.page-about {
  --about-narrow: 46rem;
  --about-gap: clamp(52px, 7vw, 96px);
  --about-card-pad: clamp(20px, 3vw, 32px);
  position: relative;
  display: block;
  overflow: hidden;
}

.page-about::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: min(760px, 92vh);
  background:
    radial-gradient(760px 420px at 84% -6%, rgba(139, 92, 246, .22), transparent 68%),
    radial-gradient(620px 380px at 4% 14%, rgba(34, 224, 255, .11), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(36px, 7vw, 88px) 0 clamp(26px, 4vw, 48px);
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .about-hero__col {
  max-width: var(--about-narrow);
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.page-about .about-hero__eyebrow::before {
  content: "";
  display: block;
  width: 24px;
  height: 1px;
  background: var(--pink);
}

.page-about .about-hero h1 {
  margin: 0 0 clamp(18px, 2.6vw, 28px);
  font-size: clamp(32px, 6.2vw, 64px);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-hero__lead {
  margin: 0 0 clamp(24px, 3.4vw, 36px);
  max-width: 42rem;
  font-size: clamp(15.5px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
}

.page-about .about-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--ink-2);
}

.page-about .about-hero__facts b {
  font-family: var(--mono);
  font-size: 21px;
  font-weight: 600;
  color: var(--ink);
}

/* ---------- 全宽分隔图 ---------- */
.page-about .about-veil {
  margin: 0;
  padding: clamp(8px, 2vw, 20px) 0 clamp(28px, 4vw, 44px);
}

.page-about .about-veil__frame {
  position: relative;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-veil__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(7, 11, 30, .5), rgba(7, 11, 30, .88)),
    repeating-linear-gradient(180deg, rgba(34, 224, 255, .05) 0 1px, transparent 1px 5px);
  pointer-events: none;
}

.page-about .about-veil__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1600 / 760;
  object-fit: cover;
}

.page-about .about-veil__caption {
  max-width: 1440px;
  margin: 16px auto 0;
  padding: 0 var(--pad);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-2);
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  padding-top: var(--about-gap);
}

.page-about .about-section--honor {
  padding-bottom: var(--about-gap);
}

.page-about .about-section__head {
  max-width: 54rem;
  margin-bottom: clamp(26px, 3.6vw, 44px);
}

.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.page-about .about-eyebrow::before {
  content: "";
  display: block;
  width: 4px;
  height: 14px;
  border-radius: 2px;
  background: var(--purple);
}

.page-about .about-section__title {
  margin: 14px 0 0;
  font-size: clamp(24px, 3.6vw, 38px);
  font-weight: 600;
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-section__lead {
  margin: 14px 0 0;
  max-width: 46rem;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl-banner {
  margin-bottom: clamp(28px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.page-about .about-tl-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 640;
  object-fit: cover;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, rgba(34, 224, 255, .9), rgba(139, 92, 246, .65) 58%, rgba(139, 92, 246, 0));
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(24px, 3.4vw, 42px);
}

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

.page-about .about-timeline__dot {
  position: absolute;
  left: -26px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 224, 255, .13);
  transition: transform .24s var(--ease), background .24s var(--ease), box-shadow .24s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__dot,
.page-about .about-timeline__item:focus-within .about-timeline__dot {
  transform: scale(1.5);
  background: var(--pink);
  box-shadow: 0 0 0 8px rgba(255, 61, 139, .16);
}

.page-about .about-timeline__year {
  display: block;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .about-timeline__title {
  margin: 8px 0 0;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 8px 0 0;
  max-width: 40rem;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- 错层双卡 ---------- */
.page-about .about-stagger {
  display: grid;
  gap: clamp(18px, 3vw, 30px);
}

.page-about .about-card {
  position: relative;
  padding: var(--about-card-pad);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(14, 21, 51, .94), rgba(11, 18, 48, .94));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.page-about .about-card--net {
  border-color: rgba(139, 92, 246, .34);
}

.page-about .about-card__media {
  margin: calc(var(--about-card-pad) * -1) calc(var(--about-card-pad) * -1) var(--about-card-pad);
  position: relative;
}

.page-about .about-card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 11, 30, .12), rgba(11, 18, 48, .96));
  pointer-events: none;
}

.page-about .about-card__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 800;
  object-fit: cover;
}

.page-about .about-card__title {
  margin: 14px 0 0;
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 600;
  line-height: 1.34;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-card__text {
  margin: 12px 0 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--ink-2);
}

