/* Shared Menu Behavior Styles */
:root { --mega-offset-y: 0px; --panel-overlap: 4px; --header-height: 85px; }

/* Normalize ul.menu spacing */
ul.menu, .menu { margin: 0; padding: 0; list-style: none; }
/* Links vertical alignment */
.menu > li > a { display: flex; align-items: center; line-height: 1; padding: 6px 6px; }
/* Ensure center column centers its child vertically */
.header-center { align-items: center; }

/* Desktop behavior */
@media (min-width: 769px) {
  .submenu a.mobile-only { display: none !important; }
  /* Hover to open dropdown submenu on desktop */
  .menu > li:not(.has-mega):hover .submenu { display: block; }
}

/* Touch/no-hover environments: disable hover-only mega behavior */
@media (hover: none), (pointer: coarse) {
  .menu > li.has-mega:hover .mega-panel { display: none !important; visibility: hidden !important; pointer-events: none !important; }
  .menu > li.has-mega.open .mega-panel { display: block !important; }
}

/* Mobile width rules: accordion behavior */
@media (max-width: 768px) {
  /* Submenu becomes a drawer in mobile; closed by default, opened via .open */
  .menu > li .submenu {
    position: static; left: auto; top: auto; min-width: 100%;
    background: transparent; border: none; box-shadow: none;
    padding: 0 12px 12px; display: none;
  }
  /* Disable hover-open behavior on mobile; only .open shows submenu */
  .menu > li:hover .submenu { display: none !important; }
  .menu > li.open .submenu { display: block !important; }

  /* Show mobile-only entries in submenu on mobile */
  .submenu a.mobile-only { display: block !important; }

  /* Add right-side chevron for dropdown/mega items on mobile */
  .menu > li.has-dropdown > a,
  .menu > li.has-mega > a {
    position: relative;
    padding-right: 24px !important;
  }
  .menu > li.has-dropdown > a::after,
  .menu > li.has-mega > a::after {
    content: '';
    position: absolute; right: 16px !important; top: 50%;
    width: 0; height: 0;
    border-left: 6px solid transparent; border-right: 6px solid transparent; border-top: 6px solid var(--text);
    transform: translateY(-50%) rotate(0deg);
    transition: transform 200ms ease;
    opacity: 0.8; pointer-events: none;
  }
  .menu > li.open > a::after { transform: translateY(-50%) rotate(180deg); }

  /* Mega panels disabled on mobile (we use simple submenu instead) */
  .menu > li.has-mega .mega-panel { display: none !important; }
  .menu > li.has-mega.open .mega-panel { display: none !important; }

  /* Unify mobile font weights to match index */
  .menu > li > a { font-weight: 600 !important; }
  .menu > li .submenu a { font-weight: 500 !important; }
  /* Mobile: fix hamburger button position to match index */
  .site-header .nav-toggle {
    display: inline-block !important;
    position: fixed !important;
    right: 14px !important;
    top: calc((var(--header-height) - 32px) / 2) !important;
    z-index: 11000 !important;
  }
}

/* Desktop full-bleed mega panel (kept for compatibility if any remains) */
@media (min-width: 769px) {
  .menu > li.has-mega { position: static; }
  .mega-panel {
    position: fixed !important;
    left: 0 !important; right: 0 !important;
    top: var(--header-height) !important;
    width: auto !important; max-width: none !important;
    transform: none !important; margin: 0 !important; box-sizing: border-box !important;
    background: #f5f6f8 !important; /* light gray panel */
    border: 0 !important; box-shadow: none !important; border-radius: 0 !important;
    padding: 24px 0 !important; z-index: 1005 !important;
    opacity: 0; visibility: hidden; pointer-events: none;
  }
  .menu > li.has-mega.open .mega-panel { opacity: 1; visibility: visible; pointer-events: auto; display: block !important; transform: none !important; }
  .mega-panel::after { display: none !important; }

  .mega-grid { display: grid; grid-template-columns: repeat(2, minmax(340px, 1fr)); grid-auto-rows: auto; gap: 20px; width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; justify-content: center; }
}

