.page-help .section[id] {
  scroll-margin-top: 90px;
}

/* ---------- 首屏 ---------- */
.page-help .help-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--space-8) + var(--space-2)) 0 var(--section-y-lg);
  background:
    radial-gradient(circle at 82% 8%, color-mix(in srgb, var(--color-primary) 30%, transparent) 0%, transparent 56%),
    radial-gradient(circle at 4% 92%, color-mix(in srgb, var(--color-accent) 10%, transparent) 0%, transparent 52%);
}

.page-help .breadcrumbs {
  margin-bottom: var(--space-6);
}

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

.page-help .hero-kicker {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.page-help .hero-title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-help .hero-lead {
  margin: 0;
  max-width: 42ch;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-help .hero-flows {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.page-help .hero-flow {
  display: block;
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-surface-deep) 58%, transparent);
  text-decoration: none;
  color: var(--color-ink);
  transition: border-color 0.22s ease, box-shadow 0.22s ease, transform 0.22s ease;
}

.page-help .hero-flow:hover,
.page-help .hero-flow:focus-visible {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-2);
  transform: translateY(-3px);
}

.page-help .flow-mark {
  display: block;
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  line-height: 0.86;
  letter-spacing: -0.04em;
  color: var(--color-primary);
}

.page-help .flow-name {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: 1.45;
  color: var(--color-ink);
}

.page-help .flow-sub {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  letter-spacing: -0.01em;
}

.page-help .hero-flow:nth-child(1) .flow-mark {
  font-size: var(--text-figure);
  color: var(--color-accent);
}

.page-help .hero-flow:nth-child(2) .flow-mark {
  font-size: calc(var(--text-figure) * 0.72);
  color: var(--color-primary);
}

.page-help .hero-flow:nth-child(3) .flow-mark {
  font-size: calc(var(--text-figure) * 0.52);
  color: color-mix(in srgb, var(--color-primary) 62%, var(--color-surface-alt));
}

/* ---------- 流程区块 ---------- */
.page-help .flow-block {
  position: relative;
}

.page-help .flow-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  align-items: start;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-help .flow-head .section-index {
  font-size: var(--text-3xl);
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: var(--color-primary);
}

.page-help .flow-title {
  margin: 0 0 var(--space-1);
  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-help .flow-sub {
  margin: 0;
  max-width: 56ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-help .flow-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

/* 图片 */
.page-help .flow-visual {
  margin: 0;
}

.page-help .flow-visual .media-frame {
  border: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 45%, transparent);
  box-shadow: 0 0 24px color-mix(in srgb, var(--color-primary) 20%, transparent);
}

.page-help .flow-caption {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* 步骤列表 */
.page-help .flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-help .flow-step {
  position: relative;
  padding-left: 52px;
  padding-bottom: var(--space-3);
}

.page-help .flow-step::before {
  content: "";
  position: absolute;
  left: calc(20px - (var(--border-thin) / 2));
  top: 44px;
  bottom: 0;
  width: var(--border-thin);
  background: var(--color-line);
}

.page-help .flow-step:last-child {
  padding-bottom: 0;
}

.page-help .flow-step:last-child::before {
  display: none;
}

.page-help .step-dot {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 70%, transparent);
  border-radius: var(--radius-sm);
  background: var(--color-surface-deep);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  letter-spacing: -0.02em;
  box-shadow: 0 0 12px color-mix(in srgb, var(--color-primary) 40%, transparent);
  transition: border-color 0.22s ease, color 0.22s ease, box-shadow 0.22s ease;
}

.page-help .flow-step:hover .step-dot,
.page-help .flow-step:focus-within .step-dot {
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: 0 0 16px color-mix(in srgb, var(--color-accent) 34%, transparent);
}

.page-help .step-card {
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-surface-deep) 42%, transparent);
  padding: var(--space-2) var(--space-3);
  transition: border-color 0.22s ease, background 0.22s ease;
}

.page-help .step-card[open] {
  border-color: color-mix(in srgb, var(--color-primary) 55%, transparent);
  background: color-mix(in srgb, var(--color-surface-deep) 62%, transparent);
}

.page-help .step-sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-2);
  cursor: pointer;
  list-style: none;
}

