.page-about {
  --about-gap: clamp(1.25rem, 3vw, 2.5rem);
  --about-soft: #5C7A73;
  background: var(--ink);
  color: var(--text-light);
}

.page-about h2 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: .045em;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  line-height: 1.24;
  margin: .5rem 0 0;
}

.page-about h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: .03em;
  font-size: 1.0625rem;
  line-height: 1.4;
  margin: 0;
}

.page-about p {
  line-height: 1.78;
}

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

.page-about .section {
  background: var(--ink);
  color: var(--text-light);
}

.page-about .section--paper {
  background: var(--paper);
  color: var(--ink-deep);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 3rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(120% 96% at 82% -14%, rgba(43, 245, 200, .18), transparent 58%),
    radial-gradient(88% 70% at -6% 4%, rgba(43, 245, 200, .10), transparent 62%),
    linear-gradient(178deg, #08302A 0%, var(--ink) 68%);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(155, 255, 233, .05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(155, 255, 233, .05) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .8), transparent 72%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .8), transparent 72%);
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
  margin-top: 1.5rem;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: .05em;
  font-size: clamp(2rem, 5.4vw, 3.5rem);
  line-height: 1.14;
  margin: .65rem 0 0;
  color: #ECFCF6;
  max-width: 18ch;
}

.page-about .about-hero__intro {
  max-width: 36rem;
  margin-top: 1.1rem;
  font-size: 1.0625rem;
  color: var(--text-light);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.6rem;
}

/* 坐标面板 */
.page-about .about-coord {
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: linear-gradient(158deg, rgba(11, 59, 50, .94), rgba(6, 42, 36, .70));
  box-shadow: var(--shadow-panel);
  padding: 1.05rem;
}

.page-about .about-coord__title {
  margin: 0;
  font-size: .75rem;
  letter-spacing: .22em;
  color: var(--cyan-mist);
}

.page-about .about-coord__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: .85rem;
  background: var(--line);
  border-radius: var(--r-xs);
  overflow: hidden;
}

.page-about .about-coord__item {
  background: rgba(6, 42, 36, .94);
  padding: .8rem .75rem;
}

.page-about .about-coord__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 4vw, 1.6rem);
  line-height: 1.1;
  color: var(--cyan);
  letter-spacing: .02em;
}

.page-about .about-coord__label {
  margin: .3rem 0 0;
  font-size: .8125rem;
  line-height: 1.5;
  color: var(--slate);
}

/* ---------- 章节头 ---------- */
.page-about .about-head {
  max-width: 44rem;
}

.page-about .about-head__text {
  margin-top: .9rem;
  color: var(--text-light);
  font-size: 1rem;
}

.page-about .eyebrow--ink {
  color: var(--ink-panel);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 1.75rem 0 0;
}

.page-about .about-figure .media-frame {
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  overflow: hidden;
  background: #072A24;
}

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

.page-about .about-figure--paper .media-frame {
  border-color: var(--line-dark);
  background: var(--paper-2);
}

.page-about .about-figure--paper .media-caption {
  color: var(--about-soft);
}

.page-about .media-caption {
  margin-top: .65rem;
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  position: relative;
  background:
    radial-gradient(70% 50% at 12% 0%, rgba(43, 245, 200, .10), transparent 60%),
    var(--ink);
}

.page-about .about-timeline__grid {
  display: grid;
  gap: 1.5rem;
  margin-top: clamp(2rem, 4vw, 3rem);
}

.page-about .about-axis__title {
  margin: 0;
  font-size: .75rem;
  letter-spacing: .22em;
  color: var(--slate);
}

.page-about .about-axis__list {
  display: flex;
  gap: .5rem;
  list-style: none;
  margin: .75rem 0 0;
  padding: 0 0 .4rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

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

.page-about .about-axis__list a {
  display: flex;
  align-items: center;
  gap: .45rem;
  padding: .45rem .8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text-light);
  text-decoration: none;
  font-size: .8125rem;
  white-space: nowrap;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-about .about-axis__list a:hover {
  border-color: var(--line-strong);
  color: var(--cyan-mist);
}

.page-about .about-axis__list .mono {
  color: var(--cyan);
  font-size: .8125rem;
}

.page-about .about-nodes {
  display: grid;
  gap: .9rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-node {
  border: 1px solid var(--line);
  border-left: 2px solid rgba(43, 245, 200, .45);
  border-radius: var(--r-sm);
  background: linear-gradient(150deg, rgba(11, 59, 50, .76), rgba(6, 42, 36, .52));
  padding: 1.1rem 1.15rem 1.2rem;
  scroll-margin-top: calc(var(--header-h) + 1.5rem);
}

