.page-about {
  --about-idx-w: 188px;
  position: relative;
  color: var(--text);
  background-color: var(--ink-900);
  background-image: repeating-linear-gradient(8deg, rgba(30, 59, 49, 0) 0 44px, rgba(30, 59, 49, 0.5) 44px 45px);
  padding: 0 clamp(16px, 4vw, 56px) clamp(56px, 8vw, 96px);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  max-width: var(--shell-max);
  margin: 20px auto 0;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: clamp(36px, 7vw, 92px) 0 clamp(22px, 3.5vw, 44px);
  display: grid;
  gap: clamp(16px, 2.2vw, 26px);
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 7.4vw, 84px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  max-width: 18em;
}

.page-about .about-hero__accent {
  color: var(--lime);
  text-shadow: 0 0 32px rgba(198, 255, 61, 0.3);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.78;
  color: var(--text);
}

.page-about .about-figures {
  list-style: none;
  margin: clamp(8px, 1.6vw, 18px) 0 0;
  padding: clamp(22px, 3vw, 34px) 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: clamp(18px, 3vw, 40px);
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.page-about .about-figure {
  display: grid;
  gap: 8px;
}

.page-about .about-figure__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: clamp(44px, 6.6vw, 82px);
  line-height: 0.95;
  color: var(--lime);
  text-shadow: 0 0 26px rgba(198, 255, 61, 0.26);
}

.page-about .about-figure__label {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ---------- 主体两栏 ---------- */

.page-about .about-layout {
  max-width: var(--shell-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 40px);
}

@media (min-width: 900px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-idx-w) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }
}

/* ---------- 左侧年份索引 ---------- */

.page-about .about-index {
  align-self: start;
  position: sticky;
  top: calc(var(--strip-h) + 10px);
  z-index: 6;
  padding: 10px 0;
  background: linear-gradient(180deg, rgba(6, 20, 15, 0.96) 0%, rgba(6, 20, 15, 0.86) 100%);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-index ol {
  list-style: none;
  margin: 0;
  padding: 0 2px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-index ol::-webkit-scrollbar {
  display: none;
}

.page-about .about-index a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(18, 48, 39, 0.6);
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--text);
  background: rgba(30, 75, 60, 0.9);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--amber);
}

.page-about .about-index a[aria-current="page"],
.page-about .about-index a.is-active {
  background: var(--amber);
  color: var(--ink-900);
}

.page-about .about-index a[aria-current="page"] .about-index__num,
.page-about .about-index a.is-active .about-index__num {
  color: var(--ink-900);
}

@media (min-width: 900px) {
  .page-about .about-index {
    background: transparent;
    backdrop-filter: none;
    border-bottom: 0;
    border-left: 1px solid var(--line);
    padding: 4px 0;
  }

  .page-about .about-index ol {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-index a {
    border-radius: 0 8px 8px 0;
    border-left: 2px solid transparent;
    background: transparent;
    justify-content: flex-start;
    padding-left: 16px;
  }

  .page-about .about-index a:hover,
  .page-about .about-index a:focus-visible {
    background: rgba(18, 48, 39, 0.62);
  }

  .page-about .about-index a[aria-current="page"],
  .page-about .about-index a.is-active {
    background: rgba(18, 48, 39, 0.5);
    border-left-color: var(--amber);
    color: var(--amber);
  }

  .page-about .about-index a[aria-current="page"] .about-index__num,
  .page-about .about-index a.is-active .about-index__num {
    color: var(--amber);
  }
}

/* ---------- 章节骨架 ---------- */

.page-about .about-body > .about-sec {
  border-top: 1px solid var(--line);
  padding: clamp(34px, 5.4vw, 68px) 0;
}

.page-about .about-body > .about-sec:first-child {
  border-top: 0;
  padding-top: clamp(18px, 3vw, 32px);
}

.page-about .about-head {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(27px, 4.2vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.page-about .about-lede {
  margin: 0 0 clamp(18px, 2.6vw, 28px);
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-note {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-note a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, 0.4);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-note a:hover {
  color: var(--rose);
  border-bottom-color: var(--rose);
}