.page-help .step-sum::-webkit-details-marker {
  display: none;
}

.page-help .step-sum::marker {
  content: "";
}

.page-help .step-sum::after {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-left: var(--space-1);
  border-right: var(--border-thick) solid var(--color-ink-muted);
  border-bottom: var(--border-thick) solid var(--color-ink-muted);
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.22s ease;
}

.page-help .step-card[open] .step-sum::after {
  transform: rotate(-135deg) translateY(-2px);
}

.page-help .step-title {
  flex: 1 1 14ch;
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: 1.55;
  color: var(--color-ink);
}

.page-help .step-time {
  margin-left: auto;
  font-size: var(--text-sm);
  letter-spacing: -0.01em;
  color: var(--color-accent);
  white-space: nowrap;
}

.page-help .step-body {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-help .step-body p {
  margin: 0 0 var(--space-2);
  max-width: 62ch;
}

.page-help .step-body p:last-child {
  margin-bottom: 0;
}

.page-help .step-body a {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-color: var(--color-primary);
  text-underline-offset: 4px;
  text-decoration-thickness: var(--border-thin);
}

.page-help .step-body a:hover,
.page-help .step-body a:focus-visible {
  text-decoration-color: var(--color-accent);
}

.page-help .step-gain {
  padding-left: var(--space-2);
  border-left: var(--border-thick) solid color-mix(in srgb, var(--color-primary) 75%, transparent);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-help .flow-exit {
  margin: var(--space-4) 0 0;
}

.page-help .flow-exit-link {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 70%, transparent);
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--color-primary) 16%, transparent);
  font-size: var(--text-sm);
  line-height: 1.9;
  color: var(--color-ink);
  text-decoration: none;
  transition: border-color 0.22s ease, background 0.22s ease;
}

.page-help .flow-exit-link:hover,
.page-help .flow-exit-link:focus-visible {
  border-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
}

/* ---------- 亮色出口区块 ---------- */
.page-help .stuck-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.page-help .stuck-copy .section-index {
  display: block;
  font-size: var(--text-3xl);
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: color-mix(in srgb, var(--color-contrast-ink) 26%, transparent);
}

.page-help .stuck-title {
  margin: var(--space-2) 0 var(--space-2);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-help .stuck-lead {
  margin: 0;
  max-width: 46ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent);
}

.page-help .stuck-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-help .stuck-item {
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-contrast-surface) 78%, var(--color-contrast-line));
}

.page-help .stuck-item-title {
  margin: 0 0 var(--space-1);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: 1.55;
  color: var(--color-contrast-ink);
}

.page-help .stuck-item p {
  margin: 0;
  max-width: 58ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 76%, transparent);
}

.page-help .stuck-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-help .stuck-contact .contact-line {
  margin: 0;
  max-width: 52ch;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.9;
  letter-spacing: -0.01em;
  color: var(--color-contrast-ink);
}

/* ---------- 响应式 ---------- */
@media (max-width: 639px) {
  .page-help .flow-step {
    padding-left: 44px;
  }

  .page-help .flow-step::before {
    left: calc(16px - (var(--border-thin) / 2));
    top: 36px;
  }

  .page-help .step-dot {
    width: 32px;
    height: 32px;
    font-size: var(--text-xs);
  }

  .page-help .step-time {
    margin-left: 0;
  }
}

@media (min-width: 700px) {
  .page-help .hero-flows {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: end;
  }

  .page-help .hero-flow:nth-child(2) {
    margin-bottom: var(--space-3);
  }

  .page-help .hero-flow:nth-child(3) {
    margin-bottom: calc(var(--space-3) + var(--space-3));
  }
}

@media (min-width: 900px) {
  .page-help .hero-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--gutter);
  }

  .page-help .hero-copy {
    grid-column: span 4;
    padding-bottom: var(--space-2);
  }

  .page-help .hero-flows {
    grid-column: span 8;
  }

  .page-help .flow-head .section-index {
    font-size: var(--text-4xl);
  }

  .page-help .flow-title {
    font-size: var(--text-2xl);
  }

  .page-help .flow-body {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-help .stuck-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-help .stuck-copy {
    position: sticky;
    top: 96px;
  }
}
<<<END>>>