.page-about {
  --about-gold: #C9A227;
  --about-gold-light: #E1B830;
  --about-green: #0B3D2E;
  --about-green-dark: #08251D;
  --about-paper: #F7F3EC;
  --about-border: #D8CFC0;
  --about-text-secondary: #5A6B62;
  --about-mono: 'Roboto Mono', 'Courier New', monospace;
  --about-sans: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--about-paper);
  color: var(--about-green);
  overflow-x: clip;
}

.page-about__hero {
  background:
    radial-gradient(ellipse 80% 60% at 85% 20%, rgba(201, 162, 39, 0.18) 0%, rgba(201, 162, 39, 0) 60%),
    linear-gradient(135deg, #08251D 0%, #0B3D2E 55%, #0F4A38 100%);
  color: #F7F3EC;
  padding: 80px 0 72px;
  position: relative;
}

.page-about__hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--about-gold) 0%, var(--about-gold) 40%, rgba(201, 162, 39, 0.3) 100%);
}

.page-about__hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

.page-about__breadcrumb {
  margin-bottom: 32px;
  font-family: var(--about-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: rgba(247, 243, 236, 0.65);
}

.page-about__breadcrumb .breadcrumb__item[aria-current="page"] {
  color: var(--about-gold-light);
}

.page-about__kicker {
  color: var(--about-gold-light);
  margin-bottom: 12px;
  font-family: var(--about-mono);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
}

.page-about__title {
  font-size: clamp(2rem, 5.5vw, 3.4rem);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0 0 20px;
  max-width: 14em;
}

.page-about__lead {
  font-size: clamp(1.02rem, 2.4vw, 1.25rem);
  line-height: 1.8;
  color: #F7F3EC;
  max-width: 62ch;
  margin-bottom: 12px;
}

.page-about__lead-sub {
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(247, 243, 236, 0.72);
  max-width: 58ch;
  margin: 0 0 32px;
}

.page-about__hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 16px;
}

.page-about__hero-links .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 24px;
  border-radius: 2px;
  font-family: var(--about-sans);
  font-weight: 600;
  font-size: 0.94rem;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.page-about__hero-links .btn--accent {
  background: var(--about-gold);
  color: #08251D;
  border: 1px solid var(--about-gold);
}

.page-about__hero-links .btn--outline {
  background: transparent;
  color: #F7F3EC;
  border: 1px solid rgba(247, 243, 236, 0.4);
}

.page-about__hero-links .btn:hover,
.page-about__hero-links .btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.24);
}

.page-about__hero-links .btn--accent:hover {
  background: var(--about-gold-light);
}

.page-about__hero-links .btn--outline:hover {
  border-color: #F7F3EC;
  background: rgba(247, 243, 236, 0.06);
}

.page-about__hero-panel {
  background: rgba(8, 37, 29, 0.66);
  border: 1px solid rgba(201, 162, 39, 0.35);
  border-left-width: 3px;
  border-left-color: var(--about-gold);
  padding: 28px 32px 24px;
  position: relative;
}

.page-about__hero-panel::before {
  content: '';
  position: absolute;
  top: -8px;
  right: 32px;
  width: 48px;
  height: 16px;
  background: var(--about-gold);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.9;
}

.page-about__panel-index {
  font-family: var(--about-mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  color: var(--about-gold-light);
  margin: 0 0 18px;
}

.page-about__panel-stats {
  margin: 0;
  padding: 0;
}

.page-about__stat-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid rgba(247, 243, 236, 0.15);
  padding: 10px 0;
}

.page-about__stat-row:last-child {
  border-bottom: none;
}

.page-about__stat-row dt {
  font-size: 0.9rem;
  color: rgba(247, 243, 236, 0.75);
}

.page-about__stat-row dd {
  font-family: var(--about-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--about-gold-light);
  margin: 0;
}

.page-about__panel-note {
  font-family: var(--about-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: rgba(247, 243, 236, 0.55);
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(247, 243, 236, 0.2);
}

.page-about__story {
  padding: 96px 0 80px;
  position: relative;
}

.page-about__story::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  width: 1px;
  height: 80px;
  background: var(--about-border);
}

.page-about__story .container {
  max-width: var(--container);
  padding: 0 20px;
  margin: 0 auto;
}

