.page-about {
  --about-purple: #7B2FBE;
  --about-purple-soft: rgba(123, 47, 190, 0.22);
  --about-card-bg: rgba(26, 31, 54, 0.76);
  --about-grid-line: rgba(192, 192, 192, 0.08);
  --content-width: 1240px;
  --header-h: 72px;
  --radius-pill: 999px;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --font-sans: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --c-bg: #0B1026;
  --c-card: #1A1F36;
  --c-neon: #00FF88;
  --c-silver: #C0C0C0;
  --c-text: #E6EAF2;
  --c-cyan: #00E5FF;
  --c-purple: #7B2FBE;
  --c-red: #FF3B30;
  --c-grid: rgba(192, 192, 192, 0.07);
  --c-border: rgba(192, 192, 192, 0.16);
  --c-border-neon: rgba(0, 255, 136, 0.35);
  display: block;
  width: 100%;
  background-color: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-sans);
  line-height: 1.7;
  overflow-x: clip;
}

.page-about .container {
  width: min(100% - 40px, var(--content-width));
  margin-inline: auto;
}

.page-about .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: calc(var(--header-h) + 24px);
  padding-bottom: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--c-silver);
}

.page-about .crumbs a {
  color: var(--c-cyan);
  text-decoration: none;
  transition: color 0.3s var(--ease);
}

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

.page-about .crumbs span[aria-current="page"] {
  color: var(--c-text);
}

.page-about .section-number {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-neon);
}

.page-about .section-title {
  margin: 0 0 24px;
  font-size: clamp(28px, 4.6vw, 48px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.page-about .section-lede {
  max-width: 640px;
  margin: 0 0 36px;
  font-size: clamp(16px, 2vw, 18px);
  color: var(--c-silver);
}

.page-about .data-panel {
  background: var(--about-card-bg);
  border: 1px solid var(--c-border);
  border-radius: 20px;
  padding: 28px 24px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35), inset 0 0 0 1px rgba(255, 255, 255, 0.02);
}

.page-about .fig-frame {
  position: relative;
  margin: 0;
  border-radius: 16px;
  overflow: hidden;
  background: var(--c-card);
  border: 1px solid var(--c-border);
}

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

.page-about .fig-caption {
  margin: 10px 4px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-silver);
  letter-spacing: 0.02em;
}

.page-about [data-reveal] {
  opacity: 1;
  transform: none;
}

/* 首屏 hero */
.page-about .about-hero {
  position: relative;
  padding: 48px 0 72px;
  background:
    radial-gradient(ellipse at 78% 20%, var(--about-purple-soft), transparent 54%),
    linear-gradient(180deg, rgba(11, 16, 38, 0.8) 0%, var(--c-bg) 100%);
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

.page-about .hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--c-cyan);
}

.page-about .hero-eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--c-neon);
}

.page-about .hero-title {
  margin: 0 0 24px;
  font-size: clamp(32px, 6vw, 60px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-about .hero-lead {
  max-width: 560px;
  margin: 0 0 16px;
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.8;
  color: var(--c-silver);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.page-about .hero-visual {
  position: relative;
}

.page-about .hero-panel {
  position: relative;
  z-index: 2;
}

.page-about .data-status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--c-border);
}

.page-about .status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-neon);
  box-shadow: 0 0 12px var(--c-neon);
}

.page-about .status-text {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-cyan);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 16px;
  margin: 0;
}

.page-about .hero-stats .data-stat {
  padding: 14px;
  border-left: 2px solid var(--c-border-neon);
  background: rgba(11, 16, 38, 0.4);
  border-radius: 0 10px 10px 0;
}

.page-about .stat-label {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-silver);
}

.page-about .stat-value {
  display: block;
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-neon);
}

.page-about .stat-note {
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--c-silver);
}

.page-about .panel-note {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-silver);
  letter-spacing: 0.02em;
}

.page-about .hero-bg-img {
  position: absolute;
  inset: auto 0 0 auto;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.12;
  border-radius: 20px;
}

/* 品牌愿景 */
.page-about .about-vision {
  padding: 72px 0;
  background: var(--about-purple);
  background: linear-gradient(135deg, rgba(123, 47, 190, 0.85) 0%, rgba(59, 22, 118, 0.95) 50%, rgba(11, 16, 38, 1) 100%);
}

.page-about .vision-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .vision-number {
  font-family: var(--font-mono);
  font-size: clamp(72px, 12vw, 140px);
  font-weight: 700;
  line-height: 1;
  color: rgba(255, 255, 255, 0.12);
  letter-spacing: -0.04em;
}

