/* 主样式文件 - 统计学平台 */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #6366f1;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #0f172a;
    --dark2: #1e293b;
    --dark3: #334155;
    --gray: #64748b;
    --light: #f8fafc;
    --border: #e2e8f0;
}

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--dark);
    color: #e2e8f0;
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    background: var(--dark3);
    color: #fff;
}

.btn:hover {
    background: #475569;
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
}

.btn-primary:hover {
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.4);
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary));
}

/* 表格样式 */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.data-table th {
    font-weight: 500;
    font-size: 13px;
    color: var(--gray);
    background: var(--dark3);
}

.data-table tr:hover {
    background: rgba(255,255,255,0.02);
}

/* 卡片样式 */
.card {
    background: var(--dark2);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 16px;
    padding: 24px;
    transition: all 0.3s;
}

.card:hover {
    border-color: var(--primary);
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.15);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 32px;
}

.page-btn {
    display: inline-block;
    padding: 10px 16px;
    background: var(--dark2);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    color: #94a3b8;
    font-size: 14px;
    transition: all 0.2s;
}

.page-btn:hover {
    background: var(--dark3);
    color: #fff;
}

.page-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

/* 表单 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--gray);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    background: var(--dark);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    padding: 12px 16px;
    color: #fff;
    font-size: 15px;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

/* 徽章 */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
}

.badge-primary {
    background: rgba(37, 99, 235, 0.2);
    color: #60a5fa;
}

.badge-success {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
}

.badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
}

.badge-danger {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

/* 加载动画 */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 60px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--dark3);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

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

.empty-state h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: #94a3b8;
}

/* 响应式 */
@media (max-width: 1024px) {
    .container {
        padding: 0 16px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 12px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 13px;
    }
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark);
}

::-webkit-scrollbar-thumb {
    background: var(--dark3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #475569;
}

/* 选中文本 */
::selection {
    background: rgba(37, 99, 235, 0.3);
    color: #fff;
}

/* 工具类 */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--gray); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }