.page-about {
  --about-radius: var(--radius);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 26px;
  padding: 32px 0 42px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--amber);
  text-transform: uppercase;
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  font-size: clamp(28px, 6.4vw, 52px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -.015em;
  color: var(--cream);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--stone);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 0;
  border: 1px solid var(--line);
  background: var(--line-soft);
}

.page-about .about-hero__stat {
  background: var(--ink-2);
  padding: 14px 16px 16px;
}

.page-about .about-hero__stat dt {
  margin: 0 0 7px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--stone);
}

.page-about .about-hero__stat dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .about-hero__num {
  font-size: 22px;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: -.01em;
}

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

.page-about .about-hero__media {
  margin: 0;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--ink-2);
}

/* ---------- 主体双栏 ---------- */
.page-about .about-body {
  display: grid;
  gap: 34px;
  padding: 34px 0 64px;
}

.page-about .about-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--stone);
}

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

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--ink-2);
  color: var(--stone);
  font-size: 13px;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan-line);
}

.page-about .about-index__num {
  font-size: 11px;
  color: var(--amber);
  letter-spacing: .06em;
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  margin: 0 0 54px;
  scroll-margin-top: 96px;
}

.page-about .about-sec:last-of-type {
  margin-bottom: 44px;
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-sec__num {
  flex: none;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--amber);
}

.page-about .about-sec__title {
  margin: 0;
  font-size: clamp(20px, 3.6vw, 28px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .about-sec__lead {
  margin: 0 0 22px;
  padding-left: 16px;
  border-left: 2px solid var(--cyan);
  font-size: 17px;
  line-height: 1.8;
  color: var(--cream);
}

.page-about .about-sec__body > p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--stone);
}

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

.page-about .about-sec__body strong.num {
  color: var(--cream);
  font-weight: 600;
}

/* ---------- 五类档案字段 ---------- */
.page-about .about-fields {
  display: grid;
  gap: 14px;
  margin-bottom: 24px;
}

.page-about .about-field {
  position: relative;
  padding: 20px 18px 16px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--ink-2);
  --about-accent: var(--cyan);
}

.page-about .about-field--moss { --about-accent: var(--moss); }
.page-about .about-field--amber { --about-accent: var(--amber); }
.page-about .about-field--clay { --about-accent: var(--clay); }

.page-about .about-field::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 2px;
  background: var(--about-accent);
  opacity: .8;
  border-radius: var(--about-radius) var(--about-radius) 0 0;
}

.page-about .about-field__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .about-field__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  font-size: 11px;
  color: var(--ink);
  background: var(--about-accent);
  border-radius: 2px;
}

.page-about .about-field__title {
  margin: 0;
  font-size: 19px;
  font-weight: 600;
  color: var(--cream);
}

.page-about .about-field__note {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
}

.page-about .about-field__dl {
  margin: 0;
}

.page-about .about-field__row {
  display: grid;
  grid-template-columns: minmax(0, 92px) minmax(0, 1fr);
  gap: 10px;
  padding: 8px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-field__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--cyan-soft);
}

.page-about .about-field__row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--stone);
}

/* ---------- 通用插图 ---------- */
.page-about .about-figure {
  margin: 26px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--ink-2);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 三步流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-flow__step {
  position: relative;
  padding: 0 0 24px 26px;
  border-left: 1px solid var(--line);
}

.page-about .about-flow__step::after {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 240, 200, .12);
}

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

.page-about .about-flow__stepnum {
  display: block;
  margin-bottom: 8px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-about .about-flow__steptitle {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--cream);
}

.page-about .about-flow__steptext {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 赛季轴 ---------- */
.page-about .about-timeline {
  display: flex;
  gap: 10px;
  margin: 22px 0 22px;
  padding: 4px 2px 14px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
}

.page-about .about-timeline__item {
  flex: 0 0 auto;
  scroll-snap-align: start;
  min-width: 108px;
  padding: 14px 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--ink-2);
}

.page-about .about-timeline__item:last-child {
  border-color: var(--cyan-line);
  background: linear-gradient(180deg, rgba(53, 240, 200, .09), rgba(18, 48, 40, 0) 70%), var(--ink-2);
}

.page-about .about-timeline__year {
  display: block;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-about .about-timeline__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--stone);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team {
  display: grid;
  gap: 14px;
}

.page-about .about-team__item {
  padding: 20px 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--ink-2);
}

.page-about .about-team__figure {
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin: 0 0 10px;
}

.page-about .about-team__num {
  font-size: 38px;
  line-height: 1;
  font-weight: 600;
  letter-spacing: -.03em;
  color: var(--cyan);
}

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

.page-about .about-team__role {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--cream);
}

.page-about .about-team__desc {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin: 0 0 12px;
  padding: 28px 20px 26px;
  border: 1px solid var(--cyan-line);
  border-radius: var(--about-radius);
  background: linear-gradient(140deg, rgba(53, 240, 200, .10), rgba(11, 31, 26, 0) 64%), var(--ink-2);
}

.page-about .about-cta__kicker {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--amber);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-size: clamp(20px, 3.6vw, 26px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .about-cta__text {
  margin: 0 0 20px;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

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

.page-about .about-cta__links li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.6;
}

.page-about .about-cta__links li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 1px;
  background: var(--cyan);
}

.page-about .about-cta__links a {
  color: var(--stone);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-cta__links a:hover,
.page-about .about-cta__links a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan-line);
}

/* ---------- 窄屏细节 ---------- */
@media (max-width: 400px) {
  .page-about .about-field__row {
    grid-template-columns: minmax(0, 78px) minmax(0, 1fr);
    gap: 8px;
  }

  .page-about .about-hero__stat {
    padding: 12px 12px 14px;
  }
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-cta {
    padding: 36px 32px 32px;
  }
}

@media (min-width: 760px) {
  .page-about .about-fields {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

/* ---------- 流程横向化 ---------- */
@media (min-width: 820px) {
  .page-about .about-flow {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-flow__step {
    padding: 34px 28px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line-strong);
  }

  .page-about .about-flow__step::after {
    left: 0;
    top: -5px;
  }

  .page-about .about-flow__step:last-child {
    padding-right: 0;
  }
}

/* ---------- 桌面双栏 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: 52px;
    align-items: center;
    padding: 48px 0 56px;
  }

  .page-about .about-hero__lede {
    font-size: 17px;
  }
}

@media (min-width: 1040px) {
  .page-about .about-body {
    grid-template-columns: 182px minmax(0, 1fr);
    gap: 60px;
    padding: 48px 0 80px;
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-index__list {
    display: block;
    padding: 0;
    overflow: visible;
  }

  .page-about .about-index__list li + li {
    margin-top: 2px;
  }

  .page-about .about-index__link {
    display: flex;
    width: 100%;
    box-sizing: border-box;
    padding: 9px 0 9px 14px;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    background: transparent;
    font-size: 14px;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-left-color: var(--cyan-line);
    background: transparent;
  }

  .page-about .about-index__link[aria-current="true"] {
    color: var(--cyan);
    border-left-color: var(--cyan);
    background: linear-gradient(90deg, rgba(53, 240, 200, .10), rgba(11, 31, 26, 0) 92%);
  }

  .page-about .about-sec {
    margin-bottom: 64px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-timeline__item {
    min-width: 118px;
  }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-cta__links a {
    transition: color .01ms linear, border-color .01ms linear, background-color .01ms linear;
  }
}