/* Exness standalone — header, nav, hero, cards, accordion, footer */
.exn-header-wrap {
  position: sticky;
  top: 0;
  z-index: 80;
  padding: var(--exn-space-sm) var(--exn-space-md) var(--exn-space-md);
  pointer-events: none;
}

.exn-header-wrap > * {
  pointer-events: auto;
}

.exn-header {
  width: 100%;
}

.exn-header__stack {
  width: var(--exn-container);
  max-width: 100%;
  margin-inline: auto;
  background: rgba(11, 15, 20, 0.96);
  border: 1px solid rgba(250, 204, 21, 0.35);
  border-radius: var(--exn-radius-sm);
  box-shadow: var(--exn-shadow), 0 0 60px rgba(250, 204, 21, 0.08);
  backdrop-filter: blur(14px);
  overflow: visible;
}

.exn-header__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--exn-space-sm);
  padding: 0.65rem 1rem;
  border-bottom: 1px solid rgba(34, 211, 238, 0.2);
  background: linear-gradient(180deg, rgba(250, 204, 21, 0.06) 0%, transparent 60%);
  border-radius: var(--exn-radius-sm) var(--exn-radius-sm) 0 0;
}

.exn-header__top-center {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  min-width: 9rem;
}

.exn-header__tagline {
  font-family: var(--exn-font-mono);
  font-size: 0.55rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--exn-muted);
  white-space: nowrap;
}

.exn-header__top-right {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
}

.exn-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--exn-chalk);
  font-family: var(--exn-font-display);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.12em;
}

.exn-logo:hover {
  color: var(--exn-amber);
}

.exn-logo__glyph {
  width: 2.35rem;
  height: 2.35rem;
  border-radius: var(--exn-radius-sm);
  border: 2px solid var(--exn-amber);
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--exn-base);
  background: linear-gradient(145deg, var(--exn-amber-hot), var(--exn-amber-dim));
  box-shadow: 0 0 22px var(--exn-amber-glow);
}

.exn-header__meta {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.exn-lang {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--exn-muted);
  padding: 0.3rem 0.6rem;
  border-radius: var(--exn-radius-pill);
  border: 1px solid var(--exn-edge);
  background: var(--exn-elevated);
}

.exn-badge-18 {
  font-size: 0.55rem;
  font-weight: 800;
  padding: 0.28rem 0.45rem;
  border-radius: var(--exn-radius-sm);
  background: var(--exn-cyan-soft);
  border: 1px solid rgba(34, 211, 238, 0.45);
  color: var(--exn-cyan);
  letter-spacing: 0.12em;
}

.exn-header__actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.exn-nav-toggle {
  display: none;
  width: 2.55rem;
  height: 2.55rem;
  border-radius: var(--exn-radius-sm);
  border: 1px solid var(--exn-edge);
  background: var(--exn-elevated);
  cursor: pointer;
}

.exn-nav-toggle .exn-nav-toggle__bar {
  display: block;
  width: 1rem;
  height: 2px;
  background: var(--exn-chalk);
  margin: 0 auto;
}

.exn-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 0.12rem 0.4rem;
  padding: 0.5rem 1rem 0.65rem;
  background: rgba(5, 6, 8, 0.88);
  border-radius: 0 0 var(--exn-radius-sm) var(--exn-radius-sm);
  border-top: 1px solid rgba(250, 204, 21, 0.12);
}

.exn-nav > a:not(.exn-btn) {
  font-family: var(--exn-font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--exn-muted);
  text-decoration: none;
  padding: 0.38rem 0.65rem;
  border-radius: var(--exn-radius-sm);
  border: 1px solid transparent;
  transition: background var(--exn-transition), color var(--exn-transition);
}

.exn-nav > a:not(.exn-btn):hover {
  color: var(--exn-chalk);
  background: rgba(250, 204, 21, 0.1);
}

.exn-nav > a.is-active:not(.exn-btn) {
  background: var(--exn-amber);
  color: var(--exn-void);
  border-color: var(--exn-amber-dim);
}

.exn-nav > a.exn-btn--primary {
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

.exn-nav__mega {
  position: relative;
  z-index: 0;
}

.exn-nav__mega.is-open {
  z-index: 32;
}

.exn-nav__mega-trigger {
  font-family: var(--exn-font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--exn-muted);
  padding: 0.38rem 0.55rem;
  border-radius: var(--exn-radius-sm);
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
}

.exn-nav__mega-trigger:hover {
  color: var(--exn-chalk);
  background: rgba(250, 204, 21, 0.08);
}

