/* ===== CSS Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  color:#2C2C2C;
  background:#F7F5F0;
  line-height:1.7;
  font-size:16px;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .3s ease}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
h1,h2,h3,h4{font-family:'Noto Serif SC',serif;font-weight:700;line-height:1.3}

/* ===== Color Tokens ===== */
:root{
  --green-deep:#1B5E3F;
  --green-darker:#144A30;
  --green-light:#236B4A;
  --green-pale:#E8F0EB;
  --amber:#D4A24C;
  --amber-light:#E8C47A;
  --warm-white:#F7F5F0;
  --dark:#2C2C2C;
  --gray:#6B6B6B;
  --gray-light:#E8E5DE;
  --white:#FFFFFF;
}

/* ===== Layout ===== */
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:90px 0}
.section-title{text-align:center;margin-bottom:60px}
.section-title .eyebrow{
  display:inline-block;
  font-size:14px;
  letter-spacing:4px;
  color:var(--amber);
  text-transform:uppercase;
  margin-bottom:12px;
  font-weight:500;
}
.section-title h2{
  font-size:38px;
  color:var(--green-darker);
  margin-bottom:16px;
}
.section-title p{
  font-size:16px;
  color:var(--gray);
  max-width:640px;
  margin:0 auto;
}

/* ===== Signature: Paint Flow Divider ===== */
.paint-flow{
  height:6px;
  background:linear-gradient(90deg,
    var(--green-darker) 0%,
    var(--green-deep) 25%,
    var(--green-light) 50%,
    var(--amber) 75%,
    var(--amber-light) 100%);
  position:relative;
  overflow:hidden;
}
.paint-flow::after{
  content:'';
  position:absolute;
  top:0;left:-100%;
  width:100%;height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.4),transparent);
  animation:flowShine 4s ease-in-out infinite;
}
@keyframes flowShine{
  0%{left:-100%}
  100%{left:100%}
}

/* ===== Header / Navigation ===== */
.header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1000;
  background:rgba(255,255,255,.97);
  backdrop-filter:blur(12px);
  box-shadow:0 1px 0 rgba(0,0,0,.06);
  transition:box-shadow .3s ease;
}
.header.scrolled{box-shadow:0 2px 20px rgba(0,0,0,.1)}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:76px;
}
.logo{
  display:flex;
  align-items:center;
  gap:12px;
}
.logo-mark{
  width:44px;height:44px;
  background:linear-gradient(135deg,var(--green-deep),var(--green-light));
  border-radius:8px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  font-family:'Noto Serif SC',serif;
  font-weight:900;
  font-size:20px;
  position:relative;
  overflow:hidden;
}
.logo-mark::after{
  content:'';
  position:absolute;
  bottom:0;left:0;right:0;
  height:3px;
  background:var(--amber);
}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo-text .cn{font-family:'Noto Serif SC',serif;font-weight:700;font-size:17px;color:var(--green-darker)}
.logo-text .en{font-size:10px;letter-spacing:1.5px;color:var(--gray);text-transform:uppercase}

.nav{display:flex;align-items:center;gap:8px}
.nav a{
  padding:8px 16px;
  font-size:15px;
  font-weight:500;
  color:var(--dark);
  border-radius:6px;
  transition:all .3s ease;
  position:relative;
}
.nav a:hover{color:var(--green-deep)}
.nav a.active{
  color:var(--green-deep);
  background:var(--green-pale);
}
.nav a.active::after{
  content:'';
  position:absolute;
  bottom:-2px;left:50%;
  transform:translateX(-50%);
  width:20px;height:2px;
  background:var(--amber);
  border-radius:2px;
}
.header-phone{
  display:flex;
  align-items:center;
  gap:8px;
  padding:10px 20px;
  background:linear-gradient(135deg,var(--green-deep),var(--green-light));
  color:#fff;
  border-radius:8px;
  font-weight:600;
  font-size:15px;
  transition:transform .3s ease,box-shadow .3s ease;
}
.header-phone:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(27,94,63,.3)}
.header-phone svg{width:18px;height:18px;flex-shrink:0}

