/* ============ Steel Star Group — Global Styles ============ */
:root{
  --navy:#0e1f38; --navy-2:#122a4a; --steel:#3e5c76;
  --accent:#e8960e; --accent-dark:#c17a05; --accent-soft:#fcf1da;
  --gold:#f5b31c;
  --bg:#f5f7fa; --card:#ffffff; --line:#e2e8ef;
  --text:#1b2633; --muted:#5b6b7c; --white:#ffffff;
  --radius:14px; --shadow:0 10px 30px rgba(13,27,42,.08);
  --shadow-lg:0 18px 50px rgba(13,27,42,.16);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","PingFang TC","Noto Sans CJK TC",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.7;font-size:16px;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{width:min(1200px,92%);margin:0 auto}
h1,h2,h3,h4{line-height:1.25;font-weight:700}

/* ---------- Header ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;transition:background .3s,box-shadow .3s;padding:14px 0}
.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{display:flex;align-items:center;gap:10px;color:#fff}
.brand svg{width:34px;height:34px;flex:none}
.brand-name{font-weight:800;font-size:1.05rem;letter-spacing:.06em;line-height:1.1}
.brand-sub{font-size:.62rem;letter-spacing:.24em;opacity:.75;text-transform:uppercase}
/* header brand: logo + name on top row, tagline spanning below both */
.brand-header{flex-direction:column;align-items:flex-start;gap:4px}
.brand-row{display:flex;align-items:center;gap:10px}
.brand-header .brand-name{white-space:nowrap}
.brand-header .brand-sub{letter-spacing:.16em;opacity:.8;white-space:nowrap}
/* logo turns pure white over dark background, original colors on light header */
.brand-row .logo-white{display:none}
.site-header:not(.scrolled) .logo-white{display:block}
.site-header:not(.scrolled) .logo-color{display:none}
.main-nav ul{display:flex;gap:4px}
.main-nav a{color:rgba(255,255,255,.88);padding:9px 13px;border-radius:8px;font-size:.92rem;font-weight:500;transition:.2s}
.main-nav a:hover{background:rgba(255,255,255,.12);color:#fff}
.main-nav a.active{color:#fff;background:rgba(255,255,255,.16)}
.header-tools{display:flex;align-items:center;gap:10px}
.lang-switch{position:relative}
.lang-btn{display:flex;align-items:center;gap:6px;color:#fff;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);padding:7px 12px;border-radius:8px;cursor:pointer;font-size:.85rem;font-family:var(--font)}
.lang-btn svg{width:14px;height:14px}
.lang-menu{position:absolute;top:calc(100% + 8px);right:0;background:#fff;border-radius:10px;box-shadow:var(--shadow-lg);min-width:150px;padding:6px;display:none;border:1px solid var(--line)}
.lang-menu.open{display:block}
.lang-menu a{display:flex;justify-content:space-between;align-items:center;padding:9px 12px;border-radius:7px;color:var(--text);font-size:.9rem}
.lang-menu a:hover{background:var(--bg)}
.lang-menu a.active{color:var(--accent);font-weight:600}
.lang-menu .tick{opacity:0;font-weight:700}
.lang-menu a.active .tick{opacity:1}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.burger span{width:24px;height:2px;background:#fff;border-radius:2px;transition:.25s}
.site-header.scrolled{background:#fff;box-shadow:0 2px 18px rgba(13,27,42,.1)}
.site-header.scrolled .brand{color:var(--navy)}
.site-header.scrolled .main-nav a{color:var(--text)}
.site-header.scrolled .main-nav a:hover{background:var(--bg);color:var(--accent)}
.site-header.scrolled .main-nav a.active{color:var(--accent);background:var(--accent-soft)}
.site-header.scrolled .lang-btn{color:var(--text);border-color:var(--line);background:#fff}
.site-header.scrolled .burger span{background:var(--navy)}
/* mobile nav */
.mobile-nav{position:fixed;inset:0;background:var(--navy);z-index:999;display:flex;flex-direction:column;justify-content:center;padding:8vh 10vw;transform:translateX(100%);transition:transform .3s ease}
.mobile-nav.open{transform:translateX(0)}
.mobile-nav a{color:#fff;font-size:1.35rem;font-weight:600;padding:13px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.mobile-nav .langs{margin-top:26px;display:flex;gap:10px}
.mobile-nav .langs a{font-size:.95rem;border:1px solid rgba(255,255,255,.3);border-radius:8px;padding:8px 16px;font-weight:500}
body.nav-open .burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.nav-open .burger span:nth-child(2){opacity:0}
body.nav-open .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:94vh;display:flex;align-items:center;color:#fff;background:var(--navy)}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.42}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(9,20,33,.92) 15%,rgba(9,20,33,.55) 60%,rgba(9,20,33,.35))}
.hero .container{position:relative;z-index:2;padding:130px 0 90px}
.hero-kicker{display:inline-flex;align-items:center;gap:10px;font-size:.8rem;letter-spacing:.22em;text-transform:uppercase;color:var(--gold);border:1px solid rgba(255,178,92,.4);padding:8px 16px;border-radius:100px;margin-bottom:26px;background:rgba(242,117,31,.12)}
.hero h1{font-size:clamp(2.1rem,4.6vw,3.6rem);max-width:820px;font-weight:800;letter-spacing:-.01em}
.hero h1 em{font-style:normal;color:var(--gold)}
.hero p{margin-top:20px;max-width:640px;font-size:clamp(1rem,1.4vw,1.15rem);color:rgba(255,255,255,.82)}
.hero-cta{margin-top:36px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:9px;padding:14px 30px;border-radius:10px;font-weight:600;font-size:.95rem;transition:.25s;cursor:pointer;border:0;font-family:var(--font)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 24px rgba(242,117,31,.35)}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-2px)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);transform:translateY(-2px)}
.btn-outline{border:1.5px solid var(--accent);color:var(--accent)}
.btn-outline:hover{background:var(--accent);color:#fff}
.hero-stats{position:relative;z-index:2;border-top:1px solid rgba(255,255,255,.15);background:rgba(10,22,36,.55);backdrop-filter:blur(6px)}
.hero-stats .container{display:grid;grid-template-columns:repeat(4,1fr);padding:26px 0}
.stat .num{font-size:clamp(1.6rem,2.6vw,2.3rem);font-weight:800;color:#fff}
.stat .num small{font-size:.55em;font-weight:700;color:var(--gold);margin-left:2px}
.stat .lbl{font-size:.82rem;color:rgba(255,255,255,.65);margin-top:2px}

