/* ============================================
   江苏赛克商贸有限公司 · 绿色智慧出行官网
   ============================================ */

:root {
  --color-primary: #059669;
  --color-primary-dark: #047857;
  --color-primary-light: #34d399;
  --color-secondary: #0ea5e9;
  --color-secondary-dark: #0284c7;
  --color-energy: #f59e0b;
  --color-deep: #0f172a;
  --color-slate-800: #1e293b;
  --color-slate-700: #334155;
  --color-slate-600: #475569;
  --color-slate-500: #64748b;
  --color-slate-200: #e2e8f0;
  --color-slate-100: #f1f5f9;
  --color-slate-50: #f8fafc;
  --color-white: #ffffff;

  --font-family-base: 'Noto Sans SC', 'Source Han Sans SC', 'Microsoft YaHei', sans-serif;
  --font-family-heading: 'Exo 2', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-family-mono: 'Roboto Mono', 'Menlo', 'Consolas', monospace;

  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 30px;
  --font-size-4xl: 36px;
  --font-size-5xl: 46px;

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 14px;
  --spacing-lg: 20px;
  --spacing-xl: 28px;
  --spacing-2xl: 40px;
  --spacing-3xl: 56px;
  --spacing-4xl: 72px;

  --border-radius-sm: 6px;
  --border-radius-md: 12px;
  --border-radius-lg: 22px;
  --border-radius-full: 999px;

  --shadow-sm: 0 8px 20px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 20px 40px rgba(15, 23, 42, 0.12);
  --shadow-lg: 0 30px 60px rgba(15, 23, 42, 0.18);

  --container-width: 1200px;
  --transition-fast: 160ms ease;
  --transition-base: 260ms ease;
  --transition-slow: 420ms ease;
}

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

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

body {
  font-family: var(--font-family-base);
  color: var(--color-slate-700);
  background: var(--color-slate-50);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--border-radius-md);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  color: var(--color-deep);
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
  color: var(--color-slate-600);
  margin-bottom: var(--spacing-lg);
}

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

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

ul, ol {
  margin: var(--spacing-lg) 0 var(--spacing-lg) 1.2rem;
}

button, .btn {
  border: none;
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-base);
  font-weight: 600;
  padding: var(--spacing-sm) var(--spacing-xl);
  cursor: pointer;
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.btn-primary {
  background: linear-gradient(125deg, var(--color-primary), var(--color-secondary));
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  border: 1px solid rgba(5, 150, 105, 0.5);
  color: var(--color-primary-dark);
  background: transparent;
}

.btn-outline:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: rgba(5, 150, 105, 0.08);
}

.btn-white {
  background: rgba(255, 255, 255, 0.18);
  color: var(--color-white);
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

section {
  padding: var(--spacing-4xl) 0;
}

.bg-light {
  background: var(--color-slate-50);
}

.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.text-center { text-align: center; }
.text-right { text-align: right; }

.section-heading {
  margin-bottom: var(--spacing-2xl);
}

.section-heading span {
  display: inline-flex;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: var(--font-size-sm);
  color: var(--color-secondary);
  margin-bottom: var(--spacing-sm);
}

.section-heading h2 {
  margin-bottom: var(--spacing-sm);
}

.section-heading p {
  max-width: 720px;
}

.grid {
  display: grid;
  gap: var(--spacing-xl);
}

.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.split-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--spacing-2xl);
  align-items: center;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-xl);
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  background: rgba(14, 165, 233, 0.12);
  color: var(--color-secondary-dark);
  font-weight: 600;
}

.card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.card img {
  margin-bottom: var(--spacing-lg);
  border-radius: var(--border-radius-md);
}

.hero {
  position: relative;
  background: url('../images/urban_banner_30.png') center/cover no-repeat;
  color: var(--color-white);
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, rgba(5, 150, 105, 0.92), rgba(14, 165, 233, 0.85));
}

.hero .container {
  position: relative;
  z-index: 2;
  color: var(--color-white);
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--spacing-2xl);
  align-items: center;
}