.mobile-menu-btn{
  display:none;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
}
.mobile-menu-btn span{
  width:24px;height:2px;
  background:var(--dark);
  border-radius:2px;
  transition:all .3s ease;
}

/* ===== Hero ===== */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;
  align-items:center;
  padding-top:76px;
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  inset:0;
  z-index:0;
}
.hero-bg img{
  width:100%;height:100%;
  object-fit:cover;
}
.hero-bg::before{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(20,74,48,.92) 0%,rgba(27,94,63,.75) 50%,rgba(20,74,48,.6) 100%);
  z-index:1;
}
.hero-content{
  position:relative;
  z-index:2;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  width:100%;
}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 18px;
  background:rgba(212,162,76,.15);
  border:1px solid rgba(212,162,76,.4);
  border-radius:30px;
  color:var(--amber-light);
  font-size:14px;
  margin-bottom:28px;
  backdrop-filter:blur(4px);
}
.hero-tag .dot{
  width:8px;height:8px;
  background:var(--amber);
  border-radius:50%;
  animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.5;transform:scale(1.3)}
}
.hero h1{
  font-size:54px;
  color:#fff;
  font-weight:900;
  line-height:1.2;
  margin-bottom:24px;
  max-width:760px;
}
.hero h1 .highlight{
  color:var(--amber-light);
  position:relative;
  display:inline-block;
}
.hero h1 .highlight::after{
  content:'';
  position:absolute;
  bottom:4px;left:0;right:0;
  height:8px;
  background:rgba(212,162,76,.25);
  z-index:-1;
  border-radius:4px;
}
.hero-sub{
  font-size:19px;
  color:rgba(255,255,255,.85);
  max-width:620px;
  margin-bottom:40px;
  line-height:1.8;
}
.hero-cta{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
}
.btn-primary{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:16px 36px;
  background:linear-gradient(135deg,var(--amber),var(--amber-light));
  color:var(--green-darker);
  font-weight:700;
  font-size:16px;
  border-radius:8px;
  transition:all .3s ease;
  box-shadow:0 4px 20px rgba(212,162,76,.3);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 30px rgba(212,162,76,.45)}
.btn-outline{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:16px 36px;
  border:2px solid rgba(255,255,255,.4);
  color:#fff;
  font-weight:600;
  font-size:16px;
  border-radius:8px;
  transition:all .3s ease;
  backdrop-filter:blur(4px);
}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.1)}

.hero-stats{
  display:flex;
  gap:48px;
  margin-top:64px;
  flex-wrap:wrap;
}
.hero-stat{color:#fff}
.hero-stat .num{
  font-family:'Noto Serif SC',serif;
  font-size:42px;
  font-weight:900;
  color:var(--amber-light);
  line-height:1;
}
.hero-stat .label{
  font-size:14px;
  color:rgba(255,255,255,.7);
  margin-top:8px;
  letter-spacing:1px;
}

/* ===== Page Header (inner pages) ===== */
.page-header{
  padding:140px 0 70px;
  background:linear-gradient(135deg,var(--green-darker),var(--green-deep));
  position:relative;
  overflow:hidden;
}
.page-header::before{
  content:'';
  position:absolute;
  bottom:0;left:0;right:0;
  height:6px;
  background:linear-gradient(90deg,var(--green-darker),var(--green-deep),var(--green-light),var(--amber),var(--amber-light));
}
.page-header h1{
  color:#fff;
  font-size:42px;
  margin-bottom:16px;
}
.page-header p{
  color:rgba(255,255,255,.8);
  font-size:17px;
  max-width:700px;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:rgba(255,255,255,.6);
  margin-bottom:20px;
}
.breadcrumb a{color:rgba(255,255,255,.6)}
.breadcrumb a:hover{color:var(--amber-light)}
.breadcrumb .sep{opacity:.5}

