/*
 * OneAsk (一问多答) — Modern Tech & Utility Design System
 * Clean, High-Contrast Developer Tool Styling (Obsidian & Zinc)
 */

:root {
  /* Surfaces & Canvas */
  --bg-main: #ffffff;
  --bg-subtle: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #fcfcfd;
  --bg-zinc-50: #f8fafc;
  --bg-zinc-100: #f1f5f9;
  --bg-zinc-200: #e2e8f0;
  
  --bg-dark: #09090b;
  --bg-dark-surface: #121215;
  --bg-dark-card: #18181b;

  /* Typography */
  --text-primary: #09090b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-faint: #94a3b8;
  --text-on-dark: #f8fafc;
  --text-muted-dark: #94a3b8;

  /* Primary Brand Tech Accent (Electric Blue & Dark Zinc) */
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --primary-border: #bfdbfe;

  --accent-cyan: #0284c7;
  --accent-purple: #7c3aed;
  --accent-emerald: #059669;

  /* Semantic Highlighting */
  --diff-yellow: rgba(234, 179, 8, 0.18);
  --diff-yellow-border: #eab308;
  --diff-yellow-text: #854d0e;
  
  --match-green: rgba(34, 197, 94, 0.14);
  --match-green-border: #22c55e;
  --match-green-text: #15803d;

  /* Borders & Dividers */
  --border-light: #e2e8f0;
  --border-subtle: #f1f5f9;
  --border-dark: #27272a;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-workbench: 0 25px 50px -12px rgba(15, 23, 42, 0.15), 0 0 0 1px rgba(15, 23, 42, 0.08);

  /* Fonts */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-main);
  color: var(--text-primary);
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--bg-main);
  color: var(--text-primary);
  overflow-x: hidden;
}

/* Subtle background grid pattern */
.bg-grid-pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 800px;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.08) 0%, transparent 60%),
    linear-gradient(to right, rgba(0, 0, 0, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
  background-size: 100% 100%, 48px 48px, 48px 48px;
  mask-image: linear-gradient(to bottom, black 40%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 40%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

/* Container */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Top Notification Banner */
.top-banner {
  background: var(--bg-zinc-100);
  border-bottom: 1px solid var(--border-light);
  padding: 8px 0;
  font-size: 12.5px;
  color: var(--text-secondary);
}
.top-banner-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.top-banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-main);
  border: 1px solid var(--border-light);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--primary);
}
.top-banner-links {
  display: flex;
  align-items: center;
  gap: 16px;
}
.top-banner-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}
.top-banner-links a:hover {
  color: var(--primary);
}

/* Sticky Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: all 0.2s ease;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand-logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}
.brand-logo-img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  box-shadow: var(--shadow-sm);
}
.brand-name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.brand-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-zinc-100);
  color: var(--text-muted);
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
  border: 1px solid var(--border-light);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}
.nav-menu a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s ease;
}
.nav-menu a:hover {
  color: var(--primary);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--text-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: #27272a;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-blue {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.35);
}
.btn-blue:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px 0 rgba(37, 99, 235, 0.45);
}
.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-light);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover {
  background: var(--bg-zinc-50);
  border-color: #cbd5e1;
}
.btn-lg {
  padding: 13px 24px;
  font-size: 15px;
  border-radius: 9px;
}

/* Hero Section */
.hero-section {
  padding: 72px 0 48px;
  text-align: center;
  position: relative;
}
.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-light);
  border: 1px solid var(--primary-border);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 24px;
}
.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.7);
  animation: pulse-ring 2s infinite cubic-bezier(0.66, 0, 0, 1);
}
@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.7); }
  70% { box-shadow: 0 0 0 8px rgba(37, 99, 235, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0); }
}

