:root{
  --navy:#0d2c54;
  --navy2:#123a6d;
  --blue:#0f6ce0;
  --blue-dk:#0b57b5;
  --blue-lt:#eaf3fe;
  --text:#243247;
  --muted:#64748b;
  --line:#e5eaf1;
  --bg:#ffffff;
  --bg-alt:#f4f8fc;
  --radius:12px;
  --shadow:0 6px 24px rgba(13,44,84,.08);
  --shadow-lg:0 18px 44px rgba(13,44,84,.14);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.75;font-size:16px}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
.container{max-width:1180px;margin:0 auto;padding:0 22px}

/* language toggle */
body.en .zh{display:none!important}
body:not(.en) .en{display:none!important}

/* ---------- header ---------- */
header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:12px}
.brand>img{height:44px;width:auto}
.brand .bt{display:flex;flex-direction:column;line-height:1.25}
.brand a{color:var(--navy);font-weight:800;font-size:19px;letter-spacing:.5px}
.brand small{color:#8ba0bd;font-size:11px;letter-spacing:1.4px;text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:30px;list-style:none}
.nav-links a{color:#3d4f68;font-size:15.5px;padding:8px 2px;position:relative;transition:.25s}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2.5px;background:var(--blue);border-radius:2px;transition:.3s}
.nav-links a:hover,.nav-links a.active{color:var(--blue)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.lang-btn{background:#fff;border:1px solid var(--blue);color:var(--blue);border-radius:20px;padding:5px 16px;cursor:pointer;font-size:13px;transition:.25s}
.lang-btn:hover{background:var(--blue);color:#fff}
.burger{display:none;background:none;border:none;cursor:pointer;padding:8px}
.burger span{display:block;width:22px;height:2px;background:var(--navy);margin:5px 0;transition:.2s}

/* ---------- hero ---------- */
.hero{position:relative;color:#fff;overflow:hidden;background:linear-gradient(100deg,rgba(7,26,54,.82) 0%,rgba(10,38,80,.62) 45%,rgba(15,108,224,.28) 100%),url(img/factory-building.jpg) center/cover no-repeat;padding:140px 0 130px}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:6px;background:linear-gradient(90deg,var(--blue),#4da3ff)}
.hero-badge{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(255,255,255,.55);background:rgba(255,255,255,.12);backdrop-filter:blur(4px);color:#fff;font-size:13px;padding:6px 18px;border-radius:30px;margin-bottom:28px;letter-spacing:.5px}
.hero-badge::before{content:"";width:7px;height:7px;border-radius:50%;background:#6fc2ff;box-shadow:0 0 8px #6fc2ff;animation:blink 1.8s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.35}}
.hero h1{font-size:50px;line-height:1.24;max-width:840px;font-weight:800;letter-spacing:1px;text-shadow:0 2px 18px rgba(4,18,40,.4)}
.hero h1 .gt{color:#6fc2ff}
.hero p{margin-top:22px;max-width:660px;color:#dbe8f8;font-size:18.5px}
.hero .btns{margin-top:42px;display:flex;gap:16px;flex-wrap:wrap}
.page-hero{position:relative;color:#fff;background:linear-gradient(100deg,rgba(7,26,54,.84),rgba(13,58,120,.6)),url(img/factory-office.jpg) center/cover;padding:88px 0;overflow:hidden}
.page-hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:5px;background:linear-gradient(90deg,var(--blue),#4da3ff)}
.page-hero h1{font-size:38px;font-weight:800;letter-spacing:1px}
.page-hero p{color:#dbe8f8;margin-top:10px;font-size:16.5px}
.btn{display:inline-block;padding:13px 36px;border-radius:8px;font-size:15.5px;transition:.25s}
.btn-primary{background:linear-gradient(100deg,var(--blue),#2f8bff);color:#fff;box-shadow:0 8px 22px rgba(15,108,224,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(15,108,224,.45)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.75);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14)}

/* ---------- sections ---------- */
section{padding:88px 0}
section.alt{background:var(--bg-alt)}
.sec-head{text-align:center;margin-bottom:52px}
.sec-head h2{font-size:33px;color:var(--navy);font-weight:800;letter-spacing:.5px}
.sec-head .sub{color:var(--muted);margin-top:12px;font-size:15.5px;max-width:820px;margin-left:auto;margin-right:auto}
.sec-head::after{content:"";display:block;width:58px;height:4px;background:linear-gradient(90deg,var(--blue),#4da3ff);margin:18px auto 0;border-radius:3px}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.on{opacity:1;transform:none}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 12px;box-shadow:var(--shadow);position:relative;overflow:hidden;transition:.3s}
.stat::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--blue),#4da3ff);opacity:0;transition:.3s}
.stat:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.stat:hover::before{opacity:1}
.stat b{font-size:42px;color:var(--blue);font-weight:800;font-variant-numeric:tabular-nums;line-height:1.2}
.stat b i{font-style:normal;font-size:22px}
.stat b span{display:inline;color:inherit;font-size:inherit;margin:0}
.stat > span{display:block;color:var(--muted);margin-top:8px;font-size:14.5px}

