#iframeContainer {
    width: 1200px;
    margin: 0 auto;
    overflow-x: auto;
    direction: rtl;
    scrollbar-width: thin;
    -webkit-scrollbar-width: thin;
    padding: 0;
}

#iframeWrap {
    direction: ltr;
    display: inline-block;
}
.index-course {height:410px;}

:root {
    --primary-color: #c7a153;
    --secondary-color: #1a1a1a;
    --text-color: #fff;
    --hover-color: #e6c678;
    --card-bg: rgba(50, 50, 50, 0.8);
}

body {
    background-color: var(--secondary-color);
    color: var(--text-color);
    font-family: "Microsoft YaHei", sans-serif;
    line-height: 1.8;
    padding-top: 80px;
}

.navbar {
    background-color: rgba(26, 26, 26, 0.98) !important;
    border-bottom: 3px solid var(--primary-color);
    box-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.navbar-brand {
    color: var(--primary-color) !important;
    font-weight: bold;
    font-size: 1.8rem;
}

.nav-link {
    color: var(--text-color) !important;
    font-size: 1.1rem;
    margin: 0 8px;
    position: relative;
    padding-bottom: 5px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--hover-color);
    transition: width 0.3s;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.sidebar {
    position: sticky;
    top: 100px;
    background-color: rgba(30, 30, 30, 0.9);
    border-radius: 8px;
    border: 1px solid var(--primary-color);
    padding: 20px;
    height: fit-content;
}

.sidebar-title {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--primary-color);
}

.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-menu li {
    margin-bottom: 10px;
}

.sidebar-menu a {
    color: var(--text-color);
    text-decoration: none;
    display: block;
    padding: 8px 10px;
    border-radius: 4px;
    transition: all 0.2s;
}

.sidebar-menu a:hover {
    background-color: rgba(199, 161, 83, 0.2);
    color: var(--hover-color);
    padding-left: 15px;
}

.sidebar-menu a.active {
    background-color: rgba(199, 161, 83, 0.3);
    color: var(--primary-color);
    font-weight: bold;
}

.hero-banner {
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), 
                url("../images/banner.jpg") center/cover no-repeat;
    height: 450px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin-bottom: 50px;
    border-radius: 8px;
}

.hero-title {
    font-size: 3.2rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px #000;
}

.quick-search {
    background-color: rgba(30, 30, 30, 0.95);
    padding: 25px;
    border-radius: 8px;
    border: 1px solid var(--primary-color);
    margin-bottom: 40px;
}

.search-input {
    height: 50px;
    border: 2px solid var(--primary-color);
    background-color: rgba(20, 20, 20, 0.8);
    color: var(--text-color);
    padding: 0 20px;
}

.search-input:focus {
    background-color: rgba(20, 20, 20, 0.9);
    color: var(--text-color);
    box-shadow: 0 0 0 0.2rem rgba(199, 161, 83, 0.25);
    border-color: var(--hover-color);
}

.search-btn {
    height: 50px;
    background-color: var(--primary-color);
    color: #000;
    font-weight: bold;
    border: none;
    padding: 0 30px;
    transition: all 0.3s;
}

.search-btn:hover {
    background-color: var(--hover-color);
    transform: scale(1.02);
}

.content-section {
    margin-bottom: 50px;
    padding: 30px;
    background-color: rgba(40, 40, 40, 0.8);
    border-radius: 10px;
    border-left: 5px solid var(--primary-color);
}

.section-title {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--primary-color);
}

.version-card {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    transition: all 0.3s;
    height: 100%;
    border: 1px solid transparent;
}

.version-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
}

.version-card h4 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

.tag {
    display: inline-block;
    background-color: rgba(199, 161, 83, 0.2);
    color: var(--primary-color);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin: 0 5px 8px 0;
    border: 1px solid var(--primary-color);
}

.filter-btn {
    background-color: var(--primary-color);
    color: #000;
    border: none;
    padding: 8px 20px;
    border-radius: 5px;
    margin: 5px;
    transition: all 0.3s;
}

.filter-btn:hover {
    background-color: var(--hover-color);
    transform: scale(1.05);
}

@media (max-width: 992px) {
    .sidebar {
        margin-bottom: 30px;
        position: static;
    }
    .hero-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    .section-title {
        font-size: 1.5rem;
    }
    .nav-link {
        margin: 5px 0;
    }
}