.page-about {
  --about-pad: clamp(64px, 9vw, 128px);
  --about-gap: clamp(20px, 3vw, 40px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--gd-obsidian);
  padding: calc(var(--gd-header-h) + clamp(52px, 9vw, 104px)) 0 clamp(96px, 12vw, 168px);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
}

.page-about .about-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  opacity: .40;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(115% 85% at 10% 14%, rgba(124, 77, 255, .22), transparent 58%),
    radial-gradient(80% 60% at 88% 82%, rgba(0, 209, 255, .14), transparent 62%),
    linear-gradient(180deg, rgba(5, 5, 7, .74) 0%, rgba(5, 5, 7, .88) 54%, var(--gd-obsidian) 100%);
}

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

.page-about .about-hero__crumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-hero__title {
  max-width: 18ch;
  margin: clamp(12px, 2vw, 20px) 0 clamp(20px, 3vw, 30px);
  color: var(--gd-cream);
  text-wrap: balance;
}

.page-about .about-hero__lead {
  max-width: 62ch;
  color: rgba(244, 233, 216, .82);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 4vw, 56px);
  margin: clamp(36px, 5vw, 60px) 0 0;
  padding: clamp(20px, 3vw, 30px) 0 0;
  list-style: none;
  border-top: 1px solid var(--gd-line);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 108px;
}

.page-about .about-fact__num {
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1;
  color: var(--gd-gold-hi);
}

.page-about .about-fact__label {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--gd-haze);
}

.page-about .about-ridge {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  width: 100%;
  height: clamp(52px, 7vw, 104px);
  color: var(--gd-gold);
  opacity: .55;
  pointer-events: none;
}

/* ---------- 发展脉络 ---------- */
.page-about .about-timeline {
  padding: var(--about-pad) 0;
}

.page-about .about-timeline__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.page-about .about-timeline__main > .gd-lead {
  max-width: 58ch;
  margin-top: clamp(14px, 2vw, 22px);
}

.page-about .about-timeline__figure {
  margin: clamp(30px, 5vw, 52px) 0;
  border: 1px solid var(--gd-line);
  border-radius: var(--gd-radius-lg);
  overflow: hidden;
  background: var(--gd-panel);
}

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

.page-about .about-stage {
  position: relative;
  padding: 0 0 clamp(28px, 4vw, 46px) clamp(22px, 3.4vw, 38px);
  border-left: 1px solid var(--gd-line);
}

.page-about .about-stage:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 10px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gd-gold);
  box-shadow: 0 0 0 5px rgba(201, 162, 39, .14);
}

.page-about .about-stage__year {
  display: block;
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--gd-gold);
  margin-bottom: 8px;
}

.page-about .about-stage .gd-h3 {
  margin: 0 0 10px;
  color: var(--gd-cream);
}

.page-about .about-stage .gd-body {
  margin: 0;
  max-width: 60ch;
  color: rgba(244, 233, 216, .74);
}

.page-about .about-rail {
  margin-top: clamp(8px, 2vw, 0px);
}

.page-about .about-rail__title {
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--gd-haze);
  margin: 0 0 14px;
}

.page-about .about-rail__nav {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-about .about-rail__nav .gd-spy__link {
  flex: 0 0 auto;
  white-space: nowrap;
}

/* ---------- 服务原则 ---------- */
.page-about .about-principles {
  padding: var(--about-pad) 0;
}

.page-about .about-section-head {
  max-width: 64ch;
  margin-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-section-head .gd-lead {
  margin-top: clamp(14px, 2vw, 22px);
}

.page-about .about-principle-list {
  border-top: 1px solid var(--gd-line);
}

.page-about .about-principle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(16px, 3vw, 44px);
  align-items: start;
  padding: clamp(24px, 4vw, 42px) clamp(12px, 2vw, 22px);
  border-bottom: 1px solid var(--gd-line-soft);
  border-radius: var(--gd-radius-md);
  transition: background-color .4s var(--gd-ease), border-color .4s var(--gd-ease);
}

.page-about .about-principle:hover,
.page-about .about-principle:focus-within {
  background: linear-gradient(90deg, rgba(201, 162, 39, .08), transparent 72%);
  border-bottom-color: var(--gd-gold);
}

.page-about .about-principle__no {
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.2;
  color: var(--gd-haze);
  transition: color .35s var(--gd-ease);
}

.page-about .about-principle:hover .about-principle__no,
.page-about .about-principle:focus-within .about-principle__no {
  color: var(--gd-gold-hi);
}

.page-about .about-principle__body .gd-h3 {
  margin: 0 0 10px;
  color: var(--gd-cream);
}

.page-about .about-principle__body .gd-body {
  margin: 0;
  max-width: 62ch;
  color: rgba(244, 233, 216, .76);
}

/* ---------- 团队与协作 ---------- */
.page-about .about-team {
  padding: var(--about-pad) 0;
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
  gap: 1px;
  background: var(--gd-line-soft);
  border: 1px solid var(--gd-line);
  border-radius: var(--gd-radius-lg);
  overflow: hidden;
}

