/* ==========================================================================
   SHEEYAN LIMITED - Official Website Stylesheet
   Modern, Premium Corporate Aesthetic for Tech Wholesale & Retail
   ========================================================================== */

:root {
  --primary: #0e274a;
  --primary-dark: #091a33;
  --primary-light: #163a6e;
  --accent: #2563eb;
  --accent-light: #3b82f6;
  --accent-gold: #d97706;
  --accent-gold-light: #f59e0b;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --border-color: #e2e8f0;
  --border-light: rgba(226, 232, 240, 0.8);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 25px -5px rgba(14, 39, 74, 0.08), 0 8px 10px -6px rgba(14, 39, 74, 0.04);
  --shadow-hover: 0 20px 25px -5px rgba(14, 39, 74, 0.12), 0 10px 10px -5px rgba(14, 39, 74, 0.05);
  --radius-sm: 0.5rem;
  --radius-md: 0.85rem;
  --radius-lg: 1.25rem;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  color: var(--text-main);
  background-color: var(--bg-page);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  color: var(--primary-light);
  text-decoration: none;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--primary);
  font-weight: 700;
  line-height: 1.3;
}

/* Utility Containers */
.container {
  width: 100%;
  max-width: 1140px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.section {
  padding: 4.5rem 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  text-align: center;
  color: var(--primary);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto 3rem auto;
  font-size: 1.05rem;
}

/* Card Base */
.card-base {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 0.05em;
  line-height: 1.1;
}

.brand-tagline {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.75rem;
}

.nav-link {
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0.25rem;
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.lang-switch-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  border-radius: 2rem;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.lang-switch-btn:hover {
  background: var(--bg-subtle);
  border-color: var(--accent);
  color: var(--accent);
}

.nav-contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: #fff !important;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.nav-contact-btn:hover {
  background: var(--accent);
  transform: translateY(-1px);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--primary);
  cursor: pointer;
}

/* ==========================================================================
   Hero Section / About Module (Two-column card style as in reference)
   ========================================================================== */
.hero-section {
  padding: 3.5rem 0 2rem 0;
}

.about-card {
  overflow: hidden;
}

.about-row {
  display: flex;
  flex-direction: row;
}

.about-img-col {
  flex: 0 0 46%;
  max-width: 46%;
  position: relative;
}

.about-img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
  display: block;
}

.about-img-badge {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  background: rgba(14, 39, 74, 0.85);
  backdrop-filter: blur(8px);
  color: #fff;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.about-content-col {
  flex: 0 0 54%;
  max-width: 54%;
  padding: 3.5rem 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.company-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(37, 99, 235, 0.08);
  padding: 0.35rem 0.8rem;
  border-radius: 2rem;
  width: fit-content;
  margin-bottom: 1.25rem;
}

.about-title {
  font-size: 2.15rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.about-lead {
  font-size: 1.05rem;
  color: var(--text-main);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.about-badges-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
  margin-top: 0.5rem;
}

.badge-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 0.9rem;
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
}

.badge-item i {
  color: var(--accent);
  font-size: 1rem;
}

/* ==========================================================================
   What We Do Section (Product & Service Grid)
   ========================================================================== */
.bg-light-section {
  background: var(--bg-subtle);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.feature-card {
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  height: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  background: #ffffff;
  position: relative;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(37, 99, 235, 0.3);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.45rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 4px 12px rgba(14, 39, 74, 0.15);
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  transform: scale(1.05);
}

.feature-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--primary);
}

.feature-card-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
}

.feature-tag {
  font-size: 0.75rem;
  background: var(--bg-subtle);
  color: var(--text-main);
  padding: 0.25rem 0.6rem;
  border-radius: 0.35rem;
  font-weight: 600;
}

/* ==========================================================================
   Strengths / Advantages Strip
   ========================================================================== */
.strengths-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.strength-item {
  padding: 1.75rem;
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: var(--transition);
}

.strength-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.strength-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  opacity: 0.85;
}

.strength-content h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.strength-content p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
}

/* ==========================================================================
   Vision & Contact Section (Side-by-side cards as in reference)
   ========================================================================== */
.vision-contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.info-card {
  padding: 2.75rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.info-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.info-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.info-card-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  margin: 0;
}

.vision-text {
  font-size: 1.05rem;
  color: var(--text-main);
  line-height: 1.75;
  margin-bottom: 2rem;
}

.vision-values {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
}

.vision-values-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

.values-list {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.value-pill {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
}

.value-pill i {
  color: var(--accent);
  font-size: 0.85rem;
}

/* Contact List */
.contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
  margin-bottom: 2rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1.15rem;
}

.contact-item-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

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

.contact-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.contact-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.45;
}

.contact-value a {
  color: var(--accent);
  font-weight: 700;
}

.contact-value a:hover {
  text-decoration: underline;
}

.address-highlight {
  font-family: inherit;
  color: var(--primary);
  letter-spacing: 0.01em;
}

.contact-btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.85rem 1.5rem;
  background: var(--accent);
  color: #fff !important;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
  margin-top: auto;
}

.contact-btn-action:hover {
  background: var(--primary);
  box-shadow: 0 6px 16px rgba(14, 39, 74, 0.25);
  transform: translateY(-2px);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--primary);
  color: #ffffff;
  padding: 3rem 0 2rem 0;
  font-size: 0.9rem;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  padding-bottom: 2rem;
  margin-bottom: 1.75rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.footer-brand-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 0.03em;
}

.footer-brand-desc {
  font-size: 0.8rem;
  color: var(--text-light);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.88rem;
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-light);
}

.footer-bottom a {
  color: var(--text-light);
}

.footer-bottom a:hover {
  color: #ffffff;
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .strengths-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 820px) {
  .section {
    padding: 3.5rem 0;
  }
  
  .about-row {
    flex-direction: column;
  }
  
  .about-img-col {
    flex: 0 0 100%;
    max-width: 100%;
    min-height: 280px;
  }
  
  .about-content-col {
    flex: 0 0 100%;
    max-width: 100%;
    padding: 2.25rem 1.75rem;
  }
  
  .vision-contact-grid {
    grid-template-columns: 1fr;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
  
  .strengths-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
  
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
  
  .nav-menu {
    display: none;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .nav-menu.show-mobile {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    gap: 1rem;
  }
}