/* ===== About Page - AI Era Design ===== */

/* ① 全屏暗色 Hero */
.about-hero-dark {
  position: relative;
  min-height: 100vh;
  background: #050510;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 80px;
}

#neuralCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
}

.ah-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
}
.ah-glow-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(102,126,234,0.35) 0%, transparent 70%);
  top: -200px; left: -200px;
  animation: glowPulse 6s ease-in-out infinite;
}
.ah-glow-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(118,75,162,0.3) 0%, transparent 70%);
  bottom: -150px; right: -100px;
  animation: glowPulse 8s ease-in-out infinite reverse;
}
.ah-glow-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(240,147,251,0.2) 0%, transparent 70%);
  top: 40%; left: 60%;
  animation: glowPulse 5s ease-in-out infinite 2s;
}

@keyframes glowPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.15); opacity: 0.7; }
}

.ah-inner {
  position: relative;
  z-index: 2;
  max-width: 820px;
  padding: 80px 0;
}

.ah-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(102,126,234,0.12);
  border: 1px solid rgba(102,126,234,0.3);
  border-radius: 100px;
  padding: 8px 20px;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.08em;
  margin-bottom: 32px;
  backdrop-filter: blur(10px);
}

.pulse-dot {
  width: 8px; height: 8px;
  background: #667eea;
  border-radius: 50%;
  animation: pulseDot 2s ease-in-out infinite;
  box-shadow: 0 0 8px #667eea;
}

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

.ah-title {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 900;
  line-height: 1.08;
  color: white;
  margin-bottom: 28px;
  letter-spacing: -0.02em;
}

.ah-line1, .ah-line3 {
  display: block;
}

.ah-line2 {
  display: block;
}

.gradient-glow-text {
  background: linear-gradient(135deg, #667eea 0%, #f093fb 50%, #f5576c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 30px rgba(102,126,234,0.5));
  animation: textGlow 3s ease-in-out infinite;
}

@keyframes textGlow {
  0%, 100% { filter: drop-shadow(0 0 20px rgba(102,126,234,0.5)); }
  50% { filter: drop-shadow(0 0 40px rgba(240,147,251,0.7)); }
}

.ah-desc {
  font-size: 1.2rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.6);
  margin-bottom: 56px;
}

.ah-scroll-hint {
  display: flex;
  align-items: center;
  gap: 16px;
  color: rgba(255,255,255,0.4);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
}

.ah-arrow-wrap {
  width: 40px; height: 40px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  animation: arrowBounce 2s ease-in-out infinite;
}

.ah-arrow {
  width: 8px; height: 8px;
  border-right: 2px solid rgba(255,255,255,0.5);
  border-bottom: 2px solid rgba(255,255,255,0.5);
  transform: rotate(45deg);
  margin-top: -4px;
}

@keyframes arrowBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ② AI威胁对比区 */
.ai-threat {
  padding: 100px 0;
  background: #f8f9ff;
  position: relative;
  overflow: hidden;
}

.ai-threat::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, #667eea, #f093fb, #f5576c);
}

.threat-header {
  text-align: center;
  margin-bottom: 60px;
}

.threat-badge {
  display: inline-block;
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 6px 18px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.threat-header h2 {
  font-size: 2.8rem;
  font-weight: 900;
  color: #0f0f23;
  letter-spacing: -0.02em;
}

.threat-vs {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0;
  align-items: center;
  margin-bottom: 50px;
  background: white;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}

.threat-side {
  padding: 48px 40px;
}

.old-world {
  background: linear-gradient(135deg, #f8f9ff 0%, #eef0ff 100%);
}

.new-world {
  background: linear-gradient(135deg, #1a0a0a 0%, #2d0f0f 100%);
}

.side-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid currentColor;
  opacity: 0.6;
}

.old-label { color: #4a5568; border-color: rgba(74,85,104,0.2); }
.new-label { color: #fc8181; border-color: rgba(252,129,129,0.2); }

.threat-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 32px;
}

.threat-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 1rem;
  line-height: 1.5;
}

.old-world .threat-list li { color: #4a5568; }
.new-world .threat-list li { color: rgba(255,255,255,0.85); }

.tl-icon {
  flex-shrink: 0;
  width: 24px; height: 24px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem;
  font-weight: 900;
  margin-top: 1px;
}

.tl-red { background: rgba(239,68,68,0.15); color: #ef4444; }
.tl-orange { background: rgba(245,101,44,0.25); color: #f97316; }

.side-verdict {
  font-size: 0.875rem;
  font-weight: 700;
  padding: 10px 18px;
  border-radius: 8px;
  display: inline-block;
}

.old-verdict { background: rgba(102,126,234,0.1); color: #667eea; }
.new-verdict { background: rgba(245,101,44,0.2); color: #f97316; }

.vs-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 0 32px;
}

.vs-line {
  width: 1px;
  flex: 1;
  background: linear-gradient(to bottom, transparent, rgba(102,126,234,0.3), transparent);
  min-height: 80px;
}

