/* 牛兴胜 ICALF Website - Global Styles */

/* ============================================
   CSS Variables (Design Tokens)
   ============================================ */
:root {
  /* Colors */
  --primary-color: #2563EB;
  --primary-dark: #1E40AF;
  --primary-light: #3B82F6;
  --secondary-color: #F97316;
  --secondary-dark: #EA580C;
  --background-color: #FFFFFF;
  --background-light: #F9FAFB;
  --bg-secondary: #F9FAFB;
  --text-primary: #1F2937;
  --text-color: #1F2937;
  --text-secondary: #6B7280;
  --text-light: #9CA3AF;
  --border-color: #E5E7EB;
  --success-color: #10B981;
  --error-color: #EF4444;
  --warning-color: #F59E0B;

  /* Typography */
  --font-family-primary: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-family-code: 'Fira Code', 'Monaco', monospace;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

/* ============================================
   Reset & Base Styles
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-family-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background-color);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 2.25rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

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

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

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

/* ============================================
   Container & Layout
   ============================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

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

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

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

/* ============================================
   Header & Navigation
   ============================================ */
.header {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0 1rem;
}
.header .container { max-width: 1200px; }

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}
.logo {
  display: flex;
  align-items: center;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}
.logo img { height: 36px; margin-right: 10px; }

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
  margin: 0;
}
.nav-menu a {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  position: relative;
  text-decoration: none;
  transition: color .2s;
}
.nav-menu a:hover, .nav-menu a.active { color: var(--primary-color); }
.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--primary-color);
  border-radius: 1px;
  transition: width .25s;
}
.nav-menu a:hover::after, .nav-menu a.active::after { width: 100%; }

/* Language Switcher */
.lang-switcher {
  display: flex;
  gap: var(--spacing-sm);
  margin-left: var(--spacing-lg);
}

.lang-switcher a {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
}

.lang-switcher a.active {
  background-color: var(--primary-color);
  color: white;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-primary);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-cta {
  background-color: var(--secondary-color);
  color: white;
  font-size: 1.125rem;
  padding: var(--spacing-lg) var(--spacing-2xl);
}

.btn-cta:hover {
  background-color: var(--secondary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: 1.125rem;
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, #7C3AED 50%, var(--primary-dark) 100%);
  color: white;
  padding: var(--spacing-3xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.05) 0%, transparent 50%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -30%; right: -15%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 65%);
  border-radius: 50%;
  pointer-events: none;
}

/* Hero variants for different pages - 统一使用主色调但不同渐变效果 */
.hero-contact {
  background: linear-gradient(135deg, #10B981 0%, #059669 100%);
}

.hero-help {
  background: linear-gradient(135deg, #8B5CF6 0%, #7C3AED 100%);
}

.hero-about {
  background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
}

.hero-pricing {
  /* 吸引用户购买欲的橘红色渐变背景 */
  background: linear-gradient(135deg, #FF6B35 0%, #F7931E 100%);
}

.hero-download {
  background: linear-gradient(135deg, #06B6D4 0%, #0891B2 100%);
}

.hero-features {
  /* 使用主色调但添加光影效果 */
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 50%, var(--primary-light) 100%);
  position: relative;
  overflow: hidden;
}

.hero-features::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

.hero h1 {
  color: white;
  font-size: 3.5rem;
  margin-bottom: var(--spacing-lg);
}

.hero p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-2xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   Features Grid
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

/* 推荐硬件（6卡）：3列桌面 / 2列平板 / 1列手机 */
.hardware-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

/* 推荐硬件（4卡）：2列桌面 / 2列平板 / 1列手机 */
.hw-grid-4 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

/* 产品网格：固定4列，2行8个平衡布局 */
.products-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}
@media (max-width: 1024px) { .products-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .products-grid { grid-template-columns: 1fr; } }

/* ============================================
   Advantage Grid (3列优势) + Product List (2列长方形)
   ============================================ */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.advantage-card {
  text-align: center;
  padding: 2.5rem 2rem;
  border-radius: 12px;
  background: #fff;
  border: 1px solid #f0f0f0;
  transition: transform .2s, box-shadow .2s;
}
.advantage-card:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,0,0,0.08); }
.advantage-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.advantage-card h3 { font-size: 1.2rem; margin-bottom: 0.75rem; color: #1a1a2e; }
.advantage-card p { font-size: 0.95rem; color: #555; line-height: 1.7; }

