/* ==================== 全局基础样式 ==================== */
* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

:root {
  /* ===== 科技紫主色系（全站清一色） ===== */
  --primary:        #8B7CF6;
  --primary-dark:   #5B4BC4;
  --primary-light:  #B3A6FA;
  --primary-soft:   #211C3A;   /* 深色紫软底：chips / 标签背景 */
  /* 霓虹青点缀（科技感辅助色） */
  --accent:         #22D3EE;
  --accent-dark:    #0EA5C4;
  /* 语义色（深色友好） */
  --success:        #34D399;
  --danger:         #F87171;
  --warn:           #FBBF24;
  /* 表面 / 文字（深色模式） */
  --bg:             #0E0E14;
  --card-bg:        #16161F;
  --text:           #E6E6EF;
  --text-secondary: #9A9AB0;
  --text-muted:     #6E6E85;
  --border:         rgba(139,124,246,.22);
  --card-border:    rgba(139,124,246,.28);
  --shadow:         0 6px 22px rgba(0,0,0,.45);
  --glow:           0 6px 22px rgba(139,124,246,.30);
  --radius:         14px;
  --radius-sm:      10px;
  --grad-primary:   linear-gradient(135deg, #8B7CF6, #5B4BC4);
  --grad-header:    linear-gradient(135deg, #241653, #5B4BC4);
  --grad-accent:    linear-gradient(135deg, #22D3EE, #0EA5C4);
  --transition:     all 0.2s ease;
}

html, body {
  height: 100%;
  font-family: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  background-image:
    radial-gradient(900px 520px at 10% -10%, rgba(139,124,246,0.16), transparent 60%),
    radial-gradient(760px 460px at 100% 0%, rgba(34,211,238,0.10), transparent 55%);
  background-attachment: scroll;
  color: var(--text);
  font-size: var(--fs-base, 14px);
  line-height: 1.5;
  overflow-x: hidden;
}

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

/* ==================== 头部 ==================== */
.header {
  background: linear-gradient(180deg, #14121F, #0E0E14);
  color: #E6E6EF;
  padding: 16px 14px 50px;
  position: relative;
  overflow: hidden;
}
.header::after {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 100px;
  height: 100px;
  background: rgba(139,124,246,0.10);
  border-radius: 50%;
}
.header h1 {
  font-size: var(--fs-base, 14px);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 5px;
  position: relative;
  z-index: 1;
}
.header p {
  font-size: var(--fs-base, 14px);
  opacity: 0.85;
  margin-top: 3px;
  position: relative;
  z-index: 1;
}
.header-badge {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 2px 8px;
  border-radius: 16px;
  font-size: var(--fs-base, 14px);
  font-weight: 600;
  margin-top: 6px;
  position: relative;
  z-index: 1;
}

/* ==================== 步骤指示器 ==================== */
.steps-bar {
  margin: -26px 14px 0;
  position: relative;
  z-index: 10;
  display: flex;
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 3px;
  box-shadow: var(--shadow);
}
.step-dot {
  flex: 1;
  text-align: center;
  padding: 8px 4px;
  font-size: var(--fs-base, 14px);
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 8px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  white-space: nowrap;
  position: relative;
}
.step-dot .step-icon {
  font-size: var(--fs-base, 14px);
}
.step-dot.active {
  background: var(--primary);
  color: white;
  font-weight: 600;
}
.step-dot.done {
  color: var(--success);
}
.step-dot.done::after {
  content: '✓';
  position: absolute;
  top: 1px;
  right: 4px;
  font-size: var(--fs-base, 14px);
}

/* ==================== 内容区域 ==================== */
.content {
  padding: 7px;
  padding-bottom: 100px;
}

/* ==================== 卡片 ==================== */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 7px;
  margin-bottom: 5px;
  box-shadow: var(--shadow);
}
.card-title {
  font-size: var(--fs-base, 14px);
  font-weight: 700;
  margin-bottom: 5px;
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--text);
}
.card-title .icon { font-size: var(--fs-base, 14px); }
.card-subtitle {
  font-size: var(--fs-base, 14px);
  color: var(--text-secondary);
  margin: -8px 0 10px;
}

/* ==================== 表单 ==================== */
.form-group {
  margin-bottom: 5px;
}
.form-label {
  display: block;
  font-size: var(--fs-base, 14px);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 3px;
}
.form-label .required {
  color: var(--danger);
  margin-left: 2px;
}
.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 9px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: var(--fs-base, 14px);
  color: var(--text);
  background: #0F0F16;
  outline: none;
  transition: var(--transition);
  font-family: inherit;
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--primary);
  background: #16161F;
  box-shadow: 0 0 0 3px rgba(139,124,246,0.14);
}
.form-textarea {
  resize: none;
  height: 60px;
}
.form-row {
  display: flex;
  gap: 5px;
}
.form-row > * { flex: 1; }
.form-hint {
  font-size: var(--fs-base, 14px);
  color: var(--text-muted);
  margin-top: 3px;
}

/* ==================== 选择卡片（可点击） ==================== */
.option-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 5px;
}
.option-grid.cols-2 { grid-template-columns: 1fr 1fr; }
.option-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }

.option-chip {
  padding: 8px 6px;
  background: #1A1A24;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: var(--fs-base, 14px);
  color: var(--text-secondary);
  user-select: none;
}
.option-chip:hover {
  border-color: rgba(139,124,246,.5);
  background: #20202c;
}
.option-chip.selected {
  border-color: var(--primary);
  background: rgba(139,124,246,.18);
  color: #cbbcff;
  font-weight: 600;
}
.option-chip .chip-icon {
  font-size: 16px;
  display: block;
  margin-bottom: 3px;
}
.option-chip .chip-price {
  font-size: var(--fs-base, 14px);
  color: var(--accent-dark);
  margin-top: 2px;
}

/* ==================== 系列型号卡片 ==================== */
.series-card {
  padding: 7px;
  background: #1A1A24;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 5px;
}
.series-card:hover {
  border-color: rgba(139,124,246,.5);
}
.series-card.selected {
  border-color: var(--primary);
  background: rgba(139,124,246,.18);
}
.series-card .series-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3px;
}
.series-card .series-name {
  font-size: var(--fs-base, 14px);
  font-weight: 700;
  color: var(--text);
}
.series-card .series-brand {
  font-size: var(--fs-base, 14px);
  padding: 2px 6px;
  border-radius: 8px;
  font-weight: 600;
}
.brand-domestic { background: #E7F9EE; color: #1E9E5A; }
.brand-joint { background: var(--primary-soft); color: var(--primary-dark); }
.brand-imported { background: #E6FAFE; color: var(--accent-dark); }
.series-card .series-desc {
  font-size: var(--fs-base, 14px);
  color: var(--text-secondary);
  margin-bottom: 3px;
}
.series-card .series-features {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
}
.series-feature-tag {
  font-size: var(--fs-base, 14px);
  padding: 2px 6px;
  background: #0F0F16;
  border-radius: 3px;
  color: var(--text-secondary);
}
.series-card .series-price {
  font-size: var(--fs-base, 14px);
  font-weight: 700;
  color: var(--primary);
  margin-top: 4px;
}

/* ==================== 底部操作栏 ==================== */
.footer-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #16161F;
  padding: 3px 14px;
  box-shadow: 0 -2px 12px rgba(0,0,0,0.45);
  z-index: 100;
  display: flex;
  gap: 5px;
  align-items: center;
  border-top: 1px solid rgba(139,124,246,.2);
}
.footer-bar .price-preview {
  flex: 1;
}
.footer-bar .price-preview .price-label {
  font-size: var(--fs-base, 14px);
  color: var(--text-muted);
}
.footer-bar .price-preview .price-value {
  font-size: var(--fs-base, 14px);
  font-weight: 800;
  color: var(--primary);
}
.footer-bar .price-preview .price-value small {
  font-size: var(--fs-base, 14px);
  font-weight: 400;
  color: var(--text-secondary);
}

