.page-about {
  --about-rail-w: 178px;
  display: block;
  color: var(--white);
}

.page-about .container {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: clamp(18px, 3vw, 30px);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-mid);
}

.page-about .breadcrumb a {
  color: var(--gold-hi);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.24s ease;
}

.page-about .breadcrumb a:hover {
  border-bottom-color: var(--line-mid);
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(22px, 3.6vw, 40px) clamp(36px, 5vw, 64px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: var(--pad-x);
  right: var(--pad-x);
  bottom: -1px;
  height: 6px;
  background: repeating-linear-gradient(
    to right,
    var(--line-mid) 0 1px,
    transparent 1px 18px
  );
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
  margin-top: clamp(22px, 3.4vw, 40px);
}

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

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-line);
  margin: 0 0 14px;
}

.page-about h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 4.6vw, 46px);
  line-height: 1.22;
  letter-spacing: 0.01em;
  color: var(--white);
  text-shadow: 0 0 18px rgba(157, 92, 255, 0.28);
}

.page-about .about-hero__lede {
  max-width: 34em;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(233, 242, 237, 0.86);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: clamp(16px, 2.2vw, 22px) 0 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-about .fact {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .fact__num {
  font-size: 22px;
  line-height: 1.1;
  color: var(--gold-hi);
  letter-spacing: 0.02em;
  text-shadow: var(--glow-gold);
}

.page-about .fact__label {
  font-size: 13px;
  color: var(--mist);
  line-height: 1.6;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(22px, 3vw, 32px) 0 0;
}

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

.page-about .media-frame img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border: 1px solid var(--line-soft);
  border-radius: 2px;
}

.page-about .media-frame__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  line-height: 1.7;
}

/* ---------- 主体双栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  padding-block: clamp(36px, 5vw, 72px) clamp(48px, 6vw, 88px);
}

.page-about .about-rail {
  min-width: 0;
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 18px;
}

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

.page-about .about-rail__list {
  display: flex;
  gap: 10px;
  margin: 12px 0 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__link {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 9px 13px;
  min-width: max-content;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  border: 1px solid var(--line-soft);
  background: rgba(12, 42, 34, 0.5);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  transition: color 0.24s ease, border-color 0.24s ease, background 0.24s ease;
}

.page-about .about-rail__link .mono {
  color: var(--gold-hi);
}

.page-about .about-rail__tag {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(126, 154, 144, 0.9);
}

.page-about .about-rail__link:hover {
  color: var(--white);
  border-color: rgba(157, 92, 255, 0.5);
  background: rgba(27, 26, 58, 0.7);
}

.page-about .about-rail__note {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-body__main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(34px, 4.6vw, 64px);
}

/* ---------- 展签式区块 ---------- */
.page-about .tag-plate {
  position: relative;
  padding-left: clamp(18px, 2.4vw, 30px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--line-soft);
}

.page-about .tag-plate::before {
  content: "";
  position: absolute;
  left: 0;
  top: clamp(30px, 3.4vw, 42px);
  width: 13px;
  height: 1px;
  background: var(--line-soft);
  transition: background 0.32s ease, box-shadow 0.32s ease;
}

.page-about .tag-plate.is-revealed::before {
  background: var(--gold-hi);
  box-shadow: var(--glow-gold);
}

.page-about .tag-plate__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  height: 26px;
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
  border: 1px solid rgba(255, 138, 61, 0.45);
  background: rgba(255, 138, 61, 0.08);
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 9px 100%, 0 calc(100% - 9px));
}

.page-about .tag-plate__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(22px, 2.7vw, 32px);
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--white);
  text-shadow: 0 0 18px rgba(157, 92, 255, 0.22);
}

.page-about .tag-plate__intro {
  max-width: 34em;
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(233, 242, 237, 0.78);
}

.page-about .tag-plate__body {
  margin-top: clamp(16px, 2.2vw, 24px);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .tag-plate__body p {
  max-width: 34em;
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(233, 242, 237, 0.86);
}

.page-about .tag-plate__body a,
.page-about .about-closing a {
  color: var(--gold-hi);
  text-decoration: none;
  border-bottom: 1px solid var(--line-mid);
  transition: color 0.24s ease, border-color 0.24s ease;
}

.page-about .tag-plate__body a:hover,
.page-about .about-closing a:hover {
  color: var(--white);
  border-bottom-color: var(--neon);
}

/* ---------- 四条主线卡片 ---------- */
.page-about .line-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(20px, 2.6vw, 28px);
}

.page-about .line-card {
  position: relative;
  min-width: 0;
  padding: 22px 20px 24px;
  background: linear-gradient(140deg, rgba(12, 42, 34, 0.94), rgba(27, 26, 58, 0.62));
  border: 1px solid var(--line-soft);
  clip-path: polygon(
    0 0,
    calc(100% - var(--cut-md)) 0,
    100% var(--cut-md),
    100% 100%,
    var(--cut-md) 100%,
    0 calc(100% - var(--cut-md))
  );
  transition: transform 0.26s ease, border-color 0.26s ease;
}

.page-about .line-card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, transparent 28%, rgba(240, 208, 140, 0.13) 50%, transparent 72%);
  opacity: 0;
  transition: opacity 0.32s ease;
}

.page-about .line-card:hover {
  transform: translateY(-4px);
  border-color: rgba(157, 92, 255, 0.5);
}

.page-about .line-card:hover::after {
  opacity: 1;
}

.page-about .line-card__code {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--neon);
}

