.page-about .about-hero {
  position: relative;
  min-height: 540px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 120px 0 48px;
  background: var(--c-deep);
  color: var(--c-white);
  overflow: hidden;
}
.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}
.page-about .about-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.4;
}
.page-about .about-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 19, 43, 0.78) 0%, rgba(10, 31, 68, 0.45) 55%, rgba(6, 19, 43, 0.92) 100%);
}
.page-about .about-hero .container {
  position: relative;
  z-index: 2;
}
.page-about .about-hero .breadcrumb {
  margin-bottom: 24px;
  color: rgba(255, 255, 255, 0.65);
}
.page-about .about-hero .breadcrumb a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration-color: rgba(255, 255, 255, 0.4);
}
.page-about .about-hero .breadcrumb__sep {
  margin: 0 8px;
  opacity: 0.7;
}
.page-about .about-hero__text {
  max-width: 720px;
}
.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 8vw, 4.6rem);
  line-height: 1;
  margin: 14px 0 6px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.page-about .about-hero h1 em {
  display: block;
  font-family: var(--font-body);
  font-style: normal;
  font-weight: 500;
  font-size: clamp(1rem, 2.4vw, 1.5rem);
  line-height: 1.4;
  text-transform: none;
  letter-spacing: 0.12em;
  color: var(--c-neon);
  margin-top: 8px;
}
.page-about .about-hero__lead {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 700;
  margin: 24px 0 12px;
  padding-left: 16px;
  border-left: 4px solid var(--c-orange);
}
.page-about .about-hero__desc {
  max-width: 560px;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.8;
  margin: 0 0 24px;
}
.page-about .about-hero .btn-ghost {
  border-color: var(--c-white);
  color: var(--c-white);
}
.page-about .about-hero .btn-ghost:hover {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-white);
}
.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}
.page-about .about-hero__meta span {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 6px 12px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 2px;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--c-orange) 0 56px, transparent 56px 64px);
  z-index: 3;
}
.page-about .about-hero__mark {
  position: absolute;
  right: 18px;
  top: 32%;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: rgba(255, 255, 255, 0.55);
  border-right: 1px solid rgba(255, 255, 255, 0.25);
  padding-right: 10px;
  z-index: 2;
}

.page-about .about-page-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 14px 20px;
  background: var(--c-light);
  border-bottom: 1px solid var(--c-border);
  scrollbar-width: none;
}
.page-about .about-page-nav::-webkit-scrollbar {
  display: none;
}
.page-about .about-page-nav a {
  white-space: nowrap;
  font-size: 13px;
  text-decoration: none;
  color: var(--c-deep);
  padding: 6px 10px;
  border: 1px solid var(--c-border);
  background: var(--c-white);
  font-weight: 600;
}

