:root{--navy:#0a2744;--blue:#1055a0;--mid:#1e7abf;--light:#4faadc;--pale:#d6eaf8;--accent:#e8a020;--white:#fff;--offwhite:#f7f9fc;--gray:#6b7c93;--darkgray:#2c3e50;--border:#dce6f0}
    *{margin:0;padding:0;box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{font-family:'DM Sans','Noto Sans SC',sans-serif;color:var(--darkgray);background:var(--white);overflow-x:hidden}

    /* TOP BAR */
    .top-bar{background:#1055a0;padding:7px 5%;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:6px}
    .top-bar .loc{color:rgba(255,255,255,0.75);font-size:12px;letter-spacing:0.3px}
    .top-bar .links{display:flex;align-items:center;gap:18px}
    .top-bar .links a{color:#fff;text-decoration:none;font-size:13px;padding:8px 6px;display:inline-flex;align-items:center;min-height:36px}
    .top-bar .phone-link{display:flex;align-items:center;gap:6px;font-size:14px!important;font-weight:500;letter-spacing:0.5px}

    /* NAV */
    nav{position:sticky;top:0;z-index:100;background:var(--navy);display:flex;align-items:center;justify-content:space-between;padding:0 5%;height:68px;border-bottom:2px solid var(--accent)}
    .logo-wrap{display:flex;flex-direction:column;gap:1px}
    .logo-cn{font-family:'Noto Serif SC',serif;color:var(--white);font-size:16px;font-weight:600;letter-spacing:1px}
    .logo-en{color:var(--light);font-size:12px;font-weight:300;letter-spacing:2px;text-transform:uppercase}
    .nav-links{display:flex;gap:32px}
    .nav-links a{color:rgba(255,255,255,0.75);font-size:15px;text-decoration:none;letter-spacing:0.3px;transition:color 0.2s}
    .nav-links a:hover{color:var(--accent)}
    .nav-cta{background:var(--accent);color:var(--navy);border:none;padding:9px 22px;border-radius:4px;font-size:15px;font-weight:500;cursor:pointer;font-family:inherit;letter-spacing:0.3px;text-decoration:none}
    .nav-cta:hover{background:#f5b530}
    .nav-mobile-toggle{display:none;align-items:center;justify-content:center;width:42px;height:42px;border:1px solid rgba(255,255,255,0.18);background:rgba(255,255,255,0.04);color:var(--white);border-radius:8px;cursor:pointer}
    .nav-mobile-toggle svg{width:20px;height:20px;fill:currentColor}
    .mobile-menu{display:none;position:fixed;top:68px;left:0;right:0;z-index:99;padding:14px 5% 18px;background:rgba(6,15,30,0.98);border-bottom:1px solid rgba(255,255,255,0.08);box-shadow:0 14px 30px rgba(0,0,0,0.18)}
    .mobile-menu.open{display:block}
    .mobile-menu-links{display:grid;gap:10px}
    .mobile-menu-links a{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border:1px solid rgba(255,255,255,0.08);border-radius:10px;background:rgba(255,255,255,0.03);color:rgba(255,255,255,0.88);text-decoration:none;font-size:14px}
    .mobile-menu-links a span{color:rgba(255,255,255,0.45);font-size:12px}
    .mobile-menu-cta{display:block;margin-top:12px;padding:13px 16px;border-radius:10px;background:var(--accent);color:var(--navy);text-align:center;text-decoration:none;font-size:14px;font-weight:600}

