*{box-sizing:border-box;margin:0;padding:0;}
:root{
  --primary:#193454;
  --primary-2:#24466e;
  --accent:#2c6099;
  --accent-2:#4f86bd;
  --light:#f4f7fa;
  --gray:#5a6675;
  --text:#22283a;
  --white:#ffffff;
  --border:#dde5ee;
  --radius:10px;
  --shadow:0 2px 12px rgba(15,35,60,.07);
}
html{scroll-behavior:smooth;}
body{
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--text);background:#fff;line-height:1.75;font-size:1rem;
}
img{max-width:100%;display:block;}
a{color:var(--accent);}
.container{max-width:1200px;margin:0 auto;padding:0 1.25rem;}

/* ===== Header & Nav ===== */
header{background:var(--primary);color:#fff;position:sticky;top:0;z-index:100;box-shadow:0 2px 12px rgba(0,0,0,.18);}
.header-wrap{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:.85rem 1.25rem;}
.logo{display:flex;align-items:center;gap:.65rem;color:#fff;text-decoration:none;font-weight:800;font-size:1.28rem;letter-spacing:.03em;line-height:1.2;}
.logo-mark{width:42px;height:42px;border-radius:8px;background:linear-gradient(135deg,var(--accent-2),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:900;overflow:hidden;flex:none;}
.logo-mark img{width:100%;height:100%;object-fit:contain;border-radius:8px;}
.logo-text{white-space:nowrap;}
.lang-switch{display:flex;gap:.45rem;flex:none;}
.lang-switch button{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.35);color:#fff;padding:.35rem .8rem;border-radius:6px;cursor:pointer;font-size:.88rem;line-height:1.4;}
.lang-switch button.active{background:var(--accent);border-color:var(--accent);font-weight:700;}
.nav-desktop{display:flex;gap:1.15rem;}
.nav-desktop a{color:#e8eef6;text-decoration:none;font-size:.94rem;padding:.25rem 0;border-bottom:2px solid transparent;transition:border-color .2s,color .2s;white-space:nowrap;}
.nav-desktop a:hover{border-bottom-color:var(--accent-2);color:#fff;}
.nav-desktop a.active{border-bottom-color:#fff;color:#fff;font-weight:700;}
.menu-toggle{display:none;background:none;border:1px solid rgba(255,255,255,.45);color:#fff;border-radius:6px;width:42px;height:42px;cursor:pointer;align-items:center;justify-content:center;flex:none;}
.menu-toggle svg{width:22px;height:22px;}
.nav-mobile{display:none;flex-direction:column;background:var(--primary-2);padding:.4rem 1.25rem .9rem;gap:.1rem;}
.nav-mobile a{color:#e8eef6;text-decoration:none;padding:.65rem .3rem;border-bottom:1px solid rgba(255,255,255,.08);font-size:1rem;}
.nav-mobile a:last-child{border-bottom:none;}
.nav-mobile a.active{color:#fff;font-weight:700;}
.nav-mobile.show{display:flex;}

/* ===== Sections ===== */
section{scroll-margin-top:80px;}
section.block{padding:4.5rem 0;}
section.block-alt{background:var(--light);}
.section-title{font-size:1.9rem;color:var(--primary);margin-bottom:.7rem;line-height:1.3;}
.section-sub{color:var(--gray);margin-bottom:2rem;max-width:840px;}
h2,h3,h4{line-height:1.35;}

/* ===== Inner page header banner ===== */
.page-header{background:linear-gradient(125deg,var(--primary) 0%,var(--primary-2) 60%,var(--accent) 130%);color:#fff;padding:3.1rem 0 2.6rem;}
.page-header h1{font-size:2.05rem;line-height:1.25;margin-bottom:.55rem;color:#fff;}
.page-header p{opacity:.93;max-width:780px;font-size:1.02rem;}
.breadcrumb{font-size:.82rem;opacity:.8;margin-bottom:.7rem;letter-spacing:.02em;}
.breadcrumb a{color:#cfe0f2;text-decoration:none;}
.breadcrumb a:hover{color:#fff;}

