/* =============================================================
   JET OPTO — 升級選單（V4/V5/V6 共用）
   桌機：產品 mega panel（三線縮圖卡）· 手機：沉浸式全屏選單
   疊加於 home-base.css 之上。
   ============================================================= */

/* ---------- 桌機 mega panel ---------- */
.ni-mega {
  position: fixed; left: 0; right: 0; top: 74px;
  padding: 26px var(--gutter) 30px;
  background: rgba(250, 251, 252, .92);
  backdrop-filter: blur(24px) saturate(1.3);
  -webkit-backdrop-filter: blur(24px) saturate(1.3);
  border-bottom: 1px solid rgba(16, 22, 30, .08);
  box-shadow: 0 30px 70px rgba(16, 22, 30, .12);
  opacity: 0; visibility: hidden; transform: translateY(-12px);
  transition: opacity .35s var(--ease-out), transform .35s var(--ease-out), visibility 0s .35s;
}
.ni:hover .ni-mega, .ni:focus-within .ni-mega { opacity: 1; visibility: visible; transform: none; transition-delay: 0s; }
.mega-grid {
  max-width: 1440px; margin-inline: auto;
  display: grid; grid-template-columns: repeat(3, 1fr) .8fr; gap: 18px;
}
.mega-card {
  --m-rgb: var(--ckpt-rgb);
  position: relative; display: block;
  border-radius: 16px; overflow: hidden;
  border: 1px solid rgba(16, 22, 30, .08);
  background: #fff;
  transition: transform .45s var(--ease-out), box-shadow .45s, border-color .35s;
}
.mega-card:hover {
  transform: translateY(-4px);
  border-color: rgba(var(--m-rgb), .6);
  box-shadow: 0 18px 44px rgba(16, 22, 30, .14), 0 0 0 1px rgba(var(--m-rgb), .25);
}
.mega-card figure { margin: 0; aspect-ratio: 16 / 8.5; overflow: hidden; }
.mega-card figure img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease-out); }
.mega-card:hover figure img { transform: scale(1.07); }
.mega-card .mc-body { padding: 13px 16px 15px; }
.mega-card .mc-k { font-family: var(--font-mono); font-size: 9.5px; font-weight: 700; letter-spacing: .22em; color: rgb(var(--m-rgb)); text-transform: uppercase; }
.mega-card h5 { margin: 5px 0 0; font-size: 15.5px; font-weight: 800; color: #10161e; }
.mega-card p { margin: 4px 0 0; font-size: 12px; color: rgba(16, 22, 30, .55); line-height: 1.6; }
.mega-aside {
  display: flex; flex-direction: column; justify-content: center; gap: 10px;
  padding: 18px 20px; border-radius: 16px;
  background: #10161e; color: #fff;
}
.mega-aside .k { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: .24em; color: rgba(255, 255, 255, .45); text-transform: uppercase; }
.mega-aside b { font-size: 16px; font-weight: 800; line-height: 1.4; }
.mega-aside a {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 6px;
  font-size: 13px; font-weight: 700; color: #8fd8ff;
  transition: gap .3s;
}
.mega-aside a:hover { gap: 14px; }

/* ---------- 手機沉浸式全屏選單 ---------- */
.nav-mobile {
  background: #0c1016;
  padding: 92px var(--gutter) 36px;
  display: flex; flex-direction: column;
}
.nav-mobile .mrow {
  position: relative;
  display: flex; align-items: baseline; justify-content: space-between; gap: 14px;
  padding: 15px 0; border-bottom: 1px solid rgba(255, 255, 255, .08);
  font-size: clamp(21px, 5.6vw, 28px); font-weight: 800; color: #eef3fa;
  opacity: 0; transform: translateX(-28px);
  transition: opacity .5s var(--ease-out), transform .5s var(--ease-out), color .3s;
}
body.menu-open .nav-mobile .mrow {
  opacity: 1; transform: none;
  transition-delay: calc(.1s + var(--i, 0) * .05s);
}
.nav-mobile .mrow small {
  display: block; margin: 0;
  font-family: var(--font-mono); font-size: 9.5px; font-weight: 600;
  letter-spacing: .26em; text-transform: uppercase; color: rgba(226, 236, 248, .38);
  border: 0; padding: 0;
}
.nav-mobile .mrow .no {
  font-family: var(--font-mono); font-size: 12px; font-weight: 600;
  color: rgba(226, 236, 248, .3);
}
.nav-mobile .mrow:active { color: rgb(var(--mr-rgb, var(--ckpt-rgb))); }
.nav-mobile .mrow::after {
  content: ""; position: absolute; left: 0; bottom: -1px;
  width: 0; height: 1px; background: rgb(var(--mr-rgb, var(--ckpt-rgb)));
  transition: width .5s var(--ease-out);
}
.nav-mobile .mrow:hover::after { width: 100%; }
.nav-mobile .nav-lang { border-color: rgba(255, 255, 255, .25); }
.nav-mobile .nav-lang a { color: rgba(226, 236, 248, .55); }
.nav-mobile .nav-lang a.on { background: #eef3fa; color: #0c1016; }
/* 底部三色光譜條 */
.nav-mobile .mspectrum {
  display: flex; gap: 8px; margin-top: auto; padding-top: 26px;
}
.nav-mobile .mspectrum i { height: 4px; border-radius: 4px; flex: 1; opacity: 0; transform: scaleX(0); transform-origin: left; transition: opacity .5s, transform .7s var(--ease-out); }
.nav-mobile .mspectrum i:nth-child(1) { background: var(--ent); transition-delay: .3s; }
.nav-mobile .mspectrum i:nth-child(2) { background: var(--ckpt); transition-delay: .4s; }
.nav-mobile .mspectrum i:nth-child(3) { background: var(--safe); transition-delay: .5s; }
body.menu-open .nav-mobile .mspectrum i { opacity: 1; transform: none; }

