/* HOYAN 資訊架構（第 3 步）：主選單下拉、產品類別頁、產品頁模板
   Loaded after main.css; uses its colour tokens, so light and dark themes both work. */

/* ── main menu with drop-down panels (desktop) ── */
.nav-links > li { position: static; }
.nav-links > li > .nav-top { display: inline-flex; align-items: center; gap: 6px; }
.nav-links > li > .nav-top .fa-chevron-down { font-size: .62rem; opacity: .6; transition: transform .2s; }
.nav-links > li.has-mega:hover > .nav-top .fa-chevron-down,
.nav-links > li.has-mega:focus-within > .nav-top .fa-chevron-down { transform: rotate(180deg); }
.mega {
  position: absolute; left: 0; right: 0; top: var(--nav-height);
  background: var(--bg-primary); border-bottom: 1px solid var(--border);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .12);
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: opacity .18s, transform .18s, visibility .18s;
}
.nav-links > li.has-mega:hover > .mega,
.nav-links > li.has-mega:focus-within > .mega,
.nav-links > li.has-mega.open > .mega { opacity: 1; visibility: visible; transform: none; }
.nav-links > li.has-mega.closed > .mega { opacity: 0; visibility: hidden; }
.mega-inner { max-width: 1280px; margin: 0 auto; padding: 26px 5% 22px; }
.mega-cols { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 22px; }
.mega-cols.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); max-width: 820px; }
.mega-cols.c4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.nav-links > li > .nav-top.on { color: var(--accent); }
.mega-col h4 { font-size: .8rem; letter-spacing: .08em; color: var(--text-muted); margin: 0 0 10px; font-weight: 700; }
.mega-col h4 a { color: inherit; padding: 0; background: none; }
.mega-col h4 a:hover { color: var(--accent); background: none; }
.mega .mega-col a { display: block; padding: 6px 0; font-size: .9rem; color: var(--text-primary); border-radius: 0; background: none; white-space: normal; }
.mega .mega-col a small { display: block; font-size: .76rem; color: var(--text-muted); font-weight: 400; margin-top: 1px; }
.mega .mega-col a:hover { color: var(--accent); background: none; }
.mega-foot { display: flex; gap: 22px; flex-wrap: wrap; margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--border); }
.mega .mega-foot a { padding: 0; font-size: .85rem; color: var(--accent); background: none; }
.mega .mega-foot a:hover { background: none; text-decoration: underline; }
@media (max-width: 1100px) { .mega-cols, .mega-cols.c4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* ── mobile menu: groups fold open ── */
#mobileMenu { max-height: calc(100vh - var(--nav-height)); overflow-y: auto; }
.m-group { border-bottom: 1px solid var(--divider); }
.m-group > summary { list-style: none; cursor: pointer; padding: 14px 0; font-size: 1rem; font-weight: 600; color: var(--text-primary); display: flex; justify-content: space-between; align-items: center; }
.m-group > summary::-webkit-details-marker { display: none; }
.m-group > summary::after { content: '+'; font-weight: 400; color: var(--text-muted); font-size: 1.2rem; }
.m-group[open] > summary::after { content: '−'; }
.m-group .m-sub { padding: 0 0 12px 4px; }
.m-group .m-sub b { display: block; font-size: .78rem; letter-spacing: .06em; margin: 12px 0 2px; }
.m-group .m-sub b a { color: var(--text-muted); padding: 0; font-size: inherit; }
.m-group .m-sub a { display: block; padding: 8px 0; color: var(--text-secondary); text-decoration: none; font-size: .95rem; }
.m-group .m-sub a:hover { color: var(--accent); }

/* ── shared blocks ── */
.poc-note { position: fixed; left: 16px; bottom: 16px; z-index: 900; max-width: 380px; padding: 10px 14px; border-radius: 10px; font-size: .8rem; line-height: 1.6;
  color: var(--text-secondary); background: var(--bg-primary); border: 1px solid rgba(255, 184, 0, .5); box-shadow: 0 6px 20px rgba(0, 0, 0, .12); }
.poc-note b { color: var(--text-primary); }
.ia-section { max-width: 1280px; margin: 0 auto; }
.ia-h2 { font-size: 1.5rem; margin: 0 0 8px; }
.ia-lead { color: var(--text-secondary); line-height: 1.8; max-width: 760px; margin: 0 0 26px; }
.ia-btns { display: flex; gap: 10px; flex-wrap: wrap; }
.ia-btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: 10px; font-size: .88rem; font-weight: 600;
  text-decoration: none; border: 1px solid var(--border-solid); color: var(--accent); background: transparent; transition: all .2s; }
.ia-btn:hover { background: rgba(0, 212, 255, .08); }
.ia-btn.primary { background: linear-gradient(135deg, var(--accent2), var(--accent)); color: var(--on-accent); border-color: transparent; }
.ia-btn.primary:hover { filter: brightness(1.08); }

