:root {
  --orange: #FF6B35;
  --orange-light: #FF8C42;
  --orange-pale: #FFF0EB;
  --bg: #FFFFFF;
  --bg-warm: #FAFAF8;
  --text: #1A1A1A;
  --text-secondary: #666666;
  --text-muted: #999999;
  --border: #EEEEEE;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 16px rgba(0,0,0,0.06);
  --shadow-hover: 0 8px 32px rgba(0,0,0,0.1);
  --max-width: 960px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--orange);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Navigation */
nav {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--text);
  cursor: pointer;
  padding: 4px 8px;
}

.logo {
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
  letter-spacing: -0.3px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.logo-img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  object-fit: cover;
}

.logo span {
  color: var(--orange);
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--orange);
  text-decoration: none;
}

/* Hero */
.hero {
  padding: 80px 24px 64px;
  text-align: center;
  background: var(--bg-warm);
}

.hero-inner {
  max-width: 680px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero h1 .highlight {
  color: var(--orange);
}

.hero p {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--orange);
  color: white;
}

.btn-primary:hover {
  background: var(--orange-light);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

.btn-outline {
  background: transparent;
  color: var(--orange);
  border: 1.5px solid var(--orange);
  margin-left: 12px;
}

.btn-outline:hover {
  background: var(--orange-pale);
  text-decoration: none;
}

.btn-full {
  display: block;
  width: 100%;
  margin-left: 0;
  margin-right: 0;
}

@media (min-width: 641px) {
  .btn-full {
    max-width: 480px;
    margin-left: auto !important;
    margin-right: auto !important;
  }
}

/* Sections */
.section {
  padding: 64px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
  text-align: center;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 48px;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all 0.25s;
}

.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
  border-color: var(--orange-pale);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--orange-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 20px;
}

.card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Products */
.product-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  transition: all 0.25s;
}

.product-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--orange-pale);
}

.product-card .tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--orange-pale);
  color: var(--orange);
  font-size: 13px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 16px;
}

.product-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.product-card .desc {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
}

.product-card .features {
  list-style: none;
  margin-bottom: 24px;
}

.product-card .features li {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
}

.product-card .features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--orange);
  font-weight: 700;
}

.product-card .cta {
  font-size: 14px;
  font-weight: 600;
  color: var(--orange);
}

/* Survey */
.survey-form {
  max-width: 640px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 32px;
}

.form-group label {
  display: block;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
}

.form-group .hint {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-weight: 400;
}

.options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.option {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
}

.option:hover {
  border-color: var(--orange-light);
  background: var(--orange-pale);
}

.option input {
  margin-right: 10px;
  accent-color: var(--orange);
}

.option-text {
  font-size: 15px;
}

.radar-container {
  max-width: 480px;
  margin: 48px auto;
  text-align: center;
}

.radar-container canvas {
  max-width: 100%;
}

.result-box {
  background: var(--orange-pale);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  margin-top: 32px;
}

.result-box h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.result-box p {
  color: var(--text-secondary);
  font-size: 15px;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

/* Responsive */
@media (max-width: 640px) {
  .hero h1 {
    font-size: 28px;
  }
  .section {
    padding: 48px 24px;
  }
  .nav-inner {
    height: 56px;
    padding: 0 16px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .menu-toggle {
    display: block;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 16px;
    right: 16px;
    flex-direction: column;
    gap: 0;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-hover);
    padding: 8px 0;
    z-index: 99;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links li {
    padding: 0;
  }
  .nav-links a {
    display: block;
    padding: 12px 20px;
    font-size: 15px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links li:last-child a {
    border-bottom: none;
  }
  .logo {
    font-size: 16px;
  }
  .logo-img {
    width: 28px;
    height: 28px;
  }
  .btn-outline {
    margin-left: 0;
    margin-top: 12px;
  }
}