/* ===== Hero Carousel (home only) ===== */
.hero{background:var(--primary);color:#fff;}
.hero-slider{position:relative;overflow:hidden;}
.hero-track{display:flex;transition:transform .55s ease;}
.hero-slide{position:relative;min-width:100%;min-height:560px;display:flex;align-items:center;}
.hero-bg{position:absolute;inset:0;z-index:1;background-color:#1c3f63;overflow:hidden;border:none;display:block;}
.hero-bg img{width:100%;height:100%;object-fit:cover;display:block;}
.hero-overlay{position:absolute;inset:0;z-index:2;background:linear-gradient(100deg,rgba(9,25,44,.70) 0%,rgba(9,25,44,.42) 55%,rgba(9,25,44,.18) 100%);}
.hero-content{position:relative;z-index:3;width:100%;max-width:1200px;margin:0 auto;padding:4.5rem 1.25rem;}
.hero-content h1{font-size:2.3rem;line-height:1.25;margin-bottom:.9rem;max-width:840px;}
.hero-sub{font-size:1.15rem;opacity:.95;margin-bottom:1rem;max-width:760px;}
.hero-desc{font-size:1rem;opacity:.88;max-width:700px;margin-bottom:1.3rem;}
.hero-cta{display:flex;gap:1rem;flex-wrap:wrap;margin-top:1.6rem;}
.btn{display:inline-block;padding:.8rem 1.6rem;border-radius:8px;text-decoration:none;font-weight:600;border:none;cursor:pointer;font-size:1rem;line-height:1.4;transition:transform .15s,box-shadow .15s,background .2s;}
.btn:hover{transform:translateY(-2px);}
.btn-primary{background:#fff;color:var(--primary);box-shadow:0 4px 14px rgba(0,0,0,.15);}
.btn-primary:hover{background:#f0f5fb;}
.btn-outline{border:1.5px solid #fff;color:#fff;background:rgba(255,255,255,.06);}
.btn-outline:hover{background:rgba(255,255,255,.16);}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover{background:var(--primary);}
.hero-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:6;width:48px;height:48px;border-radius:50%;border:1px solid rgba(255,255,255,.5);background:rgba(255,255,255,.12);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s;}
.hero-arrow:hover{background:rgba(255,255,255,.28);}
.hero-arrow svg{width:22px;height:22px;}
.hero-prev{left:1rem;}
.hero-next{right:1rem;}
.hero-dots{position:absolute;bottom:1.2rem;left:50%;transform:translateX(-50%);z-index:6;display:flex;gap:.55rem;}
.hero-dots button{width:12px;height:12px;border-radius:50%;border:none;background:rgba(255,255,255,.4);cursor:pointer;padding:0;transition:background .2s,transform .2s;}
.hero-dots button.active{background:#fff;transform:scale(1.25);}

/* ===== Grids & Cards ===== */
.grid-4{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem;}
.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:2rem;}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:1.8rem;box-shadow:var(--shadow);}
section.block-alt .card{background:#fff;}
.card h3{color:var(--primary);margin-bottom:.7rem;font-size:1.15rem;}
.card p{color:var(--gray);}
.card .card-img-box{margin-bottom:1.2rem;}
.card-sub{font-size:.9rem;color:var(--gray);margin-top:.4rem;}
.card-link{display:inline-block;margin-top:.9rem;font-weight:600;font-size:.92rem;text-decoration:none;}
.card-link:hover{text-decoration:underline;}

/* ===== Hero CTA enhanced ===== */
.hero-cta .btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 20px rgba(44,96,153,.4);padding:.9rem 1.8rem;font-size:1.05rem;}
.hero-cta .btn-primary:hover{background:var(--primary-2);box-shadow:0 8px 24px rgba(44,96,153,.5);}

/* ===== Image boxes ===== */
.card-img-box{
  background:linear-gradient(135deg,#eef4fb,#dbe7f3);
  border:1px solid #c5d6e8;
  border-radius:10px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:.35rem;text-align:center;color:#33577d;
  padding:1rem;aspect-ratio:4/3;width:100%;
}
.card-img-box svg{width:34px;height:34px;color:#2c6099;}
.card-img-box span{font-weight:700;font-size:.95rem;line-height:1.35;}
.card-img-box small{display:none;}
.icon-box{width:88px;height:88px;border-radius:16px;padding:.7rem;flex:none;margin-bottom:1.1rem;aspect-ratio:1/1;}
.icon-box svg{width:30px;height:30px;}
.icon-box span{font-size:.68rem;font-weight:700;color:#4a6a8c;line-height:1.25;}
.icon-box small{display:none;}

