/* ==========================================================================
   CSS 变量与系统配置
   ========================================================================== */
:root {
  /* 颜色系统 */
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --card-bg: rgba(17, 24, 39, 0.7);
  --card-bg-hover: rgba(31, 41, 55, 0.8);
  --card-border: rgba(255, 255, 255, 0.06);
  --card-border-glow: rgba(6, 182, 212, 0.2);
  
  /* 荧光强调色 */
  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.4);
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  
  /* OBD 严重程度颜色 */
  --severity-low: #10b981;
  --severity-low-glow: rgba(16, 185, 129, 0.3);
  --severity-medium: #f97316;
  --severity-medium-glow: rgba(249, 115, 22, 0.3);
  --severity-high: #ef4444;
  --severity-high-glow: rgba(239, 68, 68, 0.3);
  --severity-critical: #d946ef;
  --severity-critical-glow: rgba(217, 70, 239, 0.3);

  /* 文字颜色 */
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --text-cyan: #22d3ee;

  /* 字体族 */
  --font-sans: 'Outfit', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, monospace;

  /* 阴影与圆角 */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-glow: 0 0 25px rgba(6, 182, 212, 0.15);
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   全局重置与滚动条
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(15, 23, 42, 0.8) 0%, transparent 50%),
    radial-gradient(circle at 90% 80%, rgba(8, 47, 73, 0.4) 0%, transparent 50%);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  line-height: 1.6;
}

/* 隐藏自带滚动条并设计极细碳黑滚动条 */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}

/* ==========================================================================
   头部 Header 状态栏
   ========================================================================== */
.app-header {
  height: 64px;
  padding: 0 24px;
  background: rgba(11, 15, 25, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-text {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 2px;
  background: linear-gradient(to right, #fff, var(--text-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.system-ver {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  border: 1px solid var(--text-muted);
  padding: 1px 6px;
  border-radius: 4px;
}

.glow-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  position: relative;
}
.status-online {
  background-color: var(--severity-low);
  box-shadow: 0 0 10px var(--severity-low);
}

.header-actions {
  display: flex;
  gap: 12px;
}

.icon-button {
  background: rgba(31, 41, 55, 0.5);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}
.icon-button:hover {
  color: var(--text-cyan);
  background: rgba(31, 41, 55, 0.8);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px var(--accent-cyan-glow);
  transform: translateY(-2px);
}

/* ==========================================================================
   侧边栏 Sidebar (历史记录与配置)
   ========================================================================== */
.app-sidebar {
  position: fixed;
  top: 0;
  right: 0;
  width: 360px;
  height: 100vh;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(15px);
  border-left: 1px solid var(--card-border);
  z-index: 101;
  padding: 24px;
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  transform: translateX(0);
}
.app-sidebar.hide {
  transform: translateX(100%);
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 12px;
}
.sidebar-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.8rem;
  cursor: pointer;
  line-height: 1;
}
.close-btn:hover {
  color: var(--severity-high);
}

.sidebar-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
}
.sidebar-pane.hide {
  display: none;
}

/* 历史列表样式 */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
  overflow-y: auto;
}

.history-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 14px;
  cursor: pointer;
  transition: var(--transition-smooth);
}
.history-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--accent-cyan);
  transform: translateX(-4px);
}

.history-item-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}
.history-item-code {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-cyan);
}
.history-item-severity {
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
}
.history-item-car {
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.history-item-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: right;
  margin-top: 6px;
}

.danger-button {
  width: 100%;
  padding: 12px;
  background: rgba(239, 68, 68, 0.1);
  color: var(--severity-high);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition-smooth);
  margin-top: auto;
}
.danger-button:hover {
  background: var(--severity-high);
  color: #fff;
}

/* ==========================================================================
   玻璃态卡片样式 (Glassmorphism Card)
   ========================================================================== */
.glass-card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.card-glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(to right, var(--accent-cyan), var(--accent-blue));
  opacity: 0.3;
}

.card-header-accent {
  padding: 28px 28px 10px 28px;
}
.card-header-accent h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 1px;
}
.subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 4px;
}

