/* ===== AI受众识别系统 - 全局样式 ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: #1a2035;
    --bg-card-hover: #1f2847;
    --border-subtle: rgba(255,255,255,0.06);
    --border-glow: rgba(99,102,241,0.3);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-blue: #6366f1;
    --accent-purple: #8b5cf6;
    --accent-cyan: #06b6d4;
    --accent-green: #10b981;
    --accent-amber: #f59e0b;
    --accent-red: #ef4444;
    --accent-pink: #ec4899;
    --gradient-primary: linear-gradient(135deg, #6366f1, #8b5cf6);
    --gradient-success: linear-gradient(135deg, #10b981, #06b6d4);
    --gradient-warm: linear-gradient(135deg, #f59e0b, #ef4444);
    --shadow-card: 0 4px 24px rgba(0,0,0,0.3);
    --shadow-glow: 0 0 30px rgba(99,102,241,0.15);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* ===== 背景动画 ===== */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 20% 50%, rgba(99,102,241,0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(139,92,246,0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 40% 80%, rgba(6,182,212,0.05) 0%, transparent 50%);
    animation: bgShift 20s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}
@keyframes bgShift {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(-2%, 1%) rotate(1deg); }
    66% { transform: translate(1%, -2%) rotate(-1deg); }
}

/* ===== 导航栏 ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(17,24,39,0.85);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-subtle);
    padding: 0 32px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 18px;
}

.navbar-brand .logo {
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: 0 0 20px rgba(99,102,241,0.3);
}

.navbar-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.nav-tabs {
    display: flex;
    gap: 4px;
    background: rgba(255,255,255,0.04);
    border-radius: 12px;
    padding: 4px;
}

.nav-tab {
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    background: transparent;
}

.nav-tab:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
.nav-tab.active { color: #fff; background: var(--accent-blue); box-shadow: 0 2px 12px rgba(99,102,241,0.4); }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 16px rgba(99,102,241,0.3);
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(99,102,241,0.4);
}

.btn-success {
    background: var(--gradient-success);
    color: #fff;
    box-shadow: 0 4px 16px rgba(16,185,129,0.3);
}

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

.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

.btn .spinner {
    width: 16px; height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: none;
}
.btn.loading .spinner { display: inline-block; }
.btn.loading .btn-text { opacity: 0.7; }

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

/* ===== 主容器 ===== */
.main-container {
    position: relative;
    z-index: 1;
    max-width: 1440px;
    margin: 0 auto;
    padding: 28px 32px;
}

/* ===== 页面切换 ===== */
.page { display: none; }
.page.active { display: block; animation: fadeIn 0.4s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ===== 统计卡片网格 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 28px;
}

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

.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    border-radius: var(--radius) var(--radius) 0 0;
}

.stat-card:nth-child(1)::before { background: var(--gradient-primary); }
.stat-card:nth-child(2)::before { background: var(--gradient-success); }
.stat-card:nth-child(3)::before { background: linear-gradient(135deg, var(--accent-amber), var(--accent-pink)); }
.stat-card:nth-child(4)::before { background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue)); }

.stat-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.stat-icon {
    width: 44px; height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 16px;
}

.stat-card:nth-child(1) .stat-icon { background: rgba(99,102,241,0.15); }
.stat-card:nth-child(2) .stat-icon { background: rgba(16,185,129,0.15); }
.stat-card:nth-child(3) .stat-icon { background: rgba(245,158,11,0.15); }
.stat-card:nth-child(4) .stat-icon { background: rgba(6,182,212,0.15); }

.stat-value {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #fff 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

.stat-badge {
    position: absolute;
    top: 20px; right: 20px;
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: 600;
}
.stat-badge.up { background: rgba(16,185,129,0.15); color: var(--accent-green); }
.stat-badge.warn { background: rgba(245,158,11,0.15); color: var(--accent-amber); }

/* ===== 图表容器 ===== */
.charts-grid {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 20px;
    margin-bottom: 28px;
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
}

.chart-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

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

.chart-title {
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.chart-title .dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    box-shadow: 0 0 8px var(--accent-green);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.chart-container { height: 300px; }