/* 比例条 */
.page-about .about-ratio {
  margin-top: clamp(20px, 3vw, 28px);
  display: grid;
  gap: 16px;
}

.page-about .about-ratio__meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-size: 13.5px;
  color: var(--ink);
}

.page-about .about-ratio__meta .mono {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--ink-2);
}

.page-about .about-ratio__bar {
  margin-top: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(29, 42, 87, .85);
  overflow: hidden;
}

.page-about .about-ratio__fill {
  display: block;
  height: 100%;
  width: var(--w, 50%);
  border-radius: inherit;
}

.page-about .about-ratio__fill--a {
  background: linear-gradient(90deg, var(--cyan), rgba(34, 224, 255, .55));
}

.page-about .about-ratio__fill--b {
  background: linear-gradient(90deg, var(--purple), rgba(139, 92, 246, .5));
}

.page-about .about-card.is-visible .about-ratio__fill {
  animation: about-bar-grow .9s var(--ease) both;
}

@keyframes about-bar-grow {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* 数据 */
.page-about .about-stats {
  margin-top: clamp(20px, 3vw, 28px);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 14px;
}

.page-about .about-stat {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(19, 28, 63, .5);
}

.page-about .about-stat__num {
  display: block;
  font-size: 28px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-stat__unit {
  display: inline-block;
  margin-left: 4px;
  font-size: 12px;
  color: var(--ink-2);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--ink-2);
}

/* 筛选 */
.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(20px, 3vw, 28px) 0 14px;
}

.page-about .about-chip {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(19, 28, 63, .62);
  color: var(--ink-2);
  font: inherit;
  font-size: 12.5px;
  letter-spacing: .04em;
  padding: 7px 15px;
  border-radius: 999px;
  cursor: pointer;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .about-chip:hover {
  color: var(--ink);
  border-color: var(--purple);
}

.page-about .about-chip.is-active {
  color: var(--ink);
  border-color: var(--cyan);
  background: rgba(34, 224, 255, .12);
}

.page-about .about-partners {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-partner {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--purple);
  border-radius: 10px;
  background: rgba(11, 18, 48, .6);
}

.page-about .about-partner__tag {
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--purple);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ink-2);
}

/* ---------- 四大栏目 ---------- */
.page-about .about-boards {
  display: grid;
  gap: 14px;
}

.page-about .about-board {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(19, 28, 63, .72), rgba(11, 18, 48, .9));
  transition: border-color .24s var(--ease), transform .24s var(--ease);
}

.page-about .about-board:hover {
  border-color: rgba(34, 224, 255, .45);
  transform: translateY(-4px);
}

.page-about .about-board__idx {
  display: block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--purple);
}

.page-about .about-board__title {
  margin: 12px 0 0;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
}

.page-about .about-board__title a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-board__title a:hover,
.page-about .about-board__title a:focus-visible {
  color: var(--cyan);
  border-color: currentColor;
}

.page-about .about-board__text {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--ink-2);
}

/* ---------- 荣誉 ---------- */
.page-about .about-honors {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(22px, 3vw, 38px);
}

.page-about .about-honor {
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.page-about .about-honor__fig {
  display: block;
  font-size: clamp(40px, 6.6vw, 68px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.03em;
}

.page-about .about-honor__fig--cyan { color: var(--cyan); }
.page-about .about-honor__fig--purple { color: var(--purple); }
.page-about .about-honor__fig--pink { color: var(--pink); }

.page-about .about-honor__title {
  margin: 16px 0 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-honor__text {
  margin: 8px 0 0;
  max-width: 34rem;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-2);
}

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

@media (min-width: 900px) {
  .page-about .about-stagger {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .page-about .about-card--net {
    margin-top: clamp(32px, 4.6vw, 60px);
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 8.5rem 1fr;
    column-gap: 20px;
    align-items: start;
  }

  .page-about .about-timeline__year {
    padding-top: 2px;
  }

  .page-about .about-timeline__title,
  .page-about .about-timeline__text {
    grid-column: 2;
  }

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

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

@media (min-width: 1100px) {
  .page-about .about-boards {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-card.is-visible .about-ratio__fill {
    animation: none;
  }

  .page-about .about-board,
  .page-about .about-timeline__dot {
    transition: none;
  }

  .page-about .about-board:hover {
    transform: none;
  }
}

.page-about {
  --w: 1rem;
}