.page-about {
  --about-index-w: 208px;
  --about-gap: 40px;
  background-color: var(--ink-800);
  color: var(--cream);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 52px;
  background:
    radial-gradient(120% 88% at 84% 0%, rgba(0, 229, 199, 0.14), transparent 62%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  border-bottom: 1px solid var(--hair);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(to right, rgba(126, 156, 146, 0.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(126, 156, 146, 0.09) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 34px;
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(30px, 7.2vw, 58px);
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--cream);
}

.page-about .about-hero__text {
  margin: 0 0 26px;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.95;
  color: rgba(245, 240, 230, 0.78);
}

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

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

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .about-crumbs .breadcrumbs__item {
  display: inline-flex;
  align-items: center;
}

.page-about .about-crumbs .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 6px;
  color: rgba(126, 156, 146, 0.55);
}

.page-about .about-crumbs .breadcrumbs__link {
  color: var(--sage);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

.page-about .breadcrumbs__current {
  color: var(--cream);
}

/* ---------- 媒体框 ---------- */
.page-about .media-frame {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  background-color: var(--ink-900);
  border: 1px solid var(--hair-cyan);
}

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

.page-about .media-frame__caption {
  display: block;
  padding: 10px 14px;
  font-size: 11.5px;
  letter-spacing: 0.09em;
  color: var(--sage);
  background: rgba(5, 32, 29, 0.86);
  border-top: 1px solid var(--hair);
}

/* ---------- 主体布局 ---------- */
.page-about .about-layout {
  padding-top: 48px;
  padding-bottom: 56px;
}

.page-about .about-index {
  position: relative;
  margin-bottom: 40px;
  padding-left: 14px;
}

.page-about .about-index::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, transparent 78%);
  opacity: 0.45;
}

.page-about .about-index__title {
  margin: 0 0 14px;
}

.page-about .about-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 10px;
  font-size: 12.5px;
  color: var(--sage);
  text-decoration: none;
  border: 1px solid var(--hair);
  background: rgba(15, 58, 51, 0.5);
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--cyan);
  border-color: var(--hair-cyan);
  background: rgba(13, 74, 64, 0.6);
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--amber);
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding-bottom: 52px;
  margin-bottom: 52px;
  border-bottom: 1px solid var(--hair);
}

.page-about .about-section:last-child {
  padding-bottom: 8px;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-about .about-section__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 22px;
}

.page-about .about-section__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(21px, 4.4vw, 33px);
  line-height: 1.22;
  color: var(--cream);
}

.page-about .about-section__head::after {
  content: "";
  flex: 1 1 auto;
  min-width: 28px;
  height: 1px;
  background: linear-gradient(90deg, var(--hair-cyan), transparent);
}

.page-about .about-section p {
  margin: 0 0 16px;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.95;
  color: rgba(245, 240, 230, 0.8);
}

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

/* ---------- 定位三卡 ---------- */
.page-about .about-cards {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-card {
  padding: 20px 20px 22px;
  background: var(--ink-700);
  border: 1px solid var(--hair);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.page-about .about-card:hover {
  border-color: var(--hair-cyan);
  background: var(--grad-start);
}

.page-about .about-card__no {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .about-card__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .about-card__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--sage);
}

/* ---------- 数据覆盖 ---------- */
.page-about .about-stats {
  display: grid;
  gap: 1px;
  margin: 26px 0 30px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .about-stats__item {
  padding: 20px 18px;
  background: var(--ink-800);
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 5.2vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-stats__num--amber {
  color: var(--amber);
}

.page-about .about-stats__unit {
  margin-left: 3px;
  font-size: 0.44em;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--sage);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--cream);
}

.page-about .about-stats__note {
  display: block;
  margin-top: 6px;
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--sage);
}

.page-about .about-figure {
  margin: 30px 0 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-team__panel {
  position: relative;
  padding: 24px 20px 24px;
  background: var(--ink-700);
  border: 1px solid var(--hair);
  overflow: hidden;
}

.page-about .about-team__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent 62%);
  opacity: 0.75;
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .about-team__role {
  margin: 14px 0 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--cream);
}

.page-about .about-team__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--sage);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 28px 0 30px;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--grad-start) 48%, transparent 100%);
  opacity: 0.6;
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 24px;
}

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

.page-about .about-timeline__dot {
  position: absolute;
  left: -26px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 2px solid var(--cyan);
  background: var(--ink-800);
  transition: background-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-timeline__item:hover .about-timeline__dot,
.page-about .about-timeline__item:focus-within .about-timeline__dot {
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(0, 229, 199, 0.16);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-about .about-timeline__panel {
  padding: 16px 18px;
  background: var(--ink-700);
  border: 1px solid var(--hair);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .about-timeline__item:hover .about-timeline__panel,
.page-about .about-timeline__item:focus-within .about-timeline__panel {
  border-color: var(--hair-cyan);
  transform: translateX(3px);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--cream);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(245, 240, 230, 0.72);
}

/* ---------- 合作与资质 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 26px;
}

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

.page-about .about-badges {
  display: grid;
  gap: 1px;
  align-content: start;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .about-badges__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  background: var(--ink-700);
}

.page-about .about-badges__num {
  min-width: 72px;
  font-family: var(--font-mono);
  font-size: 23px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-badges__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--cream);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: 48px 0 60px;
  background: linear-gradient(158deg, var(--ink-900) 0%, var(--grad-start) 100%);
  border-top: 1px solid var(--hair-cyan);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 18px;
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(23px, 4.8vw, 40px);
  line-height: 1.2;
  color: var(--cream);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 64ch;
  font-size: 14.5px;
  line-height: 1.9;
  color: rgba(245, 240, 230, 0.78);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-about .about-cta__actions .btn {
  max-width: 100%;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

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

@media (min-width: 880px) {
  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 38px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 56px 0 66px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: clamp(32px, 5vw, 68px);
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about {
    --about-gap: 52px;
  }

  .page-about .about-layout {
    display: grid;
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
    padding-top: 72px;
    padding-bottom: 76px;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    margin-bottom: 0;
  }

  .page-about .about-index__list {
    display: block;
  }

  .page-about .about-index__link {
    display: flex;
    padding: 10px 0 10px 12px;
    font-size: 13px;
    border: 0;
    border-left: 2px solid rgba(126, 156, 146, 0.22);
    background: none;
    transition: color 0.2s ease, border-color 0.2s ease, padding-left 0.2s ease;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    padding-left: 18px;
    color: var(--cyan);
    border-left-color: var(--cyan);
    background: none;
  }

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

  .page-about .about-timeline {
    padding-left: 32px;
  }

  .page-about .about-timeline__dot {
    left: -32px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__title {
    max-width: 16ch;
  }
}
<<<END>>>