/* 西部数据 - 极简工业风 样式表 (style.css) */

:root {
  --bg-primary: #0b0c0e;
  --bg-surface: #121418;
  --bg-card: #171920;
  --bg-card-hover: #1e212b;
  --border-color: #272a36;
  --border-highlight: #3c4255;
  
  --text-main: #f0f3f8;
  --text-muted: #949eb0;
  --text-dim: #5c6578;
  
  --accent-amber: #ff6600;
  --accent-cyan: #00e5ff;
  --accent-green: #10b981;
  
  --font-brand: system-ui, -apple-system, "SF Pro Rounded", "PingFang SC", "Microsoft YaHei", "Arial Rounded MT Bold", sans-serif;
  --font-mono: "Fira Code", "Cascadia Code", "Roboto Mono", Consolas, monospace;
  
  --container-max: 1200px;
  --header-height: 72px;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-brand);
  -webkit-font-smoothing: antialiased;
}

body {
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(0, 229, 255, 0.04) 0%, transparent 60%),
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 100% 100%, 40px 40px, 40px 40px;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* Accessibility Focus */
:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
}

/* Industrial Badge Tag */
.tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background-color: rgba(255, 102, 0, 0.1);
  color: var(--accent-amber);
  border: 1px solid rgba(255, 102, 0, 0.3);
  border-radius: 2px;
}

.tag-badge::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--accent-amber);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-amber);
}

.tag-badge.cyan {
  background-color: rgba(0, 229, 255, 0.08);
  color: var(--accent-cyan);
  border-color: rgba(0, 229, 255, 0.3);
}
.tag-badge.cyan::before {
  background-color: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 90px 0;
  position: relative;
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  margin-bottom: 54px;
  text-align: center;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-top: 12px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 12px auto 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 4px;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #ff6600 0%, #e65c00 100%);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(255, 102, 0, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #ff751a 0%, #ff6600 100%);
  box-shadow: 0 6px 26px rgba(255, 102, 0, 0.5);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border-color: var(--border-highlight);
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

/* Header Navbar */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(11, 12, 14, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  display: flex;
  align-items: center;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.03em;
}

.logo-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--accent-amber), var(--accent-cyan));
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #000;
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 1.1rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-main);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px;
  border-radius: 4px;
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 90px;
  min-height: 85vh;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 16px 0;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--accent-amber) 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px dashed var(--border-color);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-cyan);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Industrial Spec Graphic Frame */
.hero-visual {
  position: relative;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.visual-header {
  background-color: var(--bg-surface);
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.visual-dots {
  display: flex;
  gap: 6px;
}

.visual-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #272a36;
}

.visual-dot.red { background-color: #ef4444; }
.visual-dot.yellow { background-color: #f59e0b; }
.visual-dot.green { background-color: #10b981; }

.visual-content {
  padding: 16px;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 32px 24px;
  border-radius: 6px;
  transition: all var(--transition-normal);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.feature-card:hover {
  border-color: var(--accent-amber);
  transform: translateY(-4px);
  background-color: var(--bg-card-hover);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background-color: rgba(255, 102, 0, 0.08);
  border: 1px solid rgba(255, 102, 0, 0.2);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-amber);
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.feature-spec {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
}

/* Streaming & AI Section */
.streaming-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.service-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 24px 20px;
  text-align: center;
  transition: border-color var(--transition-fast);
}

.service-card:hover {
  border-color: var(--accent-cyan);
}

.service-card-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.service-name {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.service-note {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card.popular {
  border-color: var(--accent-amber);
  background-color: #1a1c25;
  box-shadow: 0 0 30px rgba(255, 102, 0, 0.15);
}

.popular-badge {
  position: absolute;
  top: -14px;
  right: 24px;
  background-color: var(--accent-amber);
  color: #000;
  font-weight: 800;
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-title {
  font-size: 1.35rem;
  font-weight: 800;
}

.pricing-price {
  margin: 20px 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-currency {
  font-size: 1.2rem;
  color: var(--accent-amber);
  font-weight: 700;
}

.price-amount {
  font-size: 2.8rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: var(--text-main);
}

.price-period {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.pricing-features {
  list-style: none;
  margin: 24px 0 32px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.pricing-features li::before {
  content: "✓";
  color: var(--accent-cyan);
  font-weight: bold;
}

/* FAQ Accordion */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 700;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.faq-question:hover {
  color: var(--accent-amber);
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform var(--transition-fast);
  color: var(--accent-cyan);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 0 24px 20px 24px;
  border-top: 1px solid var(--border-color);
}

/* Article Grid & Article Layout */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.article-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
}

.article-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
}

.article-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  margin-bottom: 8px;
}

.article-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
}

.article-summary {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.6;
}

.article-read-more {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-amber);
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-read-more:hover {
  text-decoration: underline;
}

/* Page Article Detail Layout */
.article-detail-container {
  max-width: 840px;
  margin: 120px auto 80px;
  padding: 0 24px;
}

.article-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.article-meta-info {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 16px;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #d1d7e0;
}

.article-body h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 40px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 28px 0 12px 0;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin: 0 0 24px 24px;
  color: var(--text-muted);
}

.article-body li {
  margin-bottom: 8px;
}

.article-callout {
  background-color: rgba(255, 102, 0, 0.06);
  border-left: 4px solid var(--accent-amber);
  padding: 20px;
  border-radius: 0 6px 6px 0;
  margin: 28px 0;
}

.article-callout p {
  margin-bottom: 0;
}

/* Footer Section */
.site-footer {
  background-color: #08090b;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 40px 0;
  margin-top: auto;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
}

.footer-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

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

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Floating Right Side Arrows Navigation */
.side-arrow-nav {
  position: fixed;
  right: 24px;
  bottom: 90px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 90;
  background-color: rgba(18, 20, 24, 0.9);
  border: 1px solid var(--border-color);
  padding: 8px;
  border-radius: 24px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
}

.side-arrow-btn {
  width: 40px;
  height: 40px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.side-arrow-btn:hover:not(:disabled) {
  background-color: var(--accent-amber);
  color: #000;
  border-color: var(--accent-amber);
}

.side-arrow-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.side-nav-indicator {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  text-align: center;
  padding: 2px 0;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-cta-group {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .features-grid, .pricing-grid, .articles-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .streaming-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
  }
  
  .nav-menu.open {
    display: flex;
  }
  
  .mobile-nav-toggle {
    display: block;
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .features-grid, .pricing-grid, .articles-grid, .streaming-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    flex-direction: column;
    gap: 12px;
  }
  
  .side-arrow-nav {
    right: 12px;
    bottom: 24px;
    scale: 0.9;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, ::before, ::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}