.page-about {
  --ab-radius: 6px;
  --ab-line: 1px solid var(--hairline);
  display: block;
}

.page-about .about-crumb {
  padding-top: 24px;
  padding-bottom: 8px;
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 8px 0 16px;
  background:
    radial-gradient(circle at 88% 8%, rgba(45, 226, 230, 0.15), transparent 52%),
    radial-gradient(circle at 4% 92%, rgba(255, 122, 61, 0.12), transparent 48%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -120px;
  right: -160px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: conic-gradient(from 210deg, rgba(45, 226, 230, 0.2), rgba(255, 122, 61, 0.14), transparent 70%);
  filter: blur(4px);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 36px;
  padding-top: 16px;
  padding-bottom: 24px;
}

.page-about .about-hero__lead .lede {
  margin-top: 18px;
  max-width: 34em;
}

.page-about .about-hero__actions {
  margin-top: 26px;
  gap: 12px;
}

.page-about .about-hero__factstitle {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.page-about .facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hairline);
  border: var(--ab-line);
  border-radius: var(--ab-radius);
  overflow: hidden;
}

.page-about .fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 16px;
  background: var(--surface);
}

.page-about .fact__k {
  font-size: 13px;
  color: var(--muted);
  flex: 0 0 auto;
}

.page-about .fact__v {
  font-size: 14px;
  color: var(--text);
  text-align: right;
  word-break: break-word;
}

/* 章节通用 */
.page-about .about-head {
  max-width: 46em;
  margin-bottom: 32px;
}

.page-about .about-head .lede {
  margin-top: 14px;
}

.page-about .about-split {
  display: grid;
  gap: 32px;
  align-items: start;
}

.page-about .about-split__text p {
  margin-top: 16px;
  max-width: 34em;
  color: var(--muted);
  line-height: 1.85;
}

.page-about .about-split__text .section-title {
  margin-top: 10px;
}

.page-about .about-split__text .link {
  display: inline-block;
  margin-top: 20px;
}

/* 图片位 */
.page-about .about-media {
  margin: 0;
  border: var(--ab-line);
  border-radius: var(--ab-radius);
  overflow: hidden;
  background: var(--surface);
  box-shadow: 0 24px 48px -40px #000;
}

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

.page-about .about-media__cap {
  padding: 12px 16px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  border-top: var(--ab-line);
}

/* 全宽摘要带 */
.page-about .about-band {
  margin: 8px 0;
  border-top: var(--ab-line);
  border-bottom: var(--ab-line);
  background:
    linear-gradient(100deg, rgba(45, 226, 230, 0.14), rgba(255, 122, 61, 0.12) 78%, rgba(45, 226, 230, 0.05));
}

.page-about .about-band__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 20px;
  padding-top: 30px;
  padding-bottom: 30px;
}

.page-about .bstat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-left: 2px solid var(--accent);
  padding-left: 14px;
}

.page-about .bstat__v {
  font-size: 26px;
  line-height: 1.1;
  color: var(--text);
}

.page-about .bstat__l {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

/* 四大板块 */
.page-about .pillars {
  display: grid;
  gap: 18px;
}

.page-about .pillar {
  padding: 22px 20px 24px;
  border: var(--ab-line);
  border-radius: var(--ab-radius);
  background: var(--surface);
  box-shadow: 0 24px 44px -42px #000;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-about .pillar:hover,
.page-about .pillar:focus-within {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.page-about .pillar__num {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--accent);
}

.page-about .pillar__title {
  margin: 10px 0 0;
  font-size: 21px;
  line-height: 1.3;
  color: var(--text);
}

.page-about .pillar p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .pillar__meta {
  padding-top: 12px;
  border-top: 1px dashed var(--hairline);
  font-size: 13px;
  color: var(--text);
}

.page-about .pillar .link {
  display: inline-block;
  margin-top: 14px;
  font-size: 14px;
}

