/* ==========================================================================
   OKX Official Affiliate Landing Page Stylesheet
   Theme: Obsidian Pro Web3 Dark Mode with Electric Neon Accent
   Optimized for High Conversion, Mobile Responsiveness & SEO Speed
   ========================================================================== */

:root {
  --bg-primary: #080A0E;
  --bg-surface: #0E131C;
  --bg-surface-elevated: #151D2A;
  --bg-card: rgba(18, 25, 38, 0.7);
  --bg-card-hover: rgba(24, 34, 52, 0.85);

  --accent-neon: #00E575;
  --accent-neon-hover: #00C865;
  --accent-neon-glow: rgba(0, 229, 117, 0.25);
  --accent-neon-soft: rgba(0, 229, 117, 0.1);

  --accent-cyan: #00D8F6;
  --accent-gold: #F7BA1E;

  --text-primary: #F5F7FA;
  --text-secondary: #9AA4B5;
  --text-muted: #64748B;
  --text-inverse: #080A0E;

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 229, 117, 0.3);
  --border-highlight: rgba(255, 255, 255, 0.16);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;

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

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

html {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(0, 229, 117, 0.08) 0%, transparent 60%),
    radial-gradient(circle at 90% 20%, rgba(0, 216, 246, 0.04) 0%, transparent 40%);
  background-repeat: no-repeat;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul {
  list-style: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ==========================================================================
   Top Compliance & Partner Notification Banner
   ========================================================================== */
.top-banner {
  background: linear-gradient(90deg, #09131C 0%, #101E2E 50%, #09131C 100%);
  border-bottom: 1px solid rgba(0, 229, 117, 0.2);
  padding: 9px 0;
  font-size: 13.5px;
}

.top-banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  background: rgba(0, 229, 117, 0.15);
  border: 1px solid rgba(0, 229, 117, 0.3);
  border-radius: var(--radius-full);
  color: var(--accent-neon);
  font-weight: 600;
  font-size: 12px;
  white-space: nowrap;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  background-color: var(--accent-neon);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-neon);
  animation: pulseAnim 2s infinite ease-in-out;
}

@keyframes pulseAnim {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.banner-text {
  color: #C8D3E0;
  flex: 1;
  text-align: center;
}

.banner-text strong {
  color: var(--accent-neon);
  letter-spacing: 0.5px;
}

.banner-link {
  color: var(--accent-neon);
  font-weight: 600;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.banner-link:hover {
  text-decoration: underline;
  color: #fff;
}

/* ==========================================================================
   Header Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 10, 14, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon-wrap {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
}

.logo-icon-wrap.sm {
  width: 32px;
  height: 32px;
}

.brand-svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 2px 8px rgba(0, 229, 117, 0.25));
}

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

.brand-title {
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.3px;
  color: #fff;
  line-height: 1.2;
}

.brand-sub {
  font-size: 11.5px;
  color: var(--text-secondary);
  letter-spacing: 0.2px;
}

.desktop-nav .nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-item {
  color: var(--text-secondary);
  font-size: 14.5px;
  font-weight: 500;
  padding: 6px 4px;
  position: relative;
}

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

.nav-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-neon);
  transition: width var(--transition-fast);
}

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

.header-action {
  display: flex;
  align-items: center;
  gap: 14px;
}

.code-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 13px;
}

.code-label {
  color: var(--text-secondary);
  font-size: 12px;
}

.code-val {
  color: var(--accent-neon);
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.5px;
}

.btn-copy-mini {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 7px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  color: #fff;
  font-size: 11px;
  transition: background var(--transition-fast);
}

.btn-copy-mini:hover {
  background: var(--accent-neon);
  color: #000;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  padding: 6px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
}

.menu-bar {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* Mobile Nav Panel */
.mobile-nav-panel {
  display: none;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 16px 20px;
}

.mobile-nav-panel.open {
  display: block;
}

.mobile-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-nav-item {
  display: block;
  padding: 10px 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.mobile-cta-li {
  margin-top: 10px;
}

/* ==========================================================================
   Buttons & UI Elements
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-smooth);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-neon);
  color: #000000;
  box-shadow: 0 4px 16px var(--accent-neon-glow);
}

