/* ===== 平台介绍 / page-about ===== */

.page-about {
  overflow-wrap: break-word;
}

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

.page-about .about-hero {
  position: relative;
}

.page-about .about-hero__title {
  max-width: 18ch;
  margin: 12px 0 0;
  color: var(--cream);
}

.page-about .about-hero__lede {
  max-width: 68ch;
  margin-top: 24px;
  color: var(--paper);
}

/* —— 关键读数条 —— */
.page-about .about-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 40px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .about-strip__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 16px 20px;
  background: var(--ink);
}

.page-about .about-strip__num {
  font-size: clamp(1.8rem, 6vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

/* —— 通用两栏结构 —— */
.page-about .about-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-about .about-cols__main,
.page-about .about-cols__aside {
  min-width: 0;
}

/* —— 大数字卡 —— */
.page-about .stat-card {
  padding: 24px 20px 26px;
  background: linear-gradient(158deg, var(--room) 0%, var(--ink) 100%);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--amber);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .stat-card__label {
  display: block;
  margin-bottom: 14px;
}

.page-about .stat-card__num {
  display: block;
  font-size: clamp(2.4rem, 8vw, 3.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--board);
}

.page-about .stat-card__note {
  display: block;
  margin: 14px 0 0;
  color: var(--paper);
  font-size: 14px;
}

/* —— 团队岗位表 —— */
.page-about .team-list {
  list-style: none;
  margin: 44px 0 0;
  padding: 0;
  border-top: 1px solid var(--rule);
}

.page-about .team-row {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 4px;
  border-bottom: 1px solid var(--rule);
  transition: background-color 0.25s var(--ease);
}

.page-about .team-row:hover {
  background: rgba(87, 201, 190, 0.06);
}

.page-about .team-row__count {
  font-size: 1.9rem;
  line-height: 1.05;
  color: var(--cream);
  transition: color 0.25s var(--ease);
}

.page-about .team-row:hover .team-row__count {
  color: var(--amber);
}

.page-about .team-row__body .t-sub {
  margin: 0 0 6px;
}

.page-about .team-row__body .para {
  margin: 0;
}

/* —— 作业链路 —— */
.page-about .chain-wrap {
  margin-top: 34px;
}

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

.page-about .chain-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px dashed var(--rule);
}

.page-about .chain-step:last-child {
  border-bottom: 1px dashed var(--rule);
}

.page-about .chain-step__no {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  line-height: 1.9;
  color: var(--check);
  font-variant-numeric: tabular-nums;
}

.page-about .chain-step__body .t-sub {
  margin: 0 0 6px;
}

.page-about .chain-step__body .para {
  margin: 0;
}

/* —— 赛区覆盖 —— */
.page-about .zone-board {
  margin-top: 34px;
  border-top: 1px solid var(--rule);
}

.page-about .zone-row {
  display: block;
  padding: 16px 4px 18px;
  border-bottom: 1px solid var(--rule);
  transition: background-color 0.25s var(--ease);
}

.page-about .zone-row:hover {
  background: rgba(242, 166, 59, 0.07);
}

.page-about .zone-row__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 16px;
  margin-bottom: 12px;
}

.page-about .zone-row__name {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.page-about .zone-row__stat {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--paper);
}

.page-about .zone-row__bar {
  display: block;
  height: 4px;
  background: var(--rule);
  overflow: hidden;
}

.page-about .zone-row__fill {
  display: block;
  height: 100%;
  width: 40%;
  background: linear-gradient(90deg, var(--check), var(--amber));
  transition: width 0.4s var(--ease);
}

.page-about .zone-row:nth-child(1) .zone-row__fill,
.page-about .zone-row:nth-child(2) .zone-row__fill {
  width: 100%;
}

.page-about .zone-row:nth-child(3) .zone-row__fill,
.page-about .zone-row:nth-child(4) .zone-row__fill {
  width: 78%;
}

.page-about .zone-footnote {
  margin-top: 20px;
  color: var(--paper);
  font-size: 14px;
}

/* —— 发展历程 —— */
.page-about .timeline-media {
  margin: 32px 0 40px;
}

.page-about .timeline {
  list-style: none;
  margin: 0 0 0 12px;
  padding: 0;
  border-left: 1px solid var(--rule);
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 32px 22px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--ink);
  border: 1px solid var(--check);
  transform: rotate(45deg);
  transition: background-color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .tl-item:hover::before {
  background: var(--amber);
  border-color: var(--amber);
}

.page-about .tl-year {
  display: block;
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--amber);
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}

.page-about .tl-item .t-sub {
  margin: 0 0 6px;
}

.page-about .tl-item .para {
  margin: 0;
}

/* —— 规范条目 —— */
.page-about .spec-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rule);
}

.page-about .spec-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 14px 2px;
  border-bottom: 1px dashed var(--rule);
}

.page-about .spec-row__key {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--paper);
}

.page-about .spec-row__val {
  font-size: 15px;
  color: var(--cream);
}

/* —— 合作生态 —— */
.page-about .eco-list {
  margin-top: 38px;
}

.page-about .eco-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding: 24px 4px;
  border-top: 1px solid var(--rule);
}

.page-about .eco-row:last-child {
  border-bottom: 1px solid var(--rule);
}

.page-about .eco-row__num {
  font-size: clamp(1.9rem, 6.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .eco-row__body .t-sub {
  margin: 0 0 6px;
}

.page-about .eco-row__body .para {
  margin: 0;
}

/* —— 页尾行动区 —— */
.page-about .about-cta__inner {
  position: relative;
}

.page-about .about-cta__title {
  margin-top: 10px;
}

.page-about .about-cta__lede {
  max-width: 56ch;
  margin-top: 18px;
}

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

/* —— 图片容器补充 —— */
.page-about .media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

/* —— 响应式 —— */
@media (min-width: 640px) {
  .page-about .about-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .spec-row {
    grid-template-columns: 1fr auto;
    align-items: baseline;
    gap: 20px;
  }

  .page-about .team-row {
    grid-template-columns: 78px minmax(0, 1fr);
    gap: 24px;
  }

  .page-about .team-row__count {
    font-size: 2.4rem;
  }
}

@media (min-width: 880px) {
  .page-about .about-cols {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 44px 28px;
  }

  .page-about .about-cols__main {
    grid-column: 1 / span 7;
  }

  .page-about .about-cols__aside {
    grid-column: 9 / span 4;
    align-self: start;
  }

  .page-about .zone-row {
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr) 220px;
    align-items: center;
    gap: 24px;
    padding: 18px 4px;
  }

  .page-about .zone-row__head {
    display: contents;
  }

  .page-about .zone-row__name {
    grid-column: 1;
  }

  .page-about .zone-row__bar {
    grid-column: 2;
  }

  .page-about .zone-row__stat {
    grid-column: 3;
    justify-self: end;
    text-align: right;
  }

  .page-about .eco-row {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 32px;
    align-items: baseline;
  }

  .page-about .about-cta__inner {
    padding-left: 20px;
    border-left: 2px solid var(--amber);
  }
}

@media (min-width: 1180px) {
  .page-about .tl-item {
    display: grid;
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 8px 28px;
    padding-right: 40px;
  }

  .page-about .tl-year {
    margin-top: 2px;
    margin-bottom: 0;
  }
}
<<<END>>>