.page-about {
  --about-rule: rgba(28, 64, 93, 0.85);
  --about-panel: rgba(17, 43, 66, 0.72);
  --about-glow: rgba(242, 107, 43, 0.16);
  --about-celadon-soft: rgba(79, 175, 158, 0.12);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: clamp(18px, 3vw, 40px);
  padding-bottom: clamp(32px, 5vw, 68px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -26%;
  right: -12%;
  width: min(620px, 92vw);
  height: min(620px, 92vw);
  background: radial-gradient(circle, var(--about-glow), transparent 66%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(22px, 3.2vw, 40px);
  margin-top: clamp(18px, 3vw, 32px);
}

.page-about .about-hero__main .plate {
  display: inline-block;
}

.page-about .about-hero h1 {
  margin: 0.12em 0 0.1em;
  font-size: clamp(46px, 11vw, 96px);
  line-height: 0.92;
  letter-spacing: -0.02em;
  color: var(--paper);
  font-weight: 900;
}

.page-about .about-hero__kicker {
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--brass);
  text-transform: uppercase;
}

.page-about .about-hero__lead {
  max-width: 46ch;
  margin: 0;
  font-size: clamp(15px, 1.55vw, 18px);
  line-height: 1.9;
  color: var(--warm);
}

.page-about .about-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--about-rule);
  background: var(--ink-800);
  overflow: hidden;
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(244, 239, 228, 0.06) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, rgba(244, 239, 228, 0.05) 0 1px, transparent 1px 72px);
  pointer-events: none;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  filter: saturate(0.7) contrast(1.06);
  opacity: 0.94;
}

.page-about .about-hero__ribbon {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  writing-mode: vertical-rl;
  padding: 16px 7px;
  background: var(--brass);
  color: var(--ink-950);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
}

.page-about .about-hero__cap {
  position: relative;
  z-index: 2;
  display: block;
  padding: 10px 16px;
  border-top: 1px solid var(--about-rule);
  background: rgba(5, 13, 21, 0.72);
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 主体外壳 ---------- */
.page-about .about-shell {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  align-items: start;
  padding-bottom: clamp(44px, 6vw, 88px);
}

.page-about .about-toc {
  border: 1px solid var(--about-rule);
  background: linear-gradient(180deg, var(--about-panel), rgba(10, 25, 41, 0.62));
  padding: 12px 14px;
}

.page-about .about-toc__title {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--slate);
}

.page-about .about-toc__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-toc__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 11px;
  border: 1px solid transparent;
  white-space: nowrap;
  font-size: 13px;
  color: var(--warm);
  text-decoration: none;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .about-toc__list a .mono {
  font-size: 11px;
  color: var(--celadon);
  letter-spacing: 0.1em;
}

.page-about .about-toc__list a:hover,
.page-about .about-toc__list a:focus-visible {
  border-color: var(--orange);
  color: var(--paper);
  background: rgba(242, 107, 43, 0.12);
  outline: none;
}

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

/* ---------- 章节骨架 ---------- */
.page-about .about-block {
  border-top: 1px solid var(--about-rule);
  padding-top: clamp(20px, 3vw, 34px);
  margin-top: clamp(30px, 4.4vw, 56px);
}

.page-about .about-block:first-child {
  margin-top: 0;
  border-top: none;
  padding-top: 0;
}

.page-about .about-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-about .about-block__no {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .about-block h2 {
  margin: 0;
  max-width: 24ch;
  font-size: clamp(23px, 3.4vw, 40px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper);
  font-weight: 900;
}

.page-about .about-copy p,
.page-about .about-copy__p {
  margin: 0 0 14px;
  font-size: clamp(15px, 1.45vw, 17px);
  line-height: 1.92;
  color: var(--warm);
  opacity: 0.88;
  max-width: 62ch;
}

.page-about .about-copy__p--wide {
  max-width: 72ch;
}

.page-about .about-inline {
  color: var(--celadon);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.page-about .about-inline:hover,
.page-about .about-inline:focus-visible {
  color: var(--orange-lift);
  outline: none;
}

