/* 基础样式 */
body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: #f8f9fa;
    color: #333;
    max-width: 1000px;
    margin: 0 auto;
}
 
header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px 0;
}
 
h1 {
    color: #2c3e50;
    margin-bottom: 5px;
}
 
/* 分类导航 */
.category-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
    justify-content: center;
}
 
.category-btn {
    padding: 8px 15px;
    background-color: #e0e0e0;
    color: #333;
    text-decoration: none;
    border-radius: 20px;
    transition: all 0.3s;
    font-size: 14px;
}
 
.category-btn:hover, .category-btn.active  {
    background-color: #3498db;
    color: white;
}
 
/* 软件卡片 */
.software-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
 
.software-card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: all 0.3s;
}
 
.software-header {
    padding: 15px 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
 
.software-header:hover {
    background-color: #f5f5f5;
}
 
.software-name {
    font-weight: bold;
    font-size: 16px;
    margin: 0;
}
 
.software-category {
    font-size: 12px;
    color: #7f8c8d;
    background-color: #f0f0f0;
    padding: 3px 8px;
    border-radius: 10px;
}
 
.software-content {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}
 
.software-card.active  .software-content {
    padding: 0 20px 15px;
    max-height: 300px;
}
 
/* 展开后的内容样式 */
.download-section {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #eee;
}
 
.link-row, .invite-row {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}
 
.link-label, .invite-label {
    width: 80px;
    font-size: 14px;
    color: #7f8c8d;
}
 
.link-value, .invite-value {
    flex: 1;
    padding: 6px 10px;
    background-color: #f8f9fa;
    border-radius: 4px;
    font-size: 14px;
    word-break: break-all;
}
 
.copy-btn {
    margin-left: 10px;
    padding: 6px 12px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    transition: background-color 0.3s;
}
 
.copy-btn:hover {
    background-color: #2980b9;
}
 
.copy-btn.copied  {
    background-color: #27ae60;
}
 
.description {
    font-size: 14px;
    color: #555;
    margin-top: 5px;
}
 
/* 页脚 */
footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px 0;
    color: #7f8c8d;
    font-size: 13px;
}