/* ===========================================================
   TMO — shared site chrome (header / menu / footer / bottom bar / search)
   Single source of truth. Loaded by every page; the chrome markup is
   injected by site-chrome.js. Page-specific styles stay in each page.
   =========================================================== */
:root{
  --blue:#5575d9; --blue-soft:#cad6f9; --red:#ff3804;
  --ink:#28283c; --ink-soft:#55565e; --ink-muted:#9a9b9f;
  --grey:#dcdddd; --grey-soft:#ededee; --line:#c4c6c7;
  --font:'Oxanium','Chiron Hei HK','Noto Sans TC',sans-serif;
  --max:1280px; --pad:clamp(24px,4vw,64px); --bar-h:88px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;padding:0;background:#fff;font-family:var(--font);-webkit-font-smoothing:antialiased;color:var(--ink);}
img{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}

/* ---- scroll indicator (shared) ---- */
.scroll-ind{display:none;}
@media(min-width:761px){
  .scroll-ind{display:flex;flex-direction:column;align-items:center;gap:12px;width:max-content;pointer-events:none;}
  .scroll-ind span{font-family:'Oxanium',sans-serif;font-size:13px;font-weight:600;letter-spacing:.18em;}
  .scroll-ind .rail{position:relative;width:1px;height:32px;overflow:hidden;}
  .scroll-ind .rail::before{content:"";position:absolute;inset:0;background:currentColor;opacity:.2;}
  .scroll-ind .rail::after{content:"";position:absolute;left:0;top:0;width:100%;height:40%;background:currentColor;animation:scrollRun 1.8s cubic-bezier(.7,0,.3,1) infinite;}
  .scroll-ind{transition:opacity .3s ease;}
  .scroll-ind.hide{opacity:0;}
  @keyframes scrollRun{0%{transform:translateY(-100%);}100%{transform:translateY(250%);}}
}

/* ---- blue top bar (all widths) ---- */
.site-nav{position:sticky;top:0;z-index:60;background:transparent;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:0 var(--pad);height:var(--bar-h);}
.site-nav .lg img{height:34px;display:block;}
.site-nav nav{display:flex;align-items:stretch;gap:clamp(16px,2.2vw,42px);margin-right:auto;}
.site-nav .tn-item{position:relative;display:flex;align-items:center;}
.site-nav .tn-item>a{color:#28283c;font-size:16px;font-weight:500;letter-spacing:.08em;height:var(--bar-h);display:inline-flex;align-items:center;position:relative;white-space:nowrap;}
.site-nav .tn-item>a::after{content:"";position:absolute;left:0;bottom:26px;height:2.5px;width:0;background:var(--red);transition:width .3s cubic-bezier(.22,1,.36,1);}
.site-nav .tn-item:hover>a::after{width:100%;}

/* mega dropdown */
.tn-drop{position:fixed;left:0;right:0;top:var(--bar-h);width:100%;background:#fff;border-top:1px solid #e3e7ea;box-shadow:0 20px 36px rgba(40,40,60,.14);padding:30px var(--pad);opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-12px);transition:opacity .26s ease,transform .26s cubic-bezier(.22,1,.36,1),visibility .26s;z-index:5;}
.site-nav .tn-item:hover .tn-drop{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0);}
.tn-mega{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr 1fr;gap:6px 30px;max-width:var(--max);margin:0 auto;width:100%;align-items:start;}
.tn-mega-label{align-self:start;padding:8px 0;font-size:15px;font-weight:600;letter-spacing:.1em;color:#8a8b92;}
.tn-mega-label:hover{color:var(--blue);}
.tn-col{display:flex;flex-direction:column;}
.tn-mega .tn-col a{display:flex;align-items:baseline;gap:14px;padding:8px 10px;border-radius:7px;color:var(--ink);font-size:15px;font-weight:500;letter-spacing:.05em;white-space:nowrap;transition:background .15s,color .15s;}
.tn-mega .tn-col a:hover{background:#eef2fc;color:var(--blue);}
.tn-mega .tn-col a .code{font-weight:700;color:var(--ink-muted);min-width:14px;}
.tn-mega .tn-col a:hover .code{color:var(--blue);}

