.page-about {
  --about-band: rgba(18, 59, 74, .72);
  --about-gap: clamp(18px, 3.6vw, 40px);
}

.page-about .about-hero {
  position: relative;
  z-index: 0;
  padding: clamp(26px, 5vw, 56px) 0 clamp(30px, 5.5vw, 56px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 78%;
  z-index: -1;
  background:
    linear-gradient(135deg, rgba(31, 224, 200, .15) 0%, rgba(31, 224, 200, 0) 54%),
    linear-gradient(305deg, rgba(255, 159, 69, .16) 0%, rgba(255, 159, 69, 0) 48%),
    var(--ml-stand);
  clip-path: polygon(0 0, 100% 0, 100% 74%, 0 100%);
}

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

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: end;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  max-width: 22ch;
}

.page-about .about-hero__lede {
  margin-top: 18px;
  max-width: 58ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__aside {
  border: 1px solid var(--ml-line);
  border-radius: var(--ml-r);
  background: var(--ml-sheet);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 18px 20px 10px;
}

.page-about .about-hero__aside-title {
  margin: 0 0 6px;
  font-size: .7rem;
  letter-spacing: .24em;
  color: var(--ml-mist);
}

.page-about .about-aside-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--ml-line-soft);
}

.page-about .about-aside-item:last-child {
  border-bottom: 0;
}

.page-about .about-aside-item__key {
  font-size: .76rem;
  letter-spacing: .14em;
  color: var(--ml-mist);
}

.page-about .about-aside-item__val {
  font-family: var(--ml-mono);
  font-size: .95rem;
  font-variant-numeric: tabular-nums;
  color: var(--ml-snow);
}

/* ---------- 通用分栏 ---------- */

.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-split__body p + p {
  margin-top: 16px;
}

.page-about .about-note {
  border-left: 2px solid var(--ml-orange);
  padding: 2px 0 2px 18px;
}

/* ---------- 团队 ---------- */

.page-about .about-figure {
  margin: 0 0 clamp(22px, 3.4vw, 34px);
}

.page-about .about-figure .ml-media {
  aspect-ratio: 800 / 520;
}

.page-about .ml-media {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--ml-r);
  border: 1px solid var(--ml-line);
  background: var(--ml-teal);
}

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

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-team-card {
  position: relative;
  overflow: hidden;
  padding: 24px 20px 20px;
  border-radius: var(--ml-r);
  border: 1px solid var(--ml-line);
  background: var(--ml-sheet);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform .28s var(--ml-ease), border-color .28s var(--ml-ease);
}

.page-about .about-team-card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--ml-cyan), rgba(31, 224, 200, 0));
}

.page-about .about-team-card--green::before {
  background: linear-gradient(90deg, var(--ml-green), rgba(75, 245, 141, 0));
}

.page-about .about-team-card--orange::before {
  background: linear-gradient(90deg, var(--ml-orange), rgba(255, 159, 69, 0));
}

.page-about .about-team-card--clock::before {
  background: linear-gradient(90deg, var(--ml-glass), rgba(143, 182, 217, 0));
}

.page-about .about-team-card__num {
  margin: 0;
  font-family: var(--ml-mono);
  font-size: clamp(1.9rem, 5vw, 2.4rem);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--ml-cyan);
}

.page-about .about-team-card--green .about-team-card__num {
  color: var(--ml-green);
}

.page-about .about-team-card--orange .about-team-card__num {
  color: var(--ml-orange);
}

.page-about .about-team-card--clock .about-team-card__num {
  color: var(--ml-glass);
}

.page-about .about-team-card__role {
  margin: 12px 0 8px;
}

.page-about .about-team-card__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--ml-text);
}

/* ---------- 数据来源 ---------- */

.page-about .about-source-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-source-grid__text p + p {
  margin-top: 16px;
}

.page-about .about-source-figure {
  margin: 0;
}

.page-about .about-source-figure .ml-media {
  aspect-ratio: 900 / 520;
}

.page-about .about-source-list {
  margin-top: clamp(24px, 3.6vw, 40px);
  border-top: 1px solid var(--ml-line);
}

