/* ============================================
   Schnell AI+ 迅灵 — Premium Corporate Website
   Design System & Core Styles
   ============================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Brand Colors */
  --brand-blue: #0066FF;
  --brand-blue-light: #3385FF;
  --brand-blue-dark: #0044CC;
  --brand-cyan: #00D4FF;
  --brand-gradient: linear-gradient(135deg, #0066FF 0%, #00D4FF 100%);
  --brand-gradient-hover: linear-gradient(135deg, #0055EE 0%, #00C4EF 100%);

  /* Dark Theme (Default) */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --bg-glass-hover: rgba(255, 255, 255, 0.08);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 102, 255, 0.3);
  --shadow-color: rgba(0, 0, 0, 0.4);

  /* Spacing */
  --section-padding: 100px 0;
  --container-max: 1200px;

  /* Typography */
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Transitions */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s var(--ease-out-expo);
  --transition-base: 0.35s var(--ease-out-expo);
  --transition-slow: 0.6s var(--ease-out-expo);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-glass: rgba(0, 0, 0, 0.02);
  --bg-glass-hover: rgba(0, 0, 0, 0.05);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-glow: rgba(0, 102, 255, 0.2);
  --shadow-color: rgba(0, 0, 0, 0.08);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}

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

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

ul, ol {
  list-style: none;
}

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

.section {
  padding: var(--section-padding);
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--brand-blue);
  margin-bottom: 16px;
  padding: 6px 16px;
  background: rgba(0, 102, 255, 0.1);
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 102, 255, 0.2);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-title .gradient-text {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.8;
}

/* --- Glass Morphism Card --- */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.glass-card:hover {
  background: var(--bg-glass-hover);
  border-color: var(--border-glow);
  box-shadow: 0 8px 40px rgba(0, 102, 255, 0.12);
  transform: translateY(-4px);
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition-base);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 0;
  box-shadow: 0 4px 30px var(--shadow-color);
}

[data-theme="light"] .navbar.scrolled {
  background: rgba(255, 255, 255, 0.88);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 1001;
}

.nav-logo img {
  height: 42px;
  width: auto;
  transition: transform var(--transition-base);
}

.nav-logo:hover img {
  transform: scale(1.05);
}

.nav-logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand-gradient);
  transition: width var(--transition-base);
  border-radius: 2px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-glass);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.15rem;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--bg-glass-hover);
  color: var(--brand-blue);
  border-color: var(--border-glow);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: var(--brand-gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0, 102, 255, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 6px 30px rgba(0, 102, 255, 0.5);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--brand-blue);
  background: rgba(0, 102, 255, 0.08);
}

/* Mobile Menu */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
  padding: 4px;
  background: none;
  border: none;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.mobile-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }

  .nav-links,
  .nav-actions .btn {
    display: none;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    padding: 100px 32px 40px;
    gap: 24px;
    animation: fadeInUp 0.4s ease forwards;
  }

  .nav-links.open a {
    font-size: 1.2rem;
  }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 102, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 102, 255, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.4;
  animation: floatOrb 20s ease-in-out infinite;
}

.hero-glow-orb-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 102, 255, 0.3), transparent 70%);
  top: -200px;
  right: -100px;
}

.hero-glow-orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.2), transparent 70%);
  bottom: -100px;
  left: -100px;
  animation-delay: -10s;
}

@keyframes floatOrb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(0, 102, 255, 0.1);
  border: 1px solid rgba(0, 102, 255, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--brand-cyan);
  margin-bottom: 28px;
  animation: fadeInUp 0.6s ease forwards;
  opacity: 0;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--brand-cyan);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(2.4rem, 5.5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  animation: fadeInUp 0.7s ease 0.1s forwards;
  opacity: 0;
}

.hero-title .highlight {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title-line2 {
  white-space: nowrap;
}

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

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 560px;
  animation: fadeInUp 0.7s ease 0.2s forwards;
  opacity: 0;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.7s ease 0.3s forwards;
  opacity: 0;
}

.hero-cta-btn {
  padding: 16px 36px;
  font-size: 1rem;
  position: relative;
  overflow: hidden;
}

.hero-cta-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255,255,255,0.15), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.hero-cta-btn:hover::before {
  transform: translateX(100%);
}

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
  animation: fadeInUp 0.7s ease 0.4s forwards;
  opacity: 0;
}

.hero-stat-item {
  text-align: left;
}

.hero-stat-number {
  font-size: 2rem;
  font-weight: 800;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.hero-stat-label {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Hero Visual / 3D Effect Area */
.hero-visual {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 1s ease 0.5s forwards;
  opacity: 0;
}