/* ==========================================================================
   阶段 1: 故障输入表单控制台 (Console View)
   ========================================================================== */
.main-layout {
  flex: 1;
  max-width: 1300px;
  width: 100%;
  margin: 0 auto;
  padding: 30px 20px;
  display: flex;
  flex-direction: column;
}

.panel-section {
  display: none;
  opacity: 0;
  transform: translateY(15px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.panel-section.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.main-form-card {
  padding: 30px;
}

.diagnostic-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 20px;
}

.form-row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.form-group {
  flex: 1;
  min-width: 200px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.code-row .form-group {
  min-width: 100%;
}

label {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}
label .required {
  color: var(--severity-high);
}

/* 输入框发光外框 */
.input-glow-wrapper {
  position: relative;
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.2);
}

.input-glow-wrapper input {
  font-size: 1.8rem;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-cyan);
  text-transform: uppercase;
  text-align: center;
  height: 64px;
}

.custom-input,
.custom-select,
.diagnostic-form input[type="text"],
.diagnostic-form input[type="number"],
.diagnostic-form textarea {
  width: 100%;
  padding: 14px 18px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-smooth);
}

.diagnostic-form input[type="text"]:focus,
.diagnostic-form input[type="number"]:focus,
.diagnostic-form textarea:focus {
  border-color: var(--accent-cyan);
  background: rgba(0, 0, 0, 0.35);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.15);
}

.input-glow-wrapper input:focus ~ .input-focus-border {
  opacity: 1;
  box-shadow: 0 0 20px var(--accent-cyan-glow);
}

.input-focus-border {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--accent-cyan);
  pointer-events: none;
  opacity: 0;
  transition: var(--transition-smooth);
}

.help-text {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 选项配置开关 */
.checkbox-group {
  flex-direction: row;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.checkbox-group input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent-cyan);
  cursor: pointer;
  margin-top: 2px;
}

.checkbox-label {
  display: flex;
  flex-direction: column;
  cursor: pointer;
}
.checkbox-label span {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* 快速代码测试标签 */
.quick-codes-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}
.quick-title {
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.quick-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.tag-btn {
  background: rgba(31, 41, 55, 0.4);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: 30px;
  font-size: 0.82rem;
  cursor: pointer;
  font-family: var(--font-mono);
  transition: var(--transition-smooth);
}
.tag-btn:hover {
  background: rgba(6, 182, 212, 0.08);
  border-color: var(--accent-cyan);
  color: var(--text-cyan);
}

/* 诊断大按钮 */
.submit-section {
  margin-top: 15px;
}

.btn-primary {
  width: 100%;
  height: 56px;
  border-radius: var(--radius-md);
  border: none;
  background: linear-gradient(135deg, #0284c7 0%, #06b6d4 100%);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 2px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(6, 182, 212, 0.4);
}
.btn-primary:active {
  transform: translateY(1px);
}

.btn-shine {
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.2) 50%,
    transparent 100%
  );
  transition: all 0.6s ease;
}
.btn-primary:hover .btn-shine {
  left: 100%;
}

.btn-secondary {
  padding: 10px 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition-smooth);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--text-secondary);
}

/* ==========================================================================
   阶段 2: 仿真 ECU 扫描过渡动画 (Scanning View)
   ========================================================================== */
.scanning-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  min-height: 480px;
  gap: 40px;
}

/* 旋转雷达环 */
.scanner-circle-box {
  width: 180px;
  height: 180px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.scanner-circle {
  border: 2px solid transparent;
  border-radius: 50%;
  position: absolute;
}
.circle-outer {
  width: 180px;
  height: 180px;
  border-top-color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
  animation: spin 3s linear infinite;
}
.circle-mid {
  width: 140px;
  height: 140px;
  border-left-color: var(--accent-blue);
  border-right-color: var(--accent-blue);
  animation: spin-reverse 2s linear infinite;
}
.circle-inner {
  width: 100px;
  height: 100px;
  border-top-color: var(--accent-purple);
  border-left-color: var(--accent-purple);
  animation: spin 1.5s linear infinite;
}

