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

html {
  overflow-y: scroll;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  line-height: 1.6;
  color: #374151;
  background-color: #ffffff;
  transition: background-color 0.2s ease, color 0.2s ease;
}

body.dark {
  background-color: #000000;
  color: #ffffff;
}

nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: white;
  border-bottom: 1px solid #e5e7eb;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

body.dark nav {
  background-color: #000000;
  border-bottom-color: #374151;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  box-sizing: border-box;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 600;
  text-decoration: none;
  color: inherit;
  transition: color 0.2s ease;
}

.nav-logo:hover {
  color: black;
}

body.dark .nav-logo:hover {
  color: white;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border: none;
  border-radius: 0.375rem;
  background: transparent;
  color: #6b7280;
  cursor: pointer;
  transition: all 0.2s ease;
}

.theme-toggle:hover {
  background-color: #f3f4f6;
}

body.dark .theme-toggle {
  color: #9ca3af;
}

body.dark .theme-toggle:hover {
  background-color: #000000;
}

.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  display: grid;
  grid-template-columns: 200px 1fr 200px;
  gap: 2rem;
}

.main-container.article-detail-mode {
  display: block;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.sidebar-left {
  position: sticky;
  top: 2rem;
}

.sidebar-title {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.category-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}



.category-button {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px dashed #d1d5db;
  color: #6b7280;
  cursor: pointer;
  border-radius: 0.375rem;
  transition: all 0.2s ease;
  font-size: 0.875rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.category-button:hover {
  border-color: #9ca3af;
  color: #111827;
}

.category-button.active {
  border-color: #111827;
  background-color: #111827;
  color: #ffffff;
}

body.dark .category-button {
  border-color: #4b5563;
  color: #9ca3af;
}

body.dark .category-button:hover {
  border-color: #6b7280;
  color: #f9fafb;
}

body.dark .category-button.active {
  border-color: #f9fafb;
  background-color: #f9fafb;
  color: #111827;
}

.main-content {
  padding: 0 1rem;
}

.content-header {
  margin-bottom: 2rem;
}

.content-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.content-subtitle {
  font-size: 0.875rem;
  color: #6b7280;
}

body.dark .content-subtitle {
  color: #9ca3af;
}

.posts-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.post-card {
  display: flex;
  align-items: stretch;
  border: 2px dashed #e5e7eb;
  border-radius: 0.75rem;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s ease;
  height: 140px;
  background: #ffffff;
}

.post-card:hover {
  border-color: #9ca3af;
}

body.dark .post-card {
  border-color: #374151;
  background: #000000;
}

body.dark .post-card:hover {
  border-color: #6b7280;
}

.post-image-container {
  width: 200px;
  height: 100%;
  flex-shrink: 0;
}

.post-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.post-image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

body.dark .post-image-placeholder {
  background: linear-gradient(135deg, #374151 0%, #4b5563 100%);
}

.post-content {
  flex: 1;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.post-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}

.post-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #111827;
  line-height: 1.4;
  margin: 0;
  flex: 1;
  margin-right: 1rem;
}

body.dark .post-title {
  color: #f9fafb;
}

.post-category {
  padding: 0.25rem 0.75rem;
  background-color: #f3f4f6;
  border-radius: 9999px;
  font-size: 0.75rem;
  color: #6b7280;
  white-space: nowrap;
  flex-shrink: 0;
}

body.dark .post-category {
  background-color: #374151;
  color: #9ca3af;
}

.post-description {
  font-size: 0.875rem;
  color: #6b7280;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  min-height: 1.5rem;
  overflow: visible;
}

body.dark .post-description {
  color: #d1d5db;
}

.post-date {
  font-size: 0.75rem;
  color: #9ca3af;
  align-self: flex-end;
  margin-top: auto;
}

body.dark .post-date {
  color: #6b7280;
}

.sidebar-right {
  position: sticky;
  top: 2rem;
}

.profile-card {
  border: 1px dashed #d1d5db;
  border-radius: 0.5rem;
  padding: 1.5rem;
}

body.dark .profile-card {
  border-color: #4b5563;
}

.profile-header {
  text-align: center;
  margin-bottom: 1rem;
}

.profile-avatar {
  width: 4rem;
  height: 4rem;
  background-color: #f3f4f6;
  border-radius: 50%;
  margin: 0 auto 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #9ca3af;
}

body.dark .profile-avatar {
  background-color: #000000;
}

.profile-name {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.profile-bio {
  font-size: 0.875rem;
  color: #6b7280;
}

body.dark .profile-bio {
  color: #9ca3af;
}

.profile-stats {
  border-top: 1px dashed #d1d5db;
  padding-top: 1rem;
  font-size: 0.875rem;
  color: #6b7280;
}

body.dark .profile-stats {
  border-color: #4b5563;
  color: #9ca3af;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.stat-row:last-child {
  margin-bottom: 0;
}

