/**
 * 良心云机场官方网站 - 知识科普与文章页面专属样式
 * 方案 A · 云境光廊 (Corridor of Clouds)
 */

@import url("./variables.css");

/* 页面顶部通栏背景 */
.page-hero {
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 60px;
  background: linear-gradient(180deg, #070E1A 0%, #10243A 100%);
  border-bottom: 1px solid var(--color-border-subtle);
  position: relative;
}

.page-hero-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--color-text-pure);
  margin-bottom: 16px;
  line-height: 1.25;
}

.page-hero-desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 720px;
  line-height: 1.7;
}

/* 面包屑导航 */
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--color-text-dim);
  margin-bottom: 24px;
}

.breadcrumb-nav a {
  color: var(--color-text-muted);
}

.breadcrumb-nav a:hover {
  color: var(--color-accent-cyan);
}

.breadcrumb-separator {
  color: var(--color-text-dim);
}

/* 知识文章主容器 */
.article-container {
  padding: 60px 0 100px 0;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 50px;
  align-items: start;
}

.article-layout.full-width {
  grid-template-columns: 1fr;
}

/* 文章头部与元信息 */
.article-header {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-border-subtle);
}

.article-title {
  font-size: clamp(1.8rem, 3.2vw, 2.5rem);
  font-weight: 800;
  color: var(--color-text-pure);
  line-height: 1.3;
  margin-bottom: 18px;
}

.article-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--color-text-dim);
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 文章核心摘要引言框 */
.article-summary-box {
  background: rgba(16, 36, 58, 0.7);
  border-left: 4px solid var(--color-accent-cyan);
  padding: 22px 26px;
  border-radius: 0 8px 8px 0;
  margin-bottom: 36px;
  font-size: 1.02rem;
  color: var(--color-text-cloud);
  line-height: 1.8;
}

/* 正文排版 */
.article-content {
  font-size: 1.05rem;
  color: var(--color-text-cloud);
  line-height: 1.85;
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text-pure);
  margin-top: 48px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(114, 215, 238, 0.15);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-content h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 22px;
  background: var(--color-accent-cyan);
  border-radius: 2px;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-accent-glow);
  margin-top: 32px;
  margin-bottom: 14px;
}

.article-content p {
  margin-bottom: 20px;
}

.article-content ul, 
.article-content ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content blockquote {
  background: #0B192A;
  border-left: 3px solid var(--color-accent-glow);
  padding: 16px 20px;
  border-radius: 0 6px 6px 0;
  margin: 24px 0;
  color: var(--color-text-muted);
  font-style: italic;
}

/* 提示与避坑卡片 */
.callout-box {
  background: rgba(16, 36, 58, 0.85);
  border: 1px solid var(--color-border-subtle);
  border-radius: 10px;
  padding: 22px;
  margin: 28px 0;
}

.callout-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-accent-cyan);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 侧边栏与目录索引 */
.article-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 30px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget {
  background: var(--color-bg-midnight);
  border: 1px solid var(--color-border-subtle);
  border-radius: 10px;
  padding: 24px;
}

.sidebar-widget-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-pure);
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(114, 215, 238, 0.15);
  padding-bottom: 10px;
}

.sidebar-toc {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.9rem;
}

.sidebar-toc a {
  color: var(--color-text-muted);
  display: block;
  line-height: 1.5;
}

.sidebar-toc a:hover {
  color: var(--color-accent-cyan);
}

/* 知识文章聚合列表网格 */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 40px;
}

.knowledge-card {
  background: var(--color-bg-midnight);
  border: 1px solid var(--color-border-subtle);
  border-radius: 12px;
  padding: 30px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.knowledge-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent-cyan);
  box-shadow: var(--shadow-corridor-lg);
}

.knowledge-card-tag {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-accent-cyan);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.knowledge-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-pure);
  margin-bottom: 14px;
  line-height: 1.4;
}

.knowledge-card-desc {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
  flex: 1;
}

.knowledge-card-meta {
  font-size: 0.82rem;
  color: var(--color-text-dim);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(114, 215, 238, 0.1);
  padding-top: 14px;
}

@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
  .knowledge-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .knowledge-grid {
    grid-template-columns: 1fr;
  }
}