/* =========================
   Base Reset and Typography
   ========================= */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* 全站最大内容宽度：想再宽只改这里 */
  --page-max: 1000px;
  --page-sidepad: 20px; /* 与导航栏一致的左右内边距 */
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.875rem;
  line-height: 1.6;
  color: #333;
  background-color: #fff;
  padding-top: 50px; /* 给导航栏留空间 */
}

/* =========================
   Navigation Bar
   ========================= */
.navbar {
  background-color: white;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  padding: 8px 0;
}

/* 统一三页导航容器宽度与左右内边距 */
.nav-container {
  max-width: var(--page-max) !important;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-left: var(--page-sidepad) !important;
  padding-right: var(--page-sidepad) !important;
}

/* 全局内容容器样式 - 确保所有页面主内容宽度一致 */
.main-content {
  max-width: var(--page-max) !important;
  margin: 0 auto;
  padding-left: var(--page-sidepad) !important;
  padding-right: var(--page-sidepad) !important;
  width: 100%;
}

/* 移动端适配 - 确保不需要左右滚动 */
@media (max-width: 768px) {
  :root {
    --page-sidepad: 15px; /* 移动端减少内边距 */
  }

  /* 确保表格在移动端不溢出 */
  table {
    display: block;
    overflow-x: hidden;
    width: 100%;
  }
}

.logo a {
  font-size: 1.25rem;
  font-weight: bold;
  color: #333;
  text-decoration: none;
  transition: color 0.2s;
}

.logo a:hover {
  color: #3b82f6;
}

.nav-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links li {
  margin-left: 25px;
}

/* 桌面端统一导航字体为 1rem */
.nav-links a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  font-size: 1rem !important;
  transition: color 0.3s, font-weight 0.3s;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: #3498db;
  font-weight: 600;
}

.menu-toggle {
  display: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: #333;
  transition: color 0.2s;
}

.menu-toggle:hover {
  color: #3b82f6;
}

/* 移动端响应式菜单 */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 50px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 50px);
    background: white;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: left 0.3s;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
  }

  .nav-links.active {
    left: 0;
  }

  .nav-links li {
    margin: 15px 0;
  }

  /* 移动端字体略大更易点按（保持你原先的 1.1rem） */
  .nav-links a {
    font-size: 1.1rem !important;
  }
}

/* =========================
   Publication / Shared Sections
   ========================= */
.section-title {
  text-align: left;
  margin-bottom: 1rem;
  color: #333;
  font-size: 1.5rem;
}

.description {
  color: #64748b;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
  line-height: 1.6;
}

/* 论文条目更紧凑 */
.pub-item {
  transition: background-color 0.2s;
  padding: 0.3rem 0;
  border-bottom: 1px solid #e5e7eb;
}
.pub-item:hover { background-color: #f9fafb; }

.pub-title {
  font-weight: 600;
  color: #1e293b;
  margin: 0.25rem 0;
  font-size: 1rem;
}

.pub-authors {
  margin: 0;
  line-height: 1.6;
  font-size: 0.9rem;
  color: #4b5563;
}

.pub-journal {
  margin: 0.25rem 0;
  font-style: italic;
  font-size: 0.9rem;
  color: #6b7280;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  margin: 0.5rem 0;
  color: #64748b;
}
.pub-links a {
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color 0.2s;
}
.pub-links a:hover {
  color: #3b82f6;
  text-decoration: none;
}
.scrollbar-thin::-webkit-scrollbar {
    width: 6px;
}
.scrollbar-thumb-gray::-webkit-scrollbar-thumb {
    background-color: #718096;
    border-radius: 3px;
}
.news-scroll-container {
    max-height: 300px;
    overflow-y: auto;
    padding: 0.5rem 0;
}
.scroll-indicator {
    position: absolute;
    left: 0;
    bottom: -25px;
}
.news-wrapper {
    position: relative;
    margin-top: 1rem;
}
/* 固定缩略图容器的比例和尺寸 */
.video-thumbnail{
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;   /* 统一 16:9，可改 4/3 或 1/1 */
  background: #000;
  overflow: hidden;
}

/* 兼容旧浏览器：没有 aspect-ratio 时用 padding hack */
.video-thumbnail::before{
  content: "";
  display: block;
  padding-top: 56.25%;    /* 16:9 = 9/16 = 56.25% */
}
.video-thumbnail > *{
  position: absolute;
  inset: 0;
}

