/* ============================================
   武汉亿聚信息技术有限公司 - 官网设计系统
   Design System: Yejuu Tech Corporate
   Style: Minimal / Professional / Enterprise
   ============================================ */

/* --- Design Tokens --- */
:root {
  /* Brand */
  --brand-red: #E53935;
  --brand-red-dark: #C62828;
  --brand-red-bg: rgba(229, 57, 53, 0.06);
  --brand-red-border: rgba(229, 57, 53, 0.15);

  /* Functional Blue (buttons, links only) */
  --blue: #2563EB;
  --blue-dark: #1D4ED8;
  --blue-bg: #EFF6FF;

  /* Neutrals */
  --white: #FFFFFF;
  --bg: #FFFFFF;
  --bg-alt: #F9FAFB;
  --bg-dark: #0F172A;
  --bg-dark-surface: #1E293B;
  --border: #E5E7EB;
  --border-light: #F3F4F6;
  --text-1: #111827;
  --text-2: #374151;
  --text-3: #6B7280;
  --text-4: #9CA3AF;
  --divider: #E5E7EB;

  /* Typography */
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing */
  --s1: 0.25rem;
  --s2: 0.5rem;
  --s3: 0.75rem;
  --s4: 1rem;
  --s5: 1.5rem;
  --s6: 2rem;
  --s8: 3rem;
  --s10: 4rem;
  --s12: 5rem;
  --s16: 6rem;
  --s20: 8rem;

  /* Layout */
  --max-w: 1200px;
  --header-h: 68px;

  /* Radius — professional, not toy-like */
  --r-sm: 4px;
  --r-md: 6px;
  --r-lg: 8px;
  --r-xl: 12px;
  --r-full: 9999px;

  /* Shadows — minimal */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.08);

  /* Transition */
  --ease: 200ms ease;

  /* --- Compatibility Aliases (used in subpage inline styles) --- */
  --primary: #2563EB;
  --primary-darker: #1D4ED8;
  --primary-50: #EFF6FF;
  --primary-light: #EFF6FF;
  --accent: #0891B2;
  --accent-light: rgba(8,145,178,0.08);
  --green: #059669;
  --green-light: rgba(5,150,105,0.08);
  --orange: #EA580C;
  --orange-light: rgba(234,88,12,0.08);
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;
  --dark-bg: #0F172A;
  --dark-surface: #1E293B;
  --dark-border: rgba(255,255,255,0.06);
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-full: 9999px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-glow: 0 4px 20px rgba(37,99,235,0.12);
}

/* --- Reset --- */
*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body {
  font-family: var(--font);
  color: var(--text-2);
  background: var(--bg);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width:100%; height:auto; display:block; }
a { color:inherit; text-decoration:none; }
button { border:none; background:none; cursor:pointer; font-family:inherit; }
ul,ol { list-style:none; }

/* --- Typography --- */
h1,h2,h3,h4,h5,h6 {
  font-family: var(--font);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-1);
}
h1 { font-size: clamp(2rem, 4.5vw, 3.25rem); font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); font-weight: 700; letter-spacing: -0.01em; }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.125rem; font-weight: 600; }

p {
  max-width: 62ch;
  line-height: 1.8;
  color: var(--text-3);
  font-size: 0.9375rem;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--s6);
}
.section { padding: var(--s20) 0; }
.section-sm { padding: var(--s16) 0; }

.grid { display:grid; gap:var(--s6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

.flex { display:flex; align-items:center; }
.flex-col { flex-direction:column; }
.flex-wrap { flex-wrap:wrap; }
.gap-sm { gap:var(--s2); }
.gap-md { gap:var(--s4); }
.gap-lg { gap:var(--s5); }
.gap-xl { gap:var(--s6); }
.gap-2xl { gap:var(--s8); }
.items-start { align-items:flex-start; }
.items-center { align-items:center; }
.justify-center { justify-content:center; }
.justify-between { justify-content:space-between; }
.justify-end { justify-content:flex-end; }
.text-center { text-align:center; }