.pagination {
  margin-top: 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.pagination-info {
  font-size: 0.875rem;
  color: #6b7280;
}

body.dark .pagination-info {
  color: #9ca3af;
}

.pagination-btn {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid #d1d5db;
  border-radius: 0.5rem;
  background: white;
  color: #374151;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-left: 0.5rem;
}

.pagination-btn:hover:not(:disabled) {
  background-color: #f9fafb;
}

.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination-current {
  font-size: 0.875rem;
  color: #374151;
  margin: 0 1rem;
  font-weight: 500;
}

body.dark .pagination-current {
  color: #d1d5db;
}

body.dark .pagination-btn {
  background: black;
  color: #d1d5db;
  border-color: #4b5563;
}

body.dark .pagination-btn:hover:not(:disabled) {
  background-color: #000000;
}

@media (max-width: 768px) {
  .main-container {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .content-main {
    border: none;
    padding: 0;
  }
  
  .sidebar-left,
  .sidebar-right {
    position: static;
  }
}

.view-container {
  width: 100%;
}

.article-detail-layout {
  display: flex;
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.article-main {
  flex: 1;
  max-width: calc(100% - 280px);
  min-width: 0;
}


.main-container.article-detail-mode .article-main {
  max-width: calc(100% - 280px);
}

.article-header {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid #e2e8f0;
  text-align: center;
}

body.dark .article-header {
  border-bottom-color: #374151;
}

.back-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: none;
  border: 1px solid #d0d7de;
  border-radius: 0.375rem;
  color: #656d76;
  font-size: 0.875rem;
  font-weight: 400;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.back-button:hover {
  background-color: #f6f8fa;
  border-color: #8c959f;
  color: #24292f;
}

.dark .back-button {
  border-color: #30363d;
  color: #8b949e;
}

.dark .back-button:hover {
  background-color: #21262d;
  border-color: #6e7681;
  color: #e6edf3;
}

.article-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid #e5e7eb;
}

.dark .article-header {
  border-bottom-color: #374151;
}

.article-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 0;
  color: #0f172a;
  text-align: center;
  letter-spacing: -0.025em;
}

.dark .article-title {
  color: #ffffff;
}

.article-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: #64748b;
  margin-top: 0.75rem;
  margin-bottom: 2rem;
  font-weight: 400;
  letter-spacing: 0.025em;
}

.article-dates {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.date-separator {
  color: #cbd5e1;
  font-weight: 400;
}

.dark .article-meta {
  color: #9ca3af;
}

.article-category {
  background-color: #f1f5f9;
  color: #475569;
  padding: 0.125rem 0.5rem;
  border-radius: 0.375rem;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.dark .article-category {
  background-color: #000000;
  color: #ffffff;
}

.article-html-content {
  line-height: 1.7;
  font-size: 1rem;
  color: #374151;
}

.dark .article-html-content {
  color: #e5e7eb;
}

.article-html-content h1,
.article-html-content h2,
.article-html-content h3,
.article-html-content h4,
.article-html-content h5,
.article-html-content h6 {
  margin: 2rem 0 1rem;
  font-weight: 600;
  line-height: 1.3;
  color: #111827;
  scroll-margin-top: 6rem;
}

.dark .article-html-content h1,
.dark .article-html-content h2,
.dark .article-html-content h3,
.dark .article-html-content h4,
.dark .article-html-content h5,
.dark .article-html-content h6 {
  color: #ffffff;
}

.article-html-content h1 { font-size: 1.875rem; }
.article-html-content h2 { font-size: 1.5rem; }
.article-html-content h3 { font-size: 1.25rem; }
.article-html-content h4 { font-size: 1.125rem; }
.article-html-content h5 { font-size: 1rem; }
.article-html-content h6 { font-size: 0.875rem; }

