:root{
  --c-deep:#0a3d4a;
  --c-teal:#0e7c86;
  --c-aqua:#1fb6c9;
  --c-aqua-light:#d7f1f4;
  --c-orange:#ff7a3c;
  --c-bg:#f5f9fa;
  --c-alt:#eef5f6;
  --c-ink:#16323a;
  --c-muted:#5b7780;
  --c-line:#d8e6e9;
  --c-white:#ffffff;
  --shadow:0 8px 28px rgba(10,61,74,.10);
  --radius:14px;
  --maxw:1140px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,"Noto Sans CJK SC",sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--c-ink);background:var(--c-bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
img{max-width:100%}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--c-line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px}
.brand-logo{height:44px;width:auto;object-fit:contain;transition:opacity .2s}
.brand-logo:hover{opacity:.85}
.main-nav{display:flex;gap:22px}
.main-nav a{font-size:14.5px;color:var(--c-ink);position:relative;padding:4px 0;transition:color .2s}
.main-nav a:hover{color:var(--c-teal)}
.main-nav a::after{content:"";position:absolute;left:0;bottom:-2px;height:2px;width:0;background:var(--c-aqua);transition:width .25s}
.main-nav a:hover::after{width:100%}
.header-actions{display:flex;align-items:center;gap:12px}
.lang-toggle{border:1px solid var(--c-line);background:var(--c-white);border-radius:20px;padding:6px 12px;cursor:pointer;font-size:13px;color:var(--c-teal);font-weight:600;transition:.2s}
.lang-toggle:hover{border-color:var(--c-aqua);background:var(--c-aqua-light)}
.lang-sep{opacity:.4;margin:0 3px}
.lang-en{opacity:.5}
html[lang="en"] .lang-en{opacity:1;color:var(--c-teal)}
html[lang="en"] .lang-zh{opacity:.5}
html[lang="zh"] .lang-zh{opacity:1;color:var(--c-teal)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.nav-toggle span{width:24px;height:2px;background:var(--c-deep);transition:.3s}

/* Hero */
.hero{position:relative;color:#fff;background:linear-gradient(135deg,var(--c-deep) 0%,var(--c-teal) 60%,var(--c-aqua) 120%);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(31,182,201,.35),transparent 45%);pointer-events:none}
.hero-inner{position:relative;padding:84px 20px 72px;max-width:880px}
.hero-eyebrow{font-size:14px;letter-spacing:2px;color:var(--c-aqua-light);text-transform:uppercase;margin-bottom:14px}
.hero-title{font-size:clamp(30px,5vw,52px);line-height:1.15;font-weight:800;margin-bottom:18px}
.hero-sub{font-size:16.5px;color:#eafafc;max-width:680px;margin-bottom:28px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:38px}
.hero-stats{list-style:none;display:flex;gap:14px;flex-wrap:wrap}
.hero-stats li{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);border-radius:12px;padding:12px 18px;min-width:140px}
.hero-stats strong{display:block;font-size:12px;color:var(--c-aqua-light);font-weight:600;letter-spacing:1px}
.hero-stats span{font-size:15px;font-weight:700}

.btn{display:inline-block;border-radius:30px;padding:12px 26px;font-size:15px;font-weight:700;cursor:pointer;border:2px solid transparent;transition:.22s}
.btn-primary{background:var(--c-orange);color:#fff;border-color:var(--c-orange)}
.btn-primary:hover{background:#ff6730;transform:translateY(-2px);box-shadow:0 10px 22px rgba(255,122,60,.35)}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.6)}
.btn-ghost:hover{background:#fff;color:var(--c-deep)}

/* Sections */
.section{padding:72px 0}
.section-alt{background:var(--c-alt)}
.section-head{text-align:center;margin-bottom:42px}
.kicker{display:inline-block;font-size:13px;letter-spacing:2px;color:var(--c-aqua);font-weight:700;text-transform:uppercase;margin-bottom:10px}
.section-head h2{font-size:clamp(24px,3.5vw,34px);color:var(--c-deep);font-weight:800}

