.page-about {
  --about-rail: 232px;
  --about-fill-track: rgba(241, 234, 218, .1);
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  padding-top: clamp(26px, 4.5vw, 52px);
  padding-bottom: clamp(36px, 6vw, 84px);
}

.page-about .about-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--ink-50);
  margin-bottom: clamp(18px, 2.8vw, 30px);
}

.page-about .about-crumb a {
  color: var(--ink-70);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

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

.page-about .about-crumb__sep {
  color: var(--hair-strong);
}

.page-about .about-hero__window {
  position: relative;
  padding: clamp(26px, 4.4vw, 58px) clamp(20px, 3.6vw, 56px) clamp(30px, 4.2vw, 56px);
  border: 1px solid var(--hair);
  background:
    linear-gradient(148deg, rgba(23, 85, 59, .52) 0%, rgba(14, 59, 42, .88) 42%, rgba(7, 27, 20, .96) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 52px), calc(100% - 52px) 100%, 0 100%);
}

.page-about .about-hero__window::before {
  content: "";
  position: absolute;
  left: 0;
  top: clamp(26px, 4.4vw, 58px);
  width: 3px;
  height: 62px;
  background: var(--orange);
}

.page-about .about-hero__window::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 7px;
  background-image: repeating-linear-gradient(90deg, var(--hair-strong) 0 1px, transparent 1px 16px);
  pointer-events: none;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6vw, 58px);
  line-height: 1.16;
  letter-spacing: -.012em;
  color: var(--ink);
}

.page-about .about-hero__lead {
  max-width: 60ch;
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  color: var(--ink-70);
  font-size: clamp(15px, 1.3vw, 17.5px);
  line-height: 1.88;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(26px, 3.8vw, 46px) 0 0;
  padding: clamp(18px, 2.6vw, 26px) 0 0;
  border-top: 1px solid var(--hair);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 26px) clamp(18px, 2.8vw, 36px);
}

@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--score-yellow);
}

.page-about .about-hero__cap {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-50);
  letter-spacing: .02em;
}

/* ============ 主体两栏 ============ */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4.5vw, 52px);
  padding-top: clamp(18px, 2.6vw, 36px);
  padding-bottom: clamp(56px, 8vw, 118px);
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(46px, 5.5vw, 82px);
    align-items: start;
  }
}

/* ---- 左侧锚点栏 ---- */
.page-about .about-rail {
  min-width: 0;
}

@media (min-width: 1000px) {
  .page-about .about-rail {
    position: sticky;
    top: 96px;
  }
}

.page-about .about-rail__badge {
  display: none;
}

@media (min-width: 1000px) {
  .page-about .about-rail__badge {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding-bottom: 16px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--hair);
  }
}

.page-about .about-rail__badge-num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--orange);
}

.page-about .about-rail__badge-cap {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-50);
}

.page-about .about-rail__list {
  list-style: none;
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0 0 2px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  border-bottom: 1px solid var(--hair);
}

.page-about .about-rail__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 10px;
  font-size: 13.5px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  color: var(--ink-50);
  border-bottom: 2px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--ink);
}

.page-about .about-rail__link[aria-current="true"] {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.page-about .about-rail__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .06em;
  opacity: .85;
}

@media (min-width: 1000px) {
  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    border-bottom: 0;
    border-left: 1px solid var(--hair);
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    border-bottom: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 12px 0 12px 16px;
    white-space: normal;
    font-size: 13.5px;
  }

  .page-about .about-rail__link[aria-current="true"] {
    border-bottom-color: transparent;
    border-left-color: var(--orange);
    background: linear-gradient(90deg, rgba(255, 107, 26, .12), transparent 78%);
  }
}

/* ---- 章节 ---- */
.page-about .about-stream {
  min-width: 0;
  max-width: 800px;
}

.page-about .about-chapter {
  padding-top: clamp(40px, 6vw, 76px);
  border-top: 1px solid var(--hair);
}

.page-about .about-chapter:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about [id="team"],
.page-about [id="workflow"],
.page-about [id="coverage"],
.page-about [id="partners"],
.page-about [id="standards"] {
  scroll-margin-top: 104px;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-about .about-chapter__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3vw, 33px);
  line-height: 1.28;
  letter-spacing: -.008em;
  color: var(--ink);
}

.page-about .about-chapter__rule {
  flex: 1 1 40px;
  min-width: 24px;
  height: 1px;
  background-image: repeating-linear-gradient(90deg, var(--hair-strong) 0 2px, transparent 2px 10px);
}

.page-about .about-chapter__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.25vw, 17px);
  line-height: 1.88;
  color: var(--ink-70);
}

/* ---- 团队分工 ---- */
.page-about .about-roles {
  list-style: none;
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-role {
  padding: clamp(14px, 2vw, 20px) clamp(16px, 2.2vw, 22px);
  background: rgba(14, 59, 42, .42);
  border-left: 2px solid var(--court-mid);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  border-left-color: var(--orange);
  background: rgba(23, 85, 59, .52);
}

