#new_header{
    width: 100%;
    background: #454343;
    top:0;
    left: 0;
    z-index: 1000;
    transition: background-color 0.1s ease, box-shadow 0.3s ease;
}

#new_header.scrolled {
    background-color: #09351f6a;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

header {
    background-color: #333;
    color: white;
}

#new_header #logo{
    display: flex;
    align-items: center;
}

#new_header #logo img{
    width: 100px;
}

.header-container{
    display: flex;
    justify-content: space-between;
    max-width: 1280px;
    margin: 0 auto;
    padding: 10px 100px;
}

.container {
    display: flex;
    justify-content: space-between;
    max-width: 1280px;
    margin: 0 auto;
    padding: 10px 100px;
}

.logo a {
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
    color: white;
    display: flex;
    align-items: center;
}

nav {
    display: flex;
    align-items: center;
}

.nav-links {
    list-style: none;
    display: flex;
    position: relative;
}

.nav-links a {
    text-decoration: none;
    color: white;
    padding: 10px 5px;
    margin: 0 10px;
    border-radius: 4px;
    transition: 0.3s;
    box-sizing: border-box;
    position: relative;
}

.nav-links a:after {    
    background: none repeat scroll 0 0 transparent;
    bottom: 3px;
    content: "";
    display: block;
    height: 2px;
    left: 0%;
    position: absolute;
    background: #d3ffec;
    transition: width 0.5s ease 0s, left 0.3s ease 0s;
    width: 0;
  }
  .nav-links a:hover:after { 
    width: calc(100%); 
    left: 0%;
  }



/* 子菜单样式 */
.submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--primary-color);
    list-style: none;
    padding: 10px 0;
    z-index: 1000;
}

/* 子菜单展开时 */
.submenu.open {
    display: block;
}

.submenu li {
    margin: 0;
}

.submenu a {
    padding: 10px 15px;
    width: 150px;
    display: block;
}

.nav-links li:hover .submenu {
    display: block;
}

/* 移动版弹出搜索框样式 */
.mobile-search-popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.popup-content {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    width: 80%;
    max-width: 400px;
    position: relative;
}

.popup-content input {
    box-sizing: border-box;
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 4px;
    border: 1px solid #ddd;
    outline: none;
}

.popup-content button {
    width: 100%;
    padding: 10px;
    background-color: #333;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.popup-content button:hover {
    background-color: #555;
}

.close-popup-area{
    display: flex;
    justify-content: space-between;
}

.close-popup-area button{
    width: 47%;
}

.close-popup {
    position: absolute;
    top: -10px;
    right: 5px;
    font-size: 24px;
    cursor: pointer;
    width: 40px;
    height: 40px;
    color:#000;
}

.menu-icon {
    display: none;
    font-size: 28px;
    cursor: pointer;
}

.mobile-search-icon {
    display: none;
    font-size: 24px;
    margin-left: 15px;
    cursor: pointer;
}

#footer {
    clear: both;
    background: var(--footer-bg-color);
    font-size: 14px;
    border-top: 4px solid var(--footer-border-color);
}

.footer-nav{
    display: flex;
    justify-content: center;
    color:#fff;
    box-sizing: border-box;
    padding-top: 20px;
    white-space: nowrap;
    flex-wrap: wrap;
}

.footer-nav span{
    margin: 5px;
}

.footer-nav a{
    color:var(--footer-link-text-color);
}

.footer-desc{
    margin: 0 auto;
    text-align: center;
    color: #FFFFFF;
    padding: 15px;
    max-width: 711px;
}

/* 手机屏幕支持 */
@media (max-width: 768px) {
    /* 禁用 :hover 在移动端显示子菜单 */
    .nav-links li:hover > .submenu {
        display: none; /* 覆盖掉 hover 的效果 */
    }

    /* 通过点击时添加 .open 类来显示子菜单 */
    .submenu.open {
        display: block !important; /* 使用 JavaScript 控制 .open 类的显示 */
    }

    .nav-links {
        display: none;
        flex-direction: column;
        background: var(--header-bg);
        position: absolute;
        top: 60px;
        right: 0;
        width: 200px;
        padding: 20px;
        z-index: 1000;
    }

