.page-about {
  --about-gap: clamp(20px, 3.4vw, 44px);
  --about-card-bg: linear-gradient(165deg, rgba(18, 53, 42, 0.94), rgba(6, 18, 13, 0.78));
  --about-hair: rgba(42, 174, 155, 0.22);
  display: block;
}

/* ---------- 通用段落与标题 ---------- */
.page-about h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 4.1vw, 2.6rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--white);
  margin: 0 0 16px;
}

.page-about .sec-lead {
  max-width: 44rem;
  margin: 0;
  color: var(--grey);
  font-size: clamp(0.98rem, 1.6vw, 1.06rem);
  line-height: 1.8;
}

.page-about .anno--rot {
  display: inline-block;
  transform: rotate(-4deg);
  transform-origin: left center;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3.6vw, 40px) 0 clamp(46px, 6vw, 88px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -16%;
  right: -20%;
  width: min(660px, 76vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 32% 32%, rgba(0, 229, 195, 0.26), rgba(0, 229, 195, 0) 62%);
  border-radius: 46% 54% 60% 40% / 52% 44% 56% 48%;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -12%;
  bottom: -24%;
  width: min(520px, 70vw);
  aspect-ratio: 1.5 / 1;
  background: linear-gradient(135deg, rgba(255, 59, 78, 0.15), rgba(255, 59, 78, 0) 68%);
  border-radius: 40% 60% 52% 48% / 58% 42% 58% 42%;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
  margin-top: clamp(16px, 2.4vw, 26px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.05rem, 6.6vw, 4.4rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--white);
  margin: 14px 0 20px;
  max-width: 15em;
}

.page-about .about-hero__lead {
  max-width: 38rem;
  margin: 0 0 14px;
  color: var(--white);
  font-size: clamp(1rem, 1.75vw, 1.14rem);
  line-height: 1.85;
}

.page-about .about-hero__lead--sub {
  color: var(--grey);
  font-size: clamp(0.95rem, 1.5vw, 1.02rem);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

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

.page-about .about-hero__figure .figure__media {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-hair);
}

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

/* ---------- 数据条 ---------- */
.page-about .about-ledger {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(32px, 5vw, 60px);
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-ledger__cell {
  padding: clamp(16px, 2.6vw, 26px);
  background: linear-gradient(160deg, rgba(18, 53, 42, 0.96), rgba(6, 18, 13, 0.9));
}

.page-about .about-ledger .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.55rem, 4vw, 2.3rem);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-about .about-ledger .stat__num small {
  font-size: 0.62em;
  margin-left: 3px;
  color: var(--cyan-bright);
  font-weight: 600;
}

.page-about .about-ledger .stat__label {
  display: block;
  margin-top: 10px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--grey);
}

/* ---------- 里程碑 ---------- */
.page-about .about-miles {
  position: relative;
}

.page-about .about-miles__head {
  max-width: 46rem;
  margin-bottom: clamp(28px, 4.4vw, 50px);
}

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

.page-about .milestones::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 16px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--line) 52%, rgba(42, 174, 155, 0.12) 100%);
}

.page-about .milestone {
  position: relative;
  padding: 0 0 clamp(22px, 3.4vw, 34px) 46px;
}

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

.page-about .milestone__dot {
  position: absolute;
  left: 0;
  top: 4px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--line);
  display: grid;
  place-items: center;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.page-about .milestone__dot::after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--line);
  transition: background 0.25s ease;
}

.page-about .milestone:hover .milestone__dot,
.page-about .milestone:focus-within .milestone__dot {
  border-color: var(--cyan);
  box-shadow: 0 0 0 7px rgba(0, 229, 195, 0.13);
  transform: scale(1.06);
}

.page-about .milestone:hover .milestone__dot::after,
.page-about .milestone:focus-within .milestone__dot::after {
  background: var(--cyan);
}

.page-about .milestone__year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.25rem, 2.7vw, 1.7rem);
  letter-spacing: 0.05em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .milestone__title {
  margin: 0 0 7px;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--white);
}

.page-about .milestone__desc {
  margin: 0;
  max-width: 40rem;
  color: var(--grey);
  font-size: 0.93rem;
  line-height: 1.78;
}

.page-about .about-miles__anno {
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  color: var(--line);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

