.page-about {
  --about-slant: 6deg;
  --about-panel: #EAE2D3;
  background: var(--paper);
  color: var(--graphite);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: 20px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--mist);
}
.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-strong);
}
.page-about .breadcrumbs a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-about .breadcrumbs a:hover {
  border-bottom-color: var(--amber);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 56px;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -10%;
  right: -6%;
  width: 62%;
  height: 78%;
  background:
    repeating-linear-gradient(90deg, rgba(14, 42, 63, 0.06) 0 1px, transparent 1px 48px),
    var(--about-panel);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 14% 100%);
  z-index: 0;
}
.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}
.page-about .about-hero__lead .kicker {
  display: inline-block;
  margin: 0 0 16px;
  padding-left: 26px;
  position: relative;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--ink-soft);
  text-transform: uppercase;
}
.page-about .about-hero__lead .kicker::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 18px;
  height: 2px;
  background: var(--amber);
}
.page-about .about-hero h1 {
  margin: 0 0 22px;
  font-size: clamp(30px, 7vw, 56px);
  line-height: 1.08;
  letter-spacing: 0.04em;
  font-weight: 900;
  color: var(--ink);
  max-width: 15em;
}
.page-about .about-hero__intro {
  margin: 0 0 16px;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--graphite);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__panel {
  position: relative;
  border: 1px solid var(--line-strong);
  border-top: 3px solid var(--amber);
  background: var(--white);
  padding: 22px 20px 8px;
}
.page-about .about-hero__panel .annot {
  position: absolute;
  top: 22px;
  right: 8px;
  writing-mode: vertical-rl;
  font-size: 11px;
  letter-spacing: 0.32em;
  color: rgba(14, 42, 63, 0.45);
}
.page-about .hero-metrics {
  margin: 0;
  padding: 0 22px 0 0;
  list-style: none;
}
.page-about .hero-metric {
  display: grid;
  grid-template-columns: minmax(78px, auto) 1fr;
  gap: 4px 16px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.page-about .hero-metric:last-child {
  border-bottom: 0;
}
.page-about .hero-metric__num {
  font-size: clamp(24px, 5vw, 32px);
  font-weight: 600;
  color: var(--ink);
  line-height: 1;
}
.page-about .hero-metric__num i,
.page-about .hero-metric__num em {
  font-style: normal;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber);
  margin-left: 2px;
}
.page-about .hero-metric__label {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-soft);
}
.page-about .hero-metric--flat .hero-metric__num {
  color: var(--ink-soft);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  position: relative;
  padding: 56px 0;
  border-top: 1px solid var(--line);
}
.page-about .about-section .section-head {
  margin-bottom: 24px;
}
.page-about .about-section .section-title {
  margin: 0;
  font-size: clamp(22px, 4.4vw, 34px);
  line-height: 1.25;
  letter-spacing: 0.03em;
  font-weight: 900;
  color: var(--ink);
  max-width: 22em;
}
.page-about .about-section .section-head__index {
  display: block;
  margin-bottom: 10px;
  font-size: 13px;
  color: var(--amber);
  letter-spacing: 0.16em;
}

/* ---------- 岗位分工 ---------- */
.page-about .about-roles {
  background: var(--paper);
}
.page-about .about-roles__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.page-about .about-roles__lead {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--graphite);
  max-width: 34em;
}
.page-about .about-roles__aside .note {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .role-list {
  border-top: 1px solid var(--line-strong);
}
.page-about .role-item {
  border-bottom: 1px solid var(--line);
  border-left: 2px solid var(--line-strong);
  padding-left: 14px;
  transition: border-left-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .role-item:has([aria-expanded="true"]) {
  border-left-color: var(--amber);
  background: rgba(234, 226, 211, 0.45);
}
.page-about .role-item__head {
  margin: 0;
  font-weight: inherit;
}
.page-about .role-item__trigger {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "no name chev"
    "no brief chev";
  align-items: center;
  column-gap: 12px;
  row-gap: 2px;
  width: 100%;
  padding: 16px 4px;
  background: none;
  border: 0;
  text-align: left;
  font: inherit;
  color: inherit;
  cursor: pointer;
}
.page-about .role-item__no {
  grid-area: no;
  align-self: start;
  font-size: 12px;
  color: var(--amber);
  letter-spacing: 0.1em;
  padding-top: 4px;
}
.page-about .role-item__name {
  grid-area: name;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.04em;
}
.page-about .role-item__brief {
  grid-area: brief;
