:root {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-tertiary: #94a3b8;
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-success: #10b981;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  padding: 24px;
  font-size: 14px;
}

.container {
  max-width: 1600px;
  margin: 0 auto;
}

/* Header */
header {
  margin-bottom: 32px;
  text-align: center;
  padding: 32px 0;
  position: relative;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  margin-bottom: 12px;
}

header h1 {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.github-link {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  transition: all 0.2s;
}

.github-link:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

.subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 500;
}

.models {
  font-size: 13px;
  color: var(--text-tertiary);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Filters */
.filters {
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

#searchInput {
  padding: 10px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 14px;
  min-width: 200px;
  background: var(--bg-secondary);
  color: var(--text-primary);
}

#searchInput:focus {
  outline: none;
  border-color: var(--accent-primary);
}

#yearFilter {
  padding: 10px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 14px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
}

#resetBtn {
  padding: 10px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 14px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s;
}

#resetBtn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.06);
}

#sortBtn {
  padding: 10px 16px;
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-md);
  font-size: 14px;
  background: var(--accent-primary);
  color: #fff;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s;
}

#sortBtn:hover {
  background: var(--accent-secondary);
  border-color: var(--accent-secondary);
}

.vendor-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.vendor-filters label {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}

.vendor-filters label:hover {
  border-color: var(--accent-primary);
}

.vendor-filters input {
  cursor: pointer;
}

.vendor-filters input:checked + span {
  color: var(--accent-primary);
  font-weight: 500;
}

/* Table Hints */
.table-hints {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  padding: 0 4px;
  font-size: 12px;
  color: var(--text-tertiary);
}

/* Table */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  box-shadow: var(--shadow-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 1400px;
}

th, td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  font-size: 13px;
  vertical-align: top;
}

th {
  background: var(--bg-tertiary);
  font-weight: 600;
  color: var(--text-secondary);
  position: sticky;
  top: 0;
  z-index: 2;
  white-space: nowrap;
}

/* 第一列月份固定 */
th:first-child,
td:first-child {
  position: sticky;
  left: 0;
  background: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-primary);
  z-index: 3;
  min-width: 70px;
  white-space: nowrap;
}

th:first-child {
  background: var(--bg-tertiary);
  z-index: 4;
}

tbody tr:hover td {
  background: var(--bg-tertiary);
}

tbody tr:hover td:first-child {
  background: #e2e8f0;
}

/* 空单元格淡化 */
td:empty::after {
  content: '—';
  color: var(--border-color);
}

/* 模型链接 */
.model-link {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 500;
}

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

/* 单元格内的多个模型 */
.model-item {
  display: block;
  margin-bottom: 4px;
  line-height: 1.5;
}

.model-item:last-child {
  margin-bottom: 0;
}

/* Footer */
.footer {
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-tertiary);
  flex-wrap: wrap;
  gap: 8px;
}

/* Friend Links */
.friend-links {
  margin-top: 32px;
  padding: 16px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border-light);
}

.friend-links-label {
  margin-right: 12px;
  color: var(--text-secondary);
  font-weight: 500;
}

.friend-links a {
  color: var(--accent-primary);
  text-decoration: none;
  margin: 0 10px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.friend-links a:hover {
  text-decoration: underline;
  background: rgba(99, 102, 241, 0.06);
}

/* Changelog */
.changelog {
  margin-top: 32px;
  padding: 24px;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.changelog h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

.changelog-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.changelog-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 13px;
  line-height: 1.6;
}

.changelog-date {
  color: var(--text-tertiary);
  white-space: nowrap;
  min-width: 80px;
}

.changelog-hash {
  color: var(--accent-primary);
  font-family: monospace;
  font-size: 12px;
  background: rgba(99, 102, 241, 0.08);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.changelog-msg {
  color: var(--text-secondary);
  flex: 1;
}

.changelog-error {
  color: var(--text-tertiary);
  font-style: italic;
}

/* Responsive */
@media (max-width: 768px) {
  body {
    padding: 16px;
  }

  header h1 {
    font-size: 26px;
  }

  .github-link {
    position: static;
    transform: none;
    margin-top: 16px;
  }

  .header-top {
    flex-direction: column;
  }

  .filter-group {
    width: 100%;
  }

  #searchInput {
    flex: 1;
    min-width: 0;
  }
}