.page-about {
  --about-rail-offset: 27px;
  --about-node-pad: 56px;
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.78;
}

.page-about .about-hero,
.page-about .about-block,
.page-about .about-legal {
  padding: 56px 0;
}

.page-about .about-block--timeline {
  padding-top: 24px;
}

.page-about .about-block__head {
  max-width: 720px;
  margin-bottom: 40px;
}

.page-about .about-block__title {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(1.55rem, 4.6vw, 2.4rem);
  line-height: 1.2;
  letter-spacing: -0.005em;
  margin: 8px 0 14px;
  color: var(--text);
  text-wrap: balance;
}

.page-about .about-block__intro {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  max-width: 62ch;
}

.page-about .display {
  font-family: var(--font-head);
  font-weight: 200;
  font-size: clamp(2rem, 8vw, 3.75rem);
  line-height: 1.06;
  letter-spacing: -0.012em;
  margin: 10px 0 20px;
  color: var(--text);
  text-wrap: balance;
}

.page-about .display strong {
  color: var(--cyan);
  font-weight: 700;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0;
}

.page-about .section-label {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .18em;
  color: var(--muted);
  margin: 0;
  text-transform: uppercase;
}

.page-about .section-label::before {
  content: "";
  display: inline-block;
  width: 26px;
  height: 1px;
  background: var(--cyan);
  vertical-align: middle;
  margin-right: 12px;
}

/* ---------- Hero ---------- */

.page-about .about-hero {
  position: relative;
  padding-top: 28px;
  padding-bottom: 64px;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
  margin-top: 22px;
}

.page-about .about-hero__lead {
  font-size: 1.02rem;
  color: var(--text);
  opacity: .86;
  margin: 0 0 28px;
  max-width: 60ch;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 20px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .data-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--data);
  font-weight: 600;
  letter-spacing: .01em;
}

.page-about .about-hero__facts .data-num {
  font-size: 1.85rem;
  line-height: 1;
}

.page-about .about-hero__fact-label {
  font-size: .82rem;
  color: var(--muted);
}

.page-about .about-hero__cta {
  gap: 12px;
}

.page-about .about-hero__media {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(135deg, var(--grass-a), var(--grass-b));
  margin: 0;
}

.page-about .about-hero__media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(11, 18, 48, .32) 0 1px, transparent 1px 44px),
    repeating-linear-gradient(0deg, rgba(11, 18, 48, .32) 0 1px, transparent 1px 44px);
  opacity: .45;
  pointer-events: none;
  z-index: 1;
}

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

.page-about .about-hero__media .media__img {
  aspect-ratio: 16 / 9;
  position: relative;
  z-index: 0;
}

.page-about .media__caption {
  position: relative;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--ink);
  background: var(--cyan);
  padding: 8px 14px;
  display: inline-block;
  margin: 0;
}

/* ---------- 时间轴技能树 ---------- */

.page-about .tl {
  position: relative;
  padding-left: var(--about-node-pad);
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: var(--about-rail-offset);
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--grass-b) 55%, var(--orange) 100%);
  opacity: .42;
}

.page-about .tl__node {
  position: relative;
  padding-bottom: 18px;
}

.page-about .tl__dot {
  position: absolute;
  left: calc(-1 * (var(--about-node-pad) - var(--about-rail-offset) + 7px));
  top: 24px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(43, 240, 214, .12);
  z-index: 2;
}

.page-about .tl__trigger {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "idx era chev"
    "idx title chev";
  column-gap: 14px;
  row-gap: 2px;
  align-items: center;
  width: 100%;
  padding: 18px 20px;
  text-align: left;
  font: inherit;
  color: inherit;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--r);
  cursor: pointer;
  position: relative;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}

.page-about .tl__trigger:hover {
  border-color: var(--line-strong);
  background: #1a2555;
}

.page-about .tl__trigger[aria-expanded="true"] {
  border-color: var(--line-strong);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

.page-about .tl__idx {
  grid-area: idx;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: .04em;
  align-self: start;
  margin-top: 2px;
}

.page-about .tl__era {
  grid-area: era;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .tl__title {
  grid-area: title;
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 1.12rem;
  line-height: 1.3;
  color: var(--text);
}

.page-about .tl__chev {
  grid-area: chev;
  width: 12px;
  height: 12px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform .3s var(--ease);
  align-self: center;
  margin-top: -4px;
}

