.page-about {
  --about-copy-max: 700px;
  background: var(--mist);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--on-dark);
  padding: clamp(32px, 4.6vw, 64px) 0 clamp(48px, 6vw, 88px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(201, 214, 226, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 214, 226, 0.055) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -140px;
  top: -180px;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(0, 224, 208, 0.16), rgba(0, 224, 208, 0) 68%);
  pointer-events: none;
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__rule {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--fdb) 0%, var(--cyan) 52%, rgba(0, 224, 208, 0) 100%);
}

.page-about .about-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--on-dark-dim);
  margin-bottom: clamp(26px, 3.4vw, 44px);
}

.page-about .about-hero .breadcrumb a {
  color: var(--on-dark-soft);
  text-decoration: none;
  transition: color 180ms var(--ease);
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--cyan);
}

.page-about .about-hero__grid {
  align-items: start;
  row-gap: clamp(32px, 4vw, 48px);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0 0 22px;
  font-size: clamp(27px, 5vw, 50px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 800;
  max-width: 17em;
}

.page-about .about-hero__lead {
  margin: 0 0 18px;
  font-size: clamp(16px, 2vw, 18px);
  line-height: 1.82;
  color: var(--on-dark-soft);
  max-width: 34em;
}

.page-about .about-hero__note {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--fdb);
  font-size: 15px;
  line-height: 1.76;
  color: var(--on-dark-dim);
  max-width: 30em;
}

.page-about .about-facts {
  margin: 0;
  border-top: 1px solid rgba(201, 214, 226, 0.22);
}

.page-about .about-facts__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(201, 214, 226, 0.22);
}

.page-about .about-facts__k {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--on-dark-dim);
}

.page-about .about-facts__v {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

/* ---------- 通用章节 ---------- */
.page-about .about-sec {
  padding: clamp(46px, 5.6vw, 88px) 0;
  background: var(--mist);
}

.page-about .about-sec--alt {
  background: var(--haze);
}

.page-about .section-head {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .section-head__title {
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.32;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.page-about .about-copy {
  max-width: var(--about-copy-max);
}

.page-about .about-copy p {
  margin: 0 0 1.2em;
  font-size: 16.5px;
  line-height: 1.82;
  color: var(--text);
}

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

.page-about .about-copy--tight {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-soft);
  margin: 0;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
}

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

.page-about .about-figure .media__cap {
  margin-top: 10px;
  padding-top: 9px;
  border-top: 1px solid var(--hair);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

.page-about .about-figure--wide {
  margin-bottom: clamp(26px, 3.4vw, 44px);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  row-gap: clamp(28px, 3.6vw, 40px);
}

.page-about .team-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .team-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--hair);
}

.page-about .team-item:first-child {
  border-top: 1px solid var(--hair);
}

.page-about .team-item__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  margin-bottom: 8px;
}

.page-about .team-item__name {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .team-item__count {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fdb);
  background: var(--mist);
  border: 1px solid var(--grid);
  border-radius: 2px;
  padding: 3px 8px;
}

.page-about .team-item__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--text-soft);
}

/* ---------- 流程 ---------- */
.page-about .about-flow-grid {
  row-gap: clamp(28px, 3.6vw, 40px);
}

.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .flow__step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 0 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--hair);
}

.page-about .flow__step:first-child {
  border-top: 1px solid var(--hair);
}

.page-about .flow__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan-deep);
  padding-top: 4px;
}

.page-about .flow__title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .flow__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--text-soft);
}

.page-about .flow__desc a {
  color: var(--cyan-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 133, 124, 0.4);
}

.page-about .flow__desc a:hover {
  color: var(--fdb);
  border-bottom-color: var(--fdb);
}

/* ---------- 年表 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--grid);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 30px 26px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--fdb);
  transition: background 180ms var(--ease);
}

.page-about .timeline__item:hover::before {
  background: var(--cyan);
}

.page-about .timeline__year {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.page-about .timeline__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.42;
}

.page-about .timeline__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--text-soft);
}

/* ---------- 资质 ---------- */
.page-about .about-cred-grid {
  row-gap: clamp(28px, 3.6vw, 40px);
}

.page-about .cred-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .cred-item {
  background: var(--mist);
  padding: 22px 20px;
  border-top: 2px solid var(--fdb);
  transition: border-top-color 180ms var(--ease);
}

.page-about .cred-item:hover {
  border-top-color: var(--cyan);
}

.page-about .cred-item__no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan-deep);
}

.page-about .cred-item__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.42;
}

.page-about .cred-item__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--text-soft);
}

/* ---------- 服务半径 ---------- */
.page-about .about-radius {
  row-gap: clamp(24px, 3vw, 36px);
}

.page-about .about-radius__text {
  margin: 0 0 1.1em;
  font-size: 16px;
  line-height: 1.82;
  color: var(--text);
}

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

.page-about .about-radius__text a {
  color: var(--cyan-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 133, 124, 0.4);
}

.page-about .about-radius__text a:hover {
  color: var(--fdb);
  border-bottom-color: var(--fdb);
}

.page-about .about-metrics {
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .about-metrics .metric {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  background: var(--mist);
  padding: 16px 18px;
}

.page-about .about-metrics .metric__value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fdb);
  line-height: 1;
}

.page-about .about-metrics .metric__label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

/* ---------- 收束 ---------- */
.page-about .about-sec--closing {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--on-dark);
}

.page-about .about-sec--closing::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(201, 214, 226, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 214, 226, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}

.page-about .about-sec--closing > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-closing {
  row-gap: clamp(30px, 4vw, 44px);
}

.page-about .about-closing__eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-closing__title {
  margin: 0 0 22px;
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.26;
  letter-spacing: -0.02em;
  font-weight: 800;
  max-width: 18em;
}

.page-about .about-closing__text {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--on-dark-soft);
  max-width: 36em;
}

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

.page-about .about-next {
  display: grid;
  border-top: 1px solid rgba(201, 214, 226, 0.22);
}

.page-about .about-next__link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(201, 214, 226, 0.22);
  color: var(--on-dark);
  text-decoration: none;
  font-size: 15px;
  transition: color 180ms var(--ease);
}

.page-about .about-next__link:hover {
  color: var(--cyan);
}

.page-about .about-next__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (max-width: 899px) {
  .page-about .grid-12 {
    display: block;
  }

  .page-about .grid-12 > * + * {
    margin-top: 28px;
  }

  .page-about .about-hero__grid > * + * {
    margin-top: 32px;
  }

  .page-about .about-hero__title {
    max-width: none;
  }

  .page-about .cred-list {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 700px) {
  .page-about .cred-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .timeline {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 0 20px;
    border-left: 0;
    border-top: 1px solid var(--grid);
  }

  .page-about .timeline__item {
    padding: 32px 0 0;
  }

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

  .page-about .timeline__item::before {
    left: 0;
    top: -5px;
  }
}