/* right-side icons + hamburger */
.site-nav .ic{display:flex;align-items:center;gap:8px;}
.site-nav .ic a,.ic-search-btn{width:42px;height:42px;border-radius:50%;color:#28283c;display:inline-flex;align-items:center;justify-content:center;transition:background .15s;background:none;border:0;cursor:pointer;}
.site-nav .ic a:hover,.ic-search-btn:hover{background:rgba(0,0,0,.06);}
.ic-search{display:inline-flex;align-items:center;position:relative;}
.ic-search input{width:0;padding:0;border:0;outline:0;height:42px;border-radius:999px;background:rgba(0,0,0,.05);color:#28283c;font:inherit;font-size:15px;letter-spacing:.03em;opacity:0;pointer-events:none;transition:width .38s cubic-bezier(.22,1,.36,1),padding .38s ease,opacity .25s ease;}
.ic-search input::placeholder{color:#9a9b9f;}
.ic-search.open input{width:clamp(240px,32vw,420px);padding:0 46px 0 18px;opacity:1;pointer-events:auto;}
.ic-search-btn{z-index:2;}
.ic-search.open .ic-search-btn{position:absolute;right:0;top:50%;transform:translateY(-50%);}

.tn-burger{display:none;background:none;border:none;cursor:pointer;padding:6px;margin-left:-16px;transition:transform .4s cubic-bezier(.34,1.56,.64,1);}
.tn-burger:active{transform:scale(.8);}
.tn-burger .tnb-box{position:relative;display:block;width:26px;height:18px;}
.tn-burger .tnb-box span{position:absolute;left:0;width:100%;height:2px;border-radius:2px;background:#28283c;transition:transform .38s cubic-bezier(.34,1.4,.64,1),top .32s ease,opacity .2s ease;}
.tn-burger .tnb-box span:nth-child(1){top:0;}
.tn-burger .tnb-box span:nth-child(2){top:8px;}
.tn-burger .tnb-box span:nth-child(3){top:16px;}
.tn-burger.open .tnb-box span:nth-child(1){top:8px;transform:rotate(45deg);}
.tn-burger.open .tnb-box span:nth-child(2){opacity:0;}
.tn-burger.open .tnb-box span:nth-child(3){top:8px;transform:rotate(-45deg);}

/* ---- slide-in menu sheet ---- */
.sheet{position:fixed;inset:0;height:100dvh;z-index:45;display:flex;align-items:flex-end;justify-content:flex-start;pointer-events:none;background:rgba(40,40,60,0);transition:background .35s ease;}
.sheet.open{pointer-events:auto;background:rgba(40,40,60,.4);}
.sheet-panel{width:min(80%,340px);min-width:258px;max-height:calc(100dvh - 60px - env(safe-area-inset-bottom));margin-bottom:calc(60px + env(safe-area-inset-bottom));background:#fff;display:flex;flex-direction:column;box-shadow:6px 0 24px rgba(0,0,0,.18);border-top-right-radius:5px;border-top:1px solid #d2d2d2;border-right:1px solid #d2d2d2;transform:translateY(calc(100% + 80px));transition:transform .42s cubic-bezier(.32,.72,.33,1);}
.sheet.open .sheet-panel{transform:translateY(0);}
.sheet-x{display:flex;justify-content:flex-end;padding:12px 14px 6px;}
.sheet-x button{background:none;border:none;cursor:pointer;padding:6px;transition:transform .45s cubic-bezier(.34,1.56,.64,1);}
.sheet-x button:active{transform:rotate(90deg) scale(.8);}
.sheet-x button svg path{stroke:#28283c;}
.sheet-scroll{flex:0 1 auto;min-height:0;overflow-y:auto;overscroll-behavior:contain;}
.sheet-scroll::-webkit-scrollbar{width:4px;}
.sheet-scroll::-webkit-scrollbar-thumb{background:#cfcfcf;border-radius:2px;}
.mrow{border-top:1px solid #d2d2d2;}
.sheet-scroll .mrow:last-child{border-bottom:1px solid #d2d2d2;}
.mrow>button{display:flex;width:100%;align-items:center;justify-content:space-between;padding:19px 24px;background:none;border:none;cursor:pointer;transition:background .2s ease,box-shadow .2s ease;}
.mrow>button:hover{background:#f1f1f2;box-shadow:inset 0 -2px 0 #28283c;}
.mrow-link{display:flex;width:100%;align-items:center;padding:19px 24px;text-decoration:none;transition:background .2s ease,box-shadow .2s ease;}
.mrow-link:hover{background:#f1f1f2;box-shadow:inset 0 -2px 0 #28283c;}
.mrow:has(>button:hover) + .mrow{border-top-color:transparent;}
.sheet-scroll .mrow:last-child:has(>button:hover){border-bottom-color:transparent;}
.mrow .lbl{font-size:16px;font-weight:500;color:#28283c;letter-spacing:.08em;white-space:nowrap;}
.msub{overflow:hidden;max-height:0;transition:max-height .35s ease;}
.mrow.open .msub{max-height:900px;}
.msub a{display:block;padding:17px 24px;background:#f5f5f6;border-bottom:1px solid #e3e3e3;font-size:15px;font-weight:500;color:#28283c;letter-spacing:.08em;text-decoration:none;}

