/* ==================== 全局变量 ==================== */
:root {
    --bg-main: #0f1117;
    --bg-card: #1a1d29;
    --bg-sidebar: #14161f;
    --bg-input: #252836;
    --bg-hover: #2a2d3a;
    --text-primary: #e4e6eb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent: #6366f1;
    --accent-hover: #5558e3;
    --accent-light: rgba(99, 102, 241, 0.15);
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --border: #2a2d3a;
    --radius: 12px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
}

/* ==================== 登录页 ==================== */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f1117 0%, #1a1d29 100%);
    position: relative;
    overflow: hidden;
}

.login-wrapper::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 50%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.login-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 48px 40px;
    width: 420px;
    max-width: 90vw;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    position: relative;
    z-index: 1;
}

.login-card h2 {
    text-align: center;
    margin-bottom: 8px;
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, #6366f1, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-card .subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 14px;
}

/* ==================== 布局 ==================== */
.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 240px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
    transition: transform 0.3s;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header .logo {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, #6366f1, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-header .logo-sub {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
    border-left: 3px solid transparent;
    font-size: 14px;
    font-weight: 500;
}

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

.nav-item.active {
    background: var(--accent-light);
    color: var(--accent);
    border-left-color: var(--accent);
}

.nav-item .icon {
    font-size: 18px;
    width: 24px;
    text-align: center;
}

.main-content {
    flex: 1;
    margin-left: 240px;
    padding: 24px 32px;
    min-width: 0;
}

.page-header {
    margin-bottom: 24px;
}

.page-header h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

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

/* ==================== 卡片 ==================== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 24px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ==================== 统计卡片 ==================== */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 24px;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s;
}

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

.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 16px;
}

.stat-card .stat-label {
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 4px;
}

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 700;
}

.stat-card .stat-unit {
    font-size: 14px;
    color: var(--text-muted);
    margin-left: 4px;
}

.bg-indigo { background: rgba(99, 102, 241, 0.15); color: #818cf8; }
.bg-green { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.bg-blue { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.bg-amber { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.bg-red { background: rgba(239, 68, 68, 0.15); color: #f87171; }
.bg-purple { background: rgba(168, 85, 247, 0.15); color: #c084fc; }

/* ==================== 进度条 ==================== */
.progress {
    width: 100%;
    height: 10px;
    background: var(--bg-input);
    border-radius: 999px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    border-radius: 999px;
    background: #3b82f6;
    transition: width 0.3s ease;
}

.progress-bar.success { background: #34d399; }
.progress-bar.warning { background: #fbbf24; }
.progress-bar.danger { background: #f87171; }

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

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-control, .form-select, textarea {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 14px;
    color: var(--text-primary);
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-control:focus, .form-select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.form-control::placeholder {
    color: var(--text-muted);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

/* ==================== 按钮 ==================== */
.btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

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

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

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

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

.btn-warning {
    background: var(--warning);
    color: #1a1d29;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
}

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

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

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ==================== 表格 ==================== */
.table-wrapper {
    overflow-x: auto;
}

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

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

th {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tbody tr {
    transition: background 0.15s;
}

tbody tr:hover {
    background: var(--bg-hover);
}

/* ==================== 徽章 ==================== */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.badge-danger { background: rgba(239, 68, 68, 0.2); color: #f87171; }
.badge-warning { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
.badge-info { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.badge-secondary { background: rgba(156, 163, 175, 0.2); color: #d1d5db; }
.badge-purple { background: rgba(168, 85, 247, 0.2); color: #c084fc; }

/* ==================== 权限勾选网格 ==================== */
.perm-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px 16px;
}

.perm-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}

.perm-item:hover {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.06);
}

.perm-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    flex-shrink: 0;
}

/* ==================== 模态框 ==================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

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

.modal {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 28px;
    width: 520px;
    max-width: 90vw;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
}

.modal-lg {
    width: 720px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-footer {
    margin-top: 20px;
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* ==================== 图表 ==================== */
.chart-container {
    position: relative;
    height: 280px;
}

