html {
  font-size: 10px;
}

body {
  margin: 0;
  padding: 0;
  font-family: "Microsoft YaHei";
}

/* Modern Sticky Header */
.main-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 720px;
  margin: 0 auto;
  padding: 0.12rem 0.12rem;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.header-logo img {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 0.15rem;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.header-logo span {
  font-size: 0.26rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, #d4af37 0%, #aa8222 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-nav {
  display: flex;
  gap: 0.25rem;
}

.header-nav a {
  font-size: 0.22rem;
  font-weight: 500;
  color: #ffffff;
  text-decoration: none;
  transition: color 0.3s ease;
}

.header-nav a:hover {
  color: #d4af37;
}

.container {
  position: relative;
  max-width: 720px;
  height: 100%;
  margin: 0 auto;
  z-index: 0;
}

.kefu a {
  position: fixed;
  top: 10%;
  right: 2%;
  width: 1.2rem;
  height: auto;
  z-index: 999;
  display: block;
}

.kefu a img {
  width: 100%;
  height: auto;
  display: block;
}

.downBtn {
  /* absolute positioned button on banner */
  position: absolute;
  top: 61%;
  left: 50%;
  transform: translateX(-50%);
  width: 4.6rem;
  height: 1rem;
  cursor: pointer;
  z-index: 100;
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, #FFD700 0%, #FF8C00 100%);
  border-radius: 1rem;
  box-shadow: 0 8px 32px rgba(255, 140, 0, 0.4);
  border: 4px solid rgba(255, 255, 255, 0.3);
  animation: pulse-center 2s infinite ease-in-out;
}

@media (min-width: 720px) {
  .downBtn {
    width: 4rem;
    height: 0.75rem;
    top: 98%;
  }
}

.downBtn a {
  display: flex;
  width: 100%;
  height: 100%;
  justify-content: center;
  align-items: center;
  color: #ffffff;
  font-size: 0.35rem;
  font-weight: 600;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 2px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* .downBtn img {
  width: 3.7rem;
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  right: 50%;
  margin-left: -1.85rem;
  height: 1rem;
  background-image: url("../img/btn_download.png");
  background-size: 100% 100%;
  z-index: 999;
} */

/* .container .downBtn {
  position: absolute;
  top: 41.5%;
  left: 30%;
  width: 55%;
  height: 1.2rem;
  background-image: url("../img/blue_install_btn.png");
  background-size: 80% 80%;
  background-repeat: no-repeat;
} */

.container .downNum {
  position: absolute;
  top: 49.6%;
  right: 37%;
  width: 2rem;
}

.bannerBox {
  position: absolute;
  left: 5%;
  top: 52%;
  width: 89%;
  height: 3.3rem;
}

.banner {
  margin: 0 auto;
  width: 90%;
  height: 100%;
  overflow: hidden;
}

.swiper-slide>img {
  width: 100%;
}

.container .footer {
  position: relative;
  bottom: auto;
  right: auto;
  width: 100%;
  min-height: 1.5rem;
  color: #ffffff;
  background-color: #1a1a1a;
  padding: 0.4rem 0;
}

.footer p {
  padding: 0;
  margin: 0;
}

/* Content area styling */
.content {

  color: #333;
  line-height: 1.6;
}

.content h1 {
  font-size: 0.4rem;
  color: #000000;
  margin: 0.5rem 0 0.5rem 0;
  padding: 0 0.4rem;
  font-weight: bold;
}

.content h2 {
  font-size: 0.35rem;
  color: #333;
  margin: 0.6rem 0 0.3rem 0;
  padding: 0 0.4rem;
  font-weight: bold;
}

.content p {
  font-size: 0.28rem;
  color: #555;
  margin: 0 0 0.4rem 0;
  padding: 0 0.4rem;
  line-height: 1.6;
  text-align: left;
}

.content ul {
  padding-left: 0.5rem;
  margin: 0 0 0.4rem 0;
}

.content li {
  font-size: 0.28rem;
  color: #555;
  margin-bottom: 0.2rem;
  line-height: 1.5;
}

.content strong {
  color: #000000;
  font-weight: bold;
}

/* Footer styling */
.footer {
  position: relative;
  background-color: #1a1a1a;
  padding: 0.4rem 0.5rem;
  text-align: center;
  width: 100%;
}

.footer p {
  color: #fff;
  font-size: 0.24rem;
  margin-bottom: 0;
}


@keyframes pulse-center {
  0% {
    transform: translateX(-50%) scale(1);
  }

  50% {
    transform: translateX(-50%) scale(1.05);
  }

  100% {
    transform: translateX(-50%) scale(1);
  }
}

@keyframes pulse-normal {
  0% {
    transform: scale(1);
    box-shadow: 0 6px 15px rgba(236, 111, 102, 0.4);
  }

  50% {
    transform: scale(1.08);
    box-shadow: 0 10px 25px rgba(236, 111, 102, 0.6);
  }

  100% {
    transform: scale(1);
    box-shadow: 0 6px 15px rgba(236, 111, 102, 0.4);
  }
}