    .nav-links li {
        margin: 15px 0;
    }

    .nav-links a {
        padding: 10px;
    }

    .submenu {
        position: relative;
        top: 0;
        background-color: var(--submenu-bg-color);
        width: 100%;
        padding: 0;
    }

    .submenu li {
        margin-left: 10px;
    }

    .nav-links.active {
        display: flex;
    }

    .menu-icon {
        display: block;
    }

    .container {
        padding: 10px 20px;
    }

    .header-container{
        padding: 10px 15px;
    }

    .active a{
        background-color: initial !important;
    }

    .nav-content{
        display: flex;
        align-items: center;
    }
    
    .famous-nav-item{
        min-width: 90px;
    }

    .nav-links a:after {    
        display: none;
    }

    #new_header{
        position: static !important;
    }
}

.main-image{
    position: relative;
    width: 100%;
    /* max-width: 1280px; */
    margin: 0 auto;
    overflow: hidden;
    height: 850px;
    background: radial-gradient(#010520 0%, #010520 22%, #010520 44%, #010520 100%);
}

.main-image .main-image-photo{
    width: 100%;
    height: auto;
}

.main-image-text{
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translate(-50%,-50%);
    display: flex;
    flex-direction: column;
    justify-content: center
}

.main-image-text h1{
    color: #fff;
    font-size: 38px;
    margin: 0;
    letter-spacing: 5px;
    text-align: center;
}

.main-image-text h2{
    color: #fff;
    font-size: 16px;
    margin: 0;
    margin-top: 10px;
}

.main-join-link{
    display: inline-block;
    padding: 10px 90px;
    background:#ffc107;
    color: #000000;
    text-decoration: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    margin-top: 30px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    margin: 30px auto;
}

.main-join-link:hover{
    transform: scale(1.1);
    transition: all 0.3s ease;
}

.main-join-link img{
    width: 20px;
    height: 20px;
    margin-right: 5px;
}

@media (max-width: 768px) {
    .main-image{
        height: 630px;
    }

    .main-image-text{
        width: 90%;
    }
    
    .main-image-text h1{
        color: #fff;
        font-size: 23px;
        margin: 0 auto;
        letter-spacing: 2px;
        line-height: 1.4;
    }
    
    .main-image-text h2{
        color: #fff;
        font-size: 12px;
        margin: 0 auto;
        margin-top: 5px;
        text-align: center;
    }

    .main-join-link{
        padding: 10px 20px;
        font-size: 14px;
        margin: 25px auto;
        margin-bottom: 10px;
    }
 
    
    .app-image img{
        width: 100%;
        height: auto;
    }

    .app-image{
        width: 90%;
        left: 60%;
    }
}

.app-image{
    background-color: transparent;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top:50%
}

.app-image img{
    width: 80%;
    height: auto;
}

.app-image img:hover{
    transform: scale(1.1);
    transition: .3s ease;
}

@media (max-width: 768px) {
    .app-image img{
        width: 100%;
        height: auto;
    }

    .app-image{
        width: 80%;
        left: 50%;
    }
}


            /* 新闻列表容器 */
            .news-list {
                display: flex;
                flex-direction: column;
                gap: 20px;
                margin-top: 20px;
            }
            
            /* 单个新闻项 */
            .news-item {
                display: flex;
                gap: 20px;
                background: #1f1f1f;
                padding: 15px;
                border-radius: 8px;
                align-items: flex-start;
                box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
            }
            
            /* 新闻缩略图 */
            .news-thumbnail {
                width: 150px;
                height: 100px;
                object-fit: cover;
                border-radius: 4px;
            }
            
            /* 新闻内容 */
            .news-content {
                flex: 1;
            }
            
            .news-title {
                margin: 0;
                font-size: 18px;
                color: #fff;
            }
            
            .news-title a {
                text-decoration: none;
                color: #00b6ff;
            }
            
            .news-title a:hover {
                text-decoration: underline;
            }
            
            .news-date {
                margin: 5px 0;
                font-size: 14px;
                color: #aaa;
            }
            
            .news-description {
                margin: 0;
                font-size: 16px;
                color: #e0e0e0;
            }
            
            /* 响应式样式 */
            @media (max-width: 768px) {
                .news-item {
                    flex-direction: column;
                    align-items: flex-start;
                }
            
                .news-thumbnail {
                    width: 100%;
                    height: auto;
                }
            }