/* ==================== 按钮 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: var(--fs-base, 14px);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  font-family: inherit;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--grad-primary);
  color: white;
  min-width: 90px;
  box-shadow: 0 4px 14px rgba(139,124,246,.30);
}
.btn-primary:hover { filter: brightness(1.06); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-outline {
  background: #1A1A24;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-accent {
  background: var(--accent);
  color: white;
}
.btn-success {
  background: var(--success);
  color: white;
}
.btn-block {
  width: 100%;
  padding: 11px;
  font-size: var(--fs-base, 14px);
  border-radius: var(--radius);
}
.btn-sm { padding: 5px 10px; font-size: var(--fs-sm, 13px); }
.btn-lg { padding: 11px 22px; font-size: var(--fs-base, 14px); }

/* ==================== Toast ==================== */
.toast-container {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 5px;
  pointer-events: none;
}
.toast {
  padding: 10px 18px;
  border-radius: 6px;
  color: white;
  font-size: var(--fs-base, 14px);
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
  pointer-events: auto;
  text-align: center;
  max-width: 280px;
}
.toast-error { background: var(--danger); }
.toast-success { background: var(--success); }
.toast-info { background: var(--primary); }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes toastOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* ==================== AI推荐专区 ==================== */
.ai-hero {
  text-align: center;
  padding: 8px 0;
}
.ai-hero .ai-icon {
  font-size: 28px;
  margin-bottom: 5px;
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
.ai-hero h2 {
  font-size: var(--fs-base, 14px);
  font-weight: 700;
  margin-bottom: 3px;
}
.ai-hero .ai-subtitle {
  font-size: var(--fs-base, 14px);
  color: var(--text-secondary);
  margin-bottom: 5px;
}

.ai-input-wrap {
  position: relative;
}
.ai-input {
  width: 100%;
  padding: 11px 44px 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: var(--fs-base, 14px);
  background: #0F0F16;
  outline: none;
  transition: var(--transition);
  font-family: inherit;
}
.ai-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(139,124,246,0.18);
}
.ai-input::placeholder {
  color: #5a5a72;
}
.ai-submit-btn {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  border: none;
  color: white;
  font-size: var(--fs-base, 14px);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.ai-submit-btn:active { transform: translateY(-50%) scale(0.9); }
.ai-submit-btn:disabled { opacity: 0.5; }

.ai-examples {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.ai-example-tag {
  font-size: var(--fs-base, 14px);
  padding: 3px 8px;
  background: #1A1A24;
  border-radius: 10px;
  color: var(--text-secondary);
  cursor: pointer;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.ai-example-tag:hover {
  background: rgba(139,124,246,.18);
  border-color: var(--primary-light);
  color: var(--primary);
}

.ai-thinking {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 13px;
  color: var(--text-secondary);
  font-size: var(--fs-base, 14px);
}
.ai-thinking .dot-pulse {
  display: flex;
  gap: 3px;
}
.ai-thinking .dot-pulse span {
  width: 5px;
  height: 5px;
  background: var(--primary);
  border-radius: 50%;
  animation: dotPulse 1.4s infinite ease-in-out;
}
.ai-thinking .dot-pulse span:nth-child(2) { animation-delay: 0.2s; }
.ai-thinking .dot-pulse span:nth-child(3) { animation-delay: 0.4s; }
@keyframes dotPulse {
  0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
  40% { opacity: 1; transform: scale(1.2); }
}

.ai-result-card {
  background: linear-gradient(135deg, rgba(139,124,246,.14), rgba(34,211,238,.05));
  border: 1.5px solid rgba(139,124,246,.4);
  border-radius: var(--radius);
  padding: 7px;
  margin-bottom: 5px;
  cursor: pointer;
  transition: var(--transition);
}
.ai-result-card:hover {
  box-shadow: 0 4px 16px rgba(139,124,246,0.22);
}
.ai-result-card.recommended {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(34,211,238,.14), rgba(139,124,246,.08));
}
.ai-result-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 5px;
}
.ai-result-name {
  font-size: var(--fs-base, 14px);
  font-weight: 700;
}
.ai-result-badge {
  font-size: var(--fs-base, 14px);
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
}
.badge-best { background: var(--accent); color: #063B45; }
.badge-good { background: var(--primary); color: white; }

