/* 关于页：以极区勘探记录为视觉线索，保持全站字体与配色体系。 */

.about-hero {
  padding: calc(var(--header-h) + 64px) 0 38px;
  background:
    radial-gradient(circle at 76% 39%, rgba(65, 113, 161, .22), transparent 36%),
    linear-gradient(126deg, #081a2d 8%, #0d2944 56%, #07192b 100%);
}

.about-hero::before {
  opacity: .46;
}

.about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(360px, .82fr);
  align-items: center;
  gap: clamp(38px, 5vw, 76px);
}

.about-hero-copy {
  padding: 12px 0 22px;
}

.about-hero h1 {
  max-width: 14em;
  margin-top: 28px;
  font-size: clamp(2.45rem, 3.85vw, 3.55rem);
  line-height: 1.24;
  letter-spacing: -.055em;
}

.about-hero h1 em {
  color: #b8d3ff;
  white-space: nowrap;
}

.about-hero .lead {
  max-width: 43ch;
  margin-top: 30px;
  font-size: 15px;
  line-height: 1.95;
  color: rgba(235, 243, 252, .74);
}

.about-hero-link {
  display: inline-flex;
  gap: 25px;
  align-items: center;
  margin-top: 32px;
  padding: 0 0 8px;
  border-bottom: 1px solid rgba(184, 211, 255, .52);
  color: #e3efff;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .08em;
  transition: gap .25s var(--ease), border-color .25s var(--ease);
}

.about-hero-link:hover {
  gap: 32px;
  border-color: #e3efff;
}

.about-hero-link span {
  font-size: 17px;
  line-height: 1;
}

.about-hero .crumbs {
  margin-top: 28px;
  color: rgba(235, 243, 252, .45);
}

.about-polar-image {
  position: relative;
  align-self: stretch;
  min-width: 0;
  min-height: 444px;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(188, 216, 246, .16);
  background: #0a1c2f;
  box-shadow: 0 24px 72px rgba(0, 7, 17, .22);
}

.about-polar-image img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 52% 50%;
  filter: saturate(.72) contrast(1.04);
}

.about-polar-image::after {
  content: "";
  position: absolute;
  inset: 36% 0 0;
  background: linear-gradient(transparent, rgba(4, 15, 27, .2) 24%, rgba(4, 15, 27, .9));
  pointer-events: none;
}

.about-polar-image figcaption {
  position: absolute;
  z-index: 1;
  left: 28px;
  right: 28px;
  bottom: 27px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.about-image-kicker {
  margin-bottom: 10px;
  color: #ddc39e;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .17em;
}

.about-polar-image figcaption strong {
  color: #fff;
  font-size: clamp(1.45rem, 2.1vw, 1.8rem);
  font-weight: 500;
  letter-spacing: -.025em;
  line-height: 1.3;
}

.about-image-note {
  margin-top: 10px;
  color: rgba(239, 245, 251, .66);
  font-size: 11px;
}

.about-facts {
  border-bottom: 1px solid var(--line);
  background: #f0f5fa;
}

.about-facts-inner {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.about-facts-inner > div {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 25px 28px 25px 0;
  border-right: 1px solid #dce5ef;
}

.about-facts-inner > div + div {
  padding-left: 28px;
}

.about-facts-inner > div:last-child {
  border-right: 0;
}

.about-facts strong {
  font-family: var(--mono);
  font-size: 27px;
  line-height: 1.2;
  font-weight: 400;
  letter-spacing: -.04em;
  color: #14395d;
}

.about-facts span {
  font-size: 12px;
  color: var(--muted);
}

.about-mission .section-head,
.about-timeline .section-head,
.about-facilities .section-head,
.about-team .section-head,
.about-standards .section-head {
  padding-bottom: 48px;
}

.about-mission .section-index,
.about-timeline .section-index,
.about-facilities .section-index,
.about-team .section-index {
  color: #517291;
}

.about-mission .principle-grid {
  gap: 14px;
  border-top: 0;
}

.about-mission .principle,
.about-mission .principle:last-child {
  min-height: 224px;
  padding: 30px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, #fff 68%, #f6f9fd);
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.about-mission .principle:hover {
  border-color: #a9bfda;
  transform: translateY(-3px);
}

.about-mission .principle .idx {
  color: #94704a;
}

.about-mission .principle h3 {
  margin-top: 35px;
  font-size: 20px;
}

.about-quote-wrap {
  position: relative;
  margin-top: 24px;
  padding: 46px 55px 50px;
  overflow: hidden;
  background: linear-gradient(115deg, #0c2a47, #061727 80%);
  color: #fff;
}

