/* =========================================================
   強視科技 BESTVISION — Corporate Site
   Built on the AI/AOI Design System (sky blue + deep navy)
   ========================================================= */
:root{
  color-scheme: dark;
  /* Brand blues */
  --bv-blue:#0F81CA;
  --bv-sky:#52BBFF;
  --bv-blue-mid:#1688CE;
  --bv-indigo:#417EEA;
  /* Inks & navy */
  --bv-navy:#023D63;
  --bv-navy-2:#0B3F63;
  --bv-navy-deep:#064369;
  --bv-ink:#0E2433;
  /* deeper darks for tech sections */
  --bv-abyss:#03161F;
  --bv-abyss-2:#06222F;
  /* Neutral */
  --bv-slate:#5B6F7F;
  /* Accents */
  --bv-teal:#24B8A8;
  --bv-orange:#F2A444;
  /* Tints */
  --bv-tint:#C9E3F1;
  --bv-tint-2:#EAF4FA;
  --bv-tint-3:#D1E5F1;
  --bv-line:#BFD8E6;
  --bv-paper:#F4F8FB;
  --bv-white:#FFFFFF;

  --font-latin:'Poppins',sans-serif;
  --font-zh:'Noto Sans TC','Microsoft JhengHei','PingFang TC',sans-serif;
  --font-cond:'Saira Semi Condensed','Poppins',sans-serif;

  --maxw:1240px;
  --gut:clamp(20px,5vw,72px);
  --nav-h:74px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-zh);
  color:var(--bv-ink);
  background:var(--bv-paper);
  -webkit-font-smoothing:antialiased;
  line-height:1.65;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gut)}
.en{font-family:var(--font-latin)}
.num{font-family:var(--font-cond)}

/* ---------- shared eyebrow ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:12px;margin-bottom:18px}
.eyebrow .bar{width:9px;height:26px;background:var(--bv-sky);flex:none}
.eyebrow .bar.teal{background:var(--bv-teal)}
.eyebrow .bar.orange{background:var(--bv-orange)}
.eyebrow .t{font-family:var(--font-latin);font-weight:700;font-size:13px;letter-spacing:.22em;text-transform:uppercase;color:var(--bv-blue)}
.eyebrow.on-dark .t{color:var(--bv-sky)}

.sec-title{font-family:var(--font-zh);font-weight:900;font-size:clamp(28px,3.6vw,46px);line-height:1.14;letter-spacing:.01em}
.sec-title .sub{display:block;font-family:var(--font-latin);font-weight:600;font-size:clamp(14px,1.4vw,18px);letter-spacing:.14em;text-transform:uppercase;color:var(--bv-slate);margin-top:10px}
.on-dark .sec-title{color:#fff}
.on-dark .sec-title .sub{color:var(--bv-sky)}
.lede{font-size:clamp(16px,1.25vw,18px);color:var(--bv-slate);max-width:62ch;margin-top:18px;text-wrap:pretty}
.on-dark .lede{color:#A9C6D8}

section{position:relative}
.pad{padding:clamp(64px,9vw,128px) 0}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}
.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}
.reveal.d5{transition-delay:.40s}.reveal.d6{transition-delay:.48s}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
}

/* =========================================================
   NAV
   ========================================================= */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);
  display:flex;align-items:center;
  transition:background .4s ease,box-shadow .4s ease,border-color .4s ease;
  border-bottom:1px solid transparent;}
.nav .wrap{display:flex;align-items:center;justify-content:flex-start;width:100%}
.nav.solid{background:rgba(255,255,255,.92);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--bv-line);box-shadow:0 8px 30px -22px rgba(2,61,99,.5)}
.brand{display:flex;align-items:center;gap:13px}
.brand .mark{width:38px;height:auto;filter:drop-shadow(0 2px 6px rgba(82,187,255,.5))}
.brand .nm{line-height:1.05}
.brand .zh{font-weight:900;font-size:19px;letter-spacing:.05em;color:#fff;transition:color .4s}
.brand .lt{font-family:var(--font-latin);font-weight:700;font-size:10.5px;letter-spacing:.34em;color:var(--bv-sky);text-transform:uppercase;margin-top:2px}
.nav.solid .brand .zh{color:var(--bv-blue)}
.nav-links{display:flex;align-items:center;gap:3px;margin-left:auto}
.nav-links a{font-size:12.5px;font-weight:500;color:rgba(255,255,255,.82);letter-spacing:.01em;white-space:nowrap;
  padding:7px 10px;border-radius:999px;transition:color .22s ease,background .22s ease}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.13)}
.nav.solid .nav-links a{color:var(--bv-navy)}
.nav.solid .nav-links a:hover{color:var(--bv-blue);background:rgba(15,129,202,.10)}
.nav-links a.active,
.nav.solid .nav-links a.active{background:var(--bv-blue);color:#fff}
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-zh);font-weight:700;font-size:14.5px;white-space:nowrap;
  padding:11px 22px;border:0;cursor:pointer;letter-spacing:.02em;transition:transform .2s ease,box-shadow .25s ease,background .25s ease}
.btn .ar{font-family:var(--font-latin);transition:transform .25s ease}
.btn:hover .ar{transform:translateX(4px)}
.btn-primary{background:var(--bv-sky);color:var(--bv-navy);box-shadow:0 10px 26px -12px rgba(82,187,255,.8)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px -12px rgba(82,187,255,.9);background:#6cc6ff}
.btn-blue{background:var(--bv-blue);color:#fff;box-shadow:0 10px 26px -14px rgba(15,129,202,.9)}
.btn-blue:hover{transform:translateY(-2px);background:#1690dd}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.5)}
.btn-ghost:hover{border-color:var(--bv-sky);color:var(--bv-sky)}
.btn-lg{padding:15px 30px;font-size:16px}
.nav-cta{flex:none;margin-left:14px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{width:24px;height:2px;background:#fff;display:block;transition:.3s}
.nav.solid .nav-toggle span{background:var(--bv-navy)}

