/* 参考数字化解决方案模板：圆形轮播 / 故障标题 / 打字机 / 滚动渐入 */

.about-page {
  --about-cyan: #3cf0ff;
  --about-lime: #b8ff3c;
  --about-amber: #ffb84d;
  --about-steel: #9eb6d4;
  --about-line: rgba(60, 240, 255, 0.18);
  --about-panel: rgba(6, 16, 30, 0.72);
}

.about-particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.about-topbar {
  position: relative;
  z-index: 5;
  padding: 1.1rem 0 0;
}

.about-topbar-inner {
  width: min(1180px, calc(100vw - 2rem));
  margin: 0 auto;
  display: flex;
  justify-content: center;
}

.about-hero {
  position: relative;
  z-index: 2;
  min-height: calc(100vh - 5rem);
  min-height: calc(100dvh - 5rem);
  display: flex;
  align-items: center;
  padding: 1.5rem 0 3rem;
  overflow: hidden;
}

.about-hero-inner {
  width: min(1180px, calc(100vw - 2rem));
  margin: 0 auto;
  text-align: center;
}

.about-eyebrow {
  font-family: var(--font-display);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: var(--about-cyan);
  margin: 0 0 1rem;
}

.about-glitch-title {
  position: relative;
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.6rem);
  letter-spacing: 0.08em;
  color: var(--text);
  text-shadow: 0 0 30px rgba(60, 240, 255, 0.3);
  animation: aboutGlitchSkew 5s infinite linear alternate-reverse;
}

.about-glitch-title::before,
.about-glitch-title::after {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  background: transparent;
  overflow: hidden;
  clip-path: inset(0 0 0 0);
}

.about-glitch-title::before {
  left: 2px;
  text-shadow: -2px 0 var(--about-cyan);
  animation: aboutGlitch1 2.4s infinite linear alternate-reverse;
}

.about-glitch-title::after {
  left: -2px;
  text-shadow: 2px 0 var(--about-lime);
  animation: aboutGlitch2 3s infinite linear alternate-reverse;
}

.about-hero-sub {
  margin: 0 0 1.75rem;
  color: var(--about-steel);
  font-size: 1.15rem;
  letter-spacing: 0.08em;
}

.about-carousel-wrap {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 1.25rem;
  margin: 0 auto 1.75rem;
  max-width: 720px;
}

.about-carousel {
  position: relative;
  width: min(92vw, 460px);
  aspect-ratio: 1;
  margin: 0 auto;
}

.about-carousel-item {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 4.6rem;
  height: 4.6rem;
  margin: -2.3rem 0 0 -2.3rem;
  border-radius: 50%;
  border: 1px solid rgba(60, 240, 255, 0.35);
  background: rgba(4, 12, 22, 0.88);
  color: var(--about-steel);
  font-family: var(--font-display);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0.35rem;
  cursor: pointer;
  transition: transform 0.45s ease, border-color 0.35s ease, box-shadow 0.35s ease, color 0.35s ease;
  transform: rotate(var(--angle)) translate(var(--radius)) rotate(calc(-1 * var(--angle)));
}

.about-carousel-item.active {
  color: var(--bg-deep);
  background: var(--about-cyan);
  border-color: var(--about-cyan);
  box-shadow: 0 0 28px rgba(60, 240, 255, 0.55);
  transform: rotate(var(--angle)) translate(var(--radius)) rotate(calc(-1 * var(--angle))) scale(1.12);
}

.about-carousel-core {
  position: absolute;
  inset: 34%;
  border-radius: 50%;
  border: 1px dashed rgba(60, 240, 255, 0.35);
  display: grid;
  place-items: center;
  pointer-events: none;
}

.about-carousel-core::before {
  content: "";
  width: 38%;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 30%, #fff, var(--about-cyan) 40%, transparent 70%),
    rgba(60, 240, 255, 0.35);
  box-shadow: 0 0 30px rgba(60, 240, 255, 0.5);
  animation: aboutNodePulse 2.6s ease-in-out infinite;
}