.vs-badge {
  width: 52px; height: 52px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: white;
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  box-shadow: 0 8px 24px rgba(102,126,234,0.4);
  flex-shrink: 0;
}

.threat-insight {
  background: linear-gradient(135deg, #1a1a3e 0%, #2d1b69 100%);
  border-radius: 20px;
  padding: 36px 48px;
  display: flex;
  align-items: flex-start;
  gap: 20px;
  border: 1px solid rgba(102,126,234,0.2);
}

.insight-icon { font-size: 2rem; flex-shrink: 0; margin-top: 2px; }

.threat-insight p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.8);
}

.threat-insight strong {
  color: white;
  font-weight: 700;
}

/* ③ 故事时间线 */
.our-story {
  position: relative;
  padding: 100px 0;
  background: #08080f;
  overflow: hidden;
}

.story-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 20% 30%, rgba(102,126,234,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 80% 70%, rgba(118,75,162,0.07) 0%, transparent 60%);
}

.story-intro {
  text-align: center;
  margin-bottom: 80px;
  position: relative;
  z-index: 1;
}

.story-intro h2 {
  font-size: 2.8rem;
  font-weight: 900;
  color: white;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.story-intro p {
  color: rgba(255,255,255,0.5);
  font-size: 1.1rem;
}

/* 时间线主轴 */
.story-timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  z-index: 1;
}

.story-timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, transparent, #667eea 15%, #f093fb 85%, transparent);
  transform: translateX(-50%);
}

.stl-item {
  display: grid;
  grid-template-columns: 1fr 80px 1fr;
  gap: 0;
  align-items: start;
  margin-bottom: 64px;
}

.stl-item:last-child { margin-bottom: 0; }

.stl-item .stl-card { grid-column: 1; }
.stl-item .stl-dot { grid-column: 2; justify-self: center; }

/* 右侧项目 */
.stl-right .stl-card {
  grid-column: 3;
  grid-row: 1;
}
.stl-right .stl-dot {
  grid-column: 2;
  grid-row: 1;
}

/* 左侧空位 */
.stl-right .stl-card ~ * { display: none; }

.stl-dot {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem;
  font-weight: 800;
  color: white;
  letter-spacing: -0.02em;
  box-shadow: 0 0 0 4px rgba(102,126,234,0.15), 0 0 20px rgba(102,126,234,0.3);
  position: relative;
  z-index: 2;
  margin-top: 20px;
}

.stl-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  padding: 28px 32px;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.stl-card:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(102,126,234,0.3);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.stl-year-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: #667eea;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.stl-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: white;
  margin-bottom: 12px;
}

.stl-card p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: rgba(255,255,255,0.55);
}

/* ④ 霓虹数据统计 */
.neon-stats {
  background: #050510;
  padding: 80px 0;
  border-top: 1px solid rgba(102,126,234,0.1);
  border-bottom: 1px solid rgba(102,126,234,0.1);
}

.neon-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}

.neon-stat {
  text-align: center;
  padding: 48px 32px;
  position: relative;
  border-right: 1px solid rgba(255,255,255,0.05);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.neon-stat:last-child { border-right: none; }

.neon-stat::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 100%, rgba(102,126,234,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.ns-number {
  font-size: 4rem;
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, #667eea, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
}

.neon-stat:nth-child(2) .ns-number { background: linear-gradient(135deg, #f093fb, #f5576c); -webkit-background-clip: text; background-clip: text; }
.neon-stat:nth-child(3) .ns-number { background: linear-gradient(135deg, #4facfe, #00f2fe); -webkit-background-clip: text; background-clip: text; }
.neon-stat:nth-child(4) .ns-number { background: linear-gradient(135deg, #43e97b, #38f9d7); -webkit-background-clip: text; background-clip: text; }

.ns-unit {
  font-size: 2rem;
  font-weight: 900;
  color: rgba(255,255,255,0.3);
  line-height: 1;
  margin-bottom: 8px;
  align-self: flex-start;
  margin-top: 6px;
}

.ns-label {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.4);
  margin-top: 12px;
  letter-spacing: 0.04em;
}

.ns-bar {
  width: 48px; height: 3px;
  background: linear-gradient(90deg, #667eea, #764ba2);
  border-radius: 2px;
  margin-top: 20px;
  position: relative;
  overflow: hidden;
}

.ns-bar::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: rgba(255,255,255,0.6);
  animation: barShine 3s ease-in-out infinite;
}

.ns-bar-pink { background: linear-gradient(90deg, #f093fb, #f5576c); }
.ns-bar-cyan { background: linear-gradient(90deg, #4facfe, #00f2fe); }
.ns-bar-green { background: linear-gradient(90deg, #43e97b, #38f9d7); }

@keyframes barShine {
  0% { left: -100%; }
  50%, 100% { left: 100%; }
}

/* ⑤ 使命愿景全宽 */
.mission-fullwidth {
  position: relative;
  background: #0c0c20;
  padding: 100px 0;
  overflow: hidden;
}

