:root {
  --primary-color: #1e3a5f;
  --accent-color: #e74c3c;
  --text-color: #333;
  --text-light: #666;
  --bg-color: #f8f9fa;
  --white: #ffffff;
  --border-color: #e0e0e0;
  --success-color: #27ae60;
  --danger-color: #e74c3c;
  --warning-color: #f39c12;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 8px rgba(0, 0, 0, 0.15);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  background-color: var(--white);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
}

.site-logo {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
  text-decoration: none;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--text-light);
  text-decoration: none;
  transition: color 0.3s;
  font-size: 0.95rem;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-color);
}

.site-main {
  min-height: calc(100vh - 120px);
  padding: 40px 0;
}

.page-header {
  margin-bottom: 40px;
}

.page-header h1 {
  font-size: 2rem;
  color: var(--primary-color);
  font-weight: 600;
}

.article-list {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.article-card {
  background: var(--white);
  padding: 30px;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s, transform 0.2s;
}

.article-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.article-title {
  font-size: 1.5rem;
  margin-bottom: 15px;
  line-height: 1.3;
}

.article-title a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.3s;
}

.article-title a:hover {
  color: var(--accent-color);
}

.article-meta {
  display: flex;
  gap: 15px;
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 15px;
  flex-wrap: wrap;
}

.article-meta span {
  display: flex;
  align-items: center;
}

.article-summary {
  color: var(--text-light);
  margin-bottom: 20px;
  line-height: 1.7;
}

.article-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

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

.article-full {
  background: var(--white);
  padding: 40px;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
}

.article-header {
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.article-full .article-title {
  font-size: 2rem;
  margin-bottom: 15px;
  color: var(--primary-color);
  line-height: 1.3;
}

.article-content {
  font-size: 1.1rem;
  line-height: 1.8;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6 {
  margin-top: 30px;
  margin-bottom: 15px;
  color: var(--primary-color);
  font-weight: 600;
  line-height: 1.3;
}

.article-content h1 { font-size: 2rem; }
.article-content h2 { font-size: 1.75rem; }
.article-content h3 { font-size: 1.5rem; }
.article-content h4 { font-size: 1.25rem; }
.article-content h5 { font-size: 1.1rem; }
.article-content h6 { font-size: 1rem; }

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

.article-content a {
  color: var(--accent-color);
  text-decoration: none;
  word-break: break-word;
}

.article-content a:hover {
  text-decoration: underline;
}

.article-content ul,
.article-content ol {
  margin-left: 30px;
  margin-bottom: 20px;
}

.article-content li {
  margin-bottom: 10px;
}

.article-content blockquote {
  border-left: 4px solid var(--accent-color);
  padding-left: 20px;
  margin: 20px 0;
  color: var(--text-light);
  font-style: italic;
  background: var(--bg-color);
  padding: 15px 20px;
  border-radius: 0 5px 5px 0;
}

.article-content code {
  background: #f5f5f5;
  padding: 2px 6px;
  border-radius: 3px;
  font-family: 'Courier New', monospace;
  font-size: 0.9em;
  word-break: break-word;
}

.article-content pre {
  background: #f5f5f5;
  padding: 20px;
  border-radius: 5px;
  overflow-x: auto;
  margin-bottom: 20px;
  border: 1px solid var(--border-color);
}

.article-content pre code {
  background: none;
  padding: 0;
  font-size: 0.9em;
}

.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 5px;
  margin: 20px 0;
  display: block;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.95rem;
}

.article-content th,
.article-content td {
  padding: 12px;
  text-align: left;
  border: 1px solid var(--border-color);
}

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

.article-content tr:nth-child(even) {
  background: var(--bg-color);
}

.article-footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.nav-link {
  flex: 1;
  padding: 15px;
  background: var(--bg-color);
  border-radius: 5px;
  text-decoration: none;
  color: var(--text-color);
  transition: background 0.3s;
  display: block;
}

.nav-link:hover {
  background: var(--border-color);
}

.nav-link.prev {
  text-align: left;
}

.nav-link.next {
  text-align: right;
}

.back-link {
  display: inline-block;
  color: var(--primary-color);
  text-decoration: none;
}

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

.archive-list {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.archive-year {
  background: var(--white);
  padding: 20px;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
}

.year-title {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-color);
}

.year-articles {
  list-style: none;
}

.archive-item {
  display: flex;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  gap: 15px;
}

.archive-item:last-child {
  border-bottom: none;
}

.archive-date {
  color: var(--text-light);
  font-size: 0.9rem;
  min-width: 100px;
  white-space: nowrap;
}