/* ===== Products Grid ===== */
.products-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.product-card{
  background:var(--white);
  border-radius:12px;
  overflow:hidden;
  box-shadow:0 4px 20px rgba(0,0,0,.06);
  transition:all .4s ease;
  border:1px solid var(--gray-light);
}
.product-card:hover{
  transform:translateY(-8px);
  box-shadow:0 16px 40px rgba(27,94,63,.15);
  border-color:var(--green-light);
}
.product-card-img{
  height:200px;
  overflow:hidden;
  position:relative;
}
.product-card-img img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .6s ease;
}
.product-card:hover .product-card-img img{transform:scale(1.08)}
.product-card-img .badge{
  position:absolute;
  top:12px;left:12px;
  padding:4px 12px;
  background:var(--green-deep);
  color:#fff;
  font-size:12px;
  border-radius:4px;
  font-weight:500;
}
.product-card-body{padding:24px}
.product-card-body h3{
  font-size:20px;
  color:var(--green-darker);
  margin-bottom:10px;
}
.product-card-body p{
  font-size:14px;
  color:var(--gray);
  line-height:1.7;
  margin-bottom:16px;
}
.product-card-body .tags{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
}
.product-card-body .tags span{
  padding:3px 10px;
  background:var(--green-pale);
  color:var(--green-deep);
  font-size:12px;
  border-radius:4px;
}
.product-card-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-top:16px;
  color:var(--amber);
  font-weight:600;
  font-size:14px;
}
.product-card-link svg{width:16px;height:16px;transition:transform .3s ease}
.product-card:hover .product-card-link svg{transform:translateX(4px)}

/* ===== Advantages ===== */
.advantages{background:var(--white)}
.advantages-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:32px;
}
.advantage-item{
  text-align:center;
  padding:36px 24px;
  border-radius:12px;
  transition:all .3s ease;
  position:relative;
}
.advantage-item:hover{background:var(--green-pale)}
.advantage-icon{
  width:72px;height:72px;
  margin:0 auto 24px;
  background:linear-gradient(135deg,var(--green-pale),#fff);
  border:2px solid var(--green-light);
  border-radius:16px;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:all .3s ease;
}
.advantage-item:hover .advantage-icon{
  background:linear-gradient(135deg,var(--green-deep),var(--green-light));
  border-color:var(--green-deep);
  transform:rotate(-5deg) scale(1.05);
}
.advantage-icon svg{width:36px;height:36px;stroke:var(--green-deep);transition:stroke .3s ease}
.advantage-item:hover .advantage-icon svg{stroke:#fff}
.advantage-item h3{
  font-size:19px;
  color:var(--green-darker);
  margin-bottom:12px;
}
.advantage-item p{
  font-size:14px;
  color:var(--gray);
  line-height:1.8;
}

/* ===== Application Scenarios ===== */
.scenarios-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.scenario-card{
  position:relative;
  height:340px;
  border-radius:12px;
  overflow:hidden;
  cursor:pointer;
}
.scenario-card img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .6s ease;
}
.scenario-card:hover img{transform:scale(1.1)}
.scenario-overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(to top,rgba(20,74,48,.95) 0%,rgba(20,74,48,.3) 60%,transparent 100%);
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  padding:28px;
  transition:background .3s ease;
}
.scenario-card:hover .scenario-overlay{background:linear-gradient(to top,rgba(20,74,48,.98) 0%,rgba(27,94,63,.5) 70%,transparent 100%)}
.scenario-overlay h3{
  color:#fff;
  font-size:22px;
  margin-bottom:8px;
}
.scenario-overlay p{
  color:rgba(255,255,255,.8);
  font-size:14px;
  line-height:1.7;
}

