.page-network {
  --net-axis-min: 960px;
  --net-mark-w: 168px;
}

.page-network .crumbs {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  padding: var(--space-3) 0 var(--space-1);
}

.page-network .crumbs a {
  color: var(--color-accent);
}

/* ── 首屏暗色块 ───────────────────────────── */

.page-network .net-hero {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-top: var(--space-6);
}

.page-network .net-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: end;
}

.page-network .net-hero__lead .display-title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  margin: var(--space-3) 0 var(--space-4);
}

.page-network .net-hero__lede {
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
  max-width: 46ch;
  margin: 0;
}

.page-network .tag--onDeep {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-network .net-hero__shot {
  margin: 0;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-network .net-hero__shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-network .net-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
  }
}

/* ── 四个关键数字 ─────────────────────────── */

.page-network .net-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--border-thin);
  background: var(--color-contrast-line);
  border: var(--border-thin) solid var(--color-contrast-line);
  margin: var(--space-8) 0 0;
  padding: 0;
}

.page-network .net-stats__item {
  background: var(--color-contrast-surface);
  padding: var(--space-3) var(--space-2);
  margin: 0;
}

.page-network .net-stats__label {
  font-size: var(--text-xs);
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
  margin-bottom: var(--space-1);
}

.page-network .net-stats__num {
  font-size: var(--text-figure);
  line-height: 1.05;
  color: var(--color-contrast-accent);
  font-family: var(--font-mono);
  margin: 0;
  word-break: keep-all;
}

@media (min-width: 640px) {
  .page-network .net-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-network .net-stats__item {
    padding: var(--space-4) var(--space-3);
  }
}

/* ── 横向时间带 ───────────────────────────── */

.page-network .time-band {
  margin-top: var(--space-8);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  padding-top: var(--space-4);
}

.page-network .time-band__caption {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  color: var(--color-contrast-ink);
  margin: 0 0 var(--space-6);
}

.page-network .time-band__scroll {
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: var(--space-2);
}

.page-network .time-band__inner {
  position: relative;
  min-width: var(--net-axis-min);
  padding-top: var(--space-1);
}

.page-network .time-band__axis {
  position: absolute;
  left: 0;
  right: 0;
  top: 12px;
  height: 1px;
  background: linear-gradient(
    90deg,
    var(--color-contrast-accent) 0%,
    var(--color-contrast-accent) 26%,
    var(--color-contrast-line) 55%,
    var(--color-contrast-line) 100%
  );
}

.page-network .time-band__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  height: 148px;
}

.page-network .time-band__mark {
  position: absolute;
  top: 0;
  width: var(--net-mark-w);
  transform: translateX(-50%);
  text-align: center;
  outline-offset: 4px;
}

.page-network .time-band__mark:nth-child(1) {
  left: 0;
  transform: none;
  text-align: left;
}

.page-network .time-band__mark:nth-child(2) {
  left: 33.33%;
}

.page-network .time-band__mark:nth-child(3) {
  left: 75%;
}

.page-network .time-band__mark:nth-child(4) {
  left: 100%;
  transform: translateX(-100%);
  text-align: right;
}

.page-network .time-band__dot {
  display: block;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--color-contrast-surface);
  border: var(--border-thin) solid var(--color-contrast-accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-contrast-accent) 16%, transparent);
  transition: background-color 160ms ease, box-shadow 160ms ease;
}

.page-network .time-band__mark:nth-child(1) .time-band__dot {
  margin-left: 0;
}

.page-network .time-band__mark:nth-child(2) .time-band__dot,
.page-network .time-band__mark:nth-child(3) .time-band__dot {
  margin: 0 auto;
}

.page-network .time-band__mark:nth-child(4) .time-band__dot {
  margin-left: auto;
  margin-right: 0;
}

.page-network .time-band__time {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  letter-spacing: 0.02em;
}

.page-network .time-band__text {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  line-height: 1.55;
  color: color-mix(in srgb, var(--color-contrast-ink) 60%, transparent);
  transition: color 160ms ease;
}

.page-network .time-band__mark:hover .time-band__dot,
.page-network .time-band__mark:focus .time-band__dot {
  background: var(--color-contrast-accent);
  box-shadow: 0 0 0 7px color-mix(in srgb, var(--color-contrast-accent) 26%, transparent);
}

.page-network .time-band__mark:hover .time-band__text,
.page-network .time-band__mark:focus .time-band__text {
  color: var(--color-contrast-ink);
}

.page-network .time-band__mark:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 6px;
}

/* ── 三种日子 ─────────────────────────────── */

.page-network .net-days {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-network .net-days__item {
  border-top: var(--border-thin) solid var(--color-line);
  padding-top: var(--space-3);
}

.page-network .net-days__no {
  display: inline-block;
  font-size: var(--text-sm);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  padding: 2px var(--space-1);
  border-radius: var(--radius-sm);
  line-height: 1.3;
}

.page-network .net-days__title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-2);
}

.page-network .net-days__text {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-2);
}

@media (min-width: 800px) {
  .page-network .net-days {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    margin-top: var(--space-8);
  }

