/* ================================================================
   跨境物流综合平台 - 主样式表
   Modern Professional Design - Logistics / Supply Chain Theme
   ================================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --primary: #1a3a5c;
  --primary-light: #2563eb;
  --primary-dark: #0f2440;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-dark: #0f172a;
  --text: #1e293b;
  --text-light: #64748b;
  --text-inverse: #f8fafc;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.2s ease;
  --max-width: 1280px;
  --nav-height: 64px;
  --font: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-height); }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Navigation ---------- */
.nav { 
  position: sticky; top: 0; z-index: 1000; 
  background: rgba(255,255,255,0.95); 
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-height);
  display: flex; align-items: center;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.nav-inner {
  max-width: var(--max-width); margin: 0 auto;
  width: 100%; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  font-size: 1.25rem; font-weight: 700; color: var(--primary);
  display: flex; align-items: center; gap: 8px;
  text-decoration: none;
}
.nav-logo .icon { font-size: 1.5rem; }
.nav-links { display: flex; gap: 4px; list-style: none; flex-wrap: wrap; }
.nav-links a {
  text-decoration: none; color: var(--text-light); padding: 8px 14px;
  border-radius: 6px; font-size: 0.875rem; font-weight: 500;
  transition: var(--transition); white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary-light); background: #eff6ff; }
.nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--text); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, #1e4d7b 100%);
  color: var(--text-inverse); padding: 80px 24px 60px;
  text-align: center; position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-content { position: relative; z-index: 1; max-width: 800px; margin: 0 auto; }
.hero h1 { font-size: 2.75rem; font-weight: 800; margin-bottom: 16px; letter-spacing: -0.5px; }
.hero p { font-size: 1.125rem; opacity: 0.9; margin-bottom: 32px; line-height: 1.8; }
.hero-badges { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-badge {
  background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.2);
  padding: 10px 20px; border-radius: 50px; font-size: 0.875rem;
  backdrop-filter: blur(4px);
}

/* ---------- Sections ---------- */
.section { padding: 60px 24px; }
.section-alt { background: var(--bg); }
.section-inner { max-width: var(--max-width); margin: 0 auto; }
.section-title {
  font-size: 1.75rem; font-weight: 700; color: var(--primary);
  margin-bottom: 8px; display: flex; align-items: center; gap: 10px;
}
.section-title .emoji { font-size: 1.5rem; }
.section-subtitle { color: var(--text-light); margin-bottom: 32px; font-size: 1rem; }
.section-divider {
  width: 60px; height: 4px; background: var(--accent);
  border-radius: 2px; margin-bottom: 32px;
}

/* ---------- Search Bar ---------- */
.search-bar {
  display: flex; gap: 12px; margin-bottom: 24px;
  flex-wrap: wrap; align-items: center;
}
.search-bar input {
  flex: 1; min-width: 240px; padding: 12px 16px;
  border: 2px solid var(--border); border-radius: var(--radius);
  font-size: 0.95rem; font-family: var(--font);
  transition: var(--transition); background: var(--bg-card);
}
.search-bar input:focus { outline: none; border-color: var(--primary-light); box-shadow: 0 0 0 3px rgba(37,99,235,0.1); }
.search-bar select {
  padding: 12px 16px; border: 2px solid var(--border); border-radius: var(--radius);
  font-size: 0.95rem; font-family: var(--font); background: var(--bg-card);
  cursor: pointer;
}
.search-bar select:focus { outline: none; border-color: var(--primary-light); }

/* ---------- Tabs ---------- */
.tabs { display: flex; gap: 4px; margin-bottom: 20px; flex-wrap: wrap; border-bottom: 2px solid var(--border); }
.tab {
  padding: 10px 20px; border: none; background: transparent;
  font-size: 0.9rem; font-weight: 500; cursor: pointer;
  color: var(--text-light); font-family: var(--font);
  border-bottom: 2px solid transparent; margin-bottom: -2px;
  transition: var(--transition); white-space: nowrap;
}
.tab:hover { color: var(--primary-light); }
.tab.active { color: var(--primary-light); border-bottom-color: var(--primary-light); }

