.page-about {
  --about-rail: 180px;
  --about-gap: clamp(24px, 3.5vw, 64px);
  background: var(--mist);
  color: var(--navy-deep);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  background: var(--navy);
  border-bottom: 1px solid var(--line-steel);
  padding: 18px 0 16px;
}
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--steel);
}
.page-about .breadcrumb a {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-about .breadcrumb__sep {
  color: rgba(138, 148, 160, 0.55);
}
.page-about .breadcrumb span[aria-current="page"] {
  color: var(--white);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background:
    radial-gradient(circle at 82% 18%, rgba(22, 224, 196, 0.10), transparent 55%),
    linear-gradient(160deg, var(--navy) 0%, var(--navy-deep) 62%, var(--indigo) 100%);
  color: var(--white);
  padding: clamp(48px, 7vw, 96px) 0 clamp(56px, 8vw, 112px);
  border-bottom: 3px solid var(--navy-deep);
  overflow: hidden;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(22, 224, 196, 0.045) 0 1px,
    transparent 1px 6px
  );
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(36px, 5vw, 64px);
  align-items: center;
}
.page-about .about-hero__kicker {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  border: 1px solid rgba(22, 224, 196, 0.42);
  padding: 5px 12px;
  margin: 0 0 22px;
}
.page-about .about-hero__title {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6.4vw, 62px);
  line-height: 1.08;
  letter-spacing: 0.02em;
  color: var(--white);
}
.page-about .about-hero__lead {
  margin: 0 0 40px;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(245, 247, 249, 0.82);
}
.page-about .about-hero__counts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line-steel);
  border: 1px solid var(--line-steel);
}
.page-about .about-count {
  background: rgba(7, 23, 38, 0.72);
  padding: 20px 18px 22px;
}
.page-about .about-count dt {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}
.page-about .about-count dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.page-about .about-count__num {
  font-size: clamp(30px, 4.4vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}
.page-about .about-count__u {
  font-size: 13px;
  color: var(--steel);
}

/* 首屏指南针刻度盘 */
.page-about .about-hero__dial {
  position: relative;
  justify-self: center;
  width: min(88vw, 380px);
  aspect-ratio: 1 / 1;
}
.page-about .about-hero__ring,
.page-about .about-hero__ring--inner {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(185, 154, 91, 0.55);
}
.page-about .about-hero__ring {
  inset: 0;
  background-image: repeating-conic-gradient(
    from 0deg,
    rgba(185, 154, 91, 0.72) 0deg 0.7deg,
    transparent 0.7deg 6deg
  );
  -webkit-mask: radial-gradient(circle, transparent 78%, #000 78.4%, #000 84%, transparent 84.4%);
  mask: radial-gradient(circle, transparent 78%, #000 78.4%, #000 84%, transparent 84.4%);
}
.page-about .about-hero__ring--inner {
  inset: 14%;
  border-color: rgba(22, 224, 196, 0.35);
}
.page-about .about-hero__needle {
  position: absolute;
  left: 50%;
  top: 8%;
  width: 2px;
  height: 42%;
  background: linear-gradient(to bottom, var(--cyan), rgba(22, 224, 196, 0.15));
  transform-origin: bottom center;
  transform: translateX(-50%) rotate(38deg);
  box-shadow: 0 0 12px rgba(22, 224, 196, 0.55);
}
.page-about .about-hero__hub {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 14px;
  height: 14px;
  margin: -7px 0 0 -7px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 6px rgba(255, 139, 61, 0.16);
}

