/* ===== 关于页专属样式 ===== */
.page-about {
  --about-grid-bg: linear-gradient(rgba(74, 144, 217, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 144, 217, 0.07) 1px, transparent 1px);
  --about-tl-node: var(--c-primary);
}

/* ---------- Hero 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: var(--space-7) 0;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--about-grid-bg);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 75% 75% at 22% 30%, #000 0%, transparent 72%);
  mask-image: radial-gradient(ellipse 75% 75% at 22% 30%, #000 0%, transparent 72%);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -160px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(57, 255, 20, 0.12) 0%, transparent 65%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: var(--space-6);
  align-items: stretch;
}

.page-about .about-hero__main {
  padding-top: var(--space-3);
  min-width: 0;
}

.page-about .about-hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: var(--size-display);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 var(--space-3);
  color: var(--c-text);
}

.page-about .about-hero__lead {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--c-text);
  margin-bottom: var(--space-2);
}

.page-about .about-hero__desc {
  color: var(--c-text-dim);
  max-width: 38em;
  line-height: 1.75;
  margin-bottom: 0;
}

.page-about .about-hero__aside {
  display: grid;
  gap: var(--space-4);
  min-width: 0;
}

.page-about .about-hero__card {
  position: relative;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  padding: var(--space-5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.page-about .about-hero__card-top {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-action);
  font-weight: 500;
  font-size: var(--size-small);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-primary);
  margin-bottom: var(--space-4);
}

.page-about .about-hero__promises {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-about .about-hero__promises li {
  position: relative;
  padding-left: 1.4em;
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: var(--size-body);
  line-height: 1.55;
}

.page-about .about-hero__promises li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--c-accent);
  font-weight: 700;
}

.page-about .about-hero__img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 1px solid var(--glass-border);
  display: block;
}

/* ---------- 公共分节头 ---------- */
.page-about .section-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.page-about .section-head .section-title {
  margin: 0;
}

.page-about .section-index {
  font-family: var(--font-body);
  font-variant-numeric: tabular-nums;
  font-size: var(--size-small);
  color: var(--c-primary);
  background: rgba(57, 255, 20, 0.1);
  border: 1px solid rgba(57, 255, 20, 0.3);
  border-radius: var(--r-sm);
  padding: 0.35em 0.6em;
  white-space: nowrap;
}

/* ---------- 01 我们是谁 ---------- */
.page-about .about-who__grid {
  display: grid;
  gap: var(--space-6);
}

.page-about .about-who__content {
  min-width: 0;
}

.page-about .about-who__content p {
  line-height: 1.75;
  margin-bottom: var(--space-3);
}

.page-about .about-who__content .lead {
  margin-bottom: var(--space-4);
}

.page-about .about-who__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.page-about .stat-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  padding: var(--space-4);
  display: grid;
  gap: var(--space-2);
  align-content: end;
  min-height: 130px;
  transition: transform var(--transition), border-color var(--transition);
}

.page-about .stat-card:hover {
  transform: translateY(-3px);
  border-color: rgba(57, 255, 20, 0.5);
}

.page-about .stat-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  line-height: 1;
  color: var(--c-text);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.page-about .stat-suffix {
  font-size: 0.55em;
  color: var(--c-primary);
  margin-left: 2px;
}

.page-about .stat-label {
  font-family: var(--font-body);
  font-size: var(--size-small);
  color: var(--c-text-dim);
  letter-spacing: 0.03em;
  line-height: 1.4;
}

/* ---------- 02 发展历程 ---------- */
.page-about .about-milestones {
  position: relative;
}

.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: var(--space-5);
  padding-left: 36px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--c-primary) 0%, var(--c-line) 60%, var(--c-ice) 100%);
  opacity: 0.55;
}

.page-about .about-timeline__item {
  position: relative;
  min-width: 0;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--about-tl-node);
  box-shadow: 0 0 0 3px rgba(57, 255, 20, 0.2), 0 0 14px var(--c-primary);
}