.hero-dashboard-mockup {
  width: 100%;
  max-width: 560px;
  aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  overflow: hidden;
  position: relative;
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.3),
    0 0 80px rgba(0, 102, 255, 0.08);
}

.dashboard-inner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
}

.dashboard-bar {
  height: 36px;
  background: rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 8px;
}

.db-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.db-dot-red { background: #ff5f57; }
.db-dot-yellow { background: #febc2e; }
.db-dot-green { background: #28c840; }

.dashboard-content {
  flex: 1;
  padding: 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.db-chart-placeholder {
  border-radius: var(--radius-sm);
  background: rgba(0, 102, 255, 0.06);
  border: 1px solid rgba(0, 102, 255, 0.1);
  display: flex;
  align-items: flex-end;
  padding: 16px;
  gap: 6px;
}

.db-bar {
  flex: 1;
  background: var(--brand-gradient);
  border-radius: 4px 4px 0 0;
  opacity: 0.7;
  animation: barGrow 2s ease-in-out infinite alternate;
}
.db-bar:nth-child(1) { height: 40%; animation-delay: 0s; }
.db-bar:nth-child(2) { height: 65%; animation-delay: 0.2s; }
.db-bar:nth-child(3) { height: 45%; animation-delay: 0.4s; }
.db-bar:nth-child(4) { height: 80%; animation-delay: 0.6s; }
.db-bar:nth-child(5) { height: 55%; animation-delay: 0.8s; }
.db-bar:nth-child(6) { height: 70%; animation-delay: 1s; }

@keyframes barGrow {
  0% { opacity: 0.5; }
  100% { opacity: 0.95; }
}

.db-list-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: rgba(0, 102, 255, 0.04);
  border: 1px solid rgba(0, 102, 255, 0.08);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.db-list-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ============================================
   PRODUCTS SECTION
   ============================================ */
.products {
  background: var(--bg-secondary);
  position: relative;
}

.products::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 1px;
  background: var(--brand-gradient);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.product-card {
  display: flex;
  flex-direction: column;
  text-align: center;
  padding: 40px 28px;
  position: relative;
  overflow: hidden;
}

/* 产品卡片作为链接时的样式 */
.products-grid .product-card,
.opc-features .opc-feature-item {
  cursor: pointer;
  text-decoration: none !important;
  color: inherit !important;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--brand-gradient);
  border-radius: 0 0 4px 4px;
  opacity: 0;
  transition: all var(--transition-base);
}

.product-card:hover::before {
  opacity: 1;
  width: 120px;
}

.product-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 22px;
  border-radius: var(--radius-lg);
  background: rgba(0, 102, 255, 0.08);
  border: 1px solid rgba(0, 102, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  transition: all var(--transition-base);
  color: var(--brand-blue);
}

.product-card:hover .product-icon {
  background: var(--brand-gradient);
  color: #fff;
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 8px 30px rgba(0, 102, 255, 0.35);
}

.product-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.product-name-en {
  font-size: 0.82rem;
  color: var(--brand-blue);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
  min-height: 2.5em;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  line-height: 1.2;
}

.product-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex-grow: 1;
}

.product-tag {
  display: inline-block;
  margin-top: 16px;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 600;
  background: rgba(0, 102, 255, 0.08);
  color: var(--brand-blue);
  border: 1px solid rgba(0, 102, 255, 0.15);
  align-self: center;
}

/* ============================================
   PRODUCT FEATURE (迅灵Ai 旗舰推荐)
   ============================================ */
.product-feature {
  grid-column: 1 / -1;
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px 32px;
  padding: 32px 40px;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0, 102, 255, 0.12);
  background: linear-gradient(135deg, #e8f4ff 0%, #d6ecff 40%, #c2e2ff 100%);
  box-shadow: 0 20px 50px -20px rgba(0, 102, 255, 0.22);
  color: #0a2540;
}

.product-feature::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 85% 20%, rgba(0, 212, 255, 0.18), transparent 55%);
  pointer-events: none;
}

.product-feature-badge {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 4px 12px;
  border-radius: 999px;
  color: #0052cc;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(0, 102, 255, 0.18);
}

.product-feature-main {
  display: flex;
  align-items: center;
  gap: 20px;
  flex: 1;
  min-width: 0;
}

.product-feature-icon {
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(0, 102, 255, 0.12);
  box-shadow: 0 8px 20px rgba(0, 102, 255, 0.08);
}

.product-feature-text {
  min-width: 0;
}

.product-feature-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: #003366;
  text-shadow: none;
}

