:root {
  --primary: #0067C0;
  --on-primary: #FFFFFF;
  --primary-container: #D3E5FF;
  --on-primary-container: #001D36;
  --secondary: #535F70;
  --on-secondary: #FFFFFF;
  --secondary-container: #D7E3F7;
  --on-secondary-container: #101C2B;
  --error: #BA1A1A;
  --on-error: #FFFFFF;
  --error-container: #FFDAD6;
  --on-error-container: #410002;
  --surface: #FFFFFF;
  --on-surface: #1A1C1E;
  --surface-variant: #DFE2EB;
  --on-surface-variant: #43474E;
  --background: #F8F9FF;
  --on-background: #1A1C1E;
  --outline: #74777F;
  --outline-variant: #C4C6D0;
  --surface-container-lowest: #FFFFFF;
  --surface-container-low: #F3F5FA;
  --surface-container: #EDEFF5;
  --surface-container-high: #E7E9F0;
  --surface-container-highest: #E2E4EA;
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --elevation-1: 0 1px 2px rgba(0,0,0,0.03), 0 1px 3px 1px rgba(0,0,0,0.05);
  --elevation-3: 0 1px 3px rgba(0,0,0,0.05), 0 4px 8px 3px rgba(0,0,0,0.04);
  --elevation-4: 0 2px 3px rgba(0,0,0,0.05), 0 6px 10px 4px rgba(0,0,0,0.04);
}

[data-theme="dark"] {
  --primary: #A8C8FF;
  --on-primary: #003059;
  --primary-container: #00497E;
  --on-primary-container: #D3E5FF;
  --secondary: #BBC7DB;
  --on-secondary: #253140;
  --secondary-container: #3B4858;
  --on-secondary-container: #D7E3F7;
  --error: #FFB4AB;
  --on-error: #690005;
  --error-container: #93000A;
  --on-error-container: #FFDAD6;
  --surface: #121316;
  --on-surface: #E2E2E5;
  --surface-variant: #43474E;
  --on-surface-variant: #C4C6D0;
  --background: #121316;
  --on-background: #E2E2E5;
  --outline: #8E9199;
  --outline-variant: #43474E;
  --surface-container-lowest: #0A0A0D;
  --surface-container-low: #1A1C1E;
  --surface-container: #1E2023;
  --surface-container-high: #282A2E;
  --surface-container-highest: #333539;
  --elevation-1: 0 1px 2px rgba(0,0,0,0.2), 0 1px 3px 1px rgba(0,0,0,0.15);
  --elevation-3: 0 1px 3px rgba(0,0,0,0.25), 0 4px 8px 3px rgba(0,0,0,0.2);
  --elevation-4: 0 2px 3px rgba(0,0,0,0.25), 0 6px 10px 4px rgba(0,0,0,0.2);
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body {
  background: var(--background);
  color: var(--on-background);
  font-family: 'Roboto','Segoe UI',system-ui,sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  padding-top: 92px;
}

/* 浮动按钮 */
.floating-buttons {
  position: fixed;
  bottom: 24px;
  right: 16px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.floating-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--elevation-3);
  transition: all .3s cubic-bezier(.4,0,.2,1);
  background: var(--surface-container-highest);
  color: var(--on-surface-variant);
}
.floating-btn i { font-size: 22px; }
.floating-btn:hover { box-shadow: var(--elevation-4); }
.theme-toggle .fa-sun { display: block; }
.theme-toggle .fa-moon { display: none; }
[data-theme="dark"] .theme-toggle .fa-sun { display: none; }
[data-theme="dark"] .theme-toggle .fa-moon { display: block; }
.theme-toggle.hidden { opacity: 0; transform: translateY(20px) scale(.8); pointer-events: none; }
.back-to-top { opacity: 0; transform: translateY(20px) scale(.8); pointer-events: none; }
.back-to-top.show { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }

/* 搜索和评论按钮的图标颜色 */
.search-float i { color: var(--primary); }
.scroll-to-discussion i { color: var(--primary); }

/* 容器 */
.container { 
  width: min(100%, 1480px);
  margin: 0 auto; 
  padding: 0 var(--spacing-lg) var(--spacing-lg); 
}

/* 角标 */
.site-badge {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 900;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  box-shadow: var(--elevation-3);
  backdrop-filter: blur(14px);
}
.logo-wrapper { display: flex; justify-content: center; }
.logo-icon {
  width: 40px; height: 40px; border-radius: var(--radius-md);
  background: var(--primary); display: flex; align-items: center; justify-content: center;
}
.logo-icon i { font-size: 20px; color: var(--on-primary); }
.site-badge h1 { font-size: 1rem; line-height: 1.2; font-weight: 600; white-space: nowrap; }
.subtitle { font-size: .78rem; color: var(--on-surface-variant); margin-top: 2px; white-space: nowrap; }

