/* CSS Variables for Theme Colors */
:root {
  --bg-primary: #0b0e11;
  --bg-secondary: #1e2329;
  --bg-tertiary: #2b3139;
  --text-primary: #f0f0f0;
  --text-secondary: #b7bdc6;
  --text-muted: #848e9c;
  --accent-primary: #f0b90b;
  --accent-secondary: #fcd535;
  --border-color: #2b3139;
  --error-color: #f6465d;
  --success-color: #02c076;
  --card-bg: #1e2329;
  --header-bg: rgba(11, 14, 17, 0.95);
}

[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #fafafa;
  --bg-tertiary: #f5f5f5;
  --text-primary: #1e2329;
  --text-secondary: #474d57;
  --text-muted: #848e9c;
  --accent-primary: #f0b90b;
  --accent-secondary: #fcd535;
  --border-color: #eaecef;
  --error-color: #f6465d;
  --success-color: #02c076;
  --card-bg: #ffffff;
  --header-bg: rgba(255, 255, 255, 0.95);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: all 0.3s ease;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 24px;
  font-weight: bold;
  color: var(--accent-primary);
}

.nav-logo i {
  font-size: 28px;
}

.nav-menu {
  display: flex;
  gap: 32px;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 6px;
  transition: all 0.3s ease;
}

.nav-link:hover {
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.theme-switcher {
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: all 0.3s ease;
  color: var(--text-secondary);
}

.theme-switcher:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.language-selector {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px 12px;
  border-radius: 6px;
  transition: all 0.3s ease;
}

.lang-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  min-width: 180px;
  max-height: 300px;
  overflow-y: auto;
  z-index: 1001;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
}

.language-selector:hover .lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.lang-option:hover {
  background-color: var(--bg-tertiary);
}

.login-btn, .register-btn {
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: none;
  color: var(--text-primary);
  cursor: pointer;
  font-weight: 500;
  transition: all 0.3s ease;
}

.register-btn {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #000;
}

.login-btn:hover {
  background-color: var(--bg-tertiary);
}

.register-btn:hover {
  background: var(--accent-secondary);
}

.mobile-menu-toggle {
  display: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  color: var(--text-secondary);
}

.mobile-menu-toggle:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

/* Main Content */
.main-content {
  margin-top: 70px;
}

.hero-section {
  padding: 60px 0 80px;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-left {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.user-count {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.count-number {
  font-size: 64px;
  font-weight: bold;
  color: var(--accent-primary);
  letter-spacing: -2px;
}

.hero-title {
  font-size: 48px;
  font-weight: bold;
  line-height: 1.2;
  color: var(--text-primary);
}

.register-form {
  display: flex;
  gap: 12px;
  background: var(--card-bg);
  padding: 8px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.email-input {
  flex: 1;
  padding: 12px 16px;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 16px;
  outline: none;
}

.email-input::placeholder {
  color: var(--text-muted);
}

.register-submit {
  padding: 12px 24px;
  background: var(--accent-primary);
  color: #000;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.register-submit:hover {
  background: var(--accent-secondary);
}

.download-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  color: var(--text-secondary);
}

.app-links {
  display: flex;
  gap: 12px;
}

.app-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.3s ease;
}

.app-link:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* 价格行情 */
.hero-right {
  display: flex;
  justify-content: center;
}

.price-ticker {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  width: 100%;
  max-width: 400px;
}

.price-ticker h3 {
  margin-bottom: 20px;
  color: var(--text-primary);
  font-size: 18px;
}

.coin-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.coin-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
}

.coin-item:last-child {
  border-bottom: none;
}

.coin-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.coin-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 16px;
}

.coin-icon.btc {
  background: #f7931a;
  color: white;
}

.coin-icon.eth {
  background: #627eea;
  color: white;
}

.coin-icon.bnb {
  background: #f3ba2f;
  color: white;
}

.coin-details {
  display: flex;
  flex-direction: column;
}

.coin-name {
  font-weight: 600;
  color: var(--text-primary);
}

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

.coin-price {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.price {
  font-weight: 600;
  color: var(--text-primary);
}

