.page-about {
  --about-rail: 104px;
  --about-rule: rgba(25, 227, 209, 0.22);
  --about-panel: linear-gradient(152deg, rgba(18, 50, 75, 0.78), rgba(10, 37, 64, 0.5));
  padding-bottom: 88px;
  overflow-x: clip;
}

/* ---------------- 通用章节头 ---------------- */
.page-about .about-head {
  max-width: 60ch;
  margin-bottom: 34px;
}

.page-about .about-head__lead {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .eyebrow {
  margin: 0 0 10px;
}

.page-about .section-title {
  margin: 0;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.24;
  letter-spacing: -0.01em;
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  font-size: 13px;
  color: var(--muted);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s 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 {
  opacity: 0.45;
}

/* ---------------- 首屏框景 ---------------- */
.page-about .about-hero {
  padding-top: 30px;
}

.page-about .about-hero__frame {
  position: relative;
  border-radius: var(--radius-l);
  padding: 24px 20px 28px;
  overflow: hidden;
  background:
    radial-gradient(120% 110% at 4% 0%, rgba(25, 227, 209, 0.16), transparent 56%),
    radial-gradient(90% 90% at 100% 100%, rgba(255, 107, 44, 0.1), transparent 60%),
    linear-gradient(158deg, var(--ink-800), var(--ink-900) 72%);
  border: 1px solid var(--line);
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    linear-gradient(rgba(25, 227, 209, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(25, 227, 209, 0.055) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(120% 100% at 100% 0%, #000, transparent 72%);
  -webkit-mask-image: radial-gradient(120% 100% at 100% 0%, #000, transparent 72%);
}

.page-about .about-hero__scale {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 6px;
  padding-bottom: 12px;
  margin-bottom: 22px;
  border-bottom: 1px dashed var(--about-rule);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(28px, 6.2vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 800;
  background: linear-gradient(120deg, var(--text) 38%, var(--cyan-soft) 78%, var(--cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: #cbdde8;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-fact__num {
  font-size: clamp(22px, 5vw, 30px);
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}

.page-about .about-fact:nth-child(2) .about-fact__num {
  color: var(--orange-soft);
}

.page-about .about-fact__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-hero__media {
  margin: 20px 0 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--line-soft);
}

/* ---------------- 时间轴 ---------------- */
.page-about .about-timeline {
  padding-top: 84px;
}

.page-about .about-rail-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-rail__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__item {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  background: rgba(18, 50, 75, 0.5);
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .about-rail__item em {
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.05em;
}

.page-about .about-rail__item span.num {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-rail__item:hover,
.page-about .about-rail__item:focus-visible {
  border-color: rgba(25, 227, 209, 0.6);
  color: var(--cyan);
}

.page-about .about-rail__item.is-active {
  border-color: var(--cyan);
  background: rgba(25, 227, 209, 0.12);
}

.page-about .about-rail__item.is-active span.num {
  color: var(--cyan);
}

.page-about .about-tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 26px;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(25, 227, 209, 0.22) 62%, rgba(25, 227, 209, 0));
}

.page-about .about-tl__node {
  position: relative;
  padding-left: 28px;
}

.page-about .about-tl__dot {
  position: absolute;
  left: 0;
  top: 26px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-tl__node:hover .about-tl__dot,
.page-about .about-tl__node:focus-within .about-tl__dot {
  transform: scale(1.32);
  box-shadow: 0 0 0 7px rgba(25, 227, 209, 0.14);
}

.page-about .about-tl__box {
  border-radius: var(--radius-m);
  padding: 20px 20px 22px;
  background: var(--about-panel);
  border: 1px solid var(--line-soft);
  transition: border-color 0.28s var(--ease), transform 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.page-about .about-tl__node:hover .about-tl__box {
  border-color: rgba(25, 227, 209, 0.45);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-tl__box .tag {
  display: inline-block;
}

.page-about .about-tl__box h3 {
  margin: 14px 0 10px;
  font-size: 19px;
  line-height: 1.42;
}

.page-about .about-tl__box p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: #c3d6e2;
}

