.page-about {
  --about-shadow: 0 10px 30px rgba(0, 0, 0, 0.38);
  background: var(--night);
  color: var(--white);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 1.75rem 0 2.5rem;
  background:
    radial-gradient(110% 80% at 90% 0%, rgba(184, 255, 61, 0.17), transparent 56%),
    linear-gradient(168deg, var(--tactic) 0%, var(--night) 56%, var(--carbon) 100%);
  border-bottom: 1px solid rgba(184, 255, 61, 0.2);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  top: -20%;
  right: -16%;
  width: 46%;
  height: 140%;
  background: linear-gradient(180deg, rgba(46, 230, 200, 0.14), rgba(184, 255, 61, 0.04));
  transform: skewX(-13deg);
}

.page-about .about-crumb {
  margin-bottom: 1.15rem;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 1.75rem;
}

.page-about .about-hero h1 {
  margin: 0.35rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 8.4vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-about .about-hero h1 span {
  color: var(--lime);
}

.page-about .about-hero__text {
  margin: 0 0 1.5rem;
  max-width: 46ch;
  font-size: 1rem;
  line-height: 1.78;
  color: rgba(244, 255, 248, 0.82);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.625rem;
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.85rem 0.9rem;
  border-radius: var(--radius-md);
  background: rgba(7, 16, 13, 0.58);
  border: 1px solid rgba(126, 155, 143, 0.26);
}

.page-about .about-hero__stats .num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--lime);
  line-height: 1.15;
}

.page-about .about-hero__stats li > span:last-child {
  font-size: 0.76rem;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  padding-top: 1.75rem;
  padding-bottom: 3rem;
}

.page-about .about-index {
  margin-bottom: 1.5rem;
}

.page-about .about-index__title {
  margin: 0 0 0.6rem;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0.35rem;
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.8rem;
  border-radius: var(--pill);
  border: 1px solid rgba(126, 155, 143, 0.3);
  background: rgba(7, 16, 13, 0.55);
  color: rgba(244, 255, 248, 0.8);
  font-size: 0.82rem;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
  background: rgba(184, 255, 61, 0.09);
}

.page-about .about-index__idx {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--lime);
}

/* ---------- 区块通用 ---------- */
.page-about .about-block {
  padding: 2rem 0;
  border-top: 1px solid rgba(126, 155, 143, 0.16);
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
}

.page-about .about-block:first-child {
  border-top: 0;
  padding-top: 0.35rem;
}

.page-about .about-block__head {
  margin-bottom: 1.5rem;
}

.page-about .about-block__num {
  display: inline-block;
  margin: 0 0 0.65rem;
  padding-left: 0.55rem;
  border-left: 3px solid var(--yellow);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--yellow);
}

.page-about .about-block__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.32rem, 5vw, 1.95rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .about-block__lead {
  margin: 0;
  max-width: 62ch;
  font-size: 0.94rem;
  line-height: 1.78;
  color: rgba(244, 255, 248, 0.72);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 1.5rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(126, 155, 143, 0.24);
  background: var(--tactic);
}

.page-about .about-figure--tight {
  margin: 1.5rem 0 0;
}

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

.page-about .about-figure figcaption {
  padding: 0.7rem 1rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--mist);
  background: rgba(7, 16, 13, 0.65);
  border-top: 1px solid rgba(126, 155, 143, 0.16);
}

/* ---------- 时间线 ---------- */
.page-about .track {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.75rem;
  display: grid;
  gap: 0.85rem;
  position: relative;
}

.page-about .track::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime) 0%, rgba(184, 255, 61, 0.12) 100%);
}

.page-about .track__item {
  position: relative;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(126, 155, 143, 0.22);
  background: linear-gradient(140deg, rgba(18, 53, 43, 0.95) 0%, rgba(11, 31, 26, 0.92) 100%);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .track__item::before {
  content: "";
  position: absolute;
  left: -1.75rem;
  top: 1.15rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--lime);
  box-sizing: border-box;
}

.page-about .track__item:hover {
  transform: translateX(3px);
  border-color: rgba(184, 255, 61, 0.55);
  box-shadow: var(--about-shadow);
}

.page-about .track__year {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--lime);
}

.page-about .track__title {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
}

.page-about .track__desc {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(244, 255, 248, 0.7);
}

/* ---------- 团队分工 ---------- */
.page-about .crew-spectrum {
  display: flex;
  gap: 3px;
  height: 6px;
  margin-bottom: 1.1rem;
  border-radius: var(--pill);
  overflow: hidden;
}

.page-about .crew-spectrum span {
  display: block;
  height: 100%;
}

.page-about .crew-spectrum span:nth-child(1) {
  flex: 3;
  background: var(--lime);
}

.page-about .crew-spectrum span:nth-child(2) {
  flex: 3;
  background: var(--cyan);
}

.page-about .crew-spectrum span:nth-child(3) {
  flex: 2;
  background: var(--yellow);
}

.page-about .crew-spectrum span:nth-child(4) {
  flex: 2;
  background: var(--red);
}

.page-about .crew-grid {
  display: grid;
  gap: 0.75rem;
}

.page-about .crew-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.15rem 1.05rem 1.25rem;
  border-radius: var(--radius-md);
  background: rgba(18, 53, 43, 0.62);
  border: 1px solid rgba(126, 155, 143, 0.2);
  border-top: 3px solid var(--lime);
}