/* =========================================================
   HERO
   ========================================================= */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;overflow:hidden;
  background:
    radial-gradient(1100px 700px at 78% 8%, rgba(22,136,206,.42) 0%, rgba(22,136,206,0) 60%),
    radial-gradient(900px 600px at 12% 92%, rgba(36,184,168,.18) 0%, rgba(36,184,168,0) 60%),
    linear-gradient(160deg,#04202F 0%, #03161F 55%, #021019 100%);
  color:#fff;padding-top:var(--nav-h)}
.hero .grid-bg{position:absolute;inset:0;z-index:0;opacity:.5;
  background-image:linear-gradient(rgba(82,187,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(82,187,255,.07) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(900px 700px at 70% 30%,#000 0%,transparent 75%);
  -webkit-mask-image:radial-gradient(900px 700px at 70% 30%,#000 0%,transparent 75%);}
.hero .dots{position:absolute;top:-4%;left:5%;height:80%;width:auto;opacity:.34;z-index:1;will-change:transform}
.hero .net{position:absolute;right:0;bottom:6%;width:min(620px,52vw);opacity:.5;z-index:1;will-change:transform}
.hero .hex{position:absolute;left:46%;top:18%;width:160px;opacity:.16;z-index:1}
.hero .wrap{position:relative;z-index:3;display:grid;grid-template-columns:1fr 1.02fr;gap:40px;align-items:center;width:100%}
.hero-copy{max-width:640px}
.hero .kicker{display:inline-flex;align-items:center;gap:10px;border:1px solid rgba(82,187,255,.45);border-radius:999px;white-space:nowrap;
  padding:7px 16px;font-size:13px;font-weight:600;color:var(--bv-sky);letter-spacing:.04em;margin-bottom:26px;background:rgba(82,187,255,.08)}
.hero .kicker .pulse{width:8px;height:8px;border-radius:50%;background:var(--bv-sky);box-shadow:0 0 0 0 rgba(82,187,255,.7);animation:pulse 2.4s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(82,187,255,.6)}70%{box-shadow:0 0 0 12px rgba(82,187,255,0)}100%{box-shadow:0 0 0 0 rgba(82,187,255,0)}}
.hero h1{font-family:var(--font-zh);font-weight:900;font-size:clamp(52px,8vw,104px);line-height:1.12;letter-spacing:.01em;
  color:#fff}
@supports ((-webkit-background-clip:text) or (background-clip:text)){
  .hero h1{background:linear-gradient(180deg,#fff 30%,#cfe9fb 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
  .hero h1 .accent{background:linear-gradient(180deg,var(--bv-sky),#2f9fe6);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
}
.hero h1 .clause{display:inline-block;white-space:nowrap}
.hero h1 .accent{color:var(--bv-sky)}
.hero h1 .clause + .clause{margin-left:.42em}
.hero h1 .dot{padding:0 .04em}
.hero .h1-en{display:block;font-family:var(--font-latin);font-weight:600;font-size:clamp(15px,1.6vw,20px);letter-spacing:.16em;
  text-transform:uppercase;color:var(--bv-sky);margin-top:20px;background:none;-webkit-text-fill-color:var(--bv-sky)}
.hero .tagline{font-size:clamp(16px,1.4vw,19px);color:#Bcd9ec;max-width:50ch;margin-top:24px;line-height:1.7}
.hero .tagline b{color:#fff;font-weight:700}
.hero .cta-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}
.hero .pills{display:flex;flex-wrap:nowrap;gap:8px;margin-top:34px}
.hero .pills .p{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;color:#cbe6f6;white-space:nowrap;
  border:1px solid rgba(149,196,224,.28);padding:7px 12px}
.hero .pills .p .d{width:6px;height:6px;background:var(--bv-sky);border-radius:50%}
/* hero visual: machine */
.hero-visual{position:relative;justify-self:end;width:100%}
.hero-visual .glow{position:absolute;left:50%;top:46%;transform:translate(-50%,-50%);width:115%;height:80%;
  background:radial-gradient(closest-side,rgba(82,187,255,.4),rgba(82,187,255,0) 70%);filter:blur(8px);z-index:0}
.hero-visual .machine{position:relative;z-index:2;width:120%;max-width:none;margin-left:-10%;filter:drop-shadow(0 40px 60px rgba(0,0,0,.55));will-change:transform}
.hero-visual .floor{position:absolute;left:50%;bottom:2%;transform:translateX(-50%);width:78%;height:42px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(82,187,255,.32),rgba(82,187,255,0) 75%);z-index:1}
/* scan-line accent over machine */
.hero-visual .scan{position:absolute;left:8%;right:8%;top:30%;height:2px;z-index:3;
  background:linear-gradient(90deg,transparent,var(--bv-sky),transparent);box-shadow:0 0 16px 1px rgba(82,187,255,.8);
  animation:scan 4.5s ease-in-out infinite;opacity:.85}
@keyframes scan{0%,100%{top:24%;opacity:0}10%{opacity:.9}50%{top:64%;opacity:.9}90%{opacity:0}}
@media (prefers-reduced-motion:reduce){.hero-visual .scan,.hero .kicker .pulse{animation:none}}
.scroll-cue{position:absolute;left:50%;bottom:26px;transform:translateX(-50%);z-index:4;color:#8fb6cd;
  font-family:var(--font-latin);font-size:11px;letter-spacing:.28em;text-transform:uppercase;display:flex;flex-direction:column;align-items:center;gap:10px}
.scroll-cue .line{width:1px;height:42px;background:linear-gradient(180deg,var(--bv-sky),transparent);animation:cue 2s ease-in-out infinite}
@keyframes cue{0%,100%{opacity:.3;transform:scaleY(.6)}50%{opacity:1;transform:scaleY(1)}}

