/* ===== 站点性能卡片 ===== */
.perf-card {
    --perf-status-color: #10b981;
    --perf-pulse-color: #10b981;

    position: relative;
    padding: 16px 16px 14px;
    border-radius: var(--border-radius, 14px);
    background-color: var(--bg-card);
    border: 1px solid var(--border-primary);
    overflow: hidden;
    margin-bottom: 16px;
}

/* 顶部 */
.perf-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
}

.perf-card__heading {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.perf-card__title {
    margin: 0;
    font-size: 14px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.perf-card__status {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 9px;
    border-radius: 999px;
    background: color-mix(in srgb, var(--perf-status-color) 12%, transparent);
    color: var(--perf-status-color);
    font-size: 11px;
    font-weight: 600;
}

.perf-card__status-dot {
    position: relative;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--perf-status-color);
}

.perf-card__status-dot::after {
    content: "";
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    border: 2px solid var(--perf-status-color);
    opacity: 0.6;
    animation: perf-pulse 1.6s ease-out infinite;
}

@keyframes perf-pulse {
    0%   { transform: scale(0.5); opacity: 0.7; }
    100% { transform: scale(1.6); opacity: 0;   }
}

/* canvas 心电图带 */
.perf-card__pulse {
    position: relative;
    width: calc(100% + 32px);
    height: 56px;
    margin: 0 -16px 14px;
    background: var(--bg-secondary, var(--bg-card));
    border-top: 1px solid var(--border-secondary, var(--border-primary));
    border-bottom: 1px solid var(--border-secondary, var(--border-primary));
    overflow: hidden;
}

.perf-card__pulse-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.perf-card__pulse-meta {
    position: absolute;
    left: 14px;
    top: 8px;
    font-size: 10px;
    color: var(--text-tertiary, var(--text-secondary));
    letter-spacing: 0.06em;
    text-transform: uppercase;
    pointer-events: none;
}

.perf-card__pulse-meta strong {
    color: var(--perf-pulse-color);
    font-weight: 700;
    margin-left: 4px;
}

/* 实时数据 - 十字分割 2×2 */
.perf-card__live {
    display: grid;
    grid-template-columns: 1fr 1fr;
    margin-bottom: 4px;
}

.perf-card__kpi {
    position: relative;
    padding: 12px 8px 12px 0;
    background: transparent;
    border: 0;
    overflow: hidden;
}

.perf-card__kpi:nth-child(odd) {
    border-right: 1px solid var(--border-secondary, var(--border-primary));
    padding-right: 12px;
}

.perf-card__kpi:nth-child(even) {
    padding-left: 12px;
}

.perf-card__live > .perf-card__kpi:not(:nth-last-child(-n+2)) {
    border-bottom: 1px solid var(--border-secondary, var(--border-primary));
}

.perf-card__kpi-bg {
    position: absolute;
    right: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 64px;
    height: 64px;
    color: color-mix(in srgb, var(--theme-color) 12%, transparent);
    pointer-events: none;
    z-index: 0;
}

html[data-theme="dark"] .perf-card__kpi-bg {
    color: color-mix(in srgb, var(--theme-color) 18%, transparent);
}

.perf-card__kpi-label {
    position: relative;
    z-index: 1;
    font-size: 11px;
    color: var(--text-tertiary, var(--text-secondary));
    margin-bottom: 6px;
    line-height: 1;
}

.perf-card__kpi-num {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: baseline;
    gap: 3px;
    color: var(--text-primary);
    font-weight: 700;
    font-feature-settings: "tnum";
    font-variant-numeric: tabular-nums;
    line-height: 1.05;
}

.perf-card__kpi-value {
    font-size: 19px;
    letter-spacing: -0.02em;
}

.perf-card__kpi-unit {
    font-size: 11px;
    color: var(--text-tertiary, var(--text-secondary));
    font-weight: 500;
}

/* 入场动画 */
@keyframes perf-fade-up {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0);   }
}

.perf-card__kpi { animation: perf-fade-up 0.4s ease-out backwards; }
.perf-card__kpi:nth-child(1) { animation-delay: 0.05s; }
.perf-card__kpi:nth-child(2) { animation-delay: 0.10s; }
.perf-card__kpi:nth-child(3) { animation-delay: 0.15s; }
.perf-card__kpi:nth-child(4) { animation-delay: 0.20s; }

@media (prefers-reduced-motion: reduce) {
    .perf-card__status-dot::after { animation: none; }
    .perf-card__kpi { animation: none; }
}

/* 显示位置控制 */
@media (min-width: 641px) {
    .perf-card--hide-pc { display: none !important; }
}

@media (max-width: 640px) {
    .perf-card--hide-mobile { display: none !important; }
}