.archive-link {
  color: var(--text-color);
  text-decoration: none;
  flex: 1;
  word-break: break-word;
}

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

.about-content {
  background: var(--white);
  padding: 40px;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
}

.about-content h2 {
  color: var(--primary-color);
  margin-bottom: 20px;
}

.about-content h3 {
  color: var(--primary-color);
  margin: 30px 0 15px;
}

.about-content p {
  margin-bottom: 15px;
  color: var(--text-light);
}

.about-content ul {
  margin-left: 30px;
  margin-bottom: 20px;
}

.about-content li {
  margin-bottom: 10px;
  color: var(--text-light);
}

.error-page {
  text-align: center;
  padding: 60px 20px;
}

.error-page h1 {
  font-size: 3rem;
  color: var(--accent-color);
  margin-bottom: 20px;
}

.error-message {
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 30px;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-light);
}

.site-footer {
  background: var(--primary-color);
  color: var(--white);
  padding: 20px 0;
  margin-top: 40px;
}

.site-footer p {
  text-align: center;
}

.admin-page {
  background-color: #f5f7fa;
  min-height: 100vh;
}

.admin-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

.admin-header {
  background: var(--white);
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.admin-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
}

.admin-nav h1 {
  color: var(--primary-color);
  font-size: 1.5rem;
  white-space: nowrap;
}

.admin-nav-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.admin-nav-links a {
  color: var(--text-light);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 4px;
  transition: background 0.3s, color 0.3s;
  font-size: 0.9rem;
}

.admin-nav-links a:hover {
  background: var(--bg-color);
  color: var(--primary-color);
}

.admin-content {
  background: var(--white);
  padding: 30px;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
}

.admin-actions {
  margin-bottom: 30px;
}

.article-list-admin {
  margin-top: 20px;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.admin-table th,
.admin-table td {
  padding: 15px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.admin-table th {
  background: var(--bg-color);
  color: var(--primary-color);
  font-weight: 600;
}

.admin-table tr:hover {
  background: var(--bg-color);
}

.admin-table a {
  color: var(--primary-color);
  text-decoration: none;
  word-break: break-word;
}

.admin-table a:hover {
  color: var(--accent-color);
}

.status-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 500;
}

.status-published {
  background: #d4edda;
  color: #155724;
}

.status-draft {
  background: #fff3cd;
  color: #856404;
}

.delete-form {
  display: inline-block;
}

.login-box {
  max-width: 400px;
  margin: 0 auto;
  padding: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-color);
  font-weight: 500;
  font-size: 0.95rem;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 5px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

.form-group textarea {
  min-height: 300px;
  resize: vertical;
  font-family: 'Courier New', monospace;
  line-height: 1.6;
}

.form-group small {
  display: block;
  margin-top: 5px;
  color: var(--text-light);
  font-size: 0.85rem;
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  border: none;
  border-radius: 5px;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: background 0.3s, transform 0.1s, box-shadow 0.3s;
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--primary-color);
  color: var(--white);
}

.btn-primary:hover {
  background: #2c5282;
}

.btn-secondary {
  background: var(--text-light);
  color: var(--white);
}

.btn-secondary:hover {
  background: #4a5568;
}

.btn-danger {
  background: var(--danger-color);
  color: var(--white);
}

.btn-danger:hover {
  background: #c0392b;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.85rem;
}

.login-hint {
  text-align: center;
  color: var(--text-light);
  font-size: 0.9rem;
  margin-top: 20px;
}

.editor-container {
  margin-bottom: 30px;
}

.preview-container {
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
}

.preview-container h3 {
  color: var(--primary-color);
  margin-bottom: 20px;
}

.markdown-preview {
  background: var(--bg-color);
  padding: 20px;
  border-radius: 5px;
  min-height: 200px;
}

.markdown-body {
  line-height: 1.8;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  margin-top: 20px;
  margin-bottom: 10px;
  color: var(--primary-color);
}

.markdown-body h1 { font-size: 2rem; }
.markdown-body h2 { font-size: 1.75rem; }
.markdown-body h3 { font-size: 1.5rem; }
.markdown-body h4 { font-size: 1.25rem; }

.markdown-body p {
  margin-bottom: 15px;
}

.markdown-body a {
  color: var(--accent-color);
  text-decoration: none;
  word-break: break-word;
}

.markdown-body a:hover {
  text-decoration: underline;
}

.markdown-body ul,
.markdown-body ol {
  margin-left: 30px;
  margin-bottom: 15px;
}

