.page-about {
  --about-line: rgba(199, 208, 217, 0.18);
  --about-line-ink: rgba(11, 11, 15, 0.12);
  --about-gap: clamp(40px, 6vw, 96px);
  background: var(--deep);
  color: var(--warm);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(24px, 4vw, 44px) 0 clamp(36px, 5vw, 72px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  margin-top: clamp(24px, 4vw, 48px);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(34px, 6.6vw, 78px);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--paper);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--orange);
}

.page-about .about-hero__lede {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 38em;
  font-size: clamp(15.5px, 1.5vw, 18px);
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-facts {
  margin: 0;
  border-top: 1px solid var(--about-line);
  align-self: end;
}

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-facts__key {
  font-size: 14px;
  color: var(--mist);
}

.page-about .about-facts__value {
  margin: 0;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-facts__value--hot {
  color: var(--orange);
}

.page-about .about-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-toc__link {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--about-line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease),
    background-color var(--t-fast) var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--paper);
  border-color: rgba(255, 90, 31, 0.55);
  background: rgba(255, 90, 31, 0.12);
}

.page-about .about-hero__media {
  margin-top: clamp(32px, 5vw, 64px);
}

/* ---------- 图片 ---------- */
.page-about .media {
  margin: 0;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--night);
}

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

.page-about .media__caption {
  padding: 12px 18px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  border-top: 1px solid var(--about-line);
}

.page-about .about-figure {
  margin-top: clamp(32px, 4vw, 52px);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding: clamp(44px, 6vw, 84px) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: clamp(32px, 4vw, 56px);
}

.page-about .about-chapter__head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(24px, 3vw, 40px);
}

.page-about .about-chapter__index {
  display: block;
  font-size: clamp(44px, 8vw, 92px);
  line-height: 0.85;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(199, 208, 217, 0.5);
  opacity: 0.6;
}

.page-about .about-chapter__eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-chapter__title {
  margin: 10px 0 0;
  font-size: clamp(23px, 3.4vw, 40px);
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .about-chapter__body {
  display: grid;
  gap: clamp(26px, 3.4vw, 50px);
}

.page-about .about-chapter__text p {
  margin: 0 0 1.1em;
  font-size: clamp(15.5px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

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

.page-about .about-chapter__intro {
  margin: 0;
  max-width: 40em;
  font-size: clamp(15.5px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 clamp(18px, 2.6vw, 30px);
  border-left: 1px solid var(--about-line);
  display: grid;
  gap: clamp(20px, 2.8vw, 32px);
}

.page-about .about-timeline__item {
  position: relative;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 8px;
  left: calc(-1 * clamp(18px, 2.6vw, 30px) - 4.5px);
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--night);
  border: 1px solid var(--cyan);
}

.page-about .about-timeline__item--hot::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 90, 31, 0.16);
}

.page-about .about-timeline__time {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-timeline__item--hot .about-timeline__time {
  color: var(--orange);
}

.page-about .about-timeline__title {
  margin: 7px 0 5px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience {
  margin-top: clamp(20px, 2.6vw, 32px);
}

.page-about .about-audience__item {
  padding: clamp(18px, 2.4vw, 26px) 0;
  border-top: 1px solid var(--about-line);
  display: grid;
  gap: 10px;
}

.page-about .about-audience__name {
  margin: 0;
  font-size: 17.5px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-audience__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 标签云 ---------- */
.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(22px, 3vw, 32px);
}

/* ---------- 数据侧栏 ---------- */
.page-about .about-metrics {
  display: grid;
  gap: 22px;
  align-content: start;
  padding-top: 6px;
}

.page-about .about-metric__label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-about .about-metric__value {
  color: var(--orange);
  font-weight: 700;
}

.page-about .about-metric__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(11, 11, 15, 0.62);
}

/* ---------- 团队侧栏 ---------- */
.page-about .about-side {
  align-self: start;
}

.page-about .about-bullets {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-bullets__item {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-bullets__k {
  min-width: 2.6em;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-bullets__v {
  font-size: 14.5px;
  color: var(--mist);
}