/* --- Header --- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-h);
  transition: background var(--ease), box-shadow var(--ease);
}
.header--transparent { background: transparent; }
.header--solid {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border);
}
.header--dark {
  background: rgba(15,23,42,0.92);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--s6);
}

/* --- Logo --- */
.logo {
  display: flex;
  align-items: center;
  gap: 0;
  z-index: 1001;
  text-decoration: none;
  line-height: 1;
}
.logo-en {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--brand-red);
  letter-spacing: -0.08em;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1;
  transform: scaleX(1.5);
  transform-origin: left center;
  display: inline-block;
  padding-right: 2.5rem;
}
.logo-cn {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: 0.02em;
  line-height: 1;
  margin-left: 0;
  font-family: 'SimHei', 'Microsoft YaHei', sans-serif;
}
.header--transparent .logo-cn,
.header--dark .logo-cn { color: var(--white); }

/* --- Nav --- */
.nav { display:flex; align-items:center; gap:var(--s5); }
.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-3);
  transition: color var(--ease);
  position: relative;
  padding: var(--s1) 0;
}
.nav-link:hover { color: var(--text-1); }
.header--transparent .nav-link,
.header--dark .nav-link { color: rgba(255,255,255,0.7); }
.header--transparent .nav-link:hover,
.header--dark .nav-link:hover { color: var(--white); }

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1.5px;
  background: var(--primary);
  transition: width var(--ease);
}
.nav-link:hover::after { width: 100%; }

/* Active nav — blue on solid header, white on transparent/dark header for contrast */
.nav-active {
  color: var(--primary) !important;
  font-weight: 600;
}
.nav-active::after {
  width: 100% !important;
  background: var(--primary) !important;
}
.header--solid .nav-active { color: var(--primary) !important; }
.header--transparent .nav-active,
.header--dark .nav-active { color: var(--white) !important; }
.header--transparent .nav-active::after,
.header--dark .nav-active::after { background: var(--white) !important; }

/* Nav dropdown — Mega Menu */
.nav-item { position: relative; }
.nav-dropdown {
  position: absolute;
  top: 100%; left: 50%;
  transform: translateX(-50%) translateY(6px);
  background: var(--white);
  border-radius: var(--r-xl);
  box-shadow: 0 8px 40px rgba(0,0,0,0.12);
  border: 1px solid var(--border);
  padding: 0;
  width: 680px;
  opacity: 0; visibility: hidden;
  transition: all 250ms ease;
  z-index: 100;
  overflow: hidden;
  display: flex;
}
.nav-item:hover .nav-dropdown {
  opacity: 1; visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Mega menu: promo card (left) */
.mega-promo {
  width: 240px;
  flex-shrink: 0;
  background: linear-gradient(135deg, #122240 0%, #0d47a1 60%, #1565c0 100%);
  padding: var(--s6);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  text-decoration: none;
}
.mega-promo::before {
  content: '';
  position: absolute;
  width: 160px; height: 160px;
  background: radial-gradient(circle, rgba(255,255,255,0.06), transparent 70%);
  border-radius: 50%;
  top: -40px; right: -40px;
  pointer-events: none;
}
.mega-promo::after {
  content: '';
  position: absolute;
  width: 100px; height: 100px;
  background: radial-gradient(circle, rgba(37,99,235,0.1), transparent 70%);
  border-radius: 50%;
  bottom: -20px; left: -20px;
  pointer-events: none;
}
.mega-promo-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  background: rgba(229,57,53,0.2);
  border: 1px solid rgba(229,57,53,0.3);
  border-radius: var(--r-full);
  color: #F87171;
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--s4);
  width: fit-content;
}
.mega-promo-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.4;
  margin-bottom: var(--s2);
}
.mega-promo-desc {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.6;
  margin-bottom: var(--s5);
}
.mega-promo-stats {
  display: flex;
  gap: var(--s3);
}
.mega-promo-stat {
  text-align: center;
}
.mega-promo-stat-num {
  font-size: 1.125rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}
.mega-promo-stat-label {
  font-size: 0.625rem;
  color: rgba(255,255,255,0.45);
  margin-top: 2px;
}
.mega-promo-cta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: var(--s5);
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  padding: 6px 16px;
  background: var(--primary);
  border-radius: var(--r-full);
  transition: background var(--ease);
  width: fit-content;
}
.mega-promo-cta:hover { background: var(--primary-darker); }