.about-quote-wrap::after {
  content: "“";
  position: absolute;
  right: 48px;
  bottom: -100px;
  font-family: Georgia, serif;
  font-size: 280px;
  line-height: 1;
  color: rgba(181, 212, 247, .08);
  pointer-events: none;
}

.about-quote-index {
  display: block;
  margin-bottom: 24px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .18em;
  color: #dfbf93;
}

.about-quote-wrap .pull-quote {
  position: relative;
  z-index: 1;
  max-width: 30em;
  padding-left: 0;
  border: 0;
  color: #f3f7fc;
  font-size: clamp(1.45rem, 2.6vw, 2.1rem);
  line-height: 1.6;
}

.about-quote-wrap .pull-quote footer {
  margin-top: 25px;
  color: #a9c3dd;
}

.about-timeline {
  background: #f3f7fa;
}

.about-timeline .timeline {
  border-top: 1px solid #dce6ef;
}

.about-timeline .tl-item {
  padding: 27px 24px 27px 0;
  border-bottom: 1px solid #dce6ef;
  transition: background .25s var(--ease), padding-left .25s var(--ease);
}

.about-timeline .tl-item:hover {
  padding-left: 14px;
  background: rgba(255, 255, 255, .8);
}

.about-timeline .tl-year {
  color: #1a4266;
  font-size: 20px;
}

.about-timeline .tl-body h3 {
  font-size: 18px;
  font-weight: 600;
}

.about-timeline .tl-item--future {
  border-bottom: 0;
}

.about-timeline .tl-item--future .tl-year {
  color: #8d6742;
}

.about-timeline .tl-item--future .tl-year::after {
  border-color: #c9a97e;
}

.about-timeline .tl-item--future h3::after {
  content: "计划";
  display: inline-block;
  margin-left: 10px;
  padding: 3px 7px;
  border: 1px solid #dccbb7;
  color: #8d6742;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .12em;
  vertical-align: middle;
}

.about-facilities .fac-grid {
  gap: 16px;
}

.about-facilities .fac-card {
  position: relative;
  min-height: 345px;
  padding: 27px;
  overflow: hidden;
}

.fac-card-no {
  display: block;
  margin-bottom: 30px;
  color: #5c7790;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .18em;
}

.about-facilities .fac-icon {
  margin-bottom: 18px;
}

.about-facilities .fac-card h3 {
  margin: 10px 0 13px;
  font-size: 19px;
}

.about-facilities .fac-card:first-child {
  border-color: #0e2a46;
  background: radial-gradient(circle at 95% 15%, #24476a, #0c2540 58%, #081b2f);
  color: #f1f7ff;
}

.about-facilities .fac-card:first-child .fac-card-no,
.about-facilities .fac-card:first-child .fac-meta,
.about-facilities .fac-card:first-child .fac-icon {
  color: #bcd6ef;
}

.about-facilities .fac-card:first-child p {
  color: rgba(237, 246, 255, .7);
}

.about-facilities .fac-card:first-child .fac-spec li {
  background: rgba(204, 226, 247, .12);
  color: #e0edfa;
}

.about-team {
  background: #edf3f8;
}

.about-team .team-grid {
  gap: 16px;
}

.about-team .team-card {
  padding: 0 0 27px;
  border: 1px solid #dce6ef;
  background: #fff;
}

.about-team .team-photo {
  aspect-ratio: 1.2 / 1;
  margin-bottom: 21px;
  background:
    repeating-linear-gradient(0deg, transparent 0 38px, rgba(193, 219, 243, .07) 39px 40px),
    repeating-linear-gradient(90deg, transparent 0 38px, rgba(193, 219, 243, .07) 39px 40px),
    linear-gradient(145deg, #173956, #071a2d);
}

.about-team .team-card:nth-child(2) .team-photo {
  background-color: #172f45;
  background-image: radial-gradient(circle at 78% 22%, rgba(161, 197, 227, .22), transparent 40%), linear-gradient(145deg, #224363, #10253c);
}

.about-team .team-card:nth-child(3) .team-photo {
  background-color: #24394b;
  background-image: radial-gradient(circle at 20% 75%, rgba(209, 182, 144, .17), transparent 42%), linear-gradient(145deg, #324e63, #142a3e);
}

