.page-about {
  padding-bottom: clamp(40px, 6vw, 88px);
}

/* 面包屑留白 */
.page-about .breadcrumb {
  margin-top: clamp(18px, 3vw, 30px);
  margin-bottom: clamp(8px, 2vw, 16px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-bottom: clamp(36px, 6vw, 76px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}

.page-about .about-hero__copy .display {
  margin: 14px 0 0;
  color: var(--cream);
  font-weight: 300;
  letter-spacing: -0.02em;
}

.page-about .about-hero__copy .lede {
  margin-top: 20px;
  color: var(--gray);
}

.page-about .about-hero__action {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  margin-top: 28px;
}

.page-about .about-hero__hint {
  color: var(--gray);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 24px;
  margin: 34px 0 0;
  padding-top: 24px;
  border-top: 1px dashed var(--line);
}

.page-about .about-hero__stats dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gray);
}

.page-about .about-hero__stats dd {
  margin: 6px 0 0;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--cyan);
}

/* 首屏窗口视觉 */
.page-about .about-hero__visual {
  position: relative;
  isolation: isolate;
}

.page-about .about-hero__visual::before {
  content: "";
  position: absolute;
  inset: 20px -14px -20px 20px;
  border-radius: var(--r-lg);
  background:
    radial-gradient(circle at 80% 20%, rgba(249, 115, 22, 0.22), transparent 58%),
    linear-gradient(140deg, rgba(34, 211, 238, 0.22), rgba(14, 143, 166, 0.08));
  z-index: -1;
}

.page-about .about-hero__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-hero__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: rgba(14, 26, 43, 0.62);
  font-size: 0.95rem;
  color: var(--cream);
}

.page-about .about-hero__list .about-hero__no {
  color: var(--gray);
  font-size: 12px;
}

.page-about .about-hero__list .about-hero__val {
  color: var(--cyan);
  font-size: 12px;
}

/* ---------- 品牌主张 ---------- */
.page-about .about-stance__grid {
  display: grid;
  gap: 18px;
}

.page-about .about-stance__item {
  position: relative;
  padding: 28px 24px 30px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, var(--ink-2), rgba(22, 36, 58, 0.5));
  box-shadow: var(--shadow);
}

.page-about .about-stance__item::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 24px;
  width: 36px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-stance__idx {
  margin: 0;
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-about .about-stance__item h3 {
  margin: 12px 0 10px;
  font-size: 1.22rem;
  font-weight: 600;
  color: var(--cream);
}

.page-about .about-stance__item p:last-child {
  margin: 0;
  color: var(--gray);
  line-height: 1.85;
}

/* ---------- 时间线 ---------- */
.page-about .about-lines__lede {
  margin-top: 4px;
  color: var(--gray);
}

.page-about .about-lines__media {
  margin: 30px 0 36px;
}

.page-about .about-tl {
  border-top: 1px solid var(--line);
}

.page-about .about-tl__item {
  border-bottom: 1px solid var(--line);
}

.page-about .about-tl__heading {
  margin: 0;
  font-size: 1rem;
  font-weight: 400;
}

.page-about .about-tl__trigger {
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 20px 4px;
  background: none;
  border: 0;
  color: var(--cream);
  font: inherit;
  font-size: clamp(1rem, 2vw, 1.12rem);
  text-align: left;
  cursor: pointer;
  transition: color 180ms var(--ease);
}

.page-about .about-tl__trigger:hover,
.page-about .about-tl__trigger:focus-visible {
  color: var(--cyan);
}

.page-about .about-tl__year {
  color: var(--cyan);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.page-about .about-tl__arrow {
  font-family: var(--mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--gray);
  transition: transform 180ms var(--ease), color 180ms var(--ease);
}

.page-about .about-tl__trigger[aria-expanded="true"] .about-tl__arrow {
  transform: rotate(45deg);
  color: var(--orange);
}

.page-about .about-tl__panel {
  overflow: hidden;
}

.page-about .about-tl__panel[hidden] {
  display: none;
}

.page-about .about-tl__panel .accordion__inner {
  padding: 0 6px 26px 4px;
  max-width: 66ch;
  color: var(--gray);
  line-height: 1.85;
}

