.page-guarantee {
  --promise-dash: 1px dashed var(--color-line);
  --promise-double: var(--border-thick) double var(--color-primary);
  --promise-dash-dark: 1px dashed var(--color-contrast-line);
  display: block;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

.page-guarantee .breadcrumb {
  padding-top: var(--space-3);
  padding-bottom: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-guarantee .breadcrumb a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--color-line);
}

.page-guarantee .breadcrumb a:hover,
.page-guarantee .breadcrumb a:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ---------- 首屏 ---------- */

.page-guarantee .promise-hero {
  padding: var(--space-4) 0 var(--space-8);
  border-bottom: var(--border-thick) double var(--color-primary);
  background:
    repeating-linear-gradient(90deg, transparent 0 39px, color-mix(in srgb, var(--color-line) 45%, transparent) 39px 40px),
    var(--color-surface);
}

.page-guarantee .promise-kicker {
  margin: 0 auto;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.page-guarantee .promise-title {
  margin: var(--space-3) auto var(--space-3);
  max-width: 17ch;
  text-align: center;
  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-guarantee .promise-lede {
  margin: 0 auto;
  max-width: 60ch;
  text-align: center;
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

.page-guarantee .promise-hero-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-guarantee .promise-tally {
  border: var(--promise-double);
  background: var(--color-surface-alt);
  padding: var(--space-3);
}

.page-guarantee .promise-tally-head {
  margin: 0;
  padding-bottom: var(--space-2);
  border-bottom: var(--promise-dash);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  letter-spacing: 0.02em;
  color: var(--color-ink);
}

.page-guarantee .promise-tally-head .num {
  color: var(--color-accent);
  font-size: var(--text-xl);
}

.page-guarantee .promise-tally-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-guarantee .promise-tally-list li {
  border-bottom: var(--promise-dash);
}

.page-guarantee .promise-tally-list li:last-child {
  border-bottom: 0;
}

.page-guarantee .promise-tally-link {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: 10px 0;
  font-size: var(--text-sm);
  color: var(--color-ink);
  text-decoration: none;
}

.page-guarantee .promise-tally-link .num {
  flex: none;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.page-guarantee .promise-tally-link:hover,
.page-guarantee .promise-tally-link:focus-visible {
  color: var(--color-accent);
  background: var(--color-primary-soft);
}

.page-guarantee .promise-figures {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--color-line);
  border: var(--promise-double);
}

.page-guarantee .promise-figure {
  background: var(--color-surface);
  padding: var(--space-3) var(--space-2);
}

.page-guarantee .promise-figure dt {
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-guarantee .promise-figure dd {
  margin: var(--space-1) 0 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-guarantee .promise-figure .figure-value {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  line-height: 1;
  color: var(--color-accent);
}

.page-guarantee .promise-figure .figure-unit {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-guarantee .promise-hero-figure {
  margin: var(--space-6) 0 0;
  position: relative;
  border: 1px solid var(--color-line);
  background: var(--color-surface-deep);
}

.page-guarantee .promise-hero-figure img,
.page-guarantee .promise-inset-figure img,
.page-guarantee .promise-band-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-guarantee .promise-hero-figure img {
  height: clamp(190px, 32vw, 420px);
}

.page-guarantee .media-caption {
  position: absolute;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 5px 10px;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  line-height: 1.5;
}

/* ---------- 主栏与目录 ---------- */

.page-guarantee .promise-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding: var(--space-6) 0 var(--space-8);
}

.page-guarantee .promise-main {
  min-width: 0;
}

.page-guarantee .promise-aside {
  min-width: 0;
  order: -1;
}

.page-guarantee .promise-aside-head {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--color-ink-muted);
}

.page-guarantee .section-nav {
  display: flex;
  gap: 0;
  overflow-x: auto;
  border-top: var(--border-thick) double var(--color-primary);
  border-bottom: var(--promise-dash);
  background: var(--color-surface-alt);
  -webkit-overflow-scrolling: touch;
}

.page-guarantee .section-nav a {
  flex: none;
  display: block;
  white-space: nowrap;
  padding: 10px var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: 3px solid transparent;
}

.page-guarantee .section-nav a:hover,
.page-guarantee .section-nav a:focus-visible {
  background: var(--color-primary-soft);
  color: var(--color-ink);
}

.page-guarantee .section-nav a[data-current="true"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  background: var(--color-primary-soft);
}

.page-guarantee .promise-aside-note {
  margin: var(--space-2) 0 0;
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

/* ---------- 区块通用 ---------- */

.page-guarantee .promise-section {
  padding-bottom: var(--space-8);
}

.page-guarantee .promise-section + .promise-section {
  border-top: var(--promise-dash);
  padding-top: var(--space-6);
}

