.page-about {
  --about-accent: var(--lime);
  --about-glow: rgba(199, 255, 60, 0.35);
  padding-bottom: 72px;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: 18px;
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 20px 0 36px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -40px -10% 0 -10%;
  background-image:
    linear-gradient(rgba(42, 49, 56, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 49, 56, 0.55) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse 70% 90% at 78% 0%, #000 5%, transparent 72%);
  mask-image: radial-gradient(ellipse 70% 90% at 78% 0%, #000 5%, transparent 72%);
  pointer-events: none;
}

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

.page-about .about-hero__kicker {
  color: var(--pulse);
  margin: 0;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(34px, 7vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--mist);
  margin: 14px 0 18px;
}

.page-about .about-hero__lead {
  max-width: 620px;
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-hero__meta {
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  background: var(--char);
  padding: 14px 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-stat .index {
  color: var(--silver);
}

.page-about .about-stat__v {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 24px;
  line-height: 1;
  color: var(--lime);
  letter-spacing: -0.01em;
}

@media (min-width: 720px) {
  .page-about .about-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 主体骨架 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 8px;
}

@media (min-width: 960px) {
  .page-about .about-shell {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }
}

/* ---------- 左侧档案索引 ---------- */
.page-about .about-index {
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.page-about .about-index__head {
  color: var(--silver);
  margin: 0 0 10px;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 5px 8px;
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--silver);
  text-decoration: none;
  transition: color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--mist);
  background: rgba(199, 255, 60, 0.07);
}

.page-about .about-index__list .num {
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--lime);
}

@media (min-width: 960px) {
  .page-about .about-index {
    position: sticky;
    top: 26px;
    border-top: none;
    border-left: 1px solid var(--line);
    padding: 2px 0 2px 14px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 0;
  }

  .page-about .about-index__list a {
    padding: 7px 8px;
  }
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding: 30px 0 34px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 76px;
}

.page-about .about-body > .about-sec:first-child {
  border-top: none;
  padding-top: 6px;
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
}

.page-about .about-sec__no {
  flex: none;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--lime);
  border: 1px solid var(--about-glow);
  border-radius: 999px;
  padding: 3px 9px;
  line-height: 1.4;
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.2;
  color: var(--mist);
  transition: color 200ms var(--ease);
}

.page-about .about-sec:target .about-sec__title {
  color: var(--lime);
}

.page-about .about-sec > p {
  max-width: 62ch;
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--silver);
}

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

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 20px;
  background: var(--char);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-figure--tight {
  margin-top: 26px;
  margin-bottom: 0;
}

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

.page-about .about-figure figcaption {
  padding: 9px 12px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--silver);
}

/* ---------- A-02 覆盖地图 ---------- */
.page-about .about-coverage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin: 20px 0 24px;
}

.page-about .about-coverage__vis {
  background: var(--char);
  border: 1px solid var(--line);
  padding: 14px;
}

.page-about .about-coverage__vis svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .cov-cell {
  fill: rgba(199, 255, 60, 0.09);
  stroke: rgba(199, 255, 60, 0.22);
  stroke-width: 1;
}

.page-about .cov-cell--mid {
  fill: rgba(199, 255, 60, 0.22);
  stroke: rgba(199, 255, 60, 0.45);
}

.page-about .cov-cell--high {
  fill: rgba(199, 255, 60, 0.42);
  stroke: rgba(199, 255, 60, 0.72);
}

.page-about .about-coverage__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-coverage__legend li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .legend-dot {
  flex: none;
  width: 12px;
  height: 12px;
  margin-top: 5px;
  border-radius: 2px;
  background: rgba(199, 255, 60, 0.12);
  border: 1px solid rgba(199, 255, 60, 0.3);
}

.page-about .legend-dot--mid {
  background: rgba(199, 255, 60, 0.24);
  border-color: rgba(199, 255, 60, 0.5);
}

.page-about .legend-dot--high {
  background: rgba(199, 255, 60, 0.45);
  border-color: rgba(199, 255, 60, 0.75);
}

@media (min-width: 860px) {
  .page-about .about-coverage {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 22px;
    align-items: center;
  }
}

/* ---------- 四条内容线 ---------- */
.page-about .about-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-line {
  background: var(--char);
  padding: 18px 16px 20px;
  border-left: 2px solid transparent;
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}

.page-about .about-line:hover {
  border-left-color: var(--lime);
}

.page-about .about-line__k {
  margin: 0;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--pulse);
}

.page-about .about-line__t {
  margin: 7px 0 8px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 21px;
  line-height: 1.25;
  color: var(--mist);
}

.page-about .about-line__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--silver);
}

@media (min-width: 700px) {
  .page-about .about-lines {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- A-03 团队 ---------- */
.page-about .about-crew {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 20px;
}

.page-about .about-crew__item {
  position: relative;
  background: var(--char);
  border: 1px solid var(--line);
  padding: 18px 16px 20px;
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}

.page-about .about-crew__item:hover {
  border-color: var(--about-glow);
  transform: translateY(-2px);
}

.page-about .about-crew__k {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .about-crew__t {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 20px;
  color: var(--mist);
}

.page-about .about-crew__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--silver);
}

@media (min-width: 760px) {
  .page-about .about-crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- A-04 数据核对 ---------- */
.page-about .about-check {
  list-style: none;
  margin: 20px 0 22px;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-check li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0 18px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-check__no {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--lime);
  padding-top: 3px;
}

.page-about .about-check__t {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 18px;
  color: var(--mist);
}

.page-about .about-check__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--silver);
  max-width: 58ch;
}

/* ---------- A-05 更新节奏 ---------- */
.page-about .about-cadence {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 20px;
}

.page-about .about-cadence__col {
  background: var(--char);
  padding: 20px 18px 22px;
}

.page-about .about-cadence__col--live {
  box-shadow: inset 3px 0 0 var(--lime);
}

.page-about .about-cadence__col--quiet {
  box-shadow: inset 3px 0 0 var(--orange);
}

.page-about .about-cadence__k {
  margin: 0;
  color: var(--silver);
}

.page-about .about-cadence__t {
  margin: 9px 0 14px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 22px;
  line-height: 1.24;
  color: var(--mist);
}

.page-about .about-cadence__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-cadence__col li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--silver);
}

.page-about .about-cadence__col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 1px;
  background: currentColor;
  opacity: 0.6;
}

@media (min-width: 760px) {
  .page-about .about-cadence {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- A-06 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  counter-reset: tl;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 26px 34px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(199, 255, 60, 0.12);
}

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 22px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 4px;
}

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

.page-about .about-timeline__no {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--pulse);
  display: block;
}

.page-about .about-timeline__stage {
  margin: 5px 0 6px;
  color: var(--silver);
}

.page-about .about-timeline__t {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 19px;
  line-height: 1.3;
  color: var(--mist);
}

.page-about .about-timeline__d {
  margin: 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--silver);
}

/* ---------- A-07 联系 ---------- */
.page-about .about-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin: 18px 0 16px;
}

.page-about .about-contact__row {
  background: var(--char);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-contact__k {
  color: var(--silver);
  margin: 0;
}

.page-about .about-contact__v {
  font-size: 15px;
  color: var(--lime);
  word-break: break-all;
}

.page-about .about-contact__v--text {
  font-family: var(--font-body);
  color: var(--mist);
  word-break: normal;
}

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

.page-about .about-contact__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px !important;
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-line,
  .page-about .about-crew__item,
  .page-about .about-sec__title {
    transition: none;
  }

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