/* Mega menu: product list (right) */
.mega-products {
  flex: 1;
  padding: var(--s5) var(--s6);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 var(--s6);
}
.mega-group {}
.mega-group-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-2);
  letter-spacing: 0.04em;
  padding-bottom: var(--s2);
  margin-bottom: var(--s2);
  border-bottom: 2px solid var(--text-1);
}
.mega-group-item {
  display: flex;
  align-items: center;
  gap: var(--s2);
  padding: var(--s2) var(--s3);
  border-radius: var(--r-sm);
  font-size: 0.8125rem;
  color: var(--text-3);
  transition: all var(--ease);
  text-decoration: none;
  white-space: nowrap;
}
.mega-group-item:hover {
  background: var(--bg-alt);
  color: var(--text-1);
}
.mega-group-item svg {
  flex-shrink: 0;
  opacity: 0.4;
  transition: opacity var(--ease);
}
.mega-group-item:hover svg {
  opacity: 1;
}

/* Mobile menu */
.mobile-toggle { display:none; flex-direction:column; gap:4px; width:24px; z-index:1001; }
.mobile-toggle span { display:block; height:1.5px; background:var(--text-1); border-radius:1px; transition:all var(--ease); }
.header--transparent .mobile-toggle span,
.header--dark .mobile-toggle span { background:var(--white); }
.mobile-toggle.active span:nth-child(1) { transform:rotate(45deg) translate(4px,4px); }
.mobile-toggle.active span:nth-child(2) { opacity:0; }
.mobile-toggle.active span:nth-child(3) { transform:rotate(-45deg) translate(4px,-4px); }

/* CTA button in nav */
.btn-demo {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 1.125rem;
  background: var(--primary);
  color: var(--white);
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--r-full);
  transition: background var(--ease);
}
.btn-demo:hover { background: var(--primary-darker); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s2);
  padding: 0.625rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--r-full);
  transition: all var(--ease);
  white-space: nowrap;
}
.btn-primary { background:var(--blue); color:var(--white); }
.btn-primary:hover { background:var(--blue-dark); }
.btn-outline { border:1px solid var(--border); color:var(--text-2); background:var(--white); }
.btn-outline:hover { border-color:var(--text-3); }
.btn-white { background:var(--white); color:var(--text-1); }
.btn-white:hover { background:var(--bg-alt); }
.btn-lg { padding:0.75rem 2rem; font-size:0.9375rem; }
.btn-sm { padding:0.375rem 1rem; font-size:0.8125rem; }

/* --- Cards — clean, minimal --- */
.card {
  background: var(--white);
  border-radius: var(--r-lg);
  padding: var(--s8);
  border: 1px solid var(--border);
  transition: border-color var(--ease), box-shadow var(--ease);
}
.card:hover {
  border-color: var(--text-4);
  box-shadow: var(--shadow-md);
}
.card-flat {
  background: var(--bg-alt);
  border: none;
  border-radius: var(--r-lg);
  padding: var(--s8);
}
.card-dark {
  background: var(--bg-dark-surface);
  border: 1px solid rgba(255,255,255,0.06);
  color: var(--white);
}

/* --- Badge — minimal pill --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.625rem;
  font-size: 0.6875rem;
  font-weight: 600;
  border-radius: var(--r-full);
  letter-spacing: 0.01em;
}
.badge-primary { background:var(--primary-50); color:var(--primary); }
.badge-accent { background:rgba(8,145,178,0.06); color:#0891B2; }
.badge-green { background:rgba(5,150,105,0.06); color:#059669; }
.badge-orange { background:rgba(234,88,12,0.06); color:#EA580C; }

/* --- Section Headers --- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--s2);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  margin-bottom: var(--s3);
}
.section-label::before {
  content: '';
  display: block;
  width: 20px; height: 2px;
  background: var(--primary);
}
.section-title { margin-bottom: var(--s3); }
.section-desc {
  font-size: 1rem;
  color: var(--text-3);
  max-width: 560px;
  line-height: 1.8;
}
.section-header { margin-bottom: var(--s10); }
.section-header.centered { text-align:center; }
.section-header.centered .section-desc { margin:0 auto; }
.section-header.centered .section-label { justify-content:center; }
.section-header.centered .section-label::before { display:none; }

