.page-about {
  --about-rail-w: 180px;
  --about-body: #B9C2D0;
}

.page-about .breadcrumb {
  padding-top: clamp(16px, 2vw, 26px);
}

.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.5vw, 46px);
  padding-top: clamp(20px, 2.6vw, 38px);
  padding-bottom: clamp(64px, 9vw, 140px);
}

@media (min-width: 980px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 72px);
  }
}

/* ---------- 赛季刻度栏 ---------- */

.page-about .about-shell__rail {
  min-width: 0;
  border-top: 2px solid var(--line);
  padding-top: 14px;
}

@media (min-width: 980px) {
  .page-about .about-shell__rail {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    align-self: start;
    border-top: 2px solid var(--red);
  }
}

.page-about .about-rail {
  list-style: none;
  margin: 12px 0 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 2px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .22s var(--ease), color .22s var(--ease), background-color .22s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  border-color: var(--cyan);
  color: var(--white);
  background: #10151d;
}

.page-about .about-rail__num {
  color: var(--gold);
  font-weight: 500;
}

.page-about .about-rail__name {
  font-size: 11px;
  letter-spacing: .08em;
}

@media (min-width: 980px) {
  .page-about .about-rail {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    justify-content: space-between;
    width: 100%;
    padding: 9px 12px;
  }
}

/* ---------- 主内容纵向节奏 ---------- */

.page-about .about-shell__main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(46px, 6vw, 98px);
}

.page-about .about-shell__main p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--about-body);
}

.page-about .about-note {
  margin-top: clamp(18px, 2.4vw, 28px) !important;
  padding-left: 16px;
  border-left: 3px solid var(--amber);
  font-size: 15px !important;
  color: var(--muted) !important;
  max-width: 68ch;
}

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

.page-about .about-note a:hover,
.page-about .about-note a:focus-visible {
  color: var(--white);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  border: 2px solid var(--line);
  background: var(--panel);
  padding: clamp(24px, 3.6vw, 54px);
  box-shadow: 12px 12px 0 0 rgba(226, 49, 39, .16);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: -2px;
  right: -2px;
  top: -2px;
  height: 6px;
  background: linear-gradient(90deg, var(--red) 0 50%, var(--blue) 50% 100%);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(30px, 4.8vw, 60px);
  line-height: 1.06;
  letter-spacing: -.015em;
  color: var(--white);
}

.page-about .about-hero .lede {
  margin-top: 18px;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .about-figures {
  list-style: none;
  margin: clamp(24px, 3vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
}

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

.page-about .about-figures li {
  background: var(--ink);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-figures__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 500;
  line-height: 1;
  color: var(--white);
}

.page-about .about-figures li:nth-child(1) .about-figures__num {
  color: var(--gold);
}

.page-about .about-figures li:nth-child(4) .about-figures__num {
  color: var(--cyan);
}

.page-about .about-figures__key {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}

/* ---------- 章节骨架 ---------- */

.page-about .about-chapter {
  border-top: 2px solid var(--line);
  padding-top: clamp(22px, 3vw, 38px);
}

.page-about .about-chapter--last {
  border-top: 2px solid var(--cyan);
}

.page-about .about-chapter__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(22px, 3vw, 40px);
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(52px, 9vw, 116px);
  line-height: .82;
  letter-spacing: -.03em;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(245, 247, 250, .3);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(24px, 3.4vw, 42px);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-about .about-chapter__lead {
  margin: 0 !important;
  max-width: 66ch;
  font-size: 16px !important;
  line-height: 1.8 !important;
}

/* ---------- 图片容器 ---------- */

.page-about .media-frame {
  margin: 0 0 clamp(24px, 3vw, 40px);
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: 8px 8px 0 0 rgba(32, 80, 224, .12);
}

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

.page-about .about-chapter .media-frame {
  margin-top: clamp(20px, 2.6vw, 34px);
}

/* ---------- 01 里程碑 ---------- */

.page-about .about-milestones {
  list-style: none;
  margin: 0;
  padding: 0 0 0 clamp(18px, 2.6vw, 32px);
  border-left: 2px solid var(--line);
}

.page-about .about-mile {
  position: relative;
  padding-bottom: clamp(26px, 3.6vw, 44px);
}

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

.page-about .about-mile::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--ink);
  border: 2px solid var(--gold);
}

.page-about .about-mile:last-child::before {
  background: var(--gold);
}

.page-about .about-mile__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin-bottom: 8px;
}

.page-about .about-mile__season {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--white);
}

.page-about .about-mile__scale {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .about-mile__title {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 600;
  line-height: 1.32;
  color: var(--white);
}

.page-about .about-mile p {
  max-width: 64ch;
  font-size: 15px;
}

/* ---------- 02 团队 ---------- */

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
  box-shadow: 12px 12px 0 0 rgba(46, 143, 138, .14);
}

