/* ===== 全局变量 ===== */
:root {
    --sidebar-width: 220px;
    --sidebar-bg: #1a1f36;
    --sidebar-hover: #2a3050;
    --sidebar-active: #3b4470;
    --primary: #4361ee;
    --primary-light: #eef0ff;
    --success: #10b981;
    --success-light: #ecfdf5;
    --warning: #f59e0b;
    --warning-light: #fffbeb;
    --danger: #ef4444;
    --danger-light: #fef2f2;
    --info: #06b6d4;
    --info-light: #ecfeff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --bg: #f1f5f9;
    --card-bg: #fff;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; color: var(--text); background: var(--bg); display: flex; min-height: 100vh; }
a { color: var(--primary); text-decoration: none; }
code { background: #f1f5f9; padding: 2px 6px; border-radius: 4px; font-size: 0.85em; }
pre code { background: none; padding: 0; }

/* ===== 侧边栏 ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: #fff;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform .3s;
}
.sidebar-header {
    padding: 20px 16px;
    border-bottom: 1px solid rgba(255,255,255,.1);
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { font-size: 24px; }
.logo-text { font-size: 16px; font-weight: 700; letter-spacing: .5px; }
.sidebar-nav { flex: 1; padding: 12px 8px; overflow-y: auto; }
.nav-item {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 12px; border-radius: 6px; color: #94a3b8;
    font-size: 14px; transition: all .2s; margin-bottom: 2px;
}
.nav-item:hover { background: var(--sidebar-hover); color: #e2e8f0; }
.nav-item.active { background: var(--sidebar-active); color: #fff; font-weight: 600; }
.nav-icon { font-size: 18px; width: 24px; text-align: center; }
.nav-divider { height: 1px; background: rgba(255,255,255,.1); margin: 12px 8px; }
.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid rgba(255,255,255,.1);
    display: flex; align-items: center; justify-content: space-between;
}
.user-info { display: flex; align-items: center; gap: 8px; color: #94a3b8; font-size: 13px; }
.user-avatar {
    width: 28px; height: 28px; border-radius: 50%;
    background: var(--primary); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 12px;
}
.logout-btn {
    color: #94a3b8; font-size: 18px; cursor: pointer;
    background: none; border: none; padding: 4px;
}
.logout-btn:hover { color: var(--danger); }

/* ===== 主内容区 ===== */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1; min-height: 100vh;
    display: flex; flex-direction: column;
}
.top-bar {
    background: var(--card-bg);
    padding: 12px 24px;
    display: flex; align-items: center; gap: 16px;
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 50;
}
.menu-toggle {
    display: none; background: none; border: none;
    font-size: 20px; cursor: pointer; color: var(--text);
}
.page-title { font-size: 18px; font-weight: 700; flex: 1; }
.top-actions { display: flex; gap: 8px; }
.content-area { padding: 24px; flex: 1; }

/* ===== 卡片 ===== */
.card {
    background: var(--card-bg); border-radius: var(--radius);
    box-shadow: var(--shadow); overflow: hidden;
}
.card-header {
    padding: 16px 20px; border-bottom: 1px solid var(--border);
    display: flex; align-items: center; justify-content: space-between;
}
.card-header h3 { font-size: 15px; font-weight: 600; }
.card-body { padding: 20px; }

/* ===== 表格 ===== */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th {
    background: #f8fafc; padding: 10px 12px; text-align: left;
    font-weight: 600; font-size: 12px; text-transform: uppercase;
    letter-spacing: .5px; color: var(--text-secondary);
    border-bottom: 2px solid var(--border); white-space: nowrap;
}
.table td {
    padding: 10px 12px; border-bottom: 1px solid var(--border);
    vertical-align: top;
}
.table tr:hover { background: #f8fafc; }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 8px 16px; border-radius: 6px; font-size: 13px; font-weight: 500;
    border: 1px solid transparent; cursor: pointer; transition: all .2s;
    white-space: nowrap;
}
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #3651d4; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover { background: #d97706; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-secondary { background: #f1f5f9; color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: #e2e8f0; }
.btn-block { width: 100%; }
.btn-group { display: flex; gap: 4px; flex-wrap: wrap; }

/* ===== 表单 ===== */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block; font-size: 13px; font-weight: 600;
    margin-bottom: 4px; color: var(--text);
}
.form-hint { display: block; font-size: 12px; color: var(--text-secondary); margin-top: 4px; }
.required { color: var(--danger); }
input[type="text"], input[type="password"], input[type="number"],
input[type="datetime-local"], select, textarea {
    width: 100%; padding: 8px 12px; border: 1px solid var(--border);
    border-radius: 6px; font-size: 14px; transition: border-color .2s;
    background: #fff; color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
textarea { resize: vertical; }
.form-select {
    width: auto; padding: 6px 12px; border: 1px solid var(--border);
    border-radius: 6px; font-size: 13px; background: #fff;
}
.form-section {
    border: 1px solid var(--border); border-radius: var(--radius);
    padding: 16px; margin-bottom: 16px; background: #fafbfc;
}
.form-section h4 {
    font-size: 14px; font-weight: 600; margin-bottom: 12px;
    padding-bottom: 8px; border-bottom: 1px solid var(--border);
}
.form-actions { display: flex; gap: 8px; justify-content: flex-end; padding-top: 16px; border-top: 1px solid var(--border); margin-top: 8px; }
.checkbox-label { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.checkbox-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 8px; }
.checkbox-item { display: flex; align-items: center; gap: 6px; font-size: 13px; cursor: pointer; padding: 4px 0; }