/* About */
.about-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:36px;align-items:start}
.about-text p{margin-bottom:16px;color:var(--c-ink)}
.about-text .check-list{list-style:none;margin-top:18px;display:grid;gap:10px}
.check-list li{position:relative;padding-left:26px;color:var(--c-ink)}
.check-list li::before{content:"✓";position:absolute;left:0;top:0;color:var(--c-teal);font-weight:800}
.about-card{background:var(--c-white);border:1px solid var(--c-line);border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow)}
.about-card h3{color:var(--c-deep);margin-bottom:14px;font-size:18px}
.about-card dl div{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px dashed var(--c-line);font-size:14.5px}
.about-card dl div:last-child{border-bottom:none}
.about-card dt{color:var(--c-muted)}
.about-card dd{font-weight:600;text-align:right}

/* Business cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--c-white);border:1px solid var(--c-line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow);transition:.25s}
.card:hover{transform:translateY(-5px);border-color:var(--c-aqua)}
.card-icon{font-size:32px;margin-bottom:12px}
.card h3{color:var(--c-deep);font-size:18px;margin-bottom:8px}
.card p{color:var(--c-muted);font-size:14.5px}

/* Culture */
.culture-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.value{background:var(--c-white);border:1px solid var(--c-line);border-radius:var(--radius);padding:24px 22px;box-shadow:var(--shadow)}
.value-no{font-size:30px;font-weight:800;color:var(--c-aqua-light);display:block;margin-bottom:6px}
.value h3{color:var(--c-deep);font-size:18px;margin-bottom:8px}
.value p{color:var(--c-muted);font-size:14px}
.culture-quote{margin-top:36px;background:linear-gradient(135deg,var(--c-deep),var(--c-teal));color:#fff;border-radius:var(--radius);padding:28px 32px;font-size:18px;text-align:center;font-weight:600;box-shadow:var(--shadow)}

/* Market */
.market-note{background:var(--c-aqua-light);border-left:4px solid var(--c-aqua);border-radius:8px;padding:14px 18px;font-size:14.5px;color:var(--c-deep);margin-bottom:26px}
.market-highlights{background:var(--c-white);border:1px solid var(--c-line);border-radius:var(--radius);padding:22px 26px;margin-bottom:28px;box-shadow:var(--shadow)}
.market-highlights h3{color:var(--c-deep);margin-bottom:12px;font-size:17px}
.market-highlights ul{list-style:none;display:grid;gap:10px}
.market-highlights li{position:relative;padding-left:24px;font-size:15px}
.market-highlights li::before{content:"▸";position:absolute;left:0;color:var(--c-aqua);font-weight:800}
.market-tables{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.table-wrap{background:var(--c-white);border:1px solid var(--c-line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.table-wrap h3{color:var(--c-deep);font-size:15.5px;margin-bottom:14px}
.table-scroll{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--c-line);white-space:nowrap}
th{background:var(--c-alt);color:var(--c-deep);font-weight:700}
tbody tr:hover{background:var(--c-aqua-light)}
td:first-child,th:first-child{font-weight:600;color:var(--c-deep)}
.market-updated{margin-top:20px;font-size:13.5px;color:var(--c-muted);text-align:right}
.market-disclaimer{margin-top:10px;font-size:12.5px;color:var(--c-muted);text-align:center;font-style:italic}

/* Interactive */
.interactive-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.panel{background:var(--c-white);border:1px solid var(--c-line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.panel h3{color:var(--c-deep);font-size:19px;margin-bottom:8px}
.panel-hint{color:var(--c-muted);font-size:13.5px;margin-bottom:16px}
.calc-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.calc-row label{font-size:14px;color:var(--c-ink);flex:1}
.calc-row input{flex:1;max-width:160px;padding:9px 12px;border:1px solid var(--c-line);border-radius:8px;font-size:14px;font-family:var(--font)}
.calc-row input:focus{outline:none;border-color:var(--c-aqua);box-shadow:0 0 0 3px var(--c-aqua-light)}
.calc-sep{border:none;border-top:1px dashed var(--c-line);margin:18px 0}
.calc-result{margin-top:14px;background:var(--c-deep);color:#fff;border-radius:8px;padding:12px 16px;font-weight:700;font-size:15px;text-align:center}

.inquiry-form{display:grid;gap:14px}
.form-row{display:grid;gap:6px}
.form-row label{font-size:13.5px;color:var(--c-muted);font-weight:600}
.form-row input,.form-row select,.form-row textarea{padding:10px 12px;border:1px solid var(--c-line);border-radius:8px;font-size:14px;font-family:var(--font);width:100%}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{outline:none;border-color:var(--c-aqua);box-shadow:0 0 0 3px var(--c-aqua-light)}
.inquiry-form .btn{justify-self:start;margin-top:4px}

