:root {
  --ink: #1a2332;
  --ink-soft: #3d4a5c;
  --mist: #e8eef2;
  --paper: #f7f9fb;
  --jade: #1f6b5c;
  --jade-deep: #155246;
  --line: rgba(26, 35, 50, 0.12);
  --font-display: "Shippori Mincho", "Noto Serif SC", "Songti SC", serif;
  --font-body: "Manrope", "Noto Sans SC", "PingFang SC", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--jade-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--jade);
}

.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem clamp(1.25rem, 4vw, 3rem);
}

.brand-mark {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink);
  text-decoration: none;
}

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
  position: relative;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 0;
  height: 1px;
  background: var(--jade);
  transition: width 0.35s ease;
}

.nav a:hover::after,
.nav a[aria-current="page"]::after {
  width: 100%;
}

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: end;
  overflow: hidden;
  padding: 7rem clamp(1.25rem, 4vw, 3rem) 4rem;
  background:
    radial-gradient(ellipse 80% 60% at 85% 15%, rgba(31, 107, 92, 0.18), transparent 55%),
    linear-gradient(155deg, #dfe8ee 0%, #f4f7f9 42%, #e4ebe7 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.45'/%3E%3C/svg%3E");
  opacity: 0.07;
  pointer-events: none;
}

.hero-copy {
  position: relative;
  max-width: 38rem;
}

.hero-brand {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 10vw, 5.5rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: 0.12em;
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.9s ease forwards 0.15s;
}

.hero-lead {
  margin: 0 0 0.75rem;
  font-size: clamp(1.2rem, 2.5vw, 1.55rem);
  font-weight: 600;
  color: var(--ink);
  opacity: 0;
  transform: translateY(14px);
  animation: rise 0.85s ease forwards 0.35s;
}

.hero-support {
  margin: 0 0 2rem;
  max-width: 28rem;
  color: var(--ink-soft);
  opacity: 0;
  transform: translateY(14px);
  animation: rise 0.85s ease forwards 0.5s;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  opacity: 0;
  transform: translateY(14px);
  animation: rise 0.85s ease forwards 0.65s;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  border-radius: 2px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--ink);
  color: #f7f9fb;
}

.btn-primary:hover {
  background: var(--jade-deep);
  color: #f7f9fb;
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn-ghost:hover {
  border-color: var(--jade);
  color: var(--jade-deep);
}

.section {
  padding: 4.5rem clamp(1.25rem, 4vw, 3rem);
}

.section-narrow {
  max-width: 44rem;
  margin: 0 auto;
}

.section h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.section p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

.product-block {
  border-top: 1px solid var(--line);
  padding-top: 2rem;
  margin-top: 2rem;
}

.product-name {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
  font-weight: 700;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem clamp(1.25rem, 4vw, 3rem) 2.5rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.site-footer strong {
  color: var(--ink);
  font-weight: 600;
}

.page-main {
  padding: 6.5rem clamp(1.25rem, 4vw, 3rem) 4rem;
  max-width: 46rem;
  margin: 0 auto;
}

.page-main h1 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  letter-spacing: 0.06em;
}

.page-meta {
  margin: 0 0 2rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.prose h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.2rem;
}

.prose h3 {
  margin: 1.4rem 0 0.5rem;
  font-size: 1.05rem;
}

.prose p,
.prose li {
  color: var(--ink-soft);
}

.prose ul {
  padding-left: 1.2rem;
}

.prose li {
  margin-bottom: 0.35rem;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}

.contact-list li {
  margin-bottom: 0.85rem;
}

.contact-list span {
  display: block;
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin-bottom: 0.15rem;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 640px) {
  .nav {
    gap: 1rem;
  }

  .hero {
    align-items: center;
    padding-top: 6rem;
  }
}