.page-about .about-timeline__year {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--c-accent);
  margin-bottom: var(--space-2);
}

.page-about .about-timeline__card {
  padding: var(--space-4);
  border-radius: var(--r-md);
  transition: border-color var(--transition), transform var(--transition);
}

.page-about .about-timeline__card:hover {
  border-color: rgba(57, 255, 20, 0.4);
  transform: translateY(-2px);
}

.page-about .about-timeline__card h3 {
  font-family: var(--font-display);
  font-size: var(--size-h3);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.page-about .about-timeline__card p {
  color: var(--c-text-dim);
  line-height: 1.7;
  font-size: var(--size-body);
  margin-bottom: 0;
}

.page-about .about-timeline__img {
  margin-top: var(--space-4);
  border-radius: var(--r-md);
  width: 100%;
  max-width: 200px;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--glass-border);
  display: block;
}

/* ---------- 03 数据服务能力 ---------- */
.page-about .about-capability {
  position: relative;
}

.page-about .about-cap__lead {
  max-width: 36em;
  margin-bottom: var(--space-5);
}

.page-about .about-pipeline {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.page-about .pipeline-step {
  position: relative;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-md);
  padding: var(--space-4);
  min-width: 0;
  transition: border-color var(--transition), transform var(--transition);
}

.page-about .pipeline-step:hover {
  border-color: rgba(57, 255, 20, 0.45);
  transform: translateY(-2px);
}

.page-about .pipeline-step__no {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--c-primary);
  margin-bottom: var(--space-3);
}

.page-about .pipeline-step h3 {
  font-size: var(--size-h3);
  margin-bottom: var(--space-2);
}

.page-about .pipeline-step p {
  font-size: var(--size-small);
  color: var(--c-text-dim);
  line-height: 1.65;
  margin-bottom: 0;
}

.page-about .about-cap__metrics {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.page-about .about-cap__metric {
  background: rgba(57, 255, 20, 0.06);
  border-left: 3px solid var(--c-primary);
  padding: var(--space-4);
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}

/* ---------- 04 区域坐标 ---------- */
.page-about .about-region__grid {
  display: grid;
  gap: var(--space-6);
}

.page-about .about-region__visual {
  border-radius: var(--r-lg);
  border: 1px solid var(--glass-border);
  background: linear-gradient(160deg, rgba(168, 216, 234, 0.15) 0%, rgba(31, 58, 95, 0.3) 60%);
  padding: var(--space-4);
  min-width: 0;
}

.page-about .about-region__visual svg {
  width: 100%;
  height: auto;
  display: block;
}

.page-about .about-region__caption {
  font-size: var(--size-small);
  color: var(--c-ice);
  text-align: center;
  margin-top: var(--space-3);
  letter-spacing: 0.04em;
}

.page-about .about-region__content {
  min-width: 0;
}

.page-about .about-region__content .lead {
  margin-bottom: var(--space-3);
}

.page-about .about-region__contact {
  list-style: none;
  margin: var(--space-4) 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-about .about-region__contact li {
  padding-left: 1.5em;
  position: relative;
  color: var(--c-text);
  line-height: 1.65;
  word-break: break-word;
}

.page-about .about-region__contact li::before {
  content: "❄";
  position: absolute;
  left: 0;
  color: var(--c-ice);
  font-size: 0.85rem;
}

.page-about .about-region__note {
  font-size: var(--size-small);
  margin-bottom: var(--space-3);
  line-height: 1.5;
}

/* ---------- 05 团队与组织 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: var(--space-6);
}

.page-about .about-team__content {
  min-width: 0;
}

.page-about .about-team__content .lead {
  margin-bottom: var(--space-3);
}

.page-about .about-team__scale {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-2);
  background: rgba(57, 255, 20, 0.07);
  border: 1px solid rgba(57, 255, 20, 0.25);
  border-radius: var(--r-md);
  padding: var(--space-3) var(--space-4);
  margin: var(--space-3) 0 var(--space-4);
}

