/* ============================================================
   熊猫云挂机 — Blog 样式
   适用于 blog.html 列表页 + blog/articles/*.html 文章页
   ============================================================ */

/* ========== Blog Hero ========== */
.blog-hero {
  position: relative;
  padding: 140px 0 60px;
  overflow: hidden;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.blog-hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 800px 400px at 50% 0%, rgba(6, 182, 212, 0.12), transparent 60%),
    var(--bg);
  z-index: 0;
}
.blog-hero .container { position: relative; z-index: 1; }
.blog-hero h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  font-weight: 900;
  margin: 12px 0 14px;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.blog-hero > p {
  color: var(--fg-1);
  font-size: 1.1rem;
  margin: 0;
  line-height: 1.7;
  max-width: 640px;
}

/* ========== 分类筛选 ========== */
.blog-filter {
  padding: 32px 0 0;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 60px;
  z-index: 50;
  backdrop-filter: blur(20px);
  background: rgba(7, 7, 8, 0.85);
}
.filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  align-items: center;
}
.filter-label {
  font-size: 0.85rem;
  color: var(--fg-3);
  margin-right: 8px;
}
.filter-tag {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--fg-1);
  transition: all 0.2s;
  background: transparent;
  cursor: pointer;
  font-family: inherit;
}
.filter-tag:hover {
  border-color: var(--gold);
  color: var(--gold-2);
}
.filter-tag.is-active {
  background: var(--gold);
  color: #1a1100;
  border-color: var(--gold);
}
.filter-tag .count {
  margin-left: 4px;
  font-size: 0.75rem;
  opacity: 0.6;
}

/* ========== 文章列表 ========== */
.blog-list { padding: 60px 0 100px; background: var(--bg-1); }

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

.article-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s, border-color 0.3s;
  text-decoration: none;
  color: inherit;
}
.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
}

.article-cover {
  aspect-ratio: 16/9;
  background: var(--bg-3);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.article-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(6, 182, 212, 0.05));
  opacity: 0.6;
}
.article-cover-icon {
  position: relative;
  font-size: 3rem;
  z-index: 1;
}
.article-cover-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--gold);
  color: #1a1100;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  z-index: 1;
}

.article-body {
  padding: 24px 24px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--fg-3);
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.article-meta .cat {
  color: var(--gold-2);
  font-weight: 500;
}
.article-meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--fg-3);
}

.article-card h3 {
  font-size: 1.3rem;
  margin: 0 0 10px;
  font-weight: 700;
  line-height: 1.4;
  transition: color 0.2s;
}
.article-card:hover h3 { color: var(--gold-2); }

.article-excerpt {
  color: var(--fg-2);
  font-size: 0.95rem;
  line-height: 1.65;
  margin: 0 0 16px;
  flex: 1;
}

.article-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
}
.article-read {
  color: var(--fg-3);
}
.article-arrow {
  color: var(--gold-2);
  font-weight: 600;
}

.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--fg-2);
  grid-column: 1 / -1;
}

/* ========== 文章详情页 ========== */
.article-page {
  padding: 60px 0 100px;
  background: var(--bg);
}
.article-layout {
  display: grid;
  grid-template-columns: 240px 1fr 240px;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.article-toc {
  position: sticky;
  top: 100px;
  align-self: start;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}
.article-toc h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-3);
  margin: 0 0 12px;
  font-weight: 600;
}
.article-toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.article-toc li { margin: 6px 0; }
.article-toc a {
  display: block;
  color: var(--fg-2);
  font-size: 0.85rem;
  padding: 4px 0 4px 12px;
  border-left: 2px solid var(--line);
  transition: all 0.2s;
  line-height: 1.5;
}
.article-toc a:hover,
.article-toc a.is-active {
  color: var(--gold-2);
  border-left-color: var(--gold);
}
.article-toc .toc-h3 { padding-left: 24px; font-size: 0.8rem; }

