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

body {
    font-family: Arial, sans-serif, "微软雅黑";
    background-color: #f1f6f6;
    color: #252628;
    font-size: 14px;
    line-height: 1.4;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 40px;
}

.main-title {
    font-size: 32px;
    color: #be8c50;
    margin-bottom: 10px;
    font-weight: normal;
}

.subtitle {
    font-size: 16px;
    color: #666;
    margin-bottom: 30px;
}

.main-nav {
    display: flex;
    justify-content: center;
    gap: 60px;
    border-bottom: 1px solid #ddd;
    padding-bottom: 15px;
}

.nav-item {
    text-decoration: none;
    color: #be8c50;
    font-size: 18px;
    font-weight: bold;
    padding: 8px 0;
    position: relative;
}

.nav-item.active {
    color: #cd623a;
}

.nav-item:hover {
    color: #cd623a;
}

/* 主要内容区域 */
.main-content {
    display: flex;
    gap: 30px;
    align-items: flex-start;
}

/* 左侧边栏 */
.sidebar {
    width: 23.3%;
    flex-shrink: 0;
}

.category-menu {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.category-item {
    padding: 8px 12px;
    border-bottom: 1px solid #eee;
    cursor: pointer;
    font-size: 14px;
    color: #333;
    transition: background-color 0.2s;
}

.category-item:last-child {
    border-bottom: none;
}

.category-item:hover {
    background-color: #f5f5f5;
}

.category-item.active {
    background-color: #f0f0f0;
    color: #cd623a;
    font-weight: bold;
}

/* 右侧内容区域 */
.content-area {
    flex: 1;
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 20px;
    min-height: 600px;
}

.software-group {
    display: none;
}

.software-group.active {
    display: block;
}

.software-item {
    display: flex;
    align-items: center;
    padding: 6px 0;
    border-bottom: 1px solid #f0f0f0;
}

.software-item:last-child {
    border-bottom: none;
}

.software-icon {
    color: #cd623a;
    font-size: 14px;
    margin-right: 8px;
    font-weight: bold;
}

.software-link {
    color: #cd623a;
    text-decoration: none;
    font-size: 14px;
    flex: 1;
}

.software-link:hover {
    text-decoration: underline;
    color: #be8c50;
}

/* 页脚 */
.footer {
    margin-top: 40px;
    text-align: center;
    font-size: 12px;
    color: #999;
    line-height: 1.6;
}

.disclaimer {
    margin-bottom: 8px;
}

.copyright {
    margin-top: 10px;
    color: #777;
}