/**
 * 文章详情页 - 学术期刊风格排版
 */

:root {
  --article-paper: #fdfcfa;
  --article-page-bg: #eceae4;
  --article-ink: #1c1c1c;
  --article-ink-muted: #4a4a4a;
  --article-rule: #2c2c2c;
  --article-accent: #00695c;
  --article-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, "Times New Roman", serif;
  --article-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --article-column: 44rem;
  --article-sidebar: 15rem;
}

.article-page {
  background: var(--article-page-bg);
  min-height: calc(100vh - var(--header-height));
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, var(--article-sidebar)) minmax(0, 1fr);
  gap: var(--spacing-xl);
  align-items: start;
  max-width: calc(var(--article-column) + var(--article-sidebar) + 5rem);
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-xxl);
}

/* 侧栏：目录与导航 */
.article-sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--spacing-md));
  font-family: var(--article-sans);
  font-size: var(--font-size-sm);
}

.article-breadcrumb {
  margin-bottom: var(--spacing-md);
  color: var(--article-ink-muted);
  line-height: 1.5;
}

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

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

.article-sidebar-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--article-ink-muted);
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-xs);
  border-bottom: 2px solid var(--article-rule);
}

#article-nav,
#article-more-nav {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 0;
  overflow: visible;
}

#article-nav a.article-nav-item,
#article-more-nav a.article-nav-item {
  display: block;
  padding: 0.65rem 0;
  border: none;
  border-bottom: 1px dotted #c8c4bc;
  border-radius: 0;
  background: transparent;
  color: var(--article-ink-muted);
  font-size: 0.8125rem;
  line-height: 1.45;
  white-space: normal;
  overflow: visible;
  text-overflow: unset;
  max-width: none;
  transition: color 0.15s ease;
}

#article-nav a.article-nav-item:hover,
#article-more-nav a.article-nav-item:hover {
  color: var(--article-accent);
  border-color: #c8c4bc;
}

#article-nav a.article-nav-item.active,
#article-more-nav a.article-nav-item.active {
  color: var(--article-ink);
  font-weight: 600;
  background: transparent;
  border-color: #c8c4bc;
  padding-left: 0.5rem;
  border-left: 3px solid var(--article-accent);
}

#article-nav a.article-nav-item.article-nav-more {
  margin-top: var(--spacing-sm);
  font-style: italic;
  color: var(--article-accent);
}

/* 正文纸面 */
.article-sheet {
  background: var(--article-paper);
  box-shadow:
    0 1px 2px rgba(0, 0, 0, 0.06),
    0 8px 24px rgba(0, 0, 0, 0.08);
  border: 1px solid #ddd8cf;
  padding: clamp(1.75rem, 4vw, 3rem) clamp(1.5rem, 5vw, 3.5rem);
}

/* 刊头 / 题头 */
.article-masthead {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  font-family: var(--article-sans);
}

.article-journal-label {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--article-accent);
  margin-bottom: var(--spacing-md);
}

.article-title {
  font-family: var(--article-serif);
  font-size: clamp(1.5rem, 3.5vw, 1.875rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--article-ink);
  margin: 0 0 var(--spacing-md);
  letter-spacing: 0.02em;
}

.article-byline {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.5rem 1.25rem;
  font-size: 0.9375rem;
  color: var(--article-ink-muted);
  margin-bottom: var(--spacing-md);
}

.article-authors {
  font-weight: 500;
}

.article-date {
  font-size: 0.875rem;
  color: var(--article-ink-muted);
}

.article-date::before {
  content: "|";
  margin-right: 1.25rem;
  opacity: 0.4;
}

.article-byline .article-date:first-child::before {
  display: none;
}

.article-rule {
  border: none;
  border-top: 1px solid var(--article-rule);
  margin: 0 auto;
  width: 100%;
  max-width: 12rem;
}

.article-rule--wide {
  max-width: 100%;
  margin-top: var(--spacing-lg);
}

/* 阅览统计 */
.article-meta-bar {
  display: flex;
  justify-content: flex-end;
  font-family: var(--article-sans);
  font-size: 0.75rem;
  color: var(--article-ink-muted);
  padding-bottom: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  border-bottom: 1px solid #e8e4dc;
}

