.page-about {
  --about-panel-gap: clamp(18px, 2.6vw, 32px);
  --about-line: 1px solid rgba(143, 160, 191, 0.2);
  --about-surface: linear-gradient(158deg, rgba(15, 34, 68, 0.74), rgba(8, 18, 38, 0.94));
  padding-block: clamp(16px, 2.4vw, 32px) clamp(48px, 7vw, 96px);
}

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

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  margin-bottom: clamp(40px, 6vw, 76px);
}

.page-about .about-hero-frame {
  position: relative;
  overflow: hidden;
  border: var(--hairline);
  border-radius: var(--radius-lg);
  background: var(--about-surface);
  box-shadow: var(--glow);
  padding: clamp(22px, 3.6vw, 52px);
  display: grid;
  gap: clamp(20px, 3vw, 38px);
}

.page-about .about-hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.42;
}

.page-about .about-hero-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(120% 95% at 6% 4%, rgba(79, 209, 224, 0.14), transparent 58%),
    linear-gradient(178deg, rgba(8, 18, 38, 0.34) 0%, rgba(8, 18, 38, 0.84) 58%, rgba(8, 18, 38, 0.97) 100%);
}

.page-about .about-hero-frame::after {
  content: "";
  position: absolute;
  left: -18%;
  top: 6%;
  width: 145%;
  height: 2px;
  z-index: 1;
  background: var(--beam);
  opacity: 0.42;
  filter: blur(0.4px);
  transform: rotate(-15deg);
  transform-origin: left center;
  pointer-events: none;
}

.page-about .about-hero-copy,
.page-about .about-hero-stats {
  position: relative;
  z-index: 2;
}

.page-about .about-hero-copy {
  max-width: 44rem;
}

.page-about .about-hero-copy .display-1 {
  margin: 12px 0 0;
  letter-spacing: 0.02em;
}

.page-about .about-hero-copy .lede {
  margin-top: clamp(14px, 1.8vw, 20px);
  max-width: 40rem;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 2.6vw, 30px);
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: 0;
  padding: clamp(16px, 2.2vw, 24px) 0 0;
  list-style: none;
  border-top: var(--about-line);
}

.page-about .hero-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .hero-stat-num {
  font-size: clamp(19px, 2.3vw, 26px);
  color: var(--gold);
  letter-spacing: 0.04em;
  line-height: 1.1;
}

.page-about .hero-stat-text {
  font-size: 13px;
  color: var(--slate);
  line-height: 1.5;
}

@media (min-width: 720px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 索引轨 + 面板列 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 44px);
}

.page-about .about-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail-link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(143, 160, 191, 0.26);
  background: rgba(15, 34, 68, 0.6);
  color: var(--slate);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  transition: color 220ms var(--ease), border-color 220ms var(--ease), background 220ms var(--ease);
}

.page-about .about-rail-link:hover,
.page-about .about-rail-link:focus-visible {
  color: var(--paper);
  border-color: rgba(232, 180, 92, 0.6);
  background: rgba(27, 36, 82, 0.8);
}

.page-about .about-rail-num {
  color: var(--gold);
  font-size: 12px;
  opacity: 0.9;
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 116px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
    flex-direction: column;
    align-items: stretch;
    overflow: visible;
    padding-bottom: 0;
    gap: 6px;
  }

  .page-about .about-rail-link {
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    justify-content: flex-start;
  }
}

/* ---------- 堆叠面板 ---------- */
.page-about .about-panels {
  min-width: 0;
}

.page-about .about-panel {
  position: relative;
  overflow: hidden;
  margin-bottom: var(--about-panel-gap);
  padding: clamp(20px, 3vw, 40px);
  border: var(--hairline);
  border-radius: var(--radius-lg);
  background: var(--about-surface);
  box-shadow: var(--glow);
}

.page-about .about-panels > .about-panel:nth-child(odd) {
  border-radius: var(--radius-lg) var(--radius-lg) 60px var(--radius-lg);
}

