.page-about {
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(40px, 6vw, 88px) 0 clamp(32px, 4vw, 56px);
  background:
    radial-gradient(120% 90% at 88% 8%, rgba(53, 196, 111, 0.10) 0%, rgba(53, 196, 111, 0) 58%),
    var(--night);
  border-bottom: var(--edge);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: end;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  letter-spacing: -0.02em;
  line-height: 1.06;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 46ch;
  color: var(--dim);
}

.page-about .about-hero__aside {
  display: none;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--stroke);
  border: var(--edge);
}

.page-about .about-fact {
  background: var(--night);
  padding: 18px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: background var(--dur) var(--ease);
}

.page-about .about-fact:hover {
  background: var(--panel);
}

.page-about .about-fact__num {
  font-size: 26px;
  font-weight: 500;
  color: var(--green);
  letter-spacing: 0.04em;
  line-height: 1;
}

.page-about .about-fact__label {
  font-size: 13px;
  color: var(--dim);
}

/* ---------- 通用章节头部 ---------- */
.page-about .about-sec {
  padding: clamp(56px, 8vw, 104px) 0;
}

.page-about .about-sec__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-sec__num {
  font-family: var(--f-serif);
  font-weight: 500;
  font-size: 44px;
  line-height: 0.9;
  color: var(--stroke);
  letter-spacing: 0.02em;
  transition: color var(--dur) var(--ease);
}

.page-about .about-sec:hover .about-sec__num {
  color: var(--orange);
}

.page-about .about-sec__title {
  margin: 0;
  max-width: 22ch;
}

.page-about .about-sec__intro {
  margin: 0;
  max-width: 62ch;
  color: var(--dim);
  font-size: 16px;
  line-height: 1.75;
}

/* ---------- 时间线 ---------- */
.page-about .about-sec--timeline {
  border-bottom: var(--edge);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 8px 0 8px 8px;
  display: grid;
  gap: 32px;
  transform: rotate(-6deg);
  transform-origin: left center;
}

.page-about .about-timeline__item {
  transform: rotate(6deg);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding-left: 18px;
  border-left: 1px solid var(--stroke);
  position: relative;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 22px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--stroke);
  transition: background var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover {
  border-left-color: var(--green);
}

.page-about .about-timeline__item:hover::before {
  background: var(--green);
}

.page-about .about-timeline__num {
  font-family: var(--f-serif);
  font-weight: 500;
  font-size: 44px;
  line-height: 1;
  color: var(--stroke);
  transition: color var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__num {
  color: var(--green);
}

.page-about .about-timeline__year {
  margin: 4px 0 6px;
  font-size: 13px;
  color: var(--orange);
  letter-spacing: 0.04em;
}

.page-about .about-timeline__title {
  margin: 0 0 10px;
}

.page-about .about-timeline__text {
  margin: 0;
  color: var(--dim);
  font-size: 16px;
  line-height: 1.75;
  max-width: 60ch;
}

.page-about .about-timeline__more {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  border-left: 1px solid var(--orange);
  padding-left: 0;
  transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease),
    padding-left var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__more,
.page-about .about-timeline__item:focus-within .about-timeline__more {
  max-height: 120px;
  opacity: 1;
  padding-left: 12px;
  margin-top: 12px;
}

/* ---------- 通栏图片 ---------- */
.page-about .about-shot {
  margin: 0;
}

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

.page-about .about-shot--band {
  border-top: var(--edge);
  border-bottom: var(--edge);
}

.page-about .about-shot--band img {
  aspect-ratio: 16 / 7;
}

.page-about .about-shot--flow img,
.page-about .about-shot--data img {
  aspect-ratio: 3 / 2;
}

/* ---------- 流程 ---------- */
.page-about .about-flow__wrap {
  display: grid;
  gap: 40px;
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-flow__step {
  position: relative;
  background: var(--panel);
  border: var(--edge);
  border-top: 2px solid var(--stroke);
  padding: 22px 18px 20px;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: border-top-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-flow__step:hover {
  border-top-color: var(--green);
  transform: translateY(-2px);
}

.page-about .about-flow__idx {
  display: block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
  margin-bottom: 12px;
}

.page-about .about-flow__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  line-height: 1.35;
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .about-team__card {
  background: var(--panel);
  border: var(--edge);
  padding: 24px 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-team__card:hover {
  border-color: var(--green);
}

.page-about .about-team__card--lg {
  background:
    linear-gradient(160deg, rgba(53, 196, 111, 0.10) 0%, rgba(53, 196, 111, 0) 62%),
    var(--panel);
}

.page-about .about-team__num {
  font-size: 40px;
  line-height: 1;
  font-weight: 500;
  color: var(--white);
  letter-spacing: 0.03em;
  transition: color var(--dur) var(--ease);
}

.page-about .about-team__card:hover .about-team__num {
  color: var(--orange);
}

.page-about .about-team__label {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--green);
}

.page-about .about-team__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--dim);
}

.page-about .about-team__meta {
  margin: 10px 0 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--dim);
  border-top: var(--edge);
  padding-top: 12px;
}

/* ---------- 数据条 ---------- */
.page-about .about-bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  border-top: var(--edge);
}

.page-about .about-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 22px 18px;
  border-bottom: var(--edge);
  background: var(--night);
  transition: background var(--dur) var(--ease);
}

