.page-about {
  --about-rail: rgba(69, 224, 210, 0.22);
  --about-rail-gold: rgba(243, 178, 76, 0.5);
  --about-glass: rgba(16, 26, 61, 0.72);
  --about-violet-soft: rgba(43, 27, 82, 0.6);
}

/* ——— 面包屑与首屏 ——— */
.page-about .about-crumbs-wrap {
  padding-top: 40px;
}

.page-about .about-crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-2);
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.page-about .about-crumbs .crumb-link {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .about-crumbs .crumb-link:hover {
  color: var(--neon-cyan);
}

.page-about .about-crumbs [aria-current="page"] {
  color: var(--warm-gold);
  font-weight: 700;
}

.page-about .about-hero {
  padding-top: 32px;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}

.page-about .about-title {
  margin: 14px 0 20px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 7.5vw, 56px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--text-strong);
}

.page-about .about-lede {
  max-width: 56ch;
  color: var(--text-dim);
  font-size: var(--fs-4);
  line-height: 1.75;
  margin: 0 0 28px;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero-figures {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  padding: 1px;
  border-radius: var(--radius-m);
  background: linear-gradient(140deg, var(--about-rail), rgba(43, 27, 82, 0.9));
  overflow: hidden;
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 18px;
  background: var(--about-glass);
  backdrop-filter: blur(6px);
}

.page-about .about-figure-num {
  font-size: var(--fs-6);
  font-weight: 700;
  color: var(--warm-gold);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.page-about .about-figure-label {
  font-size: var(--fs-2);
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

/* ——— 通用小节标题 ——— */
.page-about .about-h2 {
  margin: 12px 0 16px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 4.2vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--text-strong);
}

.page-about .about-section-head {
  max-width: 62ch;
  margin-bottom: 36px;
}

.page-about .about-section-sub {
  margin: 0;
  color: var(--text-dim);
  font-size: var(--fs-3);
  line-height: 1.75;
}

/* ——— 定位 ——— */
.page-about .about-purpose-copy p {
  color: var(--text-dim);
  font-size: var(--fs-4);
  line-height: 1.78;
  margin: 0 0 16px;
}

.page-about .about-purpose-figure {
  border-radius: var(--radius-l) var(--radius-m) var(--radius-l) var(--radius-s);
  overflow: hidden;
  border: 1px solid var(--line-cyan);
  background: var(--about-violet-soft);
  margin: 0;
}

.page-about .about-purpose-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 14 / 9;
}

/* ——— 时间轴 ——— */
.page-about .about-timeline-figure {
  border-radius: var(--radius-m) var(--radius-l) var(--radius-s) var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--orbit-indigo);
  margin: 0 0 44px;
}

.page-about .about-timeline-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 12 / 7;
}

.page-about .timeline {
  position: relative;
  display: grid;
  gap: 22px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg,
    rgba(69, 224, 210, 0.65) 0%,
    rgba(69, 224, 210, 0.16) 52%,
    var(--about-rail-gold) 100%);
  opacity: 0.7;
}

.page-about .timeline-node {
  position: relative;
  padding-left: 44px;
}

.page-about .timeline-rail {
  position: absolute;
  left: 0;
  top: 10px;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
}

.page-about .timeline-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 0 4px rgba(69, 224, 210, 0.14), 0 0 16px rgba(69, 224, 210, 0.55);
  animation: aboutPulse 6s ease-in-out infinite;
}

.page-about .timeline-dot--gold {
  background: var(--warm-gold);
  box-shadow: 0 0 0 5px rgba(243, 178, 76, 0.16), 0 0 20px rgba(243, 178, 76, 0.6);
}

@keyframes aboutPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.14); opacity: 0.82; }
}

.page-about .timeline-body {
  padding: 18px 20px 16px;
  border-radius: var(--radius-m);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, var(--about-violet-soft), rgba(6, 10, 28, 0.55));
  border-left: 2px solid var(--about-rail);
}

.page-about .timeline-node--gold .timeline-body {
  border-left-color: var(--about-rail-gold);
  box-shadow: 0 0 0 1px rgba(243, 178, 76, 0.08);
}

.page-about .timeline-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .timeline-year {
  font-size: var(--fs-3);
  font-weight: 700;
  color: var(--neon-cyan-soft);
  letter-spacing: 0.08em;
}

.page-about .timeline-node--gold .timeline-year {
  color: var(--warm-gold);
}

.page-about .timeline-heading {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-about .timeline-panel .panel-trigger,
.page-about .panel-trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 4px 0 6px;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  color: var(--text-strong);
}

.page-about .panel-index {
  flex: 0 0 auto;
  font-size: var(--fs-2);
  letter-spacing: 0.14em;
  color: var(--text-dim);
}

.page-about .timeline-title {
  flex: 1 1 auto;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-5);
  letter-spacing: -0.01em;
  color: var(--text-strong);
}

.page-about .panel-trigger:hover .timeline-title {
  color: var(--neon-cyan);
}

.page-about .panel-caret {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--text-dim);
  border-bottom: 2px solid var(--text-dim);
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.2s ease;
}

.page-about .panel-trigger[aria-expanded="true"] .panel-caret {
  transform: rotate(225deg) translateY(-2px);
}

.page-about .panel-body {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.22s ease;
}

.page-about .panel-trigger[aria-expanded="true"] + .panel-body {
  max-height: 26rem;
}