.scanner-radar-line {
  position: absolute;
  width: 90px;
  height: 2px;
  background: linear-gradient(to right, transparent, var(--text-cyan));
  transform-origin: left center;
  top: 50%;
  left: 50%;
  animation: scan-radar 2s linear infinite;
}

.scanner-center-text {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-cyan);
  animation: text-pulse 1s ease-in-out infinite alternate;
}

.scanning-info {
  width: 100%;
  max-width: 500px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.scanning-title {
  text-align: center;
  font-size: 1.3rem;
  font-weight: 600;
}
.glow-text {
  text-shadow: 0 0 10px rgba(6, 182, 212, 0.5);
}

/* 进度条 */
.progress-bar-container {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
}
.progress-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(to right, var(--accent-blue), var(--accent-cyan));
  border-radius: 10px;
  box-shadow: 0 0 10px var(--accent-cyan);
  transition: width 0.1s ease;
}

/* 诊断控制台日志 */
.scanning-terminal-logs {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 16px;
  height: 140px;
  overflow-y: auto;
}
.scanning-terminal-logs ul {
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.scanning-terminal-logs li {
  color: var(--text-secondary);
}
.scanning-terminal-logs li.log-success {
  color: var(--severity-low);
}
.scanning-terminal-logs li.log-active {
  color: var(--text-cyan);
}

/* ==========================================================================
   阶段 3: 诊断报告面板 (Dashboard View)
   ========================================================================== */
.dashboard-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 24px;
}

.dashboard-left {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* 左侧报告卡 */
.report-card {
  min-height: 520px;
  display: flex;
  flex-direction: column;
}

.report-header {
  padding: 24px 28px;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.header-main-info {
  display: flex;
  align-items: center;
  gap: 20px;
}

.dtc-code-badge {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 15px var(--accent-cyan-glow);
  padding: 4px 18px;
  border-radius: var(--radius-md);
  letter-spacing: 1px;
}

.title-wrap {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.title-wrap h2 {
  font-size: 1.25rem;
  font-weight: 700;
}
.category-tag {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 严重程度徽章 */
.severity-glow-container {
  display: flex;
}
.severity-badge {
  padding: 6px 14px;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  border: 1px solid transparent;
}
.severity-low {
  background: rgba(16, 185, 129, 0.1);
  color: var(--severity-low);
  border-color: var(--severity-low);
  box-shadow: 0 0 12px var(--severity-low-glow);
}
.severity-medium {
  background: rgba(249, 115, 22, 0.1);
  color: var(--severity-medium);
  border-color: var(--severity-medium);
  box-shadow: 0 0 12px var(--severity-medium-glow);
}
.severity-high {
  background: rgba(239, 68, 68, 0.1);
  color: var(--severity-high);
  border-color: var(--severity-high);
  box-shadow: 0 0 12px var(--severity-high-glow);
}
.severity-critical {
  background: rgba(217, 70, 239, 0.1);
  color: var(--severity-critical);
  border-color: var(--severity-critical);
  box-shadow: 0 0 12px var(--severity-critical-glow);
}

/* 标签页 Tab 导航 */
.report-tabs {
  background: rgba(0, 0, 0, 0.15);
  display: flex;
  padding: 6px;
  gap: 6px;
  border-bottom: 1px solid var(--card-border);
}
.report-tabs .tab-btn {
  flex: 1;
  background: none;
  border: none;
  padding: 12px 6px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-smooth);
}
.report-tabs .tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.03);
}
.report-tabs .tab-btn.active {
  color: var(--text-cyan);
  background: rgba(6, 182, 212, 0.08);
  font-weight: 600;
}

/* 标签页内容面板 */
.tab-content {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.tab-panel {
  display: none;
}
.tab-panel.active {
  display: block;
  animation: fade-in 0.3s ease-out;
}

/* 诊断概述 */
.overview-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.overview-section h3 {
  font-size: 1.05rem;
  font-weight: 600;
  border-left: 3px solid var(--accent-cyan);
  padding-left: 10px;
}
.lead-text {
  font-size: 1rem;
  color: var(--text-primary);
  line-height: 1.7;
}