/* =========================================================
   WHO WE ARE
   ========================================================= */
.who{background:var(--bv-white)}
.who .grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(36px,5vw,80px);align-items:center}
.who p.body{font-size:17px;color:var(--bv-ink);margin-top:18px;line-height:1.85;text-wrap:pretty}
.who p.body + p.body{margin-top:16px}
.who .who-visual{position:relative}
.who .who-visual img{width:100%;border:1px solid var(--bv-line);box-shadow:0 30px 60px -36px rgba(2,61,99,.5)}
.who .who-visual .chip{position:absolute;left:-18px;bottom:-18px;display:flex;background:#fff;box-shadow:0 18px 40px -18px rgba(2,61,99,.5)}
.who .who-visual .chip i{width:64px;height:78px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:34px;font-style:normal}
.who .who-visual .chip i:nth-child(1){background:var(--bv-blue)}
.who .who-visual .chip i:nth-child(2){background:var(--bv-navy)}
.who .focus{margin-top:26px;display:flex;gap:14px;align-items:flex-start;border-left:8px solid var(--bv-teal);background:var(--bv-tint-2);padding:18px 22px}
.who .focus h4{font-size:16px;color:var(--bv-navy);font-weight:700}
.who .focus p{font-size:14.5px;color:var(--bv-slate);margin-top:5px}

/* =========================================================
   STATS (dark)
   ========================================================= */
.stats{background:linear-gradient(160deg,#06222F,#03161F);color:#fff;overflow:hidden}
.stats .net{position:absolute;right:-40px;top:50%;transform:translateY(-50%);width:520px;opacity:.18;z-index:0}
.stats .wrap{position:relative;z-index:2}
.stats .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:2px;margin-top:48px;background:rgba(149,196,224,.16)}
.stat{background:#04202F;padding:34px 26px;position:relative}
.stat .v{font-family:var(--font-cond);font-weight:700;font-size:clamp(44px,5.5vw,68px);line-height:1;color:#fff;display:flex;align-items:baseline;gap:4px}
.stat .v .u{font-size:.42em;color:var(--bv-sky);font-weight:600}
.stat .v .plus{color:var(--bv-sky)}
.stat .k{font-size:15px;font-weight:700;color:#fff;margin-top:14px}
.stat .c{font-size:13px;color:#8fb6cd;margin-top:5px;line-height:1.5}
.stat::before{content:"";position:absolute;left:26px;top:0;width:38px;height:3px;background:var(--bv-sky)}
.stat:nth-child(2)::before{background:var(--bv-teal)}
.stat:nth-child(3)::before{background:var(--bv-indigo)}
.stat:nth-child(4)::before{background:var(--bv-orange)}