    /* HERO */
    .hero{background:var(--navy);padding:88px 5% 72px;position:relative;overflow:hidden}
    .hero::before{content:'';position:absolute;top:-60px;right:-80px;width:480px;height:480px;background:radial-gradient(circle,rgba(30,122,191,0.18) 0%,transparent 70%);pointer-events:none}
    .hero::after{content:'';position:absolute;bottom:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--mid),var(--accent))}
    .hero-layout{max-width:860px;margin:0}
    .hero-copy{position:relative;z-index:1}
    .hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,0.06);border:1px solid rgba(79,170,220,0.3);color:var(--light);font-size:12px;padding:5px 16px;border-radius:2px;margin-bottom:24px;letter-spacing:1px;text-transform:uppercase}
    .hero-badge::before{content:'\25B6';font-size:8px;color:var(--accent)}
    .hero h1{font-family:'Noto Serif SC',serif;color:var(--white);font-size:48px;font-weight:600;line-height:1.25;margin-bottom:12px;letter-spacing:0.5px}
    .hero h1 em{font-style:normal;color:var(--accent);font-family:'Noto Serif SC',serif}
    .hero-en{color:rgba(255,255,255,0.4);font-size:15px;font-weight:300;letter-spacing:2px;text-transform:uppercase;margin-bottom:20px}
    .hero-desc{color:rgba(255,255,255,0.65);font-size:16px;line-height:1.8;margin-bottom:36px;max-width:540px}
    .hero-btns{display:flex;gap:14px;flex-wrap:wrap}
    .btn-gold{background:var(--accent);color:var(--navy);border:none;padding:13px 30px;border-radius:4px;font-size:14px;font-weight:500;cursor:pointer;font-family:inherit;letter-spacing:0.3px;text-decoration:none;display:inline-block}
    .btn-gold:hover{background:#f5b530}
    .btn-ghost{background:transparent;color:rgba(255,255,255,0.85);border:1px solid rgba(255,255,255,0.25);padding:13px 30px;border-radius:4px;font-size:14px;cursor:pointer;font-family:inherit;text-decoration:none;display:inline-block}
    .btn-ghost:hover{border-color:var(--light);color:var(--light)}


    /* STATS */
    .stats{background:var(--blue);display:flex;justify-content:center;flex-wrap:wrap}
    .stat-item{text-align:center;padding:24px 48px;border-right:1px solid rgba(255,255,255,0.12)}
    .stat-item:last-child{border-right:none}
    .stat-num{font-size:32px;font-weight:500;color:var(--accent);font-family:'DM Sans',sans-serif}
    .stat-cn{font-size:12px;color:rgba(255,255,255,0.75);margin-top:3px}
    .stat-en{font-size:12px;color:rgba(255,255,255,0.45);letter-spacing:0.5px;margin-top:2px}

    /* SECTIONS */
    section{padding:72px 5%}
    section.alt{background:var(--offwhite)}
    .sec-head{text-align:center;margin-bottom:52px}
    .sec-head .label{display:inline-block;color:var(--mid);font-size:11px;font-weight:500;letter-spacing:3px;text-transform:uppercase;margin-bottom:10px}
    .sec-head h2{font-family:'Noto Serif SC',serif;font-size:28px;font-weight:600;color:var(--navy);margin-bottom:8px}
    .sec-head p{color:var(--gray);font-size:14px;line-height:1.7}

    /* PRODUCTS */
    .prod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;max-width:1100px;margin:0 auto}
    .prod-card{background:var(--white);border:1px solid var(--border);border-top:3px solid var(--blue);overflow:hidden;transition:border-top-color 0.2s,transform 0.2s}
    .prod-card:hover{border-top-color:var(--accent);transform:translateY(-3px)}
    .prod-carousel{position:relative;width:100%;height:190px;overflow:hidden;cursor:pointer;background:var(--pale)}
    .prod-carousel img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity 0.7s ease}
    .prod-carousel img.pc-active{opacity:1}
    .pc-dots{position:absolute;bottom:8px;left:50%;transform:translateX(-50%);display:flex;gap:4px;z-index:2;pointer-events:none}
    .pc-dot{width:5px;height:5px;border-radius:50%;background:rgba(255,255,255,0.4);transition:background 0.2s}
    .pc-dot.active{background:#fff}
    .pc-hint{position:absolute;bottom:0;left:0;right:0;text-align:center;font-size:11px;color:rgba(255,255,255,0.9);padding:22px 8px 8px;background:linear-gradient(transparent,rgba(0,0,0,0.5));opacity:0;transition:opacity 0.25s;pointer-events:none}
    .prod-carousel:hover .pc-hint{opacity:1}
    .prod-info{padding:16px 18px 18px}
    .prod-formula{font-family:'DM Sans',monospace;font-size:11px;color:var(--mid);letter-spacing:1px;margin-bottom:10px;background:var(--pale);display:inline-block;padding:2px 8px;border-radius:2px}
    .prod-card h3{font-family:'Noto Serif SC',serif;font-size:16px;color:var(--navy);margin-bottom:3px}
    .prod-card .en{font-size:12px;color:var(--gray);margin-bottom:10px}
    .prod-card p{font-size:13px;color:var(--darkgray);line-height:1.65}
    .prod-uses{margin-top:12px;display:flex;flex-wrap:wrap;gap:5px}
    .use-tag{background:var(--pale);color:var(--blue);font-size:11px;padding:2px 8px;border-radius:2px}
    .app-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;max-width:1100px;margin:0 auto}
    .app-card{background:var(--white);border:1px solid var(--border);border-top:3px solid var(--accent);border-radius:10px;padding:20px 18px;box-shadow:0 6px 18px rgba(10,39,68,0.04)}
    .app-card h3{font-family:'Noto Serif SC',serif;font-size:16px;color:var(--navy);margin-bottom:8px}
    .app-card p{font-size:13px;color:var(--gray);line-height:1.7;margin-bottom:12px}
    .app-meta{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
    .app-meta span{font-size:11px;background:var(--pale);color:var(--blue);padding:2px 8px;border-radius:2px}
    .app-card a{color:var(--blue);text-decoration:none;font-size:14px;font-weight:500;display:inline-block;padding:8px 0;min-height:32px;line-height:1.6}
    /* LIGHTBOX */
    .lb-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.92);z-index:9999;align-items:center;justify-content:center}
    .lb-overlay.open{display:flex}
    .lb-body{position:relative;display:flex;flex-direction:column;align-items:center;max-width:92vw}
    .lb-img{max-width:88vw;max-height:80vh;object-fit:contain;display:block}
    .lb-count{color:rgba(255,255,255,0.5);font-size:12px;margin-top:10px;letter-spacing:1px}
    .lb-close{position:absolute;top:-40px;right:-4px;color:rgba(255,255,255,0.7);font-size:34px;cursor:pointer;line-height:1;width:40px;text-align:center;user-select:none}
    .lb-close:hover{color:#fff}
    .lb-arr{position:fixed;top:50%;transform:translateY(-50%);color:rgba(255,255,255,0.65);font-size:46px;cursor:pointer;padding:20px 14px;user-select:none;line-height:1;z-index:2}
    .lb-arr:hover{color:#fff}
    .lb-prev{left:4px}
    .lb-next{right:4px}