.page-about .about-panels > .about-panel:nth-child(even) {
  border-radius: 60px var(--radius-lg) var(--radius-lg) var(--radius-lg);
}

.page-about .about-panel--wide {
  border-radius: var(--radius-lg) !important;
  background:
    linear-gradient(120deg, rgba(27, 36, 82, 0.9), rgba(8, 18, 38, 0.96) 62%);
  border-color: rgba(232, 180, 92, 0.32);
}

.page-about .about-panel--cta {
  border-color: rgba(232, 180, 92, 0.36);
}

/* 面板头 */
.page-about .panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding-bottom: clamp(14px, 2vw, 20px);
  margin-bottom: clamp(18px, 2.6vw, 30px);
  border-bottom: var(--about-line);
}

.page-about .chapter-no {
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--gold);
  flex: 0 0 auto;
}

.page-about .panel-head-text {
  flex: 1 1 240px;
  min-width: 0;
}

.page-about .panel-title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 27px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .panel-sub {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .panel-head .tagrow {
  flex: 0 0 auto;
}

/* 正文 */
.page-about .about-body p {
  margin: 0 0 14px;
  max-width: 40em;
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.8;
  color: rgba(244, 241, 234, 0.9);
}

.page-about .about-body p:last-child {
  margin-bottom: 0;
}

.page-about .about-link {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 180, 92, 0.45);
  padding-bottom: 1px;
  transition: border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--paper);
  border-color: var(--paper);
}

/* 通用卡片网格 */
.page-about .about-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 22px);
}

@media (min-width: 720px) {
  .page-about .about-cards--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

.page-about .about-card {
  position: relative;
  padding: clamp(16px, 2.2vw, 26px);
  border: var(--about-line);
  border-radius: var(--radius-md);
  background: rgba(27, 36, 82, 0.42);
  transition: border-color 240ms var(--ease), background 240ms var(--ease);
}

.page-about .about-card:hover {
  border-color: rgba(232, 180, 92, 0.42);
  background: rgba(27, 36, 82, 0.62);
}

.page-about .about-card-no {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
  opacity: 0.85;
}

.page-about .about-card-title {
  margin: 10px 0 8px;
  font-size: clamp(16px, 1.4vw, 19px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .about-card-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(143, 160, 191, 0.96);
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: var(--beam);
  opacity: 0.5;
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 clamp(16px, 2.4vw, 24px) 34px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 9px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--deep-space);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(232, 180, 92, 0.09);
  z-index: 1;
  transition: box-shadow 240ms var(--ease);
}

.page-about .tl-item:hover::before,
.page-about .tl-item:focus-within::before {
  box-shadow: 0 0 0 7px rgba(232, 180, 92, 0.16);
}

.page-about .tl-title {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 5px;
  font-size: clamp(15px, 1.3vw, 18px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .tl-year {
  font-size: clamp(17px, 1.6vw, 22px);
  letter-spacing: 0.05em;
  color: var(--gold);
  font-weight: 400;
}

.page-about .tl-note {
  margin: 0;
  max-width: 46em;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(143, 160, 191, 0.96);
}

/* ---------- 双线结构 ---------- */
.page-about .track-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 22px);
}

@media (min-width: 760px) {
  .page-about .track-split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .track-card {
  padding: clamp(18px, 2.4vw, 28px);
  border-radius: var(--radius-md);
}

.page-about .track-card--ent {
  border: 1px solid rgba(232, 180, 92, 0.3);
  background: linear-gradient(166deg, rgba(74, 18, 38, 0.9), rgba(74, 18, 38, 0.42));
}

.page-about .track-card--fam {
  border: 1px solid rgba(79, 209, 224, 0.3);
  background: linear-gradient(166deg, rgba(11, 59, 60, 0.9), rgba(11, 59, 60, 0.42));
}

.page-about .track-label {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--paper);
  opacity: 0.9;
}

.page-about .track-list {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .track-row dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
  margin-bottom: 3px;
}

