.page-about {
  background:
    radial-gradient(90% 55% at 100% -8%, rgba(108, 59, 255, 0.34), transparent 62%),
    radial-gradient(60% 45% at -5% 18%, rgba(45, 245, 212, 0.09), transparent 60%),
    var(--ink-space);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.8;
  padding-bottom: clamp(56px, 9vw, 112px);
}

.page-about p {
  margin: 0 0 16px;
}

.page-about .about-crumb {
  padding-top: clamp(18px, 4vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(26px, 5vw, 54px);
}

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

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7.2vw, 66px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 14px 0 0;
  max-width: 16ch;
}

.page-about .about-hero .lead {
  margin-top: 20px;
  max-width: 46ch;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 17.5px);
}

.page-about .about-facts {
  list-style: none;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
}

.page-about .about-facts li {
  border-top: 2px solid var(--edge);
  padding-top: 10px;
  min-width: 0;
}

.page-about .about-facts b {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(19px, 3vw, 27px);
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-facts span {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
  margin-top: 4px;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 2px solid var(--edge);
  border-radius: var(--radius);
  background: var(--ink-panel);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

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

/* ---------- 档案骨架 ---------- */
.page-about .about-dossier {
  margin-top: clamp(46px, 8vw, 96px);
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .about-index__title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orange);
  margin: 0 0 12px;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__list li {
  flex: 0 0 auto;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 11px;
  border: 2px solid var(--edge);
  border-radius: 2px;
  color: var(--mist);
  font-size: 13.5px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
  background: rgba(45, 245, 212, 0.1);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--orange);
}

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

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding-block: clamp(28px, 4.5vw, 52px);
  border-top: 2px solid var(--edge);
  scroll-margin-top: 90px;
}

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

.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px 18px;
  align-items: start;
  margin-bottom: 20px;
}

.page-about .about-chapter__index {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(36px, 7vw, 68px);
  line-height: 0.86;
  letter-spacing: -0.03em;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--violet);
}

.page-about .about-chapter h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.4vw, 33px);
  line-height: 1.26;
  letter-spacing: 0.005em;
  margin: 0;
  padding-top: 4px;
  text-wrap: balance;
}

.page-about .about-body p {
  max-width: 62ch;
  color: rgba(247, 245, 255, 0.86);
  font-size: clamp(15px, 1.55vw, 16.5px);
}

.page-about .about-body a,
.page-about .about-body__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(45, 245, 212, 0.45);
}

.page-about .about-body a:hover,
.page-about .about-body__note a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 认证章节 ---------- */
.page-about .about-cert {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-specs {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border: 2px solid var(--edge);
  border-radius: var(--radius);
  background: var(--ink-panel);
  box-shadow: 4px 4px 0 rgba(58, 28, 140, 0.5);
}

.page-about .about-specs li {
  display: grid;
  gap: 3px;
  padding: 11px 14px;
  border-bottom: 2px solid var(--edge);
}

.page-about .about-specs li:last-child {
  border-bottom: 0;
}

.page-about .about-specs__k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-specs__v {
  font-size: 14.5px;
  color: rgba(247, 245, 255, 0.9);
}

.page-about .about-cert__figure {
  margin: 0;
  border: 2px solid var(--edge);
  border-radius: var(--radius);
  background: var(--ink-panel);
  overflow: hidden;
}

.page-about .about-cert__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 团队 ---------- */
.page-about .about-teams {
  display: grid;
  gap: 14px;
  margin-top: 6px;
}

.page-about .about-team {
  border: 2px solid var(--edge);
  border-radius: var(--radius);
  background: var(--ink-panel);
  box-shadow: 5px 5px 0 rgba(58, 28, 140, 0.55);
  transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-team[open] {
  border-color: var(--violet);
  box-shadow: var(--shadow-hard-lift);
}

.page-about .about-team summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 15px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-team summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
}