.page-about .panel-body-inner p {
  margin: 0 0 6px;
  color: var(--text-dim);
  font-size: var(--fs-3);
  line-height: 1.78;
}

/* ——— 团队 ——— */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .about-team-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 22px;
  border-radius: var(--radius-m) var(--radius-s) var(--radius-m) var(--radius-l);
  border: 1px solid var(--line);
  background: var(--about-glass);
}

.page-about .about-team-card--violet {
  background: linear-gradient(155deg, var(--about-violet-soft), rgba(6, 10, 28, 0.5));
  border-color: rgba(43, 27, 82, 0.9);
}

.page-about .about-team-card--gold {
  border-color: var(--line-gold);
  background: linear-gradient(155deg, rgba(243, 178, 76, 0.07), rgba(6, 10, 28, 0.5));
}

.page-about .about-team-tag,
.page-about .about-partner-tag {
  font-size: var(--fs-1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--neon-cyan);
}

.page-about .about-team-card--gold .about-team-tag {
  color: var(--warm-gold);
}

.page-about .about-team-card h3 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: var(--fs-5);
  color: var(--text-strong);
}

.page-about .about-team-card p {
  margin: 0;
  color: var(--text-dim);
  font-size: var(--fs-3);
  line-height: 1.75;
}

.page-about .about-team-list {
  list-style: none;
  margin: 6px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 8px;
}

.page-about .about-team-list li {
  position: relative;
  padding-left: 16px;
  font-size: var(--fs-2);
  color: var(--text-dim);
  letter-spacing: 0.02em;
}

.page-about .about-team-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--neon-cyan);
  opacity: 0.7;
}

.page-about .about-team-card--gold .about-team-list li::before {
  background: var(--warm-gold);
}

/* ——— 服务网络 ——— */
.page-about .about-service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: start;
}

.page-about .about-service-figure {
  margin: 0;
  border-radius: var(--radius-l) var(--radius-s) var(--radius-l) var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--line-cyan);
  background: var(--orbit-indigo);
}

.page-about .about-service-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .about-service-copy p {
  color: var(--text-dim);
  font-size: var(--fs-3);
  line-height: 1.78;
  margin: 0 0 18px;
}

.page-about .about-service-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-service-list li {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 12px 14px;
  border-radius: var(--radius-s);
  background: rgba(16, 26, 61, 0.55);
  border-left: 2px solid var(--about-rail);
}

.page-about .about-service-list li:last-child {
  border-left-color: var(--about-rail-gold);
}

.page-about .about-service-key {
  font-size: var(--fs-3);
  font-weight: 700;
  color: var(--neon-cyan);
  letter-spacing: 0.08em;
}

.page-about .about-service-key--gold {
  color: var(--warm-gold);
}

.page-about .about-service-val {
  font-size: var(--fs-3);
  color: var(--text-dim);
  line-height: 1.7;
}

.page-about .about-service-note {
  font-size: var(--fs-2);
  line-height: 1.75;
  margin: 0;
}

/* ——— 更新节奏 ——— */
.page-about .about-rhythm-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

.page-about .about-rhythm-copy p {
  color: var(--text-dim);
  font-size: var(--fs-4);
  line-height: 1.78;
  margin: 0;
}

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

.page-about .about-rhythm-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-rhythm-item:first-child {
  border-top: 1px solid var(--line);
}

.page-about .about-rhythm-time {
  font-size: var(--fs-3);
  font-weight: 700;
  color: var(--neon-cyan);
  letter-spacing: 0.04em;
}

.page-about .about-rhythm-item--gold .about-rhythm-time {
  color: var(--warm-gold);
}

.page-about .about-rhythm-text {
  font-size: var(--fs-3);
  color: var(--text-dim);
  line-height: 1.72;
}

/* ——— 内容共建 ——— */
.page-about .about-partners-head {
  max-width: 62ch;
  margin-bottom: 32px;
}

.page-about .about-partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-partner-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 20px;
  border-radius: var(--radius-s) var(--radius-m) var(--radius-l) var(--radius-s);
  border: 1px solid var(--line);
  background: var(--about-glass);
}

.page-about .about-partner-card h3 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: var(--fs-5);
  color: var(--text-strong);
}

.page-about .about-partner-card p {
  margin: 0;
  color: var(--text-dim);
  font-size: var(--fs-3);
  line-height: 1.75;
}

.page-about .about-partner-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ——— 平板 ——— */
@media (min-width: 720px) {
  .page-about .about-crumbs-wrap {
    padding-top: 56px;
  }

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

  .page-about .about-team-grid,
  .page-about .about-partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-rhythm-item {
    grid-template-columns: 190px 1fr;
    gap: 20px;
    align-items: baseline;
  }

  .page-about .about-service-list li {
    grid-template-columns: 96px 1fr;
  }
}

/* ——— 桌面 ——— */
@media (min-width: 1000px) {
  .page-about .about-hero-grid {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    align-items: end;
  }

  .page-about .about-hero-figures {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-purpose-grid {
    align-items: center;
  }

  .page-about .about-team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-service-grid {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .about-rhythm-grid {
    grid-template-columns: 4fr 8fr;
    gap: 48px;
  }

  .page-about .about-purpose-figure img {
    aspect-ratio: 14 / 9;
  }
}

@media (min-width: 1240px) {
  .page-about .about-hero-grid {
    grid-template-columns: 8fr 4fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline-dot {
    animation: none;
  }

  .page-about .panel-caret,
  .page-about .panel-body {
    transition: none;
  }
}