/* --- Feature Card — with subtle accent --- */
.feature-card {
  padding: var(--s8);
  border-radius: var(--r-lg);
  background: var(--white);
  border: 1px solid var(--border);
  transition: border-color var(--ease);
}
.feature-card:hover {
  border-color: var(--text-4);
}
.feature-icon {
  width: 44px; height: 44px;
  border-radius: var(--r-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--s5);
  font-size: 1.25rem;
}
.feature-icon-blue { color:var(--blue); border-color:rgba(37,99,235,0.15); background:var(--blue-bg); }
.feature-icon-accent { color:#0891B2; border-color:rgba(8,145,178,0.15); }
.feature-icon-green { color:#059669; border-color:rgba(5,150,105,0.15); }
.feature-icon-orange { color:#EA580C; border-color:rgba(234,88,12,0.15); }
.feature-card h4 { margin-bottom:var(--s2); }
.feature-card p { font-size:0.875rem; line-height:1.7; }

/* --- Stat --- */
.stat-number {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  letter-spacing: -0.02em;
}
.stat-label {
  font-size: 0.8125rem;
  color: var(--text-3);
  margin-top: var(--s1);
}

/* --- Divider --- */
.divider { width:100%; height:1px; background:var(--divider); margin:var(--s8) 0; }

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--header-h);
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
}
.hero-bg-gradient {
  background: linear-gradient(135deg, #122240 0%, #0d47a1 50%, #1565c0 100%);
}
.hero-content {
  position: relative; z-index: 1;
  max-width: 680px;
}
.hero-content h1 {
  color: var(--white);
  font-size: clamp(2.75rem, 6.5vw, 5.25rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: var(--s4);
}
.hero-content .hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.625rem);
  font-weight: 400;
  line-height: 1.5;
  color: rgba(255,255,255,0.82);
  letter-spacing: 0.02em;
  margin-bottom: var(--s8);
}
.hero-content p {
  font-size: 1.0625rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--s8);
  max-width: 520px;
  line-height: 1.9;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--s2);
  padding: 0.375rem 0.875rem;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--r-full);
  color: rgba(255,255,255,0.7);
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: var(--s6);
}

/* --- Page Hero (Subpages) --- */
.page-hero {
  padding-top: calc(var(--header-h) + var(--s16));
  padding-bottom: var(--s16);
  background: linear-gradient(135deg, #122240 0%, #0d47a1 50%, #1565c0 100%);
  position: relative;
  overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.page-hero .section-label { color: rgba(255,255,255,0.5); }
.page-hero .section-label::before { background: rgba(255,255,255,0.3); }
.page-hero h1 { color:var(--white); }
.page-hero .section-desc { color:rgba(255,255,255,0.55); }

/* --- Timeline --- */
.timeline { position:relative; padding-left:var(--s10); }
.timeline::before {
  content:''; position:absolute;
  left:11px; top:0; bottom:0;
  width:1px; background:var(--border);
}
.timeline-item { position:relative; padding-bottom:var(--s8); }
.timeline-item:last-child { padding-bottom:0; }
.timeline-dot {
  position:absolute;
  left: calc(-1 * var(--s10) + 5px);
  top: 5px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid var(--white);
  box-shadow: 0 0 0 2px rgba(37,99,235,0.2);
}
.timeline-time {
  font-size: 0.8125rem; font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--s1);
  font-variant-numeric: tabular-nums;
}
.timeline-content h4 { margin-bottom:var(--s1); font-size:1rem; }
.timeline-content p { font-size:0.875rem; }

/* --- Data Table --- */
.data-table { width:100%; border-collapse:collapse; font-size:0.875rem; }
.data-table th {
  text-align:left;
  padding: var(--s3) var(--s5);
  background: var(--bg-alt);
  color: var(--text-2);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
}
.data-table td {
  padding: var(--s3) var(--s5);
  border-bottom: 1px solid var(--border-light);
  color: var(--text-3);
}
.data-table tr:hover td { background: var(--bg-alt); }