.exn-nav__mega.is-open .exn-nav__mega-trigger {
  background: var(--exn-amber);
  color: var(--exn-void);
}

.exn-nav__mega-panel {
  z-index: 140;
  padding: var(--exn-space-md);
  background: var(--exn-panel);
  border: 1px solid rgba(250, 204, 21, 0.35);
  border-radius: var(--exn-radius);
  box-shadow: var(--exn-shadow);
}

.exn-nav__mega-panel .exn-nav__mega-list a {
  color: var(--exn-chalk);
  font-weight: 600;
  text-decoration: none;
  padding: 0.4rem 0.45rem;
  border-radius: var(--exn-radius-sm);
  display: block;
}

.exn-nav__mega-panel .exn-nav__mega-list a:hover {
  background: rgba(250, 204, 21, 0.12);
  color: var(--exn-amber-hot);
}

.exn-nav__mega-panel .exn-nav__mega-list a.is-active {
  background: var(--exn-amber);
  color: var(--exn-void);
}

.exn-nav__mega-kicker {
  margin: 0 0 0.45rem;
  font-size: 0.55rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--exn-muted);
}

.exn-nav__mega-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.2rem;
}

@media (min-width: 901px) {
  .exn-nav__mega-panel {
    position: absolute;
    top: calc(100% + 0.45rem);
    left: 0;
    min-width: 16rem;
  }

  .exn-nav__mega-list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 900px) {
  .exn-header__top-center {
    display: none;
  }

  .exn-nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .exn-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    padding: var(--exn-space-md) 1rem;
  }

  .exn-nav.is-open {
    display: flex;
  }

  .exn-nav__mega {
    width: 100%;
  }

  .exn-nav__mega-trigger {
    width: 100%;
    justify-content: space-between;
  }

  .exn-nav__mega-panel {
    margin-top: 0.35rem;
  }
}

.exn-read-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 999;
  pointer-events: none;
}

.exn-read-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--exn-cyan), var(--exn-amber));
  transform-origin: left;
  transform: scaleX(0);
}

.exn-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 1.1rem;
  font-family: var(--exn-font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--exn-radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease,
    background 0.15s ease,
    color 0.15s ease;
}

.exn-btn--primary {
  background: linear-gradient(145deg, var(--exn-amber-hot), var(--exn-amber));
  color: var(--exn-void);
  border-color: rgba(0, 0, 0, 0.3);
  box-shadow: 0 4px 28px var(--exn-amber-glow);
}

.exn-btn--primary:hover {
  filter: brightness(1.06);
  transform: translateY(-1px);
  color: var(--exn-void);
}

.exn-btn--ghost {
  background: transparent;
  color: var(--exn-chalk);
  border-color: rgba(248, 250, 252, 0.45);
}

.exn-btn--ghost:hover {
  border-color: var(--exn-amber);
  color: var(--exn-amber);
}

.exn-btn--compact {
  padding: 0.45rem 0.75rem;
  font-size: 0.64rem;
}

.exn-hero {
  padding-block: var(--exn-space-2xl);
}

.exn-hero__grid {
  display: grid;
  gap: var(--exn-space-xl);
  align-items: start;
}

@media (min-width: 960px) {
  .exn-hero__grid {
    grid-template-columns: 1.08fr 0.92fr;
  }
}

.exn-hero__lead {
  font-size: 1.05rem;
  color: var(--exn-muted);
  max-width: 52ch;
}

.exn-hero__lead strong {
  color: var(--exn-chalk);
}

.exn-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--exn-space-sm);
  margin-top: var(--exn-space-lg);
}

.exn-hero__stat-board {
  display: grid;
  gap: 0.65rem;
}

@media (min-width: 520px) {
  .exn-hero__stat-board {
    grid-template-columns: repeat(2, 1fr);
  }
}

.exn-stat {
  background: var(--exn-panel);
  border: 1px solid var(--exn-edge);
  border-radius: var(--exn-radius-sm);
  padding: 0.85rem 1rem;
  position: relative;
  overflow: hidden;
}

.exn-stat::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 40%, rgba(250, 204, 21, 0.08) 50%, transparent 60%);
  background-size: 200% 100%;
  animation: exn-shimmer 5s ease-in-out infinite;
}

@keyframes exn-shimmer {
  0% {
    background-position: 100% 0;
  }
  100% {
    background-position: -100% 0;
  }
}

