.page-features {
  --feat-rail-w: 200px;
  --feat-idx-w: calc(var(--space-3) + var(--space-1));
}

/* ---------- 首屏 ---------- */
.page-features .feat-hero {
  position: relative;
  padding-block: var(--space-4) var(--space-8);
  border-bottom: var(--border-thin) dotted var(--color-line);
  background-image: radial-gradient(
    120% 72% at 10% 0%,
    color-mix(in srgb, var(--color-primary) 11%, transparent) 0%,
    transparent 62%
  );
}

.page-features .feat-hero__title {
  margin: var(--space-2) 0 var(--space-3);
  max-width: 16ch;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

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

/* ---------- 悬浮仪表盘 ---------- */
.page-features .feat-dials {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.page-features .feat-dial {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-left: calc(var(--border-thin) * 3) solid var(--color-line);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-1);
  transition: background-color 0.16s ease, border-color 0.16s ease;
}

.page-features .feat-dial:hover,
.page-features .feat-dial:focus-within {
  background: var(--color-highlight);
  border-left-color: var(--color-primary);
}

.page-features .feat-dial__art {
  display: block;
  width: 100%;
  max-width: calc(var(--space-8) * 2);
  height: auto;
  margin-bottom: var(--space-1);
}

.page-features .feat-dial__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

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

.page-features .feat-ring__track {
  fill: none;
  stroke: var(--color-line);
  stroke-width: 7;
}

.page-features .feat-ring__value {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 7;
  stroke-dasharray: 186 290;
  transform-box: fill-box;
  transform-origin: center;
  transform: rotate(-90deg);
}

.page-features .feat-bars__bar {
  fill: var(--color-line);
}

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

.page-features .feat-bars__bar--b {
  fill: var(--color-accent);
}

.page-features .feat-axis__line {
  stroke: var(--color-line);
  stroke-width: 2;
}

.page-features .feat-axis__tick {
  stroke: var(--color-ink-muted);
  stroke-width: 2;
}

.page-features .feat-axis__mark {
  fill: var(--color-primary);
}

/* ---------- 关键数字带 ---------- */
.page-features .feat-tally {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 var(--space-4);
  margin-top: var(--space-6);
}

.page-features .feat-tally__item {
  padding: var(--space-2) 0;
  border-top: var(--border-thin) dotted var(--color-line);
}

.page-features .feat-tally__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-primary);
}

.page-features .feat-tally__label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 控制台骨架 ---------- */
.page-features .feat-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  padding-block: var(--space-8);
}

.page-features .feat-rail {
  border-top: var(--border-thin) dotted var(--color-line);
  padding-top: var(--space-2);
}

.page-features .rail__title {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink-muted);
  margin-bottom: var(--space-2);
}

.page-features .rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-1);
}

.page-features .rail__link {
  display: block;
  padding: var(--space-1) var(--space-2);
  border-left: var(--border-thin) solid var(--color-line);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}

.page-features .rail__link:hover,
.page-features .rail__link:focus-visible {
  color: var(--color-ink);
  border-left-color: var(--color-primary);
  background: var(--color-highlight);
}

.page-features .rail__link[aria-current="true"] {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.page-features .rail__link:focus-visible {
  outline: calc(var(--border-thin) * 2) solid var(--color-focus);
  outline-offset: calc(var(--border-thin) * 2);
}

.page-features .feat-stream {
  display: grid;
  gap: var(--space-8);
  min-width: 0;
}

/* ---------- 功能区块 ---------- */
.page-features .feat-block {
  min-width: 0;
  scroll-margin-top: var(--space-8);
}

.page-features .feat-block__head {
  display: grid;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}

.page-features .feat-block__idx {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.24em;
  color: var(--color-primary);
}

.page-features .feat-block__title {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

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

/* ---------- 难处 / 做法 / 收获 ---------- */
.page-features .feat-benefit {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: var(--border-thin) dotted var(--color-line);
  margin-bottom: var(--space-4);
}

.page-features .feat-benefit__cell {
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) dotted var(--color-line);
}

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

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

.page-features .feat-benefit__cell--gain p {
  color: var(--color-ink);
}

/* ---------- 图文分栏 ---------- */
.page-features .feat-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  align-items: start;
}

.page-features .feat-split__media,
.page-features .feat-split__side {
  min-width: 0;
}

.page-features .feat-split__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

/* ---------- 读数路径 ---------- */
.page-features .feat-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-features .feat-step {
  display: grid;
  grid-template-columns: var(--feat-idx-w) minmax(0, 1fr);
  column-gap: var(--space-2);
  padding: var(--space-3) var(--space-2) var(--space-3) 0;
  border-top: var(--border-thin) dotted var(--color-line);
  transition: background-color 0.16s ease;
}

