/* ===== 基础重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --warning: #f59e0b;
  --success: #10b981;
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #273548;
  --bg-alt: #1a2236;
  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --border: #334155;
  --border-light: #475569;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --transition: 0.2s ease;
}

html { scroll-behavior: auto; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; font-family: inherit; }
input, select, textarea { font-family: inherit; }

/* ===== 导航栏 ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.nav-inner {
  max-width: 1400px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px;
}
.logo {
  font-size: 20px; font-weight: 700;
  background: linear-gradient(135deg, var(--primary), #6366f1);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  color: var(--text-secondary); font-size: 14px; font-weight: 500;
  transition: var(--transition);
}
.nav-links a:hover { color: var(--text); }

.hamburger { display: none; background: none; color: var(--text); font-size: 24px; padding: 4px; }

.mobile-menu {
  display: none; position: fixed; top: 57px; left: 0; right: 0;
  background: var(--bg-card); border-bottom: 1px solid var(--border);
  padding: 16px 20px; z-index: 999; flex-direction: column; gap: 12px;
}
.mobile-menu.active { display: flex; }
.mobile-menu a { color: var(--text-secondary); font-size: 15px; padding: 8px 0; }

/* ===== 地图+Hero 融合区 ===== */
.map-hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
}

/* 地图背景层 */
.map-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
  transition: transform 1s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.map-hero-bg .leaflet-container {
  height: 100% !important;
  width: 100% !important;
  background: var(--bg);
}

/* Hero 覆盖层 */
.map-hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: 
    radial-gradient(ellipse at 50% 40%, rgba(15,23,42,0.6) 0%, rgba(15,23,42,0.85) 60%, rgba(15,23,42,0.95) 100%),
    linear-gradient(180deg, rgba(15,23,42,0.7) 0%, rgba(15,23,42,0.9) 100%);
  backdrop-filter: blur(2px);
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

.hero-content {
  max-width: 780px;
  padding: 0 20px;
}

.hero-badge {
  display: inline-block;
  background: rgba(37,99,235,0.2);
  border: 1px solid rgba(37,99,235,0.4);
  padding: 6px 18px;
  border-radius: 20px;
  font-size: 13px;
  color: var(--primary);
  margin-bottom: 24px;
  transition: all 0.8s ease;
}

.hero-content h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  color: #fff;
}
.hero-content h1 .hl-word {
  display: block;
  transition: all 0.8s ease;
}

.hero-content p {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 36px;
  transition: all 0.8s ease;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-bottom: 36px;
  transition: all 0.8s ease;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 38px;
  font-weight: 800;
  color: var(--primary);
  display: block;
  transition: all 0.8s ease;
}
.stat-label { font-size: 14px; color: var(--text-secondary); margin-top: 4px; }

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  transition: all 0.8s ease;
}

/* 下滑提示 */
.scroll-hint {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 13px;
  transition: opacity 0.6s ease;
  z-index: 3;
}
.scroll-arrow {
  width: 20px; height: 20px;
  border-right: 2px solid var(--text-secondary);
  border-bottom: 2px solid var(--text-secondary);
  transform: rotate(45deg);
  animation: scrollBounce 2s infinite;
}
@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translate(0,0); }
  50% { transform: rotate(45deg) translate(4px,4px); }
}

/* ---- 消散状态 ---- */
.map-hero.dissolved .map-hero-overlay {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.map-hero.dissolved .hero-badge,
.map-hero.dissolved .hero-content p,
.map-hero.dissolved .hero-stats,
.map-hero.dissolved .hero-btns,
.map-hero.dissolved .scroll-hint {
  opacity: 0;
  transform: translateY(-30px);
}
.map-hero.dissolved .hero-content h1 .hl-word {
  opacity: 0;
  transform: translateY(-40px);
  filter: blur(10px);
}
/* 第一行先消散 */
.map-hero.dissolved .hero-content h1 .hl-word:first-child {
  transition-delay: 0s;
}
/* 第二行稍慢 */
.map-hero.dissolved .hero-content h1 .hl-word:last-child {
  transition-delay: 0.15s;
}

/* 地图推进效果 */
.map-hero.dissolved .map-hero-bg {
  transform: scale(1.0);
}

/* ===== 地图控件栏（消散后显示） ===== */
.map-controls-bar {
  position: absolute;
  top: 70px;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: rgba(15,23,42,0.7);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-20px);
  transition: all 0.6s ease 0.3s;
}
.map-hero.dissolved .map-controls-bar {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.map-search input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  width: 240px;
  font-size: 13px;
  outline: none;
  transition: var(--transition);
}
.map-search input:focus { border-color: var(--primary); }

.map-filters { display: flex; gap: 6px; flex-wrap: wrap; }
.filter-btn {
  padding: 5px 12px;
  border-radius: 16px;
  font-size: 12px;
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.filter-btn.active, .filter-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.map-legend {
  display: flex;
  gap: 14px;
  font-size: 12px;
  color: var(--text-secondary);
  margin-left: auto;
}
.legend-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 3px;
  vertical-align: middle;
}
.legend-dot.safe { background: var(--success); }
.legend-dot.medium { background: var(--warning); }
.legend-dot.high { background: var(--danger); }
.legend-cross {
  width: 10px; height: 10px;
  display: inline-block;
  margin-right: 3px;
  vertical-align: middle;
  position: relative;
}
.legend-cross::before, .legend-cross::after {
  content: '';
  position: absolute;
  background: #6b7280;
  top: 0; left: 4px;
  width: 2px; height: 10px;
  border-radius: 1px;
}
.legend-cross::before { transform: rotate(45deg); }
.legend-cross::after { transform: rotate(-45deg); }

