.page-network {
  --net-muted: var(--color-ink-muted);
  --net-ease: 120ms linear;
}

.page-network .net-link {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: background-color var(--net-ease), color var(--net-ease);
}

.page-network .net-link:hover {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border-bottom-color: transparent;
}

/* ---------- 首屏 ---------- */

.page-network .net-hero {
  position: relative;
  overflow: hidden;
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-network .net-hero__inner {
  position: relative;
  z-index: 1;
}

.page-network .net-hero__crumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0 0 var(--space-6);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
}

.page-network .net-hero__crumb a {
  color: var(--color-primary-ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--net-ease);
}

.page-network .net-hero__crumb a:hover {
  border-bottom-color: var(--color-primary-ink);
}

.page-network .net-hero__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-network .net-hero__kicker {
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  font-family: var(--font-mono);
}

.page-network .net-hero__title {
  margin: 0 0 var(--space-4);
  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);
}

.page-network .net-hero__lead {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
}

.page-network .net-hero__mark {
  position: relative;
  min-height: 180px;
  background: var(--color-accent);
  clip-path: polygon(34% 0, 100% 0, 100% 100%, 0 100%);
}

.page-network .net-hero__mark::after {
  content: "";
  position: absolute;
  inset: auto 12% 8% 8%;
  height: 46%;
  background: var(--color-contrast-surface);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 62%);
}

.page-network .net-hero__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--space-3);
  margin-top: var(--space-8);
}

.page-network .net-fig {
  display: block;
}

.page-network .net-fig__value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
}

.page-network .net-fig__unit {
  margin-left: 0.25em;
  font-size: var(--text-lg);
  font-weight: 700;
}

.page-network .net-fig__label {
  display: block;
  margin-top: var(--space-2);
  max-width: 15ch;
  font-size: var(--text-sm);
  line-height: 1.5;
}

/* ---------- 阶段索引条 ---------- */

.page-network .net-progress {
  position: sticky;
  top: 0;
  z-index: 6;
  background: var(--color-surface-deep);
  color: var(--color-ink);
}

.page-network .net-progress__list {
  display: flex;
  gap: var(--space-1);
  margin: 0;
  padding: var(--space-2) 0;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-network .net-progress__node {
  flex: 0 0 auto;
}

.page-network .net-progress__link {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  color: var(--color-ink);
  text-decoration: none;
  transition: background-color var(--net-ease), color var(--net-ease);
}

.page-network .net-progress__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
}

.page-network .net-progress__name {
  font-size: var(--text-sm);
  font-weight: 600;
}

.page-network .net-progress__link:hover {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-network .net-progress__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-network .net-progress__node.is-current .net-progress__link {
  background: var(--color-focus);
  color: var(--color-accent-ink);
}

/* ---------- 阶段区块 ---------- */

.page-network .net-stage {
  background: var(--color-surface);
  color: var(--color-ink);
}

.page-network .net-stage--live {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  --net-muted: color-mix(in srgb, var(--color-primary-ink) 72%, var(--color-primary));
}

.page-network .net-stage--post {
  background: var(--color-surface-alt);
  color: var(--color-ink);
}

.page-network .net-stage--season {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  --net-muted: color-mix(in srgb, var(--color-contrast-ink) 66%, var(--color-contrast-surface));
}

.page-network .net-stage__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-network .net-stage__step {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--net-muted);
}

.page-network .net-stage__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.page-network .net-stage__time {
  display: inline-block;
  margin: 0 0 var(--space-3);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--color-surface-deep);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
}

.page-network .net-stage--live .net-stage__time,
.page-network .net-stage--season .net-stage__time {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-accent);
}

.page-network .net-stage--post .net-stage__time {
  background: var(--color-highlight);
}

.page-network .net-stage__note {
  margin: 0;
  max-width: 32ch;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--net-muted);
}

/* ---------- 环节 ---------- */

.page-network .net-stage__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.page-network .net-task__num {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.16em;
}

.page-network .net-task__title {
  margin: 0 0 var(--space-4);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
}

.page-network .net-task__facts {
  margin: 0 0 var(--space-4);
}

.page-network .net-task__facts > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1);
  padding: var(--space-3) 0;
  background: linear-gradient(90deg, var(--color-surface-deep) 0%, transparent 100%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

.page-network .net-stage--live .net-task__facts > div {
  background: none;
  padding-left: 0;
}

.page-network .net-stage--season .net-task__facts > div {
  background: none;
}

.page-network .net-task__facts dt {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--net-muted);
}

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

.page-network .net-time {
  font-family: var(--font-mono);
  font-weight: 700;
}

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

/* ---------- 图片 ---------- */

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

.page-network .net-frame__inner {
  display: block;
  width: 100%;
  aspect-ratio: 10 / 7;
  overflow: hidden;
  background: var(--color-surface-deep);
}

.page-network .net-frame__inner--wide {
  aspect-ratio: 2 / 1;
}

.page-network .net-frame__inner--tall {
  aspect-ratio: 3 / 2;
}

.page-network .net-frame__inner img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-network .net-frame__caption {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--net-muted);
}

/* ---------- 下一步 ---------- */

.page-network .net-next {
  background: var(--color-surface);
  color: var(--color-ink);
}

.page-network .net-next__heading {
  margin: 0 0 var(--space-6);
  max-width: 24ch;
  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-network .net-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

.page-network .net-next__card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-surface-alt);
  transition: background-color var(--net-ease), color var(--net-ease);
}

.page-network .net-next__card:hover {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-network .net-next__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--net-muted);
}

.page-network .net-next__card:hover .net-next__label {
  color: var(--color-primary-ink);
}

.page-network .net-next__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
}

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

.page-network .net-next__link {
  margin-top: auto;
  padding-top: var(--space-3);
  color: inherit;
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  align-self: flex-start;
  transition: background-color var(--net-ease), color var(--net-ease);
}

.page-network .net-next__card:hover .net-next__link {
  border-bottom-color: transparent;
  background: var(--color-primary-ink);
  color: var(--color-primary);
  padding-left: var(--space-1);
  padding-right: var(--space-1);
}

.page-network .net-next__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 平板与桌面 ---------- */

@media (min-width: 760px) {
  .page-network .net-hero__top {
    grid-template-columns: minmax(0, 5fr) minmax(0, 2fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-network .net-hero__mark {
    min-height: 320px;
  }

  .page-network .net-hero__figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-network .net-fig:nth-child(2) {
    transform: translateY(var(--space-3));
  }

  .page-network .net-fig:nth-child(3) {
    transform: translateY(var(--space-6));
  }

  .page-network .net-fig:nth-child(4) {
    transform: translateY(calc(var(--space-6) + var(--space-3)));
  }

  .page-network .net-task__facts > div {
    grid-template-columns: 7em minmax(0, 1fr);
    gap: var(--space-3);
    padding: var(--space-3) var(--space-3) var(--space-3) 0;
  }

  .page-network .net-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-3);
  }
}

@media (min-width: 980px) {
  .page-network .net-stage__grid {
    grid-template-columns: minmax(0, 2fr) minmax(0, 5fr);
    gap: var(--space-8);
  }

  .page-network .net-stage__aside {
    position: sticky;
    top: calc(var(--space-8) + var(--space-2));
    align-self: start;
  }

  .page-network .net-frame--right {
    margin-left: auto;
    max-width: 560px;
  }

  .page-network .net-frame--left {
    max-width: 480px;
  }

  .page-network .net-frame--wide {
    max-width: none;
  }

  .page-network .net-frame--narrow {
    max-width: 440px;
  }
}
<<<END>>>