.page-features {
  --fp-glass: color-mix(in srgb, var(--color-surface) 72%, transparent);
  --fp-hair: color-mix(in srgb, var(--color-primary) 18%, transparent);
  --fp-hair-strong: color-mix(in srgb, var(--color-primary) 38%, transparent);
  --fp-glow: color-mix(in srgb, var(--color-contrast-accent) 16%, transparent);
  --fp-glow-strong: color-mix(in srgb, var(--color-contrast-accent) 32%, transparent);
}

.page-features :is(h1, h2, h3) {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  line-height: var(--leading-heading);
  margin: 0;
}

.page-features .mono {
  font-family: var(--font-mono);
}

/* ============ Hero ============ */
.page-features .fp-hero {
  padding-top: var(--space-3);
  padding-bottom: var(--space-8);
}

.page-features .fp-hero__grid {
  display: grid;
  gap: var(--space-4);
  align-items: end;
}

.page-features .fp-hero__eyebrow {
  margin: 0 0 var(--space-2);
}

.page-features .fp-hero__title {
  margin: 0;
  line-height: 0.94;
  letter-spacing: -0.03em;
}

.page-features .fp-hero__title span {
  display: block;
  font-size: var(--text-display);
}

.page-features .fp-hero__title-alt {
  color: var(--color-accent);
}

.page-features .fp-hero__aside {
  display: grid;
  gap: var(--space-3);
}

.page-features .fp-hero__facts {
  list-style: none;
  margin: 0;
  padding: var(--space-3) 0 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-features .fp-hero__facts li {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.page-features .fp-hero__facts .mono {
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1;
  color: var(--color-primary);
}

.page-features .fp-hero__facts em {
  font-style: normal;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  line-height: 1.4;
}

.page-features .fp-hero__figure {
  margin: var(--space-6) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

/* ============ 章节导航 ============ */
.page-features .fp-toc {
  display: flex;
  gap: var(--space-1);
  overflow-x: auto;
  padding-bottom: var(--space-4);
  scrollbar-width: none;
}

.page-features .fp-toc::-webkit-scrollbar {
  display: none;
}

.page-features .fp-toc a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  border: var(--border-thin) solid var(--color-line);
  background: var(--fp-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-features .fp-toc a .mono {
  font-size: var(--text-xs);
  color: var(--color-primary);
}

.page-features .fp-toc a:hover,
.page-features .fp-toc a:focus-visible,
.page-features .fp-toc a.is-active {
  border-color: var(--fp-hair-strong);
  color: var(--color-primary);
}

/* ============ 总览深色看板 ============ */
.page-features .fp-overview {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-4);
  box-shadow: var(--shadow-2);
}

.page-features .fp-overview__head {
  display: grid;
  gap: var(--space-2);
  max-width: var(--measure);
}

.page-features .fp-overview__head .eyebrow {
  color: var(--color-contrast-accent);
}

.page-features .fp-overview__head h2 {
  color: var(--color-contrast-ink);
  font-size: var(--text-3xl);
}

.page-features .fp-overview__head p {
  margin: 0;
  color: var(--color-contrast-ink);
  opacity: 0.8;
}

.page-features .fp-overview__metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-features .fp-metric {
  display: grid;
  gap: var(--space-1);
  min-width: 0;
}

.page-features .fp-metric .metric__value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: 1;
  color: var(--color-contrast-accent);
}

.page-features .fp-metric .metric__label {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.page-features .fp-overview__groups {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-features .fp-gtag {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  min-width: 0;
}

.page-features .fp-gtag__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
  padding: 0 var(--space-1);
  border-radius: var(--radius-pill);
  background: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
}

.page-features .fp-gtag__name {
  margin: 0;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-contrast-ink);
}

.page-features .fp-gtag__desc {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
  opacity: 0.66;
}

.page-features .fp-zones {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: var(--space-4) 0 0;
  padding: 0;
}

.page-features .fp-zones li {
  font-size: var(--text-xs);
  padding: 3px var(--space-2);
  border-radius: var(--radius-pill);
  border: var(--border-thin) solid var(--color-contrast-line);
  color: var(--color-contrast-ink);
}

/* ============ 图文矩阵区块 ============ */
.page-features .fp-block {
  padding-block: var(--section-y);
}

.page-features .fp-block__grid {
  display: grid;
  gap: var(--space-6);
  align-items: start;
}

.page-features .fp-block__body {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}

.page-features .fp-block__body .eyebrow {
  margin: 0;
}

.page-features .fp-block__title {
  font-size: var(--text-3xl);
}

.page-features .fp-block__lede {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-features .fp-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

/* ---- 条目列表 ---- */
.page-features .fp-list {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-features .fp-item {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features .fp-item__meta {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.page-features .fp-item__title {
  font-size: var(--text-lg);
}