.page-guarantee .promise-sec-head {
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thick) double var(--color-primary);
  margin-bottom: var(--space-4);
}

.page-guarantee .promise-sec-kicker {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  color: var(--color-accent);
}

.page-guarantee .promise-sec-title {
  margin: 0;
  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);
  color: var(--color-ink);
}

.page-guarantee .promise-sec-lede {
  margin: var(--space-2) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}

.page-guarantee .promise-foot-note {
  margin: var(--space-4) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-ink-soft);
}

.page-guarantee .promise-foot-note a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
}

.page-guarantee .promise-foot-note a:hover,
.page-guarantee .promise-foot-note a:focus-visible {
  background: var(--color-highlight);
}

/* ---------- 折叠条目 ---------- */

.page-guarantee .promise-items {
  border-top: var(--promise-dash);
}

.page-guarantee .promise-item {
  border-bottom: var(--promise-dash);
}

.page-guarantee .promise-toggle {
  width: 100%;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  background: transparent;
  border: 0;
  border-radius: var(--radius-sm);
  text-align: left;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.4;
  color: var(--color-ink);
}

.page-guarantee .promise-toggle:hover,
.page-guarantee .promise-toggle:focus-visible {
  background: var(--color-primary-soft);
  outline: 1px solid var(--color-focus);
  outline-offset: 2px;
}

.page-guarantee .promise-toggle-num {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

.page-guarantee .promise-toggle-text {
  min-width: 0;
}

.page-guarantee .promise-toggle-mark {
  width: 12px;
  height: 12px;
  align-self: center;
  border-left: 1px solid var(--color-primary);
  border-bottom: 1px solid var(--color-primary);
  transform: rotate(-45deg);
  transition: transform 180ms ease;
}

.page-guarantee .promise-item[data-open="false"] .promise-toggle-mark {
  transform: rotate(135deg);
}

.page-guarantee .promise-panel {
  display: grid;
  grid-template-rows: 1fr;
  transition: grid-template-rows 180ms ease;
}

.page-guarantee .promise-panel[data-open="false"] {
  grid-template-rows: 0fr;
}

.page-guarantee .promise-panel > .panel-body {
  overflow: hidden;
  transition: opacity 180ms ease;
}

.page-guarantee .promise-panel[data-open="false"] > .panel-body {
  opacity: 0;
}

.page-guarantee .promise-meta {
  margin: 0;
  padding: 0 0 var(--space-3);
  display: grid;
  gap: var(--space-2);
}

.page-guarantee .promise-meta-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding-left: var(--space-2);
  border-left: var(--border-thick) solid var(--color-highlight);
}

.page-guarantee .promise-meta-row dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

.page-guarantee .promise-meta-row dd {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-ink-soft);
}

/* ---------- 图组 ---------- */

.page-guarantee .promise-figure-pair {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.page-guarantee .promise-inset-figure,
.page-guarantee .promise-band-figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--color-line);
  background: var(--color-surface-deep);
}

.page-guarantee .promise-inset-figure img {
  height: clamp(150px, 26vw, 240px);
}

.page-guarantee .promise-band-figure {
  margin-top: var(--space-4);
}

.page-guarantee .promise-band-figure img {
  height: clamp(140px, 24vw, 230px);
}

/* ---------- 时效节奏带 ---------- */

.page-guarantee .promise-cadence {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(250px, 1fr);
  overflow-x: auto;
  border-top: var(--promise-dash);
  border-bottom: var(--border-thick) double var(--color-primary);
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
}

.page-guarantee .promise-node {
  scroll-snap-align: start;
  padding: var(--space-3);
  border-left: var(--promise-dash);
}

.page-guarantee .promise-node:first-child {
  border-left: 0;
  padding-left: 0;
}

.page-guarantee .promise-node-tag {
  display: inline-block;
  padding: 3px 8px;
  background: var(--color-primary-soft);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.page-guarantee .promise-node-title {
  display: block;
  margin: var(--space-2) 0 6px;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.35;
  color: var(--color-ink);
}

.page-guarantee .promise-node-note {
  display: block;
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-ink-soft);
}

/* ---------- 纠错列表 ---------- */

.page-guarantee .promise-plain-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--promise-dash);
}

.page-guarantee .promise-plain-list > li {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  border-bottom: var(--promise-dash);
}

.page-guarantee .promise-plain-tag {
  justify-self: start;
  padding: 2px 8px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-accent);
}

.page-guarantee .promise-plain-list h3 {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.35;
  color: var(--color-ink);
}

.page-guarantee .promise-plain-list p {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-ink-soft);
}

.page-guarantee .promise-copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding: var(--space-2) var(--space-3);
  border: var(--promise-double);
  background: var(--color-surface-alt);
}