.about-team .team-card:nth-child(4) .team-photo {
  background-color: #10293e;
  background-image: radial-gradient(circle at 80% 78%, rgba(120, 178, 218, .2), transparent 42%), linear-gradient(145deg, #1b3b59, #0a1c30);
}

.about-team .team-photo::before {
  left: 50%;
  top: 50%;
  right: auto;
  width: 185px;
  height: 185px;
  border: 1px solid rgba(197, 221, 245, .21);
  border-radius: 50%;
  background: none;
  opacity: 1;
  box-shadow: 0 0 0 25px rgba(197, 221, 245, .04), 0 0 0 51px rgba(197, 221, 245, .035);
  transform: translate(-50%, -50%);
}

.about-team .team-photo::after {
  inset: auto 20px 20px auto;
  width: 28px;
  height: 1px;
  background: #d5b17c;
}

.about-team .team-photo span {
  color: #f0f6fd;
  font-size: 64px;
  font-weight: 300;
  opacity: .95;
}

.team-card-index,
.about-team .team-name,
.about-team .team-role,
.about-team .team-bio {
  margin-left: 22px;
  margin-right: 22px;
}

.team-card-index {
  display: block;
  margin-bottom: 10px;
  color: #7992a9;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .13em;
}

.about-team .team-name {
  font-size: 20px;
  font-weight: 600;
}

.about-team .team-bio {
  margin-top: 15px;
}

.about-standards {
  background: linear-gradient(120deg, #061626, #0d2a45);
}

.about-standards .flow-step {
  padding-right: 34px;
}

.about-standards .flow-foot {
  color: rgba(233, 241, 253, .54);
}

@media (max-width: 1050px) {
  .about-hero-grid {
    grid-template-columns: 1fr minmax(300px, .78fr);
    gap: 30px;
  }

  .about-hero h1 {
    font-size: clamp(2.2rem, 4.3vw, 3rem);
  }

  .about-polar-image {
    min-height: 385px;
  }
}

@media (max-width: 850px) {
  .about-hero-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .about-hero-copy {
    padding-bottom: 0;
  }

  .about-hero h1 {
    font-size: clamp(2.3rem, 6vw, 3.25rem);
  }

  .about-hero .lead {
    max-width: 62ch;
  }

  .about-polar-image {
    width: min(100%, 580px);
    min-height: 405px;
  }
}

@media (max-width: 760px) {
  .about-hero {
    padding: calc(var(--header-h) + 40px) 0 32px;
  }

  .about-hero h1 {
    margin-top: 19px;
    font-size: clamp(2.15rem, 8vw, 2.9rem);
    line-height: 1.3;
  }

  .about-hero h1 em {
    white-space: normal;
  }

  .about-hero .lead {
    margin-top: 22px;
    font-size: 14px;
  }

  .about-hero-link {
    margin-top: 24px;
  }

  .about-polar-image {
    min-height: 330px;
  }

  .about-polar-image figcaption {
    left: 20px;
    right: 20px;
    bottom: 20px;
  }

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

  .about-facts-inner > div,
  .about-facts-inner > div + div {
    min-height: 93px;
    padding: 19px 16px 18px 0;
    border-bottom: 1px solid #dce5ef;
  }

  .about-facts-inner > div:nth-child(even) {
    padding-left: 18px;
    border-right: 0;
  }

  .about-facts-inner > div:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .about-facts strong {
    font-size: 23px;
  }

  .about-mission .section-head,
  .about-timeline .section-head,
  .about-facilities .section-head,
  .about-team .section-head,
  .about-standards .section-head {
    padding-bottom: 32px;
  }

  .about-mission .principle-grid {
    gap: 10px;
  }

  .about-mission .principle,
  .about-mission .principle:last-child {
    min-height: auto;
    padding: 24px;
  }

  .about-mission .principle h3 {
    margin-top: 19px;
  }

  .about-quote-wrap {
    padding: 34px 28px 38px;
  }

  .about-timeline .timeline::before {
    left: 4px;
  }

  .about-timeline .tl-item {
    padding: 20px 10px 20px 26px;
  }

  .about-timeline .tl-item:hover {
    padding-left: 26px;
  }

  .about-facilities .fac-card {
    min-height: 0;
  }

  .about-team .team-photo {
    aspect-ratio: 1.4 / 1;
  }
}

@media (max-width: 420px) {
  .about-hero h1 {
    font-size: 2.2rem;
  }

  .about-polar-image {
    min-height: 290px;
  }

  .about-team .team-photo {
    aspect-ratio: 1.8 / 1;
  }
}