.btn-primary:hover {
  background: var(--accent-neon-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 22px rgba(0, 229, 117, 0.35);
  color: #000;
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  border-color: var(--accent-neon);
  color: var(--accent-neon);
  background: var(--accent-neon-soft);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 13.5px;
  border-radius: var(--radius-sm);
}

.btn-md {
  padding: 10px 20px;
  font-size: 15px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16.5px;
  border-radius: var(--radius-md);
}

.btn-block {
  width: 100%;
}

.gradient-text {
  background: linear-gradient(135deg, #FFFFFF 20%, var(--accent-neon) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-neon {
  color: var(--accent-neon);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 60px 0 70px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 12.5px;
  font-weight: 600;
}

.tag-neon {
  background: rgba(0, 229, 117, 0.12);
  color: var(--accent-neon);
  border: 1px solid rgba(0, 229, 117, 0.25);
}

.tag-glass {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  border: 1px solid var(--border-subtle);
}

.tag-shield {
  background: rgba(0, 216, 246, 0.08);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 216, 246, 0.25);
}

.hero-title {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.8px;
  margin-bottom: 18px;
}

.hero-desc {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 28px;
}

.hero-desc strong {
  color: #fff;
}

.code-highlight {
  background: rgba(0, 229, 117, 0.15);
  color: var(--accent-neon);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-weight: 700;
}

/* Hero Invite Box */
.invite-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  margin-bottom: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  position: relative;
  overflow: hidden;
}

.invite-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-neon), transparent);
}

.invite-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.invite-title {
  font-size: 13.5px;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.invite-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--accent-neon);
  font-weight: 600;
}

.status-indicator {
  width: 6px;
  height: 6px;
  background-color: var(--accent-neon);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--accent-neon);
}

.invite-body {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #06080C;
  border: 1px dashed rgba(0, 229, 117, 0.35);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  gap: 16px;
}

.invite-code-display {
  display: flex;
  flex-direction: column;
}

.code-number {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 800;
  color: var(--accent-neon);
  letter-spacing: 3px;
  line-height: 1.1;
  text-shadow: 0 0 16px rgba(0, 229, 117, 0.35);
}

.code-benefit {
  font-size: 12.5px;
  color: var(--text-secondary);
  margin-top: 3px;
}

.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  transition: all var(--transition-fast);
}

.btn-copy:hover {
  background: var(--accent-neon);
  color: #000;
  border-color: var(--accent-neon);
  box-shadow: 0 4px 12px var(--accent-neon-glow);
}

.invite-footer {
  margin-top: 14px;
}

.invite-tip {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.5;
}

.invite-tip strong {
  color: var(--accent-neon);
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 34px;
  flex-wrap: wrap;
}

/* Trust Strip */
.trust-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.trust-item {
  display: flex;
  flex-direction: column;
}

.trust-num {
  font-weight: 800;
  font-size: 18px;
  color: #fff;
  line-height: 1.2;
}

.trust-label {
  font-size: 12px;
  color: var(--text-secondary);
}

.trust-sep {
  width: 1px;
  height: 28px;
  background-color: var(--border-subtle);
}

/* Hero QR Showcase Card */
.qr-showcase-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.qr-card-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.qr-header-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 16px;
  color: #fff;
}

.qr-verify-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  background: rgba(0, 229, 117, 0.12);
  color: var(--accent-neon);
  font-size: 11.5px;
  font-weight: 600;
}

.qr-image-wrapper {
  position: relative;
  width: 260px;
  height: 260px;
  padding: 12px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.qr-code-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-code-center-logo {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.qr-card-instructions {
  text-align: center;
  margin-bottom: 20px;
  width: 100%;
}

.qr-instruction-text {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 10px;
}

.qr-instruction-text strong {
  color: #fff;
}

.qr-target-url {
  background: #06080C;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 12px;
}

.url-label {
  color: var(--text-muted);
}

.url-text {
  color: var(--accent-neon);
  font-family: var(--font-mono);
  font-weight: 500;
}

.qr-actions {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn-download-qr {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.btn-download-qr:hover {
  color: var(--accent-neon);
}

/* ==========================================================================
   Section Universal Headers
   ========================================================================== */
.section {
  padding: 80px 0;
  border-top: 1px solid var(--border-subtle);
}

.section-header {
  margin-bottom: 48px;
}

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

.section-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--accent-neon);
  margin-bottom: 10px;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
  line-height: 1.3;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* ==========================================================================
   Benefits & Comparison Section
   ========================================================================== */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 50px;
}

