/* ==========================================================================
   ABC NETWORK TECHNOLOGY CO., LTD. - OFFICIAL WEBSITE CSS
   Theme: Ethereal Pristine Aesthetics (清新脱俗)
   Fully Responsive (PC / Tablet / Mobile)
   ========================================================================== */

/* 1. Design Tokens & Variables */
:root {
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  
  /* Ethereal Color Palette */
  --bg-main: #f8fafc;
  --bg-gradient: radial-gradient(circle at 10% 20%, rgba(224, 242, 254, 0.7) 0%, rgba(240, 249, 255, 0.5) 45%, rgba(250, 232, 255, 0.4) 90%);
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-glass: rgba(255, 255, 255, 0.85);
  
  --primary: #0284c7;
  --primary-gradient: linear-gradient(135deg, #38bdf8 0%, #0284c7 50%, #2563eb 100%);
  --accent-pink: #f472b6;
  --accent-purple: #c084fc;
  --accent-cyan: #22d3ee;
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #94a3b8;
  
  --border-glass: rgba(255, 255, 255, 0.8);
  --border-subtle: rgba(226, 232, 240, 0.8);
  
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.03), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-glass: 0 10px 30px -5px rgba(14, 165, 233, 0.12), 0 4px 12px 0 rgba(0, 0, 0, 0.03);
  --shadow-glow: 0 0 25px rgba(56, 189, 248, 0.35);

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 2. Global Resets & Typography */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  background: var(--bg-main);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

/* Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Section Title Utility */
.section-tag {
  display: inline-block;
  padding: 6px 16px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: #0284c7;
  background: rgba(224, 242, 254, 0.9);
  border: 1px solid rgba(186, 230, 253, 0.8);
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.25;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0369a1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto 32px auto;
}

/* 3. Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition-smooth);
}

.header.scrolled {
  padding: 12px 0;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-icon-img {
  height: 42px;
  width: 42px;
  object-fit: cover;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.25);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.brand-logo:hover .brand-icon-img {
  transform: scale(1.06) rotate(2deg);
  box-shadow: 0 6px 18px rgba(14, 165, 233, 0.45);
}

.brand-name-group {
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.15;
}

.brand-name-main {
  font-size: 1.35rem;
  font-weight: 900;
  background: linear-gradient(135deg, #00f2fe 0%, #38bdf8 40%, #818cf8 80%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
}

.brand-name-accent {
  background: linear-gradient(135deg, #00f2fe 0%, #38bdf8 40%, #818cf8 80%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-name-sub {
  font-size: 0.72rem;
  font-weight: 700;
  color: #38bdf8;
  letter-spacing: 0.18em;
  margin-top: 1px;
}

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

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  border-radius: 2px;
  transition: width var(--transition-fast);
}

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

.nav-link:hover::after {
  width: 100%;
}

/* Custom Flat Language Dropdown */
.lang-flat-dropdown {
  position: relative;
  user-select: none;
}

.lang-flat-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(241, 245, 249, 0.7);
  border: 1px solid rgba(226, 232, 240, 0.8);
  border-radius: var(--radius-full);
  padding: 6px 14px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  transition: all var(--transition-fast);
  backdrop-filter: blur(8px);
}

.lang-flat-trigger:hover {
  background: rgba(255, 255, 255, 0.95);
  border-color: rgba(186, 230, 253, 0.9);
  color: var(--primary);
}

.lang-flat-dropdown.open .lang-flat-trigger {
  background: #ffffff;
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 2px 10px rgba(2, 132, 199, 0.1);
}

.lang-icon {
  font-size: 0.9rem;
  opacity: 0.85;
}

.lang-arrow {
  font-size: 0.68rem;
  color: var(--text-light);
  transition: transform var(--transition-fast);
  margin-left: 2px;
}

.lang-flat-dropdown.open .lang-arrow {
  transform: rotate(180deg);
}

/* Dropdown Menu Popup */
.lang-flat-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 130px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: 14px;
  padding: 6px;
  list-style: none;
  box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 4px 10px rgba(0, 0, 0, 0.02);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1), transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.2s;
  z-index: 1100;
}

.lang-flat-dropdown.open .lang-flat-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-flat-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 14px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-flat-item:hover {
  background: rgba(240, 249, 255, 0.9);
  color: var(--primary);
}

.lang-flat-item.active {
  background: rgba(224, 242, 254, 0.8);
  color: #0284c7;
  font-weight: 700;
}

.lang-flat-item.disabled {
  opacity: 0.65;
  cursor: not-allowed;
  color: #94a3b8;
}

.lang-flat-item.disabled:hover {
  background: transparent;
  color: #94a3b8;
}

.lang-tag-disabled {
  font-size: 0.68rem;
  padding: 1px 6px;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  color: #64748b;
  font-weight: 500;
}

/* Toast Notice for Disabled Language Selection */
.lang-toast-notice {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(15, 23, 42, 0.92);
  color: #ffffff;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 500;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 9999;
  pointer-events: none;
}

.lang-toast-notice.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Mobile Menu Button */
.mobile-btn {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.mobile-btn span {
  width: 100%;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: var(--transition-fast);
}