.hero-headline {
  font-size: clamp(38px, 5.5vw, 64px);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.12;
  color: var(--text-primary);
  max-width: 960px;
  margin: 0 auto 20px;
}
.hero-headline .text-gradient {
  background: linear-gradient(135deg, #2563eb 0%, #0284c7 50%, #7c3aed 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-secondary);
  max-width: 740px;
  margin: 0 auto 36px;
  line-height: 1.65;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

/* Store trust ratings */
.hero-trust-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 48px;
}
.trust-badge-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  text-decoration: none;
  background: var(--bg-zinc-50);
  border: 1px solid var(--border-light);
  padding: 4px 10px;
  border-radius: 6px;
  transition: all 0.15s ease;
}
.trust-badge-item:hover {
  background: #ffffff;
  border-color: var(--primary);
  color: var(--primary);
}
.trust-badge-item img {
  width: 15px;
  height: 15px;
}
.star-icon {
  color: #f59e0b;
}

/* Centerpiece Interactive Workbench Simulator */
.workbench-container {
  max-width: 1160px;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 16px;
  box-shadow: var(--shadow-workbench);
  overflow: hidden;
  text-align: left;
}

.workbench-window-header {
  background: #f8fafc;
  border-bottom: 1px solid var(--border-light);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.window-dots {
  display: flex;
  align-items: center;
  gap: 7px;
}
.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.window-title {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}
.window-status-pill {
  background: #dcfce7;
  color: #166534;
  border: 1px solid #bbf7d0;
  padding: 1px 7px;
  border-radius: 4px;
  font-size: 10.5px;
  font-weight: 600;
}

.workbench-top-bar {
  padding: 16px 20px;
  background: #ffffff;
  border-bottom: 1px solid var(--border-light);
}

.workbench-input-wrapper {
  display: flex;
  align-items: center;
  background: var(--bg-zinc-50);
  border: 1.5px solid var(--border-light);
  border-radius: 10px;
  padding: 8px 14px;
  gap: 12px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.workbench-input-wrapper:focus-within {
  border-color: var(--primary);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}
.search-icon-svg {
  color: var(--text-muted);
  flex-shrink: 0;
}
.workbench-prompt-input {
  flex: 1;
  border: none;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 14.5px;
  color: var(--text-primary);
  outline: none;
}
.workbench-send-btn {
  background: var(--text-primary);
  color: #ffffff;
  border: none;
  padding: 7px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 0.15s ease;
}
.workbench-send-btn:hover {
  background: var(--primary);
}

/* Preset Scenario Tabs */
.workbench-presets-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: #fafafa;
  border-bottom: 1px solid var(--border-light);
  flex-wrap: wrap;
  gap: 10px;
}
.preset-tabs-list {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.preset-tab-btn {
  background: #ffffff;
  border: 1px solid var(--border-light);
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}
.preset-tab-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.preset-tab-btn.is-active {
  background: var(--text-primary);
  color: #ffffff;
  border-color: var(--text-primary);
}

.diff-legend-pills {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11.5px;
  font-family: var(--font-mono);
}
.legend-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 500;
}
.legend-pill.diff-pill {
  background: var(--diff-yellow);
  color: var(--diff-yellow-text);
  border: 1px solid var(--diff-yellow-border);
}
.legend-pill.match-pill {
  background: var(--match-green);
  color: var(--match-green-text);
  border: 1px solid var(--match-green-border);
}

/* 4-Columns Workbench Body */
.workbench-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--border-light);
  gap: 1px;
}

.model-column {
  background: #ffffff;
  display: flex;
  flex-direction: column;
  min-height: 380px;
}
.model-column-header {
  padding: 12px 14px;
  background: #ffffff;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.model-id-badge {
  display: flex;
  align-items: center;
  gap: 8px;
}
.model-id-badge img {
  width: 18px;
  height: 18px;
  border-radius: 4px;
}
.model-id-badge span {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
}
.column-tag {
  font-size: 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  padding: 1px 5px;
  border-radius: 3px;
  background: var(--bg-zinc-100);
  color: var(--text-muted);
}

