/* ============================
   全球海外仓综合服务平台 - 主样式表
   工业黄+深空灰物流仓储视觉风格
   ============================ */

:root {
  --primary: #FFC107;
  --secondary: #1A1A1A;
  --bg: #F8F9FA;
  --card: #FFFFFF;
  --accent: #0056B3;
  --text: #333333;
  --text-light: #666666;
  --border: #E0E0E0;
  --radius: 4px;
  --radius-lg: 8px;
  --shadow: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 24px rgba(0,0,0,0.12);
  --transition: all 0.3s ease;
  --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  --max-width: 1200px;
}

/* Reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background-color: var(--bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--secondary);
}

h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 2rem; margin-bottom: 0.8rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.6rem; }
h4 { font-size: 1.25rem; margin-bottom: 0.5rem; }

p { margin-bottom: 1rem; }

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header / Navigation */
.site-header {
  background: var(--secondary);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 1px;
}

.site-logo span {
  color: #FFFFFF;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 0.5rem;
}

.nav-menu a {
  color: #FFFFFF;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  background: var(--primary);
  color: var(--secondary);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: #FFFFFF;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,26,0.85) 0%, rgba(26,26,26,0.6) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  padding: 3rem 0;
}

.hero h1 {
  color: #FFFFFF;
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero h1 .highlight {
  color: var(--primary);
}

.hero p {
  color: rgba(255,255,255,0.9);
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

/* Tracking Box */
.tracking-box {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,193,7,0.3);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  max-width: 500px;
}

.tracking-box h3 {
  color: var(--primary);
  font-size: 1rem;
  margin-bottom: 0.8rem;
}

.tracking-input-group {
  display: flex;
  gap: 0.5rem;
}

.tracking-input-group input {
  flex: 1;
  padding: 0.8rem 1rem;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.1);
  color: #FFFFFF;
  font-size: 0.95rem;
}

.tracking-input-group input::placeholder {
  color: rgba(255,255,255,0.5);
}

.tracking-input-group button {
  padding: 0.8rem 1.5rem;
  background: var(--primary);
  color: var(--secondary);
  border: none;
  border-radius: var(--radius);
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.tracking-input-group button:hover {
  background: #FFD54F;
  transform: translateY(-1px);
}

/* Section Styles */
.section {
  padding: 4rem 0;
}

.section-dark {
  background: var(--secondary);
  color: #FFFFFF;
}

.section-dark h2,
.section-dark h3 {
  color: #FFFFFF;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--primary);
}

.section-header p {
  color: var(--text-light);
  margin-top: 1rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-body {
  padding: 1.5rem;
}

.card-body h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.card-body p {
  color: var(--text-light);
  font-size: 0.9rem;
}

.card-link {
  display: inline-block;
  margin-top: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
}

.card-link::after {
  content: ' →';
}

/* Stats Bar */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  padding: 2rem 0;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-top: 0.3rem;
}

/* Map Section */
.map-section {
  position: relative;
  background: var(--secondary);
  padding: 4rem 0;
}

.world-map-container {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.map-node {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
  cursor: pointer;
}

.map-node::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  opacity: 0.5;
  animation: pulse-ring 2s infinite;
}

.map-tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--card);
  color: var(--text);
  padding: 0.8rem 1rem;
  border-radius: var(--radius);
  font-size: 0.8rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.map-node:hover .map-tooltip {
  opacity: 1;
  bottom: calc(100% + 8px);
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

@keyframes pulse-ring {
  0% { transform: scale(1); opacity: 0.5; }
  100% { transform: scale(2); opacity: 0; }
}

/* Calculator */
.calculator-section {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.calc-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text);
}

.form-group input,
.form-group select {
  padding: 0.7rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255,193,7,0.2);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

.btn-primary {
  background: var(--primary);
  color: var(--secondary);
}

.btn-primary:hover {
  background: #FFD54F;
  transform: translateY(-2px);
  color: var(--secondary);
}

.btn-accent {
  background: var(--accent);
  color: #FFFFFF;
}

.btn-accent:hover {
  background: #003d80;
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: var(--secondary);
}

/* Brand Wall */
.brand-wall {
  overflow: hidden;
  padding: 2rem 0;
  position: relative;
}

