@charset "utf-8";
/* CSS Document */

:root{
  --dark:#111827;
  --dark2:#1f2937;
  --light:#f6f7f9;
  --white:#fff;
  --accent:#d98b32;
  --text:#3c4653;
  --line:#e5e7eb;
  --max:1320px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans TC","Microsoft JhengHei",Arial,sans-serif;
  color:var(--text);
  background:#fff;
  line-height:1.8;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{width:min(var(--max),92%);margin:auto}

/* HEADER */
.header{
  position:fixed; top:0; left:0; width:100%;
  z-index:1000; transition:.35s;
  color:#fff;
}
.header.scrolled{
  background:rgba(17,24,39,.96);
  box-shadow:0 8px 30px rgba(0,0,0,.12);
}
.nav{
  height:88px; display:flex; align-items:center; justify-content:space-between;
}
.logo{
  display:flex; align-items:center; gap:14px;
  font-weight:700; letter-spacing:.05em;
}
.logo-mark{
  width:44px;height:44px;border:1px solid rgba(255,255,255,.55);
  display:grid;place-items:center;font-size:20px;font-weight:800;
}
.logo small{display:block;font-size:10px;letter-spacing:.16em;opacity:.68;font-weight:400}
.menu{display:flex;gap:34px;align-items:center;font-size:14px}
.menu a{position:relative}
.menu a:after{
  content:"";position:absolute;left:0;bottom:-7px;width:0;height:1px;
  background:#fff;transition:.3s;
}
.menu a:hover:after{width:100%}
.menu-btn{display:none;background:none;border:0;color:white;font-size:26px}

/* HERO */
.hero{
  min-height:100vh;
  display:flex;
  align-items:center;
  color:#fff;
  position:relative;
  overflow:hidden;
  background:#0a101a;
}
.hero-slider{
  position:absolute;
  inset:0;
  z-index:0;
}
.hero-slide{
  position:absolute;
  inset:0;
  background-position:center;
  background-size:cover;
  background-repeat:no-repeat;
  opacity:0;
  transform:scale(1.03);
  transition:opacity 1.1s ease, transform 6s ease;
}
.hero-slide.active{
  opacity:1;
  transform:scale(1);
}
.hero-overlay{
  position:absolute;
  inset:0;
  z-index:1;
  background:
    linear-gradient(90deg,rgba(10,16,26,.90) 0%,rgba(10,16,26,.58) 48%,rgba(10,16,26,.25) 100%);
}
.hero:after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:170px;
  z-index:1;
  background:linear-gradient(transparent,rgba(0,0,0,.35));
}
.hero-inner{position:relative;z-index:2;padding-top:70px}
.eyebrow{
  letter-spacing:.28em;text-transform:uppercase;font-size:12px;
  opacity:.75;margin-bottom:18px;
}
.hero h1{
  margin:0;
  font-size:clamp(42px,6.2vw,92px);
  line-height:1.06;
  max-width:900px;
  letter-spacing:-.04em;
}
.hero h1 span{display:block;color:#dca15d}
.hero p{max-width:660px;font-size:18px;opacity:.83;margin:28px 0 36px}
.btn{
  display:inline-flex;align-items:center;gap:18px;
  border:1px solid rgba(255,255,255,.48);padding:14px 24px;
  transition:.3s;font-size:14px;letter-spacing:.1em;
}
.btn:hover{background:#fff;color:#111827}
.scroll-tip{
  position:absolute;right:4%;bottom:38px;z-index:3;
  writing-mode:vertical-rl;font-size:11px;letter-spacing:.2em;opacity:.7;
}

/* SECTIONS */
section{padding:110px 0}
.section-head{
  display:grid;grid-template-columns:1fr 2fr;gap:80px;
  align-items:start;margin-bottom:60px;
}
.kicker{font-size:12px;letter-spacing:.24em;text-transform:uppercase;color:#8b95a3}
.section-head h2{
  font-size:clamp(32px,4vw,58px);line-height:1.15;margin:5px 0;color:#161b22;
}
.section-head p{font-size:17px;margin:0;color:#6b7280}