/* =========================================================
   SERVICES
   ========================================================= */
.services{background:var(--bv-paper)}
.svc-models{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:52px}
.svc-card{background:#fff;border:1px solid var(--bv-line);padding:34px 30px 30px;position:relative;overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .35s cubic-bezier(.2,.7,.2,1),box-shadow .35s,border-color .35s}
.svc-card:hover{transform:translateY(-6px);box-shadow:0 30px 50px -28px rgba(2,61,99,.45);border-color:var(--bv-sky)}
.svc-card .no{font-family:var(--font-cond);font-weight:700;font-size:60px;line-height:1;color:var(--bv-tint);transition:color .35s}
.svc-card:hover .no{color:var(--bv-sky)}
.svc-card h3{font-size:23px;font-weight:900;color:var(--bv-ink);margin-top:8px}
.svc-card h3 .en{display:block;font-family:var(--font-latin);font-weight:600;font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--bv-slate);margin-top:6px}
.svc-card p{font-size:14.5px;color:var(--bv-slate);margin-top:14px;line-height:1.7}
.svc-card .rail{position:absolute;left:0;top:0;bottom:0;width:6px;background:var(--bv-sky);transform:scaleY(0);transform-origin:top;transition:transform .35s}
.svc-card:hover .rail{transform:scaleY(1)}
/* contextual photo at bottom of each service card */
.svc-card .svc-photo{margin-top:auto;padding-top:26px}
.svc-card .svc-photo img{display:block;width:100%;aspect-ratio:1/1;height:auto;object-fit:cover;object-position:center;
  background:var(--bv-tint-2);border:1px solid var(--bv-line);transition:transform .5s cubic-bezier(.2,.7,.2,1)}
.svc-card:hover .svc-photo img{transform:scale(1.04)}
/* capability columns */
.svc-caps{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-top:48px;border-top:1px solid var(--bv-line);padding-top:42px}
.cap h4{font-family:var(--font-latin);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--bv-blue);font-weight:700;margin-bottom:16px}
.cap .tags{display:flex;flex-wrap:wrap;gap:9px}
.tag{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;padding:8px 15px;background:#fff;border:1px solid var(--bv-line);color:var(--bv-navy);white-space:nowrap}
.tag .d{width:6px;height:6px;border-radius:50%;background:var(--bv-sky)}
.tag.solid{background:var(--bv-blue);color:#fff;border-color:var(--bv-blue)}
.tag.solid .d{background:#fff}

/* =========================================================
   PRODUCTS
   ========================================================= */
.products{background:var(--bv-white)}
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:52px}
.prod{background:#fff;border:1px solid var(--bv-line);display:flex;flex-direction:column;position:relative;overflow:hidden;
  transition:transform .35s cubic-bezier(.2,.7,.2,1),box-shadow .35s,border-color .35s}
.prod:hover{transform:translateY(-6px);box-shadow:0 32px 56px -30px rgba(2,61,99,.5);border-color:var(--bv-sky)}
.prod .topbar{height:5px;background:var(--bv-blue-mid)}
.prod.teal .topbar{background:var(--bv-teal)}
.prod.sky .topbar{background:var(--bv-sky)}
.prod.deep .topbar{background:var(--bv-navy-deep)}
.prod.orange .topbar{background:var(--bv-orange)}
.prod.indigo .topbar{background:var(--bv-indigo)}
.prod .body{padding:18px 30px 14px;display:flex;flex-direction:column}
.prod .pname{font-size:23px;font-weight:900;color:var(--bv-ink);line-height:1.22}
.prod .pen{font-family:var(--font-latin);font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--bv-blue);text-transform:uppercase;margin-top:4px}
.prod .inds{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.prod .inds .i{font-size:13px;font-weight:600;color:#fff;background:var(--bv-blue);padding:5px 13px;border-radius:999px;white-space:nowrap}
.prod .perf-head{margin-top:13px;font-family:var(--font-zh);font-size:13.5px;font-weight:800;color:var(--bv-blue);display:flex;align-items:center;gap:9px}
.prod .perf-head em{font-style:normal;font-family:var(--font-latin);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--bv-slate);font-weight:700}
.prod .specs{margin-top:10px;border-top:1px solid var(--bv-line);padding-top:2px}
.prod .spec{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:6px 0;border-bottom:1px solid var(--bv-tint-2)}
.prod .spec:last-child{border-bottom:0}
.prod .spec .sk{font-size:15.5px;color:var(--bv-slate);font-weight:600;flex:none;white-space:nowrap}
.prod .spec .sv{font-family:var(--font-cond);font-weight:700;font-size:21px;color:var(--bv-ink);text-align:right;white-space:nowrap}
.prod .spec .sv em{font-style:normal;font-family:var(--font-zh);font-size:16px;font-weight:700}
.prod .ftag{margin:10px 30px 14px;display:flex;flex-wrap:wrap;gap:9px}
.prod .ftag span{font-size:13px;font-weight:600;color:var(--bv-slate)}
.prod .ftag span::before{content:"# ";color:var(--bv-sky)}

