.page-about {
  --about-card-bg: rgba(44, 44, 44, 0.74);
  --about-border: rgba(224, 224, 224, 0.14);
  --about-text-dim: rgba(224, 224, 224, 0.72);
  --about-glow-neon: rgba(57, 255, 20, 0.22);
  --about-glow-blue: rgba(0, 191, 255, 0.16);
  --about-glow-purple: rgba(106, 13, 173, 0.4);

  background-color: var(--c-navy);
  background-image:
    linear-gradient(rgba(0, 191, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 191, 255, 0.04) 1px, transparent 1px);
  background-size: 36px 36px, 36px 36px;
  color: var(--c-gray);
  font-family: var(--f-body);
  line-height: 1.8;
  overflow-x: hidden;
}

.page-about a {
  color: var(--c-blue);
  text-decoration: none;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease), background-color 0.3s var(--ease), box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about a:hover,
.page-about a:focus-visible {
  color: var(--c-neon);
  outline: none;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  color: var(--c-white);
  font-family: var(--f-display);
  font-weight: 800;
  line-height: 1.18;
  margin: 0 0 16px;
}

.page-about h2 {
  font-size: clamp(28px, 4vw, 42px);
  letter-spacing: -0.02em;
}

.page-about h3 {
  font-size: clamp(18px, 2vw, 22px);
  margin-bottom: 10px;
}

.page-about p {
  margin: 0 0 16px;
}

.page-about img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--about-text-dim);
  margin-bottom: 40px;
}

.page-about .breadcrumb a {
  color: rgba(224, 224, 224, 0.7);
  border-bottom: 1px solid transparent;
}

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

.page-about .breadcrumb .sep {
  opacity: 0.5;
}

.page-about .about-section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-neon);
  border: 1px solid rgba(57, 255, 20, 0.4);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 20px;
  background: rgba(11, 27, 61, 0.5);
}

/* 英雄区 */
.about-hero {
  position: relative;
  padding: 96px 0 72px;
  overflow: hidden;
}

.about-hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -140px;
  width: 480px;
  height: 480px;
  background: linear-gradient(135deg, rgba(106, 13, 173, 0.6), rgba(11, 27, 61, 0.1));
  transform: rotate(14deg) skewX(-8deg);
  border: 1px solid rgba(57, 255, 20, 0.18);
  pointer-events: none;
  z-index: 0;
}

.about-hero::after {
  content: "";
  position: absolute;
  left: -80px;
  bottom: -120px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, var(--about-glow-blue), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

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

.about-hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.about-hero-label {
  margin-bottom: 24px;
}

.about-hero-copy h1 {
  font-size: clamp(34px, 6vw, 58px);
  letter-spacing: -0.03em;
  max-width: 820px;
  margin-bottom: 24px;
}

.about-hero-lead {
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--c-gray);
  max-width: 780px;
  margin-bottom: 28px;
}

.about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--about-text-dim);
  border-top: 1px solid var(--about-border);
  padding-top: 20px;
}

.about-hero-brand-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.about-hero-brand {
  border-radius: 50%;
  border: 2px solid rgba(57, 255, 20, 0.5);
  box-shadow: 0 0 40px var(--about-glow-neon), 0 0 80px rgba(106, 13, 173, 0.35);
  width: 180px;
  height: 180px;
  object-fit: cover;
}

/* 我们是谁 */
.about-who {
  position: relative;
  padding: 72px 0;
}

.about-who::before {
  content: "";
  position: absolute;
  top: 120px;
  left: -180px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, var(--about-glow-purple), transparent 70%);
  pointer-events: none;
}

.about-who-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-bottom: 56px;
}

.about-who-copy {
  max-width: 680px;
}

.about-who-copy p:last-of-type {
  margin-bottom: 24px;
}

.about-more-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--c-blue);
  border-bottom: 1px solid rgba(0, 191, 255, 0.4);
  padding-bottom: 4px;
}

.about-more-link:hover {
  color: var(--c-neon);
  border-bottom-color: var(--c-neon);
}

.about-who-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  align-self: center;
}

.about-stat {
  background: var(--about-card-bg);
  border: 1px solid var(--about-border);
  border-top: 3px solid var(--c-blue);
  border-radius: var(--radius);
  padding: 24px 16px 20px;
  text-align: center;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.about-stat:hover {
  transform: translateY(-4px);
  border-color: rgba(57, 255, 20, 0.4);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.about-stat-purple {
  border-top-color: var(--c-purple);
}

.about-stat-neon {
  border-top-color: var(--c-neon);
}

.about-stat-num {
  display: block;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  font-family: var(--f-display);
  color: var(--c-white);
  line-height: 1.1;
  margin-bottom: 4px;
}

.about-stat-blue .about-stat-num {
  color: var(--c-blue);
}

.about-stat-purple .about-stat-num {
  color: #c77dff;
}

.about-stat-neon .about-stat-num {
  color: var(--c-neon);
}

.about-stat-label {
  display: block;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--about-text-dim);
}