.page-about .track-card--fam .track-row dt {
  color: #4FD1E0;
}

.page-about .track-row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 241, 234, 0.88);
}

.page-about .track-foot {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding-top: clamp(14px, 2vw, 20px);
  border-top: var(--about-line);
  max-width: 46em;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(143, 160, 191, 0.96);
}

/* ---------- 图文分栏 ---------- */
.page-about .about-figure-frame {
  overflow: hidden;
  border-radius: var(--radius-md);
  border: var(--about-line);
  background: rgba(15, 34, 68, 0.6);
  margin: 0;
}

.page-about .about-figure-frame img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .team-split,
.page-about .cert-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 32px);
}

@media (min-width: 860px) {
  .page-about .team-split {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: center;
  }

  .page-about .cert-split {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    align-items: start;
  }
}

.page-about .team-copy p {
  margin: 0 0 14px;
  max-width: 40em;
  font-size: clamp(14px, 1vw, 16px);
  line-height: 1.8;
  color: rgba(244, 241, 234, 0.88);
}

.page-about .team-stats {
  list-style: none;
  margin: clamp(16px, 2vw, 22px) 0 0;
  padding: clamp(14px, 1.8vw, 18px) 0 0;
  border-top: var(--about-line);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
  gap: 12px 16px;
}

.page-about .team-stats li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .team-stat-num {
  font-size: clamp(20px, 2vw, 26px);
  color: var(--gold);
  letter-spacing: 0.04em;
  line-height: 1.1;
}

.page-about .team-stat-label {
  font-size: 12px;
  color: var(--slate);
}

/* ---------- 认证列表 ---------- */
.page-about .cert-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .cert-item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: clamp(14px, 2vw, 20px);
  border-bottom: var(--about-line);
}

.page-about .cert-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .cert-year {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--gold);
  padding-top: 2px;
}

.page-about .cert-name {
  margin: 0 0 5px;
  font-size: clamp(15px, 1.25vw, 17px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .cert-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(143, 160, 191, 0.96);
}

.page-about .cert-figure img {
  aspect-ratio: 4 / 3;
}

.page-about .cert-foot {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding-top: clamp(14px, 2vw, 20px);
  border-top: var(--about-line);
  max-width: 46em;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(143, 160, 191, 0.96);
}

/* ---------- 收束区 ---------- */
.page-about .cta-card {
  padding: clamp(18px, 2.4vw, 28px);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.page-about .cta-card--ent {
  border: 1px solid rgba(232, 180, 92, 0.3);
  background: linear-gradient(162deg, rgba(74, 18, 38, 0.84), rgba(74, 18, 38, 0.36));
}

.page-about .cta-card--fam {
  border: 1px solid rgba(79, 209, 224, 0.3);
  background: linear-gradient(162deg, rgba(11, 59, 60, 0.84), rgba(11, 59, 60, 0.36));
}

.page-about .cta-title {
  margin: 0;
  font-size: clamp(17px, 1.45vw, 20px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .cta-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 241, 234, 0.86);
}

.page-about .cta-card .btn {
  margin-top: 4px;
}

.page-about .about-contact {
  margin-top: clamp(22px, 3vw, 34px);
  padding-top: clamp(18px, 2.4vw, 26px);
  border-top: var(--about-line);
}

.page-about .about-contact-lead {
  margin: 0 0 14px;
  font-size: 14px;
  color: var(--slate);
}

.page-about .about-contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-bottom: 10px;
}

.page-about .about-contact-val {
  font-size: clamp(14px, 1.1vw, 16px);
  letter-spacing: 0.03em;
  color: var(--paper);
  word-break: break-all;
}

.page-about .about-contact-note {
  font-size: 13px;
  color: var(--slate);
}

.page-about .about-contact-more {
  margin: 14px 0 0;
  font-size: 14px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail-link,
  .page-about .about-card,
  .page-about .about-link,
  .page-about .tl-item::before {
    transition: none;
  }
}