.page-about {
  background: var(--ink);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(24px, 5vw, 56px)) 0 clamp(38px, 6vw, 68px);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(35, 211, 199, 0.14), transparent 58%),
    radial-gradient(80% 70% at 0% 100%, rgba(122, 108, 255, 0.11), transparent 62%),
    linear-gradient(180deg, var(--deep) 0%, var(--ink) 100%);
  border-bottom: 1px solid rgba(174, 187, 199, 0.16);
}

.page-about .about-hero__deco {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(174, 187, 199, 0.07) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(174, 187, 199, 0.05) 0 1px, transparent 1px 88px);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 84%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 84%);
}

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

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 5vw, 48px);
  margin-top: clamp(20px, 4vw, 34px);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 6.4vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper);
  margin: 14px 0 0;
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.85;
  color: var(--text);
}

.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

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

.page-about .about-hero__figure .media {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid rgba(35, 211, 199, 0.28);
}

.page-about .hero-stats {
  list-style: none;
  margin: clamp(28px, 5vw, 44px) 0 0;
  padding: 18px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  border-top: 1px solid rgba(35, 211, 199, 0.3);
}

.page-about .hero-stats__num {
  display: block;
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .hero-stats__key {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  padding: clamp(36px, 6vw, 80px) 0 clamp(48px, 8vw, 96px);
}

.page-about .about-rail {
  align-self: start;
}

.page-about .rail-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  border-left: 1px solid rgba(174, 187, 199, 0.22);
}

.page-about .rail-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0 10px 14px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease), transform var(--t) var(--ease);
}

.page-about .rail-list a .mono {
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .rail-list a:hover,
.page-about .rail-list a:focus-visible {
  color: var(--paper);
  border-left-color: var(--cyan);
  transform: translateX(2px);
}

.page-about .rail-note {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate);
  max-width: 22em;
}

.page-about .rail-cta {
  margin-top: 16px;
}

/* ---------- 章节 ---------- */
.page-about .chapter + .chapter {
  margin-top: clamp(40px, 7vw, 76px);
  padding-top: clamp(28px, 5vw, 46px);
  border-top: 1px solid rgba(174, 187, 199, 0.16);
}

.page-about .chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.page-about .chapter__num {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
  border: 1px solid rgba(255, 138, 61, 0.45);
  border-radius: 999px;
  padding: 4px 10px;
  line-height: 1.4;
}

.page-about .chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3.4vw, 30px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--paper);
}

.page-about .chapter p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

.page-about .chapter__figure {
  margin: 24px 0 0;
}

.page-about .chapter__figure .media {
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid rgba(94, 113, 131, 0.4);
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  position: relative;
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(35, 211, 199, 0.6), rgba(94, 113, 131, 0.2));
}

.page-about .tl-node {
  position: relative;
  padding: 0 0 24px 26px;
}

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

.page-about .tl-node__dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(35, 211, 199, 0.14);
  transition: box-shadow var(--t) var(--ease), background var(--t) var(--ease);
}

.page-about .tl-node:hover .tl-node__dot {
  box-shadow: 0 0 0 7px rgba(35, 211, 199, 0.18);
  background: var(--paper);
}

.page-about .tl-node__year {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .tl-node__title {
  margin: 6px 0 0;
  font-size: 16px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--paper);
}

.page-about .tl-node__more {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows 220ms var(--ease), opacity 220ms var(--ease);
}

.page-about .tl-node__more > span {
  overflow: hidden;
  display: block;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
  padding-top: 0;
}

.page-about .tl-node:hover .tl-node__more,
.page-about .tl-node:focus-within .tl-node__more {
  grid-template-rows: 1fr;
  opacity: 1;
}

.page-about .tl-node:hover .tl-node__more > span,
.page-about .tl-node:focus-within .tl-node__more > span {
  padding-top: 8px;
}

/* ---------- 编号归档列表 ---------- */
.page-about .code-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px dashed rgba(94, 113, 131, 0.55);
}

.page-about .code-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(94, 113, 131, 0.35);
  transition: background var(--t) var(--ease);
}

.page-about .code-list li:hover {
  background: rgba(35, 211, 199, 0.06);
}

.page-about .code-list__num {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  border: 1px solid rgba(35, 211, 199, 0.36);
  border-radius: var(--r-sm);
  padding: 2px 7px;
  line-height: 1.5;
}

.page-about .code-list__body {
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .code-list__body strong {
  color: var(--paper);
  font-weight: 700;
  margin-right: 8px;
}

/* ---------- 团队浅色章节 ---------- */
.page-about .chapter--pale {
  background: var(--paper);
  border-radius: var(--r-lg);
  padding: clamp(22px, 4vw, 36px);
  border-top: 1px solid rgba(35, 211, 199, 0.4);
  margin-top: clamp(40px, 7vw, 76px);
}

.page-about .chapter--pale .chapter__title {
  color: var(--ink);
}

.page-about .chapter--pale .chapter__num {
  color: #B8571A;
  border-color: rgba(184, 87, 26, 0.45);
}

.page-about .chapter--pale p {
  color: var(--ink-2);
}

.page-about .panel-lede,
.page-about .chapter__lede {
  margin-top: 14px;
}

.page-about .team-list {
  margin-top: 20px;
  border-top: 1px solid rgba(94, 113, 131, 0.28);
}

