/* ============================================================
   Stratego · 基础层：重置 / 排版 / 焦点 / 降级动效
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--fs-400);
  line-height: 1.65;
  letter-spacing: 0;
  color: var(--color-ink);
  background: var(--color-bg);
  min-height: 100vh;
}

/* 纸张氛围：细横线 + 淡淡的作战地图网格 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    linear-gradient(rgba(74, 82, 64, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 82, 64, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
}

/* 颗粒噪点 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.05;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

main {
  position: relative;
  z-index: 2;
}

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

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

h1, h2, h3 {
  line-height: 1.05;
  letter-spacing: 0.01em;
}

h2 {
  font-family: var(--font-display-cn);
  font-size: var(--fs-800);
  color: var(--color-ink);
}

/* 中文标题辅助：英文小字眉标 */
.kicker {
  font-family: var(--font-mono);
  font-size: var(--fs-300);
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.kicker::before {
  content: "■ ";
  font-size: 0.6em;
  vertical-align: 0.22em;
}

::selection {
  background: var(--color-accent);
  color: var(--color-card);
}

/* 键盘焦点圈 */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* 滚动入场：仅当 JS 可用时才隐藏，保证无脚本环境内容完整可见 */
.js .reveal {
  opacity: 0;
  transform: translateY(26px);
}

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

/* 动效降级 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}