/* 专栏卡片组件 */
.columns-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

/* 响应式布局 */
@media (max-width: 768px) {
    .columns-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .columns-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (min-width: 1025px) {
    .columns-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: 30px;
    }
}

.column-card {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 350px;
}

.column-header {
    height: 200px;
    background: linear-gradient(135deg, #3b82f6 0%, #0ea5e9 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    font-weight: bold;
    position: relative;
}

.column-tag {
    position: absolute;
    top: 15px;
    right: 15px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border: 1px solid rgba(255,255,255,0.1);
}

.column-content {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.column-title {
    font-size: 20px;
    font-weight: bold;
    color: #212529;
    margin-bottom: 12px;
}

.column-desc {
    color: #6c757d;
    margin-bottom: 20px;
    line-height: 1.6;
    flex: 1;
}

.column-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: #6c757d;
    margin-bottom: 15px;
}

.column-meta div {
    display: flex;
    gap: 15px;
}

.column-meta span {
    white-space: nowrap;
}

/* 文档列表组件 */
.doc-list-item {
    display: flex;
    gap: 20px;
    cursor: pointer;
    margin-bottom: 20px;
}

.doc-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    flex-shrink: 0;
}

.doc-info {
    flex: 1;
}

.doc-title {
    font-size: 18px;
    font-weight: bold;
    color: #212529;
    margin-bottom: 8px;
}

.doc-desc {
    color: #6c757d;
    margin-bottom: 12px;
}

.doc-meta {
    display: flex;
    gap: 20px;
    font-size: 14px;
    color: #6c757d;
}

/* 章节学习进度组件 */
.chapter-item {
    margin-bottom: 12px;
    border-radius: 8px;
    transition: all 0.2s;
}

.chapter-item:hover {
    background: #f8f9fa;
}

.chapter-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    text-decoration: none;
    color: inherit;
    border-radius: 8px;
    border: 1px solid #dee2e6;
}

.chapter-info {
    flex: 1;
    margin-right: 15px;
}

.chapter-title {
    font-weight: 500;
    color: #495057;
    display: block;
    margin-bottom: 8px;
}

.chapter-progress-bar {
    width: 100%;
    height: 4px;
    background: #e9ecef;
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #28a745 0%, #20c997 100%);
    transition: width 0.3s ease;
}

.chapter-status-container {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
}

.chapter-status {
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
}

.chapter-progress {
    font-size: 11px;
    color: #6c757d;
    font-weight: 500;
}

/* 岗位卡片组件 */
.job-card {
    border-left: 4px solid #3b82f6;
    margin-bottom: 20px;
}

.job-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.job-title {
    font-size: 20px;
    font-weight: bold;
    color: #212529;
    margin-bottom: 8px;
}

.job-company {
    color: #3b82f6;
    font-weight: 500;
}

.job-salary {
    font-size: 18px;
    font-weight: bold;
    color: #28a745;
}

.job-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 15px;
}

.job-tag {
    background: #f8f9fa;
    color: #495057;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
}

.job-desc {
    color: #6c757d;
    margin-bottom: 15px;
    line-height: 1.6;
}

.job-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: #6c757d;
}