.ai-result-meta {
  display: flex;
  gap: 8px;
  margin-bottom: 5px;
  font-size: var(--fs-base, 14px);
  color: var(--text-secondary);
}
.ai-result-reason {
  font-size: var(--fs-base, 14px);
  color: var(--text-secondary);
  background: rgba(255,255,255,0.06);
  padding: 6px 10px;
  border-radius: 5px;
  margin-bottom: 5px;
}
.ai-result-price {
  font-size: var(--fs-base, 14px);
  font-weight: 800;
  color: var(--primary);
}
.ai-result-actions {
  display: flex;
  gap: 5px;
  margin-top: 8px;
}

/* ==================== 价格明细 ==================== */
.price-detail {
  background: #1A1A24;
  border-radius: var(--radius-sm);
  padding: 7px;
  margin-top: 8px;
}
.price-row {
  display: flex;
  justify-content: space-between;
  padding: 5px 0;
  font-size: var(--fs-base, 14px);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}
.price-row:last-child { border-bottom: none; }
.price-row.total {
  font-size: var(--fs-base, 14px);
  font-weight: 700;
  color: var(--primary);
  border-top: 2px solid var(--primary);
  padding-top: 8px;
  margin-top: 3px;
}
.price-row .label { display: flex; align-items: center; gap: 3px; }

/* ==================== 报价结果页 ==================== */
.quote-summary {
  background: var(--grad-header);
  color: white;
  border-radius: var(--radius);
  padding: 13px;
  text-align: center;
  margin-bottom: 5px;
}
.quote-summary .total-price {
  font-size: 18px;
  font-weight: 900;
  margin: 6px 0;
}
.quote-summary .total-price small {
  font-size: var(--fs-base, 14px);
  font-weight: 400;
}
.quote-summary .quote-meta {
  font-size: var(--fs-base, 14px);
  opacity: 0.85;
}

/* ==================== 打印/导出 ==================== */
.export-actions {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}

/* ==================== 历史记录 ==================== */
.history-item {
  padding: 7px;
  background: var(--card-bg);
  border-radius: var(--radius-sm);
  margin-bottom: 5px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}
.history-item:hover {
  border-color: var(--primary-light);
}
.history-item .hist-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3px;
}
.history-item .hist-name {
  font-weight: 700;
  font-size: var(--fs-base, 14px);
}
.history-item .hist-date {
  font-size: var(--fs-base, 14px);
  color: var(--text-muted);
}
.history-item .hist-price {
  font-size: var(--fs-base, 14px);
  font-weight: 700;
  color: var(--primary);
}
.history-item .hist-detail {
  font-size: var(--fs-base, 14px);
  color: var(--text-secondary);
}

/* ==================== 空状态 ==================== */
.empty-state {
  text-align: center;
  padding: 30px 16px;
  color: var(--text-muted);
}
.empty-state .empty-icon {
  font-size: 28px;
  margin-bottom: 5px;
}
.empty-state p {
  font-size: var(--fs-base, 14px);
}

/* ==================== 隐藏/显示 ==================== */
.hidden { display: none !important; }

/* ==================== 响应式 ==================== */
@media (max-width: 380px) {
  .option-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { flex-direction: column; gap: 0; }
  .export-actions { flex-direction: column; }
}
@media (min-width: 768px) {
  .content { max-width: 600px; margin: 0 auto; }
  .steps-bar { max-width: 600px; margin-left: auto; margin-right: auto; }
  .header { text-align: center; padding: 24px 14px 56px; }
  .option-grid { grid-template-columns: repeat(4, 1fr); }
}

/* 桌面端保留固定背景（性能更优）；移动端改为 scroll 避免滚动重绘掉帧 */
@media (min-width: 768px) {
  html, body { background-attachment: fixed; }
}