/* ===== 徽章 ===== */
.badge {
    display: inline-block; padding: 2px 8px; border-radius: 4px;
    font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .3px;
}
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-info { background: var(--info-light); color: var(--info); }
.badge-secondary { background: #f1f5f9; color: var(--text-secondary); }

/* ===== 标签 ===== */
.tag {
    display: inline-block; padding: 2px 8px; border-radius: 4px;
    font-size: 12px; background: #f1f5f9; color: var(--text); margin: 1px 2px;
}
.tag-green { background: var(--success-light); color: var(--success); }

/* ===== 仪表板 ===== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
    background: var(--card-bg); border-radius: var(--radius);
    padding: 20px; box-shadow: var(--shadow); display: flex; align-items: center; gap: 16px;
}
.stat-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 22px; }
.stat-value { font-size: 28px; font-weight: 700; line-height: 1; }
.stat-label { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

.dashboard-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }

.quick-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.quick-action-btn {
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    padding: 16px 24px; border: 1px solid var(--border); border-radius: var(--radius);
    background: #fff; cursor: pointer; transition: all .2s; min-width: 100px;
    color: var(--text); text-decoration: none; font-size: 13px;
}
.quick-action-btn:hover { border-color: var(--primary); background: var(--primary-light); color: var(--primary); }
.qa-icon { font-size: 28px; }

/* ===== 策略卡片 ===== */
.strategy-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.strategy-card {
    padding: 12px; border: 1px solid var(--border); border-radius: var(--radius);
    background: #fafbfc;
}
.strategy-card p { font-size: 13px; margin-top: 6px; color: var(--text-secondary); }

/* ===== 模态框 ===== */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,.5);
    display: none; align-items: center; justify-content: center;
    z-index: 1000; padding: 20px;
}
.modal-overlay.show { display: flex; }
.modal {
    background: #fff; border-radius: 12px; width: 100%; max-width: 640px;
    max-height: 90vh; display: flex; flex-direction: column;
    box-shadow: var(--shadow-lg); animation: modalIn .2s;
}
@keyframes modalIn { from { transform: translateY(-20px); opacity: 0; } to { transform: none; opacity: 1; } }
.modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 20px; border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 16px; font-weight: 600; }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-secondary); padding: 4px; line-height: 1; }
.modal-close:hover { color: var(--text); }
.modal-body { padding: 20px; overflow-y: auto; flex: 1; }
.modal-footer { padding: 12px 20px; border-top: 1px solid var(--border); display: flex; gap: 8px; justify-content: flex-end; }
.confirm-modal { max-width: 420px; }

/* ===== Toast ===== */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 2000; display: flex; flex-direction: column; gap: 8px; }
.toast {
    padding: 12px 20px; border-radius: 8px; font-size: 14px; font-weight: 500;
    color: #fff; animation: toastIn .3s; min-width: 200px; box-shadow: var(--shadow-lg);
}
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-warning { background: var(--warning); }
.toast-info { background: var(--info); }
@keyframes toastIn { from { transform: translateX(100%); opacity: 0; } to { transform: none; opacity: 1; } }

/* ===== 日志详情 ===== */
.log-detail-item { padding: 8px 0; border-bottom: 1px solid var(--border); }
.log-detail-item:last-child { border-bottom: none; }
.log-groups { margin-top: 4px; padding-left: 16px; }
.log-group-item { margin-right: 8px; font-size: 13px; }

/* ===== 空状态 ===== */
.empty-state { text-align: center; padding: 40px 20px; color: var(--text-secondary); }
.empty-state p { margin-bottom: 12px; }

/* ===== 登录页 ===== */
.login-body {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh; background: linear-gradient(135deg, #1a1f36 0%, #2d3561 100%);
}
.login-card {
    background: #fff; border-radius: 16px; padding: 40px;
    width: 100%; max-width: 400px; box-shadow: var(--shadow-lg);
}
.login-header { text-align: center; margin-bottom: 32px; }
.login-logo { font-size: 48px; margin-bottom: 12px; }
.login-header h1 { font-size: 22px; margin-bottom: 4px; }
.login-header p { color: var(--text-secondary); font-size: 14px; }
.login-form .form-group { margin-bottom: 20px; }
.login-form label { font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.login-footer { text-align: center; margin-top: 24px; }
.login-footer p { color: var(--text-secondary); font-size: 13px; }

/* ===== 警告框 ===== */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-danger { background: var(--danger-light); color: var(--danger); border: 1px solid #fecaca; }

/* ===== 辅助 ===== */
.text-muted { color: var(--text-secondary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: none; }
    .main-content { margin-left: 0; }
    .menu-toggle { display: block; }
    .dashboard-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}