/* 文档资料页样式（Tab版） */
.page-nav {
    background: var(--primary);
    border-bottom: none;
    padding: 0;
    position: sticky;
    top: 72px;
    z-index: 100;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.page-nav-inner {
    display: flex;
    align-items: center;
    gap: 32px;
    padding: 16px 0;
}

.page-title {
    font-size: 20px;
    font-weight: 600;
    color: white;
    white-space: nowrap;
    flex-shrink: 0;
}

/* Tab导航 */
.docs-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    scrollbar-width: none;
}

.docs-tabs::-webkit-scrollbar {
    display: none;
}

.doc-tab {
    padding: 10px 20px;
    border: none;
    border-radius: 30px;
    background: rgba(255, 255, 255, 0.2);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: white;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.doc-tab:hover {
    background: white;
    color: var(--primary);
}

.doc-tab.active {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 12px rgba(255, 153, 85, 0.4);
}

/* 内容区 */
.docs-content {
    background: white;
    border-radius: 16px;
    padding: 40px;
    margin-top: 24px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.doc-panel {
    display: none;
}

.doc-panel.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.doc-panel h2 {
    font-size: 28px;
    margin-bottom: 32px;
    color: var(--text-primary);
}

/* 文档块 */
.doc-block {
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border);
}

.doc-block:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.doc-block h3 {
    font-size: 20px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.doc-block > p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

/* 流程步骤 */
.process-steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.process-steps .step {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px;
    background: var(--bg-light);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.process-steps .step:hover {
    background: var(--primary-light);
    transform: translateX(8px);
}

.process-steps .step-num {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.process-steps .step-info h4 {
    font-size: 16px;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.process-steps .step-info p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 检查列表 */
.check-list {
    list-style: none;
}

.check-list li {
    padding: 12px 0;
    padding-left: 28px;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.6;
    border-bottom: 1px solid var(--border);
}

.check-list li:last-child {
    border-bottom: none;
}

.check-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 600;
}

/* 工具网格 */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.tool-item {
    padding: 24px;
    background: var(--bg-light);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.tool-item:hover {
    background: white;
    box-shadow: var(--shadow-md);
}

.tool-item strong {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.tool-item p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 指南步骤 */
.guide-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.guide-step {
    text-align: center;
    padding: 24px 16px;
    background: var(--bg-light);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.guide-step:hover {
    background: white;
    box-shadow: var(--shadow-md);
}

.guide-icon {
    width: 56px;
    height: 56px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 600;
    margin: 0 auto 16px;
}

.guide-step h4 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.guide-step p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* 下载区 */
.downloads-desc {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.downloads-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.download-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.download-card:hover {
    background: white;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.download-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.download-icon.pdf {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
}

.download-icon.img {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.download-icon svg {
    width: 26px;
    height: 26px;
    fill: white;
}

.download-info {
    flex: 1;
}

.download-info h4 {
    font-size: 15px;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.download-info p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.file-size {
    font-size: 12px;
    color: var(--text-muted);
}

.download-actions {
    display: flex;
    gap: 8px;
}

.btn-preview {
    padding: 8px 14px;
    background: rgba(0, 136, 0, 0.1);
    color: var(--primary);
    border-radius: 8px;
    font-size: 13px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-preview:hover {
    background: rgba(0, 136, 0, 0.2);
}

.btn-download {
    padding: 8px 14px;
    background: var(--primary);
    color: white;
    border-radius: 8px;
    font-size: 13px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-download:hover {
    background: var(--primary-dark);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .page-nav {
        position: fixed;
        top: 50px;
        left: 0;
        right: 0;
        z-index: 999;
        transform: translateY(-100%);
        opacity: 0;
        transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.35s ease;
    }
    
    .page-nav.visible {
        transform: translateY(0);
        opacity: 1;
    }
    
    .page-nav-inner {
        flex-direction: row;
        align-items: center;
        gap: 12px;
        padding: 8px 16px;
    }
    
    .page-title {
        font-size: 14px;
        font-weight: 600;
        flex-shrink: 0;
        width: auto;
    }
    
    .docs-tabs {
        width: 100%;
    }
    
    .doc-tab {
        padding: 8px 16px;
        font-size: 13px;
        flex-shrink: 0;
    }
    
    .docs-content {
        padding: 24px;
        margin-top: 30px;
    }
    
    .tools-grid,
    .guide-steps {
        grid-template-columns: 1fr;
    }
    
    .downloads-grid {
        grid-template-columns: 1fr;
    }
}