:root{
  --navy-900:#0a2e4d;
  --navy-800:#0f4c81;
  --navy-700:#155a96;
  --navy-600:#1c6bb0;
  --blue-accent:#2e8bd9;
  --ink:#101820;
  --ink-soft:#4a5a68;
  --bg:#f6f9fc;
  --bg-soft:#eef3f8;
  --card:#ffffff;
  --border:#dfe7ef;
  --radius:16px;
  --radius-sm:10px;
  --shadow-sm:0 2px 10px rgba(10,46,77,0.08);
  --shadow-md:0 12px 32px rgba(10,46,77,0.14);
  --shadow-lg:0 24px 60px rgba(10,46,77,0.18);
  --transition:0.35s cubic-bezier(.4,0,.2,1);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Noto Sans TC","Segoe UI",system-ui,-apple-system,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px;}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--navy-700);text-transform:uppercase;margin-bottom:12px;
}
h1,h2,h3{font-weight:800;color:var(--navy-900);margin:0;}
.muted{color:var(--ink-soft);font-weight:400;}
.zh{font-weight:600;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-weight:700;font-size:15px;
  cursor:pointer;border:2px solid transparent;transition:var(--transition);
  white-space:nowrap;
}
.btn-primary{background:var(--navy-800);color:#fff;box-shadow:var(--shadow-sm);}
.btn-primary:hover{background:var(--navy-900);transform:translateY(-2px);box-shadow:var(--shadow-md);}
.btn-ghost{background:rgba(255,255,255,0.12);color:#fff;border-color:rgba(255,255,255,0.5);}
.btn-ghost:hover{background:rgba(255,255,255,0.22);}
.btn-outline{background:transparent;color:var(--navy-800);border-color:var(--navy-800);}
.btn-outline:hover{background:var(--navy-800);color:#fff;}

.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,0.85);backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;transition:var(--transition);
}
.header.scrolled{background:rgba(255,255,255,0.97);border-bottom-color:var(--border);box-shadow:var(--shadow-sm);}
.header .wrap{display:flex;align-items:center;justify-content:space-between;height:88px;}
.brand{display:flex;align-items:center;gap:14px;}
.brand img{height:68px;width:auto;}
.brand-name{display:flex;flex-direction:column;line-height:1.2;}
.brand-name .en{font-size:11px;font-weight:800;letter-spacing:.1em;color:var(--navy-700);}
.brand-name .zh{font-size:17px;font-weight:800;color:var(--navy-900);}
.nav{display:flex;align-items:center;gap:32px;}
.nav-links{display:flex;gap:28px;list-style:none;margin:0;padding:0;}
.nav-links a{font-weight:600;font-size:15px;color:var(--ink);position:relative;padding:6px 0;}
.nav-links a:hover{color:var(--navy-800);}
.header-actions{display:flex;align-items:center;gap:14px;}
.nav-toggle{
  display:none;background:none;border:none;width:40px;height:40px;
  align-items:center;justify-content:center;color:var(--navy-900);cursor:pointer;
}

.mobile-nav{
  position:fixed;inset:0;z-index:200;background:#fff;
  transform:translateX(100%);transition:transform .4s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;padding:24px;
}
.mobile-nav.open{transform:translateX(0);}
.mobile-nav-top{display:flex;justify-content:flex-end;}
.mobile-nav-close{background:none;border:none;width:40px;height:40px;color:var(--navy-900);cursor:pointer;}
.mobile-nav-links{display:flex;flex-direction:column;gap:22px;margin:40px 0;flex:1;}
.mobile-nav-links a{font-size:22px;font-weight:700;color:var(--navy-900);}

