.page-about {
  --about-body: rgba(243, 245, 255, 0.76);
  --about-body-strong: #F3F5FF;
  --about-rail-w: 88px;
  display: block;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: 34px 0 8px;
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(43, 240, 208, 0.10), transparent 58%),
    linear-gradient(180deg, #0B1030 0%, rgba(11, 16, 48, 0.4) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: repeating-linear-gradient(90deg, rgba(154, 164, 200, 0.34) 0 1px, transparent 1px 26px);
  pointer-events: none;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 26px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: end;
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 68px);
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--white);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-hero__side {
  padding: 18px 20px;
  border-left: 2px solid var(--path);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  background: linear-gradient(120deg, rgba(21, 28, 74, 0.9), rgba(21, 28, 74, 0.28));
}

.page-about .about-hero__side-label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--haze);
}

.page-about .about-hero__side-num {
  margin: 6px 0 4px;
  font-size: 52px;
  line-height: 1;
  font-weight: 700;
  color: var(--path);
  letter-spacing: -0.02em;
}

.page-about .about-hero__side-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-body);
}

.page-about .about-figures {
  list-style: none;
  margin: 38px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
}

.page-about .about-figures__n {
  display: block;
  font-size: 28px;
  line-height: 1.1;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.01em;
}

.page-about .about-figures__t {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--haze);
}

/* ---------- 主体：左侧索引 + 右侧正文 ---------- */

.page-about .about-layout {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 32px 20px 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-about .about-rail {
  align-self: start;
}

.page-about .about-rail__cap {
  display: none;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

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

.page-about .about-rail__link {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.25s ease, color 0.25s ease;
}

.page-about .about-rail__yr {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--about-body-strong);
  letter-spacing: 0.02em;
}

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

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  border-color: var(--path);
}

.page-about .about-rail__link.is-active .about-rail__yr,
.page-about .about-rail__link.is-current .about-rail__yr {
  color: var(--path);
}

.page-about .about-rail__link.is-active,
.page-about .about-rail__link.is-current {
  border-color: var(--path);
}

/* ---------- 编年章节 ---------- */

.page-about .about-chapter {
  padding-bottom: 34px;
  margin-bottom: 34px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-chapter:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 12px;
}

.page-about .about-chapter__head {
  margin-bottom: 16px;
}

.page-about .about-chapter__yr {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--path);
}

.page-about .about-chapter__yr--key {
  color: var(--announce);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 5.2vw, 34px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-chapter__body p {
  max-width: 40em;
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-body);
}

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

.page-about .about-chapter__foot {
  max-width: 40em;
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
}

.page-about .about-chapter__foot a {
  color: var(--path);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 通栏主题带 ---------- */

.page-about .about-band {
  margin: 0 0 34px;
  padding: 20px 22px;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(43, 240, 208, 0.28);
  background:
    linear-gradient(100deg, rgba(21, 28, 74, 0.92) 0%, rgba(11, 16, 48, 0.35) 100%);
  display: grid;
  gap: 10px;
}

.page-about .about-band__tag {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--announce);
}

.page-about .about-band__text {
  margin: 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- 团队角色 ---------- */

.page-about .about-figure {
  margin: 24px 0 22px;
}

.page-about .about-figure .figure__frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--panel);
}

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

.page-about .about-figure .figure__cap {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--haze);
}

.page-about .about-roles {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  border-left: 1px solid var(--line);
}

.page-about .about-role {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  grid-template-areas:
    "n t"
    "n d";
  column-gap: 14px;
  row-gap: 4px;
  padding: 14px 0 14px 16px;
  position: relative;
}

.page-about .about-role::before {
  content: "";
  position: absolute;
  left: -3px;
  top: 22px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--node);
}

.page-about .about-role__n {
  grid-area: n;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--path);
}

.page-about .about-role__t {
  grid-area: t;
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-role__d {
  grid-area: d;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-body);
}

/* ---------- 覆盖与规模 ---------- */

.page-about .about-figure--map .figure__frame {
  background: linear-gradient(140deg, rgba(21, 28, 74, 0.95), rgba(11, 16, 48, 0.7));
}