/* ==================== Toast ==================== */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px 20px;
    font-size: 14px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.3s ease;
    min-width: 280px;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.info { border-left: 3px solid var(--info); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ==================== 搜索框 ==================== */
.search-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.search-bar .form-control {
    flex: 1;
}

/* ==================== 标签页 ==================== */
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.tab {
    padding: 10px 20px;
    color: var(--text-secondary);
    cursor: pointer;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.tab:hover { color: var(--text-primary); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ==================== 工具类 ==================== */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.text-sm { font-size: 13px; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-center { text-align: center; }
.hidden { display: none !important; }
.w-full { width: 100%; }
.cursor-pointer { cursor: pointer; }

/* ==================== 文件上传 ==================== */
.file-drop {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.file-drop:hover {
    border-color: var(--accent);
    background: var(--accent-light);
}

.file-drop .upload-icon {
    font-size: 36px;
    margin-bottom: 8px;
}

.file-list {
    margin-top: 12px;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--bg-input);
    border-radius: 8px;
    margin-bottom: 6px;
    font-size: 13px;
}

/* ==================== 移动端顶部栏 ==================== */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--bg-sidebar);
    border-bottom: 1px solid var(--border);
    z-index: 99;
    align-items: center;
    padding: 0 16px;
    gap: 12px;
}

.mobile-menu-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
}

.mobile-menu-btn:hover {
    background: var(--bg-hover);
}

.mobile-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

/* 侧边栏遮罩层 */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

.sidebar-overlay.show {
    display: block;
}

/* ==================== 设置页网格 ==================== */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* ==================== 仪表盘图表网格 ==================== */
.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .mobile-header {
        display: flex;
    }

    .sidebar {
        transform: translateX(-100%);
        z-index: 100;
    }
    .sidebar.show {
        transform: translateX(0);
    }
    .sidebar.show + .sidebar-overlay {
        display: block;
    }

    .main-content {
        margin-left: 0;
        padding: 70px 12px 20px;
    }

    .stat-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .stat-card {
        padding: 16px;
    }

    .stat-card .stat-value {
        font-size: 22px;
    }

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

    .charts-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .bc-grid {
        grid-template-columns: 1fr !important;
    }

    .page-header h1 {
        font-size: 20px;
    }

    .page-header p {
        font-size: 12px;
    }

    .card {
        padding: 16px;
    }

    .modal {
        width: 95vw;
        max-height: 90vh;
        padding: 16px;
        margin: 10px;
    }

    .modal-lg {
        width: 95vw;
    }

    table {
        font-size: 12px;
    }

    th, td {
        padding: 8px 10px;
    }

    .search-bar {
        flex-direction: column;
    }

    .search-bar .btn {
        width: 100%;
    }

    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        flex-wrap: nowrap;
        white-space: nowrap;
    }

    .tab {
        padding: 8px 14px;
        font-size: 13px;
        flex-shrink: 0;
    }

    .flex.justify-between {
        flex-direction: column;
        gap: 10px;
    }

    .toast-container {
        left: 10px;
        right: 10px;
        top: 10px;
    }

    .toast {
        min-width: auto;
        max-width: 100%;
    }

    .btn {
        padding: 10px 16px;
        font-size: 13px;
    }

    .btn-sm {
        padding: 6px 10px;
        font-size: 11px;
    }

    .sidebar-header {
        padding: 16px;
    }

    .sidebar-header .logo {
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 70px 8px 16px;
    }

    .stat-card .stat-value {
        font-size: 18px;
    }

    .modal {
        padding: 12px;
        margin: 5px;
    }

    th, td {
        padding: 6px 8px;
        font-size: 11px;
    }

    .card {
        padding: 12px;
    }

    .page-header h1 {
        font-size: 18px;
    }
}

/* PC端优化 */
@media (min-width: 1200px) {
    .main-content {
        max-width: calc(100vw - 240px);
    }
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* 分页 */
.pagination {
    display: flex;
    gap: 6px;
    justify-content: center;
    margin-top: 20px;
}

.pagination button {
    padding: 8px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
}

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

.pagination button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

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

.empty-state .icon {
    font-size: 48px;
    margin-bottom: 12px;
}