.page-about {
  --about-rail-w: 250px;
  --about-border: rgba(57, 255, 20, 0.16);
  --about-card-bg: linear-gradient(150deg, rgba(22, 50, 74, 0.78), rgba(10, 46, 42, 0.6));
  --about-glow: 0 0 26px rgba(57, 255, 20, 0.24);
  position: relative;
  background-image:
    radial-gradient(circle at 88% 4%, rgba(0, 180, 216, 0.09), transparent 320px),
    linear-gradient(rgba(57, 255, 20, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.03) 1px, transparent 1px);
  background-size: auto, 56px 56px, 56px 56px;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

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

.page-about .about-heading {
  padding: var(--space-7) var(--space-5) var(--space-5);
  max-width: calc(var(--container) + var(--space-5) * 2);
  margin: 0 auto;
  border-left: 3px solid var(--neon);
  position: relative;
}

.page-about .about-heading-inner {
  position: relative;
}

.page-about .breadcrumb {
  margin-bottom: var(--space-5);
  font-family: var(--font-data);
  font-size: 0.78rem;
  color: var(--ink-dim);
}

.page-about .breadcrumb a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--about-border);
  transition: color .2s ease, border-color .2s ease;
}

.page-about .breadcrumb a:hover {
  color: var(--neon);
  border-color: var(--neon);
}

.page-about .page-kicker {
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--neon);
  display: block;
  margin-bottom: var(--space-3);
}

.page-about .about-title {
  font-family: var(--font-head);
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  line-height: 0.95;
  color: var(--ink);
  margin: 0 0 var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  position: relative;
  display: inline-block;
}

.page-about .about-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 88px;
  height: 4px;
  background: linear-gradient(90deg, var(--neon), transparent);
  transform: skewX(-24deg);
}

.page-about .about-lead {
  max-width: 720px;
  color: var(--ink-dim);
  line-height: 1.8;
  margin: var(--space-5) 0 0;
  font-size: 1.02rem;
}

.page-about .heading-coord {
  margin-top: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.page-about .profile-layout {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-5) var(--space-5) var(--space-7);
  display: block;
}

.page-about .profile-aside {
  margin-bottom: var(--space-5);
}

.page-about .profile-rail {
  background: var(--bg-side);
  border: 1px solid var(--about-border);
  border-left: 3px solid var(--neon);
  box-shadow: var(--about-glow);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  padding: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.page-about .rail-title {
  font-family: var(--font-data);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-dim);
  display: block;
  width: 100%;
  padding: 0 var(--space-2);
}

.page-about .rail-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  color: var(--ink);
  text-decoration: none;
  font-size: 0.9rem;
  border: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

.page-about .rail-link:hover,
.page-about .rail-link[aria-current="true"] {
  color: var(--neon);
  border-color: var(--about-border);
  background: rgba(57, 255, 20, 0.06);
}

.page-about .rail-num {
  font-family: var(--font-data);
  font-size: 0.74rem;
  color: var(--neon);
  opacity: 0.85;
}

.page-about .profile-section {
  padding: var(--space-7) 0 var(--space-6);
  position: relative;
}

.page-about .profile-section + .profile-section {
  border-top: 1px solid var(--about-border);
}

.page-about .section-head {
  display: flex;
  align-items: stretch;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.page-about .section-index {
  font-family: var(--font-data);
  font-size: clamp(2.6rem, 6vw, 4rem);
  line-height: 0.9;
  color: var(--neon);
  text-shadow: 0 0 20px rgba(57, 255, 20, 0.3);
  min-width: 2ch;
  display: block;
}

.page-about .section-title-wrap {
  padding-left: var(--space-3);
  border-left: 3px solid var(--blue);
  align-self: flex-end;
}

.page-about .section-kicker {
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--blue);
  display: block;
  margin-bottom: var(--space-2);
}

.page-about .section-title-wrap h2 {
  font-family: var(--font-head);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1;
  margin: 0;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.page-about .section-lead {
  color: var(--ink-dim);
  max-width: 54em;
  margin: 0 0 var(--space-5);
  line-height: 1.8;
}