.page-about .about-tl__panel .accordion__inner a,
.page-about .about-rhythm__row dd a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, 0.45);
}

.page-about .about-tl__panel .accordion__inner a:hover,
.page-about .about-rhythm__row dd a:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 维护节拍 ---------- */
.page-about .about-rhythm__lede {
  margin-top: 4px;
  color: var(--gray);
}

.page-about .about-rhythm__list {
  margin: 32px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-rhythm__row {
  display: grid;
  gap: 10px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-rhythm__row dt {
  color: var(--cream);
  font-size: 1.05rem;
}

.page-about .about-rhythm__row dt .mono {
  display: block;
  margin-bottom: 6px;
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .about-rhythm__row dd {
  margin: 0;
  max-width: 62ch;
  color: var(--gray);
  line-height: 1.85;
}

/* ---------- 团队分工 ---------- */
.page-about .about-team__lede {
  margin-top: 4px;
  color: var(--gray);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  margin-top: 32px;
}

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

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-team__list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 15px 18px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan-deep);
  border-radius: var(--r-sm);
  background: rgba(22, 36, 58, 0.5);
  color: var(--cream);
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .about-team__list li:hover {
  border-left-color: var(--orange);
  background: rgba(22, 36, 58, 0.86);
}

.page-about .about-team__num {
  color: var(--cyan);
  font-size: 13px;
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-reach__lede {
  margin-top: 4px;
  color: var(--gray);
}

.page-about .about-reach__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: 32px;
  align-items: center;
}

.page-about .about-reach__map {
  position: relative;
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-about .about-reach__map img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-reach__pin {
  position: absolute;
  width: 12px;
  height: 12px;
  margin: -6px 0 0 -6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(34, 211, 238, 0.16);
  cursor: default;
}

.page-about .about-reach__pin--a { left: 76%; top: 20%; }
.page-about .about-reach__pin--b { left: 58%; top: 32%; }
.page-about .about-reach__pin--c { left: 28%; top: 38%; }
.page-about .about-reach__pin--d { left: 72%; top: 48%; }
.page-about .about-reach__pin--e { left: 56%; top: 50%; }
.page-about .about-reach__pin--f { left: 36%; top: 62%; }
.page-about .about-reach__pin--g { left: 64%; top: 72%; }

.page-about .about-reach__tip {
  position: absolute;
  bottom: 160%;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--ink-deep);
  border: 1px solid var(--line-strong);
  color: var(--cream);
  font-family: var(--mono);
  font-size: 12px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}

.page-about .about-reach__pin:hover .about-reach__tip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.page-about .about-reach__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin: 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--ink-2);
}

.page-about .about-reach__stats dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--gray);
}

.page-about .about-reach__stats dd {
  margin: 6px 0 0;
  font-size: 1.28rem;
  font-weight: 600;
  color: var(--cream);
}

/* ---------- 备案与站点信息 ---------- */
.page-about .about-record__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding-top: 30px;
  border-top: 1px dashed var(--line);
}

.page-about .about-record__main p {
  margin: 14px 0 0;
  max-width: 62ch;
  color: var(--gray);
  line-height: 1.85;
}

.page-about .about-record__stamp {
  display: inline-block;
  margin: 0;
  padding: 12px 18px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-sm);
  font-family: var(--mono);
  font-size: 1rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.06);
}

.page-about .about-record__note {
  margin: 16px 0 0;
  color: var(--gray);
  line-height: 1.85;
}

.page-about .about-record__link {
  display: inline-block;
  margin-top: 16px;
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(249, 115, 22, 0.5);
}

.page-about .about-record__link:hover {
  color: var(--orange-soft);
  border-bottom-color: var(--orange-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-rhythm__row {
    grid-template-columns: minmax(200px, 0.85fr) minmax(0, 1.6fr);
    gap: 36px;
    align-items: baseline;
  }
}

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

  .page-about .about-stance__item:nth-child(2) {
    margin-top: 30px;
  }

  .page-about .about-stance__item:nth-child(3) {
    margin-top: 60px;
  }

  .page-about .about-record__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 940px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__trigger,
  .page-about .about-tl__arrow,
  .page-about .about-reach__tip,
  .page-about .about-team__list li {
    transition: none;
  }
}