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

.exn-stat__label {
  position: relative;
  font-family: var(--exn-font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.14em;
  color: var(--exn-muted);
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.exn-stat__value {
  position: relative;
  font-family: var(--exn-font-display);
  font-size: 1.05rem;
  color: var(--exn-amber);
}

.exn-beam-card {
  background: var(--exn-panel);
  border-radius: var(--exn-radius);
  padding: var(--exn-space-lg);
  position: relative;
  border: 1px solid rgba(250, 204, 21, 0.25);
  box-shadow: 0 0 40px rgba(34, 211, 238, 0.06);
}

.exn-prose--dense {
  min-width: 0;
  overflow-wrap: anywhere;
}

.exn-prose--dense p {
  color: var(--exn-muted);
}

.exn-prose--dense h2 {
  margin-top: var(--exn-space-xl);
}

.exn-prose--dense h2:first-child {
  margin-top: 0;
}

.exn-grid-3 {
  display: grid;
  gap: var(--exn-space-lg);
}

@media (min-width: 860px) {
  .exn-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.exn-card {
  background: var(--exn-panel);
  border-radius: var(--exn-radius);
  padding: var(--exn-space-lg);
  border: 1px solid var(--exn-edge);
}

.exn-card:hover {
  border-color: rgba(250, 204, 21, 0.35);
}

.exn-card--accent {
  border-color: rgba(250, 204, 21, 0.45);
  box-shadow: 0 0 32px rgba(250, 204, 21, 0.08);
}

.exn-table-wrap {
  overflow-x: auto;
  margin: var(--exn-space-lg) 0;
}

.exn-data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.exn-data-table caption {
  text-align: left;
  font-family: var(--exn-font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  color: var(--exn-muted);
  text-transform: uppercase;
  margin-bottom: var(--exn-space-sm);
}

.exn-data-table th,
.exn-data-table td {
  border: 1px solid var(--exn-edge);
  padding: 0.65rem 0.85rem;
  text-align: left;
}

.exn-data-table th {
  background: var(--exn-elevated);
  color: var(--exn-chalk);
  font-weight: 600;
}

.exn-accordion {
  border: 1px solid var(--exn-edge);
  border-radius: var(--exn-radius);
  overflow: hidden;
  margin-top: var(--exn-space-lg);
}

.exn-accordion__item + .exn-accordion__item {
  border-top: 1px solid var(--exn-edge);
}

.exn-accordion__trigger {
  width: 100%;
  text-align: left;
  padding: 1rem 1.1rem;
  font-family: var(--exn-font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--exn-chalk);
  background: var(--exn-elevated);
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.exn-accordion__trigger::after {
  content: "+";
  color: var(--exn-amber);
  font-weight: 400;
}

.exn-accordion__item.is-open .exn-accordion__trigger::after {
  content: "−";
}

.exn-accordion__panel {
  padding: 0 1.1rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}

.exn-accordion__item.is-open .exn-accordion__panel {
  max-height: 80rem;
  padding: 0 1.1rem 1.1rem;
}

.exn-tabs {
  margin-top: var(--exn-space-md);
}

.exn-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: var(--exn-space-md);
}

.exn-tabs__tab {
  padding: 0.45rem 0.85rem;
  border-radius: var(--exn-radius-sm);
  border: 1px solid var(--exn-edge);
  background: var(--exn-elevated);
  color: var(--exn-muted);
  font-family: var(--exn-font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
}

.exn-tabs__tab.is-active {
  border-color: var(--exn-amber);
  color: var(--exn-amber);
  background: rgba(250, 204, 21, 0.1);
}

.exn-tabs__panel {
  color: var(--exn-muted);
}

.exn-page-head {
  background: linear-gradient(180deg, rgba(17, 24, 33, 0.95), rgba(5, 6, 8, 0.98));
  padding-block: var(--exn-space-xl);
  border-bottom: 1px solid rgba(250, 204, 21, 0.2);
}

.exn-page-head p {
  max-width: 60ch;
  color: var(--exn-muted);
}

.exn-section--panel {
  background: rgba(17, 24, 33, 0.55);
  border-block: 1px solid rgba(250, 204, 21, 0.12);
}

.exn-footer {
  padding-block: var(--exn-space-xl);
  border-top: 1px solid var(--exn-edge);
  background: rgba(5, 6, 8, 0.96);
}

.exn-footer__cols {
  display: grid;
  gap: var(--exn-space-lg);
}

@media (min-width: 720px) {
  .exn-footer__cols {
    grid-template-columns: 1.2fr 1fr 1fr;
  }
}