/* ===== CTA Band ===== */
.cta-band{
  background:linear-gradient(135deg,var(--green-darker),var(--green-deep));
  padding:70px 0;
  position:relative;
  overflow:hidden;
}
.cta-band::before{
  content:'';
  position:absolute;
  top:-50%;right:-10%;
  width:500px;height:500px;
  background:radial-gradient(circle,rgba(212,162,76,.15),transparent 70%);
  border-radius:50%;
}
.cta-band-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  flex-wrap:wrap;
  position:relative;
  z-index:1;
}
.cta-band-text h2{
  color:#fff;
  font-size:32px;
  margin-bottom:12px;
}
.cta-band-text p{
  color:rgba(255,255,255,.8);
  font-size:16px;
}
.cta-band-phone{
  display:flex;
  align-items:center;
  gap:16px;
}
.cta-band-phone .phone-num{
  font-family:'Noto Serif SC',serif;
  font-size:36px;
  font-weight:900;
  color:var(--amber-light);
}

/* ===== Product Detail ===== */
.product-detail-section{padding:70px 0}
.product-detail{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:60px;
  align-items:center;
  margin-bottom:80px;
}
.product-detail:nth-child(even){direction:rtl}
.product-detail:nth-child(even)>*{direction:ltr}
.product-detail-img{
  border-radius:12px;
  overflow:hidden;
  box-shadow:0 8px 30px rgba(0,0,0,.12);
  height:420px;
}
.product-detail-img img{width:100%;height:100%;object-fit:cover}
.product-detail-info .product-label{
  display:inline-block;
  padding:6px 16px;
  background:var(--green-pale);
  color:var(--green-deep);
  font-size:13px;
  font-weight:600;
  border-radius:4px;
  margin-bottom:16px;
  letter-spacing:1px;
}
.product-detail-info h2{
  font-size:32px;
  color:var(--green-darker);
  margin-bottom:20px;
}
.product-detail-info .desc{
  font-size:16px;
  color:var(--gray);
  line-height:1.9;
  margin-bottom:28px;
}
.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.feature-item{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:14px;
  color:var(--dark);
}
.feature-item svg{
  width:20px;height:20px;
  stroke:var(--amber);
  flex-shrink:0;
  margin-top:2px;
}
.product-application{
  margin-top:28px;
  padding-top:24px;
  border-top:1px solid var(--gray-light);
}
.product-application h4{
  font-size:15px;
  color:var(--green-darker);
  margin-bottom:12px;
}
.product-application .app-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.product-application .app-tags span{
  padding:5px 14px;
  background:var(--warm-white);
  border:1px solid var(--gray-light);
  border-radius:20px;
  font-size:13px;
  color:var(--gray);
}

/* ===== About ===== */
.about-hero{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:60px;
  align-items:center;
  margin-bottom:80px;
}
.about-hero-img{
  border-radius:12px;
  overflow:hidden;
  box-shadow:0 8px 30px rgba(0,0,0,.12);
  height:460px;
  position:relative;
}
.about-hero-img img{width:100%;height:100%;object-fit:cover}
.about-hero-img::after{
  content:'';
  position:absolute;
  bottom:-20px;right:-20px;
  width:120px;height:120px;
  border:4px solid var(--amber);
  border-radius:12px;
  z-index:-1;
}
.about-text h2{
  font-size:34px;
  color:var(--green-darker);
  margin-bottom:24px;
}
.about-text p{
  font-size:16px;
  color:var(--gray);
  line-height:1.9;
  margin-bottom:18px;
}
.about-text .highlight-box{
  padding:20px 24px;
  background:var(--green-pale);
  border-left:4px solid var(--amber);
  border-radius:0 8px 8px 0;
  margin-top:24px;
}
.about-text .highlight-box p{
  color:var(--green-darker);
  font-weight:500;
  margin-bottom:0;
  font-size:15px;
}

.timeline-section{background:var(--white)}
.timeline{
  position:relative;
  max-width:800px;
  margin:0 auto;
  padding-left:40px;
}
.timeline::before{
  content:'';
  position:absolute;
  left:12px;top:0;bottom:0;
  width:2px;
  background:linear-gradient(to bottom,var(--green-deep),var(--amber));
}
.timeline-item{
  position:relative;
  padding-bottom:40px;
}
.timeline-item:last-child{padding-bottom:0}
.timeline-item::before{
  content:'';
  position:absolute;
  left:-34px;top:6px;
  width:14px;height:14px;
  background:var(--amber);
  border:3px solid var(--white);
  border-radius:50%;
  box-shadow:0 0 0 2px var(--amber);
}
.timeline-item .year{
  font-family:'Noto Serif SC',serif;
  font-size:24px;
  font-weight:900;
  color:var(--green-deep);
  margin-bottom:8px;
}
.timeline-item h4{
  font-size:18px;
  color:var(--dark);
  margin-bottom:8px;
}
.timeline-item p{
  font-size:14px;
  color:var(--gray);
  line-height:1.8;
}