/* ABOUT */
.about-grid{
  display:grid;grid-template-columns:1.1fr .9fr;gap:34px;
}
.about-photo{
  min-height:540px;min-height:300px; 
  background:url('') center/cover #000;
}
.about-card{
  background:var(--dark);color:#fff;padding:64px;
  display:flex;flex-direction:column;justify-content:space-between;
}
.about-card h3{font-size:32px;line-height:1.3;margin:0 0 25px}
.about-card p{color:#b9c0ca}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:30px;margin-top:50px}
.stat strong{font-size:42px;color:#fff;display:block;line-height:1}
.stat span{font-size:12px;color:#929ba8}

/* SERVICES */
.services{background:var(--light)}
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #d9dde3}
.service-card{
  min-height:340px;padding:36px 28px;border-right:1px solid #d9dde3;
  transition:.35s;position:relative;background:transparent;
}
.service-card:first-child{border-left:1px solid #d9dde3}
.service-card:hover{background:#fff;transform:translateY(-8px);box-shadow:0 18px 45px rgba(0,0,0,.08)}
.num{font-size:12px;color:#9ca3af;margin-bottom:72px}
.service-card h3{font-size:23px;color:#171b22;margin-bottom:15px}
.service-card p{font-size:14px;color:#727b87}
.arrow{position:absolute;bottom:28px;right:28px;font-size:24px}

/* WORKS */
.works-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.work{position:relative;overflow:hidden;aspect-ratio:1.55/1;background:#ddd}
.work img{width:100%;height:100%;object-fit:cover;transition:.6s}
.work:hover img{transform:scale(1.06)}
.work-overlay{
  position:absolute;inset:auto 0 0;padding:35px;color:#fff;
  background:linear-gradient(transparent,rgba(0,0,0,.78));
}
.work-overlay small{opacity:.7}
.work-overlay h3{margin:5px 0 0;font-size:24px}

/* WHY */
.why{background:#151b24;color:#fff}
.why .section-head h2{color:#fff}
.why .section-head p{color:#aab1bb}
.why-grid{border-top:1px solid #39414c}
.why-item{
  display:grid;grid-template-columns:90px 1fr 2fr;
  gap:30px;padding:36px 0;border-bottom:1px solid #39414c;align-items:start;
}
.why-num{color:#818a96}
.why-item h3{margin:0;font-size:22px}
.why-item p{margin:0;color:#aeb5bf}

/* CTA */
.cta{
  padding:140px 0;
  color:#fff;text-align:center;
  background:
    linear-gradient(rgba(15,23,42,.75),rgba(15,23,42,.75)),
    url('appic/foot_bk.jpg?auto=format&fit=crop&w=2000&q=85') center/cover fixed;
}
.cta h2{font-size:clamp(36px,5vw,68px);line-height:1.18;margin:0 0 20px}
.cta p{opacity:.75;margin-bottom:34px}

/* FOOTER */
footer{background:#0b0f15;color:#8f98a5;padding:65px 0 25px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:70px}
.footer-title{color:#fff;font-size:24px;margin-bottom:16px}
.footer-links a{display:block;margin:6px 0}
.copy{border-top:1px solid #242a33;margin-top:55px;padding-top:25px;font-size:12px}

/* reveal */
.reveal{opacity:0;transform:translateY(35px);transition:opacity .8s,transform .8s}
.reveal.show{opacity:1;transform:none}

/* RWD */
@media(max-width:960px){
  .menu{display:none}
  .menu.open{
    display:flex;position:absolute;top:88px;left:0;width:100%;
    flex-direction:column;align-items:flex-start;padding:30px 5%;
    background:#111827;gap:20px;
  }
  .menu-btn{display:block}
  .section-head{grid-template-columns:1fr;gap:20px}
  .about-grid,.footer-grid{grid-template-columns:1fr}
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .works-grid{grid-template-columns:1fr}
  .why-item{grid-template-columns:60px 1fr}
  .why-item p{grid-column:2}
}
@media(max-width:600px){
  .nav{height:72px}
  .hero{min-height:780px}
  .hero p{font-size:15px}
  section{padding:78px 0}
  .about-card{padding:38px 28px}
  .about-photo{min-height:380px}
  .service-grid{grid-template-columns:1fr}
  .service-card{border-left:1px solid #d9dde3}
  .stats{grid-template-columns:1fr 1fr}
  .why-item{grid-template-columns:40px 1fr}
}

