/* ============================================
   跨境电商工具矩阵 - 公共样式
   ============================================ */

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

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --secondary: #06b6d4;
  --accent: #8b5cf6;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --bg: #f8fafc;
  --bg-white: #ffffff;
  --text: #0f172a;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius-sm: 6px;
  --radius: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

/* 顶部导航 */
.cb-header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.cb-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cb-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 18px;
}

.cb-logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
}

.cb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cb-nav a {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.2s;
}

.cb-nav a:hover,
.cb-nav a.active {
  color: var(--primary);
  background: rgba(37, 99, 235, 0.08);
}

/* 主容器 */
.cb-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 30px 20px;
}

/* 工具页面布局 */
.cb-tool-page {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 24px;
  align-items: start;
}

@media (max-width: 900px) {
  .cb-tool-page {
    grid-template-columns: 1fr;
  }
}

/* 卡片 */
.cb-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.cb-card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.cb-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.cb-card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

.cb-card-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.cb-card-body {
  padding: 24px;
}

/* 表单组 */
.cb-form-group {
  margin-bottom: 20px;
}

.cb-form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.cb-form-label .required {
  color: var(--danger);
  margin-left: 2px;
}

.cb-form-input,
.cb-form-select {
  width: 100%;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text);
  background: var(--bg-white);
  transition: border-color 0.2s, box-shadow 0.2s;
  font-family: inherit;
}

.cb-form-input:focus,
.cb-form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.cb-form-input::placeholder {
  color: var(--gray-400);
}

.cb-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.cb-form-row-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

@media (max-width: 600px) {
  .cb-form-row,
  .cb-form-row-3 {
    grid-template-columns: 1fr;
  }
}

.cb-input-group {
  display: flex;
  align-items: center;
}

.cb-input-group .cb-form-input {
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.cb-input-group-append {
  height: 40px;
  padding: 0 12px;
  background: var(--gray-100);
  border: 1px solid var(--border);
  border-left: none;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  display: flex;
  align-items: center;
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.cb-form-hint {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* 结果区域 */
.cb-result-card {
  position: sticky;
  top: 80px;
}

.cb-result-header {
  padding: 20px 24px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
}

.cb-result-header .cb-card-title {
  color: white;
}

.cb-result-header .cb-card-subtitle {
  color: rgba(255,255,255,0.8);
}

.cb-result-body {
  padding: 20px 24px;
}

.cb-result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px dashed var(--border);
}

.cb-result-item:last-child {
  border-bottom: none;
}

.cb-result-label {
  font-size: 13px;
  color: var(--text-secondary);
}

.cb-result-value {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.cb-result-value.primary {
  color: var(--primary);
}

.cb-result-value.success {
  color: var(--success);
}

.cb-result-value.danger {
  color: var(--danger);
}

.cb-result-value.warning {
  color: var(--warning);
}

.cb-result-big {
  text-align: center;
  padding: 24px 0;
  margin: 16px 0;
  background: linear-gradient(135deg, rgba(37,99,235,0.05), rgba(6,182,212,0.05));
  border-radius: var(--radius);
}

.cb-result-big .label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.cb-result-big .value {
  font-size: 36px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.cb-result-big .sub {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* 按钮 */
.cb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 40px;
  padding: 0 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  text-decoration: none;
}

.cb-btn-primary {
  background: var(--primary);
  color: white;
}

.cb-btn-primary:hover {
  background: var(--primary-dark);
}

.cb-btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
  border: 1px solid var(--border);
}

.cb-btn-secondary:hover {
  background: var(--gray-200);
}

.cb-btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.cb-btn-outline:hover {
  background: rgba(37, 99, 235, 0.05);
}

.cb-btn-sm {
  height: 32px;
  padding: 0 14px;
  font-size: 13px;
}

.cb-btn-block {
  width: 100%;
}

/* 标签 */
.cb-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.8;
}

.cb-tag-primary {
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
}

.cb-tag-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}

.cb-tag-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
}

.cb-tag-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

.cb-tag-gray {
  background: var(--gray-100);
  color: var(--gray-600);
}

.cb-tag-purple {
  background: rgba(139, 92, 246, 0.1);
  color: var(--accent);
}

/* 提示框 */
.cb-alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 13px;
  line-height: 1.6;
}

.cb-alert-info {
  background: rgba(37, 99, 235, 0.06);
  border-left: 4px solid var(--primary);
  color: var(--gray-700);
}

.cb-alert-warning {
  background: rgba(245, 158, 11, 0.08);
  border-left: 4px solid var(--warning);
  color: var(--gray-700);
}

.cb-alert-success {
  background: rgba(16, 185, 129, 0.08);
  border-left: 4px solid var(--success);
  color: var(--gray-700);
}

.cb-alert-danger {
  background: rgba(239, 68, 68, 0.06);
  border-left: 4px solid var(--danger);
  color: var(--gray-700);
}

