:root {
  --cardboard-50: #FBF7F2;
  --cardboard-100: #F3EADF;
  --cardboard-200: #E6D4BC;
  --cardboard-300: #D4B896;
  --cardboard-400: #C29B78;
  --cardboard-500: #B08968;
  --cardboard-600: #9C7555;
  --cardboard-700: #7F5539;
  --cardboard-800: #5E3E27;
  --cardboard-900: #3D2817;
  --accent-orange: #E8A87C;
  --accent-warm: #D4845A;
  --success: #7CB28C;
  --danger: #C8746A;
  --bg: #FBF7F2;
  --surface: #FFFFFF;
  --text: #2C1810;
  --text-muted: #7F5539;
  --text-light: #A68A74;
  --border: #E6D4BC;
  --border-light: #F3EADF;
  --shadow-sm: 0 2px 8px rgba(127, 85, 57, 0.06);
  --shadow-md: 0 4px 16px rgba(127, 85, 57, 0.08);
  --shadow-lg: 0 8px 32px rgba(127, 85, 57, 0.12);
  --shadow-xl: 0 16px 48px rgba(127, 85, 57, 0.16);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

.page-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-light);
}

.brand { display: flex; align-items: center; gap: 14px; }
.brand-logo { width: 48px; height: 48px; border-radius: 12px; object-fit: contain; display: block; }
.brand h1 { margin: 0; font-size: 20px; color: var(--cardboard-800); font-weight: 700; }
.brand p { margin: 2px 0 0; color: var(--text-muted); font-size: 13px; }

.nav { display: flex; gap: 8px; }
.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 14px;
  transition: all 0.2s ease;
}
.nav-link.active { color: var(--cardboard-700); background: var(--cardboard-100); }
.nav-link:hover { color: var(--cardboard-700); background: var(--cardboard-100); }

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  padding: 80px 0 96px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--cardboard-100);
  color: var(--cardboard-700);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.tag-dot { width: 6px; height: 6px; background: var(--accent-warm); border-radius: 50%; }

.hero-left h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  color: var(--cardboard-900);
}

.highlight {
  background: linear-gradient(120deg, var(--accent-orange) 0%, var(--cardboard-500) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-left > p {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 480px;
}

.hero-actions { display: flex; gap: 16px; margin-bottom: 48px; flex-wrap: wrap; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  font-size: 15px;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

.button-primary {
  background: linear-gradient(135deg, var(--cardboard-500) 0%, var(--cardboard-700) 100%);
  color: #fff;
  box-shadow: 0 4px 14px rgba(127, 85, 57, 0.3);
}
.button-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(127, 85, 57, 0.4); }

.button-secondary {
  background: var(--surface);
  color: var(--cardboard-700);
  border: 2px solid var(--border);
}
.button-secondary:hover { border-color: var(--cardboard-500); background: var(--cardboard-50); }

.button-outline { background: transparent; color: var(--cardboard-600); border: 2px solid var(--cardboard-300); }
.button-outline:hover { background: var(--cardboard-100); color: var(--cardboard-700); }
.button-lg { padding: 16px 32px; font-size: 16px; }

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--border-light);
}

.stat { display: flex; flex-direction: column; }
.stat-num { font-size: 32px; font-weight: 800; color: var(--cardboard-700); line-height: 1; }
.stat-unit { font-size: 20px; color: var(--accent-warm); margin-left: 2px; }
.stat-label { font-size: 13px; color: var(--text-muted); margin-top: 6px; }
.stat-divider { width: 1px; height: 40px; background: var(--border); }

/* Phone Mockup */
.hero-right { position: relative; display: flex; justify-content: center; align-items: flex-start; padding-top: 20px; }

.phone-frame {
  width: 300px;
  height: 600px;
  background: var(--cardboard-900);
  border-radius: 42px;
  padding: 12px;
  box-shadow: var(--shadow-xl), inset 0 0 0 2px rgba(255,255,255,0.1);
  position: relative;
}

.phone-notch {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 24px;
  background: var(--cardboard-900);
  border-radius: 0 0 16px 16px;
  z-index: 10;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--cardboard-50);
  border-radius: 32px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.mini-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 44px 16px 12px;
}
.mini-title { font-size: 16px; font-weight: 700; color: var(--cardboard-800); }
.mini-nav-dots { font-size: 14px; color: var(--text-muted); letter-spacing: 2px; }

.mini-search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  margin: 0 16px;
  background: var(--surface);
  border-radius: 10px;
  font-size: 12px;
  color: var(--text-light);
  border: 1px solid var(--border-light);
}