.cert-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.cert-item{
  text-align:center;
  padding:32px 20px;
  background:var(--white);
  border-radius:12px;
  border:1px solid var(--gray-light);
  transition:all .3s ease;
}
.cert-item:hover{
  border-color:var(--green-light);
  box-shadow:0 8px 24px rgba(27,94,63,.1);
  transform:translateY(-4px);
}
.cert-item .cert-icon{
  width:56px;height:56px;
  margin:0 auto 16px;
  background:var(--green-pale);
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
}
.cert-item .cert-icon svg{width:28px;height:28px;stroke:var(--green-deep)}
.cert-item h4{
  font-size:16px;
  color:var(--green-darker);
  margin-bottom:6px;
}
.cert-item p{
  font-size:13px;
  color:var(--gray);
}

/* ===== News ===== */
.news-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}
.news-card{
  background:var(--white);
  border-radius:12px;
  overflow:hidden;
  box-shadow:0 4px 16px rgba(0,0,0,.06);
  transition:all .3s ease;
  border:1px solid var(--gray-light);
}
.news-card:hover{
  transform:translateY(-6px);
  box-shadow:0 12px 32px rgba(0,0,0,.12);
}
.news-card-img{
  height:200px;
  overflow:hidden;
  background:linear-gradient(135deg,var(--green-pale),var(--warm-white));
  display:flex;
  align-items:center;
  justify-content:center;
}
.news-card-img .news-icon{
  width:64px;height:64px;
  opacity:.3;
}
.news-card-body{padding:24px}
.news-card-body .date{
  font-size:13px;
  color:var(--amber);
  font-weight:600;
  margin-bottom:10px;
  display:flex;
  align-items:center;
  gap:6px;
}
.news-card-body h3{
  font-size:18px;
  color:var(--green-darker);
  margin-bottom:12px;
  line-height:1.5;
}
.news-card-body p{
  font-size:14px;
  color:var(--gray);
  line-height:1.8;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-card-body .read-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-top:16px;
  color:var(--green-deep);
  font-weight:600;
  font-size:14px;
}

/* ===== Contact ===== */
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:50px;
}
.contact-info h2{
  font-size:30px;
  color:var(--green-darker);
  margin-bottom:24px;
}
.contact-info>p{
  font-size:16px;
  color:var(--gray);
  line-height:1.9;
  margin-bottom:36px;
}
.contact-item{
  display:flex;
  gap:20px;
  padding:24px;
  background:var(--white);
  border-radius:12px;
  margin-bottom:16px;
  border:1px solid var(--gray-light);
  transition:all .3s ease;
}
.contact-item:hover{
  border-color:var(--green-light);
  box-shadow:0 6px 20px rgba(27,94,63,.08);
}
.contact-item .ci-icon{
  width:52px;height:52px;
  background:linear-gradient(135deg,var(--green-deep),var(--green-light));
  border-radius:10px;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.contact-item .ci-icon svg{width:26px;height:26px;stroke:#fff}
.contact-item .ci-text h4{
  font-size:15px;
  color:var(--gray);
  margin-bottom:6px;
  font-weight:500;
}
.contact-item .ci-text p{
  font-size:17px;
  color:var(--green-darker);
  font-weight:600;
  line-height:1.5;
}

