html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: "微软雅黑", Arial, sans-serif;
    background: #f5f6fa;
    overflow: hidden;
}
body {
    min-height: 100vh;
    position: relative;
}
.bg-image {
    position: fixed;
    left: 0; top: 0; right: 0; bottom: 0;
    z-index: 0;
    background: url('https://images.unsplash.com/photo-1506744038136-46273834b3fb?auto=format&fit=crop&w=1500&q=80') center center/cover no-repeat;
    filter: blur(4px) brightness(0.7);
}
.center-wrapper {
    min-height: 100vh;
    min-width: 100vw;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    padding: 3vh 2vw;
    box-sizing: border-box;
}
.main-container {
    display: flex;
    background: rgba(255,255,255,0.95);
    border-radius: 32px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.18);
    width: 90vw;
    height: 60vw;
    max-width: 900px;
    max-height: 600px;
    min-width: 320px;
    min-height: 400px;
    aspect-ratio: 3/2;
    box-sizing: border-box;
    padding: 0;
    overflow: hidden;
}
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 90px;
    max-width: 160px;
    margin: 24px 0 0 0;
    padding: 18px 0 18px 18px;
    box-sizing: border-box;
    overflow-y: auto;
    overflow-x: hidden;
    max-height: 100%;
}
.category {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    padding: 10px 16px;
    text-align: center;
    font-size: 0.7em;
    cursor: pointer;
    user-select: none;
    transition: box-shadow 0.2s, background 0.2s, transform 0.2s;
    font-weight: bold;
    letter-spacing: 1px;
    min-width: 90px;
    max-width: 160px;
    box-sizing: border-box;
}
.category.active, .category:hover {
    background: linear-gradient(90deg, #a1c4fd 0%, #c2e9fb 100%);
    box-shadow: 0 4px 16px rgba(33,150,243,0.13);
    color: #222;
    transform: scale(1.06);
}
.content {
    flex: 1;
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    min-width: 0;
    min-height: 0;
    height: 100%;
}
.software-group-card {
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.10);
    margin: 18px 18px 18px 12px;
    height: calc(100% - 36px);
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    box-sizing: border-box;
    padding: 24px 24px 24px 24px;
}
.software-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 14px;
    width: 100%;
    box-sizing: border-box;
    flex: 1 1 auto;
    overflow-y: auto;
    max-height: 100%;
    min-height: 0;
    align-content: start;
    padding: 6px 6px 6px 6px;
}
.software-card {
    background: #f0f6ff;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(33,150,243,0.08);
    padding: 8px 2px;
    text-align: center;
    height: 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: box-shadow 0.2s, background 0.2s, transform 0.2s;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.software-card:hover {
    background: linear-gradient(90deg, #c2e9fb 0%, #a1c4fd 100%);
    box-shadow: 0 8px 32px rgba(33,150,243,0.18);
    animation: card-bounce 0.4s;
}
@keyframes card-bounce {
    0% { transform: scale(1); }
    30% { transform: scale(1.08); }
    60% { transform: scale(0.97); }
    100% { transform: scale(1.02); }
}
.software-title {
    font-size: 0.95em;
    font-weight: bold;
    margin-bottom: 2px;
    color: #222;
}
.software-desc {
    font-size: 0.75em;
    color: #444;
}
.download-btn { display: none; }
.copyright {
    width: 100vw;
    text-align: center;
    color: #fff;
    font-size: 0.92em;
    margin: 0;
    letter-spacing: 1px;
    z-index: 10;
    position: absolute;
    left: 0;
    right: 0;
    bottom: 18px;
    pointer-events: none;
}