.page-about .about-bar:hover {
  background: var(--panel);
}

.page-about .about-bar__num {
  font-size: 32px;
  line-height: 1;
  font-weight: 500;
  color: var(--green);
  letter-spacing: 0.04em;
  transition: color var(--dur) var(--ease);
}

.page-about .about-bar:hover .about-bar__num {
  color: var(--orange);
}

.page-about .about-bar__text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--dim);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence {
  list-style: none;
  margin: 0 0 40px;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--edge);
}

.page-about .about-cadence__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 24px 4px;
  border-bottom: var(--edge);
  transition: background var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-about .about-cadence__row:hover {
  background: rgba(255, 123, 51, 0.06);
  padding-left: 14px;
}

.page-about .about-cadence__val {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-cadence__val .mono {
  font-size: 42px;
  line-height: 1;
  font-weight: 500;
  color: var(--white);
  letter-spacing: 0.02em;
  transition: color var(--dur) var(--ease);
}

.page-about .about-cadence__row:hover .about-cadence__val .mono {
  color: var(--orange);
}

.page-about .about-cadence__unit {
  font-size: 15px;
  color: var(--dim);
}

.page-about .about-cadence__text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--dim);
}

.page-about .about-shot--data {
  border-top: var(--edge);
  padding-top: 40px;
}

/* ---------- 窄栏阅读 ---------- */
.page-about .about-sec--read {
  border-top: var(--edge);
  background:
    radial-gradient(90% 70% at 10% 100%, rgba(255, 123, 51, 0.08) 0%, rgba(255, 123, 51, 0) 60%),
    var(--night);
}

.page-about .about-read {
  max-width: 720px;
}

.page-about .about-read__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.page-about .about-read__body p {
  margin: 0 0 20px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--white);
  max-width: 68ch;
}

.page-about .about-next {
  margin-top: 36px;
  padding-top: 24px;
  border-top: var(--edge);
}

.page-about .about-next__lead {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--dim);
}

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

.page-about .about-next__list a {
  display: inline-block;
  color: var(--dim);
  font-size: 16px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-next__list a:hover,
.page-about .about-next__list a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--green);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-sec__head {
    grid-template-columns: 120px minmax(0, 1fr);
    grid-template-areas:
      "num title"
      "num intro";
    column-gap: 28px;
  }

  .page-about .about-sec__num {
    grid-area: num;
    font-size: 64px;
    padding-top: 4px;
  }

  .page-about .about-sec__title {
    grid-area: title;
  }

  .page-about .about-sec__intro {
    grid-area: intro;
    margin-top: 14px;
  }

  .page-about .about-bar {
    grid-template-columns: 160px minmax(0, 1fr);
    align-items: baseline;
    gap: 24px;
    padding: 22px 8px;
  }

  .page-about .about-cadence__row {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 32px;
    padding: 26px 8px;
  }

  .page-about .about-read__head {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: baseline;
  }

  .page-about .about-read__head .about-sec__num {
    font-size: 64px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 180px;
    gap: 48px;
  }

  .page-about .about-hero__aside {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 14px;
    padding-bottom: 8px;
  }

  .page-about .about-hero__rule {
    width: 1px;
    height: 120px;
    background: linear-gradient(to bottom, var(--green), rgba(53, 196, 111, 0));
  }

  .page-about .about-hero__stamp {
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--dim);
  }

  .page-about .about-hero__ticks {
    width: 100%;
  }

  .page-about .about-timeline {
    gap: 48px;
    padding-left: 24px;
    margin-right: -6%;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 28px;
    padding-left: 28px;
  }

  .page-about .about-timeline__num {
    font-size: 64px;
  }

  .page-about .about-flow__wrap {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

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

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    grid-template-rows: auto auto;
    gap: 20px;
  }

  .page-about .about-team__card--lg {
    grid-row: span 2;
    padding: 32px 28px;
  }

  .page-about .about-team__card--lg .about-team__num {
    font-size: 64px;
  }

  .page-about .about-bars {
    border-top: none;
  }

  .page-about .about-bar {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 40px;
  }

  .page-about .about-bar__num {
    font-size: 44px;
  }

  .page-about .about-cadence__row {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .page-about .about-cadence__val .mono {
    font-size: 56px;
  }
}

/* ---------- 大屏流程四列 ---------- */
@media (min-width: 1180px) {
  .page-about .about-flow__wrap {
    grid-template-columns: minmax(0, 1fr);
    gap: 44px;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 28px;
  }

  .page-about .about-flow__step::after {
    content: "";
    position: absolute;
    top: 33px;
    right: -26px;
    width: 26px;
    height: 1px;
    background: var(--stroke);
    transition: background var(--dur) var(--ease);
  }

  .page-about .about-flow__step::before {
    content: "";
    position: absolute;
    top: 29px;
    right: -26px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--stroke);
    transition: background var(--dur) var(--ease);
  }

  .page-about .about-flow__step:last-child::after,
  .page-about .about-flow__step:last-child::before {
    display: none;
  }

  .page-about .about-flow__step:hover::after,
  .page-about .about-flow__step:hover::before {
    background: var(--green);
  }

  .page-about .about-shot--flow {
    max-width: 100%;
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline,
  .page-about .about-timeline__item {
    transform: none;
  }

  .page-about .about-flow__step,
  .page-about .about-flow__step:hover {
    transform: none;
  }
}
<<<END>>>