            .ad-container {
                display: flex;
                flex-wrap: wrap;
                max-width: 1280px;
                margin: 0 auto;
                align-items: center;
                justify-content: space-between;
                padding: 20px;
                margin-top: 100px;
            }
        
            .ad-content {
                flex: 1;
                max-width: 50%;
            }
        
            .ad-content h1 {
                font-size: 24px;
                margin-bottom: 10px;
            }
        
            .ad-content h2 {
                font-size: 18px;
                margin-bottom: 20px;
            }
        
            .ad-register-button {
                display: inline-block;
                padding: 10px 20px;
                background-color: white;
                color: black;
                text-decoration: none;
                border: 1px solid black;
                border-radius: 5px;
            }
        
            .ad-image {
                flex: 1;
                max-width: 50%;
                text-align: center;
            }
        
            .ad-image img {
                max-width: 100%;
                height: auto;
            }
        
            @media (max-width: 768px) {
                .ad-container {
                    flex-direction: column;
                }
        
                .ad-content, .ad-image {
                    max-width: 100%;
                    margin-top: 10px;
                }
                
            }



            
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
  }
  
  .news-item {
    display: flex;
    flex-direction: column;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    background-color: #fff;
  }
  
  .news-thumbnail {
    width: 100%;
    height: auto;
  }
  
  .news-content {
    padding: 15px;
  }
  
  .news-title {
    font-size: 18px;
    margin-bottom: 10px;
  }
  
  .news-title a {
    text-decoration: none;
    color: #333;
  }
  
  .news-title a:hover {
    color: #007bff;
  }
  
  .news-date {
    font-size: 14px;
    color: #888;
    margin-bottom: 10px;
  }
  
  .news-description {
    font-size: 16px;
    color: #555;
  }
  
  @media (max-width: 768px) {
    .news-grid {
        grid-template-columns: 1fr;
    }
  }

  #main-header {
    background-color: #000;
    color: #fff;
    border-bottom: 1px solid #333;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.main-header-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    max-width: 1280px;
    margin: 0 auto;
    padding: 10px 20px;
}

.main-logo img {
    max-height: 50px;
}

.main-nav {
    flex: 1;
    text-align: right;
}

.main-nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav-links li {
    margin: 0 10px;
}

.main-nav-links a {
    text-decoration: none;
    color: #fff;
    font-size: 16px;
    transition: color 0.3s;
}

.main-nav-links a:hover {
    color: #ff9900;
}

.main-menu-icon {
    display: none;
    font-size: 24px;
    cursor: pointer;
    color: #fff;
}

@media (max-width: 768px) {
    .main-nav-links {
        display: none;
        flex-direction: column;
        background-color: #000;
        position: absolute;
        top: 100%;
        right: 0;
        width: 100%;
        border-top: 1px solid #333;
    }

    .main-nav-links li {
        margin: 10px 0;
        text-align: center;
    }

    .main-menu-icon {
        display: block;
    }

    .main-nav-links.active {
        display: flex;
    }
}

.promo-banner {
    display: flex;
    flex-wrap: wrap;
    max-width: 1280px;
    margin: 80px auto 0;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    background-color: #f9f9f9;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin-top: 100px;
}

.promo-content {
    flex: 1;
    max-width: 50%;
    text-align: left;
    padding: 20px;
}

.promo-content h1 {
    font-size: 28px;
    color: #333;
    margin-bottom: 15px;
}

.promo-content h2 {
    font-size: 18px;
    color: #555;
    margin-bottom: 20px;
}

.promo-register-btn {
    display: inline-block;
    padding: 12px 25px;
    background-color: #ff9900;
    color: white;
    text-decoration: none;
    font-size: 16px;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.promo-register-btn:hover {
    background-color: #cc7a00;
}

.promo-image {
    flex: 1;
    max-width: 50%;
    text-align: center;
}

.promo-image img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
}

@media (max-width: 768px) {
    .promo-banner {
        flex-direction: column;
    }

    .promo-content,
    .promo-image {
        max-width: 100%;
    }

    .promo-content {
        text-align: center;
    }
}




        /* Header 样式 */
        #main-header {
            background-color: #000; /* 修改背景色为黑色 */
            border-bottom: 1px solid #ddd;
            padding: 10px 20px;
        }
    