  font-size: 13.5px;
  color: var(--mist);
}
.page-about .role-item__chev {
  grid-area: chev;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--ink-soft);
  border-bottom: 2px solid var(--ink-soft);
  transform: rotate(-45deg);
  transition: transform var(--dur-mid) var(--ease);
}
.page-about .role-item__trigger[aria-expanded="true"] .role-item__chev {
  transform: rotate(45deg);
  border-color: var(--amber);
}
.page-about .role-item__panel {
  padding: 0 4px 18px;
}
.page-about .role-item__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--graphite);
  max-width: 40em;
}

/* ---------- 准入四关 ---------- */
.page-about .about-entry {
  background: var(--paper-2);
}
.page-about .about-entry__lead {
  margin: 0 0 30px;
  max-width: 42em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--graphite);
}
.page-about .about-entry__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.page-about .about-entry__track {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line-strong);
}
.page-about .entry-step {
  position: relative;
  padding: 20px 0 20px 24px;
  border-bottom: 1px solid var(--line);
}
.page-about .entry-step::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--line-strong);
}
.page-about .entry-step__dot {
  position: absolute;
  left: 0;
  top: 26px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px var(--paper-2);
}
.page-about .entry-step__head {
  margin: 0;
  font-weight: inherit;
}
.page-about .entry-step__trigger {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  width: 100%;
  padding: 0 20px 0 0;
  background: none;
  border: 0;
  text-align: left;
  font: inherit;
  color: inherit;
  cursor: pointer;
}
.page-about .entry-step__no {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
}
.page-about .entry-step__name {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--ink);
}
.page-about .entry-step__chev {
  position: absolute;
  right: 2px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--ink-soft);
  border-bottom: 2px solid var(--ink-soft);
  transform: rotate(-45deg);
  transition: transform var(--dur-mid) var(--ease);
}
.page-about .entry-step__trigger[aria-expanded="true"] .entry-step__chev {
  transform: rotate(45deg);
  border-color: var(--amber);
}
.page-about .entry-step__brief {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}
.page-about .entry-step__panel {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--amber);
}
.page-about .entry-step__panel ul {
  margin: 0;
  padding-left: 16px;
  list-style: square;
}
.page-about .entry-step__panel li {
  margin-bottom: 8px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--graphite);
}
.page-about .entry-step__panel li:last-child {
  margin-bottom: 0;
}
.page-about .about-entry__figure {
  margin: 0;
}
.page-about .about-entry__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-coverage {
  background: var(--paper);
}
.page-about .about-coverage__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.page-about .about-coverage__text p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--graphite);
  max-width: 38em;
}
.page-about .coverage-timing {
  margin-top: 24px;
  border-top: 1px solid var(--line-strong);
}
.page-about .coverage-timing__row {
  display: grid;
  grid-template-columns: 56px 82px 1fr;
  align-items: baseline;
  gap: 8px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}
.page-about .coverage-timing__cat {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.06em;
}
.page-about .coverage-timing__val {
  font-size: 18px;
  font-weight: 600;
  color: var(--amber);
}
.page-about .coverage-timing__desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-coverage__map {
  border: 1px solid var(--line-strong);
  background: var(--white);
  padding: 20px 18px;
}
.page-about .about-coverage__map .kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--ink-soft);
}
.page-about .city-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
  gap: 6px;
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}
.page-about .city-cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 7px 5px 5px;
  border: 1px solid var(--line);
  background: var(--paper);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-about .city-cell .mono {
  font-size: 11px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
}
.page-about .city-cell i {
  display: block;
  height: 14px;
  background: repeating-linear-gradient(
    90deg,
    var(--celadon) 0 3px,
    transparent 3px 6px
  );
  opacity: 0.85;
}
.page-about .city-cell:hover {
  border-color: var(--amber);
  transform: translateY(-2px);
}
.page-about .about-coverage__map .note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 培训与抽检 ---------- */
.page-about .about-training {
  background: var(--paper-2);
}
