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

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
  line-height: 1.7;
  color: #333;
  background: #f0f2f5;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  text-align: center;
}

.container {
  max-width: 800px;
  width: 100%;
  background: white;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  padding: 40px 30px;
}

.lang-switch {
  position: absolute;
  top: 16px;
  right: 16px;
  background: #e2e8f0;
  color: #4a5568;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.85em;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.lang-switch:hover {
  background: #cbd5e0;
}

.logo {
  font-size: 3.2em;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -1px;
}

.logo-prefix {
  color: #1a365d;
}

.logo-dot {
  color: #333;
}

.logo-suffix {
  color: #ff6a00;
}

.tagline {
  font-size: 1.2em;
  color: #4a5568;
  margin-bottom: 24px;
  font-weight: 500;
}

.badge {
  display: inline-block;
  background: #1a365d;
  color: white;
  padding: 8px 24px;
  border-radius: 30px;
  font-size: 0.95em;
  margin: 16px 0;
  font-weight: 600;
}

p {
  font-size: 1.05em;
  color: #4a5568;
  margin-bottom: 14px;
}

.contact {
  margin: 36px 0;
  padding: 24px;
  background: #f8fafc;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
}

.email-link {
  font-size: 1.1em;
  color: #2b6cb0;
  word-break: break-all;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px dashed #2b6cb0;
}

.email-link:hover {
  color: #1a365d;
  border-color: #1a365d;
}

.buy-btn-container {
  margin: 20px 0;
}

.buy-btn {
  display: inline-block;
  background: #ff6a00;
  color: white;
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 1.1em;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(255, 106, 0, 0.2);
  transition: all 0.2s;
}

.buy-btn:hover {
  background: #e65c00;
  transform: translateY(-2px);
}

.brand-footer {
  margin-top: 20px;
  padding: 16px 0;
  border-top: 1px solid #eee;
  font-size: 0.9em;
  color: #777;
}

.brand-footer a {
  color: #1a365d;
  text-decoration: none;
  font-weight: 500;
}

.brand-footer a:hover {
  text-decoration: underline;
}

.disclaimer {
  font-size: 0.8em;
  color: #777;
  border-top: 1px dashed #ddd;
  padding-top: 18px;
  margin-top: 24px;
}

@media (max-width: 768px) {
  .container {
    padding: 30px 20px;
    border-radius: 12px;
  }
  .logo {
    font-size: 2.4em;
  }
  .tagline {
    font-size: 1.1em;
  }
  .badge {
    font-size: 0.9em;
    padding: 6px 18px;
  }
  p {
    font-size: 1em;
  }
  .email-link {
    font-size: 1.1em;
  }
  .buy-btn {
    padding: 12px 28px;
    font-size: 1em;
  }
  .lang-switch {
    top: 12px;
    right: 12px;
    font-size: 0.8em;
    padding: 5px 10px;
  }
}

@media (max-width: 480px) {
  body {
    padding: 15px;
  }
  .container {
    padding: 24px 16px;
  }
  .logo {
    font-size: 2em;
  }
  .contact {
    padding: 20px 16px;
  }
  .email-link {
    font-size: 1.1em;
  }
  .buy-btn {
    padding: 10px 24px;
    font-size: 0.95em;
  }
}
/* 加载动画样式 */
    .loader-container {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: white;
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 99999;
      transition: opacity 0.3s ease-out;
    }

    .loader-logo {
      font-size: 2.5em;
      font-weight: 700;
      letter-spacing: -1px;
    }

    .loader-prefix {
      color: #1a365d; /* 科技蓝 */
    }

    .loader-dot {
      color: #333;
    }

    .loader-suffix {
      color: #ff6a00; /* 活力橙 */
      animation: pulse 1.5s infinite;
    }

    @keyframes pulse {
      0% { opacity: 0.7; }
      50% { opacity: 1; }
      100% { opacity: 0.7; }
    }

    /* 加载完成后淡出 */
    .loader-container.fade-out {
      opacity: 0;
      pointer-events: none;
    }