.page-about {
  --about-rail: 232px;
  --about-ink: #2A3A5C;
  --about-ink-soft: #4A5B7E;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(18px, 3vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(22px, 3.5vw, 44px) 0 clamp(40px, 6vw, 78px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-hero__text h1 {
  max-width: 18ch;
  margin-top: 14px;
}

.page-about .about-hero__text .lede {
  margin-top: 18px;
  max-width: 56ch;
  color: var(--muted);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__meta .tag {
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  padding: 7px 15px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
  background: rgba(30, 58, 99, 0.4);
}

.page-about .about-hero__visual {
  margin: 0;
  border-radius: var(--r-frame);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
    gap: clamp(32px, 5vw, 72px);
  }
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 56px);
  padding-bottom: clamp(64px, 9vw, 130px);
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 84px);
    align-items: start;
  }
}

/* ---------- 左侧索引 ---------- */
.page-about .about-rail {
  position: static;
}

.page-about .about-rail .toc__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 14px;
}

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

.page-about .about-rail .toc__link {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.4;
  color: var(--muted);
  text-decoration: none;
  transition: color 180ms ease, border-color 180ms ease, background 180ms ease;
}

.page-about .about-rail .toc__link:hover,
.page-about .about-rail .toc__link:focus-visible {
  color: var(--neon);
  border-color: var(--neon);
}

.page-about .about-rail .toc__link[aria-current="true"],
.page-about .about-rail .toc__link[aria-current="location"],
.page-about .about-rail .toc__link.is-current {
  color: var(--void);
  background: var(--flare);
  border-color: var(--flare);
}

@media (min-width: 1000px) {
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 32px);
    align-self: start;
    border-left: 2px solid var(--line);
    padding-left: 20px;
  }

  .page-about .about-rail .toc__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 4px;
  }

  .page-about .about-rail .toc__link {
    display: block;
    border: 0;
    border-radius: 0;
    padding: 9px 0;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.03em;
    color: var(--muted);
    background: none;
  }

  .page-about .about-rail .toc__link:hover,
  .page-about .about-rail .toc__link:focus-visible {
    color: var(--neon);
    background: none;
  }

  .page-about .about-rail .toc__link[aria-current="true"],
  .page-about .about-rail .toc__link[aria-current="location"],
  .page-about .about-rail .toc__link.is-current {
    color: var(--flare);
    background: none;
    font-weight: 700;
  }
}

/* ---------- 章节通用 ---------- */
.page-about .about-content {
  min-width: 0;
}

.page-about .about-sec + .about-sec {
  margin-top: clamp(48px, 7vw, 96px);
  padding-top: clamp(40px, 6vw, 76px);
  border-top: 1px solid var(--line);
}

.page-about .about-sec__head {
  max-width: 34ch;
  margin-bottom: clamp(22px, 3vw, 38px);
}

.page-about .about-sec__head .section-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin-bottom: 12px;
}

.page-about .about-sec__head .section-title {
  margin: 0;
}

.page-about .about-sec__grid {
  display: grid;
  gap: clamp(20px, 3vw, 38px);
}

@media (min-width: 740px) {
  .page-about .about-sec__grid {
    grid-template-columns: minmax(0, 1fr) 208px;
    align-items: start;
  }

  .page-about .about-sec--flip .about-sec__grid {
    grid-template-columns: 208px minmax(0, 1fr);
  }

  .page-about .about-sec--flip .about-sec__main {
    order: 2;
  }

  .page-about .about-sec--flip .about-note {
    order: 1;
  }
}

.page-about .about-sec__main {
  min-width: 0;
}

.page-about .about-sec__main .prose p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-sec__main .prose p:first-child {
  color: var(--mist);
}

.page-about .about-note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  border-left: 2px solid var(--flare);
  padding-left: 16px;
}

.page-about .about-note p {
  margin: 0;
}

/* ---------- 团队卡片 ---------- */
.page-about .about-team {
  display: grid;
  gap: 14px;
  margin-top: clamp(26px, 4vw, 40px);
}

@media (min-width: 640px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-team__card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 22px 20px 24px;
  overflow: hidden;
}