/* 确保封面图填满而不变形 */
.video-thumbnail img{
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-thumb {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 4 / 3;   /* 或 16 / 9，看你原始图片比例 */
  object-fit: cover;
  border-radius: 4px;    /* 可选，美化圆角 */
}
.author-self { font-weight: 600; color: #0f172a; }

/* =========================
   Home (Index) Specific
   ========================= */
/* 首页 News 区域统一到 --page-max，并与导航同侧边距 */
.news-section {
  max-width: var(--page-max) !important;
  margin: 1.5rem auto;
  padding-left: var(--page-sidepad) !important;
  padding-right: var(--page-sidepad) !important;
}

/* =========================
   Contact Page
   ========================= */
/* Contact 页面主容器统一到 --page-max，并与导航同侧边距 */
.contact-content {
  max-width: var(--page-max) !important;
  margin: 0 auto;
  padding-left: var(--page-sidepad) !important;
  padding-right: var(--page-sidepad) !important;
  padding-top: 20px;
  padding-bottom: 20px;
}

/* =========================
   Global Container Overrides
   ========================= */
/* 覆盖首页/出版页那些用内联 max-width:*** 的表格容器，让它们与导航同侧边距 */
table[style*="max-width:800px"],
table[style*="max-width: 800px"],
table[style*="max-width:var(--page-max)"] {
  max-width: var(--page-max) !important;
  margin-left: auto !important;
  margin-right: auto !important;
  /* 关键：加同样的左右内边距，避免看起来“偏左/不对齐” */
  padding-left: var(--page-sidepad) !important;
  padding-right: var(--page-sidepad) !important;
}

/* 避免 table 的内部单元格再额外撑偏视觉位置（保持已有内边距即可） */

/* =========================
   Community Page Styles
   ========================= */
.video-card {
  background-color: white;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  transition: all 0.3s ease;
}

.video-card:hover {
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  transform: translateY(-0.25rem);
}

.video-thumbnail {
  position: relative;
  padding-bottom: 56.25%;
  background-color: #f3f4f6;
  overflow: hidden;
}
.video-thumbnail { background: transparent !important; }
.video-thumbnail img { filter: none !important; }
.video-thumbnail::before,
.video-thumbnail::after { content: none !important; display: none !important; }

.faq-item {
  border-bottom: 1px solid #e5e7eb;
}

.faq-item:last-child {
  border-bottom: 0;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  text-align: left;
  padding: 1rem;
  font-weight: 500;
  cursor: pointer;
  outline: none;
}

.faq-answer {
  padding-left: 1rem;
  padding-right: 1rem;
  padding-bottom: 1rem;
  color: #6b7280;
  display: none;
}

.faq-answer.open {
  display: block;
}

/* =========================
   Contact Page Styles
   ========================= */
.contact-card {
  background-color: white;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  padding: 1.5rem;
  transition: all 0.3s ease;
}

.contact-card:hover {
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.contact-icon {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #3b82f6;
}

.social-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #f3f4f6;
  color: #6b7280;
  transition: all 0.3s ease;
}

.social-icon:hover {
  background-color: #3b82f6;
  color: white;
}

/* =========================
   Index Page Styles
   ========================= */
.timeline-container {
  max-width: 600px;
}

.timeline-item {
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.scrollbar-thin {
  scrollbar-width: thin;
}

.scrollbar-thumb-gray {
  scrollbar-color: #9ca3af transparent;
}

.scrollbar-thin::-webkit-scrollbar {
    width: 6px;
}
.scrollbar-thumb-gray::-webkit-scrollbar-thumb {
    background-color: #718096;
    border-radius: 3px;
}
.news-scroll-container {
    max-height: 300px;
    overflow-y: auto;
    padding: 1rem;
    border: 1px solid #e2e8f0;
    border-radius: 0.5rem;
    position: relative;
}
.scroll-indicator-container {
    display: flex;
    justify-content: flex-start;
    align-items: flex-end;
    height: 30px;
}
/* =========================
   Publication Page Styles
   ========================= */
/* 确保页面内容可滚动 */
html, body {
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
}

/* 隐藏 Chrome、Edge、Opera 等 Blink 内核浏览器滚动条 */
html::-webkit-scrollbar,
body::-webkit-scrollbar {
  width: 0;
  height: 0;
}

/* 隐藏 Firefox 滚动条 */
html, body {
  scrollbar-width: none;
}

/* 隐藏 IE/Edge 旧版滚动条 */
html {
  -ms-overflow-style: none;
}

.pub-item {
  transition: background-color 0.2s;
  padding: 0.5rem 0;
  border-bottom: 1px solid #e5e7eb;
}

.pub-item:hover {
  background-color: #f9fafb;
}