/* ---- product carousel ---- */
.lede-nowrap{white-space:nowrap}
.prod-carousel{position:relative;margin-top:clamp(40px,5vw,56px);padding:0 clamp(56px,6vw,88px)}
.pc-viewport{overflow:hidden}
.pc-track{display:flex;height:100%;will-change:transform;transition:transform .6s cubic-bezier(.22,1,.36,1)}
.pc-slide{flex:0 0 100%;min-width:100%;display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:clamp(18px,3vw,44px);align-items:stretch;padding:2px}
.pc-photo{position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:14px;
  background:#fff;border:1px solid var(--bv-line);box-shadow:inset 0 0 0 6px #fff,inset 0 0 0 7px rgba(191,216,230,.5);
  min-height:clamp(200px,24vw,280px)}
.pc-photo::after{content:none}
.pc-glow{display:none}
.pc-photo img{position:relative;z-index:2;max-width:98%;max-height:96%;width:auto;height:auto;object-fit:contain;
  filter:drop-shadow(0 24px 26px rgba(2,61,99,.22)) drop-shadow(0 6px 10px rgba(2,61,99,.10))}
.pc-photo.ui{padding:18px}
.pc-photo.ui img{max-width:99.5%;max-height:98%;border:1px solid var(--bv-line);
  filter:drop-shadow(0 18px 32px rgba(2,61,99,.20))}
.pc-slide .prod{box-shadow:none}
.pc-slide .prod:hover{transform:none;box-shadow:none;border-color:var(--bv-line)}
.pc-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:6;
  width:54px;height:54px;border-radius:50%;border:1px solid var(--bv-line);background:rgba(255,255,255,.96);
  color:var(--bv-navy);font-family:var(--font-latin);font-size:30px;line-height:0;display:flex;align-items:center;justify-content:center;
  cursor:pointer;box-shadow:0 14px 30px -14px rgba(2,61,99,.55);transition:background .25s,color .25s,border-color .25s,transform .2s}
.pc-arrow:hover{background:var(--bv-blue);color:#fff;border-color:var(--bv-blue)}
.pc-arrow:active{transform:translateY(-50%) scale(.94)}
.pc-prev{left:4px}
.pc-next{right:4px}
.pc-dots{display:flex;justify-content:center;gap:10px;margin-top:28px}
.pc-dots button{width:9px;height:9px;border-radius:50%;border:0;padding:0;cursor:pointer;background:var(--bv-line);transition:background .3s,width .3s}
.pc-dots button.active{background:var(--bv-blue);width:26px;border-radius:6px}

/* =========================================================
   INSIGHTS / 技術專欄
   ========================================================= */
.insights{background:var(--bv-paper)}
.insights .ins-head{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,60px);align-items:end}
.insights .ins-head .lede{margin-top:0;max-width:46ch;justify-self:end}
.ins-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:clamp(40px,5vw,56px)}
.ins-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--bv-line);overflow:hidden;
  transition:transform .35s cubic-bezier(.2,.7,.2,1),box-shadow .35s,border-color .35s}
.ins-card:hover{transform:translateY(-6px);box-shadow:0 32px 56px -30px rgba(2,61,99,.5);border-color:var(--bv-sky)}
.ins-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--bv-tint-2)}
.ins-thumb img{width:100%;height:100%;object-fit:cover;object-position:center;transition:transform .5s cubic-bezier(.2,.7,.2,1)}
.ins-card:hover .ins-thumb img{transform:scale(1.05)}
.ins-thumb .ins-cat{position:absolute;right:14px;top:14px;font-size:12.5px;font-weight:700;letter-spacing:.04em;
  color:var(--bv-ink);background:var(--bv-orange);padding:6px 13px;border-radius:999px;box-shadow:0 8px 20px -10px rgba(140,75,10,.7)}
.ins-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1}
.ins-body h3{font-size:19.5px;font-weight:900;color:var(--bv-ink);line-height:1.4;letter-spacing:.01em}
.ins-card:hover .ins-body h3{color:var(--bv-blue)}
.ins-body p{font-size:14.5px;color:var(--bv-slate);margin-top:12px;line-height:1.72;text-wrap:pretty;flex:1}
.ins-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:20px;
  padding-top:16px;border-top:1px solid var(--bv-tint-2)}
.ins-meta .rt{font-size:12.5px;font-weight:600;color:var(--bv-slate);letter-spacing:.02em}
.ins-meta .go{font-size:13.5px;font-weight:700;color:var(--bv-blue);transition:transform .25s}
.ins-card:hover .ins-meta .go{transform:translateX(4px)}

/* =========================================================
   INDUSTRIES (dark)
   ========================================================= */
.industries{background:linear-gradient(170deg,#04202F,#021019);color:#fff;overflow:hidden}
.industries .hex{position:absolute;right:6%;top:14%;width:220px;opacity:.12;z-index:0}
.industries .wrap{position:relative;z-index:2}
.ind-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:50px}
.ind{border:1px solid rgba(149,196,224,.2);padding:24px 22px;position:relative;overflow:hidden;
  transition:background .35s,border-color .35s,transform .35s}
.ind:hover{background:rgba(82,187,255,.07);border-color:rgba(82,187,255,.5);transform:translateY(-4px)}
.ind .ih{display:flex;align-items:baseline;justify-content:space-between;gap:10px}
.ind .zh{font-size:23.75px;font-weight:900;color:#fff}
.ind .lt{font-family:var(--font-latin);font-size:13.125px;letter-spacing:.1em;text-transform:uppercase;color:var(--bv-sky);font-weight:600}
.ind .apps{margin-top:14px;display:flex;flex-direction:column;gap:7px}
.ind .apps span{font-size:16.25px;color:#aecbdd;display:flex;align-items:center;gap:8px}
.ind .apps span::before{content:"";width:5px;height:5px;background:var(--bv-sky);flex:none;border-radius:50%}

