/* ============ 全局样式 ============ */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-primary-dark); text-decoration: underline; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  font-size: inherit;
}

input {
  font-family: inherit;
  font-size: inherit;
}

/* ============ 顶部导航栏 ============ */
.top-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.top-bar .logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  flex-shrink: 0;
}

.top-bar .logo-icon {
  width: 36px;
  height: 36px;
  background: transparent;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  overflow: visible;
}

/* ============ 搜索框 ============ */
.search-container {
  flex: 1 1 280px;
  max-width: 480px;
  min-width: 200px;
  position: relative;
}

.search-input {
  width: 100%;
  height: 38px;
  padding: 0 var(--space-lg) 0 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-bg);
  font-size: var(--font-size-base);
  color: var(--color-text);
  transition: all var(--transition-fast);
  outline: none;
}

/* ============ 顶部右侧广告 ============ */
.top-ad-desktop {
  display: none;
  align-items: center;
  gap: var(--space-md);
  margin-left: auto;
  flex-shrink: 0;
}

/* QQ 群 banner */
.qq-group-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  background: linear-gradient(135deg, #e3f0fc 0%, #d0e8fa 100%);
  border: 1.5px solid #b8d4f0;
  border-radius: 8px;
  padding: 6px 16px 6px 10px;
  transition: all 0.2s;
  white-space: nowrap;
}

.qq-group-banner:hover {
  background: linear-gradient(135deg, #d0e8fa 0%, #bddcf5 100%);
  border-color: #8ec5f0;
  box-shadow: 0 2px 8px rgba(66, 133, 244, 0.15);
  text-decoration: none;
}

.qq-group-banner .qq-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  object-fit: contain;
}

.qq-group-banner .qq-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.qq-group-banner .qq-title {
  font-size: 14px;
  font-weight: 700;
  color: #1a56db;
  line-height: 1.2;
}

.qq-group-banner .qq-subtitle {
  font-size: 11px;
  color: #5a7da8;
  line-height: 1.2;
}

@media (min-width: 769px) {
  .top-ad-desktop {
    display: flex;
  }
}

.search-input:focus {
  border-color: var(--color-primary);
  background: var(--color-surface);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-input::placeholder {
  color: var(--color-text-placeholder);
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-placeholder);
  font-size: 16px;
  pointer-events: none;
}

.search-clear {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-border);
  color: var(--color-text-muted);
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  cursor: pointer;
}
.search-clear.visible { display: flex; }

/* 搜索结果下拉 */
.search-results {
  position: absolute;
  top: 44px;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-height: 400px;
  overflow-y: auto;
  display: none;
  z-index: 200;
}

.search-results.active { display: block; }

.search-result-item {
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  transition: background var(--transition-fast);
  border-bottom: 1px solid var(--color-border-light);
}

.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--color-primary-bg); }

.search-result-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.search-result-icon.stock { background: var(--color-primary-bg); color: var(--color-primary); }
.search-result-icon.concept { background: var(--color-warning-bg); color: var(--color-warning); }

.search-result-info { flex: 1; min-width: 0; }
.search-result-name { font-size: var(--font-size-base); font-weight: 600; color: var(--color-text); }
.search-result-code { font-size: var(--font-size-xs); color: var(--color-text-muted); }
.search-result-meta { font-size: var(--font-size-xs); color: var(--color-text-muted); margin-top: 2px; }

.search-no-results {
  padding: var(--space-2xl);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* 搜索分类标签 */
.search-section-label {
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--color-bg);
}

/* ============ 页面主体 ============ */
.main-content {
  margin-top: var(--header-height);
  padding: var(--space-xl) var(--space-2xl);
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  min-height: calc(100vh - var(--header-height));
}

/* ============ 页面过渡 ============ */
.page {
  display: none;
  animation: fadeIn 0.25s ease;
}
.page.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ 卡片 ============ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
  transition: box-shadow var(--transition-normal);
}
.card:hover { box-shadow: var(--shadow-md); }
.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
}

/* ============ 概念类型标签 ============ */
.type-tag {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 1px 8px;
  border-radius: 10px;
}

.type-tag.行业,
.type-tag.题材,
.type-tag.指数,
.type-tag.地域,
.type-tag.市场 { background: var(--type-行业-bg); color: var(--type-行业); }

/* ============ 加载状态 ============ */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl);
  color: var(--color-text-muted);
  font-size: var(--font-size-base);
}

.loading-spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-right: var(--space-md);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============ 错误状态 ============ */
.error-state {
  text-align: center;
  padding: var(--space-3xl);
  color: var(--color-danger);
}
.error-state .error-icon { font-size: 48px; margin-bottom: var(--space-lg); }

/* ============ 空状态 ============ */
.empty-state {
  text-align: center;
  padding: var(--space-3xl);
  color: var(--color-text-muted);
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-dark); }

.btn-outline {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary-bg); }

.btn-ghost {
  background: var(--color-bg);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}
.btn-ghost:hover { background: var(--color-primary-bg2); }

/* ============ 页脚 ============ */
.footer {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--color-text-placeholder);
  font-size: var(--font-size-xs);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-3xl);
}

/* ============ 滚动条 ============ */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-placeholder); }

/* ============ 工具提示 ============ */
.tooltip {
  position: absolute;
  background: var(--color-text);
  color: #fff;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  pointer-events: none;
  z-index: 300;
  max-width: 280px;
  line-height: 1.5;
  display: none;
}