    /* ADVANTAGES */
    .adv-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1px;background:var(--border);max-width:1000px;margin:0 auto;border:1px solid var(--border)}
    .adv-item{background:var(--white);padding:32px 28px}
    .adv-num{font-size:40px;font-weight:300;color:var(--pale);font-family:'DM Sans',sans-serif;line-height:1;margin-bottom:12px}
    .adv-item h3{font-size:15px;font-weight:500;color:var(--navy);margin-bottom:8px}
    .adv-item .en-small{font-size:11px;color:var(--mid);letter-spacing:0.5px;margin-bottom:10px;display:block}
    .adv-item p{font-size:13px;color:var(--gray);line-height:1.7}

    /* PRICING */
    .price-section{max-width:1000px;margin:0 auto}
    .price-note{color:#c0392b;font-size:13px;margin-bottom:24px;text-align:center}
    .price-table{width:100%;border-collapse:collapse;font-size:13px}
    .price-table th{background:var(--navy);color:var(--white);padding:12px 16px;text-align:left;font-weight:500;font-size:12px;letter-spacing:0.5px}
    .price-table td{padding:12px 16px;border-bottom:1px solid var(--border)}
    .price-table tr:hover td{background:var(--offwhite)}
    .price-table td:nth-child(3){color:var(--blue);font-weight:500}
    .price-tips{margin-top:24px;background:var(--offwhite);border:1px solid var(--border);border-left:3px solid var(--accent);padding:20px 24px}
    .price-tips h4{font-size:14px;color:var(--navy);margin-bottom:10px}
    .price-tips li{font-size:13px;color:var(--gray);line-height:1.8;margin-left:16px}

    /* EXPORT */
    .export-sec{background:var(--navy);padding:72px 5%;text-align:center;color:var(--white);position:relative;overflow:hidden}
    .export-sec::before{content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:600px;height:600px;background:radial-gradient(circle,rgba(30,122,191,0.12) 0%,transparent 60%);pointer-events:none}
    .export-sec h2{font-family:'Noto Serif SC',serif;font-size:28px;font-weight:600;margin-bottom:6px}
    .export-sec .sub{color:rgba(255,255,255,0.5);font-size:13px;margin-bottom:36px;letter-spacing:1px}
    .countries{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:40px;max-width:700px;margin-left:auto;margin-right:auto}
    .country{border:1px solid rgba(79,170,220,0.3);color:rgba(255,255,255,0.8);font-size:12px;padding:6px 16px;border-radius:2px;letter-spacing:0.5px}
    .cert-row{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:36px}
    .cert-badge{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.15);color:var(--light);font-size:12px;padding:8px 20px;font-weight:500;letter-spacing:1px}

