/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --green-deep:#0f4a3c;
  --green:#176658;
  --green-light:#2d8a76;
  --green-pale:#e8f2ee;
  --ink:#1a3d35;
  --ink-soft:#4a6b62;
  --paper:#f6f9f6;
  --white:#ffffff;
  --border:#dce8e1;
  --shadow:0 2px 20px rgba(15,74,60,.08);
  --shadow-lg:0 8px 40px rgba(15,74,60,.12);
  --radius:12px;
  --maxw:1100px;
  --font:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --transition:.3s ease;
}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:var(--font);
  background:var(--paper);
  color:var(--ink);
  line-height:1.8;
  overflow-x:hidden;
}
a{color:var(--green);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--green-light)}
img{display:block;max-width:100%;height:auto}

/* ===== Header ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(15,74,60,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:var(--transition);
}
.site-header.scrolled{background:rgba(15,74,60,.98);box-shadow:0 2px 20px rgba(0,0,0,.15)}
.header-inner{
  max-width:var(--maxw);margin:0 auto;padding:0 24px;
  height:68px;display:flex;align-items:center;justify-content:space-between;
}
.logo{display:flex;align-items:center;gap:10px}
.logo img{height:34px;width:auto;filter:brightness(0) invert(1)}
.logo-text{color:#fff;font-size:18px;font-weight:600;letter-spacing:.5px}
.nav-links{display:flex;gap:32px;list-style:none}
.nav-links a{color:#c5ddd4;font-size:15px;font-weight:500;position:relative;padding:4px 0}
.nav-links a:hover{color:#fff}
.nav-links a::after{content:"";position:absolute;bottom:-2px;left:0;width:0;height:2px;background:#fff;transition:width .3s}
.nav-links a:hover::after{width:100%}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px;padding:6px}
.nav-toggle span{width:24px;height:2px;background:#fff;border-radius:2px;transition:var(--transition)}
.nav-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ===== Hero ===== */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  background:url('../hero-BG-06.png') center/cover no-repeat;
  margin-top:0;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(15,74,60,.78) 0%,rgba(23,102,88,.62) 100%);
}
.hero-content{position:relative;z-index:2;max-width:var(--maxw);margin:0 auto;padding:0 24px;width:100%;padding-top:68px}
.hero-tag{color:#a8d4c6;font-size:14px;letter-spacing:2px;text-transform:uppercase;margin-bottom:16px;font-weight:500}
.hero h1{color:#fff;font-size:clamp(32px,5vw,52px);font-weight:700;line-height:1.25;margin-bottom:20px;max-width:680px}
.hero .lead{color:#d3e7df;font-size:clamp(16px,2vw,20px);max-width:560px;margin-bottom:32px}
.hero-vision-mission{display:flex;gap:32px;flex-wrap:wrap;margin-top:8px}
.hero-vm-item{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);border-radius:var(--radius);padding:18px 24px;backdrop-filter:blur(8px)}
.hero-vm-item .label{color:#a8d4c6;font-size:13px;margin-bottom:4px}
.hero-vm-item .value{color:#fff;font-size:18px;font-weight:600}

/* ===== Sections ===== */
.section{padding:80px 24px}
.section-inner{max-width:var(--maxw);margin:0 auto}
.section-eyebrow{color:var(--green-light);font-size:13px;letter-spacing:2px;text-transform:uppercase;font-weight:600;margin-bottom:10px}
.section h2{font-size:clamp(24px,3.5vw,34px);color:var(--green-deep);margin-bottom:24px;line-height:1.3}

/* ===== Name Origin ===== */
.name-origin{background:var(--white)}
.name-origin .section-inner{max-width:760px;text-align:center}
.name-origin p{font-size:17px;color:var(--ink-soft);line-height:2}

/* ===== About ===== */
.about{background:var(--green-pale)}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.about-image{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg);position:sticky;top:90px}
.about-image img{width:100%;height:auto;display:block}
.about-text h2{margin-bottom:8px}
.about-sub{font-size:18px;color:var(--ink-soft);margin-bottom:32px}
.about-block{margin-bottom:32px}
.about-block h3{font-size:20px;color:var(--green);margin-bottom:14px;display:flex;align-items:center;gap:10px}
.about-block h3::before{content:"";width:4px;height:20px;background:var(--green-light);border-radius:2px;display:inline-block}
.about-block p{color:var(--ink-soft);font-size:16px;margin-bottom:14px;line-height:2}
.about-block p:last-child{margin-bottom:0}

/* ===== Industries ===== */
.industries{background:var(--white)}
.industries-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:40px}
.industry-card{
  background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);
  padding:36px 28px;text-align:center;transition:var(--transition);
}
.industry-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--green-light)}
.industry-icon{width:80px;height:80px;margin:0 auto 20px;border-radius:50%;overflow:hidden;background:var(--green-pale);display:flex;align-items:center;justify-content:center}
.industry-icon img{width:48px;height:48px;object-fit:contain}
.industry-card h3{font-size:20px;color:var(--green-deep);margin-bottom:8px}
.industry-card p{font-size:14px;color:var(--ink-soft)}

/* ===== Contact ===== */
.contact{background:var(--green-deep);color:#fff}
.contact .section-eyebrow{color:#7fc4ad}
.contact h2{color:#fff}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;margin-top:40px}
.contact-info p{color:#b5d4ca;font-size:17px;margin-bottom:16px;line-height:1.8}
.contact-email{display:inline-flex;align-items:center;gap:10px;color:#7fc4ad;font-size:20px;font-weight:600;margin-top:8px}
.contact-email:hover{color:#a0d9c8}
.contact-form{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:36px}
.form-group{margin-bottom:20px}
.form-group label{display:block;color:#c5ddd4;font-size:14px;margin-bottom:8px;font-weight:500}
.form-group label .req{color:#7fc4ad}
.form-input{
  width:100%;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);
  border-radius:8px;padding:12px 16px;color:#fff;font-size:15px;font-family:var(--font);
  transition:var(--transition);
}
.form-input::placeholder{color:rgba(255,255,255,.4)}
.form-input:focus{outline:none;border-color:#7fc4ad;background:rgba(255,255,255,.12)}
.form-input.error{border-color:#e8755a}
.form-msg{color:#7fc4ad;font-size:14px;margin-top:12px;display:none}
.form-msg.show{display:block}
.btn-submit{
  width:100%;background:var(--green-light);color:#fff;border:none;border-radius:8px;
  padding:14px;font-size:16px;font-weight:600;font-family:var(--font);cursor:pointer;
  transition:var(--transition);
}
.btn-submit:hover{background:#3a9d86;transform:translateY(-1px)}
.btn-submit:active{transform:translateY(0)}

/* ===== Footer ===== */
.site-footer{background:#0a3528;color:#8aab9f;text-align:center;padding:32px 24px;font-size:14px}
.site-footer a{color:#7fc4ad}

/* ===== Responsive ===== */
@media(max-width:768px){
  .nav-links{
    position:fixed;top:68px;left:0;right:0;flex-direction:column;
    background:rgba(15,74,60,.98);padding:24px;gap:0;display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 0;border-bottom:1px solid rgba(255,255,255,.08)}
  .nav-toggle{display:flex}
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:32px}
  .about-image{position:static}
  .industries-grid{grid-template-columns:1fr;gap:20px}
  .section{padding:56px 20px}
  .hero-vision-mission{flex-direction:column;gap:16px}
}
@media(max-width:480px){
  .hero-content{padding-top:80px;padding-bottom:40px}
  .hero h1{font-size:30px}
  .contact-form{padding:24px}
}