/* Mega Menu Animations (shared across pages) */
@keyframes megaCardIn { from { opacity: 0; transform: translateY(10px) scale(0.98); } to { opacity: 1; transform: translateY(0) scale(1); } }
.mega-grid .mega-card { opacity: 0; transform: translateY(10px) scale(0.98); }
@media (hover: hover) and (pointer: fine) {
  .menu > li.has-mega.open .mega-panel .mega-card,
  .menu > li.has-mega:hover .mega-panel .mega-card,
  .menu > li.has-mega:focus-within .mega-panel .mega-card,
  .menu > li.has-mega > a:hover + .mega-panel .mega-card,
  .menu > li.has-mega > a:focus + .mega-panel .mega-card { animation: megaCardIn 260ms ease both; }
  .menu > li.has-mega.open .mega-grid .mega-card:nth-child(1),
  .menu > li.has-mega:hover .mega-grid .mega-card:nth-child(1),
  .menu > li.has-mega:focus-within .mega-grid .mega-card:nth-child(1) { animation-delay: 0ms; }
}
@media (prefers-reduced-motion: reduce) { .mega-grid .mega-card { opacity: 1; transform: none; animation: none; }
}

/* Shared Mega Card Styles (kept if any remains) */
.mega-card { background: #fff; border-radius: 12px; padding: 16px; display: flex; flex-direction: column; gap: 12px; align-items: flex-start; border: 1px solid rgba(0,0,0,0.06); box-shadow: 0 1px 4px rgba(0,0,0,0.08); transition: transform .14s ease, box-shadow .14s ease; }
.mega-card:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0,0,0,0.12); }
.mega-card.featured { min-height: 360px; }
.mega-image { background: #fff; border-radius: 10px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.mega-card.featured .mega-image { width: 100%; aspect-ratio: 3 / 2; }
.mega-image img { width: 100%; height: 100%; object-fit: contain; object-position: center; display: block; }
.mega-card h4 { font-size: 16px; margin: 0 0 8px 0; color: #111; text-align: left; }
.mega-card ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr; row-gap: 4px; }
.mega-card li { display: block; font-size: 14px; color: #333; }

/* Header seamless flag */
.site-header.header-seamless { border-bottom: none !important; box-shadow: none !important; }
.mega-panel::before, .mega-panel::after { display: none !important; }

/* Lock scroll when menu is open (applies site-wide) */
html { scrollbar-gutter: auto; }
/* Desktop: lock scroll when menu is open */
@media (min-width: 769px) {
  html.menu-open, body.menu-open {
    overflow: hidden !important;
    height: 100vh !important;
    overscroll-behavior: none !important;
    touch-action: none !important;
  }
}
/* Mobile: lock scroll when menu is open, keep header fixed visible */
@media (max-width: 768px) {
  html.menu-open, body.menu-open {
    overflow: hidden !important;
    height: 100dvh !important;
    overscroll-behavior: none !important;
    touch-action: none !important;
  }
}

/* Mobile: header & drawer rules (shared across pages) */
@media (max-width: 768px) {
  /* Shared header & logo base rules (apply site-wide) */
  .site-header { position: sticky; top: 0; z-index: 1004; background: var(--surface); border-bottom: none; }
  .site-header.drawer-open { position: fixed !important; top: 0 !important; left: 0; right: 0; z-index: 11003 !important; }
  .header-inner { max-width: 1200px; margin: 0 auto; padding: 15px 20px 0 0; height: var(--header-height); display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 24px; position: relative; }
  .header-left { display: flex; align-items: center; }
  .header-center { flex: 1; display: flex; justify-content: flex-start; align-items: center; }
  .header-right { display: flex; align-items: center; gap: 12px; }
  .logo { display: inline-flex; align-items: center; align-self: center; justify-content: flex-start; position: absolute; left: 12px; top: 50%; transform: translateY(-50%); height: calc(var(--header-height) - 10px); margin: 0; overflow: hidden; }
  .logo img { height: 100%; max-height: var(--header-height); width: auto; max-width: 100%; display: block; object-fit: contain; transform: none; }
  .menu { list-style: none; display: flex; align-items: center; gap: 40px; }
  /* Neutralize page-specific .nav sliding to avoid overlay conflicts */
  .nav {
    position: static !important;
    right: auto !important;
    left: auto !important;
    width: auto !important;
    height: auto !important;
    background: transparent !important;
    border: none !important;
    padding: 0 !important;
    transition: none !important;
    z-index: auto !important;
  }
  .nav.active, .nav.closing { right: auto !important; left: auto !important; }