.page-about .about-reach {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 22px;
}

.page-about .about-reach__list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  align-content: start;
}

.page-about .about-reach__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--line-strong);
}

.page-about .about-reach__row:first-child {
  border-top: 1px dashed var(--line-strong);
}

.page-about .about-reach__row dt {
  font-size: 14px;
  color: var(--haze);
}

.page-about .about-reach__row dd {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.01em;
}

.page-about .about-reach__u {
  margin-left: 3px;
  font-size: 12px;
  font-weight: 500;
  color: var(--haze);
}

/* ---------- 站点信息表 ---------- */

.page-about .about-facts {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-about .about-facts li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-facts__k {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--haze);
}

.page-about .about-facts__v {
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-body-strong);
  word-break: break-word;
}

/* ---------- 年度摘要折叠 ---------- */

.page-about .about-details {
  margin-top: 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: rgba(21, 28, 74, 0.55);
  overflow: hidden;
}

.page-about .about-details > summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 18px;
  font-size: 15px;
  font-weight: 700;
  color: var(--path);
  position: relative;
}

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

.page-about .about-details > summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--path);
}

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

.page-about .about-list {
  list-style: none;
  margin: 0;
  padding: 0 18px 18px;
  display: grid;
  gap: 0;
}

.page-about .about-list li {
  position: relative;
  padding: 11px 0 11px 18px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--about-body);
  border-top: 1px dashed var(--line-strong);
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 19px;
  width: 7px;
  height: 2px;
  background: var(--announce);
}

/* ---------- 结尾动作 ---------- */

.page-about .about-next {
  margin-top: 12px;
  padding: 44px 0 52px;
  background:
    radial-gradient(80% 140% at 0% 100%, rgba(108, 123, 255, 0.14), transparent 60%),
    linear-gradient(180deg, rgba(11, 16, 48, 0.2), rgba(21, 28, 74, 0.55));
  border-top: 1px solid var(--line-strong);
}

.page-about .about-next__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 5vw, 32px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--white);
  max-width: 22em;
}

.page-about .about-next__text {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-next__acts {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-top {
  display: block;
  width: max-content;
  margin: 0 auto 40px;
  padding: 10px 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--haze);
  text-decoration: none;
}

.page-about .about-top:hover,
.page-about .about-top:focus-visible {
  border-color: var(--path);
  color: var(--path);
}

/* ---------- 进入视口的轻微位移 ---------- */

.page-about [data-reveal] {
  opacity: 1;
}

.page-about .js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.page-about .js [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-facts li {
    grid-template-columns: 150px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }

  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-left: 0;
    gap: 4px 26px;
  }

  .page-about .about-role {
    border-left: 1px solid var(--line);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 46px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 230px;
    gap: 48px;
  }

  .page-about .about-hero__side {
    padding: 22px 24px;
  }

  .page-about .about-reach {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .about-band {
    padding: 24px 28px;
    grid-template-columns: 160px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }
}

@media (min-width: 980px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 54px;
    padding-top: 52px;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--head-total) + 28px);
  }

  .page-about .about-rail__cap {
    display: block;
    margin: 0 0 12px;
    font-size: 11px;
    letter-spacing: 0.2em;
    color: var(--haze);
  }

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

  .page-about .about-rail__link {
    display: block;
    padding: 13px 6px 13px 13px;
    border: 0;
    border-left: 2px solid var(--line-strong);
    border-radius: 0;
    white-space: normal;
    margin-bottom: 2px;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-left-color: var(--path);
  }

  .page-about .about-rail__link.is-active,
  .page-about .about-rail__link.is-current {
    border-left-color: var(--path);
  }

  .page-about .about-rail__yr {
    display: block;
    font-size: 17px;
  }

  .page-about .about-rail__lb {
    display: block;
    margin-top: 4px;
    font-size: 10px;
    letter-spacing: 0.1em;
  }

  .page-about .about-chapter {
    padding-bottom: 40px;
    margin-bottom: 40px;
  }

  .page-about .about-band {
    margin-bottom: 40px;
  }

  .page-about .about-chapter__body p {
    font-size: 17px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-roles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}
<<<END>>>