/* ==========================================================================
   CTG INDUSTRIAL — 手寫樣式
   設計規格沿用原站：主色 #004B7C / 輔色 #E2E735 / 容器 1302px
   字型：Exo（標題）、Jura（小標）、Overpass（內文）
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root{
  --primary:#004B7C;
  --primary-2:#0264A4;
  --accent:#E2E735;
  --secondary:#333333;
  --text:#6B6B6B;
  --ink:#1c1c1c;
  --line:#DEDEDE;
  --bg-soft:#F9F7F5;
  --bg-mute:#EDEDED;
  --white:#fff;

  --font-title:"Exo","Helvetica Neue",Arial,sans-serif;
  --font-kicker:"Jura","Helvetica Neue",Arial,sans-serif;
  --font-body:"Overpass","Helvetica Neue",Arial,sans-serif;

  --container:1302px;
  --header-h:80px;
  --radius:4px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:16px;
  font-weight:300;
  line-height:1.5;
  color:var(--text);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;margin:0;padding:0;}
h1,h2,h3,h4,h5{margin:0;font-family:var(--font-title);font-weight:700;color:var(--secondary);line-height:1.2;}
p{margin:0 0 1em;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- 進場動畫（IntersectionObserver 加 is-in） ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* ---------- 按鈕 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 30px;
  font-family:var(--font-kicker);font-size:14px;font-weight:600;
  letter-spacing:3px;text-transform:uppercase;
  border-radius:var(--radius);
  transition:background .25s var(--ease),color .25s var(--ease),transform .2s var(--ease);
}
.btn--primary{background:var(--primary);color:var(--white);}
.btn--primary:hover{background:var(--primary-2);transform:translateY(-2px);}
.btn--accent{background:var(--accent);color:var(--primary);}
.btn--accent:hover{background:#eef37a;transform:translateY(-2px);}
.btn--ghost{background:transparent;color:var(--white);border:1px solid rgba(255,255,255,.55);padding:11px 24px;font-size:12px;}
.btn--ghost:hover{background:var(--white);color:var(--primary);}
.btn--lg{padding:18px 40px;font-size:15px;}

.link-arrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-kicker);font-size:12px;font-weight:600;
  letter-spacing:3px;text-transform:uppercase;color:var(--accent);
}
.link-arrow::after{
  content:'';width:34px;height:1px;background:currentColor;
  transition:width .25s var(--ease);
}
.link-arrow:hover::after{width:50px;}

/* ---------- 頂部聯絡列 ---------- */
.topbar{background:var(--primary);color:rgba(255,255,255,.92);}
.topbar__inner{
  display:flex;flex-wrap:wrap;justify-content:center;gap:10px 34px;
  padding:11px 24px;
  font-family:var(--font-kicker);font-size:13px;font-weight:600;letter-spacing:.6px;
}

/* ---------- 頁首 ---------- */
.header{
  position:sticky;top:0;z-index:100;
  background:var(--white);
  box-shadow:0 1px 0 rgba(0,0,0,.06);
  transition:box-shadow .25s var(--ease);
}
.header.is-stuck{box-shadow:0 4px 18px rgba(0,0,0,.09);}
.header__inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:var(--header-h);}
.header__logo img{width:auto;height:52px;object-fit:contain;}
.header__cta{flex:none;}

/* ---------- 主選單（一般下拉） ---------- */
.nav{position:relative;}
.nav__menu{display:flex;align-items:center;}
.nav__menu > li{position:relative;}
.nav__menu > li > a{
  display:block;line-height:var(--header-h);height:var(--header-h);padding:0 16px;
  font-family:var(--font-title);font-size:16px;color:var(--primary);
  transition:color .2s var(--ease);
}
.nav__menu > li > a:hover,.nav__menu > li:hover > a,.nav__menu > li.is-open > a{color:var(--accent);}
.nav__menu > li.has-sub > a::after{
  content:'';display:inline-block;width:6px;height:6px;margin-left:8px;vertical-align:2px;
  border-right:2px solid currentColor;border-bottom:2px solid currentColor;
  transform:rotate(45deg);transition:transform .2s var(--ease);
}
.nav__menu > li.has-sub:hover > a::after,.nav__menu > li.has-sub.is-open > a::after{transform:rotate(-135deg);}