.page-about .about-mission {
  position: relative;
  padding: 64px 0;
  background-color: var(--c-light);
  border-bottom: 1px solid var(--c-border);
}
.page-about .about-mission::after {
  content: "ARCHIVE";
  position: absolute;
  right: 14px;
  top: 24px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--c-orange);
  transform: rotate(90deg);
  transform-origin: right top;
}
.page-about .about-mission__grid {
  display: grid;
  gap: 48px;
}
.page-about .about-mission__slogan {
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  line-height: 1.1;
  color: var(--c-deep);
  margin: 16px 0 20px;
  display: inline-block;
  position: relative;
}
.page-about .about-mission__slogan::after {
  content: "";
  position: absolute;
  right: -46px;
  top: 6px;
  width: 32px;
  height: 32px;
  background: var(--c-neon);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
}
.page-about .about-mission__copy {
  color: var(--c-gray);
  line-height: 1.9;
  margin: 0;
  max-width: 540px;
}
.page-about .about-mission__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-mission__item {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--c-border);
}
.page-about .about-mission__item:last-child {
  border-bottom: 1px solid var(--c-border);
}
.page-about .about-mission__item-body {
  min-width: 0;
}
.page-about .about-mission__index {
  font-family: var(--font-num);
  color: var(--c-orange);
  font-size: 14px;
  line-height: 1.6;
}
.page-about .about-mission__item h3 {
  margin: 0 0 6px;
  font-size: 1.1rem;
  color: var(--c-deep);
}
.page-about .about-mission__item p {
  margin: 0;
  color: var(--c-gray);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .about-data {
  position: relative;
  padding: 72px 0;
  background: var(--c-deep);
  color: var(--c-white);
  overflow: hidden;
}
.page-about .about-data::after {
  content: "DATA";
  position: absolute;
  right: 0;
  top: 20px;
  background: var(--c-orange);
  color: var(--c-white);
  font-family: var(--font-num);
  font-size: 12px;
  padding: 6px 16px;
  border-radius: 2px 0 0 2px;
  letter-spacing: 0.2em;
}
.page-about .about-data .container {
  position: relative;
}
.page-about .about-data .section-head h2 {
  color: var(--c-white);
}
.page-about .about-data .section-head .eyebrow {
  color: var(--c-neon);
}
.page-about .about-data .section-head .side-note {
  color: rgba(255, 255, 255, 0.5);
}
.page-about .about-data__intro {
  max-width: 720px;
  font-size: 1.05rem;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.85);
}
.page-about .about-data__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 40px 0;
}
.page-about .about-data__stat {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 24px 10px;
  text-align: center;
  transition: background var(--transition), border-color var(--transition);
}
.page-about .about-data__stat:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(57, 255, 20, 0.4);
}
.page-about .about-data__stat .stat-number {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: var(--c-neon);
  display: block;
  line-height: 1.2;
}
.page-about .about-data__stat-label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.65);
}
.page-about .about-data__chart {
  margin: 48px 0 24px;
  padding: 24px 16px;
  background: rgba(255, 255, 255, 0.04);
  border-left: 4px solid var(--c-orange);
}
.page-about .about-data__chart-title {
  font-family: var(--font-head);
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: var(--c-white);
  margin: 0 0 20px;
}
.page-about .about-data__chart-row {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
}
.page-about .about-data__chart-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
}
.page-about .about-data__chart-bar {
  display: block;
  height: 18px;
  background: linear-gradient(90deg, var(--c-orange), rgba(255, 107, 53, 0.55));
}
.page-about .about-data__chart-bar--now {
  background: linear-gradient(90deg, var(--c-neon), rgba(57, 255, 20, 0.45));
}
.page-about .about-data__bottom {
  display: grid;
  gap: 40px;
  margin-top: 56px;
}
.page-about .about-data__points h3 {
  font-family: var(--font-head);
  font-size: 1.5rem;
  color: var(--c-white);
  margin: 0 0 20px;
  letter-spacing: 0.04em;
}
.page-about .about-data__points ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-data__points li {
  padding: 14px 0 14px 28px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.16);
  color: rgba(255, 255, 255, 0.86);
  line-height: 1.7;
  position: relative;
}
.page-about .about-data__points li::before {
  content: "›";
  position: absolute;
  left: 4px;
  top: 10px;
  color: var(--c-neon);
  font-family: var(--font-num);
  font-size: 24px;
}
.page-about .about-data__figure {
  margin: 0;
}
.page-about .about-data__figure img {
  width: 100%;
  height: auto;
  display: block;
  background: rgba(255, 255, 255, 0.06);
}
.page-about .about-data__figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  border-left: 3px solid var(--c-neon);
  padding-left: 12px;
}

.page-about .about-history {
  padding: 72px 0;
  background: var(--c-white);
}
.page-about .about-history__intro {
  color: var(--c-gray);
  max-width: 640px;
  line-height: 1.8;
}
.page-about .about-history__grid {
  margin-top: 44px;
}
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 18px;
  width: 2px;
  background: var(--c-border);
}
.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 32px 56px;
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__num {
  position: absolute;
  left: 0;
  top: 0;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--c-deep);
  color: var(--c-neon);
  font-family: var(--font-num);
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--c-white);
  box-shadow: 0 0 0 2px var(--c-border);
}
.page-about .about-timeline__body {
  background: var(--c-light);
  border: 1px solid var(--c-border);
  padding: 18px 20px;
  box-shadow: var(--shadow-1);
  transition: transform var(--transition), box-shadow var(--transition);
}
.page-about .about-timeline__body:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2);
}
.page-about .about-timeline__body h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--c-deep);
}
.page-about .about-timeline__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-gray);
}
.page-about .about-timeline__more {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  margin: 0;
  transition: max-height 0.4s ease, opacity 0.3s ease, margin 0.3s ease;
  border-top: 1px dashed var(--c-border);
  padding-top: 0;
}
.page-about .about-timeline__item:hover .about-timeline__more,
.page-about .about-timeline__item:focus-within .about-timeline__more {
  max-height: 220px;
  opacity: 1;
  margin-top: 12px;
  padding-top: 12px;
}
.page-about .about-history__figure {
  margin: 32px 0 0;
}
.page-about .about-history__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}
.page-about .about-history__figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--c-gray);
  border-left: 3px solid var(--c-orange);
  padding-left: 12px;
  line-height: 1.6;
}
.page-about .about-history__figure figcaption a {
  color: var(--c-orange);
}