/* ── category page ── */
.cat-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.cat-card { display: flex; flex-direction: column; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: border-color .2s, transform .2s; }
.cat-card:hover { border-color: var(--border-solid); transform: translateY(-3px); }
.cat-card .ph { background: #fff; height: 210px; display: block; overflow: hidden; flex: 0 0 auto; }
.cat-card .ph img { width: 100%; height: 100%; object-fit: cover; display: block; }
.cat-card .bd { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.cat-card .model { font-size: 1.15rem; font-weight: 800; color: var(--text-primary); text-decoration: none; }
.cat-card .model:hover { color: var(--accent); }
.cat-card .name { font-size: .85rem; color: var(--accent); font-weight: 600; }
.cat-card .one { font-size: .86rem; color: var(--text-secondary); line-height: 1.7; }
.cat-card ul { list-style: none; padding: 0; margin: 4px 0 0; border-top: 1px solid var(--border); }
.cat-card li { font-size: .8rem; color: var(--text-secondary); padding: 7px 0; border-bottom: 1px solid var(--border); display: flex; gap: 8px; }
.cat-card li b { color: var(--text-muted); font-weight: 500; min-width: 58px; }
.cat-card .links { margin-top: auto; padding-top: 10px; display: flex; gap: 14px; flex-wrap: wrap; font-size: .84rem; }
.cat-card .links a { color: var(--accent); text-decoration: none; font-weight: 600; }
.cat-card .links a:hover { text-decoration: underline; }

.cmp-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-card); }
.cmp { width: 100%; border-collapse: collapse; min-width: 860px; font-size: .86rem; }
.cmp th, .cmp td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; line-height: 1.6; }
.cmp thead th { font-size: .95rem; color: var(--text-primary); background: var(--bg-card); position: sticky; top: 0; }
.cmp thead th a { color: inherit; text-decoration: none; }
.cmp thead th a:hover { color: var(--accent); }
.cmp tbody th { color: var(--text-muted); font-weight: 500; white-space: nowrap; width: 120px; position: sticky; left: 0; background: var(--bg-primary); }
.cmp td { color: var(--text-secondary); }
.cmp td.na { color: var(--text-muted); }
.cmp tr:last-child th, .cmp tr:last-child td { border-bottom: 0; }

.pick { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.pick a { display: flex; gap: 14px; align-items: flex-start; padding: 18px 20px; border: 1px solid var(--border); border-radius: 14px; background: var(--bg-card); text-decoration: none; transition: border-color .2s; }
.pick a:hover { border-color: var(--border-solid); }
.pick .q { font-size: .92rem; color: var(--text-primary); line-height: 1.6; }
.pick .a { font-size: .85rem; color: var(--accent); font-weight: 700; margin-top: 4px; }
.pick i { color: var(--accent); margin-top: 4px; }

.dl-list { display: grid; gap: 10px; }
.dl-row { display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap; padding: 14px 18px; border: 1px solid var(--border); border-radius: 12px; background: var(--bg-card); }
.dl-row .t { color: var(--text-primary); font-weight: 600; font-size: .92rem; }
.dl-row .t small { display: block; color: var(--text-muted); font-weight: 400; font-size: .78rem; margin-top: 2px; }
.dl-row .f { display: flex; gap: 12px; flex-wrap: wrap; font-size: .82rem; }
.dl-row .f a { color: var(--accent); text-decoration: none; font-weight: 600; }
.dl-row .f a span { color: var(--text-muted); font-weight: 400; margin-left: 4px; }