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
        }
    
        .logo-area img {
            max-height: 50px;
        }
    
        .logo-area span {
            font-size: 1.5rem;
            font-weight: bold;
            color: #fff; /* 修改字体颜色为白色 */
        }
    
        .navigation {
            position: relative;
        }
    
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: #fff; /* 修改按钮颜色为白色 */
        }
    
        .nav-menu {
            display: flex;
            gap: 15px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
    
        .nav-menu li a {
            text-decoration: none;
            color: #fff; /* 修改字体颜色为白色 */
            font-size: 1rem;
            transition: color 0.3s ease;
        }
    
        .nav-menu li a:hover {
            color: #ff5722;
        }
    
        /* 移动端样式 */
        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
    
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                right: 0;
                background-color: #000; /* 修改背景色为黑色 */
                border: 1px solid #333; /* 调整边框颜色 */
                width: 200px;
                box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            }
    
            .nav-menu.active {
                display: flex;
            }
    
            .nav-menu li {
                text-align: center;
                padding: 10px 0;
            }
    
            .nav-menu li a {
                color: #fff; /* 确保字体颜色为白色 */
            }
    
            .nav-menu li a:hover {
                color: #ff5722;
            }
        }


        
    .promo-section {
        background-color: #f4f4f4;
        padding: 40px 20px;
    }

    .promo-container {
        display: grid;
        grid-template-areas: 
            "image details"
            "image details";
        grid-template-columns: 1fr 1fr;
        align-items: center;
        gap: 30px;
        max-width: 1200px;
        margin: 0 auto;
    }

    .promo-image-wrapper {
        grid-area: image;
        text-align: center;
    }

    .promo-image {
        max-width: 100%;
        height: auto;
        border-radius: 10px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }

    .promo-details {
        grid-area: details;
        text-align: left;
    }

    .promo-title {
        font-size: 2rem;
        color: #222;
        margin-bottom: 15px;
    }

    .promo-highlight {
        color: #ff5722;
        font-weight: bold;
    }

    .promo-description {
        font-size: 1.1rem;
        color: #555;
        margin-bottom: 20px;
    }

    .promo-button {
        display: inline-block;
        padding: 12px 25px;
        background-color: #ff5722;
        color: #fff;
        text-decoration: none;
        font-size: 1.2rem;
        border-radius: 5px;
        transition: background-color 0.3s ease;
        cursor: pointer;
    }

    .promo-button:hover {
        background-color: #e64a19;
    }

    @media (max-width: 768px) {
        .promo-container {
            grid-template-areas: 
                "image"
                "details";
            grid-template-columns: 1fr;
            text-align: center;
        }

        .promo-details {
            text-align: center;
        }
    }

    .ad-section {
        background-color: #f9f9f9;
        padding: 30px 15px;
        text-align: center;
    }

    .ad-container {
        max-width: 800px;
        margin: 0 auto;
    }

    /* 第一行样式 */
    .ad-header {
        margin-bottom: 20px;
    }

    .ad-title {
        font-size: 2rem;
        color: #333;
        margin-bottom: 10px;
    }

    .ad-subtitle {
        font-size: 1.2rem;
        color: #666;
    }

    /* 第二行样式 */
    .ad-reward {
        margin-bottom: 20px;
    }

    .reward-text {
        font-size: 1.5rem;
        color: #222;
    }

    .reward-highlight {
        color: #ff5722;
        font-weight: bold;
    }

    /* 第三行样式 */
    .ad-actions {
        margin-top: 20px;
    }

    .ad-download-btn {
        display: inline-block;
        padding: 15px 30px;
        background-color: #ff5722;
        color: #fff;
        text-decoration: none;
        font-size: 1.2rem;
        border-radius: 5px;
        transition: background-color 0.3s ease;
    }

    .ad-download-btn:hover {
        background-color: #e64a19;
    }

    /* 响应式设计 */
    @media (max-width: 768px) {
        .ad-title {
            font-size: 1.8rem;
        }

        .reward-text {
            font-size: 1.3rem;
        }

        .ad-download-btn {
            font-size: 1rem;
            padding: 12px 25px;
        }
    }


           /* Header 样式 */
           #site-header {
            background-color: #000;
            color: #fff;
            padding: 15px 20px;
        }
    
        .site-header-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
        }
    
        .site-logo a {
            text-decoration: none;
            color: #fff;
            font-size: 1.5rem;
            font-weight: bold;
        }
    