/* BACK TO TOP */
#backToTop{
  position:fixed;
  right:28px;
  bottom:28px;
  width:56px;
  height:56px;
  border:1px solid rgba(255,255,255,.28);
  background:rgba(17,24,39,.92);
  color:#fff;
  z-index:999;
  cursor:pointer;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:1px;
  font-size:10px;
  letter-spacing:.08em;
  opacity:0;
  visibility:hidden;
  transform:translateY(15px);
  transition:opacity .3s, visibility .3s, transform .3s, background .3s;
}
#backToTop .top-arrow{
  font-size:18px;
  line-height:1;
}
#backToTop.show{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
#backToTop:hover{
  background:var(--accent);
}
@media(max-width:600px){
  #backToTop{
    right:16px;
    bottom:16px;
    width:50px;
    height:50px;
  }
}


/* LINE FLOAT BUTTON */
#lineFloat{position:fixed;right:28px;bottom:94px;width:56px;height:56px;border:0;border-radius:50%;background:#06C755;color:#fff;z-index:999;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;box-shadow:0 8px 22px rgba(0,0,0,.18);transition:.25s}
#lineFloat:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(0,0,0,.25)}
@media(max-width:600px){#lineFloat{right:16px;bottom:76px;width:50px;height:50px;font-size:12px}}


/* NAV SUBMENU */
.menu-item{
  position:relative;
}
.submenu-toggle{
  appearance:none;
  -webkit-appearance:none;
  border:0;
  background:none;
  color:inherit;
  font:inherit;
  padding:0;
  display:flex;
  align-items:center;
  gap:8px;
  cursor:pointer;
}
.submenu-arrow{
  display:inline-block;
  font-size:16px;
  line-height:1;
  transition:transform .3s ease;
}
.submenu{
  position:absolute;
  top:calc(100% + 18px);
  left:0;
  min-width:190px;
  padding:10px 0;
  background:rgba(17,24,39,.98);
  border:1px solid rgba(255,255,255,.10);
  box-shadow:0 16px 35px rgba(0,0,0,.18);
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:.28s ease;
}
.submenu a{
  display:block;
  padding:10px 18px;
  white-space:nowrap;
  font-size:13px;
}
.submenu a:after{
  display:none;
}
.has-submenu:hover .submenu{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}

/* Mobile: second level slides open inside hamburger menu */
@media(max-width:960px){
  .menu-item{
    width:100%;
  }

  .submenu-toggle{
    width:100%;
    justify-content:space-between;
    color:#fff;
    font-size:14px;
    text-align:left;
  }

  .submenu{
    position:static;
    min-width:0;
    width:100%;
    padding:0;
    margin:0;
    background:rgba(255,255,255,.04);
    border:0;
    box-shadow:none;
    opacity:1;
    visibility:visible;
    transform:none;
    max-height:0;
    overflow:hidden;
    transition:max-height .35s ease, margin .35s ease, padding .35s ease;
  }

  .has-submenu.open .submenu{
    max-height:320px;
    margin-top:10px;
    padding:8px 0;
  }

  .has-submenu.open .submenu-arrow{
    transform:rotate(180deg);
  }

  .submenu a{
    padding:9px 16px 9px 22px;
    font-size:13px;
    color:rgba(255,255,255,.78);
    border-left:1px solid rgba(255,255,255,.14);
  }

  .has-submenu:hover .submenu{
    opacity:1;
    visibility:visible;
    transform:none;
  }
}


/* SERVICE CARD TEXT HOVER EFFECT */
.service-card .num,
.service-card h3,
.service-card p,
.service-card .arrow{
  transition:transform .35s ease, opacity .35s ease, color .35s ease;
}
.service-card .num{transform:translateY(0)}
.service-card h3{transform:translateY(0)}
.service-card p{transform:translateY(8px);opacity:.72}
.service-card .arrow{transform:translate(0,0);z-index:2}
.service-card:hover .num{transform:translateY(-6px);opacity:.45;color:var(--accent)}
.service-card:hover h3{transform:translateY(-8px);color:var(--accent)}
.service-card:hover p{transform:translateY(-2px);opacity:1}
.service-card:hover .arrow{transform:translate(6px,-6px);color:var(--accent)}
.service-card::after{
  content:"";position:absolute;left:28px;bottom:26px;width:0;height:1px;
  background:var(--accent);transition:width .4s ease;
}
.service-card:hover::after{width:58px}