.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  overflow:hidden;color:#fff;padding-top:88px;
}
.hero-bg{position:absolute;inset:0;z-index:0;}
.hero-bg img{width:100%;height:100%;object-fit:cover;}
.hero-overlay{
  position:absolute;inset:0;z-index:1;
  background:linear-gradient(120deg, rgba(6,26,45,0.94) 0%, rgba(10,46,77,0.88) 45%, rgba(15,76,129,0.55) 100%);
}
.hero .wrap{position:relative;z-index:2;}
.hero-content{max-width:780px;padding:90px 0;}
.hero .eyebrow{color:#9fd0f5;}
.hero h1{font-size:44px;line-height:1.2;margin-bottom:20px;color:#fff;}
.hero h1 .zh{display:block;font-size:24px;margin-top:14px;font-weight:700;color:#dcedfb;}
.hero .lede{font-size:17px;color:#d5e6f4;max-width:640px;margin-bottom:34px;}
.hero-ctas{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:44px;}
.hero-badges{display:flex;gap:14px;flex-wrap:wrap;}
.hero-badge{
  display:flex;align-items:center;gap:8px;font-size:13.5px;font-weight:600;
  background:rgba(255,255,255,0.1);border:1px solid rgba(255,255,255,0.25);
  padding:9px 16px;border-radius:999px;color:#eaf3fb;
}
.hero-badge svg{width:16px;height:16px;flex-shrink:0;}
.scroll-cue{
  position:absolute;bottom:28px;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:6px;
  font-size:12px;color:#cfe3f2;z-index:2;animation:bob 2s ease-in-out infinite;
}
.scroll-cue svg{width:18px;height:18px;}
@keyframes bob{0%,100%{transform:translate(-50%,0);}50%{transform:translate(-50%,8px);}}

.marquee-strip{
  background:var(--navy-900);
  padding:22px 0;overflow:hidden;position:relative;
  border-top:4px solid var(--blue-accent);border-bottom:4px solid var(--blue-accent);
}
.marquee-track{
  display:flex;gap:16px;width:max-content;
  animation:marquee-scroll 55s linear infinite;
}
.marquee-strip:hover .marquee-track{animation-play-state:paused;}
@keyframes marquee-scroll{
  from{transform:translateX(0);}
  to{transform:translateX(-50%);}
}
.marquee-item{
  flex:0 0 auto;width:220px;height:140px;border-radius:var(--radius-sm);
  overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid rgba(255,255,255,0.1);
}
.marquee-item img{width:100%;height:100%;object-fit:cover;}

.about{padding:110px 0;background:var(--bg);}
.about .wrap{display:grid;grid-template-columns:1fr 1.1fr;gap:64px;align-items:center;}
.about-media{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg);}
.about-media img{width:100%;height:520px;object-fit:cover;}
.about-media-tag{
  position:absolute;bottom:20px;left:20px;background:rgba(10,46,77,0.85);
  color:#fff;padding:10px 18px;border-radius:999px;font-size:13px;font-weight:700;
  backdrop-filter:blur(6px);
}
.about-body h2{font-size:34px;margin-bottom:20px;}
.about-body p{color:var(--ink-soft);margin-bottom:16px;font-size:16px;}
.about-points{list-style:none;margin:28px 0 0;padding:0;display:flex;flex-direction:column;gap:18px;}
.about-points li{display:flex;gap:14px;align-items:flex-start;}
.about-points svg{width:24px;height:24px;flex-shrink:0;color:var(--blue-accent);background:var(--bg-soft);border-radius:50%;padding:4px;}
.about-points strong{color:var(--navy-900);font-size:15.5px;}

.services{padding:110px 0;background:var(--bg-soft);}
.section-head{max-width:720px;margin-bottom:56px;}
.section-head.center{margin:0 auto 56px;text-align:center;}
.section-head h2{font-size:32px;margin-bottom:14px;}
.section-head p{color:var(--ink-soft);font-size:16px;}
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-bottom:80px;}
.service-card{
  background:var(--card);border-radius:var(--radius);padding:34px 28px;
  box-shadow:var(--shadow-sm);transition:var(--transition);border:1px solid var(--border);
}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);}
.service-icon{
  width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,var(--navy-800),var(--blue-accent));
  display:flex;align-items:center;justify-content:center;color:#fff;margin-bottom:20px;
}
.service-icon svg{width:28px;height:28px;}
.service-card h3{font-size:19px;margin-bottom:2px;}
.service-card .zh{color:var(--navy-700);font-size:13px;font-weight:700;letter-spacing:.03em;margin-bottom:12px;}
.service-card p{color:var(--ink-soft);font-size:14.5px;margin:0;}