.page-about .tl__trigger[aria-expanded="true"] .tl__chev {
  transform: rotate(-135deg);
  margin-top: 4px;
}

.page-about .tl__panel {
  overflow: hidden;
  border: 1px solid transparent;
  border-top: none;
  border-radius: 0 0 var(--r) var(--r);
  transition: max-height .42s var(--ease), opacity .3s var(--ease);
}

.page-about .tl__trigger[aria-expanded="true"] + .tl__panel {
  border-color: var(--line);
  background: rgba(22, 32, 74, .62);
}

.js .page-about .tl__panel {
  max-height: 0;
  opacity: 0;
}

.js .page-about .tl__trigger[aria-expanded="true"] + .tl__panel {
  max-height: 900px;
  opacity: 1;
}

.page-about .tl__inner {
  padding: 18px 22px 22px;
}

.page-about .tl__inner p {
  margin: 0 0 14px;
  font-size: .96rem;
  color: var(--text);
  opacity: .88;
}

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

.page-about .tl__outcome {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--data) !important;
  opacity: 1 !important;
}

.page-about .tl__outcome span {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(255, 209, 102, .13);
  color: var(--data);
  font-size: .7rem;
  letter-spacing: .08em;
}

.page-about .tl__outcome a.link {
  color: var(--cyan);
}

/* ---------- 流程区块 ---------- */

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

.page-about .about-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-steps__item {
  position: relative;
  padding: 20px 22px 20px 22px;
  border-radius: var(--r);
  background: var(--ink-2);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-steps__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), var(--grass-b));
  opacity: .7;
}

.page-about .about-steps__n {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-about .about-steps__title {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 1.08rem;
  margin: 4px 0 8px;
  color: var(--text);
}

.page-about .about-steps__item p {
  margin: 0;
  font-size: .93rem;
  color: var(--muted);
}

.page-about .about-process__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, var(--grass-a), var(--grass-b));
}

.page-about .about-process__media .media__img {
  aspect-ratio: 3 / 2;
}

/* ---------- 每周五 ---------- */

.page-about .about-block--friday {
  position: relative;
}

.page-about .about-friday {
  display: grid;
  gap: 24px;
}

.page-about .about-friday__mark {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 26px 24px;
  border-radius: var(--r-lg);
  background: linear-gradient(140deg, var(--grass-a) 0%, var(--grass-b) 100%);
  color: var(--ink);
  align-self: start;
}

.page-about .about-friday__time {
  font-size: clamp(2.4rem, 9vw, 3.4rem);
  line-height: 1;
  color: var(--ink) !important;
  font-weight: 700;
}

.page-about .about-friday__day {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: .04em;
}

.page-about .about-friday__note {
  font-size: .82rem;
  color: rgba(11, 18, 48, .72);
  margin-top: 6px;
}

.page-about .about-friday__flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-friday__step {
  position: relative;
  padding: 18px 20px 18px 62px;
  border-radius: var(--r);
  border: 1px solid var(--line);
  background: rgba(22, 32, 74, .5);
}

.page-about .about-friday__step-n {
  position: absolute;
  left: 18px;
  top: 18px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: rgba(43, 240, 214, .12);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: .86rem;
  font-weight: 700;
}

.page-about .about-friday__step h3 {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 1.02rem;
  margin: 0 0 6px;
  color: var(--text);
}

.page-about .about-friday__step p {
  margin: 0;
  font-size: .92rem;
  color: var(--muted);
}

.page-about .about-friday__link {
  margin: 26px 0 0;
  font-size: .95rem;
  color: var(--muted);
}

/* ---------- 团队 ---------- */

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

.page-about .about-team__aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-team__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(135deg, var(--grass-a), var(--grass-b));
}

.page-about .about-team__media .media__img {
  aspect-ratio: 4 / 3;
}

.page-about .team {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .team__item {
  border-radius: var(--r);
  overflow: hidden;
}

.page-about .team__head {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  column-gap: 14px;
  width: 100%;
  padding: 18px 20px;
  text-align: left;
  font: inherit;
  color: inherit;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--r);
  cursor: pointer;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}

.page-about .team__head:hover {
  border-color: var(--line-strong);
  background: #1a2555;
}

.page-about .team__head[aria-expanded="true"] {
  border-color: var(--line-strong);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

.page-about .team__no {
  font-family: var(--font-mono);
  font-size: .84rem;
  color: var(--cyan);
  letter-spacing: .06em;
}