/* ---------- 章节通用骨架 ---------- */
.page-about .about-chapter {
  padding: clamp(56px, 8vw, 104px) 0;
  background: var(--mist);
}
.page-about .about-chapter--alt {
  background: var(--white);
}
.page-about .about-reach {
  padding: clamp(56px, 8vw, 104px) 0;
  background: linear-gradient(150deg, var(--indigo) 0%, var(--navy) 100%);
  color: var(--white);
}
.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 40px);
}
.page-about .about-chapter__rail {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-steel);
}
.page-about .about-chapter__num {
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--steel);
  letter-spacing: 0.06em;
}
.page-about .about-chapter__rail-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}
.page-about .about-chapter__year {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--orange);
}
.page-about .about-reach .about-chapter__rail {
  border-bottom-color: rgba(245, 247, 249, 0.24);
}
.page-about .about-reach .about-chapter__num {
  -webkit-text-stroke-color: rgba(245, 247, 249, 0.62);
}
.page-about .about-reach .about-chapter__rail-label {
  color: rgba(245, 247, 249, 0.72);
}
.page-about .about-chapter__title {
  margin: 0 0 24px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.22;
  letter-spacing: 0.01em;
  color: var(--navy);
}
.page-about .about-reach .about-chapter__title {
  color: var(--white);
}
.page-about .about-chapter__body p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 70ch;
}
.page-about .about-reach .about-chapter__body p {
  color: rgba(245, 247, 249, 0.82);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 36px 0 40px;
  padding: 0;
  display: grid;
  gap: 0;
  border-left: 1px solid var(--line-steel-strong);
}
.page-about .about-timeline__node {
  position: relative;
  padding: 0 0 26px 26px;
}
.page-about .about-timeline__node:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__dot {
  position: absolute;
  left: -6px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--mist);
  border: 2px solid var(--orange);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-about .about-chapter--alt .about-timeline__dot {
  background: var(--white);
}
.page-about .about-timeline__node:hover .about-timeline__dot,
.page-about .about-timeline__node:focus-within .about-timeline__dot {
  background: var(--orange);
  transform: scale(1.25);
}
.page-about .about-timeline__year {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}
.page-about .about-timeline__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 60ch;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 40px 0 0;
}
.page-about .about-figure .figure__frame {
  border: var(--edge) solid var(--navy);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  background: linear-gradient(135deg, var(--navy) 0%, var(--indigo) 55%, var(--teal) 100%);
}
.page-about .about-figure .figure__frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-figure .figure__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
  letter-spacing: 0.02em;
}
.page-about .about-reach .about-figure .figure__caption {
  color: rgba(245, 247, 249, 0.6);
}

/* ---------- 四条产品线 ---------- */
.page-about .about-lines {
  display: grid;
  gap: 16px;
  margin: 32px 0 0;
}
.page-about .about-line {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line-steel);
  border-top: 6px solid var(--steel);
  padding: 22px 22px 20px;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-about .about-line--teal { border-top-color: var(--teal); }
.page-about .about-line--violet { border-top-color: var(--violet); }
.page-about .about-line--navy { border-top-color: var(--navy); }
.page-about .about-line--wine { border-top-color: var(--wine); }

.page-about .about-line:hover,
.page-about .about-line:focus-within {
  border-color: var(--cyan-deep);
  border-top-color: var(--cyan);
  box-shadow: 10px 10px 0 rgba(7, 23, 38, 0.85);
  transform: translate(-2px, -2px);
}
.page-about .about-line__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
}
.page-about .about-line__name {
  margin: 0;
  font-family: var(--font-body);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--navy);
}
.page-about .about-line__ver {
  font-size: 14px;
  font-weight: 700;
  color: var(--orange);
  cursor: pointer;
  border-bottom: 1px dashed rgba(255, 139, 61, 0.6);
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .about-line__ver:hover,
.page-about .about-line__ver:focus-visible {
  color: var(--cyan-deep);
  border-bottom-color: var(--cyan-deep);
}
.page-about .about-line__ver[data-copied] {
  color: var(--cyan-deep);
  border-bottom-style: solid;
}
.page-about .about-line__desc {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 56ch;
}
.page-about .about-line__meta {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

/* ---------- 版本条带 ---------- */
.page-about .about-verstrip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-steel-strong);
  border: 1px solid var(--line-steel-strong);
  margin: 32px 0 0;
}
.page-about .about-verstrip__item {
  background: var(--mist);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.page-about .about-verstrip__name {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}
.page-about .about-verstrip__val {
  font-size: 18px;
  font-weight: 700;
  color: var(--orange);
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}
.page-about .about-verstrip__val:hover,
.page-about .about-verstrip__val:focus-visible {
  color: var(--cyan-deep);
}
.page-about .about-verstrip__val[data-copied] {
  color: var(--cyan-deep);
}
.page-about .about-verstrip__note {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--steel);
}

