.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: 14px 56px;
  background:
    radial-gradient(120% 90% at 96% -10%, rgba(232, 93, 4, 0.18), transparent 56%),
    radial-gradient(90% 70% at -6% 110%, rgba(20, 224, 196, 0.12), transparent 58%),
    var(--paper);
  overflow: hidden;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin-top: 22px;
}

.page-about .about-hero__copy h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  font-size: clamp(34px, 7.4vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin-top: 20px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-hero__stat {
  flex: 1 1 128px;
  padding: 16px 18px;
  border-radius: var(--r-sm);
  background: rgba(255, 224, 199, 0.72);
  border: 1px solid rgba(232, 93, 4, 0.22);
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  font-weight: 700;
  color: var(--deep);
  line-height: 1;
}

.page-about .about-hero__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--slate);
}

.page-about .about-hero__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(160deg, var(--blue), var(--deep));
  clip-path: polygon(0 2%, 100% 0, 100% 100%, 0 98%);
  box-shadow: var(--shadow-lift);
}

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

/* ---------- 主分屏 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-block: 8px 84px;
}

/* ---------- 章节索引 ---------- */
.page-about .about-rail {
  order: -1;
  min-width: 0;
}

.page-about .about-rail__sticky {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 4px 2px 12px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

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

.page-about .about-rail__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  line-height: 1.2;
  color: var(--deep);
  text-decoration: none;
  white-space: nowrap;
  scroll-snap-align: start;
  transition: background 200ms ease, border-color 200ms ease, transform 200ms ease;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--ink);
  transform: translateY(-1px);
}

.page-about .about-rail__no {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--signal);
}

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

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

/* ---------- 正文列 ---------- */
.page-about .about-body {
  min-width: 0;
}

.page-about .about-chapter {
  padding-block: 8px 48px;
}

.page-about .about-chapter + .about-chapter {
  padding-top: 44px;
  border-top: 1px solid transparent;
  border-image: linear-gradient(90deg, var(--signal), rgba(201, 210, 217, 0.5) 40%, transparent 85%) 1;
}

.page-about .about-chapter--last {
  padding-bottom: 8px;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 20px;
}

.page-about .about-chapter__num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
  flex: 0 0 auto;
}

.page-about .about-chapter__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--deep);
}

.page-about .about-chapter__body > p {
  font-size: 16px;
  line-height: 1.85;
  color: #263238;
  margin: 0 0 18px;
  max-width: 36em;
}

.page-about .about-subhead {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  color: var(--deep);
  margin-top: 26px !important;
}

/* ---------- 台账式数据 ---------- */
.page-about .about-ledger {
  display: grid;
  gap: 12px;
  margin: 24px 0 22px;
}

.page-about .about-ledger__item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  border-radius: var(--r-sm);
  background: var(--sand);
  border-left: 4px solid var(--signal);
}

.page-about .about-ledger__num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  font-weight: 700;
  color: var(--deep);
  line-height: 1;
}

.page-about .about-ledger__txt {
  font-size: 14px;
  line-height: 1.6;
  color: #3b474f;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 26px 0;
  border-radius: var(--r-md);
  overflow: hidden;
  background: linear-gradient(150deg, var(--deep), var(--blue));
}

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

.page-about .about-figure .media__caption {
  padding: 12px 18px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.82);
}

/* ---------- 赛季轨道 ---------- */
.page-about .about-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  gap: 0;
  margin: 26px 0 6px;
  padding: 0 2px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
}

.page-about .about-track__step {
  position: relative;
  padding: 22px 14px 0 0;
  border-top: 2px solid var(--line);
  scroll-snap-align: start;
  min-width: 140px;
}

.page-about .about-track__dot {
  position: absolute;
  top: -7px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 4px rgba(232, 93, 4, 0.16);
}

.page-about .about-track__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  color: var(--deep);
  margin: 0 0 6px;
}

.page-about .about-track__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--slate);
}

/* ---------- 岗位折叠 ---------- */
.page-about .about-roles {
  display: grid;
  gap: 10px;
  margin: 22px 0 8px;
}

.page-about .about-role {
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.8);
  overflow: hidden;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.page-about .about-role[open] {
  border-color: var(--signal);
  box-shadow: var(--shadow-lift);
}

.page-about .about-role__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-role__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 20px;
  line-height: 1;
  color: var(--signal);
  transition: transform 200ms ease;
}

.page-about .about-role[open] .about-role__summary::after {
  content: "−";
}

.page-about .about-role__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  color: var(--deep);
}

.page-about .about-role__hint {
  font-size: 13px;
  color: var(--slate);
}

.page-about .about-role__text {
  margin: 0;
  padding: 0 18px 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: #3b474f;
}

/* ---------- 深色数据面板 ---------- */
.page-about .about-dark {
  margin: 26px 0;
  padding: 26px 22px 24px;
  border-radius: var(--r-lg);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(20, 224, 196, 0.18), transparent 60%),
    linear-gradient(155deg, var(--deep), var(--blue));
  color: #fff;
}