.page-about .mission-grid {
  display: grid;
  gap: var(--space-6);
}

.page-about .mission-copy p {
  color: var(--ink-dim);
  line-height: 1.85;
  margin: 0 0 var(--space-4);
}

.page-about .mission-copy p:first-child {
  color: var(--ink);
  font-size: 1.08rem;
}

.page-about .mission-media,
.page-about .culture-media,
.page-about .hunan-media {
  margin: 0;
  position: relative;
  display: block;
}

.page-about .mission-media img,
.page-about .culture-media img,
.page-about .hunan-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .milestone-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .milestone-list::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--neon), var(--blue));
  opacity: 0.55;
}

.page-about .milestone-item {
  position: relative;
  padding: 0 0 var(--space-6) calc(var(--space-6) + 10px);
}

.page-about .milestone-item:last-child {
  padding-bottom: var(--space-2);
}

.page-about .milestone-node {
  position: absolute;
  left: 1px;
  top: 2px;
  width: 16px;
  height: 16px;
  background: var(--bg-main);
  border: 3px solid var(--neon);
  transform: rotate(45deg);
  box-shadow: 0 0 12px rgba(57, 255, 20, 0.5);
}

.page-about .milestone-node::after {
  content: "";
  position: absolute;
  inset: 3px;
  background: var(--neon);
}

.page-about .milestone-card {
  background: var(--about-card-bg);
  border: 1px solid var(--about-border);
  border-left: 3px solid var(--neon);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  padding: var(--space-5);
  transition: transform .2s ease, box-shadow .2s ease;
}

.page-about .milestone-card:hover {
  transform: translateX(4px);
  box-shadow: var(--about-glow);
}

.page-about .milestone-tag {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--neon);
  background: rgba(57, 255, 20, 0.08);
  border: 1px solid var(--about-border);
  padding: var(--space-1) var(--space-2);
  margin-bottom: var(--space-3);
}

.page-about .milestone-card h3 {
  font-size: 1.16rem;
  line-height: 1.4;
  color: var(--ink);
  margin: 0 0 var(--space-2);
}

.page-about .milestone-card p {
  color: var(--ink-dim);
  line-height: 1.7;
  margin: 0;
  font-size: 0.94rem;
}

.page-about .data-dashboard {
  margin: var(--space-5) 0 var(--space-6);
}

.page-about .data-hero {
  display: grid;
  gap: var(--space-4);
}

.page-about .data-block {
  background: var(--about-card-bg);
  border: 1px solid var(--about-border);
  border-bottom: 3px solid var(--blue);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
  padding: var(--space-5);
  position: relative;
}

.page-about .data-block-cover {
  border-bottom-color: var(--neon);
  background:
    radial-gradient(circle at 90% 20%, rgba(57, 255, 20, 0.16), transparent 160px),
    var(--about-card-bg);
}

.page-about .data-number {
  font-family: var(--font-data);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1;
  color: var(--neon);
  display: block;
  font-variant-numeric: tabular-nums;
}

.page-about .data-block .data-number {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
}

.page-about .data-number small {
  font-size: 0.5em;
  color: var(--ink-dim);
  margin-left: 0.2em;
}

.page-about .data-unit {
  display: block;
  font-family: var(--font-data);
  font-size: 0.78rem;
  color: var(--blue);
  letter-spacing: 0.14em;
  margin-top: var(--space-2);
}

.page-about .data-label {
  display: block;
  color: var(--ink-dim);
  font-size: 0.84rem;
  margin-top: var(--space-1);
}

.page-about .data-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.page-about .data-cell {
  background: rgba(22, 50, 74, 0.4);
  border: 1px solid var(--about-border);
  padding: var(--space-4);
  position: relative;
}

.page-about .data-cell::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 8px;
  width: 10px;
  height: 10px;
  background: var(--orange);
  transform: rotate(45deg);
  opacity: 0.85;
}

.page-about .data-cell .data-number {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
}

.page-about .capability-list {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.page-about .capability-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: var(--space-4);
  background: rgba(22, 50, 74, 0.35);
  border: 1px solid var(--about-border);
  border-left: 4px solid var(--wine);
  padding: var(--space-4);
}