/* ---------- cards ---------- */
.grid{display:grid;gap:28px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.35s;display:flex;flex-direction:column;box-shadow:var(--shadow)}
.card:hover{transform:translateY(-7px);box-shadow:var(--shadow-lg);border-color:#cfe1f8}
.card .thumb{height:210px;overflow:hidden;background:var(--bg-alt)}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover .thumb img{transform:scale(1.06)}
.card .thumb.contain{background:#fff;border-bottom:1px solid var(--line)}
.card .thumb.contain img{object-fit:contain;padding:14px}
.card .body{padding:24px 26px 28px;flex:1}
.card h3{font-size:18.5px;color:var(--navy);margin-bottom:8px}
.card p{color:var(--muted);font-size:14.5px}
.card .body a.more{display:inline-block;margin-top:14px;font-size:14.5px;font-weight:600}
.card .body a.more:hover{text-decoration:underline}

/* ---------- feature list ---------- */
.features{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.feature{background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:10px;padding:24px 26px;box-shadow:var(--shadow)}
.feature h3{font-size:17px;color:var(--navy);margin-bottom:6px}
.feature p{color:var(--muted);font-size:14.5px}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1.1fr 1fr;gap:52px;align-items:center}
.split img{border-radius:var(--radius);box-shadow:var(--shadow-lg)}
.split h2{font-size:30px;color:var(--navy);font-weight:800;margin-bottom:18px}
.split p{color:var(--muted);margin-bottom:12px}
.checks{list-style:none;margin-top:10px}
.checks li{padding-left:32px;position:relative;margin-bottom:14px;color:var(--text)}
.checks li::before{content:"✓";position:absolute;left:0;top:1px;width:21px;height:21px;border-radius:50%;background:var(--blue-lt);color:var(--blue);font-weight:700;font-size:13px;display:flex;align-items:center;justify-content:center;line-height:1}

/* ---------- clients ---------- */
.clients{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.clients span{background:#fff;border:1px solid var(--line);border-radius:30px;padding:10px 26px;color:var(--navy);font-size:14.5px;box-shadow:var(--shadow);transition:.3s}
.clients span:hover{transform:translateY(-3px);border-color:#bcd7f7;color:var(--blue);box-shadow:var(--shadow-lg)}

/* ---------- tables ---------- */
table{width:100%;border-collapse:collapse;background:#fff;font-size:14.5px;box-shadow:var(--shadow);border-radius:10px;overflow:hidden}
th,td{border:1px solid var(--line);padding:13px 17px;text-align:left}
th{background:linear-gradient(100deg,var(--navy),var(--navy2));color:#fff;font-weight:600;letter-spacing:.5px;border-color:var(--navy2)}
tr:nth-child(even){background:var(--bg-alt)}

/* ---------- gallery ---------- */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.gallery figure{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;box-shadow:var(--shadow);transition:.3s}
.gallery figure:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.gallery img{width:100%;height:178px;object-fit:cover;transition:transform .5s}
.gallery figure:hover img{transform:scale(1.05)}
.gallery.contain img{object-fit:contain;padding:10px;background:#fff}
.gallery figcaption{padding:11px 12px;font-size:13.5px;color:var(--muted);text-align:center;border-top:1px solid var(--line);background:#fbfdff}

/* ---------- timeline ---------- */
.timeline{list-style:none;position:relative;margin-left:10px}
.timeline::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:3px;background:linear-gradient(180deg,var(--blue),#9cc8fa);border-radius:2px}
.timeline li{padding:0 0 30px 34px;position:relative}
.timeline li::before{content:"";position:absolute;left:-6.5px;top:8px;width:16px;height:16px;border-radius:50%;background:#fff;border:4px solid var(--blue);box-shadow:0 0 0 4px rgba(15,108,224,.12)}
.timeline b{color:var(--navy);display:block;font-size:17.5px;letter-spacing:.5px}
.timeline span{color:var(--muted);font-size:14.5px}

/* ---------- team ---------- */
.team{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.member{background:#fff;border:1px solid var(--line);border-top:4px solid var(--blue);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:.3s;text-align:center}
.member:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.member .avatar{width:118px;height:118px;border-radius:50%;margin:0 auto 16px;overflow:hidden;border:3px solid var(--blue-lt);box-shadow:0 6px 18px rgba(13,44,84,.12);transition:.3s}
.member:hover .avatar{border-color:#bcd7f7;transform:scale(1.04)}
.member .avatar img{width:100%;height:100%;object-fit:cover}
.member h3{font-size:16.5px;color:var(--navy)}
.member .role{color:var(--blue);font-size:13.5px;margin-bottom:8px;font-weight:600}
.member p{color:var(--muted);font-size:13.5px;line-height:1.65}