.markdown-body li {
  margin-bottom: 8px;
}

.markdown-body blockquote {
  border-left: 4px solid var(--accent-color);
  padding-left: 20px;
  margin: 15px 0;
  color: var(--text-light);
  font-style: italic;
  background: var(--bg-color);
  padding: 15px 20px;
  border-radius: 0 5px 5px 0;
}

.markdown-body code {
  background: #f5f5f5;
  padding: 2px 6px;
  border-radius: 3px;
  font-family: 'Courier New', monospace;
  font-size: 0.9em;
  word-break: break-word;
}

.markdown-body pre {
  background: #f5f5f5;
  padding: 15px;
  border-radius: 5px;
  overflow-x: auto;
  margin-bottom: 15px;
  border: 1px solid var(--border-color);
}

.markdown-body pre code {
  background: none;
  padding: 0;
  font-size: 0.9em;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 15px 0;
  font-size: 0.95rem;
}

.markdown-body th,
.markdown-body td {
  padding: 10px;
  text-align: left;
  border: 1px solid var(--border-color);
}

.markdown-body th {
  background: var(--bg-color);
  font-weight: 600;
}

.markdown-body tr:nth-child(even) {
  background: var(--bg-color);
}

.article-meta-info {
  background: var(--bg-color);
  padding: 20px;
  border-radius: 5px;
  margin-bottom: 30px;
}

.article-meta-info p {
  margin-bottom: 10px;
  color: var(--text-light);
}

.article-meta-info strong {
  color: var(--text-color);
}

.article-content-preview {
  margin-bottom: 30px;
}

.article-content-preview h2 {
  color: var(--primary-color);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.article-actions {
  display: flex;
  gap: 10px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
}

.settings-container {
  max-width: 600px;
  margin: 0 auto;
}

.settings-container h2 {
  color: var(--primary-color);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.error-message {
  background: #fee;
  color: #c33;
  padding: 12px 16px;
  border-radius: 5px;
  margin-bottom: 20px;
  border: 1px solid #fcc;
}

@media (max-width: 1024px) {
  .admin-table {
    font-size: 0.9rem;
  }
  
  .admin-table th,
  .admin-table td {
    padding: 10px;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }
  
  .container {
    padding: 0 15px;
  }
  
  .site-nav {
    flex-direction: column;
    height: auto;
    padding: 15px 0;
    gap: 15px;
  }
  
  .site-logo {
    font-size: 1.3rem;
  }
  
  .nav-links {
    justify-content: center;
    gap: 15px;
  }
  
  .nav-links a {
    font-size: 0.9rem;
    padding: 5px 10px;
  }
  
  .site-main {
    padding: 30px 0;
  }
  
  .page-header h1 {
    font-size: 1.75rem;
  }
  
  .article-card {
    padding: 20px;
  }
  
  .article-title {
    font-size: 1.3rem;
  }
  
  .article-meta {
    font-size: 0.85rem;
    gap: 10px;
  }
  
  .article-full {
    padding: 20px;
  }
  
  .article-full .article-title {
    font-size: 1.75rem;
  }
  
  .article-content {
    font-size: 1rem;
  }
  
  .article-content h1 { font-size: 1.75rem; }
  .article-content h2 { font-size: 1.5rem; }
  .article-content h3 { font-size: 1.3rem; }
  .article-content h4 { font-size: 1.15rem; }
  
  .article-content ul,
  .article-content ol {
    margin-left: 20px;
  }
  
  .article-content blockquote {
    padding: 12px 15px;
  }
  
  .article-content pre {
    padding: 15px;
    font-size: 0.85rem;
  }
  
  .article-content table {
    font-size: 0.85rem;
  }
  
  .article-content th,
  .article-content td {
    padding: 8px;
  }
  
  .article-nav {
    flex-direction: column;
  }
  
  .archive-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  
  .archive-date {
    min-width: auto;
  }
  
  .about-content {
    padding: 20px;
  }
  
  .error-page h1 {
    font-size: 2.5rem;
  }
  
  .admin-container {
    padding: 15px;
  }
  
  .admin-header {
    padding: 15px;
  }
  
  .admin-nav {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .admin-nav h1 {
    font-size: 1.3rem;
  }
  
  .admin-nav-links {
    width: 100%;
    justify-content: flex-start;
  }
  
  .admin-content {
    padding: 20px;
  }
  
  .admin-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  .admin-table thead {
    display: table-header-group;
  }
  