.page-about .about-team__card::after {
  content: "";
  position: absolute;
  right: -32px;
  top: -32px;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(182, 255, 59, 0.16), transparent 70%);
  pointer-events: none;
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: 40px;
  line-height: 1;
  font-weight: 700;
  color: var(--neon);
  margin: 0 0 12px;
}

.page-about .about-team__name {
  font-size: 16px;
  font-weight: 600;
  color: var(--mist);
  margin: 0 0 8px;
}

.page-about .about-team__desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
  margin: 0;
}

/* ---------- 通用配图 ---------- */
.page-about .about-figure {
  margin: clamp(26px, 4vw, 40px) 0 0;
  border-radius: var(--r-frame);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

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

.page-about .about-figure--wide img {
  aspect-ratio: 3 / 2;
}

.page-about .about-figure .media-frame__caption {
  display: block;
  padding: 14px 20px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ---------- 协作生态 ---------- */
.page-about .about-eco {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(26px, 4vw, 40px);
}

@media (min-width: 780px) {
  .page-about .about-eco {
    grid-template-columns: minmax(0, 1fr) 220px;
    align-items: center;
  }
}

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

@media (min-width: 520px) {
  .page-about .about-eco__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-eco__stats .stat {
  background: rgba(30, 58, 99, 0.45);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 20px 18px;
}

.page-about .about-eco__stats .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  margin: 0 0 8px;
}

.page-about .about-eco__stats .stat__label {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}

.page-about .about-figure--square {
  margin-top: 0;
}

.page-about .about-figure--square img {
  aspect-ratio: 1 / 1;
}

/* ---------- 服务响应 ---------- */
.page-about .about-service {
  border-top: 1px solid var(--line);
}

.page-about .about-service__row {
  display: grid;
  gap: 8px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 680px) {
  .page-about .about-service__row {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

.page-about .about-service__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--neon);
  margin: 0;
}

.page-about .about-service__val {
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
  margin: 0;
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  margin-top: clamp(22px, 3vw, 34px);
  padding-left: 22px;
  border-left: 1px solid var(--line);
}

.page-about .about-milestone {
  position: relative;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 26px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--flare);
  box-shadow: 0 0 0 4px rgba(255, 106, 26, 0.14);
}

.page-about .about-milestone[open]::before {
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(182, 255, 59, 0.16);
}

.page-about .about-milestone > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: baseline;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .about-milestone > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-milestone > summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--muted);
}

.page-about .about-milestone[open] > summary::after {
  content: "−";
  color: var(--neon);
}

.page-about .about-milestone__ver {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-milestone__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--mist);
  line-height: 1.5;
}

.page-about .about-milestone__body {
  padding: 0 0 20px;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 荣誉（亮底反相） ---------- */
.page-about .about-awards {
  display: grid;
  gap: 0;
  background: var(--light);
  border-radius: var(--r-frame);
  padding: clamp(24px, 4vw, 44px);
  color: var(--about-ink);
}

.page-about .about-awards__item {
  padding: 20px 0;
  border-top: 1px solid rgba(11, 27, 51, 0.14);
}

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

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

.page-about .about-awards__lead {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  font-weight: 700;
  color: #B4480A;
  margin: 0 0 8px;
}

.page-about .about-awards__text {
  font-size: 15px;
  line-height: 1.72;
  color: var(--about-ink-soft);
  margin: 0;
  max-width: 62ch;
}

@media (min-width: 760px) {
  .page-about .about-awards__item {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }

  .page-about .about-awards__lead {
    margin-bottom: 0;
  }
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  margin-top: clamp(48px, 7vw, 92px);
  background:
    linear-gradient(120deg, rgba(11, 27, 51, 0) 42%, rgba(255, 106, 26, 0.16) 100%),
    var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-frame);
  padding: clamp(26px, 4.5vw, 52px);
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

@media (min-width: 860px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: clamp(28px, 4vw, 56px);
  }
}

.page-about .about-cta__text .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin-bottom: 12px;
}

.page-about .about-cta__text .section-title {
  margin: 0;
}

.page-about .about-cta__lede {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

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

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