.article-html-content p {
  margin: 1rem 0;
}

.article-html-content ul,
.article-html-content ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.article-html-content li {
  margin: 0.5rem 0;
}

.article-html-content blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  border-left: 4px solid #e5e7eb;
  background-color: #f9fafb;
  font-style: italic;
}

.dark .article-html-content blockquote {
  border-left-color: #4b5563;
  background-color: #000000;
}

/* Twitter风格极简代码块样式 */
.article-html-content pre {
  margin: 1rem 0;
  padding: 0.75rem;
  background-color: #f7f9fa;
  border: 1px solid #e1e8ed;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.5;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
  color: #0f1419;
}

.dark .article-html-content pre {
  background-color: #16181c;
  border-color: #2f3336;
  color: #e7e9ea;
}

/* 行内代码样式 */
.article-html-content code {
  background-color: #f7f9fa;
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-size: 0.85em;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
  color: #0f1419;
  border: 1px solid #e1e8ed;
}

.dark .article-html-content code {
  background-color: #16181c;
  color: #e7e9ea;
  border-color: #2f3336;
}

/* 代码块内的代码不应用行内样式 */
.article-html-content pre code {
  background-color: transparent;
  padding: 0;
  border-radius: 0;
  border: none;
  color: inherit;
}

/* Twitter风格极简语法高亮 */
.article-html-content pre .hljs-comment,
.article-html-content pre .hljs-quote {
  color: #657786;
  font-style: italic;
}

.dark .article-html-content pre .hljs-comment,
.dark .article-html-content pre .hljs-quote {
  color: #71767b;
}

.article-html-content pre .hljs-keyword,
.article-html-content pre .hljs-selector-tag,
.article-html-content pre .hljs-subst {
  color: #0f1419;
  font-weight: 600;
}

.dark .article-html-content pre .hljs-keyword,
.dark .article-html-content pre .hljs-selector-tag,
.dark .article-html-content pre .hljs-subst {
  color: #e7e9ea;
  font-weight: 600;
}

.article-html-content pre .hljs-number,
.article-html-content pre .hljs-literal,
.article-html-content pre .hljs-variable,
.article-html-content pre .hljs-template-variable,
.article-html-content pre .hljs-tag .hljs-attr {
  color: #536471;
}

.dark .article-html-content pre .hljs-number,
.dark .article-html-content pre .hljs-literal,
.dark .article-html-content pre .hljs-variable,
.dark .article-html-content pre .hljs-template-variable,
.dark .article-html-content pre .hljs-tag .hljs-attr {
  color: #8b98a5;
}

.article-html-content pre .hljs-string,
.article-html-content pre .hljs-doctag {
  color: #536471;
}

.dark .article-html-content pre .hljs-string,
.dark .article-html-content pre .hljs-doctag {
  color: #8b98a5;
}

.article-html-content pre .hljs-title,
.article-html-content pre .hljs-section,
.article-html-content pre .hljs-selector-id {
  color: #0f1419;
  font-weight: 600;
}

.dark .article-html-content pre .hljs-title,
.dark .article-html-content pre .hljs-section,
.dark .article-html-content pre .hljs-selector-id {
  color: #e7e9ea;
  font-weight: 600;
}

.article-html-content pre .hljs-type,
.article-html-content pre .hljs-class .hljs-title {
  color: #0f1419;
  font-weight: 600;
}

.dark .article-html-content pre .hljs-type,
.dark .article-html-content pre .hljs-class .hljs-title {
  color: #e7e9ea;
  font-weight: 600;
}

.article-html-content pre .hljs-tag,
.article-html-content pre .hljs-name,
.article-html-content pre .hljs-attribute {
  color: #536471;
  font-weight: normal;
}

.dark .article-html-content pre .hljs-tag,
.dark .article-html-content pre .hljs-name,
.dark .article-html-content pre .hljs-attribute {
  color: #8b98a5;
}

.article-html-content pre .hljs-regexp,
.article-html-content pre .hljs-link {
  color: #536471;
}

.dark .article-html-content pre .hljs-regexp,
.dark .article-html-content pre .hljs-link {
  color: #8b98a5;
}

