/* ===== page-about · 团队与文化 ===== */
.page-about {
  --ab-rule: rgba(28, 59, 90, .14);
  --ab-teal-wash: rgba(18, 211, 192, .09);
  --ab-gold-wash: rgba(201, 147, 47, .12);
  --ab-violet-wash: rgba(142, 123, 181, .12);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(20px, 4vw, 36px);
  padding-bottom: clamp(32px, 6vw, 68px);
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(20px, 4vw, 36px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 5vw, 52px);
  align-items: center;
}

.page-about .about-hero__kicker {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-lake);
  background: var(--ab-teal-wash);
  border: 1px solid rgba(18, 211, 192, .34);
  border-radius: 3px;
  padding: 5px 11px;
}

.page-about .about-hero h1 {
  margin: 18px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 5.6vw, 46px);
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--c-indigo);
  max-width: 15em;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin-top: 18px;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--c-text);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.5vw, 30px);
}

.page-about .about-hero__visual {
  margin: 0;
  position: relative;
  border: 1px solid var(--ab-rule);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-paper);
  background: linear-gradient(160deg, rgba(46, 127, 168, .16), rgba(201, 147, 47, .12));
}

.page-about .about-hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(180deg, rgba(247, 243, 234, .10) 0 2px, transparent 2px 6px);
  pointer-events: none;
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-hero__stats {
  margin-top: clamp(30px, 5vw, 50px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid rgba(28, 59, 90, .28);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .about-stat__num {
  font-family: var(--font-data);
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: .01em;
  color: var(--c-indigo);
  display: flex;
  align-items: baseline;
  gap: 2px;
}

.page-about .about-stat__unit {
  font-size: .5em;
  font-weight: 500;
  color: var(--c-gold);
  letter-spacing: 0;
}

.page-about .about-stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-stone);
}

/* ---------- 为什么做这件事 ---------- */
.page-about .about-story {
  border-top: 1px solid var(--ab-rule);
}

.page-about .about-story__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 40px);
}

.page-about .about-story__rail {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-about .about-story__rail-note {
  font-size: 11px;
  line-height: 1.35;
  letter-spacing: .18em;
  color: var(--c-lotus);
}

.page-about .about-story__main h2 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 3.8vw, 34px);
  line-height: 1.24;
  letter-spacing: -.02em;
  color: var(--c-indigo);
  max-width: 18em;
}

.page-about .about-story__main .prose p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-text);
}

.page-about .about-story__link {
  margin: 20px 0 0;
}

@media (min-width: 880px) {
  .page-about .about-story__grid {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }
  .page-about .about-story__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    position: sticky;
    top: 96px;
    align-self: start;
  }
}

/* ---------- 团队分工 ---------- */
.page-about .about-roles {
  border-top: 1px solid var(--ab-rule);
}

.page-about .about-roles__lede {
  margin: 0 0 clamp(22px, 4vw, 34px);
  max-width: 44em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-text);
}

.page-about .role-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .role-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 22px 22px;
  background: #fff;
  border: 1px solid var(--ab-rule);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-paper);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .role-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--c-cyan), rgba(18, 211, 192, 0));
}

.page-about .role-card:nth-child(2)::before {
  background: linear-gradient(90deg, var(--c-lake), rgba(46, 127, 168, 0));
}

.page-about .role-card:nth-child(3)::before {
  background: linear-gradient(90deg, var(--c-lotus), rgba(142, 123, 181, 0));
}

.page-about .role-card:nth-child(4)::before {
  background: linear-gradient(90deg, var(--c-gold), rgba(201, 147, 47, 0));
}

.page-about .role-card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.page-about .role-card__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -.01em;
  color: var(--c-indigo);
}

.page-about .role-card__count {
  font-family: var(--font-data);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-gold);
  line-height: 1;
  flex: none;
}

.page-about .role-card__count::after {
  content: "人";
  font-size: .5em;
  color: var(--c-stone);
  margin-left: 2px;
}