.product-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.product-item {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 1.75rem 1.5rem;
  background: #fff;
  border-radius: 10px;
  border: 1px solid #eef0f2;
  text-decoration: none;
  transition: transform .2s, box-shadow .2s;
}
.product-item:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(0,0,0,0.06); }
.product-item .product-icon { font-size: 2.2rem; flex-shrink: 0; width: 3rem; text-align: center; padding-top: 0.2rem; }
.product-item strong { display: block; font-size: 1.05rem; color: #1a1a2e; margin-bottom: 0.5rem; }
.product-item p { font-size: 0.92rem; color: #666; line-height: 1.65; margin: 0 0 0.75rem 0; }
.product-tags { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.product-tags span {
  display: inline-block; padding: 3px 10px;
  background: #f0f4ff; color: #2563eb;
  border-radius: 20px; font-size: 0.78rem;
}

@media (max-width: 768px) {
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .product-list { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .advantage-grid { grid-template-columns: 1fr; }
}

.feature-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.feature-card h3 {
  margin-bottom: var(--spacing-md);
}

/* ============================================
   Pricing Table
   ============================================ */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
}

.pricing-card {
  background: white;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  position: relative;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.pricing-card.featured {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured::before {
  content: '推荐';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-xs) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
}

.pricing-header {
  margin-bottom: var(--spacing-lg);
}

.pricing-header h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.5rem;
  white-space: nowrap;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary-color);
  margin: var(--spacing-lg) 0;
}

.pricing-price span {
  font-size: 1.25rem;
  color: var(--text-secondary);
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin: var(--spacing-xl) 0;
  flex-grow: 1;
}

.pricing-features li {
  padding: var(--spacing-sm) 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
  word-break: break-word;
  overflow-wrap: break-word;
}

.pricing-features li::before {
  content: '✓';
  color: var(--success-color);
  font-weight: 700;
  margin-right: var(--spacing-sm);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background-color: var(--text-primary);
  color: white;
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
  margin-top: var(--spacing-3xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

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

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-sm);
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   Cards & Components
   ============================================ */
.card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.card-header {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

/* ============================================
   FAQ Styles
   ============================================ */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.faq-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.faq-question {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--primary-color);
  transition: transform var(--transition-base);
}

.faq-item.active .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-answer {
  display: none;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-question {
  color: var(--primary-color);
}

/* ============================================
   Forms
   ============================================ */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--text-primary);
}

.form-input {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea.form-input {
  min-height: 120px;
  resize: vertical;
}

/* ============================================
   Utilities
   ============================================ */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .menu-toggle {
    display: block;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--border-color);
  }

  .nav-menu.active {
    display: flex;
  }

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

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

  .hw-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .hero-cta {
    flex-direction: column;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

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

@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  /* Download page: two columns to one column on mobile */
  [style*="grid-template-columns: 1fr 1fr"] {
    grid-template-columns: 1fr !important;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }

  .pricing-price {
    font-size: 2rem;
  }
}

/* ============================================
   Article & Main Content Styles
   ============================================ */
.main {
  min-height: calc(100vh - 200px);
  padding: var(--spacing-2xl) 0;
  background-color: var(--background-light);
}

.article {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-2xl);
  max-width: 900px;
  margin: 0 auto;
}

.article-header {
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--border-color);
}

.article-header h1 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.article-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: var(--spacing-sm);
}

.article-content {
  line-height: 1.8;
  color: var(--text-secondary);
}

.article-content p {
  margin-bottom: var(--spacing-lg);
}

.article-content ul,
.article-content ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-xl);
}

.article-content li {
  margin-bottom: var(--spacing-sm);
  line-height: 1.7;
}

.article-content code {
  background: var(--bg-secondary);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-family-code);
  font-size: 0.9em;
  color: var(--primary-color);
}

.article-content pre {
  background: var(--bg-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
}

