.page-about {
  --about-rail-w: 208px;
  --about-rail-gap: 48px;
  --about-sec-space: 64px;
  background: var(--mist);
  color: var(--on-light);
}

/* ---------- 报头区 ---------- */
.page-about .about-head {
  padding: 36px 0 44px;
  border-bottom: 1px solid var(--line-on-light);
}

.page-about .about-head .breadcrumb {
  margin-bottom: 26px;
}

.page-about .about-head__current {
  color: rgba(14, 21, 18, .6);
}

.page-about .about-head h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 6vw, 58px);
  line-height: 1.1;
  letter-spacing: -.02em;
  margin: 14px 0 22px;
  max-width: 16em;
}

.page-about .about-head__lede {
  font-size: 17px;
  line-height: 1.8;
  margin: 0;
  max-width: 42em;
  color: rgba(14, 21, 18, .82);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 40px 0 0;
  background: var(--line-on-light);
  border-top: 1px solid var(--line-on-light);
  border-bottom: 1px solid var(--line-on-light);
}

@media (min-width: 760px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-facts__item {
  background: var(--mist);
  padding: 16px 18px;
}

.page-about .about-facts dt {
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(14, 21, 18, .55);
  margin: 0 0 8px;
}

.page-about .about-facts dd {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  margin: 0;
  color: var(--green);
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-top: 40px;
  padding-bottom: 88px;
}

@media (min-width: 900px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-rail-gap);
  }
}

/* ---------- 左侧章节索引 ---------- */
.page-about .about-rail {
  border-top: 2px solid var(--zhu);
  padding-top: 14px;
}

@media (min-width: 900px) {
  .page-about .about-rail {
    position: sticky;
    top: 24px;
    align-self: start;
  }
}

.page-about .about-rail__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: rgba(14, 21, 18, .45);
  margin: 0 0 12px;
  text-transform: uppercase;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--jin) transparent;
}

.page-about .about-rail__item {
  flex: 0 0 auto;
}

@media (min-width: 900px) {
  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__item {
    flex: 0 0 auto;
    width: 100%;
  }
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  font-size: 14px;
  line-height: 1.45;
  color: rgba(14, 21, 18, .58);
  text-decoration: none;
  border-left: 3px solid transparent;
  border-bottom: 1px solid var(--line-on-light);
  white-space: nowrap;
  transition: color var(--t), border-color var(--t), background var(--t);
}

@media (min-width: 900px) {
  .page-about .about-rail__link {
    white-space: normal;
    padding: 10px 12px;
  }
}

.page-about .about-rail__link:hover {
  color: var(--on-light);
  border-left-color: var(--jin);
  background: rgba(200, 162, 74, .1);
}

.page-about .about-rail__link[aria-current="true"] {
  color: var(--zhu);
  border-left-color: var(--zhu);
  background: rgba(193, 39, 45, .07);
}

.page-about .about-rail__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--jin);
  flex: 0 0 auto;
}

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

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding-bottom: var(--about-sec-space);
  margin-bottom: var(--about-sec-space);
  border-bottom: 1px solid var(--line-on-light);
  scroll-margin-top: 28px;
}

.page-about .about-body > .about-sec:last-child {
  border-bottom: 0;
  margin-bottom: 0;
}

.page-about .about-sec__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--zhu);
  margin: 0 0 12px;
}

.page-about .about-sec__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 3.4vw, 32px);
  line-height: 1.22;
  letter-spacing: -.01em;
  margin: 0 0 22px;
  max-width: 20em;
}

.page-about .about-sec p {
  font-size: 16px;
  line-height: 1.8;
  margin: 0 0 16px;
  max-width: 44em;
  color: rgba(14, 21, 18, .84);
}

.page-about .about-lede {
  border-left: 3px solid var(--jin);
  padding-left: 18px;
  margin: 0 0 30px;
}

.page-about .about-lede p {
  font-size: 17px;
  line-height: 1.82;
  margin: 0;
  color: rgba(14, 21, 18, .88);
}

.page-about .about-tail {
  margin-top: 22px;
  font-size: 15px;
  color: rgba(14, 21, 18, .7);
}

