/* ===== OPPO Mother's Day Poster Gallery — CSS ===== */
/* 研究型 mockup 展示页面样式 */

:root {
  --bg-primary: #FAF8F5;
  --bg-secondary: #F0EDE8;
  --text-primary: #2C2C2C;
  --text-secondary: #6B6B6B;
  --accent-red: #C41E3A;
  --accent-gold: #8B7355;
  --border-color: #E0D8D0;
  --card-bg: #FFFFFF;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  padding: 0;
  margin: 0;
}

/* Header / Warning Banner */
.disclaimer-banner {
  background: #2C2C2C;
  color: #E8D8C0;
  padding: 14px 24px;
  text-align: center;
  font-size: 0.875rem;
  line-height: 1.5;
}

.disclaimer-banner strong {
  color: #FFD080;
}

.page-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 48px 24px 36px;
  text-align: center;
}

.page-header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: 0;
}

.page-header .subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.page-header .meta-info {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.page-header .meta-info span {
  background: var(--card-bg);
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

/* Main content */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

/* Section headers */
.section-header {
  margin-bottom: 32px;
}

.section-header h2 {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.section-header p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Overview cards */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}

.overview-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
}

.overview-card h3 {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-gold);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.overview-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Poster Gallery */
.poster-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  margin-bottom: 64px;
}

.poster-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
}

.poster-preview {
  width: 100%;
  background: #E8E4E0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  border-bottom: 1px solid var(--border-color);
}

.poster-preview img {
  width: 100%;
  max-width: 360px;
  height: auto;
  border-radius: 4px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

.poster-info {
  padding: 20px;
}

.poster-info h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.poster-info .scene {
  font-size: 0.8rem;
  color: var(--accent-gold);
  font-weight: 600;
  margin-bottom: 12px;
}

.poster-info .copy-block {
  background: var(--bg-secondary);
  border-left: 3px solid var(--accent-red);
  padding: 10px 14px;
  margin-bottom: 12px;
  border-radius: 0 4px 4px 0;
}

.poster-info .copy-block .main-copy {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.poster-info .copy-block .sub-copy {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.poster-info .analysis {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.poster-info .analysis strong {
  color: var(--text-primary);
}

/* Campaign Strategy Section */
.strategy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}

.strategy-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
}

.strategy-item h4 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.strategy-item h4 .icon {
  font-size: 1.1rem;
}

.strategy-item p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Footer */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 32px 24px;
  text-align: center;
}

footer p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

footer .disclaimer {
  font-size: 0.75rem;
  color: #A09080;
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Responsive */
@media (max-width: 600px) {
  .page-header h1 {
    font-size: 1.5rem;
  }

  .poster-gallery {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 768px) {
  .poster-gallery {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
  }
}

/* Print styles */
@media print {
  .disclaimer-banner {
    background: #333;
    color: #ccc;
  }

  .poster-preview {
    background: white;
  }

  .poster-item {
    break-inside: avoid;
    margin-bottom: 24px;
  }
}

/* ===== Photo Tip (影像任务) ===== */
.photo-tip {
  background: rgba(74, 122, 74, 0.08);
  border-left: 3px solid #4A7A4A;
  padding: 6px 10px;
  margin-top: 8px;
  font-size: 0.8rem;
  color: #4A7A4A;
  border-radius: 0 4px 4px 0;
}