.product-feature-desc {
  font-size: 0.95rem;
  color: #334e68;
  line-height: 1.6;
  max-width: 52ch;
  text-shadow: none;
}

.product-feature-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  text-decoration: none;
  background: linear-gradient(120deg, #0066ff, #00aaff);
  border: 1px solid rgba(0, 102, 255, 0.2);
  box-shadow: 0 10px 30px -8px rgba(0, 102, 255, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  white-space: nowrap;
}

.product-feature-btn:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 16px 38px -8px rgba(0, 102, 255, 0.45);
  background: linear-gradient(120deg, #0052cc, #0099dd);
}

.product-feature-btn .arrow {
  transition: transform var(--transition-fast);
}

.product-feature-btn:hover .arrow {
  transform: translateX(4px);
}

.product-feature-stats {
  display: flex;
  gap: 28px;
  margin-top: 18px;
}

.pf-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.pf-stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1;
  color: #0066ff;
  text-shadow: none;
}

.pf-stat-label {
  font-size: 0.78rem;
  color: #4a6782;
}

/* 变体：SchnellAI 创意工坊（紫色调创意感，与数字员工蓝调区分） */
.product-feature--creative {
  background: linear-gradient(135deg, #f3eaff 0%, #e8defb 42%, #dcc9f7 100%);
  border-color: rgba(124, 77, 255, 0.20);
  box-shadow: 0 20px 50px -20px rgba(124, 77, 255, 0.25);
}

.product-feature--creative::before {
  background: radial-gradient(circle at 85% 20%, rgba(214, 51, 255, 0.16), transparent 55%);
}

.product-feature--creative .product-feature-badge {
  color: #6a2bd9;
  border-color: rgba(124, 77, 255, 0.22);
}

.product-feature--creative .product-feature-name {
  color: #3a1a6b;
}

.product-feature--creative .product-feature-desc {
  color: #4a3a66;
}

.product-feature--creative .product-feature-btn {
  background: linear-gradient(120deg, #7c4dff, #b14dff);
  box-shadow: 0 10px 30px -8px rgba(124, 77, 255, 0.40);
}

.product-feature--creative .product-feature-btn:hover {
  background: linear-gradient(120deg, #6a2bd9, #9a3df0);
  box-shadow: 0 16px 38px -8px rgba(124, 77, 255, 0.50);
}

.product-feature--creative .pf-stat-num {
  color: #7c4dff;
}

.product-feature-depts {
  flex: 1 1 100%;
  margin-top: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.pf-dept {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 14px 10px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(0, 102, 255, 0.1);
  text-align: center;
  transition: all var(--transition-fast);
}

.pf-dept:hover {
  transform: translateY(-3px);
  background: #fff;
  box-shadow: 0 12px 24px -10px rgba(0, 102, 255, 0.25);
}

.pf-dept-icon {
  font-size: 1.4rem;
}

.pf-dept-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: #0a2540;
}

.pf-dept-count {
  font-size: 0.72rem;
  color: #3a5a7a;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(0, 102, 255, 0.1);
}

/* ============================================
   OPC SERVICE CENTER SECTION
   ============================================ */
.opc-section {
  position: relative;
  overflow: hidden;
}

.opc-bg-line {
  position: absolute;
  bottom: 20%;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand-cyan), var(--brand-blue), transparent);
  opacity: 0.3;
}

.opc-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.opc-content {
  position: relative;
  z-index: 2;
}

.opc-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--brand-cyan);
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.opc-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.opc-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 480px;
}

.opc-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 36px;
}

.opc-feature-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 18px;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  transition: all var(--transition-base);
}

.opc-feature-item:hover {
  background: var(--bg-glass-hover);
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

.opc-feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(0, 102, 255, 0.1);
  border: 1px solid rgba(0, 102, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
  color: var(--brand-blue);
}

.opc-feature-text h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 3px;
}

.opc-feature-text p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.opc-visual {
  position: relative;
  z-index: 2;
}

.opc-mockup-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.3),
    0 0 100px rgba(0, 102, 255, 0.06);
}

.opc-mockup-img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(0, 212, 255, 0.05));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: rgba(0, 102, 255, 0.15);
}

.opc-float-badge {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 28px;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  font-size: 0.88rem;
  font-weight: 600;
  white-space: nowrap;
  color: var(--brand-cyan);
}

[data-theme="light"] .opc-float-badge {
  background: rgba(255, 255, 255, 0.9);
}

/* ============================================
   WHY CHOOSE US / FEATURES
   ============================================ */
.features {
  background: var(--bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}