.project-category{margin-bottom:64px;}
.project-category:last-child{margin-bottom:0;}
.project-category h3{font-size:24px;margin-bottom:6px;}
.zh-sub{color:var(--ink-soft);font-size:14px;margin:0 0 24px;}
.gallery-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
}
.gallery-item{
  position:relative;border-radius:var(--radius-sm);overflow:hidden;cursor:pointer;
  box-shadow:var(--shadow-sm);aspect-ratio:4/3;
}
.gallery-item img{
  width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.4,0,.2,1);
}
.gallery-item:hover img{transform:scale(1.15);}
.gallery-item::after{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(to top, rgba(10,46,77,0.35), transparent 60%);
  opacity:0;transition:var(--transition);
}
.gallery-item:hover::after{opacity:1;}

.careers{padding:100px 0;background:var(--bg);}
.careers-panel{
  max-width:680px;margin:0 auto;text-align:center;background:var(--card);
  border-radius:var(--radius);padding:56px 40px;box-shadow:var(--shadow-sm);border:1px solid var(--border);
}
.careers-panel svg{width:52px;height:52px;color:var(--blue-accent);margin-bottom:22px;}
.careers-panel h3{font-size:22px;margin-bottom:14px;}
.careers-panel p{color:var(--ink-soft);margin-bottom:30px;font-size:15.5px;}
.careers-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}

.contact{padding:110px 0;background:var(--navy-900);color:#fff;}
.contact .wrap{display:grid;grid-template-columns:1fr 1fr;gap:64px;}
.contact .eyebrow{color:#9fd0f5;}
.contact-info h2{color:#fff;font-size:32px;margin-bottom:16px;}
.contact-info p{color:#c9dced;margin-bottom:32px;font-size:15.5px;}
.contact-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:24px;}
.contact-list li{display:flex;gap:16px;align-items:flex-start;}
.contact-list .ic{
  width:44px;height:44px;border-radius:12px;background:rgba(255,255,255,0.1);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.contact-list .ic svg{width:20px;height:20px;color:#9fd0f5;}
.contact-list .label{display:block;font-size:12px;font-weight:700;letter-spacing:.06em;color:#8fb8d6;margin-bottom:4px;}
.contact-list .value{font-size:15.5px;font-weight:600;color:#fff;}
.contact-list a:hover{color:#9fd0f5;}
.contact-form{background:#fff;border-radius:var(--radius);padding:36px;color:var(--ink);}
.form-note{font-size:13.5px;color:var(--ink-soft);margin-bottom:20px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px;}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px;}
.field label{font-size:13px;font-weight:700;color:var(--navy-900);}
.field input,.field textarea{
  border:1.5px solid var(--border);border-radius:10px;padding:11px 14px;font-size:14.5px;
  font-family:inherit;transition:var(--transition);
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blue-accent);}
.contact-form .btn-primary{width:100%;margin-top:6px;padding:14px;}

.footer{background:var(--navy-900);color:#c9dced;border-top:1px solid rgba(255,255,255,0.08);padding:56px 0 24px;}
.footer-top{display:flex;justify-content:space-between;gap:40px;margin-bottom:40px;flex-wrap:wrap;}
.footer-brand{display:flex;align-items:center;gap:12px;}
.footer-brand img{height:52px;filter:brightness(0) invert(1);opacity:.9;}
.footer-brand .en{font-size:11px;font-weight:800;letter-spacing:.1em;color:#9fd0f5;}
.footer-brand .zh{font-size:15px;font-weight:800;color:#fff;}
.footer-links{display:flex;gap:64px;}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:14px;}
.footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:#b8d2e8;}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.08);padding-top:22px;
  display:flex;justify-content:space-between;font-size:12.5px;color:#7ea3c2;flex-wrap:wrap;gap:8px;
}

.lightbox{
  position:fixed;inset:0;z-index:1000;background:rgba(6,16,26,0.92);
  display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;
  transition:opacity .3s ease;padding:40px;
}
.lightbox.open{opacity:1;visibility:visible;}
.lightbox-close{
  position:absolute;top:24px;right:28px;background:rgba(255,255,255,0.1);border:none;
  width:44px;height:44px;border-radius:50%;color:#fff;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
}
.lightbox-close svg{width:20px;height:20px;}