.article-content pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
}

/* Guide Section Styles */
.guide-section {
  margin-bottom: var(--spacing-2xl);
}

.guide-section h2 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--border-color);
  font-size: 2rem;
}

.guide-section h3 {
  color: var(--text-primary);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
}

.guide-section h4 {
  color: var(--text-primary);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  font-size: 1.25rem;
}

.code-block {
  background: var(--bg-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  font-family: var(--font-family-code);
  margin: var(--spacing-lg) 0;
  overflow-x: auto;
  border-left: 4px solid var(--primary-color);
  line-height: 1.6;
}

.code-block code {
  background: none;
  padding: 0;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.step-list {
  list-style: decimal;
  padding-left: var(--spacing-xl);
  margin: var(--spacing-lg) 0;
}

.step-list li {
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.feature-box {
  background: var(--bg-secondary);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  margin: var(--spacing-lg) 0;
  border-left: 4px solid var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.feature-box h4 {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

.feature-box p {
  margin-bottom: var(--spacing-md);
}

.feature-box ul,
.feature-box ol {
  margin-top: var(--spacing-md);
}

/* Responsive adjustments for article */
@media (max-width: 768px) {
  .article {
    padding: var(--spacing-lg);
    margin: var(--spacing-md);
  }

  .article-header h1 {
    font-size: 2rem;
  }

  .guide-section h2 {
    font-size: 1.75rem;
  }

  .guide-section h3 {
    font-size: 1.25rem;
  }

  .code-block {
    padding: var(--spacing-md);
    font-size: 0.85rem;
  }
}

/* ============================================
   Help Center Styles
   ============================================ */
.help-search {
  max-width: 600px;
  margin: 0 auto var(--spacing-2xl);
}

.help-search input {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: 1rem;
}

.help-search input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.help-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.help-category {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.help-category:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.help-category h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.help-category ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.help-category li {
  padding: var(--spacing-xs) 0;
}

.help-category a {
  color: var(--text-primary);
  text-decoration: none;
}

.help-category a:hover {
  color: var(--primary-color);
}

.help-faq {
  max-width: 900px;
  margin: 0 auto;
}

.code-block {
  background: var(--background-light);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
  font-family: var(--font-family-code);
  font-size: 0.875rem;
  overflow-x: auto;
}

/* 滑块验证码样式 */
.slider-captcha-container {
  margin: 20px 0;
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 8px;
  background: #f9f9f9;
}

.captcha-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
}

.captcha-header span {
  font-weight: bold;
  color: #333;
}

.btn-refresh {
  padding: 5px 15px;
  background: #007bff;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
}

.btn-refresh:hover {
  background: #0056b3;
}

.captcha-main-image-container {
  position: relative;
  margin-bottom: 15px;
  border: 2px solid #ddd;
  border-radius: 4px;
  overflow: hidden;
  background: #fff;
}

#main-canvas {
  display: block;
  width: 100%;
  height: auto;
}

.slider-track {
  position: relative;
  width: 100%;
  height: 60px;
  background: #f0f0f0;
  border: 2px solid #ddd;
  border-radius: 4px;
  margin-bottom: 10px;
  overflow: hidden;
}

.slider-button {
  position: absolute;
  width: 50px;
  height: 50px;
  background: #007bff;
  border: 2px solid #0056b3;
  border-radius: 4px;
  cursor: move;
  cursor: grab;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
  transition: background 0.2s;
}

.slider-button:hover {
  background: #0056b3;
}

.slider-button:active {
  cursor: grabbing;
}

#slider-canvas {
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.slider-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #666;
  font-size: 14px;
  pointer-events: none;
  z-index: 1;
}

.captcha-status {
  margin-top: 10px;
  font-size: 14px;
  text-align: center;
}

.captcha-status.success {
  color: #28a745;
}

.captcha-status.error {
  color: #dc3545;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .slider-captcha-container {
    padding: 15px;
  }
  
  .slider-track {
    height: 50px;
  }
  
  .slider-button {
    width: 45px;
    height: 45px;
  }
}

/* ============================================
   Common Utility Classes
   ============================================ */
.logo-tagline {
  font-size: 0.75rem;
  line-height: 1.2;
  opacity: 0.8;
}

