.page-about {
  display: block;
  background: var(--white);
  overflow-x: clip;
}

.page-about [id] {
  scroll-margin-top: calc(var(--header-h) + 76px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4vw, 40px) 0 clamp(42px, 7vw, 82px);
  background:
    radial-gradient(120% 110% at 88% 4%, var(--navy-soft) 0%, rgba(20, 52, 92, 0) 62%),
    linear-gradient(158deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: var(--white);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 32%;
  right: -14%;
  bottom: -36%;
  height: 320px;
  background: repeating-linear-gradient(118deg, rgba(255, 107, 44, 0.17) 0 2px, rgba(255, 107, 44, 0) 2px 16px);
  transform: rotate(-5deg);
  pointer-events: none;
}

.page-about .about-hero .crumbs {
  position: relative;
  z-index: 1;
  margin-bottom: clamp(22px, 4vw, 36px);
}

.page-about .about-hero .crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
}

.page-about .about-hero .crumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-hero .crumbs__link {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-about .about-hero .crumbs__link:hover,
.page-about .about-hero .crumbs__link:focus-visible {
  color: var(--orange);
}

.page-about .about-hero .crumbs__sep {
  color: rgba(255, 255, 255, 0.3);
}

.page-about .about-hero .crumbs__item [aria-current="page"] {
  color: var(--white);
  font-weight: 600;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 5vw, 52px);
  align-items: center;
}

.page-about .about-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(29px, 6vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-hero__lede {
  margin: 0 0 26px;
  max-width: 58ch;
  font-size: clamp(15px, 2.1vw, 17px);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__visual {
  display: flex;
  justify-content: center;
}

.page-about .about-hero__glyph {
  display: block;
  width: min(100%, 360px);
  height: auto;
}

/* ---------- 章节索引条 ---------- */
.page-about .about-index {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  background: var(--paper);
  border-bottom: 1px solid var(--hair);
}

.page-about .about-index__inner {
  display: flex;
  gap: 20px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 12px var(--gutter);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-index__inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__link {
  flex: 0 0 auto;
  padding-bottom: 3px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(24px, 4vw, 42px);
  align-items: start;
}

.page-about .about-origin__text p {
  margin: 0 0 18px;
}

.page-about .about-origin__text p:last-child {
  margin-bottom: 0;
}

.page-about .about-pull {
  padding: 24px 22px;
  background: var(--paper);
  border-left: 4px solid var(--orange);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-pull__label {
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--navy);
}

.page-about .about-pull__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-about .about-pull__item {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 2px 10px;
  align-items: baseline;
}

.page-about .about-pull__num {
  grid-row: span 2;
  font-size: 12px;
  font-weight: 700;
  color: var(--orange);
}

.page-about .about-pull__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
}

.page-about .about-pull__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .about-origin__media {
  margin: clamp(30px, 5vw, 48px) 0 0;
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-nodes {
  background: var(--paper);
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 4px 0 4px 34px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--orange-deep) 52%, var(--hair) 52%, var(--hair) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(22px, 3.4vw, 34px);
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 6px;
  width: 16px;
  height: 16px;
  background: var(--orange);
  box-shadow: 0 0 0 4px var(--orange-pale);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: 4px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--navy);
}

.page-about .about-timeline__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(24px, 3.6vw, 34px);
  align-items: start;
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-facets {
  display: grid;
  gap: 16px;
}

.page-about .about-facet {
  position: relative;
  padding: 24px 20px 22px;
  background: var(--white);
  border: 1px solid var(--hair);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-about .about-facet::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 0;
  width: 34px;
  height: 3px;
  background: var(--orange);
  transition: width 0.22s var(--ease);
}

.page-about .about-facet:hover,
.page-about .about-facet:focus-within {
  border-color: var(--orange);
}

.page-about .about-facet:hover::before {
  width: 62px;
}

.page-about .about-facet__tag {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--grey);
}

.page-about .about-facet__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
}

.page-about .about-facet__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-figures {
  display: grid;
  gap: 1px;
  margin-top: clamp(30px, 4.6vw, 46px);
  background: var(--hair);
  border-top: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
}

.page-about .about-figures__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 20px;
  background: var(--white);
}

.page-about .about-figures .metric__value {
  font-size: clamp(28px, 5vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-figures .metric__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* ---------- 04 服务覆盖 ---------- */
.page-about .about-coverage {
  background: var(--paper);
}

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

.page-about .about-region {
  padding: 26px 22px;
  border: 1px solid var(--hair);
  background: var(--white);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-region--east {
  background: linear-gradient(180deg, rgba(0, 184, 169, 0.09) 0%, rgba(255, 255, 255, 1) 62%);
  border-left: 4px solid var(--teal);
}

.page-about .about-region--south {
  background: linear-gradient(180deg, rgba(255, 192, 67, 0.14) 0%, rgba(255, 255, 255, 1) 62%);
  border-left: 4px solid var(--amber);
}

.page-about .about-region__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.page-about .about-region__count {
  font-size: 13px;
  font-weight: 700;
  color: var(--grey);
}

.page-about .about-region__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(19px, 3.4vw, 24px);
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--navy);
}

.page-about .about-region__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-coverage__media {
  margin: clamp(28px, 4.4vw, 44px) 0 0;
}

/* ---------- 05 信任信息 ---------- */
.page-about .about-trust {
  display: grid;
  gap: 20px;
  align-items: start;
}

.page-about .about-trust__panel {
  position: relative;
  padding: 26px 22px 24px;
}

.page-about .about-trust__panel::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 0;
  width: 42px;
  height: 3px;
  background: var(--orange);
}

.page-about .about-trust__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.6);
}

.page-about .about-trust__icp {
  margin: 0 0 14px;
  font-size: clamp(19px, 3.6vw, 25px);
  font-weight: 700;
  color: var(--orange);
  word-break: break-word;
}

.page-about .about-trust__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.76);
}

.page-about .about-trust__list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-trust__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--hair);
}

.page-about .about-trust__key {
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--grey);
}

.page-about .about-trust__val {
  font-size: 15px;
  font-weight: 600;
  color: var(--navy);
  word-break: break-word;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(40px, 7vw, 76px) 0;
  background: linear-gradient(140deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: var(--white);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  left: -10%;
  right: -10%;
  top: 0;
  height: 6px;
  background: repeating-linear-gradient(100deg, var(--orange) 0 26px, var(--orange-deep) 26px 52px, var(--navy-soft) 52px 78px);
}

.page-about .about-cta__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-cta__title {
  margin: 0 0 14px;
  max-width: 30ch;
  font-family: var(--font-head);
  font-size: clamp(22px, 4.4vw, 34px);
  font-weight: 800;
  line-height: 1.28;
  color: var(--white);
}

.page-about .about-cta__text {
  margin: 0 0 26px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-about .about-cta__link {
  color: var(--amber);
}

/* ---------- 滚动进入 ---------- */
.js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.js .page-about [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-about .about-facet,
  .page-about .about-facet::before,
  .page-about .about-index__link {
    transition: none;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .about-facets {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .about-trust__row {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-hero__visual {
    justify-content: flex-end;
  }

  .page-about .about-hero__glyph {
    width: min(100%, 420px);
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }

  .page-about .about-timeline {
    padding-left: 44px;
  }

  .page-about .about-timeline::before {
    left: 8px;
  }

  .page-about .about-timeline__item::before {
    left: -44px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 0.84fr) minmax(0, 1.16fr);
  }

  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-trust {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    gap: 40px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-timeline__year {
    font-size: 23px;
  }
}