.page-about .about-node--now {
  border-left-color: var(--amber);
  background: linear-gradient(150deg, rgba(11, 59, 50, .92), rgba(6, 42, 36, .62));
}

.page-about .about-node__year {
  margin: 0;
  font-size: .9375rem;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-node--now .about-node__year {
  color: var(--amber);
}

.page-about .about-node__meta {
  margin-left: .5rem;
  font-family: var(--font-body);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--slate);
}

.page-about .about-node__title {
  margin: .45rem 0 0;
  color: #E8FAF4;
}

.page-about .about-node__text {
  margin: .55rem 0 0;
  font-size: .9688rem;
  color: var(--text-light);
  max-width: 42rem;
}

/* ---------- 三级栏目 ---------- */
.page-about .about-columns {
  background:
    radial-gradient(64% 44% at 100% 0%, rgba(43, 245, 200, .10), transparent 62%),
    var(--paper);
}

.page-about .about-columns__head {
  max-width: 46rem;
}

.page-about .about-columns__lead {
  margin-top: .9rem;
  font-size: 1rem;
  color: #2A3F3A;
}

.page-about .about-columns__grid {
  display: grid;
  gap: 1.75rem;
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
}

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

.page-about .about-levels {
  display: grid;
  gap: .75rem;
  align-content: start;
}

.page-about .about-level {
  border: 1px solid var(--line-dark);
  border-radius: var(--r-sm);
  background: #fff;
  overflow: hidden;
}

.page-about .about-level > summary {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .9rem 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .9688rem;
  color: var(--ink-deep);
}

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

.page-about .about-level > summary::after {
  content: "+";
  margin-left: .35rem;
  font-family: var(--font-mono);
  color: var(--ink-panel);
}

.page-about .about-level[open] > summary::after {
  content: "−";
}

.page-about .about-level__tag {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .08em;
  padding: .18rem .45rem;
  border-radius: var(--r-xs);
  background: var(--paper-2);
  color: var(--ink-panel);
}

.page-about .about-level__tag--amber {
  background: rgba(255, 159, 28, .16);
  color: var(--amber-deep);
  box-shadow: inset 0 0 0 1px rgba(154, 77, 0, .28);
}

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

.page-about .about-level__count {
  margin-left: auto;
  font-size: .75rem;
  letter-spacing: .04em;
  color: var(--about-soft);
  white-space: nowrap;
}

.page-about .about-level[open] > summary {
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-level__body {
  padding: .85rem 1rem 1rem;
}

.page-about .about-level__body p {
  margin: 0;
  font-size: .9375rem;
  color: #2A3F3A;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background:
    radial-gradient(72% 56% at 88% 0%, rgba(43, 245, 200, .13), transparent 60%),
    linear-gradient(180deg, var(--ink) 0%, #082C26 100%);
}

.page-about .about-team__grid {
  display: grid;
  gap: 2rem;
}

.page-about .about-team__text p {
  margin-top: 1rem;
  font-size: 1rem;
  color: var(--text-light);
  max-width: 40rem;
}

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

.page-about .about-flow {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: .9rem;
}

.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  gap: .8rem;
  padding-top: .9rem;
  border-top: 1px solid var(--line);
}

.page-about .about-flow__num {
  font-size: .875rem;
  color: var(--cyan);
  letter-spacing: .06em;
  padding-top: .15rem;
}

.page-about .about-flow__step h3 {
  color: #E8FAF4;
}

.page-about .about-flow__step p {
  margin: .35rem 0 0;
  font-size: .9375rem;
  color: var(--text-light);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(2rem, 4vw, 3rem);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.page-about .about-stats__cell {
  background: rgba(6, 42, 36, .94);
  padding: 1rem .9rem 1.1rem;
}

.page-about .about-stats__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 4vw, 1.85rem);
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-stats__label {
  margin: .35rem 0 0;
  font-size: .8125rem;
  line-height: 1.5;
  color: var(--slate);
}

/* ---------- 版本焕新与服务范围 ---------- */
.page-about .about-scope {
  background:
    radial-gradient(56% 42% at 4% 100%, rgba(43, 245, 200, .09), transparent 62%),
    var(--ink);
}

