/* ========================================
   国际货运专线聚合比价平台 - 核心样式表
   荧光黄+深邃紫 OTA聚合平台视觉
   ======================================== */

/* CSS Variables */
:root {
  --primary: #E5FF00;
  --primary-dark: #C8E000;
  --secondary: #4A148C;
  --secondary-light: #6A1B9A;
  --bg-main: #F4F6F9;
  --card-bg: #FFFFFF;
  --text-main: #333333;
  --text-light: #666666;
  --text-muted: #999999;
  --border: #E0E0E0;
  --success: #00C853;
  --warning: #FF6D00;
  --danger: #D50000;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.15);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-main);
  color: var(--text-main);
  background: var(--bg-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--secondary-light);
}

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

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ========================================
   Header & Navigation
   ======================================== */
.site-header {
  background: var(--secondary);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.site-logo span {
  color: #FFFFFF;
  font-weight: 400;
  font-size: 0.85rem;
  margin-left: 8px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav a {
  color: #FFFFFF;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
  background: rgba(229, 255, 0, 0.15);
  color: var(--primary);
}

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

/* ========================================
   Hero Search Section
   ======================================== */
.hero-search {
  background: linear-gradient(135deg, var(--secondary) 0%, #1A0033 100%);
  padding: 80px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero-search::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(229,255,0,0.05) 0%, transparent 50%);
  animation: radarScan 8s linear infinite;
}

@keyframes radarScan {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.hero-title {
  text-align: center;
  color: #FFFFFF;
  font-size: 2.8rem;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.hero-title em {
  color: var(--primary);
  font-style: normal;
}

.hero-subtitle {
  text-align: center;
  color: rgba(255,255,255,0.7);
  font-size: 1.1rem;
  margin-bottom: 40px;
  position: relative;
  z-index: 1;
}

/* Search Panel */
.search-panel {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 900px;
  margin: 0 auto;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 1;
}

.search-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 12px;
}

.search-tab {
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 500;
  font-size: 0.9rem;
  border: none;
  background: transparent;
  color: var(--text-light);
  transition: var(--transition);
}

.search-tab.active {
  background: var(--primary);
  color: var(--secondary);
  font-weight: 600;
}

.search-form {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr auto;
  gap: 16px;
  align-items: end;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group select {
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: var(--font-main);
  transition: var(--transition);
  background: #FAFAFA;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--secondary);
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(74, 20, 140, 0.1);
}

.btn-search {
  padding: 12px 32px;
  background: var(--secondary);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-search:hover {
  background: var(--secondary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ========================================
   Section Styles
   ======================================== */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

.section-title em {
  color: var(--secondary);
  font-style: normal;
}

.section-desc {
  color: var(--text-light);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   Price Cards
   ======================================== */
.price-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.price-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.price-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.price-card .route-badge {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--primary);
  color: var(--secondary);
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 0 var(--radius-md) 0 var(--radius-sm);
}

.price-card .route-info {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.price-card .port {
  font-weight: 600;
  font-size: 1.1rem;
}

.price-card .route-arrow {
  color: var(--secondary);
  font-size: 1.2rem;
}

.price-card .price-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-top: 1px dashed var(--border);
}

.price-card .price-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--secondary);
}

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

.price-card .transit-time {
  font-size: 0.85rem;
  color: var(--text-light);
}

.price-card .btn-book {
  display: block;
  width: 100%;
  padding: 10px;
  margin-top: 16px;
  background: var(--primary);
  color: var(--secondary);
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  text-align: center;
  transition: var(--transition);
}

.price-card .btn-book:hover {
  background: var(--primary-dark);
  transform: scale(1.02);
}

/* ========================================
   Trend Chart Section
   ======================================== */
.trend-chart-wrapper {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.chart-placeholder {
  width: 100%;
  height: 300px;
  background: linear-gradient(180deg, rgba(74,20,140,0.05) 0%, rgba(229,255,0,0.05) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--border);
  position: relative;
  overflow: hidden;
}

.chart-placeholder::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 60%;
  background: linear-gradient(to top, rgba(229,255,0,0.1), transparent);
  clip-path: polygon(0 80%, 10% 60%, 20% 70%, 30% 40%, 40% 50%, 50% 30%, 60% 45%, 70% 20%, 80% 35%, 90% 15%, 100% 25%, 100% 100%, 0 100%);
}

/* ========================================
   Features / Why Us
   ======================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border);
}

.feature-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--text-main);
}

.feature-card p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* ========================================
   Provider / CTA Section
   ======================================== */
.cta-section {
  background: linear-gradient(135deg, var(--secondary) 0%, #1A0033 100%);
  padding: 80px 0;
  text-align: center;
}

.cta-section h2 {
  color: #FFFFFF;
  font-size: 2rem;
  margin-bottom: 16px;
}

.cta-section p {
  color: rgba(255,255,255,0.7);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.btn-cta {
  display: inline-block;
  padding: 14px 40px;
  background: var(--primary);
  color: var(--secondary);
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  transition: var(--transition);
}

.btn-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--secondary);
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
  background: #1A0033;
  color: rgba(255,255,255,0.7);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  color: var(--primary);
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.85rem;
  line-height: 1.8;
}

.footer-links h4 {
  color: #FFFFFF;
  font-size: 0.95rem;
  margin-bottom: 16px;
}