.page-about .about-team__img {
  width: 100%;
  max-width: 320px;
  height: auto;
  border-radius: var(--r-lg);
  border: 1px solid var(--glass-border);
  display: block;
}

.page-about .about-team__roles {
  display: grid;
  gap: var(--space-3);
  min-width: 0;
}

.page-about .team-role {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-md);
  padding: var(--space-4);
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 0 var(--space-3);
  transition: border-color var(--transition), background var(--transition);
}

.page-about .team-role:hover {
  border-color: rgba(57, 255, 20, 0.4);
  background: rgba(57, 255, 20, 0.05);
}

.page-about .team-role__icon {
  grid-row: 1 / 3;
  align-self: start;
  font-size: 1.2rem;
  color: var(--c-primary);
}

.page-about .team-role h3 {
  margin: 0;
  font-size: var(--size-h3);
  font-weight: 700;
}

.page-about .team-role__desc {
  color: var(--c-text-dim);
  font-size: var(--size-small);
  line-height: 1.6;
  margin: var(--space-2) 0 var(--space-1);
}

.page-about .team-role__count {
  font-family: var(--font-body);
  font-size: var(--size-small);
  color: var(--c-accent);
  font-weight: 500;
}

/* ---------- 06 延伸入口 ---------- */
.page-about .about-explore__intro {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--size-h2);
  margin-bottom: var(--space-5);
  max-width: 16em;
}

.page-about .about-explore__links {
  display: grid;
  gap: var(--space-3);
}

.page-about .about-explore__link {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "no title"
    "no desc";
  column-gap: var(--space-4);
  padding: var(--space-4);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-md);
  text-decoration: none;
  transition: border-color var(--transition), transform var(--transition);
}

.page-about .about-explore__link:hover {
  border-color: var(--c-accent);
  transform: translateY(-2px);
}

.page-about .about-explore__no {
  grid-area: no;
  font-family: var(--font-body);
  font-size: var(--size-small);
  color: var(--c-accent);
}

.page-about .about-explore__title {
  grid-area: title;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--size-h3);
  color: var(--c-text);
}

.page-about .about-explore__desc {
  grid-area: desc;
  font-size: var(--size-small);
  color: var(--c-text-dim);
  line-height: 1.5;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 860px) {

  .page-about .about-hero {
    padding: var(--space-8) 0;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.9fr);
    gap: var(--space-7);
    align-items: center;
  }

  /* 发展历程：对称分割时间线 */
  .page-about .about-timeline {
    padding-left: 0;
    gap: var(--space-5);
  }

  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-timeline__item {
    width: 50%;
    padding: 0 44px;
  }

  .page-about .about-timeline__item:nth-child(odd) {
    margin-right: auto;
    text-align: right;
  }

  .page-about .about-timeline__item:nth-child(even) {
    margin-left: 50%;
    padding-left: 44px;
  }

  .page-about .about-timeline__item::before {
    left: auto;
    right: -5px;
  }

  .page-about .about-timeline__item:nth-child(even)::before {
    right: auto;
    left: -5px;
  }

  .page-about .about-timeline__img {
    margin-left: auto;
    margin-right: 0;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__img {
    margin-left: 0;
    margin-right: auto;
  }

  /* 我们是谁 */
  .page-about .about-who__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: var(--space-7);
  }

  /* 数据能力：四列管道 */
  .page-about .about-pipeline {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
  }

  .page-about .pipeline-step:not(:last-child)::after {
    content: "→";
    position: absolute;
    right: -16px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    color: var(--c-primary);
    font-size: 1rem;
    background: var(--c-bg);
    line-height: 1;
    padding: 2px 4px;
    border-radius: 4px;
  }

  .page-about .about-cap__metrics {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }

  /* 区域坐标 */
  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: var(--space-7);
    align-items: center;
  }

  /* 团队 */
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: var(--space-7);
  }

  .page-about .about-team__roles {
    gap: var(--space-4);
  }

  /* 延伸入口 */
  .page-about .about-explore__links {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
}

/* ===== 无障碍：减弱动效 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}