/* ==========================================================================
   FlashFox (闪狐机场) - Cellular Biology & CRISPR Gene Dark-Field Theme
   ========================================================================== */

:root {
  /* Dark-Field Optical Microscopy Palette */
  --bg-void: #03080d;
  --bg-stage: #061019;
  --bg-membrane: rgba(9, 24, 36, 0.68);
  --bg-membrane-hover: rgba(13, 35, 52, 0.84);
  --bg-membrane-solid: #091824;

  /* Fluorescent Protein Markers */
  --gfp-primary: #18f2a4;     /* GFP Green - Active Transport & Healthy Gene */
  --gfp-dim: rgba(24, 242, 164, 0.14);
  --dapi-cyan: #00d2ff;       /* DAPI Cyan - Optical Reticle & Data Stream */
  --dapi-dim: rgba(0, 210, 255, 0.14);
  --rfp-coral: #ff4d7d;       /* RFP Coral - Antigen / Contamination Alert */
  --rfp-dim: rgba(255, 77, 125, 0.15);
  --amber-stain: #f5b749;     /* Luciferase Amber */

  /* Text Hierarchy */
  --text-primary: #eaf7f5;
  --text-secondary: #98b4c4;
  --text-muted: #5f7d8f;

  /* Borders & Glows */
  --border-membrane: rgba(24, 242, 164, 0.18);
  --border-cyan: rgba(0, 210, 255, 0.22);
  --border-subtle: rgba(152, 180, 196, 0.12);
  --glow-gfp: 0 0 28px rgba(24, 242, 164, 0.24);
  --glow-cyan: 0 0 28px rgba(0, 210, 255, 0.22);

  /* Layout & Typography */
  --font-sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --container-max: 1220px;
  --radius-cell: 20px;
  --radius-pill: 999px;
  --transition: 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-void);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #071928 0%, #03080d 62%);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition), border-color var(--transition), transform var(--transition);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

/* ==========================================================================
   Dynamic Optical Canvas & Microscope Reticle Overlay
   ========================================================================== */
#microscopy-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.optical-vignette {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 45%, transparent 35%, rgba(3, 8, 13, 0.65) 85%, rgba(2, 5, 9, 0.92) 100%),
    linear-gradient(180deg, rgba(3, 8, 13, 0.35) 0%, transparent 18%, transparent 82%, rgba(3, 8, 13, 0.8) 100%);
}

.microscope-grid {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.16;
  background-image:
    linear-gradient(to right, rgba(0, 210, 255, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 210, 255, 0.08) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 50% 40%, black 20%, transparent 78%);
}

.site-shell {
  position: relative;
  z-index: 2;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Top Navigation Bar
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(3, 10, 16, 0.76);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 74px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(24, 242, 164, 0.2), rgba(0, 210, 255, 0.18));
  border: 1px solid rgba(24, 242, 164, 0.45);
  box-shadow: var(--glow-gfp);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--gfp-primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

.nav-link {
  padding: 8px 13px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--gfp-primary);
  background: rgba(24, 242, 164, 0.09);
}

.nav-link-kb {
  color: var(--dapi-cyan);
  border: 1px solid rgba(0, 210, 255, 0.24);
  background: rgba(0, 210, 255, 0.07);
}

.nav-link-kb:hover {
  color: #fff;
  background: rgba(0, 210, 255, 0.2);
  border-color: var(--dapi-cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  place-items: center;
  color: var(--text-primary);
}

/* ==========================================================================
   Buttons & Pills
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-size: 0.94rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-sm {
  padding: 9px 18px;
  font-size: 0.85rem;
}

.btn-primary {
  background: linear-gradient(135deg, #18f2a4 0%, #00d2ff 100%);
  color: #031318;
  box-shadow: 0 8px 26px rgba(24, 242, 164, 0.28);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 34px rgba(24, 242, 164, 0.44);
}

.btn-membrane {
  background: rgba(9, 26, 39, 0.8);
  border: 1px solid var(--border-cyan);
  color: var(--text-primary);
  backdrop-filter: blur(12px);
}

.btn-membrane:hover {
  border-color: var(--gfp-primary);
  color: var(--gfp-primary);
  background: rgba(24, 242, 164, 0.08);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--gfp-primary);
  background: var(--gfp-dim);
  border: 1px solid rgba(24, 242, 164, 0.3);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gfp-primary);
  box-shadow: 0 0 12px var(--gfp-primary);
  animation: bioPulse 2s infinite ease-in-out;
}

