.page-about {
  --about-rule: rgba(154, 168, 195, 0.24);
  --about-paper-line: #D9CBB2;
  background: var(--indigo);
  color: var(--paper-white);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .media-frame__img {
  display: block;
  width: 100%;
  object-fit: cover;
}

.page-about a:focus-visible {
  outline: 2px solid var(--ochre);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(32px, 6vw, 76px) clamp(44px, 8vw, 100px);
  background:
    radial-gradient(circle at 84% 8%, rgba(192, 138, 46, 0.2), transparent 48%),
    linear-gradient(180deg, var(--deep) 0%, var(--indigo) 62%, var(--indigo-2) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(154, 168, 195, 0.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(154, 168, 195, 0.09) 1px, transparent 1px);
  background-size: 96px 96px;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  border: 1px solid var(--rule-strong);
  padding: clamp(20px, 3.4vw, 48px);
  background: linear-gradient(180deg, rgba(27, 39, 69, 0.6), rgba(17, 26, 51, 0.1));
}

.page-about .about-hero__inner::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  width: 88px;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--crimson) 0 25%,
    var(--ochre) 25% 50%,
    var(--turquoise) 50% 75%,
    var(--mist) 75% 100%
  );
}

.page-about .about-hero__eyebrow {
  margin: clamp(18px, 3vw, 34px) 0 0;
  color: var(--ochre);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--paper-white);
}

.page-about .about-hero__accent {
  font-style: normal;
  color: var(--ochre);
}

.page-about .about-hero__lede {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(251, 246, 236, 0.86);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-hero__figures {
  list-style: none;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 14px;
}

.page-about .about-hero__fig-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: 0.06em;
  color: var(--ochre);
}

.page-about .about-hero__fig-label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--grey-blue);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin .eyebrow,
.page-about .about-timeline .eyebrow {
  color: var(--crimson);
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(20px, 3vw, 44px);
  align-items: start;
}

.page-about .about-origin__copy p {
  margin: 0 0 1em;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink);
}

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

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

.page-about .about-values {
  list-style: none;
  margin: clamp(28px, 4vw, 52px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-values__item {
  background: var(--paper-white);
  border: 1px solid var(--about-paper-line);
  border-top: 3px solid var(--turquoise);
  padding: 18px 18px 16px;
  box-shadow: 6px 6px 0 rgba(28, 27, 25, 0.06);
}

.page-about .about-values__item:nth-child(2) {
  border-top-color: var(--crimson);
}

.page-about .about-values__item:nth-child(3) {
  border-top-color: var(--ochre);
}

.page-about .about-values__item p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(28, 27, 25, 0.82);
}

/* ---------- 版本演进时间线 ---------- */
.page-about .about-timeline {
  padding-top: clamp(28px, 4vw, 52px);
}

.page-about .about-timeline__head {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  align-items: center;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-timeline__lede {
  margin-top: 12px;
}

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

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

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(
    180deg,
    var(--crimson) 0%,
    var(--ochre) 42%,
    var(--turquoise) 78%,
    var(--mist) 100%
  );
  opacity: 0.45;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 20px 34px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--paper-white);
  border: 2px solid var(--ochre);
  transition: background 200ms ease-out, box-shadow 200ms ease-out;
}

.page-about .about-timeline__item.is-revealed::before {
  background: var(--ochre);
  box-shadow: 0 0 0 5px rgba(192, 138, 46, 0.16);
}

.page-about .about-timeline__card {
  background: var(--paper-white);
  border: 1px solid var(--about-paper-line);
  padding: 16px 18px;
  box-shadow: 5px 5px 0 rgba(28, 27, 25, 0.05);
  transition: border-color 200ms ease-out, transform 200ms ease-out;
}

.page-about .about-timeline__card:hover {
  border-color: var(--ochre);
  transform: translateX(2px);
}

.page-about .about-timeline__meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 6px;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.08em;
  color: var(--ochre);
}

.page-about .about-timeline__ver {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--crimson);
  border: 1px solid currentColor;
  padding: 1px 6px;
}

.page-about .about-timeline__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-timeline__card p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(28, 27, 25, 0.78);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--indigo);
}

.page-about .about-team .eyebrow,
.page-about .about-flow .eyebrow,
.page-about .about-partners .eyebrow {
  color: var(--ochre);
}

.page-about .about-team .section-title,
.page-about .about-flow .section-title,
.page-about .about-partners .section-title {
  color: var(--paper-white);
}

.page-about .about-team__head {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  align-items: center;
}

.page-about .about-team__lede {
  margin-top: 12px;
  max-width: 56ch;
  color: var(--grey-blue);
}