.article-main {
  max-width: 760px;
  margin: 0 auto;
  width: 100%;
}

.article-header {
  margin-bottom: 40px;
}
.article-header .cat {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--gold-2);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.article-header h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  margin: 0 0 16px;
  line-height: 1.25;
  letter-spacing: -0.01em;
}
.article-header .meta {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--fg-3);
  font-size: 0.9rem;
  flex-wrap: wrap;
}
.article-header .meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--fg-3);
}

/* ========== 文章正文 ========== */
.prose {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--fg-1);
}
.prose h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin: 56px 0 20px;
  letter-spacing: -0.01em;
  scroll-margin-top: 100px;
}
.prose h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 36px 0 14px;
  color: var(--fg);
  scroll-margin-top: 100px;
}
.prose p {
  margin: 0 0 18px;
}
.prose a {
  color: var(--gold-2);
  border-bottom: 1px solid currentColor;
  transition: opacity 0.2s;
}
.prose a:hover { opacity: 0.7; }
.prose strong { color: var(--fg); font-weight: 700; }
.prose ul, .prose ol {
  margin: 0 0 20px;
  padding-left: 24px;
}
.prose li {
  margin: 6px 0;
  line-height: 1.75;
}
.prose blockquote {
  margin: 28px 0;
  padding: 16px 24px;
  background: var(--bg-2);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--fg-1);
  font-style: italic;
}
.prose blockquote p { margin: 0; }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-2);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--gold-2);
  border: 1px solid var(--line);
}
.prose pre {
  margin: 24px 0;
  padding: 16px 20px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow-x: auto;
}
.prose pre code {
  background: none;
  border: 0;
  padding: 0;
  color: var(--fg-1);
}
.prose img {
  margin: 28px 0;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}
.prose hr {
  margin: 48px 0;
  border: 0;
  border-top: 1px solid var(--line);
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.95rem;
}
.prose th, .prose td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}
.prose th {
  background: var(--bg-2);
  font-weight: 600;
  color: var(--fg);
}

/* ========== 文章标签 ========== */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 40px 0 32px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}
.article-tag {
  padding: 4px 12px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--fg-2);
  text-decoration: none;
  transition: all 0.2s;
}
.article-tag:hover {
  color: var(--gold-2);
  border-color: var(--gold);
}

/* ========== 上下篇导航 ========== */
.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 32px 0;
}
.article-nav-link {
  display: block;
  padding: 20px 24px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, transform 0.2s;
}
.article-nav-link:hover {
  border-color: var(--gold);
  transform: translateY(-2px);
}
.article-nav-link.is-disabled {
  opacity: 0.4;
  pointer-events: none;
}
.article-nav-link .label {
  font-size: 0.8rem;
  color: var(--fg-3);
  margin-bottom: 6px;
  display: block;
}
.article-nav-link .title {
  color: var(--fg);
  font-weight: 600;
  line-height: 1.4;
}
.article-nav-link.next {
  text-align: right;
}

/* ========== 侧边栏（公众号 / 相关文章） ========== */
.article-side {
  position: sticky;
  top: 100px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.side-card {
  padding: 20px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.side-card h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-3);
  margin: 0 0 14px;
  font-weight: 600;
}
.side-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.side-list a {
  display: block;
  color: var(--fg-1);
  font-size: 0.9rem;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.2s;
}
.side-list a:hover { color: var(--gold-2); }
.side-list .meta {
  font-size: 0.75rem;
  color: var(--fg-3);
  margin-top: 4px;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; gap: 24px; }
  .article-toc,
  .article-side { display: none; }
  .article-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .blog-hero { padding: 110px 0 40px; }
  .article-nav { grid-template-columns: 1fr; }
  .filter-list { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 8px; }
  .filter-tag { white-space: nowrap; }
  .article-header h1 { font-size: 1.6rem; }
  .prose { font-size: 1rem; }
  .prose h2 { font-size: 1.3rem; }
  .prose h3 { font-size: 1.1rem; }
}