/* ===== CTA band (home) ===== */
.cta-band{background:linear-gradient(120deg,var(--primary),var(--accent));color:#fff;border-radius:16px;padding:2.8rem 2rem;text-align:center;}
.cta-band h2{color:#fff;font-size:1.7rem;margin-bottom:.6rem;}
.cta-band p{opacity:.94;max-width:640px;margin:0 auto 1.4rem;}
.cta-band .btn-outline{margin-left:.5rem;}
.section-cta{text-align:center;margin-top:2.2rem;}
.btn-ghost{display:inline-block;color:var(--accent);font-weight:600;text-decoration:none;border:1.5px solid var(--accent);padding:.72rem 1.6rem;border-radius:8px;transition:background .2s,color .2s;}
.btn-ghost:hover{background:var(--accent);color:#fff;}

/* ===== Tables ===== */
.table-wrap{overflow-x:auto;margin:1.5rem 0;}
table{width:100%;border-collapse:collapse;background:#fff;}
th,td{border:1px solid var(--border);padding:.85rem .9rem;text-align:left;vertical-align:top;}
th{background:var(--light);color:var(--primary);font-weight:700;}
tbody tr:nth-child(even){background:#fafcfe;}
.by-form{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.4rem;margin-top:1.2rem;}
.by-form li{list-style:none;background:var(--light);border-left:4px solid var(--accent);padding:.9rem 1.1rem;border-radius:0 8px 8px 0;min-height:90px;display:flex;align-items:center;}

/* ===== Forms ===== */
.form-wrap{max-width:100%;}
.form-group{margin-bottom:1.4rem;}
label{display:block;margin-bottom:.4rem;font-weight:600;color:var(--primary);}
input[type="text"],input[type="email"],input[type="tel"],textarea,select{width:100%;padding:.8rem .9rem;border:1px solid #c6d2e0;border-radius:8px;font-size:1rem;font-family:inherit;background:#fff;color:var(--text);line-height:1.5;}
textarea{min-height:150px;resize:vertical;}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(44,96,153,.15);}
.check-group{display:flex;flex-wrap:wrap;gap:.6rem 1.4rem;margin-top:.3rem;}
.check-group label{display:flex;align-items:center;gap:.4rem;font-weight:400;color:var(--text);margin:0;}
.check-group input[type="checkbox"]{width:auto;margin:0;}
.form-msg{display:none;margin-top:1rem;padding:.9rem 1.1rem;border-radius:8px;font-size:.95rem;}
.form-msg.success{background:#e8f6ec;border:1px solid #b8e0c4;color:#1c6b34;}
.form-msg.error{background:#fdeeee;border:1px solid #f0c4c4;color:#8c2f2f;}
.hp-field{position:absolute;left:-9999px;opacity:0;height:0;width:0;overflow:hidden;}

/* ===== FAQ ===== */
.faq-block{margin-top:2.5rem;}
.faq-item{border:1px solid var(--border);border-radius:8px;margin-bottom:.8rem;overflow:hidden;background:#fff;}
.faq-question{padding:1rem 1.2rem;background:#f8fafc;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:1rem;font-weight:600;color:var(--primary);user-select:none;}
.faq-question .faq-icon{flex:none;font-size:1.3rem;line-height:1;color:var(--accent);transition:transform .25s;}
.faq-item.open .faq-question .faq-icon{transform:rotate(45deg);}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-item.open .faq-answer{max-height:600px;}
.faq-answer-inner{padding:0 1.2rem 1rem 1.2rem;color:var(--gray);}

/* ===== Datasheet ===== */
.datasheet-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem;align-items:start;}
.datasheet-list{list-style:none;display:flex;flex-direction:column;gap:.8rem;}
.datasheet-list li{display:flex;justify-content:space-between;align-items:center;gap:1rem;background:var(--light);border:1px solid var(--border);border-radius:8px;padding:.85rem 1rem;}
.datasheet-list li b{color:var(--primary);}
.dl-btn{background:var(--accent);color:#fff;border:none;border-radius:6px;padding:.45rem 1rem;cursor:pointer;font-size:.88rem;text-decoration:none;white-space:nowrap;}
.dl-btn:hover{background:var(--primary);}

/* ===== About ===== */
.about-intro p{margin-bottom:1.1rem;color:var(--gray);}
.about-intro p b{color:var(--primary);}
.about-images{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin:2rem 0;}
.about-fig figcaption{font-size:.88rem;color:var(--gray);margin-top:.5rem;text-align:center;}

/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:400px 1fr;gap:2rem;align-items:start;}
.info-list{list-style:none;display:flex;flex-direction:column;gap:1rem;}
.info-list li{display:flex;gap:.8rem;align-items:flex-start;}
.info-list svg{width:22px;height:22px;color:var(--accent);flex:none;margin-top:.15rem;}
.info-list b{color:var(--primary);}
.info-list p{color:var(--gray);}