.page-about .team-row {
  border-bottom: 1px solid rgba(94, 113, 131, 0.28);
}

.page-about .team-row summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: baseline;
  padding: 14px 0;
  cursor: pointer;
  list-style: none;
  transition: color var(--t) var(--ease), transform var(--t) var(--ease);
}

.page-about .team-row summary::-webkit-details-marker {
  display: none;
}

.page-about .team-row summary:hover,
.page-about .team-row summary:focus-visible {
  transform: translateX(2px);
}

.page-about .team-row__num {
  grid-row: span 2;
  font-size: 22px;
  line-height: 1;
  font-weight: 700;
  color: #0E7C74;
}

.page-about .team-row__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .team-row__role {
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .team-row p {
  margin: 0 0 16px;
  padding-left: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .chapter--pale .chapter__figure .media {
  border-color: rgba(94, 113, 131, 0.3);
}

.page-about .chapter__foot {
  font-size: 14px;
  color: var(--slate) !important;
}

/* ---------- 认证 ---------- */
.page-about .cert-grid {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .cert {
  position: relative;
  padding: 16px 18px 16px 20px;
  background: var(--ink-2);
  border: 1px solid rgba(94, 113, 131, 0.45);
  border-radius: var(--r-md);
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-about .cert::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: var(--cyan);
  opacity: 0.35;
  transition: opacity var(--t) var(--ease);
}

.page-about .cert:hover {
  transform: translateY(-2px);
  border-color: rgba(35, 211, 199, 0.6);
  background: #16324a;
}

.page-about .cert:hover::before {
  opacity: 1;
}

.page-about .cert__code {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .cert__name {
  margin: 8px 0 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .cert__note {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 湖北 ---------- */
.page-about .hubei-panel {
  margin-top: 22px;
  padding: clamp(18px, 3vw, 26px);
  border-radius: var(--r-md);
  background:
    linear-gradient(135deg, rgba(35, 211, 199, 0.12), rgba(122, 108, 255, 0.08)),
    var(--ink-2);
  border: 1px solid rgba(35, 211, 199, 0.28);
}

.page-about .hubei-panel__list {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-about .hubei-panel__list > div {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(94, 113, 131, 0.45);
}

.page-about .hubei-panel__list > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .hubei-panel__list dt {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate);
}

.page-about .hubei-panel__list dd {
  margin: 0;
  font-size: 15px;
  color: var(--paper);
  word-break: break-word;
}

.page-about .hubei-panel__note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 结尾入口 ---------- */
.page-about .about-cta {
  margin-top: clamp(40px, 7vw, 72px);
  padding-top: clamp(26px, 4vw, 40px);
  border-top: 1px solid rgba(174, 187, 199, 0.18);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.6vw, 22px);
  letter-spacing: -0.01em;
  color: var(--paper);
  font-weight: 700;
}

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

.page-about .cta-card {
  display: grid;
  gap: 6px;
  padding: 18px;
  height: 100%;
  text-decoration: none;
  background: var(--ink-2);
  border: 1px solid rgba(94, 113, 131, 0.45);
  border-radius: var(--r-md);
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-about .cta-card:hover,
.page-about .cta-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cyan);
  background: #15314a;
}

.page-about .cta-card__num {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--violet);
}

.page-about .cta-card__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .cta-card__desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 窄屏：轨道改为横向索引 ---------- */
@media (max-width: 899px) {
  .page-about .about-rail {
    position: relative;
    margin-bottom: 8px;
  }

  .page-about .rail-list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    border-left: 0;
    padding: 2px 0 8px;
    -webkit-overflow-scrolling: touch;
  }

  .page-about .rail-list a {
    border-left: 0;
    border-bottom: 2px solid transparent;
    border-radius: var(--r-sm) var(--r-sm) 0 0;
    background: var(--ink-2);
    padding: 8px 12px;
    margin-left: 0;
    font-size: 13px;
  }

  .page-about .rail-list a:hover,
  .page-about .rail-list a:focus-visible {
    border-bottom-color: var(--cyan);
    transform: none;
  }

  .page-about .rail-note {
    max-width: none;
    margin-top: 12px;
  }

  .page-about .rail-cta {
    display: inline-flex;
    margin-top: 10px;
  }
}

/* ---------- 无悬停设备：摘要与细节直接展开 ---------- */
@media (hover: none) {
  .page-about .tl-node__more {
    grid-template-rows: 1fr;
    opacity: 1;
  }

  .page-about .tl-node__more > span {
    padding-top: 8px;
  }

  .page-about .tl-node__dot {
    box-shadow: 0 0 0 4px rgba(35, 211, 199, 0.14);
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .cert-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.06fr 0.94fr;
    align-items: end;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    padding-right: clamp(16px, 3vw, 34px);
  }

  .page-about .chapter--pale {
    margin-top: clamp(40px, 7vw, 76px);
  }

  .page-about .hubei-panel__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 24px;
  }

  .page-about .hubei-panel__list > div:nth-last-child(2) {
    border-bottom: 0;
    padding-bottom: 0;
  }
}
<<<END>>>