.page-home {
  --home-frame-tick: 28px;
}

.page-home [hidden] {
  display: none !important;
}

/* ---------- 首屏框景 ---------- */
.page-home .home-hero {
  position: relative;
  background-color: var(--color-contrast-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-home .home-hero__frame {
  position: relative;
  overflow: hidden;
}

.page-home .home-hero__frame::before,
.page-home .home-hero__frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 8px;
  background-image: repeating-linear-gradient(
    to right,
    var(--color-contrast-line) 0 1px,
    transparent 1px var(--home-frame-tick)
  );
  z-index: 3;
  pointer-events: none;
}

.page-home .home-hero__frame::before {
  top: 0;
}

.page-home .home-hero__frame::after {
  bottom: 0;
}

.page-home .home-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.page-home .home-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(0.5) contrast(1.05);
}

.page-home .home-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--overlay-scrim);
}

.page-home .home-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  color: var(--color-contrast-ink);
}

.page-home .home-hero__eyebrow {
  margin: 0 0 var(--space-4);
  color: var(--color-contrast-ink);
  opacity: 0.76;
}

.page-home .home-hero__title {
  margin: 0 0 var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: calc(var(--leading-heading) * 0.76);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  max-width: 16ch;
}

.page-home .home-hero__lead {
  margin: 0 0 var(--space-6);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.9;
}

.page-home .hero-metrics {
  list-style: none;
  margin: 0;
  padding: var(--space-4) 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--space-3);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-home .hero-metrics__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.page-home .hero-metrics__num {
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-home .hero-metrics__item--signal .hero-metrics__num {
  color: var(--color-contrast-accent);
  border-bottom: var(--border-thin) solid var(--color-contrast-accent);
  padding-bottom: var(--space-1);
}

.page-home .hero-metrics__label {
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

.page-home .home-jump {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-home .home-jump a {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  padding-bottom: 2px;
  transition: color 140ms ease-out, border-color 140ms ease-out;
}

.page-home .home-jump a:hover,
.page-home .home-jump a:focus-visible {
  color: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
}

/* ---------- 通用分节 ---------- */
.page-home .home-lines,
.page-home .home-rounds,
.page-home .home-academy {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-home .section-head {
  margin-bottom: var(--space-6);
}

.page-home .section-head__index {
  margin: 0;
  color: var(--color-primary);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
}

.page-home .section-head__title {
  margin: var(--space-2) 0 0;
  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-home .section-head__note {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .filter-bar {
  margin-bottom: var(--space-6);
}

.page-home .filter-btn[aria-pressed="true"] {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.page-home .filter-empty {
  margin: var(--space-6) 0 0;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

/* ---------- 四条主线 ---------- */
.page-home .lines-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6) var(--space-4);
}

.page-home .line {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  padding-top: var(--space-3);
}

.page-home .line__tag {
  margin: 0;
  color: var(--color-ink-muted);
}

.page-home .line--a .line__tag {
  color: var(--color-primary);
}

.page-home .line__title {
  margin: 0;
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-home .line__figure {
  margin: var(--space-1) 0 0;
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-ink);
}

.page-home .line__figure-unit {
  margin-left: var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--weight-body);
  color: var(--color-ink-muted);
}

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

.page-home .line__meta {
  margin: 0;
  color: var(--color-ink-muted);
}

.page-home .line__link {
  align-self: flex-start;
  margin-top: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink);
  text-decoration: none;
  border: var(--border-thin) solid var(--color-line);
  transition: background-color 140ms ease-out, color 140ms ease-out, border-color 140ms ease-out;
}

.page-home .line__link:hover,
.page-home .line__link:focus-visible {
  background-color: var(--color-contrast-surface);
  border-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-home .lines-media {
  margin: var(--space-8) 0 0;
}

.page-home .media-frame img {
  width: 100%;
  height: auto;
  display: block;
  filter: saturate(0.6);
}

/* ---------- 轮次索引 ---------- */
.page-home .round-board {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-home .round-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-3) var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
  transition: background-color 140ms ease-out;
}