/* ---------- 去向链接 ---------- */
.page-about .about-paths {
  display: grid;
  gap: 12px;
  margin-top: 32px;
}
.page-about .about-path {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 20px;
  background: var(--white);
  border: 2px solid var(--navy);
  text-decoration: none;
  color: var(--navy);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .about-path:hover,
.page-about .about-path:focus-visible {
  background: var(--navy);
  color: var(--white);
  border-color: var(--cyan);
  box-shadow: 8px 8px 0 rgba(22, 224, 196, 0.35);
}
.page-about .about-path__label {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.page-about .about-path__go {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan-deep);
  white-space: nowrap;
}
.page-about .about-path:hover .about-path__go,
.page-about .about-path:focus-visible .about-path__go {
  color: var(--cyan);
}

/* ---------- 海河插页 ---------- */
.page-about .about-river {
  background: var(--navy-deep);
  padding: 34px 0 30px;
  border-top: 3px solid var(--navy);
  border-bottom: 3px solid var(--navy);
}
.page-about .about-river__inner {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.page-about .about-river__svg {
  display: block;
  width: 100%;
  height: 56px;
}
.page-about .about-river__note {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--brass);
  text-align: right;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 32px;
  margin-top: 32px;
}
.page-about .about-team__figure {
  margin: 0;
}
.page-about .about-team__figure .figure__frame {
  border: var(--edge) solid var(--navy);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  background: linear-gradient(150deg, var(--navy) 0%, var(--teal) 100%);
}
.page-about .about-team__figure .figure__frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-team__figure .figure__caption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--steel);
}
.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-team__item {
  border-left: 6px solid var(--steel);
  background: var(--white);
  border-top: 1px solid var(--line-steel);
  border-right: 1px solid var(--line-steel);
  border-bottom: 1px solid var(--line-steel);
  padding: 16px 18px;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .about-team__item--teal { border-left-color: var(--teal); }
.page-about .about-team__item--violet { border-left-color: var(--violet); }
.page-about .about-team__item--navy { border-left-color: var(--navy); }
.page-about .about-team__item--wine { border-left-color: var(--wine); }
.page-about .about-team__item--brass { border-left-color: var(--brass); }

.page-about .about-team__item:hover,
.page-about .about-team__item:focus-within {
  transform: translateX(4px);
  box-shadow: 6px 6px 0 rgba(7, 23, 38, 0.75);
}
.page-about .about-team__num {
  display: inline-block;
  font-size: 22px;
  font-weight: 700;
  color: var(--orange);
  margin-bottom: 6px;
}
.page-about .about-team__name {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--navy);
}
.page-about .about-team__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 覆盖与访客 ---------- */
.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: rgba(245, 247, 249, 0.22);
  border: 1px solid rgba(245, 247, 249, 0.22);
  margin: 32px 0 44px;
}
.page-about .about-reach__stat {
  background: rgba(7, 23, 38, 0.55);
  padding: 26px 20px 22px;
}
.page-about .about-reach__num {
  display: block;
  font-size: clamp(36px, 5vw, 62px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.02em;
}
.page-about .about-reach__unit {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(245, 247, 249, 0.78);
}
.page-about .about-reach__hint {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid rgba(245, 247, 249, 0.18);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(245, 247, 249, 0.55);
}
.page-about .about-reach__subtitle {
  margin: 0 0 20px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white);
}
.page-about .about-share {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .about-share__row {
  display: grid;
  grid-template-columns: 72px 1fr 52px;
  align-items: center;
  gap: 14px;
}
.page-about .about-share__label {
  font-size: 14px;
  color: rgba(245, 247, 249, 0.86);
}
.page-about .about-share__bar {
  position: relative;
  display: block;
  height: 10px;
  background: rgba(245, 247, 249, 0.14);
  overflow: hidden;
}
.page-about .about-share__fill {
  display: block;
  height: 100%;
  width: var(--pct, 0%);
  transition: filter var(--dur) var(--ease);
}
.page-about .about-share__fill--teal { background: var(--cyan); }
.page-about .about-share__fill--violet { background: #7B6ADE; }
.page-about .about-share__fill--navy { background: #4E7FA8; }
.page-about .about-share__fill--wine { background: #C45A82; }
.page-about .about-share__row:hover .about-share__fill {
  filter: brightness(1.18);
}
.page-about .about-share__pct {
  font-size: 14px;
  font-weight: 700;
  text-align: right;
  color: var(--orange);
}