.breadcrumb-nav {
  padding: var(--spacing-lg) var(--spacing-lg);
}

.help-intro {
  max-width: 800px;
  margin: 0 auto var(--spacing-2xl);
}

.help-cta {
  margin-top: var(--spacing-3xl);
}

.help-cta-text {
  margin-bottom: var(--spacing-lg);
}

.help-cta-btn {
  margin-left: var(--spacing-md);
}

.faq-title {
  margin-bottom: var(--spacing-xl);
}

.contact-intro {
  max-width: 800px;
  margin: 0 auto var(--spacing-2xl);
}

.contact-content {
  max-width: 800px;
  margin: 0 auto;
}

.contact-cards {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  margin-bottom: var(--spacing-2xl);
}

.contact-faq {
  margin-top: var(--spacing-3xl);
}

.faq-card {
  margin-top: var(--spacing-xl);
}

.faq-card:first-of-type {
  margin-top: var(--spacing-xl);
}

.footer-links {
  margin-top: var(--spacing-sm);
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  margin: 0 var(--spacing-sm);
  text-decoration: none;
}

.footer-links a:hover {
  color: rgba(255, 255, 255, 0.8);
}

.footer-separator {
  margin: 0 var(--spacing-sm);
}

.wechat-qrcode {
  margin-top: var(--spacing-md);
}

.qrcode-image {
  width: 120px;
  height: 120px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
}

/* ============================================
   Form Error and Help Styles
   ============================================ */
.form-error {
  display: none;

/* ============================================
   Product Screenshot Carousel
   ============================================ */
.screenshot-carousel {
  position: relative;
  max-width: 900px; margin: 0 auto;
  overflow: hidden; border-radius: 12px;
  background: #f0f2f5;
}
.carousel-track {
  display: flex; transition: transform .5s ease;
}
.carousel-slide {
  min-width: 100%; padding: 2rem;
  text-align: center;
}
.carousel-slide img {
  max-width: 100%; border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}
.carousel-slide .slide-label {
  margin-top: 0.75rem; font-size: 0.95rem;
  color: #555; font-weight: 600;
}
.carousel-dots {
  display: flex; justify-content: center;
  gap: 0.5rem; padding: 1rem 0;
}
.carousel-dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: #cbd5e1; cursor: pointer;
  transition: background .3s;
}
.carousel-dots span.active { background: var(--primary-color); width: 28px; border-radius: 5px; }
.carousel-prev, .carousel-next {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,.85); border: none; border-radius: 50%;
  width: 40px; height: 40px; font-size: 1.25rem; cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,.1); z-index: 10;
  transition: background .2s;
}
.carousel-prev:hover, .carousel-next:hover { background: #fff; }
.carousel-prev { left: 12px; }
.carousel-next { right: 12px; }

@keyframes carouselAuto {
  0%,20% { transform: translateX(0); }
  25%,45% { transform: translateX(-100%); }
  50%,70% { transform: translateX(-200%); }
  75%,95% { transform: translateX(-300%); }
  100% { transform: translateX(-400%); }
}
.carousel-auto .carousel-track { animation: carouselAuto 20s infinite; }
.carousel-auto:hover .carousel-track { animation-play-state: paused; }
  color: red;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.form-help {
  display: block;
  color: #666;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.contact-form {
  margin-top: var(--spacing-lg);
}

