/* ============ 全局变量 ============ */
:root {
  --bg: #070b14;
  --bg-2: #0c1424;
  --card: rgba(18, 27, 46, 0.72);
  --card-border: rgba(99, 179, 237, 0.15);
  --card-glow: rgba(56, 189, 248, 0.08);
  --primary: #38bdf8;
  --primary-2: #6366f1;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --radius: 14px;
}

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

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(56, 189, 248, 0.12), transparent 60%),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(99, 102, 241, 0.1), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

/* ============ 顶部导航 ============ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 11, 20, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.1rem;
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 12px var(--primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.brand-text small {
  font-weight: 400;
  color: var(--text-dim);
  font-size: 0.7rem;
  margin-left: 0.3rem;
  letter-spacing: 1px;
}

.topbar-stats {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.stat-chip {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.8rem;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  font-size: 0.82rem;
}

.stat-label { color: var(--text-dim); }
.stat-value { color: var(--primary); font-weight: 700; }

.live-chip { color: var(--success); }
.live-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
  animation: pulse 1.2s infinite;
}

.lang-btn {
  padding: 0.35rem 0.9rem;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  border: none;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  letter-spacing: 0.5px;
}
.lang-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.5);
}

/* ============ 概览面板 ============ */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 1.5rem 0;
}

.overview-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.2rem;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
}

.overview-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0.6;
}

.overview-icon { font-size: 1.4rem; margin-bottom: 0.4rem; }
.overview-label { color: var(--text-dim); font-size: 0.78rem; }
.overview-value {
  font-size: 1.6rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-top: 0.2rem;
}
.overview-value small { font-size: 0.85rem; color: var(--text-dim); -webkit-text-fill-color: var(--text-dim); }

.overview-chart {
  height: 40px !important;
  width: 100% !important;
  margin-top: 0.5rem;
}

.country-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.6rem;
  max-height: 48px;
  overflow: hidden;
}
.country-pills span {
  font-size: 0.68rem;
  padding: 0.15rem 0.5rem;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 999px;
  color: var(--primary);
}

/* ============ 区块标题 ============ */
.section-header {
  margin: 2rem 0 1.2rem;
}
.section-header h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}
.section-header p {
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* ============ 服务器卡片网格 ============ */
.server-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1rem;
  padding-bottom: 3rem;
}

.server-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.1rem;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.server-card:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 8px 30px var(--card-glow);
}

.server-card.status-online::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--success);
  box-shadow: 0 0 10px var(--success);
}

.server-card.status-warning::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--warning);
  box-shadow: 0 0 10px var(--warning);
}

.server-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.8rem;
}

.server-identity {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.server-flag {
  font-size: 1.5rem;
  line-height: 1;
}

.server-name {
  font-weight: 700;
  font-size: 0.92rem;
}
.server-country {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 1px;
}

.status-badge {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.7rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}
.status-badge::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 6px currentColor;
}
.status-badge.warning {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
  border-color: rgba(245, 158, 11, 0.3);
}

/* 配置信息 */
.server-spec {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.4rem;
  margin-bottom: 0.8rem;
  padding: 0.5rem;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 8px;
}
.spec-item {
  text-align: center;
}
.spec-item .spec-k {
  font-size: 0.62rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.spec-item .spec-v {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  margin-top: 1px;
}

/* 进度条区域 */
.metrics {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.metric-row {
  display: grid;
  grid-template-columns: 60px 1fr 70px;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
}
.metric-label {
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.metric-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
  overflow: hidden;
}
.metric-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.8s ease;
  background: linear-gradient(90deg, var(--primary), var(--primary-2));
}
.metric-fill.warn { background: linear-gradient(90deg, var(--warning), #fb923c); }
.metric-fill.danger { background: linear-gradient(90deg, var(--danger), #f87171); }
.metric-value {
  text-align: right;
  font-weight: 600;
  color: var(--text);
  font-size: 0.72rem;
}

/* 网络信息 */
.net-info {
  display: flex;
  justify-content: space-between;
  margin-top: 0.7rem;
  padding-top: 0.7rem;
  border-top: 1px dashed var(--card-border);
  font-size: 0.72rem;
}
.net-info .net-col { display: flex; align-items: center; gap: 0.3rem; }
.net-info .down { color: #38bdf8; }
.net-info .up { color: #a78bfa; }
.net-info .ping { color: var(--success); }

/* 曲线图 */
.chart-wrap {
  margin-top: 0.7rem;
  height: 50px;
  position: relative;
}
.chart-wrap canvas {
  width: 100% !important;
  height: 100% !important;
}

/* 底部 */
.footer {
  text-align: center;
  padding: 1.5rem 0;
  color: var(--text-dim);
  font-size: 0.78rem;
  border-top: 1px solid var(--card-border);
  margin-top: 1rem;
}

/* 响应式 */
@media (max-width: 900px) {
  .overview-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .overview-grid { grid-template-columns: 1fr; }
  .topbar-stats { width: 100%; justify-content: flex-start; }
  .server-grid { grid-template-columns: 1fr; }
}