@charset "UTF-8";
/* ===== 導覽列改版（2026-11-03） ===== */
@keyframes tnNavIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@keyframes tnNavRing { 0% { box-shadow: 0 0 0 0 rgba(220,38,38,.55); } 70%,100% { box-shadow: 0 0 0 6px rgba(220,38,38,0); } }
@keyframes tnNavBump { 0% { transform: scale(1); } 40% { transform: scale(1.35); } 100% { transform: scale(1); } }

/* 頂層：滑過時底線由中間展開 */
.nav-menu > li > a { position: relative; }
.nav-menu > li > a::after {
  content: ""; position: absolute; left: 12px; right: 12px; bottom: 1px; height: 2px;
  background: var(--color-primary); border-radius: 2px;
  transform: scaleX(0); transform-origin: center; transition: transform .22s ease;
}
.nav-menu > li > a:hover::after,
.nav-menu > li.is-dropdown-open > a::after { transform: scaleX(1); }
.menu-more-dropdown > li > a::after { display: none; }

/* 下拉淡入 */
.nav-menu > li.is-dropdown-open > .mega-dropdown,
.nav-menu > li.is-dropdown-open > .sub-menu,
.menu-more-toggle.is-open > .menu-more-dropdown { animation: tnNavIn .18s ease-out; }

/* 文章分類大選單 */
.tn-nav-catalog > .mega-dropdown { width: min(920px, 94vw); max-width: none; }
.tn-nav-catalog .mega-left { flex: 0 0 170px; width: 170px; box-sizing: border-box; }
.tn-nav-catalog .mega-left-desc { white-space: normal; }
.tn-nav-catalog .mega-links { flex: 1 1 auto; min-width: 0; }
.tn-nav-catalog .mega-links {
  display: block; column-count: 4; column-gap: 6px; padding: 14px 12px 6px;
}
.tn-nav-catalog .mega-links > li { break-inside: avoid; padding: 0 0 10px; }
.tn-nav-catalog .mega-links > li > a {
  display: flex; align-items: center; gap: 8px; font-weight: 600; white-space: normal;
  color: var(--color-nav-text); padding: 6px 10px;
}
.nav-menu .tn-nav-catalog .mega-links .sub-menu,
html.dark-mode .nav-menu .tn-nav-catalog .mega-links .sub-menu {
  display: block !important; position: static; min-width: 0; margin: 0;
  padding: 0 0 0 36px; background: none; border: 0; border-radius: 0; box-shadow: none; animation: none;
}
.tn-nav-catalog .mega-links .sub-menu li { position: static; }
.nav-menu .tn-nav-catalog .mega-links .sub-menu a {
  padding: 3px 10px; font-size: .8125rem; color: rgba(255,255,255,.55); white-space: nowrap;
}
.tn-nav-catalog .mega-links .sub-menu a:hover { color: var(--color-primary-light, #3cad6e); background: rgba(46,133,85,.12); }
.tn-nav-catalog.is-dropdown-open .mega-links > li { animation: tnNavIn .24s ease-out both; }
.tn-nav-catalog.is-dropdown-open .mega-links > li:nth-child(2) { animation-delay: .02s; }
.tn-nav-catalog.is-dropdown-open .mega-links > li:nth-child(3) { animation-delay: .04s; }
.tn-nav-catalog.is-dropdown-open .mega-links > li:nth-child(4) { animation-delay: .06s; }
.tn-nav-catalog.is-dropdown-open .mega-links > li:nth-child(5) { animation-delay: .08s; }
.tn-nav-catalog.is-dropdown-open .mega-links > li:nth-child(6) { animation-delay: .10s; }
.tn-nav-catalog.is-dropdown-open .mega-links > li:nth-child(7) { animation-delay: .12s; }
.tn-nav-catalog.is-dropdown-open .mega-links > li:nth-child(n+8) { animation-delay: .14s; }
.tn-nav-ico {
  width: 18px; height: 18px; flex: none; display: inline-flex; padding: 3px; box-sizing: content-box;
  border-radius: 6px; color: var(--color-primary-light, #3cad6e); background: rgba(46,133,85,.14);
  transition: transform .2s ease, background .2s ease;
}
.tn-nav-ico svg { width: 100%; height: 100%; }
.tn-nav-catalog .mega-links > li > a:hover .tn-nav-ico { transform: translateY(-1px) rotate(-6deg); background: rgba(46,133,85,.24); }
html:not(.dark-mode) .tn-nav-catalog .mega-links > li > a { color: #1f2937; }
html:not(.dark-mode) .tn-nav-catalog .mega-links .sub-menu a { color: #6b7280; }
html:not(.dark-mode) .tn-nav-catalog .mega-links .sub-menu a:hover { color: var(--color-primary); background: #f0faf5; }
html:not(.dark-mode) .tn-nav-ico { color: var(--color-primary); background: #e8f5ee; }

/* CVE 看板徽章 */
.tn-nav-badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 18px; height: 18px; padding: 0 5px; margin-left: 6px; box-sizing: border-box;
  border-radius: 9px; background: #dc2626; color: #fff; font-size: .6875rem; font-weight: 700;
  line-height: 1; vertical-align: 1px; animation: tnNavRing 2.4s ease-out infinite;
}
.tn-nav-badge[hidden], .tn-nav-rl-count[hidden] { display: none !important; }

/* 稍後閱讀圖示 */
.tn-nav-rl { position: relative; }
.tn-nav-rl-count {
  position: absolute; top: -3px; right: -3px; min-width: 15px; height: 15px; padding: 0 4px; box-sizing: border-box;
  border-radius: 8px; background: var(--color-primary); color: #fff; font-size: .625rem; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center; line-height: 1;
}
.tn-nav-rl-count.tn-bump { animation: tnNavBump .35s ease-out; }

@media (prefers-reduced-motion: reduce) {
  .nav-menu > li > a::after, .tn-nav-ico { transition: none; }
  .nav-menu > li.is-dropdown-open > .mega-dropdown, .nav-menu > li.is-dropdown-open > .sub-menu,
  .menu-more-toggle.is-open > .menu-more-dropdown, .tn-nav-catalog.is-dropdown-open .mega-links > li,
  .tn-nav-badge, .tn-nav-rl-count.tn-bump { animation: none; }
}