@keyframes bioPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.35); opacity: 0.55; }
}

/* ==========================================================================
   Section Framing
   ========================================================================== */
.section {
  padding: 96px 0;
  position: relative;
}

.section-header {
  max-width: 760px;
  margin-bottom: 48px;
}

.section-header.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-title {
  margin-top: 14px;
  font-size: clamp(1.85rem, 3.2vw, 2.65rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.section-desc {
  margin-top: 14px;
  font-size: 1.04rem;
  color: var(--text-secondary);
}

.gradient-bio {
  background: linear-gradient(120deg, #eaf7f5 0%, #18f2a4 48%, #00d2ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ==========================================================================
   Cellular Membrane Card Primitive
   ========================================================================== */
.cell-card {
  position: relative;
  background: var(--bg-membrane);
  border: 1px solid var(--border-membrane);
  border-radius: var(--radius-cell);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 18px 42px rgba(0, 0, 0, 0.36);
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.cell-card:hover {
  border-color: rgba(24, 242, 164, 0.44);
  background: var(--bg-membrane-hover);
}

/* ==========================================================================
   Hero Section & CRISPR Gene Purity Detector
   ========================================================================== */
.hero {
  padding: 72px 0 88px;
}

.hero-telemetry-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 18px;
  margin-bottom: 34px;
  border-radius: var(--radius-pill);
  background: rgba(7, 20, 31, 0.72);
  border: 1px solid var(--border-cyan);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-secondary);
}

.hero-telemetry-bar span strong {
  color: var(--gfp-primary);
  font-weight: 600;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 38px;
  align-items: center;
}

.hero-title {
  margin-top: 18px;
  font-size: clamp(2.15rem, 4.1vw, 3.4rem);
  font-weight: 850;
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.hero-slogan {
  margin-top: 18px;
  padding: 14px 18px;
  border-left: 3px solid var(--gfp-primary);
  background: linear-gradient(90deg, rgba(24, 242, 164, 0.1), transparent);
  border-radius: 0 12px 12px 0;
  font-size: 1.08rem;
  font-weight: 600;
  color: #e4fff6;
}

.hero-lead {
  margin-top: 16px;
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 600px;
}

.hero-cta-row {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-badges {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.hero-badge {
  padding: 14px;
  border-radius: 14px;
  background: rgba(8, 22, 33, 0.65);
  border: 1px solid var(--border-subtle);
}

.hero-badge-val {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gfp-primary);
}

.hero-badge-label {
  margin-top: 4px;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* CRISPR Detector Panel */
.crispr-panel {
  padding: 26px;
  overflow: hidden;
}

.crispr-panel::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 190px;
  height: 190px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(24, 242, 164, 0.22), transparent 70%);
  pointer-events: none;
}

.crispr-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.crispr-title {
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.crispr-status-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--rfp-dim);
  color: var(--rfp-coral);
  border: 1px solid rgba(255, 77, 125, 0.35);
}

.crispr-status-tag.purified {
  background: var(--gfp-dim);
  color: var(--gfp-primary);
  border-color: rgba(24, 242, 164, 0.4);
}

.crispr-score-ring-wrap {
  display: flex;
  align-items: center;
  gap: 22px;
  margin: 22px 0;
}

.crispr-ring {
  position: relative;
  width: 118px;
  height: 118px;
  flex-shrink: 0;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(var(--rfp-coral) calc(var(--score, 42) * 1%), rgba(255, 255, 255, 0.08) 0);
  transition: all 0.6s ease;
}

.crispr-ring.purified {
  background: conic-gradient(var(--gfp-primary) calc(var(--score, 99.8) * 1%), rgba(255, 255, 255, 0.08) 0);
  box-shadow: var(--glow-gfp);
}

.crispr-ring-inner {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: #05111a;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.crispr-score-num {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 800;
  line-height: 1;
}

.crispr-score-unit {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.crispr-diagnosis h4 {
  font-size: 0.98rem;
  margin-bottom: 6px;
}

.crispr-diagnosis p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.gene-sequence-box {
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(2, 8, 13, 0.78);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  margin-bottom: 16px;
}