/* ── product page template ── */
.pd-top { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 48px; align-items: center; }
.pd-img { background: #fff; border-radius: var(--radius); border: 1px solid var(--border); aspect-ratio: 4 / 3; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.pd-img img { width: 100%; height: 100%; object-fit: contain; }
.pd-kicker { font-size: .82rem; font-weight: 700; color: var(--accent); letter-spacing: .06em; }
.pd-top h1 { font-size: 2.3rem; line-height: 1.25; margin: 8px 0 14px; }
.pd-top h1 span { display: block; font-size: 1.15rem; color: var(--text-secondary); font-weight: 600; margin-top: 6px; }
.pd-keys { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin: 20px 0 24px; }
.pd-keys div { padding: 12px 14px; border: 1px solid var(--border); border-radius: 12px; background: var(--bg-card); }
.pd-keys b { display: block; font-size: .75rem; color: var(--text-muted); font-weight: 500; margin-bottom: 3px; }
.pd-keys span { font-size: .9rem; color: var(--text-primary); font-weight: 600; }
.pd-tabs { position: sticky; top: var(--nav-height); z-index: 50; background: var(--bg-nav-solid); border-bottom: 1px solid var(--border); backdrop-filter: blur(16px); }
.pd-tabs .in { max-width: 1280px; margin: 0 auto; padding: 0 5%; display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; }
.pd-tabs .in::-webkit-scrollbar { display: none; }
.pd-tabs a { padding: 14px 14px; font-size: .88rem; color: var(--text-secondary); text-decoration: none; white-space: nowrap; border-bottom: 2px solid transparent; }
.pd-tabs a:hover { color: var(--accent); }
.pd-tabs a.on { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
.pd-sec { scroll-margin-top: calc(var(--nav-height) + 60px); padding-top: 56px; }
.pd-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.pd-cards .card h3 { font-size: 1rem; margin-bottom: 8px; }
.pd-cards .card p { color: var(--text-secondary); font-size: .88rem; line-height: 1.8; }
.spec-table { width: 100%; border-collapse: collapse; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--bg-card); font-size: .9rem; }
.spec-table th, .spec-table td { text-align: left; padding: 13px 18px; border-bottom: 1px solid var(--border); vertical-align: top; line-height: 1.6; }
.spec-table th { width: 30%; color: var(--text-muted); font-weight: 500; }
.spec-table td { color: var(--text-primary); }
.spec-table tr.grp th { color: var(--accent); font-weight: 700; font-size: .8rem; letter-spacing: .06em; background: rgba(0, 212, 255, .04); }
.faq details { border: 1px solid var(--border); border-radius: 12px; background: var(--bg-card); margin-bottom: 10px; }
.faq summary { cursor: pointer; padding: 16px 20px; font-weight: 600; color: var(--text-primary); list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; color: var(--text-muted); }
.faq details[open] summary::after { content: '−'; }
.faq details p { padding: 0 20px 16px; color: var(--text-secondary); line-height: 1.8; font-size: .9rem; }
.rel-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.rel-grid a { display: block; border: 1px solid var(--border); border-radius: 14px; overflow: hidden; background: var(--bg-card); text-decoration: none; transition: border-color .2s; }
.rel-grid a:hover { border-color: var(--border-solid); }
.rel-grid .ph { background: #fff; height: 170px; overflow: hidden; }
.rel-grid .ph img { width: 100%; height: 100%; object-fit: cover; display: block; }
.rel-grid .t { padding: 12px 14px; }
.rel-grid .t b { display: block; color: var(--text-primary); font-size: .95rem; }
.rel-grid .t span { color: var(--text-muted); font-size: .8rem; }
.todo { display: inline-block; font-size: .72rem; padding: 2px 8px; border-radius: 6px; background: rgba(255, 184, 0, .14); color: #c98a00; font-weight: 700; }

@media (max-width: 1024px) {
  .cat-grid, .rel-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pd-top { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 768px) {
  .pick, .pd-cards { grid-template-columns: 1fr; }
  .pd-top h1 { font-size: 1.8rem; }
  .cmp tbody th { width: 96px; white-space: normal; }
}
@media (max-width: 520px) {
  .cat-grid, .rel-grid { grid-template-columns: 1fr; }
  .pd-keys { grid-template-columns: 1fr; }
}

