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: 50%;
    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);
    }
}