  /* Mobile drawer for main menu (shared across pages) */
  .menu {
    position: fixed !important;
    top: var(--header-height) !important;
    left: 0 !important;
    right: 0 !important;
    width: 100vw !important;
    max-width: 100vw !important;
    height: calc(100dvh - var(--header-height)) !important;
    background: var(--surface) !important;
    padding: 0 !important;
    margin: 0 !important;
    box-sizing: border-box !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0 !important;
    overflow-y: auto !important;
    z-index: 1001 !important;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .3s ease, transform .3s ease;
  }
  /* Mobile drawer scrollbar styling: remove gray track */
  .menu { scrollbar-color: var(--text) transparent; scrollbar-width: thin; }
  .menu::-webkit-scrollbar { width: 12px; }
  .menu::-webkit-scrollbar-track { background: transparent; }
  .menu::-webkit-scrollbar-thumb { background-color: rgba(0,0,0,0.35); border-radius: 6px; border: 3px solid transparent; }

  .menu.active { opacity: 1; visibility: visible; transform: translateY(0); pointer-events: auto; }
  .menu.closing { opacity: 0; transform: translateY(-8px); visibility: visible; pointer-events: none; }

  .menu > li { width: 100%; }
  .menu > li > a { display: flex; justify-content: space-between; align-items: center; width: 100%; padding: 16px 12px; font-weight: 600; }
  /* Mobile header height and padding unify */
  .header-inner { height: 70px !important; justify-content: flex-start; padding: 0 12px; --header-height: 70px; }
  /* Ensure logo scales with header height on mobile */
  .logo { height: calc(var(--header-height) - 10px) !important; }
  .logo img { max-height: var(--header-height) !important; }
}

/* Hamburger toggle active state: morph to close icon */
.nav-toggle.active span:nth-child(1) { transform: translateY(6px) rotate(45deg) !important; }
.nav-toggle.active span:nth-child(2) { opacity: 0 !important; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg) !important; }
@media (max-width: 768px) {
  /* 修正：限定尺寸，避免漢堡三條線撐滿頂部；保持原位 */
  /* 手機：移除選單文字變色與藍色外框，統一與首頁一致 */
  .menu > li > a,
  .submenu a {
    color: var(--text) !important;
    text-decoration: none !important;
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
    -webkit-tap-highlight-color: transparent;
  }
  .menu > li > a:hover,
  .menu > li > a:active,
  .menu > li > a:focus,
  .menu > li:hover > a,
  .submenu a:hover,
  .submenu a:active,
  .submenu a:focus {
    color: var(--text) !important;
    background: transparent !important;
    border-color: transparent !important;
  }
  .menu a:visited,
  .submenu a:visited { color: var(--text) !important; }
  .menu > li > a:focus-visible,
  .submenu a:focus-visible { outline: none !important; }

  /* 手機：同步中和頂部 nav 連結的按鈕樣式 */
  .nav a,
  .nav-links a {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    color: var(--text) !important;
    outline: none !important;
  }
  .nav a:hover,
  .nav-links a:hover,
  .nav a:focus,
  .nav-links a:focus,
  .nav a:active,
  .nav-links a:active {
    background: transparent !important;
    border: none !important;
    color: var(--text) !important;
  }
  .nav a:focus-visible,
  .nav-links a:focus-visible { outline: none !important; }
}

/* Site-wide full-bleed: remove side gaps on mobile and desktop */
.wrapper,
.container,
.banner-container,
.service-container,
.info-social-container {
  width: 100% !important;
  max-width: none !important;
  margin: 0 !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
}
/* Desktop mega grid also full-bleed */
@media (min-width: 769px) {
  .mega-grid { width: 100% !important; max-width: none !important; padding-left: 0 !important; padding-right: 0 !important; }
}