/* --- Dark Sections --- */
.bg-dark { background:var(--bg-dark); color:var(--white); }
.bg-dark h2,.bg-dark h3,.bg-dark h4 { color:var(--white); }
.bg-dark p { color:rgba(255,255,255,0.55); }
.bg-dark .section-label { color:rgba(255,255,255,0.45); }
.bg-dark .section-label::before { background:rgba(255,255,255,0.25); }
.bg-dark .divider { background:rgba(255,255,255,0.06); }

/* --- Architecture Diagram --- */
.arch-diagram {
  background: var(--bg-dark);
  border-radius: var(--r-xl);
  padding: var(--s10);
  border: 1px solid rgba(255,255,255,0.06);
}
.arch-layer {
  background: var(--bg-dark-surface);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--r-lg);
  padding: var(--s5);
  margin-bottom: var(--s4);
}
.arch-layer:last-child { margin-bottom:0; }
.arch-layer-title {
  font-size: 0.6875rem; font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--s3);
}
.arch-nodes { display:flex; gap:var(--s2); flex-wrap:wrap; }
.arch-node {
  padding: 0.375rem 0.75rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-sm);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.6);
  font-family: var(--font-mono);
}
.arch-arrow { text-align:center; color:var(--text-4); font-size:1rem; padding:var(--s1) 0; }

/* --- Particles --- */
.particles-canvas { position:absolute; inset:0; pointer-events:none; z-index:0; }

/* --- Gradient text --- */
.gradient-text {
  background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Glow Effects --- */
.glow-blue { position:relative; }
.glow-blue::before {
  content:''; position:absolute;
  width:400px; height:400px;
  background:radial-gradient(circle, rgba(37,99,235,0.06), transparent 70%);
  border-radius:50%; pointer-events:none;
  top:-200px; right:-100px;
}

/* --- Grid background --- */
.hero-bg-grid {
  background-image:
    linear-gradient(rgba(13,71,161,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13,71,161,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* --- Gradient border --- */
.gradient-border { position:relative; }
.gradient-border::before {
  content:''; position:absolute; inset:0;
  border-radius:inherit; padding:1px;
  background:linear-gradient(135deg, #2563EB, #1D4ED8);
  -webkit-mask:linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor; mask-composite:exclude;
  pointer-events:none;
}

/* --- Pattern dots --- */
.pattern-dots {
  background-image: radial-gradient(circle, var(--text-4) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* --- Scroll Animations — subtle --- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible { opacity:1; transform:translateY(0); }
.reveal-delay-1 { transition-delay:80ms; }
.reveal-delay-2 { transition-delay:160ms; }
.reveal-delay-3 { transition-delay:240ms; }
.reveal-delay-4 { transition-delay:320ms; }
.reveal-delay-5 { transition-delay:400ms; }

/* --- Footer --- */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.5);
  padding: var(--s16) 0 var(--s8);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--s10);
  margin-bottom: var(--s10);
}
.footer-brand p {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.4);
  margin-top: var(--s3);
  max-width: 280px;
  line-height: 1.7;
}
.footer-logo {
  display: flex; align-items: center; gap: 0;
  line-height: 1; margin-bottom: var(--s2);
}
.footer-logo-en {
  font-size: 1.5rem; font-weight: 700;
  color: var(--brand-red);
  letter-spacing: -0.08em;
  transform: scaleX(1.5);
  transform-origin: left center;
  display: inline-block;
  padding-right: 2.5rem;
}
.footer-logo-cn {
  font-size: 1.3rem; font-weight: 700;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.02em;
  margin-left: 0;
  font-family: 'SimHei', 'Microsoft YaHei', sans-serif;
}
.footer-col h5 {
  color: var(--white);
  font-size: 0.8125rem; font-weight: 600;
  margin-bottom: var(--s4);
  letter-spacing: 0.02em;
}
.footer-col a {
  display: block;
  padding: var(--s1) 0;
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.4);
  transition: color var(--ease);
}
.footer-col a:hover { color:rgba(255,255,255,0.8); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--s8);
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.25);
}

