.page-about {
  background: var(--ink);
  color: var(--frost);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  padding: clamp(22px, 4vw, 42px) 0 clamp(48px, 8vw, 96px);
}

.page-about .about-intro__grid {
  display: grid;
  gap: clamp(30px, 5vw, 60px);
  margin-top: clamp(22px, 4vw, 44px);
  align-items: start;
}

@media (min-width: 900px) {
  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 1fr);
    align-items: end;
  }
}

.page-about .about-intro__lede h1 {
  margin: 14px 0 0;
  font-size: clamp(28px, 5.2vw, 52px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--frost);
}

.page-about .about-intro__lede .lead {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.82;
  color: #C4D0E4;
  max-width: 62ch;
}

.page-about .about-intro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-intro__stats {
  border-top: 2px solid var(--cyan);
}

.page-about .stat {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 13px 0;
  border-bottom: var(--line);
}

.page-about .stat__num {
  font-family: var(--cond);
  font-size: clamp(28px, 3.6vw, 38px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -.02em;
}

.page-about .stat__label {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
  text-align: right;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  padding: clamp(48px, 8vw, 96px) 0;
  background: var(--ink-2);
}

.page-about .about-timeline__head {
  margin-bottom: clamp(28px, 4vw, 46px);
}

.page-about .about-timeline__head .lead {
  margin-top: 14px;
  max-width: 58ch;
  color: #C4D0E4;
  line-height: 1.82;
}

.page-about .about-timeline__media {
  margin: 0 0 clamp(36px, 6vw, 64px);
}

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

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--frost) 0%, #7ADDD8 48%, var(--cyan) 100%);
}

.page-about .tl-node {
  position: relative;
  padding: 0 0 34px 34px;
}

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

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  width: 13px;
  height: 13px;
  box-sizing: border-box;
  border: 2px solid var(--ink-2);
  background: var(--dot-color, var(--frost));
  box-shadow: 0 0 0 1px var(--hair);
}

.page-about .tl-node:nth-child(1) { --dot-color: #E8EEF7; }
.page-about .tl-node:nth-child(2) { --dot-color: #BDD4E8; }
.page-about .tl-node:nth-child(3) { --dot-color: #8FE0DC; }
.page-about .tl-node:nth-child(4) { --dot-color: #5FE2D8; }
.page-about .tl-node:nth-child(5) { --dot-color: #3AE2D6; }
.page-about .tl-node:nth-child(6) { --dot-color: #22E3D3; }

.page-about .tl-node__year {
  display: block;
  font-family: var(--cond);
  font-size: clamp(34px, 8vw, 46px);
  line-height: .95;
  letter-spacing: -.01em;
  color: var(--frost);
  margin-bottom: 8px;
}

.page-about .tl-node__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.2vw, 20px);
  font-weight: 800;
  color: var(--frost);
}

.page-about .tl-node__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: #B8C6DE;
  max-width: 46ch;
}

.page-about .tl-node__extra {
  margin: 10px 0 0;
  max-height: 70px;
  opacity: 1;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  transition: max-height .24s var(--ease), opacity .24s var(--ease);
}

.page-about .tl-node__extra b {
  color: var(--cyan);
  font-weight: 700;
}

@media (hover: hover) and (min-width: 860px) {
  .page-about .tl-node__extra {
    max-height: 0;
    opacity: 0;
  }
  .page-about .tl-node:hover .tl-node__extra {
    max-height: 70px;
    opacity: 1;
  }
}

@media (min-width: 860px) {
  .page-about .about-timeline__list::before {
    left: 50%;
    top: 12px;
    bottom: 12px;
    transform: translateX(-50%);
  }

  .page-about .tl-node {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: clamp(44px, 8vw, 112px);
    padding: 0 0 56px 0;
  }

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

  .page-about .tl-node::before {
    left: 50%;
    top: 12px;
    width: 14px;
    height: 14px;
    transform: translateX(-50%);
  }

  .page-about .tl-node__year {
    text-align: right;
    margin-bottom: 0;
    font-size: clamp(52px, 6.4vw, 78px);
    line-height: .88;
  }

  .page-about .tl-node__text {
    max-width: 44ch;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(48px, 8vw, 96px) 0;
}

.page-about .about-team .section__head .lead {
  margin-top: 14px;
  max-width: 56ch;
  color: #C4D0E4;
  line-height: 1.82;
}

.page-about .about-team__cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 34px);
  margin-top: clamp(28px, 4vw, 46px);
}

@media (min-width: 900px) {
  .page-about .about-team__cols {
    grid-template-columns: 0.86fr 1.2fr 0.94fr;
    gap: clamp(26px, 3.4vw, 56px);
    align-items: start;
  }
}

.page-about .tm-col {
  padding-top: 18px;
  border-top: 3px solid var(--hair);
}

.page-about .tm-col--entry { border-top-color: var(--cyan); }
.page-about .tm-col--judge { border-top-color: var(--amber); }
.page-about .tm-col--viz { border-top-color: var(--violet); }

.page-about .tm-col__index {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-about .tm-col__title {
  margin: 10px 0 0;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 800;
  color: var(--frost);
}