.page-about .about-team[open] summary::after {
  content: "－";
}

.page-about .about-team summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-about .about-team__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-space);
  background: var(--violet);
  border-radius: 2px;
  padding: 2px 7px;
}

.page-about .about-team__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16.5px;
  letter-spacing: 0.01em;
}

.page-about .about-team__body {
  padding: 0 15px 15px;
}

.page-about .about-team__body p {
  margin: 0;
  font-size: 14.5px;
  color: var(--mist);
}

.page-about .about-team-figure {
  margin: 24px 0 0;
  border: 2px solid var(--edge);
  border-radius: var(--radius);
  background: var(--ink-panel);
  overflow: hidden;
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.page-about .about-timeline li {
  position: relative;
  border-left: 2px solid var(--edge);
  padding: 0 0 clamp(24px, 3.4vw, 32px) 20px;
}

.page-about .about-timeline li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, 0.16);
}

.page-about .about-timeline li:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 42px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--violet);
}

.page-about .about-timeline__title {
  font-weight: 500;
  font-size: clamp(15.5px, 1.8vw, 17px);
  color: var(--paper);
  margin: 8px 0 4px;
}

.page-about .about-timeline__text {
  font-size: 14.5px;
  color: var(--mist);
  max-width: 56ch;
  margin: 0;
}

/* ---------- 合作 ---------- */
.page-about .about-partner-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .about-partner-tags li {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--cyan);
  border: 2px solid rgba(45, 245, 212, 0.45);
  border-radius: 2px;
  padding: 4px 10px;
}

/* ---------- 原则 ---------- */
.page-about .about-principles {
  display: grid;
  gap: 14px;
  margin-top: 8px;
}

.page-about .about-principle {
  border: 2px solid var(--edge);
  border-top: 4px solid var(--violet);
  border-radius: var(--radius);
  background: var(--ink-panel);
  padding: 16px 15px 18px;
  box-shadow: 4px 4px 0 rgba(58, 28, 140, 0.45);
}

.page-about .about-principle__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .about-principle h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17.5px;
  margin: 6px 0 8px;
  letter-spacing: 0.01em;
}

.page-about .about-principle p {
  margin: 0;
  font-size: 14.5px;
  color: var(--mist);
}

.page-about .about-body__note {
  margin-top: 22px;
  max-width: 62ch;
  font-size: 14.5px;
  color: var(--mist);
}

/* ---------- 尾部行动 ---------- */
.page-about .about-next {
  margin-top: clamp(34px, 5vw, 56px);
  border: 2px solid var(--violet);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(108, 59, 255, 0.22), rgba(45, 245, 212, 0.08));
  padding: clamp(20px, 3.4vw, 30px);
}

.page-about .about-next__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.8vw, 24px);
  margin: 0 0 16px;
  line-height: 1.35;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-specs li {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .about-cert {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

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

@media (min-width: 1024px) {
  .page-about .about-dossier {
    grid-template-columns: minmax(200px, 250px) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 92px;
  }

  .page-about .about-index__list {
    display: block;
    overflow: visible;
    border-top: 2px solid var(--edge);
  }

  .page-about .about-index__list li {
    border-bottom: 2px solid var(--edge);
  }

  .page-about .about-index__list a {
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
    align-items: baseline;
    width: 100%;
    padding: 9px 6px;
    border: 0;
    border-radius: 0;
    white-space: normal;
    font-size: 13.5px;
    line-height: 1.5;
  }

  .page-about .about-index__list a:hover,
  .page-about .about-index__list a:focus-visible {
    background: rgba(108, 59, 255, 0.18);
    border-color: transparent;
  }

  .page-about .about-index__years {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    color: var(--mist);
  }

  .page-about .about-index__years span {
    border: 1px solid var(--edge);
    border-radius: 2px;
    padding: 1px 6px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-timeline li {
    padding-left: 26px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__list a,
  .page-about .about-team {
    transition: none;
  }
}
<<<END>>>