*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  background-color: var(--c-black);
  background-image:
    radial-gradient(ellipse 60% 40% at 12% 8%, rgba(var(--c-gold-rgb), 0.05), transparent 60%),
    radial-gradient(ellipse 50% 35% at 88% 18%, rgba(var(--c-gold-rgb), 0.035), transparent 60%),
    radial-gradient(ellipse 70% 50% at 50% 100%, rgba(198, 168, 104, 0.04), transparent 65%),
    linear-gradient(180deg, var(--c-black) 0%, var(--c-navy-deep) 50%, var(--c-black) 100%);
  background-attachment: fixed;
  color: var(--c-white);
  font-family: var(--f-sans);
  font-size: var(--fs-body);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/* 金色の粒子(控えめ・ドット状のノイズ) */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(var(--c-gold-rgb), 0.5), transparent 100%),
    radial-gradient(1px 1px at 30% 65%, rgba(var(--c-gold-rgb), 0.4), transparent 100%),
    radial-gradient(1.5px 1.5px at 55% 15%, rgba(var(--c-gold-rgb), 0.35), transparent 100%),
    radial-gradient(1px 1px at 72% 80%, rgba(var(--c-gold-rgb), 0.4), transparent 100%),
    radial-gradient(1.5px 1.5px at 88% 40%, rgba(var(--c-gold-rgb), 0.3), transparent 100%),
    radial-gradient(1px 1px at 20% 90%, rgba(var(--c-gold-rgb), 0.3), transparent 100%),
    radial-gradient(1px 1px at 95% 70%, rgba(var(--c-gold-rgb), 0.35), transparent 100%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

@media (prefers-reduced-motion: no-preference) {
  body::before {
    animation: particleDrift 40s ease-in-out infinite alternate;
  }
}

@keyframes particleDrift {
  from { transform: translateY(0); }
  to { transform: translateY(-18px); }
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

h1,
h2,
h3 {
  font-family: var(--f-serif);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.01em;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-md);
}

/* 高級感のあるゴールドグラデーション文字(強調箇所で使用) */
.text-gold-gradient {
  background: linear-gradient(100deg, var(--c-gold-deep) 0%, var(--c-gold-light) 45%, var(--c-gold) 75%, var(--c-gold-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--c-gold-light);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--f-num);
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--c-gold);
}

.section {
  padding: var(--sp-2xl) 0;
  position: relative;
}

.section-head {
  margin-bottom: var(--sp-lg);
  max-width: 640px;
}

.section-head h2 {
  margin-top: var(--sp-sm);
}

.section-lead {
  margin-top: var(--sp-sm);
  color: var(--c-gray);
  font-size: var(--fs-body);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 3px;
}