/* ============================================
   产品详情页样式 — Template A
   SaaS 视频平台 / 播放器 SDK / 转码服务
   ============================================ */

/* --- Page Hero (深色) --- */
.page-hero {
  position: relative;
  padding: 160px 0 96px;
  background: var(--color-black);
  color: var(--color-white);
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  opacity: 0.05;
}

.page-hero .container { position: relative; z-index: 1; }

.page-hero h1 {
  color: var(--color-white);
  margin-bottom: 20px;
  max-width: 720px;
}

.page-hero .hero-desc {
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--color-grey-light);
  max-width: 600px;
  margin-bottom: 32px;
}

.page-hero .hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* --- Feature Grid (白色) --- */
.feature-grid-section {
  padding: var(--section-padding) 0;
  background: var(--color-white);
}

.feature-grid-section .section-header {
  text-align: center;
  margin-bottom: 64px;
}

.feature-grid-section .section-header p {
  color: var(--color-grey);
  font-size: 1.0625rem;
  line-height: 1.7;
  max-width: 700px;
  margin: 16px auto 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  padding: 40px 32px;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.feature-card:hover {
  border-color: rgba(0, 106, 237, 0.2);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.feature-card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  color: var(--color-blue);
}

.feature-card-icon svg { width: 100%; height: 100%; }

.feature-card h3 {
  margin-bottom: 10px;
  color: var(--color-dark);
}

.feature-card p {
  color: var(--color-grey);
  font-size: 0.9375rem;
  line-height: 1.65;
}

/* --- 技术规格 (浅灰) --- */
.specs-section {
  padding: var(--section-padding) 0;
  background: var(--color-grey-lighter);
}

.specs-section .section-header {
  text-align: center;
  margin-bottom: 48px;
}

.specs-section .section-header p {
  color: var(--color-grey);
  font-size: 1.0625rem;
  line-height: 1.7;
  max-width: 700px;
  margin: 16px auto 0;
}

.specs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}

.spec-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--color-border-light);
}

.spec-card h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.spec-card p {
  color: var(--color-grey);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* --- 集成示例 (白色) --- */
.integration-section {
  padding: var(--section-padding) 0;
  background: var(--color-white);
}

.integration-section .section-header {
  text-align: center;
  margin-bottom: 48px;
}

.code-block {
  background: var(--color-black);
  border-radius: var(--radius-md);
  padding: 32px;
  max-width: 720px;
  margin: 0 auto 32px;
  overflow-x: auto;
}

.code-block pre {
  color: var(--color-grey-light);
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.875rem;
  line-height: 1.7;
  white-space: pre;
}

.code-block .code-comment { color: #6A737D; }
.code-block .code-keyword { color: #F97583; }
.code-block .code-string { color: #9ECBFF; }
.code-block .code-function { color: #B392F0; }

.platform-badges {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-grey);
}

/* --- 适用场景（深色玻璃卡片） --- */
.scenarios-section {
  padding: var(--section-padding) 0;
  background: var(--color-black);
  position: relative;
  overflow: hidden;
}

.scenarios-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 55% 45% at 20% 0%, rgba(37, 99, 235, 0.07) 0%, transparent 70%),
    radial-gradient(ellipse 40% 50% at 85% 100%, rgba(14, 165, 233, 0.05) 0%, transparent 60%);
  pointer-events: none;
}

.scenarios-section::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 256px 256px;
  pointer-events: none;
}

.scenarios-section .container { position: relative; z-index: 1; }

.scenarios-section .section-header {
  text-align: center;
  margin-bottom: 64px;
}

.scenarios-section .section-label { color: var(--color-blue-light); }
.scenarios-section h2 { color: var(--color-white); }
.scenarios-section .section-desc { color: var(--color-grey-light); }

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.scenario-card {
  position: relative;
  padding: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.035) 0%, rgba(255, 255, 255, 0.008) 100%);
  transition: all 0.35s ease;
  overflow: hidden;
}

.scenario-card::before {
  content: attr(data-num);
  position: absolute;
  top: -12px;
  right: 20px;
  font-size: 7rem;
  font-weight: 800;
  line-height: 1;
  color: rgba(255, 255, 255, 0.025);
  pointer-events: none;
  transition: color 0.35s ease;
  letter-spacing: -0.04em;
}

.scenario-card:hover {
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-3px);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.25);
}

.scenario-card:hover::before {
  color: rgba(255, 255, 255, 0.045);
}

.scenario-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  background: var(--sc-accent-bg);
  color: var(--sc-accent);
}

.scenario-icon svg {
  width: 26px;
  height: 26px;
}

.scenario-card h3 {
  color: var(--color-white);
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.scenario-card > p {
  color: var(--color-grey-light);
  font-size: 0.9375rem;
  line-height: 1.75;
}

/* 卡片颜色变体 */
.scenario-card[data-num="01"] { --sc-accent: #60A5FA; --sc-accent-bg: rgba(37, 99, 235, 0.12); }
.scenario-card[data-num="02"] { --sc-accent: #22D3EE; --sc-accent-bg: rgba(14, 165, 233, 0.12); }
.scenario-card[data-num="03"] { --sc-accent: #34D399; --sc-accent-bg: rgba(16, 185, 129, 0.12); }
.scenario-card[data-num="04"] { --sc-accent: #A78BFA; --sc-accent-bg: rgba(139, 92, 246, 0.12); }

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

@media (max-width: 768px) {
  .page-hero { padding: 120px 0 64px; }
  .page-hero h1 { font-size: 2rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .specs-grid { grid-template-columns: 1fr; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .scenario-card { padding: 32px 28px; }
  .scenario-card::before { font-size: 5rem; right: 12px; }
}