/* WhatsApp AI 智能客服 — 冷色紫蓝背景（与通话翻译官暖米色区分） */

body.ai-body {
  --vt-paper: #eef2ff;
  --vt-paper-2: #e0e7ff;
  --vt-ink: #1e1b4b;
  --vt-ink-muted: #4338ca;
  --vt-ink-soft: #6366f1;
  --vt-coral: #4f46e5;
  --vt-coral-light: #eef2ff;
  --vt-teal: #6d28d9;
  --vt-teal-light: #f5f3ff;
  --vt-border: rgba(79, 70, 229, 0.14);
  --vt-shadow: 0 4px 24px rgba(79, 70, 229, 0.08);
  --vt-shadow-lg: 0 24px 64px rgba(79, 70, 229, 0.12);

  background: linear-gradient(165deg, #eef2ff 0%, #f5f3ff 42%, #ede9fe 100%);
  background-attachment: fixed;
}

body.ai-body .vt-header {
  background: rgba(238, 242, 255, 0.9);
  border-bottom-color: rgba(99, 102, 241, 0.15);
}

body.ai-body .vt-hero::before {
  background: radial-gradient(circle at 80% 20%, rgba(109, 40, 217, 0.18) 0%, transparent 55%),
    radial-gradient(circle at 10% 80%, rgba(79, 70, 229, 0.12) 0%, transparent 50%);
}

body.ai-body .vt-hero::after {
  background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.2), transparent);
}

body.ai-body .vt-section--alt {
  background: rgba(255, 255, 255, 0.72);
  border-top-color: rgba(99, 102, 241, 0.12);
  border-bottom-color: rgba(99, 102, 241, 0.12);
}

body.ai-body .vt-tag {
  background: rgba(255, 255, 255, 0.85);
  border-color: rgba(99, 102, 241, 0.2);
  color: var(--vt-ink-muted);
}

body.ai-body .vt-flow-col {
  background: rgba(255, 255, 255, 0.65);
  border-color: rgba(99, 102, 241, 0.15);
}

body.ai-body .vt-scenario {
  background: rgba(255, 255, 255, 0.7);
  border-color: rgba(99, 102, 241, 0.12);
}

body.ai-body .ai-highlight-card {
  background: rgba(255, 255, 255, 0.88);
  border-color: rgba(99, 102, 241, 0.14);
}

body.ai-body .vt-install-box {
  background: rgba(255, 255, 255, 0.88);
}

body.ai-body .vt-section--dark {
  background: linear-gradient(180deg, #312e81 0%, #1e1b4b 100%);
}

body.ai-body .vt-footer {
  background: #1e1b4b;
}

body.ai-body .vt-footer-bottom {
  border-top-color: rgba(165, 180, 252, 0.15);
}

body.ai-body .vt-modal {
  background: #fafaff;
}

body.ai-body .vt-modal-close {
  background: var(--vt-paper-2);
}

body.ai-body .vt-hero-carousel-dots button {
  background: #c7d2fe;
}

body.ai-body .vt-badge {
  color: var(--vt-teal);
  background: var(--vt-teal-light);
  border-color: rgba(109, 40, 217, 0.2);
}

body.ai-body .vt-badge-dot {
  background: var(--vt-teal);
}

body.ai-body .vt-nav a:hover {
  color: var(--vt-coral);
}

@media (max-width: 720px) {
  body.ai-body .vt-header.is-nav-open .vt-nav {
    background: rgba(238, 242, 255, 0.98);
  }
}

body.ai-body .vt-btn-secondary:hover {
  border-color: var(--vt-coral);
  color: var(--vt-coral);
}

body.ai-body .vt-flow-col--out .vt-steps li::before {
  background: var(--vt-coral);
}

body.ai-body .vt-flow-col--in .vt-steps li::before {
  background: var(--vt-teal);
}

body.ai-body .vt-flow-note {
  color: var(--vt-teal);
  background: var(--vt-teal-light);
  border-color: rgba(109, 40, 217, 0.15);
}

body.ai-body .vt-price-card--featured {
  border-color: var(--vt-coral);
}

body.ai-body .vt-price-badge {
  background: linear-gradient(120deg, var(--vt-coral), #818cf8);
}

body.ai-body .vt-faq-item summary::after {
  color: var(--vt-coral);
}

.ai-highlight-grid {
  display: grid;
  gap: 16px;
}

@media (min-width: 640px) {
  .ai-highlight-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .ai-highlight-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.ai-highlight-card {
  background: #fff;
  border: 1px solid var(--vt-border);
  border-radius: var(--vt-radius);
  padding: 24px;
  box-shadow: var(--vt-shadow);
  transition: box-shadow 0.2s, transform 0.2s;
}

.ai-highlight-card:hover {
  box-shadow: var(--vt-shadow-lg);
  transform: translateY(-2px);
}

.ai-highlight-card--span2 {
  grid-column: span 1;
}

@media (min-width: 960px) {
  .ai-highlight-card--span2 {
    grid-column: span 2;
  }
}

.ai-highlight-icon {
  font-size: 28px;
  margin-bottom: 12px;
  line-height: 1;
}

.ai-highlight-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.ai-highlight-card p {
  font-size: 14px;
  color: var(--vt-ink-muted);
  line-height: 1.65;
}

.ai-cta-band {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
  padding: 48px 32px;
  background: linear-gradient(135deg, #eef2ff 0%, #f5f3ff 50%, #faf5ff 100%);
  border: 1px solid rgba(79, 70, 229, 0.15);
  border-radius: var(--vt-radius-lg);
}

.ai-cta-band h2 {
  font-family: var(--vt-display);
  font-size: clamp(22px, 3vw, 28px);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.ai-cta-band p {
  color: var(--vt-ink-muted);
  margin-bottom: 24px;
  font-size: 15px;
}

.ai-cta-band .vt-hero-actions {
  justify-content: center;
  margin-bottom: 0;
}

/* 首屏右侧轮播 */
.ai-hero-carousel {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.ai-hero-slide {
  margin: 0;
  display: none;
  justify-content: center;
  width: 100%;
}

.ai-hero-slide.is-active {
  display: flex;
}

.ai-hero-slide img {
  width: auto;
  max-width: min(500px, 100%);
  height: auto;
  display: block;
  border-radius: 0;
}

.ai-hero-carousel-dots {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.ai-hero-carousel-dots button {
  width: 8px;
  height: 8px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--vt-paper-2);
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.ai-hero-carousel-dots button.is-active {
  background: var(--vt-coral);
  transform: scale(1.15);
}

.ai-hero-carousel-dots button:hover {
  background: #a5b4fc;
}