.about-core-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.about-core-item {
  position: relative;
  background: var(--about-card-bg);
  border: 1px solid var(--about-border);
  border-left: 3px solid var(--c-purple);
  border-radius: var(--radius);
  padding: 24px 24px 20px 32px;
  transition: border-color 0.3s var(--ease), background-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.about-core-item:hover {
  border-left-color: var(--c-neon);
  transform: translateX(6px);
  background: rgba(44, 44, 44, 0.9);
}

.about-core-num {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 12px;
  font-weight: 700;
  color: rgba(224, 224, 224, 0.4);
  letter-spacing: 0.1em;
}

.about-core-item h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.about-core-item p {
  font-size: 14px;
  margin-bottom: 0;
  color: var(--about-text-dim);
}

/* 发展历程 */
.about-timeline {
  position: relative;
  padding: 72px 0 96px;
}

.about-section-head {
  max-width: 720px;
  margin-bottom: 56px;
}

.about-section-head p:last-child {
  font-size: 15px;
  color: var(--about-text-dim);
  margin-bottom: 0;
}

.about-section-head-left {
  margin-left: 0;
}

.about-timeline-wrap {
  position: relative;
}

.about-timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.about-timeline-wrap::before {
  content: "";
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--c-neon) 0%, var(--c-blue) 50%, var(--c-purple) 100%);
  opacity: 0.55;
}

.about-timeline-item {
  position: relative;
  margin-bottom: 40px;
  padding-left: 72px;
}

.about-timeline-marker {
  position: absolute;
  left: 0;
  top: 16px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--c-navy);
  border: 2px solid var(--c-neon);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-neon);
  font-size: 13px;
  font-weight: 700;
  font-family: var(--f-display);
  letter-spacing: 0.02em;
  box-shadow: 0 0 20px var(--about-glow-neon);
  z-index: 1;
  transition: background-color 0.3s var(--ease), color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.about-timeline-card {
  background: var(--about-card-bg);
  border: 1px solid var(--about-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.about-timeline-item:hover .about-timeline-card,
.about-timeline-item:focus-within .about-timeline-card {
  border-color: rgba(57, 255, 20, 0.5);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(11, 27, 61, 0.6);
}

.about-timeline-item:hover .about-timeline-marker,
.about-timeline-item:focus-within .about-timeline-marker {
  background: var(--c-neon);
  color: var(--c-navy);
  box-shadow: 0 0 30px var(--about-glow-neon);
}

.about-timeline-card p {
  font-size: 14px;
  color: var(--about-text-dim);
  margin-bottom: 0;
}

.about-timeline-figure {
  margin: 20px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-border);
  padding-top: 16px;
}

.about-timeline-figure img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--about-border);
}

.about-timeline-figure figcaption {
  font-size: 12px;
  color: var(--about-text-dim);
  margin-top: 10px;
  letter-spacing: 0.04em;
}

/* 服务能力 */
.about-capability {
  position: relative;
  padding: 40px 0 96px;
}

.about-capability::before {
  content: "";
  position: absolute;
  top: 40px;
  right: -140px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, var(--about-glow-blue), transparent 70%);
  pointer-events: none;
}

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

.about-capability-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 40px;
}

.about-capability-card {
  background: var(--about-card-bg);
  border: 1px solid var(--about-border);
  border-radius: var(--radius);
  padding: 28px 24px 24px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.about-capability-card::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: rgba(57, 255, 20, 0.05);
  transition: background-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.about-capability-card:hover {
  border-color: rgba(0, 191, 255, 0.5);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(11, 27, 61, 0.65);
}

.about-capability-card:hover::after {
  background: rgba(57, 255, 20, 0.12);
  transform: scale(1.4);
}

.about-capability-icon {
  display: inline-block;
  color: var(--c-neon);
  font-size: 18px;
  margin-bottom: 12px;
}

.about-capability-num {
  display: block;
  font-family: var(--f-display);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 800;
  color: var(--c-white);
  line-height: 1.1;
  margin-bottom: 8px;
}

.about-capability-card:nth-child(2) .about-capability-num,
.about-capability-card:nth-child(5) .about-capability-num {
  color: var(--c-blue);
}

.about-capability-card:nth-child(3) .about-capability-num,
.about-capability-card:nth-child(6) .about-capability-num {
  color: var(--c-neon);
}

.about-capability-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.about-capability-card p {
  font-size: 14px;
  color: var(--about-text-dim);
  margin-bottom: 0;
}

.about-capability-figure {
  margin: 0;
  padding: 0;
}

.about-capability-figure img {
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--about-border);
  box-shadow: 0 20px 60px rgba(11, 27, 61, 0.6);
}

.about-capability-figure figcaption {
  font-size: 13px;
  color: var(--about-text-dim);
  margin-top: 12px;
  letter-spacing: 0.04em;
}