.nav__sub{
  position:absolute;top:100%;left:0;min-width:225px;
  background:var(--white);border-top:3px solid var(--accent);
  box-shadow:0 10px 26px rgba(0,0,0,.12);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s;
  z-index:110;
}
.nav__menu > li:hover > .nav__sub,.nav__menu > li.is-open > .nav__sub{opacity:1;visibility:visible;transform:none;}
.nav__sub a{
  display:block;padding:12px 18px;font-size:15px;color:var(--primary);
  border-bottom:1px solid rgba(0,75,124,.08);
  transition:background .18s,color .18s,padding-left .18s;
}
.nav__sub li:last-child a{border-bottom:0;}
.nav__sub a:hover{background:var(--primary);color:var(--accent);padding-left:24px;}

.nav__toggle{display:none;width:44px;height:var(--header-h);color:var(--primary);}
.nav__toggle span{display:block;width:26px;height:2px;margin:6px auto;background:currentColor;transition:transform .25s var(--ease),opacity .2s;}
.nav__toggle.is-active span:nth-child(1){transform:translateY(8px) rotate(45deg);}
.nav__toggle.is-active span:nth-child(2){opacity:0;}
.nav__toggle.is-active span:nth-child(3){transform:translateY(-8px) rotate(-45deg);}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:0 0 70px;}
.hero__slideshow{position:absolute;inset:0;z-index:0;}
.hero__slide{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:0;transition:opacity 1s ease-in-out;
}
.hero__slide.is-active{opacity:1;}
to{transform:scale(1.1)}}
.hero__overlay{position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(0,32,55,.62),rgba(0,32,55,.72));}

.hero__inner{position:relative;z-index:2;padding:140px 24px 90px;text-align:center;}
.hero__title{
  font-size:clamp(34px,5.4vw,62px);line-height:1.12;color:var(--white);
  text-transform:capitalize;margin-bottom:18px;
}
.hero__title span{color:var(--accent);}
.hero__lead{max-width:640px;margin:0 auto 34px;color:rgba(255,255,255,.86);font-size:17px;}
.hero__actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:26px;}

.hero__cards{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.fcard{
  display:flex;flex-direction:column;align-items:center;gap:18px;
  padding:34px 20px;text-align:center;
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.16);
  border-radius:var(--radius);
  transition:background .3s var(--ease),transform .3s var(--ease),border-color .3s;
}
.fcard:hover{background:rgba(255,255,255,.14);border-color:var(--accent);transform:translateY(-6px);}
.fcard__icon{width:52px;height:52px;color:var(--white);}
.fcard__icon svg{width:100%;height:100%;}
.fcard__icon--logo img{width:46px;height:46px;object-fit:contain;}
.fcard__title{
  font-family:var(--font-title);font-size:15px;font-weight:700;line-height:1.45;
  text-transform:uppercase;letter-spacing:.6px;color:var(--white);
}

/* ---------- 區塊標題 ---------- */
.sec-head{position:relative;margin-bottom:54px;padding-top:34px;}
.sec-head__ghost{
  position:absolute;top:0;left:-6px;z-index:0;
  font-family:var(--font-title);font-size:clamp(56px,9vw,104px);font-weight:700;
  line-height:.9;letter-spacing:-2px;color:rgba(0,0,0,.055);
  pointer-events:none;user-select:none;
}
.sec-head__kicker{
  position:relative;z-index:1;display:block;margin-bottom:8px;
  font-family:var(--font-kicker);font-size:12px;font-weight:600;
  letter-spacing:3px;text-transform:uppercase;color:var(--primary);
}
.sec-head__title{position:relative;z-index:1;font-size:clamp(28px,3.6vw,38px);color:var(--ink);}
.sec-head__title em{font-style:normal;color:var(--primary);}
.sec-head__link{position:absolute;right:0;bottom:4px;color:var(--secondary);}
.sec-head__link:hover{color:var(--primary);}