.model-column-content {
  padding: 16px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
  flex: 1;
}

mark.diff {
  background: var(--diff-yellow);
  color: var(--diff-yellow-text);
  border-bottom: 1.5px solid var(--diff-yellow-border);
  padding: 1px 3px;
  border-radius: 2px;
  font-weight: 600;
}
mark.match {
  background: var(--match-green);
  color: var(--match-green-text);
  border-bottom: 1.5px solid var(--match-green-border);
  padding: 1px 3px;
  border-radius: 2px;
  font-weight: 600;
}

/* Sections General */
.section {
  padding: 96px 0;
  position: relative;
}
.section-subtle {
  background-color: var(--bg-subtle);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-head {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 56px;
}
.section-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
  display: inline-block;
}
.section-title {
  font-size: clamp(28px, 3.8vw, 42px);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 14px;
}
.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Bento Features Grid */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.bento-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 14px;
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
}
.bento-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}
.bento-card.span-2 {
  grid-column: span 2;
}

.bento-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  border: 1px solid var(--primary-border);
}
.bento-icon.purple {
  background: #f5f3ff;
  color: var(--accent-purple);
  border-color: #ddd6fe;
}
.bento-icon.green {
  background: #ecfdf5;
  color: var(--accent-emerald);
  border-color: #a7f3d0;
}
.bento-icon.cyan {
  background: #ecfeff;
  color: var(--accent-cyan);
  border-color: #a5f3fc;
}

.bento-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.015em;
}
.bento-body {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Models Matrix & Interactive Physics Arena */
.physics-stage {
  position: relative;
  width: 100%;
  height: 350px;
  background: radial-gradient(circle at 50% 30%, #ffffff 0%, #f8fafc 100%);
  border: 1.5px solid var(--border-light);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow-workbench);
  user-select: none;
  touch-action: none;
  margin-bottom: 48px;
}

/* Big Transform Bounding Box Banner */
.physics-banner {
  position: absolute;
  top: 24px;
  left: 50%;
  transform: translate(-50%, 0) rotate(-3deg);
  padding: 12px 32px;
  background: #ffffff;
  border: 2px solid #09090b;
  border-radius: 6px;
  box-shadow: 0 16px 32px -8px rgba(15, 23, 42, 0.12);
  cursor: grab;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  will-change: transform;
}
.physics-banner.is-dragging {
  cursor: grabbing;
  box-shadow: 0 22px 45px -8px rgba(15, 23, 42, 0.2);
}

.transform-handle {
  position: absolute;
  width: 6px;
  height: 6px;
  background: #ffffff;
  border: 1.5px solid #09090b;
  border-radius: 1px;
}
.transform-handle.tl { top: -4px; left: -4px; }
.transform-handle.tr { top: -4px; right: -4px; }
.transform-handle.bl { bottom: -4px; left: -4px; }
.transform-handle.br { bottom: -4px; right: -4px; }
.transform-handle.tm { top: -4px; left: 50%; transform: translateX(-50%); }
.transform-handle.bm { bottom: -4px; left: 50%; transform: translateX(-50%); }
.transform-handle.ml { left: -4px; top: 50%; transform: translateY(-50%); }
.transform-handle.mr { right: -4px; top: 50%; transform: translateY(-50%); }