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

.page-about .about-team__grid {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-role {
  position: relative;
  background: var(--indigo-2);
  border: 1px solid var(--about-rule);
  padding: 22px 18px 18px;
  transition: transform 200ms ease-out, border-color 200ms ease-out, background 200ms ease-out;
}

.page-about .about-role::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: var(--crimson);
  transform: scaleX(0.28);
  transform-origin: left;
  transition: transform 200ms ease-out;
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  transform: translateY(-3px);
  border-color: var(--ochre);
  background: #223052;
}

.page-about .about-role:hover::before,
.page-about .about-role:focus-within::before {
  transform: scaleX(1);
}

.page-about .about-role__count {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--paper-white);
  background: var(--turquoise);
  padding: 2px 8px;
}

.page-about .about-role:nth-child(1) .about-role__count {
  background: var(--crimson);
}

.page-about .about-role:nth-child(3) .about-role__count {
  background: var(--mist);
}

.page-about .about-role:nth-child(4) .about-role__count {
  background: var(--ochre);
  color: var(--ink);
}

.page-about .about-role__name {
  margin: 12px 0 6px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  color: var(--paper-white);
}

.page-about .about-role__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--grey-blue);
}

.page-about .about-role__duties {
  list-style: none;
  margin: 14px 0 0;
  padding: 12px 0 0;
  border-top: 1px dashed var(--about-rule);
  font-size: 13px;
  line-height: 1.6;
  color: rgba(251, 246, 236, 0.74);
}

.page-about .about-role__duties li {
  position: relative;
  padding-left: 12px;
  margin-bottom: 5px;
}

.page-about .about-role__duties li:last-child {
  margin-bottom: 0;
}

.page-about .about-role__duties li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 4px;
  height: 4px;
  background: var(--ochre);
}

/* ---------- 内容流程 ---------- */
.page-about .about-flow {
  background: var(--indigo-2);
}

.page-about .about-flow__list {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-flow__step {
  border-top: 2px solid var(--about-rule);
  padding-top: 14px;
}

.page-about .about-flow__step:nth-child(1) {
  border-top-color: var(--turquoise);
}

.page-about .about-flow__step:nth-child(5) {
  border-top-color: var(--crimson);
}

.page-about .about-flow__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  letter-spacing: 0.08em;
  color: var(--ochre);
}

.page-about .about-flow__name {
  margin: 6px 0 6px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 800;
  color: var(--paper-white);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--grey-blue);
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-partners {
  background: var(--indigo);
}

.page-about .about-partners__grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.page-about .about-partners__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .about-partners__list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-partners__list h3 {
  margin: 0 0 5px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 800;
  color: var(--paper-white);
}

.page-about .about-partners__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--grey-blue);
}

.page-about .about-partners__cta,
.page-about .about-honors__cta {
  margin-top: 20px;
}

.page-about .about-honors {
  background: rgba(17, 26, 51, 0.62);
  border: 1px solid var(--about-rule);
  padding: clamp(18px, 3vw, 30px);
}

.page-about .about-honors__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-honors__list li {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  border-left: 2px solid var(--crimson);
  padding-left: 12px;
}

.page-about .about-honors__year {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--ochre);
}

.page-about .about-honors__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper-white);
}

.page-about .about-honors__text {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--grey-blue);
}

/* ---------- 服务响应 ---------- */
.page-about .about-service {
  background: linear-gradient(180deg, var(--indigo-2) 0%, var(--deep) 100%);
}

.page-about .about-service__card {
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--paper-rule);
  padding: clamp(22px, 4vw, 46px);
  box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.26);
}

.page-about .about-service__card .eyebrow {
  color: var(--crimson);
}

.page-about .about-service__card .section-title {
  color: var(--ink);
}

.page-about .about-service__lead {
  margin: 14px 0 0;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(28, 27, 25, 0.82);
}

.page-about .about-service__contact {
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--about-paper-line);
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-service__contact dt {
  margin-bottom: 4px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(28, 27, 25, 0.58);
}

.page-about .about-service__contact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

.page-about .about-service__card p.about-service__note {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(28, 27, 25, 0.66);
  border-left: 2px solid var(--ochre);
  padding-left: 12px;
}

.page-about .about-service__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
}

.page-about .about-service__link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--crimson);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  transition: color 200ms ease-out;
}

.page-about .about-service__link:hover {
  color: var(--ink);
}

/* ---------- 断点 ---------- */
@media (min-width: 680px) {
  .page-about .about-values {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }

  .page-about .about-origin__figure {
    margin-top: 8px;
  }

  .page-about .about-timeline__head {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }

  .page-about .about-timeline__item:nth-child(even) {
    margin-left: 64px;
  }

  .page-about .about-team__head {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-about .about-flow__list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }
}

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

  .page-about .about-role:nth-child(even) {
    margin-top: 30px;
  }
}
<<<END>>>