.page-about {
  --about-axis: 40px;
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding: 22px 0 0;
  font-size: 13px;
}

.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumbs__link {
  color: var(--gray-500);
  text-decoration: none;
  transition: color 140ms ease;
}

.page-about .breadcrumbs__link:hover,
.page-about .breadcrumbs__link:focus-visible {
  color: var(--blue-700);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .breadcrumbs__sep {
  color: var(--blue-200);
}

.page-about .breadcrumbs__current {
  color: var(--blue-700);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  margin-top: 18px;
  border-top: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(187, 211, 230, 0.22), rgba(246, 243, 236, 0) 68%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 32px;
  padding: 34px 0 52px;
}

.page-about .about-hero__intro {
  min-width: 0;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(30px, 6.4vw, 58px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--blue-900);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__facts {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  align-self: start;
}

.page-about .about-fact {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 15px 16px 15px 19px;
  background: var(--paper);
  border-left: 3px solid transparent;
  transition: border-color 160ms ease, background 160ms ease;
}

.page-about .about-fact:hover {
  border-left-color: var(--orange-600);
  background: #fff;
}

.page-about .about-fact__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gray-500);
}

.page-about .about-fact__value {
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 27px;
  font-weight: 700;
  line-height: 1;
  color: var(--blue-700);
}

.page-about .about-fact__value span {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-500);
}

.page-about .about-fact__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--gray-500);
}

/* ---------- 章节主轴 ---------- */
.page-about .about-body {
  padding-top: 8px;
  padding-bottom: 64px;
}

.page-about .about-main {
  position: relative;
}

.page-about .about-chapter {
  position: relative;
  padding: 0 0 48px var(--about-axis);
  border-left: 1px solid var(--line);
}

.page-about .about-chapter:last-child {
  padding-bottom: 8px;
}

.page-about .about-chapter__head {
  position: relative;
  margin-bottom: 20px;
}

.page-about .about-chapter__head::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--about-axis));
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--blue-200);
  transform: translateX(-50%);
  box-shadow: 0 0 0 5px var(--paper);
  transition: background 200ms ease, box-shadow 200ms ease;
}

.page-about .about-chapter__head:has(.section-title.is-current)::before {
  background: var(--orange-600);
  box-shadow: 0 0 0 5px var(--paper), 0 0 0 7px rgba(210, 96, 10, 0.16);
}

.page-about .about-chapter__idx {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange-600);
}

.page-about .section-title {
  margin: 0;
  font-size: clamp(21px, 3.2vw, 30px);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--blue-700);
  transition: color 200ms ease;
}

.page-about .section-title.is-current {
  color: var(--blue-900);
}

.page-about .about-chapter__body {
  display: grid;
  gap: 18px;
}

.page-about .about-chapter__body > p {
  margin: 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-chapter__tail {
  margin: 6px 0 0;
  max-width: 68ch;
  padding: 14px 16px;
  border-left: 3px solid var(--blue-200);
  background: var(--gray-100);
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray-500);
}

.page-about .about-inline-link {
  color: var(--blue-500);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--orange-600);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 4px 0 0;
  border: 1px solid var(--line);
  background: var(--gray-100);
}

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

.page-about .about-figure__cap {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: #fff;
  font-size: 12px;
  line-height: 1.6;
  color: var(--gray-500);
}

.page-about .about-figure--side {
  margin: 0;
}

.page-about .about-figure--wide {
  margin-top: 6px;
}

/* ---------- 团队分栏 ---------- */
.page-about .about-chapter__split {
  display: grid;
  gap: 20px;
}

.page-about .about-chapter__col {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-chapter__col p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}

/* ---------- 数据卡 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 6px 0 0;
  padding: 1px;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-metrics__item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 16px 14px;
  background: var(--paper);
  transition: background 160ms ease, box-shadow 160ms ease;
}

.page-about .about-metrics__item:hover {
  background: #fff;
  box-shadow: inset 3px 0 0 var(--orange-600);
}

.page-about .about-metrics__value {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--blue-700);
}

.page-about .about-metrics__unit {
  font-size: 12px;
  color: var(--gray-500);
}

.page-about .about-metrics__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink);
}

/* ---------- 五阶段流程 ---------- */
.page-about .about-flow {
  display: grid;
  gap: 14px;
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flow__step {
  position: relative;
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 18px 16px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-top: 3px solid var(--blue-200);
  transition: border-top-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.page-about .about-flow__step:hover {
  border-top-color: var(--orange-600);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.page-about .about-flow__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange-600);
}

.page-about .about-flow__title {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--blue-900);
}

.page-about .about-flow__dur {
  margin: 0;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--blue-500);
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--gray-500);
}

.page-about .about-flow__text strong {
  color: var(--blue-700);
  font-weight: 700;
}

/* ---------- 保修档位 ---------- */
.page-about .about-tiers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tiers__item {
  display: grid;
  gap: 4px;
  align-content: start;
  padding: 14px 14px 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-bottom: 3px solid var(--blue-200);
}

.page-about .about-tiers__item--long {
  border-bottom-color: var(--orange-600);
}

.page-about .about-tiers__m {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--blue-700);
}

.page-about .about-tiers__u {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gray-500);
}

.page-about .about-tiers__d {
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink);
}

/* ---------- 资质标签墙 ---------- */
.page-about .about-badges {
  display: grid;
  gap: 8px;
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-badges__item {
  position: relative;
  padding: 13px 16px 13px 38px;
  background: #fff;
  border: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.6;
  color: var(--blue-700);
  transition: border-color 160ms ease, color 160ms ease;
}

.page-about .about-badges__item::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  width: 12px;
  height: 1px;
  background: var(--orange-600);
  transform: translateY(-50%);
}

.page-about .about-badges__item:hover {
  border-color: var(--line-strong);
  color: var(--blue-900);
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  margin-top: 8px;
  padding: 44px 0 60px;
  background: var(--blue-900);
  border-top: 3px solid var(--orange-600);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 24px;
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(22px, 3.6vw, 34px);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: #fff;
}

.page-about .about-cta__lede {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--blue-200);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about {
    --about-axis: 52px;
  }

  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-tiers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1fr) 396px;
    gap: 48px;
    align-items: start;
    padding: 46px 0 64px;
  }

  .page-about .about-chapter__split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
    border: 1px solid var(--line);
    border-top: 0;
    background: var(--gray-100);
  }

  .page-about .about-flow__step {
    border: 0;
    border-top: 3px solid var(--blue-200);
    border-right: 1px solid var(--line);
    box-shadow: none;
  }

  .page-about .about-flow__step:last-child {
    border-right: 0;
  }

  .page-about .about-flow__step:hover {
    transform: none;
    box-shadow: none;
    background: var(--paper);
  }

  .page-about .about-badges {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-badges__item:last-child {
    grid-column: 1 / -1;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
  }

  .page-about .about-cta__actions {
    flex-wrap: nowrap;
  }
}

@media (min-width: 1140px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1fr) 430px;
    gap: 64px;
  }

  .page-about .about-metrics {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-tiers {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}
<<<END>>>