/* 选项卡 */
.cb-tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}

.cb-tab {
  flex: 1;
  padding: 8px 16px;
  text-align: center;
  border: none;
  background: transparent;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s;
  font-family: inherit;
}

.cb-tab.active {
  background: var(--bg-white);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* 进度条 */
.cb-progress {
  height: 8px;
  background: var(--gray-100);
  border-radius: 999px;
  overflow: hidden;
  margin: 10px 0;
}

.cb-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 999px;
  transition: width 0.3s ease;
}

/* 分隔线 */
.cb-divider {
  height: 1px;
  background: var(--border);
  margin: 20px 0;
}

/* 工具列表网格(首页用) */
.cb-tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.cb-tool-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: all 0.25s;
  display: block;
  position: relative;
  overflow: hidden;
}

.cb-tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.cb-tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}

.cb-tool-card:hover::before {
  transform: scaleX(1);
}

.cb-tool-card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 14px;
}

.cb-tool-card-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.cb-tool-card-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}

.cb-tool-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* 页脚 */
.cb-footer {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
  font-size: 13px;
  border-top: 1px solid var(--border);
  margin-top: 60px;
  background: var(--bg-white);
}

.cb-footer a {
  color: var(--primary);
  text-decoration: none;
}

/* 相关工具推荐 */
.cb-related-tools {
  margin-top: 24px;
}

.cb-related-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}

.cb-related-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cb-related-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: inherit;
  transition: background 0.2s;
  border: 1px solid transparent;
}

.cb-related-item:hover {
  background: var(--gray-50);
  border-color: var(--border);
}

.cb-related-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.cb-related-text {
  flex: 1;
  min-width: 0;
}

.cb-related-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}

.cb-related-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 1px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cb-related-arrow {
  color: var(--gray-400);
  font-size: 14px;
  flex-shrink: 0;
}

/* Hero区域(首页) */
.cb-hero {
  text-align: center;
  padding: 60px 20px 40px;
  background: linear-gradient(135deg, rgba(37,99,235,0.05), rgba(6,182,212,0.05));
  border-radius: var(--radius-lg);
  margin-bottom: 40px;
}

.cb-hero h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cb-hero p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.cb-hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 32px;
}

.cb-hero-stat .num {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
}

.cb-hero-stat .label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

@media (max-width: 600px) {
  .cb-hero-stats {
    gap: 24px;
  }
  .cb-hero h1 {
    font-size: 24px;
  }
}

/* 分类导航 */
.cb-category-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.cb-category-btn {
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-white);
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.cb-category-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.cb-category-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* 表格 */
.cb-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.cb-table th {
  background: var(--gray-50);
  font-weight: 600;
  text-align: left;
  padding: 10px 14px;
  border-bottom: 2px solid var(--border);
  color: var(--gray-700);
  white-space: nowrap;
}

.cb-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}

.cb-table tr:hover td {
  background: var(--gray-50);
}

.cb-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* 饼图容器 */
.cb-chart-container {
  width: 100%;
  height: 250px;
  margin: 16px 0;
}

/* 问卷样式 */
.cb-quiz-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.cb-quiz-progress-bar {
  flex: 1;
  height: 6px;
  background: var(--gray-200);
  border-radius: 999px;
  overflow: hidden;
}

.cb-quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 999px;
  transition: width 0.3s;
}

.cb-quiz-progress-text {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.cb-quiz-question {
  margin-bottom: 24px;
}

.cb-quiz-question h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.cb-quiz-question p {
  color: var(--text-secondary);
  font-size: 14px;
}

.cb-quiz-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
}

.cb-quiz-option {
  padding: 16px 20px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
  font-size: 14px;
  background: var(--bg-white);
}

.cb-quiz-option:hover {
  border-color: var(--primary-light);
  background: rgba(37, 99, 235, 0.02);
}

.cb-quiz-option.selected {
  border-color: var(--primary);
  background: rgba(37, 99, 235, 0.06);
}

.cb-quiz-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

/* 结果卡片（对比表格用） */
.cb-compare-row {
  display: grid;
  grid-template-columns: 120px repeat(auto-fit, minmax(110px, 1fr));
  gap: 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.cb-compare-row.header {
  background: var(--gray-50);
  font-weight: 600;
}

.cb-compare-row > div {
  padding: 12px;
  border-right: 1px solid var(--border);
}

.cb-compare-row > div:last-child {
  border-right: none;
}

.cb-compare-row .label-col {
  color: var(--text-secondary);
  background: var(--gray-50);
}

.cb-compare-row .best {
  background: rgba(16, 185, 129, 0.08);
  color: var(--success);
  font-weight: 600;
}

/* 动画 */
@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.cb-fade-in {
  animation: slideUp 0.3s ease;
}

/* 响应式 */
@media (max-width: 768px) {
  .cb-container {
    padding: 16px;
  }

  .cb-card-body {
    padding: 16px;
  }

  .cb-card-header {
    padding: 16px;
  }

  .cb-result-card {
    position: static;
  }

  .cb-nav {
    display: none;
  }
}