:root {
  --bg-color: #fafafa;
  --text-color: #333;
  --border-color: #ddd;
  --accent-color: #555;
  --hover-color: #f0f0f0;
  --card-bg: white;
}

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

body {
  font-family: 'Helvetica Neue', Arial, 'Microsoft YaHei', sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  line-height: 1.7;
  padding: 20px 0;
}

/* 主页标签样式 */
.tagline {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 25px;
}

.tagline span {
    background: #f0f0f0;
    color: #555;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid #e0e0e0;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

.header {
  text-align: center;
  margin-bottom: 50px;
  padding: 20px 0;
}

.header h1 {
  font-size: 2.5rem;
  color: var(--accent-color);
  margin-bottom: 10px;
}

.subtitle {
  font-size: 1.1rem;
  color: #666;
}

.intro {
  margin-bottom: 60px;
}

.intro h2 {
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: var(--accent-color);
}

.projects h2 {
  font-size: 1.8rem;
  margin-bottom: 30px;
  color: var(--accent-color);
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr; /* ← 关键：强制每行只显示一列 */
  gap: 30px;
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 30px;
  transition: all 0.3s ease;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  background: var(--hover-color);
}

.project-card h3 {
  font-size: 1.4rem;
  margin-bottom: 15px;
  color: var(--accent-color);
}

.project-card p {
  margin-bottom: 20px;
  color: #555;
}

.btn {
  display: inline-block;
  background: var(--accent-color);
  color: white;
  padding: 10px 24px;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  transition: opacity 0.3s;
}

.btn:hover {
  opacity: 0.9;
}

/* 项目详情页样式 */
.project-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--border-color);
}

.back-link {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 500;
}

.back-link:hover {
  text-decoration: underline;
}

.project-header h1 {
  font-size: 2.2rem;
  color: var(--accent-color);
  margin: 0;
}

.section {
  margin-bottom: 50px;
}

.section h2 {
  font-size: 1.6rem;
  color: var(--accent-color);
  margin-bottom: 20px;
  padding-left: 10px;
  border-left: 4px solid var(--accent-color);
}

.section p, .section ul, .section table {
  margin-bottom: 20px;
}

.section ul {
  padding-left: 20px;
}

.section table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.section th,
.section td {
  padding: 12px 15px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.section th {
  background-color: #f8f8f8;
  font-weight: 600;
}

blockquote {
  background: #f9f9f9;
  border-left: 4px solid var(--accent-color);
  padding: 15px 20px;
  margin: 20px 0;
  font-style: italic;
}

.huggingface-link {
  display: inline-block;
  background: #FFD21E;
  color: #000;
  padding: 12px 24px;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  margin-top: 10px;
  transition: transform 0.2s;
}

.huggingface-link:hover {
  transform: scale(1.03);
}

.footer {
  margin-top: 80px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: #777;
  font-size: 0.9rem;
}

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

.footer a:hover {
  text-decoration: underline;
}

/* ========= 滑动卡片样式（首页项目轮播） ========= */
.proj-slider { position: relative; }
.proj-viewport { overflow:hidden; border:1px solid var(--border-color); border-radius:14px; background:var(--card-bg); }
.proj-track { display:flex; transition:transform .5s cubic-bezier(.4,.1,.2,1); width:100%; }
.proj-slide { flex:0 0 100%; padding:34px 36px 48px; }
.proj-slide:not(:last-child){ border-right:0; }

.proj-controls { display:flex; align-items:center; gap:12px; margin:18px 6px 10px; flex-wrap:wrap; }
.proj-controls button { background:var(--accent-color); color:#fff; border:none; padding:8px 16px; border-radius:6px; cursor:pointer; font-weight:500; transition:background .25s, opacity .25s; }
.proj-controls button[disabled]{ opacity:.35; cursor:not-allowed; }
.proj-controls button:hover:not([disabled]){ background:#000; }
.proj-counter { font-size:.85rem; color:#555; min-width:64px; text-align:center; }

.proj-dots { display:flex; gap:6px; flex-wrap:wrap; margin-top:4px; }
.proj-dots button { width:12px; height:12px; border-radius:50%; border:1px solid var(--accent-color); background:transparent; cursor:pointer; padding:0; transition:background .3s, transform .3s; }
.proj-dots button.active { background:var(--accent-color); transform:scale(1.15); }
.proj-dots button:hover { background:var(--accent-color); }

/* 片段内部卡片 */
.proj-card h3 { font-size:1.5rem; margin-bottom:8px; color:var(--accent-color); }
.proj-card .lead { margin-bottom:16px; font-weight:500; color:#444; }
.mini-btn { display:inline-block; background:var(--accent-color); color:#fff; text-decoration:none; padding:6px 14px; border-radius:4px; font-size:.8rem; margin-top:4px; }
.mini-btn:hover { background:#000; }

/* details 折叠样式 */
details { border:1px solid var(--border-color); border-radius:8px; padding:10px 14px 12px; background:#fff; margin-bottom:14px; position:relative; }
details[open]{ box-shadow:0 2px 6px rgba(0,0,0,.05); }
details summary { cursor:pointer; font-weight:600; list-style:none; }
details summary::-webkit-details-marker{ display:none; }
details summary::after { content:'+'; position:absolute; right:16px; top:12px; font-weight:400; }
details[open] summary::after { content:'−'; }

/* 修正 details 中列表项目(li) 看起来“跑出”边框的问题：
   1. 统一内边距与列表位置
   2. 让圆点位于容器内部（inside）
   3. 防止长英文/代码溢出（换行） */
details ul, details ol { 
  list-style-position: inside; 
  padding-left: 0; 
  margin: 6px 0 4px; 
}
details li { 
  margin: 2px 0; 
  line-height: 1.5; 
  word-break: break-word; 
  /* 对非常长的连续字符串进一步安全换行 */
  overflow-wrap: anywhere; 
}

@media (max-width: 680px){
  .proj-slide { padding:26px 22px 44px; }
  .proj-card h3 { font-size:1.3rem; }
  .proj-controls { gap:8px; }
}

/* file:// 回退模式 */
.proj-fallback-list { padding:26px 24px 34px; background:var(--card-bg); border:1px solid var(--border-color); border-radius:14px; }
.proj-fallback-list code { background:#eee; padding:2px 5px; border-radius:4px; }
.proj-fallback-list a { color:var(--accent-color); text-decoration:none; }
.proj-fallback-list a:hover { text-decoration:underline; }

/* 响应式设计 */
@media (max-width: 768px) {
  .project-grid {
    grid-template-columns: 1fr;
  }

  .header h1 {
    font-size: 2rem;
  }

  .project-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}