.page-about {
  --about-rail: 172px;
  --about-hair: rgba(20, 16, 13, .13);
  background: var(--paper);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: 22px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-top: 18px;
  padding-bottom: 6px;
}

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

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--sans);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(30px, 7vw, 54px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .about-hero__lead {
  margin: 16px 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.78;
  color: #2A241E;
}

.page-about .about-stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-stats__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 13px 14px;
  background: var(--panel);
  border-radius: var(--radius-m);
  border-left: 3px solid var(--blue);
  box-shadow: var(--shadow-panel);
}

.page-about .about-stats__item--key {
  border-left-color: var(--orange);
  background: var(--orange-sand);
}

.page-about .about-stats__num {
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -.01em;
}

.page-about .about-stats__label {
  font-size: 12.5px;
  color: var(--muted);
}

/* ---------- 右侧索引 ---------- */
.page-about .about-index {
  border-top: 2px solid var(--ink);
  padding-top: 12px;
}

.page-about .about-index__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 7px 11px;
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  background: var(--blue-mist);
  color: var(--blue-deep);
}

.page-about .about-index__list .mono {
  font-size: 12px;
  font-weight: 700;
  color: var(--blue);
}

/* ---------- 通用分区骨架 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  padding-top: 54px;
}

.page-about .about-rail {
  display: flex;
  align-items: baseline;
  gap: 10px;
  border-top: 2px solid var(--ink);
  padding-top: 9px;
}

.page-about .about-rail .index-num {
  font-size: 15px;
  color: var(--blue);
}

.page-about .about-body h2 {
  margin: 0 0 14px;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(21px, 3.4vw, 31px);
  line-height: 1.26;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-about .about-body p {
  margin: 0 0 14px;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.78;
  color: #2A241E;
}

.page-about .about-body h3 {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-body a {
  color: var(--blue-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 主张双栏 ---------- */
.page-about .about-two {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-two__col {
  padding: 18px 18px 6px;
  background: rgba(255, 255, 255, .72);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-m);
}

.page-about .about-two__col:first-child {
  border-top: 3px solid var(--blue);
}

.page-about .about-two__col:last-child {
  border-top: 3px solid var(--violet);
}

.page-about .about-two__k {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--blue-deep);
}

.page-about .about-two__col:last-child .about-two__k {
  color: var(--violet);
}

/* ---------- 全宽图 ---------- */
.page-about .about-figure-block {
  padding-top: 44px;
}

.page-about .about-media {
  margin: 0;
  background: var(--blue-mist);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-panel);
}

.page-about .about-media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-l);
  object-fit: cover;
}

.page-about .about-media--wide img {
  aspect-ratio: 16 / 9;
}

.page-about .about-media--3x2 img {
  aspect-ratio: 3 / 2;
}

.page-about .about-media__cap {
  display: block;
  padding: 10px 4px 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--muted);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--blue) 0%, var(--violet) 58%, var(--orange) 100%);
}

.page-about .about-node {
  position: relative;
  padding: 0 0 24px 32px;
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 7px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--panel);
  border: 2px solid var(--blue);
}

.page-about .about-node--key::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 0, .18);
}

.page-about .about-node__year {
  display: block;
  margin-bottom: 4px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--blue);
}

.page-about .about-node--key .about-node__year {
  color: var(--orange);
}

.page-about .about-node__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: #2A241E;
}

/* ---------- 斜向数据流动分隔带 ---------- */
.page-about .about-slash {
  height: 56px;
  margin: 52px 0;
  background: linear-gradient(100deg, var(--blue) 0%, var(--violet) 56%, var(--orange) 100%);
  background-size: 220% 100%;
  clip-path: polygon(0 32%, 100% 0, 100% 68%, 0 100%);
  animation: about-flow 8s linear infinite;
}

@keyframes about-flow {
  from { background-position: 0% 50%; }
  to { background-position: 100% 50%; }
}

/* ---------- 数据来源 ---------- */
.page-about .about-evidence {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 4px;
}

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

.page-about .about-chip-grid {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-chip {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  padding: 7px 13px;
  border-radius: 999px;
  background: var(--blue-mist);
  color: var(--blue-deep);
  border: 1px solid rgba(0, 102, 255, .22);
}

.page-about .about-chip--violet {
  background: rgba(123, 47, 242, .1);
  color: #4A1599;
  border-color: rgba(123, 47, 242, .3);
}

.page-about .about-chip--sand {
  background: var(--orange-sand);
  color: #8A3200;
  border-color: rgba(255, 107, 0, .32);
}

/* ---------- 团队折叠 ---------- */
.page-about .about-team {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-team .acc {
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--violet);
  border-radius: var(--radius-m);
  background: rgba(255, 255, 255, .74);
  overflow: hidden;
}

.page-about .about-team .acc__q {
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 800;
  color: var(--ink);
  cursor: pointer;
}

.page-about .about-team .acc__a {
  padding: 0 18px 16px;
}

.page-about .about-team .acc__a p {
  margin: 0;
  font-size: 14.8px;
}

/* ---------- 合作生态 ---------- */
.page-about .about-network {
  margin-top: 20px;
  padding: 20px 20px 4px;
  background: var(--panel);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-panel);
  border-top: 3px solid var(--orange);
}

.page-about .about-network__title {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-network .about-chip-grid {
  margin-top: 14px;
}

.page-about .about-network__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--about-hair);
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about #network .about-media {
  margin-top: 26px;
}

/* ---------- 坚持的事 ---------- */
.page-about .about-holdings {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-holding {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, .68);
  border: 1px solid var(--about-hair);
  border-radius: 24px 12px 26px 14px;
}

.page-about .about-holding__num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--orange);
  padding-top: 3px;
}

.page-about .about-holding p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin: 34px 0 0;
  padding: 26px 22px;
  border-radius: var(--radius-l);
  background: linear-gradient(118deg, var(--ink-blue) 0%, #171F52 54%, var(--blue-deep) 100%);
  color: #fff;
}

.page-about .about-cta__title {
  margin: 0 0 16px;
  font-size: clamp(17px, 2.6vw, 21px);
  font-weight: 800;
  line-height: 1.4;
  color: #fff;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-cta .btn--ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, .48);
}

.page-about .about-cta .btn--ghost:hover {
  background: rgba(255, 255, 255, .14);
}

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

  .page-about .about-two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1fr) 236px;
    gap: 50px;
    align-items: start;
    padding-top: 30px;
  }

  .page-about .about-index {
    position: sticky;
    top: 94px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-about .about-index__list a {
    border-radius: 10px;
  }

  .page-about .about-split {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 44px;
    padding-top: 76px;
  }

  .page-about .about-evidence {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 28px;
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-about .about-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 28px 30px;
  }

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

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-slash {
    animation: none;
  }
}