.page-about {
  --about-hair: rgba(44, 90, 120, 0.58);
  --about-tint: rgba(25, 211, 255, 0.08);
  background: var(--ink);
  color: var(--mist);
  padding-bottom: clamp(2.4rem, 6vw, 4.5rem);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.1rem, 2.6vw, 1.8rem) 0 clamp(2.2rem, 5vw, 3.6rem);
  border-bottom: 2px solid var(--line);
  background:
    radial-gradient(120% 90% at 82% 0%, rgba(25, 211, 255, 0.16), transparent 62%),
    linear-gradient(180deg, #061726 0%, var(--ink) 100%);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.4rem, 3.4vw, 2.6rem);
  margin-top: clamp(1.2rem, 3vw, 2.2rem);
}

.page-about .about-hero__title {
  margin: 0.55rem 0 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(1.85rem, 7vw, 3.15rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--mist);
}

.page-about .about-hero__lede {
  margin: clamp(0.9rem, 2vw, 1.3rem) 0 0;
  max-width: 40rem;
  font-size: clamp(0.95rem, 2.6vw, 1.06rem);
  line-height: 1.85;
  color: var(--dim-strong);
}

.page-about .about-hero__figure {
  margin: 0;
  border: 3px solid var(--line);
  background: var(--deep);
  box-shadow: 10px 10px 0 rgba(4, 17, 28, 0.85);
}

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

.page-about .about-hero__cap {
  display: block;
  padding: 0.6rem 0.85rem;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan-soft);
  border-top: 2px solid var(--line);
  background: rgba(4, 17, 28, 0.72);
}

/* ---------- 主体编排 ---------- */
.page-about .about-main {
  padding-top: clamp(1.8rem, 4vw, 3rem);
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.4rem, 3vw, 2.4rem);
}

.page-about .about-toc {
  align-self: start;
  border-left: 3px solid var(--cyan);
  padding: 0.15rem 0 0.15rem 0.85rem;
}

.page-about .about-toc .toc__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--dim);
  text-transform: uppercase;
}

.page-about .about-toc .toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1rem;
}

.page-about .about-toc .toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  color: var(--mist);
  font-size: 0.85rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 0.15rem;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-toc .toc__link .mono {
  font-size: 11px;
  color: var(--orange);
  letter-spacing: 0.08em;
}

.page-about .about-toc .toc__link:hover,
.page-about .about-toc .toc__link:focus-visible,
.page-about .about-toc .toc__link.is-active {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  outline: none;
}

/* ---------- 章节通用 ---------- */
.page-about .about-body {
  min-width: 0;
  display: grid;
  gap: clamp(2rem, 5vw, 3.4rem);
}

.page-about .about-sec {
  scroll-margin-top: calc(var(--header-h) + 1rem);
  padding-top: clamp(0.4rem, 1.4vw, 0.9rem);
  border-top: 2px solid var(--line);
}

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

.page-about .about-sec__head {
  margin-bottom: clamp(0.9rem, 2.2vw, 1.4rem);
}

.page-about .about-sec__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(1.35rem, 4.6vw, 2rem);
  line-height: 1.3;
  letter-spacing: -0.008em;
  color: var(--mist);
}

.page-about .prose p {
  margin: 0 0 1.05rem;
  max-width: 40rem;
  font-size: 0.97rem;
  line-height: 1.9;
  color: var(--dim-strong);
}

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

.page-about .about-sec__foot {
  margin: clamp(1rem, 2.6vw, 1.6rem) 0 0;
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--orange);
  background: var(--about-tint);
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--dim-strong);
}

.page-about .about-sec__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 211, 255, 0.5);
}

.page-about .about-sec__foot a:hover,
.page-about .about-sec__foot a:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
  outline: none;
}

/* ---------- 时间线 ---------- */
.page-about .times {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(0.8rem, 2vw, 1.1rem);
}

.page-about .times__item {
  display: grid;
  grid-template-columns: 4.2rem minmax(0, 1fr);
  gap: clamp(0.7rem, 2vw, 1.3rem);
  align-items: start;
}

.page-about .times__year {
  font-size: clamp(1.3rem, 4.4vw, 1.9rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.03em;
  color: var(--orange);
  padding-top: 0.55rem;
  border-top: 3px solid var(--orange);
}

.page-about .times__card {
  border: 2px solid var(--line);
  background: var(--deep);
  padding: clamp(0.8rem, 2vw, 1.05rem) clamp(0.85rem, 2vw, 1.15rem);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.page-about .times__item:hover .times__card,
.page-about .times__item:focus-within .times__card {
  border-color: var(--cyan);
  transform: translateY(-2px);
  box-shadow: 6px 6px 0 rgba(25, 211, 255, 0.18);
}

.page-about .times__name {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--cyan-soft);
  letter-spacing: 0.01em;
}