.page-home .round-row:hover {
  background-color: var(--color-surface-alt);
}

.page-home .round-row__label {
  margin: 0;
  color: var(--color-ink-muted);
}

.page-home .round-row--active .round-row__label {
  color: var(--color-primary);
}

.page-home .round-row__scale {
  height: 22px;
  border-bottom: var(--border-thin) solid var(--color-line);
  background-image: repeating-linear-gradient(
    to right,
    var(--color-line) 0 1px,
    transparent 1px 100%
  );
  background-size: calc(100% / 30) 12px;
  background-repeat: repeat-x;
  background-position: left bottom;
  transition: background-image 140ms ease-out;
}

.page-home .round-row:hover .round-row__scale,
.page-home .round-row--active .round-row__scale {
  background-image: repeating-linear-gradient(
    to right,
    var(--color-primary) 0 1px,
    transparent 1px 100%
  );
}

.page-home .round-row__meta {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-home .rounds-note {
  margin: var(--space-4) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 青训年龄组 ---------- */
.page-home .academy-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-home .academy-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-home .age-slot {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-4) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-home .age-slot:last-child {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-home .age-slot__code {
  margin: 0;
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 0.92;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-home .age-slot__name {
  margin: 0 0 var(--space-1);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-home .age-slot__desc {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .age-slot__metrics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  margin: var(--space-2) 0 0;
}

.page-home .age-slot__metrics > div {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
}

.page-home .age-slot__metrics dt {
  color: var(--color-ink-muted);
}

.page-home .age-slot__metrics dd {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.page-home .academy-media {
  margin: 0;
}

/* ---------- 数据指标 ---------- */
.page-home .metric-board {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--space-6) var(--space-3);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--space-3);
}

.page-home .metric-cell {
  border-top: var(--border-thin) solid var(--color-contrast-line);
  padding-top: var(--space-2);
}

.page-home .metric-cell__value {
  margin: 0 0 var(--space-1);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-contrast-ink);
}

.page-home .metric-cell__label {
  margin: 0;
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

.page-home .metric-note {
  margin: var(--space-4) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .metric-note a {
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary);
  padding-bottom: 1px;
  transition: color 140ms ease-out;
}

.page-home .metric-note a:hover,
.page-home .metric-note a:focus-visible {
  color: var(--color-primary);
}

/* ---------- 更新节奏 ---------- */
.page-home .cadence-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-home .cadence-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-home .cadence-step {
  padding: var(--space-4) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-home .cadence-step:last-child {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-home .cadence-step__index {
  margin: 0 0 var(--space-1);
  color: var(--color-primary);
}

.page-home .cadence-step__title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-home .cadence-step__desc {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-home .cadence-media {
  margin: 0;
}

.page-home .cadence-contact {
  margin-top: var(--space-6);
  padding: var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-4);
  align-items: baseline;
  justify-content: space-between;
}

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

.page-home .cadence-contact__link {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink);
  text-decoration: none;
  border: var(--border-thin) solid var(--color-line);
  transition: background-color 140ms ease-out, color 140ms ease-out, border-color 140ms ease-out;
}

.page-home .cadence-contact__link:hover,
.page-home .cadence-contact__link:focus-visible {
  background-color: var(--color-contrast-surface);
  border-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-home .hero-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-home .metric-board {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    padding: var(--space-6);
  }

  .page-home .age-slot {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: var(--space-4);
  }
}

@media (min-width: 720px) {
  .page-home .round-row {
    grid-template-columns: minmax(0, 2fr) minmax(0, 7fr) minmax(0, 3fr);
    align-items: center;
    gap: var(--space-4);
  }
}

@media (min-width: 900px) {
  .page-home .lines-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    grid-auto-flow: dense;
  }

  .page-home .line--a {
    grid-column: span 7;
  }

  .page-home .line--b {
    grid-column: span 5;
  }

  .page-home .line--c {
    grid-column: span 5;
  }

  .page-home .line--d {
    grid-column: span 7;
  }
}

@media (min-width: 960px) {
  .page-home .academy-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: var(--space-8);
  }

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