/* +/- accordion icon */
.pm{position:relative;width:12px;height:12px;flex-shrink:0;transition:transform .35s cubic-bezier(.22,1,.36,1);}
.pm::before,.pm::after{content:"";position:absolute;background:currentColor;border-radius:2px;transition:transform .35s cubic-bezier(.22,1,.36,1),opacity .3s ease;}
.pm::before{left:50%;top:0;width:2px;height:12px;transform:translateX(-50%);}
.pm::after{top:50%;left:0;height:2px;width:12px;transform:translateY(-50%);}
.mrow .pm{color:#b0b0b0;transition:color .2s ease,transform .35s cubic-bezier(.22,1,.36,1);}
.mrow>button:hover .pm{color:#28283c;}
.mrow.open .pm{transform:rotate(180deg);}
.mrow.open .pm::before{transform:translateX(-50%) scaleY(0);opacity:0;}

/* ---- search results overlay ---- */
.hsearch-overlay{position:fixed;left:0;right:0;top:0;bottom:0;z-index:55;background:rgba(40,40,60,.28);backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .28s ease,visibility .28s;}
.hsearch-overlay.open{opacity:1;visibility:visible;pointer-events:auto;}
.hsearch-panel{background:#fff;max-height:calc(100dvh - 60px);overflow-y:auto;box-shadow:0 24px 40px rgba(40,40,60,.18);transform:translateY(-12px);transition:transform .3s cubic-bezier(.22,1,.36,1);padding:14px 0;}
.hsearch-overlay.open .hsearch-panel{transform:translateY(0);}
.hsearch-grp{padding:8px clamp(16px,5vw,28px) 4px;font-size:12px;font-weight:700;letter-spacing:.14em;color:#9a9b9f;}
.hsearch-item{display:flex;align-items:baseline;gap:14px;padding:13px clamp(16px,5vw,28px);color:#28283c;font-size:15px;font-weight:500;letter-spacing:.04em;text-decoration:none;transition:background .15s,color .15s;}
.hsearch-item:hover,.hsearch-item:active{background:#eef2fc;color:var(--blue);}
.hsearch-item .c{font-weight:700;color:#9a9b9f;min-width:48px;}
.hsearch-item:hover .c{color:var(--blue);}
.hsearch-empty{padding:30px clamp(16px,5vw,28px);color:#8a8b92;font-size:15px;letter-spacing:.06em;}
/* top search field — only shown in the mobile full-screen sheet (see ≤600 below) */
.hsearch-top{display:none;align-items:center;gap:10px;padding:calc(env(safe-area-inset-top) + 10px) 14px 10px;background:#fff;border-bottom:1px solid #e7e7e8;}
.hsearch-field{flex:1;min-width:0;display:flex;align-items:center;gap:8px;background:#f0f0f1;border-radius:999px;padding:0 14px;height:44px;}
.hsearch-field svg{flex-shrink:0;width:20px;height:20px;color:#9a9b9f;}
.hsearch-field input{flex:1;min-width:0;border:0;outline:0;background:none;font:inherit;font-size:16px;color:var(--ink);letter-spacing:.02em;height:44px;}
.hsearch-field input::placeholder{color:#9a9b9f;}
.hsearch-cancel{flex-shrink:0;background:none;border:0;color:var(--red);font:inherit;font-size:15px;font-weight:500;letter-spacing:.04em;cursor:pointer;padding:6px 4px;}