.page-features .feat-step:hover {
  background: var(--color-highlight);
}

.page-features .feat-step__idx {
  grid-column: 1;
  grid-row: 1 / -1;
  padding-top: 0.2em;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
}

.page-features .feat-step__title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

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

.page-features .feat-step__meta {
  margin: var(--space-1) 0 0;
  font-size: var(--text-xs);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
  transition: color 0.16s ease;
}

.page-features .feat-step:hover .feat-step__meta {
  color: var(--color-primary);
}

/* ---------- 替补指标 ---------- */
.page-features .feat-metrics {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-features .feat-metric {
  padding: var(--space-2) 0;
  border-top: var(--border-thin) dotted var(--color-line);
}

.page-features .feat-metric__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin: 0 0 var(--space-1);
}

.page-features .feat-metric__idx {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
}

.page-features .feat-metric__name {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

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

.page-features .feat-note {
  margin: var(--space-3) 0 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) dotted var(--color-line);
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

/* ---------- 反相补时条 ---------- */
.page-features .feat-callout {
  display: grid;
  gap: var(--space-1);
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-sm);
}

.page-features .feat-callout__label {
  margin: 0;
  color: var(--color-contrast-accent);
}

.page-features .feat-callout__figure {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-accent);
}

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

/* ---------- 组合场景 ---------- */
.page-features .feat-combos {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-features .feat-combo {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  border-top: var(--border-thin) dotted var(--color-line);
}

.page-features .feat-combo__idx {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-primary);
}

.page-features .feat-combo__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-features .feat-combo__path {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  overflow-wrap: anywhere;
}

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

/* ---------- 行动出口 ---------- */
.page-features .feat-exit {
  margin-top: var(--space-6);
  padding-block: var(--space-6) var(--space-8);
  border-top: var(--border-thin) dotted var(--color-line);
}

.page-features .feat-exit__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-features .feat-exit__text {
  margin: var(--space-2) 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__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-features .feat-exit__link {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: var(--border-thin) dotted var(--color-line);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.16s ease, background-color 0.16s ease;
}

.page-features .feat-exit__link:hover {
  background: var(--color-highlight);
  border-color: var(--color-primary);
}

.page-features .feat-exit__link:focus-visible {
  outline: calc(var(--border-thin) * 2) solid var(--color-focus);
  outline-offset: calc(var(--border-thin) * 2);
}

.page-features .feat-exit__link-idx {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
}

.page-features .feat-exit__link-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-features .feat-exit__link-desc {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  overflow-wrap: anywhere;
}

/* ---------- 窄屏保护 ---------- */
.page-features .feat-hero__title,
.page-features .feat-block__title,
.page-features .feat-combo__title {
  overflow-wrap: anywhere;
}

/* ---------- 断点 ---------- */
@media (min-width: 680px) {
  .page-features .feat-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--space-4);
  }
}

@media (min-width: 760px) {
  .page-features .feat-dials {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-features .feat-dial:nth-child(2) {
    margin-top: var(--space-6);
  }

  .page-features .feat-dial:nth-child(3) {
    margin-top: var(--space-3);
  }

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

  .page-features .feat-benefit__cell {
    padding: var(--space-3) var(--space-4) var(--space-3) 0;
    border-bottom: 0;
    border-right: var(--border-thin) dotted var(--color-line);
  }

  .page-features .feat-benefit__cell + .feat-benefit__cell {
    padding-left: var(--space-4);
  }

  .page-features .feat-benefit__cell:last-child {
    padding-right: 0;
    border-right: 0;
  }

  .page-features .feat-benefit__cell--gain {
    border-left: var(--border-thin) solid var(--color-primary);
  }

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

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

@media (min-width: 860px) {
  .page-features .feat-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--space-6);
  }

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

@media (min-width: 1000px) {
  .page-features .feat-body {
    grid-template-columns: var(--feat-rail-w) minmax(0, 1fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-features .feat-rail {
    position: sticky;
    top: var(--space-6);
  }

  .page-features .feat-combo {
    grid-template-columns: var(--feat-idx-w) minmax(0, 1fr) minmax(0, 1fr);
    column-gap: var(--space-3);
    align-items: baseline;
  }

  .page-features .feat-combo__idx {
    grid-row: 1 / -1;
  }

  .page-features .feat-combo__title {
    grid-column: 2;
  }

  .page-features .feat-combo__path,
  .page-features .feat-combo__text {
    grid-column: 3;
  }
}

@media (min-width: 1180px) {
  .page-features .feat-block__title {
    font-size: var(--text-4xl);
  }
}