.page-about__story-head {
  margin-bottom: 48px;
}

.section-head .section-kicker {
  font-family: var(--about-mono);
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  color: #B3841B;
  margin-bottom: 10px;
}

.section-head .section-title {
  font-size: clamp(1.6rem, 3.6vw, 2.3rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--about-green);
  max-width: 20em;
  margin: 0;
}

.page-about__story-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}

.page-about__story-paragraph {
  font-size: 1rem;
  line-height: 1.95;
  color: #23352E;
  margin: 0 0 18px;
  max-width: 64ch;
  letter-spacing: 0.01em;
}

.page-about__story-paragraph:last-child {
  margin-bottom: 0;
}

.page-about__story-visual {
  position: relative;
}

.page-about__visual-label {
  font-family: var(--about-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--about-text-secondary);
  margin: 0 0 10px;
  text-align: right;
}

.page-about__story-frame {
  border: 1px solid var(--about-border);
  background: var(--about-green-dark);
  padding: 6px;
}

.media-frame {
  overflow: hidden;
}

.media-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about__story-caption {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--about-text-secondary);
  margin: 10px 0 0;
  text-align: right;
}

.page-about__timeline {
  padding: 88px 0 96px;
  position: relative;
}

.page-about__timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  background: #0B3D2E;
  pointer-events: none;
}

.page-about__timeline .container {
  position: relative;
  background: #0B3D2E;
  padding: 88px 20px 96px;
  color: #F7F3EC;
  max-width: 1200px;
  margin: 0 auto;
}

.page-about__timeline .section-head {
  max-width: 720px;
}

.page-about__timeline .section-kicker {
  color: var(--about-gold-light);
}

.page-about__timeline .section-title {
  color: #F7F3EC;
}

.page-about__timeline-intro {
  font-size: 1rem;
  line-height: 1.9;
  margin: 20px 0 0;
  color: rgba(247, 243, 236, 0.78);
  max-width: 64ch;
}

.page-about__timeline-list {
  position: relative;
  list-style: none;
  margin: 72px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about__timeline-item {
  position: relative;
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.page-about__timeline-node {
  display: none;
}

.page-about__milestone {
  background: rgba(8, 37, 29, 0.6);
  border: 1px solid rgba(201, 162, 39, 0.28);
  position: relative;
  transition: border-color 0.25s ease;
}

.page-about__milestone:hover {
  border-color: rgba(201, 162, 39, 0.7);
}

.page-about__milestone-summary {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 22px;
  cursor: pointer;
  font-family: var(--about-sans);
  list-style: none;
  font-weight: 400;
}

.page-about__milestone-summary::-webkit-details-marker {
  display: none;
}

.page-about__milestone-year {
  font-family: var(--about-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--about-gold-light);
  min-width: 56px;
}

.page-about__milestone-title {
  flex: 1;
  font-size: 1.02rem;
  font-weight: 600;
  color: #F7F3EC;
}

.page-about__milestone-toggle {
  font-family: var(--about-mono);
  font-size: 1.4rem;
  color: var(--about-gold);
  transition: transform 0.25s ease;
  line-height: 1;
}

.page-about__milestone[open] .page-about__milestone-toggle {
  transform: rotate(45deg);
}

.page-about__milestone-body {
  padding: 0 22px 22px;
  color: rgba(247, 243, 236, 0.78);
  max-width: 60ch;
}

.page-about__milestone-body p {
  font-size: 0.95rem;
  line-height: 1.85;
  margin: 0;
}

.page-about__timeline-more {
  margin-top: 40px;
  padding: 20px 24px;
  border-left: 3px solid var(--about-gold);
  background: rgba(8, 37, 29, 0.55);
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(247, 243, 236, 0.78);
}

.page-about__timeline-more a {
  color: var(--about-gold-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about__timeline-more a:hover {
  color: #F7F3EC;
}

.page-about__data {
  padding: 88px 0 80px;
  background: var(--about-paper);
  position: relative;
}

.page-about__data .container {
  max-width: var(--container);
  padding: 0 20px;
  margin: 0 auto;
}

.page-about__data-lead {
  font-size: 1.06rem;
  line-height: 1.9;
  color: #23352E;
  max-width: 68ch;
  margin: 20px 0 48px;
}