.hero h1,
.hero p {
  color: var(--color-white);
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.hero-meta div {
  backdrop-filter: blur(6px);
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
}

.hero-meta strong {
  display: block;
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-xs);
}

.quick-entry {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.quick-entry .card {
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-xl);
  padding-left: var(--spacing-lg);
}

.navbar-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  font-weight: 700;
  color: var(--color-primary);
  font-size: var(--font-size-xl);
  line-height: 1.2;
}

.navbar-brand-name {
  font-size: var(--font-size-xl);
}

.navbar-brand-tagline {
  font-size: var(--font-size-sm);
  color: var(--color-slate-500);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.navbar-menu {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.navbar-link {
  color: var(--color-slate-700);
  font-weight: 500;
  padding: var(--spacing-sm) 0;
  position: relative;
}

.navbar-link::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(120deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0.4);
  opacity: 0;
  transition: var(--transition-base);
}

.navbar-link:hover::after,
.navbar-link.active::after {
  transform: scaleX(1);
  opacity: 1;
}

.navbar-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--color-slate-700);
}

.navbar-item {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  min-width: 220px;
  background: var(--color-white);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-md) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition-base);
  list-style: none;
}

.navbar-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-xl);
  color: var(--color-slate-700);
  font-size: var(--font-size-sm);
}

.dropdown-link:hover {
  background: var(--color-slate-100);
  color: var(--color-primary-dark);
}

main {
  margin-top: 86px;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--spacing-xl);
}

.metric-card {
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(14, 165, 233, 0.15);
  background: var(--color-white);
}

.metric-value {
  font-size: 44px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.metric-label {
  color: var(--color-slate-500);
}

.series-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.series-card img {
  width: 100%;
  max-height: 240px;
  object-fit: contain;
  background: linear-gradient(160deg, rgba(5, 150, 105, 0.08), rgba(14, 165, 233, 0.08));
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-md);
}

.series-card .card-body {
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.series-card h3 {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.series-highlights {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.series-highlights li {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.series-highlights li::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-energy);
}

.product-carousel {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(260px, 1fr);
  gap: var(--spacing-lg);
  overflow-x: auto;
  padding-bottom: var(--spacing-md);
}

.product-card {
  background: var(--color-white);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
}

.product-meta {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
  color: var(--color-slate-500);
  font-size: var(--font-size-sm);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  border: 1px solid rgba(5, 150, 105, 0.15);
  padding: var(--spacing-xl);
}

.scenario-slider {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(280px, 1fr);
  gap: var(--spacing-xl);
  overflow-x: auto;
  padding-bottom: var(--spacing-md);
}

.scenario-card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  border: 1px solid rgba(14, 165, 233, 0.15);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

.comparison-table th,
.comparison-table td {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-slate-100);
  text-align: center;
}

.comparison-table th {
  background: rgba(5, 150, 105, 0.08);
  font-weight: 600;
}

.map-card {
  background: var(--color-deep);
  color: var(--color-white);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-xl);
}

.testimonial-card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(5, 150, 105, 0.1);
  padding: var(--spacing-xl);
}

.testimonial-meta {
  margin-top: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cta-banner {
  background: linear-gradient(120deg, var(--color-secondary), var(--color-primary));
  color: var(--color-white);
  padding: var(--spacing-3xl);
  border-radius: var(--border-radius-lg);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--spacing-2xl);
  align-items: center;
}

.page-hero {
  background: linear-gradient(135deg, rgba(5, 150, 105, 0.08), rgba(14, 165, 233, 0.08));
  padding: var(--spacing-3xl) 0;
}

.breadcrumbs {
  display: inline-flex;
  gap: var(--spacing-sm);
  color: var(--color-slate-500);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-lg);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-xl);
}

.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 16px;
  width: 2px;
  background: linear-gradient(var(--color-secondary), var(--color-primary));
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-xl);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 3px solid var(--color-primary);
  background: var(--color-white);
}