/* ---------- Sections ---------- */
.section{padding:clamp(38px,5.5vw,68px) 0}
.section.alt{background:#fff}
.section-head{max-width:680px;margin-bottom:clamp(24px,3.5vw,36px)}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--accent);font-weight:700;font-size:.8rem;letter-spacing:.18em;text-transform:uppercase;margin-bottom:10px}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--accent)}
.section-head h2{font-size:clamp(1.6rem,3vw,2.3rem);color:var(--navy);letter-spacing:-.01em}
.section-head p{margin-top:14px;color:var(--muted);font-size:1.02rem}

/* intro split */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(30px,5vw,64px);align-items:center}
.split-img{position:relative}
.split-img img{border-radius:var(--radius);box-shadow:var(--shadow-lg);width:100%;object-fit:cover}
.split-img .badge{position:absolute;bottom:-22px;right:-14px;background:var(--accent);color:#fff;border-radius:12px;padding:16px 22px;box-shadow:var(--shadow-lg);text-align:center}
.split-img .badge b{display:block;font-size:1.5rem;line-height:1.1}
.split-img .badge span{font-size:.75rem;opacity:.9}
.split-body h2{font-size:clamp(1.5rem,2.6vw,2.1rem);color:var(--navy)}
.split-body p{margin-top:16px;color:var(--muted)}
.check-list{margin-top:20px;display:grid;gap:10px}
.check-list li{display:flex;gap:10px;align-items:flex-start;color:var(--text);font-size:.97rem}
.check-list li::before{content:"";flex:none;width:20px;height:20px;margin-top:3px;border-radius:50%;background:var(--accent-soft);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23f2751f' stroke-width='3'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E");background-size:12px;background-position:center;background-repeat:no-repeat}

