/* ============================================
   常诚车业江苏有限公司官网 - 新一代极速未来视觉系统
   设计语言：暗黑霓虹 + 赛车速度感
   ============================================ */

:root {
  --color-primary: #e53935;          /* 赛道红 */
  --color-secondary: #00ff88;        /* 霓虹绿 */
  --color-dark: #05060c;
  --color-dark-alt: #0f1627;
  --color-panel: rgba(9, 15, 29, 0.9);
  --color-panel-alt: rgba(18, 23, 40, 0.85);
  --color-text: #e6f1ff;
  --color-muted: rgba(230, 241, 255, 0.75);
  --color-border: rgba(255, 255, 255, 0.08);
  --color-glow: rgba(229, 57, 53, 0.35);
  --color-glow-alt: rgba(0, 255, 136, 0.35);

  --font-heading: 'Rajdhani', 'Microsoft YaHei', 'DIN Alternate', sans-serif;
  --font-body: 'Inter', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --font-tech: 'Orbitron', 'Rajdhani', 'Microsoft YaHei', sans-serif;

  --spacing-2xs: 4px;
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 20px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 72px;
  --spacing-3xl: 112px;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;
  --radius-full: 999px;

  --shadow-soft: 0 15px 45px rgba(0, 0, 0, 0.35);
  --shadow-strong: 0 25px 70px rgba(0, 0, 0, 0.55);

  --blur-strong: blur(18px);
  --gradient-track: linear-gradient(135deg, rgba(229, 57, 53, 0.8), rgba(15, 52, 96, 0.65));
  --gradient-panel: linear-gradient(145deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0));
  --gradient-secondary: linear-gradient(135deg, #00ff88, #00b3b3);

  --transition-fast: 150ms ease;
  --transition-base: 320ms ease;
  --transition-slow: 600ms ease;

  --max-width: 1280px;
}

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: radial-gradient(circle at 20% 20%, rgba(229, 57, 53, 0.08), transparent 45%),
              radial-gradient(circle at 80% 0%, rgba(0, 255, 136, 0.08), transparent 40%),
              #03040a;
  line-height: 1.75;
  min-height: 100vh;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

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

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

a:hover {
  color: #7effc7;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-muted);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #ffffff;
}

h1 { font-size: clamp(2.8rem, 4vw, 4.2rem); }
h2 { font-size: clamp(2rem, 3vw, 3.2rem); }
h3 { font-size: clamp(1.6rem, 2vw, 2.4rem); }
h4 { font-size: clamp(1.2rem, 1.4vw, 1.5rem); }

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

.section {
  padding: var(--spacing-2xl) 0;
  position: relative;
}

.section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 70%);
  pointer-events: none;
}

.section-dark {
  background: rgba(3, 4, 10, 0.85);
}

.section-contrast {
  background: radial-gradient(circle at 10% 20%, rgba(0, 255, 136, 0.08), transparent 50%),
              rgba(5, 6, 12, 0.95);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-title p {
  max-width: 680px;
  margin: var(--spacing-md) auto 0 auto;
}

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

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.card {
  background: var(--color-panel);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-panel);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover::after {
  opacity: 1;
}

.card h3, .card h4 {
  margin-bottom: var(--spacing-sm);
}

.card p:last-child {
  margin-bottom: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  background: rgba(229, 57, 53, 0.2);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
}

.badge.green {
  background: rgba(0, 255, 136, 0.2);
  color: var(--color-secondary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient-track);
  color: #fff;
  box-shadow: 0 10px 30px rgba(229, 57, 53, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
}

.btn-ghost:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.btn-outline {
  border: 1px solid rgba(0, 255, 136, 0.5);
  color: var(--color-secondary);
  background: transparent;
}

.btn-outline:hover {
  background: rgba(0, 255, 136, 0.08);
}

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: #05060c;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(229, 57, 53, 0.45), transparent 45%),
              radial-gradient(circle at 70% 30%, rgba(0, 255, 136, 0.35), transparent 40%);
  opacity: 0.6;
}

.hero-grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  align-items: center;
  gap: var(--spacing-2xl);
  position: relative;
  z-index: 2;
}

.hero-content h1 {
  margin-bottom: var(--spacing-md);
}

.hero-content p {
  max-width: 520px;
  font-size: 1.1rem;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
}

.hero-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  min-height: 380px;
  box-shadow: var(--shadow-strong);
}

.hero-motion-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.9;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.2);
}

.hero-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-lg);
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.85));
}

.speed-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.speed-line {
  position: absolute;
  width: 2px;
  height: 120px;
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.8));
  opacity: 0.3;
  animation: speedFall 4s linear infinite;
}

@keyframes speedFall {
  0% { transform: translateY(-100%); opacity: 0; }
  10% { opacity: 0.6; }
  100% { transform: translateY(200%); opacity: 0; }
}

.data-panel {
  background: var(--color-panel);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-lg);
}

.metric {
  position: relative;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.metric strong {
  font-size: 2rem;
  display: block;
}

.metric span {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.metric::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(130deg, rgba(229, 57, 53, 0.25), rgba(0, 255, 136, 0.25));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.metric:hover::after {
  opacity: 1;
}

.gauge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.gauge {
  position: relative;
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(5, 6, 12, 0.85);
  overflow: hidden;
}

.gauge::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top, rgba(0, 255, 136, 0.15), transparent 60%);
}