/* ===== Thanks page ===== */
.thanks-wrap{max-width:640px;margin:0 auto;text-align:center;padding:5.5rem 1.25rem;min-height:62vh;display:flex;flex-direction:column;justify-content:center;}
.thanks-icon{width:84px;height:84px;border-radius:50%;background:#e8f6ec;color:#1c8a4a;display:flex;align-items:center;justify-content:center;margin:0 auto 1.4rem;}
.thanks-icon svg{width:44px;height:44px;}
.thanks-wrap h1{color:var(--primary);margin-bottom:.8rem;font-size:1.9rem;}
.thanks-wrap p{color:var(--gray);margin-bottom:1.6rem;font-size:1.02rem;}
.thanks-btns{display:flex;gap:.9rem;justify-content:center;flex-wrap:wrap;}

/* ===== Footer ===== */
footer{background:var(--primary);color:#b9c8d9;padding:1.5rem 0 1.05rem;font-size:.84rem;line-height:1.65;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1.4fr;gap:1.6rem;}
.footer-grid h4{color:#fff;font-size:.88rem;font-weight:600;letter-spacing:.03em;margin-bottom:.5rem;}
.footer-brand{font-size:1.05rem;font-weight:700;color:#fff;letter-spacing:.04em;margin-bottom:.35rem;}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:.25rem;}
.footer-links a{color:#b9c8d9;text-decoration:none;}
.footer-links a:hover{color:#fff;text-decoration:underline;}
.footer-contact{list-style:none;display:flex;flex-direction:column;gap:.25rem;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);margin-top:1.1rem;padding-top:.75rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;color:#8fa3ba;font-size:.76rem;}

/* ===== Cookie consent ===== */
.cookie-consent{position:fixed;left:0;right:0;bottom:0;z-index:300;background:rgba(13,30,52,.97);color:#e8eef6;padding:1rem 1.25rem;box-shadow:0 -4px 20px rgba(0,0,0,.25);display:none;}
.cookie-consent.show{display:block;}
.cookie-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:1.2rem;flex-wrap:wrap;}
.cookie-inner p{font-size:.92rem;max-width:820px;}
.cookie-btns{display:flex;gap:.6rem;flex:none;}
.cookie-btns button{border:none;border-radius:6px;padding:.5rem 1.2rem;cursor:pointer;font-size:.9rem;font-weight:600;}
.cookie-accept{background:var(--accent);color:#fff;}
.cookie-accept:hover{background:var(--accent-2);}
.cookie-decline{background:transparent;border:1px solid rgba(255,255,255,.45) !important;color:#e8eef6;}

/* ===== WeChat float & modal ===== */
.float-actions{position:fixed;right:1.4rem;bottom:1.4rem;z-index:200;display:flex;flex-direction:column;align-items:center;gap:.85rem;}
.wechat-float{position:relative;width:58px;height:58px;border-radius:50%;background:#07c160;color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 6px 18px rgba(7,193,96,.4);transition:transform .2s;text-decoration:none;border:none;}
.wechat-float:hover{transform:scale(1.08);}
.wechat-float svg{width:30px;height:30px;}
.email-float{position:relative;width:58px;height:58px;border-radius:50%;background:#2c6099;color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 6px 18px rgba(44,96,153,.4);transition:transform .2s;text-decoration:none;}
.email-float:hover{transform:scale(1.08);background:#1d3a5f;}
.email-float svg{width:28px;height:28px;}
.wechat-modal{position:fixed;inset:0;z-index:320;background:rgba(9,25,44,.6);display:none;align-items:center;justify-content:center;padding:1rem;}
.wechat-modal.show{display:flex;}
.wechat-box{background:#fff;border-radius:14px;padding:2rem;max-width:340px;width:100%;text-align:center;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.3);}
.wechat-close{position:absolute;top:.7rem;right:.9rem;background:none;border:none;font-size:1.5rem;line-height:1;color:#8a94a3;cursor:pointer;}
.wechat-box h4{color:var(--primary);margin-bottom:.3rem;}
.wechat-box .wechat-id{margin-top:.8rem;color:var(--gray);font-size:.95rem;}
.wechat-qr-box{width:220px;height:220px;margin:1.1rem auto 0;border-radius:12px;background:linear-gradient(135deg,#eafaf0,#d4f2e0);border:1px solid #b5e6c6;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.5rem;color:#0a8a48;font-weight:600;font-size:.85rem;text-align:center;padding:1rem;}