    /* FAQ */
    .faq-item{background:var(--white);border:1px solid var(--border);border-left:3px solid var(--blue);padding:20px 24px;margin-bottom:14px}
    .faq-item h3{font-size:15px;font-weight:500;color:var(--navy);margin-bottom:8px}
    .faq-item p{font-size:13px;color:var(--gray);line-height:1.7}

    /* CONTACT */
    .contact-wrap{max-width:960px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
    .contact-info h3{font-family:'Noto Serif SC',serif;font-size:22px;color:var(--navy);margin-bottom:24px}
    .info-row{border-bottom:1px solid var(--border);padding:14px 0}
    .info-label{font-size:11px;color:var(--gray);letter-spacing:1px;text-transform:uppercase;margin-bottom:4px}
    .info-val{font-size:14px;color:var(--navy);font-weight:500}
    .info-val a{color:var(--blue);text-decoration:none}
    .inquiry-form{background:var(--offwhite);border:1px solid var(--border);border-top:3px solid var(--accent);padding:32px 28px}
    .inquiry-form h3{font-size:16px;font-weight:500;color:var(--navy);margin-bottom:20px}
    .field{margin-bottom:14px}
    .field label{display:block;font-size:12px;color:var(--gray);margin-bottom:5px;letter-spacing:0.3px}
    .field input,.field select,.field textarea{width:100%;padding:9px 12px;border:1px solid var(--border);background:var(--white);font-family:inherit;font-size:13px;color:var(--darkgray);outline:none;border-radius:2px;transition:border-color 0.2s}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:var(--mid)}
    .field textarea{height:90px;resize:none}
    .field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .submit-btn{width:100%;background:var(--blue);color:var(--white);border:none;padding:12px;font-size:14px;font-family:inherit;cursor:pointer;letter-spacing:0.5px;margin-top:4px;transition:background 0.2s}
    .submit-btn:hover{background:var(--navy)}

    /* FOOTER */
    footer{background:#060f1e;padding:40px 5% 24px;color:rgba(255,255,255,0.5)}
    .footer-top{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:28px;padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,0.07);margin-bottom:20px}
    .footer-brand .f-logo-cn{font-size:17px;margin-bottom:4px;color:var(--white);font-family:'Noto Serif SC',serif}
    .footer-brand .f-logo-en{font-size:12px;margin-bottom:12px;display:block;color:var(--light)}
    .footer-brand p{font-size:12px;color:rgba(255,255,255,0.3);line-height:1.7;max-width:280px}
    .footer-links h4{font-size:12px;color:rgba(255,255,255,0.6);letter-spacing:1px;text-transform:uppercase;margin-bottom:12px}
    .footer-links a{display:block;font-size:12px;color:rgba(255,255,255,0.35);text-decoration:none;margin-bottom:7px}
    .footer-links a:hover{color:var(--light)}
    .footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;font-size:11px}

    /* PHOTO GALLERY */
    .gallery-section{margin:32px auto 0;max-width:1100px;padding:0 4px}
    .gallery-label{font-size:11px;color:#7a9ab5;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;text-align:center;margin-bottom:14px}
    .gallery-outer{display:flex;align-items:center;gap:6px}
    .gallery-btn{background:#0a2744;color:#fff;border:none;border-radius:50%;width:34px;height:34px;font-size:22px;cursor:pointer;flex-shrink:0;display:flex;align-items:center;justify-content:center;transition:background 0.2s;padding:0;line-height:1}
    .gallery-btn:hover{background:#1e7abf}
    .gallery-track-wrap{flex:1;overflow:hidden;border-radius:8px}
    .gallery-track{display:flex;gap:6px;transition:transform 0.45s ease;will-change:transform}
    .gallery-item{flex-shrink:0;border-radius:6px;overflow:hidden;background:#e4edf5}
    .gallery-item img{width:100%;height:110px;object-fit:cover;display:block;transition:transform 0.3s}
    .gallery-item:hover img{transform:scale(1.05)}
    .gallery-dots{display:flex;justify-content:center;gap:5px;margin-top:10px;flex-wrap:wrap}
    .gallery-dot{width:6px;height:6px;border-radius:50%;background:#c8d8e8;cursor:pointer;transition:background 0.2s;flex-shrink:0}
    .gallery-dot.active{background:#0a2744}
    @media(max-width:768px){.gallery-item img{height:75px}.gallery-btn{width:28px;height:28px;font-size:17px}}