.mini-tabs { display: flex; gap: 6px; padding: 12px 16px; overflow-x: auto; }
.mini-tab { padding: 5px 12px; font-size: 12px; border-radius: 8px; color: var(--text-muted); white-space: nowrap; background: var(--surface); }
.mini-tab.active { background: var(--cardboard-500); color: #fff; font-weight: 600; }

.mini-list { flex: 1; overflow-y: auto; padding: 0 12px; }

.mini-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  background: var(--surface);
  border-radius: 10px;
  margin-bottom: 8px;
  border: 1px solid var(--border-light);
}

.item-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.item-info { flex: 1; min-width: 0; }
.item-name { display: block; font-size: 13px; font-weight: 600; color: var(--cardboard-800); margin-bottom: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.item-spec { font-size: 11px; color: var(--text-light); }

.item-qty { display: flex; flex-direction: column; align-items: flex-end; flex-shrink: 0; }
.qty-num { font-size: 16px; font-weight: 700; color: var(--cardboard-700); line-height: 1; }
.qty-label { font-size: 10px; color: var(--text-light); margin-top: 2px; }
.highlight-qty .qty-num { color: var(--danger); }
.highlight-qty .qty-label { color: var(--danger); }

.mini-scan-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px;
  margin: 12px 16px 20px;
  background: linear-gradient(135deg, var(--cardboard-500), var(--cardboard-700));
  color: #fff;
  border-radius: 12px;
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 4px 14px rgba(127, 85, 57, 0.3);
}

/* Floating Cards */
.floating-card {
  position: absolute;
  background: var(--surface);
  border-radius: 14px;
  padding: 14px 16px;
  box-shadow: var(--shadow-lg);
  display: flex;
  gap: 12px;
  align-items: flex-start;
  min-width: 180px;
  animation: float 4s ease-in-out infinite;
}

.fc-icon { font-size: 22px; line-height: 1; flex-shrink: 0; }
.fc-content { flex: 1; min-width: 0; }
.fc-title { display: block; font-size: 12px; color: var(--text-muted); font-weight: 600; margin-bottom: 4px; }
.fc-bar { height: 6px; background: linear-gradient(90deg, var(--cardboard-400), var(--cardboard-600)); border-radius: 3px; margin-bottom: 4px; }
.fc-text { font-size: 11px; color: var(--text-light); }
.fc-value { font-size: 16px; font-weight: 700; color: var(--danger); }

.card-1 { top: 40px; left: -20px; animation-delay: 0s; }
.card-2 { bottom: 80px; right: -30px; animation-delay: 2s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* Section Headers */
.section-header { text-align: center; max-width: 600px; margin: 0 auto 56px; }

.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--cardboard-100);
  color: var(--cardboard-700);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  color: var(--cardboard-900);
  margin-bottom: 12px;
}

.section-header p { font-size: 16px; color: var(--text-muted); line-height: 1.7; }

/* Pain Points */
.pain-section { padding: 80px 0; background: var(--cardboard-100); border-radius: var(--radius-xl); margin-bottom: 0; }

.pain-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; padding: 0 32px; }

.pain-card {
  background: var(--surface);
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.pain-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--border); }

.pain-icon {
  width: 64px; height: 64px; margin: 0 auto 20px;
  background: var(--cardboard-50); border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  color: var(--cardboard-600);
}

.pain-card h3 { font-size: 18px; font-weight: 700; color: var(--cardboard-800); margin-bottom: 12px; }
.pain-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* Features */
.features { padding: 96px 0; }

.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }

.feature-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.feature-card:hover { box-shadow: var(--shadow-lg); border-color: var(--border); transform: translateY(-2px); }
.feature-card--large { grid-column: span 2; }

.feature-visual { padding: 32px; display: flex; align-items: center; justify-content: center; min-height: 220px; }
.feature-visual--scan { background: linear-gradient(135deg, var(--cardboard-100) 0%, var(--cardboard-200) 100%); }

.barcode-scan { position: relative; width: 220px; height: 140px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 20px; }

.scan-line {
  position: absolute; top: 0; left: 10%; right: 10%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-warm), transparent);
  animation: scan 2s ease-in-out infinite;
  box-shadow: 0 0 12px rgba(212, 132, 90, 0.6);
}

@keyframes scan { 0%, 100% { top: 10%; } 50% { top: 85%; } }

.barcode { display: flex; align-items: flex-end; gap: 2px; height: 50px; }
.barcode span { display: block; height: 100%; background: var(--cardboard-800); border-radius: 1px; }

