.page-about {
  background: var(--c-navy);
  color: var(--text-body);
  overflow-x: hidden;
}

.page-about .media {
  margin: 0;
  border: 1px solid rgba(217, 201, 168, 0.20);
  border-radius: var(--radius);
  background: rgba(15, 46, 51, 0.5);
  box-shadow: var(--shadow-card);
}

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

.page-about .section-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.2vw, 2.25rem);
  line-height: 1.28;
  color: var(--c-ivory);
  margin: 0.35rem 0 0;
  letter-spacing: 0.01em;
}

.page-about p {
  line-height: 1.85;
}

.page-about .about-inline-link {
  color: var(--c-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 164, 93, 0.45);
  padding-bottom: 1px;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

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

/* 首屏 */
.page-about .about-hero {
  padding-block: clamp(2rem, 5.5vw, 4.25rem) clamp(2rem, 5vw, 3.5rem);
  background:
    radial-gradient(95% 130% at 6% -12%, rgba(122, 31, 43, 0.50) 0%, rgba(11, 27, 43, 0) 58%),
    radial-gradient(70% 95% at 100% 0%, rgba(15, 46, 51, 0.95) 0%, rgba(11, 27, 43, 0) 62%),
    var(--c-navy);
  border-bottom: 1px solid rgba(200, 164, 93, 0.28);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 2.75rem);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5.4vw, 3.4rem);
  line-height: 1.2;
  font-weight: 700;
  color: var(--c-ivory);
  margin: 0.5rem 0 0;
  letter-spacing: 0.005em;
}

.page-about .about-hero__lead {
  margin: 1.1rem 0 0;
  max-width: 48ch;
  font-size: clamp(1rem, 1.3vw, 1.0625rem);
  color: var(--text-body);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.6rem;
}

.page-about .about-index {
  border: 1px solid rgba(200, 164, 93, 0.35);
  border-radius: var(--radius);
  background: linear-gradient(168deg, rgba(15, 46, 51, 0.94) 0%, rgba(11, 27, 43, 0.94) 100%);
  padding: 1.1rem 1.15rem 1.25rem;
  box-shadow: var(--shadow-card);
}

.page-about .about-index__title {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gold);
  line-height: 1.4;
}

.page-about .about-index dl {
  margin: 0;
  display: grid;
  gap: 0.65rem;
}

.page-about .about-index dl > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid rgba(217, 201, 168, 0.14);
}

.page-about .about-index dl > div:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .about-index dt {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.page-about .about-index dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.02rem;
  color: var(--c-ivory);
  letter-spacing: 0.03em;
  white-space: nowrap;
}

/* 历程 */
.page-about .about-story {
  padding-block: clamp(2.2rem, 5vw, 4rem);
}

.page-about .about-story__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 2.75rem);
}

.page-about .about-story__main p {
  margin: 0 0 1rem;
  color: var(--text-body);
  font-size: 1rem;
}

.page-about .about-story__main .section-title + p {
  margin-top: 1.1rem;
}

.page-about .about-story__figure {
  margin: 1.5rem 0 1.6rem;
}

.page-about .about-aside {
  padding-top: 0.25rem;
  border-top: 1px solid rgba(200, 164, 93, 0.3);
}

.page-about .about-aside__title {
  margin: 0.9rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gold);
  font-weight: 400;
  line-height: 1.4;
}

.page-about .tl {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(200, 164, 93, 0.6) 0%, rgba(200, 164, 93, 0.10) 100%);
}

.page-about .tl > li {
  position: relative;
  padding: 0 0 0 1.55rem;
  margin-bottom: 1.05rem;
}

.page-about .tl > li:last-child {
  margin-bottom: 0;
}

.page-about .tl > li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.42rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-navy);
  border: 1.5px solid var(--c-gold);
  transition: background-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-about .tl > li:hover::before,
.page-about .tl > li:focus-within::before {
  background: var(--c-gold);
  box-shadow: 0 0 0 4px rgba(200, 164, 93, 0.18);
}

.page-about .tl__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--c-gold);
}

.page-about .tl__title {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.95rem;
  color: var(--c-ivory);
  line-height: 1.5;
}

.page-about .tl__desc {
  display: block;
  margin-top: 0.28rem;
  font-size: 0.81rem;
  line-height: 1.65;
  color: var(--text-muted);
  transition: color 200ms var(--ease);
}

.page-about .tl > li:hover .tl__desc,
.page-about .tl > li:focus-within .tl__desc {
  color: var(--c-cream);
}

/* 服务范围横向带 */
.page-about .about-band {
  padding-block: clamp(2rem, 5vw, 3.6rem);
  background:
    linear-gradient(115deg, rgba(122, 31, 43, 0.28) 0%, rgba(11, 27, 43, 0) 48%),
    var(--c-teal);
  border-top: 1px solid rgba(200, 164, 93, 0.24);
  border-bottom: 1px solid rgba(200, 164, 93, 0.24);
}

.page-about .about-band__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 2.75rem);
  align-items: center;
}

.page-about .about-band__text p {
  margin: 1rem 0 0;
  font-size: 0.98rem;
  color: var(--text-body);
}

.page-about .about-regions {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.25rem 0 0;
  padding: 0;
}

.page-about .about-regions li {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  padding: 0.32rem 0.62rem;
  border: 1px solid rgba(217, 201, 168, 0.26);
  border-radius: 999px;
  color: var(--c-cream);
  line-height: 1.4;
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-about .about-regions li:hover {
  border-color: var(--c-gold);
  color: var(--c-ivory);
}