.page-about .role-card__duty {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-text);
}

@media (hover: hover) and (pointer: fine) {
  .page-about .role-card:hover,
  .page-about .role-card:focus-within {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lift);
    border-color: rgba(18, 211, 192, .48);
  }
}

@media (min-width: 620px) {
  .page-about .role-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .role-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 横向主题带 ---------- */
.page-about .about-band {
  margin-block: clamp(28px, 5vw, 46px);
}

.page-about .about-band__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
}

.page-about .about-band__text {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(16px, 2.2vw, 21px);
  line-height: 1.5;
  letter-spacing: -.01em;
}

/* ---------- 赛季节奏 ---------- */
.page-about .about-season {
  border-top: 1px solid var(--ab-rule);
}

.page-about .about-season__visual {
  position: relative;
  margin: 0 0 clamp(22px, 4vw, 34px);
  border: 1px solid var(--ab-rule);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-paper);
  background: linear-gradient(90deg, rgba(18, 211, 192, .14), rgba(46, 127, 168, .10), rgba(242, 163, 60, .14));
}

.page-about .about-season__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 3;
  object-fit: cover;
}

.page-about .about-season__visual .media-frame__caption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  background: rgba(15, 32, 39, .74);
  color: var(--c-paper);
  font-size: 11px;
  letter-spacing: .08em;
  padding: 5px 10px;
  border-radius: 3px;
}

.page-about .season-folds {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .season-fold {
  background: #fff;
  border: 1px solid var(--ab-rule);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-paper);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .season-fold[open] {
  border-color: rgba(18, 211, 192, .46);
  box-shadow: 0 1px 0 rgba(28, 59, 90, .10), 7px 7px 0 var(--ab-teal-wash);
}

.page-about .season-fold summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

.page-about .season-fold summary::-webkit-details-marker {
  display: none;
}

.page-about .season-fold__num {
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--c-cyan);
  background: var(--ab-teal-wash);
  border-radius: 3px;
  padding: 3px 8px;
  flex: none;
}

.page-about .season-fold:nth-child(2) .season-fold__num {
  color: #1d6f8e;
  background: rgba(46, 127, 168, .13);
}

.page-about .season-fold:nth-child(3) .season-fold__num {
  color: #6c5a94;
  background: var(--ab-violet-wash);
}

.page-about .season-fold:nth-child(4) .season-fold__num {
  color: #9a6f1c;
  background: var(--ab-gold-wash);
}

.page-about .season-fold__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -.01em;
  color: var(--c-indigo);
}

.page-about .season-fold__hint {
  font-size: 13px;
  color: var(--c-stone);
  margin-left: auto;
}

.page-about .season-fold .fold__body {
  padding: 0 20px 20px;
}

.page-about .season-fold .fold__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-text);
  border-top: 1px dashed rgba(28, 59, 90, .22);
  padding-top: 16px;
}

@media (min-width: 860px) {
  .page-about .season-folds {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

/* ---------- 历程时间线 ---------- */
.page-about .about-history {
  border-top: 1px solid var(--ab-rule);
}

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 30px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-cyan), var(--c-lake) 46%, var(--c-lotus) 72%, var(--c-gold));
  opacity: .55;
}

.page-about .timeline-item {
  position: relative;
  padding-bottom: clamp(22px, 3.6vw, 32px);
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 7px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-paper);
  border: 2px solid var(--c-lake);
  box-sizing: border-box;
}

.page-about .timeline-item:first-child::before {
  border-color: var(--c-cyan);
  background: var(--c-cyan);
}

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

.page-about .timeline-item:last-child::before {
  border-color: var(--c-gold);
  background: var(--c-gold);
}

.page-about .timeline-item__year {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--c-indigo);
  background: var(--c-mist);
  border-radius: 3px;
  padding: 3px 9px;
  margin-bottom: 10px;
}