/* ---------- 沿革时间线 ---------- */

.page-about .about-timeline {
  display: grid;
}

.page-about .about-node {
  display: grid;
  gap: 6px;
  padding: clamp(20px, 2.8vw, 28px) 0;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-node__era {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--amber);
}

.page-about .about-node h3 {
  margin: 0 0 8px;
  font-size: clamp(19px, 2.3vw, 24px);
  font-weight: 800;
  line-height: 1.3;
}

.page-about .about-node p {
  margin: 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

@media (min-width: 720px) {
  .page-about .about-node {
    grid-template-columns: 152px minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .about-node__era {
    padding-top: 4px;
  }
}

/* ---------- 整幅横向图 ---------- */

.page-about .about-banner {
  position: relative;
  margin: clamp(28px, 4.4vw, 54px) 0 0;
  overflow: hidden;
  border-radius: 4px;
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.06);
}

.page-about .about-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 20, 15, 0.3) 0%, rgba(6, 20, 15, 0.92) 100%);
  pointer-events: none;
}

.page-about .about-banner figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: clamp(18px, 3.4vw, 40px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.9vw, 32px);
  line-height: 1.28;
  letter-spacing: -0.01em;
}

/* ---------- 三条工作线 ---------- */

.page-about .about-lines {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-line {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 3vw, 34px);
  padding: clamp(20px, 2.8vw, 30px) 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-line__idx {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 4.6vw, 52px);
  line-height: 1;
  color: rgba(61, 224, 208, 0.22);
  -webkit-text-stroke: 1px var(--cyan);
}

.page-about .about-line h3 {
  margin: 0 0 8px;
  font-size: clamp(19px, 2.4vw, 25px);
  font-weight: 800;
  line-height: 1.28;
}

.page-about .about-line p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 复核节奏 ---------- */

.page-about .about-checks {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-check {
  display: grid;
  grid-template-columns: minmax(84px, 118px) minmax(0, 1fr);
  gap: clamp(14px, 2.6vw, 30px);
  align-items: baseline;
  padding: clamp(16px, 2.4vw, 24px) 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-check__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1;
  color: var(--lime);
  text-shadow: 0 0 24px rgba(198, 255, 61, 0.28);
}

.page-about .about-check__num em {
  font-style: normal;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-left: 5px;
  text-shadow: none;
}

.page-about .about-check__text {
  display: block;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-check__text strong {
  display: block;
  color: var(--text);
  font-weight: 700;
  margin-bottom: 3px;
}

/* ---------- 可展开流程 ---------- */

.page-about .about-details {
  margin-top: clamp(24px, 3.4vw, 38px);
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(18, 48, 39, 0.42);
  backdrop-filter: blur(6px);
}

.page-about .about-details summary {
  list-style: none;
  cursor: pointer;
  min-height: 54px;
  padding: 15px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}

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

.page-about .about-details summary:hover,
.page-about .about-details summary:focus-visible {
  color: var(--rose);
}

.page-about .about-details summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--lime);
  flex: none;
}

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

.page-about .about-details__body {
  padding: 4px 20px 24px;
  border-top: 1px solid var(--line);
}

.page-about .about-steps {
  list-style: none;
  counter-reset: step;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .about-steps li {
  counter-increment: step;
  position: relative;
  padding: 0 0 20px 42px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

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

.page-about .about-steps li strong {
  display: block;
  color: var(--text);
  font-weight: 700;
  margin-bottom: 2px;
}

.page-about .about-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 2px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  color: var(--amber);
}

.page-about .about-steps li::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 20px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-about .about-steps li:last-child::after {
  display: none;
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
}

@media (min-width: 820px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    align-items: start;
  }
}

.page-about .about-team__lede {
  margin: 0 0 clamp(18px, 2.6vw, 28px);
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-team__media {
  margin: 0;
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 4px;
  filter: saturate(0.82) contrast(1.05) brightness(0.92);
}