.subscribe{margin-top:30px;background:linear-gradient(135deg,var(--c-deep),var(--c-teal));border-radius:var(--radius);padding:30px;text-align:center;color:#fff;box-shadow:var(--shadow)}
.subscribe h3{font-size:20px;margin-bottom:8px}
.subscribe p{color:var(--c-aqua-light);font-size:14.5px;margin-bottom:18px}
.subscribe-form{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.subscribe-form input{padding:12px 16px;border-radius:30px;border:none;min-width:260px;font-size:14px;font-family:var(--font)}
.subscribe-form .btn-ghost{background:var(--c-orange);border-color:var(--c-orange);color:#fff}
.subscribe-form .btn-ghost:hover{background:#fff;color:var(--c-deep)}

/* Contact */
.contact-grid{display:grid;grid-template-columns:auto auto 1fr;gap:36px;align-items:center}
.contact-info p{display:flex;align-items:center;gap:12px;font-size:16px;margin-bottom:14px}
.contact-info a:hover{color:var(--c-teal)}
.contact-qr{text-align:center}
.wechat-qr-img{width:160px;height:160px;object-fit:contain;border-radius:12px;border:2px solid var(--c-line);padding:6px;background:#fff}
.qr-caption{margin-top:8px;font-size:13px;color:var(--c-muted)}
.contact-cta p{color:var(--c-muted);margin-bottom:18px;font-size:15.5px}

/* Products placeholder */
.product-gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.product-card{border-radius:var(--radius);overflow:hidden;position:relative;box-shadow:0 2px 10px rgba(0,60,80,.08);transition:transform .3s ease,box-shadow .3s ease;background:#fff}
.product-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,60,80,.16)}
.product-card img{width:100%;height:260px;object-fit:cover;display:block}
.product-label{position:absolute;bottom:0;left:0;right:0;padding:14px 12px 12px;background:linear-gradient(transparent,rgba(0,30,40,.82));color:#fff}
.product-label strong{display:block;font-size:15px;font-weight:700}
.product-label em{display:block;font-style:normal;font-size:11.5px;color:#b8dce6;margin-top:2px}

/* Footer */
.site-footer{background:var(--c-deep);color:#cfe8ec;padding:42px 0 0}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.footer-brand strong{color:#fff;font-size:17px}
.footer-brand p{font-size:13.5px;margin-top:6px;color:#9fc6cd}
.footer-nav{display:flex;gap:20px;flex-wrap:wrap}
.footer-nav a{font-size:14px;color:#cfe8ec}
.footer-nav a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding:16px 20px;text-align:center;font-size:12.5px;color:#8fb6bd}

/* To top */
.to-top{position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:50%;background:var(--c-teal);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.3s;z-index:90}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{background:var(--c-deep)}

/* Responsive */
@media(max-width:900px){
  .about-grid{grid-template-columns:1fr}
  .cards{grid-template-columns:repeat(2,1fr)}
  .culture-grid{grid-template-columns:repeat(2,1fr)}
  .market-tables{grid-template-columns:1fr}
  .interactive-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr 1fr}
  .product-gallery{grid-template-columns:repeat(2,1fr)}
  .product-card img{height:220px}
}
@media(max-width:640px){
  .main-nav{position:fixed;top:64px;left:0;right:0;background:var(--c-white);flex-direction:column;gap:0;padding:0 20px;max-height:0;overflow:hidden;border-bottom:1px solid var(--c-line);transition:max-height .3s}
  .main-nav.open{max-height:360px}
  .main-nav a{padding:14px 0;border-bottom:1px solid var(--c-line);width:100%}
  .nav-toggle{display:flex}
  .cards{grid-template-columns:1fr}
  .culture-grid{grid-template-columns:1fr}
  .product-gallery{grid-template-columns:1fr 1fr}
  .product-card img{height:200px}
  .contact-grid{grid-template-columns:1fr;text-align:center}
  .contact-info p{justify-content:center}
  .hero-inner{padding:60px 20px 52px}
  .section{padding:54px 0}
}