    /* CHAT WIDGET */
    .chat-widget{position:fixed;bottom:0;right:20px;z-index:9999;font-family:'Noto Sans SC','DM Sans',sans-serif;width:300px}
    .chat-box{display:none;background:#fff;border:1px solid #d0dde8;border-radius:10px 10px 0 0;box-shadow:0 -4px 24px rgba(10,39,68,0.15);overflow:hidden}
    .chat-header{background:#0a2744;padding:12px 16px;display:flex;align-items:center;justify-content:space-between;cursor:pointer}
    .chat-header-left{display:flex;align-items:center;gap:10px}
    .chat-avatar{width:32px;height:32px;border-radius:50%;background:#1e7abf;display:flex;align-items:center;justify-content:center;font-size:15px;flex-shrink:0}
    .chat-online{color:#4faadc;font-size:11px;margin-top:2px}
    .chat-msgs{max-height:110px;overflow-y:auto;padding:8px 12px 4px;background:#fff;display:none}
    .chat-msg-bubble{background:#dceeff;border-radius:14px 14px 2px 14px;padding:7px 11px;font-size:12px;color:#0a2744;margin-bottom:6px;max-width:88%;margin-left:auto;word-break:break-all;line-height:1.5}
    .chat-reply-hint{font-size:11px;color:#2ecc71;text-align:center;padding:6px 12px 8px;display:none;background:#fff;line-height:1.5}
    .chat-reply-hint.chat-reply-error{color:#b45309;background:#fff7ed}
    .chat-wechat-bar{display:flex;align-items:center;justify-content:center;padding:8px 12px;border-top:1px solid #d0dde8;background:#f0fdf4;color:#186a3b;font-size:12px;font-weight:500;gap:6px;cursor:pointer;transition:background 0.2s}
    .chat-wechat-bar:hover{background:#dcfce7}
    .chat-input-area{display:flex;align-items:center;gap:8px;padding:10px 12px;background:#fff}
    .chat-input-area input{flex:1;border:1px solid #d0dde8;border-radius:20px;padding:7px 14px;font-size:13px;outline:none;color:#2c3e50;background:#f9fbfd}
    .chat-input-area input:focus{border-color:#1e7abf}
    .chat-send-btn{background:#0a2744;color:#fff;border:none;border-radius:20px;padding:7px 14px;font-size:13px;cursor:pointer;transition:background 0.2s}
    .chat-send-btn:hover{background:#1e7abf}
    .chat-phone-bar{display:flex;align-items:center;justify-content:center;background:#e8f2fb;padding:9px 12px;border-top:1px solid #d0dde8;text-decoration:none;color:#0a2744;font-size:13px;font-weight:500;gap:6px;transition:background 0.2s}
    .chat-phone-bar:hover{background:#d0e6f5}
    .chat-tab{background:#0a2744;color:#fff;padding:10px 18px;border-radius:10px 10px 0 0;cursor:pointer;font-size:14px;font-weight:500;display:flex;align-items:center;gap:8px;box-shadow:0 -2px 12px rgba(10,39,68,0.18);transition:background 0.2s;user-select:none}
    .chat-tab:hover{background:#1e7abf}
    .chat-tab-dot{width:8px;height:8px;background:#2ecc71;border-radius:50%;animation:blink 1.5s infinite;flex-shrink:0}
    @keyframes blink{0%,100%{opacity:1}50%{opacity:0.3}}

    @media(max-width:1100px){
      .nav-links{display:none}
      .nav-cta{display:none}
      .nav-mobile-toggle{display:flex}
      .hero-layout{grid-template-columns:1fr}
    }

    @media(max-width:768px){
      nav{height:64px;padding:0 4%}
      .logo-cn{font-size:14px}
      .logo-en{font-size:11px;letter-spacing:1.2px}
      .hero h1{font-size:32px}
      .hero{padding:72px 5% 60px}
      .hero-layout{grid-template-columns:1fr}
      .hero-btns a{width:100%;text-align:center}
      .stat-item{padding:20px 28px}
      .contact-wrap{grid-template-columns:1fr}
      .field-row{grid-template-columns:1fr}
      .footer-top{flex-direction:column}
      .price-table{font-size:12px}
      .price-table th,.price-table td{padding:8px 10px}
      .top-bar .loc{display:none}
      .chat-widget{right:12px;width:calc(100vw - 24px);max-width:320px}
      .chat-msgs{max-height:28vh}
    }