:root {
  --ink: #111318;
  --muted: #5e6673;
  --line: #d9dee7;
  --paper: #f8fafc;
  --white: #ffffff;
  --red: #d72f2b;
  --blue: #0b8fb6;
  --deep: #17222c;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 14px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  min-width: 290px;
}

.brand img {
  width: 58px;
  height: 52px;
  object-fit: contain;
}

.brand strong {
  display: block;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.04rem;
  letter-spacing: 0;
  white-space: nowrap;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
}

nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--deep);
  font-size: 0.92rem;
}

nav a {
  text-decoration: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: end;
  min-height: 640px;
  padding: clamp(56px, 9vw, 116px) clamp(20px, 5vw, 72px) clamp(48px, 7vw, 86px);
  background:
    linear-gradient(rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.9)),
    url("assets/business-card.png") center / cover no-repeat;
}

.hero-copy {
  max-width: 810px;
  min-width: 0;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1,
h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

h1 {
  max-width: 840px;
  margin-bottom: 22px;
  font-size: clamp(2.7rem, 6vw, 5.9rem);
}

h2 {
  margin-bottom: 0;
  font-size: clamp(2rem, 4vw, 3.8rem);
}

h3 {
  margin-bottom: 12px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.45rem;
  letter-spacing: 0;
}

.lead {
  max-width: 680px;
  color: #34404f;
  font-size: clamp(1.06rem, 1.5vw, 1.25rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
  border: 1px solid var(--deep);
  border-radius: 4px;
  font-weight: 700;
  text-decoration: none;
}

.button.primary {
  border-color: var(--red);
  background: var(--red);
  color: var(--white);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.8);
  color: var(--deep);
}

.trust-panel {
  display: grid;
  gap: 0;
  min-width: 0;
  border: 1px solid rgba(23, 34, 44, 0.2);
  background: rgba(255, 255, 255, 0.86);
}

.trust-panel span {
  padding: 18px 20px;
  border-bottom: 1px solid rgba(23, 34, 44, 0.14);
  color: var(--deep);
  font-weight: 700;
}

.trust-panel span:last-child {
  border-bottom: 0;
}

.section,
.company-section,
.contact-section,
.quality-band {
  padding: clamp(50px, 7vw, 96px) clamp(20px, 5vw, 72px);
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.7fr);
  gap: 34px;
  align-items: end;
  background: var(--white);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.intro > p {
  max-width: 560px;
  color: var(--muted);
  font-size: 1.05rem;
}

.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}

.product-feature {
  display: grid;
  grid-template-columns: minmax(300px, 0.9fr) minmax(320px, 1fr);
  gap: clamp(28px, 5vw, 68px);
  align-items: center;
  padding: clamp(38px, 6vw, 76px) clamp(20px, 5vw, 72px);
  background: #f2f5f9;
  border-bottom: 1px solid var(--line);
}

.product-feature-alt {
  background: #eef1f7;
}

.product-feature-reverse {
  background: var(--white);
}

.product-image {
  background: var(--white);
}

.product-image img {
  display: block;
  width: 100%;
  height: auto;
}

.product-detail {
  max-width: 780px;
}

.product-detail h3 {
  margin-bottom: 22px;
  color: #073f78;
  font-size: clamp(2rem, 3.8vw, 3.6rem);
}

.feature-copy {
  margin-bottom: 34px;
  padding-left: 24px;
  border-left: 1px solid #bfc8d6;
  color: #5f6670;
  font-size: clamp(1.05rem, 1.8vw, 1.45rem);
}

.series-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 24px;
  color: #073f78;
  font-size: 1.08rem;
  font-weight: 700;
}

.series-list span::before {
  content: ">";
  margin-right: 12px;
}

.series-list.compact {
  grid-template-columns: 1fr;
  max-width: 520px;
}

.series-showcase {
  margin-top: 34px;
}

.series-showcase article {
  display: grid;
  grid-template-columns: minmax(180px, 0.45fr) minmax(220px, 0.55fr);
  gap: 22px;
  align-items: center;
  padding: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.74);
}

.series-showcase img {
  display: block;
  width: 100%;
  height: auto;
  background: var(--white);
}

.series-showcase span {
  display: block;
  margin-bottom: 8px;
  color: #073f78;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.45rem;
  font-weight: 700;
}

.series-showcase p {
  margin-bottom: 0;
  color: var(--muted);
}

.product-card {
  min-height: 280px;
  padding: 34px;
  background: var(--white);
}

.product-mark {
  display: block;
  margin-bottom: 42px;
  color: var(--red);
  font-weight: 700;
}

.product-card p,
.company-copy p,
.contact-section p {
  color: var(--muted);
}

.quality-band {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(300px, 1fr);
  gap: 42px;
  align-items: start;
  background: var(--deep);
  color: var(--white);
}

.quality-band .eyebrow {
  color: #7fd0e6;
}

.quality-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.quality-list span {
  min-height: 64px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #edf6fa;
}

.company-section {
  display: grid;
  grid-template-columns: minmax(0, 0.55fr) minmax(300px, 0.95fr);
  gap: clamp(32px, 6vw, 90px);
  background: var(--white);
}

.company-copy {
  max-width: 820px;
  font-size: 1.02rem;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(300px, 0.85fr);
  gap: 36px;
  align-items: start;
  border-top: 1px solid var(--line);
  background: #eef4f7;
}

.contact-list {
  display: grid;
  gap: 10px;
}

.contact-list a {
  display: block;
  padding: 15px 16px;
  border: 1px solid rgba(23, 34, 44, 0.14);
  background: rgba(255, 255, 255, 0.76);
  color: var(--deep);
  text-decoration: none;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px clamp(20px, 5vw, 72px);
  background: #0d1117;
  color: #dce4ec;
  font-size: 0.9rem;
}

@media (max-width: 820px) {
  .site-header,
  nav,
  footer {
    align-items: flex-start;
  }

  .site-header,
  footer {
    flex-direction: column;
  }

  nav {
    width: 100%;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .brand {
    min-width: 0;
  }

  .brand strong {
    white-space: normal;
  }

  .hero,
  .intro,
  .quality-band,
  .company-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .product-grid,
  .quality-list,
  .product-feature,
  .series-list,
  .series-showcase article {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(2.25rem, 11vw, 3.4rem);
  }
}