/* --- Agent Card --- */
.agent-card {
  background: var(--bg-dark-surface);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-lg);
  padding: var(--s6);
  transition: border-color var(--ease);
  position: relative;
}
.agent-card:hover {
  border-color: rgba(34,211,238,0.35);
}
.agent-tag {
  display: inline-flex; align-items: center;
  padding: 2px 8px;
  background: rgba(255,255,255,0.04);
  border-radius: var(--r-full);
  font-size: 0.6875rem;
  color: rgba(255,255,255,0.5);
  font-family: var(--font-mono);
}

/* --- Hardware Card --- */
.hardware-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  transition: border-color var(--ease), box-shadow var(--ease);
}
.hardware-card:hover {
  border-color: var(--text-4);
  box-shadow: var(--shadow-md);
}
.hardware-img {
  aspect-ratio: 4/3;
  background: var(--bg-alt);
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem; color: var(--text-4);
}
.hardware-body { padding:var(--s6); }
.hardware-specs { display:grid; grid-template-columns:1fr 1fr; gap:var(--s2); margin-top:var(--s3); }
.spec-item { font-size:0.75rem; color:var(--text-3); }
.spec-item strong { display:block; color:var(--text-2); font-weight:600; }

/* --- Breadcrumb --- */
.breadcrumb {
  display:flex; align-items:center; gap:var(--s2);
  font-size:0.8125rem; margin-bottom:var(--s5);
}
.breadcrumb a { color:rgba(255,255,255,0.4); transition:color var(--ease); }
.breadcrumb a:hover { color:rgba(255,255,255,0.7); }
.breadcrumb span { color:rgba(255,255,255,0.2); }
.breadcrumb .current { color:rgba(255,255,255,0.7); }

/* --- Contact Form --- */
.form-group { margin-bottom:var(--s4); }
.form-label {
  display:block; font-size:0.8125rem; font-weight:600;
  color:var(--text-2); margin-bottom:var(--s1);
}
.form-input {
  width:100%; padding:0.625rem 0.875rem;
  border:1px solid var(--border);
  border-radius: var(--r-md);
  font-size:0.875rem; font-family:inherit;
  color:var(--text-1);
  transition: border-color var(--ease);
  background:var(--white);
}
.form-input:focus {
  outline:none;
  border-color:var(--blue);
  box-shadow:0 0 0 2px rgba(37,99,235,0.08);
}
textarea.form-input { resize:vertical; min-height:100px; }

/* --- 表单提交反馈提示 --- */
.form-feedback {
  margin-top: var(--s1);
  padding: 0.7rem 0.9rem;
  border-radius: var(--r-md);
  font-size: 0.8125rem;
  font-weight: 500;
  text-align: center;
}
.form-feedback.success {
  background: #ecfdf5; color: #15803d;
  border: 1px solid #a7f3d0;
}
.form-feedback.error {
  background: #fef2f2; color: #b91c1c;
  border: 1px solid #fecaca;
}