.page-about__data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 56px;
}

.page-about__data-card {
  background: #FFFFFF;
  border: 1px solid var(--about-border);
  padding: 32px 28px;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-about__data-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(11, 61, 46, 0.08);
}

.page-about__data-num {
  font-family: var(--about-mono);
  font-size: clamp(2.2rem, 5vw, 3.1rem);
  font-weight: 700;
  color: var(--about-green);
  margin: 0 0 8px;
  line-height: 1;
}

.page-about__data-unit {
  font-size: 0.5em;
  vertical-align: super;
  color: var(--about-gold);
}

.page-about__data-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--about-green);
  margin: 0 0 10px;
}

.page-about__data-desc {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--about-text-secondary);
  margin: 0;
}

.page-about__data-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  background: var(--about-green-dark);
  color: #F7F3EC;
  padding: 36px 28px;
  position: relative;
  border-top: 3px solid var(--about-gold);
  align-items: center;
}

.page-about__panel-kicker {
  color: var(--about-gold-light);
  font-family: var(--about-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  margin: 0 0 10px;
}

.page-about__panel-title {
  font-size: 1.45rem;
  font-weight: 700;
  margin: 0 0 16px;
  color: #F7F3EC;
  max-width: 18em;
}

.page-about__data-panel-text p:not(.section-kicker):not(.page-about__panel-title) {
  font-size: 0.95rem;
  line-height: 1.85;
  color: rgba(247, 243, 236, 0.8);
  margin: 0 0 14px;
  max-width: 60ch;
}

.page-about__data-panel-text p:not(.section-kicker):not(.page-about__panel-title):last-child {
  margin-bottom: 0;
}

.page-about__data-frame {
  border: 1px solid rgba(201, 162, 39, 0.3);
  background: #061F19;
  padding: 4px;
}

.page-about__qualification {
  padding: 80px 0 96px;
  background: linear-gradient(180deg, #F7F3EC 0%, #EFE9DE 100%);
}

.page-about__qualification .container {
  max-width: var(--container);
  padding: 0 20px;
  margin: 0 auto;
}

.page-about__qualification-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 56px;
  margin-top: 48px;
}

.page-about__sub-heading {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--about-green);
  margin: 0 0 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--about-green);
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about__sub-heading::before {
  content: '';
  display: block;
  width: 10px;
  height: 10px;
  background: var(--about-gold);
}

.page-about__cert-list {
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
  display: grid;
  gap: 24px;
}

.page-about__cert-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  align-items: start;
  padding: 24px 22px;
  background: #FFFFFF;
  border: 1px solid var(--about-border);
  position: relative;
  transition: border-color 0.2s ease;
}

.page-about__cert-item:hover {
  border-color: var(--about-gold);
}

.page-about__cert-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border: 2px solid var(--about-gold);
  background: #F7F3EC;
  color: #8A6A12;
  font-family: var(--about-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-align: center;
  transform: rotate(-3deg);
  position: relative;
  border-radius: 2px;
  line-height: 1.15;
}

.page-about__cert-mark::after {
  content: '';
  position: absolute;
  top: 4px;
  left: 4px;
  right: 4px;
  bottom: 4px;
  border: 1px solid rgba(201, 162, 39, 0.4);
  pointer-events: none;
}

.page-about__cert-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--about-green);
  margin: 0 0 6px;
}

.page-about__cert-desc {
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--about-text-secondary);
  margin: 0;
}

.page-about__cert-frame {
  border: 1px solid var(--about-border);
  background: #FFFFFF;
  padding: 8px;
  max-width: 460px;
}

.page-about__team-stats {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1px;
  background: var(--about-border);
  border: 1px solid var(--about-border);
  margin-bottom: 24px;
}

.page-about__team-stat {
  background: #FFFFFF;
  padding: 20px 16px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 98px;
}

.page-about__team-num {
  font-family: var(--about-mono);
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--about-green);
  margin: 0 0 4px;
  line-height: 1.1;
}

.page-about__team-percent,
.page-about__team-plus {
  color: var(--about-gold);
  font-size: 0.85em;
}