.exn-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.exn-footer__list a {
  color: var(--exn-muted);
  text-decoration: none;
  display: inline-block;
  padding: 0.2rem 0;
}

.exn-footer__list a:hover {
  color: var(--exn-amber);
}

.exn-footer__legal {
  margin-top: var(--exn-space-lg);
  padding-top: var(--exn-space-md);
  border-top: 1px dashed var(--exn-edge);
  font-size: 0.82rem;
  color: var(--exn-muted);
}

/* === 分层版面：全宽石板 + 不同底纹 === */
/* 不用 50vw/100vw 做全宽 breakout：有纵向滚动条时 vw 会略大于布局宽度，导致整页横向滚动条 */
.exn-slab {
  position: relative;
  padding-block: var(--exn-space-xl);
  margin-inline: 0;
  padding-inline: 0;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.exn-slab > .exn-container {
  position: relative;
  z-index: 1;
}

.exn-slab--mesh {
  background:
    radial-gradient(ellipse 55% 45% at 100% 0%, rgba(250, 204, 21, 0.07), transparent 55%),
    radial-gradient(ellipse 50% 40% at 0% 100%, rgba(34, 211, 238, 0.08), transparent 55%),
    linear-gradient(180deg, rgba(17, 24, 33, 0.72), rgba(8, 11, 16, 0.92));
  border-block: 1px solid rgba(250, 204, 21, 0.12);
}

.exn-slab--mesh::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='2' cy='2' r='1' fill='%23facc15' fill-opacity='0.11'/%3E%3C/svg%3E");
  opacity: 0.5;
  pointer-events: none;
}

.exn-slab--cyan {
  background: linear-gradient(115deg, rgba(17, 24, 33, 0.9) 0%, rgba(8, 26, 32, 0.95) 45%, rgba(11, 15, 20, 0.92) 100%);
  border-block: 1px solid rgba(34, 211, 238, 0.15);
  box-shadow: inset 0 1px 0 rgba(34, 211, 238, 0.08);
}

.exn-slab--cyan::after {
  content: "";
  position: absolute;
  top: -30%;
  right: -15%;
  width: min(42vw, 380px);
  height: min(42vw, 380px);
  background: radial-gradient(circle, rgba(34, 211, 238, 0.14), transparent 68%);
  pointer-events: none;
}

.exn-slab--noise {
  background: linear-gradient(180deg, rgba(15, 20, 28, 0.88), rgba(7, 9, 12, 0.95));
  border-block: 1px solid rgba(148, 163, 184, 0.12);
}

.exn-slab--noise::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.35'/%3E%3C/svg%3E");
  pointer-events: none;
  mix-blend-mode: overlay;
}

.exn-slab--slant {
  background: linear-gradient(165deg, rgba(22, 30, 44, 0.75) 0%, rgba(9, 11, 15, 0.95) 40%, rgba(17, 24, 33, 0.8) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), 0 100%);
  border-bottom: 2px solid rgba(250, 204, 21, 0.2);
}

.exn-slab--cta {
  background: linear-gradient(90deg, rgba(250, 204, 21, 0.1), transparent 38%, rgba(34, 211, 238, 0.08));
  border-block: 1px solid rgba(250, 204, 21, 0.22);
  padding-block: var(--exn-space-2xl);
}

/* 滚动入场（见 main.js） */
[data-exn-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.55s ease,
    transform 0.55s ease;
}

[data-exn-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  [data-exn-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* 浮动工具条：跳块 + 背景切换 */
.exn-toolbar-floating {
  position: sticky;
  top: 5.5rem;
  z-index: 60;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.85rem;
  margin-bottom: var(--exn-space-lg);
  background: rgba(8, 11, 16, 0.88);
  border: 1px solid rgba(250, 204, 21, 0.22);
  border-radius: var(--exn-radius-sm);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(10px);
}

.exn-toolbar-label {
  font-family: var(--exn-font-mono);
  font-size: 0.52rem;
  letter-spacing: 0.16em;
  color: var(--exn-muted);
  text-transform: uppercase;
  margin-right: 0.25rem;
}

.exn-chipbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
}

.exn-bg-toggle {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.exn-chip {
  font-family: var(--exn-font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 0.65rem;
  border-radius: var(--exn-radius-pill);
  border: 1px solid var(--exn-edge);
  background: var(--exn-elevated);
  color: var(--exn-muted);
  cursor: pointer;
  transition:
    border-color 0.15s ease,
    color 0.15s ease,
    box-shadow 0.15s ease,
    background 0.15s ease;
}