/* ---------- 服務卡片 ---------- */
.services{padding:96px 0;background:var(--white);}
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.svc{
  position:relative;min-height:290px;overflow:hidden;border-radius:var(--radius);
  background-size:cover;background-position:center;
  display:flex;align-items:flex-end;
}
.svc--wide{grid-column:span 2;min-height:340px;}
.svc::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(0,32,55,.15),rgba(0,32,55,.82));
  transition:background .35s var(--ease);
}
.svc:hover::before{background:linear-gradient(180deg,rgba(0,75,124,.35),rgba(0,32,55,.9));}
.svc__body{position:relative;z-index:1;padding:30px;color:var(--white);}
.svc__title{font-size:26px;color:var(--white);margin-bottom:10px;}
.svc__title--sm{font-size:20px;}
.svc__desc{font-size:15px;color:rgba(255,255,255,.84);margin-bottom:18px;max-width:46ch;}

/* ---------- 數據 ---------- */
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;margin-top:70px;text-align:center;}
.stat__num{
  display:block;font-family:var(--font-title);font-size:clamp(38px,5vw,58px);font-weight:700;
  line-height:1;color:var(--bg-mute);
}
.stat__label{display:block;margin-top:10px;font-family:var(--font-title);font-size:17px;font-weight:700;color:var(--primary);}

/* ---------- 產品輪播 ---------- */
.products{padding:96px 0 104px;background:var(--bg-soft);}
.carousel{position:relative;margin-top:10px;}
.carousel__viewport{overflow:hidden;}
.carousel__track{display:flex;transition:transform .8s var(--ease);will-change:transform;}
.slide{flex:0 0 100%;min-width:0;padding:0 12px;}

.prod-grid{
  display:grid;gap:10px;
  grid-template-columns:repeat(5,1fr);   /* 標籤卡 + 4 張圖，一列排開 */
  grid-auto-rows:330px;                  /* 每一行等高 */
}
.prod{margin:0;overflow:hidden;border-radius:var(--radius);background:var(--white);}
.prod img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease);}
.prod:hover img{transform:scale(1.06);}
.prod--tall{grid-row:auto;}   /* 一律等高，不跨列 */
.prod--label{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;
  background:var(--white);text-align:center;padding:24px 16px;
}
.prod--label h3{font-size:21px;color:var(--secondary);letter-spacing:.5px;}

.carousel__arrow{
  position:absolute;top:50%;transform:translateY(-50%);z-index:5;
  width:44px;height:44px;display:grid;place-items:center;
  background:var(--accent);color:var(--primary);border-radius:var(--radius);
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.carousel__arrow:hover{background:var(--primary);color:var(--accent);}
.carousel__arrow svg{width:20px;height:20px;}
.carousel__arrow--prev{left:6px;}
.carousel__arrow--next{right:6px;}

.carousel__dots{display:flex;justify-content:center;gap:9px;margin-top:26px;}
.carousel__dots button{width:10px;height:10px;border-radius:50%;background:rgba(0,75,124,.24);transition:background .2s,transform .2s;}
.carousel__dots button.is-active{background:var(--primary);transform:scale(1.3);}

/* ---------- 品質訴求 ---------- */
.quality{position:relative;background-size:cover;background-position:center;background-attachment:fixed;}
.quality__overlay{position:absolute;inset:0;background:rgba(0,40,68,.78);}
.quality__inner{position:relative;z-index:1;padding:110px 24px;text-align:center;}
.quality__title{
  max-width:960px;margin:0 auto 34px;
  font-size:clamp(25px,3.4vw,38px);line-height:1.34;color:var(--white);
}

/* ---------- 製程環形圖 ---------- */
.process{padding:96px 0 110px;background:var(--white);}
.circle{
  position:relative;width:min(640px,92vw);aspect-ratio:1;margin:20px auto 0;
}
.circle__ring{position:absolute;border-radius:50%;}
.circle__ring--outer{inset:0;border:1px solid rgba(226,231,53,.85);}
.circle__ring--inner{inset:11%;border:2px dotted rgba(0,75,124,.55);}

.circle__nodes{position:absolute;inset:11%;}
.circle__node{
  position:absolute;width:54px;height:54px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--white);color:var(--primary);
  font-family:var(--font-title);font-size:16px;font-weight:700;
  box-shadow:0 3px 14px rgba(10,30,80,.16);
  transition:transform .25s var(--ease),background .25s,color .25s,box-shadow .25s;
}
.circle__node:hover{transform:scale(1.1);}
.circle__node.is-active{background:var(--primary);color:var(--accent);box-shadow:0 6px 20px rgba(0,75,124,.34);}