.change {
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 4px;
}

.change.negative {
  color: var(--error-color);
  background: rgba(246, 70, 93, 0.1);
}

.change.positive {
  color: var(--success-color);
  background: rgba(2, 192, 118, 0.1);
}

/* Mobile Download Section */
.mobile-download {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  position: relative;
  overflow: hidden;
}

.mobile-download::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(240,185,11,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.5;
  z-index: 0;
}

.download-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.download-left {
  display: flex;
  flex-direction: column;
}

.download-title {
  font-size: 48px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.2;
}

.download-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 48px;
  line-height: 1.6;
}

.download-options {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-bottom: 48px;
}

.qr-download {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 24px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  transition: all 0.3s ease;
}

.qr-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

.qr-code {
  position: relative;
  width: 80px;
  height: 80px;
  background: var(--bg-primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.qr-image {
  font-size: 32px;
  color: var(--accent-primary);
  z-index: 2;
  position: relative;
}

.qr-border {
  position: absolute;
  top: 8px;
  left: 8px;
  right: 8px;
  bottom: 8px;
  border: 2px solid var(--accent-primary);
  border-radius: 6px;
}

.qr-text h4 {
  font-size: 18px;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.qr-text p {
  color: var(--text-secondary);
  font-size: 14px;
}

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

.app-store-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.3s ease;
  min-width: 160px;
}

.app-store-btn:hover {
  background: var(--bg-tertiary);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.app-store-btn i {
  font-size: 28px;
}

.apple-btn i {
  color: var(--text-primary);
}

.google-btn i {
  color: #34a853;
}

.btn-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.download-on {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.store-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.desktop-downloads {
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

.desktop-title {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-weight: 500;
}

.platform-downloads {
  display: flex;
  gap: 12px;
}

.platform-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  transition: all 0.3s ease;
}

.platform-btn:hover {
  background: var(--card-bg);
  color: var(--text-primary);
}

.platform-btn i {
  font-size: 16px;
}

/* Phone Showcase */
.download-right {
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-showcase {
  position: relative;
}

.phone-mockup {
  position: relative;
  width: 280px;
  height: 560px;
}

.phone-frame {
  width: 100%;
  height: 100%;
  background: linear-gradient(145deg, #1a1a1a, #2d2d2d);
  border-radius: 36px;
  padding: 8px;
  box-shadow: 
    0 0 0 2px rgba(255, 255, 255, 0.1),
    0 20px 40px rgba(0, 0, 0, 0.3),
    inset 0 1px 2px rgba(255, 255, 255, 0.1);
  position: relative;
  z-index: 2;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: #000;
  border-radius: 28px;
  overflow: hidden;
  position: relative;
}

.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px 8px;
  background: #000;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
}

.indicators {
  display: flex;
  gap: 4px;
  font-size: 12px;
}

.app-content {
  padding: 16px 20px;
  background: linear-gradient(180deg, #1a1a1a 0%, #0f0f0f 100%);
  height: calc(100% - 44px);
}

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

.portfolio-value {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.portfolio-value .value {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
}

.portfolio-value .change {
  font-size: 14px;
  font-weight: 500;
}

.portfolio-value .change.positive {
  color: #02c076;
}

.portfolio-value .change.negative {
  color: #f6465d;
}

.app-coins {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.coin-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
}

.coin-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.coin-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 16px;
}

.btc-icon {
  background: #f7931a;
  color: white;
}

.eth-icon {
  background: #627eea;
  color: white;
}

.bnb-icon {
  background: #f3ba2f;
  color: white;
}

.coin-detail {
  display: flex;
  flex-direction: column;
}

.coin-symbol {
  color: #fff;
  font-weight: 600;
  font-size: 14px;
}

.coin-name {
  color: #888;
  font-size: 12px;
}

.coin-price {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.coin-price .price {
  color: #fff;
  font-weight: 600;
  font-size: 14px;
}