/* 案例标记 */
.case-marker-icon { cursor: pointer !important; }
.case-marker-icon > div { pointer-events: auto !important; }

/* Leaflet 弹窗 */
.leaflet-popup-close-button {
  color: #fff !important;
  font-size: 20px !important;
  font-weight: bold !important;
  top: 6px !important;
  right: 10px !important;
  z-index: 9999 !important;
  cursor: pointer !important;
  opacity: 0.8 !important;
}
.leaflet-popup-close-button:hover { opacity: 1 !important; color: #fff !important; }
.map-hero-bg .leaflet-control-zoom a {
  background: var(--bg-card);
  color: var(--text);
  border-color: var(--border);
}
.leaflet-popup-content-wrapper {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
}
.leaflet-popup-tip { background: var(--bg-card); }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(37,99,235,0.4);
}
.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-outline:hover {
  border-color: var(--text-secondary);
  background: rgba(255,255,255,0.05);
}
.btn-lg { padding: 14px 32px; font-size: 16px; }

/* ===== 通用区块 ===== */
.section { padding: 80px 20px; max-width: 1200px; margin: 0 auto; }
.section-alt { background: var(--bg-alt); max-width: 100%; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 32px; font-weight: 700; margin-bottom: 8px; }
.section-header p { color: var(--text-secondary); font-size: 16px; }

/* ===== 攻略卡片 ===== */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.guide-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  cursor: pointer;
  transition: var(--transition);
}
.guide-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.guide-icon { font-size: 36px; margin-bottom: 16px; }
.guide-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.guide-card p { font-size: 14px; color: var(--text-secondary); margin-bottom: 16px; line-height: 1.6; }
.guide-link { font-size: 14px; color: var(--primary); font-weight: 500; }

/* ===== 检测步骤 ===== */
.check-steps { max-width: 720px; margin: 0 auto; }
.check-step {
  display: flex; gap: 20px; padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.check-step:last-child { border-bottom: none; }
.step-num {
  font-size: 32px; font-weight: 800; color: var(--primary);
  min-width: 60px; line-height: 1;
}
.step-content h3 { font-size: 18px; font-weight: 600; margin-bottom: 6px; }
.step-content p { color: var(--text-secondary); font-size: 15px; line-height: 1.7; }

/* ===== 举报表单 ===== */
.report-container {
  max-width: 900px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 300px; gap: 32px;
}
.report-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block; font-size: 14px; font-weight: 500;
  margin-bottom: 6px; color: var(--text-secondary);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  outline: none;
  transition: var(--transition);
  resize: vertical;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--primary); }

.risk-selector { display: flex; gap: 16px; flex-wrap: wrap; }
.risk-option {
  display: flex; align-items: center; gap: 6px;
  font-size: 14px; cursor: pointer; color: var(--text-secondary);
}
.report-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.report-info h3 { font-size: 16px; margin-bottom: 12px; }
.report-info ul { list-style: none; }
.report-info li {
  font-size: 14px; color: var(--text-secondary);
  padding: 6px 0; border-bottom: 1px solid var(--border);
}
.report-info li:last-child { border-bottom: none; }
.report-info li::before { content: "✓ "; color: var(--success); }
.emergency-call {
  margin-top: 16px; padding: 12px; text-align: center;
  background: rgba(220,38,38,0.15);
  border: 1px solid rgba(220,38,38,0.3);
  border-radius: var(--radius-sm);
  font-size: 15px;
}
.emergency-call strong { color: var(--danger); }

/* ===== 弹窗 ===== */
.modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,0.7); backdrop-filter: blur(4px);
  align-items: center; justify-content: center; padding: 20px;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 640px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
}
.modal-body { padding: 32px; }
.modal-close {
  position: absolute; top: 12px; right: 16px;
  background: none; color: var(--text-secondary);
  font-size: 24px; padding: 4px 8px; z-index: 1;
}
.modal-close:hover { color: var(--text); }

/* ===== Toast ===== */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--success); color: #fff;
  padding: 12px 24px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500; z-index: 3000;
  opacity: 0; transition: opacity 0.3s;
}
.toast.show { opacity: 1; }

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 48px 20px 24px;
}
.footer-content {
  max-width: 1200px; margin: 0 auto;
  display: flex; justify-content: space-between;
  gap: 40px; flex-wrap: wrap;
}
.footer-brand p {
  color: var(--text-secondary);
  font-size: 14px; margin-top: 8px; max-width: 300px;
}
.footer-links { display: flex; gap: 64px; }
.footer-col h4 { font-size: 14px; margin-bottom: 12px; }
.footer-col a {
  display: block; font-size: 14px;
  color: var(--text-secondary);
  padding: 4px 0; transition: var(--transition);
}
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  max-width: 1200px; margin: 32px auto 0;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
}
.footer-bottom p { margin-top: 4px; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: block; }

  .hero-content h1 { font-size: 32px; }
  .hero-stats { gap: 24px; }
  .stat-num { font-size: 28px; }

  .map-controls-bar {
    flex-direction: column;
    padding: 10px 14px;
    gap: 8px;
  }
  .map-search input { width: 100%; }
  .map-legend { margin-left: 0; }

  .report-container { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-content { flex-direction: column; gap: 24px; }
  .footer-links { gap: 40px; }
  .guide-grid { grid-template-columns: 1fr; }
  .check-step { flex-direction: column; gap: 8px; }
  .risk-selector { flex-direction: column; }
}