:root{
  --ink:#14181c;
  --paper:#eeece4;
  --paper-alt:#f7f6f1;
  --slate:#46586b;
  --slate-deep:#2c3a48;
  --stone:#9c8868;
  --stone-light:#cabca0;
  --line: rgba(20,24,28,0.14);
  --font-display: 'Newsreader', serif;
  --font-body: 'Inter', sans-serif;
  --maxw: 1120px;
}
body.lang-tc{
  --font-display: 'Newsreader','Noto Serif TC', serif;
  --font-body: 'Inter','Noto Sans TC', sans-serif;
}
body.lang-sc{
  --font-display: 'Newsreader','Noto Serif SC', serif;
  --font-body: 'Inter','Noto Sans SC', sans-serif;
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{
  font-family:var(--font-display);
  font-weight:500;
  color:var(--ink);
  line-height:1.15;
}
a{color:inherit; text-decoration:none;}
.wrap{max-width:var(--maxw); margin:0 auto; padding:0 32px;}
@media(max-width:640px){ .wrap{padding:0 20px;} }

[data-lang]{display:none;}
body.lang-en [data-lang="en"]{display:inline;}
body.lang-tc [data-lang="tc"]{display:inline;}
body.lang-sc [data-lang="sc"]{display:inline;}
body.lang-en [data-lang-block="en"]{display:block;}
body.lang-tc [data-lang-block="tc"]{display:block;}
body.lang-sc [data-lang-block="sc"]{display:block;}

/* ---------- header ---------- */
header{
  position:sticky; top:0; z-index:50;
  background:rgba(238,236,228,0.92);
  backdrop-filter: blur(8px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  height:78px;
}
.logo{
  font-family:var(--font-display);
  font-size:19px;
  letter-spacing:0.02em;
  font-weight:500;
}
.header-right{display:flex; align-items:center; gap:28px;}
.nav-links{display:flex; align-items:center; gap:36px;}
.nav-links a.navlink{font-size:14.5px; color:var(--slate-deep);}
.nav-links a.navlink.current{color:var(--ink); border-bottom:1px solid var(--stone);}
.nav-links a.navlink:hover{color:var(--stone);}
.langswitch{display:flex; gap:2px; border:1px solid var(--line); border-radius:3px; overflow:hidden; flex-shrink:0;}
.langswitch button{
  font-family:var(--font-body); font-size:13px; padding:6px 11px;
  background:transparent; border:none; cursor:pointer; color:var(--slate-deep);
}
.langswitch button.active{background:var(--ink); color:var(--paper-alt);}

.menu-toggle{
  display:none;
  flex-direction:column; justify-content:center; gap:5px;
  width:26px; height:20px; padding:0;
  background:none; border:none; cursor:pointer; flex-shrink:0;
}
.menu-toggle span{
  display:block; width:100%; height:2px; background:var(--ink);
  transition:transform .2s ease, opacity .2s ease;
}
.menu-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.menu-toggle.open span:nth-child(2){opacity:0;}
.menu-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

@media(max-width:760px){
  header{position:sticky;}
  .nav-links{
    display:none;
    position:absolute; top:100%; left:0; right:0;
    background:var(--paper);
    border-bottom:1px solid var(--line);
    flex-direction:column; align-items:stretch; gap:0;
    padding:4px 20px 20px;
  }
  .nav-links.open{display:flex;}
  .nav-links a.navlink{
    padding:15px 0; width:100%; border-top:1px solid var(--line); font-size:16px;
  }
  .nav-links a.navlink.current{border-bottom:none;}
  .menu-toggle{display:flex;}
}

/* ---------- page hero (interior pages) ---------- */
.page-hero{padding:72px 0 56px;}
.page-hero h1{font-size:clamp(30px,4vw,44px); max-width:18ch;}
.page-hero p.lede{margin-top:20px; max-width:52ch; font-size:17px; color:var(--slate-deep);}

