:root {
  --bg: #f4f1ea;
  --fg: #2b2b2b;
  --muted: #6b6b6b;
  --card: #ffffff;
  --border: #2b2b2b;
  --accent: #c25e00;
  --transition: 0.3s ease;
  --shadow: 6px 6px 0 rgba(43, 43, 43, 0.15);
}

html[data-theme="dark"] {
  --bg: #121212;
  --fg: #e0e0e0;
  --muted: #999999;
  --card: #1a1a1a;
  --border: #444444;
  --accent: #ff9f43;
  --shadow: 6px 6px 0 rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: "Courier New", Courier, monospace;
  background-color: var(--bg);
  color: var(--fg);
  line-height: 1.7;
  min-height: 100vh;
  transition: background-color var(--transition), color var(--transition);
}

/* 深色/浅色切换按钮 */
#theme-toggle {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 1000;
  background: var(--card);
  color: var(--fg);
  border: 2px solid var(--border);
  padding: 10px 14px;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 3px 3px 0 var(--border);
  transition: transform 0.1s, box-shadow 0.1s, background-color var(--transition), color var(--transition);
}

#theme-toggle:hover {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--border);
}

/* 顶部标题 */
.hero {
  padding: 70px 0 30px;
  border-bottom: 3px solid var(--border);
  background: var(--card);
  transition: background-color var(--transition), border-color var(--transition);
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 10px;
}

.hero h1 {
  font-size: 2.4rem;
  letter-spacing: 1px;
  margin-bottom: 8px;
  color: var(--border);
  text-transform: uppercase;
  transition: color var(--transition);
}

.tagline {
  font-size: 1.1rem;
  color: var(--muted);
  margin-bottom: 22px;
  transition: color var(--transition);
}

.links a {
  display: inline-block;
  margin: 0 12px 0 0;
  padding: 8px 18px;
  border: 2px solid var(--border);
  color: var(--fg);
  text-decoration: none;
  text-transform: uppercase;
  font-weight: bold;
  background: var(--bg);
  box-shadow: 3px 3px 0 var(--border);
  transition: transform 0.1s, box-shadow 0.1s, background-color var(--transition), color var(--transition), border-color var(--transition);
}

.links a:hover {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--border);
}

.links a i {
  margin-right: 8px;
}

/* 页面布局：主内容 + 侧边栏 */
.page-wrapper {
  display: flex;
  gap: 30px;
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 10px;
  align-items: flex-start;
}

.content {
  flex: 1;
  min-width: 0;
}

.card {
  background: var(--card);
  border: 3px solid var(--border);
  margin-bottom: 30px;
  box-shadow: var(--shadow);
  text-align: left;
  width: 100%;
  overflow-wrap: break-word;
  word-wrap: break-word;
  transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.card h2 {
  background: var(--border);
  color: var(--card);
  padding: 10px 18px;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 3px solid var(--border);
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

.card h2 .section-icon {
  margin-right: 10px;
}

.card p,
.card ul,
.card li {
  padding: 18px;
  color: var(--fg);
  transition: color var(--transition);
}

.card ul {
  list-style: none;
  padding-left: 18px;
}

.card li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--muted);
  transition: border-color var(--transition);
}

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

.card li::before {
  content: "> ";
  color: var(--accent);
  transition: color var(--transition);
}

/* 论文引用列表 */
.papers li {
  padding: 14px 0;
  border-bottom: 1px dashed var(--muted);
}

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

.papers li::before {
  content: none;
}

.papers a {
  font-weight: bold;
  transition: color var(--transition), border-color var(--transition), background-color var(--transition);
}

.papers .meta {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 6px;
  font-style: italic;
  transition: color var(--transition);
}

.papers .authors {
  color: var(--fg);
  font-size: 0.95rem;
  margin-bottom: 4px;
  transition: color var(--transition);
}

.papers .authors strong {
  color: var(--accent);
  transition: color var(--transition);
}

/* 笔记列表与正文 */
.notes-list li {
  padding: 12px 0;
  border-bottom: 1px dashed var(--muted);
}

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

.notes-list li::before {
  content: none;
}

.notes-list a {
  font-weight: bold;
}

.notes-list .tags {
  display: block;
  color: var(--accent);
  font-size: 0.85rem;
  margin-top: 4px;
}

.post-meta {
  padding: 0 18px 12px;
  color: var(--muted);
  font-size: 0.95rem;
  font-style: italic;
  transition: color var(--transition);
}

.post-content {
  padding: 0 18px 18px;
}

.post-content h2,
.post-content h3,
.post-content h4 {
  margin: 18px 0 10px;
  color: var(--fg);
  transition: color var(--transition);
}

.post-content p,
.post-content ul,
.post-content ol,
.post-content pre {
  margin-bottom: 14px;
}

.post-content ul,
.post-content ol {
  padding-left: 24px;
}

.post-content li {
  margin-bottom: 6px;
}

.post-content pre {
  background: var(--bg);
  border: 1px dashed var(--border);
  padding: 12px;
  overflow-x: auto;
  transition: background-color var(--transition), border-color var(--transition);
}

.post-content code {
  font-family: "Courier New", Courier, monospace;
  background: var(--bg);
  padding: 2px 5px;
  border: 1px solid var(--border);
  transition: background-color var(--transition), border-color var(--transition);
}

.card p i,
.card li i {
  margin-right: 8px;
  color: var(--accent);
  transition: color var(--transition);
}