@media (min-width: 760px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-team {
  background: var(--panel);
  padding: clamp(20px, 2.4vw, 32px);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-team:nth-child(1) { border-top: 3px solid var(--red); }
.page-about .about-team:nth-child(2) { border-top: 3px solid var(--blue); }
.page-about .about-team:nth-child(3) { border-top: 3px solid var(--cyan); }

.page-about .about-team__role {
  font-family: var(--font-mono);
  font-size: 11px !important;
  letter-spacing: .16em;
  color: var(--muted) !important;
}

.page-about .about-team__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 500;
  line-height: 1;
  color: var(--white);
}

.page-about .about-team__title {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--white);
}

.page-about .about-team p {
  font-size: 15px;
}

/* ---------- 03 数据来源 ---------- */

.page-about .about-sources {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

@media (min-width: 760px) {
  .page-about .about-sources {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-source {
  border: 2px solid var(--line);
  background: var(--panel);
  padding: clamp(18px, 2.2vw, 26px);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-source__idx {
  font-family: var(--font-mono);
  font-size: 11px !important;
  letter-spacing: .16em;
  color: var(--amber) !important;
}

.page-about .about-source h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-source p {
  font-size: 15px;
}

/* ---------- 04 编号与标准 ---------- */

.page-about .about-standards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
  margin-bottom: clamp(24px, 3vw, 38px);
}

@media (min-width: 800px) {
  .page-about .about-standards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-standard {
  background: var(--ink);
  padding: clamp(18px, 2.2vw, 26px);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-standard h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-standard--red h3 { border-left: 3px solid var(--red); padding-left: 10px; }
.page-about .about-standard--blue h3 { border-left: 3px solid var(--blue); padding-left: 10px; }
.page-about .about-standard--amber h3 { border-left: 3px solid var(--amber); padding-left: 10px; }

.page-about .about-standard p {
  font-size: 15px;
}

.page-about .about-table-cap {
  caption-side: top;
  text-align: left;
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
  background: var(--ink);
  border-bottom: 1px solid var(--line);
}

.page-about .table-scroll {
  border: 2px solid var(--line);
  overflow-x: auto;
  background: var(--panel);
}

.page-about .data-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-about .data-table th,
.page-about .data-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  color: var(--about-body);
}

.page-about .data-table th {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--ink);
}

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

.page-about .data-table td:first-child {
  color: var(--white);
  font-weight: 600;
  white-space: nowrap;
}

.page-about .data-table td.is-red { border-left: 3px solid var(--red); }
.page-about .data-table td.is-blue { border-left: 3px solid var(--blue); }

/* ---------- 05 荣誉与合作 ---------- */

.page-about .about-honors {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-honor {
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: 8px 8px 0 0 rgba(201, 162, 39, .14);
}

.page-about .about-honor summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: clamp(16px, 2vw, 22px);
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.8vw, 19px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--white);
}

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

.page-about .about-honor summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--gold);
}

.page-about .about-honor[open] summary::after {
  content: "–";
}

.page-about .about-honor__badge {
  flex: none;
  padding: 4px 8px;
  border: 1px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .about-honor__body {
  padding: 0 clamp(18px, 2.4vw, 26px) clamp(18px, 2.4vw, 26px);
}

.page-about .about-honor__body p {
  max-width: 66ch;
  font-size: 15px;
}

/* ---------- 06 承诺清单 ---------- */

.page-about .about-promise-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-about .about-promise {
  background: var(--ink);
  padding: clamp(16px, 2vw, 22px) clamp(18px, 2.4vw, 28px);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
}

.page-about .about-promise__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--red);
}

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

/* ---------- 收尾 ---------- */

.page-about .about-outro {
  border: 2px solid var(--line);
  border-top: 3px solid var(--gold);
  padding: clamp(28px, 4.4vw, 64px);
  background: var(--panel);
}

.page-about .about-outro__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(26px, 4.2vw, 52px);
  line-height: 1.08;
  letter-spacing: -.015em;
  color: var(--white);
}

.page-about .about-outro p {
  max-width: 64ch;
  font-size: 16px;
}

.page-about .about-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link {
    transition: none;
  }
}

/* ---------- 窄屏保护 ---------- */

@media (max-width: 480px) {
  .page-about .about-hero {
    box-shadow: 6px 6px 0 0 rgba(226, 49, 39, .16);
  }

  .page-about .about-team-grid,
  .page-about .about-honor {
    box-shadow: 6px 6px 0 0 rgba(32, 80, 224, .12);
  }

  .page-about .media-frame {
    box-shadow: none;
  }

  .page-about .about-promise {
    grid-template-columns: minmax(0, 1fr);
  }
}
<<<END>>>