.gene-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
}

.gene-row + .gene-row {
  border-top: 1px dashed rgba(152, 180, 196, 0.1);
}

.gene-bad { color: var(--rfp-coral); }
.gene-good { color: var(--gfp-primary); }
.gene-cyan { color: var(--dapi-cyan); }

.crispr-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* ==========================================================================
   Section 3: Node Latency & Status Telemetry
   ========================================================================== */
.telemetry-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-tab {
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(8, 22, 33, 0.7);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition);
}

.filter-tab:hover,
.filter-tab.active {
  color: #031318;
  background: var(--gfp-primary);
  border-color: var(--gfp-primary);
  font-weight: 600;
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.node-card {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.node-card.hidden {
  display: none;
}

.node-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.node-name {
  font-size: 1rem;
  font-weight: 700;
}

.node-route {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--dapi-cyan);
  margin-top: 3px;
}

.latency-pill {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--gfp-dim);
  color: var(--gfp-primary);
  border: 1px solid rgba(24, 242, 164, 0.32);
}

.node-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(2, 8, 13, 0.55);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.74rem;
}

.node-metric-label {
  color: var(--text-muted);
  display: block;
  font-size: 0.66rem;
}

.node-metric-val {
  color: var(--text-primary);
  font-weight: 600;
}

.node-unlocks {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.unlock-chip {
  font-size: 0.72rem;
  padding: 3px 9px;
  border-radius: 8px;
  background: rgba(0, 210, 255, 0.09);
  color: #bceeff;
  border: 1px solid rgba(0, 210, 255, 0.18);
}

/* ==========================================================================
   Section 4A: Pricing Plans
   ========================================================================== */
.billing-switch-wrap {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  border-radius: var(--radius-pill);
  background: rgba(7, 20, 31, 0.85);
  border: 1px solid var(--border-subtle);
  margin-bottom: 34px;
}

.billing-btn {
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.billing-btn.active {
  background: linear-gradient(135deg, #18f2a4, #00d2ff);
  color: #031318;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.plan-card {
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
}

.plan-card.featured {
  border-color: rgba(24, 242, 164, 0.65);
  box-shadow: 0 0 40px rgba(24, 242, 164, 0.14);
  background: linear-gradient(180deg, rgba(13, 39, 54, 0.88), rgba(7, 20, 30, 0.84));
}

.plan-badge {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--dapi-dim);
  color: var(--dapi-cyan);
  border: 1px solid rgba(0, 210, 255, 0.28);
  margin-bottom: 12px;
}

.plan-card.featured .plan-badge {
  background: var(--gfp-dim);
  color: var(--gfp-primary);
  border-color: rgba(24, 242, 164, 0.42);
}

.plan-name {
  font-size: 1.22rem;
  font-weight: 700;
}

.plan-sub {
  font-size: 0.84rem;
  color: var(--text-secondary);
  margin-top: 4px;
  min-height: 42px;
}

.plan-price-row {
  margin: 18px 0 20px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.plan-price {
  font-family: var(--font-mono);
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-primary);
}

.plan-period {
  font-size: 0.84rem;
  color: var(--text-muted);
}

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  flex: 1;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.plan-features li::before {
  content: "◈";
  color: var(--gfp-primary);
  font-size: 0.8rem;
  margin-top: 2px;
}

/* ==========================================================================
   Section 4B: Core Advantages (Biological Metaphors)
   ========================================================================== */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.adv-card {
  padding: 28px;
}

.adv-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(24, 242, 164, 0.16), rgba(0, 210, 255, 0.14));
  border: 1px solid rgba(24, 242, 164, 0.35);
  color: var(--gfp-primary);
  font-family: var(--font-mono);
  font-weight: 700;
  margin-bottom: 18px;
}

.adv-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.adv-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.adv-meta {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--dapi-cyan);
}

/* ==========================================================================
   Section 5: FAQ & Standalone KB Entry Banner
   ========================================================================== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  border-radius: 16px;
  background: var(--bg-membrane);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item.open {
  border-color: rgba(24, 242, 164, 0.42);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  font-size: 1.02rem;
  font-weight: 600;
}

.faq-icon {
  font-family: var(--font-mono);
  color: var(--gfp-primary);
  font-size: 1.2rem;
  transition: transform var(--transition);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.32s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 0.94rem;
  color: var(--text-secondary);
}