/* ============================================
   Mega Menu Dropdown — V3 大气三区(2026-07)
   ============================================ */
.nav-menu .has-mega { position: relative; }
.mega-dropdown {
  display: none;
  position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  background: #fff; border-radius: 20px; box-shadow: 0 35px 80px rgba(0,0,0,0.18);
  padding: 2.5rem 2rem; z-index: 1000; min-width: 1120px;
  gap: 0;
}
.mega-dropdown-products {
  grid-template-columns: 240px 1px 240px 1px 1fr;
}
.has-mega:hover .mega-dropdown { display: grid; }
/* 竖向分割线 */
.mega-divider-v {
  width: 1px; background: linear-gradient(180deg, transparent, #e2e8f0 20%, #e2e8f0 80%, transparent);
  margin: 0.25rem 0; align-self: stretch;
}
/* 分区 */
.mega-section { display: flex; flex-direction: column; gap: 0.35rem; }
.mega-section-title {
  font-size: 0.85rem; font-weight: 800; text-transform: uppercase; letter-spacing: 2.5px;
  color: #2563EB; padding: 0.55rem 1rem 0.65rem; margin-bottom: 0.35rem;
  border-bottom: 2.5px solid #eef2ff; display: flex; align-items: center; gap: 0.5rem;
}
.mega-section-title .st-icon { font-size: 1.15rem; }
.mega-item {
  display: flex; align-items: center; gap: 0.85rem;
  padding: 0.75rem 1rem; border-radius: 10px; text-decoration: none;
  color: #1e2937; font-size: 1rem; font-weight: 500;
  transition: all .18s ease; white-space: nowrap; line-height: 1.45;
}
.mega-item:hover { background: #eef2ff; color: #2563EB; transform: translateX(5px); }
.mega-item .mega-icon { font-size: 1.45rem; width: 1.7rem; text-align: center; flex-shrink: 0; }
.mega-item .mega-badge {
  font-size: 0.7rem; background: #dbeafe; color: #2563EB;
  padding: 0.15rem 0.5rem; border-radius: 4px; font-weight: 700; margin-left: auto;
}
/* RFID区内部2列(12个产品) */
.mega-section-rfid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0.25rem 1rem;
  padding: 0 0.5rem;
}
.mega-section-rfid .mega-item { padding: 0.55rem 0.8rem; font-size: 0.95rem; }
/* 扫码识别列左侧微调 */
.mega-dropdown-products > :nth-child(3) .mega-item { padding-left: 1.25rem; }
/* Mega-item Lucide icons */
.mega-item .lucide { width: 1.35rem; height: 1.35rem; stroke-width: 2.2; }
.mega-section-rfid .lucide { width: 1.15rem; height: 1.15rem; }

/* 解决方案2列 */
.mega-dropdown-solutions {
  grid-template-columns: repeat(2, 1fr); min-width: 600px;
}

/* 解决方案单列模式(平铺) */
.mega-dropdown-solutions {
  grid-template-columns: repeat(2, 1fr); min-width: 520px;
}
.mega-item-special { border-left: 3px solid #7C3AED; background: #faf5ff; }
.mega-item-special:hover { background: #ede9fe; }
/* 解决方案 2 列 */
.mega-dropdown-solutions { min-width: 520px; grid-template-columns: 1fr 1fr; gap: 0.1rem 0.5rem; padding: 1.25rem 1rem; }

/* ============================================
   V2 — 现代化增强样式（2026-06）
   ============================================ */

/* --- Section Header --- */
.section-header { text-align: center; margin-bottom: 3rem; }
.section-header h2 { font-size: 2rem; margin-bottom: .5rem; }
.section-header p { color: var(--text-secondary); font-size: 1.1rem; }
.section-cta { text-align: center; margin-top: 2.5rem; }
.bg-light { background-color: var(--background-light); }

/* --- Grid Layouts --- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--spacing-xl); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-xl); }
.grid-4 { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--spacing-xl); }

/* --- Hero Home --- */
.hero-home {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 40%, #0f3460 70%, #533483 100%);
  position: relative; overflow: hidden; padding: 7rem 0 6rem;
}
.hero-home::before {
  content: ''; position: absolute; top: -30%; right: -20%;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(37,99,235,.25) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-home::after {
  content: ''; position: absolute; bottom: -20%; left: -15%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(249,115,22,.15) 0%, transparent 65%);
  border-radius: 50%;
}
.hero-title { color: #fff; font-size: 3.2rem; font-weight: 800; margin-bottom: 1rem; position: relative; z-index:1; }
.hero-subtitle { color: rgba(255,255,255,.8); font-size: 1.3rem; max-width: 700px; margin: 0 auto 2.5rem; position: relative; z-index:1; line-height: 1.7; }
.hero-stat { color: rgba(255,255,255,.55); margin-top: 2rem; font-size: .95rem; position: relative; z-index:1; }