  .page-network .net-days__item {
    border-top: 0;
    border-left: var(--border-thin) solid var(--color-line);
    padding: 0 var(--space-4);
  }

  .page-network .net-days__item:first-child {
    border-left: 0;
    padding-left: 0;
  }

  .page-network .net-days__item:last-child {
    padding-right: 0;
  }
}

/* ── 两条通道 ─────────────────────────────── */

.page-network .net-chan {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: var(--space-6);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-network .net-chan__col {
  border-bottom: var(--border-thin) solid var(--color-line);
  padding: var(--space-4) 0;
}

.page-network .net-chan__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.page-network .net-chan__no {
  font-size: var(--text-sm);
  color: var(--color-primary);
  letter-spacing: 0.06em;
}

.page-network .net-chan__name {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: 0;
}

.page-network .net-chan__rows {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
}

.page-network .net-chan__rows dt {
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.04em;
  margin-top: var(--space-2);
}

.page-network .net-chan__rows dt:first-of-type {
  margin-top: 0;
}

.page-network .net-chan__rows dd {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-network .net-chan__fig {
  margin: var(--space-6) 0 0;
}

.page-network .net-chan__fig img,
.page-network .net-support__fig img,
.page-network .net-reach__fig img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  object-fit: cover;
}

.page-network .net-chan__fig .media__caption,
.page-network .net-support__fig .media__caption {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  line-height: 1.6;
}

.page-network .net-bridge {
  margin: var(--space-6) 0 0;
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-primary);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-network .net-bridge a {
  color: var(--color-accent);
  text-underline-offset: 3px;
}

@media (min-width: 860px) {
  .page-network .net-chan {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-top: var(--border-thin) solid var(--color-line);
  }

  .page-network .net-chan__col {
    padding: var(--space-4) var(--space-4) var(--space-4) 0;
  }

  .page-network .net-chan__col + .net-chan__col {
    border-left: var(--border-thin) solid var(--color-line);
    padding-left: var(--space-4);
    padding-right: 0;
  }
}

/* ── 三级支持 ─────────────────────────────── */

.page-network .net-support {
  margin-top: var(--space-6);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-network .net-support .fold {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-network .net-support .fold__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  background: transparent;
  border: 0;
  padding: var(--space-3) 0;
  text-align: left;
  cursor: pointer;
  color: var(--color-ink);
}

.page-network .net-support .fold__no {
  display: inline-block;
  min-width: 34px;
  padding: 2px var(--space-1);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-align: center;
  border-radius: var(--radius-sm);
  line-height: 1.4;
}

.page-network .net-fold__ttl {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
}

.page-network .net-support .fold__body {
  padding: 0 0 var(--space-4) calc(34px + var(--space-3));
}

.page-network .net-fold__rows {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
}

.page-network .net-fold__rows dt {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.04em;
  margin-top: var(--space-2);
}

.page-network .net-fold__rows dt:first-of-type {
  margin-top: 0;
}

.page-network .net-fold__rows dd {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  max-width: var(--measure);
}

.page-network .net-support__fig {
  margin: var(--space-6) 0 0;
}

@media (min-width: 720px) {
  .page-network .net-fold__rows {
    grid-template-columns: 8rem minmax(0, 1fr);
    column-gap: var(--space-3);
    align-items: baseline;
  }

  .page-network .net-fold__rows dt {
    margin-top: var(--space-2);
  }

  .page-network .net-fold__rows dt:first-of-type {
    margin-top: 0;
  }
}

/* ── 覆盖范围 ─────────────────────────────── */

.page-network .net-reach {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.page-network .net-reach__fig {
  margin: 0;
}

.page-network .net-reach__lead {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  line-height: 1.5;
  color: var(--color-ink);
  margin: 0 0 var(--space-4);
  max-width: 40ch;
}

.page-network .net-reach__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-network .net-reach__list > li {
  border-top: var(--border-thin) solid var(--color-line);
  padding: var(--space-3) 0;
}

.page-network .net-reach__k {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-primary);
  margin: 0 0 var(--space-1);
}

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

@media (min-width: 860px) {
  .page-network .net-reach {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-8);
    align-items: start;
  }
}

/* ── 出口 ─────────────────────────────────── */

.page-network .net-exit {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: start;
}

.page-network .net-exit__ttl {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
  margin: 0 0 var(--space-3);
}

.page-network .net-exit__text {
  color: color-mix(in srgb, var(--color-contrast-ink) 80%, transparent);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  max-width: var(--measure);
  margin: 0 0 var(--space-3);
}

.page-network .net-exit__text a {
  color: var(--color-contrast-accent);
  text-underline-offset: 3px;
}

.page-network .net-exit__act .btn--solid {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-base);
  text-decoration: none;
}

.page-network .net-exit__act .btn--solid:hover,
.page-network .net-exit__act .btn--solid:focus-visible {
  background: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
}

.page-network .net-exit__hint {
  margin: var(--space-3) 0 0;
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

@media (min-width: 860px) {
  .page-network .net-exit {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-network .time-band__dot,
  .page-network .time-band__text {
    transition: none;
  }
}