/* =========================================================
   TIMELINE
   ========================================================= */
.timeline{background:var(--bv-paper);overflow:hidden}

/* ---- horizontal timeline ---- */
.htl{position:relative;margin-top:clamp(34px,4vw,54px)}
.htl-viewport{overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;scrollbar-width:none;
  cursor:grab}
.htl-viewport::-webkit-scrollbar{display:none}
.htl-viewport.grabbing{cursor:grabbing}
.htl-track{position:relative;display:flex;align-items:flex-start;width:max-content;padding:0 clamp(30px,5vw,66px) 8px}
.htl-axis{position:absolute;left:0;right:0;top:64px;height:2px;background:var(--bv-line);z-index:0}
.htl-fill{position:absolute;left:0;top:0;height:100%;width:0;
  background:linear-gradient(90deg,var(--bv-sky),var(--bv-blue));transition:width .12s linear}
.htl-item{position:relative;z-index:1;flex:0 0 clamp(244px,23vw,290px);padding:0 12px}
.htl-year{height:56px;text-align:center;font-family:var(--font-cond);font-weight:700;
  font-size:clamp(28px,3vw,36px);color:var(--bv-blue);line-height:1;padding-top:2px}
.htl-year .span{display:block;font-family:var(--font-latin);font-size:10.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--bv-slate);font-weight:600;margin-top:6px}
.htl-node{position:absolute;top:64px;left:50%;transform:translate(-50%,-50%);width:16px;height:16px;border-radius:50%;
  background:#fff;border:3px solid var(--bv-sky);z-index:3;box-shadow:0 0 0 5px var(--bv-paper);
  transition:background .35s,box-shadow .35s,width .25s,height .25s}
.htl-item.major .htl-node{width:21px;height:21px}
.htl-item.reached .htl-node{background:var(--bv-sky)}
.htl-item.major.reached .htl-node{box-shadow:0 0 0 5px var(--bv-paper),0 0 16px 2px rgba(82,187,255,.6)}
.htl-item::after{content:"";position:absolute;left:50%;top:64px;width:2px;height:30px;background:var(--bv-line);
  transform:translateX(-50%);z-index:1;transition:background .35s}
.htl-item.reached::after{background:var(--bv-sky)}
.htl-card{margin-top:40px;background:#fff;border:1px solid var(--bv-line);padding:18px 20px;
  transition:border-color .35s,box-shadow .35s}
.htl-item.reached .htl-card{border-color:rgba(82,187,255,.55);box-shadow:0 22px 40px -30px rgba(2,61,99,.5)}
.htl-card ul{list-style:none;display:flex;flex-direction:column;gap:8px}
.htl-card li{font-size:14px;color:var(--bv-ink);display:flex;gap:9px;align-items:flex-start;line-height:1.5;text-wrap:pretty}
.htl-card li::before{content:"";width:6px;height:6px;background:var(--bv-sky);margin-top:7px;flex:none;transform:rotate(45deg)}
.htl-card li.hl{font-weight:700;color:var(--bv-blue)}
.htl-arrow{position:absolute;top:42px;transform:translateY(-50%);z-index:6;width:46px;height:46px;border-radius:50%;
  border:1px solid var(--bv-line);background:rgba(255,255,255,.96);color:var(--bv-navy);font-family:var(--font-latin);
  font-size:26px;line-height:0;display:flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:0 14px 30px -16px rgba(2,61,99,.5);transition:background .25s,color .25s,border-color .25s,opacity .25s}
.htl-arrow:hover{background:var(--bv-blue);color:#fff;border-color:var(--bv-blue)}
.htl-prev{left:-4px}.htl-next{right:-4px}
.htl-arrow:disabled{opacity:.3;cursor:default;box-shadow:none}
.htl-arrow:disabled:hover{background:rgba(255,255,255,.96);color:var(--bv-navy);border-color:var(--bv-line)}
@media (prefers-reduced-motion:no-preference){
  .htl-track.js .htl-item{opacity:0;transform:translateY(22px);
    transition:opacity .6s cubic-bezier(.2,.7,.2,1),transform .6s cubic-bezier(.2,.7,.2,1)}
  .htl-track.js.in .htl-item{opacity:1;transform:none}
  .htl-track.js.in .htl-item:nth-child(3){transition-delay:.05s}
  .htl-track.js.in .htl-item:nth-child(4){transition-delay:.1s}
  .htl-track.js.in .htl-item:nth-child(5){transition-delay:.15s}
  .htl-track.js.in .htl-item:nth-child(6){transition-delay:.2s}
  .htl-track.js.in .htl-item:nth-child(7){transition-delay:.25s}
  .htl-track.js.in .htl-item:nth-child(8){transition-delay:.3s}
  .htl-track.js.in .htl-item:nth-child(9){transition-delay:.35s}
}