/* 两栏工作台 */
.app-layout {
  display: grid;
  grid-template-columns: minmax(440px, 540px) minmax(0, 1fr);
  grid-template-areas:
    "files stats"
    "files announcement"
    "files discussion"
    "files disclaimer"
    "files footer";
  gap: var(--spacing-lg);
  align-items: start;
}

.file-sidebar {
  grid-area: files;
  position: sticky;
  top: 92px;
  height: calc(100vh - 116px);
  min-height: 520px;
  width: 100%;
}

.stats-bar { grid-area: stats; }
.announcement-card { grid-area: announcement; }
.discussion-card { grid-area: discussion; }
.disclaimer { grid-area: disclaimer; }
.footer { grid-area: footer; }

/* 统计栏 */
.stats-bar {
  display: flex; 
  justify-content: center; 
  gap: var(--spacing-xl);
  padding: var(--spacing-lg); 
  background: var(--surface-container-low);
  border-radius: var(--radius-xl); 
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--elevation-1);
}

.stat-item { text-align: center; }
.stat-value { font-size: 1.5rem; font-weight: 500; color: var(--primary); }
.stat-label { font-size: .8rem; color: var(--on-surface-variant); }

/* 公告 */
.announcement-card {
  background: var(--primary-container); 
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg); 
  margin-bottom: var(--spacing-lg);
}

.announcement-header { 
  display: flex; 
  justify-content: space-between; 
  align-items: center; 
  margin-bottom: var(--spacing-md); 
  flex-wrap: wrap; 
  gap: var(--spacing-sm); 
}
.announcement-title { 
  font-size: 1.2rem; 
  font-weight: 500; 
  color: var(--on-primary-container); 
  display: flex; 
  align-items: center; 
  gap: var(--spacing-sm); 
}
.btn-refresh {
  display: inline-flex; 
  align-items: center; 
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg); 
  border-radius: var(--radius-full);
  border: none; 
  background: var(--primary); 
  color: var(--on-primary);
  font-size: .85rem; 
  font-weight: 500; 
  cursor: pointer;
  box-shadow: var(--elevation-1); 
  transition: all .2s;
}
.btn-refresh:hover { opacity: .9; }
.announcement-content {
  background: rgba(255,255,255,.7); 
  border-radius: var(--radius-md);
  padding: var(--spacing-md); 
  color: var(--on-primary-container); 
  line-height: 1.7;
}
[data-theme="dark"] .announcement-content { background: rgba(0,0,0,.2); }
.announcement-content p { margin-bottom: var(--spacing-sm); }
.announcement-content a { color: var(--primary); font-weight: 500; text-decoration: none; }
.announcement-content code { 
  background: rgba(0,0,0,.08); 
  padding: 2px 8px; 
  border-radius: var(--radius-xs); 
  font-size: .85rem; 
}
.announcement-content blockquote { 
  border-left: 4px solid var(--primary); 
  padding-left: var(--spacing-md); 
  margin: var(--spacing-sm) 0; 
}
.announcement-meta { 
  margin-top: var(--spacing-md); 
  padding-top: var(--spacing-sm); 
  border-top: 1px solid rgba(0,0,0,.12); 
  font-size: .8rem; 
  opacity: .7; 
}

/* 卡片 */
.card {
  background: var(--surface); 
  border-radius: var(--radius-xl); 
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg); 
  box-shadow: var(--elevation-1);
  border: 1px solid var(--outline-variant);
}

.file-card {
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#releases {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding-right: var(--spacing-xs);
}

.discussion-card {
  margin-bottom: var(--spacing-lg);
}

.section-title { 
  font-size: 1.3rem; 
  font-weight: 500; 
  margin-bottom: var(--spacing-lg); 
  display: flex; 
  align-items: center; 
  gap: var(--spacing-sm); 
}
.section-title i { color: var(--primary); }

