:root{
  --ink:#0d2f46;
  --ink-deep:#0a2538;
  --brand:#6ea565;
  --paper:#ffffff;
  --bg:#f2f5f7;
  --line:#d9e3ea;
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family:"Inter","Noto Sans","Noto Sans SC","Noto Sans JP","SF Pro Text","Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink-deep);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

.site-header{
  position:sticky;
  top:0;
  z-index:50;
  box-shadow:0 2px 10px rgba(0,0,0,.14);
  background:transparent;
}

.site-header-inner{
  width:min(1160px,92vw);
  margin:0 auto;
  display:grid;
  grid-template-columns:minmax(300px,40%) 1fr;
}

.brand-side{
  background:#fff;
  display:flex;
  align-items:center;
  padding:12px 20px;
}

.logo-wrap{
  display:inline-flex;
  align-items:center;
  line-height:0;
}

.logo-source{
  display:block;
  height:74px;
  width:auto;
  max-width:100%;
  object-fit:contain;
  object-position:left center;
  filter:none;
  transform:none;
}

.nav-side{
  background:linear-gradient(100deg,var(--ink) 0%,#123b59 100%);
  display:flex;
  align-items:stretch;
  justify-content:space-between;
  padding:0 14px 0 0;
}

nav{
  display:flex;
  align-items:stretch;
  gap:2px;
}

nav a{
  color:#fff;
  text-decoration:none;
  font-size:15px;
  font-weight:600;
  padding:0 14px;
  display:flex;
  align-items:center;
}

nav a.active{
  background:var(--brand);
}

.lang-dropdown{
  position:relative;
  margin:auto 0;
}

.lang-btn{
  width:110px;
  border:1px solid #5d7d92;
  border-radius:6px;
  background:transparent;
  color:#fff;
  padding:7px 10px;
  text-align:left;
  cursor:pointer;
}

.lang-menu{
  position:absolute;
  right:0;
  top:calc(100% + 8px);
  width:160px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:10px;
  box-shadow:0 12px 28px rgba(12,32,68,.16);
  padding:6px;
  display:none;
  z-index:60;
}

.lang-menu.open{display:block}

.lang-menu button{
  width:100%;
  border:0;
  background:transparent;
  text-align:left;
  padding:8px;
  border-radius:6px;
  cursor:pointer;
}

.lang-menu button:hover{background:#f3f7fb}

.hero{
  position:relative;
  min-height:560px;
  background:url('https://images.unsplash.com/photo-1605146769289-440113cc3d00?q=80&w=1800&auto=format&fit=crop') center/cover no-repeat;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
}

.overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(rgba(10,24,36,.5),rgba(10,24,36,.43));
}

.hero-content{
  position:relative;
  color:#fff;
  width:min(1100px,92vw);
  text-shadow:0 2px 10px rgba(0,0,0,.55);
}

.hero-content h1{
  margin:0;
  font-size:48px;
  font-weight:800;
  letter-spacing:.5px;
}

.hero-content h2{
  margin:12px auto 22px;
  font-size:34px;
  line-height:1.25;
  font-weight:700;
}

.quote-btn{
  display:inline-block;
  background:var(--brand);
  color:#fff;
  text-decoration:none;
  font-weight:700;
  border-radius:8px;
  padding:10px 20px;
  font-size:14px;
  box-shadow:0 8px 20px rgba(22,58,31,.28);
}

.usp-wrap{
  width:min(1160px,92vw);
  margin:-72px auto 34px;
  position:relative;
  z-index:3;
}

.usp-strip{
  background:#fff;
  border:1px solid #d8e0e7;
  box-shadow:0 8px 20px rgba(0,0,0,.1);
  display:grid;
  grid-template-columns:repeat(4,1fr);
}

.usp-item{
  padding:22px 16px;
  text-align:center;
  border-right:1px solid #e4ebf1;
}

.usp-item:last-child{border-right:0}

.usp-icon{
  font-size:36px;
  margin-bottom:8px;
}

.usp-item p{
  margin:0;
  font-size:18px;
  line-height:1.4;
  font-weight:600;
}

.section{
  width:min(1160px,92vw);
  margin:0 auto 26px;
}

.section h3{
  text-align:center;
  font-size:40px;
  margin:18px 0 18px;
}

.cards{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}

.card{
  background:#fff;
  border:1px solid #d8e1e8;
  padding:12px;
}

.card img{
  width:100%;
  height:190px;
  object-fit:cover;
  display:block;
}

.card h4{
  margin:10px 0 6px;
  font-size:24px;
}

.card p{
  margin:0;
  font-size:17px;
  line-height:1.55;
  color:#1e3a4d;
}

.project-grid{
  display:grid;
  gap:18px;
}

.project-card{
  background:#fff;
  border:1px solid #d8e1e8;
  padding:14px;
}

.project-card h4{
  margin:4px 0 10px;
  font-size:22px;
}

.before-after{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:12px;
}

.before-after figure{
  margin:0;
}

.before-after img{
  width:100%;
  height:280px;
  object-fit:cover;
  display:block;
}

.before-after figcaption{
  margin-top:6px;
  font-size:14px;
  font-weight:600;
  color:#123b59;
}

.about p{
  margin:0;
  font-size:18px;
  line-height:1.75;
  text-align:center;
}

footer#contact{
  width:100% !important;
  margin:34px 0 0 !important;
  background:linear-gradient(100deg,var(--ink) 0%,var(--ink-deep) 100%);
  color:#fff;
  font-size:16px;
  line-height:1.7;
  padding:24px 0;
  box-sizing:border-box;
}
.footer-inner{
  width:min(1160px,92vw);
  margin:0 auto;
  padding:0 16px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.footer-inner > div:last-child{
  text-align:right;
}

@media (max-width:1120px){
  nav a{font-size:14px;padding:0 10px}
  .hero-content h1{font-size:40px}
  .hero-content h2{font-size:30px}
  .usp-item p{font-size:16px}
  .section h3{font-size:34px}
  .card h4{font-size:22px}
  .card p{font-size:16px}
  .project-card h4{font-size:20px}
  .before-after img{height:230px}
  .about p{font-size:17px}
  footer{font-size:15px}
}

@media (max-width:860px){
  .site-header-inner{grid-template-columns:1fr}
  .brand-side{justify-content:center}
  .logo-source{height:58px}
  .nav-side{padding:10px 12px;gap:8px;flex-wrap:wrap}
  nav{width:100%;justify-content:space-between;flex-wrap:wrap;gap:6px}
  nav a{padding:10px 12px;border-radius:6px}
  .hero{min-height:440px}
  .hero-content h1{font-size:34px}
  .hero-content h2{font-size:28px}
  .usp-wrap{margin:-40px auto 24px}
  .usp-strip{grid-template-columns:1fr 1fr}
  .usp-item{border-right:0;border-bottom:1px solid #e4ebf1}
  .usp-item:nth-last-child(-n+2){border-bottom:0}
  .usp-item p{font-size:20px}
  .section h3{font-size:36px}
  .cards{grid-template-columns:1fr}
  .card img{height:210px}
  .before-after{grid-template-columns:1fr}
  .before-after img{height:220px}
  .project-card h4{font-size:22px}
  .about p{font-size:20px;text-align:left}
  footer{font-size:18px;line-height:1.6}
  .footer-inner{grid-template-columns:1fr}
  .footer-inner > div:last-child{text-align:left}
}