.circle__panels{position:absolute;inset:22%;display:grid;place-items:center;}
.circle__panel{
  grid-area:1/1;margin:0;width:100%;height:100%;
  display:grid;place-items:center;
  opacity:0;visibility:hidden;transform:scale(.94);
  transition:opacity .45s var(--ease),transform .45s var(--ease),visibility .45s;
}
.circle__panel.is-active{opacity:1;visibility:visible;transform:none;}
.circle__panel img{max-width:100%;max-height:100%;object-fit:contain;}

/* ---------- 頁尾 ---------- */
.footer{background:var(--primary);color:rgba(255,255,255,.82);padding-top:70px;}
.footer__top{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:22px;
  padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.16);
}
.footer__slogan{font-size:clamp(25px,3.2vw,34px);color:var(--white);}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:38px;padding:52px 24px;}
.footer__title{
  margin-bottom:18px;font-family:var(--font-kicker);font-size:13px;font-weight:600;
  letter-spacing:3px;text-transform:uppercase;color:var(--accent);
}
.footer__addr{font-style:normal;line-height:1.8;margin-bottom:14px;}
.footer__line{margin:0 0 6px;font-size:15px;}
.footer__list li{margin-bottom:11px;}
.footer__list a{font-size:15px;transition:color .2s,padding-left .2s;}
.footer__list a:hover{color:var(--accent);padding-left:5px;}
.footer__bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:22px 24px 30px;border-top:1px solid rgba(255,255,255,.14);
  font-size:13px;
}
.footer__bottom a:hover{color:var(--accent);}

/* ---------- 回到頂端 ---------- */
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:90;
  width:44px;height:44px;display:grid;place-items:center;
  background:var(--primary);color:var(--accent);border-radius:var(--radius);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s,visibility .25s,transform .25s,background .2s;
}
.to-top.is-show{opacity:1;visibility:visible;transform:none;}
.to-top:hover{background:var(--primary-2);}
.to-top svg{width:20px;height:20px;}

/* ==========================================================================
   RWD（斷點沿用原站 1025 / 768）
   ========================================================================== */
@media (max-width:1100px){
  .hero__cards{grid-template-columns:repeat(2,1fr);}
  .svc-grid{grid-template-columns:repeat(2,1fr);}
  .svc--wide{grid-column:span 2;}
  .stats{grid-template-columns:repeat(3,1fr);row-gap:38px;}
  .footer__grid{grid-template-columns:1fr 1fr;}
}

@media (max-width:1025px){
  /* 平板：3 欄，仍維持每行等高 */
  .prod-grid{grid-template-columns:repeat(3,1fr);grid-auto-rows:240px;}
  .prod--label{padding:20px 16px;}
}

@media (max-width:768px){
  .topbar__inner{gap:6px 20px;font-size:12px;}
  .nav__toggle{display:block;}
  .header__cta{display:none;}
  .nav__menu{
    display:none;flex-direction:column;align-items:stretch;
    position:absolute;top:var(--header-h);left:0;right:0;
    background:var(--white);box-shadow:0 12px 26px rgba(0,0,0,.14);
    max-height:calc(100vh - var(--header-h));overflow-y:auto;
  }
  .nav.is-open .nav__menu{display:flex;}
  .nav__menu > li > a{line-height:1.4;height:auto;padding:16px 20px;border-bottom:1px solid rgba(0,75,124,.08);}
  .nav__sub{
    position:static;opacity:1;visibility:visible;transform:none;display:none;
    min-width:0;box-shadow:none;border-top:0;background:rgba(0,75,124,.04);
  }
  .nav__menu > li.is-open > .nav__sub{display:block;}
  .nav__sub a{padding-left:36px;}

  .hero__inner{padding:90px 24px 70px;}
  .hero__cards{grid-template-columns:1fr;}
  .svc-grid{grid-template-columns:1fr;}
  .svc--wide{grid-column:auto;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .sec-head__link{position:static;display:inline-flex;margin-top:16px;}
  .prod-grid{grid-template-columns:1fr;grid-auto-rows:240px;}
  .quality{background-attachment:scroll;}
  .quality__inner{padding:72px 24px;}
  .footer__grid{grid-template-columns:1fr;gap:30px;}
  .circle__node{width:44px;height:44px;font-size:14px;}
  .to-top{right:14px;bottom:14px;}
}