.page-about .about-metric {
  background: var(--gd-panel);
  padding: clamp(20px, 3vw, 32px);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-metric__num {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
  color: var(--gd-gold-hi);
}

.page-about .about-metric__unit {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--gd-gold);
}

.page-about .about-metric__desc {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gd-haze);
}

.page-about .about-partners {
  margin-top: clamp(32px, 5vw, 56px);
  padding-top: clamp(24px, 4vw, 40px);
  border-top: 1px solid var(--gd-line);
}

.page-about .about-partners .gd-h3 {
  margin: 0 0 18px;
  color: var(--gd-cream);
}

.page-about .about-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
}

.page-about .about-chips .gd-chip {
  transition: transform .3s var(--gd-ease), border-color .3s var(--gd-ease), color .3s var(--gd-ease);
}

.page-about .about-chips .gd-chip:hover {
  transform: translateY(-2px);
  border-color: var(--gd-neon);
  color: var(--gd-cream);
}

.page-about .about-partners .gd-body {
  max-width: 64ch;
  color: rgba(244, 233, 216, .76);
}

/* ---------- 资质与荣誉 ---------- */
.page-about .about-honors {
  padding: var(--about-pad) 0;
}

.page-about .about-honor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: clamp(16px, 2.4vw, 28px);
}

.page-about .about-badge {
  position: relative;
  padding: clamp(24px, 3vw, 36px);
  border: 1px solid var(--gd-line);
  border-radius: var(--gd-radius-lg);
  background: linear-gradient(158deg, rgba(27, 20, 8, .92), rgba(5, 5, 7, .96));
  overflow: hidden;
  transition: transform .45s var(--gd-ease), box-shadow .45s var(--gd-ease), border-color .45s var(--gd-ease);
}

.page-about .about-badge::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 209, 255, .18), transparent 68%);
  opacity: 0;
  transition: opacity .45s var(--gd-ease);
}

.page-about .about-badge:hover,
.page-about .about-badge:focus-within {
  transform: translateY(-6px);
  border-color: var(--gd-gold);
  box-shadow: var(--gd-shadow-gold);
}

.page-about .about-badge:hover::after,
.page-about .about-badge:focus-within::after {
  opacity: 1;
}

.page-about .about-badge__mark {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--gd-gold);
  padding: 5px 14px;
  border: 1px solid var(--gd-line);
  border-radius: var(--gd-radius-pill);
  margin-bottom: 18px;
}

.page-about .about-badge .gd-h3 {
  margin: 0 0 12px;
  color: var(--gd-cream);
  font-size: clamp(19px, 2.2vw, 24px);
}

.page-about .about-badge__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--gd-haze);
}

/* ---------- 为什么选择我们 ---------- */
.page-about .about-why {
  position: relative;
  overflow: hidden;
  background: var(--gd-obsidian);
  padding: var(--about-pad) 0;
}

.page-about .about-why__bg {
  position: absolute;
  inset: 0;
}

.page-about .about-why__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .26;
}

.page-about .about-why::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(90% 70% at 82% 18%, rgba(201, 162, 39, .16), transparent 60%),
    linear-gradient(180deg, rgba(5, 5, 7, .88), rgba(5, 5, 7, .96));
}

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

.page-about .about-why__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 22px);
  margin-top: clamp(30px, 4vw, 48px);
}

.page-about .about-why__card {
  padding: clamp(22px, 3vw, 32px);
  transition: transform .45s var(--gd-ease), box-shadow .45s var(--gd-ease);
}

.page-about .about-why__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--gd-shadow-gold);
}

.page-about .about-why__card .gd-h3 {
  margin: 0 0 10px;
  color: var(--gd-cream);
}

.page-about .about-why__card .gd-card__text {
  margin: 0;
  color: rgba(244, 233, 216, .78);
}

.page-about .about-why__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(12px, 2vw, 20px);
  margin-top: clamp(32px, 4vw, 52px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--gd-line);
}

.page-about .gd-link-inline {
  font-size: 15px;
  color: var(--gd-electric);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--gd-ease), color .3s var(--gd-ease);
}

.page-about .gd-link-inline:hover {
  color: var(--gd-gold-hi);
  border-bottom-color: currentColor;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-why__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-why__card:nth-child(even) {
    transform: translateY(18px);
  }

  .page-about .about-why__card:nth-child(even):hover {
    transform: translateY(12px);
  }
}

@media (min-width: 960px) {
  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 1fr) minmax(190px, 250px);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--gd-header-h) + 28px);
    margin-top: 0;
    padding-left: clamp(16px, 2vw, 28px);
    border-left: 1px solid var(--gd-line);
  }

  .page-about .about-rail__nav {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-hero__title {
    font-size: clamp(56px, 7vw, 104px);
  }
}

@media (max-width: 719px) {
  .page-about .about-hero {
    padding-bottom: clamp(80px, 18vw, 120px);
  }

  .page-about .about-hero__facts {
    gap: 18px 28px;
  }

  .page-about .about-principle {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .page-about .about-why__cta .gd-btn {
    flex: 1 1 auto;
  }
}
<<<END>>>