/* cards */
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.3s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.card-img{position:relative;overflow:hidden;aspect-ratio:16/10;background:#dde3ea}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover .card-img img{transform:scale(1.06)}
.card-body{padding:22px 24px 26px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:1.12rem;color:var(--navy)}
.card-body p{margin-top:9px;color:var(--muted);font-size:.92rem;flex:1}
.card-link{margin-top:16px;color:var(--accent);font-weight:600;font-size:.9rem;display:inline-flex;align-items:center;gap:6px}
.card-link:hover{gap:10px}
.chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}
.chip{background:var(--bg);border:1px solid var(--line);color:var(--steel);font-size:.78rem;font-weight:600;padding:4px 11px;border-radius:100px}
.chip.hot{background:var(--accent-soft);border-color:#f8c9a2;color:var(--accent-dark)}
.mills{margin-top:12px;font-size:.8rem;color:var(--muted);line-height:1.55}
.mills b{color:var(--navy);font-weight:600}

/* product category tiles on home */
.tile{position:relative;border-radius:var(--radius);overflow:hidden;min-height:230px;display:flex;align-items:flex-end;color:#fff;box-shadow:var(--shadow)}
.tile img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.tile::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,27,42,.05) 30%,rgba(13,27,42,.85))}
.tile:hover img{transform:scale(1.07)}
.tile-body{position:relative;z-index:2;padding:22px}
.tile-body h3{font-size:1.08rem}
.tile-body span{font-size:.82rem;color:rgba(255,255,255,.75)}

/* dark band */
.band{background:var(--navy);color:#fff}
.band .section-head h2{color:#fff}
.band .section-head p{color:rgba(255,255,255,.66)}
.band .eyebrow{color:var(--gold)}
.band .eyebrow::before{background:var(--gold)}

/* equipment rows */
.eq-row{display:grid;grid-template-columns:1fr 1fr;gap:clamp(26px,4vw,56px);align-items:center;padding:clamp(22px,3vw,34px) 0;border-bottom:1px solid var(--line)}
.eq-row:last-child{border-bottom:0}
.eq-row:nth-child(even) .eq-img{order:2}
.eq-img img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;object-fit:cover;aspect-ratio:4/3}
.eq-tag{display:inline-block;background:var(--accent-soft);color:var(--accent-dark);font-size:.75rem;font-weight:700;padding:5px 12px;border-radius:100px;letter-spacing:.06em;margin-bottom:12px}
.eq-row h3{font-size:1.3rem;color:var(--navy)}
.eq-row .desc{margin-top:10px;color:var(--muted);font-size:.95rem}
.spec-table{margin-top:20px;display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.spec-table div{background:#fff;padding:12px 16px}
.spec-table .k{font-size:.74rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.spec-table .v{font-weight:700;color:var(--navy);font-size:.95rem;margin-top:2px}

/* advantages */
.adv{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.adv-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;position:relative;transition:.3s}
.adv-item:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.adv-num{font-size:2.6rem;font-weight:800;color:var(--accent-soft);-webkit-text-stroke:1.5px var(--accent);line-height:1;font-family:Georgia,serif}
.adv-item h3{margin-top:14px;font-size:1.08rem;color:var(--navy)}
.adv-item p{margin-top:10px;color:var(--muted);font-size:.9rem}

/* industries */
.ind-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ind-card{position:relative;border-radius:var(--radius);overflow:hidden;min-height:280px;display:flex;color:#fff}
.ind-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.ind-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,27,42,.15),rgba(13,27,42,.88))}
.ind-card:hover img{transform:scale(1.06)}
.ind-body{position:relative;z-index:2;padding:26px;margin-top:auto}
.ind-body h3{font-size:1.15rem}
.ind-body p{margin-top:8px;font-size:.88rem;color:rgba(255,255,255,.8);display:none}
.ind-card:hover .ind-body p{display:block}

