/* 邮票 - 周刊风格样式 */
:root {
  --accent-color: #4caf50;
  --accent-light: #e8f5e9;
  --text-primary: #333;
  --text-secondary: #666;
  --text-muted: #999;
  --bg-primary: #fff;
  --bg-secondary: #f8f9fa;
  --border-color: #e0e0e0;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --radius: 8px;
  --max-width: 680px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-secondary);
}

a {
  color: var(--accent-color);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

/* Header */
.header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 20px;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.logo span {
  color: var(--accent-color);
}

.header-meta {
  font-size: 13px;
  color: var(--text-muted);
}

/* Main Container */
.main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 20px;
}

/* Newsletter Header */
.newsletter-header {
  text-align: center;
  padding: 32px 0;
  border-bottom: 2px solid var(--accent-color);
  margin-bottom: 32px;
}

.issue-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}

.issue-date {
  font-size: 14px;
  color: var(--text-secondary);
}

.greeting {
  font-size: 16px;
  color: var(--text-secondary);
  margin-top: 16px;
}

/* In This Issue */
.toc-box {
  background: var(--accent-light);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 32px;
}

.toc-title {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
  color: var(--accent-color);
}

.toc-list {
  list-style: none;
}

.toc-list li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--border-color);
}

.toc-list li:last-child {
  border-bottom: none;
}

.toc-list a {
  color: var(--text-primary);
  font-weight: 500;
}

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

/* Featured Story */
.featured-story {
  background: var(--bg-primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 32px;
}

.featured-image {
  width: 100%;
  height: 280px;
  object-fit: cover;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.featured-content {
  padding: 24px;
}

.featured-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-color);
  margin-bottom: 8px;
}

.featured-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
}

.featured-summary {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Story List */
.story-list {
  margin-bottom: 32px;
}

.section-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-color);
}

.story-item {
  background: var(--bg-primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 16px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.story-thumb {
  width: 100px;
  height: 75px;
  border-radius: 4px;
  object-fit: cover;
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  flex-shrink: 0;
}

.story-content {
  flex: 1;
}

.story-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  line-height: 1.4;
}

.story-title a {
  color: var(--text-primary);
}

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

.story-meta {
  font-size: 13px;
  color: var(--text-muted);
}

/* Sidebar Section */
.sidebar-section {
  margin-bottom: 32px;
}

.sidebar-title {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.article-links {
  list-style: none;
}

.article-links li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.article-links li:last-child {
  border-bottom: none;
}

.article-links a {
  color: var(--text-primary);
  font-size: 14px;
  display: block;
}

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

/* Three Column Layout */
.three-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.column {
  background: var(--bg-primary);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.column-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
  color: var(--accent-color);
}

/* Breadcrumb */
.breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

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

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

.breadcrumb span {
  margin: 0 8px;
}

/* Category Header */
.category-header {
  text-align: center;
  padding: 32px 0;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border-color);
}

.category-title {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 8px;
}

.category-desc {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.category-stats {
  font-size: 13px;
  color: var(--text-muted);
}

/* Issue List */
.issue-list {
  margin-bottom: 32px;
}

.issue-item {
  background: var(--bg-primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 16px;
}

.issue-date-large {
  font-size: 13px;
  color: var(--accent-color);
  font-weight: 600;
  margin-bottom: 8px;
}

.issue-title-large {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.issue-title-large a {
  color: var(--text-primary);
}

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

.issue-summary {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 32px 0;
}

.pagination a,
.pagination span {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 4px;
  font-size: 14px;
}

.pagination a {
  background: var(--bg-primary);
  color: var(--text-primary);
  box-shadow: var(--shadow);
}

.pagination a:hover {
  background: var(--accent-color);
  color: #fff;
  text-decoration: none;
}

.pagination .current {
  background: var(--accent-color);
  color: #fff;
}

.pagination .disabled {
  color: var(--text-muted);
  cursor: not-allowed;
}

/* Article Page */
.article-header {
  text-align: center;
  padding: 32px 0;
  margin-bottom: 32px;
}

.article-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 16px;
}

.article-meta {
  font-size: 14px;
  color: var(--text-secondary);
}

.article-meta span {
  margin: 0 8px;
}

.article-image {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 32px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.article-content {
  background: var(--bg-primary);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  margin-bottom: 32px;
}

.article-content p {
  margin-bottom: 20px;
  font-size: 16px;
  line-height: 1.8;
}

.article-content h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 32px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.article-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 24px 0 12px;
}

.article-content ul,
.article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

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

/* Quick Links Box */
.quick-links {
  background: var(--accent-light);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 32px;
}

.quick-links-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--accent-color);
}

.quick-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.quick-links li {
  padding: 6px 0;
}

.quick-links a {
  color: var(--text-primary);
}

/* 404 Page */
.error-page {
  text-align: center;
  padding: 64px 20px;
}

.error-code {
  font-size: 120px;
  font-weight: 700;
  color: var(--accent-color);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 12px;
}

.error-message {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.error-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent-color);
  color: #fff;
}

.btn-primary:hover {
  background: #43a047;
  text-decoration: none;
}

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  box-shadow: var(--shadow);
}

.btn-secondary:hover {
  background: var(--border-color);
  text-decoration: none;
}

/* Footer */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 32px 20px;
  text-align: center;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.subscribe-box {
  background: var(--accent-light);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}

.subscribe-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.subscribe-text {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.subscribe-form {
  display: flex;
  gap: 8px;
  max-width: 400px;
  margin: 0 auto;
}

.subscribe-input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 14px;
}

.subscribe-btn {
  padding: 12px 20px;
  background: var(--accent-color);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}

.subscribe-btn:hover {
  background: #43a047;
}

.footer-links {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-links a {
  color: var(--text-secondary);
  margin: 0 12px;
}

.footer-links a:hover {
  color: var(--accent-color);
}

.copyright {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 16px;
}

/* Responsive */
@media (max-width: 768px) {
  .three-columns {
    grid-template-columns: 1fr;
  }

  .story-item {
    flex-direction: column;
  }

  .story-thumb {
    width: 100%;
    height: 160px;
  }

  .issue-title {
    font-size: 22px;
  }

  .featured-title {
    font-size: 18px;
  }

  .article-title {
    font-size: 22px;
  }

  .error-code {
    font-size: 80px;
  }

  .subscribe-form {
    flex-direction: column;
  }

  .article-content {
    padding: 20px;
  }
}