.article-html-content pre .hljs-symbol,
.article-html-content pre .hljs-bullet {
  color: #657786;
}

.dark .article-html-content pre .hljs-symbol,
.dark .article-html-content pre .hljs-bullet {
  color: #71767b;
}

.article-html-content pre .hljs-built_in,
.article-html-content pre .hljs-builtin-name {
  color: #536471;
}

.dark .article-html-content pre .hljs-built_in,
.dark .article-html-content pre .hljs-builtin-name {
  color: #8b98a5;
}

.article-html-content pre .hljs-meta {
  color: #657786;
}

.dark .article-html-content pre .hljs-meta {
  color: #71767b;
}

.article-html-content pre .hljs-deletion {
  background: rgba(229, 231, 235, 0.3);
}

.dark .article-html-content pre .hljs-deletion {
  background: rgba(47, 51, 54, 0.3);
}

.article-html-content pre .hljs-addition {
  background: rgba(229, 231, 235, 0.3);
}

.dark .article-html-content pre .hljs-addition {
  background: rgba(47, 51, 54, 0.3);
}

.article-html-content pre .hljs-emphasis {
  font-style: italic;
}

.article-html-content pre .hljs-strong {
  font-weight: 600;
}

.article-html-content img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 16px 0;
}

.article-html-content hr {
  height: 0.25em;
  padding: 0;
  margin: 24px 0;
  background-color: var(--border-color);
  border: 0;
}

.table-wrapper {
  overflow-x: auto;
  margin: 1.5rem 0;
}

.article-html-content table {
  border-spacing: 0;
  border-collapse: collapse;
  display: block;
  width: max-content;
  max-width: 100%;
  overflow: auto;
}

.article-html-content table th,
.article-html-content table td {
  padding: 6px 13px;
  border: 1px solid var(--border-color);
}

.article-html-content table th {
  font-weight: 600;
  background-color: var(--bg-secondary);
}

.article-html-content table tr {
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
}

.article-html-content table tr:nth-child(2n) {
  background-color: var(--bg-secondary);
}

.article-toc {
  width: 240px;
  flex-shrink: 0;
  position: sticky;
  top: 2rem;
  height: fit-content;
  max-height: calc(100vh - 4rem);
  overflow-y: auto;
}

.toc-header {
  font-size: 0.875rem;
  font-weight: 600;
  color: #24292f;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #d0d7de;
}

body.dark .toc-header {
  color: #e6edf3;
  border-bottom-color: #30363d;
}

.toc-nav {
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
}

.toc-nav a {
  display: block;
  padding: 0.25rem 0;
  color: #656d76;
  text-decoration: none;
  border-left: 2px solid transparent;
  padding-left: 0.75rem;
  transition: all 0.2s ease;
}

.toc-nav a:hover {
  color: #24292f;
  border-left-color: #d0d7de;
}

.toc-nav a.active {
  color: #0969da;
  border-left-color: #0969da;
  font-weight: 500;
}

body.dark .toc-nav a {
  color: #8b949e;
}

body.dark .toc-nav a:hover {
  color: #e6edf3;
  border-left-color: #30363d;
}

body.dark .toc-nav a.active {
  color: #58a6ff;
  border-left-color: #58a6ff;
}

.toc-nav .toc-h2 {
  padding-left: 0.75rem;
}

.toc-nav .toc-h3 {
  padding-left: 1.5rem;
}

.toc-nav .toc-h4 {
  padding-left: 2.25rem;
}

.toc-nav .toc-h5,
.toc-nav .toc-h6 {
  padding-left: 3rem;
}

/* 移动端响应式样式 */
@media (max-width: 768px) {
  .article-detail {
    flex-direction: column;
    gap: 1rem;
  }
  
  .article-toc {
    width: 100%;
    position: static;
    max-height: none;
    order: -1;
    background-color: #f6f8fa;
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid #d0d7de;
  }
  
  body.dark .article-toc {
    background-color: #161b22;
    border-color: #30363d;
  }
  
  .toc-nav {
    margin-bottom: 1rem;
  }
  
  .back-button {
    margin-top: 0;
  }
  
  .article-view {
    padding: 1rem;
  }
  
  .article-title {
    font-size: 1.75rem;
  }
  
  .article-meta {
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.75rem;
  }
  
  .article-category {
    font-size: 0.6875rem;
  }
}