        .site-logo img {
            max-height: 50px;
        }
    
        .site-nav {
            position: relative;
        }
    
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1rem;
            cursor: pointer;
        }
    
        .nav-menu-wrapper {
            display: flex;
        }
    
        .nav-list {
            display: flex;
            gap: 20px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
    
        .nav-item a {
            text-decoration: none;
            color: #fff;
            font-size: 1rem;
            transition: color 0.3s ease;
        }
    
        .nav-item a:hover {
            color: #ff5722;
        }
    
        /* 移动端样式 */
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
    
            .nav-menu-wrapper {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                right: 0;
                background-color: #000;
                width: 100%;
                padding: 10px 0;
                width: 120px;
            }
    
            .nav-menu-wrapper.active {
                display: flex;
            }
    
            .nav-list {
                flex-direction: column;
                gap: 10px;
            }
    
            .nav-item {
                text-align: center;
            }
        }


        .promo-banner {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 20px;
            background: linear-gradient(135deg, #4caf50, #81c784);
            color: #fff;
            text-align: center;
        }
    
        .promo-content {
            max-width: 800px;
            width: 100%;
        }
    
        .promo-text {
            margin-bottom: 20px;
        }
    
        .promo-highlight {
            font-size: 1.5rem;
            font-weight: bold;
            margin-bottom: 10px;
        }
    
        .promo-description {
            font-size: 1rem;
            margin-bottom: 10px;
        }
    
        .promo-bonus {
            font-size: 1.2rem;
            font-weight: bold;
        }
    
        .promo-reward {
            color: #ffd700;
        }
    
        .promo-actions {
            margin-top: 20px;
        }
    
        .promo-btn {
            display: inline-block;
            padding: 10px 20px;
            font-size: 1rem;
            font-weight: bold;
            color: #fff;
            background-color: #ff5722;
            border: none;
            border-radius: 5px;
            text-decoration: none;
            transition: background-color 0.3s ease;
        }
    
        .promo-btn:hover {
            background-color: #e64a19;
        }
    
        @media (max-width: 768px) {
            .promo-highlight {
                font-size: 1.2rem;
            }
    
            .promo-description {
                font-size: 0.9rem;
            }
    
            .promo-bonus {
                font-size: 1rem;
            }
    
            .promo-btn {
                font-size: 0.9rem;
                padding: 8px 16px;
            }
        }


        
    .exchange-intro {
        background: #f9f9f9;
        padding: 40px 20px;
    }
    .intro-container {
        max-width: 1200px;
        margin: 0 auto;
        text-align: center;
    }
    .intro-title {
        font-size: 2rem;
        font-weight: bold;
        margin-bottom: 20px;
        color: #000;
    }
    .intro-description {
        font-size: 1.2rem;
        color: #000;
        margin-bottom: 40px;
    }
    .features {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-around;
    }
    .feature-item {
        flex: 1 1 calc(50% - 20px);
        max-width: calc(50% - 20px);
        margin: 10px;
        background: #fff;
        padding: 20px;
        border-radius: 8px;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    }
    .feature-item h2 {
        font-size: 1.5rem;
        margin-bottom: 10px;
        color:#000;
    }
    .feature-item p {
        font-size: 1rem;
        color: #000;
    }
    @media (max-width: 768px) {
        .feature-item {
            flex: 1 1 100%;
            max-width: 100%;
        }
    }
    .ad-section {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: center;
        padding: 20px;
        background-color: #f9f9f9;
    }

    .ad-container {
        display: flex;
        flex-direction: row;
        max-width: 1200px;
        width: 100%;
        align-items: center;
        justify-content: space-between;
    }

    .ad-text {
        flex: 1;
        padding: 20px;
    }

    .ad-slogan {
        font-size: 1.5rem;
        font-weight: bold;
        color: #333;
        margin-bottom: 10px;
    }

    .ad-detail {
        font-size: 1rem;
        color: #666;
        margin-bottom: 15px;
    }

    .ad-offer {
        font-size: 1.2rem;
        color: #ff5722;
        margin-bottom: 20px;
    }

