/* BYWD 交流反馈中心 · 设计令牌（tokens）
 * 复用官网品牌色，不使用 buy.ligen.cn 的青蓝 #0891B2
 */

:root {
  /* === 品牌色 === */
  --brand-primary: #1f2937;      /* 深灰主色，克制稳重 */
  --brand-primary-hover: #111827;
  --brand-accent: #2563eb;       /* 交互强调蓝 */
  --brand-accent-hover: #1d4ed8;

  /* === 中性色 === */
  --bg-page: #fafafa;
  --bg-card: #ffffff;
  --bg-muted: #f4f4f5;
  --border: #e5e7eb;
  --border-hover: #d4d4d8;

  /* === 文字 === */
  --text-primary: #18181b;
  --text-secondary: #52525b;
  --text-muted: #a1a1aa;
  --text-inverse: #ffffff;

  /* === 状态色 === */
  --status-open: #dc2626;
  --status-in-progress: #ea580c;
  --status-resolved: #16a34a;
  --status-closed: #6b7280;

  /* === 类型标记（kind）=== */
  --kind-discussion: #6b7280;
  --kind-bug: #dc2626;
  --kind-idea: #2563eb;
  --kind-ticket: #9333ea;

  /* === 尺寸 === */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-card: 0 1px 2px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.06);
  --shadow-card-hover: 0 2px 8px rgba(0,0,0,0.08), 0 4px 16px rgba(0,0,0,0.06);

  /* === 布局 === */
  --max-width: 1120px;
  --header-h: 56px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB',
               'Microsoft YaHei', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--brand-accent);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

button {
  cursor: pointer;
  font-family: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* === 容器 === */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* === Header === */
.site-header {
  height: var(--header-h);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.site-logo {
  font-weight: 600;
  font-size: 16px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.site-logo .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--brand-accent);
}
.site-nav {
  display: flex;
  gap: 20px;
  align-items: center;
}
.site-nav a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 14px;
}
.site-nav a.active,
.site-nav a:hover {
  color: var(--text-primary);
  text-decoration: none;
}

/* === 按钮 === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 500;
  transition: all .15s;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--brand-primary);
  color: var(--text-inverse);
}
.btn-primary:hover { background: var(--brand-primary-hover); text-decoration: none; }
.btn-accent {
  background: var(--brand-accent);
  color: var(--text-inverse);
}
.btn-accent:hover { background: var(--brand-accent-hover); text-decoration: none; }
.btn-outline {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-outline:hover { border-color: var(--border-hover); text-decoration: none; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 16px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* === 卡片 === */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  padding: 16px;
  transition: box-shadow .15s, border-color .15s;
}
.card:hover {
  box-shadow: var(--shadow-card-hover);
}

/* === 表单 === */
.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-primary);
}
.form-hint { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-primary);
  transition: border-color .15s, box-shadow .15s;
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--brand-accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.6;
}
.form-error {
  color: var(--status-open);
  font-size: 12px;
  margin-top: 4px;
}

/* === 徽章 / 标签 === */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 500;
  line-height: 1.4;
  background: var(--bg-muted);
  color: var(--text-secondary);
}
.badge-open { background: #fef2f2; color: var(--status-open); }
.badge-in_progress { background: #fff7ed; color: var(--status-in-progress); }
.badge-resolved { background: #f0fdf4; color: var(--status-resolved); }
.badge-closed { background: #f4f4f5; color: var(--status-closed); }
.badge-private { background: #faf5ff; color: #9333ea; }
.badge-public { background: #eff6ff; color: var(--brand-accent); }

/* === 标签 chip === */
.label-chip {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
  line-height: 1.4;
  color: #fff;
}

/* === 筛选 tabs === */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  overflow-x: auto;
}
.tabs .tab {
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 13px;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: all .15s;
}
.tabs .tab:hover {
  color: var(--text-primary);
  background: var(--bg-muted);
}
.tabs .tab.active {
  color: var(--text-primary);
  background: var(--bg-muted);
  border-color: var(--border);
}

/* === 列表 === */
.issue-list { display: flex; flex-direction: column; gap: 12px; }
.issue-item {
  display: flex;
  gap: 14px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color .15s, box-shadow .15s;
}
.issue-item:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card-hover);
}
.issue-item .vote-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 48px;
}
.issue-item .vote-col button {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0;
  font-size: 18px;
  line-height: 1;
}
.issue-item .vote-col button:hover { color: var(--brand-accent); }
.issue-item .vote-col .count {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}
.issue-item .content-col { flex: 1; min-width: 0; }
.issue-item .title-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
  flex-wrap: wrap;
}
.issue-item .title-row a {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 15px;
}
.issue-item .title-row a:hover { color: var(--brand-accent); text-decoration: none; }
.issue-item .meta-row {
  display: flex;
  gap: 14px;
  font-size: 12px;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.issue-item .excerpt {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* === 详情页 === */
.issue-detail .body-content {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-primary);
}

/* === 回复列表 === */
.reply-list { display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }
.reply-item {
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.reply-item.internal {
  border-left: 3px solid #ea580c;
  background: #fffaf0;
}
.reply-item.operator {
  border-left: 3px solid var(--brand-accent);
}
.reply-item .reply-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--text-muted);
}
.reply-item .reply-header .name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 13px;
}
.reply-item .reply-body {
  font-size: 14px;
  line-height: 1.7;
  white-space: pre-wrap;
}

/* === Footer === */
.site-footer {
  margin-top: 60px;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12px;
  text-align: center;
}

/* === 空状态 === */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state .icon { font-size: 48px; margin-bottom: 12px; opacity: .4; }

/* === 产品选择器 === */
.product-selector {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.product-chip {
  padding: 6px 14px;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all .15s;
}
.product-chip:hover { border-color: var(--brand-accent); }
.product-chip.active {
  border-color: var(--brand-accent);
  background: var(--brand-accent);
  color: var(--text-inverse);
}

/* === 分页 === */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
  margin-top: 24px;
}
.pagination button,
.pagination a {
  min-width: 32px;
  height: 32px;
  padding: 0 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.pagination .current {
  background: var(--brand-accent);
  border-color: var(--brand-accent);
  color: var(--text-inverse);
}

/* === 提示条 === */
.alert {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 13px;
}
.alert-info { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }
.alert-warning { background: #fff7ed; color: #c2410c; border: 1px solid #fed7aa; }
.alert-error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.alert-success { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }

/* === 响应式 === */
@media (max-width: 640px) {
  .issue-item { flex-direction: column; }
  .issue-item .vote-col {
    flex-direction: row;
    gap: 8px;
    min-width: unset;
    align-items: center;
  }
  .site-nav { gap: 12px; }
}