/* --- Button XL --- */
.btn-xl { padding: 1rem 2.8rem; font-size: 1.15rem; border-radius: var(--radius-lg); }
.btn-outline-light { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,.45); font-weight: 600; }
.btn-outline-light:hover { background: rgba(255,255,255,.12); border-color: #fff; color: #fff; transform: translateY(-2px); }

/* --- Stats Bar --- */
.stats-bar { background: var(--primary-color); padding: 3rem 0; }
.stats-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 2rem; text-align: center; }
.stat-item { color: #fff; }
.stat-number { font-size: 2.8rem; font-weight: 800; display: block; line-height: 1; }
.stat-unit { font-size: 1.4rem; font-weight: 400; }
.stat-label { font-size: 1rem; opacity: .8; margin-top: .35rem; display: block; }

/* --- Card: Advantage --- */
.card-advantage {
  background: #fff; border-radius: var(--radius-lg); padding: 2rem 1.5rem;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border-color);
  transition: all var(--transition-base); text-align: center;
}
.card-advantage:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.adv-icon { font-size: 2.5rem; margin-bottom: 1rem; display: block; }
.card-advantage h3 { font-size: 1.15rem; margin-bottom: .5rem; }
.card-advantage p { font-size: .92rem; color: var(--text-secondary); line-height: 1.6; }

/* --- Card: Product --- */
.card-product {
  display: flex; gap: 1.5rem; align-items: flex-start;
  background: #fff; border-radius: var(--radius-lg); padding: 1.75rem;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border-color);
  transition: all var(--transition-base); text-decoration: none; color: inherit;
}
.card-product:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.prod-icon { font-size: 2.8rem; flex-shrink: 0; line-height: 1; }
.prod-body h3 { font-size: 1.1rem; margin-bottom: .35rem; color: var(--text-primary); }
.prod-body p { font-size: .9rem; color: var(--text-secondary); margin-bottom: .6rem; line-height: 1.55; }
.prod-tags { display: flex; gap: .4rem; flex-wrap: wrap; }
.prod-tags span {
  display: inline-block; padding: .15rem .55rem; border-radius: var(--radius-full);
  background: #eff6ff; color: var(--primary-color); font-size: .78rem; font-weight: 500;
}

/* --- Card: Solution --- */
.card-solution {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  background: #fff; border-radius: var(--radius-lg); padding: 2rem 1rem;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border-color);
  transition: all var(--transition-base); text-decoration: none; color: inherit;
}
.card-solution:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--primary-light); }
.sol-icon { font-size: 2.5rem; margin-bottom: .75rem; }
.card-solution h4 { font-size: 1.05rem; margin-bottom: .3rem; color: var(--text-primary); }
.card-solution p { font-size: .85rem; color: var(--text-secondary); }

/* --- Card: Hardware --- */
.card-hardware {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  background: #fff; border-radius: var(--radius-lg); padding: 2rem 1rem;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border-color);
  transition: all var(--transition-base); text-decoration: none; color: inherit;
}
.card-hardware:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--secondary-color); }
.hw-icon { font-size: 2.8rem; margin-bottom: .75rem; }
.card-hardware h4 { font-size: 1.05rem; margin-bottom: .3rem; color: var(--text-primary); }
.card-hardware p { font-size: .85rem; color: var(--text-secondary); }

/* --- Card: Testimonial --- */
.card-testimonial {
  background: #fff; border-radius: var(--radius-lg); padding: 2rem;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border-color);
  border-left: 4px solid var(--primary-color);
}
.testimonial-text { font-size: 1rem; color: var(--text-primary); line-height: 1.7; margin-bottom: 1rem; font-style: italic; }
.testimonial-author { font-size: .88rem; color: var(--text-secondary); }

/* --- CTA Section --- */
.cta-section {
  background: linear-gradient(135deg, var(--secondary-color) 0%, #ea580c 100%);
  color: #fff; padding: 4rem 0; text-align: center;
}
.cta-section h2 { color: #fff; font-size: 2rem; margin-bottom: .5rem; }
.cta-section p { color: rgba(255,255,255,.85); font-size: 1.15rem; margin-bottom: 2rem; }