/* --- Back to Top --- */
.back-to-top {
  position:fixed; bottom:var(--s6); right:var(--s6);
  width:40px; height:40px;
  background:var(--white);
  color:var(--text-2);
  border:1px solid var(--border);
  border-radius:var(--r-full);
  display:flex; align-items:center; justify-content:center;
  font-size:1rem;
  box-shadow:var(--shadow-md);
  opacity:0; visibility:hidden;
  transform:translateY(6px);
  transition:all var(--ease);
  z-index:999;
}
.back-to-top.visible { opacity:1; visibility:visible; transform:translateY(0); }
.back-to-top:hover { background:var(--bg-alt); }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .grid-6 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  :root { --header-h:60px; }
  .container { padding:0 var(--s4); }
  .section { padding:var(--s16) 0; }
  .section-sm { padding:var(--s10) 0; }
  .grid-2,.grid-3,.grid-4,.grid-5,.grid-6 { grid-template-columns:1fr; }
  .concept-flow { display:none; }
  .nav {
    position:fixed; top:0; right:-100%;
    width:80%; max-width:320px; height:100vh;
    background:var(--bg-dark-surface);
    flex-direction:column; align-items:stretch;
    overflow-y:auto; overflow-x:hidden;
    -webkit-overflow-scrolling:touch;
    padding:calc(var(--header-h) + var(--s5)) var(--s5) var(--s5);
    gap:var(--s2);
    transition:right var(--ease);
    box-shadow:var(--shadow-lg);
    z-index:1000;
  }
  .nav.active { right:0; }
  .nav::-webkit-scrollbar { width:4px; }
  .nav::-webkit-scrollbar-thumb { background:rgba(255,255,255,0.18); border-radius:2px; }
  .nav::-webkit-scrollbar-track { background:transparent; }
  .nav-link, .header--transparent .nav-link, .header--solid .nav-link, .header--dark .nav-link { font-size:0.9375rem; padding:var(--s2) 0; width:100%; color:var(--white) !important; }
  /* 产品中心子菜单：点击展开（JS 切换 .nav-item--open），透明融入深灰抽屉 */
  .nav-dropdown {
    position:static; transform:none; box-shadow:none;
    border:none; opacity:1; visibility:visible;
    padding:var(--s2) 0 var(--s2) var(--s4);
    display:none;
    width:100%; flex-direction:column; overflow:hidden;
    background:transparent;
  }
  .nav-item.nav-item--open .nav-dropdown { display:flex; }
  /* 覆盖桌面 hover 残留：移动端触摸点击后 :hover 会让子菜单 translateX(-50%) 向左平移出抽屉，强制归位 */
  .nav-item:hover .nav-dropdown { transform:none !important; opacity:1; visibility:visible; }
  /* 展开箭头（仅含子菜单的项，桌面隐藏） */
  .nav-caret { display:none; }
  .has-dropdown > .nav-link { display:flex; align-items:center; justify-content:space-between; }
  .has-dropdown > .nav-link .nav-caret { display:inline-block; }
  .nav-caret::after { content:'▾'; margin-left:var(--s2); font-size:0.7em; opacity:0.7; transition:transform var(--ease); }
  .nav-item--open > .nav-link .nav-caret { transform:rotate(180deg); }
  /* mega 卡片在深灰抽屉里：去掉白底，文字转浅色保证对比 */
  .mega-promo { width:100%; padding:var(--s4); border-radius:var(--r-md); }
  .mega-products { grid-template-columns:1fr; padding:0; gap:0; }
  .mega-group-title { color:rgba(255,255,255,0.55); border-bottom-color:rgba(255,255,255,0.12); }
  .mega-group-item { color:rgba(255,255,255,0.82); }
  .mega-group-item:hover { background:rgba(255,255,255,0.08); color:var(--white); }
  .mega-group-item:hover svg { opacity:0.9; }
  /* 严格约束在抽屉内：菜单项与子菜单铺满抽屉宽，长产品名允许换行、子项允许收缩，绝不撑出边界 */
  .nav-item { width:100%; }
  .nav-dropdown, .mega-promo, .mega-products, .mega-group-item { min-width:0; }
  .mega-group-item { white-space:normal !important; word-break:break-word; }
  /* 抽屉内链接聚焦时去掉默认 outline，避免描边画到抽屉外侧"出界"；反馈用 hover 背景色承担 */
  .nav a:focus, .nav a:focus-visible { outline:none; box-shadow:none; -webkit-tap-highlight-color:transparent; }
  .mobile-toggle { display:flex; }
  /* 蓝底抽屉：当前页高亮文字与下划线统一用白色，保证对比清晰（LOGO 无需变色） */
  .nav-active { color: var(--white) !important; }
  .nav-active::after { background: var(--white) !important; }
  /* 抽屉展开时叉号（关闭按钮）转白，深灰底上始终清晰；关闭态汉堡维持各页原配色 */
  .header:has(.nav.active) .mobile-toggle span { background: var(--white) !important; }
  .footer-grid { grid-template-columns:1fr; gap:var(--s8); }
  .footer-bottom { flex-direction:column; gap:var(--s2); text-align:center; }
  .hero-content h1 { font-size:1.75rem; }
  .hero-content p { font-size:0.9375rem; }
  .stat-number { font-size:1.75rem; }
  .page-hero { padding-top:calc(var(--header-h) + var(--s8)); padding-bottom:var(--s8); }
  /* 内联网格/flex 强制降列规则已移除：其 :not(看板*) 排除依赖 Selectors Level 4，
     部分移动 webview 不支持，反而误把看板内部网格降为单列、flex 换行。
     页面所有内联 grid/flex 都在看板内部，看板整体 zoom 已处理适配；
     非看板布局用 .grid 响应式类，由上方媒体查询兜底。 */
  /* 配图看板（数据看板）：整体当作一张图等比缩放到屏宽，内部保持桌面设计、不重排不拆解 */
  [style*="background:var(--dark-bg)"][style*="dark-border"] { width:552px !important; max-width:none !important; zoom:calc((100vw - 2rem) / 552); }
  /* 手机展示看板（三机叠放）：同样整体等比缩放至屏宽，内部不拆解 */
  [style*="min-height:560px"][style*="display:flex"][style*="justify-content:center"] { width:552px !important; max-width:none !important; zoom:calc((100vw - 2rem) / 552); }
  /* 兜底：section 与根元素禁止横向溢出，任何内部浮层/装饰超出都被裁剪 */
  section { overflow-x:hidden; }
  html, body { overflow-x:hidden; max-width:100vw; }
}
@media (max-width: 480px) {
  .container { padding:0 var(--s4); }
  .hero { min-height:90vh; }
}

