/* ===== 全局变量 ===== */
:root {
    --primary: #1a4b8c;
    --primary-light: #2d6bb5;
    --primary-dark: #0f3666;
    --primary-bg: #f0f5fc;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --info: #17a2b8;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --white: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

/* ===== Reset ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
}

/* ===== 背景水印 ===== */
.bg-watermark {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background-image: url('../微信图片_2026-05-07_164928_308.jpg');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0.03;
    pointer-events: none;
    z-index: 0;
}

/* ===== Header ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    height: 64px;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    border-bottom: 2px solid var(--primary);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-left .logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.system-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    white-space: nowrap;
}

.header-center {
    flex: 1;
    display: flex;
    justify-content: center;
}

.main-nav {
    display: flex;
    gap: 4px;
}

.nav-item {
    padding: 8px 20px;
    text-decoration: none;
    color: var(--gray-600);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-item:hover {
    color: var(--primary);
    background: var(--primary-bg);
}

.nav-item.active {
    color: var(--white);
    background: var(--primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.sync-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    padding: 4px 12px;
    border-radius: 20px;
}

.sync-status.online {
    color: var(--success);
    background: #e8f5e9;
}

.sync-status.offline {
    color: var(--warning);
    background: #fff8e1;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.user-info:hover {
    background: var(--gray-100);
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
}

.username {
    font-size: 14px;
    color: var(--gray-700);
}

/* ===== 主内容 ===== */
.main-content {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px 32px;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--primary-light);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: var(--white);
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary-bg);
}

.btn-danger {
    background: var(--danger);
    color: var(--white);
}

.btn-danger:hover {
    background: #c82333;
}

.btn-success {
    background: var(--success);
    color: var(--white);
}

.btn-success:hover {
    background: #218838;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-icon {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--gray-500);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-icon:hover {
    background: var(--gray-200);
    color: var(--primary);
}

/* ===== Section ===== */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.section-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-header h3 i {
    color: var(--primary);
}

.view-all {
    font-size: 13px;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
}

.view-all:hover {
    color: var(--primary-light);
}

/* ===== 文件列表 ===== */
.file-list {
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.file-item {
    display: flex;
    align-items: center;
    padding: 14px 20px;
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

.file-item:last-child {
    border-bottom: none;
}

.file-item:hover {
    background: var(--primary-bg);
}

.file-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    margin-right: 14px;
    flex-shrink: 0;
}

.file-icon.word { background: #e3f2fd; color: #1565c0; }
.file-icon.excel { background: #e8f5e9; color: #2e7d32; }
.file-icon.ppt { background: #fff3e0; color: #e65100; }
.file-icon.pdf { background: #fce4ec; color: #c62828; }
.file-icon.image { background: #f3e5f5; color: #7b1fa2; }
.file-icon.video { background: #e0f7fa; color: #00695c; }
.file-icon.text { background: #efebe9; color: #4e342e; }
.file-icon.folder { background: #fff8e1; color: #f57f17; }

.file-info {
    flex: 1;
    min-width: 0;
}

.file-name {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-800);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-meta {
    display: block;
    font-size: 12px;
    color: var(--gray-500);
    margin-top: 2px;
}

.file-status {
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 20px;
    margin-right: 12px;
    white-space: nowrap;
}

.file-status.synced {
    color: var(--success);
    background: #e8f5e9;
}

.file-status.pending {
    color: var(--warning);
    background: #fff8e1;
}

.file-status.error {
    color: var(--danger);
    background: #fce4ec;
}

.file-actions {
    display: flex;
    gap: 4px;
}

/* ===== Tag ===== */
.tag {
    display: inline-block;
    padding: 2px 8px;
    font-size: 11px;
    border-radius: 10px;
    background: var(--primary-bg);
    color: var(--primary);
    margin-right: 4px;
}

/* ===== 表格 ===== */
.table-container {
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    background: var(--gray-100);
    padding: 12px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-600);
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.data-table td {
    padding: 12px 16px;
    font-size: 14px;
    border-bottom: 1px solid var(--gray-200);
}

.data-table tr:hover {
    background: var(--primary-bg);
}

/* ===== 搜索框 ===== */
.search-box {
    position: relative;
    width: 300px;
}

.search-box input {
    width: 100%;
    padding: 8px 16px 8px 36px;
    border: 1px solid var(--gray-300);
    border-radius: 20px;
    font-size: 13px;
    outline: none;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 75, 140, 0.1);
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
}

/* ===== 面包屑 ===== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--gray-500);
    margin-bottom: 20px;
}

.breadcrumb a {
    color: var(--primary);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* ===== 状态徽章 ===== */
.badge {
    display: inline-block;
    padding: 3px 10px;
    font-size: 12px;
    border-radius: 10px;
    font-weight: 500;
}

.badge-success { background: #e8f5e9; color: #2e7d32; }
.badge-warning { background: #fff8e1; color: #f57f17; }
.badge-danger { background: #fce4ec; color: #c62828; }
.badge-info { background: #e3f2fd; color: #1565c0; }
.badge-primary { background: var(--primary-bg); color: var(--primary); }

/* ===== 模态框 ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-200);
}

.modal-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    font-size: 18px;
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-500);
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--gray-200);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--gray-200);
}

/* ===== 表单 ===== */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 14px;
    outline: none;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 75, 140, 0.1);
}

/* ===== 空状态 ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 16px;
    color: var(--gray-400);
}

.empty-state h4 {
    font-size: 16px;
    color: var(--gray-600);
    margin-bottom: 8px;
}

/* ===== 分页 ===== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 20px;
}

.pagination button {
    min-width: 32px;
    height: 32px;
    border: 1px solid var(--gray-300);
    background: var(--white);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    transition: var(--transition);
}

.pagination button.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.pagination button:hover:not(.active) {
    border-color: var(--primary);
    color: var(--primary);
}

/* ===== 侧栏布局 ===== */
.page-layout {
    display: flex;
    gap: 24px;
}

.sidebar {
    width: 260px;
    flex-shrink: 0;
}

.sidebar-menu {
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 12px;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    color: var(--gray-700);
    transition: var(--transition);
    text-decoration: none;
}

.sidebar-item:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.sidebar-item.active {
    background: var(--primary);
    color: var(--white);
}

.sidebar-item i {
    width: 20px;
    text-align: center;
}

.content-area {
    flex: 1;
    min-width: 0;
}

/* ===== 工具栏 ===== */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.toolbar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.toolbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ===== 卡片网格 ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.card {
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 20px;
    transition: var(--transition);
}

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

/* ===== 选项卡 ===== */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--gray-200);
    margin-bottom: 20px;
}

.tab-item {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-600);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition);
}

.tab-item:hover {
    color: var(--primary);
}

.tab-item.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .header {
        padding: 0 16px;
    }
    .header-center {
        display: none;
    }
    .main-content {
        padding: 16px;
    }
    .page-layout {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
    }
}