.page-about .capability-index {
  font-family: var(--font-data);
  color: var(--wine);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  padding: var(--space-2);
  border: 1px solid var(--about-border);
  background: rgba(114, 47, 55, 0.2);
  text-align: center;
  align-self: start;
}

.page-about .capability-item h3 {
  color: var(--ink);
  font-size: 1rem;
  margin: 0 0 var(--space-2);
}

.page-about .capability-item p {
  color: var(--ink-dim);
  line-height: 1.65;
  font-size: 0.9rem;
  margin: 0;
}

.page-about .culture-grid {
  display: grid;
  gap: var(--space-6);
}

.page-about .culture-copy p {
  color: var(--ink-dim);
  line-height: 1.8;
  margin: 0 0 var(--space-4);
}

.page-about .culture-copy p:first-child {
  color: var(--ink);
  font-size: 1.06rem;
}

.page-about .culture-quote {
  margin: var(--space-6) 0;
  padding: var(--space-5);
  border-left: 4px solid var(--orange);
  background: rgba(255, 107, 53, 0.07);
  position: relative;
}

.page-about .culture-quote-icon {
  font-family: var(--font-head);
  font-size: 3.4rem;
  line-height: 1;
  color: var(--orange);
  display: block;
  margin-bottom: var(--space-2);
}

.page-about .culture-quote p {
  font-size: 1.16rem;
  color: var(--ink);
  margin: 0;
}

.page-about .hunan-block {
  margin-top: var(--space-6);
  padding: var(--space-5);
  background: rgba(114, 47, 55, 0.1);
  border: 1px solid rgba(220, 38, 38, 0.2);
  border-right: 4px solid var(--red);
  display: grid;
  gap: var(--space-5);
  position: relative;
  overflow: hidden;
}

.page-about .hunan-block::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 140px;
  height: 140px;
  border: 2px solid rgba(220, 38, 38, 0.16);
  transform: rotate(18deg);
}

.page-about .hunan-copy h3 {
  font-family: var(--font-head);
  color: var(--ink);
  font-size: 1.4rem;
  margin: 0 0 var(--space-3);
}

.page-about .hunan-copy p {
  color: var(--ink-dim);
  line-height: 1.8;
  margin: 0 0 var(--space-3);
}

.page-about .profile-explore {
  margin-top: var(--space-7);
  padding-top: var(--space-6);
  border-top: 2px solid var(--about-border);
}

.page-about .profile-explore h2 {
  font-family: var(--font-head);
  color: var(--ink);
  font-size: 1.6rem;
  margin-bottom: var(--space-4);
}

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

.page-about .explore-card {
  display: grid;
  grid-template-columns: 40px 1fr;
  column-gap: var(--space-3);
  text-decoration: none;
  background: rgba(22, 50, 74, 0.5);
  border: 1px solid var(--about-border);
  padding: var(--space-4);
  transition: border-color .2s ease, transform .2s ease;
}

.page-about .explore-card:hover {
  border-color: var(--neon);
  transform: translateX(4px);
}

.page-about .explore-index {
  font-family: var(--font-data);
  color: var(--neon);
  font-size: 0.78rem;
  grid-row: span 2;
}

.page-about .explore-label {
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 600;
}

.page-about .explore-desc {
  color: var(--ink-dim);
  font-size: 0.84rem;
  grid-column: 2;
}

@media (min-width: 720px) {
  .page-about .mission-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
    gap: var(--space-6);
  }

  .page-about .culture-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
    align-items: center;
    gap: var(--space-6);
  }

  .page-about .hunan-block {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: center;
    gap: var(--space-6);
  }

  .page-about .data-hero {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .data-cell {
    padding: var(--space-5);
  }

  .page-about .capability-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .explore-links {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .page-about .profile-layout {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--space-7);
    align-items: start;
  }

  .page-about .profile-aside {
    position: sticky;
    top: var(--space-5);
    margin-bottom: 0;
  }

  .page-about .profile-rail {
    display: block;
    padding: var(--space-5);
  }

  .page-about .rail-title {
    margin-bottom: var(--space-3);
  }

  .page-about .rail-link {
    display: flex;
    width: 100%;
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--about-border);
  }

  .page-about .about-heading {
    padding-left: var(--space-6);
  }
}