.coin-price .change {
  font-size: 12px;
  font-weight: 500;
}

.coin-price .change.positive {
  color: #02c076;
}

.coin-price .change.negative {
  color: #f6465d;
}

.app-chart {
  height: 60px;
  background: linear-gradient(90deg, var(--accent-primary), #fcd535);
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}

.chart-line {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8), transparent);
  animation: chartPulse 3s ease-in-out infinite;
}

@keyframes chartPulse {
  0%, 100% { transform: translateX(-100%); }
  50% { transform: translateX(100%); }
}

.phone-shadow {
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 40px;
  background: radial-gradient(ellipse, rgba(0, 0, 0, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 1;
}

/* FAQ Section */
.faq-section {
  padding: 80px 0;
  background: var(--bg-secondary);
}

.faq-section h2 {
  text-align: center;
  font-size: 36px;
  margin-bottom: 48px;
  color: var(--text-primary);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
}

.faq-question {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: all 0.3s ease;
  color: var(--text-primary);
  font-weight: 500;
}

.faq-question:hover {
  background: var(--bg-tertiary);
}

.faq-question i {
  transition: transform 0.3s ease;
  color: var(--text-muted);
}

.faq-item.active .faq-question i {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
  color: var(--text-secondary);
}

.faq-item.active .faq-answer {
  padding: 0 24px 20px;
  max-height: 200px;
}

.final-cta {
  text-align: center;
  margin-top: 60px;
}

.final-cta h3 {
  font-size: 28px;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.cta-button {
  padding: 16px 32px;
  background: var(--accent-primary);
  color: #000;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.cta-button:hover {
  background: var(--accent-secondary);
  transform: translateY(-2px);
}

/* Mobile Navigation */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1998;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.mobile-nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background: var(--card-bg);
  border-left: 1px solid var(--border-color);
  z-index: 1999;
  transition: right 0.3s ease;
  overflow-y: auto;
}

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

.mobile-nav-header {
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: bold;
  color: var(--accent-primary);
}

.mobile-nav-close {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all 0.3s ease;
}

.mobile-nav-close:hover {
  background: var(--accent-primary);
  color: #000;
}

.mobile-nav-links {
  padding: 20px 0;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  transition: all 0.3s ease;
  border-bottom: 1px solid var(--border-color);
}

.mobile-nav-link:hover {
  background: var(--bg-tertiary);
  color: var(--accent-primary);
}

.mobile-nav-link i {
  margin-right: 12px;
  width: 20px;
  text-align: center;
}

.mobile-nav-actions {
  padding: 20px;
  border-top: 1px solid var(--border-color);
}

.mobile-auth-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.mobile-login-btn, .mobile-register-btn {
  padding: 14px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  transition: all 0.3s ease;
}

.mobile-login-btn {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.mobile-register-btn {
  background: var(--accent-primary);
  color: #000;
  border: 1px solid var(--accent-primary);
}

.mobile-login-btn:hover {
  background: var(--card-bg);
}

.mobile-register-btn:hover {
  background: var(--accent-secondary);
}

.mobile-theme-lang {
  display: flex;
  gap: 12px;
}

.mobile-theme-btn, .mobile-lang-btn {
  flex: 1;
  padding: 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.mobile-theme-btn:hover, .mobile-lang-btn:hover {
  background: var(--card-bg);
  color: var(--text-primary);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .nav-actions {
    gap: 8px;
  }
  
  .nav-actions .theme-switcher,
  .nav-actions .language-selector {
    display: none;
  }
  
  .login-btn, .register-btn {
    padding: 8px 12px;
    font-size: 14px;
    border-radius: 8px;
  }
  