/* 资质与认证 */
.about-credential {
  padding: 40px 0 96px;
}

.about-credential-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.about-credential-item {
  background: linear-gradient(135deg, rgba(106, 13, 173, 0.24), rgba(11, 27, 61, 0.72));
  border: 1px solid rgba(106, 13, 173, 0.5);
  border-radius: var(--radius);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.about-credential-item:hover {
  border-color: rgba(57, 255, 20, 0.5);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(11, 27, 61, 0.6);
}

.about-credential-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--c-purple);
  color: var(--c-white);
  font-size: 16px;
  font-weight: 800;
  font-family: var(--f-display);
  letter-spacing: 0.04em;
  margin-bottom: 20px;
  box-shadow: 0 0 24px var(--about-glow-purple);
}

.about-credential-icp .about-credential-badge {
  background: var(--c-blue);
  box-shadow: 0 0 24px var(--about-glow-blue);
}

.about-credential-item p {
  font-size: 14px;
  color: var(--about-text-dim);
  margin-bottom: 0;
}

/* 相关链接 */
.about-links {
  padding: 40px 0 96px;
}

.about-links-title {
  margin-bottom: 40px;
}

.about-links-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.about-link-card {
  display: block;
  position: relative;
  background: var(--about-card-bg);
  border: 1px solid var(--about-border);
  border-radius: var(--radius);
  padding: 28px 24px 24px;
  color: var(--c-gray);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), background-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.about-link-card:hover {
  border-color: rgba(57, 255, 20, 0.5);
  transform: translateY(-4px);
  background: rgba(44, 44, 44, 0.92);
  box-shadow: 0 16px 40px rgba(11, 27, 61, 0.6);
}

.about-link-card h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.about-link-card p {
  font-size: 14px;
  color: var(--about-text-dim);
  margin-bottom: 0;
  padding-right: 40px;
}

.about-link-index {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  font-family: var(--f-display);
  color: var(--c-neon);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.about-link-arrow {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  color: var(--c-blue);
  transition: color 0.3s var(--ease), transform 0.3s var(--ease);
}

.about-link-card:hover .about-link-arrow {
  color: var(--c-neon);
  transform: translate(4px, -50%);
}

/* 平板增强 */
@media (min-width: 640px) {
  .about-core-list {
    grid-template-columns: 1fr 1fr;
  }

  .about-who-stats {
    gap: 20px;
  }

  .about-capability-grid {
    grid-template-columns: 1fr 1fr;
  }

  .about-credential-grid {
    grid-template-columns: 1fr 1fr;
  }

  .about-credential-icp {
    grid-column: 1 / -1;
  }

  .about-links-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* 桌面增强 */
@media (min-width: 1024px) {
  .page-about {
    background-size: 56px 56px, 56px 56px, 100% 100%;
  }

  .about-hero {
    padding: 120px 0 96px;
  }

  .about-hero-layout {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
  }

  .about-hero-brand {
    width: 220px;
    height: 220px;
  }

  .about-who {
    padding: 96px 0;
  }

  .about-who-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    margin-bottom: 72px;
  }

  .about-who-stats {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .about-stat {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    text-align: left;
    padding: 24px 24px 20px;
  }

  .about-stat-num {
    font-size: 36px;
  }

  .about-stat-label {
    font-size: 14px;
  }

  .about-core-list {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .about-timeline {
    padding: 96px 0 120px;
  }

  .about-timeline-wrap {
    padding-left: 0;
  }

  .about-timeline-wrap::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .about-timeline-item {
    width: 50%;
    padding-left: 0;
    margin-bottom: 56px;
  }

  .about-timeline-item:nth-child(odd) {
    padding-right: 72px;
    margin-right: 50%;
    text-align: right;
  }

  .about-timeline-item:nth-child(even) {
    padding-left: 72px;
    margin-left: 50%;
  }

  .about-timeline-marker {
    top: 20px;
  }

  .about-timeline-item:nth-child(odd) .about-timeline-marker {
    left: auto;
    right: -24px;
  }

  .about-timeline-item:nth-child(even) .about-timeline-marker {
    left: -24px;
  }

  .about-timeline-figure img {
    max-width: 320px;
  }

  .about-timeline-item:nth-child(odd) .about-timeline-figure img {
    margin-left: auto;
  }

  .about-capability {
    padding: 40px 0 120px;
  }

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

  .about-capability-figure {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    margin-top: 16px;
  }

  .about-capability-figure img {
    max-width: 100%;
  }

  .about-capability-figure figcaption {
    margin-top: 0;
    font-size: 15px;
    line-height: 2;
  }

  .about-credential {
    padding: 40px 0 120px;
  }

  .about-credential-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .about-credential-icp {
    grid-column: auto;
    grid-row: 1 / 3;
  }

  .about-links {
    padding: 40px 0 120px;
  }

  .about-links-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about,
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}