.page-about .crew-card:nth-child(2) {
  border-top-color: var(--cyan);
}

.page-about .crew-card:nth-child(3) {
  border-top-color: var(--yellow);
}

.page-about .crew-card:nth-child(4) {
  border-top-color: var(--red);
}

.page-about .crew-card__role {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .crew-card__desc {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.72;
  color: rgba(244, 255, 248, 0.72);
}

/* ---------- 联赛覆盖 ---------- */
.page-about .coverage-grid {
  display: grid;
  gap: 0.75rem;
}

.page-about .coverage-card {
  padding: 1.1rem;
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(18, 53, 43, 0.9), rgba(7, 16, 13, 0.9));
  border: 1px solid rgba(126, 155, 143, 0.22);
}

.page-about .coverage-card__tag {
  display: inline-block;
  margin-bottom: 0.6rem;
  padding: 0.18rem 0.6rem;
  border-radius: var(--pill);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--carbon);
  background: var(--lime);
}

.page-about .coverage-card--yellow .coverage-card__tag {
  background: var(--yellow);
}

.page-about .coverage-card--cyan .coverage-card__tag {
  background: var(--cyan);
}

.page-about .coverage-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
}

.page-about .coverage-card p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.72;
  color: rgba(244, 255, 248, 0.72);
}

/* ---------- 同步流程 ---------- */
.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .flow__step {
  position: relative;
  padding: 0.9rem 1rem 0.95rem 2.75rem;
  border-radius: var(--radius-sm);
  background: rgba(18, 53, 43, 0.56);
  border: 1px solid rgba(126, 155, 143, 0.2);
}

.page-about .flow__idx {
  position: absolute;
  left: 0.9rem;
  top: 0.95rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--lime);
}

.page-about .flow__title {
  margin: 0 0 0.25rem;
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.5;
}

.page-about .flow__desc {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.65;
  color: rgba(244, 255, 248, 0.7);
}

/* ---------- 合作生态 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: 0.75rem;
}

.page-about .partner-card {
  padding: 1.05rem 1.1rem;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--lime);
  background: rgba(7, 16, 13, 0.58);
  border-top: 1px solid rgba(126, 155, 143, 0.16);
  border-right: 1px solid rgba(126, 155, 143, 0.16);
  border-bottom: 1px solid rgba(126, 155, 143, 0.16);
}

.page-about .partner-card--yellow {
  border-left-color: var(--yellow);
}

.page-about .partner-card--cyan {
  border-left-color: var(--cyan);
}

.page-about .partner-card--red {
  border-left-color: var(--red);
}

.page-about .partner-card h3 {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.5;
}

.page-about .partner-card p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.72;
  color: rgba(244, 255, 248, 0.7);
}

/* ---------- 服务与联系 ---------- */
.page-about .service-panel {
  padding: 1.4rem 1.15rem 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(184, 255, 61, 0.28);
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(184, 255, 61, 0.16), transparent 60%),
    linear-gradient(150deg, var(--tactic), var(--carbon));
}

.page-about .service-panel__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.page-about .service-contact {
  display: grid;
  gap: 0.55rem;
  margin: 1.05rem 0 1.25rem;
}

.page-about .service-contact__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.3rem 0.8rem;
  margin: 0;
  padding-bottom: 0.55rem;
  border-bottom: 1px dashed rgba(126, 155, 143, 0.28);
  font-size: 0.88rem;
  line-height: 1.65;
}

.page-about .service-contact__label {
  min-width: 3.6rem;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .service-contact__value {
  color: var(--white);
  text-decoration: none;
  word-break: break-word;
}

.page-about a.service-contact__value:hover,
.page-about a.service-contact__value:focus-visible {
  color: var(--lime);
  text-decoration: underline;
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 420px) {
  .page-about .about-hero__stats .num {
    font-size: 1.3rem;
  }

  .page-about .about-figure figcaption {
    font-size: 0.74rem;
  }
}

/* ---------- 中等宽度 ---------- */
@media (min-width: 620px) {
  .page-about .crew-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 760px) {
  .page-about .coverage-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-block {
    padding: 2.5rem 0;
  }

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

/* ---------- 桌面：索引跟随与横向流程 ---------- */
@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 2.25rem 0 3.25rem;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.86fr);
    gap: 3rem;
    align-items: end;
  }

  .page-about .about-body {
    display: grid;
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 3.5rem;
    align-items: start;
    padding-top: 2.5rem;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
    margin-bottom: 0;
  }

  .page-about .about-index__title {
    margin-bottom: 0.8rem;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 0.2rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__list a {
    padding: 0.45rem 0.6rem;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: none;
    white-space: normal;
  }

  .page-about .about-index__list a:hover,
  .page-about .about-index__list a:focus-visible {
    border-left-color: var(--lime);
    background: rgba(184, 255, 61, 0.07);
  }

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

  .page-about .flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .flow__step {
    padding: 2.4rem 0.9rem 1rem;
  }

  .page-about .flow__step::after {
    content: "";
    position: absolute;
    left: 0.9rem;
    top: 1.55rem;
    width: calc(100% - 1.8rem);
    height: 2px;
    background: linear-gradient(90deg, var(--lime), rgba(184, 255, 61, 0.14));
  }

  .page-about .flow__idx {
    top: 0.85rem;
    left: 0.9rem;
  }

  .page-about .service-panel {
    padding: 1.8rem 1.75rem 1.9rem;
  }
}

@media (min-width: 1180px) {
  .page-about .about-body {
    grid-template-columns: 224px minmax(0, 1fr);
    gap: 4rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .track__item,
  .page-about .about-index__list a {
    transition: none;
  }

  .page-about .track__item:hover {
    transform: none;
  }
}