/* ============================================================
   TRX Energy - Stylesheet
   Inspired by hashrace.dev dark crypto aesthetic
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --bg-primary:    #181A20;
  --bg-secondary:  #1E2028;
  --bg-card:       #242731;
  --border:        #2B3139;
  --accent:        #FCD535;
  --accent-dark:   #d4a800;
  --accent-glow:   rgba(252, 213, 53, 0.15);
  --text-primary:  #EAECEF;
  --text-secondary:#848E9C;
  --text-muted:    #5A6270;
  --success:       #2ECC71;
  --danger:        #E74C3C;
  --font-sans:     "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius:        12px;
  --radius-sm:     8px;
  --transition:    0.2s ease;
  --shadow:        0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-accent: 0 4px 20px rgba(252, 213, 53, 0.25);
}

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

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

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

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

a:hover { opacity: 0.85; }

ul, ol { list-style: none; }

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

/* ---------- Utility ---------- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  text-align: center;
  margin-bottom: 12px;
}

.section-subtitle {
  color: var(--text-secondary);
  text-align: center;
  font-size: 1rem;
  margin-bottom: 48px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #0a0a0a;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  opacity: 1;
  transform: translateY(-1px);
  box-shadow: var(--shadow-accent);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  opacity: 1;
}

.btn-block { width: 100%; }

.btn-lg {
  padding: 16px 40px;
  font-size: 1.05rem;
}

.btn-nav {
  background: var(--accent);
  color: #0a0a0a;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.9rem;
  transition: all var(--transition);
}
.btn-nav:hover {
  background: var(--accent-dark);
  opacity: 1;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 72px;
  background: rgba(24, 26, 32, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.5px;
}
.logo:hover { opacity: 0.9; }
.logo-icon { font-size: 1.4rem; }
.logo-text em {
  color: var(--accent);
  font-style: normal;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.main-nav a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.main-nav a:hover { color: var(--text-primary); opacity: 1; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 80px 0;
}

#matrix-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.12;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  background: var(--accent-glow);
  border: 1px solid rgba(252, 213, 53, 0.3);
  color: var(--accent);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  font-weight: 900;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.7;
}
.hero-subtitle strong { color: var(--accent); }

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: -1px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* ---------- Why Section ---------- */
.why-section {
  padding: 88px 0;
  background: var(--bg-secondary);
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: center;
  max-width: 800px;
  margin: 0 auto;
}

.compare-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
}

.compare-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 12px 0 16px;
}

.compare-card ul { display: flex; flex-direction: column; gap: 10px; }
.compare-card li {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding-left: 4px;
}

.compare-bad { border-color: rgba(231, 76, 60, 0.3); }
.compare-bad .compare-icon { font-size: 2.5rem; }
.compare-bad li { color: var(--text-muted); }

.compare-good {
  border-color: rgba(252, 213, 53, 0.4);
  box-shadow: 0 0 30px var(--accent-glow);
}
.compare-good .compare-icon { font-size: 2.5rem; }
.compare-good strong { color: var(--accent); }

.compare-arrow {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--text-muted);
  text-align: center;
}

/* ---------- Pricing ---------- */
.pricing-section {
  padding: 88px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto 32px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  position: relative;
  transition: border-color var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.pricing-card .btn-block {
  margin-top: auto;
}
.pricing-card:hover {
  border-color: rgba(252, 213, 53, 0.3);
}

.pricing-card-featured {
  border-color: var(--accent);
  box-shadow: 0 0 40px var(--accent-glow);
}

.pricing-card-custom {
  border-color: rgba(130, 200, 255, 0.3);
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(130,200,255,0.04) 100%);
}
.pricing-card-custom .price-amount { color: #82c8ff; }
.pricing-card-custom .energy-value { color: var(--text-primary); }

.custom-example {
  font-size: 0.82rem;
  color: var(--text-muted);
  background: rgba(130,200,255,0.07);
  border: 1px dashed rgba(130,200,255,0.25);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 20px;
  line-height: 1.5;
}
.custom-example strong { color: #82c8ff; }

.pricing-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--accent);
  color: #0a0a0a;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: 50px;
  letter-spacing: 0.5px;
}

.pricing-tag {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 8px;
}

.price-amount {
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: -2px;
  line-height: 1;
}

.price-unit {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.pricing-energy {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.energy-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
}