.exn-chip:hover {
  border-color: rgba(250, 204, 21, 0.45);
  color: var(--exn-chalk);
}

.exn-chip.is-active {
  border-color: var(--exn-amber);
  color: var(--exn-void);
  background: linear-gradient(145deg, var(--exn-amber-hot), var(--exn-amber));
  box-shadow: 0 0 20px var(--exn-amber-glow);
}

/* Bento 快捷导航 */
.exn-bento {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: repeat(auto-fill, minmax(min(140px, 100%), 1fr));
  margin-bottom: var(--exn-space-lg);
  min-width: 0;
  max-width: 100%;
}

.exn-bento__tile {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.85rem 1rem;
  border-radius: var(--exn-radius-sm);
  border: 1px solid var(--exn-edge);
  background: rgba(22, 30, 44, 0.55);
  text-decoration: none;
  color: var(--exn-chalk);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

a.exn-bento__tile:hover {
  color: var(--exn-amber-hot);
  border-color: rgba(250, 204, 21, 0.45);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.exn-bento__tile small {
  font-family: var(--exn-font-mono);
  font-size: 0.52rem;
  letter-spacing: 0.12em;
  color: var(--exn-muted);
  text-transform: uppercase;
}

/* 高亮引用块 */
.exn-callout {
  margin: var(--exn-space-lg) 0;
  padding: var(--exn-space-md) var(--exn-space-lg);
  border-radius: var(--exn-radius-sm);
  border: 1px solid rgba(250, 204, 21, 0.25);
  border-left: 4px solid var(--exn-amber);
  background: rgba(250, 204, 21, 0.05);
}

.exn-callout--cyan {
  border-left-color: var(--exn-cyan);
  background: rgba(34, 211, 238, 0.06);
  border-color: rgba(34, 211, 238, 0.2);
}

/* shadcn 风格 details */
.exn-details {
  margin: var(--exn-space-lg) 0;
  border: 1px solid var(--exn-edge);
  border-radius: var(--exn-radius);
  background: var(--exn-panel);
  overflow: hidden;
}

.exn-details summary {
  cursor: pointer;
  list-style: none;
  padding: 0.9rem 1.1rem;
  font-weight: 600;
  color: var(--exn-chalk);
  background: var(--exn-elevated);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.exn-details summary::-webkit-details-marker {
  display: none;
}

.exn-details summary::after {
  content: "▸";
  color: var(--exn-amber);
  transition: transform 0.2s ease;
}

.exn-details[open] summary::after {
  transform: rotate(90deg);
}

.exn-details__body {
  padding: 1rem 1.1rem 1.1rem;
  border-top: 1px solid var(--exn-edge);
  color: var(--exn-muted);
}

/* 分列装饰 */
.exn-split {
  display: grid;
  gap: var(--exn-space-lg);
  margin: var(--exn-space-xl) 0;
  padding: var(--exn-space-lg);
  border-radius: var(--exn-radius);
  border: 1px solid rgba(250, 204, 21, 0.18);
  background: linear-gradient(135deg, rgba(17, 24, 33, 0.55), rgba(8, 11, 16, 0.85));
}

@media (min-width: 780px) {
  .exn-split {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .exn-split__divider {
    display: none;
  }
}

/* 数字统计条（可配合 JS 动效） */
.exn-meter {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.75rem;
  margin: var(--exn-space-lg) 0;
}

.exn-meter__item {
  text-align: center;
  padding: 1rem;
  border-radius: var(--exn-radius-sm);
  border: 1px solid var(--exn-edge);
  background: rgba(5, 6, 8, 0.45);
}

.exn-meter__num {
  font-family: var(--exn-font-display);
  font-size: 1.65rem;
  color: var(--exn-amber);
  line-height: 1;
}

.exn-meter__label {
  font-family: var(--exn-font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.14em;
  color: var(--exn-muted);
  text-transform: uppercase;
  margin-top: 0.35rem;
}

/* 首页 hero 增强噪点层 */
.exn-hero--layered {
  position: relative;
  overflow: hidden;
}

.exn-hero--layered::before {
  content: "";
  position: absolute;
  inset: -2rem 0 -1rem;
  background: radial-gradient(ellipse 70% 60% at 70% 20%, rgba(250, 204, 21, 0.06), transparent 55%);
  pointer-events: none;
  z-index: 0;
}

.exn-hero--layered .exn-hero__grid {
  position: relative;
  z-index: 1;
}

@media (max-width: 900px) {
  .exn-toolbar-floating {
    top: 4.75rem;
  }
}