/* 博客学习页面样式 */

/* Hero 区域 */
.learn-hero {
  background-color: var(--color-bg);
  padding: 6rem 1rem 4rem;
  border-bottom: 1px solid var(--color-border);
}

.learn-hero .section-title {
  color: var(--color-primary-dark);
}

.learn-hero .section-subtitle {
  max-width: 600px;
  margin: 1rem auto 0;
  color: var(--color-text-light);
  font-size: 1.1rem;
}

/* 博客网格布局 */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
}

/* 博客卡片 */
.blog-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}

/* 渐变标题区域 */
.blog-header {
  height: 180px;
  width: 100%;
}

.gradient-1 { background: linear-gradient(135deg, #a8e063 0%, #56ab2f 100%); }
.gradient-2 { background: linear-gradient(135deg, #f6d365 0%, #fda085 100%); }
.gradient-3 { background: linear-gradient(135deg, #84fab0 0%, #8fd3f4 100%); }
.gradient-4 { background: linear-gradient(135deg, #a1c4fd 0%, #c2e9fb 100%); }
.gradient-5 { background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%); }

.blog-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.blog-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.blog-category {
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.blog-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--color-text);
  margin-bottom: 1rem;
  line-height: 1.3;
}

.blog-excerpt {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.blog-link {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  display: inline-block;
}

.blog-link:hover {
  color: var(--color-accent);
}

/* 大型订阅表单 */
.newsletter-section {
  background-color: var(--color-hero-bg);
  padding: 5rem 1rem;
  border-top: 1px solid var(--color-border);
}

.newsletter-section h2 {
  font-family: var(--font-heading);
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.newsletter-section p {
  color: var(--color-text-light);
  margin-bottom: 2rem;
}

.newsletter-form-large {
  display: flex;
  max-width: 500px;
  margin: 0 auto;
  gap: 0.5rem;
}

.newsletter-form-large input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
}

.newsletter-form-large button {
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
}

@media (max-width: 600px) {
  .newsletter-form-large {
    flex-direction: column;
  }
}