* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f3f3f3;
  color: #1b1b1b;
  line-height: 1.6;
}

.container {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  background: #ffffff;
  border-bottom: 1px solid #e4e4e4;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 22px 0;
  flex-wrap: wrap;
}

.logo {
  font-size: 2.4rem;
  font-weight: 700;
  color: #4d7df0;
}

.tagline {
  font-size: 1.1rem;
  color: #333333;
}

.hero {
  padding: 48px 0 56px;
}

.hero h1 {
  margin: 0 0 28px;
  text-align: center;
  font-size: 3.6rem;
  line-height: 1.1;
  color: #0d1b4c;
}

.hero-image-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 34px;
}

.hero-image {
  width: 100%;
  max-width: 780px;
  height: auto;
  display: block;
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.intro-text {
  max-width: 860px;
  margin: 0 auto;
  font-size: 1.15rem;
  text-align: left;
}

.intro-text p {
  margin: 0 0 18px;
}

.site-footer {
  border-top: 1px solid #dddddd;
  background: #f8f8f8;
  padding: 28px 0 36px;
  text-align: center;
  font-size: 0.95rem;
  color: #555555;
}

.footer-links {
  margin: 16px 0 10px;
}

.copyright {
  margin: 0;
}

@media (max-width: 768px) {
  .header-inner {
    justify-content: center;
    text-align: center;
  }

  .logo {
    font-size: 2rem;
  }

  .tagline {
    width: 100%;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .intro-text {
    font-size: 1.05rem;
  }
}