.energy-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}

.pricing-features li {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ---------- Payment Address ---------- */
.pay-address-box {
  max-width: 600px;
  margin: 48px auto 0;
  background: var(--bg-card);
  border: 1px solid rgba(252, 213, 53, 0.4);
  border-radius: var(--radius);
  padding: 24px 28px;
  text-align: center;
  box-shadow: 0 0 32px var(--accent-glow);
}

.pay-address-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.pay-address-hint {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--text-muted);
}

.pay-address-copy {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(252, 213, 53, 0.08);
  border: 1px dashed rgba(252, 213, 53, 0.5);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  cursor: pointer;
  transition: all var(--transition);
  margin-bottom: 14px;
  width: 100%;
  justify-content: center;
}
.pay-address-copy:hover {
  background: rgba(252, 213, 53, 0.15);
  border-color: var(--accent);
}
.pay-address-copy:active { transform: scale(0.99); }

.pay-address-value {
  font-family: "Courier New", Courier, monospace;
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.5px;
  word-break: break-all;
}

.copy-icon {
  color: var(--text-muted);
  flex-shrink: 0;
  transition: color var(--transition);
}
.pay-address-copy:hover .copy-icon { color: var(--accent); }

.copy-feedback {
  font-size: 0.78rem;
  color: var(--success);
  font-weight: 600;
  min-width: 40px;
}

.pay-address-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
}
.pay-address-desc strong { color: var(--accent); }

/* ---------- Pricing Note ---------- */
.pricing-note {
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 24px;
}
.pricing-note strong { color: var(--accent); }

/* ---------- How It Works ---------- */
.how-section {
  padding: 88px 0;
  background: var(--bg-secondary);
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 680px;
  margin: 0 auto;
  position: relative;
}

.steps-list::before {
  content: "";
  position: absolute;
  left: 28px;
  top: 48px;
  bottom: 48px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.step {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  padding: 32px 0;
}

.step-number {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 900;
  color: var(--accent);
  position: relative;
  z-index: 1;
  box-shadow: 0 0 16px var(--accent-glow);
}

.step-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  padding-top: 12px;
}

.step-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}
.step-content strong { color: var(--accent); }

/* ---------- FAQ ---------- */
.faq-section {
  padding: 88px 0;
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item:hover { border-color: rgba(252, 213, 53, 0.3); }
.faq-item.open { border-color: rgba(252, 213, 53, 0.4); }

.faq-question button {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 0.975rem;
  font-weight: 600;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: color var(--transition);
}
.faq-question button:hover { color: var(--accent); }
.faq-question button::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item.open .faq-question button::after {
  transform: rotate(45deg);
  color: var(--accent);
}

.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}
.faq-answer[hidden] { display: none; }

/* ---------- CTA Section ---------- */
.cta-section {
  padding: 88px 0;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(252,213,53,0.05) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.cta-inner h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 900;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

.cta-inner p {
  color: var(--text-secondary);
  margin-bottom: 36px;
  font-size: 1rem;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-secondary);
  padding: 56px 0 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-brand .logo { margin-bottom: 12px; }
.footer-brand p {
  color: var(--text-muted);
  font-size: 0.875rem;
  max-width: 280px;
  line-height: 1.6;
}

.footer-nav h3,
.footer-contact h3,
.footer-legal h3 {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.footer-nav ul,
.footer-contact ul,
.footer-legal ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a,
.footer-contact a,
.footer-legal a {
  color: var(--text-muted);
  font-size: 0.875rem;
  transition: color var(--transition);
}
.footer-nav a:hover,
.footer-contact a:hover,
.footer-legal a:hover {
  color: var(--accent);
  opacity: 1;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
}

.footer-bottom p {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---------- Telegram Float ---------- */
.telegram-float {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 200;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--accent);
  color: #0a0a0a;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(252, 213, 53, 0.4);
  transition: transform var(--transition), box-shadow var(--transition);
}
.telegram-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px rgba(252, 213, 53, 0.6);
  opacity: 1;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px;
    gap: 16px;
  }
  .main-nav.open { display: flex; }

  .nav-toggle { display: flex; }

  .compare-grid {
    grid-template-columns: 1fr;
  }
  .compare-arrow { text-align: center; }

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

  .hero h1 { letter-spacing: -0.5px; }

  .steps-list::before { display: none; }
  .step { gap: 16px; }
}

@media (max-width: 768px) {
  .pricing-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-stats { gap: 20px; }
  .stat-divider { display: none; }
}