/* ===== Language blocks ===== */
[lang="zh"]{display:none;}
html.lang-zh [lang="zh"]{display:block;}
html.lang-zh [lang="en"]{display:none;}

/* ===== Mobile ===== */
@media(max-width:900px){
  .nav-desktop{display:none;}
  .menu-toggle{display:flex;}
  .hero-slide{min-height:420px;}
  .hero-content{padding:3.5rem 1.25rem;}
  .hero-content h1{font-size:1.45rem;}
  .hero-sub{font-size:.95rem;}
  .hero-desc{font-size:.88rem;opacity:.85;}
  .hero-arrow{width:36px;height:36px;}
  .hero-cta{gap:.7rem;}
  .hero-cta .btn{padding:.7rem 1.2rem;font-size:.92rem;}
  .hero-cta .btn-primary{padding:.7rem 1.4rem;font-size:.95rem;}
  section.block{padding:2.8rem 0;}
  .page-header{padding:2.2rem 0 1.8rem;}
  .page-header h1{font-size:1.5rem;}
  .contact-grid{grid-template-columns:1fr;}
  .datasheet-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:1.5rem;}
  .about-images{grid-template-columns:1fr;}
  .header-wrap{padding:.65rem 1rem;}
  .logo{font-size:1.05rem;}
  .logo-mark{width:34px;height:34px;}
  .lang-switch button{padding:.3rem .6rem;font-size:.8rem;}
  .cta-band .btn-outline{margin-left:0;}
  .section-title{font-size:1.55rem;}
  .card{padding:1.4rem;}
  /* Cookie banner mobile */
  .cookie-consent{padding:.7rem 1rem;}
  .cookie-inner{gap:.7rem;}
  .cookie-inner p{font-size:.8rem;line-height:1.5;}
  .cookie-btns button{padding:.45rem .9rem;font-size:.82rem;}
  /* Floating buttons mobile */
  .float-actions{right:1rem;bottom:1rem;gap:.6rem;}
  .email-float,.wechat-float{width:48px;height:48px;}
  .email-float svg{width:24px;height:24px;}
  .wechat-float svg{width:26px;height:26px;}
  .floating-quote{display:none;}
}
@media(max-width:480px){
  .hero-slide{min-height:380px;}
  .hero-content{padding:2.8rem 1.1rem;}
  .hero-content h1{font-size:1.25rem;line-height:1.3;}
  .hero-sub{font-size:.88rem;line-height:1.5;}
  .hero-desc{display:none;}
  .hero-cta .btn{width:100%;text-align:center;}
  .hero-cta{flex-direction:column;}
  .trust-num{font-size:1.6rem;}
  .trust-label{font-size:.75rem;}
  .ind-item svg{width:26px;height:26px;}
  .ind-item span{font-size:.7rem;}
}
@media(prefers-reduced-motion:reduce){
  .hero-track{transition:none;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1 !important;transform:none !important;transition:none !important;}
}

/* ===== Scroll reveal animation ===== */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .55s ease,transform .55s ease;}
.reveal.active{opacity:1;transform:translateY(0);}
.card{transition:transform .25s ease,box-shadow .25s ease;}
.card:hover{transform:translateY(-4px);box-shadow:0 10px 28px rgba(25,52,84,.15);}

/* Trust Stats Bar */
.trust-bar{background:var(--primary);color:#fff;padding:1.8rem 0;}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;text-align:center;}
.trust-num{font-size:2.2rem;font-weight:800;color:var(--accent-light,#5a9fd4);line-height:1;}
.trust-label{font-size:0.85rem;margin-top:0.3rem;opacity:0.9;}
@media(max-width:600px){.trust-grid{grid-template-columns:repeat(2,1fr);gap:1.2rem;}.trust-num{font-size:1.8rem;}}

/* Industries Icon Strip */
.industries-strip{background:#f5f7fa;padding:1.5rem 0;}
.industries-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:0.8rem;text-align:center;}
.ind-item{display:flex;flex-direction:column;align-items:center;gap:0.4rem;color:var(--primary);}
.ind-item svg{width:32px;height:32px;}
.ind-item span{font-size:0.78rem;font-weight:600;}
@media(max-width:768px){.industries-grid{grid-template-columns:repeat(3,1fr);gap:1rem;}}

