.page-about {
  --about-gap: clamp(14px, 1.9vw, 22px);
  --about-radius: 18px;
  --about-line: rgba(34, 48, 51, .85);
  --about-soft: rgba(157, 178, 168, .16);
  --team-accent: var(--volt);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: clamp(16px, 2.4vw, 26px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
}

.page-about .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--electric);
  border-bottom-color: var(--electric);
}

.page-about .breadcrumbs [aria-current="page"] {
  color: var(--chalk);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(26px, 4vw, 56px) 0 clamp(42px, 6vw, 84px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -26%;
  right: -14%;
  width: min(760px, 82%);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 32% 32%, rgba(14, 92, 58, .82), rgba(7, 59, 38, .32) 48%, transparent 72%);
  z-index: 0;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(34, 48, 51, .5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(34, 48, 51, .5) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-mask-image: radial-gradient(125% 95% at 18% 0%, #000 0%, transparent 74%);
  mask-image: radial-gradient(125% 95% at 18% 0%, #000 0%, transparent 74%);
  z-index: 0;
  pointer-events: none;
}

.page-about .about-hero__in {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6.3vw, 60px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  max-width: 660px;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 620px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-soft);
  border: 1px solid var(--about-soft);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .about-stat {
  background: var(--panel);
  padding: 17px 18px 19px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.page-about .about-stat__v {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--volt);
}

.page-about .about-stat__k {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mist);
  letter-spacing: .02em;
}

@media (min-width: 900px) {
  .page-about .about-hero__in {
    grid-template-columns: minmax(0, 1.42fr) minmax(300px, .82fr);
    align-items: end;
  }
  .page-about .about-hero__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 区块与标题 ---------- */
.page-about .about-block {
  padding: clamp(42px, 6.5vw, 86px) 0;
}

.page-about .about-block--tint {
  background:
    radial-gradient(120% 72% at 100% 0%, rgba(14, 92, 58, .15) 0%, transparent 62%),
    radial-gradient(90% 60% at 0% 100%, rgba(47, 211, 245, .06) 0%, transparent 60%),
    var(--carbon);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-head {
  position: relative;
  padding-top: 20px;
  margin-bottom: clamp(22px, 3.2vw, 38px);
  display: grid;
  gap: 10px;
  max-width: 780px;
}

.page-about .about-head::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--grid) 0%, var(--grid) 44%, transparent 100%);
}

.page-about .about-head::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 68px;
  height: 3px;
  background: var(--volt);
}

.page-about .about-head__idx {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--volt);
  text-transform: uppercase;
}

.page-about .about-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  margin: 0;
}

.page-about .about-head p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
  max-width: 620px;
}

/* ---------- 卡片网格 ---------- */
.page-about .about-deck {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .about-card {
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 13px;
  padding: clamp(18px, 2.3vw, 26px);
  background: var(--panel);
  border: 1px solid var(--about-soft);
  border-radius: var(--about-radius);
  position: relative;
  min-width: 0;
  transition: border-color var(--t), transform var(--t);
}

.page-about .about-card:hover {
  border-color: rgba(200, 255, 61, .3);
  transform: translateY(-2px);
}

.page-about .about-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.3;
  margin: 0;
  color: var(--chalk);
}

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

.page-about .about-card--focus {
  background: linear-gradient(155deg, var(--pitch-deep) 0%, var(--panel) 64%);
  border-color: rgba(200, 255, 61, .26);
}

.page-about .about-card--focus::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--volt);
}

.page-about .about-card--flag::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--amber), var(--volt) 55%, var(--electric));
}

.page-about .about-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .about-list li {
  position: relative;
  padding-left: 17px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .64em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--electric);
}

.page-about .about-list--roomy {
  gap: 12px;
}

.page-about .about-list--roomy li {
  font-size: 14.5px;
}

.page-about .prose {
  margin: 0 0 18px;
  max-width: 620px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--mist);
}

@media (min-width: 860px) {
  .page-about .about-deck {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
  .page-about .about-cell--4 { grid-column: span 4; }
  .page-about .about-cell--5 { grid-column: span 5; }
  .page-about .about-cell--6 { grid-column: span 6; }
  .page-about .about-cell--7 { grid-column: span 7; }
  .page-about .about-cell--8 { grid-column: span 8; }
}

/* ---------- 赛季时间轴 ---------- */
.page-about .about-seasons__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-about .about-seasons__figure {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--about-soft);
  background: var(--panel);
}

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

.page-about .about-seasons__track {
  position: relative;
  padding-left: 34px;
  min-width: 0;
}

.page-about .about-seasons__track::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 30px;
  bottom: 30px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--volt) 0%, var(--electric) 46%, rgba(34, 48, 51, .95) 100%);
  opacity: .6;
}