.page-about .about-regions li.is-key {
  border-color: rgba(200, 164, 93, 0.72);
  background: rgba(122, 31, 43, 0.42);
  color: var(--c-ivory);
}

.page-about .about-band__media {
  width: 100%;
}

.page-about .about-band__media img {
  aspect-ratio: 12 / 7;
}

/* 团队 */
.page-about .about-team {
  padding-block: clamp(2.2rem, 5vw, 4rem);
}

.page-about .about-team__head .section-desc {
  margin: 1rem 0 0;
  max-width: 62ch;
  font-size: 0.98rem;
  color: var(--text-body);
}

.page-about .about-team__stats {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(217, 201, 168, 0.18);
  border: 1px solid rgba(217, 201, 168, 0.18);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-team__stats > li {
  background: var(--c-navy);
  padding: 1.15rem 1.1rem 1.3rem;
  display: grid;
  gap: 0.3rem;
  transition: background-color 200ms var(--ease);
}

.page-about .about-team__stats > li:hover {
  background: rgba(15, 46, 51, 0.85);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  line-height: 1;
  color: var(--c-gold);
  letter-spacing: 0.02em;
}

.page-about .about-team__label {
  font-size: 0.95rem;
  color: var(--c-ivory);
  letter-spacing: 0.02em;
}

.page-about .about-team__note {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.page-about .about-team__foot {
  margin: 1.25rem 0 0;
  padding: 0.9rem 0 0.9rem 1rem;
  border-left: 2px solid var(--c-celadon);
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--text-muted);
}

/* 服务原则 */
.page-about .about-principles {
  padding-block: clamp(2.2rem, 5vw, 4rem);
  background: linear-gradient(180deg, rgba(11, 27, 43, 0) 0%, rgba(15, 46, 51, 0.55) 100%);
  border-top: 1px solid rgba(217, 201, 168, 0.14);
}

.page-about .about-principles__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 2.75rem);
  align-items: start;
}

.page-about .about-principles__main .section-desc {
  margin: 1rem 0 0;
  max-width: 52ch;
  font-size: 0.98rem;
  color: var(--text-body);
}

.page-about .about-principles__list {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.page-about .about-principles__list > li {
  border-left: 2px solid rgba(200, 164, 93, 0.45);
  padding: 0.1rem 0 0.1rem 1rem;
  transition: border-color 180ms var(--ease);
}

.page-about .about-principles__list > li:hover {
  border-left-color: var(--c-gold);
}

.page-about .about-principles__list h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--c-ivory);
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  line-height: 1.5;
}

.page-about .about-principles__idx {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--c-gold);
  font-weight: 400;
}

.page-about .about-principles__list p {
  margin: 0.4rem 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.page-about .about-principles__media {
  width: 100%;
}

.page-about .about-principles__media img {
  aspect-ratio: 4 / 5;
}

/* 合作生态 */
.page-about .about-eco {
  padding-block: clamp(2.2rem, 5vw, 4rem);
}

.page-about .about-eco__head .section-desc {
  margin: 1rem 0 0;
  max-width: 60ch;
  font-size: 0.98rem;
  color: var(--text-body);
}

.page-about .about-eco__grid {
  margin-top: 1.75rem;
}

.page-about .about-eco__card {
  padding: 1.15rem 1.1rem 1.3rem;
  display: grid;
  gap: 0.45rem;
  align-content: start;
}

.page-about .about-eco__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--c-gold);
  line-height: 1.4;
}

.page-about .about-eco__card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--c-ivory);
  line-height: 1.5;
}

.page-about .about-eco__card p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-about .about-eco__honor {
  margin: 1.5rem 0 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--c-cream);
}

.page-about .about-eco__honor-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  padding: 0.28rem 0.55rem;
  border: 1px solid rgba(111, 158, 142, 0.65);
  border-radius: 999px;
  color: var(--c-celadon);
  line-height: 1.4;
}

/* 结尾通道 */
.page-about .about-cta {
  padding-block: clamp(2.2rem, 5vw, 3.75rem);
  background:
    radial-gradient(90% 140% at 100% 0%, rgba(122, 31, 43, 0.45) 0%, rgba(11, 27, 43, 0) 62%),
    var(--c-navy);
  border-top: 1px solid rgba(200, 164, 93, 0.3);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  align-items: center;
}

.page-about .about-cta__desc {
  margin: 0.9rem 0 0;
  max-width: 50ch;
  font-size: 0.95rem;
  color: var(--text-body);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

@media (min-width: 720px) {
  .page-about .about-team__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(240px, 0.58fr);
    align-items: end;
  }

  .page-about .about-band__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.85fr);
  }

  .page-about .about-principles__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.6fr);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 2rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-story__grid {
    grid-template-columns: minmax(0, 1fr) 292px;
    gap: clamp(2rem, 4vw, 3rem);
  }

  .page-about .about-aside {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
    align-self: start;
    border-top: none;
    border-left: 1px solid rgba(200, 164, 93, 0.3);
    padding: 0.2rem 0 0 1.1rem;
    max-height: calc(100vh - var(--header-h) - 3rem);
    overflow-y: auto;
  }

  .page-about .about-aside__title {
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl > li::before,
  .page-about .tl__desc,
  .page-about .about-regions li,
  .page-about .about-team__stats > li,
  .page-about .about-principles__list > li,
  .page-about .about-inline-link {
    transition: none;
  }
}