/* Floating Quote Button */
.floating-quote{position:fixed;right:20px;bottom:140px;z-index:999;background:var(--accent);color:#fff;padding:0.7rem 1.2rem;border-radius:30px;font-size:0.85rem;font-weight:600;box-shadow:0 4px 15px rgba(0,0,0,0.2);text-decoration:none;transition:transform .2s;}
.floating-quote:hover{transform:translateY(-2px);background:var(--primary);}
@media(max-width:600px){.floating-quote{right:12px;bottom:130px;padding:0.6rem 1rem;font-size:0.78rem;}}

/* Datasheet download cards */
.ds-card{display:flex;align-items:center;gap:1rem;padding:1rem;background:#f8f9fb;border-radius:10px;margin-bottom:0.8rem;transition:box-shadow .2s;}
.ds-card:hover{box-shadow:0 4px 12px rgba(0,0,0,0.08);}
.ds-icon{width:48px;height:48px;min-width:48px;background:var(--primary);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;}
.ds-icon svg{width:24px;height:24px;}
.ds-info{flex:1;}
.ds-info h4{margin:0;font-size:0.95rem;color:var(--primary);}
.ds-info p{margin:0.2rem 0 0;font-size:0.8rem;color:#666;}
.ds-download{color:var(--accent);font-weight:600;font-size:0.85rem;text-decoration:none;white-space:nowrap;}

/* About image descriptions */
.about-img-desc{font-size:0.85rem;color:#555;margin-top:0.5rem;line-height:1.6;}

/* Form row (2 columns) */
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem;}
@media(max-width:600px){.form-row{grid-template-columns:1fr;}}

/* Select dropdown */

/* ===== Optimized Form Styles ===== */
.form-wrap{padding:2rem !important;}
.form-wrap h3{margin-bottom:1.5rem;font-size:1.3rem;}
.form-group{margin-bottom:1.1rem;}
.form-group label{font-size:0.88rem;margin-bottom:0.4rem;}
.form-group label::after{content:"";}
.form-row{gap:1rem;}
.form-row .form-group{margin-bottom:0;}
.form-row + .form-group{margin-top:1.1rem;}

/* 统一输入框高度 */
.form-group input[type="text"],
.form-group input[type="email"],
.form-group select,
.form-group textarea{
  padding:0.75rem 0.9rem;
  border:1px solid #c6d2e0;
  border-radius:8px;
  font-size:0.95rem;
  transition:border-color .2s,box-shadow .2s;
  background:#fff;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus{
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(44,96,153,.12);
}
.form-group textarea{min-height:130px;resize:vertical;}

/* 下拉框箭头 */
.form-group select{
  appearance:none;
  -webkit-appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23193454' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 0.9rem center;
  padding-right:2.2rem;
  cursor:pointer;
}

/* 提交按钮全宽 */
.form-group .btn-accent{
  width:100%;
  padding:0.85rem;
  font-size:1rem;
  font-weight:600;
  border-radius:8px;
  border:none;
  cursor:pointer;
  transition:background .2s,transform .1s;
}
.form-group .btn-accent:hover{background:var(--primary);transform:translateY(-1px);}
.form-group .btn-accent:active{transform:translateY(0);}

/* 必填星号 */
.form-group label:contains("*"){color:var(--primary);}

/* Back to Top Button */
#backToTop{
  position:fixed;
  right:20px;
  bottom:80px;
  width:42px;
  height:42px;
  border-radius:50%;
  background:var(--primary);
  color:#fff;
  border:none;
  font-size:1.2rem;
  cursor:pointer;
  box-shadow:0 3px 12px rgba(0,0,0,0.2);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .3s,transform .3s,visibility .3s,background .2s;
  z-index:998;
}
#backToTop.show{opacity:1;visibility:visible;transform:translateY(0);}
#backToTop:hover{background:var(--accent);}
@media(max-width:600px){#backToTop{right:12px;bottom:70px;width:38px;height:38px;font-size:1rem;}}

/* Contact page: increase left info spacing */
.info-list li{padding:0.85rem 0 !important;border-bottom:1px solid #f0f2f5;}
.info-list li:last-child{border-bottom:none;}
.info-list{margin-bottom:0;}

/* Small quote button on product cards */
.btn-sm{padding:0.45rem 1rem;font-size:0.82rem;border-radius:6px;display:inline-block;margin-top:0.6rem;}
.product-card .btn-outline{border:1px solid var(--accent);color:var(--accent);background:transparent;}
.product-card .btn-outline:hover{background:var(--accent);color:#fff;}