.mfw-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.mfw-sphere {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
}

.mfw-sphere.s1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(102,126,234,0.2) 0%, transparent 70%);
  top: -200px; left: -100px;
}

.mfw-sphere.s2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(240,147,251,0.15) 0%, transparent 70%);
  bottom: -150px; right: -50px;
}

.mfw-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0;
  align-items: stretch;
  min-height: 300px;
}

.mfw-block {
  padding: 60px 48px;
  position: relative;
}

.mfw-divider {
  width: 1px;
  background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.1), transparent);
  margin: 20px 0;
}

.mfw-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #667eea;
  background: rgba(102,126,234,0.1);
  border: 1px solid rgba(102,126,234,0.25);
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.mfw-tag-pink {
  color: #f093fb;
  background: rgba(240,147,251,0.1);
  border-color: rgba(240,147,251,0.25);
}

.mfw-heading {
  font-size: 2.2rem;
  font-weight: 900;
  color: white;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.mfw-desc {
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(255,255,255,0.55);
}

/* ⑥ 玻璃态价值观 */
.values-glass {
  padding: 100px 0;
  background: linear-gradient(180deg, #f0f2ff 0%, #e8eaff 100%);
  position: relative;
}

.values-glass .section-header {
  text-align: center;
  margin-bottom: 60px;
}

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

.vg-card {
  position: relative;
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.9);
  border-radius: 24px;
  padding: 36px 28px;
  overflow: hidden;
  transition: all 0.4s ease;
  cursor: default;
}

.vg-card:hover {
  transform: translateY(-12px);
  box-shadow: 0 32px 64px rgba(0,0,0,0.12);
  background: rgba(255,255,255,0.9);
}

.vg-glow {
  position: absolute;
  width: 160px; height: 160px;
  border-radius: 50%;
  top: -60px; right: -60px;
  filter: blur(50px);
  opacity: 0.4;
  transition: opacity 0.4s;
}

.vg-card:hover .vg-glow { opacity: 0.7; }

.vg-glow-purple { background: radial-gradient(circle, rgba(102,126,234,0.6), transparent); }
.vg-glow-pink { background: radial-gradient(circle, rgba(240,147,251,0.6), transparent); }
.vg-glow-cyan { background: radial-gradient(circle, rgba(79,172,254,0.6), transparent); }
.vg-glow-green { background: radial-gradient(circle, rgba(67,233,123,0.6), transparent); }

.vg-icon {
  width: 60px; height: 60px;
  background: white;
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 24px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

.vg-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: #0f0f23;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.vg-desc {
  font-size: 0.9rem;
  line-height: 1.75;
  color: #64748b;
}

.vg-border {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #667eea, #764ba2);
  transform: scaleX(0);
  transition: transform 0.4s ease;
  transform-origin: left;
}

.vg-card:hover .vg-border { transform: scaleX(1); }

.vg-border-pink { background: linear-gradient(90deg, #f093fb, #f5576c); }
.vg-border-cyan { background: linear-gradient(90deg, #4facfe, #00f2fe); }
.vg-border-green { background: linear-gradient(90deg, #43e97b, #38f9d7); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .vg-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .mfw-grid {
    grid-template-columns: 1fr;
  }

  .mfw-divider {
    width: auto; height: 1px;
    margin: 0;
    background: linear-gradient(to right, transparent, rgba(255,255,255,0.1), transparent);
  }

  .mfw-block {
    padding: 48px 32px;
  }

  .neon-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .neon-stat {
    border-right: none;
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }
}

@media (max-width: 768px) {
  .ah-title {
    font-size: 2.8rem;
  }

  .ah-desc {
    font-size: 1rem;
  }

  .threat-vs {
    grid-template-columns: 1fr;
  }

  .vs-divider {
    flex-direction: row;
    padding: 16px 0;
  }

  .vs-line {
    flex: 1;
    min-height: 0;
    height: 1px;
    width: auto;
    background: linear-gradient(to right, transparent, rgba(102,126,234,0.3), transparent);
  }

  .threat-insight {
    flex-direction: column;
    padding: 28px 24px;
  }

  .story-timeline::before {
    left: 28px;
    transform: none;
  }

  .stl-item {
    grid-template-columns: 56px 1fr;
    gap: 16px;
  }

  .stl-item .stl-card { grid-column: 2; }
  .stl-item .stl-dot { grid-column: 1; }

  .stl-right {
    direction: ltr;
  }

  .stl-right .stl-card {
    grid-column: 2;
    grid-row: auto;
  }

  .threat-header h2 { font-size: 2rem; }

  .story-intro h2 { font-size: 2rem; }

  .mfw-heading { font-size: 1.75rem; }

  .neon-grid { grid-template-columns: repeat(2, 1fr); }

  .vg-grid { grid-template-columns: 1fr; }

  .ns-number { font-size: 3rem; }
}