.page-about {
  background: var(--cream);
  color: var(--charcoal);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about .about-link {
  color: var(--ink-deep);
  text-decoration: underline;
  text-decoration-color: var(--flame);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-about .about-link:hover {
  color: var(--flame);
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  background:
    radial-gradient(120% 130% at 88% 6%, rgba(255, 122, 47, .22) 0%, rgba(255, 122, 47, 0) 46%),
    linear-gradient(160deg, var(--ink-deep) 0%, var(--ink-mid) 62%, #16455C 100%);
  color: var(--cream);
  padding-top: clamp(28px, 4.4vw, 52px);
  padding-bottom: clamp(44px, 6vw, 76px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 179, 122, .55), transparent);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-about .about-hero__copy {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 1.6vw, 18px);
}

.page-about .about-hero .breadcrumbs {
  color: var(--mist);
  font-size: 13px;
  letter-spacing: .04em;
  margin-bottom: 2px;
}

.page-about .about-hero .breadcrumbs a {
  color: var(--sand);
}

.page-about .about-hero .breadcrumbs a:hover {
  color: var(--flame-soft);
}

.page-about .about-hero .eyebrow {
  color: var(--flame);
  font-size: 13px;
  letter-spacing: .1em;
  font-weight: 700;
}

.page-about .about-hero h1 {
  font-size: clamp(28px, 4.2vw, 52px);
  line-height: 1.12;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--cream);
  margin: 0;
  max-width: 22ch;
}

.page-about .about-hero__lead {
  margin: 0;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.8;
  color: rgba(246, 243, 236, .86);
  max-width: 56ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.page-about .about-hero__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--ink-line);
  box-shadow: var(--shadow-card);
  position: relative;
}

.page-about .about-hero__media::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(14, 42, 56, 0) 46%, rgba(14, 42, 56, .62) 100%);
  z-index: 1;
  pointer-events: none;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

/* ============ 主体区 ============ */
.page-about .about-body {
  padding-top: clamp(40px, 6vw, 78px);
  padding-bottom: clamp(52px, 7vw, 96px);
}

.page-about .about-flow {
  display: grid;
  gap: clamp(44px, 6vw, 86px);
  min-width: 0;
}

/* ============ 章节索引 ============ */
.page-about .about-index {
  min-width: 0;
}

.page-about .about-index .section-index__title {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--ink-line);
  margin-bottom: 10px;
}

.page-about .about-index .section-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.page-about .about-index .section-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-mid);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-index .section-index__link:hover {
  color: var(--flame);
  border-bottom-color: var(--flame);
}

.page-about .about-index .section-index__link[data-active],
.page-about .about-index li[data-active] .section-index__link,
.page-about .about-index .section-index__link[aria-current="true"] {
  color: var(--ink-deep);
  font-weight: 700;
  border-bottom-color: var(--flame);
}

.page-about .about-index__num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--flame);
  flex: none;
}

/* ============ 章节通用 ============ */
.page-about .about-section {
  scroll-margin-top: 120px;
  position: relative;
}

.page-about .about-section + .about-section {
  border-top: 1px solid rgba(30, 85, 104, .18);
  padding-top: clamp(36px, 5vw, 66px);
}

.page-about .about-section + .about-section::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  width: 84px;
  height: 13px;
  border-top: 1px solid var(--flame);
  border-radius: 50%;
  opacity: .55;
}

.page-about .about-section__head {
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-about .about-section .eyebrow {
  color: var(--ink-line);
  font-size: 12px;
  letter-spacing: .16em;
  font-weight: 700;
  margin: 0 0 8px;
}

.page-about .about-section h2 {
  margin: 0;
  font-size: clamp(23px, 2.9vw, 38px);
  line-height: 1.2;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--ink-deep);
  max-width: 24ch;
}

.page-about .about-section__lead {
  margin: 0;
  font-size: clamp(16px, 1.15vw, 17px);
  line-height: 1.85;
  color: var(--charcoal);
  max-width: 66ch;
}