.page-about .about-credential {
  background: var(--c-light);
  padding: 72px 0;
}
.page-about .about-credential__panel {
  position: relative;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  box-shadow: var(--shadow-1);
  padding: 52px 24px 28px;
  margin-top: 18px;
}
.page-about .about-credential__panel::before {
  content: "档案";
  position: absolute;
  top: -14px;
  left: 24px;
  width: 96px;
  height: 30px;
  background: var(--c-orange);
  color: var(--c-white);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  display: flex;
  align-items: center;
  justify-content: center;
  clip-path: polygon(4% 0, 100% 0, 100% 100%, 50% 76%, 0 100%);
}
.page-about .about-credential__seal {
  text-align: center;
  border: 2px dashed var(--c-border);
  padding: 32px 12px;
  margin-bottom: 24px;
}
.page-about .about-credential__icp {
  font-family: var(--font-num);
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 700;
  color: var(--c-deep);
  margin: 12px 0 8px;
}
.page-about .about-credential__seal p:last-child {
  font-size: 13px;
  color: var(--c-gray);
  line-height: 1.6;
}
.page-about .about-credential__facts ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-credential__facts li {
  padding: 10px 0 10px 24px;
  border-bottom: 1px solid var(--c-border);
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-dark);
  position: relative;
}
.page-about .about-credential__facts li::before {
  content: "✓";
  color: var(--c-orange);
  position: absolute;
  left: 0;
  top: 10px;
  font-family: var(--font-num);
}
.page-about .about-credential__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}
.page-about .about-credential__foot {
  margin-top: 32px;
  padding: 16px 20px;
  background: var(--c-deep);
  color: var(--c-neon);
  font-family: var(--font-num);
  font-size: 13px;
  text-align: center;
  letter-spacing: 0.04em;
}

@media (hover: none), (max-width: 767px) {
  .page-about .about-timeline__more {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
    padding-top: 12px;
  }
}

@media (min-width: 720px) {
  .page-about .about-hero__mark {
    right: 32px;
    top: 30%;
  }
  .page-about .about-data__stats {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 980px) {
  .page-about .about-mission {
    padding: 96px 0;
  }
  .page-about .about-mission__grid {
    grid-template-columns: 1.1fr 1fr;
    gap: 80px;
    align-items: center;
  }
  .page-about .about-data {
    padding: 96px 0;
  }
  .page-about .about-credential {
    padding: 96px 0;
  }
  .page-about .about-credential__panel {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 40px;
    align-items: center;
    padding: 48px 40px;
  }
  .page-about .about-credential__seal {
    margin-bottom: 0;
  }
}

@media (min-width: 1000px) {
  .page-about .about-data__bottom {
    grid-template-columns: 1.2fr 0.9fr;
    gap: 64px;
    align-items: center;
  }
}

@media (min-width: 1100px) {
  .page-about .about-history {
    padding: 96px 0;
  }
  .page-about .about-history__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 40px;
    align-items: start;
  }
  .page-about .about-history__figure {
    margin: 0;
  }
  .page-about .about-timeline {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
  }
  .page-about .about-timeline::before {
    top: 19px;
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    height: 2px;
  }
  .page-about .about-timeline__item {
    padding: 52px 4px 0;
  }
  .page-about .about-timeline__num {
    left: 4px;
    top: 0;
  }
  .page-about .about-timeline__body {
    padding: 14px 12px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-data__stats {
    grid-template-columns: repeat(6, 1fr);
  }
}

@media (min-width: 1280px) {
  .page-about .about-page-nav {
    position: fixed;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: 0;
    padding: 0;
    overflow: visible;
    z-index: 40;
  }
  .page-about .about-page-nav a {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-size: 12px;
    letter-spacing: 0.24em;
    color: rgba(10, 31, 68, 0.5);
    text-decoration: none;
    padding: 10px 6px;
    border-right: 2px solid transparent;
    border-left: 0;
    white-space: normal;
    transition: color var(--transition), border-color var(--transition);
  }
  .page-about .about-page-nav a:hover,
  .page-about .about-page-nav a:focus-visible {
    color: var(--c-orange);
    border-color: var(--c-orange);
  }
}