.page-about .about-scope__grid {
  display: grid;
  gap: 2rem;
}

.page-about .about-scope__text p {
  margin-top: .9rem;
  font-size: 1rem;
  color: var(--text-light);
  max-width: 38rem;
}

.page-about .about-scope__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

.page-about .about-textlink {
  color: var(--cyan-mist);
  text-decoration: none;
  font-size: .9375rem;
  border-bottom: 1px solid rgba(155, 255, 233, .35);
  padding-bottom: 2px;
}

.page-about .about-textlink:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .about-tiers {
  display: grid;
  gap: .75rem;
  align-content: start;
}

.page-about .about-tier {
  display: grid;
  gap: .35rem;
  padding: .95rem 1rem;
  border: 1px solid var(--line);
  border-left: 2px solid var(--amber);
  border-radius: var(--r-sm);
  background: linear-gradient(150deg, rgba(11, 59, 50, .86), rgba(6, 42, 36, .58));
  text-decoration: none;
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .about-tier:hover {
  border-color: var(--line-strong);
  border-left-color: var(--amber);
  transform: translateY(-2px);
}

.page-about .about-tier__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: .04em;
  color: var(--amber);
}

.page-about .about-tier__desc {
  font-size: .875rem;
  line-height: 1.7;
  color: var(--text-light);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(2rem, 4vw, 3rem) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.page-about .about-figures li {
  background: rgba(6, 42, 36, .9);
  padding: .9rem .85rem;
  display: grid;
  gap: .25rem;
}

.page-about .about-figures .mono {
  font-size: 1.2rem;
  color: var(--cyan-mist);
}

.page-about .about-figures li > span:last-child {
  font-size: .8125rem;
  color: var(--slate);
  line-height: 1.5;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-honor {
  background: var(--ink);
  border-top: 1px solid var(--line);
}

.page-about .about-honor__lead {
  margin-top: .9rem;
  font-size: 1rem;
  color: var(--text-light);
}

.page-about .about-partners {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
}

.page-about .about-partners li {
  display: grid;
  gap: .4rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--line);
}

.page-about .about-partners li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-partners__role {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .9688rem;
  letter-spacing: .04em;
  color: var(--cyan-mist);
}

.page-about .about-partners p {
  margin: 0;
  font-size: .9375rem;
  color: var(--text-light);
}

.page-about .about-awards {
  display: grid;
  gap: .75rem;
  margin-top: 1.75rem;
}

.page-about .about-award {
  display: grid;
  gap: .3rem;
  padding: .95rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: rgba(11, 59, 50, .55);
}

.page-about .about-award__year {
  font-size: .875rem;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-award p {
  margin: 0;
  font-size: .9375rem;
  color: var(--text-light);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: 0 0 clamp(3rem, 7vw, 5rem);
  background: var(--ink);
}

.page-about .about-cta__inner {
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  background:
    radial-gradient(90% 130% at 100% 0%, rgba(43, 245, 200, .16), transparent 58%),
    linear-gradient(150deg, rgba(11, 59, 50, .92), rgba(6, 42, 36, .82));
  display: grid;
  gap: 1.5rem;
}

.page-about .about-cta__text p {
  margin: .7rem 0 0;
  font-size: 1rem;
  color: var(--text-light);
  max-width: 36rem;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .about-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-about .about-partners li {
    grid-template-columns: 12rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1.25rem;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-about .about-columns__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(1.75rem, 3.5vw, 3rem);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(2rem, 3.5vw, 3rem);
  }

  .page-about .about-scope__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: clamp(2rem, 4vw, 3.5rem);
    align-items: start;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-figures {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .about-timeline__grid {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3rem);
    align-items: start;
  }

  .page-about .about-axis {
    position: sticky;
    top: calc(var(--header-h) + 1.75rem);
  }

  .page-about .about-axis__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: .45rem;
  }

  .page-about .about-axis__list a {
    border-radius: var(--r-xs);
    border-left: 2px solid rgba(43, 245, 200, .38);
    padding: .5rem .7rem;
    width: 100%;
  }

  .page-about .about-nodes {
    gap: 1rem;
  }

  .page-about .about-node {
    padding: 1.25rem 1.4rem 1.35rem;
  }

  .page-about .about-node:nth-child(even) {
    margin-left: clamp(0rem, 3vw, 2.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tier,
  .page-about .about-axis__list a {
    transition: none;
  }

  .page-about .about-tier:hover {
    transform: none;
  }
}
<<<END>>>