.page-about .about-h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--text-primary);
  margin: 10px 0 14px;
}

.page-about .about-hero {
  padding: clamp(24px, 5vw, 56px) 0 clamp(28px, 4vw, 44px);
  border-bottom: 1px solid var(--line-dim);
  background:
    radial-gradient(720px 320px at 12% -10%, rgba(57, 229, 140, 0.14), transparent 70%),
    radial-gradient(560px 260px at 92% 8%, rgba(77, 163, 255, 0.1), transparent 72%);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--text-primary);
  margin: 14px 0 18px;
  max-width: 20ch;
}

.page-about .about-hero__lede {
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--text-secondary);
  max-width: 62ch;
  margin: 0;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  background: var(--line-dim);
  border: 1px solid var(--line-dim);
  border-radius: 12px;
  overflow: hidden;
}

.page-about .about-hero__facts > div {
  background: var(--bg-panel);
  padding: 14px 16px;
}

.page-about .about-hero__facts dt {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.page-about .about-hero__facts dd {
  margin: 8px 0 0;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1;
  color: var(--green-arena);
}

.page-about .about-hero__facts .unit {
  display: block;
  margin-top: 8px;
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0;
  color: var(--text-secondary);
}

@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 发展脉络 */
.page-about .about-growth__visual,
.page-about .about-team__visual,
.page-about .about-review__visual {
  margin: 0 0 26px;
}

.page-about .about-growth__visual img,
.page-about .about-team__visual img,
.page-about .about-review__visual img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .timeline__item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  align-items: start;
}

.page-about .timeline__year {
  padding-top: 18px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--green-arena);
  text-align: right;
  padding-right: 12px;
}

.page-about .timeline__card {
  position: relative;
  margin: 0 0 16px 20px;
  border: 1px solid var(--line-dim);
  border-radius: 14px;
  background: var(--bg-panel);
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-about .timeline__card::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 18px;
  bottom: -18px;
  width: 1px;
  background: linear-gradient(to bottom, var(--line-bright), var(--line-dim));
}

.page-about .timeline__card::after {
  content: "";
  position: absolute;
  left: -24px;
  top: 17px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green-arena);
  box-shadow: 0 0 10px rgba(57, 229, 140, 0.65);
}

.page-about .timeline__item:last-child .timeline__card::before {
  display: none;
}

.page-about .timeline__card[open] {
  background: var(--bg-elevated);
  border-color: var(--line-bright);
}

.page-about .timeline__card > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 15px 16px;
  color: var(--text-primary);
}

.page-about .timeline__card > summary::-webkit-details-marker {
  display: none;
}

.page-about .timeline__card > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--green-arena);
}

.page-about .timeline__card[open] > summary::after {
  content: "−";
}

.page-about .timeline__card > summary:focus-visible {
  outline: 2px solid var(--green-arena);
  outline-offset: 2px;
  border-radius: 14px;
}

.page-about .timeline__title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.page-about .timeline__card > p {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}

@media (min-width: 900px) {
  .page-about .timeline__item {
    grid-template-columns: 132px minmax(0, 1fr);
  }
  .page-about .timeline__year {
    font-size: 20px;
    padding-top: 16px;
  }
  .page-about .timeline__card {
    max-width: 760px;
  }
}

/* 团队 */
.page-about .team-bento {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .team-card {
  padding: 18px;
  border: 1px solid var(--line-dim);
  background: var(--bg-panel);
  border-radius: 14px;
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within,
.page-about .team-card:focus {
  transform: translateY(-2px);
  border-color: var(--line-bright);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.36);
  outline: none;
}

.page-about .team-card__num {
  margin: 0 0 10px;
  font-size: clamp(30px, 4vw, 40px);
  line-height: 1;
  color: var(--green-arena);
}

.page-about .team-card--lead .team-card__num {
  font-size: clamp(48px, 7vw, 76px);
  color: var(--white-signal);
}

.page-about .team-card .card-title {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--text-primary);
}

.page-about .team-card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.page-about .team-card--lead {
  background:
    linear-gradient(160deg, rgba(14, 59, 39, 0.9), rgba(11, 18, 16, 0.95)),
    var(--bg-panel);
  border-color: var(--green-deep);
}

@media (min-width: 640px) {
  .page-about .team-bento {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .team-bento {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .team-card--lead {
    grid-column: span 2;
    grid-row: span 2;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
  }
}

/* 内容把关 */
.page-about .review-steps {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .review-step {
  border: 1px solid var(--line-dim);
  border-radius: 12px;
  background: var(--bg-panel);
  padding: 18px;
  border-left: 3px solid var(--green-deep);
}

.page-about .review-step__idx {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--blue-electric);
  margin-bottom: 8px;
}

.page-about .review-step h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--text-primary);
}

.page-about .review-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-secondary);
}

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

.page-about .eco-wrap {
  border-top: 1px solid var(--line-dim);
  padding-top: 18px;
}

.page-about .eco-wrap__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--text-secondary);
}

.page-about .eco-strip {
  list-style: none;
  margin: 0;
  padding: 2px 0 14px;
  display: flex;
  gap: 12px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .eco-strip::-webkit-scrollbar {
  height: 6px;
}

.page-about .eco-strip::-webkit-scrollbar-thumb {
  background: var(--line-bright);
  border-radius: 999px;
}

.page-about .eco-strip:focus-visible {
  outline: 2px solid var(--green-arena);
  outline-offset: 4px;
}

.page-about .eco-node {
  flex: 0 0 240px;
  scroll-snap-align: start;
  border: 1px solid var(--line-dim);
  border-radius: 12px;
  background: var(--bg-panel);
  padding: 16px;
}

.page-about .eco-node__mark {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--orange-signal);
  margin-bottom: 10px;
}

.page-about .eco-node h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--text-primary);
}

.page-about .eco-node p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* 覆盖与节奏 */
.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .about-reach__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-dim);
  border: 1px solid var(--line-dim);
  border-radius: 14px;
  overflow: hidden;
}

.page-about .about-reach__stats .stat {
  background: var(--bg-panel);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-reach__stats .stat-value {
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1;
  color: var(--green-arena);
}

.page-about .about-reach__stats .stat:nth-child(2) .stat-value,
.page-about .about-reach__stats .stat:nth-child(4) .stat-value {
  color: var(--blue-electric);
}

.page-about .about-reach__stats .stat-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-secondary);
}

@media (min-width: 860px) {
  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 36px;
    align-items: start;
  }
  .page-about .about-reach__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* 服务标准 */
.page-about .standard-list {
  margin: 0 0 30px;
  border-top: 1px solid var(--line-dim);
}

.page-about .standard-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-dim);
}

.page-about .standard-row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--blue-electric);
}

.page-about .standard-row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.page-about .standard-row .version-line {
  color: var(--text-primary);
  letter-spacing: 0.04em;
}

@media (min-width: 760px) {
  .page-about .standard-row {
    grid-template-columns: 160px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

.page-about .about-cta {
  border: 1px solid var(--line-dim);
  border-radius: 16px;
  background:
    radial-gradient(420px 180px at 88% 0%, rgba(255, 122, 47, 0.16), transparent 72%),
    var(--bg-panel);
  padding: clamp(20px, 3.4vw, 32px);
}

.page-about .about-cta__text {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-primary);
  max-width: 56ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

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