.page-about .about-tl__state {
  margin-top: 16px !important;
  padding-top: 13px;
  border-top: 1px dashed var(--about-rule);
  font-size: 13.5px !important;
  color: var(--muted) !important;
}

/* ---------------- 增长曲线 ---------------- */
.page-about .about-growth {
  margin: 40px 0 0;
  padding: 20px 18px 16px;
  border-radius: var(--radius-m);
  border: 1px solid var(--line-soft);
  background: linear-gradient(160deg, rgba(10, 37, 64, 0.72), rgba(4, 18, 31, 0.6));
}

.page-about .about-growth__cap {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.page-about .about-growth__num {
  font-size: 26px;
  font-weight: 700;
  color: var(--orange);
}

.page-about .about-growth__txt {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

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

.page-about .about-growth__grid line {
  stroke: rgba(143, 169, 188, 0.16);
  stroke-width: 1;
  stroke-dasharray: 3 6;
}

.page-about .about-growth__line {
  stroke: var(--cyan);
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.page-about .about-growth__dots circle {
  fill: var(--ink-900);
  stroke: var(--cyan);
  stroke-width: 2;
}

.page-about .about-growth__dots circle:last-child {
  fill: var(--orange);
  stroke: var(--orange-soft);
}

.page-about .about-growth__axis {
  margin: 8px 0 0;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-align: center;
}

/* ---------------- 橙色主题带 ---------------- */
.page-about .about-band {
  margin: 60px 0;
  padding: 26px 0;
  background:
    linear-gradient(96deg, rgba(255, 107, 44, 0.2), rgba(255, 178, 122, 0.08) 52%, transparent 88%),
    linear-gradient(120deg, var(--ink-800), var(--ink-900));
  border-top: 1px solid rgba(255, 107, 44, 0.34);
  border-bottom: 1px solid rgba(255, 107, 44, 0.34);
}

.page-about .about-band__inner {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-band__kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange-soft);
}

.page-about .about-band__line {
  margin: 0;
  font-size: clamp(16px, 2.5vw, 20px);
  line-height: 1.7;
  color: var(--text);
}

.page-about .about-band__line strong {
  font-family: var(--font-mono);
  font-size: 1.22em;
  color: var(--orange);
  padding: 0 2px;
}

/* ---------------- 团队 ---------------- */
.page-about .about-team {
  padding-top: 6px;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-team__card {
  position: relative;
  border-radius: var(--radius-m);
  padding: 22px 20px 24px;
  background: var(--about-panel);
  border: 1px solid var(--line-soft);
  overflow: hidden;
  transition: border-color 0.28s var(--ease), transform 0.28s var(--ease);
}

.page-about .about-team__card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--cyan), transparent 78%);
  opacity: 0.7;
}

.page-about .about-team__card:hover {
  border-color: rgba(25, 227, 209, 0.45);
  transform: translateY(-3px);
}

.page-about .about-team__card--lead {
  background:
    radial-gradient(110% 130% at 100% 0%, rgba(25, 227, 209, 0.14), transparent 62%),
    var(--about-panel);
  border-color: rgba(25, 227, 209, 0.32);
}

.page-about .about-team__card--lead::before {
  background: linear-gradient(180deg, var(--orange), transparent 78%);
}

.page-about .about-team__n {
  display: block;
  font-size: clamp(32px, 7vw, 48px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .about-team__card--lead .about-team__n {
  color: var(--orange);
}

.page-about .about-team__card h3 {
  margin: 12px 0 10px;
  font-size: 18px;
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: #c3d6e2;
}

.page-about .about-team__note {
  margin-top: 14px !important;
  padding-top: 12px;
  border-top: 1px dashed var(--about-rule);
  font-size: 13px !important;
  color: var(--muted) !important;
}

/* ---------------- 流程 ---------------- */
.page-about .about-flow {
  padding-top: 88px;
}

.page-about .about-flow__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-flow__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 4px;
  counter-reset: flowstep;
}

