:root{
  --green:#1F6B4A;
  --greenDark:#154E37;
  --cream:#F6F1E9;
  --ink:#1F2A24;
  --line:#DCD6C9;
  --muted:#6b7280;
  --shadow:0 8px 24px rgba(0,0,0,.06);
  --shadow-light:0 8px 24px rgba(0,0,0,.05);
  --border-radius:12px;
  --border-radius-lg:16px;
  --border-radius-xl:20px;
}

/* Base styles */
html{scroll-behavior:smooth}
*{box-sizing:border-box}
body{
  margin:0;
  background:linear-gradient(180deg,#FAF7F1 0%,#F6F1E9 100%);
  color:var(--ink);
  font-family:Nunito,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

img{max-width:100%;height:auto;display:block}

/* Layout */
.container{
  max-width:1140px;
  margin:0 auto;
  padding:0 20px;
}

/* Header & Navigation */
.header{
  position:sticky;
  top:0;
  z-index:50;
  background:transparent;
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(150%) blur(6px);
}

.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:10px 0;
  gap:16px;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:20px;
}

.logo-badge{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:8px 12px;
  background:transparent;
  border-radius:var(--border-radius);
  backdrop-filter:blur(4px);
}

.logo-img{height:80px}

.nav-links{
  display:flex;
  gap:18px;
  align-items:center;
  flex-wrap:wrap;
}

.nav-links a{
  text-decoration:none;
  color:var(--ink);
  font-weight:700;
  border-bottom:2px solid transparent;
  transition:color .2s,border-color .2s;
}

.nav-links a:hover,
.nav-links a.active{
  color:var(--green);
  border-bottom-color:var(--green);
}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-weight:800;
  text-decoration:none;
  cursor:pointer;
  border-radius:999px;
  padding:12px 18px;
  border:2px solid transparent;
  transition:all .2s;
}

.btn-primary{
  background:var(--green);
  color:#fff !important;
  font-weight:700;
}

.btn-primary:hover{
  background:var(--greenDark);
  color:var(--cream);
}

.btn-secondary{
  background:transparent;
  color:var(--green);
  border-color:var(--green);
}

.btn-secondary:hover{
  background:#e9f3ee;
}

/* Sections */
.section{
  padding:64px 0;
  scroll-margin-top:84px;
  background:radial-gradient(60% 60% at 8% 8%,rgba(31,107,74,0.13) 0%,rgba(31,107,74,0) 60%),
              linear-gradient(180deg,#FAF7F1 0%,#F6F1E9 100%);
}

/* Typography */
h1{
  font-size:clamp(28px, 5vw, 40px);
  line-height:1.2;
  margin:0 0 12px;
  color:var(--greenDark);
}

h2{
  font-size:clamp(24px, 4vw, 32px);
  margin:0 0 16px;
  color:var(--greenDark);
}

h3{
  font-size:clamp(18px, 3vw, 20px);
  margin:6px 0;
  color:var(--green);
}

.sub{
  font-size:clamp(16px, 2.5vw, 18px);
  margin:0 0 22px;
}

/* Hero Section */
.hero{
  padding:clamp(60px, 10vw, 96px) 0;
  background:transparent;
}

.hero-grid{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:clamp(24px, 4vw, 40px);
  align-items:stretch;
}

.hero-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--border-radius-xl);
  padding:0;
  box-shadow:var(--shadow-light);
  height:320px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--green);
  font-weight:800;
}

/* About Section */
.about-grid{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:24px;
}

.about-visual{
  border:1px solid var(--line);
  border-radius:var(--border-radius-lg);
  background:radial-gradient(60% 60% at 20% 80%,rgba(31,107,74,0.10) 0%,rgba(31,107,74,0) 70%),
              #fff url(assets/hongkong.jpeg) center/cover no-repeat;
  min-height:280px;
}

/* Services */
.service-list{
  display:flex;
  flex-direction:column;
  gap:16px;
}

.card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--border-radius);
  padding:18px;
  transition:transform .2s,box-shadow .2s,border-color .2s;
}

.card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow);
  border-color:var(--green);
}

.service-card{
  display:grid;
  grid-template-columns:240px 1fr;
  gap:12px;
  align-items:start;
}

.svc-media{
  width:100%;
  height:320px;
  background:linear-gradient(180deg,#fff,#f7f7f3);
  border:1px solid var(--line);
  border-radius:var(--border-radius);
  overflow:hidden;
  margin-bottom:10px;
}

.svc-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

.service-desc{
  color:var(--muted);
  margin:4px 0 8px;
}

/* Lists */
ul.clean{
  margin:8px 0 0 0;
  padding:0;
  list-style:disc inside;
}

li+li{margin-top:6px}

/* Contact */
.contact-wrap{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}

.input{
  width:100%;
  padding:12px 14px;
  border:1px solid var(--line);
  border-radius:var(--border-radius);
  background:#fff;
  color:var(--ink);
  font-family:inherit;
}

textarea.input{
  min-height:140px;
  resize:vertical;
}

/* Grid layouts */
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:16px;
}

.svc{
  display:grid;
  grid-template-columns:240px 1fr;
  gap:12px;
  align-items:start;
}

/* Language switcher */
.lang-switch{
  display:flex;
  gap:8px;
  align-items:center;
  margin-left:16px;
}

.lang-btn{
  background:transparent;
  border:1px solid var(--line);
  border-radius:6px;
  padding:4px 8px;
  font-size:12px;
  cursor:pointer;
  transition:all .2s;
  text-decoration:none;
  color:var(--ink);
}

.lang-btn.active{
  background:var(--green);
  color:#fff;
  border-color:var(--green);
}

.lang-btn:hover:not(.active){
  background:var(--cream);
  border-color:var(--green);
}

/* Mobile Navigation */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  gap: 4px;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--green);
  transition: all 0.3s ease;
  border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Responsive Design */
@media(max-width:960px){
  .hero-grid,
  .about-grid,
  .contact-wrap,
  .service-card,
  .svc{
    grid-template-columns:1fr;
  }
  
  .svc-media{
    height:220px;
  }
  
  .grid{
    grid-template-columns:1fr;
  }
  
  .nav-links{
    gap:12px;
  }
  
  .logo-img{
    height:60px;
  }
}

@media(max-width:768px){
  .hamburger {
    display: flex;
  }
  
  .nav-links {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background: linear-gradient(180deg,#FAF7F1 0%,#F6F1E9 100%);
    border-top: 1px solid var(--line);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-links a {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
    width: 100%;
    text-align: center;
  }
  
  .nav-links a:last-child {
    border-bottom: none;
  }
  
  .nav-links .btn {
    margin: 8px 0;
    justify-content: center;
  }
  
  .lang-switch {
    margin: 16px 0 0 0;
    justify-content: center;
  }
  
  .nav {
    position: relative;
  }
}

@media(max-width:640px){
  .container{
    padding:0 16px;
  }
  
  .section{
    padding:48px 0;
  }
  
  .hero{
    padding:48px 0;
  }
  
  .nav{
    padding:8px 0;
  }
  
  .brand{
    margin-left:0;
  }
  
  .logo-img{
    height:50px;
  }
  
  .btn{
    padding:10px 16px;
    font-size:14px;
  }
  
  .card{
    padding:16px;
  }
  
  .contact-wrap{
    gap:20px;
  }
}

/* Accessibility */
@media(prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:0.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0.01ms !important;
  }
  
  html{
    scroll-behavior:auto;
  }
}