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

.page-about .about-team__figure .figure__media {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-hair);
}

.page-about .team-cards {
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-about .team-card {
  position: relative;
  padding: 22px 20px 24px 24px;
  border-radius: var(--r-md);
  background: var(--about-card-bg);
  border: 1px solid var(--about-hair);
  overflow: hidden;
}

.page-about .team-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), rgba(0, 229, 195, 0.12));
}

.page-about .team-card__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: 2rem;
  line-height: 1;
  color: var(--white);
}

.page-about .team-card__num small {
  font-size: 0.5em;
  margin-left: 3px;
  color: var(--grey);
  font-weight: 500;
}

.page-about .team-card__name {
  margin: 12px 0 8px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .team-card__desc {
  margin: 0;
  color: var(--grey);
  font-size: 0.9rem;
  line-height: 1.75;
}

/* ---------- 内容线 ---------- */
.page-about .about-lines__head {
  max-width: 46rem;
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-about .lines-grid {
  display: grid;
  gap: 14px;
}

.page-about .line-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 24px;
  border-radius: var(--r-lg);
  border: 1px solid var(--about-hair);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(0, 229, 195, 0.1), rgba(0, 229, 195, 0) 62%),
    linear-gradient(170deg, rgba(18, 53, 42, 0.94), rgba(6, 18, 13, 0.82));
}

.page-about .line-item__no {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--line);
}

.page-about .line-item__stage {
  align-self: flex-start;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(0, 229, 195, 0.38);
  color: var(--cyan-bright);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
}

.page-about .line-item__title {
  margin: 2px 0 0;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--white);
}

.page-about .line-item__desc {
  margin: 0;
  color: var(--grey);
  font-size: 0.9rem;
  line-height: 1.78;
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-devices__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
}

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

.page-about .about-devices__figure .figure__media {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-hair);
}

.page-about .device-list {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .device-item {
  display: grid;
  gap: 4px;
  padding: 16px 18px;
  background: rgba(6, 18, 13, 0.66);
}

.page-about .device-item__name {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--white);
}

.page-about .device-item__desc {
  margin: 0;
  color: var(--grey);
  font-size: 0.9rem;
  line-height: 1.72;
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-eco__note {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
  color: var(--white);
  font-size: 0.94rem;
  line-height: 1.7;
}

.page-about .eco-panel {
  display: grid;
  gap: 1px;
  background: rgba(42, 174, 155, 0.24);
  border: 1px solid rgba(42, 174, 155, 0.24);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .eco-cell {
  padding: clamp(18px, 2.6vw, 26px);
  background: linear-gradient(165deg, rgba(18, 53, 42, 0.96), rgba(6, 18, 13, 0.88));
}

.page-about .eco-cell__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.9rem, 4.6vw, 2.5rem);
  line-height: 1;
  color: var(--white);
}

.page-about .eco-cell__num small {
  font-size: 0.44em;
  margin-left: 4px;
  color: var(--cyan);
  font-weight: 600;
}

.page-about .eco-cell__label {
  display: block;
  margin-top: 12px;
  color: var(--grey);
  font-size: 0.85rem;
  line-height: 1.65;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta__inner {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  padding: clamp(26px, 4vw, 46px);
  border-radius: var(--r-lg);
  border: 1px solid rgba(0, 229, 195, 0.28);
  background:
    radial-gradient(90% 140% at 0% 0%, rgba(0, 229, 195, 0.17), rgba(0, 229, 195, 0) 62%),
    linear-gradient(135deg, rgba(18, 53, 42, 0.96), rgba(6, 18, 13, 0.9));
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 40rem;
  color: var(--grey);
  font-size: 0.98rem;
  line-height: 1.8;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .eco-panel {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .device-item {
    grid-template-columns: 8.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: 4px 18px;
  }
}

@media (min-width: 720px) {
  .page-about .about-ledger {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    column-gap: clamp(32px, 5vw, 68px);
  }

  .page-about .about-hero__figure {
    margin-top: 58px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
  }

  .page-about .about-devices__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr);
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 1100px) {
  .page-about .lines-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .line-item:nth-child(even) {
    margin-top: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .milestone__dot,
  .page-about .milestone__dot::after {
    transition: none;
  }

  .page-about .anno--rot {
    transform: none;
  }
}