.page-about {
  --ab-line-dark: rgba(147, 167, 182, 0.22);
  --ab-line-light: rgba(8, 24, 38, 0.14);
  --ab-cut: 18px;
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 16px 0 46px;
  color: var(--paper);
  background:
    radial-gradient(115% 95% at 88% -8%, rgba(201, 162, 75, 0.22), transparent 58%),
    radial-gradient(85% 70% at 0% 108%, rgba(232, 135, 58, 0.14), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-deep) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(147, 167, 182, 0.1) 0 1px, transparent 1px 76px),
    repeating-linear-gradient(0deg, rgba(147, 167, 182, 0.07) 0 1px, transparent 1px 76px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 76%);
}

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

.page-about .about-hero__crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .about-hero__crumb .breadcrumb__link {
  color: var(--mist);
  text-decoration: none;
}

.page-about .about-hero__crumb .breadcrumb__link:hover {
  color: var(--gold-hi);
}

.page-about .about-hero__crumb .breadcrumb__sep {
  color: var(--steel);
}

.page-about .about-hero__crumb .breadcrumb__current {
  color: var(--gold);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
  margin-top: 26px;
}

.page-about .about-hero__text h1 {
  margin: 14px 0 0;
  font-size: 32px;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-stats {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}

.page-about .about-stats li {
  padding-top: 10px;
  border-top: 1px solid var(--ab-line-dark);
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--mono);
  font-size: 24px;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  -webkit-clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, var(--ab-cut) 100%, 0 calc(100% - var(--ab-cut)));
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, var(--ab-cut) 100%, 0 calc(100% - var(--ab-cut)));
  background: var(--ink-panel);
  box-shadow: 0 0 0 1px rgba(201, 162, 75, 0.35);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-hero__plate {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 7px 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-deep);
  background: var(--gold);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin {
  padding: 52px 0;
  color: var(--paper);
  background:
    radial-gradient(90% 80% at 100% 0%, rgba(201, 162, 75, 0.14), transparent 60%),
    linear-gradient(180deg, var(--ink-deep), var(--ink) 55%, var(--ink-panel));
}

.page-about .about-origin__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-origin__body h2 {
  margin: 14px 0 0;
  font-size: 26px;
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-origin__body p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-origin__quote {
  margin-top: 24px;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
  color: var(--gold-hi);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-origin__aside {
  padding: 14px;
  background: rgba(15, 39, 64, 0.72);
  box-shadow: inset 0 0 0 1px var(--ab-line-dark);
}

.page-about .about-origin__figure {
  margin: 0;
}

.page-about .about-origin__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.page-about .about-origin__cap {
  margin: 14px 0 2px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-origin__cap .coord {
  display: block;
  margin-bottom: 6px;
  color: var(--gold);
  letter-spacing: 0.08em;
}

/* ---------- 发展历程 ---------- */
.page-about .about-time {
  padding: 52px 0;
  background: var(--paper);
}

.page-about .about-time__title {
  margin: 14px 0 0;
  font-size: 26px;
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-time__grid {
  display: grid;
  gap: 26px;
  margin-top: 28px;
}

.page-about .about-time__rail {
  display: flex;
  gap: 8px;
  padding-bottom: 10px;
  overflow-x: auto;
  border-bottom: 1px solid var(--ab-line-light);
  scrollbar-width: thin;
}

.page-about .about-time__rail-link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--ink);
  background: var(--paper-pure);
  border: 1px solid var(--ab-line-light);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-time__rail-link .coord {
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-about .about-time__rail-link:hover,
.page-about .about-time__rail-link:focus-visible {
  color: var(--ink-deep);
  border-color: var(--gold);
}

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

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(201, 162, 75, 0.14));
}

.page-about .about-track__item {
  position: relative;
  padding: 0 0 20px 30px;
}

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

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  background: var(--paper);
}

.page-about .about-track__item::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 25px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
}

.page-about .about-track__card {
  padding: 18px 18px 20px;
  background: var(--paper-pure);
  border: 1px solid var(--ab-line-light);
  border-left: 2px solid rgba(201, 162, 75, 0.5);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-track__card:hover {
  border-color: var(--gold);
  transform: translateX(2px);
}

.page-about .about-track__year {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-about .about-track__card h3 {
  margin: 8px 0 0;
  font-size: 17px;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-track__card p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: #2f4356;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: 52px 0;
  background: var(--paper-pure);
  border-top: 1px solid var(--ab-line-light);
  border-bottom: 1px solid var(--ab-line-light);
}

.page-about .about-team__head {
  display: grid;
  gap: 26px;
}

.page-about .about-team__head h2 {
  margin: 14px 0 0;
  font-size: 26px;
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-team__intro {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: #2f4356;
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--ab-line-light);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team__grid {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.page-about .about-team__card {
  padding: 18px 18px 16px;
  background: var(--paper);
  border: 1px solid var(--ab-line-light);
  -webkit-clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .about-team__num {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .about-team__card h3 {
  margin: 6px 0 0;
  font-size: 16px;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-team__card > p {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: #2f4356;
}

.page-about .about-team__card details {
  margin-top: 14px;
  border-top: 1px solid var(--ab-line-light);
  padding-top: 10px;
}

.page-about .about-team__card summary {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--ink-panel);
}

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

.page-about .about-team__card summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--gold);
}

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

.page-about .about-team__card summary:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.page-about .about-team__card details p {
  margin: 10px 0 2px;
  font-size: 13px;
  line-height: 1.8;
  color: #3d5468;
}