.warning-alert-box {
  background: rgba(249, 115, 22, 0.05);
  border: 1px solid rgba(249, 115, 22, 0.15);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  gap: 14px;
}
.alert-icon {
  font-size: 1.3rem;
  line-height: 1;
}
.alert-body {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}
.alert-body strong {
  color: var(--severity-medium);
  display: block;
  margin-bottom: 2px;
}

/* 症状与成因布局 */
.symptoms-causes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.column-box {
  background: rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-md);
  padding: 20px;
}

.icon-title {
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}
.title-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  box-shadow: 0 0 8px currentColor;
}
.title-dot.yellow { color: var(--severity-medium); background-color: var(--severity-medium); }
.title-dot.red { color: var(--severity-high); background-color: var(--severity-high); }

.styled-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.styled-list li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  position: relative;
  padding-left: 20px;
}
.styled-list li::before {
  content: "✦";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent-cyan);
}

/* 解决方案 Checklist */
.solutions-section h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.section-tip {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.todo-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.todo-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  transition: var(--transition-smooth);
}
.todo-checklist li:hover {
  background: rgba(255, 255, 255, 0.04);
}

.todo-checklist input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent-cyan);
  cursor: pointer;
  margin-top: 2px;
  flex-shrink: 0;
}

.todo-checklist input[type="checkbox"]:checked + span {
  text-decoration: line-through;
  color: var(--text-muted);
}

.todo-text {
  font-size: 0.92rem;
  color: var(--text-primary);
  line-height: 1.5;
}

/* 规格明细表格 */
.meta-table-box {
  display: flex;
  flex-direction: column;
  gap: 24px;
  flex: 1;
}

.meta-table {
  width: 100%;
  border-collapse: collapse;
}
.meta-table th,
.meta-table td {
  padding: 14px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.9rem;
}
.meta-table th {
  color: var(--text-secondary);
  font-weight: 500;
  width: 35%;
}
.meta-table td {
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.actions-group-footer {
  margin-top: auto;
  display: flex;
  justify-content: flex-end;
}

/* ==========================================================================
   右侧: AI 诊断技术专家终端 (Dialogue Pane)
   ========================================================================== */
.chat-card {
  height: 520px;
  display: flex;
  flex-direction: column;
}

.chat-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chat-header-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar-glow {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #7c3aed, #2563eb);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
  color: #fff;
  box-shadow: 0 0 12px rgba(124, 58, 237, 0.4);
}

.chat-title-group h3 {
  font-size: 0.95rem;
  font-weight: 600;
}
.chat-status {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.status-dot {
  width: 6px;
  height: 6px;
  background-color: var(--severity-low);
  border-radius: 50%;
}
.status-dot.pulsing {
  animation: dot-pulse 1.2s infinite alternate;
}

.clear-chat-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
  border-radius: 4px;
  transition: var(--transition-smooth);
}
.clear-chat-btn:hover {
  color: var(--severity-high);
  background: rgba(255, 255, 255, 0.05);
}

/* 消息流区域 */
.chat-messages {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: rgba(0, 0, 0, 0.15);
}

/* 消息泡泡 */
.msg-bubble-wrap {
  display: flex;
  flex-direction: column;
  max-width: 85%;
}

.msg-bubble-wrap.system {
  align-self: flex-start;
}
.msg-bubble-wrap.user {
  align-self: flex-end;
}

.msg-info {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  padding: 0 6px;
}
.msg-bubble-wrap.user .msg-info {
  text-align: right;
}

.msg-bubble {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  line-height: 1.5;
  word-break: break-word;
}

.system .msg-bubble {
  background: rgba(31, 41, 55, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
  border-top-left-radius: 2px;
}

/* 针对 Markdown 渲染优化 */
.system .msg-bubble p {
  margin-bottom: 8px;
}
.system .msg-bubble p:last-child {
  margin-bottom: 0;
}
.system .msg-bubble ul, .system .msg-bubble ol {
  padding-left: 20px;
  margin-bottom: 8px;
}
.system .msg-bubble li {
  margin-bottom: 4px;
}
.system .msg-bubble strong {
  color: var(--text-cyan);
}

