/* Download Page Specific Styles */

/* 页面内部Banner */
.inner-banner {
    position: relative;
    width: 100%;
    height: 450px;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.inner-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../image/jishu.jpg') center/cover no-repeat;
    opacity: 0.3;
    z-index: 0;
}

.inner-banner-content {
    position: relative;
    z-index: 1;
    text-align: right !important;
    color: #fff;
    padding-right: 100px;
    padding-top: 30px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    margin-top: 40px;
}

.inner-banner-title {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    display: inline-block;
    border-bottom: 3px solid #ff0000;
    padding-bottom: 10px;
}

.inner-banner-subtitle {
    font-size: 24px;
    font-weight: 300;
    opacity: 0.95;
    margin: 0;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
}

/* Download Container */
.download-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    min-height: calc(100vh - 400px);
}

.download-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Download Item */
.download-item {
    background: #fff;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.download-item:hover {
    border-color: #0066cc;
    box-shadow: 0 4px 12px rgba(0,102,204,0.1);
    transform: translateY(-2px);
}

.download-info {
    display: flex;
    align-items: center;
    gap: 20px;
    flex: 1;
}

.file-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.file-icon i {
    font-size: 24px;
    color: #fff;
}

/* File type specific colors */
.download-item:nth-child(1) .file-icon,
.download-item:nth-child(3) .file-icon,
.download-item:nth-child(8) .file-icon {
    background: linear-gradient(135deg, #FF6B6B, #EE5A24);
}

.download-item:nth-child(2) .file-icon {
    background: linear-gradient(135deg, #4ECDC4, #44A08D);
}

.download-item:nth-child(4) .file-icon {
    background: linear-gradient(135deg, #45B7D1, #2E86AB);
}

.download-item:nth-child(5) .file-icon {
    background: linear-gradient(135deg, #96CEB4, #FFEAA7);
}

.download-item:nth-child(6) .file-icon {
    background: linear-gradient(135deg, #FDCB6E, #E17055);
}

.download-item:nth-child(7) .file-icon {
    background: linear-gradient(135deg, #6C5CE7, #A29BFE);
}

.file-details h3 {
    margin: 0 0 8px 0;
    font-size: 18px;
    font-weight: 600;
    color: #333;
    line-height: 1.3;
}

.file-details a.file-title {
    text-decoration: none;
    color: inherit;
    display: block;
    transition: color 0.2s ease;
}

.file-details a.file-title:hover {
    color: #0066cc;
}

.file-details a.file-title:hover h3 {
    color: #0066cc;
}

.file-meta {
    margin: 0 0 8px 0;
    font-size: 14px;
    color: #666;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.file-meta::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 4px;
    background: #ccc;
    border-radius: 50%;
    margin: 8px 0;
}

.file-description {
    margin: 0;
    font-size: 14px;
    color: #777;
    line-height: 1.4;
}

/* Download Action */
.download-action {
    flex-shrink: 0;
}

.download-btn {
 background: linear-gradient(135deg, #003366 0%,#667eea 100%);
    color: #fff;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    min-width: 120px;
    justify-content: center;
    text-decoration: none;
}

.download-btn:hover {
    background: linear-gradient(135deg, #667eea 0%, #003366 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.download-btn:active {
    transform: translateY(0);
}

.download-btn.downloading {
    background: #95a5a6;
    cursor: not-allowed;
}

.download-btn.downloading::before {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid #fff;
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 8px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}


/* Responsive Design */

/* Tablet (768px - 1024px) */
@media (max-width: 1024px) {
    .download-container {
        padding: 30px 20px;
    }
    
    .download-item {
        padding: 20px;
    }
    
    .file-icon {
        width: 50px;
        height: 50px;
    }
    
    .file-icon i {
        font-size: 20px;
    }
    
    .file-details h3 {
        font-size: 16px;
    }
}

/* Mobile Landscape (481px - 767px) */
@media (max-width: 767px) {
    .download-container {
        padding: 20px 15px;
    }
    
    .download-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
        padding: 20px;
    }
    
    .download-info {
        width: 100%;
    }
    
    .download-action {
        width: 100%;
    }
    
    .download-btn {
        width: 100%;
        justify-content: center;
        padding: 14px 24px;
    }
}

/* Mobile Portrait (320px - 480px) */
@media (max-width: 480px) {
    .download-container {
        padding: 15px 10px;
    }
    