.article-meta-bar strong {
  font-weight: 600;
  color: var(--article-ink);
}

/* 正文排版 */
.article-prose {
  font-family: var(--article-serif);
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--article-ink);
  text-align: justify;
  hyphens: auto;
}

.article-prose > h1:first-child {
  display: none;
}

.article-prose p {
  margin: 0 0 1em;
  text-indent: 2em;
}

.article-prose p:first-of-type {
  text-indent: 0;
}

.article-prose h2 {
  font-family: var(--article-sans);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--article-ink);
  margin: 2.25rem 0 0.875rem;
  padding: 0 0 0.4rem;
  border: none;
  border-bottom: 1px solid var(--article-ink);
  border-left: none;
  letter-spacing: 0.04em;
  text-indent: 0;
}

.article-prose h3 {
  font-family: var(--article-sans);
  font-size: 1rem;
  font-weight: 600;
  margin: 1.75rem 0 0.65rem;
  color: var(--article-ink);
}

.article-prose hr {
  border: none;
  border-top: 1px solid #d4d0c8;
  margin: 2rem 0;
}

.article-prose img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.5rem auto;
}

/* 原文信息 / 引用块 */
.article-citation-panel {
  margin: 0 0 2rem;
  padding: 1rem 1.25rem;
  background: #f5f3ee;
  border: 1px solid #ddd8cf;
  border-left: 3px solid var(--article-accent);
  font-family: var(--article-sans);
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--article-ink-muted);
}

.article-citation-panel blockquote {
  margin: 0;
  padding: 0;
  border: none;
  background: transparent;
  border-radius: 0;
  font-style: normal;
}

.article-citation-panel blockquote + blockquote {
  margin-top: 0.35rem;
}

.article-prose blockquote:not(.article-citation-panel blockquote) {
  margin: 1.25rem 0;
  padding: 0.75rem 1rem;
  border-left: 2px solid #999;
  background: #f9f7f3;
  border-radius: 0;
  font-size: 0.9375rem;
  color: var(--article-ink-muted);
}

.article-prose a {
  color: var(--article-accent);
  font-weight: 500;
  word-break: break-word;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.article-prose a:hover {
  color: var(--color-primary-dark);
}

/* 学术表格 */
.article-prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0 2rem;
  font-family: var(--article-sans);
  font-size: 0.8125rem;
  line-height: 1.5;
  border-top: 2px solid var(--article-ink);
  border-bottom: 2px solid var(--article-ink);
}

.article-prose thead th {
  font-weight: 700;
  text-align: left;
  padding: 0.65rem 0.5rem;
  border-bottom: 1px solid var(--article-ink);
  background: transparent;
  color: var(--article-ink);
  vertical-align: bottom;
}

.article-prose tbody td {
  padding: 0.55rem 0.5rem;
  border: none;
  border-bottom: 1px solid #e0dcd4;
  vertical-align: top;
  color: var(--article-ink-muted);
}

.article-prose tbody tr:last-child td {
  border-bottom: none;
}

.article-prose strong {
  font-weight: 700;
  color: var(--article-ink);
}

.article-loading,
.article-error {
  font-family: var(--article-sans);
  text-align: center;
  color: var(--article-ink-muted);
  padding: 3rem 1rem;
}

@media (max-width: 900px) {
  .article-layout {
    grid-template-columns: 1fr;
    max-width: var(--article-column);
  }

  .article-sidebar {
    position: static;
    order: 2;
    padding-top: var(--spacing-lg);
    border-top: 1px solid #d4d0c8;
  }

  .article-sheet {
    order: 1;
  }

  .article-prose {
    text-align: left;
  }
}

@media print {
  .header,
  .footer,
  .article-sidebar,
  .article-meta-bar {
    display: none;
  }

  .article-page {
    background: #fff;
  }

  .article-sheet {
    box-shadow: none;
    border: none;
    padding: 0;
  }

  .article-prose {
    font-size: 11pt;
  }
}