/* ===== 功能特性页 /features/ ===== */

.page-features {
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* —— 首屏 —— */
.page-features .feat-hero {
  background-color: var(--color-surface-alt);
  padding: calc(var(--space-8) * 2 + var(--space-4)) 0 var(--space-8);
}

.page-features .feat-hero__title {
  margin: var(--space-4) 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);
  max-width: 12ch;
}

.page-features .feat-hero__lede {
  margin: var(--space-4) 0 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

.page-features .feat-figs {
  list-style: none;
  margin: var(--space-8) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6) var(--space-3);
}

.page-features .feat-fig {
  min-width: 0;
}

.page-features .feat-fig__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-ink);
}

.page-features .feat-fig__label {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-base);
}

.page-features .feat-fig__note {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

@media (min-width: 900px) {
  .page-features .feat-figs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-8) var(--space-4);
  }
}

/* —— 满宽横条图 —— */
.page-features .feat-band {
  padding-top: var(--space-8);
}

.page-features .feat-band img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background-color: var(--color-surface-deep);
}

/* —— 能力组 —— */
.page-features .feat-group {
  padding: var(--section-y) 0;
  background-color: var(--color-surface);
}

.page-features .feat-group--alt {
  background-color: var(--color-surface-alt);
}

.page-features .feat-group__head {
  max-width: 44ch;
}

.page-features .feat-group__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

.page-features .feat-group__tag {
  margin: var(--space-3) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

.page-features .feat-group__title {
  margin: var(--space-2) 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);
}

.page-features .feat-group__grid {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

@media (min-width: 1024px) {
  .page-features .feat-group__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
    margin-top: var(--space-8);
  }

  .page-features .feat-group--b .feat-group__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

/* —— 三段递进 —— */
.page-features .feat-steps {
  display: grid;
  gap: var(--space-4);
  align-content: start;
}

.page-features .feat-step {
  min-width: 0;
}

.page-features .feat-step__key {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

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

.page-features .feat-step--a .feat-step__text {
  color: var(--color-ink-soft);
}

.page-features .feat-step--c .feat-step__key {
  color: var(--color-accent);
}

@media (min-width: 768px) {
  .page-features .feat-step--b {
    padding-left: var(--space-4);
  }

  .page-features .feat-step--c {
    padding-left: var(--space-8);
  }
}

/* —— 关键数字展签 —— */
.page-features .feat-stat {
  min-width: 0;
}

.page-features .feat-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-primary);
  overflow-wrap: anywhere;
  transition: color 200ms ease-out;
}

.page-features .feat-stat:hover .feat-stat__num,
.page-features .feat-stat:focus-within .feat-stat__num {
  color: var(--color-ink);
}

.page-features .feat-stat__label {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-base);
}

.page-features .feat-stat__note {
  display: block;
  margin-top: var(--space-2);
  max-width: 34ch;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

/* —— 右侧栏 —— */
.page-features .feat-aside {
  display: grid;
  gap: var(--space-6);
  align-content: start;
}

.page-features .feat-aside img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background-color: var(--color-surface-deep);
}

/* —— 子页入口 —— */
.page-features .feat-more {
  display: block;
  margin-top: var(--space-4);
}

.page-features .feat-more__note {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

@media (min-width: 1024px) {
  .page-features .feat-more__note {
    margin-top: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 200ms ease-out, opacity 200ms ease-out, margin-top 200ms ease-out;
  }

  .page-features .feat-more:hover .feat-more__note,
  .page-features .feat-more:focus-visible .feat-more__note {
    margin-top: var(--space-1);
    max-height: 6em;
    opacity: 1;
  }
}

/* —— 递进淡入错峰 —— */
.page-features .feat-step--b.reveal {
  transition-delay: 80ms;
}

.page-features .feat-step--c.reveal {
  transition-delay: 160ms;
}

/* —— 收尾出口 —— */
.page-features .feat-exit {
  background-color: var(--color-surface-deep);
  padding: var(--section-y) 0;
}

.page-features .feat-exit__title {
  margin: 0;
  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);
}

.page-features .feat-exit__text {
  margin: var(--space-4) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-features .feat-exit__text a {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 0.25em;
  transition: color 200ms ease-out;
}

.page-features .feat-exit__text a:hover,
.page-features .feat-exit__text a:focus-visible {
  color: var(--color-accent);
}

/* —— 窄屏收口 —— */
@media (max-width: 560px) {
  .page-features .feat-hero {
    padding-top: calc(var(--space-8) * 2);
  }

  .page-features .feat-group__title {
    font-size: var(--text-lg);
  }

  .page-features .feat-stat__num,
  .page-features .feat-fig__num {
    letter-spacing: -0.04em;
  }
}

.page-features .feat-step__text,
.page-features .feat-fig__note,
.page-features .feat-stat__note,
.page-features .feat-exit__text {
  overflow-wrap: break-word;
}
<<<END>>>