.benefit-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth);
  position: relative;
}

.benefit-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
}

.benefit-card.featured-benefit {
  border-color: rgba(0, 229, 117, 0.4);
  background: linear-gradient(180deg, rgba(0, 229, 117, 0.06) 0%, var(--bg-surface) 100%);
  box-shadow: 0 10px 30px rgba(0, 229, 117, 0.1);
}

.popular-ribbon {
  position: absolute;
  top: 16px;
  right: 18px;
  background: var(--accent-neon);
  color: #000;
  font-size: 11px;
  font-weight: 800;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
}

.benefit-icon-box {
  width: 56px;
  height: 56px;
  background: rgba(0, 229, 117, 0.1);
  border: 1px solid rgba(0, 229, 117, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.benefit-card-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.35;
}

.benefit-card-desc {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
}

.benefit-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.benefit-list li {
  font-size: 13.5px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.benefit-list li::before {
  content: '✓';
  color: var(--accent-neon);
  font-weight: 800;
}

/* Comparison Table */
.comparison-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 32px;
  overflow: hidden;
}

.table-caption {
  font-size: 20px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 24px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14.5px;
}

.comparison-table th,
.comparison-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.comparison-table th {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 14px;
}

.comparison-table th.highlight-col,
.comparison-table td.highlight-col {
  background: rgba(0, 229, 117, 0.05);
}

.comparison-table th.highlight-col {
  color: var(--accent-neon);
  font-weight: 700;
}

.badge-success {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--accent-neon);
  font-weight: 600;
}

/* ==========================================================================
   Profit & Savings Calculator Section
   ========================================================================== */
.calculator-card {
  max-width: 900px;
  margin: 0 auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-xl);
  padding: 36px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

.calc-field {
  margin-bottom: 28px;
}

.calc-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 14px;
}

.calc-val-badge {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--accent-neon);
  color: var(--accent-neon);
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-full);
}

.range-slider {
  width: 100%;
  height: 8px;
  -webkit-appearance: none;
  background: #1c2637;
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-neon);
  cursor: pointer;
  box-shadow: 0 0 10px var(--accent-neon);
  transition: transform var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.range-marks {
  display: flex;
  justify-content: space-between;
  font-size: 11.5px;
  color: var(--text-muted);
  margin-top: 8px;
}

.calc-opt-group {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 30px;
}

.opt-label {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-secondary);
}

.radio-buttons {
  display: flex;
  gap: 16px;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-primary);
  cursor: pointer;
}

.calculator-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

.result-box {
  background: #07090E;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.result-box.result-highlight {
  border-color: rgba(0, 229, 117, 0.4);
  background: rgba(0, 229, 117, 0.05);
}

.result-title {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.result-amount {
  font-size: 26px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #fff;
  line-height: 1.2;
  margin-bottom: 4px;
}

.result-amount small {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.result-note {
  font-size: 12px;
  color: var(--text-muted);
}

/* ==========================================================================
   Tutorial Steps Section
   ========================================================================== */
.tutorial-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.step-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  display: flex;
  flex-direction: column;
}

.step-card:hover {
  border-color: var(--border-highlight);
}

.step-number {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 900;
  color: var(--accent-neon);
  opacity: 0.8;
  margin-bottom: 12px;
}

.step-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
}

.step-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
  flex: 1;
}

.step-desc code {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 4px;
  border-radius: 4px;
  color: var(--accent-cyan);
}

.step-tip {
  font-size: 12px;
  color: #8C9BB0;
  background: rgba(255, 255, 255, 0.03);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border-left: 2px solid var(--accent-neon);
}

/* ==========================================================================
   Platform Advantages
   ========================================================================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.adv-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.adv-card:hover {
  border-color: var(--border-glow);
}

.adv-icon {
  width: 48px;
  height: 48px;
  background: rgba(0, 229, 117, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.adv-title {
  font-size: 19px;
  font-weight: 700;
}

.adv-desc {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   App Download & Security Guide
   ========================================================================== */
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 36px;
}

.download-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  text-align: center;
  align-items: center;
  position: relative;
}

