/* ============================================================
   product-baidai.css — 保代智能文案助手产品页
   内容口径：以宣传广告视频为唯一事实源
   依赖：css/style.css 的设计变量与通用类
   ============================================================ */

/* ---------- Hero ---------- */
.pbd-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}

.pbd-hero .particle-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.pbd-hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.pbd-badge {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--border-glow);
  border-radius: 999px;
  font-size: 0.8125rem;
  color: var(--accent-secondary);
  letter-spacing: 0.1em;
  margin-bottom: 24px;
  background: rgba(230, 0, 18, 0.06);
}

.pbd-hero-title {
  font-size: clamp(2.25rem, 1.5rem + 3.5vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.pbd-hero-slogan {
  font-size: clamp(1.5rem, 1.1rem + 2vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 20px;
  background: linear-gradient(120deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.pbd-hero-desc {
  color: var(--text-secondary);
  font-size: 1.0625rem;
  max-width: 480px;
  margin-bottom: 36px;
}

.pbd-hero-visual {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6), 0 0 60px rgba(230, 0, 18, 0.12);
  transform: perspective(1200px) rotateY(-6deg);
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.pbd-hero-visual:hover {
  transform: perspective(1200px) rotateY(0deg);
}

.pbd-hero-visual img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 通用图文分栏 ---------- */
.pbd-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.pbd-split.reverse > .pbd-split-visual {
  order: 2;
}

.pbd-split-visual {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  box-shadow: 0 16px 60px rgba(0, 0, 0, 0.5);
}

.pbd-split-visual img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.pbd-split-visual:hover img {
  transform: scale(1.03);
}

.pbd-split-body h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.pbd-split-body p {
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* ---------- 视频版块 ---------- */
.pbd-video-wrap {
  max-width: 900px;
  margin: 0 auto;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6), 0 0 80px rgba(230, 0, 18, 0.08);
}

.pbd-video-wrap video {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 痛点卡片 ---------- */
.pbd-pain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.pbd-pain-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 32px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.pbd-pain-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.pbd-pain-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
}

.pbd-pain-card:hover::before {
  opacity: 1;
}

.pbd-pain-num {
  font-size: 0.8125rem;
  color: var(--accent-primary);
  font-weight: 700;
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}

.pbd-pain-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.pbd-pain-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* ---------- 人设库 chips ---------- */
.pbd-persona-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.pbd-chip {
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  font-size: 0.9375rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.pbd-chip:hover {
  border-color: var(--border-glow);
  color: var(--text-primary);
  background: rgba(230, 0, 18, 0.08);
}

/* ---------- 平台标签 ---------- */
.pbd-platform-row {
  display: flex;
  gap: 16px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.pbd-platform {
  flex: 1;
  min-width: 140px;
  text-align: center;
  padding: 20px 16px;
  border-radius: 14px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  transition: var(--transition);
}

.pbd-platform:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
}

.pbd-platform strong {
  display: block;
  font-size: 1.0625rem;
  margin-bottom: 4px;
}

.pbd-platform span {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* ---------- 三层合规引擎 ---------- */
.pbd-layers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.pbd-layer {
  position: relative;
  border-radius: 16px;
  padding: 36px 28px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  transition: var(--transition);
}

.pbd-layer:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(230, 0, 18, 0.1);
}

.pbd-layer-step {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.125rem;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-primary), #8f000b);
  margin-bottom: 20px;
  box-shadow: 0 8px 24px rgba(230, 0, 18, 0.35);
}

.pbd-layer h3 {
  font-size: 1.1875rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.pbd-layer p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* ---------- 转化路径（复用 process 风格的三步） ---------- */
.pbd-path {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
}

.pbd-path-item {
  text-align: center;
  padding: 40px 24px;
  border-radius: 16px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  transition: var(--transition);
}

.pbd-path-item:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
}

.pbd-path-node {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--accent-primary);
  border: 1.5px solid var(--border-glow);
  background: rgba(230, 0, 18, 0.06);
}

.pbd-path-item h3 {
  font-size: 1.1875rem;
  margin-bottom: 8px;
}

.pbd-path-item p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.pbd-path-arrow {
  display: none;
}

/* ---------- CTA 收尾 ---------- */
.pbd-cta {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--border-glow);
}

.pbd-cta-bg {
  position: absolute;
  inset: 0;
}

.pbd-cta-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.pbd-cta-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(2, 2, 2, 0.92) 30%, rgba(2, 2, 2, 0.55));
}

.pbd-cta-inner {
  position: relative;
  z-index: 1;
  padding: 96px 64px;
  max-width: 640px;
}

.pbd-cta-inner h2 {
  font-size: clamp(1.75rem, 1.3rem + 2vw, 2.75rem);
  font-weight: 800;
  margin-bottom: 16px;
}

.pbd-cta-inner p {
  color: var(--text-secondary);
  font-size: 1.0625rem;
  margin-bottom: 36px;
}

.pbd-cta-note {
  margin-top: 20px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .pbd-pain-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pbd-layers,
  .pbd-path {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
  }
  .pbd-layers {
    margin-top: 40px;
  }
}

@media (max-width: 900px) {
  .pbd-hero-grid,
  .pbd-split {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .pbd-hero-visual {
    transform: none;
    max-width: 560px;
  }
  .pbd-split.reverse > .pbd-split-visual {
    order: 0;
  }
  .pbd-cta-inner {
    padding: 64px 32px;
  }
}

@media (max-width: 640px) {
  .pbd-pain-grid {
    grid-template-columns: 1fr;
  }
  .pbd-hero {
    padding-top: 104px;
  }
}