* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", Arial, sans-serif;
  color: #1f2933;
  background: #f7f8fa;
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  background: linear-gradient(135deg, #f5f7fb 0%, #ffffff 55%, #eef2f7 100%);
}

.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  gap: 18px;
  font-size: 15px;
  color: #4b5563;
}

.nav-links a:hover {
  color: #111827;
}

.hero {
  max-width: 1080px;
  margin: 0 auto;
  padding: 72px 20px 96px;
}

.hero-content {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 10px;
  color: #6b7280;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1.4px;
  font-weight: 700;
}

h1, h2, h3, p {
  margin-top: 0;
}

h1 {
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.05;
  margin-bottom: 20px;
}

h2 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
  margin-bottom: 12px;
}

h3 {
  font-size: 24px;
  margin-bottom: 8px;
}

.hero-text {
  font-size: 19px;
  color: #4b5563;
  max-width: 620px;
}

.hero-actions {
  margin-top: 30px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 20px;
  border-radius: 999px;
  font-weight: 700;
  border: 1px solid #111827;
}

.btn.primary {
  background: #111827;
  color: white;
}

.btn.secondary {
  background: white;
  color: #111827;
}

.section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 72px 20px;
}

.section-title {
  max-width: 720px;
  margin-bottom: 32px;
}

.section-title p {
  color: #6b7280;
}

.product-grid {
  display: grid;
  gap: 24px;
}

.product-card {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.06);
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.1fr);
}

.product-image {
  min-height: 320px;
  background: #e5e7eb;
}

.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #6b7280;
  font-weight: 700;
  letter-spacing: 1px;
}

.product-info {
  padding: 34px;
}

.product-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  border-bottom: 1px solid #e5e7eb;
  padding-bottom: 18px;
  margin-bottom: 20px;
}

.price {
  font-size: 26px;
  font-weight: 900;
  color: #111827;
  white-space: nowrap;
}

.spec-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0 0 20px;
}

.spec-list div {
  background: #f9fafb;
  border-radius: 16px;
  padding: 14px;
}

dt {
  font-size: 13px;
  color: #6b7280;
  font-weight: 700;
}

dd {
  margin: 4px 0 0;
  font-weight: 800;
}

.product-desc {
  color: #4b5563;
}

.text-link {
  display: inline-block;
  margin-top: 10px;
  font-weight: 900;
  color: #111827;
}

.alt {
  max-width: none;
  background: #111827;
  color: white;
}

.content-card {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

.content-card p {
  max-width: 760px;
  color: #d1d5db;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.contact-card {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 20px;
  padding: 22px;
  min-height: 140px;
}

.label {
  display: block;
  color: #6b7280;
  font-size: 14px;
  margin-bottom: 8px;
  font-weight: 700;
}

.contact-card a,
.contact-card p {
  font-size: 18px;
  font-weight: 800;
  margin: 0;
}

footer {
  text-align: center;
  padding: 28px 20px;
  color: #6b7280;
  background: white;
  border-top: 1px solid #e5e7eb;
}

@media (max-width: 760px) {
  .nav {
    align-items: flex-start;
    gap: 14px;
    flex-direction: column;
  }

  .nav-links {
    flex-wrap: wrap;
  }

  .hero {
    padding-top: 46px;
    padding-bottom: 64px;
  }

  .product-card {
    grid-template-columns: 1fr;
  }

  .product-image {
    min-height: 230px;
  }

  .product-top {
    flex-direction: column;
  }

  .spec-list,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 54px 20px;
  }
}