.feature-visual--data { background: linear-gradient(135deg, var(--cardboard-50) 0%, var(--cardboard-100) 100%); }

.import-flow { display: flex; align-items: center; gap: 12px; }
.import-step {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 14px; background: var(--surface); border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm); font-size: 12px; font-weight: 600; color: var(--cardboard-700);
}
.import-icon { font-size: 24px; }
.import-arrow { font-size: 20px; color: var(--cardboard-400); font-weight: 700; }

.feature-visual--report { background: linear-gradient(135deg, var(--cardboard-100) 0%, var(--accent-orange) 100%); }

.report-mockup { width: 240px; background: var(--surface); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-md); }

.report-header { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; background: var(--cardboard-700); color: #fff; font-size: 14px; font-weight: 700; }
.report-status { font-size: 11px; padding: 3px 8px; background: var(--success, #7CB28C); border-radius: 6px; font-weight: 600; }
.report-body { padding: 8px 0; }
.report-row { display: flex; justify-content: space-between; padding: 8px 16px; font-size: 13px; color: var(--text); border-bottom: 1px solid var(--border-light); }
.report-row:last-child { border-bottom: none; }
.diff-up { color: var(--success, #7CB28C); font-weight: 700; }
.diff-down { color: var(--danger); font-weight: 700; }
.report-footer { padding: 10px 16px; background: var(--cardboard-50); font-size: 11px; color: var(--text-muted); text-align: center; font-weight: 600; }

.feature-content { padding: 28px 32px 32px; }
.feature-badge { display: inline-block; padding: 3px 10px; background: var(--cardboard-100); color: var(--cardboard-700); border-radius: 6px; font-size: 11px; font-weight: 700; letter-spacing: 0.5px; margin-bottom: 14px; }
.feature-content h3 { font-size: 20px; font-weight: 800; color: var(--cardboard-800); margin-bottom: 10px; }
.feature-content > p { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; }

.feature-list { list-style: none; padding: 0; margin: 0; }
.feature-list li { font-size: 13px; color: var(--cardboard-700); padding: 6px 0; display: flex; align-items: center; gap: 8px; }

/* Scenarios */
.scenario-section { padding: 96px 0; background: linear-gradient(180deg, var(--cardboard-50) 0%, var(--bg) 100%); }

.scenario-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }

.scenario-card { background: var(--surface); border-radius: var(--radius-xl); overflow: hidden; border: 1px solid var(--border-light); transition: all 0.3s ease; }
.scenario-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }

.scenario-img { position: relative; height: 180px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.scenario-img--warehouse { background: linear-gradient(135deg, #D4B896 0%, #B08968 100%); }
.scenario-img--retail { background: linear-gradient(135deg, #E6D4BC 0%, #C29B78 100%); }
.scenario-img--ecommerce { background: linear-gradient(135deg, #E8A87C 0%, #D4845A 100%); }
.scenario-img--food { background: linear-gradient(135deg, #F3EADF 0%, #D4B896 100%); }

.img-placeholder { display: flex; flex-direction: column; align-items: center; gap: 8px; color: rgba(255,255,255,0.9); }
.img-caption { position: absolute; bottom: 8px; left: 50%; transform: translateX(-50%); font-size: 10px; color: rgba(255,255,255,0.8); background: rgba(0,0,0,0.15); padding: 2px 8px; border-radius: 4px; white-space: nowrap; }

.scenario-body { padding: 24px; }
.scenario-emoji { font-size: 24px; display: block; margin-bottom: 8px; }
.scenario-body h3 { font-size: 18px; font-weight: 700; color: var(--cardboard-800); margin-bottom: 8px; }
.scenario-body p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* Workflow */
.workflow-section { padding: 96px 0; }

.workflow-steps { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }

.wf-step { flex: 1; min-width: 200px; max-width: 280px; text-align: center; position: relative; }

.wf-number {
  position: absolute; top: -10px; left: 50%; transform: translateX(-50%);
  width: 32px; height: 32px; background: var(--cardboard-700); color: #fff; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 14px; z-index: 2;
}

.wf-icon { width: 80px; height: 80px; margin: 0 auto 20px; background: var(--cardboard-100); border-radius: 24px; display: flex; align-items: center; justify-content: center; color: var(--cardboard-700); }
.wf-step h3 { font-size: 18px; font-weight: 700; color: var(--cardboard-800); margin-bottom: 8px; }
.wf-step p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

