.page-about {
  --about-gold-soft: rgba(212, 175, 55, 0.15);
  --about-gold-line: 1px solid rgba(212, 175, 55, 0.4);
  --about-card-bg: rgba(255, 249, 230, 0.05);
  --about-red-line: 1px solid rgba(139, 0, 0, 0.3);
  --about-section-pad: clamp(48px, 7vw, 88px);
  background: var(--color-dark-bg);
  color: var(--color-warm-white);
  line-height: 1.7;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  margin: 0;
}

.page-about p {
  margin: 0;
}

.page-about .breadcrumb {
  padding-top: var(--space-6);
  padding-bottom: var(--space-2);
  color: var(--color-gray);
  font-size: 14px;
}

.page-about .breadcrumb a {
  color: var(--color-gold);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--color-gold-light);
}

.page-about .section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  border: 1px solid rgba(212, 175, 55, 0.5);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.page-about .section-head {
  max-width: 720px;
  margin-bottom: var(--space-6);
}

.page-about .section-head h2 {
  font-size: clamp(26px, 3.4vw, 40px);
  color: var(--color-deep-red);
  margin-top: var(--space-3);
}

.page-about .section-head-note {
  margin-top: var(--space-3);
  font-size: 15px;
  color: #5a5a5a;
}

.page-about .section-head-invert h2 {
  color: var(--color-gold-light);
}

.page-about .section-head-invert .section-head-note {
  color: rgba(255, 249, 230, 0.7);
}

/* === 首屏封面 === */
.page-about .about-hero {
  position: relative;
  padding: clamp(48px, 7vw, 88px) 0 clamp(40px, 6vw, 72px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: linear-gradient(180deg, var(--color-gold), var(--color-deep-red));
  border-radius: 0 4px 4px 0;
}

.page-about .about-hero-inner {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}

.page-about .about-hero h1 {
  font-size: clamp(30px, 5vw, 54px);
  color: var(--color-warm-white);
  margin-top: var(--space-4);
  max-width: 13em;
}

.page-about .about-hero-lead {
  max-width: 42em;
  margin-top: var(--space-4);
  font-size: 16px;
  color: rgba(255, 249, 230, 0.82);
}

.page-about .hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.page-about .hero-stat {
  border: var(--about-gold-line);
  border-top: 3px solid var(--color-gold);
  background: var(--about-card-bg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.page-about .hero-stat:hover {
  transform: translateY(-3px);
  background: rgba(212, 175, 55, 0.09);
}

.page-about .hero-stat-num {
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 38px);
  color: var(--color-gold-light);
  line-height: 1.1;
}

.page-about .hero-stat-label {
  font-size: 13px;
  color: rgba(255, 249, 230, 0.75);
  letter-spacing: 0.06em;
}

.page-about .about-hero-emblem {
  display: none;
  justify-content: center;
  align-items: center;
  position: relative;
  min-height: 340px;
}

.page-about .emblem-coin {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 4px solid var(--color-gold);
  display: grid;
  place-items: center;
  background: radial-gradient(circle at 38% 32%, rgba(240, 215, 140, 0.25), transparent 60%);
  position: relative;
  z-index: 1;
}

.page-about .emblem-coin-hole {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 36px;
  color: var(--color-gold);
  border: 3px solid var(--color-gold);
  border-radius: var(--radius-sm);
  transform: rotate(4deg);
}

.page-about .emblem-ring {
  position: absolute;
  width: 250px;
  height: 250px;
  border-radius: 50%;
  border: 1px dashed rgba(212, 175, 55, 0.35);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.page-about .emblem-seal {
  position: absolute;
  bottom: 8px;
  right: 12px;
  z-index: 2;
  background: var(--color-deep-red);
  color: var(--color-gold-light);
  font-family: var(--font-display);
  font-size: 22px;
  padding: 6px 16px;
  border-radius: var(--radius-sm);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.35);
  transform: rotate(-4deg);
}

/* === 发展历程 === */
.page-about .about-journey {
  background: var(--color-warm-white);
  color: var(--color-dark-bg);
  padding: var(--about-section-pad) 0;
  position: relative;
}

.page-about .about-journey::before {
  content: "";
  position: absolute;
  inset: 16px;
  border: 1px solid rgba(212, 175, 55, 0.45);
  pointer-events: none;
}

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

.page-about .journey-media {
  max-width: 1200px;
  margin: 0 0 var(--space-8);
  border: var(--border-print);
  background: var(--color-cream);
  overflow: hidden;
}

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

.page-about .timeline {
  position: relative;
  padding-left: 34px;
  max-width: 760px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    var(--color-gold) 0 8px,
    rgba(212, 175, 55, 0.25) 8px 14px
  );
}

.page-about .tl-item {
  position: relative;
  margin-bottom: var(--space-6);
}

.page-about .tl-marker {
  position: absolute;
  left: -34px;
  top: 6px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-warm-white);
  border: 4px solid var(--color-gold);
  box-shadow: 0 0 0 3px var(--color-warm-white), 0 0 0 5px rgba(212, 175, 55, 0.4);
}

.page-about .tl-marker::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--color-deep-red);
}