.brand-track {
  display: flex;
  gap: 3rem;
  animation: scroll-brands 30s linear infinite;
}

.brand-item {
  flex-shrink: 0;
  padding: 1rem 2rem;
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font-weight: 700;
  color: var(--text-light);
  white-space: nowrap;
}

@keyframes scroll-brands {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* News Section */
.news-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.news-item {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
  transition: var(--transition);
}

.news-item:hover {
  transform: translateX(4px);
}

.news-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-light);
}

.news-title {
  font-size: 1.1rem;
  margin: 0.5rem 0;
}

/* Footer */
.site-footer {
  background: var(--secondary);
  color: rgba(255,255,255,0.8);
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-col h4 {
  color: var(--primary);
  margin-bottom: 1rem;
  font-size: 1rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.5rem;
}

.footer-col ul a {
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
}

.footer-col ul a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}

/* Breadcrumb */
.breadcrumb {
  padding: 1rem 0;
  font-size: 0.85rem;
}

.breadcrumb a {
  color: var(--text-light);
}

.breadcrumb span {
  color: var(--text-light);
  margin: 0 0.5rem;
}

.breadcrumb .current {
  color: var(--primary);
  font-weight: 600;
}

/* Page Header */
.page-header {
  background: var(--secondary);
  padding: 3rem 0;
  margin-bottom: 2rem;
}

.page-header h1 {
  color: #FFFFFF;
  font-size: 2.2rem;
}

.page-header p {
  color: rgba(255,255,255,0.8);
  max-width: 600px;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--card);
  border-radius: var(--radius-lg);
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-question {
  padding: 1.2rem 1.5rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.faq-question:hover {
  background: rgba(255,193,7,0.05);
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--primary);
  transition: var(--transition);
}

.faq-item.active .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 1.5rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  padding: 0 1.5rem 1.5rem;
  max-height: 500px;
}

/* Table */
.pricing-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.pricing-table th {
  background: var(--secondary);
  color: #FFFFFF;
  padding: 1rem;
  text-align: left;
  font-size: 0.9rem;
}

.pricing-table td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.pricing-table tr:hover td {
  background: rgba(255,193,7,0.05);
}

.pricing-table .price {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent);
}

/* Timeline */
.timeline {
  position: relative;
  padding: 2rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--primary);
}

.timeline-item {
  position: relative;
  padding-left: 60px;
  margin-bottom: 2rem;
}

.timeline-dot {
  position: absolute;
  left: 12px;
  top: 4px;
  width: 20px;
  height: 20px;
  background: var(--primary);
  border-radius: 50%;
  border: 3px solid var(--card);
  box-shadow: var(--shadow);
}

.timeline-content {
  background: var(--card);
  padding: 1.2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--primary);
  font-weight: 700;
}

/* Search */
.search-container {
  max-width: 600px;
  margin: 2rem auto;
}

.search-input-group {
  display: flex;
  gap: 0.5rem;
}

.search-input-group input {
  flex: 1;
  padding: 1rem 1.5rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  transition: var(--transition);
}

.search-input-group input:focus {
  border-color: var(--primary);
  outline: none;
}

.search-results {
  margin-top: 2rem;
}

.search-result-item {
  padding: 1.5rem;
  background: var(--card);
  border-radius: var(--radius-lg);
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.search-result-item h3 a {
  color: var(--accent);
}

.search-result-item p {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* 404 Page */
.error-page {
  text-align: center;
  padding: 6rem 2rem;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 8rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
}

/* Responsive */
@media (max-width: 768px) {
  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.5rem; }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--secondary);
    flex-direction: column;
    padding: 1rem;
    border-top: 1px solid rgba(255,255,255,0.1);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .hero {
    min-height: 450px;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-table {
    display: block;
    overflow-x: auto;
  }
  
  .calc-form {
    grid-template-columns: 1fr;
  }
  
  .tracking-input-group {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }
  
  .hero h1 {
    font-size: 1.6rem;
  }
  
  .stats-bar {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .stat-number {
    font-size: 2rem;
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 2rem; }
.py-2 { padding-top: 1rem; padding-bottom: 1rem; }
.hidden { display: none; }