/* ========== 左侧导航样式 ========== */
.sidebar {
    width: 280px;
    background: #2c3e50;
    color: white;
    padding: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    position: sticky;
    top: 0;
}

.sidebar-header {
    padding: 10px 20px 20px;
    border-bottom: 1px solid #34495e;
}

.sidebar-title {
    font-size: 20px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

/* 搜索框样式 */
.search-box {
    display: flex;
    align-items: center;
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 25px;
    padding: 8px 15px;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.search-box:focus-within {
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    color: #2c3e50;
    font-size: 14px;
    padding: 5px 0;
}

.search-input::placeholder {
    color: #95a5a6;
}

.search-btn {
    background: none;
    border: none;
    color: #7f8c8d;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-btn:hover {
    background: rgba(52, 152, 219, 0.1);
    color: #3498db;
}

/* 下载分类列表样式 */
.category-list {
    list-style: none;
    padding: 20px 0;
    margin: 0;
    flex: 1;
    overflow-y: auto;
}

.category-item {
    margin-bottom: 2px;
}

.category-link {
    display: flex;
    align-items: center;
    padding: 15px 30px;
    color: #ecf0f1;
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
}

.category-link:hover {
    background: #34495e;
    border-left-color: #3498db;
}

.category-item.active .category-link {
    background: #3498db;
    border-left-color: #2980b9;
}

/* 电商平台下载分类特殊样式 */
.category-item.active .category-link[data-section="ecommerce"] {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-left-color: #667eea;
}

.category-link[data-section="ecommerce"]:hover {
    background: rgba(102, 126, 234, 0.1);
    border-left-color: #667eea;
}

.category-link i {
    width: 20px;
    text-align: center;
    margin-right: 12px;
    font-size: 16px; /* 图标大小 */
}

.category-text {
    flex: 1;
    font-size: 16px; /* 一级分类字体大小 */
}

/* 左侧导航响应式样式 */
@media (min-width: 769px) {
    .sidebar {
        position: relative;
        width: 280px;
        background: #2c3e50;
        min-height: 100vh;
        transform: translateX(0) !important;
    }
}

@media (max-width: 768px) {
    .sidebar {
        display: none !important;
        width: 0 !important;
        height: 0 !important;
        overflow: hidden !important;
    }
}