  .mobile-menu-toggle {
    display: block;
    padding: 10px;
    border-radius: 8px;
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
    padding: 0 16px;
  }
  
  .hero-section {
    padding: 80px 0 60px;
  }
  
  .count-number {
    font-size: 42px;
    line-height: 1.1;
  }
  
  .hero-title {
    font-size: 32px;
    line-height: 1.2;
    margin-bottom: 24px;
  }
  
  .register-form {
    flex-direction: column;
    gap: 12px;
    max-width: 400px;
    margin: 0 auto;
  }
  
  .email-input {
    padding: 16px 20px;
    font-size: 16px;
    border-radius: 12px;
  }
  
  .register-submit {
    padding: 16px 20px;
    font-size: 16px;
    border-radius: 12px;
    font-weight: 600;
  }
  
  .download-links {
    margin-top: 32px;
  }
  
  .app-links {
    justify-content: center;
    gap: 16px;
  }
  
  .app-link {
    width: 48px;
    height: 48px;
    font-size: 20px;
  }
  
  .price-ticker {
    max-width: none;
    margin: 0 16px;
    padding: 20px;
  }
  
  .coin-item {
    padding: 16px 0;
  }
  
  .coin-icon {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
  
  .coin-name {
    font-size: 16px;
    font-weight: 600;
  }
  
  .coin-fullname {
    font-size: 13px;
  }
  
  .price {
    font-size: 16px;
    font-weight: 600;
  }
  
  .change {
    font-size: 13px;
    padding: 4px 8px;
    border-radius: 6px;
  }
  
  /* Mobile Download Responsive */
  .mobile-download {
    padding: 60px 0;
  }
  
  .download-hero {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  
  .download-title {
    font-size: 32px;
    line-height: 1.2;
    margin-bottom: 16px;
  }
  
  .download-subtitle {
    font-size: 16px;
    line-height: 1.5;
    margin-bottom: 40px;
  }
  
  .download-options {
    gap: 32px;
  }
  
  .qr-download {
    flex-direction: column;
    text-align: center;
    gap: 20px;
    padding: 24px;
  }
  
  .qr-text h4 {
    font-size: 18px;
    margin-bottom: 8px;
  }
  
  .app-store-buttons {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }
  
  .app-store-btn {
    width: 220px;
    justify-content: center;
    padding: 14px 20px;
  }
  
  .btn-text {
    align-items: center;
  }
  
  .download-on {
    font-size: 11px;
  }
  
  .store-name {
    font-size: 15px;
  }
  
  .desktop-downloads {
    margin-top: 40px;
  }
  
  .desktop-title {
    font-size: 16px;
    text-align: center;
    margin-bottom: 20px;
  }
  
  .platform-downloads {
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
  }
  
  .platform-btn {
    padding: 12px 16px;
    font-size: 14px;
    min-width: 100px;
  }
  
  .phone-mockup {
    width: 240px;
    height: 480px;
    margin: 0 auto;
  }
  
  .download-right {
    order: -1;
  }
  
  /* FAQ Mobile Optimization */
  .faq-section {
    padding: 60px 0;
  }
  
  .faq-section h2 {
    font-size: 28px;
    margin-bottom: 40px;
  }
  
  .faq-list {
    margin: 0 16px;
  }
  
  .faq-question {
    padding: 18px 20px;
    font-size: 16px;
    min-height: 60px;
  }
  
  .faq-question i {
    font-size: 16px;
    min-width: 16px;
  }
  
  .faq-answer {
    font-size: 15px;
    line-height: 1.6;
  }
  
  .final-cta {
    margin-top: 50px;
    padding: 0 16px;
  }
  
  .final-cta h3 {
    font-size: 24px;
    margin-bottom: 24px;
  }
  
  .cta-button {
    padding: 16px 32px;
    font-size: 16px;
    border-radius: 12px;
    min-width: 200px;
  }
}

@media (max-width: 480px) {
  /* Header Small Screen */
  .nav-container {
    padding: 8px 12px;
  }
  
