/* ==============================
   AI问答 - 独立频道样式
   风格：问答/对话感，蓝色Q + 绿色A，清爽直白
   ============================== */

.qa-channel-page { background: var(--muted); }

/* --- 列表页 --- */
.qc-wrap {
  max-width: 48rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

/* 搜索型头部 */
.qc-hero {
  background: linear-gradient(135deg, #1e40af 0%, #3b82f6 50%, #60a5fa 100%);
  border-radius: 4px;
  padding: 2.5rem 2rem;
  margin-bottom: 1.5rem;
  text-align: center;
  color: #fff;
}
.dark .qc-hero {
  background: linear-gradient(135deg, #1e3a5f 0%, #1e40af 50%, #2563eb 100%);
}
.qc-hero-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  margin-bottom: 0.75rem;
}
.qc-hero h1 {
  font-size: 1.75rem;
  font-weight: 800;
  margin: 0 0 0.25rem;
}
.qc-hero p {
  font-size: 0.875rem;
  opacity: 0.85;
  margin: 0 0 1.25rem;
}

/* 搜索框 */
.qc-search {
  position: relative;
  max-width: 28rem;
  margin: 0 auto 1rem;
}
.qc-search-input {
  width: 100%;
  height: 2.75rem;
  padding: 0 2.5rem 0 1rem;
  border: none;
  border-radius: 2rem;
  font-size: 0.875rem;
  background: rgba(255,255,255,0.95);
  color: #1e293b;
  outline: none;
}
.qc-search-input::placeholder { color: #94a3b8; }
.qc-search svg {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: #64748b;
}

/* 热门标签 */
.qc-hero-tags {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.375rem;
}
.qc-hot-tag {
  font-size: 0.6875rem;
  padding: 0.25rem 0.75rem;
  border-radius: 2rem;
  background: rgba(255,255,255,0.2);
  color: #fff;
  cursor: pointer;
  transition: background 0.15s;
}
.qc-hot-tag:hover { background: rgba(255,255,255,0.35); }

/* 分类条 */
.qc-cats {
  display: flex;
  gap: 0;
  margin-bottom: 1.25rem;
  border-bottom: 2px solid var(--border);
}
.qc-cat {
  padding: 0.625rem 1rem;
  font-size: 0.8125rem;
  color: var(--fg-secondary);
  cursor: pointer;
  position: relative;
  transition: color 0.15s;
  white-space: nowrap;
}
.qc-cat:hover { color: var(--fg); }
.qc-cat.active {
  color: #2563eb;
  font-weight: 600;
}
.qc-cat.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: #2563eb;
}

/* 问答列表 - 对话卡 */
.qc-list { display: flex; flex-direction: column; gap: 0.75rem; }

.qc-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.25rem 1.5rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.qc-item:hover {
  border-color: color-mix(in srgb, #2563eb 30%, var(--border));
  box-shadow: 0 2px 12px color-mix(in srgb, #2563eb 8%, transparent);
}

/* Q行 */
.qc-q {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}
.qc-q-icon {
  flex-shrink: 0;
  width: 1.625rem;
  height: 1.625rem;
  border-radius: 50%;
  background: #2563eb;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
}
.qc-q-icon-lg {
  width: 2.25rem;
  height: 2.25rem;
  font-size: 1rem;
}
.qc-q-body { flex: 1; }
.qc-q-text {
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
  text-decoration: none;
  line-height: 1.5;
  display: inline;
  transition: color 0.15s;
}
.qc-q-text:hover { color: #2563eb; }

/* 分类标签 */
.qc-q-cat {
  display: inline-block;
  font-size: 0.5625rem;
  font-weight: 600;
  padding: 0.0625rem 0.375rem;
  border-radius: 2px;
  margin-left: 0.5rem;
  vertical-align: middle;
}
.qc-cat-basic { background: #eff6ff; color: #2563eb; }
.qc-cat-tool { background: #f0fdf4; color: #16a34a; }
.qc-cat-concept { background: #faf5ff; color: #7c3aed; }
.qc-cat-pit { background: #fff7ed; color: #ea580c; }
.dark .qc-cat-basic { background: color-mix(in srgb, #2563eb 15%, transparent); color: #93c5fd; }
.dark .qc-cat-tool { background: color-mix(in srgb, #16a34a 15%, transparent); color: #86efac; }
.dark .qc-cat-concept { background: color-mix(in srgb, #7c3aed 15%, transparent); color: #c4b5fd; }
.dark .qc-cat-pit { background: color-mix(in srgb, #ea580c 15%, transparent); color: #fdba74; }

/* A行 */
.qc-a {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding-left: 0.25rem;
}
.qc-a-icon {
  flex-shrink: 0;
  width: 1.625rem;
  height: 1.625rem;
  border-radius: 50%;
  background: #16a34a;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
}
.qc-a-icon-lg {
  width: 2.25rem;
  height: 2.25rem;
  font-size: 1rem;
}
.qc-a-body {
  flex: 1;
  font-size: 0.8125rem;
  color: var(--fg-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 元信息 */
.qc-item-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.6875rem;
  color: var(--muted-fg);
  margin-top: 0.75rem;
  padding-top: 0.625rem;
  border-top: 1px dashed var(--border);
}