.mobile-btn.open span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.mobile-btn.open span:nth-child(2) {
  opacity: 0;
}

.mobile-btn.open span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Overlay Drawer */
.nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(8px);
  z-index: 998;
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.nav-overlay.active {
  opacity: 1;
}

/* 4. Hero Section */
.hero {
  position: relative;
  padding-top: 110px;
  padding-bottom: 40px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

#particleCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: auto;
  z-index: 1;
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.hero-content {
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(56, 189, 248, 0.4);
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.15);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  color: #0369a1;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-title-highlight {
  background: linear-gradient(135deg, #0284c7 0%, #38bdf8 50%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 24px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-smooth);
  border: none;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 8px 24px -4px rgba(2, 132, 199, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px -2px rgba(2, 132, 199, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.85);
  color: var(--text-main);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: #ffffff;
  border-color: rgba(56, 189, 248, 0.6);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 36px;
  padding-top: 24px;
  border-top: 1px solid rgba(203, 213, 225, 0.6);
}

.stat-item h4 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.stat-item p {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Hero Visual Card */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 520px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-glass), var(--shadow-glow);
  border: 4px solid rgba(255, 255, 255, 0.8);
  background: rgba(255, 255, 255, 0.4);
}

.hero-image-wrapper img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-image-wrapper:hover img {
  transform: scale(1.04);
}

.floating-badge {
  position: absolute;
  bottom: 24px;
  left: 24px;
  right: 24px;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  gap: 14px;
}

.badge-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.3rem;
}

.badge-text h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.badge-text p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 5. Business Section */
.business-section {
  padding: 40px 0;
  position: relative;
}

.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 16px;
}

.biz-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-glass);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.biz-card:hover {
  transform: translateY(-8px);
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 20px 40px -10px rgba(14, 165, 233, 0.2);
}

.biz-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(224, 242, 254, 0.9) 0%, rgba(186, 230, 253, 0.6) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--primary);
  margin-bottom: 18px;
}

.biz-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-main);
}

.biz-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
  flex-grow: 1;
}

.biz-features {
  list-style: none;
  border-top: 1px dashed rgba(203, 213, 225, 0.8);
  padding-top: 18px;
}

.biz-features li {
  font-size: 0.88rem;
  font-weight: 600;
  color: #334155;
  margin-bottom: 8px;
}

/* 6. Showcase Section */
.showcase-section {
  padding: 40px 0;
  position: relative;
}

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

.showcase-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-glass);
  transition: var(--transition-smooth);
}

.showcase-card:hover {
  transform: translateY(-6px);
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.showcase-thumb {
  position: relative;
  width: 100%;
  height: 220px;
  overflow: hidden;
}

.showcase-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.showcase-card:hover .showcase-thumb img {
  transform: scale(1.06);
}

.dev-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 6px 14px;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(8px);
  color: #38bdf8;
  font-size: 0.78rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.showcase-body {
  padding: 24px;
}

.showcase-cat {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.showcase-body h3 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
}

.showcase-body p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-pill {
  padding: 4px 12px;
  background: rgba(241, 245, 249, 0.9);
  border: 1px solid rgba(203, 213, 225, 0.8);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 600;
  color: #475569;
}

/* 7. Security Section */
.security-section {
  padding: 40px 0;
  position: relative;
}

.security-box {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(240, 249, 255, 0.85) 100%);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(186, 230, 253, 0.8);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-glass);
}

.sec-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 28px auto;
}

.sec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.sec-item {
  display: flex;
  gap: 20px;
  background: rgba(255, 255, 255, 0.8);
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(226, 232, 240, 0.9);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
}

.sec-item:hover {
  background: #ffffff;
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 10px 25px rgba(2, 132, 199, 0.1);
}

.sec-icon-box {
  width: 52px;
  height: 52px;
  min-width: 52px;
  border-radius: 14px;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.4rem;
}

.sec-info h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-main);
}

.sec-info p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Security Shield Feature Center */
.sec-shield-banner {
  margin-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  background: rgba(15, 23, 42, 0.95);
  border-radius: var(--radius-md);
  padding: 24px 32px;
  color: #ffffff;
  box-shadow: 0 15px 35px rgba(15, 23, 42, 0.3);
}

.sec-shield-text h3 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: #38bdf8;
}

.sec-shield-text p {
  font-size: 0.92rem;
  color: #94a3b8;
  max-width: 600px;
}

.sec-shield-img img {
  width: 100px;
  height: 100px;
  object-fit: contain;
  filter: drop-shadow(0 0 12px rgba(56, 189, 248, 0.6));
}

/* 8. About Section */
.about-section {
  padding: 40px 0;
  position: relative;
}

.about-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  box-shadow: var(--shadow-glass);
  max-width: 960px;
  margin: 0 auto;
}

.about-card p {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-card p:last-child {
  margin-bottom: 0;
}

/* 9. Contact & Location Section */
.contact-section {
  padding: 40px 0;
  position: relative;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 28px;
  max-width: 1040px;
  margin: 0 auto;
}