/* --- Animations --- */
@keyframes fadeIn { from{opacity:0} to{opacity:1} }
@keyframes slideUp { from{opacity:0;transform:translateY(16px)} to{opacity:1;transform:translateY(0)} }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.5} }
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-6px)} }
@keyframes shimmer { 0%{background-position:-200% 0} 100%{background-position:200% 0} }
/* 俯视地图行驶车辆 */
@keyframes driveR { 0%{left:-8%} 100%{left:106%} }
@keyframes driveL { 0%{left:106%} 100%{left:-8%} }
.map-car { position:absolute; height:auto; z-index:3; filter:drop-shadow(0 1px 2px rgba(0,0,0,0.6)); pointer-events:none }
.map-car--r { animation: driveR 18s linear infinite }
.map-car--l { animation: driveL 22s linear infinite }
@media (prefers-reduced-motion: reduce){ .map-car--r, .map-car--l { animation:none } }

.animate-fade { animation: fadeIn 0.5s ease forwards; }
.animate-slide { animation: slideUp 0.5s ease forwards; }
.animate-float { animation: float 3s ease-in-out infinite; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }

/* --- Feature icon colored variants --- */
.feature-icon-blue { color:var(--blue); background:rgba(37,99,235,0.08); }
.feature-icon-accent { color:#0891B2; background:rgba(8,145,178,0.08); }
.feature-icon-green { color:#059669; background:rgba(5,150,105,0.08); }
.feature-icon-orange { color:#EA580C; background:rgba(234,88,12,0.08); }
.feature-icon-red { color:var(--primary); background:var(--primary-50); }

/* --- Card hover with lift (for interactive cards) --- */
.card-lift { transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease); }
.card-lift:hover { transform:translateY(-3px); box-shadow:var(--shadow-lg); }

/* --- Card with top accent bar --- */
.card-accent-blue { border-top: 2px solid var(--blue); }
.card-accent-accent { border-top: 2px solid #0891B2; }
.card-accent-green { border-top: 2px solid #059669; }
.card-accent-orange { border-top: 2px solid #EA580C; }
.card-accent-red { border-top: 2px solid var(--primary); }

/* --- Back to top brand variant --- */
.back-to-top-brand { background:var(--primary); color:var(--white); border:none; }
.back-to-top-brand:hover { background:var(--primary-darker); }

/* --- CTA Section Gradient --- */
.cta-gradient {
  background: linear-gradient(135deg, #122240 0%, #0d47a1 40%, #1565c0 100%);
  text-align: center;
  color: #fff;
}
.cta-gradient h2 { color: #fff; }
.cta-gradient p { color: rgba(255,255,255,0.7); }