  .nav-logo {
    font-size: 20px;
  }
  
  .nav-logo i {
    font-size: 24px;
  }
  
  .login-btn, .register-btn {
    padding: 6px 10px;
    font-size: 13px;
  }
  
  .mobile-menu-toggle {
    padding: 8px;
    font-size: 16px;
  }
  
  /* Hero Section Small Screen */
  .container {
    padding: 0 12px;
  }
  
  .hero-section {
    padding: 60px 0 50px;
  }
  
  .hero-container {
    gap: 24px;
    padding: 0 12px;
  }
  
  .count-number {
    font-size: 32px;
    letter-spacing: -1px;
  }
  
  .hero-title {
    font-size: 24px;
    margin-bottom: 20px;
  }
  
  .register-form {
    max-width: 320px;
    gap: 10px;
  }
  
  .email-input {
    padding: 14px 16px;
    font-size: 15px;
  }
  
  .register-submit {
    padding: 14px 16px;
    font-size: 15px;
  }
  
  .download-links {
    margin-top: 24px;
  }
  
  .app-links {
    gap: 12px;
  }
  
  .app-link {
    width: 44px;
    height: 44px;
    font-size: 18px;
  }
  
  /* Price Ticker Small Screen */
  .price-ticker {
    margin: 0 12px;
    padding: 16px;
  }
  
  .price-ticker h3 {
    font-size: 16px;
    margin-bottom: 16px;
  }
  
  .coin-item {
    padding: 12px 0;
  }
  
  .coin-icon {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }
  
  .coin-name {
    font-size: 15px;
  }
  
  .coin-fullname {
    font-size: 12px;
  }
  
  .price {
    font-size: 15px;
  }
  
  .change {
    font-size: 12px;
    padding: 3px 6px;
  }
  
  /* Download Section Small Screen */
  .mobile-download {
    padding: 50px 0;
  }
  
  .download-title {
    font-size: 24px;
    margin-bottom: 12px;
  }
  
  .download-subtitle {
    font-size: 14px;
    margin-bottom: 32px;
  }
  
  .download-options {
    gap: 20px;
  }
  
  .qr-download {
    padding: 16px;
    gap: 16px;
  }
  
  .qr-code {
    width: 60px;
    height: 60px;
  }
  
  .qr-image {
    font-size: 24px;
  }
  
  .qr-text h4 {
    font-size: 16px;
  }
  
  .qr-text p {
    font-size: 13px;
  }
  
  .app-store-buttons {
    gap: 10px;
  }
  
  .app-store-btn {
    width: 200px;
    padding: 12px 16px;
    min-width: auto;
  }
  
  .app-store-btn i {
    font-size: 24px;
  }
  
  .download-on {
    font-size: 10px;
  }
  
  .store-name {
    font-size: 14px;
  }
  
  .desktop-downloads {
    margin-top: 32px;
  }
  
  .desktop-title {
    font-size: 15px;
    margin-bottom: 16px;
  }
  
  .platform-btn {
    padding: 10px 12px;
    font-size: 13px;
    min-width: 80px;
  }
  
  .phone-mockup {
    width: 180px;
    height: 360px;
  }
  
  .portfolio-value .value {
    font-size: 20px;
  }
  
  .status-bar {
    padding: 8px 16px 6px;
    font-size: 12px;
  }
  
  .app-content {
    padding: 12px 16px;
  }
  
  /* FAQ Small Screen */
  .faq-section {
    padding: 50px 0;
  }
  
  .faq-section h2 {
    font-size: 24px;
    margin-bottom: 32px;
  }
  
  .faq-list {
    margin: 0 12px;
  }
  
  .faq-question {
    padding: 14px 16px;
    font-size: 15px;
    min-height: 56px;
  }
  