.wechat-section{
  margin-top:30px;
  padding:28px;
  background:var(--white);
  border-radius:12px;
  border:1px solid var(--gray-light);
  text-align:center;
}
.wechat-section h4{
  font-size:17px;
  color:var(--green-darker);
  margin-bottom:16px;
}
.wechat-qr{
  width:180px;height:180px;
  margin:0 auto 16px;
  border-radius:12px;
  overflow:hidden;
  border:4px solid var(--green-pale);
  padding:8px;
  background:#fff;
}
.wechat-qr img{width:100%;height:100%;object-fit:contain}
.wechat-section p{
  font-size:14px;
  color:var(--gray);
}

.contact-form-wrap{
  background:var(--white);
  border-radius:12px;
  padding:40px;
  box-shadow:0 8px 30px rgba(0,0,0,.08);
  border:1px solid var(--gray-light);
}
.contact-form-wrap h3{
  font-size:24px;
  color:var(--green-darker);
  margin-bottom:8px;
}
.contact-form-wrap .form-sub{
  font-size:14px;
  color:var(--gray);
  margin-bottom:28px;
}
.form-group{margin-bottom:20px}
.form-group label{
  display:block;
  font-size:14px;
  font-weight:600;
  color:var(--dark);
  margin-bottom:8px;
}
.form-group label .req{color:var(--amber)}
.form-group input,
.form-group select,
.form-group textarea{
  width:100%;
  padding:12px 16px;
  border:1px solid var(--gray-light);
  border-radius:8px;
  font-size:15px;
  font-family:inherit;
  color:var(--dark);
  background:var(--warm-white);
  transition:all .3s ease;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus{
  outline:none;
  border-color:var(--green-light);
  background:#fff;
  box-shadow:0 0 0 3px rgba(27,94,63,.1);
}
.form-group textarea{resize:vertical;min-height:120px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-submit{
  width:100%;
  padding:16px;
  background:linear-gradient(135deg,var(--green-deep),var(--green-light));
  color:#fff;
  font-size:16px;
  font-weight:700;
  border-radius:8px;
  transition:all .3s ease;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:10px;
}
.form-submit:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(27,94,63,.3)}

/* ===== Footer ===== */
.footer{
  background:var(--green-darker);
  color:rgba(255,255,255,.8);
  padding:70px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:50px;
}
.footer-brand .logo-text .cn{color:#fff;font-size:19px}
.footer-brand .logo-text .en{color:rgba(255,255,255,.5)}
.footer-brand>p{
  margin-top:20px;
  font-size:14px;
  line-height:1.9;
  color:rgba(255,255,255,.65);
  max-width:320px;
}
.footer-col h4{
  color:#fff;
  font-size:17px;
  margin-bottom:20px;
  position:relative;
  padding-bottom:12px;
}
.footer-col h4::after{
  content:'';
  position:absolute;
  bottom:0;left:0;
  width:30px;height:2px;
  background:var(--amber);
}
.footer-col ul li{
  margin-bottom:12px;
}
.footer-col ul li a{
  font-size:14px;
  color:rgba(255,255,255,.65);
  transition:color .3s ease,padding-left .3s ease;
  display:inline-block;
}
.footer-col ul li a:hover{
  color:var(--amber-light);
  padding-left:6px;
}
.footer-contact-item{
  display:flex;
  gap:10px;
  margin-bottom:14px;
  font-size:14px;
  color:rgba(255,255,255,.65);
  align-items:flex-start;
}
.footer-contact-item svg{
  width:18px;height:18px;
  stroke:var(--amber);
  flex-shrink:0;
  margin-top:3px;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:24px 0;
  text-align:center;
  font-size:13px;
  color:rgba(255,255,255,.45);
}
.footer-bottom a{color:rgba(255,255,255,.45)}
.footer-bottom a:hover{color:var(--amber-light)}

