/* ============================================================
   基础层：重置、排版、氛围质感、编排入场、可访问性与动效降级
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, p, ul, ol, figure {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

button:disabled,
input:disabled {
  cursor: not-allowed;
}

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

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

[hidden] {
  display: none !important;
}

/* --- 氛围层：极淡的渐变网格 + 纸纹颗粒，替代纯色平铺 --- */
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(58rem 38rem at 8% -12%, rgba(184, 55, 15, 0.11), transparent 62%),
    radial-gradient(46rem 34rem at 100% 4%, rgba(44, 99, 73, 0.09), transparent 60%),
    radial-gradient(40rem 40rem at 50% 110%, rgba(138, 100, 32, 0.07), transparent 62%);
}

.grain {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* 内容统一抬到氛围层之上 */
.shell,
.masthead,
.ticket,
.page-footer,
.admin-shell {
  position: relative;
  z-index: 1;
}

/* --- 通用小组件 --- */
.kicker {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.rule {
  height: 1px;
  background: var(--color-line-strong);
}

/* --- 一次编排好的入场序列（5 组，JS 写入 90ms 错峰） --- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
  transition:
    opacity var(--dur-base) var(--ease-out),
    transform var(--dur-base) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

/* 滚动触发的区块复用同一套过渡 */
.scroll-reveal {
  opacity: 0;
  transform: translateY(18px);
}

.scroll-reveal.is-in {
  opacity: 1;
  transform: none;
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}

@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;
  }
  .reveal,
  .scroll-reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}