  .faq-question i {
    font-size: 14px;
  }
  
  .faq-answer {
    padding: 0 16px;
    font-size: 14px;
  }
  
  .faq-item.active .faq-answer {
    padding: 0 16px 14px;
  }
  
  .final-cta {
    margin-top: 40px;
    padding: 0 12px;
  }
  
  .final-cta h3 {
    font-size: 20px;
    margin-bottom: 20px;
  }
  
  .cta-button {
    padding: 14px 28px;
    font-size: 15px;
    min-width: 180px;
  }
  
  /* Mobile Navigation Small Screen */
  .mobile-nav {
    width: 260px;
  }
  
  .mobile-nav-header {
    padding: 16px;
  }
  
  .mobile-nav-logo {
    font-size: 18px;
  }
  
  .mobile-nav-close {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
  
  .mobile-nav-link {
    padding: 14px 16px;
    font-size: 15px;
  }
  
  .mobile-nav-actions {
    padding: 16px;
  }
  
  .mobile-login-btn, .mobile-register-btn {
    padding: 12px;
    font-size: 15px;
  }
  
  .mobile-theme-btn, .mobile-lang-btn {
    padding: 10px;
    font-size: 13px;
  }
}

/* 动画效果 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-left > * {
  animation: fadeInUp 0.8s ease-out forwards;
}

.hero-left > *:nth-child(1) { animation-delay: 0.1s; }
.hero-left > *:nth-child(2) { animation-delay: 0.2s; }
.hero-left > *:nth-child(3) { animation-delay: 0.3s; }

.price-ticker {
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Footer Styles */
.footer {
  background: var(--bg-primary);
  margin-top: auto;
}

/* Newsletter Section */
.newsletter-section {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  padding: 60px 0;
  position: relative;
  overflow: hidden;
}

.newsletter-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" width="10" height="10" patternUnits="userSpaceOnUse"><circle cx="5" cy="5" r="1" fill="rgba(0,0,0,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
  opacity: 0.3;
}

.newsletter-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  position: relative;
  z-index: 1;
}

.newsletter-left {
  display: flex;
  align-items: center;
  gap: 20px;
  color: #000;
}

.newsletter-icon {
  width: 60px;
  height: 60px;
  background: rgba(0, 0, 0, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #000;
}

.newsletter-text h3 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #000;
}

.newsletter-text p {
  font-size: 16px;
  color: rgba(0, 0, 0, 0.8);
  line-height: 1.5;
}

.newsletter-form {
  display: flex;
  gap: 16px;
  min-width: 400px;
}

.newsletter-input {
  flex: 1;
  padding: 16px 20px;
  border: none;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.9);
  color: #000;
  font-size: 16px;
  outline: none;
  transition: all 0.3s ease;
}

.newsletter-input:focus {
  background: rgba(255, 255, 255, 1);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.1);
}

.newsletter-input::placeholder {
  color: rgba(0, 0, 0, 0.6);
}

.newsletter-btn {
  padding: 16px 32px;
  background: #000;
  color: var(--accent-primary);
  border: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.newsletter-btn:hover {
  background: rgba(0, 0, 0, 0.8);
  transform: translateY(-2px);
}

/* Main Footer */
.footer-main {
  background: var(--bg-secondary);
  padding: 80px 0 40px;
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 60px;
}

.footer-section {
  display: flex;
  flex-direction: column;
}

/* Company Info Section */
.company-info {
  max-width: 400px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 28px;
  font-weight: bold;
  color: var(--accent-primary);
  margin-bottom: 24px;
}

.footer-logo i {
  font-size: 32px;
}

.company-description {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
  font-size: 16px;
}

.company-stats {
  display: flex;
  gap: 32px;
  margin-bottom: 32px;
}

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

.stat-number {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-muted);
}

.social-links {
  display: flex;
  gap: 16px;
}

.social-link {
  width: 44px;
  height: 44px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 18px;
  transition: all 0.3s ease;
}

.social-link:hover {
  background: var(--accent-primary);
  color: #000;
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(240, 185, 11, 0.3);
}

