/* ==========================================================================
   数智资产与高价值标的智能侦测中枢 · 顶部导航与栅格布局 (Layout & Navbar)
   ========================================================================== */

/* 顶部导航 Header */
header {
    min-height: 68px;
    background: var(--header-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 24px;
    position: sticky;
    top: 0;
    z-index: 50;
    gap: 12px;
    flex-wrap: wrap;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 14px;
    flex: 1;
    min-width: 260px;
}

.brand-logo {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #3b82f6, #10b981);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 0 16px rgba(59, 130, 246, 0.35);
    flex-shrink: 0;
}

.brand-title {
    font-size: 15px;
    font-weight: 700;
    letter-spacing: -0.3px;
    color: var(--text-primary);
    white-space: nowrap;
}

.brand-subtitle {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 1px;
}

/* 业务 Tab 切换器 (登录后展示) */
.nav-tabs {
    display: none;
    gap: 8px;
    margin-left: 12px;
    overflow-x: auto;
    white-space: nowrap;
    padding-bottom: 2px;
}

.tab-btn {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border-glass);
    background: var(--input-bg);
    color: var(--text-secondary);
    flex-shrink: 0;
}

.tab-btn.active-house {
    background: rgba(59, 130, 246, 0.15);
    border-color: var(--border-accent);
    color: var(--accent-primary);
}

.tab-btn.active-company {
    background: rgba(16, 185, 129, 0.15);
    border-color: rgba(16, 185, 129, 0.45);
    color: var(--accent-emerald);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

/* 🎨 三模态亮度切换胶囊 */
.theme-switcher {
    display: inline-flex;
    background: var(--switcher-bg);
    border: 1px solid var(--border-glass);
    padding: 3px;
    border-radius: 20px;
    gap: 2px;
}

.theme-btn {
    padding: 4px 8px;
    border-radius: 16px;
    font-size: 11px;
    font-weight: 600;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 2px;
}

.theme-btn:hover {
    color: var(--text-primary);
}

.theme-btn.active {
    background: var(--switcher-active);
    color: var(--text-primary);
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

/* 登录后大盘容器 (未登录完全隐藏) */
.dashboard-container {
    display: none;
    padding: 24px;
    max-width: 1440px;
    margin: 0 auto;
    width: 100%;
    flex: 1;
}

/* 统计卡片栅格 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: 14px;
    padding: 16px 18px;
    box-shadow: var(--shadow-card);
}

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

.stat-label {
    font-size: 11.5px;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 6px;
}

.stat-value {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.stat-sub {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* 房源与企业列表卡片栅格 */
.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 18px;
}