* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
    color: #eee;
}

.header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: #f0f0f0;
    opacity: 0;
    transform: translateY(-30px);
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

.subtitle {
    font-size: 1.1rem;
    color: #ccc;
    opacity: 0;
    transform: translateY(-20px);
    animation: fadeInUp 0.8s ease 0.4s forwards;
}

.museum-container {
    width: 90%;
    max-width: 1200px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

.main-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.software-card {
    background: #2a2a2a;
    border-radius: 15px;
    padding: 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    border: 1px solid #444;
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.software-card.active {
    opacity: 1;
    transform: translateY(0);
}

.card-header {
    background: linear-gradient(135deg, #333, #444);
    color: #f0f0f0;
    padding: 25px;
    text-align: center;
    border-bottom: 1px solid #555;
}

.card-header h2 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.card-header .version {
    font-size: 1rem;
    color: #bbb;
}

.card-body {
    padding: 30px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: center;
}

.software-image {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease;
    border: 1px solid #555;
}

.software-image:hover {
    transform: scale(1.02);
}

.software-image-wrap {
    position: relative;
}

.software-image-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    aspect-ratio: 16 / 10;
    min-height: 240px;
    background: #333;
    border: 1px dashed #666;
    border-radius: 8px;
    color: #999;
    font-size: 1rem;
    text-align: center;
    padding: 20px;
}

.software-image-placeholder[hidden] {
    display: none;
}

.software-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.description h4 {
    color: #f0f0f0;
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.description p {
    color: #ddd;
    line-height: 1.6;
}

.features {
    background: #333;
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid #ddd;
}

.features h4 {
    color: #f0f0f0;
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.features ul {
    list-style-type: none;
}

.features li {
    padding: 8px 0;
    position: relative;
    padding-left: 20px;
    color: #ddd;
    line-height: 1.5;
}

.features li:before {
    content: "•";
    color: #f0f0f0;
    font-weight: bold;
    font-size: 1.2rem;
    position: absolute;
    left: 0;
}

.navigation-hint {
    text-align: center;
    margin-top: 20px;
    color: #999;
    font-size: 0.9rem;
    font-style: italic;
}

.wheel-indicator {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    backdrop-filter: blur(5px);
}

.wheel-indicator.show {
    opacity: 1;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 968px) {
    .card-body {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    h1 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    body {
        padding: 20px 15px;
    }
    
    .card-body {
        padding: 20px;
    }
    
    .wheel-indicator {
        bottom: 10px;
        right: 10px;
        font-size: 0.85rem;
        padding: 8px 12px;
    }
}