.page-about .tl-panel {
  background: var(--color-cream);
  border: 1px solid rgba(139, 0, 0, 0.14);
  border-left: 4px solid var(--color-gold);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  box-shadow: var(--shadow-paper);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.page-about .tl-panel:hover {
  box-shadow: 8px 8px 0 rgba(212, 175, 55, 0.3);
  transform: translateY(-2px);
}

.page-about .tl-head {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.page-about .tl-year {
  font-family: var(--font-display);
  font-size: 32px;
  color: var(--color-deep-red);
  line-height: 1;
}

.page-about .tl-head h3 {
  font-size: 20px;
  color: var(--color-dark-bg);
}

.page-about .tl-desc {
  margin-top: var(--space-3);
  font-size: 15px;
  color: #4a3f28;
}

.page-about .tl-expand {
  margin-top: var(--space-4);
  border: var(--about-red-line);
  border-radius: var(--radius-sm);
  background: rgba(139, 0, 0, 0.04);
}

.page-about .tl-expand summary {
  cursor: pointer;
  list-style: none;
  padding: var(--space-3) var(--space-4);
  font-weight: 600;
  font-size: 14px;
  color: var(--color-deep-red);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.page-about .tl-expand summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-expand summary::after {
  content: "＋";
  font-size: 18px;
  transition: transform var(--transition-fast);
}

.page-about .tl-expand[open] summary::after {
  content: "−";
}

.page-about .tl-expand p {
  padding: 0 var(--space-4) var(--space-4);
  font-size: 14px;
  color: #5a4a30;
}

/* === 数据实力 === */
.page-about .about-stats {
  background:
    radial-gradient(circle at 12% 18%, rgba(139, 0, 0, 0.28), transparent 42%),
    linear-gradient(150deg, #1A0F0F 0%, #251515 100%);
  padding: var(--about-section-pad) 0;
}

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

.page-about .stat-card {
  border: var(--about-gold-line);
  border-top: 3px solid var(--color-gold);
  background: var(--about-card-bg);
  padding: var(--space-5) var(--space-3);
  text-align: center;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.page-about .stat-card:hover {
  background: rgba(212, 175, 55, 0.09);
  transform: translateY(-3px);
}

.page-about .stat-card-num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  color: var(--color-gold-light);
  line-height: 1.15;
}

.page-about .stat-card-label {
  display: block;
  margin-top: var(--space-2);
  font-size: 14px;
  color: rgba(255, 249, 230, 0.88);
}

.page-about .stat-card-note {
  display: block;
  margin-top: var(--space-2);
  font-size: 12px;
  color: rgba(255, 249, 230, 0.55);
}

.page-about .growth-wrap {
  margin-top: var(--space-8);
  background: rgba(255, 249, 230, 0.04);
  border: var(--about-gold-line);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-4);
}

.page-about .growth-head {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.page-about .growth-head p {
  font-size: 14px;
  color: rgba(255, 249, 230, 0.7);
  max-width: 44em;
}

.page-about .growth-chart {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: end;
  gap: var(--space-2);
  height: 240px;
  padding: 0 var(--space-2);
}

.page-about .gc-col {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  gap: var(--space-2);
  height: 100%;
  min-width: 0;
}

.page-about .gc-tag {
  font-size: 12px;
  color: rgba(255, 249, 230, 0.75);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.page-about .gc-bar {
  width: min(48px, 70%);
  min-height: 8px;
  background: linear-gradient(180deg, var(--color-gold-light), var(--color-gold));
  border-radius: 4px 4px 0 0;
  border: 1px solid rgba(139, 0, 0, 0.25);
  transition: filter var(--transition-fast);
}

.page-about .gc-col:hover .gc-bar {
  filter: brightness(1.15);
}

.page-about .gc-col-current .gc-bar {
  background: linear-gradient(180deg, #f4df9c 0%, var(--color-deep-red) 130%);
  border-color: var(--color-gold);
}

.page-about .gc-col-current .gc-tag {
  color: var(--color-gold-light);
  font-weight: 700;
}

.page-about .gc-year {
  font-family: var(--font-display);
  font-size: 16px;
  color: rgba(255, 249, 230, 0.85);
}

.page-about .growth-note {
  margin-top: var(--space-3);
  font-size: 12px;
  color: rgba(255, 249, 230, 0.45);
  text-align: right;
}

.page-about .stats-extras {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.page-about .extra-chip {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  border: 1px solid rgba(212, 175, 55, 0.35);
  border-radius: 999px;
  background: rgba(255, 249, 230, 0.04);
  font-size: 13px;
  color: rgba(255, 249, 230, 0.85);
}

/* === 技术与安全 === */
.page-about .about-tech {
  background: var(--color-cream);
  color: var(--color-dark-bg);
  padding: var(--about-section-pad) 0;
}

.page-about .about-tech .section-head h2 {
  color: var(--color-deep-red);
}

.page-about .about-tech .section-head-note {
  color: #5a5a5a;
}

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

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

.page-about .tech-point {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: var(--space-4);
  align-items: start;
}