@media (min-width: 900px) {
  .page-about .about-seasons__grid {
    grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-seasons__figure img {
    max-height: 620px;
  }
}

@media (max-width: 899px) {
  .page-about .about-seasons__figure img {
    max-height: 340px;
  }
}

/* ---------- 折叠索引通用 ---------- */
.page-about .about-index .accordion-group__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.page-about .about-index__hint {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-index .accordion__item {
  position: relative;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-index .accordion__head {
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 12px;
  padding: 15px 6px 15px 0;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  border-radius: 8px;
  transition: background var(--t-fast);
}

.page-about .about-index .accordion__head:hover,
.page-about .about-index .accordion__head:focus-visible {
  background: rgba(47, 211, 245, .06);
  outline: none;
}

.page-about .about-index .accordion__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--volt);
  opacity: .9;
}

.page-about .about-index .accordion__title {
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.7vw, 17px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--chalk);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.page-about .about-index .accordion__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--mist);
  white-space: nowrap;
}

.page-about .about-index .accordion__icon {
  position: relative;
  flex: none;
  width: 20px;
  height: 20px;
  border: 1px solid var(--grid);
  border-radius: 5px;
}

.page-about .about-index .accordion__icon::before,
.page-about .about-index .accordion__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--volt);
}

.page-about .about-index .accordion__icon::before {
  width: 8px;
  height: 1.5px;
}

.page-about .about-index .accordion__icon::after {
  width: 1.5px;
  height: 8px;
  transition: opacity var(--t-fast);
}

.page-about .about-index .accordion__head[aria-expanded="true"] .accordion__icon::after {
  opacity: 0;
}

.page-about .about-index .accordion__body {
  overflow: hidden;
}

.page-about .about-index .accordion__inner {
  padding: 2px 0 20px;
}

.page-about .about-index .accordion__inner p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
  max-width: 620px;
}

/* 时间轴节点 */
.page-about .about-season .accordion__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  box-sizing: border-box;
  background: var(--carbon);
  border: 2px solid var(--volt);
  transition: background var(--t), border-color var(--t), transform var(--t);
}

.page-about .about-season .accordion__item:hover::before,
.page-about .about-season .accordion__item:focus-within::before {
  background: var(--electric);
  border-color: var(--electric);
  transform: scale(1.12);
}

.page-about .about-season .accordion__item:first-child {
  border-top: 1px solid var(--about-line);
}

@media (max-width: 600px) {
  .page-about .about-seasons__track { padding-left: 24px; }
  .page-about .about-seasons__track::before { left: 6px; }
  .page-about .about-season .accordion__item::before { left: -22px; }
}

@media (max-width: 560px) {
  .page-about .about-index .accordion__num { display: none; }
  .page-about .about-index .accordion__head {
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 10px;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team__figure {
  margin: 0 0 clamp(22px, 3vw, 34px);
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--about-soft);
  background: var(--panel);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
}

.page-about .about-team {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-team .about-card {
  border-top: 3px solid var(--team-accent);
}

.page-about .about-team .about-card:nth-child(1) { --team-accent: var(--volt); }
.page-about .about-team .about-card:nth-child(2) { --team-accent: var(--electric); }
.page-about .about-team .about-card:nth-child(3) { --team-accent: var(--amber); }

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--team-accent);
}

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: 5fr 4fr 3fr;
    align-items: stretch;
  }
}

/* ---------- 合作共建 ---------- */
.page-about .about-collab {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
}

.page-about .about-collab__figure {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--about-soft);
  background: var(--panel);
}

.page-about .about-collab__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 380px;
  object-fit: cover;
}

.page-about .about-collab__text .btn {
  margin-top: 22px;
}

@media (min-width: 900px) {
  .page-about .about-collab {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: center;
  }
}

/* ---------- 联系方式 ---------- */
.page-about .about-contact {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
}

.page-about .about-contact__list {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-soft);
  border: 1px solid var(--about-soft);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .about-contact__row {
  background: var(--panel);
  display: grid;
  gap: 6px;
  padding: 16px 18px;
}

.page-about .about-contact__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--volt);
}

.page-about .about-contact__v {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.7vw, 17px);
  line-height: 1.5;
  color: var(--chalk);
  word-break: break-word;
}

.page-about .about-contact__side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-contact__side p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 620px;
}

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

@media (min-width: 900px) {
  .page-about .about-contact {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-card,
  .page-about .about-index .accordion__icon::after,
  .page-about .about-season .accordion__item::before {
    transition: none;
  }
  .page-about .about-card:hover {
    transform: none;
  }
}