/* ---------- 三段记录 ---------- */
.page-about .record-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-on-light);
  border-top: 1px solid var(--line-on-light);
  border-bottom: 1px solid var(--line-on-light);
}

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

.page-about .record-list li {
  background: var(--mist);
  padding: 24px 20px 22px;
  transition: background var(--t);
}

.page-about .record-list li:hover {
  background: rgba(200, 162, 74, .12);
}

.page-about .record-list h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 10px;
}

.page-about .record-list h3::before {
  content: "";
  display: block;
  width: 22px;
  height: 3px;
  background: var(--zhu);
  margin-bottom: 12px;
}

.page-about .record-list p {
  font-size: 15px;
  line-height: 1.75;
  margin: 0;
  color: rgba(14, 21, 18, .78);
}

/* ---------- 赛线并行 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 40px;
  }
}

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

/* ---------- 赛季时间线 ---------- */
.page-about .season-line {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .season-line__item {
  position: relative;
  padding: 0 0 30px 26px;
  border-left: 1px solid var(--line-on-light);
}

.page-about .season-line__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .season-line__mark {
  position: absolute;
  left: -6px;
  top: 6px;
  width: 11px;
  height: 11px;
  background: var(--green);
  transition: background var(--t), transform var(--t);
}

.page-about .season-line__item:hover .season-line__mark,
.page-about .season-line__item:focus-within .season-line__mark {
  background: var(--zhu);
  transform: scale(1.3);
}

.page-about .season-line__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--zhu);
  margin: 0 0 6px;
}

.page-about .season-line__card h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 8px;
}

.page-about .season-line__card p {
  font-size: 15px;
  line-height: 1.75;
  margin: 0;
  color: rgba(14, 21, 18, .78);
}

.page-about .season-line__extra {
  font-size: 14px;
  color: rgba(14, 21, 18, .55);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height .18s ease-out, opacity .18s linear, margin .18s linear;
}

@media (hover: none) {
  .page-about .season-line__extra {
    max-height: 8em;
    opacity: 1;
    margin-top: 8px;
  }
}

@media (hover: hover) {
  .page-about .season-line__item:hover .season-line__extra,
  .page-about .season-line__item:focus-within .season-line__extra {
    max-height: 8em;
    opacity: 1;
    margin-top: 8px;
  }
}

/* ---------- 深色数据生产区 ---------- */
.page-about .about-sec--deep {
  background: var(--green);
  color: var(--on-dark);
  padding: 32px 22px 34px;
  border-bottom: 0;
}

@media (min-width: 760px) {
  .page-about .about-sec--deep {
    padding: 38px 32px 40px;
  }
}

.page-about .about-sec--deep .about-sec__no {
  color: var(--jin);
}

.page-about .about-sec--deep .about-sec__title {
  color: var(--on-dark);
}

.page-about .about-sec--deep p {
  color: rgba(243, 239, 230, .82);
}

.page-about .about-sec--deep .about-lede {
  border-left-color: var(--jin);
}

.page-about .about-sec--deep .about-lede p {
  color: rgba(243, 239, 230, .9);
}

.page-about .about-sec--deep .link-underline {
  color: var(--jin-light);
}

.page-about .about-flow-figure {
  margin: 0 0 30px;
}

/* ---------- 流程节点 ---------- */
.page-about .flow {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px 20px;
}

@media (min-width: 720px) {
  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px 24px;
  }
}

.page-about .flow__step {
  border-top: 1px solid var(--line-on-dark);
  padding-top: 14px;
}

.page-about .flow__link {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: color var(--t);
}

.page-about .flow__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  color: var(--jin);
  margin-bottom: 10px;
  transition: color var(--t);
}

.page-about .flow__name {
  display: block;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--on-dark);
}

.page-about .flow__link:hover .flow__no {
  color: var(--heat);
}

.page-about .flow__link:hover .flow__name {
  color: var(--jin-light);
}

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

@media (min-width: 720px) {
  .page-about .flow-detail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 32px;
  }
}

.page-about .flow-detail article {
  border-top: 1px solid var(--line-on-dark);
  padding: 16px 0 14px;
  scroll-margin-top: 24px;
  transition: border-color var(--t);
}

