.page-about {
  --ab-anim: 260ms ease;
  --ab-tick: rgba(147, 166, 198, 0.45);
  display: block;
  background: var(--night);
}

.page-about .breadcrumbs {
  padding-top: clamp(18px, 3vw, 34px);
}

.page-about .breadcrumbs__current {
  color: var(--white);
  font-weight: 600;
}

/* ---------- 纵向注释 ---------- */
.page-about .v-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  line-height: 1;
  color: var(--grey);
  min-height: 104px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(20px, 3vw, 40px);
}

.page-about .about-hero__field {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background-color: #0a1b38;
  padding: clamp(26px, 4vw, 56px) clamp(20px, 3.4vw, 48px);
}

.page-about .about-hero__field::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 140% at 88% 6%, rgba(74, 134, 232, 0.24), transparent 58%),
    radial-gradient(90% 130% at 4% 100%, rgba(232, 69, 90, 0.14), transparent 62%);
  pointer-events: none;
}

.page-about .about-hero__field::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(244, 247, 255, 0.045) 0 1px,
    transparent 1px 7px
  );
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  align-items: start;
}

.page-about .about-hero__rail {
  min-height: 132px;
}

.page-about .about-hero__copy {
  padding-right: clamp(0px, 2vw, 24px);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 6.2vw, 82px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-hero__hl {
  color: var(--yellow);
}

.page-about .about-hero__lead {
  margin-top: 22px;
  max-width: 60ch;
  color: var(--mist);
}

.page-about .about-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 0;
}

.page-about .about-hero__figure {
  margin: 6px 0 0;
}

/* ---------- 品牌由来 ---------- */
.page-about .about-origin__grid {
  align-items: start;
  row-gap: var(--gap);
}

.page-about .about-origin__note {
  margin-top: 6px;
}

.page-about .prose p {
  max-width: 66ch;
}

/* ---------- 横向主题带 ---------- */
.page-about .about-band {
  background:
    linear-gradient(180deg, rgba(15, 37, 71, 0.96) 0%, rgba(11, 28, 56, 0.96) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__head,
.page-about .about-metrics__head {
  max-width: 62ch;
}

.page-about .about-team__title,
.page-about .about-metrics__title {
  margin-top: 10px;
}

.page-about .about-team__lead,
.page-about .about-metrics__lead {
  margin-top: 16px;
}

/* ---------- 三条编辑线 ---------- */
.page-about .team-lines {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .team-line {
  position: relative;
  padding: 24px 22px 22px 28px;
  border-radius: var(--r-md);
  background: rgba(8, 21, 46, 0.72);
  border: 1px solid var(--line);
  transition: transform var(--ab-anim), border-color var(--ab-anim);
}

.page-about .team-line:hover {
  transform: translateY(-4px);
  border-color: rgba(244, 247, 255, 0.24);
}

.page-about .team-line__rule {
  position: absolute;
  left: 12px;
  top: 26px;
  bottom: 26px;
  width: 3px;
  border-radius: var(--pill);
  background: var(--yellow);
}

.page-about .team-line--data .team-line__rule {
  background: var(--green);
}

.page-about .team-line--transfer .team-line__rule {
  background: var(--red);
}

.page-about .team-line__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-about .team-line__name {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  color: var(--white);
}

.page-about .team-line__desc {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--grey);
}

/* ---------- 生产流程 ---------- */
.page-about .about-flow__head {
  align-items: start;
  row-gap: var(--gap);
}

.page-about .about-flow__lead {
  margin-top: 16px;
  max-width: 58ch;
}

.page-about .flow-wrap {
  position: relative;
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .flow-ruler {
  position: absolute;
  left: 0;
  right: 0;
  top: 30px;
  width: 100%;
  height: 10px;
  color: var(--ab-tick);
  z-index: 0;
  pointer-events: none;
}

.page-about .flow-band {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .flow-node {
  position: relative;
  padding: 20px 16px 18px;
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(27, 58, 107, 0.6), rgba(15, 37, 71, 0.94));
  border: 1px solid var(--line);
  transition: transform var(--ab-anim), border-color var(--ab-anim), box-shadow var(--ab-anim);
}

.page-about .flow-node:hover,
.page-about .flow-node:focus {
  transform: translateY(-5px);
  border-color: var(--yellow);
  box-shadow: 0 14px 32px rgba(3, 9, 22, 0.55);
}

.page-about .flow-node:focus-visible {
  outline: 2px solid var(--yellow);
  outline-offset: 3px;
}

.page-about .flow-node__idx {
  display: block;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--yellow);
}

.page-about .flow-node__name {
  display: block;
  margin-top: 8px;
  font-size: 18px;
  font-weight: 800;
  color: var(--white);
}