/* ===== 工程實績選單：CSS V 型箭頭水平對齊 ===== */
.submenu-toggle{
  appearance:none;
  -webkit-appearance:none;
  border:0;
  background:none;
  color:inherit;
  font:inherit;
  padding:0;
  display:flex;
  align-items:center;
  gap:9px;
  cursor:pointer;
  line-height:1;
}

.submenu-toggle > span:first-child{
  display:block;
  line-height:1;
}

.submenu-arrow{
  display:block;
  width:7px;
  height:7px;
  border:0;
  border-right:1px solid currentColor;
  border-bottom:1px solid currentColor;
  position:relative;
  top:-2px;
  flex:0 0 auto;
  transform:rotate(45deg);
  transform-origin:center;
  transition:transform .3s ease, top .3s ease;
}

/* 手機第二層展開時箭頭向上 */
.has-submenu.open .submenu-arrow{
  transform:rotate(225deg);
  top:2px;
}


/* ===== 手機版三條線選單：滑出＋漸變 ===== */
@media(max-width:960px){

  .menu{
    display:flex;
    position:absolute;
    top:88px;
    left:0;
    width:100%;
    flex-direction:column;
    align-items:flex-start;
    gap:20px;
    padding:30px 5%;
    background:rgba(17,24,39,.98);

    opacity:0;
    visibility:hidden;
    pointer-events:none;

    transform:translateY(-16px);
    filter:blur(3px);

    transition:
      opacity .35s ease,
      transform .35s ease,
      filter .35s ease,
      visibility .35s;
  }

  .menu.open{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:translateY(0);
    filter:blur(0);
  }

  /* 每個選單項目依序進場 */
  .menu > a,
  .menu > .menu-item{
    opacity:0;
    transform:translateX(-16px);
    transition:
      opacity .35s ease,
      transform .35s ease;
  }

  .menu.open > a,
  .menu.open > .menu-item{
    opacity:1;
    transform:translateX(0);
  }

  .menu.open > :nth-child(1){transition-delay:.05s;}
  .menu.open > :nth-child(2){transition-delay:.10s;}
  .menu.open > :nth-child(3){transition-delay:.15s;}
  .menu.open > :nth-child(4){transition-delay:.20s;}
  .menu.open > :nth-child(5){transition-delay:.25s;}

  /* 收合時不要延遲 */
  .menu:not(.open) > a,
  .menu:not(.open) > .menu-item{
    transition-delay:0s;
  }
}

/* 手機 72px header 對應 */
@media(max-width:600px){
  .menu{
    top:72px;
  }
}


/* ===== 手機版 Header 與展開選單間距 1px ===== */
@media(max-width:960px){
  .menu{
    top:89px; /* Header 88px + 1px */
  }
}

@media(max-width:600px){
  .menu{
    top:73px; /* Header 72px + 1px */
  }
}






/* ===== FOUNDER ===== */
.founder{background:#fff;}
.founder-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;align-items:center;}
.founder-photo{position:relative;min-height:620px;overflow:hidden;background:#e5e7eb;}
.founder-photo img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;object-position: right;}
.founder-photo::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(0,0,0,.26));pointer-events:none;}
.founder-content .kicker{margin-bottom:14px;}
.founder-content h2{margin:0 0 28px;font-size:clamp(32px,4vw,54px);line-height:1.2;color:#161b22;}
.founder-content h2 span{display:block;margin-top:8px;font-size:.48em;font-weight:500;color:#8b95a3;letter-spacing:.08em;}
.founder-timeline{margin-top:32px;border-top:1px solid var(--line);}
.founder-row{display:grid;grid-template-columns:110px 1fr;gap:28px;padding:24px 0;border-bottom:1px solid var(--line);}
.founder-year{font-size:22px;font-weight:700;color:var(--accent);line-height:1.3;}
.founder-text{font-size:16px;color:#4b5563;}
.founder-text strong{color:#1f2937;font-weight:700;}
.founder-highlight{margin-top:32px;padding:26px 28px;background:#f6f7f9;border-left:3px solid var(--accent);font-size:19px;line-height:1.7;color:#222b36;font-weight:600;}
@media(max-width:960px){.founder-wrap{grid-template-columns:1fr;gap:40px}.founder-photo{min-height:520px}}
@media(max-width:600px){.founder-photo{min-height:420px}.founder-row{grid-template-columns:82px 1fr;gap:18px}.founder-year{font-size:18px}.founder-text{font-size:15px}.founder-highlight{font-size:17px;padding:22px 20px}}