.page-process {
  --pp-frame: calc(var(--border-thick) * 1.5);
  --pp-hard: 6px 6px 0 var(--color-surface-deep);
  display: block;
}

/* ---------- 顶部阅读进度条 ---------- */
.page-process .progress-rail {
  position: sticky;
  top: 0;
  z-index: 6;
  display: flex;
  gap: calc(var(--space-1) * 0.75);
  padding: var(--space-1) var(--gutter);
  background: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-process .progress-rail__seg {
  flex: 1 1 0;
  display: block;
  height: 5px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-deep);
  transition: background 160ms ease-out, height 160ms ease-out;
}

.page-process .progress-rail__seg:hover {
  background: var(--color-primary);
  height: 9px;
}

.page-process:has(#step-1:target) .progress-rail__seg:nth-child(1),
.page-process:has(#step-2:target) .progress-rail__seg:nth-child(2),
.page-process:has(#step-3:target) .progress-rail__seg:nth-child(3),
.page-process:has(#step-4:target) .progress-rail__seg:nth-child(4),
.page-process:has(#step-5:target) .progress-rail__seg:nth-child(5) {
  background: var(--color-accent);
}

/* ---------- 首屏 ---------- */
.page-process .hero-journey {
  padding-block: var(--space-6) var(--space-8);
  background: var(--color-surface);
}

.page-process .hero-journey__title {
  margin: var(--space-2) 0 0;
  max-width: 14ch;
  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);
}

.page-process .hero-journey__lede {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 横向旅程带 ---------- */
.page-process .jband {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  margin-block: var(--space-6) 0;
  border: var(--pp-frame) solid var(--color-primary);
  border-radius: var(--radius-lg);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  overflow: hidden;
}

.page-process .jband::after {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline-end: 0;
  width: clamp(64px, 14%, 150px);
  aspect-ratio: 1 / 1;
  background: var(--color-primary);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
  pointer-events: none;
  z-index: 0;
}

.page-process .jband__seg {
  position: relative;
  z-index: 1;
  display: block;
  padding: var(--space-3) var(--space-2);
  color: inherit;
  text-decoration: none;
  border-top: var(--pp-frame) solid var(--color-contrast-line);
  transition: background 160ms ease-out, transform 160ms ease-out;
}

.page-process .jband__seg:first-child {
  border-top: 0;
}

.page-process .jband__seg:hover,
.page-process .jband__seg:focus-visible {
  background: color-mix(in srgb, var(--color-contrast-accent) 16%, transparent);
  transform: translateY(-2px);
}

.page-process .jband__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-contrast-accent);
}

.page-process .jband__name {
  display: block;
  margin-top: var(--space-1);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
}

.page-process .jband__figure {
  display: block;
  margin-top: var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-contrast-accent);
}

.page-process .jband__figure em {
  font-style: normal;
  font-size: var(--text-lg);
  margin-inline-start: 2px;
  color: var(--color-contrast-ink);
}

.page-process .jband__sub {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
  opacity: 0.8;
}

.page-process .jband__dur {
  position: absolute;
  inset-block-start: var(--space-2);
  inset-inline-end: var(--space-2);
  padding: 2px var(--space-1);
  border-radius: var(--radius-pill);
  border: var(--border-thin) solid transparent;
  font-size: var(--text-xs);
  font-weight: 600;
  white-space: nowrap;
  transition: background 160ms ease-out, border-color 160ms ease-out, color 160ms ease-out;
}

.page-process .jband__dur--a {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-process .jband__dur--b {
  background: var(--color-highlight);
  color: var(--color-ink);
}

.page-process .jband__dur--c {
  background: var(--color-contrast-accent);
  color: var(--color-contrast-ink);
}

.page-process .jband__seg:hover .jband__dur,
.page-process .jband__seg:focus-visible .jband__dur {
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-color: var(--color-contrast-ink);
}

/* ---------- 环节区块 ---------- */
.page-process .step {
  padding-block: var(--section-y);
  background: var(--color-surface);
  scroll-margin-top: var(--space-8);
}

.page-process .step--alt {
  background: var(--color-surface-alt);
}

.page-process .step--contrast {
  padding-block: var(--section-y-lg);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-process .step__head {
  padding-top: var(--space-3);
  border-top: var(--pp-frame) solid var(--color-primary);
  margin-bottom: var(--space-6);
}

.page-process .step--contrast .step__head {
  border-top-color: var(--color-contrast-accent);
}

.page-process .step:target .step__head {
  border-top-color: var(--color-accent);
}

.page-process .step__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.16em;
  font-weight: 600;
  color: var(--color-primary);
}