/* 教育履历时间线 */
.timeline {
  padding-left: 0;
}

.timeline li {
  position: relative;
  padding: 0 0 16px 24px;
  margin-bottom: 0;
  border-left: 3px solid var(--border);
  border-bottom: none;
  transition: border-color var(--transition);
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 4px;
  width: 10px;
  height: 10px;
  background: var(--accent);
  border: 2px solid var(--border);
  transition: background-color var(--transition), border-color var(--transition);
}

.time {
  display: block;
  font-weight: bold;
  color: var(--accent);
  margin-bottom: 4px;
  transition: color var(--transition);
}

.title {
  display: block;
  color: var(--fg);
  transition: color var(--transition);
}

.advisor {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
  font-style: italic;
  margin-top: 4px;
  transition: color var(--transition);
}

.card a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dotted var(--accent);
  transition: color var(--transition), border-color var(--transition), background-color var(--transition);
}

.card a:hover {
  background: rgba(194, 94, 0, 0.12);
}

html[data-theme="dark"] .card a:hover {
  background: rgba(255, 159, 67, 0.15);
}

/* 侧边栏 */
.sidebar {
  width: 280px;
  flex-shrink: 0;
  position: sticky;
  top: 90px;
}

.sidebar-card {
  background: var(--card);
  border: 3px solid var(--border);
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  overflow-wrap: break-word;
  word-wrap: break-word;
  transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.sidebar-card h3 {
  background: var(--border);
  color: var(--card);
  padding: 10px 14px;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 3px solid var(--border);
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

.sidebar-card h3 i {
  margin-right: 8px;
}

.archive-sub {
  padding: 10px 14px;
  border-bottom: 1px dashed var(--muted);
}

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

.archive-sub h4 {
  color: var(--fg);
  font-size: 0.9rem;
  font-weight: bold;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: color var(--transition);
}

.archive-sub h4 i {
  margin-right: 8px;
  color: var(--accent);
}

.archive-list {
  list-style: none;
  padding: 4px 0 8px;
  margin: 0;
}

.archive-list li {
  padding: 4px 0;
  border-bottom: none;
}

.archive-meta {
  color: var(--muted);
  font-size: 0.8rem;
  margin-left: 6px;
}

.sidebar-card ul {
  list-style: none;
  padding: 10px 14px;
}

.sidebar-card li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--muted);
  transition: border-color var(--transition);
}

.sidebar-card li:last-child {
  border-bottom: none;
}

.sidebar-card a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dotted var(--accent);
  font-weight: bold;
  font-size: 0.95rem;
  transition: color var(--transition), border-color var(--transition), background-color var(--transition);
}

.sidebar-card a:hover {
  background: rgba(194, 94, 0, 0.12);
}

html[data-theme="dark"] .sidebar-card a:hover {
  background: rgba(255, 159, 67, 0.15);
}

.sidebar-card .empty {
  padding: 12px 14px;
  color: var(--muted);
  font-size: 0.9rem;
  font-style: italic;
}

.archive-year {
  padding: 4px 0;
  border-bottom: 1px dashed var(--muted);
}

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

.year-toggle {
  background: none;
  border: none;
  color: var(--fg);
  font-family: inherit;
  font-weight: bold;
  cursor: pointer;
  padding: 4px 0;
  width: 100%;
  text-align: left;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition);
}

.year-toggle i {
  color: var(--accent);
  transition: transform 0.2s, color var(--transition);
}

.year-toggle[aria-expanded="true"] i {
  transform: rotate(90deg);
}

.year-posts {
  display: none;
  padding-left: 18px;
  padding-top: 4px;
}

.year-toggle[aria-expanded="true"] + .year-posts {
  display: block;
}

.data-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.data-list .desc {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.4;
}

.data-list .tags {
  color: var(--accent);
  font-size: 0.8rem;
}

/* 分类基准数据集 */
.bench-scroll {
  overflow-x: auto;
}

.bench-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  border: 2px solid var(--border);
  font-size: 0.85rem;
}

.bench-table th,
.bench-table td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
}

.bench-table td {
  white-space: nowrap;
}

.bench-table th {
  background: var(--bg);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 1px;
}

.bench-actions .bench-btn {
  margin-right: 8px;
}

.bench-actions .bench-btn:last-child {
  margin-right: 0;
}

.bench-btn {
  display: inline-block;
  padding: 6px 12px;
  border: 2px solid var(--border);
  background: var(--card);
  color: var(--fg);
  box-shadow: 3px 3px 0 var(--border);
  text-decoration: none;
  font-size: 0.85rem;
  transition: transform 0.1s, box-shadow 0.1s;
}

.bench-btn:hover {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--border);
  color: var(--accent);
}

.bench-note {
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--muted);
}

/* 页脚 */
footer {
  padding: 30px 20px;
  color: var(--muted);
  border-top: 3px solid var(--border);
  font-size: 0.9rem;
  text-align: left;
  background: var(--card);
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

/* 移动端 */
@media (max-width: 800px) {
  #theme-toggle {
    top: 12px;
    right: 12px;
    padding: 8px 10px;
  }

  .hero {
    padding-top: 60px;
  }

  .hero h1 {
    font-size: 1.9rem;
  }

  .links a {
    display: block;
    margin: 10px 0 0;
    max-width: 220px;
  }

  .page-wrapper {
    flex-direction: column;
    margin: 30px 16px;
    padding: 0;
  }

  .content {
    width: 100%;
  }

  .sidebar {
    width: 100%;
    position: static;
  }
}