/* ---------- Cards ---------- */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px;
  box-shadow: var(--shadow); transition: var(--transition);
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-1px); }
.card h4 { font-size: 1rem; color: var(--primary); margin-bottom: 8px; }
.card .meta { font-size: 0.8rem; color: var(--text-light); margin-bottom: 4px; }
.card .address { font-size: 0.85rem; color: var(--text); margin-bottom: 6px; }
.card .tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.tag {
  display: inline-block; padding: 3px 10px; border-radius: 50px;
  font-size: 0.75rem; font-weight: 500;
}
.tag-blue { background: #dbeafe; color: #1e40af; }
.tag-green { background: #dcfce7; color: #166534; }
.tag-amber { background: #fef3c7; color: #92400e; }
.tag-purple { background: #f3e8ff; color: #6b21a8; }
.tag-red { background: #fee2e2; color: #991b1b; }

.cards-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px; margin-top: 16px;
}

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--border); box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; font-size: 0.875rem; background: var(--bg-card); }
thead { background: var(--primary); color: var(--text-inverse); }
th { padding: 14px 16px; text-align: left; font-weight: 600; white-space: nowrap; }
td { padding: 12px 16px; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #f1f5f9; }
tbody tr:nth-child(even) { background: #f8fafc; }
tbody tr:nth-child(even):hover { background: #f1f5f9; }

/* ---------- Transport Cards ---------- */
.transport-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px;
  box-shadow: var(--shadow); transition: var(--transition);
}
.transport-card:hover { box-shadow: var(--shadow-lg); }
.transport-card h3 { font-size: 1.15rem; color: var(--primary); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.transport-card .carrier-info { font-size: 0.85rem; color: var(--text-light); margin-bottom: 10px; }
.transport-card .transit { background: #eff6ff; padding: 6px 12px; border-radius: 6px; display: inline-block; font-size: 0.85rem; margin-bottom: 12px; }
.transport-card .cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 12px; }
.transport-card .col h5 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; }
.transport-card .col.suitable h5 { color: #166534; }
.transport-card .col.unsuitable h5 { color: #991b1b; }
.transport-card .col ul { list-style: none; font-size: 0.8rem; line-height: 1.8; }
.transport-card .col.suitable ul li::before { content: "✅ "; }
.transport-card .col.unsuitable ul li::before { content: "❌ "; }

/* Cost Badge */
.cost-badge {
  display: inline-block; padding: 4px 12px; border-radius: 50px;
  font-size: 0.75rem; font-weight: 600; margin-left: 8px;
}
.cost-high { background: #fee2e2; color: #991b1b; }
.cost-medium { background: #fef3c7; color: #92400e; }
.cost-low { background: #dcfce7; color: #166534; }

/* ---------- Accordion / Risk Items ---------- */
.risk-group { margin-bottom: 24px; }
.risk-group h3 {
  font-size: 1.1rem; color: var(--primary); margin-bottom: 12px;
  padding-bottom: 8px; border-bottom: 2px solid var(--border);
  display: flex; align-items: center; gap: 8px;
}
.risk-list { list-style: none; display: grid; gap: 8px; }
.risk-list li {
  padding: 10px 16px; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius);
  font-size: 0.9rem; line-height: 1.6;
  display: flex; align-items: flex-start; gap: 10px;
}
.risk-list li::before { content: "⚠️"; flex-shrink: 0; }

/* ---------- News Cards ---------- */
.news-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 20px; }
.news-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px;
  box-shadow: var(--shadow); transition: var(--transition);
  display: flex; flex-direction: column;
}
.news-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.news-card .news-meta { display: flex; gap: 12px; margin-bottom: 10px; font-size: 0.75rem; }
.news-card .news-date { color: var(--text-light); }
.news-card .news-source { 
  background: #eff6ff; color: var(--primary-light); padding: 2px 8px;
  border-radius: 4px; font-weight: 500;
}
.news-card h4 { font-size: 1rem; margin-bottom: 8px; color: var(--text); line-height: 1.4; }
.news-card p { font-size: 0.85rem; color: var(--text-light); flex: 1; }