.download-card.featured-download {
  border-color: rgba(0, 229, 117, 0.4);
  background: linear-gradient(180deg, rgba(0, 229, 117, 0.05) 0%, var(--bg-surface) 100%);
}

.download-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  background: var(--accent-neon);
  color: #000;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.download-icon {
  width: 64px;
  height: 64px;
  background: var(--bg-surface-elevated);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: #fff;
}

.download-title {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 8px;
}

.download-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.download-notes {
  background: rgba(255, 255, 255, 0.03);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  color: var(--text-muted);
  text-align: left;
  line-height: 1.5;
  margin-bottom: 20px;
  width: 100%;
  flex: 1;
}

.download-notes strong {
  color: var(--text-primary);
}

.security-verify-box {
  background: #0B111A;
  border: 1px solid rgba(0, 229, 117, 0.25);
  border-radius: var(--radius-lg);
  padding: 22px 28px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.sec-badge-icon {
  width: 44px;
  height: 44px;
  background: rgba(0, 229, 117, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sec-text {
  flex: 1;
}

.sec-heading {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.sec-para {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.sec-btn-wrap {
  flex-shrink: 0;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: rgba(0, 229, 117, 0.3);
}

.faq-question {
  width: 100%;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.faq-question:hover {
  color: var(--accent-neon);
}

.faq-chevron {
  transition: transform var(--transition-smooth);
  color: var(--text-secondary);
  flex-shrink: 0;
}

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
  color: var(--accent-neon);
}

.faq-answer {
  display: none;
  padding: 0 22px 20px;
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.faq-answer ul {
  margin-top: 10px;
  padding-left: 18px;
  list-style: disc;
}

.faq-answer li {
  margin-bottom: 6px;
}

.link-inline {
  color: var(--accent-neon);
  text-decoration: underline;
}

/* ==========================================================================
   Mobile Sticky Bar
   ========================================================================== */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  background: rgba(14, 19, 28, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-glow);
  padding: 10px 16px;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.6);
}

.sticky-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.sticky-info {
  display: flex;
  flex-direction: column;
}

.sticky-code {
  font-size: 14px;
  color: #fff;
}

.sticky-code strong {
  color: var(--accent-neon);
  font-family: var(--font-mono);
}

.sticky-sub {
  font-size: 11px;
  color: var(--text-secondary);
}

.sticky-buttons {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ==========================================================================
   Site Footer
   ========================================================================== */
.site-footer {
  background: #040609;
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 30px;
  font-size: 14px;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-brand-name {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
}

.footer-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.footer-invite-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 12.5px;
}

.footer-invite-tag strong {
  color: var(--accent-neon);
  font-family: var(--font-mono);
}

.footer-heading {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 13.5px;
}

.footer-links a:hover {
  color: var(--accent-neon);
}

.anti-phish-text {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 14px;
}

.anti-phish-text code {
  color: var(--accent-neon);
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 4px;
  border-radius: 3px;
}

.ssl-cert-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--accent-neon);
  background: rgba(0, 229, 117, 0.08);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
}

.footer-disclaimer {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  margin-bottom: 28px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.7;
}

.disclaimer-heading {
  color: #A0AEC0;
  font-size: 13px;
  margin-bottom: 8px;
  font-weight: 600;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 20px;
  font-size: 12.5px;
  color: var(--text-muted);
}

.footer-sub-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-sub-links .sep {
  opacity: 0.3;
}

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

/* ==========================================================================
   Toast Notification Box
   ========================================================================== */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 1000;
  background: #0F1622;
  border: 1px solid var(--accent-neon);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-media {
    max-width: 440px;
    margin: 0 auto;
    width: 100%;
  }

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

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

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

  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .top-banner {
    display: none;
  }

  .desktop-nav {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .header-action .btn-primary {
    display: none;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-desc {
    font-size: 15px;
  }

  .code-number {
    font-size: 26px;
  }

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

  .trust-sep {
    display: none;
  }

  .calculator-results {
    grid-template-columns: 1fr;
  }

  .tutorial-steps {
    grid-template-columns: 1fr;
  }

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

  .security-verify-box {
    flex-direction: column;
    text-align: center;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .mobile-sticky-bar {
    display: block;
  }

  body {
    padding-bottom: 70px;
  }

  .toast {
    left: 20px;
    right: 20px;
    bottom: 80px;
    text-align: center;
    justify-content: center;
  }
}