body {
  background: #eef2f5;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  font-family: Inter, Arial, sans-serif;
  color: #162d3d;
}

.site-header {
  width: 100%;
  padding: 1.3rem 1.5rem;
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 1px 20px rgba(22, 45, 61, 0.08);
  z-index: 20;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
}

.logo-mark {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: #1f6feb;
  color: #fff;
  font-weight: 700;
  display: grid;
  place-items: center;
  font-size: 1rem;
}

.brand-copy strong {
  display: block;
  font-size: 1rem;
}

.brand-copy span {
  display: block;
  font-size: 0.75rem;
  color: #666;
}

main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.hero {
  display: grid;
  place-items: center;
  text-align: center;
  gap: 2rem;
  padding: 3rem 0 2rem;
}

.hero-copy {
  max-width: 760px;
}

.hero-copy h1 {
  margin: 0;
  font-size: clamp(2.8rem, 4vw, 4.8rem);
  line-height: 1.02;
}

.hero-copy p {
  margin: 1.5rem auto 0;
  max-width: 680px;
  font-size: 1.05rem;
  color: #4f6274;
  line-height: 1.8;
}

.hero-center {
  position: relative;
  width: min(100%, 820px);
  min-height: 740px;
  margin: 0 auto;
}

.center-wallpaper {
  position: absolute;
  inset: 50%;
  transform: translate(-40%, -50%) rotate(-25deg);
  width: 450px;
  height: 450px;
  border-radius: 50%;
  /* overflow: hidden; */
  /* background: linear-gradient(135deg, rgba(31, 111, 235, 0.2), rgba(110, 211, 247, 0.12)); */
  /* background: #fff; */
  display: grid;
  place-items: center;
  z-index: 10;
}

.center-wallpaper img {
  width: 90%;
  height: 90%;
  object-fit: contain;
  object-position: center;
}

.circle-grid {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

/* .circle-grid::before,
.circle-grid::after {
  content: "";
  position: absolute;
  background-repeat: repeat;
  pointer-events: none;
}

.circle-grid::before {
  left: 50%;
  top: calc(1.5rem + 150px);
  transform: translateX(-50%);
  width: 2px;
  height: calc(100% - 303px);
  background-image: radial-gradient(circle, rgba(22, 45, 61, 0.45) 2px, transparent 2px);
  background-size: 8px 8px;
}

.circle-grid::after {
  top: 50%;
  left: calc(1.5rem + 195px);
  transform: translateY(-50%);
  width: calc(100% - 303px);
  height: 2px;
  background-image: radial-gradient(circle, rgba(22, 45, 61, 0.45) 2px, transparent 2px);
  background-size: 8px 8px;
} */

.circle-item {
  position: absolute;
  width: 195px;
  height: 150px;
  background: rgba(255, 255, 255, 0.75);
  border-radius: 24px;
  box-shadow: 0 20px 45px rgba(22, 45, 61, 0.08);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 1rem;
  color: #162d3d;
  border: 1px solid rgba(22, 45, 61, 0.08);
  pointer-events: auto;
}

.item1 { top: 1.5rem; left: calc(50% - 97.5px); }
.item2 { top: calc(50% - 75px); right: 1.5rem; }
.item3 { bottom: 1.5rem; right: calc(50% - 97.5px); }
.item4 { top: calc(50% - 75px); left: 1.5rem; }

.site-footer {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  border-top: 1px solid rgba(22, 45, 61, 0.08);
  color: #5a6d80;
  display: grid;
  gap: 0.75rem;
  text-align: center;
  font-size: 0.95rem;
}

.site-footer a {
  color: inherit;
  text-decoration: underline;
}

@media (min-width: 768px) {
  .site-footer {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    text-align: left;
  }

  .site-footer div:first-child {
    grid-column: 1 / span 2;
    font-weight: 600;
    color: #213247;
  }
}

@media (max-width: 768px) {
  .hero-center {
    width: 100%;
    min-height: auto;
    height: auto;
  }

  .center-wallpaper,
  .circle-grid {
    position: static;
    transform: none;
    width: auto;
    height: auto;
    margin: 0 auto;
  }

  .center-wallpaper {
    width: 100%;
    max-width: 360px;
    height: 360px;
    margin: 0 auto;
  }

  .circle-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    max-width: 520px;
    padding-top: 1rem;
  }

  .circle-item {
    position: static;
    width: 100%;
    min-height: 120px;
    border-radius: 22px;
  }
}