/* ===== Floating Contact ===== */
.floating-contact{
  position:fixed;
  right:20px;
  bottom:30px;
  z-index:999;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.fc-btn{
  width:52px;height:52px;
  background:var(--white);
  border-radius:12px;
  box-shadow:0 4px 16px rgba(0,0,0,.15);
  display:flex;
  align-items:center;
  justify-content:center;
  transition:all .3s ease;
  position:relative;
}
.fc-btn:hover{transform:scale(1.1);box-shadow:0 6px 24px rgba(0,0,0,.2)}
.fc-btn svg{width:24px;height:24px;stroke:var(--green-deep)}
.fc-btn.phone{background:linear-gradient(135deg,var(--green-deep),var(--green-light))}
.fc-btn.phone svg{stroke:#fff}
.fc-btn .tooltip{
  position:absolute;
  right:64px;
  top:50%;
  transform:translateY(-50%);
  background:var(--green-darker);
  color:#fff;
  padding:8px 16px;
  border-radius:6px;
  font-size:14px;
  white-space:nowrap;
  opacity:0;
  pointer-events:none;
  transition:opacity .3s ease;
}
.fc-btn:hover .tooltip{opacity:1}
.fc-btn .tooltip::after{
  content:'';
  position:absolute;
  right:-6px;top:50%;
  transform:translateY(-50%);
  border:6px solid transparent;
  border-left-color:var(--green-darker);
}
.fc-wechat-popup{
  position:absolute;
  right:64px;
  bottom:0;
  background:#fff;
  padding:16px;
  border-radius:12px;
  box-shadow:0 8px 30px rgba(0,0,0,.15);
  opacity:0;
  pointer-events:none;
  transition:opacity .3s ease;
  text-align:center;
  width:160px;
}
.fc-btn.wechat:hover .fc-wechat-popup{opacity:1;pointer-events:auto}
.fc-wechat-popup img{width:128px;height:128px;object-fit:contain;margin:0 auto 8px}
.fc-wechat-popup p{font-size:12px;color:var(--gray)}

/* ===== Back to Top ===== */
.back-top{
  position:fixed;
  right:20px;
  bottom:200px;
  width:48px;height:48px;
  background:var(--white);
  border-radius:50%;
  box-shadow:0 4px 16px rgba(0,0,0,.12);
  display:flex;
  align-items:center;
  justify-content:center;
  z-index:998;
  opacity:0;
  pointer-events:none;
  transition:all .3s ease;
}
.back-top.show{opacity:1;pointer-events:auto}
.back-top:hover{background:var(--green-deep)}
.back-top:hover svg{stroke:#fff}
.back-top svg{width:22px;height:22px;stroke:var(--green-deep);transition:stroke .3s ease}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .products-grid{grid-template-columns:repeat(2,1fr)}
  .advantages-grid{grid-template-columns:repeat(2,1fr)}
  .scenarios-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cert-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .product-detail,.about-hero,.contact-grid{grid-template-columns:1fr;gap:40px}
  .product-detail:nth-child(even){direction:ltr}
  .hero h1{font-size:42px}
}
@media(max-width:768px){
  .section{padding:60px 0}
  .section-title h2{font-size:28px}
  .nav{display:none}
  .nav.open{
    display:flex;
    flex-direction:column;
    position:absolute;
    top:76px;left:0;right:0;
    background:#fff;
    padding:20px;
    box-shadow:0 8px 24px rgba(0,0,0,.1);
    gap:4px;
  }
  .nav.open a{padding:12px 16px;width:100%}
  .mobile-menu-btn{display:flex}
  .header-phone{display:none}
  .hero{min-height:auto;padding:120px 0 80px}
  .hero h1{font-size:32px}
  .hero-sub{font-size:16px}
  .hero-stats{gap:28px}
  .hero-stat .num{font-size:32px}
  .products-grid{grid-template-columns:1fr}
  .advantages-grid{grid-template-columns:1fr}
  .scenarios-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .cert-grid{grid-template-columns:1fr 1fr}
  .news-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .page-header{padding:120px 0 50px}
  .page-header h1{font-size:30px}
  .product-detail-img,.about-hero-img{height:300px}
  .feature-list{grid-template-columns:1fr}
  .cta-band-inner{flex-direction:column;text-align:center}
  .cta-band-phone .phone-num{font-size:28px}
  .contact-form-wrap{padding:28px 20px}
}