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

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  color: rgba(255,255,255,0.6);
  font-size: 0.85rem;
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

/* ========================================
   Breadcrumb
   ======================================== */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

.breadcrumb a:hover {
  color: var(--secondary);
}

.breadcrumb span {
  margin: 0 8px;
}

/* ========================================
   Page Banner
   ======================================== */
.page-banner {
  background: linear-gradient(135deg, var(--secondary) 0%, #2E0854 100%);
  padding: 60px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('../images/global-routes.webp') center/cover no-repeat;
  opacity: 0.1;
}

.page-banner h1 {
  color: #FFFFFF;
  font-size: 2.2rem;
  position: relative;
  z-index: 1;
  margin-bottom: 8px;
}

.page-banner p {
  color: rgba(255,255,255,0.7);
  position: relative;
  z-index: 1;
}

/* ========================================
   Content Page
   ======================================== */
.page-content {
  padding: 48px 0 80px;
}

.content-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

.content-card h2 {
  font-size: 1.5rem;
  color: var(--text-main);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--primary);
  display: inline-block;
}

.content-card h3 {
  font-size: 1.2rem;
  color: var(--secondary);
  margin: 24px 0 12px;
}

.content-card p {
  margin-bottom: 16px;
  line-height: 1.8;
  color: var(--text-main);
}

.content-card ul, .content-card ol {
  margin: 12px 0 20px 20px;
  line-height: 2;
}

/* Table Styles */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.9rem;
}

.data-table th {
  background: var(--secondary);
  color: #FFFFFF;
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.data-table tr:hover td {
  background: rgba(229, 255, 0, 0.05);
}

.data-table .price-highlight {
  color: var(--secondary);
  font-weight: 700;
}

/* ========================================
   Filter Panel
   ======================================== */
.filter-panel {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.filter-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filter-item label {
  font-size: 0.85rem;
  color: var(--text-light);
  white-space: nowrap;
}

.filter-item select,
.filter-item input {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-family: var(--font-main);
}

/* ========================================
   FAQ Accordion
   ======================================== */
.faq-list {
  margin-top: 24px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  padding: 16px 20px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #FAFAFA;
  transition: var(--transition);
}

.faq-question:hover {
  background: rgba(229, 255, 0, 0.1);
}

.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  padding: 16px 20px;
  max-height: 500px;
}

/* ========================================
   Search Page
   ======================================== */
.search-page-input {
  display: flex;
  gap: 12px;
  max-width: 600px;
  margin: 0 auto 40px;
}

.search-page-input input {
  flex: 1;
  padding: 14px 20px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: var(--font-main);
}

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

.search-page-input button {
  padding: 14px 28px;
  background: var(--secondary);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.search-results {
  max-width: 800px;
  margin: 0 auto;
}

.search-result-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.search-result-item h3 a {
  font-size: 1.1rem;
  color: var(--secondary);
}

.search-result-item p {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-top: 6px;
}

/* ========================================
   404 Page
   ======================================== */
.error-page {
  text-align: center;
  padding: 120px 20px;
}

.error-page h1 {
  font-size: 8rem;
  color: var(--primary);
  text-shadow: 4px 4px 0 var(--secondary);
  line-height: 1;
}

.error-page h2 {
  font-size: 1.5rem;
  margin: 16px 0;
}

.error-page p {
  color: var(--text-light);
  margin-bottom: 32px;
}

/* ========================================
   APP Download Page
   ======================================== */
.app-hero {
  background: linear-gradient(135deg, var(--secondary) 0%, #1A0033 100%);
  padding: 80px 0;
  text-align: center;
}

.app-hero h1 {
  color: #FFFFFF;
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.app-hero p {
  color: rgba(255,255,255,0.7);
  font-size: 1.1rem;
  margin-bottom: 32px;
}

.app-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.app-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: var(--primary);
  color: var(--secondary);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: var(--transition);
}

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

.app-btn.secondary {
  background: rgba(255,255,255,0.1);
  color: #FFFFFF;
  border: 1px solid rgba(255,255,255,0.3);
}

.app-btn.secondary:hover {
  background: rgba(255,255,255,0.2);
  color: #FFFFFF;
}

/* ========================================
   Image Responsive
   ======================================== */
.responsive-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  object-fit: cover;
}

.img-banner {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

.price-flash {
  animation: pulse 2s ease-in-out infinite;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 60px;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--secondary);
    flex-direction: column;
    padding: 20px;
    gap: 8px;
    box-shadow: var(--shadow-lg);
  }
  .main-nav.open {
    display: flex;
  }
  .nav-toggle {
    display: block;
  }
  .hero-title {
    font-size: 1.8rem;
  }
  .hero-search {
    padding: 50px 0 70px;
  }
  .search-form {
    grid-template-columns: 1fr;
  }
  .search-panel {
    padding: 20px;
    margin: 0 16px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .price-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .section {
    padding: 50px 0;
  }
  .section-title {
    font-size: 1.5rem;
  }
  .content-card {
    padding: 24px;
  }
  .page-banner h1 {
    font-size: 1.6rem;
  }
  .filter-panel {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.4rem;
  }
  .search-tabs {
    flex-wrap: wrap;
  }
  .app-buttons {
    flex-direction: column;
    align-items: center;
  }
}