/* 团队 */
.page-about .crew {
  margin-top: 24px;
}

.page-about .crew__item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 0;
  border-top: var(--ab-line);
}

.page-about .crew__n {
  font-size: 30px;
  line-height: 1;
  color: var(--accent);
}

.page-about .crew__t {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.page-about .crew__d {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 时间轴 */
.page-about .arc {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .arc__item {
  position: relative;
  margin-left: 5px;
  padding: 0 0 30px 26px;
  border-left: 1px solid var(--hairline);
}

.page-about .arc__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(45, 226, 230, 0.14);
}

.page-about .arc__item--now::before {
  background: var(--orange-500);
  box-shadow: 0 0 0 4px rgba(255, 122, 61, 0.18);
}

.page-about .arc__item:hover::before {
  box-shadow: 0 0 0 6px rgba(45, 226, 230, 0.22);
}

.page-about .arc__year {
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.page-about .arc__item--now .arc__year {
  color: var(--orange-200);
}

.page-about .arc__title {
  margin: 6px 0 0;
  font-size: 18px;
  line-height: 1.35;
  color: var(--text);
}

.page-about .arc__body {
  margin: 8px 0 0;
  max-width: 32em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-media--sticky {
  align-self: start;
}

/* 合作与质量 */
.page-about .about-coop .about-head .lede {
  color: var(--muted);
}

.page-about .coop {
  display: grid;
  gap: 16px;
}

.page-about .coop__card {
  padding: 22px 20px;
  border: var(--ab-line);
  border-radius: var(--ab-radius);
  background: var(--surface);
}

.page-about .coop__title {
  margin: 0 0 10px;
  font-size: 18px;
  color: var(--text);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}

.page-about .coop__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-fold {
  margin-top: 24px;
  border: var(--ab-line);
  border-radius: var(--ab-radius);
  background: var(--surface);
  padding: 4px 18px;
}

.page-about .about-fold .fold__summary {
  padding: 14px 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
}

.page-about .about-fold .fold__body p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-fold .fold__body strong {
  color: var(--text);
  font-weight: 600;
}

/* 服务规模 */
.page-about .svc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: var(--ab-line);
  border-radius: var(--ab-radius);
  overflow: hidden;
}

.page-about .svc {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  background: var(--surface);
}

.page-about .svc__v {
  font-size: 25px;
  line-height: 1.1;
  color: var(--accent);
}

.page-about .svc__l {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

/* 结尾行动区 */
.page-about .about-cta {
  margin-top: 48px;
  padding: 28px 22px;
  border: var(--ab-line);
  border-radius: var(--ab-radius);
  background:
    linear-gradient(120deg, rgba(45, 226, 230, 0.1), rgba(255, 122, 61, 0.1));
}

.page-about .about-cta__title {
  margin: 0;
  font-size: 22px;
  line-height: 1.35;
  color: var(--text);
}

.page-about .about-cta__text p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 40em;
}

.page-about .about-cta__actions {
  margin-top: 20px;
  gap: 12px;
}

@media (min-width: 760px) {
  .page-about .about-band__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .pillars {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .pillar:nth-child(even) {
    margin-top: 32px;
  }

  .page-about .coop {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

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

  .page-about .about-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    padding: 30px 28px;
  }

  .page-about .about-cta__actions {
    margin-top: 0;
    flex: 0 0 auto;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
    gap: 56px;
    padding-top: 24px;
    padding-bottom: 40px;
  }

  .page-about .about-hero__facts {
    padding-bottom: 6px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 56px;
  }

  .page-about .about-split--rev {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

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

  .page-about .about-media--sticky {
    position: sticky;
    top: 32px;
  }

  .page-about .about-head {
    margin-bottom: 40px;
  }

  .page-about .crew__item {
    grid-template-columns: 72px minmax(0, 1fr);
  }

  .page-about .bstat__v {
    font-size: 30px;
  }

  .page-about .svc__v {
    font-size: 28px;
  }
}
</