* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: #222;
  background-color: #fff;
  line-height: 1.7;
}
a {
  color: #222;
  text-decoration: none;
  border-bottom: 1px solid #ccc;
}
a:hover {
  border-color: #222;
}
ul {
  list-style: none;
}
.container {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 20px;
}
.header {
  border-bottom: 1px solid #eee;
  position: sticky;
  top: 0;
  background: #fff;
  z-index: 10;
}
.navbar {
  max-width: 700px;
  margin: 0 auto;
  padding: 18px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-weight: 700;
  font-size: 1.1rem;
}
.nav-menu {
  display: flex;
  gap: 24px;
}
.nav-link {
  border: none;
}
.nav-link:hover {
  text-decoration: underline;
}
.hamburger {
  display: none;
  cursor: pointer;
}
.bar {
  display: block;
  width: 24px;
  height: 2px;
  margin: 5px auto;
  background-color: #222;
}
.hero {
  margin: 60px 0;
}
.hero h1 {
  font-size: 2rem;
  margin-bottom: 16px;
}
.section {
  margin-bottom: 70px;
}
.section h2 {
  font-size: 1.4rem;
  margin-bottom: 24px;
  padding-bottom: 6px;
  border-bottom: 1px solid #eee;
}
.post-list {
  display: flex;
  flex-direction: column;
  gap: 26px;
}
.post-item h3 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}
.post-item time {
  font-size: 0.85rem;
  color: #666;
  display: block;
  margin-bottom: 8px;
}
.post-item p {
  color: #444;
}
.contact-list li {
  margin-bottom: 10px;
}
.footer {
  border-top: 1px solid #eee;
  padding: 30px 20px;
  text-align: center;
  color: #666;
  font-size: 0.9rem;
}

@media (max-width: 560px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 60px;
    flex-direction: column;
    background-color: white;
    width: 100%;
    text-align: center;
    transition: 0.3s;
    padding: 20px 0;
    border-bottom: 1px solid #eee;
  }
  .nav-menu.active {
    left: 0;
  }
  .hamburger {
    display: block;
  }
  .hero h1 {
    font-size: 1.7rem;
  }
}