.page-about {
  --about-edge: rgba(43, 58, 114, .55);
  --about-soft: rgba(242, 246, 255, .86);
  --about-dim: rgba(147, 160, 200, .9);
  --about-line: rgba(43, 58, 114, .5);
}

.page-about .breadcrumbs {
  margin-top: clamp(14px, 2vw, 22px);
  font-size: 13px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(18px, 3vw, 32px) clamp(28px, 5vw, 52px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -12%;
  right: -18%;
  width: min(760px, 96vw);
  height: 540px;
  background: repeating-linear-gradient(
    115deg,
    rgba(50, 225, 210, .10) 0 2px,
    transparent 2px 24px
  );
  -webkit-mask-image: radial-gradient(62% 62% at 68% 22%, #000, transparent 76%);
  mask-image: radial-gradient(62% 62% at 68% 22%, #000, transparent 76%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-hero__title {
  margin: 10px 0 14px;
  font-size: clamp(30px, 5.4vw, 52px);
  line-height: 1.06;
  letter-spacing: -.02em;
}

.page-about .about-hero__title-em {
  display: block;
  margin-top: 10px;
  font-size: .54em;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-about .about-hero__lead .lede {
  max-width: 58ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-hero__collage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  align-content: start;
}

.page-about .about-tile {
  display: block;
  position: relative;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(16, 27, 70, .96), rgba(11, 19, 56, .92));
  color: var(--white);
  text-decoration: none;
  transition: transform var(--t-fast), border-color var(--t-fast);
}

.page-about .about-tile:hover,
.page-about .about-tile:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.page-about .about-tile--wide {
  grid-column: 1 / -1;
  padding: 22px;
  background: linear-gradient(140deg, rgba(50, 225, 210, .16), rgba(16, 27, 70, .96) 58%);
}

.page-about .about-tile__num {
  font-family: var(--f-num);
  font-size: clamp(34px, 5.4vw, 46px);
  line-height: 1;
  color: var(--amber);
}

.page-about .about-tile--wide .about-tile__num {
  font-size: clamp(44px, 7vw, 62px);
}

.page-about .about-tile__unit {
  margin-left: 8px;
  font-size: 12px;
  color: var(--about-dim);
}

.page-about .about-tile__title {
  display: block;
  margin-top: 10px;
  font-size: 15px;
  font-weight: 700;
}

.page-about .about-tile__note {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--about-dim);
}

.page-about .about-anchors {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line-soft);
  list-style: none;
  font-size: 13px;
}

.page-about .about-anchors a {
  color: var(--about-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .about-anchors a:hover,
.page-about .about-anchors a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 阶段时间线 ---------- */

.page-about .about-timeline__lede {
  max-width: 62ch;
}

.page-about .about-figure {
  margin: clamp(20px, 3vw, 28px) 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  object-fit: cover;
}

.page-about .about-timeline__inner {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .about-board {
  padding: 22px;
  border-radius: var(--r-lg);
}

.page-about .about-board__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 12px;
  margin-top: 14px;
}

.page-about .about-board .stat__num {
  display: block;
  font-family: var(--f-num);
  font-size: clamp(30px, 4.4vw, 42px);
  line-height: 1;
  color: var(--white);
}

.page-about .about-board .stat__num small {
  margin-left: 3px;
  font-size: .38em;
  color: var(--about-dim);
}

.page-about .about-board .stat__label {
  display: block;
  margin-top: 7px;
  font-size: 12px;
  color: var(--about-dim);
}

.page-about .about-board__note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.55;
  color: var(--about-dim);
}

.page-about .phase-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .phase {
  --tint: 43, 58, 114;
  position: relative;
  padding: 20px 20px 20px 26px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  background:
    linear-gradient(102deg, rgba(var(--tint), .28), rgba(var(--tint), 0) 78%),
    rgba(16, 27, 70, .5);
  transition: transform var(--t-fast), border-color var(--t-fast);
}

.page-about .phase::before {
  content: "";
  position: absolute;
  top: 26px;
  left: -1px;
  width: 3px;
  height: 40px;
  border-radius: 0 3px 3px 0;
  background: var(--cyan);
}

.page-about .phase:hover,
.page-about .phase:focus-within {
  transform: translateX(3px);
  border-color: var(--cyan);
}

.page-about .phase--1 { --tint: 43, 58, 114; }
.page-about .phase--2 { --tint: 58, 128, 168; }
.page-about .phase--3 { --tint: 50, 190, 190; }
.page-about .phase--4 { --tint: 126, 217, 87; }

.page-about .phase__tag {
  margin: 0;
  font-family: var(--f-num);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan-soft);
}

.page-about .phase__title {
  margin: 8px 0;
  font-size: 19px;
  line-height: 1.35;
  color: var(--white);
}

.page-about .phase__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--about-soft);
}

/* ---------- 赛事覆盖 ---------- */

.page-about .coverage-grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(18px, 3vw, 26px);
  border: 1px solid var(--about-edge);
  border-radius: var(--r-lg);
  background: var(--about-edge);
  overflow: hidden;
}