/* --- Footer V2 --- */
.footer-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 2.5rem; }
.footer-col h4 { color: #fff; margin-bottom: 1rem; font-size: 1.05rem; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col ul li { margin-bottom: .5rem; }
.footer-col ul li a { color: rgba(255,255,255,.7); text-decoration: none; font-size: .9rem; transition: color .2s; }
.footer-col ul li a:hover { color: #fff; }
.footer-col p { color: rgba(255,255,255,.7); font-size: .9rem; margin-bottom: .35rem; }
.footer-contact { line-height: 1.8; }
.wechat-qr { width: 100px; height: 100px; border-radius: 8px; margin-top: .5rem; }

/* --- Value Lists (product/solution value sections) --- */
.value-list { margin: 1.5rem 0; }
.value-item { display: flex; gap: 1rem; padding: 1.25rem 0; border-bottom: 1px solid #f0f0f0; }
.val-icon { font-size: 1.8rem; flex-shrink: 0; width: 2.5rem; text-align: center; }
.value-item div { color: #555; line-height: 1.7; }

/* --- Logo tagline --- */
.logo-tagline { font-size: .8rem; color: var(--text-secondary); margin-left: .5rem; white-space: nowrap; }
/* --- Lucide Icons (MIT, free for commercial use) --- */
.lucide { width: 1.25em; height: 1.25em; stroke-width: 2; vertical-align: middle; }
.mega-item .lucide { width: 1.05rem; height: 1.05rem; stroke-width: 2.2; }
.mega-section-rfid .lucide { width: 0.95rem; height: 0.95rem; }
.preview-img .lucide { width: 2.5rem; height: 2.5rem; stroke-width: 1.5; color: inherit; }
.card-icon .lucide { width: 1.8rem; height: 1.8rem; stroke-width: 1.8; }
/* --- Product Preview Grid (image placeholders) --- */
.preview-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; margin: 1.5rem 0; }
@media (max-width: 768px) { .preview-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .preview-grid { grid-template-columns: 1fr; } }
@media (max-width: 480px) { .hardware-grid { grid-template-columns: 1fr; } }
@media (max-width: 480px) { .hw-grid-4 { grid-template-columns: 1fr; } }
.preview-card { border-radius: 12px; overflow: hidden; box-shadow: 0 4px 20px rgba(0,0,0,0.08); background: #fff; transition: transform .25s ease, box-shadow .25s ease; }
.preview-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.12); }
.preview-img { width: 100%; aspect-ratio: 16/10; display: flex; align-items: center; justify-content: center; font-size: 3rem; position: relative; overflow: hidden; }
.preview-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.preview-img[data-lightbox] { cursor: zoom-in; }
.preview-label { padding: .6rem .85rem; font-size: .82rem; font-weight: 600; color: #1e2937; text-align: center; border-top: 1px solid #f1f5f9; letter-spacing: .3px; }
.preview-badge { position: absolute; top: .6rem; right: .6rem; background: rgba(0,0,0,.45); color: #fff; font-size: .6rem; padding: .15rem .45rem; border-radius: 4px; font-weight: 600; letter-spacing: .5px; }
/* --- Hardware Menu --- */
.mega-dropdown-hardware { min-width: 280px; padding: 1rem .75rem; grid-template-columns: 1fr; gap: .15rem; }
.mega-dropdown-hardware .mega-item { padding: .5rem .65rem; font-size: .88rem; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .grid-4, .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4, .stats-grid, .footer-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 2.2rem; }
  .hero-subtitle { font-size: 1.05rem; }
  .card-product { flex-direction: column; }
  .hero-home { padding: 4rem 0 3rem; }
  .stat-number { font-size: 2rem; }
}

/* Footer sub-category labels */
.footer-sub {
    font-size: .75rem !important;
    color: rgba(255,255,255,.35) !important;
    text-transform: uppercase;
    letter-spacing: .05em;
    padding-top: .5rem;
    cursor: default;
    pointer-events: none;
}
@media (max-width: 900px) {
  .mega-dropdown { position: static; transform: none; min-width: auto; grid-template-columns: repeat(2,1fr); box-shadow: none; padding: 0.75rem; }
  .has-mega:hover .mega-dropdown { display: none; }
}