/* ============================================================
   SEO 扩展样式：信任模块 / 计算器 / 语言切换
   ============================================================ */

/* ---------- Screen-reader only ---------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Trust Section ---------- */
.trust-section {
  padding: 40px 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
}

.trust-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0;
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 40px;
  border-right: 1px solid var(--border);
  min-width: 160px;
}
.trust-item:last-child { border-right: none; }

.trust-value {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: -1px;
  line-height: 1;
  margin-bottom: 6px;
}

.trust-badge {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0;
  background: rgba(46,204,113,0.12);
  color: var(--success);
  border: 1px solid rgba(46,204,113,0.3);
  border-radius: 50px;
  padding: 4px 14px;
}

.trust-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
}

/* ---------- Calculator Section ---------- */
.calc-section {
  padding: 88px 0;
  background: var(--bg-secondary);
}

.calc-card {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 36px;
}

.calc-input-group {
  margin-bottom: 36px;
}

.calc-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.calc-slider-wrap {
  display: flex;
  align-items: center;
  gap: 20px;
}

.calc-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}
.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 8px var(--accent-glow);
  transition: transform var(--transition);
}
.calc-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }
.calc-slider::-moz-range-thumb {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
}

.calc-number {
  width: 90px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 700;
  padding: 10px 12px;
  text-align: center;
  outline: none;
  transition: border-color var(--transition);
}
.calc-number:focus { border-color: var(--accent); }

.calc-results {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 16px;
  align-items: center;
  margin-bottom: 20px;
}

.calc-result-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 16px;
  text-align: center;
  transition: border-color var(--transition);
}

.calc-result-before { border-color: rgba(231,76,60,0.3); }
.calc-result-after  { border-color: rgba(252,213,53,0.3); }
.calc-result-save   {
  border-color: rgba(46,204,113,0.4);
  background: rgba(46,204,113,0.05);
}

.calc-result-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.calc-result-value {
  display: block;
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}
.calc-result-before .calc-result-value { color: #e74c3c; }
.calc-result-save   .calc-result-value { color: var(--success); }

.calc-result-sub {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.calc-result-save .calc-result-sub {
  color: var(--success);
  font-weight: 600;
}

.calc-result-arrow {
  font-size: 1.2rem;
  color: var(--text-muted);
  text-align: center;
}

.calc-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

/* ---------- Language Switcher ---------- */
.lang-switcher {
  position: relative;
}

/* 桥接触发器与下拉之间的空隙（原 8px gap 不在父级盒子的 hover 区域内，移入即关菜单） */
.lang-switcher::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 12px;
  z-index: 49;
  pointer-events: none;
}
.lang-switcher:hover::before {
  pointer-events: auto;
}

.lang-current {
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: all var(--transition);
  user-select: none;
  white-space: nowrap;
}
.lang-switcher:hover .lang-current {
  border-color: var(--accent);
  color: var(--text-primary);
}

.lang-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  min-width: 140px;
  box-shadow: var(--shadow);
  z-index: 50;
}
.lang-switcher:hover .lang-dropdown { display: block; }

.lang-dropdown a {
  display: block;
  padding: 10px 16px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
}
.lang-dropdown a:hover {
  background: var(--bg-secondary);
  color: var(--accent);
  opacity: 1;
}

/* ---------- Footer langs ---------- */
.footer-langs {
  display: flex;
  gap: 12px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.footer-langs a {
  font-size: 0.8rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 10px;
  transition: all var(--transition);
}
.footer-langs a:hover {
  color: var(--accent);
  border-color: var(--accent);
  opacity: 1;
}

/* ---------- Responsive: Calculator ---------- */
@media (max-width: 768px) {
  .calc-results {
    grid-template-columns: 1fr;
  }
  .calc-result-arrow { transform: rotate(90deg); }
  .trust-item {
    padding: 16px 24px;
    border-right: none;
    border-bottom: 1px solid var(--border);
    width: 50%;
  }
  .trust-item:last-child,
  .trust-item:nth-last-child(2):nth-child(odd) { border-bottom: none; }
}

@media (max-width: 480px) {
  .trust-item { width: 100%; }
  .calc-card { padding: 24px 16px; }
  .calc-slider-wrap { flex-direction: column; align-items: stretch; }
  .calc-number { width: 100%; }
  .lang-switcher { display: none; }
}