/* ============================================
   0044 — Titanium Tech Style
   钛金科技风 · 冷灰金属色调 · 精密网格线
   ============================================ */

/* --- CSS Variables --- */
:root {
  --titanium-light: #cbd5e1;
  --titanium-mid: #94a3b8;
  --titanium-dark: #475569;
  --zinc-surface: #71717a;
  --zinc-deep: #3f3f46;
  --accent-blue: #38bdf8;
  --accent-amber: #fbbf24;
  --accent-emerald: #34d399;
  --accent-rose: #fb7185;
  --grid-color: rgba(148, 163, 184, 0.06);
  --grid-color-strong: rgba(148, 163, 184, 0.12);
  --titanium-gradient: linear-gradient(135deg, #1e293b 0%, #334155 30%, #475569 60%, #334155 100%);
  --titanium-brush: linear-gradient(180deg, rgba(203,213,225,0.04) 0%, rgba(148,163,184,0.02) 50%, rgba(203,213,225,0.04) 100%);
  --card-border: 1px solid rgba(148, 163, 184, 0.15);
  --card-bg: rgba(30, 41, 59, 0.85);
  --glow-blue: 0 0 20px rgba(56, 189, 248, 0.15);
  --glow-amber: 0 0 20px rgba(251, 191, 36, 0.12);
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

/* --- Precision Grid Background --- */
.titanium-grid {
  background-color: #0f172a;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 40px 40px;
}

.titanium-grid-dense {
  background-color: #0f172a;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px),
    linear-gradient(var(--grid-color-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color-strong) 1px, transparent 1px);
  background-size: 20px 20px, 20px 20px, 100px 100px, 100px 100px;
}

/* --- Brushed Titanium Gradient Overlay --- */
.titanium-brush {
  position: relative;
}
.titanium-brush::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(255,255,255,0.008) 2px,
      rgba(255,255,255,0.008) 4px
    );
  pointer-events: none;
  z-index: 1;
}

/* --- Titanium Card --- */
.titanium-card {
  background: var(--card-bg);
  border: var(--card-border);
  border-radius: 4px;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}
.titanium-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(203,213,225,0.3), transparent);
}
.titanium-card-rounded {
  border-radius: 12px;
}

/* --- Titanium Button --- */
.titanium-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 2rem;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid rgba(148,163,184,0.3);
  background: linear-gradient(180deg, rgba(71,85,105,0.6) 0%, rgba(30,41,59,0.8) 100%);
  color: #e2e8f0;
  cursor: pointer;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  transition: all 0.3s ease;
}
.titanium-btn:hover {
  border-color: var(--accent-blue);
  box-shadow: var(--glow-blue);
  color: #fff;
  transform: translateY(-1px);
}
.titanium-btn-primary {
  border-color: var(--accent-blue);
  background: linear-gradient(180deg, rgba(56,189,248,0.25) 0%, rgba(14,165,233,0.1) 100%);
}
.titanium-btn-amber {
  border-color: var(--accent-amber);
  background: linear-gradient(180deg, rgba(251,191,36,0.2) 0%, rgba(245,158,11,0.08) 100%);
}
.titanium-btn-amber:hover {
  border-color: var(--accent-amber);
  box-shadow: var(--glow-amber);
}

/* --- Section Header with Tech Brackets --- */
.tech-header {
  text-align: center;
  margin-bottom: 3.5rem;
}
.tech-header .bracket {
  display: inline-block;
  color: var(--accent-blue);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  margin-bottom: 0.75rem;
  opacity: 0.7;
}
.tech-header h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: #e2e8f0;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}
.tech-header p {
  color: #94a3b8;
  font-size: 1.05rem;
  max-width: 640px;
  margin: 0 auto;
}

/* --- Data Vis Dashboard Card --- */
.dash-stat {
  background: rgba(30,41,59,0.9);
  border: 1px solid rgba(148,163,184,0.12);
  padding: 1.5rem;
  position: relative;
}
.dash-stat .stat-value {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  color: #e2e8f0;
  line-height: 1;
}
.dash-stat .stat-label {
  font-size: 0.8rem;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-top: 0.5rem;
}
.dash-stat .stat-trend {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  margin-top: 0.5rem;
}
.dash-stat .trend-up { color: var(--accent-emerald); }
.dash-stat .trend-down { color: var(--accent-rose); }
.dash-stat .dot-indicator {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.dot-live {
  background: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* --- Progress Bar (Dashboard style) --- */
.titanium-progress {
  height: 4px;
  background: rgba(148,163,184,0.1);
  border-radius: 0;
  overflow: hidden;
}
.titanium-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-blue), #7dd3fc);
  transition: width 1.5s ease-out;
}

