/* ============ 页面作用域变量 ============ */
.page-process {
  --proc-rail: 18px;
  --proc-dot: 19px;
  --proc-indent: 52px;
  --proc-branch: 46px;
}

/* ============ 首屏 ============ */
.page-process .process-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-process .process-hero__grid {
  display: grid;
  gap: var(--space-6);
  padding-block: var(--space-6) var(--space-8);
}

.page-process .process-hero .breadcrumb {
  margin-bottom: var(--space-4);
  font-size: var(--text-xs);
}

.page-process .process-hero .breadcrumb a,
.page-process .process-hero .breadcrumb span {
  color: var(--color-contrast-ink);
  opacity: 0.66;
  text-decoration: none;
}

.page-process .process-hero .breadcrumb a:hover {
  opacity: 1;
}

.page-process .process-hero__eyebrow {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
}

.page-process .process-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: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  max-width: 16ch;
}

.page-process .process-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

.page-process .process-hero__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-process .process-hero__figures .metric__value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 700;
  line-height: 1;
  color: var(--color-contrast-accent);
}

.page-process .process-hero__figures .metric__label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
}

.page-process .process-hero__figures .metric__note {
  display: block;
  margin-top: 2px;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-contrast-ink);
  opacity: 0.58;
}

.page-process .process-hero__scale {
  height: 26px;
  margin-top: var(--space-6);
  border-bottom: var(--border-thin) solid var(--color-contrast-accent);
  background-image: repeating-linear-gradient(
    90deg,
    var(--color-contrast-line) 0,
    var(--color-contrast-line) 1px,
    transparent 1px,
    transparent 26px
  );
}

.page-process .process-hero__visual {
  margin: 0;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-contrast-surface);
}

.page-process .process-hero__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

.page-process .process-hero__caption {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-contrast-ink);
  opacity: 0.6;
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

@media (min-width: 560px) {
  .page-process .process-hero__figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-process .process-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: var(--space-8);
    align-items: end;
    padding-block: var(--section-y-lg);
  }
  .page-process .process-hero__scale {
    margin-top: var(--space-8);
  }
}

/* ============ 时间轴区块 ============ */
.page-process .process-track__head {
  max-width: 62ch;
  margin-bottom: var(--space-6);
}

.page-process .process-track__title {
  margin: var(--space-2) 0 var(--space-3);
  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-process .process-track__lead {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---- 轴线 ---- */
.page-process .timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-process .timeline::before {
  content: "";
  position: absolute;
  top: var(--space-2);
  bottom: var(--space-2);
  left: var(--proc-rail);
  width: 1px;
  background: var(--color-line);
}

/* ---- 分组标题 ---- */
.page-process .timeline__group {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-3) 0 var(--space-4) var(--proc-indent);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-process .timeline__group-index {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-process .timeline__group-name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
}

.page-process .timeline__group-note {
  flex-basis: 100%;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

/* ---- 节点 ---- */
.page-process .timeline__item {
  position: relative;
  padding-left: var(--proc-indent);
  padding-bottom: var(--space-6);
}

.page-process .timeline__dot {
  position: absolute;
  top: 4px;
  left: calc(var(--proc-rail) - var(--proc-dot) / 2);
  width: var(--proc-dot);
  height: var(--proc-dot);
  box-sizing: border-box;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}

.page-process .timeline__item--figure .timeline__dot {
  border-color: var(--color-accent);
}

.page-process .timeline__node {
  padding: var(--space-4);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color 180ms ease;
}

.page-process .timeline__node:hover,
.page-process .timeline__node:focus-within {
  border-color: var(--color-primary);
}

.page-process .timeline__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.page-process .timeline__index {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-accent);
}

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

.page-process .timeline__summary {
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---- 节点内折叠 ---- */
.page-process .timeline__node .accordion {
  border-top: var(--border-thin) solid var(--color-line);
  padding-top: var(--space-1);
}

.page-process .timeline__node .accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) 0;
  border: 0;
  background: none;
  text-align: left;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
}

.page-process .timeline__node .accordion__trigger:hover {
  color: var(--color-accent);
}

.page-process .timeline__node .accordion__trigger:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-process .timeline__node .accordion__panel p {
  margin: var(--space-1) 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.9;
  color: var(--color-ink-soft);
}

/* ---- 时间轴上的图 ---- */
.page-process .process-figure {
  margin: 0;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface-alt);
}

.page-process .process-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-process .process-figure figcaption {
  padding: var(--space-2) var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

/* ---- 桌面端：左右错位 ---- */
@media (min-width: 960px) {
  .page-process .timeline::before {
    left: 50%;
  }

  .page-process .timeline__group {
    padding-left: 0;
    justify-content: center;
    text-align: center;
  }

  .page-process .timeline__group-note {
    flex-basis: auto;
  }

  .page-process .timeline__item {
    width: calc(50% - var(--proc-branch));
    padding-left: 0;
  }

  .page-process .timeline__item--left {
    margin-right: auto;
  }

  .page-process .timeline__item--right {
    margin-left: auto;
  }

  .page-process .timeline__dot {
    top: 6px;
    left: auto;
  }

  .page-process .timeline__item--left .timeline__dot {
    left: 100%;
    margin-left: calc(var(--proc-branch) - var(--proc-dot) / 2);
  }

  .page-process .timeline__item--right .timeline__dot {
    left: calc(-1 * var(--proc-branch) - var(--proc-dot) / 2);
  }

  .page-process .timeline__item--full {
    width: 100%;
    padding-left: 0;
    margin-right: 0;
    margin-left: 0;
  }

  .page-process .timeline__item--full .timeline__dot {
    left: 50%;
    margin-left: calc(var(--proc-dot) / -2);
  }

  .page-process .process-figure--wide img {
    aspect-ratio: 5 / 2;
  }
}

@media (min-width: 1200px) {
  .page-process .timeline__node {
    padding: var(--space-4) var(--space-6);
  }
}

/* ============ 行动出口 ============ */
.page-process .process-outro__grid {
  display: grid;
  gap: var(--space-6);
}

.page-process .process-outro__title {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
  max-width: 22ch;
}

.page-process .process-outro__text {
  margin: 0 0 var(--space-4);
  max-width: 52ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.page-process .process-outro__links {
  display: flex;
  flex-direction: column;
}

.page-process .process-outro__link {
  display: block;
  padding: var(--space-3) 0;
  border-top: var(--border-thin) solid var(--color-contrast-line);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-contrast-ink);
  text-decoration: none;
  transition: color 160ms ease;
}

.page-process .process-outro__link:last-child {
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-process .process-outro__link span {
  display: block;
  margin-top: 3px;
  font-size: var(--text-sm);
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-contrast-ink);
  opacity: 0.6;
}

.page-process .process-outro__link:hover,
.page-process .process-outro__link:focus-visible {
  color: var(--color-contrast-accent);
}

.page-process .process-outro__link:hover span,
.page-process .process-outro__link:focus-visible span {
  color: var(--color-contrast-accent);
}

.page-process .process-outro__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

@media (min-width: 900px) {
  .page-process .process-outro__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
    gap: var(--space-8);
    align-items: start;
  }
}
<<<END>>>