@media (max-width:1024px){
  .about .wrap{grid-template-columns:1fr;}
  .about-media img{height:380px;}
  .service-grid{grid-template-columns:1fr 1fr;}
  .gallery-grid{grid-template-columns:repeat(3,1fr);}
  .contact .wrap{grid-template-columns:1fr;}
}
@media (max-width:768px){
  .nav-links,.header-actions{display:none;}
  .nav-toggle{display:none;}
  .header .wrap{height:64px;}
  .brand img{height:40px;}
  .brand-name{flex-direction:row;align-items:center;gap:6px;flex-wrap:nowrap;white-space:nowrap;}
  .brand-name .en{font-size:9px;}
  .brand-name .zh{font-size:13px;}
  .hero{padding-top:110px;}
  .mobile-quicknav{
    display:flex;align-items:center;gap:10px;overflow-x:auto;
    padding:8px 16px 10px;border-top:1px solid var(--border);
    background:rgba(255,255,255,0.97);
  }
  .mobile-quicknav a{
    flex:0 0 auto;font-size:12px;font-weight:600;color:var(--navy-800);
    padding:6px 12px;border-radius:999px;background:var(--bg-soft);white-space:nowrap;
  }
  .mobile-quicknav a.quicknav-cta{background:var(--navy-800);color:#fff;}
  .mobile-nav{display:none;}
  .hero h1{font-size:32px;}
  .hero h1 .zh{font-size:19px;}
  .service-grid{grid-template-columns:1fr;}
  .gallery-grid{grid-template-columns:repeat(2,1fr);}
  .form-row{grid-template-columns:1fr;}
  .footer-top{flex-direction:column;}
  .footer-links{gap:32px;}
}
@media (min-width:769px){
  .mobile-quicknav{display:none;}
}
@media (max-width:480px){
  .gallery-grid{grid-template-columns:1fr 1fr;gap:10px;}
  .marquee-item{width:160px;height:110px;}
}

/* === v2 refinements === */

/* Hero brand highlight gimmick */
.brand-highlight{
  position:relative;
  background:linear-gradient(90deg, #2e8bd9, #5fd0a0, #2e8bd9);
  background-size:200% auto;
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  animation:brand-shine 4s linear infinite;
  font-weight:900;
  letter-spacing:.02em;
}
@keyframes brand-shine{
  0%{background-position:0% center;}
  100%{background-position:200% center;}
}

/* Two-line company name under hero heading */
.zh-lines{display:flex;flex-direction:column;margin-top:14px;gap:4px;}
.zh-line-zh{font-size:24px;font-weight:700;color:#dcedfb;}
.zh-line-en{font-size:16px;font-weight:600;color:#a9c9e0;letter-spacing:.02em;}

/* About section crossfade slideshow */
.about-slideshow{position:relative;width:100%;height:520px;}
.about-slideshow .slide{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  opacity:0;transition:opacity 1.2s ease-in-out;
}
.about-slideshow .slide.active{opacity:1;}

/* Gallery lightbox ease-in scale to ~70% viewport */
.lightbox img{
  width:70vw;height:70vh;object-fit:contain;
  border-radius:8px;box-shadow:0 20px 60px rgba(0,0,0,0.6);
  transform:scale(0.92);opacity:0;
  transition:transform .35s cubic-bezier(.2,.8,.2,1), opacity .3s ease;
}
.lightbox.zoomed img{
  transform:scale(1);opacity:1;
}

/* Header CTA (索取報價) - vivid green */
.header-actions .btn-ghost,
.mobile-nav .btn-primary{
  background:#1fae5c;
  color:#fff;
  border-color:#1fae5c;
}
.header-actions .btn-ghost:hover{
  background:#189249;
  border-color:#189249;
}

/* Hero primary CTA (索取報價或工程查詢) turns green on hover */
.hero-ctas .btn-primary:hover{
  background:#1fae5c;
  box-shadow:0 12px 32px rgba(31,174,92,0.35);
}