.page-about .about-source-row {
  padding: 18px 0;
  border-bottom: 1px solid var(--ml-line-soft);
}

.page-about .about-source-row__key {
  margin: 0 0 6px;
  font-family: var(--ml-narrow);
  font-size: 1rem;
  color: var(--ml-snow);
}

.page-about .about-source-row__key .ml-num {
  display: inline-block;
  min-width: 1.6em;
  margin-right: 8px;
  color: var(--ml-cyan);
  font-size: .82rem;
}

.page-about .about-source-row__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--ml-text);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-timeline {
  position: relative;
  padding-left: 34px;
  display: grid;
  gap: 14px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--ml-cyan) 0%, rgba(31, 224, 200, .08) 100%);
}

.page-about .about-node {
  position: relative;
  padding: 16px 18px;
  border-radius: var(--ml-r);
  border: 1px solid var(--ml-line);
  background: var(--about-band);
  transition: border-color .28s var(--ml-ease);
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 22px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ml-night);
  border: 2px solid var(--ml-cyan);
}

.page-about .about-node--current {
  border-color: rgba(255, 159, 69, .5);
  background: rgba(18, 59, 74, .94);
}

.page-about .about-node--current::before {
  border-color: var(--ml-orange);
  background: var(--ml-orange);
}

.page-about .about-node__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  list-style: none;
  cursor: pointer;
}

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

.page-about .about-node__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--ml-mono);
  font-size: 1rem;
  color: var(--ml-mist);
}

.page-about .about-node[open] .about-node__head::after {
  content: "\2013";
  color: var(--ml-cyan);
}

.page-about .about-node__no {
  font-size: .82rem;
  letter-spacing: .08em;
  color: var(--ml-cyan);
}

.page-about .about-node--current .about-node__no {
  color: var(--ml-orange);
}

.page-about .about-node__title {
  font-family: var(--ml-narrow);
  font-size: 1.02rem;
  letter-spacing: .01em;
  color: var(--ml-snow);
}

.page-about .about-node__body {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--ml-line-soft);
}

.page-about .about-node__body p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: var(--ml-text);
}

.page-about .about-timeline-figure {
  margin: 0;
}

.page-about .about-timeline-figure .ml-media {
  aspect-ratio: 720 / 900;
}

/* ---------- 合作与认可 ---------- */

.page-about .about-kpi {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-kpi__item {
  padding: 22px 20px;
  border-radius: var(--ml-r);
  border: 1px solid var(--ml-line);
  background: var(--ml-sheet);
}

.page-about .about-kpi__item--warm {
  border-color: rgba(255, 159, 69, .42);
}

.page-about .about-kpi__value {
  margin: 0 0 8px;
  font-size: clamp(1.3rem, 3.4vw, 1.7rem);
  line-height: 1.1;
  color: var(--ml-cyan);
}

.page-about .about-kpi__item--warm .about-kpi__value {
  color: var(--ml-orange);
}

.page-about .about-kpi__label {
  margin: 0;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--ml-text);
}

.page-about .about-closing {
  margin-top: clamp(26px, 4vw, 42px);
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--ml-line);
  max-width: 70ch;
}

.page-about .about-closing__text + .about-closing__text {
  margin-top: 14px;
}

.page-about .about-closing a {
  color: var(--ml-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 224, 200, .38);
  transition: border-color .24s var(--ml-ease), color .24s var(--ml-ease);
}

.page-about .about-closing a:hover {
  color: var(--ml-snow);
  border-bottom-color: var(--ml-orange);
}

/* ---------- 桌面 ---------- */

@media (min-width: 760px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-source-row {
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .about-source-row__key {
    margin-bottom: 0;
  }
}

@media (min-width: 940px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(250px, .85fr);
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.7fr) minmax(250px, .8fr);
  }

  .page-about .about-source-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }

  .page-about .about-timeline-wrap {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr);
  }
}

@media (min-width: 1080px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-team-card:hover {
    transform: translateY(-3px);
    border-color: rgba(143, 182, 217, .46);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team-card,
  .page-about .about-node {
    transition: none;
  }

  .page-about .about-team-card:hover {
    transform: none;
  }
}
</main>