/* ===== 数据表格 ===== */
.data-table-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 28px;
}

.table-wrapper { overflow-x: auto; }

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

thead th {
    text-align: left;
    padding: 12px 16px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-subtle);
}

tbody td {
    padding: 14px 16px;
    font-size: 13px;
    border-bottom: 1px solid rgba(255,255,255,0.03);
}

tbody tr { transition: var(--transition); }
tbody tr:hover { background: rgba(99,102,241,0.04); }

/* ===== 标签 ===== */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
}

.tag-blue { background: rgba(99,102,241,0.15); color: var(--accent-blue); }
.tag-green { background: rgba(16,185,129,0.15); color: var(--accent-green); }
.tag-amber { background: rgba(245,158,11,0.15); color: var(--accent-amber); }
.tag-red { background: rgba(239,68,68,0.15); color: var(--accent-red); }
.tag-purple { background: rgba(139,92,246,0.15); color: var(--accent-purple); }
.tag-cyan { background: rgba(6,182,212,0.15); color: var(--accent-cyan); }

/* ===== 进度条 ===== */
.progress-bar {
    height: 6px;
    background: rgba(255,255,255,0.06);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 1s ease;
}

.progress-fill.blue { background: var(--gradient-primary); }
.progress-fill.green { background: var(--gradient-success); }
.progress-fill.amber { background: var(--gradient-warm); }

/* ===== 用户路径页 ===== */
.path-controls {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.path-controls select, .path-controls input {
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 13px;
    transition: var(--transition);
}

.path-controls select:focus, .path-controls input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.2);
}

.path-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* ===== 配置面板 ===== */
.config-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.config-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: rgba(255,255,255,0.02);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    transition: var(--transition);
}

.config-item:hover { border-color: var(--border-glow); }

.config-item label {
    font-size: 13px;
    color: var(--text-secondary);
}

.config-item input {
    width: 80px;
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
    text-align: center;
}

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

.empty-state .icon { font-size: 48px; margin-bottom: 16px; }
.empty-state p { font-size: 14px; }

/* ===== 通知/Toast ===== */
.toast-container {
    position: fixed;
    top: 80px;
    right: 24px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    backdrop-filter: blur(20px);
    animation: slideIn 0.3s ease, slideOut 0.3s ease 2.7s;
    min-width: 280px;
    box-shadow: var(--shadow-card);
}

.toast-success { background: rgba(16,185,129,0.9); color: #fff; }
.toast-error { background: rgba(239,68,68,0.9); color: #fff; }
.toast-info { background: rgba(99,102,241,0.9); color: #fff; }

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

/* ===== 流水线步骤条 ===== */
.pipeline-steps {
    display: flex;
    align-items: center;
    gap: 0;
    margin: 24px 0;
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border-subtle);
    overflow-x: auto;
}

.pipeline-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    min-width: 120px;
    position: relative;
}

.pipeline-step .step-icon {
    width: 40px; height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    background: rgba(255,255,255,0.05);
    border: 2px solid var(--border-subtle);
    transition: var(--transition);
    margin-bottom: 8px;
}

.pipeline-step.active .step-icon {
    border-color: var(--accent-blue);
    background: rgba(99,102,241,0.2);
    box-shadow: 0 0 20px rgba(99,102,241,0.3);
    animation: pulse 1.5s infinite;
}

.pipeline-step.done .step-icon {
    border-color: var(--accent-green);
    background: rgba(16,185,129,0.2);
}

.pipeline-step .step-label {
    font-size: 11px;
    color: var(--text-muted);
    text-align: center;
}

.pipeline-step.active .step-label { color: var(--accent-blue); }
.pipeline-step.done .step-label { color: var(--accent-green); }

.pipeline-connector {
    height: 2px;
    flex: 1;
    background: var(--border-subtle);
    min-width: 20px;
}

.pipeline-connector.done { background: var(--accent-green); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .charts-grid { grid-template-columns: 1fr; }
    .path-detail-grid { grid-template-columns: 1fr; }
    .config-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .stats-grid { grid-template-columns: 1fr; }
    .navbar { padding: 0 16px; }
    .main-container { padding: 16px; }
    .nav-tabs { display: none; }
}