/* Footer Links */
.footer-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.6;
  transition: all 0.3s ease;
  display: block;
  padding: 4px 0;
}

.footer-links a:hover {
  color: var(--accent-primary);
  transform: translateX(4px);
}

/* Footer Bottom */
.footer-bottom {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 24px 0;
}

.footer-bottom-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.footer-bottom-left {
  display: flex;
  align-items: center;
  gap: 32px;
}

.copyright {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0;
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.3s ease;
}

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

.footer-bottom-right {
  display: flex;
  align-items: center;
  gap: 32px;
}

.security-badges {
  display: flex;
  gap: 20px;
}

.badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
}

.badge i {
  color: var(--accent-primary);
  font-size: 14px;
}

.language-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.language-footer:hover {
  background: var(--card-bg);
  color: var(--text-primary);
}

.language-footer i {
  color: var(--accent-primary);
}

/* Footer Responsive */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 40px;
  }
  
  .company-info {
    grid-column: 1 / -1;
    max-width: none;
    margin-bottom: 20px;
  }
  
  .company-stats {
    justify-content: center;
  }
  
  .social-links {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .newsletter-section {
    padding: 40px 0;
  }
  
  .newsletter-content {
    flex-direction: column;
    text-align: center;
    gap: 28px;
  }
  
  .newsletter-left {
    gap: 16px;
  }
  
  .newsletter-icon {
    width: 50px;
    height: 50px;
    font-size: 20px;
  }
  
  .newsletter-text h3 {
    font-size: 24px;
  }
  
  .newsletter-text p {
    font-size: 15px;
    opacity: 0.9;
  }
  
  .newsletter-form {
    min-width: auto;
    width: 100%;
    max-width: 400px;
    gap: 12px;
  }
  
  .newsletter-input {
    padding: 14px 18px;
    font-size: 15px;
    border-radius: 10px;
  }
  
  .newsletter-btn {
    padding: 14px 24px;
    font-size: 15px;
    border-radius: 10px;
  }
  
  .footer-main {
    padding: 60px 0 32px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
  
  .company-info {
    grid-column: 1 / -1;
    text-align: center;
    margin-bottom: 32px;
  }
  
  .footer-logo {
    justify-content: center;
    font-size: 26px;
  }
  
  .company-description {
    max-width: 500px;
    margin: 0 auto 28px;
    font-size: 15px;
  }
  
  .company-stats {
    justify-content: center;
    gap: 24px;
    margin-bottom: 28px;
  }
  
  .stat-number {
    font-size: 20px;
  }
  
  .stat-label {
    font-size: 13px;
  }
  
  .social-links {
    justify-content: center;
    gap: 14px;
  }
  
  .social-link {
    width: 42px;
    height: 42px;
    font-size: 17px;
  }
  
  .footer-title {
    font-size: 17px;
    margin-bottom: 20px;
    text-align: center;
  }
  
  .footer-links {
    text-align: center;
  }
  
  .footer-links a {
    padding: 8px 12px;
    margin: 2px 0;
    border-radius: 6px;
    font-size: 14px;
  }
  
  .footer-links a:hover {
    background: var(--bg-tertiary);
    transform: none;
    color: var(--accent-primary);
  }
  
  .footer-bottom {
    padding: 20px 0;
  }
  
  .footer-bottom-content {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
  
  .footer-bottom-left {
    flex-direction: column;
    gap: 16px;
  }
  
  .footer-bottom-links {
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
  }
  
  .footer-bottom-links a {
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.3s ease;
  }
  
  .footer-bottom-links a:hover {
    background: var(--bg-tertiary);
  }
  
  .security-badges {
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
  }
  
  .badge {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .newsletter-section {
    padding: 20px 0;
  }
  
  .newsletter-content {
    gap: 16px;
  }
  
  .newsletter-left {
    flex-direction: column;
    text-align: center;
    gap: 10px;
  }
  