/* ---------- 起点与定位 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(18px, 3vw, 30px);
}

.page-about .fact-panel {
  display: grid;
  gap: 1px;
  align-self: start;
  border: 1px solid var(--about-rule);
  background: var(--about-rule);
}

.page-about .fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  background: var(--ink-800);
}

.page-about .fact__num {
  font-family: var(--mono);
  font-size: clamp(26px, 3.6vw, 36px);
  font-weight: 600;
  line-height: 1;
  color: var(--celadon);
}

.page-about .fact__label {
  font-size: 13px;
  color: var(--slate);
  text-align: right;
}

/* ---------- 时间轴 ---------- */
.page-about .tl {
  display: flex;
  gap: 14px;
  padding: 6px 2px 18px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.page-about .tl:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 4px;
}

.page-about .tl__item {
  position: relative;
  flex: 0 0 258px;
  scroll-snap-align: start;
  padding: 16px 18px 20px;
  border: 1px solid var(--about-rule);
  background: linear-gradient(180deg, var(--about-panel), rgba(10, 25, 41, 0.82));
  transition: transform 220ms var(--ease), border-color 220ms var(--ease), background 220ms var(--ease);
}

.page-about .tl__item:hover,
.page-about .tl__item:focus-within {
  transform: translateY(-4px);
  border-color: var(--orange);
  background: linear-gradient(180deg, rgba(28, 64, 93, 0.9), rgba(10, 25, 41, 0.9));
}

.page-about .tl__item--now {
  border-color: rgba(201, 164, 92, 0.7);
  background: linear-gradient(180deg, rgba(201, 164, 92, 0.14), rgba(10, 25, 41, 0.9));
}

.page-about .tl__mark {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.page-about .tl__year {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .tl__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 4px var(--about-celadon-soft);
}

.page-about .tl__item--now .tl__dot {
  background: var(--orange-lift);
  box-shadow: 0 0 0 4px rgba(255, 139, 74, 0.2);
}

.page-about .tl__ver {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 11px;
}

.page-about .tl__title {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--paper);
}

.page-about .tl__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .tl__item:hover .tl__desc,
.page-about .tl__item:focus-within .tl__desc {
  color: var(--warm);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
}

.page-about .team-figure,
.page-about .cover-figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--about-rule);
  background: var(--ink-800);
}

.page-about .team-figure img,
.page-about .cover-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.05);
}

.page-about .team-figure img {
  aspect-ratio: 10 / 7;
}

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

.page-about .team-figure__cap,
.page-about .cover-figure__cap {
  display: block;
  padding: 9px 14px;
  border-top: 1px solid var(--about-rule);
  background: rgba(5, 13, 21, 0.66);
  font-size: 12px;
  line-height: 1.65;
  color: var(--slate);
}

.page-about .team-body {
  min-width: 0;
}

.page-about .team-roles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
  gap: 10px;
  margin: 18px 0 20px;
  padding: 0;
  list-style: none;
}

.page-about .role {
  padding: 12px 12px 14px;
  border-left: 2px solid var(--celadon-deep);
  background: var(--about-celadon-soft);
}

.page-about .role__num {
  display: block;
  font-family: var(--mono);
  font-size: 28px;
  font-weight: 600;
  line-height: 1;
  color: var(--celadon);
}

.page-about .role__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--warm);
}

.page-about .steps {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .step {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid var(--about-rule);
  background: rgba(17, 43, 66, 0.5);
}

.page-about .step__no {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--brass);
  padding-top: 2px;
}

.page-about .step__title {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .step__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .team-note {
  margin: 18px 0 0;
  padding: 12px 14px;
  border-left: 2px solid var(--orange);
  background: linear-gradient(90deg, rgba(242, 107, 43, 0.12), transparent);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--warm);
}

/* ---------- 省区覆盖 ---------- */
.page-about .cover-grid {
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-about .matrix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 10px;
  align-content: start;
}

.page-about .region {
  padding: 12px 13px 14px;
  border: 1px solid var(--about-rule);
  background: rgba(10, 25, 41, 0.62);
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .region:hover {
  border-color: var(--celadon);
  background: var(--about-celadon-soft);
}