/* 搜索 */
.search-wrapper { position: relative; margin-bottom: var(--spacing-lg); }
.search-input {
  width: 100%; 
  padding: var(--spacing-md) var(--spacing-lg); 
  padding-right: 48px;
  border: 2px solid var(--outline-variant); 
  border-radius: var(--radius-full);
  background: var(--surface-container-lowest); 
  color: var(--on-surface);
  font-size: .95rem; 
  outline: none; 
  transition: all .2s;
}
.search-input:focus { border-color: var(--primary); }
.search-input::placeholder { color: var(--on-surface-variant); }
.search-icon { 
  position: absolute; 
  right: 16px; 
  top: 50%; 
  transform: translateY(-50%); 
  color: var(--on-surface-variant); 
}
.search-info { 
  display: none; 
  justify-content: space-between; 
  padding: var(--spacing-sm) var(--spacing-md); 
  margin-bottom: var(--spacing-sm); 
  background: var(--surface-container); 
  border-radius: var(--radius-md); 
  font-size: .85rem; 
  color: var(--on-surface-variant); 
}
.search-info.show { display: flex; }
.btn-clear-search { 
  background: none; 
  border: none; 
  color: var(--primary); 
  cursor: pointer; 
  font-size: .85rem; 
}

/* 文件列表 */
.release-item {
  background: var(--surface); 
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg); 
  margin-bottom: var(--spacing-md);
  box-shadow: var(--elevation-1); 
  border: 1px solid var(--outline-variant);
}
.release-header { 
  display: flex; 
  justify-content: space-between; 
  align-items: center; 
  flex-wrap: wrap; 
  gap: var(--spacing-sm); 
}
.release-name { font-size: 1.05rem; font-weight: 500; }
.release-name i { color: var(--primary); }
.release-date { font-size: .8rem; color: var(--on-surface-variant); }
.assets-list { 
  display: none; 
  margin-top: var(--spacing-md); 
  padding-top: var(--spacing-md); 
  border-top: 1px solid var(--outline-variant); 
}
.assets-list.show { display: block; }
.asset-item {
  display: flex; 
  justify-content: space-between; 
  align-items: center;
  padding: var(--spacing-md); 
  margin-bottom: var(--spacing-sm);
  background: var(--surface-container-low); 
  border-radius: var(--radius-md);
  border: 1px solid var(--outline-variant); 
  transition: all .2s; 
  flex-wrap: wrap; 
  gap: var(--spacing-sm);
}
.asset-item:hover { border-color: var(--primary); }
.file-info { flex: 1; min-width: 0; }
.file-name { 
  font-weight: 500; 
  font-size: .95rem; 
  word-break: break-all; 
  display: flex;
  align-items: center;
}
.file-name i { color: var(--primary); margin-right: var(--spacing-sm); }
.file-size { font-size: .8rem; color: var(--on-surface-variant); margin-top: var(--spacing-xs); }
.file-actions { 
  display: flex; 
  align-items: center; 
  gap: var(--spacing-sm); 
  flex-shrink: 0; 
  flex-direction: row;
}
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: .85rem; 
  font-weight: 500; 
  cursor: pointer;
  text-decoration: none; 
  transition: all .2s; 
  white-space: nowrap;
  border: 1px solid var(--outline-variant);
  background: var(--surface-container-low);
  color: var(--primary);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
}
.btn-download:hover { 
  background: var(--primary-container);
  border-color: var(--primary);
  opacity: 1;
}
.btn-download i { margin-right: 2px; }
.btn-toggle-assets {
  display: inline-flex; 
  align-items: center; 
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg); 
  border-radius: var(--radius-full);
  border: 1px solid var(--outline-variant); 
  background: var(--surface-container-low);
  color: var(--primary); 
  font-size: .85rem; 
  font-weight: 500; 
  cursor: pointer;
  margin-top: var(--spacing-sm); 
  transition: all .2s;
}
.btn-toggle-assets:hover { background: var(--primary-container); }
.highlight { 
  background: rgba(0,103,192,.2); 
  border-radius: 2px; 
  padding: 0 2px; 
}
.no-results { 
  text-align: center; 
  padding: var(--spacing-xl); 
  color: var(--on-surface-variant); 
  display: none; 
}
.no-results.show { display: block; }
.no-results i { 
  font-size: 3rem; 
  margin-bottom: var(--spacing-md); 
  color: var(--outline-variant); 
}

/* 底部 */
.disclaimer {
  text-align: center; 
  padding: var(--spacing-lg); 
  background: var(--surface);
  border-radius: var(--radius-xl); 
  color: var(--on-surface-variant); 
  font-size: .85rem;
  margin-top: var(--spacing-lg); 
  border: 1px solid var(--outline-variant);
}
.footer { 
  text-align: center; 
  padding: var(--spacing-lg); 
  color: var(--on-surface-variant); 
  font-size: .85rem; 
}