/* ---------- contact ---------- */
.contact-wrap{display:grid;grid-template-columns:1fr 1.2fr;gap:44px;align-items:start}
.info-block{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.info-block h3{color:var(--navy);margin-bottom:18px;font-size:20px}
.info-item{display:flex;gap:13px;margin-bottom:15px;font-size:15px}
.info-item .ico{color:var(--blue);font-weight:700;min-width:22px}
form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
label{display:block;font-size:14px;color:var(--navy);margin:15px 0 6px;font-weight:600}
input,textarea,select{width:100%;padding:12px 15px;border:1px solid #ccd8e6;border-radius:8px;font-size:15px;font-family:inherit;background:#fff;transition:.25s}
input:focus,textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(15,108,224,.12)}
textarea{min-height:135px;resize:vertical}
.form-note{font-size:13px;color:var(--muted);margin-top:12px}
#form-status{margin-top:14px;font-size:14px;display:none}
#form-status.ok{display:block;color:#15803d}
#form-status.err{display:block;color:#b91c1c}

/* ---------- cta band ---------- */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(105deg,var(--navy) 0%,var(--navy2) 55%,#155bb0 100%);color:#fff;text-align:center;padding:78px 0}
.cta-band::before{content:"";position:absolute;top:-60%;left:-20%;width:55%;height:220%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.07),transparent);transform:rotate(12deg);animation:sweep 7s linear infinite}
@keyframes sweep{from{left:-60%}to{left:120%}}
.cta-band h2{font-size:30px;font-weight:800;margin-bottom:12px;position:relative}
.cta-band p{color:#c3d6f0;margin-bottom:28px;position:relative}

/* ---------- footer ---------- */
footer{background:var(--navy);color:#a7bcd8;padding:56px 0 26px;font-size:14px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:36px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.12)}
.foot-grid h4{color:#fff;margin-bottom:14px;font-size:16px}
.foot-grid ul{list-style:none}
.foot-grid li{margin-bottom:8px}
.foot-grid a{color:#a7bcd8}
.foot-grid a:hover{color:#fff}
.copyright{text-align:center;padding-top:24px;font-size:13px}
.copyright a{color:#a7bcd8}
.copyright a:hover{color:#fff}

/* ---------- production bases ---------- */
.base .thumb{height:195px}
.kv{display:grid;grid-template-columns:96px 1fr;gap:0 12px;padding:9px 0;border-bottom:1px solid var(--line);font-size:14px;align-items:start}
.kv:last-child{border-bottom:none}
.kv b{color:var(--navy);font-weight:600}
.kv div{color:var(--muted)}
.kv .hl{color:var(--blue);font-weight:600}

/* ---------- product detail ---------- */
.crumbs{font-size:13.5px;color:#9db4d4;margin-bottom:14px}
.crumbs a{color:#c9ddf5}
.crumbs a:hover{color:#fff}
.spec-note{background:var(--blue-lt);border:1px solid #cfe1f8;border-radius:10px;padding:16px 20px;font-size:14px;color:#33517a;margin-top:26px}
.step-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;box-shadow:var(--shadow);position:relative}
.step::before{counter-increment:step;content:counter(step);display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;background:linear-gradient(120deg,var(--blue),#2f8bff);color:#fff;font-weight:800;font-size:17px;margin-bottom:14px;box-shadow:0 6px 14px rgba(15,108,224,.3)}
.step h3{font-size:16px;color:var(--navy);margin-bottom:6px}
.step p{font-size:13.5px;color:var(--muted)}
.detail-item{display:grid;grid-template-columns:300px 1fr;gap:34px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px;margin-bottom:26px;align-items:center}
.detail-item .pic{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.detail-item .pic img{width:100%;height:230px;object-fit:contain;padding:10px}
.detail-item h3{font-size:20px;color:var(--navy);margin-bottom:10px}
.detail-item .pn{display:inline-block;background:var(--blue-lt);color:var(--blue-dk);border-radius:6px;padding:3px 12px;font-size:13px;font-weight:600;margin-bottom:12px;font-family:ui-monospace,Consolas,monospace}
.detail-item p{color:var(--muted);font-size:14.5px;margin-bottom:8px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tag-row em{font-style:normal;background:#f1f5fa;border:1px solid var(--line);color:#4a5f7d;border-radius:20px;padding:3px 14px;font-size:12.5px}

/* ---------- responsive ---------- */
@media(max-width:900px){
  .g3,.g4,.stats,.team,.gallery{grid-template-columns:repeat(2,1fr)}
  .step-flow{grid-template-columns:repeat(2,1fr)}
  .detail-item{grid-template-columns:1fr}
  .split,.contact-wrap,.features,.g2{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:34px}
  .hero{padding:96px 0 84px}
  .nav-links{position:fixed;top:74px;left:0;right:0;background:#fff;flex-direction:column;padding:22px;gap:18px;display:none;box-shadow:0 14px 30px rgba(13,44,84,.12)}
  .nav-links.open{display:flex}
  .burger{display:block}
}
@media(max-width:560px){
  .g3,.g4,.stats,.team,.gallery,.form-row,.foot-grid{grid-template-columns:1fr}
  .hero{padding:72px 0 62px}
  .hero h1{font-size:28px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}