.page-about .tech-point-num {
  font-family: var(--font-display);
  font-size: 30px;
  color: var(--color-gold);
  -webkit-text-stroke: 0.5px rgba(139, 0, 0, 0.3);
  line-height: 1;
  text-align: center;
}

.page-about .tech-point-body h3 {
  font-size: 20px;
  color: var(--color-dark-bg);
  margin-bottom: var(--space-2);
}

.page-about .tech-point-body p {
  font-size: 15px;
  color: #4d4636;
}

.page-about .tech-visual {
  min-width: 0;
}

.page-about .tech-figure {
  margin: 0;
  border: var(--border-print);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-warm-white);
  box-shadow: var(--shadow-paper);
}

.page-about .tech-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .tech-figure figcaption {
  padding: var(--space-3) var(--space-4);
  font-size: 13px;
  color: #6b5a36;
  border-top: 1px solid rgba(212, 175, 55, 0.3);
}

/* === 基础架构 === */
.page-about .about-infra {
  background: var(--color-ink);
  padding: var(--about-section-pad) 0;
}

.page-about .infra-grid {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}

.page-about .infra-copy h2 {
  font-size: clamp(24px, 3vw, 36px);
  color: var(--color-warm-white);
  margin-top: var(--space-3);
}

.page-about .infra-copy > p {
  margin-top: var(--space-4);
  color: rgba(255, 249, 230, 0.8);
  font-size: 15px;
  max-width: 46em;
}

.page-about .infra-list {
  list-style: none;
  margin: var(--space-5) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-about .infra-list li {
  position: relative;
  padding-left: 28px;
  color: rgba(255, 249, 230, 0.82);
  font-size: 14px;
}

.page-about .infra-list li::before {
  content: "◆";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-gold);
  font-size: 12px;
}

.page-about .infra-figure {
  margin: 0;
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .infra-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* === 荣誉与合作 === */
.page-about .about-honor {
  background: var(--color-warm-white);
  color: var(--color-dark-bg);
  padding: var(--about-section-pad) 0;
}

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

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

.page-about .award-card {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: var(--space-4);
  align-items: center;
  background: var(--color-cream);
  border: var(--about-gold-line);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  box-shadow: 4px 4px 0 rgba(139, 0, 0, 0.08);
}

.page-about .award-badge {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 24px;
  color: var(--color-deep-red);
  background: radial-gradient(circle at 35% 28%, var(--color-gold-light), var(--color-gold) 70%);
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--color-gold), 0 2px 6px rgba(0, 0, 0, 0.25);
}

.page-about .award-badge-red {
  background: radial-gradient(circle at 35% 28%, #f5e6c8, var(--color-deep-red) 75%);
  color: var(--color-gold-light);
}

.page-about .award-body h3 {
  font-size: 18px;
  color: var(--color-deep-red);
  margin-bottom: var(--space-1);
}

.page-about .award-body p {
  font-size: 14px;
  color: #4f4633;
}

.page-about .partner-panel {
  background: var(--color-dark-bg);
  color: var(--color-warm-white);
  border: var(--border-print);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
}

.page-about .partner-panel::before {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 2px dashed rgba(212, 175, 55, 0.3);
}

.page-about .partner-panel h3 {
  font-size: 24px;
  color: var(--color-gold-light);
  margin-bottom: var(--space-3);
}

.page-about .partner-panel > p {
  font-size: 14px;
  color: rgba(255, 249, 230, 0.78);
}

.page-about .partner-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.page-about .partner-num {
  font-family: var(--font-display);
  font-size: 34px;
  color: var(--color-gold-light);
  line-height: 1.1;
}

.page-about .partner-label {
  font-size: 13px;
  color: rgba(255, 249, 230, 0.65);
}

.page-about .about-contact-note {
  margin-top: var(--space-8);
  padding: var(--space-4) var(--space-5);
  background: rgba(139, 0, 0, 0.06);
  border-left: 4px solid var(--color-deep-red);
  border-radius: var(--radius-sm);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.page-about .about-contact-note p {
  font-size: 14px;
  color: #4f4633;
  max-width: 42em;
}

.page-about .about-contact-note a {
  color: var(--color-deep-red);
  font-weight: 600;
  font-size: 14px;
  text-underline-offset: 4px;
}

/* === 底部链接 === */
.page-about .about-links {
  background: var(--color-dark-bg);
  padding: clamp(40px, 6vw, 72px) 0;
}

.page-about .about-links-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-5);
}

.page-about .about-links-lead {
  font-size: clamp(20px, 2.6vw, 28px);
  color: var(--color-warm-white);
  max-width: 18em;
}

.page-about .about-links-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* === 响应式增强 === */
@media (min-width: 560px) {
  .page-about .hero-stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-hero-emblem {
    display: flex;
  }

  .page-about .tech-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .tech-visual {
    position: sticky;
    top: calc(var(--header-h) + var(--space-5));
  }

  .page-about .infra-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }

  .page-about .honor-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: stretch;
  }

  .page-about .timeline {
    margin-left: var(--space-6);
  }
}

@media (min-width: 1200px) {
  .page-about .journey-media img {
    max-height: 460px;
  }

  .page-about .gc-bar {
    width: 56px;
  }
}