.page-about .region__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.page-about .region__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .region__count {
  font-size: 13px;
  color: var(--celadon);
}

.page-about .dots {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.page-about .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--celadon-deep);
  box-shadow: inset 0 0 0 1px rgba(79, 175, 158, 0.55);
}

.page-about .diffs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .diff {
  padding: 12px 16px;
  border-left: 2px solid var(--orange);
  background: linear-gradient(90deg, rgba(242, 107, 43, 0.1), transparent);
}

.page-about .diff__k {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--orange-lift);
}

.page-about .diff__v {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm);
}

/* ---------- 伙伴与场景 ---------- */
.page-about .scenes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(178px, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .scene {
  position: relative;
  padding: 16px 16px 18px;
  border: 1px solid var(--about-rule);
  background: linear-gradient(180deg, rgba(17, 43, 66, 0.66), rgba(10, 25, 41, 0.5));
  transition: border-color 220ms var(--ease), transform 220ms var(--ease);
}

.page-about .scene::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 16px;
  width: 26px;
  height: 2px;
  background: var(--brass);
}

.page-about .scene:hover {
  border-color: var(--brass);
  transform: translateY(-3px);
}

.page-about .scene__k {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--brass);
}

.page-about .scene__title {
  margin: 10px 0 6px;
  font-size: 16px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--paper);
}

.page-about .scene__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 获得协助 ---------- */
.page-about .about-block--last {
  padding-bottom: 0;
}

.page-about .support {
  position: relative;
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid var(--about-rule);
  background: linear-gradient(150deg, rgba(28, 64, 93, 0.72), rgba(10, 25, 41, 0.9));
  overflow: hidden;
}

.page-about .support::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(79, 175, 158, 0.24), transparent 70%);
  pointer-events: none;
}

.page-about .support__lead {
  position: relative;
  margin: 0 0 22px;
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.9;
  color: var(--warm);
}

.page-about .contact-grid {
  position: relative;
  display: grid;
  gap: 10px;
}

.page-about .copy-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 12px 14px;
  border: 1px solid var(--about-rule);
  background: rgba(5, 13, 21, 0.5);
}

.page-about .copy-line__key {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate);
}

.page-about .copy-line__val {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 14.5px;
  color: var(--paper);
  word-break: break-all;
}

.page-about .copy-line__hint {
  flex: 0 0 auto;
  padding: 5px 12px;
  border: 1px solid var(--celadon-deep);
  background: transparent;
  color: var(--celadon);
  font-family: var(--sans);
  font-size: 12px;
  cursor: pointer;
  transition: background 200ms var(--ease), color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .copy-line__hint:hover,
.page-about .copy-line__hint:focus-visible {
  border-color: var(--orange);
  background: rgba(242, 107, 43, 0.14);
  color: var(--paper);
  outline: none;
}

.page-about .support__row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 12px 14px;
  border: 1px solid var(--about-rule);
  background: rgba(5, 13, 21, 0.32);
}

.page-about .support__key {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate);
}

.page-about .support__val {
  flex: 1 1 220px;
  min-width: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--warm);
}

.page-about .support__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.55fr);
  }

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

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: end;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .page-about .cover-grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-about .about-shell {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-about .about-toc {
    position: sticky;
    top: 112px;
    padding: 16px;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    gap: 2px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .about-toc__list a {
    padding: 9px 10px;
    border-left: 2px solid var(--about-rule);
    white-space: normal;
  }

  .page-about .about-toc__list a:hover,
  .page-about .about-toc__list a:focus-visible {
    border-left-color: var(--orange);
  }

  .page-about .about-copy__p--wide {
    max-width: 74ch;
  }
}

@media (min-width: 1320px) {
  .page-about .about-hero__figure {
    margin-left: clamp(0px, 2vw, 24px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__item,
  .page-about .scene,
  .page-about .region,
  .page-about .about-toc__list a,
  .page-about .copy-line__hint {
    transition: none;
  }

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

18. 所有内容按此执行，不得新增其他标记。