.page-about .times__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.82;
  color: var(--dim-strong);
}

/* ---------- 深海蓝章节 ---------- */
.page-about .about-sec--deep {
  background: linear-gradient(160deg, var(--deep) 0%, #061e33 100%);
  border: 3px solid var(--line);
  border-top: 6px solid var(--cyan);
  padding: clamp(1.1rem, 3vw, 1.9rem);
  box-shadow: 12px 12px 0 rgba(4, 17, 28, 0.9);
}

.page-about .coverage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.1rem, 3vw, 1.9rem);
}

.page-about .coverage__figure {
  margin: 0;
  border: 2px solid var(--line);
  background: var(--ink);
}

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

.page-about .coverage__cap {
  display: block;
  padding: 0.55rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.09em;
  color: var(--dim);
  border-top: 2px solid var(--line);
}

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

.page-about .coverage__net {
  display: block;
  width: 100%;
  height: auto;
  max-height: 220px;
  margin-bottom: 0.9rem;
  border: 2px solid var(--line);
  background: rgba(4, 17, 28, 0.55);
}

.page-about .coverage__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.page-about .coverage__fact {
  display: grid;
  grid-template-columns: 3.6rem minmax(0, 1fr);
  gap: 0.7rem;
  align-items: start;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--about-hair);
}

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

.page-about .coverage__k {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
  padding-top: 0.25rem;
}

.page-about .coverage__v {
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--dim-strong);
}

/* ---------- 团队 ---------- */
.page-about .team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.1rem, 3vw, 1.9rem);
}

.page-about .team__intro > p {
  margin: 0 0 1.1rem;
  max-width: 40rem;
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--dim-strong);
}

.page-about .team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .team__row {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr);
  gap: 0.75rem;
  align-items: start;
  padding: 0.8rem 0.9rem;
  border: 2px solid var(--line);
  background: var(--navy);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-about .team__row:hover,
.page-about .team__row:focus-within {
  border-color: var(--cyan);
  background: #0f4b74;
}

.page-about .team__code {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--orange);
  line-height: 1.4;
}

.page-about .team__name {
  margin: 0 0 0.28rem;
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .team__text {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.8;
  color: var(--dim-strong);
}

.page-about .team__figure {
  margin: 0;
  border: 3px solid var(--line);
  background: var(--deep);
  box-shadow: 10px 10px 0 rgba(4, 17, 28, 0.85);
}

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

.page-about .team__cap {
  display: block;
  padding: 0.55rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.09em;
  color: var(--cyan-soft);
  border-top: 2px solid var(--line);
  background: rgba(4, 17, 28, 0.7);
}

/* ---------- 纸白章节 ---------- */
.page-about .about-sec--paper {
  background: var(--paper);
  color: var(--ink);
  border: 3px solid var(--ink);
  border-top: 6px solid var(--orange);
  padding: clamp(1.1rem, 3vw, 1.9rem);
  box-shadow: 12px 12px 0 rgba(25, 211, 255, 0.28);
}

.page-about .about-sec--paper .about-sec__title {
  color: var(--ink);
}

.page-about .principles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
}

.page-about .principles__item {
  border: 2px solid var(--ink);
  background: #ffffff;
  padding: 0.95rem 1rem;
}

.page-about .principles__name {
  margin: 0 0 0.45rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--deep);
  padding-left: 0.6rem;
  border-left: 4px solid var(--orange);
}

.page-about .principles__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: #29465a;
}

.page-about .about-sec--paper .about-sec__foot {
  background: rgba(14, 65, 102, 0.07);
  border-left-color: var(--orange);
  color: #29465a;
}

.page-about .about-sec--paper .about-sec__foot a {
  color: var(--navy);
  border-bottom-color: rgba(14, 65, 102, 0.45);
}

.page-about .about-sec--paper .about-sec__foot a:hover,
.page-about .about-sec--paper .about-sec__foot a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 浮起返回顶部 ---------- */
.page-about .to-top {
  border: 2px solid var(--cyan);
  background: var(--ink);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .to-top:hover,
.page-about .to-top:focus-visible {
  background: var(--cyan);
  color: var(--ink);
  outline: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .coverage {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }

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

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

  .page-about .times__item {
    grid-template-columns: 5.4rem minmax(0, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    gap: clamp(1.8rem, 3.4vw, 3rem);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--header-h) + 1.2rem);
  }

  .page-about .about-toc .toc__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0.65rem;
  }

  .page-about .about-toc .toc__link {
    font-size: 0.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .times__card,
  .page-about .team__row,
  .page-about .about-toc .toc__link {
    transition: none;
  }

  .page-about .times__item:hover .times__card,
  .page-about .times__item:focus-within .times__card {
    transform: none;
  }
}
<<<END>>>