.about-service-info {
  min-height: 8.5rem;
}

.about-typewriter {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3vw, 1.7rem);
  letter-spacing: 0.06em;
  color: var(--about-lime);
  border-right: 2px solid var(--about-lime);
  display: inline-block;
  white-space: nowrap;
  overflow: hidden;
  max-width: 100%;
  animation: aboutCaret 0.9s step-end infinite;
}

.about-service-desc {
  margin: 0 auto 0.85rem;
  max-width: 28rem;
  color: var(--muted);
  min-height: 2.6em;
  transition: opacity 0.28s ease, transform 0.28s ease;
}

.about-service-desc.is-swap {
  opacity: 0;
  transform: translateY(8px);
}

.about-mini-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
  margin-bottom: 0.85rem;
}

.about-mini-stats span {
  border: 1px solid var(--about-line);
  padding: 0.3rem 0.65rem;
  font-size: 0.85rem;
  color: var(--about-steel);
}

.about-mini-stats strong {
  color: var(--about-cyan);
  margin-right: 0.25rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.about-carousel-controls {
  display: flex;
  justify-content: center;
  gap: 0.55rem;
}

.about-ctrl {
  appearance: none;
  border: 1px solid var(--about-line);
  background: rgba(4, 12, 22, 0.75);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  padding: 0.45rem 0.8rem;
  cursor: pointer;
}

.about-ctrl:hover,
.about-ctrl-auto[aria-pressed="true"] {
  border-color: var(--about-cyan);
  color: var(--about-cyan);
  box-shadow: 0 0 16px rgba(60, 240, 255, 0.25);
}

.about-cta-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.about-main {
  position: relative;
  z-index: 2;
  width: min(1180px, calc(100vw - 2rem));
  margin: 0 auto;
  padding: 0 0 3.5rem;
}

.about-section {
  padding: 4rem 0;
  border-top: 1px solid var(--about-line);
}

.about-section-head {
  margin-bottom: 2rem;
  max-width: 40rem;
}

.about-section-kicker {
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--about-amber);
  margin: 0 0 0.75rem;
}

.about-section-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  letter-spacing: 0.04em;
  line-height: 1.25;
}

.about-section-desc {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.about-service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.about-service {
  padding: 1.35rem 1.1rem 1.45rem;
  border: 1px solid var(--about-line);
  background: linear-gradient(180deg, rgba(60, 240, 255, 0.07), transparent 60%);
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.about-service:hover {
  transform: translateY(-6px);
  border-color: rgba(60, 240, 255, 0.55);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35), 0 0 20px rgba(60, 240, 255, 0.12);
}

.about-service-icon {
  display: inline-flex;
  width: 2.3rem;
  height: 2.3rem;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.85rem;
  border: 1px solid rgba(60, 240, 255, 0.35);
  color: var(--about-cyan);
  font-family: var(--font-display);
}

.about-service h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.04em;
}

.about-service p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  margin: 0.5rem 0 1rem;
}

.about-stat {
  background: rgba(4, 10, 18, 0.94);
  padding: 1.5rem 1rem;
  text-align: center;
}

.about-stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  letter-spacing: 0.04em;
  color: var(--about-cyan);
  margin-bottom: 0.4rem;
}

.about-stat span {
  color: var(--muted);
  font-size: 0.95rem;
}

.about-why {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}

.about-check-list {
  list-style: none;
  margin: 1.25rem 0 1.5rem;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.about-check-list li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--about-steel);
}

.about-check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--about-lime);
  font-weight: 700;
}

.about-hex-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  min-height: 280px;
}

.about-hex-grid span {
  display: grid;
  place-items: center;
  border: 1px solid var(--about-line);
  background: var(--about-panel);
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--about-cyan);
  min-height: 5.2rem;
  animation: aboutHexGlow 3.8s ease-in-out infinite;
}