.banner-title-text {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(22px, 3.5vw, 34px);
  letter-spacing: -0.035em;
  color: #09090b;
  text-transform: uppercase;
  line-height: 1.1;
  text-shadow: 0 1px 2px rgba(0,0,0,0.06);
}
.banner-sub-text {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Physics Icon-Only Squircle Chips (Crisp 10 AI Model Icons) */
.physics-chips-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.physics-icon-chip {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: auto;
  width: 68px;
  height: 68px;
  border-radius: 18px;
  background: #ffffff;
  border: 1.5px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 6px 18px -2px rgba(15, 23, 42, 0.12), 0 1px 2px rgba(0,0,0,0.04);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  box-sizing: border-box;
  cursor: grab;
  z-index: 5;
  will-change: transform;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.physics-icon-chip:hover {
  border-color: var(--primary);
  box-shadow: 0 10px 28px -4px rgba(37, 99, 235, 0.25);
}
.physics-icon-chip.is-dragging {
  cursor: grabbing;
  box-shadow: 0 20px 42px -6px rgba(15, 23, 42, 0.28);
  border-color: var(--primary);
  z-index: 30;
}
.physics-icon-chip img {
  width: 100%;
  height: 100%;
  max-width: 44px;
  max-height: 44px;
  object-fit: contain;
  display: block;
  pointer-events: none;
  border-radius: 8px;
}



/* Original Detailed Models Matrix Grid (Retained) */
.models-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.model-card-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 18px 16px;
  text-decoration: none;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}
.model-card-item:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.model-card-top {
  display: flex;
  align-items: center;
  gap: 10px;
}
.model-card-top img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}
.model-card-name {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.model-card-category {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}
.model-card-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}



/* 4-Step Workflow */
.workflow-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.workflow-step-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 24px 20px;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.step-number {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.85;
  margin-bottom: 12px;
}
.step-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.step-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Privacy Dark Banner */
.privacy-dark-card {
  background: var(--bg-dark);
  color: var(--text-on-dark);
  border-radius: 18px;
  padding: 48px;
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
  align-items: center;
  box-shadow: var(--shadow-lg);
}
.privacy-left h3 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}
.privacy-left p {
  font-size: 15px;
  color: var(--text-muted-dark);
  line-height: 1.6;
}
.privacy-pillars-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.pillar-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px;
  border-radius: 10px;
}
.pillar-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
  color: #ffffff;
}
.pillar-desc {
  font-size: 12.5px;
  color: var(--text-muted-dark);
  line-height: 1.55;
}

/* FAQ Accordion */
.faq-container {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border-light);
}
.faq-item summary {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: color 0.15s ease;
}
.faq-item summary:hover {
  color: var(--primary);
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-toggle-icon {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--text-muted);
  transition: transform 0.2s ease;
}
.faq-item[open] .faq-toggle-icon {
  transform: rotate(45deg);
}
.faq-body {
  padding-bottom: 20px;
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Download CTA Section */
.cta-banner-wrap {
  background: linear-gradient(135deg, #09090b 0%, #18181b 100%);
  color: #ffffff;
  border-radius: 20px;
  padding: 64px 32px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.cta-banner-wrap h2 {
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}
.cta-banner-wrap p {
  font-size: 17px;
  color: var(--text-muted-dark);
  max-width: 600px;
  margin: 0 auto 36px;
}
.cta-store-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Footer */
.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--border-light);
  padding: 64px 0 32px;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}
.footer-brand p {
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 320px;
}
.footer-col h5 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  text-decoration: none;
  color: var(--text-secondary);
  transition: color 0.15s ease;
}
.footer-col a:hover {
  color: var(--primary);
}

.footer-bottom-bar {
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

/* Responsive */
@media (max-width: 1080px) {
  .workbench-grid { grid-template-columns: repeat(2, 1fr); }
  .bento-grid { grid-template-columns: repeat(2, 1fr); }
  .bento-card.span-2 { grid-column: span 2; }
  .models-grid { grid-template-columns: repeat(3, 1fr); }
  .workflow-steps-grid { grid-template-columns: repeat(2, 1fr); }
  .privacy-dark-card { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 768px) {
  .nav-menu { display: none; }
  .workbench-grid { grid-template-columns: 1fr; }
  .bento-grid { grid-template-columns: 1fr; }
  .bento-card.span-2 { grid-column: span 1; }
  .models-grid { grid-template-columns: repeat(2, 1fr); }
  .workflow-steps-grid { grid-template-columns: 1fr; }
  .privacy-pillars-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}