* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(135deg, #0a1128 0%, #0d1b3a 100%);
  color: #ffffff;
  line-height: 1.6;
}

/* Header */
.header {
  background: rgba(6, 21, 55, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 80px 20px 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.header::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 201, 255, 0.1) 0%, transparent 70%);
  animation: rotate 30s infinite linear;
  z-index: 0;
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.logo {
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, #00c9ff, #0077ff);
  border-radius: 20px;
  display: inline-block;
  margin: 20px auto 24px;
  position: relative;
  box-shadow: 0 0 30px rgba(0, 201, 255, 0.4);
  animation: pulse 2s infinite ease-in-out;
}

.logo img {
  width: 120px;
  height: 120px;
  border-radius: 20px;
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 30px rgba(0, 201, 255, 0.4);
  }
  50% {
    box-shadow: 0 0 50px rgba(0, 201, 255, 0.7);
  }
}

.app-name {
  font-size: 38px;
  font-weight: 800;
  background: linear-gradient(to right, #00c9ff, #00f0ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin: 0 0 12px;
  letter-spacing: 1px;
}

.app-slogan {
  font-size: 18px;
  color: #a0d4ff;
  margin: 0 0 16px;
  font-weight: 500;
}

.app-desc {
  font-size: 14px;
  color: #8ab8ff;
  max-width: 500px;
  margin: 0 auto 24px;
}
.browser-tip {
 font-size: 14px;
  color: #8ab8ff;
  max-width: 500px;
  margin: 0 auto 24px;
}
.btn-group {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
  z-index: 10;
}

.btn {
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  outline: none;
  min-width: 120px;
}

.btn-download {
  background: linear-gradient(to right, #00c9ff, #0077ff);
  color: white;
  box-shadow: 0 4px 15px rgba(0, 201, 255, 0.4);
}

.btn-download:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 201, 255, 0.6);
}

.btn-install {
  background: rgba(26, 46, 94, 0.6);
  color: #00c9ff;
  border: 1px solid #00c9ff;
}

.btn-install:hover {
  background: rgba(26, 46, 94, 0.8);
  transform: translateY(-2px);
}

/* Guide Section */
.guide {
  padding: 60px 20px;
  max-width: 700px;
  margin: 0 auto;
}

.guide-title {
  font-size: 24px;
  margin-bottom: 30px;
  text-align: center;
  color: #00c9ff;
  font-weight: 700;
}

.step {
  background: rgba(26, 46, 94, 0.4);
  border: 1px solid rgba(0, 201, 255, 0.2);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 20px;
  display: flex;
  align-items: flex-start;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

.step:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
  border-color: rgba(0, 201, 255, 0.4);
}

.step-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #00c9ff, #0077ff);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 16px;
  color: white;
  font-weight: bold;
  font-size: 16px;
  flex-shrink: 0;
}

.step-content {
  flex: 1;
}

.step-title {
  font-weight: 700;
  color: #00e0ff;
  margin-bottom: 6px;
  font-size: 16px;
}

.step-desc {
  font-size: 13px;
  color: #a0cfff;
  line-height: 1.5;
}

/* CTA Section */
.cta {
  background: linear-gradient(135deg, #001a33, #002a55);
  color: white;
  padding: 40px 20px;
  border-radius: 20px;
  margin: 40px auto;
  max-width: 600px;
  text-align: center;
  border: 1px solid rgba(0, 201, 255, 0.3);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.cta-title {
  font-size: 26px;
  margin-bottom: 12px;
  font-weight: 800;
  background: linear-gradient(to right, #00f0ff, #00c9ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.cta-desc {
  font-size: 15px;
  margin-bottom: 24px;
  color: #a0d4ff;
}

.cta-btn {
  background: white;
  color: #0077ff;
  border: none;
  padding: 12px 32px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 119, 255, 0.3);
}

.cta-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(0, 119, 255, 0.5);
}

.support {
  font-size: 12px;
  color: #8ab8ff;
  margin-top: 12px;
}

/* Footer */
footer {
  text-align: center;
  padding: 24px 20px 40px;
  color: #6a90bb;
  font-size: 13px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Responsive */
@media (max-width: 600px) {
  .app-name {
    font-size: 32px;
  }
  .app-slogan {
    font-size: 16px;
  }
  .guide-title {
    font-size: 22px;
  }
  .btn {
    padding: 10px 20px;
    font-size: 14px;
  }
}