.contact-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-glass);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.contact-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 15px 30px rgba(14, 165, 233, 0.12);
}

.contact-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(224, 242, 254, 0.9) 0%, rgba(186, 230, 253, 0.6) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.contact-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}

.hq-address {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.6;
  margin-bottom: 16px;
}

.hq-meta {
  border-top: 1px dashed rgba(203, 213, 225, 0.8);
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.hq-meta p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.channels-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.channels-list li {
  font-size: 0.88rem;
  font-weight: 600;
  color: #334155;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: rgba(248, 250, 252, 0.8);
  border: 1px solid rgba(226, 232, 240, 0.7);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.channels-list li:hover {
  background: #ffffff;
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateX(4px);
}

.ch-icon {
  font-size: 1.1rem;
}

/* 9. Contact Modal */
.modal-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  overflow-y: auto;
  transition: opacity var(--transition-smooth);
}

.modal-wrapper.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: #ffffff;
  border-radius: var(--radius-lg);
  max-width: 680px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 36px 40px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  position: relative;
  transform: translateY(20px);
  transition: transform var(--transition-smooth);
}

.modal-wrapper.active .modal-content {
  transform: translateY(0);
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(241, 245, 249, 0.8);
  border: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: #64748b;
  transition: var(--transition-fast);
}

.modal-close-btn:hover {
  background: #e2e8f0;
  color: #0f172a;
}

.modal-content h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: #0f172a;
}

.modal-content p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 20px;
}

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

.modal-card-box {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-md);
  padding: 18px;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.modal-card-icon {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.modal-card-box h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 8px;
}

.modal-item-txt {
  font-size: 0.88rem;
  font-weight: 600;
  color: #334155;
  line-height: 1.5;
  margin-bottom: 4px;
}

.modal-sub-txt {
  font-size: 0.8rem;
  color: #64748b;
  margin-bottom: 12px;
}

.modal-divider {
  height: 1px;
  background: #e2e8f0;
  margin: 10px 0;
}

.modal-channels-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.modal-ch-item {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #1e293b;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition-fast);
}

.modal-ch-item:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
  transform: translateX(3px);
}

@media (max-width: 768px) {
  .modal-content {
    padding: 28px 20px;
  }
  .modal-grid {
    grid-template-columns: 1fr;
  }
}

/* 10. Footer */
.footer {
  background: rgba(15, 23, 42, 0.96);
  color: #94a3b8;
  padding: 44px 0 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 28px;
}

.footer-brand img {
  height: 46px;
  margin-bottom: 18px;
  background: #ffffff;
  padding: 6px 14px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3), 0 0 20px rgba(56, 189, 248, 0.25);
  filter: none;
}

.footer-brand p {
  font-size: 0.9rem;
  max-width: 380px;
  line-height: 1.6;
}

.footer-contact-detail {
  margin-top: 6px;
  font-size: 0.82rem !important;
  color: #cbd5e1 !important;
}

.footer-heading {
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.88rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #38bdf8;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
  font-size: 0.82rem;
}

.icp-badges {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: #cbd5e1;
}

.icp-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.05);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: opacity var(--transition-fast);
}

.icp-item.icp-link {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.icp-item.icp-link:hover {
  color: #38bdf8;
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-1px);
  text-decoration: underline;
}

.cn-only-badge.hidden {
  display: none !important;
}

/* 11. Reveal Animations */
.reveal, .reveal-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.revealed, .reveal-up.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* 12. Responsive Design (Media Queries) */

/* Tablet & Mobile (Max width: 1023px) */
@media (max-width: 1023px) {
  .hero {
    padding-top: 90px;
    padding-bottom: 36px;
  }

  .business-section, 
  .showcase-section, 
  .security-section, 
  .about-section,
  .contact-section {
    padding: 32px 0;
  }

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

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-content {
    margin: 0 auto;
  }

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

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

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

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

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

  .sec-shield-banner {
    flex-direction: column;
    text-align: center;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

/* Mobile Devices (Max width: 767px) */
@media (max-width: 767px) {
  .hero {
    padding-top: 80px;
    padding-bottom: 24px;
  }

  .business-section, 
  .showcase-section, 
  .security-section, 
  .about-section,
  .contact-section {
    padding: 24px 0;
  }

  .section-subtitle {
    margin-bottom: 20px;
  }

  .sec-header {
    margin-bottom: 24px;
  }

  .showcase-grid {
    gap: 20px;
  }

  .biz-grid {
    gap: 20px;
  }

  .sec-grid {
    gap: 16px;
  }

  .sec-shield-banner {
    margin-top: 24px;
    padding: 24px 18px;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 30px 40px 30px;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
    transition: right var(--transition-smooth);
    z-index: 999;
  }

  .nav-links.active {
    right: 0;
  }

  .nav-overlay {
    display: block;
  }

  .mobile-btn {
    display: flex;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

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

  .section-title {
    font-size: 1.75rem;
  }

  .security-box {
    padding: 32px 20px;
  }

  .about-card {
    padding: 28px 20px;
  }
}