    .download-item {
        padding: 16px;
    }
    
    .download-info {
        gap: 15px;
    }
    
    .file-icon {
        width: 45px;
        height: 45px;
    }
    
    .file-icon i {
        font-size: 18px;
    }
    
    .file-details h3 {
        font-size: 15px;
    }
    
    .file-meta {
        font-size: 13px;
        flex-direction: column;
        gap: 4px;
    }
    
    .file-description {
        font-size: 13px;
    }
    
}

/* Large Screens (1200px+) */
@media (min-width: 1200px) {
    .download-container {
        max-width: 1400px;
        padding: 50px 20px;
    }
    
    .download-item {
        padding: 28px;
    }
    
    .file-icon {
        width: 70px;
        height: 70px;
    }
    
    .file-icon i {
        font-size: 28px;
    }
    
    .file-details h3 {
        font-size: 20px;
    }
}

/* TV/Large Display (1600px+) */
@media (min-width: 1600px) {
    .download-container {
        max-width: 1600px;
        padding: 60px 40px;
    }
    
    .download-item {
        padding: 32px;
    }
    
    .file-details h3 {
        font-size: 22px;
    }
    
    .file-meta {
        font-size: 15px;
    }
    
    .file-description {
        font-size: 15px;
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .file-icon {
        box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    }
    
    .download-btn {
        box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .download-item {
        background: #2d3748;
        border-color: #4a5568;
        color: #e2e8f0;
    }
    
    .file-details h3 {
        color: #f7fafc;
    }
    
    .file-meta {
        color: #a0aec0;
    }
    
    .file-description {
        color: #cbd5e0;
    }
    
}

/* Print Styles */
@media print {
    .download-btn {
        display: none;
    }
    
    .download-item {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .download-item,
    .download-btn,
    .help-btn,
    .category-list a,
    .quick-link {
        transition: none;
    }
    
    .download-btn.downloading::before {
        animation: none;
    }
}

/* Pagination Styles */
.pagination {
    margin-top: 40px;
    width: 100%;
    display: flex;
    justify-content: center;
}

.pagination .nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

.pagination .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 5px 12px;
    background: #fff;
    border: 1px solid #e5e5e5;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 500;
    color: #333;
    text-decoration: none;
    transition: all 0.3s ease;
}

.pagination .page-numbers:hover {
    background: #f5f5f5;
    border-color: #ccc;
}

.pagination .page-numbers.current {
    background: #003366;
    color: #fff;
    border-color: #003366;
}

.pagination .next,
.pagination .prev {
    font-weight: 600;
}

.pagination .screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Pagination Responsive Styles */
/* Tablet (768px - 1024px) */
@media (max-width: 1024px) {
    .pagination {
        margin-top: 30px;
    }
    
    .pagination .page-numbers {
        min-width: 36px;
        height: 36px;
        padding: 4px 10px;
        font-size: 14px;
    }
}

/* Mobile Landscape (481px - 767px) */
@media (max-width: 767px) {
    .pagination {
        margin-top: 25px;
    }
    
    .pagination .page-numbers {
        min-width: 34px;
        height: 34px;
        padding: 3px 8px;
        font-size: 14px;
    }
}

/* Mobile Portrait (320px - 480px) */
@media (max-width: 480px) {
    .pagination {
        margin-top: 20px;
    }
    
    .pagination .nav-links {
        gap: 5px;
    }
    
    .pagination .page-numbers {
        min-width: 32px;
        height: 32px;
        padding: 2px 6px;
        font-size: 13px;
    }
}

/* Large Screens (1200px+) */
@media (min-width: 1200px) {
    .pagination {
        margin-top: 50px;
    }
    
    .pagination .page-numbers {
        min-width: 44px;
        height: 44px;
        padding: 6px 14px;
        font-size: 16px;
    }
}

/* Dark Mode Support for Pagination */
@media (prefers-color-scheme: dark) {
    .pagination .page-numbers {
        background: #2d3748;
        border-color: #4a5568;
        color: #e2e8f0;
    }
    
    .pagination .page-numbers:hover {
        background: #3a4556;
        border-color: #718096;
    }
    
    .pagination .page-numbers.current {
        background: #4299e1;
        border-color: #4299e1;
    }
}

/* Focus Styles for Accessibility */
.download-btn:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* Ensure a.download-btn maintains button appearance */
a.download-btn:link,
a.download-btn:visited {
    color: #fff;
    text-decoration: none;
}

a.download-btn:active {
    transform: translateY(0);
}