.page-about .about-section__text {
  margin: 16px 0 0;
  font-size: clamp(15px, 1.1vw, 16.5px);
  line-height: 1.85;
  color: #26313a;
  max-width: 68ch;
}

/* ============ 起点的事实清单 ============ */
.page-about .about-factlist {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(30, 85, 104, .16);
  border: 1px solid rgba(30, 85, 104, .16);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-factlist li {
  background: #fff;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  align-items: baseline;
  padding: 14px 18px;
}

.page-about .about-factlist__key {
  flex: none;
  min-width: 6.5em;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--ink-line);
  font-weight: 700;
}

.page-about .about-factlist__val {
  font-size: 15px;
  line-height: 1.6;
  color: var(--charcoal);
}

/* ============ 流程五步 ============ */
.page-about .about-steps {
  list-style: none;
  margin: clamp(26px, 3.6vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: var(--gap);
}

.page-about .about-step {
  position: relative;
  background: #fff;
  border: 1px solid rgba(30, 85, 104, .16);
  border-radius: var(--radius-md);
  padding: 20px 18px 22px;
  box-shadow: 0 18px 34px -30px rgba(5, 18, 26, .6);
}

.page-about .about-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-pill);
  background: var(--ink-deep);
  color: var(--flame);
  font-family: var(--font-num);
  font-size: 15px;
  letter-spacing: .04em;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  margin-bottom: 12px;
}

.page-about .about-step__title {
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink-deep);
}

.page-about .about-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: #2b3640;
}

.page-about .about-process__figure {
  margin: clamp(26px, 3.6vw, 40px) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(30, 85, 104, .18);
  background: var(--ink-deep);
  position: relative;
}

.page-about .about-process__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  opacity: .92;
}

.page-about .about-process__caption {
  display: block;
  padding: 12px 18px 14px;
  background: var(--ink-mid);
  color: var(--sand);
  font-size: 13.5px;
  line-height: 1.65;
}

/* ============ 三组分工 ============ */
.page-about .about-teams {
  margin-top: clamp(24px, 3.4vw, 38px);
  display: grid;
  gap: var(--gap);
}

.page-about .about-team {
  position: relative;
  border-radius: var(--radius-md);
  padding: 22px 20px 20px;
  background: #fff;
  border: 1px solid rgba(30, 85, 104, .16);
  border-top: 4px solid var(--ink-line);
}

.page-about .about-team--content {
  border-top-color: var(--flame);
}

.page-about .about-team--proof {
  border-top-color: var(--ink-line);
}

.page-about .about-team--support {
  border-top-color: var(--grass);
}

.page-about .about-team__title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink-deep);
}

.page-about .about-team__text {
  margin: 0 0 14px;
  font-size: 14.8px;
  line-height: 1.8;
  color: #2b3640;
}

.page-about .about-team__note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(30, 85, 104, .28);
  font-size: 13px;
  letter-spacing: .03em;
  color: var(--ink-line);
}

/* ============ 数据带 ============ */
.page-about .about-band {
  margin-top: clamp(40px, 5.5vw, 70px);
  background:
    radial-gradient(110% 150% at 92% -10%, rgba(255, 122, 47, .26) 0%, rgba(255, 122, 47, 0) 52%),
    linear-gradient(135deg, var(--ink-deep) 0%, var(--ink-mid) 60%, #16455C 100%);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 4.4vw, 52px) clamp(22px, 3.6vw, 48px);
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  box-shadow: var(--shadow-card);
}

.page-about .about-band__item {
  position: relative;
  padding-top: 16px;
}

.page-about .about-band__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--flame);
}

.page-about .about-band__value {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(38px, 5.4vw, 58px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -.01em;
  font-variant-numeric: tabular-nums;
  color: var(--flame);
}