/* --- Ranking Bar --- */
.rank-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  border-left: 3px solid transparent;
  background: rgba(30,41,59,0.5);
  margin-bottom: 0.5rem;
  transition: all 0.3s ease;
}
.rank-bar:hover {
  background: rgba(30,41,59,0.85);
  border-left-color: var(--accent-blue);
}
.rank-bar .rank-num {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: #94a3b8;
  width: 2rem;
  text-align: center;
}
.rank-bar:nth-child(1) .rank-num { color: var(--accent-amber); }
.rank-bar:nth-child(2) .rank-num { color: #c0c0c0; }
.rank-bar:nth-child(3) .rank-num { color: #cd7f32; }

/* --- Feature Icon Box --- */
.feature-icon-box {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(56,189,248,0.08);
  border: 1px solid rgba(56,189,248,0.2);
  font-size: 1.4rem;
  color: var(--accent-blue);
  flex-shrink: 0;
}

/* --- Step Number --- */
.step-num {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  background: rgba(56,189,248,0.1);
  border: 1px solid rgba(56,189,248,0.3);
  color: var(--accent-blue);
  flex-shrink: 0;
}

/* --- Glow Divider --- */
.glow-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56,189,248,0.3), transparent);
  border: none;
  margin: 0;
}

/* --- Corner Accent Lines --- */
.corner-accent {
  position: relative;
}
.corner-accent::before,
.corner-accent::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  pointer-events: none;
  z-index: 2;
}
.corner-accent::before {
  top: -1px; left: -1px;
  border-top: 2px solid rgba(56,189,248,0.4);
  border-left: 2px solid rgba(56,189,248,0.4);
}
.corner-accent::after {
  bottom: -1px; right: -1px;
  border-bottom: 2px solid rgba(56,189,248,0.4);
  border-right: 2px solid rgba(56,189,248,0.4);
}

/* --- Hex Pattern Overlay --- */
.hex-bg {
  background-image:
    url("data:image/svg+xml,%3Csvg width='60' height='52' viewBox='0 0 60 52' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0l30 17.32v34.64H0V17.32z' fill='none' stroke='rgba(148,163,184,0.04)' stroke-width='1'/%3E%3C/svg%3E");
}

/* --- Sparkline placeholder --- */
.sparkline-area {
  height: 48px;
  background: linear-gradient(180deg, rgba(56,189,248,0.08) 0%, transparent 100%);
  border-bottom: 1px solid rgba(56,189,248,0.2);
  position: relative;
  overflow: hidden;
}

/* --- Download Cards --- */
.download-card {
  background: rgba(30,41,59,0.85);
  border: 1px solid rgba(148,163,184,0.15);
  padding: 2rem;
  text-align: center;
  transition: all 0.3s ease;
  cursor: pointer;
}
.download-card:hover {
  border-color: var(--accent-blue);
  box-shadow: var(--glow-blue);
  transform: translateY(-4px);
}
.download-card .dl-icon {
  font-size: 3rem;
  color: #e2e8f0;
  margin-bottom: 1rem;
}

/* --- Scrolling ticker --- */
@keyframes ticker-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.ticker-track {
  display: flex;
  animation: ticker-scroll 30s linear infinite;
  width: max-content;
}

/* --- Glitch text effect --- */
@keyframes glitch-text {
  0%, 100% { text-shadow: none; }
  25% { text-shadow: 2px 0 var(--accent-blue), -2px 0 var(--accent-rose); }
  50% { text-shadow: -2px 0 var(--accent-blue), 2px 0 var(--accent-rose); }
  75% { text-shadow: 1px 0 var(--accent-amber), -1px 0 var(--accent-emerald); }
}

/* --- Scan line --- */
@keyframes scan-line {
  0% { top: -2px; }
  100% { top: calc(100% + 2px); }
}
.scan-line-effect::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(56,189,248,0.4), transparent);
  animation: scan-line 4s linear infinite;
  pointer-events: none;
}

/* --- Responsive helpers --- */
@media (max-width: 768px) {
  .tech-header h2 {
    font-size: 1.6rem;
  }
  .dash-stat .stat-value {
    font-size: 1.8rem;
  }
  .titanium-btn {
    padding: 0.6rem 1.5rem;
    font-size: 0.85rem;
  }
}