/* 選單開啟：內容退場模糊 */
main, .ha-stage, .site-footer { transition: filter .5s ease, transform .5s var(--ease-out); }
body.menu-open main, body.menu-open .ha-stage, body.menu-open .site-footer {
  filter: blur(10px) saturate(.8);
  transform: scale(.985);
}
/* 開啟時漢堡反白（深色選單上） */
body.menu-open .nav-burger { border-color: rgba(255, 255, 255, .35); }
body.menu-open .nav-burger span::before, body.menu-open .nav-burger span::after { background: #eef3fa; }

/* ===================================================================
   多欄群組下拉（投資人關係 / ESG 專區 — 結構依 common/header.html 定案）
   =================================================================== */
.ni-drop.ni-cols {
  display: flex; gap: 4px; padding: 12px;
  left: auto; right: 0; translate: 0 0;
}
.ni-drop.ni-cols .col { min-width: 182px; }
.ni-cols .grp {
  display: block; padding: 9px 13px 3px;
  font-family: var(--font-mono); font-size: 10px; font-weight: 600;
  letter-spacing: .18em; text-transform: uppercase;
  color: rgba(16, 22, 30, .4);
}
.ni-cols .grp.sub { padding-left: 24px; letter-spacing: .14em; }
.ni-cols a.sub { padding-left: 26px; font-size: 13px; }
.ni-cols .sep { display: block; height: 1px; background: rgba(16, 22, 30, .08); margin: 8px 6px; }

/* ---------- 手機：投資人 / ESG 摺疊群組（details） ---------- */
.nav-mobile details.mgroup { border-bottom: 1px solid rgba(255, 255, 255, .08); }
.nav-mobile details.mgroup > summary.mrow {
  border-bottom: 0; cursor: pointer; list-style: none;
}
.nav-mobile details.mgroup > summary.mrow::-webkit-details-marker { display: none; }
.nav-mobile details.mgroup[open] > summary.mrow { color: rgb(var(--mr-rgb, var(--ckpt-rgb))); }
.nav-mobile .msub { padding: 2px 0 16px; }
.nav-mobile .msub .mg {
  display: block; padding: 12px 0 2px; border: 0;
  font-family: var(--font-mono); font-size: 10px; font-weight: 600;
  letter-spacing: .22em; text-transform: uppercase;
  color: rgba(226, 236, 248, .38);
}
.nav-mobile .msub a {
  display: block; padding: 7px 0; border: 0;
  font-size: 15px; font-weight: 500; color: rgba(226, 236, 248, .78);
}
.nav-mobile .msub a.sub { padding-left: 14px; font-size: 14px; }
.nav-mobile .msub a:active { color: rgb(var(--mr-rgb, var(--ckpt-rgb))); }

/* ══ 手機選單修正(2026-07-20):可捲動 + 隱藏序號 ══ */
/* 永久預留捲軸槽:選單開啟鎖背景捲動(overflow:hidden)隱藏捲軸時,版面寬度不變,
   漢堡/語系鈕不會右移跳動 —— 與三個產品頁的手機選單一致(2026-07-24) */
html { scrollbar-gutter: stable; }
body.menu-open { overflow: hidden; }             /* 鎖背景捲動,讓選單自身捲動 */
.nav-mobile {
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-y;
}
.nav-mobile .mrow .no,
.nav-mobile .mgroup summary .no { display: none; }  /* 不顯示 01 02 03 序號 */