.about-hex-grid span:nth-child(2) { animation-delay: 0.3s; color: var(--about-lime); }
.about-hex-grid span:nth-child(3) { animation-delay: 0.6s; }
.about-hex-grid span:nth-child(4) { animation-delay: 0.9s; color: var(--about-amber); }
.about-hex-grid span:nth-child(5) { animation-delay: 1.2s; }
.about-hex-grid span:nth-child(6) { animation-delay: 1.5s; color: var(--about-lime); }

.about-process {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.about-process-item {
  padding: 1rem 0.2rem 0.5rem;
  border-top: 2px solid rgba(255, 184, 77, 0.45);
}

.about-process-item span {
  display: block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--about-amber);
  margin-bottom: 0.55rem;
}

.about-process-item h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
}

.about-process-item p {
  margin: 0;
  color: var(--muted);
}

.about-cta-band {
  margin-top: 1.5rem;
  padding: 3rem 1.25rem;
  border: 1px solid var(--about-line);
  text-align: center;
  background:
    radial-gradient(ellipse 70% 90% at 15% 40%, rgba(60, 240, 255, 0.12), transparent 55%),
    radial-gradient(ellipse 50% 80% at 90% 60%, rgba(184, 255, 60, 0.08), transparent 50%),
    rgba(6, 14, 26, 0.88);
}

.about-cta-band .about-section-desc {
  margin: 0 auto 1.5rem;
  max-width: 34rem;
}

/* AOS-like */
[data-aos] {
  opacity: 0;
  transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-aos="fade-up"] { transform: translateY(28px); }
[data-aos="fade-down"] { transform: translateY(-28px); }
[data-aos="fade-left"] { transform: translateX(36px); }
[data-aos="fade-right"] { transform: translateX(-36px); }

[data-aos].is-visible {
  opacity: 1;
  transform: none;
}

@keyframes aboutGlitch1 {
  0% { clip-path: inset(20% 0 60% 0); }
  20% { clip-path: inset(45% 0 20% 0); }
  40% { clip-path: inset(10% 0 55% 0); }
  60% { clip-path: inset(70% 0 5% 0); }
  80% { clip-path: inset(30% 0 40% 0); }
  100% { clip-path: inset(55% 0 15% 0); }
}

@keyframes aboutGlitch2 {
  0% { clip-path: inset(65% 0 10% 0); }
  25% { clip-path: inset(15% 0 50% 0); }
  50% { clip-path: inset(40% 0 25% 0); }
  75% { clip-path: inset(5% 0 70% 0); }
  100% { clip-path: inset(50% 0 20% 0); }
}

@keyframes aboutGlitchSkew {
  0% { transform: none; }
  95% { transform: none; }
  96% { transform: skewX(8deg); }
  97% { transform: skewX(-6deg); }
  98% { transform: none; }
}

@keyframes aboutCaret {
  50% { border-color: transparent; }
}

@keyframes aboutNodePulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

@keyframes aboutHexGlow {
  0%, 100% { box-shadow: inset 0 0 0 rgba(60, 240, 255, 0); }
  50% { box-shadow: inset 0 0 28px rgba(60, 240, 255, 0.12); }
}

@media (max-width: 980px) {
  .about-service-grid,
  .about-stats,
  .about-process,
  .about-why {
    grid-template-columns: 1fr 1fr;
  }

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

  .about-carousel {
    width: min(92vw, 360px);
  }

  .about-carousel-item {
    width: 3.8rem;
    height: 3.8rem;
    margin: -1.9rem 0 0 -1.9rem;
    font-size: 0.55rem;
  }
}

@media (max-width: 640px) {
  .about-service-grid,
  .about-stats,
  .about-process {
    grid-template-columns: 1fr;
  }

  .about-hero {
    min-height: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .about-glitch-title,
  .about-glitch-title::before,
  .about-glitch-title::after,
  .about-typewriter,
  .about-carousel-core::before,
  .about-hex-grid span,
  [data-aos] {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
    clip-path: none !important;
    border-right-color: transparent !important;
  }
}