:root {
  --bg-dark: #070D19;
  --bg-surface: #0F172A;
  --bg-card: #1E293B;
  --bg-card-hover: #26354D;
  --border-subtle: rgba(148, 163, 184, 0.18);
  --border-highlight: rgba(59, 130, 246, 0.45);
  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --azure-blue: #2563EB;
  --azure-sky: #38BDF8;
  --accent-purple: #8B5CF6;
  --accent-emerald: #10B981;
  --accent-amber: #F59E0B;
  --accent-rose: #F43F5E;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at 15% 0%, #172554 0%, var(--bg-dark) 42%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* Sticky Top Navigation */
.top-navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 13, 25, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 10px 24px;
}

.nav-inner {
  max-width: 1380px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-badge {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--azure-blue), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 15px;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.45);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.brand-sub {
  font-size: 11px;
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 12.5px;
  font-weight: 600;
  padding: 6px 11px;
  border-radius: 8px;
  transition: all 0.18s ease;
}

.nav-link:hover, .nav-link.active {
  background: rgba(37, 99, 235, 0.18);
  color: #60A5FA;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-surface);
  padding: 3px;
  border-radius: 9px;
  border: 1px solid var(--border-subtle);
}

.lang-btn {
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: 4px 9px;
  border-radius: 6px;
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
}

.lang-btn.active {
  background: var(--azure-blue);
  color: #FFFFFF;
}

/* Container & Sections */
.container {
  max-width: 1380px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.hero {
  padding: 44px 0 32px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 40px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(37, 99, 235, 0.16);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--azure-sky);
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 16px;
}

.hero-title {
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 800;
  line-height: 1.18;
  margin-bottom: 14px;
  max-width: 1080px;
}

.text-gradient {
  background: linear-gradient(90deg, #60A5FA, #38BDF8, #A78BFA);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 960px;
  margin-bottom: 24px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.btn-primary, .btn-secondary, .btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 10px;
  font-size: 13.5px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.18s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, #2563EB, #4F46E5);
  color: #FFFFFF;
  box-shadow: 0 8px 22px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 26px rgba(37, 99, 235, 0.5);
}

.btn-secondary {
  background: rgba(16, 185, 129, 0.15);
  color: #34D399;
  border-color: rgba(16, 185, 129, 0.4);
}

.btn-secondary:hover {
  background: rgba(16, 185, 129, 0.25);
}

.btn-outline {
  background: rgba(30, 41, 59, 0.75);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-outline:hover {
  border-color: var(--azure-sky);
  color: var(--azure-sky);
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.kpi-card {
  background: rgba(15, 23, 42, 0.82);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 16px 18px;
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--azure-sky), var(--accent-purple));
}

.kpi-val {
  font-size: 26px;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 4px;
}

.kpi-label {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--azure-sky);
  margin-bottom: 4px;
}

.kpi-sub {
  font-size: 11.5px;
  color: var(--text-muted);
}

/* Section Headers */
.section-block {
  margin-bottom: 56px;
  scroll-margin-top: 76px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.section-tag {
  font-size: 11.5px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--azure-sky);
  margin-bottom: 4px;
}

.section-title {
  font-size: 24px;
  font-weight: 800;
  color: #FFFFFF;
}

.section-subtitle {
  font-size: 13.5px;
  color: var(--text-muted);
  max-width: 780px;
}

/* Pill Tabs */
.tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.tab-btn {
  background: var(--bg-surface);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  padding: 9px 16px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.16s ease;
}

.tab-btn:hover {
  border-color: var(--azure-sky);
  color: #FFFFFF;
}

.tab-btn.active {
  background: linear-gradient(135deg, #2563EB, #1D4ED8);
  color: #FFFFFF;
  border-color: #60A5FA;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

/* Grid & Panels */
.panel-grid-2 {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 20px;
}

.panel-grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 18px;
}

.glass-panel {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 22px;
}

.panel-title {
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.badge {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
}