.page-about .flow-detail article:target {
  border-top-color: var(--jin);
}

.page-about .flow-detail h3 {
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--jin-light);
  letter-spacing: .02em;
}

.page-about .flow-detail p {
  font-size: 14px;
  line-height: 1.75;
  margin: 0;
  color: rgba(243, 239, 230, .76);
}

.page-about .about-flow-chart {
  margin: 30px 0 0;
  max-width: 420px;
}

/* ---------- 团队数字 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 30px;
  background: var(--line-on-light);
  border-top: 1px solid var(--line-on-light);
  border-bottom: 1px solid var(--line-on-light);
}

@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-stats .stat {
  background: var(--mist);
  display: block;
  padding: 24px 20px;
}

.page-about .about-stats .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--green);
  margin-bottom: 10px;
}

.page-about .about-stats .stat__label {
  display: block;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(14, 21, 18, .62);
}

/* ---------- 使用场景 ---------- */
.page-about .use-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-on-light);
  border: 1px solid var(--line-on-light);
}

@media (min-width: 760px) {
  .page-about .use-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .use-grid li {
  background: var(--mist);
  padding: 24px 22px;
  transition: background var(--t);
}

.page-about .use-grid li:hover {
  background: rgba(15, 59, 51, .06);
}

.page-about .use-grid h3 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 10px;
}

.page-about .use-grid__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--zhu);
  flex: 0 0 auto;
}

.page-about .use-grid p {
  font-size: 15px;
  line-height: 1.75;
  margin: 0;
  color: rgba(14, 21, 18, .78);
}

/* ---------- 合作 ---------- */
.page-about .partner-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

@media (min-width: 760px) {
  .page-about .partner-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }
}

.page-about .partner-list li {
  border-top: 3px solid var(--zhu);
  padding-top: 16px;
}

.page-about .partner-list h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 10px;
}

.page-about .partner-list p {
  font-size: 15px;
  line-height: 1.75;
  margin: 0;
  color: rgba(14, 21, 18, .78);
}

/* ---------- 联系 ---------- */
.page-about .about-sec--contact {
  background: var(--night);
  color: var(--on-dark);
  padding: 34px 22px 36px;
  border-bottom: 0;
}

@media (min-width: 760px) {
  .page-about .about-sec--contact {
    padding: 40px 32px 42px;
  }
}

.page-about .about-sec--contact .about-sec__no {
  color: var(--jin);
}

.page-about .about-sec--contact .about-sec__title {
  color: var(--on-dark);
}

.page-about .about-sec--contact p {
  color: rgba(243, 239, 230, .82);
}

.page-about .contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 28px 0 0;
  background: var(--line-on-dark);
  border-top: 1px solid var(--line-on-dark);
  border-bottom: 1px solid var(--line-on-dark);
}

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

.page-about .contact-grid__item {
  background: var(--night);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .contact-grid__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--jin);
}

.page-about .contact-grid__v {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.5;
  color: var(--on-dark);
  word-break: break-word;
}

.page-about .copy-btn {
  align-self: flex-start;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1;
  padding: 8px 13px;
  background: transparent;
  border: 1px solid var(--line-on-dark);
  color: var(--jin-light);
  cursor: pointer;
  transition: background var(--t), color var(--t), border-color var(--t);
}

.page-about .copy-btn:hover {
  background: rgba(200, 162, 74, .16);
  border-color: var(--jin);
}

.page-about .copy-btn.is-copied {
  color: var(--night);
  background: var(--jin);
  border-color: var(--jin);
}

.page-about .about-contact-note {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(243, 239, 230, .68);
}

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

/* ---------- 图片容器 ---------- */
.page-about .figure-frame {
  margin: 0;
}

.page-about .figure-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .figure-frame__caption {
  font-size: 13px;
  line-height: 1.65;
  color: rgba(14, 21, 18, .58);
  margin-top: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--paper);
}

.page-about .about-sec--deep .figure-frame__caption {
  color: rgba(243, 239, 230, .64);
  border-left-color: var(--jin);
}
<<<END>>>