.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 16px;
  border-radius: var(--radius-s);
  border-left: 2px solid rgba(25, 227, 209, 0.24);
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-about .about-flow__step:hover {
  border-left-color: var(--cyan);
  background: rgba(18, 50, 75, 0.48);
}

.page-about .about-flow__idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--line);
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan);
  background: rgba(4, 18, 31, 0.6);
}

.page-about .about-flow__body h3 {
  margin: 6px 0 8px;
  font-size: 17px;
}

.page-about .about-flow__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: #c3d6e2;
}

.page-about .about-flow__media {
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  align-self: start;
}

/* ---------------- 年度回顾 ---------------- */
.page-about .about-annual {
  padding-top: 90px;
}

.page-about .about-annual__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-annual__media {
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  margin: 0;
}

.page-about .about-annual__body p {
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: #c3d6e2;
}

.page-about .about-annual__list {
  margin: 22px 0 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px dashed var(--about-rule);
  display: grid;
  gap: 12px;
}

.page-about .about-annual__list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.65;
  color: #c3d6e2;
}

.page-about .about-annual__list .num {
  flex: none;
  min-width: 52px;
  font-size: 19px;
  font-weight: 700;
  color: var(--orange-soft);
}

.page-about .about-annual__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

/* ---------------- 结尾 ---------------- */
.page-about .about-cta {
  padding-top: 72px;
}

.page-about .about-cta__inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 28px;
  padding: 26px 22px;
  border-radius: var(--radius-l);
  border: 1px solid var(--line);
  background:
    radial-gradient(110% 120% at 0% 0%, rgba(25, 227, 209, 0.14), transparent 58%),
    linear-gradient(150deg, var(--ink-800), var(--ink-900));
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-size: clamp(20px, 3.4vw, 26px);
  line-height: 1.32;
}

.page-about .about-cta__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 58ch;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------------- 响应式 ---------------- */
@media (min-width: 680px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-team__card--lead {
    grid-column: 1 / -1;
  }

  .page-about .about-cta__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 30px 28px;
  }

  .page-about .about-cta__links {
    flex: none;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__frame {
    padding: 32px 34px 36px;
  }

  .page-about .about-rail-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 42px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 2px;
    padding: 0 0 0 14px;
    border-left: 1px solid var(--line);
    overflow: visible;
  }

  .page-about .about-rail__item {
    border: none;
    background: none;
    border-radius: 0;
    padding: 7px 0;
    position: relative;
  }

  .page-about .about-rail__item::before {
    content: "";
    position: absolute;
    left: -15px;
    top: 50%;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--line-soft);
    transform: translateY(-50%);
    transition: background 0.22s var(--ease), transform 0.22s var(--ease);
  }

  .page-about .about-rail__item.is-active::before {
    background: var(--cyan);
    transform: translateY(-50%) scale(1.7);
  }

  .page-about .about-rail__item:hover,
  .page-about .about-rail__item.is-active {
    background: none;
    border-color: transparent;
  }

  .page-about .about-rail__item em {
    font-size: 12px;
  }

  .page-about .about-tl__box {
    padding: 24px 26px 26px;
  }

  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    gap: 36px;
  }

  .page-about .about-annual__grid {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 44px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: 44px;
  }

  .page-about .about-hero__media {
    margin-top: 24px;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-team__card--lead {
    grid-column: 1 / span 5;
    grid-row: 1 / span 2;
  }

  .page-about .about-team__card:nth-child(2) {
    grid-column: 6 / span 7;
    grid-row: 1;
  }

  .page-about .about-team__card:nth-child(3) {
    grid-column: 6 / span 3;
    grid-row: 2;
  }

  .page-about .about-team__card:nth-child(4) {
    grid-column: 9 / span 4;
    grid-row: 2;
  }

  .page-about .about-flow__step {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 18px;
    padding: 20px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__dot,
  .page-about .about-tl__box,
  .page-about .about-team__card,
  .page-about .about-flow__step {
    transition: none;
  }

  .page-about .about-tl__node:hover .about-tl__dot {
    transform: none;
  }
}
<<<END>>>