/* ---------- Customs Notes Cards ---------- */
.customs-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.customs-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px;
  box-shadow: var(--shadow); transition: var(--transition);
}
.customs-card:hover { box-shadow: var(--shadow-lg); }
.customs-card h3 { font-size: 1.1rem; color: var(--primary); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.customs-card ul { list-style: none; font-size: 0.85rem; line-height: 1.8; }
.customs-card ul li::before { content: "📌 "; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info h3 { font-size: 1.25rem; color: var(--primary); margin-bottom: 16px; }
.contact-info .info-item {
  display: flex; align-items: flex-start; gap: 12px; margin-bottom: 16px;
  font-size: 0.95rem;
}
.contact-info .info-item .icon-round {
  width: 40px; height: 40px; background: #eff6ff; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; flex-shrink: 0;
}
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.contact-form input, .contact-form textarea {
  padding: 14px 16px; border: 2px solid var(--border); border-radius: var(--radius);
  font-size: 0.95rem; font-family: var(--font); background: var(--bg-card);
  transition: var(--transition);
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: none; border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.contact-form textarea { min-height: 140px; resize: vertical; }
.btn {
  display: inline-block; padding: 14px 28px; border-radius: var(--radius);
  font-size: 0.95rem; font-weight: 600; border: none; cursor: pointer;
  font-family: var(--font); transition: var(--transition);
  text-decoration: none; text-align: center;
}
.btn-primary { background: var(--primary-light); color: #fff; }
.btn-primary:hover { background: #1d4ed8; transform: translateY(-1px); box-shadow: var(--shadow-lg); }
.btn-outline { background: transparent; border: 2px solid var(--primary-light); color: var(--primary-light); }
.btn-outline:hover { background: var(--primary-light); color: #fff; }

/* ---------- Footer ---------- */
.footer {
  background: var(--primary-dark); color: var(--text-inverse);
  padding: 40px 24px 24px; text-align: center;
}
.footer-inner { max-width: var(--max-width); margin: 0 auto; }
.footer-links { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; margin-bottom: 20px; }
.footer-links a { color: rgba(255,255,255,0.7); text-decoration: none; font-size: 0.875rem; transition: var(--transition); }
.footer-links a:hover { color: var(--accent-light); }
.footer-text { font-size: 0.8rem; color: rgba(255,255,255,0.5); }

/* ---------- No results / empty ---------- */
.no-results { text-align: center; padding: 40px; color: var(--text-light); font-size: 0.95rem; }

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed; bottom: 24px; right: 24px;
  width: 44px; height: 44px; background: var(--primary-light); color: #fff;
  border: none; border-radius: 50%; font-size: 1.2rem; cursor: pointer;
  box-shadow: var(--shadow-lg); transition: var(--transition);
  display: none; z-index: 999;
  align-items: center; justify-content: center;
}
.back-to-top.show { display: flex; }
.back-to-top:hover { background: #1d4ed8; transform: translateY(-2px); }

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  /* Navigation */
  .nav { height: 56px; }
  :root { --nav-height: 56px; }
  .nav-logo { font-size: 1.05rem; }
  .nav-logo .icon { font-size: 1.2rem; }
  .nav-links { 
    display: none; position: fixed; top: var(--nav-height); left: 0; right: 0; bottom: 0;
    background: rgba(255,255,255,0.98); flex-direction: column; padding: 8px;
    overflow-y: auto; z-index: 999;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
  }
  .nav-links.open { display: flex; }
  .nav-links::before {
    content: '';
    display: block;
    padding-top: 4px;
  }
  .nav-toggle { display: block; }
  .nav-links a { padding: 14px 16px; font-size: 0.95rem; border-radius: 8px; }

  /* Hero */
  .hero { padding: 48px 16px 36px; }
  .hero h1 { font-size: 1.5rem; line-height: 1.3; }
  .hero p { font-size: 0.85rem; line-height: 1.7; }
  .hero-badges { gap: 6px; }
  .hero-badge { padding: 6px 12px; font-size: 0.72rem; }

  /* Sections */
  .section { padding: 32px 12px; }
  .section-title { font-size: 1.25rem; }
  .section-subtitle { font-size: 0.85rem; margin-bottom: 20px; }
  .section-divider { margin-bottom: 20px; }

  /* Grids */
  .contact-grid { grid-template-columns: 1fr; gap: 24px; }
  .cards-grid { grid-template-columns: 1fr; gap: 10px; }
  .news-grid { grid-template-columns: 1fr; gap: 12px; }
  .customs-grid { grid-template-columns: 1fr; gap: 12px; }
  .transport-card .cols { grid-template-columns: 1fr; gap: 8px; }

  /* Search */
  .search-bar { flex-direction: column; gap: 8px; }
  .search-bar input { min-width: auto; width: 100%; font-size: 0.9rem; padding: 10px 14px; }
  .search-bar select { width: 100%; font-size: 0.9rem; padding: 10px 14px; }

  /* Tabs */
  .tabs { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; padding-bottom: 4px; }
  .tabs::-webkit-scrollbar { display: none; }
  .tab { padding: 8px 14px; font-size: 0.8rem; white-space: nowrap; }