  .newsletter-icon {
    width: 40px;
    height: 40px;
    font-size: 16px;
    margin: 0 auto;
  }
  
  .newsletter-text h3 {
    font-size: 18px;
    margin-bottom: 4px;
  }
  
  .newsletter-text p {
    font-size: 13px;
    line-height: 1.3;
  }
  
  .newsletter-form {
    flex-direction: column;
    gap: 8px;
    max-width: 300px;
  }
  
  .newsletter-input {
    padding: 12px 16px;
    font-size: 15px;
    border-radius: 10px;
  }
  
  .newsletter-btn {
    padding: 12px 18px;
    font-size: 15px;
    border-radius: 10px;
    font-weight: 600;
  }
  
  .footer-main {
    padding: 32px 0 20px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .company-info {
    margin-bottom: 16px;
  }
  
  .footer-logo {
    font-size: 22px;
    margin-bottom: 16px;
  }
  
  .company-description {
    font-size: 13px;
    line-height: 1.5;
    margin-bottom: 16px;
  }
  
  .company-stats {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
    text-align: center;
    margin-bottom: 16px;
  }
  
  .stat-item {
    padding: 8px 6px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
  }
  
  .stat-number {
    font-size: 16px;
    margin-bottom: 1px;
  }
  
  .stat-label {
    font-size: 11px;
    opacity: 0.8;
  }
  
  .social-links {
    gap: 8px;
    margin-bottom: 12px;
    justify-content: center;
  }
  
  .social-link {
    width: 36px;
    height: 36px;
    font-size: 14px;
    border-radius: 8px;
  }
  
  .footer-section {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 16px 12px;
  }
  
  .footer-title {
    font-size: 15px;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
  }
  
  .footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }
  
  .footer-links li {
    margin-bottom: 0;
  }
  
  .footer-links a {
    padding: 8px 6px;
    margin: 0;
    border-radius: 6px;
    font-size: 12px;
    line-height: 1.3;
    text-align: left;
    display: block;
    transition: all 0.3s ease;
  }
  
  .footer-links a:hover {
    background: var(--card-bg);
    color: var(--accent-primary);
    transform: none;
  }
  
  .footer-bottom {
    padding: 16px 0;
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
  }
  
  .footer-bottom-content {
    gap: 12px;
    display: flex;
    flex-direction: column;
  }
  
  .footer-bottom-left {
    gap: 10px;
    order: 2;
  }
  
  .copyright {
    font-size: 12px;
    opacity: 0.8;
    text-align: center;
    padding: 10px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 8px;
    font-weight: 400;
  }
  
  .footer-bottom-right {
    order: 1;
  }
  
  .footer-bottom-links {
    display: grid;
    grid-template-columns: 1fr;
    gap: 6px;
    margin-bottom: 10px;
  }
  
  .footer-bottom-links a {
    padding: 10px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 12px;
    font-weight: 400;
    text-align: center;
    transition: all 0.3s ease;
  }
  
  .footer-bottom-links a:hover {
    background: var(--card-bg);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
  }
  
  .footer-bottom-right {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  
  .security-badges {
    display: grid;
    grid-template-columns: 1fr;
    gap: 6px;
  }
  
  .badge {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 400;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
  }
  
  .badge:hover {
    background: var(--card-bg);
    border-color: var(--accent-primary);
  }
  
  .badge i {
    font-size: 14px;
    color: var(--accent-primary);
  }
  
  .language-footer {
    padding: 12px 20px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border: none;
    border-radius: 10px;
    color: #000;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 3px 10px rgba(240, 185, 11, 0.3);
    margin-bottom: 6px;
  }
  
  .language-footer:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(240, 185, 11, 0.4);
  }
  
  .language-footer:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(240, 185, 11, 0.3);
  }
  
  .language-footer i {
    color: #000;
    font-size: 16px;
  }
}