/* Brand Footer (shared across pages) */
.brand-footer { border-top: 1px solid var(--border); background: var(--surface); color: var(--muted); padding: 24px 20px; position: relative; }
.brand-footer__inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1.2fr 0.8fr; grid-template-rows: auto auto auto; gap: 20px; align-items: center; }
.brand-footer__logo { grid-column: 1; grid-row: 1; display: flex; align-items: center; }
.brand-footer__logo img { height: 56px; width: auto; object-fit: contain; display: block; }
.brand-footer__columns { grid-column: 2; grid-row: 1; justify-self: end; }
.brand-footer__col h4 { font-size: 16px; color: var(--text); font-weight: 700; margin-bottom: 10px; }
.brand-footer__col ul { list-style: none; margin: 0; padding: 0; }
.brand-footer__col li { margin: 8px 0; }
.brand-footer__col a { color: var(--text); text-decoration: none; }
.brand-footer__col a:hover { text-decoration: underline; color: var(--primary); }
.brand-footer__social { grid-column: 2; grid-row: 2; justify-self: center; display: inline-flex; gap: 14px; }
.brand-footer__social a { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 999px; border: 1px solid rgba(0,0,0,0.18); color: var(--text); background: #fff; box-shadow: var(--shadow-soft); transition: transform .15s ease, box-shadow .15s ease, background-color .15s ease; }
.brand-footer__social a:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(0,0,0,0.12); background: #f7f7f7; }
.brand-footer__social svg { width: 16px; height: 16px; display: block; }
.brand-footer__copyright { grid-column: 1 / span 3; grid-row: 3; font-size: 13px; color: var(--muted); }
@media (max-width: 768px) {
  .brand-footer { padding: 20px 16px; }
  .brand-footer__inner { grid-template-columns: 1fr; grid-template-rows: auto auto auto auto; gap: 14px; }
  .brand-footer__logo { grid-column: 1; grid-row: 1; justify-content: center; }
  .brand-footer__logo { height: 48px; }
  .brand-footer__columns { grid-column: 1; grid-row: 2; justify-self: center; text-align: center; }
  .brand-footer__social { grid-column: 1; grid-row: 3; justify-self: center; }
  .brand-footer__copyright { grid-column: 1; grid-row: 4; text-align: center; }
}

/* Back-to-top button (shared, hardened against page overrides) */
.back-to-top { position: fixed; right: 24px; bottom: 24px; width: 46px !important; height: 46px !important; border-radius: 999px !important; background-color: var(--primary, #4682B4) !important; background-image: none !important; color: #fff !important; border: none !important; box-shadow: 0 6px 16px rgba(0,0,0,0.18); display: inline-flex !important; align-items: center !important; justify-content: center !important; padding: 0 !important; margin: 0 !important; text-decoration: none !important; outline: none !important; -webkit-appearance: none !important; appearance: none !important; cursor: pointer !important; opacity: 0; visibility: hidden; transform: translateY(8px); transition: opacity .3s ease, visibility .3s ease, transform .3s ease, background-color .2s ease; z-index: 1002; background-clip: padding-box; }
.back-to-top:hover { background-color: var(--primary-600, #3a6d94) !important; background-image: none !important; }
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
/* 改為 SVG 箭頭樣式，繼承 currentColor */
.arrow-up { display: inline-flex; align-items: center; justify-content: center; line-height: 1; color: inherit; }
.arrow-up svg { width: 18px !important; height: 18px !important; display: block; fill: none; stroke: currentColor; stroke-width: 2; }
/* 視覺隱藏用於無障礙：隱藏描述文字但保留讀屏 */
.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0, 0, 0, 0) !important; white-space: nowrap !important; border: 0 !important; }
@media (max-width: 768px) { .back-to-top { right: 16px; bottom: 16px; width: 44px !important; height: 44px !important; font-size: 16px; } }

/* Arrow upward animation (respect reduced motion) */
@keyframes arrowUpPulse { 0% { transform: translateY(0); } 50% { transform: translateY(-2px); } 100% { transform: translateY(0); } }
.back-to-top.show .arrow-up { animation: arrowUpPulse 1.2s ease-in-out infinite; }
@media (prefers-reduced-motion: reduce) { .back-to-top.show .arrow-up { animation: none; } }

/* === Shared Social Buttons (brand-footer) === */
.brand-footer__social { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.social-link { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 8px; text-decoration: none; color: var(--text); background: transparent; border: 1px solid var(--border); transition: background .2s ease, color .2s ease, border-color .2s ease; }
.social-link:hover { color: var(--primary); border-color: rgba(70,130,180,0.35); background: rgba(70,130,180,0.08); }
.social-link:focus-visible { outline: 2px solid rgba(70,130,180,0.5); outline-offset: 2px; }
.social-link svg { width: 18px; height: 18px; display: block; }
@media (max-width: 768px) { .brand-footer__social { gap: 8px; } .social-link { width: 32px; height: 32px; border-radius: 6px; } }