.gauge svg {
  width: 170px;
  height: 170px;
  display: block;
  margin: 0 auto var(--spacing-md) auto;
}

.gauge-value {
  font-size: 2.4rem;
  color: var(--color-secondary);
  text-align: center;
  font-family: var(--font-tech);
}

.gauge-label {
  text-align: center;
  letter-spacing: 0.3em;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.product-rotator {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  align-items: center;
}

.rotator-display {
  position: relative;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  background: radial-gradient(circle at 30% 30%, rgba(229, 57, 53, 0.45), transparent 65%),
              rgba(6, 8, 18, 0.95);
  box-shadow: var(--shadow-strong);
}

.rotator-display img {
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
  transform: perspective(900px) rotateY(var(--rotateY, 0deg));
  transition: transform var(--transition-slow);
}

.rotator-controls {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.rotator-controls input[type="range"] {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  outline: none;
}

.rotator-controls input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  background: var(--color-secondary);
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(0, 255, 136, 0.8);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-lg);
}

.tech-card {
  padding: var(--spacing-lg);
  background: rgba(8, 12, 24, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  position: relative;
}

.tech-card h4 {
  margin-bottom: var(--spacing-sm);
}

.timeline {
  position: relative;
  padding-left: var(--spacing-xl);
  border-left: 2px solid rgba(255, 255, 255, 0.15);
  margin-top: var(--spacing-xl);
}

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

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(var(--spacing-xl) * -1);
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 20px rgba(229, 57, 53, 0.8);
}

.stats-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.stat-pill {
  flex: 1;
  min-width: 180px;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.2);
  text-align: center;
  font-family: var(--font-tech);
}

.highlight-panel {
  margin-top: var(--spacing-xl);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, rgba(229, 57, 53, 0.2), rgba(0, 0, 0, 0.6));
}

.dealer-map {
  position: relative;
  border-radius: var(--radius-lg);
  background: rgba(8, 12, 24, 0.92);
  padding: var(--spacing-lg);
  overflow: hidden;
}

.dealer-map img {
  opacity: 0.85;
  border-radius: var(--radius-md);
}

.table {
  width: 100%;
  border-collapse: collapse;
  border-spacing: 0;
  font-size: 0.95rem;
}

.table thead {
  background: rgba(255, 255, 255, 0.08);
}

.table th,
.table td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.table tbody tr:hover {
  background: rgba(255, 255, 255, 0.04);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.news-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
  background: rgba(7, 10, 18, 0.95);
  display: flex;
  flex-direction: column;
  min-height: 360px;
}

.news-card img {
  height: 220px;
  object-fit: cover;
}

.news-card-content {
  padding: var(--spacing-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-card-content h3 {
  margin-bottom: var(--spacing-sm);
}

.news-card-content .more {
  margin-top: auto;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.85rem;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-lg);
}

.case-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.case-card img {
  height: 240px;
  object-fit: cover;
  filter: saturate(1.15);
}

.case-card .case-info {
  padding: var(--spacing-lg);
  background: rgba(0, 0, 0, 0.65);
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-md);
}

.partner-card {
  padding: var(--spacing-md);
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
}

.partner-card span {
  font-family: var(--font-heading);
  letter-spacing: 0.1em;
}

.career-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.career-card {
  padding: var(--spacing-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  background: rgba(8, 12, 24, 0.92);
}

.form-card {
  background: rgba(10, 15, 25, 0.95);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
}

input, textarea, select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 1rem;
}

textarea {
  min-height: 150px;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 2px rgba(0, 255, 136, 0.3);
}

.list-check {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-sm);
}

.list-check li {
  position: relative;
  padding-left: 28px;
  color: var(--color-muted);
}

.list-check li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 4px;
  background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%2300ff88"><path d="M20.285 6.709l-11.1 11.086-5.47-5.47 1.414-1.415 4.056 4.056 9.686-9.672z"/></svg>') no-repeat center/contain;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-lg);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

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

.page-hero {
  position: relative;
  padding: var(--spacing-3xl) 0 var(--spacing-2xl);
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(229, 57, 53, 0.25), transparent 55%),
              radial-gradient(circle at 80% 0%, rgba(0, 255, 136, 0.2), transparent 50%);
  opacity: 0.7;
}

.page-hero .container {
  position: relative;
  z-index: 2;
}

.page-hero h1 {
  margin-bottom: var(--spacing-sm);
}

.page-hero p {
  max-width: 720px;
}

.tagline {
  font-family: var(--font-tech);
  letter-spacing: 0.35em;
  font-size: 0.85rem;
  color: var(--color-secondary);
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
}

.split-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
}

.media-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.media-card img {
  height: 100%;
  object-fit: cover;
}

.tablet-panel {
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.quote {
  font-style: italic;
  font-size: 1.1rem;
  color: #fff;
  border-left: 3px solid var(--color-primary);
  padding-left: var(--spacing-md);
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.download-card {
  padding: var(--spacing-lg);
  flex-grow: 1;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.download-card .actions {
  margin-top: auto;
}

.alert {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(229, 57, 53, 0.1);
}

blockquote {
  border-left: 3px solid var(--color-secondary);
  padding-left: var(--spacing-md);
  color: #fff;
}

@media (max-width: 1024px) {
  .hero {
    min-height: auto;
    padding-top: var(--spacing-3xl);
  }

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

  .hero-media {
    order: -1;
    min-height: 320px;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .breadcrumb {
    flex-wrap: wrap;
  }
}