.page-about {
  --about-rail: 44px;
  background: var(--deep);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  display: grid;
  gap: 28px;
  padding: 22px 0 10px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -30px;
  width: min(420px, 70vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(77, 240, 193, 0.15), rgba(77, 240, 193, 0) 68%);
  pointer-events: none;
}

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

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

.page-about .display-title {
  margin: 12px 0 0;
  font-size: clamp(30px, 7.4vw, 60px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

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

.page-about .about-hero__figure .media {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

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

.page-about .media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  line-height: 1.7;
  color: var(--ink-mute);
}

.page-about .about-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-stats li {
  padding: 16px 16px 15px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(155deg, rgba(14, 59, 67, 0.78), rgba(7, 26, 43, 0.32));
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 5.4vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--mint);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--ink-mute);
}

@media (min-width: 860px) {
  .page-about .about-hero {
    grid-template-columns: var(--about-rail) minmax(0, 1fr) minmax(0, 0.86fr);
    column-gap: 32px;
    row-gap: 40px;
    align-items: center;
    padding: 46px 0 18px;
  }

  .page-about .about-hero__rail {
    display: flex;
    justify-content: center;
    align-self: stretch;
  }

  .page-about .about-hero__rail .annotation {
    font-size: 12px;
    letter-spacing: 0.34em;
    color: rgba(217, 201, 163, 0.72);
  }

  .page-about .about-hero__main {
    grid-column: 2 / 3;
  }

  .page-about .about-hero__figure {
    grid-column: 3 / 4;
  }

  .page-about .about-hero__lead {
    font-size: 17px;
  }

  .page-about .about-stats {
    grid-column: 2 / 4;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
}

/* ---------- 目录 + 正文骨架 ---------- */

.page-about .about-body {
  display: grid;
  gap: 30px;
  padding: 34px 0 60px;
}

.page-about .about-toc {
  padding: 16px 0 0;
  border-top: 1px solid var(--line-soft);
}

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

.page-about .about-toc .toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
}

.page-about .about-toc .toc__link {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--ink-mute);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-about .about-toc .toc__link:hover,
.page-about .about-toc .toc__link:focus-visible {
  color: var(--mint);
  border-color: var(--line);
  background: rgba(77, 240, 193, 0.07);
}

.page-about .about-toc .toc__link[aria-current="true"] {
  color: var(--deep);
  background: var(--mint);
  border-color: var(--mint);
}

@media (min-width: 1040px) {
  .page-about .about-body {
    grid-template-columns: 196px minmax(0, 1fr);
    column-gap: 56px;
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    border-top: 0;
    padding-top: 6px;
  }

  .page-about .about-toc .toc__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-about .about-toc .toc__link {
    width: 100%;
    padding: 9px 10px;
    border: 0;
    border-left: 2px solid var(--line-soft);
    border-radius: 0;
    background: none;
    text-align: left;
  }

  .page-about .about-toc .toc__link:hover,
  .page-about .about-toc .toc__link:focus-visible {
    background: none;
    border-left-color: var(--mint);
  }

  .page-about .about-toc .toc__link[aria-current="true"] {
    background: none;
    color: var(--mint);
    border-left-color: var(--mint);
  }
}

/* ---------- 章节通用 ---------- */

.page-about .about-section {
  padding: 36px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-section__head {
  margin-bottom: 22px;
}

.page-about .about-section__title {
  margin: 10px 0 0;
  font-size: clamp(23px, 3.6vw, 34px);
  line-height: 1.3;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-section__intro {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-section__body .prose p {
  margin: 0 0 16px;
  color: var(--ink-soft);
  line-height: 1.85;
  font-size: 16px;
}

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

.page-about .about-figure {
  margin: 0 0 26px;
}

.page-about .about-figure .media {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
}

.page-about .about-figure--narrow {
  max-width: 620px;
  margin: 26px 0;
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 28px;
  position: relative;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, rgba(77, 240, 193, 0.9) 0%, rgba(77, 240, 193, 0.06) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 9px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(77, 240, 193, 0.14);
}

.page-about .about-timeline__year {
  display: inline-block;
  margin-bottom: 7px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--mint);
}

.page-about .about-timeline__card h3 {
  margin: 0 0 8px;
  font-size: 17.5px;
  line-height: 1.45;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-timeline__card p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

@media (min-width: 860px) {
  .page-about .about-timeline__list {
    padding-left: 30px;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 92px minmax(0, 1fr);
    column-gap: 26px;
    padding-bottom: 32px;
  }

  .page-about .about-timeline__item::before {
    left: -30px;
    top: 12px;
  }

  .page-about .about-timeline__year {
    margin-bottom: 0;
    padding-top: 3px;
    font-size: 21px;
    line-height: 1.3;
  }

  .page-about .about-timeline__card {
    padding-bottom: 20px;
    border-bottom: 1px solid var(--line-soft);
  }

  .page-about .about-timeline__item:last-child .about-timeline__card {
    border-bottom: 0;
    padding-bottom: 0;
  }
}