.page-about .about-band__label {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--sand);
  max-width: 22ch;
}

/* ============ 时间线 ============ */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(26px, 3.6vw, 42px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.4vw, 28px);
}

.page-about .about-timeline__item {
  display: grid;
  gap: 10px;
  align-items: start;
  transition: transform var(--dur) var(--ease);
}

.page-about .about-timeline__year {
  font-family: var(--font-num);
  font-size: clamp(30px, 3.6vw, 42px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: .01em;
  font-variant-numeric: tabular-nums;
  color: var(--ink-deep);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-timeline__year::after {
  content: "";
  width: 22px;
  height: 8px;
  border-top: 2px solid var(--flame);
  border-radius: 50%;
  opacity: .75;
}

.page-about .about-timeline__card {
  background: #fff;
  border: 1px solid rgba(30, 85, 104, .16);
  border-left: 4px solid var(--flame);
  border-radius: var(--radius-md);
  padding: 18px 20px 20px;
  box-shadow: 0 16px 32px -30px rgba(5, 18, 26, .55);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink-deep);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.8;
  color: #2b3640;
}

/* ============ 内容来源 ============ */
.page-about .about-source-grid {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  gap: var(--gap);
}

.page-about .about-source {
  background: rgba(14, 42, 56, .045);
  border: 1px solid rgba(30, 85, 104, .16);
  border-radius: var(--radius-md);
  padding: 18px 18px 20px;
}

.page-about .about-source__title {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--ink-deep);
}

.page-about .about-source__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: #2b3640;
}

/* ============ 赛季专题 ============ */
.page-about .about-seasons {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-seasons__item {
  display: grid;
  gap: 8px;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: #fff;
  border: 1px solid rgba(30, 85, 104, .16);
}

.page-about .about-seasons__item p {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.78;
  color: #2b3640;
}

.page-about .about-seasons__tag {
  justify-self: start;
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(255, 122, 47, .14);
  color: var(--ink-deep);
  font-size: 12.5px;
  letter-spacing: .08em;
  font-weight: 700;
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

  .page-about .about-timeline__item {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 18px;
  }

  .page-about .about-timeline__year {
    padding-top: 12px;
  }
}

@media (min-width: 860px) {
  .page-about .about-timeline__item:nth-child(1) {
    margin-left: 0;
  }

  .page-about .about-timeline__item:nth-child(2) {
    margin-left: 26px;
  }

  .page-about .about-timeline__item:nth-child(3) {
    margin-left: 52px;
  }

  .page-about .about-timeline__item:nth-child(4) {
    margin-left: 78px;
  }

  .page-about .about-timeline__item:nth-child(5) {
    margin-left: 104px;
  }
}

@media (min-width: 961px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: clamp(36px, 4vw, 60px);
  }

  .page-about .about-index {
    position: sticky;
    top: 112px;
    align-self: start;
  }

  .page-about .about-index .section-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
    border-left: 1px solid rgba(30, 85, 104, .22);
  }

  .page-about .about-index .section-index__link {
    display: flex;
    width: 100%;
    padding: 8px 0 8px 14px;
    margin-left: -1px;
    border-left: 2px solid transparent;
    border-bottom: none;
  }

  .page-about .about-index .section-index__link:hover {
    border-left-color: var(--flame);
  }

  .page-about .about-index .section-index__link[data-active],
  .page-about .about-index li[data-active] .section-index__link,
  .page-about .about-index .section-index__link[aria-current="true"] {
    border-left-color: var(--flame);
    border-bottom: none;
  }

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

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

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

  .page-about .about-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .about-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-step + .about-step::before {
    content: "";
    position: absolute;
    top: 37px;
    left: calc(var(--gap) * -1 - 2px);
    width: calc(var(--gap) + 4px);
    height: 2px;
    background: repeating-linear-gradient(90deg, var(--mist) 0 5px, transparent 5px 10px);
  }
}
<<<END>>>