.page-process .step--contrast .step__index {
  color: var(--color-contrast-accent);
}

.page-process .step__title {
  margin: var(--space-2) 0 var(--space-2);
  max-width: 22ch;
  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);
  color: inherit;
}

.page-process .step__meta {
  margin: 0;
  padding-inline-start: var(--space-2);
  border-inline-start: var(--border-thin) solid var(--color-primary);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-process .step--contrast .step__meta {
  border-inline-start-color: var(--color-contrast-accent);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.page-process .step__body {
  display: grid;
  gap: var(--space-6);
  align-items: start;
}

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

.page-process .step--contrast .step__copy {
  color: var(--color-contrast-ink);
}

.page-process .step__copy a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color 160ms ease-out;
}

.page-process .step__copy a:hover,
.page-process .step__copy a:focus-visible {
  color: var(--color-primary);
}

.page-process .step--contrast .step__copy a {
  color: var(--color-contrast-accent);
}

.page-process .step--contrast .step__copy a:hover,
.page-process .step--contrast .step__copy a:focus-visible {
  color: var(--color-highlight);
}

.page-process .step__callout {
  margin: var(--space-4) 0 var(--space-4);
  padding-inline-start: var(--space-3);
  border-inline-start: var(--pp-frame) solid var(--color-primary);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-lg);
  line-height: 1.45;
  color: var(--color-ink);
}

.page-process .step--contrast .step__callout {
  border-inline-start-color: var(--color-contrast-accent);
  color: var(--color-contrast-ink);
}

/* ---------- 字段列表 ---------- */
.page-process .step__facts {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  max-width: var(--measure);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-process .step__facts li {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.page-process .fact__k {
  font-weight: 600;
  color: var(--color-ink-muted);
}

.page-process .fact__v {
  color: var(--color-ink);
}

.page-process .step--contrast .step__facts {
  border-top-color: var(--color-contrast-line);
}

.page-process .step--contrast .step__facts li {
  border-bottom-color: var(--color-contrast-line);
}

.page-process .step--contrast .fact__k {
  color: var(--color-contrast-accent);
}

.page-process .step--contrast .fact__v {
  color: var(--color-contrast-ink);
}

/* ---------- 图片 ---------- */
.page-process .step__figure,
.page-process .step__wide {
  margin: 0;
}

.page-process .step__wide {
  margin-top: var(--space-6);
}

.page-process .step__figure img,
.page-process .step__wide img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.page-process .step--contrast .step__figure img,
.page-process .step--contrast .step__wide img {
  border-color: var(--color-contrast-line);
}

.page-process .step__figure figcaption,
.page-process .step__wide figcaption {
  margin-top: var(--space-2);
}

/* ---------- 结尾出口 ---------- */
.page-process .outro {
  padding-block: var(--section-y-lg);
  background: var(--color-primary-soft);
}

.page-process .outro__panel {
  padding: var(--space-6) var(--space-4);
  border: var(--pp-frame) solid var(--color-primary);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--pp-hard);
}

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

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

.page-process .outro__copy a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-process .outro__copy a:hover,
.page-process .outro__copy a:focus-visible {
  color: var(--color-primary);
}

.page-process .outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-process .step__facts li {
    grid-template-columns: 9ch minmax(0, 1fr);
    column-gap: var(--space-3);
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-process .step__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.62fr);
    gap: var(--space-8);
  }

  .page-process .step__body--single {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-process .outro__panel {
    padding: var(--space-8) var(--space-6);
  }
}

@media (min-width: 1000px) {
  .page-process .jband {
    grid-template-columns: repeat(7, 1fr);
  }

  .page-process .jband__seg {
    border-top: 0;
    border-inline-start: var(--pp-frame) solid var(--color-contrast-line);
    padding: var(--space-4) var(--space-3) var(--space-4);
  }

  .page-process .jband__seg:first-child {
    border-inline-start: 0;
  }

  .page-process .jband__seg--1 { grid-column: span 2; }
  .page-process .jband__seg--2 { grid-column: span 1; }
  .page-process .jband__seg--3 { grid-column: span 2; }
  .page-process .jband__seg--4 { grid-column: span 1; }
  .page-process .jband__seg--5 { grid-column: span 1; }

  .page-process .jband__seg--2 .jband__name,
  .page-process .jband__seg--4 .jband__name,
  .page-process .jband__seg--5 .jband__name {
    font-size: var(--text-base);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-process .jband__seg,
  .page-process .jband__dur,
  .page-process .progress-rail__seg,
  .page-process .step__copy a {
    transition: none;
  }

  .page-process .jband__seg:hover,
  .page-process .jband__seg:focus-visible {
    transform: none;
  }
}