.badge-blue { background: rgba(37, 99, 235, 0.2); color: #60A5FA; border: 1px solid rgba(96, 165, 250, 0.35); }
.badge-green { background: rgba(16, 185, 129, 0.2); color: #34D399; border: 1px solid rgba(52, 211, 153, 0.35); }
.badge-amber { background: rgba(245, 158, 11, 0.2); color: #FBBF24; border: 1px solid rgba(251, 191, 36, 0.35); }
.badge-rose { background: rgba(244, 63, 94, 0.2); color: #FB7185; border: 1px solid rgba(251, 113, 133, 0.35); }
.badge-purple { background: rgba(139, 92, 246, 0.2); color: #C4B5FD; border: 1px solid rgba(196, 181, 253, 0.35); }

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-list li {
  background: rgba(30, 41, 59, 0.55);
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 13px;
}

.feature-list strong {
  color: #F8FAFC;
}

/* Architecture Flow SVG / Nodes */
.arch-diagram-box {
  background: #090F1E;
  border: 1px solid rgba(56, 189, 248, 0.28);
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 18px;
}

.arch-lanes {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.arch-node {
  background: rgba(30, 41, 59, 0.85);
  border: 1px solid rgba(96, 165, 250, 0.35);
  border-radius: 12px;
  padding: 14px;
  position: relative;
}

.arch-node-step {
  font-size: 10.5px;
  font-weight: 800;
  color: var(--azure-sky);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.arch-node-title {
  font-size: 14px;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 6px;
}

.arch-node-desc {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Decision Wizard */
.wizard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.wizard-field label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.wizard-field select {
  width: 100%;
  background: #1E293B;
  color: #F8FAFC;
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 13px;
  font-weight: 600;
}

.wizard-result {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.16), rgba(139, 92, 246, 0.14));
  border: 1px solid rgba(96, 165, 250, 0.45);
  border-radius: 12px;
  padding: 16px 18px;
}

/* Comparison Table */
.table-scroll {
  overflow-x: auto;
  border-radius: 14px;
  border: 1px solid var(--border-subtle);
  margin-bottom: 20px;
}

.comp-table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(15, 23, 42, 0.9);
  font-size: 12.5px;
}

.comp-table th {
  background: #1E293B;
  color: #F8FAFC;
  text-align: left;
  padding: 12px 14px;
  font-size: 12px;
  font-weight: 800;
  border-bottom: 2px solid rgba(148, 163, 184, 0.25);
}

.comp-table td {
  padding: 11px 14px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.14);
  color: var(--text-secondary);
  vertical-align: top;
}

.comp-table tr:hover td {
  background: rgba(37, 99, 235, 0.08);
}

/* Interactive Voice Sandbox */
.sandbox-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  background: #0B1325;
  border: 1px solid var(--border-highlight);
  border-radius: 14px;
  padding: 14px 18px;
  margin-bottom: 16px;
}

.sandbox-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.sandbox-3col {
  display: grid;
  grid-template-columns: 1.15fr 1.1fr 0.95fr;
  gap: 16px;
}

.waveform-box {
  background: #060B16;
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 12px;
  padding: 10px 14px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

#audioCanvas {
  width: 100%;
  height: 46px;
  display: block;
}

.transcript-feed {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 430px;
  overflow-y: auto;
  padding-right: 4px;
}

.turn-bubble {
  border-radius: 12px;
  padding: 11px 14px;
  font-size: 12.5px;
  border: 1px solid rgba(148, 163, 184, 0.18);
}

.turn-customer {
  background: rgba(30, 41, 59, 0.85);
  border-left: 4px solid var(--azure-sky);
}

.turn-agent {
  background: rgba(37, 99, 235, 0.15);
  border-left: 4px solid var(--accent-emerald);
}

.turn-system {
  background: rgba(244, 63, 94, 0.15);
  border-left: 4px solid var(--accent-rose);
}

