.page-features {
  --feat-wm-ink: color-mix(in srgb, var(--color-ink) 8%, transparent);
  --feat-mark-w: var(--space-3);
}

/* ---------- 首屏 ---------- */

.page-features .feat-hero {
  padding-block: var(--space-6) var(--space-4);
}

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

.page-features .feat-hero-title {
  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-ink);
  margin-block: var(--space-3) var(--space-4);
}

.page-features .feat-hero-lead {
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-features .feat-board {
  padding: var(--space-6);
}

.page-features .feat-board .contrast-figure {
  margin-block: var(--space-2) var(--space-3);
  line-height: 1;
}

.page-features .feat-hero-figure {
  margin-top: var(--space-6);
}

.page-features .feat-hero-figure .figure-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 分组筛选 ---------- */

.page-features .feat-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding-block: var(--space-4) 0;
}

.page-features .feat-filter-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  margin-inline-end: var(--space-2);
}

.page-features .feat-filter .filter-status {
  flex-basis: 100%;
  margin-block: var(--space-2) 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

/* ---------- 分组 ---------- */

.page-features .feat-group {
  padding-block: var(--space-8) 0;
}

.page-features .feat-group--tinted {
  background: var(--color-surface-alt);
  padding-block: var(--space-8);
}

.page-features .feat-group-head {
  position: relative;
  max-width: var(--measure);
  margin-bottom: var(--space-8);
}

.page-features .feat-watermark {
  position: absolute;
  inset-inline-end: 0;
  top: -0.35em;
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  line-height: 1;
  color: var(--color-ink);
  opacity: 0.07;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}

.page-features .feat-group-title {
  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);
  color: var(--color-ink);
  margin-block: var(--space-2) var(--space-3);
}

.page-features .feat-group-summary {
  color: var(--color-ink-soft);
}

.page-features .feat-group-summary a {
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary);
}

.page-features .feat-group-summary a:hover {
  background: var(--color-primary-soft);
}

/* ---------- 条目流 ---------- */

.page-features .feat-flow {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.page-features .feat-item {
  width: 100%;
  padding-block: var(--space-2);
}

.page-features .feat-item-title {
  display: flex;
  align-items: center;
  gap: 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);
  margin-bottom: var(--space-2);
}

.page-features .feat-item-desc {
  max-width: var(--measure);
  color: var(--color-ink-soft);
  margin-bottom: var(--space-3);
}

.page-features .feat-points {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-4);
  display: grid;
  gap: var(--space-1);
}

.page-features .feat-points li {
  position: relative;
  padding-inline-start: var(--space-6);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-features .feat-points li::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: calc(var(--space-3) / 2);
  width: var(--feat-mark-w);
  height: var(--border-thin);
  background: var(--color-primary);
}

.page-features .feat-points a {
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features .feat-points a:hover {
  background: var(--color-primary-soft);
  border-bottom-color: var(--color-accent);
}

/* ---------- 适用与不适用对照 ---------- */

.page-features .feat-scope {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

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

.page-features .scope-item--yes {
  border-inline-start-color: var(--color-primary);
}

.page-features .scope-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-features .scope-item--yes .scope-tag {
  color: var(--color-primary);
}

.page-features .scope-item p {
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
}

/* ---------- 图片 ---------- */

.page-features .feat-figure {
  width: 100%;
}

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

/* ---------- 边界说明 ---------- */

.page-features .feat-limits {
  padding-block: var(--space-8) var(--space-8);
}

.page-features .feat-limits-block {
  padding: var(--space-6);
}

.page-features .feat-limits-title {
  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);
  margin-block: var(--space-2) var(--space-4);
}

.page-features .feat-limits-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-3);
}

.page-features .feat-limits-list li {
  position: relative;
  padding-inline-start: var(--space-6);
  color: var(--color-contrast-ink);
  opacity: 0.86;
  line-height: var(--leading-body);
  font-size: var(--text-sm);
}

.page-features .feat-limits-list li::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: calc(var(--space-3) / 2);
  width: var(--feat-mark-w);
  height: var(--border-thin);
  background: var(--color-contrast-accent);
}

.page-features .feat-limits-list strong {
  color: var(--color-contrast-ink);
  font-weight: var(--weight-heading);
}

/* ---------- 中屏 ---------- */

@media (min-width: 620px) {
  .page-features .feat-scope {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-features .feat-hero {
    padding-block: var(--space-8) var(--space-6);
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 780px) {
  .page-features .feat-hero {
    padding-block: var(--section-y-lg) var(--section-y);
  }

  .page-features .feat-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-features .feat-hero-aside {
    margin-top: var(--space-8);
  }

  .page-features .feat-group {
    padding-block: var(--section-y) 0;
  }

  .page-features .feat-group--tinted {
    padding-block: var(--section-y);
  }

  .page-features .feat-group:last-of-type {
    padding-bottom: var(--section-y);
  }

  .page-features .feat-item {
    width: 62%;
  }

  .page-features .feat-item--right {
    margin-inline-start: auto;
  }

  .page-features .feat-figure {
    width: 48%;
  }

  .page-features .feat-figure--left {
    margin-inline-end: auto;
  }

  .page-features .feat-figure--right {
    margin-inline-start: auto;
  }

  .page-features .feat-figure--wide {
    width: 54%;
  }

  .page-features .feat-figure--tall {
    width: 34%;
  }

  .page-features .feat-limits {
    padding-block: var(--section-y) var(--space-8);
  }

  .page-features .feat-limits-block {
    padding: var(--space-8);
  }
}

/* ---------- 宽屏 ---------- */

@media (min-width: 1080px) {
  .page-features .feat-flow {
    gap: var(--space-8) var(--space-6);
  }

  .page-features .feat-item {
    width: 58%;
  }

  .page-features .feat-figure--tall {
    width: 30%;
  }
}

/* ---------- 减少动态 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-features * {
    transition: none !important;
    animation: none !important;
  }
}