/* 龙猫云全球网络实验室 (totorocloud.cam) Submarine Fiber & Telemetry Radar Theme */
:root {
  --bg-dark: #030F15;
  --bg-surface: #071D28;
  --bg-card: rgba(8, 30, 44, 0.88);
  --border: rgba(6, 182, 212, 0.3);
  --border-glow: rgba(6, 182, 212, 0.7);
  --primary: #06B6D4;
  --primary-glow: #22D3EE;
  --primary-gradient: linear-gradient(135deg, #22D3EE 0%, #06B6D4 50%, #0891B2 100%);
  --accent: #34D399;
  --text-main: #ECFEFF;
  --text-sub: #CFFAFE;
  --text-muted: #67E8F9;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", sans-serif;
  --max-w: 1200px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg-dark); color: var(--text-sub); font-family: var(--font); line-height: 1.68; min-height: 100vh; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.navbar { position: sticky; top: 0; z-index: 100; backdrop-filter: blur(16px); background: rgba(3,15,21,0.92); border-bottom: 1px solid var(--border); padding: 16px 0; }
.navbar-inner { display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: #FFF; font-size: 20px; font-weight: 800; }
.brand img { width: 38px; height: 38px; border-radius: 8px; filter: drop-shadow(0 2px 8px rgba(6,182,212,0.4)); }
.brand span { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.nav-menu { display: flex; align-items: center; gap: 24px; list-style: none; }
.nav-menu a { color: var(--text-sub); text-decoration: none; font-size: 14px; font-weight: 500; transition: color 0.2s; }
.nav-menu a:hover, .nav-menu a.active { color: var(--primary-glow); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 22px; border-radius: 8px; font-weight: 700; text-decoration: none; transition: all 0.25s; cursor: pointer; border: none; font-size: 14px; }
.btn-primary { background: var(--primary-gradient); color: #030F15; box-shadow: 0 4px 18px rgba(6,182,212,0.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(6,182,212,0.6); }
.btn-outline { background: rgba(6,182,212,0.08); border: 1px solid var(--border); color: #FFF; }
.btn-outline:hover { background: rgba(6,182,212,0.18); border-color: var(--primary-glow); }

/* Radar Hero */
.hero { padding: 75px 0 50px; text-align: center; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 6px 18px; background: rgba(6,182,212,0.12); border: 1px solid var(--border); border-radius: 999px; font-size: 13px; color: var(--primary-glow); margin-bottom: 20px; font-weight: 700; }
.hero h1 { font-size: 42px; line-height: 1.25; color: #FFF; font-weight: 900; margin-bottom: 20px; }
.hero h1 span { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { font-size: 17px; color: var(--text-sub); max-width: 760px; margin: 0 auto 30px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; margin-bottom: 30px; }

/* Submarine Telemetry Map Card */
.telemetry-card { background: var(--bg-card); border: 1px solid var(--border-glow); border-radius: 20px; padding: 30px; max-width: 900px; margin: 30px auto; text-align: left; }
.telemetry-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; padding-bottom: 12px; border-bottom: 1px solid rgba(6,182,212,0.15); }
.telemetry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.telemetry-box { background: rgba(255,255,255,0.03); border: 1px solid rgba(6,182,212,0.15); border-radius: 12px; padding: 16px; text-align: center; }
.telemetry-val { font-size: 24px; font-weight: 800; color: #FFF; }
.telemetry-lbl { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 28px; transition: all 0.3s; }
.card:hover { transform: translateY(-4px); border-color: var(--primary); box-shadow: 0 10px 30px rgba(6,182,212,0.25); }
.card h3 { font-size: 19px; color: #FFF; margin-bottom: 12px; font-weight: 700; }
.card p { font-size: 14px; color: #A5F3FC; line-height: 1.6; }

.breadcrumb { display: flex; gap: 8px; font-size: 13px; color: var(--text-muted); margin-bottom: 24px; }
.breadcrumb a { color: var(--primary-glow); text-decoration: none; }

.footer { border-top: 1px solid var(--border); padding: 50px 0 30px; background: rgba(3,15,21,0.98); margin-top: 80px; }
.footer-links-box { margin-bottom: 30px; padding: 24px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; }
.footer-links-title { font-size: 14px; font-weight: 700; color: #FFF; margin-bottom: 16px; }
.footer-links-grid { display: flex; flex-wrap: wrap; gap: 14px 20px; }
.footer-links-grid a { color: #A5F3FC; font-size: 13px; text-decoration: none; }
.footer-links-grid a:hover { color: var(--primary-glow); }
.footer-copy { text-align: center; font-size: 13px; color: #67E8F9; padding-top: 20px; border-top: 1px solid rgba(6,182,212,0.1); }
@media (max-width: 800px) {
  .telemetry-grid, .grid-3 { grid-template-columns: 1fr; }
  .nav-menu { display: none; }
  .hero h1 { font-size: 30px; }
}