/* ---------- home hero ---------- */
.hero{padding:88px 0 96px;}
.hero-grid{
  display:grid; grid-template-columns:1.15fr 0.85fr; gap:64px; align-items:center;
}
@media(max-width:860px){ .hero-grid{grid-template-columns:1fr; gap:48px;} }
.hero h1{
  font-size:clamp(34px,4.6vw,54px);
  max-width:15ch;
}
.hero p.lede{
  margin-top:24px; max-width:46ch; font-size:17.5px; color:var(--slate-deep);
}
.hero .cta-row{margin-top:36px; display:flex; align-items:center; gap:22px; flex-wrap:wrap;}
.btn-primary{
  display:inline-block; background:var(--ink); color:var(--paper-alt);
  padding:13px 26px; font-size:14.5px; border-radius:2px;
  border:1px solid var(--ink); transition:background .18s ease, color .18s ease;
}
.btn-primary:hover{background:transparent; color:var(--ink);}
.link-quiet{font-size:14.5px; color:var(--slate-deep); border-bottom:1px solid var(--line);}
.link-quiet:hover{border-color:var(--ink);}

.mountain-scene{
  position:relative; width:100%; aspect-ratio:4/3.6; border-radius:2px;
  overflow:hidden;
  background:linear-gradient(180deg, var(--slate-deep) 0%, var(--slate) 46%, var(--stone-light) 100%);
}
.mountain-scene.small{aspect-ratio:16/6;}
.sun{
  position:absolute; width:64px; height:64px; border-radius:50%;
  background:var(--paper-alt); opacity:0.9; top:14%; right:20%;
}
.ridge{position:absolute; left:-5%; width:110%; bottom:0;}
.ridge-1{height:38%; background:var(--stone); clip-path:polygon(0% 100%,0% 55%,18% 30%,34% 48%,52% 18%,68% 42%,84% 22%,100% 46%,100% 100%);}
.ridge-2{height:52%; background:var(--stone-light); opacity:0.55; clip-path:polygon(0% 100%,0% 68%,15% 40%,30% 60%,50% 30%,66% 55%,82% 34%,100% 58%,100% 100%);}
.ridge-3{height:26%; background:var(--ink); clip-path:polygon(0% 100%,0% 60%,20% 20%,40% 50%,60% 10%,78% 40%,100% 15%,100% 100%);}

/* ---------- section shell ---------- */
section{padding:88px 0;}
section.tight{padding:56px 0;}
.section-head{max-width:56ch; margin-bottom:52px;}
.section-head h2{font-size:clamp(26px,3vw,34px);}
.section-head p{margin-top:14px; color:var(--slate-deep); font-size:16px;}
.divider-top{border-top:1px solid var(--line);}

/* ---------- services ---------- */
.services-list{
  display:grid; grid-template-columns:1fr 1fr; column-gap:56px;
}
@media(max-width:760px){ .services-list{grid-template-columns:1fr;} }
.service-row{
  padding:22px 0; border-top:1px solid var(--line);
  display:grid; grid-template-columns:1fr; gap:6px;
  transition: opacity .15s ease;
}
.service-row:hover{opacity:0.6;}
.service-row:hover h3{color:var(--stone);}
.t-item:hover{background:var(--paper-alt);}
.services-list > .service-row:nth-last-child(1),
.services-list > .service-row:nth-last-child(2){ border-bottom:1px solid var(--line); }
.service-row h3{font-size:18px; font-weight:500;}
.service-row p{font-size:14.5px; color:var(--slate-deep); max-width:42ch;}

/* ---------- services teaser (home page) ---------- */
.services-teaser{
  display:grid; grid-template-columns:repeat(3,1fr); gap:0;
  border-top:1px solid var(--line); border-left:1px solid var(--line);
}
@media(max-width:760px){ .services-teaser{grid-template-columns:1fr; border-left:none;} }
.services-teaser .t-item{
  padding:22px 24px; border-right:1px solid var(--line); border-bottom:1px solid var(--line);
  font-size:15px;
}
@media(max-width:760px){ .services-teaser .t-item{border-right:none;} }