/* 分页 */
.qc-pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2rem;
}
.qc-page-active, .qc-page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  height: 2rem;
  padding: 0 0.5rem;
  border-radius: 2rem;
  font-size: 0.8125rem;
  border: 1px solid var(--border);
}
.qc-page-active {
  background: #2563eb;
  color: #fff;
  border-color: #2563eb;
}
.qc-page-link {
  color: var(--fg-secondary);
  text-decoration: none;
}
.qc-page-link:hover { border-color: #2563eb; color: #2563eb; }

/* --- 详情页 --- */
.qd-wrap {
  max-width: 48rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}
.qd-breadcrumb {
  font-size: 0.75rem;
  color: var(--muted-fg);
  margin-bottom: 1.25rem;
}
.qd-breadcrumb a { color: var(--primary); text-decoration: none; }
.qd-breadcrumb em { font-style: normal; color: var(--fg); }

/* 问题卡片 */
.qd-question {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-left: 4px solid #2563eb;
}
.qd-question-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.75rem;
  color: var(--muted-fg);
  margin-bottom: 0.5rem;
}
.qd-question-title {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--fg);
  line-height: 1.4;
  margin: 0;
}

/* 回答区 */
.qd-answer {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.5rem;
  border-left: 4px solid #16a34a;
}
.qd-answer-body {
  flex: 1;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--fg);
}
.qd-answer-body h3 {
  font-size: 1rem;
  font-weight: 700;
  margin: 1.5rem 0 0.5rem;
}
.qd-answer-body p { margin: 0 0 0.75rem; }
.qd-answer-body ol, .qd-answer-body ul { margin: 0 0 0.75rem; padding-left: 1.5rem; }
.qd-answer-body li { margin-bottom: 0.375rem; }

/* 核心要点 */
.qd-key-point {
  background: #eff6ff;
  border-left: 3px solid #2563eb;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  border-radius: 0 4px 4px 0;
}
.dark .qd-key-point { background: color-mix(in srgb, #2563eb 8%, var(--card)); }
.qd-key-point strong {
  display: block;
  font-size: 0.8125rem;
  color: #2563eb;
  margin-bottom: 0.25rem;
}
.qd-key-point p { margin: 0; font-size: 0.875rem; }

/* 误解网格 */
.qd-myth-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 1rem 0;
}
.qd-myth {
  text-align: center;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #fef2f2;
}
.dark .qd-myth { background: color-mix(in srgb, #ef4444 6%, var(--card)); }
.qd-myth-x {
  display: inline-flex;
  width: 1.25rem;
  height: 1.25rem;
  align-items: center;
  justify-content: center;
  background: #ef4444;
  color: #fff;
  border-radius: 50%;
  font-size: 0.625rem;
  font-weight: 700;
  margin-bottom: 0.375rem;
}
.qd-myth p { font-size: 0.75rem; color: var(--fg-secondary); margin: 0; }

/* 提示框 */
.qd-tip-box {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: #fffbeb;
  border-radius: 4px;
  margin: 1rem 0;
  font-size: 0.8125rem;
  color: var(--fg-secondary);
}
.dark .qd-tip-box { background: color-mix(in srgb, #f59e0b 8%, var(--card)); }
.qd-tip-box svg { flex-shrink: 0; margin-top: 0.125rem; color: #d97706; }
.qd-tip-box p { margin: 0; }

/* 互动 */
.qd-actions {
  display: flex;
  gap: 0.75rem;
  margin: 1.5rem 0;
  padding: 1rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.qd-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 2rem;
  background: var(--card);
  color: var(--fg-secondary);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.qd-action-btn:hover { border-color: #2563eb; color: #2563eb; }
.qd-useful.active { background: #2563eb; color: #fff; border-color: #2563eb; }

/* 相关问答 */
.qd-related {
  margin-top: 1.5rem;
}
.qd-related-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--fg);
  margin: 0 0 1rem;
}
.qd-related-list { display: flex; flex-direction: column; gap: 0; }
.qd-related-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
  transition: color 0.15s;
}
.qd-related-item:last-child { border-bottom: none; }
.qd-related-item:hover { color: #2563eb; }
.qd-related-item span:nth-child(2) {
  flex: 1;
  font-size: 0.875rem;
}
.qd-related-cat {
  font-size: 0.5625rem;
  font-weight: 600;
  padding: 0.0625rem 0.375rem;
  border-radius: 2px;
  flex-shrink: 0;
}

/* 响应式 */
@media (max-width: 768px) {
  .qc-hero { padding: 1.5rem 1rem; }
  .qc-hero h1 { font-size: 1.375rem; }
  .qc-cats { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .qc-item { padding: 1rem; }
  .qc-q-icon, .qc-a-icon { width: 1.375rem; height: 1.375rem; font-size: 0.6875rem; }
  .q-q-icon-lg, .qc-a-icon-lg { width: 1.75rem; height: 1.75rem; font-size: 0.8125rem; }
  .qd-myth-grid { grid-template-columns: 1fr; }
  .qd-question-title { font-size: 1.125rem; }
  .qd-answer { flex-direction: column; }
  .qd-actions { flex-wrap: wrap; }
}