/* 加载 */
.loading { 
  display: flex; 
  align-items: center; 
  justify-content: center; 
  gap: var(--spacing-md); 
  padding: var(--spacing-xl); 
  color: var(--on-surface-variant); 
}
.spinner {
  width: 24px; 
  height: 24px; 
  border: 3px solid var(--outline-variant);
  border-top-color: var(--primary); 
  border-radius: 50%; 
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Toast */
.toast {
  position: fixed; 
  bottom: 90px; 
  left: 50%; 
  transform: translateX(-50%);
  padding: var(--spacing-md) var(--spacing-lg); 
  border-radius: var(--radius-md);
  background: var(--surface-container-highest); 
  color: var(--on-surface);
  font-size: .9rem; 
  font-weight: 500; 
  box-shadow: var(--elevation-3);
  z-index: 10000; 
  display: flex; 
  align-items: center; 
  gap: var(--spacing-sm);
  animation: slideUp .3s ease-out;
}
.toast-success { border-left: 4px solid #0C7D60; }
.toast-error { border-left: 4px solid var(--error); }
.toast-warning { border-left: 4px solid #E6A817; }
@keyframes slideUp { 
  from { 
    opacity: 0; 
    transform: translateX(-50%) translateY(20px); 
  } 
  to { 
    opacity: 1; 
    transform: translateX(-50%) translateY(0); 
  } 
}

a { text-decoration: none; }
a:hover { text-decoration: none; }

/* Gitalk 主题适配 */
#gitalk-container {
  min-height: 200px;
}

/* 暗色主题下 Gitalk 样式覆盖 */
[data-theme="dark"] .gt-header-textarea {
  background: var(--surface-container-lowest);
  color: var(--on-surface);
  border-color: var(--outline-variant);
}
[data-theme="dark"] .gt-header-textarea:focus {
  border-color: var(--primary);
}
[data-theme="dark"] .gt-comment-content {
  background: var(--surface-container-low);
  color: var(--on-surface);
}
[data-theme="dark"] .gt-comment-body {
  color: var(--on-surface);
}
[data-theme="dark"] .gt-comment-body .email-hidden-toggle a {
  color: var(--primary);
}
[data-theme="dark"] .gt-header-preview {
  background: var(--surface-container-low);
  color: var(--on-surface);
}
[data-theme="dark"] .gt-btn {
  background: var(--surface-container-highest);
  color: var(--on-surface);
  border-color: var(--outline-variant);
}
[data-theme="dark"] .gt-btn:hover {
  background: var(--primary-container);
  border-color: var(--primary);
}
[data-theme="dark"] .gt-btn-preview {
  background: var(--surface-container-highest);
  color: var(--on-surface);
}
[data-theme="dark"] .gt-popup {
  background: var(--surface);
  color: var(--on-surface);
  border-color: var(--outline-variant);
}
[data-theme="dark"] .gt-svg svg {
  fill: var(--on-surface-variant);
}

/* 移动端响应式 */
@media (max-width: 1023px) {
  body { padding-top: 0; }

  .site-badge {
    position: static;
    display: block;
    text-align: center;
    padding: var(--spacing-xxl) 0 var(--spacing-xl);
    background: none;
    border: none;
    border-radius: 0;
    box-shadow: none;
    backdrop-filter: none;
  }

  .logo-wrapper {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-md);
  }

  .logo-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    box-shadow: var(--elevation-3);
  }

  .logo-icon i { font-size: 32px; }
  .site-badge h1 { font-size: 2rem; font-weight: 500; }
  .subtitle { font-size: .9rem; margin-top: var(--spacing-xs); }

  .container {
    max-width: 840px;
    display: block;
  }

  .file-sidebar {
    position: static;
    height: auto;
    min-height: 0;
    width: 100%;
  }

  .file-card {
    height: auto;
    overflow: visible;
  }

  #releases {
    flex: initial;
    overflow-y: visible;
    padding-right: 0;
  }
  
  .card {
    margin-bottom: var(--spacing-lg);
    max-height: none;
    overflow-y: visible;
  }
}

@media (max-width: 640px) {
  .site-badge h1 { font-size: 1.6rem; }
  .logo-icon { width: 52px; height: 52px; }
  .logo-icon i { font-size: 26px; }
  .stats-bar { gap: var(--spacing-md); padding: var(--spacing-md); }
  .stat-value { font-size: 1.2rem; }
  .asset-item { flex-direction: column; align-items: flex-start; }
  .file-actions { 
    flex-direction: row; 
    width: 100%; 
    justify-content: flex-start;
  }
  .btn-download {
    flex: 1;
    justify-content: center;
  }
  .card { padding: var(--spacing-md); }
  .floating-buttons { bottom: 16px; right: 12px; gap: 8px; }
  .floating-btn { width: 42px; height: 42px; }
  .floating-btn i { font-size: 20px; }
}