.data-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-xl);
}

.data-cell {
  background: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(15, 23, 42, 0.08);
}

.data-cell strong {
  font-size: 36px;
  color: var(--color-primary);
}

.tab-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.tab-group a {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-full);
  background: var(--color-white);
  border: 1px solid transparent;
  font-weight: 500;
}

.tab-group a.active {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  background: rgba(14, 165, 233, 0.12);
}

.table-layout {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

.table-layout th,
.table-layout td {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-slate-100);
  text-align: left;
}

.table-layout th {
  background: rgba(5, 150, 105, 0.08);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--spacing-xl);
}

.process-step {
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(5, 150, 105, 0.1);
}

.icon-list {
  list-style: none;
  display: grid;
  gap: var(--spacing-sm);
}

.icon-list li {
  display: flex;
  gap: var(--spacing-sm);
  align-items: flex-start;
}

.icon-list span {
  color: var(--color-primary);
  font-weight: 700;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--spacing-lg);
}

input, select, textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid rgba(15, 23, 42, 0.15);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-base);
  font-family: inherit;
  transition: border var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.2);
}

textarea {
  min-height: 140px;
  resize: vertical;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-xl);
}

.news-card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.news-card-content {
  padding: var(--spacing-xl);
}

.news-meta {
  font-size: var(--font-size-sm);
  color: var(--color-slate-500);
  margin-bottom: var(--spacing-sm);
}

.article-content {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-sm);
}

.article-content h3 {
  margin-top: var(--spacing-2xl);
}

.dealer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-xl);
}

.dealer-card {
  border: 1px solid rgba(5, 150, 105, 0.12);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  background: var(--color-white);
}

.dealer-card strong {
  display: block;
  margin-bottom: var(--spacing-xs);
}

.contact-card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  border: 1px solid rgba(14, 165, 233, 0.12);
}

.footer {
  background: var(--color-deep);
  color: rgba(255, 255, 255, 0.75);
  padding: var(--spacing-4xl) 0 var(--spacing-2xl);
}

.footer-columns {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
}

.footer h4 {
  color: var(--color-white);
  margin-bottom: var(--spacing-lg);
}

.footer a {
  color: rgba(255, 255, 255, 0.75);
  display: block;
  margin-bottom: var(--spacing-sm);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.animate {
  opacity: 0;
  transform: translateY(24px);
  transition: all var(--transition-slow);
}

.animate-in {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1180px) {
  .navbar .container {
    padding: var(--spacing-md) var(--spacing-lg);
  }
}

@media (max-width: 992px) {
  .grid-4,
  .feature-grid,
  .metrics-grid,
  .hero-meta,
  .news-grid,
  .testimonial-grid,
  .dealer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-grid,
  .cta-banner,
  .quick-entry,
  .page-hero .info-grid,
  .process-steps,
  .data-board,
  .form-grid,
  .split-panel,
  .footer-columns {
    grid-template-columns: 1fr;
  }

  .navbar-toggle {
    display: block;
  }

  .navbar-menu {
    position: absolute;
    top: 100%;
    right: var(--spacing-xl);
    background: var(--color-white);
    flex-direction: column;
    width: 280px;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    transform: translateY(-20px);
    opacity: 0;
    visibility: hidden;
  }

  .navbar-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .dropdown-menu {
    position: relative;
    top: 0;
    left: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
  }
}

@media (max-width: 768px) {
  h1 { font-size: 34px; }
  h2 { font-size: 28px; }
  h3 { font-size: 24px; }

  .grid-3,
  .metrics-grid,
  .feature-grid,
  .news-grid,
  .testimonial-grid,
  .dealer-grid,
  .info-grid {
    grid-template-columns: 1fr;
  }

  section {
    padding: var(--spacing-3xl) 0;
  }

  .hero-grid {
    grid-template-columns: 1fr;
  }

  .quick-entry {
    grid-template-columns: 1fr;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }
}