.page-about .about-role__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .about-role__name {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--ink);
}

.page-about .about-role__count {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--score-yellow);
}

.page-about .about-role__track {
  height: 4px;
  margin: 12px 0;
  background: var(--about-fill-track);
  overflow: hidden;
}

.page-about .about-role__fill {
  display: block;
  height: 100%;
  width: var(--fill, 0%);
  background: linear-gradient(90deg, var(--orange), var(--orange-soft));
  animation: about-fill .7s var(--ease) both;
}

@keyframes about-fill {
  from { width: 0; }
  to { width: var(--fill, 0%); }
}

.page-about .about-role__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--ink-70);
}

/* ---- 配图 ---- */
.page-about .about-figure {
  margin: clamp(26px, 3.8vw, 42px) 0 0;
  border: 1px solid var(--hair);
}

.page-about .about-figure .media__img {
  max-width: 100%;
  height: auto;
}

/* ---- 生产链路 ---- */
.page-about .about-flow {
  list-style: none;
  position: relative;
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding: 0 0 0 26px;
  display: grid;
  gap: clamp(20px, 2.8vw, 30px);
}

.page-about .about-flow::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--court-mid) 45%, var(--hair) 100%);
}

.page-about .about-flow__item {
  position: relative;
  min-width: 0;
}

.page-about .about-flow__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 10px;
  height: 10px;
  background: var(--orange);
  transform: rotate(45deg);
  box-shadow: 0 0 0 3px var(--night);
}

.page-about .about-flow__stamp {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--orange-soft);
}

.page-about .about-flow__title {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-flow__desc {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--ink-70);
}

/* ---- 赛事覆盖 ---- */
.page-about .about-coverage {
  display: grid;
  gap: clamp(24px, 3.4vw, 38px);
  margin-top: clamp(24px, 3.4vw, 36px);
}

@media (min-width: 780px) {
  .page-about .about-coverage {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(26px, 3.6vw, 46px);
  }
}

.page-about .about-court {
  margin: 0;
  padding: clamp(14px, 2vw, 22px);
  border: 1px solid var(--hair);
  background: linear-gradient(158deg, rgba(27, 42, 74, .5), rgba(14, 59, 42, .36));
}

.page-about .about-court svg {
  display: block;
  width: 100%;
  height: auto;
  color: rgba(241, 234, 218, .34);
}

.page-about .about-court__caption {
  display: block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--ink-50);
}

.page-about .about-series {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-series__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--hair);
}

.page-about .about-series__idx {
  grid-row: 1 / span 2;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--orange);
}

.page-about .about-series__name {
  margin: 0;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .about-series__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-70);
}

/* ---- 合作展开组 ---- */
.page-about .about-steps {
  margin-top: clamp(24px, 3.4vw, 36px);
  border-top: 1px solid var(--hair);
}

.page-about .about-step {
  border-bottom: 1px solid var(--hair);
}

.page-about .about-step__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: clamp(14px, 2vw, 18px) 0;
  list-style: none;
  cursor: pointer;
  color: var(--ink);
  transition: color .18s var(--ease);
}

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

.page-about .about-step__summary:hover,
.page-about .about-step__summary:focus-visible {
  color: var(--orange);
}

.page-about .about-step__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-about .about-step__label {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.page-about .about-step__chev {
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  margin-right: 4px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform .22s var(--ease);
}

.page-about .about-step[open] .about-step__chev {
  transform: rotate(-135deg);
}

.page-about .about-step__body {
  padding: 0 0 clamp(16px, 2.2vw, 22px) 30px;
}

.page-about .about-step__body p {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.84;
  color: var(--ink-70);
}

/* ---- 数据与纠错 ---- */
.page-about .about-notes {
  list-style: none;
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 2.8vw, 30px);
}

.page-about .about-note {
  padding-left: clamp(14px, 2vw, 20px);
  border-left: 2px solid var(--court-mid);
}

.page-about .about-note__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .about-note__desc {
  margin: 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.84;
  color: var(--ink-70);
}

.page-about .about-note__desc a,
.page-about .about-closing a {
  color: var(--score-yellow);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 209, 102, .4);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-note__desc a:hover,
.page-about .about-note__desc a:focus-visible,
.page-about .about-closing a:hover,
.page-about .about-closing a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.page-about .about-closing {
  margin: clamp(30px, 4vw, 48px) 0 0;
  padding-top: clamp(20px, 2.6vw, 28px);
  border-top: 1px solid var(--hair);
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.86;
  color: var(--ink-70);
}

/* ---- 无障碍与动效克减 ---- */
.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--score-yellow);
  outline-offset: 3px;
}

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

  .page-about .about-step__chev,
  .page-about .about-role,
  .page-about .about-rail__link {
    transition: none;
  }
}
<<<END>>>

.page-about {
  --fill: currentColor;
}