    .ad-reward {
        font-weight: bold;
    }

    .ad-download-btn {
        display: inline-block;
        padding: 10px 20px;
        font-size: 1rem;
        color: #fff;
        background-color: #007bff;
        text-decoration: none;
        border-radius: 5px;
        transition: background-color 0.3s ease;
        cursor:pointer
    }

    .ad-download-btn:hover {
        background-color: #0056b3;
    }

    .ad-image {
        flex: 1;
        text-align: center;
    }

    .ad-image img {
        max-width: 100%;
        height: auto;
        border-radius: 10px;
    }

    @media (max-width: 768px) {
        .ad-container {
            flex-direction: column;
        }

        .ad-text {
            text-align: center;
        }

        .ad-download-btn {
            margin-top: 10px;
        }
    }


       /* 自适应样式 */
       .exchange-intro {
        padding: 20px;
        background-color: #f9f9f9;
        text-align: center;
    }
    
    .intro-container {
        max-width: 1200px;
        margin: 0 auto;
    }
    
    .intro-title {
        font-size: 2rem;
        margin-bottom: 10px;
        color: #333;
    }
    
    .intro-description {
        font-size: 1.2rem;
        margin-bottom: 20px;
        color: #666;
    }
    
    .features {
        display: flex;
        justify-content: space-between;
        gap: 20px;
        flex-wrap: nowrap; /* 强制一行展示 */
        overflow-x: hidden; /* 禁止横向滚动 */
    }
    
    .feature-item {
        flex: 1 1 0; /* 每个项目均分宽度 */
        max-width: 23%; /* 确保每个项目宽度适配容器 */
        background: #fff;
        padding: 15px;
        border-radius: 8px;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        text-align: left;
    }
    
    .feature-item h2 {
        font-size: 1.5rem;
        margin-bottom: 10px;
        color: #222;
    }
    
    .feature-item p {
        font-size: 1rem;
        color: #555;
    }
    
    /* 移动端优化 */
    @media (max-width: 768px) {
        .features {
            flex-wrap: wrap; /* 移动端允许换行 */
        }
    
        .feature-item {
            flex: 1 1 100%; /* 每个项目占满一行 */
            max-width: 100%; /* 移动端宽度为100% */
        }
    }



    /* 通用样式 */
body {
    margin: 0;
    font-family: Arial, sans-serif;
}

.main-header {
    background-color: #333;
    color: #fff;
    width: 100%;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo img {
    height: 40px;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: bold;
    color: #fff;
    text-decoration: none;
}

.navigation {
    position: relative;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}

.menu-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 20px;
}

.menu-list li {
    display: inline-block;
}

.menu-list a {
    text-decoration: none;
    color: #fff;
    padding: 10px 15px;
    transition: background-color 0.3s;
}

.menu-list a:hover {
    background-color: #555;
    border-radius: 5px;
}

/* 移动端样式 */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .menu-list {
        display: none;
        flex-direction: column;
        background-color: #333;
        position: absolute;
        top: 100%;
        right: 0;
        width: 200px;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }

    .menu-list.active {
        display: flex;
    }

    .menu-list li {
        text-align: center;
    }
}

.promo-section {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background-color: #121212;
}

.promo-container {
    display: flex;
    flex-direction: row;
    max-width: 1200px;
    width: 100%;
    /* border: 1px solid #ddd;
    border-radius: 8px; */
    overflow: hidden;
    background-color: #121212;
}

.promo-image {
    flex: 1;
    min-width: 300px;
}

.promo-image img {
    width: 100%;
    height: auto;
    display: block;
}

.promo-content {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.promo-text {
    margin-bottom: 20px;
}

.promo-highlight {
    font-size: 1.2rem;
    font-weight: bold;
    color: #fff;
    margin-bottom: 10px;
}

.promo-description {
    font-size: 1rem;
    color: #fff;
    margin-bottom: 10px;
}

.promo-reward {
    font-size: 1rem;
    color: #fff;
}

.promo-bonus {
    font-weight: bold;
    color: #e74c3c;
}

.promo-download-btn {
    padding: 10px 20px;
    font-size: 1rem;
    color: #fff;
    background-color: #007bff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.promo-download-btn:hover {
    background-color: #0056b3;
}

/* Responsive Design */
@media (max-width: 768px) {
    .promo-container {
        flex-direction: column;
    }

    .promo-image {
        min-width: 100%;
    }

    .promo-content {
        text-align: center;
    }
}