/* =============================================================
 * blog.css
 * 常见问题/博客列表 (blog.html) + 文章占位详情 (article.html) 样式
 * 复用 base/layout/components/animations,本文件只补差异
 * ============================================================= */

/* ===================== Hero (深蓝) ===================== */
.lg-hero {
  background: linear-gradient(135deg, #0030ed 0%, #0045b0 100%);
  padding: 110px 0 90px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.lg-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.12) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(255,255,255,0.08) 0%, transparent 50%);
  pointer-events: none;
}

.lg-hero__inner {
  position: relative;
  z-index: 1;
}

.lg-hero__title {
  font-size: 42px;
  font-weight: 700;
  margin: 0 0 14px;
  color: #fff;
  letter-spacing: 0.5px;
}

.lg-hero__sub {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  margin: 0;
  font-weight: 500;
}

/* ===================== 文章列表 ===================== */
.lg-list {
  padding: var(--space-2xl) 0;
  background: var(--color-bg);
}

.lg-list__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: var(--space-md);
}

.lg-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--duration-base) var(--ease-out);
  display: flex;
  flex-direction: column;
}

.lg-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.lg-card__media {
  position: relative;
  display: block;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background: var(--color-bg-soft);
}

.lg-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}

.lg-card:hover .lg-card__img {
  transform: scale(1.05);
}

.lg-card__img--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #eef3fb 0%, #d8e6f7 100%);
  color: var(--color-primary);
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 1px;
}

.lg-card__body {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.lg-card__date {
  font-size: 13px;
  color: #888;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.lg-card__date::before {
  content: '📅';
  font-size: 12px;
}

.lg-card__title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-heading);
  margin: 0;
  line-height: 1.4;
}

.lg-card__title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.lg-card__title a:hover {
  color: var(--color-primary);
}

.lg-card__more {
  margin-top: auto;
  padding-top: var(--space-xs);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.lg-card__more::after {
  content: '→';
  transition: transform var(--duration-fast) var(--ease-out);
}

.lg-card:hover .lg-card__more::after {
  transform: translateX(4px);
}

/* ===================== 文章详情占位页 ===================== */
.article-page {
  padding: var(--space-2xl) 0;
  background: var(--color-bg);
}

.article-page__inner {
  max-width: 800px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2xl) var(--space-xl);
}

.article-page__back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  color: var(--color-primary);
  text-decoration: none;
  margin-bottom: var(--space-md);
  font-weight: 500;
}

.article-page__back:hover {
  color: var(--color-primary-dark);
}

.article-page__date {
  font-size: 13px;
  color: #888;
  margin: 0 0 var(--space-sm);
}

.article-page__title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-heading);
  line-height: 1.3;
  margin: 0 0 var(--space-lg);
}

.article-page__placeholder {
  background: #fff8e1;
  border-left: 4px solid #ffb300;
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
  font-size: 14px;
  color: #6b5300;
  line-height: 1.7;
}

.article-page__placeholder strong {
  color: #4a3800;
}

.article-page__content {
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-text);
}

.article-page__content p {
  margin: 0 0 var(--space-md);
}

.article-page__actions {
  display: flex;
  gap: 12px;
  margin-top: var(--space-xl);
  flex-wrap: wrap;
}

/* ===================== 响应式 ===================== */
@media (max-width: 980px) {
  .lg-list__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .lg-hero__title {
    font-size: 32px;
  }
}

@media (max-width: 600px) {
  .lg-list__grid {
    grid-template-columns: 1fr;
  }
  .lg-hero {
    padding: 80px 0 60px;
  }
  .lg-hero__title {
    font-size: 26px;
  }
  .article-page__inner {
    padding: var(--space-lg) var(--space-md);
  }
  .article-page__title {
    font-size: 24px;
  }
}