/* 火灾逃生训练营 — 全局样式 */
:root {
  --bg-primary: #1A2235;
  --bg-secondary: #222C42;
  --card-bg: rgba(34, 44, 66, 0.8);
  --card-border: rgba(255, 255, 255, 0.15);
  --card-border-hover: rgba(255, 168, 0, 0.5);
  --text-primary: #F0F4FF;
  --text-secondary: rgba(240, 244, 255, 0.75);
  --safety-orange: #FF8800;
  --safety-orange-glow: #FFA800;
  --life-green: #00FF88;
  --alert-red: #FF2D55;
  --shadow-glow: 0 0 30px rgba(255, 168, 0, 0.12);
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* 导航栏 */
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  height: 64px;
  background: rgba(16, 22, 40, 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 800;
}

.logo-icon { font-size: 24px; }

.nav-links {
  display: flex;
  gap: 4px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition-smooth);
}

.nav-link:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.nav-link.active { color: var(--safety-orange); background: rgba(255,168,0,0.08); }

.nav-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.online { background: var(--life-green); box-shadow: 0 0 8px rgba(0,255,136,0.5); }

/* 主容器 */
.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 60px;
}

/* 标签 */
.tag-orange { background: rgba(255,168,0,0.1); color: var(--safety-orange); }
.tag-green { background: rgba(0,255,136,0.1); color: var(--life-green); }
.tag-red { background: rgba(255,45,85,0.1); color: var(--alert-red); }
.tag-blue { background: rgba(0,212,255,0.1); color: #00D4FF; }

/* 页面标题 */
.page-header {
  padding: 40px 0 24px;
}

.page-header h1 {
  font-size: 32px;
  font-weight: 900;
  margin-bottom: 8px;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 14px;
}

/* 卡片通用 */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 20px;
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--safety-orange), var(--safety-orange-glow));
  color: #0A0E1A;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(255,168,0,0.3);
}

.btn-secondary {
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
  border: 1px solid var(--card-border);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--card-border-hover);
}

.btn-success {
  background: linear-gradient(135deg, #00CC66, var(--life-green));
  color: #0A0E1A;
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(0,255,136,0.3);
}

/* 进度条 */
.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255,255,255,0.08);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s ease;
}

/* 徽章 */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 700;
}

.badge-gold { background: rgba(255,200,0,0.15); color: #FFC800; border: 1px solid rgba(255,200,0,0.3); }
.badge-silver { background: rgba(200,200,220,0.15); color: #C8C8DC; border: 1px solid rgba(200,200,220,0.3); }
.badge-bronze { background: rgba(255,168,0,0.15); color: #FFA800; border: 1px solid rgba(255,168,0,0.3); }

/* 响应式 — 手机端优化 */
/* 中等屏幕 — 平板 */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: 1fr 1fr !important; gap: 14px !important; }
  .hero-title { font-size: 36px !important; }
  .hero-icon { font-size: 56px !important; }
  .hero-section { padding: 40px 0 30px !important; }
  .feature-card { padding: 22px 16px !important; }
  .progress-grid { grid-template-columns: 1fr 1fr !important; gap: 12px !important; }
}

@media (max-width: 768px) {
  .nav-bar {
    padding: 0 12px;
    height: auto;
    min-height: 52px;
    flex-wrap: nowrap;
    gap: 4px;
  }
  .nav-logo { font-size: 14px; gap: 6px; }
  .nav-logo .logo-icon { font-size: 18px; }
  .nav-links { gap: 2px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .nav-link {
    padding: 6px 10px;
    font-size: 12px;
    white-space: nowrap;
  }
  .nav-status span:last-child { display: none; }
  .nav-status .status-dot { width: 6px; height: 6px; }

  .main-container { padding: 0 12px 40px; }
  .page-header { padding: 24px 0 16px; }
  .page-header h1 { font-size: 22px; }
  .page-header p { font-size: 13px; }
  .card { padding: 16px; border-radius: 12px; }
  .card-title { font-size: 14px; margin-bottom: 12px; }