/* ---------- 团队 ---------- */

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

.page-about .about-team__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-num {
  padding: 18px 16px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: linear-gradient(160deg, rgba(37, 38, 90, 0.62), rgba(7, 26, 43, 0.45));
}

.page-about .about-num__v {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 8vw, 54px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-num__k {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
}

.page-about .about-team__text {
  max-width: 62ch;
}

.page-about .about-team__text p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

@media (min-width: 780px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    column-gap: 40px;
    align-items: start;
  }

  .page-about .about-team__figures {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

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

.page-about .about-flow__step {
  position: relative;
  padding: 20px 20px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: linear-gradient(150deg, rgba(14, 59, 67, 0.6), rgba(7, 26, 43, 0.35));
}

.page-about .about-flow__step::after {
  content: "";
  position: absolute;
  left: 20px;
  bottom: 0;
  width: 42px;
  height: 2px;
  border-radius: 2px;
  background: var(--orange);
}

.page-about .about-flow__idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mint);
}

.page-about .about-flow__step h3 {
  margin: 8px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-flow__step p {
  margin: 0 0 6px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

@media (min-width: 760px) {
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

/* ---------- 覆盖规模 ---------- */

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

.page-about .about-reach__card {
  padding: 22px 20px 20px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
  background: linear-gradient(155deg, rgba(14, 59, 67, 0.72), rgba(7, 26, 43, 0.4));
}

.page-about .about-reach__card--hero {
  background: linear-gradient(150deg, rgba(90, 31, 46, 0.88), rgba(37, 38, 90, 0.6));
  border-color: rgba(255, 106, 42, 0.32);
}

.page-about .about-reach__card--wide {
  background: linear-gradient(150deg, rgba(37, 38, 90, 0.82), rgba(7, 26, 43, 0.5));
}

.page-about .about-reach__v {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 6.6vw, 44px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.01em;
  color: var(--mint);
}

.page-about .about-reach__card--hero .about-reach__v {
  color: var(--orange);
  font-size: clamp(34px, 8vw, 56px);
}

.page-about .about-reach__card h3 {
  margin: 10px 0 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--mist);
}

.page-about .about-reach__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-reach__card .pill {
  margin-bottom: 12px;
}

@media (min-width: 760px) {
  .page-about .about-reach {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-reach__card--hero {
    grid-column: span 2;
    grid-row: span 2;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 240px;
  }

  .page-about .about-reach__card--wide {
    grid-column: span 2;
  }
}

/* ---------- 协作生态 ---------- */

.page-about .about-network {
  display: grid;
  gap: 14px;
}

.page-about .about-network__item {
  padding: 24px 20px 22px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
  background: linear-gradient(155deg, rgba(14, 59, 67, 0.78), rgba(7, 26, 43, 0.42));
}

.page-about .about-network__item--wine {
  background: linear-gradient(155deg, rgba(90, 31, 46, 0.85), rgba(7, 26, 43, 0.5));
  border-color: rgba(217, 201, 163, 0.2);
}

.page-about .about-network__item--indigo {
  background: linear-gradient(155deg, rgba(37, 38, 90, 0.85), rgba(7, 26, 43, 0.5));
}

.page-about .about-network__v {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(38px, 9vw, 60px);
  font-weight: 700;
  line-height: 1;
  color: var(--sand);
}

.page-about .about-network__item--wine .about-network__v {
  color: var(--orange);
}

.page-about .about-network__item--indigo .about-network__v {
  color: var(--mint);
}

.page-about .about-network__item h3 {
  margin: 12px 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-network__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

@media (min-width: 800px) {
  .page-about .about-network {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-network__item {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 230px;
  }
}

.page-about .about-note {
  margin-top: 24px;
  padding: 18px 20px;
  border-left: 3px solid var(--sand);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(217, 201, 163, 0.06);
}

.page-about .about-note p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-link {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(77, 240, 193, 0.4);
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--orange);
  border-bottom-color: rgba(255, 106, 42, 0.6);
}

.page-about .about-reach__card .about-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 14px;
}

/* ---------- 联络 ---------- */

.page-about .about-contact {
  display: grid;
  gap: 16px;
}

.page-about .about-contact__primary {
  padding: 24px 20px 22px;
  border-radius: var(--r-lg);
  border: 1px solid rgba(255, 106, 42, 0.3);
  background: linear-gradient(155deg, rgba(90, 31, 46, 0.72), rgba(7, 26, 43, 0.55));
}

.page-about .about-contact__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--sand);
}

.page-about .about-contact__mail {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 4vw, 21px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.01em;
  color: var(--mist);
  word-break: break-all;
}

.page-about .about-contact__desc {
  margin: 14px 0 20px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-contact__side {
  display: grid;
  gap: 12px;
}

.page-about .about-contact__row {
  padding: 16px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: rgba(14, 59, 67, 0.45);
}

.page-about .about-contact__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
}

.page-about .about-contact__val {
  display: block;
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
  word-break: break-word;
}

.page-about .about-contact__hint {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-mute);
}

@media (min-width: 860px) {
  .page-about .about-contact {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 20px;
    align-items: start;
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc .toc__link,
  .page-about .about-link {
    transition: none;
  }
}
<<<END>>>