/* 现代化 Reset（全站统一） */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; background: var(--bg-0); }
body {
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-ui);
  font-size: var(--fs-md);
  line-height: 1.6;
  color: var(--tx-1);
  background: var(--bg-0);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, video, canvas { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
button { background: none; border: none; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
::selection { background: rgba(0, 229, 255, 0.28); }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(0,229,255,.25), rgba(139,92,246,.25));
  border-radius: var(--r-full);
  border: 2px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, rgba(0,229,255,.5), rgba(139,92,246,.5));
  background-clip: padding-box;
  border: 2px solid transparent;
}

/* 焦点可达性 */
:focus-visible { outline: 2px solid var(--neon-cyan); outline-offset: 2px; border-radius: var(--r-sm); }