.page-about .tm-col__role {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: #B8C6DE;
}

.page-about .tm-col__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .tm-col__list li {
  position: relative;
  padding-left: 15px;
  margin-bottom: 9px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .tm-col__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 5px;
  height: 5px;
  background: currentColor;
  opacity: .75;
}

.page-about .tm-col__stat {
  margin: 22px 0 0;
  font-family: var(--cond);
  font-size: 32px;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--frost);
}

.page-about .tm-col--entry .tm-col__stat { color: var(--cyan); }
.page-about .tm-col--judge .tm-col__stat { color: var(--amber); }
.page-about .tm-col--viz .tm-col__stat { color: var(--violet); }

.page-about .tm-col__stat span {
  display: block;
  margin-top: 7px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0;
  color: var(--muted);
}

.page-about .about-team__media {
  margin: clamp(32px, 5vw, 58px) 0 0;
}

/* ---------- 校验 ---------- */
.page-about .about-check {
  padding: clamp(48px, 8vw, 96px) 0;
  background: var(--ink-2);
}

.page-about .about-check .section__head .lead {
  margin-top: 14px;
  max-width: 58ch;
  color: #C4D0E4;
  line-height: 1.82;
}

.page-about .about-check__list {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 34px);
}

@media (min-width: 880px) {
  .page-about .about-check__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(44px, 5vw, 72px);
  }
}

.page-about .ck-step {
  position: relative;
}

@media (min-width: 880px) {
  .page-about .ck-step + .ck-step::before {
    content: "";
    position: absolute;
    left: -36px;
    top: 25px;
    width: 22px;
    height: 2px;
    background: var(--violet);
    opacity: .8;
  }

  .page-about .ck-step + .ck-step::after {
    content: "";
    position: absolute;
    left: -16px;
    top: 21px;
    border-left: 6px solid var(--violet);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
  }
}

.page-about .ck-step__details {
  border-top: 2px solid var(--hair);
}

.page-about .ck-step__details[open] {
  border-top-color: var(--cyan);
}

.page-about .ck-step__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .ck-step__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 16px;
  line-height: 1;
  color: var(--muted);
}

.page-about .ck-step__details[open] .ck-step__head::after {
  content: "–";
  color: var(--cyan);
}

.page-about .ck-step__no {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--violet);
}

.page-about .ck-step__title {
  font-size: 17px;
  font-weight: 800;
  color: var(--frost);
}

.page-about .ck-step__body {
  padding: 0 0 22px;
}

.page-about .ck-step__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: #B8C6DE;
}

.page-about .ck-step__eta {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--violet);
}

.page-about .about-check__media {
  margin: clamp(36px, 5vw, 58px) 0 0;
}

/* ---------- 数据来源 ---------- */
.page-about .about-supply {
  padding: clamp(48px, 8vw, 96px) 0;
}

.page-about .about-supply__split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4vw, 56px);
  margin-top: clamp(24px, 4vw, 42px);
}

@media (min-width: 880px) {
  .page-about .about-supply__split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: clamp(40px, 6vw, 88px);
  }
}

.page-about .about-supply__text p {
  margin: 0 0 18px;
  font-size: 15.5px;
  line-height: 1.86;
  color: #B8C6DE;
}

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

.page-about .about-supply__text a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-supply__text a:hover {
  color: var(--frost);
}

.page-about .about-supply__facts {
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--hair);
}

.page-about .about-supply__facts > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding: 14px 0;
  border-bottom: var(--line);
}

.page-about .about-supply__facts dt {
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-supply__facts dd {
  margin: 0;
  flex: 0 0 auto;
  font-family: var(--cond);
  font-size: 26px;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--cyan);
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience {
  padding: clamp(48px, 8vw, 96px) 0;
  background: var(--ink-2);
}

.page-about .about-audience .section__head .lead {
  margin-top: 14px;
  max-width: 56ch;
  color: #C4D0E4;
  line-height: 1.82;
}

.page-about .about-audience__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--hair);
  margin-top: clamp(28px, 4vw, 46px);
}

@media (min-width: 720px) {
  .page-about .about-audience__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .about-audience__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .au-card {
  background: var(--ink-2);
  padding: clamp(22px, 3vw, 30px);
}

.page-about .au-card__label {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .au-card__title {
  margin: 12px 0 0;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--frost);
}

.page-about .au-card__text {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: #B8C6DE;
}

/* ---------- 收束 ---------- */
.page-about .about-close {
  padding: clamp(64px, 12vw, 150px) 0 clamp(80px, 14vw, 180px);
}

.page-about .about-close__inner {
  max-width: 760px;
}

.page-about .about-close h2 {
  margin: 16px 0 0;
  font-size: clamp(24px, 3.6vw, 40px);
  font-weight: 900;
  line-height: 1.22;
  color: var(--frost);
}

.page-about .about-close p {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.82;
  color: #B8C6DE;
  max-width: 58ch;
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ---------- 图片通用 ---------- */
.page-about .media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.72) contrast(1.06) brightness(.92) hue-rotate(-6deg);
}

.page-about .media__caption {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-node__extra {
    transition: none;
  }
}
<<<END>>>