/* five menu items plus the tool buttons need about 1100 px; below that use the compact menu */
@media (max-width: 1100px) {
  .nav-links { display: none; }
  .nav-right { display: flex; gap: 6px; margin-left: auto; }
  .nav-right > * { display: none; }
  .nav-right > .theme-toggle, .nav-right > .nav-lang { display: inline-flex; padding: 7px 11px; }
  .nav-right > .nav-lang .nav-lang-text { display: none; }
  .nav-right > .nav-lang i, .nav-right > .theme-toggle i { margin: 0; font-size: .95rem; }
  .nav-hamburger { display: flex; margin-left: 10px; }
}
.cat-grid.c2 { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 820px; }
@media (max-width: 520px) { .cat-grid.c2 { grid-template-columns: 1fr; } }

/* product pages: the first overview block already has its own top margin */
#overview > div:first-child { margin-top: 0 !important; }
#overview { padding-top: 40px; }

/* ── solution pages ── */
.solution-detail-hero { position: relative; min-height: 46vh; display: flex; align-items: flex-end; padding: calc(var(--nav-height) + 40px) 0 56px; overflow: hidden; }
.solution-detail-hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,.95) 0%, rgba(0,0,0,.4) 60%, rgba(0,0,0,0) 100%); z-index: 1; }
.solution-detail-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0; filter: brightness(.6); }
.solution-hero-content { position: relative; z-index: 2; max-width: 1280px; width: 100%; margin: 0 auto; padding: 0 5%; }
.solution-hero-content .breadcrumb a, .solution-hero-content .breadcrumb span { color: rgba(255,255,255,.75); }
.solution-hero-content .kicker { color: var(--accent); font-size: .95rem; font-weight: 700; letter-spacing: .12em; display: inline-block; margin: 16px 0 10px; }
.solution-hero-content h1 { color: #fff; font-size: clamp(2rem, 4.5vw, 3.6rem); margin: 0; line-height: 1.2; }
.solution-hero-content p { color: rgba(255,255,255,.82); max-width: 720px; margin-top: 14px; line-height: 1.8; }
.solution-detail-body { max-width: 900px; margin: 0 auto; padding: 64px 5% 70px; }
.solution-detail-body h3 { font-size: 1.45rem; color: var(--text-primary); border-left: 4px solid var(--accent); padding-left: 14px; margin: 40px 0 18px; }
.solution-detail-body h3:first-child { margin-top: 0; }
.solution-detail-body p { font-size: 1.02rem; line-height: 1.9; color: var(--text-secondary); margin-bottom: 20px; }
.solution-detail-body ul { margin-bottom: 26px; padding-left: 20px; color: var(--text-secondary); font-size: 1.02rem; line-height: 1.8; }
.solution-detail-body li { margin-bottom: 10px; }
.solution-detail-body li strong, .solution-detail-body p strong { color: var(--text-primary); }
.sol-used { margin-top: 48px; }
.sol-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.sol-card { position: relative; display: flex; align-items: flex-end; min-height: 260px; border-radius: 16px; overflow: hidden; text-decoration: none; background: #000; border: 1px solid var(--border); }
.sol-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: brightness(.55); transition: transform .4s; }
.sol-card:hover img { transform: scale(1.04); }
.sol-card .in { position: relative; z-index: 1; padding: 22px; background: linear-gradient(to top, rgba(0,0,0,.92), rgba(0,0,0,0)); width: 100%; }
.sol-card .ind { color: var(--accent); font-size: .8rem; font-weight: 700; letter-spacing: .08em; }
.sol-card h3 { color: #fff; font-size: 1.2rem; margin: 6px 0 8px; }
.sol-card p { color: rgba(255,255,255,.78); font-size: .86rem; line-height: 1.7; }
@media (max-width: 1024px) { .sol-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .sol-grid { grid-template-columns: 1fr; } }

/* products.html: browse by class */
.cb-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-top: 14px; }
.cb-tile { display: flex; flex-direction: column; gap: 6px; padding: 20px 22px; border: 1px solid var(--border); border-radius: 14px; background: var(--bg-card); text-decoration: none; transition: border-color .2s, transform .2s; }
.cb-tile:hover { border-color: var(--border-solid); transform: translateY(-2px); }
.cb-tile i { color: var(--accent); font-size: 1.3rem; }
.cb-tile b { color: var(--text-primary); font-size: 1.05rem; }
.cb-tile span { color: var(--text-muted); font-size: .8rem; line-height: 1.6; }
@media (max-width: 1024px) { .cb-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .cb-grid { grid-template-columns: 1fr; } }