  .hero-section { padding: 32px 0 24px; }
  .hero-title { font-size: 28px !important; }
  .hero-sub { font-size: 14px !important; margin-bottom: 20px !important; }
  .hero-icon { font-size: 48px !important; }
  .hero-badge { font-size: 10px; padding: 4px 12px; }

  .feature-grid { grid-template-columns: 1fr 1fr !important; gap: 10px !important; }
  .feature-card { padding: 16px 12px !important; border-radius: 12px !important; }
  .feature-icon { font-size: 28px !important; margin-bottom: 8px !important; }
  .feature-name { font-size: 13px !important; }
  .feature-desc { font-size: 11px !important; }
  .feature-tag { font-size: 9px !important; padding: 2px 8px !important; margin-top: 8px !important; }

  .progress-grid { grid-template-columns: 1fr 1fr !important; gap: 10px !important; }
  .progress-item { padding: 14px !important; }
  .progress-item .p-icon { font-size: 22px !important; }
  .progress-item .p-label { font-size: 11px !important; }
  .progress-item .p-score { font-size: 20px !important; }

  .safety-tip { padding: 16px !important; margin-top: 20px !important; }
  .safety-tip .tip-text { font-size: 15px !important; }
  .safety-tip .tip-sub { font-size: 12px !important; }

  .equip-grid { grid-template-columns: 1fr 1fr !important; gap: 10px !important; }
  .equip-card { padding: 16px !important; }
  .equip-card .e-icon { width: 36px !important; height: 36px !important; }
  .equip-card .e-icon svg { width: 36px !important; height: 36px !important; }
  .equip-card .e-name { font-size: 14px !important; }
  .equip-card .e-desc { font-size: 12px !important; }

  .scene-selector { flex-direction: column !important; gap: 8px !important; }
  .scene-btn { padding: 12px !important; font-size: 13px !important; }
  .step-item { padding: 12px 14px !important; gap: 10px !important; }
  .step-item .step-text { font-size: 13px !important; }
  .step-item .step-action { font-size: 12px !important; }

  .firstaid-tabs { gap: 4px !important; }
  .fa-tab { padding: 6px 12px !important; font-size: 12px !important; }
  .fa-header .fa-icon { font-size: 36px !important; }
  .fa-header .fa-title { font-size: 18px !important; }

  .quiz-question { font-size: 17px !important; }
  .quiz-opt { padding: 12px 14px !important; font-size: 14px !important; }
  .quiz-opt .opt-letter { width: 28px !important; height: 28px !important; font-size: 12px !important; }
  .result-screen .result-score { font-size: 42px !important; }
  .result-stats { gap: 24px !important; }
  .result-stats .rs-num { font-size: 22px !important; }

  .btn { padding: 8px 16px !important; font-size: 13px !important; }
}

@media (max-width: 480px) {
  .nav-bar { padding: 0 8px; min-height: 48px; }
  .nav-logo { font-size: 12px; }
  .nav-link { padding: 4px 6px; font-size: 11px; }
  .nav-status { display: none; }

  .main-container { padding: 0 8px 32px; }
  .page-header h1 { font-size: 20px; }
  .card { padding: 12px; border-radius: 10px; }

  .feature-grid { grid-template-columns: 1fr !important; gap: 8px !important; }
  .feature-card { padding: 14px 12px !important; }
  .feature-icon { font-size: 24px !important; }

  .progress-grid { grid-template-columns: 1fr 1fr !important; gap: 8px !important; }
  .progress-item { padding: 10px !important; }

  .equip-grid { grid-template-columns: 1fr !important; }

  .hero-title { font-size: 24px !important; }
  .hero-icon { font-size: 40px !important; }

  .quiz-question { font-size: 15px !important; }
  .quiz-opt { padding: 10px 12px !important; font-size: 13px !important; }
}