures {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  align-content: end;
}

.page-features .feat-fig {
  padding: var(--space-2) var(--space-3) var(--space-2);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.page-features .feat-fig--b {
  background: var(--color-primary-soft);
}

.page-features .feat-fig--d {
  background: var(--color-surface-deep);
}

.page-features .feat-fig__line {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  margin: 0;
}

.page-features .feat-fig__num {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.012em;
  color: var(--color-ink);
}

.page-features .feat-fig__num--hot {
  color: var(--color-accent);
}

.page-features .feat-fig__unit {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-features .feat-fig__scope {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-features .feat-hero__lede {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

@media (min-width: 900px) {
  .page-features .feat-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: var(--space-6);
    align-items: stretch;
  }

  .page-features .feat-hero__media {
    aspect-ratio: 4 / 5;
    min-height: 420px;
  }

  .page-features .feat-hero__figures {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-2);
  }

  .page-features .feat-fig--a { grid-column: span 7; }
  .page-features .feat-fig--b { grid-column: span 5; }
  .page-features .feat-fig--c { grid-column: span 8; }
  .page-features .feat-fig--d { grid-column: span 4; }
}

/* ---------- 区块页眉 ---------- */

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

.page-features .feat-head__title {
  margin: var(--space-1) 0 0;
  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);
  color: var(--color-ink);
}

.page-features .feat-head__meta {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

/* ---------- 筛选栏 ---------- */

.page-features .feat-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) 0;
  margin-bottom: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features .feat-filter .filter-btn {
  padding: 6px 14px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ink-soft);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: background-color 220ms ease, color 220ms ease, border-color 220ms ease;
}

.page-features .feat-filter .filter-btn:hover {
  background: var(--color-primary-soft);
  color: var(--color-ink);
}

.page-features .feat-filter .filter-btn[aria-pressed="true"] {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-color: var(--color-contrast-surface);
}

.page-features .feat-filter .filter-btn:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
}

.page-features .feat-filter__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

/* ---------- 指标条目 ---------- */

.page-features .metric-list {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features .metric {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1);
  padding: var(--space-3) var(--space-2) var(--space-3) var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  transition: background-color 240ms ease;
}

.page-features .metric::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-accent);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 260ms cubic-bezier(0.2, 0.7, 0.3, 1);
}

.page-features .metric:hover {
  background: var(--color-surface-alt);
}

.page-features .metric:hover::before,
.page-features .metric:focus-within::before {
  transform: scaleY(1);
}

.page-features .metric__lead {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  margin: 0;
}

.page-features .metric__num {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.012em;
  color: var(--color-ink);
}

.page-features .metric__unit {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-features .metric__main {
  min-width: 0;
}

.page-features .metric__name {
  margin: 0 0 var(--space-1);
  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 .metric__scope {
  max-width: var(--measure);
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-features .metric:hover .metric__scope {
  color: var(--color-ink);
}

.page-features .metric__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0;
}

@media (min-width: 760px) {
  .page-features .metric {
    grid-template-columns: minmax(0, 176px) minmax(0, 1fr);
    gap: var(--space-4);
    padding: var(--space-3) var(--space-3) var(--space-3) var(--space-4);
    align-items: start;
  }
}

/* ---------- 图文分栏区块 ---------- */

.page-features .feat-split__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  align-items: start;
}

.page-features .feat-split__title {
  margin: var(--space-1) 0 var(--space-3);
  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);
  color: var(--color-ink);
}

.page-features .feat-split__text {
  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 .feat-split__link {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-features .feat-split__link a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 860px) {
  .page-features .feat-split__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-6);
  }

  .page-features .feat-split--flip .feat-split__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-features .feat-split--flip .feat-split__media {
    order: 2;
  }
}

/* ---------- 口径说明 ---------- */

.page-features .feat-scope__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  align-items: start;
}

.page-features .feat-scope__title {
  margin: var(--space-1) 0 var(--space-2);
  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);
  color: var(--color-ink);
}

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

.page-features .feat-scope__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-features .feat-scope__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1);
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features .feat-scope__label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  color: var(--color-primary);
}

.page-features .feat-scope__text {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-features .feat-scope__link {
  max-width: var(--measure);
  margin: var(--space-3) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-features .feat-scope__link a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 640px) {
  .page-features .feat-scope__item {
    grid-template-columns: minmax(0, 168px) minmax(0, 1fr);
    gap: var(--space-3);
    align-items: baseline;
  }
}

@media (min-width: 940px) {
  .page-features .feat-scope__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-6);
  }
}

/* ---------- 反色收口区块 ---------- */

.page-features .section--contrast .feat-update {
  max-width: 46rem;
}

.page-features .feat-update__eyebrow {
  color: var(--color-contrast-accent);
}

.page-features .feat-update__title {
  margin: var(--space-1) 0 var(--space-3);
  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);
  color: var(--color-contrast-ink);
}

.page-features .feat-update__text {
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-features .feat-update__steps {
  list-style: none;
  margin: 0 0 var(--space-3);
  padding: 0;
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-features .feat-update__step {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1);
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-features .feat-update__stepnum {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-accent);
}

.page-features .feat-update__steptext {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-features .feat-update__foot {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-features .section--contrast a {
  color: var(--color-contrast-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 640px) {
  .page-features .feat-update__step {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: var(--space-3);
    align-items: baseline;
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-features .metric,
  .page-features .metric::before,
  .page-features .feat-filter .filter-btn {
    transition: none;
  }

  .page-features .metric::before {
    transform: scaleY(1);
    opacity: 0;
  }

  .page-features .metric:hover::before,
  .page-features .metric:focus-within::before {
    opacity: 1;
  }
}