.wf-connector { width: 60px; height: 2px; background: linear-gradient(90deg, var(--cardboard-300), var(--cardboard-500)); border-radius: 1px; position: relative; margin-bottom: 40px; }
.wf-connector::after { content: '→'; position: absolute; right: -4px; top: 50%; transform: translateY(-50%); color: var(--cardboard-500); font-weight: 700; font-size: 18px; }

/* CTA */
.cta-section { padding: 64px 0 96px; }

.cta-card {
  background: linear-gradient(135deg, var(--cardboard-700) 0%, var(--cardboard-900) 100%);
  border-radius: var(--radius-xl);
  padding: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
}

.cta-left h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); font-weight: 800; color: #fff; margin-bottom: 8px; }
.cta-left p { font-size: 16px; color: rgba(255,255,255,0.8); }

.cta-right { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }

.cta-qrcode {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin-left: 8px;
}

.cta-qrcode img {
  width: 96px;
  height: 96px;
  border-radius: 12px;
  background: #fff;
  padding: 6px;
}

.cta-card .button-primary { background: var(--accent-orange); color: var(--cardboard-900); box-shadow: 0 4px 14px rgba(232, 168, 124, 0.4); }
.cta-card .button-primary:hover { background: var(--accent-warm); }
.cta-card .button-outline { color: #fff; border-color: rgba(255,255,255,0.4); }
.cta-card .button-outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; }

/* Footer */
.footer { border-top: 1px solid var(--border-light); padding: 40px 0 32px; }

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

.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-logo { width: 40px; height: 40px; border-radius: 10px; }
.footer-brand h4 { font-size: 16px; font-weight: 700; color: var(--cardboard-800); }
.footer-brand p { font-size: 12px; color: var(--text-muted); }

.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--text-muted); text-decoration: none; font-size: 14px; transition: color 0.2s; }
.footer-links a:hover { color: var(--cardboard-700); }

.footer-bottom { text-align: center; padding-top: 24px; border-top: 1px solid var(--border-light); }
.footer-bottom p { color: var(--text-light); font-size: 13px; }
.footer-icp { margin-top: 4px; }
.footer-icp a { color: var(--text-light); font-size: 12px; text-decoration: none; transition: color 0.2s; }
.footer-icp a:hover { color: var(--cardboard-700); }

/* Usage Page */
.usage-main { padding: 48px 0; display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

.section-card { background: var(--surface); padding: 28px; border-radius: var(--radius-lg); border: 1px solid var(--border-light); transition: all 0.3s ease; }
.section-card:hover { box-shadow: var(--shadow-md); border-color: var(--border); transform: translateY(-2px); }
.section-card h2 { font-size: 18px; font-weight: 700; color: var(--cardboard-800); margin-bottom: 8px; }
.section-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }
.section-card ul { margin: 0; padding-left: 20px; color: var(--text-muted); line-height: 1.8; font-size: 14px; }

/* Responsive */
@media (max-width: 1024px) {
  .hero { grid-template-columns: 1fr; gap: 64px; padding: 64px 0 80px; }
  .hero-right { padding-top: 0; }
  .phone-frame { width: 280px; height: 560px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card--large { grid-column: span 1; }
  .pain-grid { padding: 0 24px; }
  .wf-connector { display: none; }
}

@media (max-width: 640px) {
  .page-shell { padding: 0 20px; }
  .header { padding: 16px 0; }
  .brand h1 { font-size: 18px; }
  .brand p { font-size: 12px; }
  .nav-link { padding: 6px 12px; font-size: 13px; }
  .hero { padding: 40px 0 56px; gap: 40px; }
  .hero-left h2 { font-size: 1.75rem; }
  .hero-stats { gap: 20px; flex-wrap: wrap; }
  .stat-num { font-size: 26px; }
  .stat-divider { height: 1px; width: 40px; }
  .phone-frame { width: 260px; height: 520px; }
  .floating-card { min-width: 140px; padding: 10px 12px; }
  .card-1 { left: -10px; }
  .card-2 { right: -10px; }
  .pain-section { padding: 56px 0; border-radius: var(--radius-lg); }
  .pain-grid { grid-template-columns: 1fr; padding: 0 20px; }
  .features { padding: 56px 0; }
  .feature-content { padding: 20px 24px 24px; }
  .feature-visual { padding: 24px 20px; min-height: 180px; }
  .scenario-section { padding: 56px 0; }
  .workflow-section { padding: 56px 0; }
  .cta-section { padding: 32px 0 56px; }
  .cta-card { padding: 32px; flex-direction: column; text-align: center; gap: 24px; }
  .cta-right { justify-content: center; }
  .footer-content { flex-direction: column; text-align: center; }
}