.page-about .about-training__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.page-about .about-training__prose {
  max-width: 40em;
}
.page-about .about-training__prose p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--graphite);
}
.page-about .about-training__prose a {
  color: var(--ink);
  border-bottom: 1px solid var(--amber);
  text-decoration: none;
}
.page-about .about-training__prose a:hover {
  color: var(--amber);
}
.page-about .about-training__figure {
  margin: 0;
}
.page-about .about-training__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 5;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  background: var(--ink);
  color: var(--paper);
  border-top: 0;
}
.page-about .about-partners::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(0deg, rgba(246, 241, 231, 0.05) 0 1px, transparent 1px 48px);
  pointer-events: none;
}
.page-about .about-partners__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: start;
}
.page-about .about-partners .section-title {
  color: var(--paper);
}
.page-about .about-partners .section-head__index {
  color: var(--amber-2);
}
.page-about .about-partners__text p {
  margin: 0 0 15px;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(246, 241, 231, 0.84);
  max-width: 38em;
}
.page-about .about-partners__links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 22px;
}
.page-about .about-partners__links a {
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--amber-2);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 201, 138, 0.45);
  padding-bottom: 2px;
}
.page-about .about-partners__links a:hover {
  color: var(--white);
  border-bottom-color: var(--white);
}
.page-about .about-partners__figure {
  margin: 0;
}
.page-about .about-partners__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}
.page-about .about-partners__figure .figure__caption {
  color: rgba(246, 241, 231, 0.6);
}

/* ---------- 返工保障 ---------- */
.page-about .about-guarantee {
  background: var(--paper);
}
.page-about .guarantee-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-about .guarantee-card {
  border: 1px solid var(--line-strong);
  border-top: 3px solid var(--celadon);
  background: var(--white);
  padding: 22px 20px;
}
.page-about .guarantee-card__title {
  margin: 0 0 14px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--ink);
}
.page-about .guarantee-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .guarantee-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 11px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--graphite);
}
.page-about .guarantee-list li:last-child {
  margin-bottom: 0;
}
.page-about .guarantee-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--celadon);
  opacity: 0.75;
}
.page-about .guarantee-card--ink {
  background: var(--ink-soft);
  border-top-color: var(--amber);
  color: var(--paper);
}
.page-about .guarantee-card--ink .guarantee-card__title {
  color: var(--paper);
}
.page-about .guarantee-card--ink p {
  margin: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(246, 241, 231, 0.86);
}
.page-about .guarantee-card--ink .btn {
  display: inline-block;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 56px 0 80px;
  }
  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: start;
  }
  .page-about .about-roles__grid {
    grid-template-columns: 4fr 8fr;
    gap: 40px;
  }
  .page-about .about-entry__track {
    grid-template-columns: repeat(2, 1fr);
    border-top: 0;
    column-gap: 28px;
  }
  .page-about .entry-step {
    padding-left: 26px;
    border-top: 1px solid var(--line);
  }
  .page-about .entry-step::before {
    top: 0;
  }
  .page-about .about-coverage__grid {
    grid-template-columns: 7fr 5fr;
    gap: 40px;
    align-items: start;
  }
  .page-about .about-training__grid {
    grid-template-columns: 7fr 4fr;
    gap: 44px;
    align-items: start;
  }
  .page-about .about-partners__grid {
    grid-template-columns: 5fr 7fr;
    gap: 40px;
    align-items: center;
  }
  .page-about .guarantee-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .guarantee-card--ink {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-about .about-section {
    padding: 76px 0;
  }
  .page-about .about-entry__body {
    grid-template-columns: 8fr 4fr;
    gap: 44px;
    align-items: start;
  }
  .page-about .about-entry__track {
    grid-template-columns: repeat(2, 1fr);
    column-gap: 32px;
  }
  .page-about .guarantee-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .guarantee-card--ink {
    grid-column: auto;
  }
  .page-about .about-coverage__map {
    padding: 26px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role-item,
  .page-about .city-cell,
  .page-about .role-item__chev,
  .page-about .entry-step__chev {
    transition: none;
  }
  .page-about .city-cell:hover {
    transform: none;
  }
}
<<<END>>>