body {
    background-color: #212121;
}
.slider-container {
    width: 1700px;
    height: 880px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}
.slider {
    width: 400%;
    height: 100%;
    display: flex;
    transition: transform 0.5s ease-in-out;
}
.slide {
    width: 25%;
    height: 100%;
}
.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.slider-buttons {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 20px;
}
.slider-button {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
    background-color: #fff;
    cursor: pointer;
}
.slider-button.active {
    background-color: #f17d38;
}
.nav-bar0{
    background-color: #000;
    height: 60px;
    display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 20px;
        margin: 0 auto;
}
.nav-bar {
        background-color: #000;
        width: 1700px;
        height: 60px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 20px;
        margin: 0 auto;
}
.nav-menu {
    display: flex;
    list-style: none;
    height: 60px;
    margin: 0;
    padding: 0;
}
.nav-menu li {
    width: 100px;
    height: 60px;
    line-height: 60px;
    text-align: center;
}
.nav-menu li a {
    display: block;
    color: white;
    text-decoration: none;
    width: 100px;
    height: 58px;
    padding: 0 15px;
}
.logo img {
    height: 40px;
}
.nav-menu li a:hover {
    color: #f17d38;
    transition: color 0.3s ease;
}
.dqli {
    color: #f17d38 !important;
    border-bottom: 2px solid #f17d38 !important;
}
.qiehuan{
    position: relative;
    top: 16%;
    width: 30px;
}
.app-container {
    width: 1500px;
    margin: 50px auto;
    position: relative;
    overflow: hidden;
}
.app-slider {
    display: flex;
    transition: transform 0.5s ease;
}
.app-slide {
    min-width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.app-image {
    left: 100px;
    width: 520px;
}
.app-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}
.app-content {
    width: 800px;
    padding: 50px;
}
.app-content h1 {
    font-size: 48px;
    color: #fff;
    margin-bottom: 30px;
}
.app-content p {
    font-size: 18px;
    color: #dbdbdb;
    line-height: 1.8;
    margin-bottom: 20px;
}
.app-download {
    display: inline-block;
    padding: 15px 40px;
    background-color: #f17d38;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-size: 18px;
    margin-top: 30px;
    transition: background-color 0.3s ease;
}
.app-download:hover {
    background-color: #e56a25;
}
.slider-nav {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}
.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #dbdbdb;
    cursor: pointer;
    margin: 0 5px;
}
.slider-dot:nth-child(1) {
    background: #dbdbdb;
}
.slider-dot:nth-child(2) {
    background: #dbdbdb; 
}
.slider-dot:nth-child(3) {
    background: #dbdbdb;
}
.slider-dot.active {
    background: #f17d38;
}