/* ---------- 生态数字 ---------- */
.page-about .about-partners {
  display: grid;
  gap: clamp(18px, 2.6vw, 30px);
  margin: clamp(24px, 3.4vw, 40px) 0 clamp(28px, 4vw, 48px);
}

.page-about .about-partners__stat {
  padding: clamp(20px, 2.6vw, 30px) 0 0;
  border-top: 2px solid var(--orange);
}

.page-about .about-partners__num {
  margin: 0;
  font-size: clamp(38px, 6vw, 62px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .about-partners__num span {
  color: var(--orange);
}

.page-about .about-partners__label {
  margin: 12px 0 0;
  max-width: 26em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-disclosures {
  border-top: 1px solid var(--about-line);
}

/* ---------- 下一步入口 ---------- */
.page-about .about-next {
  display: grid;
  border-top: 1px solid var(--about-line);
}

.page-about .about-next__item {
  display: grid;
  gap: 6px;
  padding: clamp(16px, 2.2vw, 22px) 0;
  border-bottom: 1px solid var(--about-line);
  text-decoration: none;
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .about-next__item:hover,
.page-about .about-next__item:focus-visible {
  transform: translateX(6px);
  border-bottom-color: rgba(255, 90, 31, 0.5);
}

.page-about .about-next__label {
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-next__text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-next__item:hover .about-next__text,
.page-about .about-next__item:focus-visible .about-next__text {
  color: var(--paper);
}

/* ---------- 底部行动区 ---------- */
.page-about .about-cta-band {
  padding-bottom: clamp(48px, 6vw, 88px);
}

.page-about .about-cta {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
  align-items: center;
}

.page-about .about-cta__eyebrow {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(24px, 3.6vw, 42px);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.page-about .about-cta__lede {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(11, 11, 15, 0.72);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 浅色分区修正 ---------- */
.page-about .about-band--light .about-chapter {
  border-top-color: var(--about-line-ink);
}

.page-about .about-band--light .about-chapter:first-child {
  border-top: 0;
}

.page-about .about-chapter--light .about-chapter__index {
  -webkit-text-stroke-color: rgba(11, 11, 15, 0.34);
}

.page-about .about-chapter--light .about-chapter__eyebrow {
  color: var(--orange);
}

.page-about .about-chapter--light .about-chapter__title {
  color: var(--ink);
}

.page-about .about-chapter--light .about-chapter__text p {
  color: rgba(11, 11, 15, 0.74);
}

.page-about .about-band--light .chip {
  border-color: rgba(11, 11, 15, 0.16);
  color: rgba(11, 11, 15, 0.78);
  background: var(--paper);
}

/* ---------- 渐显（仅在 JS 就绪时生效） ---------- */
@media (prefers-reduced-motion: no-preference) {
  .page-about .js-reveal:not(.is-visible) {
    opacity: 0;
    transform: translateY(16px);
  }

  .page-about .js-reveal {
    transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
  }
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(24px, 3vw, 44px);
  }

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

  .page-about .about-next__item {
    padding-right: clamp(16px, 2.4vw, 32px);
  }
}

@media (min-width: 860px) {
  .page-about .about-chapter__head {
    grid-template-columns: clamp(96px, 10vw, 140px) minmax(0, 1fr);
    gap: clamp(20px, 2.6vw, 36px);
    align-items: start;
  }

  .page-about .about-audience__item {
    grid-template-columns: minmax(180px, 220px) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 40px);
    align-items: baseline;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-chapter__body {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  }

  .page-about .about-chapter__body--single {
    grid-template-columns: minmax(0, 1fr);
    max-width: 46em;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    justify-items: end;
    text-align: left;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
    max-width: 22em;
  }
}

@media (min-width: 1180px) {
  .page-about .about-timeline {
    padding-left: 34px;
  }

  .page-about .about-timeline__item::before {
    left: -38.5px;
  }
}
<<<END>>>