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

:root {
  /* Tron 经典青蓝霓虹 */
  --tron-cyan: #00D4FF;
  --tron-cyan-light: #7AF0FF;
  --tron-blue: #0066FF;
  --tron-blue-deep: #0033AA;
  --tron-dark: #0a0e1a;
  --tron-bg: #05070f;
  --tron-card: #0d1526;
  --tron-accent: #00D4FF;
  --tron-green: #00FFAA;
  --tron-gold: #FFD700;
  --gradient-main: linear-gradient(135deg, #00D4FF, #0066FF, #0033AA);
  --gradient-dark: linear-gradient(180deg, #05070f 0%, #0a0e1a 100%);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--gradient-dark);
  color: #c0d0e0;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ═══ 顶部导航 ═══ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(5, 7, 15, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 212, 255, 0.25);
  padding: 0 20px;
  height: 60px;
  display: flex; align-items: center; justify-content: space-between;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.08);
}
.navbar .logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 20px; font-weight: 700; color: #fff;
  text-shadow: 0 0 12px rgba(0, 212, 255, 0.6);
}
.navbar .logo span { color: var(--tron-cyan); }
.navbar .badge {
  background: var(--gradient-main);
  color: #fff; font-size: 11px; padding: 3px 10px;
  border-radius: 20px; font-weight: 600;
  box-shadow: 0 0 14px rgba(0, 212, 255, 0.5);
}

/* ═══ Hero 区域 ═══ */
.hero {
  padding: 100px 20px 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 50% 50%, rgba(0, 212, 255, 0.12) 0%, transparent 50%);
  animation: pulse 4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}
.hero h1 {
  font-size: 36px; font-weight: 800; position: relative;
  background: linear-gradient(135deg, #fff, #7AF0FF, #00D4FF);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: 16px; line-height: 1.3;
  filter: drop-shadow(0 0 16px rgba(0, 212, 255, 0.35));
}
.hero .subtitle {
  font-size: 18px; color: #8aa0b8; margin-bottom: 30px; position: relative;
}
.hero .price-tag {
  display: inline-flex; align-items: center; gap: 12px;
  background: rgba(0, 212, 255, 0.07);
  border: 2px solid var(--tron-cyan);
  border-radius: 16px; padding: 16px 32px;
  position: relative;
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.25), inset 0 0 20px rgba(0, 212, 255, 0.05);
}
.hero .price-tag .amount {
  font-size: 48px; font-weight: 900; color: var(--tron-cyan);
  text-shadow: 0 0 24px rgba(0, 212, 255, 0.7);
}
.hero .price-tag .unit {
  font-size: 20px; color: var(--tron-cyan-light); font-weight: 600;
  text-shadow: 0 0 12px rgba(0, 212, 255, 0.5);
}
.hero .price-tag .label {
  font-size: 14px; color: #8aa0b8;
}

/* ═══ 统计条 ═══ */
.stats-bar {
  display: flex; justify-content: center; gap: 40px;
  padding: 20px; margin: 0 20px 40px;
  background: var(--tron-card);
  border-radius: 16px;
  border: 1px solid rgba(0, 212, 255, 0.15);
  flex-wrap: wrap;
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.05);
}
.stat-item { text-align: center; }
.stat-item .num {
  font-size: 28px; font-weight: 800; color: var(--tron-green);
  text-shadow: 0 0 14px rgba(0, 255, 170, 0.5);
}
.stat-item .desc {
  font-size: 13px; color: #6f8299; margin-top: 4px;
}

/* ═══ 功能卡片 ═══ */
.section { padding: 0 20px 50px; max-width: 900px; margin: 0 auto; }
.section-title {
  font-size: 26px; font-weight: 700; color: #fff;
  text-align: center; margin-bottom: 10px;
  text-shadow: 0 0 16px rgba(0, 212, 255, 0.3);
}
.section-desc {
  font-size: 15px; color: #6f8299; text-align: center; margin-bottom: 30px;
}