.page-about__team-label {
  font-size: 0.76rem;
  color: var(--about-text-secondary);
  margin: 0;
  line-height: 1.4;
}

.page-about__team-desc {
  font-size: 0.95rem;
  line-height: 1.9;
  color: #23352E;
  max-width: 62ch;
  margin: 0 0 28px;
}

.page-about__team-frame {
  border: 1px solid var(--about-border);
  background: #FFFFFF;
  padding: 6px;
  max-width: 700px;
}

.page-about__qualification-note {
  margin-top: 60px;
  padding: 32px;
  background: var(--about-green);
  color: #F7F3EC;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-left: 4px solid var(--about-gold);
}

.page-about__qualification-note p {
  font-size: 0.95rem;
  line-height: 1.85;
  margin: 0;
  max-width: 62ch;
  color: rgba(247, 243, 236, 0.9);
}

.page-about__qualification-note .btn--outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 24px;
  background: transparent;
  color: #F7F3EC;
  border: 1px solid rgba(247, 243, 236, 0.4);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 2px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-about__qualification-note .btn--outline:hover {
  border-color: var(--about-gold-light);
  background: rgba(201, 162, 39, 0.12);
  color: var(--about-gold-light);
}

@media (min-width: 640px) {
  .page-about__hero-inner {
    grid-template-columns: 1.3fr 0.9fr;
    gap: 48px;
    padding: 0 30px;
  }

  .page-about__hero-panel {
    align-self: center;
  }

  .page-about__data-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about__timeline-list {
    gap: 24px;
  }

  .page-about__milestone-summary {
    padding: 22px 28px;
  }

  .page-about__milestone-body {
    padding: 0 28px 24px;
  }

  .page-about__timeline-more {
    padding: 20px 32px;
  }
}

@media (min-width: 860px) {
  .page-about__story-grid {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
  }

  .page-about__timeline .container {
    padding-left: 48px;
    padding-right: 48px;
  }

  .page-about__timeline-list {
    grid-template-columns: repeat(2, 1fr);
    column-gap: 64px;
  }

  .page-about__timeline-item {
    grid-template-columns: 56px 1fr;
    gap: 24px;
  }

  .page-about__timeline-node {
    display: flex;
    justify-content: flex-start;
    padding-top: 22px;
  }

  .page-about__node-year {
    font-family: var(--about-mono);
    font-size: 0.72rem;
    color: var(--about-gold-light);
    background: transparent;
    border-bottom: 1px solid rgba(201, 162, 39, 0.4);
    padding-bottom: 6px;
    letter-spacing: 0.1em;
  }

  .page-about__data-panel {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    padding: 44px 48px;
  }

  .page-about__qualification-grid {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
  }

  .page-about__team-stats {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1080px) {
  .page-about__hero {
    padding: 104px 0 88px;
  }

  .page-about__hero-inner {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 80px;
  }

  .page-about__timeline-list {
    grid-template-columns: 1fr;
    max-width: 880px;
    margin-left: auto;
    margin-right: auto;
    gap: 0;
  }

  .page-about__timeline-item {
    grid-template-columns: 120px 80px 1fr;
    position: relative;
    padding-bottom: 28px;
  }

  .page-about__timeline-item:not(:last-child) {
    border-bottom: 1px dashed rgba(201, 162, 39, 0.2);
  }

  .page-about__timeline-node {
    display: flex;
    align-items: flex-start;
    padding-top: 24px;
  }

  .page-about__node-year {
    font-size: 0.82rem;
    border: 1px solid rgba(201, 162, 39, 0.35);
    padding: 6px 12px;
  }

  .page-about__milestone {
    background: transparent;
    border: 1px solid rgba(201, 162, 39, 0.28);
  }

  .page-about__milestone-summary {
    padding: 20px 24px;
  }

  .page-about__milestone-body {
    padding: 0 24px 24px;
  }

  .page-about__timeline-more {
    max-width: 880px;
    margin-left: auto;
    margin-right: auto;
  }
}

@media (min-width: 1200px) {
  .page-about__hero-inner,
  .page-about__story .container,
  .page-about__data .container,
  .page-about__qualification .container {
    padding-left: 0;
    padding-right: 0;
  }
}

.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about__milestone-toggle {
    transition: none;
  }
}