.kb-redirect-banner {
  margin-top: 38px;
  padding: 26px 30px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  border-color: rgba(0, 210, 255, 0.34);
}

/* ==========================================================================
   Section 6: User Reviews
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.review-card {
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
}

.review-quote {
  font-size: 0.94rem;
  color: var(--text-primary);
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

.review-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  background: linear-gradient(135deg, rgba(24, 242, 164, 0.25), rgba(0, 210, 255, 0.25));
  border: 1px solid rgba(24, 242, 164, 0.4);
  color: var(--gfp-primary);
}

.review-name {
  font-size: 0.92rem;
  font-weight: 700;
}

.review-role {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Knowledge Base Hub & Article Pages
   ========================================================================== */
.kb-hero {
  padding: 64px 0 42px;
}

.kb-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.kb-search {
  min-width: 280px;
  flex: 1;
  max-width: 420px;
  padding: 12px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-cyan);
  background: rgba(6, 17, 26, 0.85);
  color: var(--text-primary);
  font-size: 0.92rem;
  outline: none;
}

.kb-search:focus {
  border-color: var(--gfp-primary);
  box-shadow: var(--glow-gfp);
}

.kb-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.kb-card {
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
}

.kb-card.hidden {
  display: none;
}

.kb-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--dapi-cyan);
}

.kb-card h2 {
  font-size: 1.22rem;
  line-height: 1.35;
}

.kb-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.kb-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.kb-tag {
  font-size: 0.74rem;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--gfp-dim);
  color: var(--gfp-primary);
  border: 1px solid rgba(24, 242, 164, 0.25);
}

/* Article Layout */
.article-wrap {
  padding: 48px 0 90px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumb a:hover {
  color: var(--gfp-primary);
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 290px;
  gap: 32px;
  align-items: start;
}

.article-body {
  padding: 38px 40px;
}

.article-body h1 {
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  line-height: 1.25;
  margin: 14px 0 18px;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 20px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.article-content h2 {
  font-size: 1.38rem;
  margin: 34px 0 14px;
  color: var(--gfp-primary);
  scroll-margin-top: 96px;
}

.article-content h3 {
  font-size: 1.12rem;
  margin: 22px 0 10px;
  color: var(--dapi-cyan);
}

.article-content p {
  margin-bottom: 16px;
  color: #cfe0ea;
  font-size: 1rem;
  line-height: 1.82;
}

.article-content ul,
.article-content ol {
  margin: 14px 0 20px 20px;
  color: #cfe0ea;
}

.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }

.article-content li {
  margin-bottom: 8px;
  line-height: 1.75;
}

.article-callout {
  margin: 24px 0;
  padding: 18px 22px;
  border-radius: 14px;
  background: rgba(24, 242, 164, 0.08);
  border-left: 3px solid var(--gfp-primary);
  font-size: 0.94rem;
  color: #e4fff6;
}

.article-code {
  margin: 18px 0 24px;
  padding: 16px 20px;
  border-radius: 12px;
  background: #02080d;
  border: 1px solid var(--border-cyan);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #b7f6ff;
  overflow-x: auto;
  line-height: 1.6;
}

.article-sidebar {
  position: sticky;
  top: 96px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.sidebar-box {
  padding: 22px;
}

.sidebar-box h3 {
  font-size: 0.95rem;
  margin-bottom: 12px;
  color: var(--gfp-primary);
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-list a {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.toc-list a:hover {
  color: var(--gfp-primary);
}

.article-nav-links {
  margin-top: 38px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  border-top: 1px solid var(--border-subtle);
  background: rgba(2, 7, 12, 0.88);
  padding: 48px 0 36px;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--gfp-primary);
}

.footer-copy {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(152, 180, 196, 0.08);
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1080px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .node-grid,
  .adv-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
}

@media (max-width: 920px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    background: rgba(3, 10, 16, 0.96);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px 24px 28px;
    border-bottom: 1px solid var(--border-cyan);
    display: none;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-toggle {
    display: grid;
  }
  .kb-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 68px 0;
  }
  .hero-badges,
  .pricing-grid,
  .node-grid,
  .adv-grid,
  .reviews-grid,
  .crispr-actions {
    grid-template-columns: 1fr;
  }
  .article-body {
    padding: 24px 20px;
  }
}