/* ---------- 区域覆盖 ---------- */
.page-about .about-cover {
  padding: 52px 0;
  color: var(--paper);
  background:
    radial-gradient(80% 90% at 0% 0%, rgba(232, 135, 58, 0.16), transparent 58%),
    linear-gradient(160deg, var(--ink) 0%, var(--ink-deep) 100%);
}

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

.page-about .about-cover__body h2 {
  margin: 14px 0 0;
  font-size: 26px;
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-cover__body > p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-cover__figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-cover__fig {
  padding-top: 12px;
  border-top: 1px solid rgba(201, 162, 75, 0.45);
}

.page-about .about-cover__num {
  display: block;
  font-family: var(--mono);
  font-size: 22px;
  letter-spacing: 0.02em;
  color: var(--gold-hi);
}

.page-about .about-cover__figlab {
  display: block;
  margin-top: 6px;
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-cover__card {
  padding: 22px 20px;
  background: rgba(15, 39, 64, 0.9);
  box-shadow: inset 0 0 0 1px rgba(201, 162, 75, 0.42);
}

.page-about .about-cover__cardtitle {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .about-cover__addr {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
}

.page-about .about-cover__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-cover__list li {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
  padding-left: 12px;
  border-left: 1px solid rgba(201, 162, 75, 0.4);
}

.page-about .about-cover__list span {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold-hi);
  margin-bottom: 3px;
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  padding: 52px 0;
  background: var(--paper);
}

.page-about .about-eco h2 {
  margin: 14px 0 0;
  font-size: 26px;
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-eco__lede {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: #2f4356;
}

.page-about .about-eco__scroll {
  display: flex;
  gap: 10px;
  margin-top: 26px;
  padding: 4px 0 16px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  border-bottom: 1px solid var(--ab-line-light);
}

.page-about .about-eco__tag {
  flex: 0 0 auto;
  scroll-snap-align: start;
  padding: 8px 14px;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--ink-panel);
  background: var(--paper-pure);
  border: 1px solid var(--ab-line-light);
  -webkit-clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-eco__tag:hover {
  border-color: var(--gold);
  color: var(--ink-deep);
}

.page-about .about-eco__notes {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-eco__note {
  padding: 18px;
  background: var(--paper-pure);
  border: 1px solid var(--ab-line-light);
  border-top: 2px solid var(--gold);
}

.page-about .about-eco__note h3 {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-eco__note p {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: #3d5468;
}

/* ---------- 持续改进 ---------- */
.page-about .about-improve {
  padding: 52px 0;
  color: var(--paper);
  background:
    radial-gradient(90% 80% at 100% 100%, rgba(201, 162, 75, 0.16), transparent 62%),
    var(--ink-panel);
}

.page-about .about-improve h2 {
  margin: 14px 0 0;
  font-size: 26px;
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-improve__lede {
  margin: 16px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-improve__grid {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-improve__stat {
  padding: 18px;
  background: rgba(8, 24, 38, 0.55);
  border: 1px solid var(--ab-line-dark);
}

.page-about .about-improve__num {
  display: block;
  font-family: var(--mono);
  font-size: 30px;
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-about .about-improve__lab {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-improve__foot {
  margin: 24px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--ab-line-dark);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding: 52px 0 60px;
  background: linear-gradient(180deg, var(--ink-deep), var(--ink));
  color: var(--paper);
}

.page-about .about-next h2 {
  margin: 14px 0 0;
  font-size: 26px;
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-next__grid {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-next__card {
  display: block;
  padding: 20px 18px 18px;
  text-decoration: none;
  color: var(--paper);
  background: rgba(15, 39, 64, 0.66);
  border: 1px solid var(--ab-line-dark);
  -webkit-clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  border-color: var(--gold);
  background: rgba(15, 39, 64, 0.95);
}

.page-about .about-next__coord {
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .about-next__card h3 {
  margin: 10px 0 0;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-next__card p {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-next__go {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold-hi);
  border-bottom: 1px solid rgba(201, 162, 75, 0.5);
  padding-bottom: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__lede {
    font-size: 16px;
  }

  .page-about .about-stats__num {
    font-size: 26px;
  }

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

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

  .page-about .about-improve__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 20px 0 64px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: start;
    gap: 44px;
    margin-top: 36px;
  }

  .page-about .about-hero__text h1 {
    font-size: 46px;
    line-height: 1.14;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-origin__body h2,
  .page-about .about-time__title,
  .page-about .about-team__head h2,
  .page-about .about-cover__body h2,
  .page-about .about-eco h2,
  .page-about .about-improve h2,
  .page-about .about-next h2 {
    font-size: 32px;
  }

  .page-about .about-time__grid {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: 44px;
  }

  .page-about .about-time__rail {
    flex-direction: column;
    align-items: stretch;
    overflow: visible;
    position: sticky;
    top: 24px;
    padding: 0 0 0 14px;
    border-bottom: 0;
    border-left: 1px solid var(--ab-line-light);
  }

  .page-about .about-time__rail-link {
    background: transparent;
    border: 0;
    border-left: 2px solid transparent;
    padding: 6px 0 6px 10px;
    margin-left: -15px;
  }

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

  .page-about .about-team__head {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 40px;
    align-items: center;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-eco__notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__text h1 {
    font-size: 52px;
  }

  .page-about .about-hero__lede {
    font-size: 17px;
  }
}
<<<END>>>