.page-about .line-card__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.4;
  color: var(--white);
}

.page-about .line-card__text {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(233, 242, 237, 0.84);
}

.page-about .line-card__extra {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
  max-height: none;
  opacity: 1;
  overflow: hidden;
}

/* ---------- 数据更新节奏 ---------- */
.page-about .data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(18px, 2.4vw, 26px);
}

.page-about .data-grid__text {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .data-grid__text p {
  max-width: 34em;
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(233, 242, 237, 0.86);
}

.page-about .pulse-list {
  min-width: 0;
  margin: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .pulse-list__row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .pulse-list__key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold-line);
}

.page-about .pulse-list__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(233, 242, 237, 0.86);
}

.page-about .pulse-list__num {
  color: var(--gold-hi);
  font-size: 16px;
}

.page-about .data-grid__media {
  min-width: 0;
  margin: 0;
}

/* ---------- 团队角色 ---------- */
.page-about .role-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .role {
  min-width: 0;
  padding: 18px 0 20px;
  border-top: 1px solid var(--line-soft);
}

.page-about .role:first-child {
  border-top-color: var(--line-mid);
}

.page-about .role__num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .role__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.5;
  color: var(--white);
}

.page-about .role__text {
  margin: 8px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(233, 242, 237, 0.82);
}

/* ---------- 发展历程 ---------- */
.page-about .history-banner {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
}

.page-about .history-banner img {
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  display: block;
  border: 1px solid var(--line-soft);
}

.page-about .timeline {
  position: relative;
  margin: clamp(20px, 2.8vw, 30px) 0 0;
  padding: 0 0 0 22px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--line-mid), rgba(201, 163, 86, 0.1));
}

.page-about .timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 0 0 clamp(22px, 3vw, 30px);
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 1px solid var(--gold-line);
  box-shadow: 0 0 0 3px rgba(6, 18, 14, 0.9);
}

.page-about .timeline__item:target::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 138, 61, 0.2);
}

.page-about .timeline__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.1em;
  color: var(--gold-hi);
}

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

.page-about .timeline__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.5;
  color: var(--white);
}

.page-about .timeline__body p {
  margin: 7px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(233, 242, 237, 0.8);
}

/* ---------- 合作伙伴 ---------- */
.page-about .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(18px, 2.4vw, 26px);
}

.page-about .partner {
  min-width: 0;
  padding: 18px 18px 20px;
  background: rgba(18, 70, 58, 0.42);
  border-left: 1px solid var(--line-mid);
  border-top: 1px solid var(--line-soft);
  border-right: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  transition: background 0.26s ease, border-left-color 0.26s ease;
}

.page-about .partner:hover {
  background: rgba(18, 70, 58, 0.68);
  border-left-color: var(--orange);
}

.page-about .partner__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 16px;
  line-height: 1.5;
  color: var(--gold-hi);
}

.page-about .partner__text {
  margin: 9px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(233, 242, 237, 0.8);
}

/* ---------- 收束区 ---------- */
.page-about .value-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: clamp(18px, 2.4vw, 26px);
}

.page-about .value-grid__col {
  min-width: 0;
  padding: 16px 0 18px;
  border-top: 1px solid var(--line-soft);
}

.page-about .value-grid__col p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(233, 242, 237, 0.84);
}

.page-about .value-grid__k {
  margin-bottom: 7px !important;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--neon) !important;
}

.page-about .about-closing {
  position: relative;
  margin-top: clamp(26px, 3.4vw, 40px);
  padding: clamp(22px, 3vw, 32px) clamp(20px, 3vw, 34px);
  background: linear-gradient(140deg, rgba(18, 70, 58, 0.78), rgba(27, 26, 58, 0.6));
  border: 1px solid var(--line-soft);
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - var(--cut-lg)),
    calc(100% - var(--cut-lg)) 100%,
    0 100%
  );
}

.page-about .about-closing__text {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(233, 242, 237, 0.9);
}

.page-about .about-closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0 0;
}

.page-about .about-closing__links {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .line-card__extra {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
    transition: max-height 0.28s ease, opacity 0.28s ease, margin-top 0.28s ease;
  }

  .page-about .line-card:hover .line-card__extra,
  .page-about .line-card:focus-within .line-card__extra {
    max-height: 90px;
    opacity: 1;
    margin-top: 10px;
  }

  .page-about .role-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(20px, 3vw, 36px);
  }

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

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

  .page-about .value-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(20px, 3vw, 36px);
  }

  .page-about .timeline__item {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 0 clamp(14px, 2vw, 24px);
    align-items: start;
  }

  .page-about .timeline__year {
    text-align: right;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }

  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 68px);
    align-items: start;
  }

  .page-about .about-rail {
    border-bottom: none;
    padding-bottom: 0;
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    margin-top: 16px;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    width: 100%;
    padding: 11px 0 11px 16px;
    border: none;
    border-left: 1px solid var(--line-soft);
    background: transparent;
    clip-path: none;
    transition: border-left-color 0.24s ease, color 0.24s ease;
  }

  .page-about .about-rail__link:hover {
    background: transparent;
    border-left-color: var(--orange);
    color: var(--white);
  }

  .page-about .data-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }

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

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

  .page-about .value-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .line-card,
  .page-about .line-card::after,
  .page-about .about-rail__link,
  .page-about .tag-plate::before,
  .page-about .line-card__extra {
    transition: none !important;
  }

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