/* ---------- 资质引用块 ---------- */
.page-about .about-credits {
  display: grid;
  gap: 14px;
  margin: 32px 0 0;
}
.page-about .about-credit {
  margin: 0;
  padding: 20px 22px;
  background: var(--white);
  border-left: 6px solid var(--navy);
  border-top: 1px solid var(--line-steel);
  border-right: 1px solid var(--line-steel);
  border-bottom: 1px solid var(--line-steel);
  transition: border-left-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .about-credit--wine { border-left-color: var(--wine); }
.page-about .about-credit--brass { border-left-color: var(--brass); }
.page-about .about-credit--teal { border-left-color: var(--teal); }
.page-about .about-credit:hover {
  border-left-color: var(--cyan-deep);
  box-shadow: 6px 6px 0 rgba(7, 23, 38, 0.75);
}
.page-about .about-credit__label {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--steel);
}
.page-about .about-credit__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
  max-width: 62ch;
}

/* ---------- 收尾引导 ---------- */
.page-about .about-cta {
  margin-top: 48px;
  padding: 28px 24px;
  border: 3px solid var(--navy);
  background: var(--mist);
  display: grid;
  gap: 20px;
}
.page-about .about-cta__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--navy);
  max-width: 56ch;
}
.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-lines {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .about-verstrip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-paths {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-team__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-credits {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: clamp(40px, 5vw, 84px);
  }
  .page-about .about-hero__dial {
    width: min(100%, 440px);
    justify-self: end;
    margin-right: -6%;
  }
  .page-about .about-chapter__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }
  .page-about .about-chapter__rail {
    position: sticky;
    top: 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    border-bottom: none;
    border-left: 1px solid var(--line-steel-strong);
    padding: 0 0 0 18px;
  }
  .page-about .about-reach .about-chapter__rail {
    border-left-color: rgba(245, 247, 249, 0.28);
  }
  .page-about .about-chapter__num {
    font-size: 76px;
    -webkit-text-stroke-width: 1.8px;
  }
  .page-about .about-chapter__year {
    margin-left: 0;
  }
  .page-about .about-timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
    border-left: none;
  }
  .page-about .about-timeline__node {
    padding-left: 0;
    padding-bottom: 30px;
    border-left: 1px solid var(--line-steel-strong);
    padding-left: 24px;
  }
  .page-about .about-team {
    grid-template-columns: 5fr 7fr;
    gap: 40px;
    align-items: start;
  }
  .page-about .about-team__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-figure--side {
    max-width: 76%;
  }
  .page-about .about-river__inner {
    flex-direction: row;
    align-items: center;
    gap: 32px;
  }
  .page-about .about-river__svg {
    flex: 1 1 auto;
  }
  .page-about .about-river__note {
    flex: 0 0 auto;
  }
  .page-about .about-cta {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 32px;
  }
}

@media (min-width: 1180px) {
  .page-about {
    --about-rail: 220px;
  }
  .page-about .about-team__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
  .page-about .about-credits {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-line,
  .page-about .about-team__item,
  .page-about .about-path,
  .page-about .about-credit,
  .page-about .about-timeline__dot,
  .page-about .about-share__fill {
    transition: none;
  }
}
</main>

.page-about {
  --pct: 1rem;
}