.page-about .coverage-item {
  padding: 18px;
  background: var(--ink-2);
}

.page-about .coverage-item__num {
  font-family: var(--f-num);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .coverage-item:nth-child(1) .coverage-item__num { color: var(--amber); }
.page-about .coverage-item:nth-child(2) .coverage-item__num { color: var(--cyan); }
.page-about .coverage-item:nth-child(3) .coverage-item__num { color: var(--lilac); }
.page-about .coverage-item:nth-child(4) .coverage-item__num { color: var(--lime); }
.page-about .coverage-item:nth-child(5) .coverage-item__num { color: var(--amber); }
.page-about .coverage-item:nth-child(6) .coverage-item__num { color: var(--cyan); }

.page-about .coverage-item__name {
  margin: 8px 0 6px;
  font-size: 17px;
  color: var(--white);
}

.page-about .coverage-item__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.58;
  color: var(--about-dim);
}

.page-about .coverage-notes {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.page-about .cover-note {
  margin: 0;
  padding: 14px 16px;
  border-left: 2px solid var(--cyan);
  background: rgba(255, 255, 255, .035);
  font-size: 14px;
  line-height: 1.55;
  color: var(--about-soft);
}

/* ---------- 数据来源 ---------- */

.page-about .about-sources__inner {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin-top: 22px;
}

.page-about .about-sources__text .lede {
  max-width: 60ch;
}

.page-about .source-list {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .source-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--about-soft);
}

.page-about .source-list li::before {
  content: "";
  position: absolute;
  top: .52em;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .sync-strip {
  display: grid;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .sync-step {
  padding: 16px 18px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  background: rgba(16, 27, 70, .72);
}

.page-about .sync-step__num {
  display: block;
  font-family: var(--f-num);
  font-size: 22px;
  line-height: 1;
  color: var(--amber);
}

.page-about .sync-step__title {
  display: block;
  margin: 8px 0 5px;
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
}

.page-about .sync-step__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.58;
  color: var(--about-dim);
}

/* ---------- 团队 ---------- */

.page-about .about-team .lede {
  max-width: 60ch;
}

.page-about .about-team .filter-bar {
  margin: clamp(18px, 3vw, 26px) 0 18px;
}

.page-about .team-grid {
  display: grid;
  gap: 14px;
}

.page-about .team-card {
  padding: 20px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(16, 27, 70, .94), rgba(11, 19, 56, .9));
}

.page-about .team-card__index {
  font-family: var(--f-num);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .team-card__title {
  margin: 8px 0 10px;
  font-size: 18px;
  color: var(--white);
}

.page-about .team-card__text {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--about-soft);
}

.page-about .team-card__foot {
  margin: 0;
  padding-top: 11px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.55;
  color: var(--about-dim);
}

/* ---------- 设备适配 ---------- */

.page-about .about-devices .lede {
  max-width: 66ch;
}

.page-about .about-table-wrap {
  margin-top: 22px;
  border: 1px solid var(--about-edge);
  border-radius: var(--r-lg);
  overflow-x: auto;
}

.page-about .about-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
}

.page-about .about-table th,
.page-about .about-table td {
  padding: 14px 16px;
  text-align: left;
  font-size: 14px;
  line-height: 1.5;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-table thead th {
  background: rgba(16, 27, 70, .92);
  font-size: 12px;
  letter-spacing: .08em;
  font-weight: 600;
  color: var(--about-dim);
  border-bottom-color: var(--about-edge);
}

.page-about .about-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .about-table tbody td {
  color: var(--about-soft);
}

.page-about .about-table tbody td:first-child {
  font-weight: 600;
  color: var(--cyan-soft);
}

.page-about .about-devices__note {
  margin: 18px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--amber);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--about-dim);
}

/* ---------- 本地服务 ---------- */

.page-about .about-local__inner {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: 22px;
}

.page-about .about-local__info .lede {
  max-width: 54ch;
}

.page-about .contact-list {
  display: grid;
  gap: 16px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .contact-list__key {
  display: block;
  margin-bottom: 5px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--about-dim);
}

.page-about .contact-list__val {
  display: inline-block;
  margin-right: 10px;
  font-size: 16px;
  color: var(--white);
  word-break: break-word;
}

.page-about .about-local__tip {
  margin: 22px 0 0;
  padding: 14px 16px;
  border-radius: var(--r-md);
  background: rgba(50, 225, 210, .08);
  border-left: 2px solid var(--cyan);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--about-soft);
}

/* ---------- 结尾入口条 ---------- */

.page-about .about-next {
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .about-next__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 20px;
  padding: 22px clamp(18px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(120deg, rgba(50, 225, 210, .12), rgba(255, 158, 44, .12));
}

.page-about .about-next__text {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.55;
  color: var(--about-soft);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .coverage-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .coverage-notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .sync-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-sources__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
  }

  .page-about .about-local__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-tile--offset {
    margin-top: 16px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-timeline__inner {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }

  .page-about .about-board {
    position: sticky;
    top: 92px;
  }
}

@media (max-width: 480px) {
  .page-about .about-hero__collage {
    grid-template-columns: 1fr;
  }

  .page-about .about-tile--wide {
    grid-column: auto;
  }

  .page-about .phase {
    padding: 18px 16px 18px 20px;
  }
}
<<<END>>>