.page-about {
  background:
    radial-gradient(900px 480px at 88% 0%, rgba(51, 224, 194, 0.10), transparent 65%),
    radial-gradient(720px 420px at 0% 34%, rgba(255, 106, 43, 0.07), transparent 70%),
    var(--forest);
  color: var(--sand);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .breadcrumb {
  padding: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-about .breadcrumb .breadcrumb__item {
  color: var(--mist);
}

.page-about .breadcrumb .breadcrumb__item[aria-current="page"] {
  color: var(--paper);
}

.page-about .breadcrumb a.breadcrumb__item:hover,
.page-about .breadcrumb a.breadcrumb__item:focus-visible {
  color: var(--orange);
}

/* 首屏 */
.page-about .about-hero {
  padding: 26px 0 52px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--ember);
}

.page-about .about-kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  flex: none;
  background: var(--orange);
}

.page-about h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(32px, 8vw, 58px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__intro {
  max-width: 56ch;
  margin: 0 0 26px;
  font-size: 16px;
  color: var(--sand);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  margin: 0 0 26px;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--paper);
}

.page-about .about-stat__num--accent {
  color: var(--orange);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

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

.page-about .about-hero__plate {
  position: relative;
  z-index: 0;
}

.page-about .about-hero__figure {
  position: relative;
  z-index: 1;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--pine);
}

.page-about .about-hero__figure .media__img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.85);
}

.page-about .media__caption {
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  background: var(--ink);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* 双栏主体 */
.page-about .about-body {
  display: grid;
  gap: 36px;
  padding-bottom: 8px;
}

.page-about .about-block {
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

.page-about .about-block:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-block h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(23px, 5vw, 32px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-block p {
  max-width: 64ch;
  margin: 0 0 14px;
  color: var(--sand);
}

.page-about .about-block__lede {
  color: var(--mist);
}

/* 服务矩阵 */
.page-about .about-services {
  display: grid;
  gap: 1px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-about .about-service {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 18px 16px;
  background: var(--pine);
  transition: background var(--ease), box-shadow var(--ease);
}

.page-about .about-service:hover,
.page-about .about-service:focus-within {
  background: var(--moss);
  box-shadow: inset 2px 0 0 var(--orange);
}

.page-about .about-service__no {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-service h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0;
  color: var(--paper);
}

.page-about .about-service p {
  max-width: 60ch;
  margin: 0 0 8px;
  font-size: 15px;
  color: var(--sand);
}

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

.page-about .about-service__scene {
  font-size: 13.5px;
  color: var(--mist);
}

.page-about .about-service__scene span {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 7px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ember);
}

.page-about .about-services__more {
  margin: 14px 0 0;
  font-size: 14px;
}

.page-about .about-link {
  color: var(--ember);
  text-decoration: none;
  border-bottom: 1px solid var(--moss);
  transition: color var(--ease), border-color var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-figure {
  margin: 26px 0 0;
  border: 1px solid var(--line);
  background: var(--pine);
}

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

/* 团队分组 */
.page-about .about-team {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-team__no {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  line-height: 1;
  color: var(--moss);
}

.page-about .about-team h3 {
  margin: 0 0 5px;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-team p {
  max-width: 60ch;
  margin: 0;
  font-size: 14.5px;
  color: var(--mist);
}

/* 侧栏 */
.page-about .about-rail {
  display: grid;
  gap: 26px;
  align-content: start;
}

.page-about .about-rail__sticky {
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(7, 19, 15, 0.55);
}

.page-about .about-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--ember);
}

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

.page-about .about-index li + li {
  border-top: 1px solid var(--line);
}

.page-about .about-index a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 0;
  font-size: 14.5px;
  color: var(--sand);
  text-decoration: none;
  transition: color var(--ease), padding var(--ease);
}

.page-about .about-index a::after {
  content: "→";
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--moss);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--cyan);
  padding-left: 4px;
}

.page-about .about-miles h2 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-miles__list {
  position: relative;
  margin: 16px 0 0;
  padding: 0 0 0 22px;
  list-style: none;
}

.page-about .about-miles__list::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 4px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--orange), var(--cyan));
}

.page-about .about-mile {
  position: relative;
  padding-bottom: 12px;
}

.page-about .about-mile::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--forest);
  border: 1px solid var(--orange);
}

.page-about .about-mile summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  padding: 4px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .about-mile summary::-webkit-details-marker {
  display: none;
}

.page-about .about-mile summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
}

.page-about .about-mile details[open] summary::after {
  content: "–";
}

.page-about .about-mile summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-about .about-mile__year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-about .about-mile__name {
  font-size: 14px;
  color: var(--sand);
}

.page-about .about-mile details p {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-miles__more {
  margin: 14px 0 0;
  font-size: 13.5px;
}

.page-about .about-rail__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--pine);
}

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

/* 服务范围 */
.page-about .about-scope {
  margin-top: 52px;
  padding: 48px 0 56px;
  border-top: 1px solid var(--line);
  background: var(--ink);
}

.page-about .about-scope__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-scope h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(24px, 5vw, 34px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-scope p {
  max-width: 62ch;
  margin: 0 0 14px;
  color: var(--sand);
}

.page-about .about-scope__list {
  display: grid;
  gap: 10px;
  margin: 16px 0 20px;
  padding: 0;
  list-style: none;
}

.page-about .about-scope__list li {
  position: relative;
  max-width: 60ch;
  padding-left: 18px;
  font-size: 14.5px;
  color: var(--sand);
}

.page-about .about-scope__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-about .about-scope__note {
  font-size: 13.5px;
  color: var(--mist);
}

.page-about .about-contact {
  align-self: start;
  padding: 20px 18px;
  border: 1px solid var(--line);
  background: var(--pine);
}

.page-about .about-contact__title {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--ember);
}

.page-about .about-contact__row {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-contact__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-contact__val {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--paper);
  word-break: break-word;
}

.page-about .about-contact__btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  margin-top: 18px;
  text-align: center;
}

@media (min-width: 620px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-service {
    grid-template-columns: 48px minmax(0, 1fr);
    padding: 20px 20px;
  }

  .page-about .about-team__item {
    grid-template-columns: 56px minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about {
    font-size: 17px;
  }

  .page-about .about-hero {
    padding: 34px 0 64px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: center;
    column-gap: 44px;
  }

  .page-about .about-hero__plate::before {
    content: "";
    position: absolute;
    inset: 18px 0 -18px 22px;
    z-index: 0;
    border: 1px solid var(--line);
    background: linear-gradient(150deg, rgba(255, 106, 43, 0.16), rgba(51, 224, 194, 0.07) 62%, transparent);
  }

  .page-about .about-body {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    column-gap: 56px;
    row-gap: 0;
  }

  .page-about .about-block {
    padding-top: 44px;
  }

  .page-about .about-rail {
    align-self: stretch;
  }

  .page-about .about-rail__sticky {
    position: sticky;
    top: 88px;
  }

  .page-about .about-scope {
    margin-top: 64px;
    padding: 60px 0 68px;
  }

  .page-about .about-scope__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    column-gap: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-service,
  .page-about .about-index a,
  .page-about .about-link {
    transition: none;
  }
}