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
.feature-card {
  background: var(--tron-card);
  border-radius: 16px; padding: 28px;
  border: 1px solid rgba(0, 212, 255, 0.12);
  transition: all 0.3s ease;
  position: relative; overflow: hidden;
}
.feature-card:hover {
  border-color: rgba(0, 212, 255, 0.45);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.18), 0 0 30px rgba(0, 212, 255, 0.08);
}
.feature-card .icon {
  width: 52px; height: 52px;
  background: rgba(0, 212, 255, 0.1);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; margin-bottom: 18px;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.15), inset 0 0 12px rgba(0, 212, 255, 0.05);
}
.feature-card h3 { font-size: 18px; color: #fff; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: #8aa0b8; line-height: 1.7; }

/* ═══ 对比表格 ═══ */
.compare-table {
  width: 100%; border-collapse: collapse;
  background: var(--tron-card);
  border-radius: 16px; overflow: hidden;
  border: 1px solid rgba(0, 212, 255, 0.12);
}
.compare-table th {
  background: rgba(0, 212, 255, 0.12);
  color: #fff; padding: 16px; font-size: 14px; font-weight: 600;
  text-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}
.compare-table td {
  padding: 14px 16px; border-bottom: 1px solid rgba(0, 212, 255, 0.06);
  font-size: 14px; color: #b0c0d0;
}
.compare-table tr:last-child td { border-bottom: none; }
.compare-table .highlight { color: var(--tron-green); font-weight: 700; }
.compare-table .old-price { color: #ff6b6b; text-decoration: line-through; }

/* ═══ 步骤流程 ═══ */
.steps { display: flex; flex-direction: column; gap: 20px; }
.step {
  display: flex; gap: 20px; align-items: flex-start;
  background: var(--tron-card);
  border-radius: 16px; padding: 24px;
  border: 1px solid rgba(0, 212, 255, 0.12);
}
.step .num {
  min-width: 44px; height: 44px;
  background: var(--gradient-main);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800; color: #fff;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
}
.step h4 { font-size: 16px; color: #fff; margin-bottom: 6px; }
.step p { font-size: 14px; color: #8aa0b8; line-height: 1.6; }

/* ═══ CTA 按钮 ═══ */
.cta-section {
  text-align: center; padding: 40px 20px 60px;
}
.cta-btn {
  display: inline-flex; align-items: center; gap: 12px;
  background: var(--gradient-main);
  color: #fff; border: none;
  padding: 18px 48px; border-radius: 60px;
  font-size: 20px; font-weight: 700;
  cursor: pointer; position: relative;
  box-shadow: 0 8px 32px rgba(0, 212, 255, 0.35);
  transition: all 0.3s ease;
  animation: glow 2s ease-in-out infinite;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}
.cta-btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 48px rgba(0, 212, 255, 0.6);
}
@keyframes glow {
  0%, 100% { box-shadow: 0 8px 32px rgba(0, 212, 255, 0.35); }
  50% { box-shadow: 0 8px 48px rgba(0, 212, 255, 0.55), 0 0 80px rgba(0, 212, 255, 0.2); }
}
.cta-note {
  margin-top: 16px; font-size: 13px; color: #6f8299;
}

/* ═══ FAQ ═══ */
.faq-item {
  background: var(--tron-card);
  border-radius: 12px; margin-bottom: 12px;
  border: 1px solid rgba(0, 212, 255, 0.12);
  overflow: hidden;
}
.faq-q {
  padding: 18px 20px;
  font-size: 15px; font-weight: 600; color: #fff;
  cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
}
.faq-q::after { content: '▸'; color: var(--tron-cyan); transition: transform 0.3s; }
.faq-item.open .faq-q::after { transform: rotate(90deg); }
.faq-a {
  padding: 0 20px; max-height: 0; overflow: hidden;
  transition: all 0.3s ease; font-size: 14px; color: #8aa0b8; line-height: 1.7;
}
.faq-item.open .faq-a { padding: 0 20px 18px; max-height: 200px; }

/* ═══ 底部 ═══ */
.footer {
  text-align: center; padding: 30px 20px;
  border-top: 1px solid rgba(0, 212, 255, 0.08);
  font-size: 12px; color: #4a5a70;
}

