:root {
    --primary-color: #c62828;
    --secondary-color: #f5deb3;
    --dark-color: #2d2d2d;
    --light-color: #f8f9fa;
    --accent-color: #ff9800;
}

* { 
    font-family: 'Noto Sans SC', sans-serif; 
}

body {
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.top-announcement {
    background-color: var(--primary-color);
    color: white;
    padding: 8px 0;
    font-size: 14px;
}

.navbar {
    background-color: var(--dark-color) !important;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 24px;
    color: var(--secondary-color) !important;
}

.nav-link {
    color: rgba(255,255,255,0.85) !important;
    font-weight: 500;
    transition: all 0.3s;
    margin: 0 5px;
}

.nav-link:hover, 
.nav-link.active {
    color: var(--accent-color) !important;
}

.page-header {
    background: linear-gradient(rgba(45, 45, 45, 0.85), rgba(45, 45, 45, 0.9)),
                url('https://images.unsplash.com/photo-1511512578047-dfb367046420?ixlib=rb-4.0.3&auto=format&fit=crop&w=1471&q=80');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 40px 0;
    margin-bottom: 30px;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 20px;
    opacity: 0.9;
}

.search-box { 
    max-width: 600px; 
    margin: 0 auto; 
}

.search-input { 
    border-radius: 50px 0 0 50px; 
    border: none; 
    padding: 15px 25px; 
    font-size: 16px; 
}

.search-btn { 
    border-radius: 0 50px 50px 0; 
    background-color: var(--accent-color); 
    border: none; 
    padding: 15px 25px; 
    font-weight: 600; 
}

.category-section {
    background-color: white;
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.version-badge {
    background-color: var(--accent-color);
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: inline-block;
    margin-right: 8px;
    margin-bottom: 8px;
    text-decoration: none;
}

.list-thumb {
    width: 60px;
    height: 60px;
    object-fit: cover;
}

.version-desc {
    color: #444;
    font-size: 0.925rem;
    line-height: 1.65;
}

.download-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 600;
    transition: background-color 0.3s;
}

.download-btn:hover {
    background-color: #a51c1c;
    color: white;
}

.footer {
    background-color: var(--dark-color);
    color: rgba(255,255,255,0.8);
    padding: 30px 0;
    margin-top: 50px;
}

.copyright {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
}

.seo-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 768px) {
    .page-title { 
        font-size: 1.5rem; 
    }
    .page-header { 
        padding: 30px 0; 
    }
}