.page-about .vision-content {
  padding-top: 0;
}

.page-about .vision-content .section-title {
  color: #fff;
}

.page-about .vision-copy {
  display: grid;
  gap: 16px;
  max-width: 640px;
  margin-bottom: 32px;
}

.page-about .vision-copy p {
  margin: 0;
  color: rgba(230, 234, 242, 0.92);
}

.page-about .vision-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .vision-points li {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 14px;
  padding: 18px 20px;
  background: rgba(11, 16, 38, 0.34);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
}

.page-about .point-mark {
  display: block;
  width: 10px;
  height: 10px;
  margin-top: 8px;
  border: 2px solid var(--c-cyan);
  border-radius: 2px;
  transform: rotate(45deg);
}

.page-about .vision-points h3 {
  margin: 0 0 6px;
  font-size: 17px;
  color: #fff;
}

.page-about .vision-points p {
  margin: 0;
  font-size: 14px;
  color: rgba(230, 234, 242, 0.8);
}

/* 时间线 */
.page-about .about-timeline {
  position: relative;
  padding: 80px 0 88px;
  background:
    linear-gradient(var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
}

.page-about .timeline-heading {
  max-width: 680px;
  margin-bottom: 48px;
}

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

.page-about .milestone-list::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-neon) 0%, var(--c-cyan) 45%, var(--about-purple) 100%);
  opacity: 0.55;
  border-radius: 2px;
}

.page-about .milestone-item {
  position: relative;
  padding: 0 0 38px 44px;
}

.page-about .milestone-line {
  position: absolute;
  left: 0;
  top: 6px;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about .milestone-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-neon);
  border: 3px solid var(--c-bg);
  box-shadow: 0 0 0 2px var(--c-neon), 0 0 16px rgba(0, 255, 136, 0.45);
}

.page-about .milestone-card {
  padding: 24px 22px;
  background: var(--about-card-bg);
  border: 1px solid var(--c-border);
  border-radius: 16px;
  transition: border-color 0.35s var(--ease), transform 0.35s var(--ease);
}

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

.page-about .milestone-phase {
  display: inline-block;
  margin: 0 0 10px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--about-purple-soft);
  border: 1px solid rgba(123, 47, 190, 0.4);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
}

.page-about .milestone-card h3 {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--c-text);
}

.page-about .milestone-card p:last-child {
  margin: 0;
  color: var(--c-silver);
  font-size: 14px;
}

.page-about .timeline-visual {
  margin-top: 48px;
}

.page-about .timeline-visual .fig-caption {
  text-align: center;
}

/* 技术与团队 */
.page-about .about-tech {
  padding: 80px 0;
  background: linear-gradient(115deg, #0B1026 0%, rgba(26, 31, 54, 0.96) 55%, rgba(123, 47, 190, 0.3) 100%);
}

.page-about .tech-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about .tech-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .tech-list li {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 14px;
  padding: 20px 18px;
  background: rgba(11, 16, 38, 0.48);
  border: 1px solid var(--c-border);
  border-radius: 14px;
  transition: border-color 0.3s var(--ease);
}

.page-about .tech-list li:hover {
  border-color: var(--c-border-neon);
}

.page-about .tech-index {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--c-neon);
  letter-spacing: 0.04em;
}

.page-about .tech-list h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.page-about .tech-list p {
  margin: 0;
  font-size: 14px;
  color: var(--c-silver);
}

.page-about .tech-figure {
  align-self: start;
}

/* 资质与合作 */
.page-about .about-credential {
  padding: 80px 0;
  background: var(--c-card);
  background: linear-gradient(180deg, #1A1F36 0%, #10152A 100%);
}

.page-about .credential-heading {
  max-width: 680px;
  margin-bottom: 44px;
}

.page-about .credential-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-bottom: 36px;
}

.page-about .credential-card {
  padding: 28px 24px;
  background: rgba(11, 16, 38, 0.55);
  border: 1px solid var(--c-border);
  border-radius: 16px;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .credential-card:hover {
  border-color: var(--c-border-neon);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
  transform: translateY(-3px);
}

.page-about .credential-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin-bottom: 18px;
  border-radius: 14px;
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid rgba(0, 255, 136, 0.2);
}

.page-about .credential-card h3 {
  margin: 0 0 12px;
  font-size: 19px;
  font-weight: 700;
}

.page-about .credential-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-silver);
}