/* ═══ 弹窗 ═══ */
.modal-overlay {
  display: none;
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(3, 5, 15, 0.85);
  backdrop-filter: blur(8px);
  z-index: 1000;
  align-items: center; justify-content: center;
  padding: 20px;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--tron-card);
  border-radius: 24px;
  width: 100%; max-width: 460px;
  border: 1px solid rgba(0, 212, 255, 0.35);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.7), 0 0 50px rgba(0, 212, 255, 0.15);
  overflow: hidden;
  animation: modalIn 0.4s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.9) translateY(20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-header {
  background: var(--gradient-main);
  padding: 24px; text-align: center;
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}
.modal-header h2 {
  color: #fff; font-size: 22px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  text-shadow: 0 0 12px rgba(255, 255, 255, 0.3);
}
.modal-header p { color: rgba(255,255,255,0.85); font-size: 14px; margin-top: 6px; }
.modal-body { padding: 28px; }
.address-box {
  background: rgba(0, 0, 0, 0.35);
  border: 2px dashed var(--tron-cyan);
  border-radius: 14px; padding: 20px;
  text-align: center; margin-bottom: 20px;
  box-shadow: inset 0 0 24px rgba(0, 212, 255, 0.06), 0 0 20px rgba(0, 212, 255, 0.1);
}
.address-label {
  font-size: 13px; color: #8aa0b8; margin-bottom: 10px;
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
.address-text {
  font-family: 'Courier New', monospace;
  font-size: 15px; color: var(--tron-gold);
  word-break: break-all; line-height: 1.6;
  letter-spacing: 0.5px; font-weight: 600;
  user-select: all;
  text-shadow: 0 0 8px rgba(255, 215, 0, 0.3);
}
.copy-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 14px;
  background: var(--gradient-main);
  color: #fff; border: none; border-radius: 12px;
  font-size: 16px; font-weight: 600;
  cursor: pointer; transition: all 0.3s;
  margin-bottom: 16px;
  box-shadow: 0 4px 18px rgba(0, 212, 255, 0.3);
}
.copy-btn:hover { opacity: 0.92; transform: scale(1.02); box-shadow: 0 6px 24px rgba(0, 212, 255, 0.5); }
.copy-btn.copied { background: linear-gradient(135deg, #00d4aa, #00b894); box-shadow: 0 4px 18px rgba(0, 212, 170, 0.3); }
.modal-tips {
  background: rgba(255, 215, 0, 0.04);
  border: 1px solid rgba(255, 215, 0, 0.15);
  border-radius: 10px; padding: 14px;
  font-size: 13px; color: #b0c0d0; line-height: 1.7;
}
.modal-tips li { margin-bottom: 4px; list-style: none; }
.modal-tips li::before { content: '✓ '; color: var(--tron-green); font-weight: 700; }
.close-btn {
  display: block; width: 100%;
  padding: 14px; margin-top: 20px;
  background: rgba(255, 255, 255, 0.04);
  color: #6f8299; border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px; font-size: 15px;
  cursor: not-allowed; transition: all 0.3s;
}
.close-btn.enabled {
  cursor: pointer; color: #fff;
  background: rgba(0, 212, 255, 0.12);
  border-color: rgba(0, 212, 255, 0.35);
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.15);
}
.close-btn.enabled:hover {
  background: rgba(0, 212, 255, 0.2);
}

/* ═══ Toast ═══ */
.toast {
  position: fixed; bottom: 40px; left: 50%; transform: translateX(-50%);
  background: var(--tron-green); color: #000;
  padding: 12px 28px; border-radius: 30px;
  font-size: 14px; font-weight: 600;
  z-index: 2000; opacity: 0;
  transition: opacity 0.3s;
  box-shadow: 0 0 24px rgba(0, 255, 170, 0.5);
}
.toast.show { opacity: 1; }

/* ═══ 响应式 ═══ */
@media (max-width: 600px) {
  .hero h1 { font-size: 26px; }
  .hero .price-tag .amount { font-size: 36px; }
  .stats-bar { gap: 20px; }
  .stat-item .num { font-size: 22px; }
  .cta-btn { font-size: 17px; padding: 16px 36px; }
  .address-text { font-size: 13px; }
}