/* ---------- process ---------- */
.process{background:var(--slate-deep); color:var(--paper-alt);}
.process .section-head p{color:rgba(247,246,241,0.72);}
.process .section-head h2{color:var(--paper-alt);}
.process-row{
  display:grid; grid-template-columns:repeat(4,1fr); gap:0;
  border-top:1px solid rgba(247,246,241,0.22);
}
@media(max-width:820px){ .process-row{grid-template-columns:1fr; } }
.process-step{
  padding:28px 26px 8px 0; border-right:1px solid rgba(247,246,241,0.22);
}
.process-step:last-child{border-right:none;}
@media(max-width:820px){
  .process-step{border-right:none; border-bottom:1px solid rgba(247,246,241,0.22); padding:26px 0;}
  .process-step:last-child{border-bottom:none;}
}
.process-step .num{font-family:var(--font-display); font-size:14px; color:var(--stone-light);}
.process-step h3{color:var(--paper-alt); font-size:18.5px; margin-top:10px;}
.process-step p{margin-top:10px; font-size:14.5px; color:rgba(247,246,241,0.72); max-width:30ch;}

.process-page .process-step h3{color:var(--ink);}
.process-page .process-step p{color:var(--slate-deep);}
.process-page.process{background:transparent; color:var(--ink);}
.process-page .section-head h2{color:var(--ink);}
.process-page .section-head p{color:var(--slate-deep);}
.process-page .process-row{border-top:1px solid var(--line);}
.process-page .process-step{border-right:1px solid var(--line);}
@media(max-width:820px){ .process-page .process-step{border-bottom:1px solid var(--line);} }
.process-page .process-step .num{color:var(--stone);}

/* ---------- why us ---------- */
.why-grid{display:grid; grid-template-columns:1.1fr 0.9fr; gap:64px;}
@media(max-width:820px){ .why-grid{grid-template-columns:1fr; gap:36px;} }
.why-grid h2{font-size:clamp(24px,2.8vw,30px); max-width:16ch;}
.why-grid .body-text{margin-top:20px; color:var(--slate-deep); font-size:16.5px; max-width:48ch;}
.why-list{border-top:1px solid var(--line);}
.why-list .item{
  padding:16px 0; border-bottom:1px solid var(--line);
  display:flex; justify-content:space-between; align-items:baseline; font-size:15px;
}

/* ---------- contact ---------- */
.contact-grid{display:grid; grid-template-columns:0.9fr 1.1fr; gap:64px;}
@media(max-width:820px){ .contact-grid{grid-template-columns:1fr; gap:40px;} }
.contact-grid h2{font-size:clamp(26px,3vw,34px); max-width:14ch;}
.contact-grid p.body-text{margin-top:16px; color:var(--slate-deep); max-width:40ch;}
.contact-detail{margin-top:28px; font-size:15px;}
.contact-detail div{padding:10px 0; border-top:1px solid var(--line);}
.contact-detail div:last-child{border-bottom:1px solid var(--line);}
.contact-detail .label{color:var(--slate); font-size:13px; margin-bottom:3px;}

form{display:flex; flex-direction:column; gap:18px;}
.field label{display:block; font-size:13px; color:var(--slate); margin-bottom:7px;}
.field input, .field textarea{
  width:100%; border:none; border-bottom:1px solid var(--line);
  background:transparent; font-family:var(--font-body); font-size:15.5px;
  padding:8px 2px; color:var(--ink);
}
.field input:focus, .field textarea:focus{outline:none; border-bottom-color:var(--ink);}
.field textarea{resize:vertical; min-height:88px;}
button.submit{
  align-self:flex-start; margin-top:6px; background:var(--ink); color:var(--paper-alt);
  padding:13px 28px; font-size:14.5px; border:1px solid var(--ink); border-radius:2px; cursor:pointer;
}
button.submit:hover{background:transparent; color:var(--ink);}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line); padding:44px 0;}
.footer-inner{display:flex; justify-content:space-between; align-items:flex-start; gap:32px; flex-wrap:wrap;}
footer .logo{font-size:16px;}
footer p.disclaimer{max-width:56ch; font-size:12.5px; color:var(--slate); line-height:1.6;}
footer .copyright{margin-top:16px; font-size:12.5px; color:var(--slate);}

:focus-visible{outline:2px solid var(--stone); outline-offset:2px;}
@media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto;} }