/* =========================================================
   FAQ / 常見問題
   ========================================================= */
.faq{background:var(--bv-paper)}
.faq-list{margin-top:clamp(36px,4vw,52px);max-width:940px;border-top:1px solid var(--bv-line)}
.faq-item{border-bottom:1px solid var(--bv-line)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:24px 6px;font-size:clamp(16px,1.7vw,19px);font-weight:700;color:var(--bv-ink);line-height:1.5;transition:color .25s}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";flex:none;font-family:var(--font-latin);font-weight:600;font-size:28px;line-height:1;
  color:var(--bv-blue);transition:transform .3s ease}
.faq-item[open] summary{color:var(--bv-blue)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item summary:hover{color:var(--bv-blue)}
.faq-a{padding:0 6px 26px;max-width:74ch}
.faq-a p{font-size:16px;line-height:1.85;color:var(--bv-slate);text-wrap:pretty}
.faq-a ul{margin:12px 0 2px;padding:0;display:flex;flex-direction:column;gap:9px;list-style:none}
.faq-a li{font-size:16px;line-height:1.7;color:var(--bv-slate);display:flex;gap:11px;align-items:flex-start;text-wrap:pretty}
.faq-a li::before{content:"";width:7px;height:7px;background:var(--bv-sky);margin-top:8px;flex:none;transform:rotate(45deg)}
.faq-a li b{color:var(--bv-navy);font-weight:700}
.faq-a ul + p{margin-top:14px}
.faq-a a{color:var(--bv-blue);font-weight:600;border-bottom:1px solid rgba(15,129,202,.35);transition:border-color .2s}
.faq-a a:hover{border-bottom-color:var(--bv-blue)}

/* =========================================================
   CONTACT / CTA
   ========================================================= */
.contact{background:linear-gradient(160deg,#04202F 0%,#03161F 60%,#021019 100%);color:#fff;overflow:hidden}
.contact .dots{position:absolute;right:4%;top:-6%;height:75%;opacity:.2;z-index:0}
.contact .hex{position:absolute;left:-60px;bottom:-60px;width:300px;opacity:.1;z-index:0}
.contact .wrap{position:relative;z-index:2}
.contact .grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(36px,5vw,72px);align-items:start}
.contact h2{font-family:var(--font-zh);font-weight:900;font-size:clamp(30px,4vw,52px);line-height:1.1;color:#fff}
.contact h2 .sub{display:block;font-family:var(--font-latin);font-weight:600;font-size:16px;letter-spacing:.14em;text-transform:uppercase;color:var(--bv-sky);margin-top:12px}
.contact .intro{font-size:17px;color:#bcd9ec;margin-top:22px;max-width:46ch;line-height:1.75}
.contact .info{margin-top:34px;display:flex;flex-direction:column;gap:2px}
.contact .info a,.contact .info div{display:flex;align-items:center;gap:16px;padding:16px 0;border-top:1px solid rgba(149,196,224,.18);font-size:16px;color:#dceaf3;transition:color .25s}
.contact .info a:hover{color:var(--bv-sky)}
.contact .info .lab{font-family:var(--font-latin);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--bv-sky);width:88px;flex:none;font-weight:700}
/* form */
.form{background:rgba(255,255,255,.04);border:1px solid rgba(149,196,224,.22);padding:clamp(26px,3vw,40px);backdrop-filter:blur(8px)}
.form h3{font-size:21px;font-weight:900;color:#fff;margin-bottom:4px}
.form .fnote{font-size:13.5px;color:#8fb6cd;margin-bottom:24px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;font-weight:600;color:#aecbdd;margin-bottom:7px;letter-spacing:.02em}
.field label .req{color:var(--bv-orange)}
.field input,.field select,.field textarea{width:100%;background:rgba(255,255,255,.06);border:1px solid rgba(149,196,224,.28);
  color:#fff;font-family:var(--font-zh);font-size:15px;padding:13px 15px;transition:border-color .25s,background .25s}
.field input::placeholder,.field textarea::placeholder{color:#6f93a8}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--bv-sky);background:rgba(82,187,255,.08)}
.field select{appearance:none;cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2352BBFF' d='M6 8 0 0h12z'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 16px center}
.field select option{background:#04202F;color:#fff}
.field textarea{resize:vertical;min-height:96px}
.form .btn{width:100%;justify-content:center;margin-top:6px}
.form .ok{display:none;text-align:center;padding:36px 10px}
.form .ok.show{display:block}
.form .ok .ico{width:58px;height:58px;border-radius:50%;background:rgba(36,184,168,.18);border:2px solid var(--bv-teal);
  display:flex;align-items:center;justify-content:center;margin:0 auto 18px;color:var(--bv-teal);font-size:30px;font-family:var(--font-latin)}
.form .ok h3{margin-bottom:8px}
.form .ok p{font-size:14.5px;color:#aecbdd}
.form.sent .form-body{display:none}