.feature-card {
  padding: 36px 28px;
  position: relative;
}

.feature-number {
  font-size: 3rem;
  font-weight: 900;
  color: rgba(0, 102, 255, 0.08);
  position: absolute;
  top: 16px;
  right: 24px;
  line-height: 1;
}

.feature-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 102, 255, 0.25);
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   ABOUT / CTA BANNER
   ============================================ */
.cta-banner {
  position: relative;
  overflow: hidden;
  padding: 80px 0;
}

.cta-banner-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.15), rgba(0, 212, 255, 0.08));
  z-index: 0;
}

.cta-banner .container {
  position: relative;
  z-index: 1;
  text-align: center;
}

.cta-banner h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.cta-banner p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand {
  max-width: 300px;
}

.footer-brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand-logo img {
  height: 38px;
}

.footer-brand-logo span {
  font-size: 1.15rem;
  font-weight: 800;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-col ul li a:hover {
  color: var(--brand-blue);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
  font-size: 0.84rem;
  color: var(--text-muted);
}

.icp-beian {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  transition: all var(--transition-fast);
}

.icp-beian:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  color: var(--brand-blue);
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .opc-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 64px 0;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .products-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .product-card {
    padding: 28px 18px;
  }

  .product-feature {
    padding: 28px 24px;
  }

  .product-feature-btn {
    width: auto;
    padding: 12px 24px;
  }

  .product-feature-stats {
    gap: 22px;
  }

  .pf-stat-num {
    font-size: 1.5rem;
  }

  .product-feature-depts {
    grid-template-columns: repeat(3, 1fr);
  }

  .opc-features {
    grid-template-columns: 1fr;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .hero-visual {
    display: none;
  }

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

  .hero-stats {
    gap: 28px;
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .products-grid {
    grid-template-columns: 1fr;
  }

  .product-feature {
    padding: 24px 18px;
    gap: 18px 24px;
  }

  .product-feature-main {
    gap: 14px;
  }

  .product-feature-icon {
    width: 52px;
    height: 52px;
    font-size: 1.6rem;
  }

  .product-feature-name {
    font-size: 1.3rem;
  }

  .product-feature-desc {
    font-size: 0.88rem;
  }

  .product-feature-btn {
    padding: 12px 20px;
    font-size: 0.92rem;
  }

  .product-feature-stats {
    gap: 18px;
    margin-top: 14px;
  }

  .pf-stat-num {
    font-size: 1.35rem;
  }

  .product-feature-depts {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .hero-cta-btn {
    justify-content: center;
  }
}

/* ============================================
   CONTACT MODAL (联系我们弹窗)
   ============================================ */
.contact-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s var(--ease-out-expo), visibility 0.35s;
}

.contact-modal.open {
  opacity: 1;
  visibility: visible;
}

.contact-modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(5, 8, 16, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

[data-theme="light"] .contact-modal-overlay {
  background: rgba(15, 23, 42, 0.45);
}

.contact-modal-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-xl);
  padding: 40px 32px 32px;
  text-align: center;
  transform: translateY(20px) scale(0.96);
  transition: transform 0.4s var(--ease-out-expo);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

.contact-modal.open .contact-modal-card {
  transform: translateY(0) scale(1);
}

.contact-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--bg-glass);
  color: var(--text-secondary);
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s var(--ease-out-expo);
}

.contact-modal-close:hover {
  color: var(--text-primary);
  border-color: var(--border-glow);
  transform: rotate(90deg);
}

.contact-modal-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 20px;
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  box-shadow: 0 8px 30px rgba(0, 102, 255, 0.35);
}

.contact-modal-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.contact-modal-sub {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.6;
}

.contact-modal-items {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-modal-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  text-align: left;
  text-decoration: none !important;
  color: inherit !important;
  transition: all 0.25s var(--ease-out-expo);
}

.contact-modal-item:hover {
  background: var(--bg-glass-hover);
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

.contact-modal-item-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: rgba(0, 102, 255, 0.1);
  border: 1px solid rgba(0, 102, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.contact-modal-item-body {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.contact-modal-item-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.contact-modal-item-value {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.contact-modal-item-action {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-blue);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(0, 102, 255, 0.1);
  border: 1px solid rgba(0, 102, 255, 0.2);
  transition: all 0.2s ease;
}

.contact-modal-item:hover .contact-modal-item-action {
  background: var(--brand-gradient);
  color: #fff;
  border-color: transparent;
}

@media (max-width: 480px) {
  .contact-modal-card {
    padding: 32px 22px 24px;
  }
  .contact-modal-item-action {
    display: none;
  }
}