.turn-meta {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.turn-zh {
  margin-top: 5px;
  padding-top: 5px;
  border-top: 1px dashed rgba(148, 163, 184, 0.2);
  font-size: 11.5px;
  color: #93C5FD;
}

.code-trace {
  background: #060B16;
  color: #E2E8F0;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 12px;
  padding: 12px 14px;
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 11.5px;
  line-height: 1.5;
  max-height: 360px;
  overflow-y: auto;
  white-space: pre-wrap;
}

.operator-card {
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid rgba(245, 158, 11, 0.4);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 12px;
}

/* Live Mic & Custom Utterance Bar */
.live-input-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  background: rgba(15, 23, 42, 0.92);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: 14px;
  padding: 12px 16px;
  margin-bottom: 16px;
}

.live-input-field {
  flex: 1;
  min-width: 240px;
  background: #060B16;
  color: #F8FAFC;
  border: 1px solid rgba(148, 163, 184, 0.32);
  border-radius: 9px;
  padding: 9px 14px;
  font-size: 13px;
}

.live-input-field:focus {
  outline: none;
  border-color: var(--azure-sky);
}

.preset-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  width: 100%;
  padding-top: 4px;
}

.chip-btn {
  background: rgba(30, 41, 59, 0.85);
  color: #93C5FD;
  border: 1px solid rgba(96, 165, 250, 0.28);
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.chip-btn:hover {
  background: rgba(37, 99, 235, 0.28);
  color: #FFFFFF;
}

/* Latency Waterfall Box */
.waterfall-box {
  background: #060B16;
  border: 1px solid rgba(139, 92, 246, 0.32);
  border-radius: 12px;
  padding: 10px 12px;
  margin-bottom: 10px;
}

.wf-row {
  display: grid;
  grid-template-columns: 170px 1fr 54px;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  margin-bottom: 5px;
  color: #CBD5E1;
}

.wf-track {
  height: 8px;
  background: rgba(30, 41, 59, 0.9);
  border-radius: 999px;
  overflow: hidden;
}

.wf-fill {
  height: 100%;
  background: linear-gradient(90deg, #38BDF8, #8B5CF6);
  border-radius: 999px;
}

/* FinOps Calculator */
.calc-slider-group {
  margin-bottom: 16px;
}

.calc-slider-header {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 6px;
}

.calc-slider-group input[type="range"] {
  width: 100%;
  accent-color: var(--azure-blue);
  cursor: pointer;
}

.tco-bar-row {
  margin-bottom: 14px;
}

.tco-bar-top {
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  font-weight: 700;
  margin-bottom: 5px;
}

.tco-bar-track {
  height: 16px;
  background: rgba(30, 41, 59, 0.9);
  border-radius: 999px;
  overflow: hidden;
}

.tco-bar-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.25s ease;
}

/* Acoustic & Red-Team Probe Lab */
.probe-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(225px, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.probe-card-btn {
  background: rgba(15, 23, 42, 0.92);
  border: 1px solid rgba(96, 165, 250, 0.28);
  border-radius: 12px;
  padding: 11px 13px;
  text-align: left;
  cursor: pointer;
  transition: all 0.16s ease;
  color: var(--text-primary);
}

.probe-card-btn:hover, .probe-card-btn.active {
  background: rgba(37, 99, 235, 0.22);
  border-color: var(--azure-sky);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.28);
}

.probe-code {
  font-size: 10.5px;
  font-weight: 800;
  color: var(--azure-sky);
  letter-spacing: 0.04em;
  display: flex;
  justify-content: space-between;
  margin-bottom: 4px;
}

.probe-title {
  font-size: 12.5px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 3px;
}

.probe-sub {
  font-size: 11px;
  color: var(--text-muted);
}

.footer {
  margin-top: 60px;
  padding: 28px 0;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
  font-size: 12.5px;
  color: var(--text-muted);
}

@media (max-width: 1080px) {
  .panel-grid-2, .sandbox-3col, .arch-lanes {
    grid-template-columns: 1fr;
  }
}