.page-features .fp-item__text {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

/* ---- 深色区内的条目 ---- */
.page-features .fp-list--dark {
  border-top-color: var(--color-contrast-line);
}

.page-features .fp-list--dark .fp-item {
  border-bottom-color: var(--color-contrast-line);
}

.page-features .fp-list--dark .fp-item__meta {
  color: var(--color-contrast-accent);
}

.page-features .fp-list--dark .fp-item__title {
  color: var(--color-contrast-ink);
}

.page-features .fp-list--dark .fp-item__text {
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

/* ============ 回放深色面板 ============ */
.page-features .fp-replay {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-4);
}

.page-features .fp-replay__grid {
  display: grid;
  gap: var(--space-6);
  align-items: start;
}

.page-features .fp-replay__body {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}

.page-features .fp-replay__body .eyebrow {
  margin: 0;
  color: var(--color-contrast-accent);
}

.page-features .fp-replay__body .fp-block__title {
  color: var(--color-contrast-ink);
}

.page-features .fp-replay__body .fp-block__lede {
  color: var(--color-contrast-ink);
  opacity: 0.8;
}

.page-features .fp-replay__side {
  display: grid;
  gap: var(--space-4);
  min-width: 0;
}

.page-features .fp-figure--dark {
  border-radius: var(--radius-md);
}

/* ---- 时长分段条 ---- */
.page-features .fp-seg {
  list-style: none;
  display: flex;
  gap: 2px;
  margin: 0;
  padding: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: var(--border-thin) solid var(--color-contrast-line);
}

.page-features .fp-seg__seg {
  display: grid;
  gap: 2px;
  justify-items: center;
  padding: var(--space-2) 2px;
  background: var(--fp-glow);
  transition: background 0.2s ease;
  min-width: 0;
}

.page-features .fp-seg__seg:hover,
.page-features .fp-seg__seg:focus-within {
  background: var(--fp-glow-strong);
}

.page-features .fp-seg__seg--a { flex: 62 1 0; }
.page-features .fp-seg__seg--b { flex: 118 1 0; }
.page-features .fp-seg__seg--c { flex: 96 1 0; }
.page-features .fp-seg__seg--d { flex: 44 1 0; }

.page-features .fp-seg__val {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1;
  color: var(--color-contrast-accent);
}

.page-features .fp-seg__label {
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
  opacity: 0.72;
  white-space: nowrap;
}

/* ============ 出口区 ============ */
.page-features .fp-exit {
  padding-block: var(--section-y);
}

.page-features .fp-exit__head {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.page-features .fp-exit__head .eyebrow {
  margin: 0;
}

.page-features .fp-exit__head h2 {
  font-size: var(--text-3xl);
  max-width: var(--measure);
}

.page-features .fp-exit__grid {
  display: grid;
  gap: var(--space-3);
}

.page-features .fp-jump {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: var(--border-thin) solid var(--color-line);
  background: var(--fp-glass);
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-features .fp-jump:hover,
.page-features .fp-jump:focus-visible {
  border-color: var(--fp-hair-strong);
  transform: translateY(-2px);
}

.page-features .fp-jump__k {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  color: var(--color-primary);
}

.page-features .fp-jump__d {
  font-size: var(--text-base);
  color: var(--color-ink-soft);
  max-width: 46ch;
}

.page-features .fp-jump__a {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
}

.page-features .fp-exit__note {
  margin: var(--space-4) 0 0;
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  max-width: var(--measure);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-features .fp-exit__note a {
  color: var(--color-primary);
  text-underline-offset: 3px;
}

/* ============ 焦点可访问 ============ */
.page-features a:focus-visible,
.page-features .fp-seg__seg:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-features .fp-overview {
    padding: var(--space-8) var(--space-6);
  }

  .page-features .fp-replay {
    padding: var(--space-8) var(--space-6);
  }

  .page-features .fp-overview__metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-features .fp-overview__groups {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-features .fp-exit__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-features .fp-hero {
    padding-top: var(--space-4);
  }

  .page-features .fp-hero__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: var(--space-8);
  }

  .page-features .fp-block__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    gap: var(--space-8);
  }

  .page-features .fp-block__grid--b {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1fr);
  }

  .page-features .fp-replay__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: var(--space-8);
    align-items: center;
  }

  .page-features .fp-hero__figure {
    margin-top: var(--space-8);
  }
}

@media (max-width: 559px) {
  .page-features .fp-seg__seg {
    padding: var(--space-2) 1px;
  }

  .page-features .fp-seg__val {
    font-size: var(--text-base);
  }

  .page-features .fp-seg__label {
    font-size: 11px;
    letter-spacing: -0.02em;
  }
}
<<<END>>>