  .admin-table tbody {
    display: table-row-group;
  }
  
  .admin-table tr {
    display: table-row;
  }
  
  .admin-table th,
  .admin-table td {
    white-space: nowrap;
  }
  
  .article-actions {
    flex-direction: column;
  }
  
  .article-actions .btn {
    width: 100%;
  }
  
  .login-box {
    padding: 25px 20px;
    max-width: 100%;
  }
  
  .form-group textarea {
    min-height: 250px;
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .form-actions .btn {
    width: 100%;
  }
  
  .btn {
    padding: 12px 20px;
  }
  
  .preview-container {
    margin-top: 30px;
    padding-top: 20px;
  }
  
  .settings-container {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: 0 12px;
  }
  
  .site-logo {
    font-size: 1.2rem;
  }
  
  .nav-links {
    gap: 10px;
  }
  
  .nav-links a {
    font-size: 0.85rem;
    padding: 5px 8px;
  }
  
  .page-header h1 {
    font-size: 1.5rem;
  }
  
  .article-card {
    padding: 15px;
  }
  
  .article-title {
    font-size: 1.2rem;
  }
  
  .article-full {
    padding: 15px;
  }
  
  .article-full .article-title {
    font-size: 1.5rem;
  }
  
  .article-content h1 { font-size: 1.5rem; }
  .article-content h2 { font-size: 1.3rem; }
  .article-content h3 { font-size: 1.15rem; }
  .article-content h4 { font-size: 1rem; }
  
  .article-content pre {
    padding: 12px;
    font-size: 0.8rem;
  }
  
  .article-content th,
  .article-content td {
    padding: 6px;
    font-size: 0.8rem;
  }
  
  .archive-year {
    padding: 15px;
  }
  
  .year-title {
    font-size: 1.3rem;
  }
  
  .about-content {
    padding: 15px;
  }
  
  .error-page {
    padding: 40px 15px;
  }
  
  .error-page h1 {
    font-size: 2rem;
  }
  
  .error-message {
    font-size: 1rem;
  }
  
  .admin-header {
    padding: 12px;
  }
  
  .admin-content {
    padding: 15px;
  }
  
  .admin-table {
    font-size: 0.8rem;
  }
  
  .admin-table th,
  .admin-table td {
    padding: 8px 6px;
  }
  
  .login-box {
    padding: 20px 15px;
  }
  
  .form-group input[type="text"],
  .form-group input[type="password"],
  .form-group textarea,
  .form-group select {
    padding: 10px;
  }
  
  .form-group textarea {
    min-height: 200px;
  }
  
  .btn {
    padding: 10px 16px;
    font-size: 0.95rem;
  }
  
  .btn-sm {
    padding: 5px 10px;
    font-size: 0.8rem;
  }
}

@media (min-width: 1400px) {
  .container {
    max-width: 900px;
  }
  
  .article-full {
    padding: 50px;
  }
  
  .admin-container {
    max-width: 1400px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --text-color: #e0e0e0;
    --text-light: #a0a0a0;
    --bg-color: #1a1a1a;
    --white: #2d2d2d;
    --border-color: #404040;
  }
  
  .site-header {
    border-bottom-color: var(--border-color);
  }
  
  .article-card,
  .article-full,
  .archive-year,
  .about-content,
  .admin-header,
  .admin-content {
    background: var(--white);
  }
  
  .article-content blockquote,
  .markdown-body blockquote {
    background: var(--bg-color);
  }
  
  .article-content code,
  .markdown-body code {
    background: #3d3d3d;
  }
  
  .article-content pre,
  .markdown-body pre {
    background: #3d3d3d;
    border-color: var(--border-color);
  }
  
  .article-content table,
  .markdown-body table {
    border-color: var(--border-color);
  }
  
  .article-content th,
  .article-content td,
  .markdown-body th,
  .markdown-body td {
    border-color: var(--border-color);
  }
  
  .article-content th,
  .markdown-body th {
    background: var(--bg-color);
  }
  
  .article-content tr:nth-child(even),
  .markdown-body tr:nth-child(even) {
    background: var(--bg-color);
  }
  
  .form-group input[type="text"],
  .form-group input[type="password"],
  .form-group textarea,
  .form-group select {
    background: var(--bg-color);
    border-color: var(--border-color);
    color: var(--text-color);
  }
  
  .form-group input:focus,
  .form-group textarea:focus,
  .form-group select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.2);
  }
  
  .markdown-preview {
    background: var(--bg-color);
  }
  
  .status-published {
    background: #1e4620;
    color: #90ee90;
  }
  
  .status-draft {
    background: #4a3d1b;
    color: #ffd700;
  }
}