.page-about .timeline-item__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 20px);
  letter-spacing: -.01em;
  color: var(--c-indigo);
}

.page-about .timeline-item__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-text);
}

@media (min-width: 900px) {
  .page-about .timeline {
    padding-left: 0;
  }
  .page-about .timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }
  .page-about .timeline-item {
    width: calc(50% - 34px);
    padding-bottom: clamp(26px, 3.6vw, 40px);
  }
  .page-about .timeline-item::before {
    left: auto;
    right: -42px;
  }
  .page-about .timeline-item:nth-child(even) {
    margin-left: auto;
    text-align: left;
  }
  .page-about .timeline-item:nth-child(even)::before {
    left: -42px;
    right: auto;
  }
}

/* ---------- 坚持原则 ---------- */
.page-about .about-principles {
  border-top: 1px solid var(--ab-rule);
}

.page-about .principles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .principle {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 22px 24px;
  background: #fff;
  border: 1px solid var(--ab-rule);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-paper);
  overflow: hidden;
}

.page-about .principle::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -30px;
  width: 116px;
  height: 116px;
  border-radius: 50%;
  background: var(--ab-teal-wash);
  pointer-events: none;
}

.page-about .principle:nth-child(2)::after {
  background: var(--ab-violet-wash);
}

.page-about .principle:nth-child(3)::after {
  background: var(--ab-gold-wash);
}

.page-about .principle__no {
  position: relative;
  z-index: 1;
  font-family: var(--font-data);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: rgba(18, 211, 192, .78);
}

.page-about .principle:nth-child(2) .principle__no {
  color: rgba(142, 123, 181, .82);
}

.page-about .principle:nth-child(3) .principle__no {
  color: rgba(201, 147, 47, .88);
}

.page-about .principle__title {
  position: relative;
  z-index: 1;
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -.01em;
  color: var(--c-indigo);
}

.page-about .principle p {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-text);
}

@media (min-width: 820px) {
  .page-about .principles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

/* ---------- 合作与开放 ---------- */
.page-about .about-open {
  border-top: 1px solid var(--ab-rule);
}

.page-about .about-open__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 5vw, 48px);
  align-items: start;
}

.page-about .section-head--solo {
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-about .about-open__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-open__list li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  background: #fff;
  border: 1px solid var(--ab-rule);
  border-left: 3px solid var(--c-lake);
  border-radius: var(--radius-card);
}

.page-about .about-open__list li:nth-child(2) {
  border-left-color: var(--c-lotus);
}

.page-about .about-open__list li:nth-child(3) {
  border-left-color: var(--c-gold);
}

.page-about .about-open__num {
  font-family: var(--font-data);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--c-indigo);
  line-height: 1.3;
}

.page-about .about-open__list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-text);
}

.page-about .about-open__cta {
  margin: clamp(20px, 3.4vw, 28px) 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-open__visual {
  position: relative;
  margin: 0;
  border: 1px solid var(--ab-rule);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-paper);
  background: linear-gradient(150deg, rgba(201, 147, 47, .20), rgba(28, 59, 90, .18));
}

.page-about .about-open__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-about .about-open__visual .media-frame__caption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  background: rgba(15, 32, 39, .74);
  color: var(--c-paper);
  font-size: 11px;
  letter-spacing: .08em;
  padding: 5px 10px;
  border-radius: 3px;
}

@media (min-width: 960px) {
  .page-about .about-open__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: clamp(32px, 5vw, 60px);
  }
  .page-about .about-open__visual {
    position: sticky;
    top: 104px;
  }
}

/* ---------- 窄屏兜底 ---------- */
@media (max-width: 420px) {
  .page-about .about-stat__num {
    font-size: 22px;
  }
  .page-about .about-open__list li {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .page-about .season-fold__hint {
    margin-left: 0;
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role-card,
  .page-about .season-fold {
    transition: none;
  }
  .page-about .role-card:hover,
  .page-about .role-card:focus-within {
    transform: none;
  }
}