/* =========================================================
   FOOTER
   ========================================================= */
footer.foot{background:#021019;color:#7fa3b8;border-top:1px solid rgba(149,196,224,.14);padding:40px 0}
footer.foot .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:18px}
footer.foot .fb{display:flex;align-items:center;gap:12px}
footer.foot .fb img{width:30px}
footer.foot .fb b{color:#cfe3ef;font-weight:900;font-size:15px}
footer.foot .fb .lt{font-family:var(--font-latin);font-size:9.5px;letter-spacing:.28em;color:var(--bv-sky);text-transform:uppercase}
footer.foot .ft-right{font-size:13px;text-align:right}
footer.foot a:hover{color:var(--bv-sky)}

/* =========================================================
   FILM / VIDEO
   ========================================================= */
.film{background:linear-gradient(170deg,#04202F,#021019);overflow:hidden}
.film .net{position:absolute;left:-60px;top:8%;width:460px;opacity:.14;z-index:0}
.film .wrap{position:relative;z-index:2}
.video{margin-top:clamp(36px,5vw,56px)}
.video-frame{position:relative;width:100%;aspect-ratio:16/9;border:1px solid rgba(149,196,224,.22);background:#000;
  box-shadow:0 50px 90px -44px rgba(0,0,0,.75)}
.video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0;display:block}
.video-link{display:inline-flex;align-items:center;gap:9px;margin-top:18px;font-size:14.5px;font-weight:600;color:var(--bv-sky);letter-spacing:.02em;transition:color .25s}
.video-link:hover{color:#8fd4ff}
.video-link .ar{font-family:var(--font-latin);transition:transform .25s}
.video-link:hover .ar{transform:translate(3px,-3px)}

/* =========================================================
   PARTNERS (dark) — logo marquee
   ========================================================= */
.partners{background:linear-gradient(170deg,#052230,#03161F);color:#fff;overflow:hidden}
.partners .net{position:absolute;left:50%;top:6%;transform:translateX(-50%);width:560px;opacity:.10;z-index:0}
.partners .wrap-head{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;text-align:center}
.partners .eyebrow{justify-content:center}
.partners .lede{margin-left:auto;margin-right:auto;text-align:center}
.logo-marquee{position:relative;z-index:2;margin-top:clamp(40px,5vw,58px);display:flex;flex-direction:column;gap:22px;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);
          mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.logo-row{overflow:hidden}
.logo-track{display:flex;width:max-content}
.logo-track[data-marquee="left"]{animation:marquee-l 56s linear infinite}
.logo-track[data-marquee="right"]{animation:marquee-r 56s linear infinite}
.logo-marquee:hover .logo-track{animation-play-state:paused}
@keyframes marquee-l{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@keyframes marquee-r{from{transform:translateX(-50%)}to{transform:translateX(0)}}
.logo-cell{flex:0 0 auto;width:200px;height:104px;margin-right:22px;display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--bv-line);padding:12px 16px;box-shadow:0 22px 44px -28px rgba(0,0,0,.65)}
.logo-cell img{max-width:100%;max-height:78px;width:auto;height:auto;object-fit:contain;display:block}
@media (prefers-reduced-motion:reduce){
  .logo-track{animation:none !important}
  .logo-marquee{flex-wrap:wrap}
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width:1080px){
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .ind-grid{grid-template-columns:repeat(2,1fr)}
  .stats .grid{grid-template-columns:repeat(2,1fr)}
  .ins-grid{grid-template-columns:repeat(3,1fr)}
}@media (max-width:1100px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .nav.open .nav-links{display:flex;position:absolute;top:var(--nav-h);left:0;right:0;flex-direction:column;
    background:#04202F;padding:22px var(--gut);gap:18px;border-bottom:1px solid rgba(149,196,224,.2)}
  .nav.open .nav-links a{color:#fff;font-size:17px}
}@media (max-width:860px){
  .hero .wrap{grid-template-columns:1fr;gap:18px}
  .hero-visual{max-width:520px;margin-top:8px}
  .hero-visual .machine{width:100%;margin-left:0}
  .hero{min-height:auto;padding-top:calc(var(--nav-h) + 40px);padding-bottom:60px}
  .who .grid,.contact .grid{grid-template-columns:1fr}
  .insights .ins-head{grid-template-columns:1fr;gap:18px}
  .insights .ins-head .lede{justify-self:start}
  .ins-grid{grid-template-columns:1fr}
  .who .who-visual{order:-1}
  .svc-models,.svc-caps{grid-template-columns:1fr}
  .lede-nowrap{white-space:normal}
  .prod-carousel{padding:0 6px}
  .pc-slide{grid-template-columns:1fr;gap:18px}
  .pc-photo{min-height:clamp(220px,52vw,300px)}
  .pc-arrow{top:calc(clamp(220px,52vw,300px) / 2 + 18px);width:44px;height:44px;font-size:24px}
  .pc-prev{left:6px}
  .pc-next{right:6px}
  .htl-item{flex-basis:228px}
  .htl-arrow{width:40px;height:40px;font-size:22px}
}
@media (max-width:560px){
  .prod-grid,.ind-grid,.stats .grid{grid-template-columns:1fr}
  .hero h1{font-size:clamp(46px,15vw,72px)}
}