.page-about .about-dark__kicker {
  margin: 0;
  font-family: var(--font-data);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-dark__big {
  margin: 10px 0 0;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(46px, 9vw, 72px);
  font-weight: 700;
  line-height: 1;
  color: #fff;
}

.page-about .about-dark__line {
  margin: 10px 0 18px;
  font-size: 15px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.86);
  max-width: 30em;
}

.page-about .about-dark__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}

.page-about .about-dark__tags li {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(20, 224, 196, 0.45);
  font-size: 12.5px;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .about-dark__foot {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
}

/* ---------- 合作卡片 ---------- */
.page-about .about-coop {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 22px 0;
}

.page-about .about-coop__item {
  padding: 22px 20px;
  border-radius: var(--r-md);
}

.page-about .about-coop__item--sand {
  background: var(--sand);
  border-left: 5px solid var(--signal);
}

.page-about .about-coop__item--blue {
  background: #e8eef2;
  border-left: 5px solid var(--blue);
}

.page-about .about-coop__item--deep {
  background: var(--deep);
  border-left: 5px solid var(--cyan);
}

.page-about .about-coop__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  color: var(--deep);
}

.page-about .about-coop__item--deep .about-coop__title {
  color: #fff;
}

.page-about .about-coop__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: #3b474f;
}

.page-about .about-coop__item--deep .about-coop__text {
  color: rgba(255, 255, 255, 0.82);
}

/* ---------- 继续了解 ---------- */
.page-about .about-next {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-next__link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  transition: border-color 200ms ease, transform 200ms ease, background 200ms ease;
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  border-color: var(--signal);
  background: #fff;
  transform: translateY(-2px);
}

.page-about .about-next__k {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  color: var(--deep);
}

.page-about .about-next__v {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-next__link--signal {
  background: var(--signal);
  border-color: var(--signal);
}

.page-about .about-next__link--signal .about-next__k {
  color: var(--ink);
}

.page-about .about-next__link--signal .about-next__v {
  color: rgba(14, 17, 20, 0.76);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding-block: 18px 72px;
  }

  .page-about .about-hero__stats {
    gap: 16px;
  }

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

  .page-about .about-coop__item--deep {
    grid-column: span 2;
  }

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

  .page-about .about-ledger {
    grid-template-columns: repeat(3, 1fr);
    align-items: stretch;
  }

  .page-about .about-ledger__item {
    grid-template-columns: 1fr;
    align-content: start;
    gap: 10px;
    padding: 18px 16px;
  }

  .page-about .about-dark {
    padding: 34px 34px 30px;
  }
}

/* ---------- 桌面分屏 ---------- */
@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: 48px;
  }

  .page-about .about-hero__media {
    margin-top: -12px;
  }

  .page-about .about-shell {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    align-items: start;
    padding-block: 26px 110px;
  }

  .page-about .about-rail {
    order: 0;
  }

  .page-about .about-rail__sticky {
    position: sticky;
    top: 26px;
    display: block;
    overflow: visible;
    padding: 26px 24px;
    border-radius: var(--r-md);
    background: var(--sand);
    border: 1px solid rgba(232, 93, 4, 0.18);
  }

  .page-about .about-rail__label {
    display: block;
    margin: 0 0 16px;
    font-family: var(--font-data);
    font-size: 12px;
    letter-spacing: 0.14em;
    color: var(--signal);
  }

  .page-about .about-rail__list {
    display: grid;
    gap: 4px;
  }

  .page-about .about-rail__link {
    display: flex;
    width: 100%;
    padding: 10px 12px;
    border: 0;
    border-radius: 10px;
    background: transparent;
    font-size: 14px;
    white-space: normal;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    background: var(--deep);
    color: #fff;
    transform: none;
  }

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

  .page-about .about-rail__note {
    display: block;
    margin-top: 20px;
    padding-top: 18px;
    border-top: 1px solid rgba(11, 42, 34, 0.14);
  }

  .page-about .about-rail__note-k {
    margin: 0;
    font-size: 12.5px;
    color: var(--slate);
  }

  .page-about .about-rail__note-v {
    margin: 6px 0 6px;
    font-family: var(--font-data);
    font-variant-numeric: tabular-nums;
    font-size: 20px;
    font-weight: 700;
    color: var(--deep);
  }

  .page-about .about-rail__note-t {
    margin: 0;
    font-size: 12.5px;
    line-height: 1.65;
    color: var(--slate);
  }

  .page-about .about-chapter {
    padding-block: 10px 60px;
  }

  .page-about .about-chapter + .about-chapter {
    padding-top: 54px;
  }

  .page-about .about-coop {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-coop__item--deep {
    grid-column: auto;
  }

  .page-about .about-next {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .about-role,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-next__link:hover {
    transform: none;
  }
}
<<<END>>>