/* ---- mobile bottom bar ---- */
.botbar{position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid #dcdddd;display:flex;align-items:center;justify-content:space-between;padding:13px clamp(16px,5vw,28px) calc(13px + env(safe-area-inset-bottom));z-index:50;transform:translateY(0);transition:transform .35s;}
.botbar.hide{transform:translateY(110%);}
.botbar>button,.botbar>a,.botbar .right a,.botbar .right button{background:none;border:none;cursor:pointer;padding:4px;display:flex;color:var(--red);}
#bb-burger{transition:transform .4s cubic-bezier(.34,1.56,.64,1);}
#bb-burger:active{transform:scale(.78);}
.botbar .right{display:flex;align-items:center;gap:26px;flex:1;justify-content:flex-end;min-width:0;}
.bb-search{display:flex;align-items:center;position:relative;}
.bb-search.open{flex:1;min-width:0;}
.bb-search input{width:0;flex:0 1 0;min-width:0;padding:0;border:0;outline:0;height:40px;border-radius:999px;background:#f0f0f1;color:var(--ink);font:inherit;font-size:15px;letter-spacing:.02em;opacity:0;pointer-events:none;transition:width .36s cubic-bezier(.22,1,.36,1),padding .36s ease,opacity .22s ease;}
.bb-search input::placeholder{color:#9a9b9f;}
.bb-search.open input{width:auto;flex:1 1 auto;padding:0 44px 0 16px;opacity:1;pointer-events:auto;}
.bb-search-btn{flex-shrink:0;background:none;border:none;cursor:pointer;padding:4px;display:flex;color:var(--red);z-index:2;}
.bb-search.open .bb-search-btn{position:absolute;right:0;top:50%;transform:translateY(-50%);}

/* ---- footer ---- */
.site-foot{background:var(--grey-soft);padding:6px 0 34px;}
.ft-cols{display:none;}
.ft-acc .ft-row{}
.ft-row>button{display:flex;width:100%;align-items:center;justify-content:space-between;padding:19px var(--pad);background:none;border:none;border-bottom:1px solid var(--line);cursor:pointer;transition:background .2s ease,box-shadow .2s ease;}
.ft-row>button:hover{background:#f1f1f2;box-shadow:inset 0 -2px 0 #28283c;}
.ft-link{display:flex;width:100%;align-items:center;padding:19px var(--pad);border-bottom:1px solid var(--line);text-decoration:none;transition:background .2s ease,box-shadow .2s ease;}
.ft-link:hover{background:#f1f1f2;box-shadow:inset 0 -2px 0 #28283c;}
.ft-row .lbl{font-size:16px;font-weight:500;color:var(--ink);letter-spacing:.08em;}
.ft-row .pm{color:#b0b0b0;}
.ft-row>button:hover .pm{color:#28283c;}
.ft-row.open .pm{transform:rotate(180deg);}
.ft-row.open .pm::before{transform:translateX(-50%) scaleY(0);opacity:0;}
.ft-sub{overflow:hidden;max-height:0;transition:max-height .35s ease;}
.ft-row.open .ft-sub{max-height:900px;}
.ft-sub a{display:block;padding:14px var(--pad);background:#fff;border-bottom:1px solid #e3e3e3;font-size:14px;color:var(--ink);letter-spacing:.08em;text-decoration:none;}
.ft-logo{display:none;}
.ft-logo img{width:60%;max-width:240px;display:block;}
.ft-copy{padding:40px var(--pad) 0;font-size:11px;color:var(--ink-soft);letter-spacing:.08em;line-height:1.9;}