  /* Cards */
  .card { padding: 14px; }
  .card h4 { font-size: 0.9rem; }
  .card .address, .card .meta { font-size: 0.78rem; }

  /* Table → card-like on mobile */
  .table-wrap { border: none; box-shadow: none; border-radius: 0; }
  table { font-size: 0.78rem; }
  th { padding: 10px 8px; font-size: 0.75rem; }
  td { padding: 8px; }

  /* Transport */
  .transport-card { padding: 16px; }
  .transport-card h3 { font-size: 1rem; }

  /* Risk */
  .risk-list li { padding: 8px 12px; font-size: 0.82rem; }

  /* News */
  .news-card { padding: 14px; }
  .news-card h4 { font-size: 0.9rem; }
  .news-card p { font-size: 0.8rem; }

  /* Customs */
  .customs-card { padding: 16px; }
  .customs-card h3 { font-size: 1rem; }
  .customs-card ul { font-size: 0.8rem; }

  /* Contact form */
  .contact-form input, .contact-form textarea { padding: 12px 14px; font-size: 0.9rem; }
  .btn { padding: 12px 24px; font-size: 0.9rem; width: 100%; }
  .btn-outline { width: auto; }
  .contact-info .info-item { font-size: 0.85rem; }

  /* Footer */
  .footer { padding: 28px 16px 20px; }
  .footer-links { gap: 12px; }
  .footer-links a { font-size: 0.78rem; padding: 4px 8px; }
  .footer-text { font-size: 0.72rem; }

  /* Back to top + floating contact */
  .back-to-top { bottom: 140px; right: 14px; width: 38px; height: 38px; font-size: 1rem; }
  .floating-contact { bottom: 70px; right: 14px; }

  /* No results */
  .no-results { padding: 28px; font-size: 0.85rem; }

  /* Fix tap targets */
  a, button { min-height: 44px; min-width: 44px; }
  .nav-links a { min-height: auto; }
  .tab { min-height: auto; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.25rem; }
  .hero p { font-size: 0.8rem; }
  .hero { padding: 36px 12px 28px; }
  .hero-badges { gap: 4px; }
  .hero-badge { padding: 5px 10px; font-size: 0.68rem; }
  .nav-logo { font-size: 0.95rem; }
}

/* ===== FLOATING CONTACT ===== */
.floating-contact {
  position: fixed;
  bottom: 80px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.floating-trigger {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #07c160, #06ad56);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(7, 193, 96, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s, box-shadow 0.3s;
  animation: floatPulse 2s infinite;
}

.floating-trigger:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 24px rgba(7, 193, 96, 0.55);
}

.floating-icon {
  font-size: 1.6rem;
  line-height: 1;
}

@keyframes floatPulse {
  0%, 100% { box-shadow: 0 4px 16px rgba(7, 193, 96, 0.4); }
  50% { box-shadow: 0 4px 28px rgba(7, 193, 96, 0.65); }
}

.floating-card {
  display: none;
  width: 260px;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.15);
  overflow: hidden;
  animation: slideUp 0.3s ease;
}

.floating-card.active {
  display: block;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.floating-card-header {
  background: linear-gradient(135deg, #07c160, #06ad56);
  color: #fff;
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 0.95rem;
}

.floating-close {
  background: rgba(255,255,255,0.2);
  border: none;
  color: #fff;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.floating-close:hover {
  background: rgba(255,255,255,0.35);
}

.floating-card-body {
  padding: 20px 16px;
  text-align: center;
}

.floating-qr {
  margin-bottom: 16px;
}

.floating-qr img {
  width: 160px;
  height: 160px;
  border-radius: 8px;
  border: 2px solid #f0f0f0;
  object-fit: contain;
  display: block;
  margin: 0 auto 8px;
}

.floating-qr p {
  font-size: 0.85rem;
  color: #666;
  margin: 0;
}

.floating-email {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 0;
  border-top: 1px solid #f0f0f0;
  font-size: 0.85rem;
  color: #333;
  text-decoration: none;
  transition: color 0.2s;
}

.floating-email:hover {
  color: #07c160;
}

@media (max-width: 480px) {
  .floating-contact {
    bottom: 60px;
    right: 12px;
  }
  .floating-trigger {
    width: 48px;
    height: 48px;
  }
  .floating-icon {
    font-size: 1.3rem;
  }
  .floating-card {
    width: 240px;
  }
}