.page-about .team__name {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 1.08rem;
  color: var(--text);
}

.page-about .team__count {
  font-size: .86rem;
}

.page-about .team__chev {
  width: 11px;
  height: 11px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform .3s var(--ease);
  margin-top: -4px;
}

.page-about .team__head[aria-expanded="true"] .team__chev {
  transform: rotate(-135deg);
  margin-top: 4px;
}

.page-about .team__panel {
  overflow: hidden;
  border: 1px solid transparent;
  border-top: none;
  border-radius: 0 0 var(--r) var(--r);
  transition: max-height .42s var(--ease), opacity .3s var(--ease);
}

.page-about .team__head[aria-expanded="true"] + .team__panel {
  border-color: var(--line);
  background: rgba(22, 32, 74, .55);
}

.js .page-about .team__panel {
  max-height: 0;
  opacity: 0;
}

.js .page-about .team__head[aria-expanded="true"] + .team__panel {
  max-height: 480px;
  opacity: 1;
}

.page-about .team__inner {
  padding: 18px 22px 22px;
}

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

.page-about .team__list li {
  position: relative;
  padding-left: 18px;
  font-size: .93rem;
  color: var(--text);
  opacity: .86;
}

.page-about .team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--orange);
  opacity: .85;
}

/* ---------- 合作伙伴 ---------- */

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

.page-about .partners__card {
  position: relative;
  padding: 26px 22px 24px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .partners__card.card--tint {
  background:
    linear-gradient(150deg, rgba(15, 122, 75, .55) 0%, rgba(53, 196, 106, .22) 60%, rgba(22, 32, 74, .95) 100%),
    var(--ink-2);
}

.page-about .partners__no {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--muted);
  margin: 0;
}

.page-about .partners__title {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 1.14rem;
  margin: 6px 0 10px;
  color: var(--text);
}

.page-about .partners__num {
  font-size: 2.1rem;
  line-height: 1;
  margin: 0;
}

.page-about .partners__cap {
  font-size: .8rem;
  color: var(--muted);
  margin: 2px 0 12px;
}

.page-about .partners__text {
  margin: 0;
  font-size: .93rem;
  color: var(--text);
  opacity: .84;
}

.page-about .about-partners__cta {
  margin-top: 28px;
  gap: 12px;
}

/* ---------- 底部信息带 ---------- */

.page-about .about-legal {
  border-top: 1px solid var(--line);
  background: var(--cream);
  color: var(--ink);
  padding: 44px 0;
}

.page-about .about-legal__inner {
  display: grid;
  gap: 22px 30px;
}

.page-about .about-legal__label {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(11, 18, 48, .55);
  margin: 0 0 6px;
}

.page-about .about-legal__value {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.24rem;
  margin: 0;
  color: var(--ink);
  word-break: break-all;
}

.page-about .about-legal__value--mono {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.02rem;
}

.page-about .about-legal__sub {
  margin: 6px 0 0;
  font-size: .84rem;
  color: rgba(11, 18, 48, .62);
}

/* ---------- 媒体查询 ---------- */

@media (min-width: 720px) {
  .page-about .about-hero,
  .page-about .about-block,
  .page-about .about-legal {
    padding: 76px 0;
  }

  .page-about .about-block--timeline {
    padding-top: 30px;
  }

  .page-about {
    --about-node-pad: 80px;
    --about-rail-offset: 34px;
  }

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

  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-friday {
    grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .about-friday__flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-friday__step {
    padding: 60px 18px 18px;
  }

  .page-about .about-friday__step-n {
    top: 16px;
    left: 18px;
  }

  .page-about .partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-legal__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 40px;
  }

  .page-about .about-legal__col--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: 52px;
    align-items: end;
  }

  .page-about .about-process {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-process__media .media__img {
    aspect-ratio: 4 / 5;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-legal__col--wide {
    grid-column: auto;
  }

  .page-about .tl__trigger {
    padding: 22px 26px;
  }

  .page-about .tl__inner {
    padding: 22px 26px 26px;
  }

  .page-about .tl__title {
    font-size: 1.22rem;
  }
}

@media (min-width: 1200px) {
  .page-about {
    --about-node-pad: 104px;
    --about-rail-offset: 44px;
  }

  .page-about .tl__inner p {
    font-size: 1rem;
  }
}
<<<END>>>