body {
  background-color: #ffffff;
  color: white;
  font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
}

/* 基础样式 */
.box {
  background-color: #fe0000;
}

/* 标题样式 */
.main-title {
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  font-weight: bold;
  color: #f5e663;
}

.sub-title {
  font-size: clamp(1rem, 3vw, 1.2rem);
}

/* 按钮动画效果 */
.function-btn {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-decoration: none;
  color: white;
}

.function-btn:hover,
.function-btn:active {
  transform: scale(1.08);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
  color: white;
}

/* 按钮图标样式 */
.btn-icon {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: #0066cc;
  margin: 0 auto;
}

.btn-icon img {
  width: 100%;
}

.btn-text {
  margin-top: 12px;
  font-size: 18px;
  display: block;
}

.logo {
  width: 100%;
  margin: 70px auto;
}
.bottom-circle{
  width: 100%;
  height: 80px;
  background-color: #fe0000;
  border-bottom-left-radius: 50% 100%;
  border-bottom-right-radius: 50% 100%;
}

.foot img {
  width: 100%;
}