.page-about .credential-note {
  max-width: 720px;
  margin: 0 auto;
  padding: 22px 24px;
  border-left: 3px solid var(--c-neon);
  background: rgba(0, 255, 136, 0.05);
  border-radius: 0 12px 12px 0;
}

.page-about .credential-note p {
  margin: 0;
  font-size: 15px;
  color: var(--c-text);
}

/* 数据信任 */
.page-about .about-stats {
  padding: 80px 0;
  background:
    radial-gradient(ellipse at 80% 70%, rgba(123, 47, 190, 0.22), transparent 60%),
    var(--c-bg);
}

.page-about .stats-panel {
  padding: 36px 26px;
  background: var(--about-card-bg);
  border: 1px solid var(--c-border);
  border-radius: 24px;
}

.page-about .stats-heading {
  margin-bottom: 36px;
}

.page-about .stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin: 0 0 32px;
}

.page-about .stats-grid .data-stat {
  padding: 20px;
  border-radius: 14px;
  text-align: center;
  background: rgba(11, 16, 38, 0.46);
  border: 1px solid var(--c-border);
}

.page-about .stats-grid .stat-label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-silver);
}

.page-about .stats-grid .stat-value {
  font-size: clamp(30px, 4.4vw, 42px);
}

.page-about .stats-trust {
  margin: 0;
  padding-top: 22px;
  border-top: 1px solid var(--c-border);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--c-cyan);
}

/* CTA */
.page-about .about-contact-cta {
  padding: 80px 0;
  background: var(--about-purple);
  background: linear-gradient(90deg, #4b1a78 0%, #7B2FBE 55%, #2c1154 100%);
  text-align: center;
}

.page-about .cta-inner {
  max-width: 680px;
}

.page-about .cta-inner .section-title {
  color: #fff;
}

.page-about .cta-inner p {
  color: rgba(230, 234, 242, 0.86);
  font-size: 15px;
}

.page-about .contact-line {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--c-neon) !important;
  letter-spacing: 0.04em;
}

.page-about .cta-inner .btn-ghost {
  margin-top: 12px;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}

.page-about .cta-inner .btn-ghost:hover {
  border-color: var(--c-neon);
  color: var(--c-neon);
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 26px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s var(--ease);
  border: 1px solid transparent;
}

.page-about .btn-primary {
  background: var(--c-neon);
  color: #0B1026;
}

.page-about .btn-primary:hover {
  background: #33ffa0;
  box-shadow: 0 0 24px rgba(0, 255, 136, 0.3);
}

.page-about .btn-ghost {
  background: transparent;
  border-color: var(--c-border);
  color: var(--c-text);
}

.page-about .btn-ghost:hover {
  border-color: var(--c-neon);
  color: var(--c-neon);
}

/* ==== 桌面端 ==== */
@media (min-width: 768px) {
  .page-about .hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
  }

  .page-about .hero-actions {
    flex-wrap: nowrap;
  }

  .page-about .vision-grid {
    grid-template-columns: 0.32fr 1fr;
    gap: 32px;
  }

  .page-about .vision-number {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    text-align: center;
    justify-self: start;
    height: 100%;
    min-height: 220px;
  }

  .page-about .about-timeline {
    padding: 96px 0 100px;
  }

  .page-about .milestone-list::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .milestone-item {
    padding: 0 0 44px;
    width: 50%;
    top: 0;
  }

  .page-about .milestone-card {
    margin: 0;
  }

  .page-about .milestone-item:nth-child(odd) {
    left: 0;
    padding-right: 60px;
    text-align: right;
  }

  .page-about .milestone-item:nth-child(odd) .milestone-line {
    right: -16px;
    left: auto;
    width: 30px;
  }

  .page-about .milestone-item:nth-child(even) {
    left: 50%;
    padding-left: 60px;
  }

  .page-about .milestone-item:nth-child(even) .milestone-line {
    left: -16px;
  }

  .page-about .milestone-item:nth-child(odd) .milestone-phase {
    float: right;
  }

  .page-about .milestone-item:nth-child(odd) .milestone-card {
    clear: both;
  }

  .page-about .tech-grid {
    grid-template-columns: 1fr 0.9fr;
    gap: 56px;
    align-items: start;
  }

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

  .page-about .stats-panel {
    padding: 48px 40px;
  }

  .page-about .stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .timeline-visual {
    margin-top: 16px;
    max-width: 680px;
  }
}

@media (min-width: 1024px) {
  .page-about .hero-stats {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .credential-card {
    padding: 32px 28px;
  }

  .page-about .tech-list li {
    padding: 22px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
  }

  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
  }
}