/* =========================== ≤600 (mobile) =========================== */
/* logo-only blue bar; navigation handled by the bottom bar (matches product page) */
@media(max-width:600px){
  .site-nav nav{display:none;}
  .site-nav .ic{display:none;}
  .site-nav .lg img{width:200px;max-width:62vw;height:auto;}
  /* search becomes a solid full-screen sheet: field at top (above the keyboard),
     results below, NO blur — so the input text and results are always readable */
  .hsearch-overlay{top:0;z-index:70;background:#fff;-webkit-backdrop-filter:none;backdrop-filter:none;display:flex;flex-direction:column;}
  .hsearch-overlay .hsearch-top{display:flex;}
  .hsearch-panel{flex:1 1 auto;min-height:0;max-height:none;box-shadow:none;transform:none;transition:none;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:6px 0 calc(env(safe-area-inset-bottom) + 20px);}
  .hsearch-overlay.open .hsearch-panel{transform:none;}
  /* lock the page behind the sheet so it doesn't scroll under it */
  html.hsearch-lock,html.hsearch-lock body{overflow:hidden;}
}
/* =========================== ≥601 (tablet) =========================== */
@media(min-width:601px){
  .botbar,.bb-search{display:none !important;}
  .site-nav .ic{display:flex;}
  .tn-burger{display:inline-flex;align-items:center;justify-content:center;}
  .site-nav nav{display:none;}        /* tablet: hamburger instead of inline nav */
  .ic{margin-left:auto;}
  .sheet-x{display:none;}
  /* tablet sheet: drops from below the bar */
  .sheet{align-items:flex-start;top:var(--bar-h);bottom:0;left:0;right:0;height:auto;max-height:none;background:rgba(40,40,60,.2);backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);transform:none;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .3s ease,visibility .3s;}
  .sheet.open{opacity:1;visibility:visible;pointer-events:auto;background:rgba(40,40,60,.2);}
  .sheet-panel{width:100%;min-width:0;max-height:calc(100dvh - var(--bar-h));margin-bottom:0;border:0;border-radius:0;box-shadow:0 18px 30px rgba(0,0,0,.18);transform:translateY(-110%);transition:transform .4s cubic-bezier(.32,.72,.33,1);}
  .sheet.open .sheet-panel{transform:translateY(0);}
  .sheet-scroll{flex:1 1 auto;}
  .sheet .mrow>button{padding-left:var(--pad);padding-right:var(--pad);}
  .sheet .mrow-link{padding-left:var(--pad);padding-right:var(--pad);}
  .sheet .msub a{padding-left:var(--pad);}
  .hsearch-overlay{top:var(--bar-h);}
  .hsearch-panel{max-height:min(70vh,560px);}
}
/* =========================== ≥1025 (desktop) =========================== */
@media(min-width:1025px){
  .site-nav nav{display:none;}        /* use hamburger menu at all widths */
  .tn-burger{display:inline-flex;align-items:center;justify-content:center;}
  .ic{margin-left:auto;}
  /* desktop: menu sheet slides in from the right */
  .sheet{align-items:flex-start;justify-content:flex-end;top:var(--bar-h);bottom:0;left:0;right:0;height:auto;max-height:none;background:rgba(40,40,60,.28);backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);transform:none;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .3s ease,visibility .3s;}
  .sheet.open{opacity:1;visibility:visible;pointer-events:auto;}
  .sheet-panel{width:min(420px,92vw);min-width:0;height:auto;max-height:calc(100dvh - var(--bar-h));margin-bottom:0;border:0;border-radius:0;box-shadow:-8px 0 30px rgba(0,0,0,.2);transform:translateX(100%);transition:transform .42s cubic-bezier(.32,.72,.33,1);}
  .sheet.open .sheet-panel{transform:translateX(0);}
  /* footer columns (desktop only; tablet keeps mobile accordion) */
  .site-foot{padding:clamp(48px,5vw,72px) var(--pad) 16px;}
  .ft-acc{display:none;}
  .ft-cols{display:grid;grid-template-columns:repeat(5,1fr);gap:28px;max-width:var(--max);margin:0 auto;}
  .ft-cols .fb{display:none;}
  .ft-cols .fb p{display:none;}
  .ft-cols .fb img{width:170px;margin-bottom:16px;}
  .ft-cols .fb p{font-size:13px;line-height:1.9;color:var(--ink-soft);letter-spacing:.04em;margin:0;}
  .ft-cols h4{font-size:15px;font-weight:700;letter-spacing:.1em;margin:0 0 12px;}
  .ft-cols h4 a{font-size:inherit;font-weight:inherit;letter-spacing:inherit;padding:0;display:inline;}
  .ft-cols a{display:block;font-size:14px;color:var(--ink-soft);letter-spacing:.06em;padding:6px 0;transition:color .15s;text-decoration:none;}
  .ft-cols a:hover{color:var(--blue);}
  .ft-cols .ft-prod{grid-column:span 2;}
  .ft-prod-grid{display:grid;grid-template-columns:1fr 1fr;column-gap:24px;}
  .ft-cols .ft-inst{grid-column:span 2;}
  .ft-inst-grid{display:grid;grid-template-columns:1fr 1fr;column-gap:24px;}
  .ft-logo{display:none;}
  .ft-copy{max-width:var(--max);margin:0 auto;padding:60px 0 0;text-align:left;font-size:13px;line-height:2;}
  .ft-copy br{display:none;}
  .ft-copy .ftc-2{margin-left:1.5em;}
}

/* ===== language toggle (中/EN) ===== */
/* header: plain "EN"/"中" text (no circular frame) */
.lang-btn{height:42px;min-width:42px;padding:0 8px;border-radius:8px;border:0;background:none;color:#28283c;font:600 15px/1 'Oxanium','Noto Sans TC',sans-serif;letter-spacing:.02em;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:background .15s;}
.lang-btn:hover{background:rgba(0,0,0,.06);}
.site-nav.nav-light .lang-btn{color:#fff;}
.mrow .lang-row{width:100%;text-align:left;background:none;border:0;cursor:pointer;}
/* language row lives only in the mobile hamburger menu; desktop/tablet use the header text button */
@media(min-width:601px){ .mrow-lang{display:none;} }