.page-about .flow-node__note {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--grey);
  opacity: 0.78;
  transition: opacity var(--ab-anim), color var(--ab-anim);
}

.page-about .flow-node:hover .flow-node__note,
.page-about .flow-node:focus .flow-node__note {
  opacity: 1;
  color: var(--mist);
}

.page-about .about-flow__tail {
  margin-top: clamp(30px, 4vw, 52px);
  align-items: start;
  row-gap: var(--gap);
}

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

.page-about .about-flow__sub {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 800;
  color: var(--white);
}

.page-about .about-flow__text p {
  margin: 16px 0 0;
  max-width: 66ch;
  color: var(--grey);
  line-height: 1.85;
}

/* ---------- 两项统计 ---------- */
.page-about .about-metrics__grid {
  margin-top: clamp(28px, 4vw, 46px);
  align-items: start;
  row-gap: var(--gap);
}

.page-about .about-stat {
  padding: clamp(22px, 3vw, 32px);
  background: rgba(8, 21, 46, 0.8);
  border: 1px solid var(--line);
}

.page-about .about-stat--red {
  border-top: 3px solid var(--red);
}

.page-about .about-stat--green {
  border-top: 3px solid var(--green);
}

.page-about .about-stat__name {
  margin: 14px 0 0;
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 800;
  color: var(--white);
}

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

.page-about .about-stat__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.page-about .about-stat__list li {
  position: relative;
  padding-left: 18px;
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-stat__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 2px;
  border-radius: var(--pill);
  background: var(--blue);
}

.page-about .about-stat--red .about-stat__list li::before {
  background: var(--red);
}

.page-about .about-stat--green .about-stat__list li::before {
  background: var(--green);
}

.page-about .about-metrics__note {
  margin-top: 4px;
}

/* ---------- 品牌历程 ---------- */
.page-about .about-era__head {
  align-items: start;
  row-gap: var(--gap);
}

.page-about .about-era__lead {
  margin-top: 16px;
  max-width: 58ch;
}

.page-about .about-era__body {
  margin-top: clamp(28px, 4vw, 48px);
  align-items: start;
  row-gap: clamp(28px, 4vw, 44px);
}

.page-about .era-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--line);
}

.page-about .era {
  position: relative;
  padding-bottom: 28px;
}

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

.page-about .era::before {
  content: "";
  position: absolute;
  left: calc(-22px - 5px);
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--blue);
}

.page-about .era--yellow::before { border-color: var(--yellow); }
.page-about .era--red::before { border-color: var(--red); }
.page-about .era--green::before { border-color: var(--green); }

.page-about .era__mark {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--yellow);
}

.page-about .era__name {
  margin: 8px 0 0;
  font-size: 19px;
  font-weight: 800;
  color: var(--white);
}

.page-about .era__desc {
  margin: 10px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--grey);
}

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

/* ---------- 联系团队 ---------- */
.page-about .about-contact__grid {
  align-items: start;
  row-gap: var(--gap);
}

.page-about .about-contact__desc {
  margin: 16px 0 0;
  max-width: 58ch;
  color: var(--grey);
  line-height: 1.85;
}

.page-about .about-contact__cta {
  margin: 26px 0 0;
}

.page-about .about-contact__panel {
  padding: clamp(22px, 3vw, 32px);
  background: rgba(8, 21, 46, 0.8);
  border: 1px solid var(--line);
}

.page-about .about-contact__note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--grey);
}

/* ---------- 图片基础 ---------- */
.page-about .figure-frame__media img {
  display: block;
  max-width: 100%;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .flow-band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .team-lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 1080px) {
  .page-about .flow-band {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (max-width: 860px) {
  .page-about .about-hero__rail,
  .page-about .about-origin__rail,
  .page-about .about-flow__rail,
  .page-about .about-era__rail {
    writing-mode: horizontal-tb;
    min-height: 0;
    margin-bottom: 8px;
    letter-spacing: 0.18em;
  }

  .page-about .about-hero__field {
    border-radius: var(--r-md);
  }
}

@media (max-width: 560px) {
  .page-about .about-hero__links .btn {
    flex: 1 1 100%;
    text-align: center;
  }

  .page-about .team-line,
  .page-about .flow-node,
  .page-about .about-stat,
  .page-about .about-contact__panel {
    border-radius: var(--r-sm);
  }

  .page-about .about-hero__title {
    font-size: clamp(28px, 8.4vw, 40px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-line,
  .page-about .flow-node,
  .page-about .flow-node__note {
    transition: none;
  }

  .page-about .team-line:hover,
  .page-about .flow-node:hover,
  .page-about .flow-node:focus {
    transform: none;
  }
}