.page-about .about-bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-bar {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) 40px;
  align-items: center;
  gap: 12px;
  font-size: 14px;
}

.page-about .about-bar__role {
  color: var(--muted);
  letter-spacing: 0.04em;
}

.page-about .about-bar__track {
  position: relative;
  height: 14px;
  border-radius: 2px;
  background: rgba(18, 48, 39, 0.85);
  border: 1px solid var(--line);
}

.page-about .about-bar__fill {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--lime));
  transition: filter var(--dur) var(--ease);
}

.page-about .about-bar__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  color: var(--text);
  text-align: right;
}

.page-about .about-bar--edit .about-bar__fill {
  width: 42.9%;
}

.page-about .about-bar--tech .about-bar__fill {
  width: 28.6%;
  background: linear-gradient(90deg, var(--cyan), #7ff0e3);
}

.page-about .about-bar--ops .about-bar__fill {
  width: 19%;
  background: linear-gradient(90deg, var(--amber), #ffd79a);
}

.page-about .about-bar--other .about-bar__fill {
  width: 9.5%;
  background: linear-gradient(90deg, #6f8479, #a9beb4);
}

.page-about .about-bar__note {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 0;
  z-index: 4;
  width: max-content;
  max-width: min(280px, 68vw);
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--ink-700);
  color: var(--text);
  font-size: 12.5px;
  line-height: 1.6;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur) var(--ease);
}

.page-about .about-bar:hover .about-bar__note,
.page-about .about-bar:focus-within .about-bar__note {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.page-about .about-bar:hover .about-bar__fill {
  filter: brightness(1.18);
}

/* ---------- 交手纪录字段 ---------- */

.page-about .about-h2h {
  margin: 0;
  display: grid;
}

.page-about .about-h2h__row {
  display: grid;
  gap: 8px;
  padding: clamp(16px, 2.4vw, 24px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-h2h__row:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-h2h dt {
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-h2h dd {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

@media (min-width: 720px) {
  .page-about .about-h2h__row {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 32px;
    align-items: baseline;
  }
}

/* ---------- 协作生态 ---------- */

.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-fact {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 3vw, 34px);
  padding: clamp(18px, 2.6vw, 28px) 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-fact__n {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1;
  color: var(--amber);
  min-width: 2.4em;
}

.page-about .about-fact__body h3 {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 800;
  line-height: 1.3;
}

.page-about .about-fact__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 地域与备案 ---------- */

.page-about .about-strip {
  margin: 0 0 clamp(20px, 3vw, 32px);
  overflow: hidden;
  border-radius: 4px;
}

.page-about .about-strip img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.05) brightness(0.88);
}

@media (min-width: 720px) {
  .page-about .about-strip img {
    aspect-ratio: 21 / 9;
  }
}

.page-about .about-legal {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-legal li {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 700px) {
  .page-about .about-legal li {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 28px;
    align-items: baseline;
  }
}

.page-about .about-legal__key {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .about-legal__val {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
}

.page-about .about-legal__val a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, 0.4);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-legal__val a:hover {
  color: var(--rose);
  border-bottom-color: var(--rose);
}

/* ---------- 结尾入口 ---------- */

.page-about .about-cta__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-cta__links li {
  border-top: 1px solid var(--line);
}

.page-about .about-cta__links li:first-child {
  border-top: 0;
}

.page-about .about-cta__links a {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 28px);
  min-height: 60px;
  padding: clamp(14px, 2vw, 20px) 0;
  color: var(--text);
  text-decoration: none;
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 600;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-cta__links a:hover,
.page-about .about-cta__links a:focus-visible {
  color: var(--lime);
  transform: translateX(4px);
}

.page-about .about-cta__idx {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber);
  flex: none;
}

.page-about .about-cta__txt {
  display: block;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cta__links a,
  .page-about .about-bar__fill,
  .page-about .about-bar__note,
  .page-about .about-index a {
    transition: none;
  }

  .page-about .about-cta__links a:hover,
  .page-about .about-cta__links a:focus-visible {
    transform: none;
  }
}
<<<END>>>