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

html {
  scroll-behavior: smooth;
}

main {
  max-width: 100%;
  overflow-x: hidden;
  overflow-x: clip;
}

body {
  margin: 0;
  font-family: var(--exn-font-body);
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--exn-text);
  background-color: var(--exn-bg);
  background-image:
    linear-gradient(rgba(12, 18, 28, 0.92), rgba(5, 6, 8, 0.97)),
    linear-gradient(90deg, rgba(250, 204, 21, 0.04) 1px, transparent 1px),
    linear-gradient(180deg, rgba(250, 204, 21, 0.04) 1px, transparent 1px),
    radial-gradient(ellipse 90% 65% at 50% -25%, rgba(250, 204, 21, 0.14), transparent 52%);
  background-size:
    auto,
    48px 48px,
    48px 48px,
    auto;
  -webkit-font-smoothing: antialiased;
}

body.exn-no-grid-bg {
  background-image: linear-gradient(rgba(12, 18, 28, 0.96), rgba(5, 6, 8, 0.99)), radial-gradient(ellipse 80% 50% at 70% 0%, rgba(34, 211, 238, 0.06), transparent 50%);
}

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

a {
  color: var(--exn-amber-hot);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--exn-chalk);
}

:focus-visible {
  outline: 2px solid var(--exn-ring);
  outline-offset: 2px;
}

.exn-container {
  width: var(--exn-container);
  max-width: 100%;
  margin-inline: auto;
  min-width: 0;
}

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

h1,
h2,
h3 {
  font-family: var(--exn-font-display);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.12;
  margin: 0 0 var(--exn-space-md);
  color: var(--exn-chalk);
  text-transform: none;
}

h1 {
  font-size: clamp(1.75rem, 4.5vw, 2.85rem);
}

h2 {
  font-size: clamp(1.35rem, 2.8vw, 1.85rem);
}

h3 {
  font-size: 1.12rem;
  letter-spacing: 0.02em;
}

p {
  margin: 0 0 var(--exn-space-md);
}

ul,
ol {
  margin: 0 0 var(--exn-space-md);
  padding-left: 1.35rem;
}

.exn-section {
  padding-block: var(--exn-space-2xl);
  scroll-margin-top: 8.5rem;
}

.exn-section--tight {
  padding-block: var(--exn-space-xl);
}

.exn-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--exn-font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--exn-amber);
  margin-bottom: var(--exn-space-sm);
  padding: 0.35rem 0.7rem;
  border-radius: var(--exn-radius-sm);
  border: 1px solid rgba(250, 204, 21, 0.35);
  background: rgba(250, 204, 21, 0.08);
}

/* 轻微“行情带”动效 — 灵感来自 Launch/Magic 的 beam，纯 CSS */
.exn-ticker-rail {
  overflow: hidden;
  border-block: 1px solid rgba(250, 204, 21, 0.25);
  background: rgba(17, 24, 33, 0.85);
}

.exn-ticker-rail__inner {
  display: flex;
  gap: 3rem;
  padding: 0.45rem 0;
  width: max-content;
  animation: exn-ticker 38s linear infinite;
  font-family: var(--exn-font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  color: var(--exn-muted);
  text-transform: uppercase;
}

@keyframes exn-ticker {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .exn-ticker-rail__inner {
    animation: none;
  }
}

/* 由 JS 切换 body 背景强度 — 增加层次感 */
body.exn-body-aurora {
  background-image:
    radial-gradient(ellipse 100% 80% at 10% 20%, rgba(250, 204, 21, 0.09), transparent 45%),
    radial-gradient(ellipse 70% 55% at 90% 60%, rgba(34, 211, 238, 0.12), transparent 50%),
    linear-gradient(rgba(12, 18, 28, 0.9), rgba(5, 6, 8, 0.97)),
    linear-gradient(90deg, rgba(250, 204, 21, 0.045) 1px, transparent 1px),
    linear-gradient(180deg, rgba(250, 204, 21, 0.045) 1px, transparent 1px);
  background-size: auto, auto, auto, 56px 56px, 56px 56px;
}

body.exn-body-mesh {
  background-image:
    linear-gradient(rgba(8, 12, 18, 0.94), rgba(5, 6, 8, 0.98)),
    url("data:image/svg+xml,%3Csvg width='28' height='28' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill='%23facc15' fill-opacity='0.03' d='M0 0h28v28H0z'/%3E%3Cpath stroke='%2322d3ee' stroke-opacity='0.06' d='M0 14h28M14 0v28'/%3E%3C/svg%3E");
}

body.exn-body-minimal {
  background-image: linear-gradient(180deg, #0a0e14 0%, #050608 100%);
}