.user .msg-bubble {
  background: var(--accent-cyan);
  color: #fff;
  border-top-right-radius: 2px;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.15);
}

/* 消息加载动画 */
.loading-bubble {
  display: flex;
  gap: 4px;
  padding: 8px 12px;
  background: rgba(31, 41, 55, 0.6);
  border-radius: var(--radius-md);
  width: fit-content;
  border-top-left-radius: 2px;
}
.dot-bounce {
  width: 6px;
  height: 6px;
  background: var(--text-cyan);
  border-radius: 50%;
  animation: bounce 1.4s infinite ease-in-out both;
}
.dot-bounce:nth-child(1) { animation-delay: -0.32s; }
.dot-bounce:nth-child(2) { animation-delay: -0.16s; }

/* 输入区 */
.chat-input-form {
  padding: 16px;
  border-top: 1px solid var(--card-border);
}
.input-container {
  display: flex;
  gap: 10px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 6px;
  align-items: center;
  transition: var(--transition-smooth);
}
.input-container:focus-within {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.1);
}

.input-container input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  padding: 8px 12px;
}
.input-container input::placeholder {
  color: var(--text-muted);
}

.btn-send {
  background: var(--accent-cyan);
  border: none;
  color: #fff;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}
.btn-send:hover {
  background: var(--accent-blue);
  transform: scale(1.05);
}
.btn-send:disabled {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  cursor: not-allowed;
  transform: none;
}

/* ==========================================================================
   关键帧动画系统 (Keyframe Animations)
   ========================================================================== */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes spin-reverse {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}
@keyframes scan-radar {
  from { transform: rotate(0deg) translateY(-50%); }
  to { transform: rotate(360deg) translateY(-50%); }
}

@keyframes text-pulse {
  from { opacity: 0.5; filter: blur(0.5px); }
  to { opacity: 1; filter: drop-shadow(0 0 4px var(--accent-cyan)); }
}

@keyframes dot-pulse {
  from { transform: scale(1); opacity: 0.6; }
  to { transform: scale(1.2); opacity: 1; box-shadow: 0 0 8px var(--severity-low); }
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1.0); }
}

/* ==========================================================================
   响应式断点设计 (Mobile & PC Adaption)
   ========================================================================== */

/* 平板与手机端布局 (iPad & Mobile) */
@media (max-width: 968px) {
  .dashboard-grid {
    grid-template-columns: 1fr; /* 纵向单列排布 */
    gap: 24px;
  }
  
  .dashboard-left {
    order: 1; /* 诊断卡放在上方 */
  }

  .dashboard-right {
    order: 2; /* AI 聊天窗口放在下方 */
  }

  .chat-card {
    height: 700px; /* 将移动端/平板对话终端高度从 520px 扩展至 700px，大幅提升长内容阅读体验 */
  }

  .symptoms-causes-grid {
    grid-template-columns: 1fr; /* 症状和原因垂直折叠 */
  }

  .app-sidebar {
    width: 100%; /* 侧边栏全屏展示 */
  }
}

/* 小屏手机端细节调整 */
@media (max-width: 576px) {
  body {
    background-image: radial-gradient(circle at 50% 10%, rgba(15, 23, 42, 0.95) 0%, #0b0f19 100%);
  }

  .main-layout {
    padding: 15px 12px;
  }

  .main-form-card {
    padding: 20px 15px;
  }

  .card-header-accent {
    padding: 10px 0;
  }

  .dtc-code-badge {
    font-size: 1.5rem;
    padding: 2px 10px;
  }

  .report-header {
    padding: 16px;
  }

  .report-tabs {
    flex-wrap: wrap; /* tab 宽度不够时自动换行 */
  }

  .report-tabs .tab-btn {
    font-size: 0.82rem;
    padding: 8px 4px;
  }

  .tab-content {
    padding: 16px;
  }

  .todo-checklist li {
    padding: 10px;
  }
}