/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --dark-color: #1f2937;
    --light-bg: #f9fafb;
    --border-color: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --yone-color: #ff6b6b;
    --yone-bg: #ffe5e5;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f8f9fa;
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

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

/* 头部样式 */
.header {
    background: white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #e5e7eb;
}

.header-content {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo i {
    font-size: 2rem;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 1.5rem;
    color: var(--text-primary);
    font-weight: 700;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}

/* 公告栏 */
.announcement {
    background: white;
    padding: 1rem 0;
    margin-bottom: 2rem;
    border-left: 3px solid #fbbf24;
}

.announcement-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: #1f2937;
    font-weight: 500;
    font-size: 0.95rem;
}

.announcement-content i {
    font-size: 1.25rem;
    color: #fbbf24;
    flex-shrink: 0;
}

/* 快捷链接 */
.quick-links {
    padding: 1.5rem 0;
    margin-bottom: 1.5rem;
}

.quick-links-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.quick-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    cursor: pointer;
}

.quick-link-btn i {
    font-size: 1rem;
    color: var(--primary-color);
}

.quick-link-btn:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

/* 分类筛选 */
.categories {
    background: transparent;
    padding: 2rem 0;
    margin: 0 auto 2rem;
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.category-btn {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 0.875rem 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.category-btn i {
    font-size: 1.25rem;
    transition: all 0.2s;
}

.category-btn:hover {
    border-color: #d1d5db;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.category-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.category-btn.active i {
    color: white;
}

/* Yone辅助文件专区 */
.yone-highlight-section {
    background: white;
    border: 2px solid #fecaca;
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 16px rgba(239, 68, 68, 0.1);
    position: relative;
}

.yone-header {
    margin-bottom: 1.5rem;
}

.yone-title {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.yone-title i {
    color: var(--yone-color);
    font-size: 1.75rem;
    animation: rotate 3s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.yone-title h3 {
    color: var(--yone-color);
    font-size: 1.5rem;
    font-weight: 700;
}

.yone-badge {
    background: var(--yone-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.yone-desc {
    color: #c92a2a;
    font-weight: 500;
    margin-left: 3rem;
}

/* 文件列表 */
.files-section {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    margin: 1.5rem auto;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    min-height: 400px;
}

.files-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.search-box {
    position: relative;
    width: 300px;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.95rem;
    transition: all 0.2s;
    background: white;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.files-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.file-card {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.2s;
    cursor: pointer;
    position: relative;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.file-card:hover {
    border-color: #d1d5db;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}

.file-card.yone-file {
    background: #fef2f2;
    border-color: #fecaca;
}

.file-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    margin-bottom: 1rem;
    transition: all 0.2s;
}

.file-card:hover .file-icon {
    transform: translateY(-2px);
}

.file-card.yone-file .file-icon {
    background: #ef4444;
}

.file-header {
    margin-bottom: 1rem;
}

.file-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    word-break: break-word;
}

.file-meta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}

.file-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.file-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.file-actions {
    display: flex;
    gap: 0.75rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    flex: 1;
    justify-content: center;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.2);
}

.btn-primary:hover {
    background: var(--secondary-color);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--light-bg);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--border-color);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.95) 100%);
    margin-top: 4rem;
    padding: 2.5rem 0;
    text-align: center;
    color: var(--text-secondary);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(99, 102, 241, 0.1);
}

.footer-links {
    margin-top: 1rem;
}

.footer-links a {
    color: var(--primary-color);
    text-decoration: none;
    margin: 0 1rem;
    transition: all 0.3s;
    font-weight: 500;
}

.footer-links a:hover {
    color: var(--secondary-color);
    transform: translateY(-2px);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: 16px;
    max-width: 600px;
    position: relative;
    animation: slideDown 0.3s;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close {
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: var(--danger-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .files-header {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        width: 100%;
    }

    .files-grid {
        grid-template-columns: 1fr;
    }

    .category-filters {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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


/* 更新说明支持换行 */
.file-description {
  white-space: pre-line;
}