.page-guarantee .promise-copy-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-guarantee .promise-copy-value {
  font-size: var(--text-lg);
  color: var(--color-ink);
}

.page-guarantee .promise-copy .copy-btn {
  margin-left: auto;
}

.page-guarantee .promise-copy .copy-hint {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

/* ---------- 深色边界区 ---------- */

.page-guarantee .promise-band {
  border-top: var(--border-thick) double var(--color-contrast-line);
  border-bottom: var(--border-thick) double var(--color-contrast-line);
  padding: var(--space-8) 0;
}

.page-guarantee .promise-band .promise-sec-head {
  border-bottom-color: var(--color-contrast-line);
}

.page-guarantee .promise-band .promise-sec-kicker {
  color: var(--color-contrast-accent);
}

.page-guarantee .promise-band .promise-sec-title {
  color: var(--color-contrast-ink);
}

.page-guarantee .promise-band .promise-sec-lede {
  color: color-mix(in srgb, var(--color-contrast-ink) 74%, transparent);
}

.page-guarantee .promise-boundary-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-guarantee .promise-boundary-list > li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: var(--promise-dash-dark);
}

.page-guarantee .promise-boundary-list > li:last-child {
  border-bottom: 0;
}

.page-guarantee .promise-boundary-num {
  font-size: var(--text-lg);
  line-height: 1.2;
  color: var(--color-contrast-accent);
}

.page-guarantee .promise-boundary-list h3 {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.35;
  color: var(--color-contrast-ink);
}

.page-guarantee .promise-boundary-list p {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: 1.8;
  color: color-mix(in srgb, var(--color-contrast-ink) 76%, transparent);
}

/* ---------- 行动出口 ---------- */

.page-guarantee .promise-outro {
  padding: var(--space-8) 0 var(--space-8);
}

.page-guarantee .promise-outro-head {
  padding-bottom: var(--space-3);
  border-bottom: var(--promise-double);
  margin-bottom: var(--space-4);
}

.page-guarantee .promise-outro-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.page-guarantee .promise-outro-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  border: 1px solid var(--color-line);
  border-top: var(--border-thick) solid var(--color-primary);
  background: var(--color-surface-alt);
  border-radius: var(--radius-sm);
}

.page-guarantee .promise-outro-card--accent {
  border-top-color: var(--color-accent);
  background: var(--color-highlight);
}

.page-guarantee .promise-outro-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

.page-guarantee .promise-outro-card h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.4;
  color: var(--color-ink);
}

.page-guarantee .promise-outro-card p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-ink-soft);
}

.page-guarantee .promise-outro-card .btn {
  align-self: flex-start;
  margin-top: auto;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-guarantee .promise-tally-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-guarantee .promise-tally-list li:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .page-guarantee .promise-tally-list li:nth-child(odd) {
    padding-right: var(--space-2);
    border-right: var(--promise-dash);
  }

  .page-guarantee .promise-tally-list li:nth-child(even) {
    padding-left: var(--space-2);
  }

  .page-guarantee .promise-meta-row {
    grid-template-columns: 88px 1fr;
    gap: var(--space-2);
  }

  .page-guarantee .promise-figure-pair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-guarantee .promise-plain-list > li {
    grid-template-columns: 72px 1fr;
    gap: var(--space-3);
  }

  .page-guarantee .promise-outro-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-guarantee .promise-outro-card--accent {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1000px) {
  .page-guarantee .promise-hero {
    padding: var(--space-6) 0 var(--space-8);
  }

  .page-guarantee .promise-hero-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-4);
    align-items: start;
  }

  .page-guarantee .promise-layout {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 0;
    align-items: start;
    padding: var(--space-8) 0 var(--space-8);
  }

  .page-guarantee .promise-main {
    padding-right: var(--space-6);
    border-right: var(--promise-dash);
  }

  .page-guarantee .promise-aside {
    order: 0;
    position: sticky;
    top: 104px;
    padding-left: var(--space-4);
  }

  .page-guarantee .section-nav {
    display: block;
    overflow: visible;
  }

  .page-guarantee .section-nav a {
    white-space: normal;
    border-bottom: 0;
    border-left: 3px solid transparent;
    padding: 9px var(--space-2);
  }

  .page-guarantee .section-nav a[data-current="true"] {
    border-bottom-color: transparent;
    border-left-color: var(--color-accent);
  }

  .page-guarantee .promise-figure-pair {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-guarantee .promise-boundary-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--space-6);
  }

  .page-guarantee .promise-outro-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-guarantee .promise-outro-card--accent {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-guarantee .promise-panel,
  .page-guarantee .promise-panel > .panel-body,
  .page-guarantee .promise-toggle-mark {
    transition: none;
  }
}
<<<END>>>