* {
  font-family: 'Noto Serif JP', serif !important;
  font-size: 20px !important;
  line-height: 2.0 !important;
}
h1 { font-size: 52px !important; font-weight: 700 !important; }
h2 { font-size: 38px !important; font-weight: 700 !important; }
h3 { font-size: 28px !important; font-weight: 700 !important; }
@media (max-width: 600px) {
  * { font-size: 18px !important; }
  h1 { font-size: 36px !important; }
  h2 { font-size: 28px !important; }
}

/* ===========================
   ハンバーガーメニュー
   =========================== */
.site-header { position: relative; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px 4px;
  z-index: 200;
}
.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: white;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
  font-size: 0 !important;
  line-height: 0 !important;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 600px) {
  .nav-toggle { display: flex !important; }
  .site-nav {
    display: none !important;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #0d3b66;
    flex-direction: column !important;
    gap: 0 !important;
    padding: 8px 0;
    box-shadow: 0 4px 16px rgba(0,0,0,0.25);
    z-index: 100;
  }
  .site-nav.open { display: flex !important; }
  .site-nav a {
    padding: 14px 24px !important;
    border-bottom: 1px solid rgba(255,255,255,0.12) !important;
    border-right: none !important;
    font-size: 17px !important;
  }
  .site-nav a:last-child { border-bottom: none !important; }
}