/* logos */
.logo-wall{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.logo-cell{background:#fff;border:1px solid var(--line);border-radius:12px;height:96px;display:flex;align-items:center;justify-content:center;padding:20px;transition:.3s}
.logo-cell img{max-height:52px;max-width:100%;object-fit:contain;filter:grayscale(1);opacity:.62;transition:.3s}
.logo-cell:hover img{filter:grayscale(0);opacity:1}
.supplier-wall{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
/* 浅色卡片：深色底上用纯白卡片承载供应商 LOGO，保证清晰可辨 */
.supplier-wall .logo-cell{background:#fff;border-color:rgba(255,255,255,.9);box-shadow:0 6px 20px rgba(0,0,0,.25)}
.supplier-wall .logo-cell img{filter:none;opacity:1}
.supplier-wall .logo-cell:hover img{transform:scale(1.05)}

/* certifications — 滚动跑马灯 */
.cert-marquee{overflow:hidden;position:relative;-webkit-mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent);mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent)}
.cert-track{display:flex;gap:20px;width:max-content;animation:cert-scroll 40s linear infinite}
.cert-marquee:hover .cert-track{animation-play-state:paused}
@keyframes cert-scroll{from{transform:translateX(0)}to{transform:translateX(calc(-50% - 10px))}}
.cert{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center;transition:.3s;width:250px;flex:none}
.cert:hover{box-shadow:var(--shadow-lg)}
.cert .frame{height:190px;display:flex;align-items:center;justify-content:center;overflow:hidden;border-radius:8px;background:#f2f4f7}
.cert .frame img{max-height:100%;object-fit:contain}
.cert p{margin-top:12px;font-size:.82rem;font-weight:600;color:var(--steel);line-height:1.45}
@media (prefers-reduced-motion:reduce){.cert-track{animation:none;flex-wrap:wrap;width:auto;justify-content:center}}

/* timeline */
.timeline{position:relative;max-width:900px;margin:0 auto;padding-left:30px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--accent),var(--line))}
.tl-item{position:relative;padding:0 0 34px 26px}
.tl-item::before{content:"";position:absolute;left:-30px;top:6px;width:18px;height:18px;border-radius:50%;background:#fff;border:4px solid var(--accent)}
.tl-item .year{font-weight:800;color:var(--accent);font-size:1.15rem;font-family:Georgia,serif}
.tl-item h4{color:var(--navy);margin-top:4px;font-size:1.02rem}
.tl-item p{color:var(--muted);font-size:.92rem;margin-top:4px}

/* group companies */
.group-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.3s}
.group-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.group-card .flag{font-size:.72rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}
.group-card h3{margin-top:10px;font-size:1.1rem;color:var(--navy)}
.group-card p{margin-top:10px;color:var(--muted);font-size:.9rem}

/* CTA band */
.cta-band{background:linear-gradient(115deg,var(--navy) 55%,var(--steel));border-radius:20px;color:#fff;padding:clamp(30px,4.5vw,52px);display:grid;grid-template-columns:1fr auto;align-items:center;gap:18px 46px;position:relative;overflow:hidden}
.section.cta-sec{padding-top:clamp(18px,3vw,36px);padding-bottom:clamp(34px,5vw,60px)}
.cta-band::before{content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;border-radius:50%;background:rgba(242,117,31,.16)}
.cta-band h2{font-size:clamp(1.5rem,2.8vw,2.1rem)}
.cta-band p{margin-top:10px;color:rgba(255,255,255,.72)}
.cta-band .btn{white-space:nowrap;justify-self:center}

/* contact page */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:.3s;display:flex;flex-direction:column}
.contact-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:transparent}
.contact-card .hq{align-self:flex-start;background:var(--accent);color:#fff;font-size:.68rem;font-weight:700;letter-spacing:.12em;padding:4px 12px;border-radius:100px;text-transform:uppercase}
.contact-card h3{margin-top:14px;font-size:1.2rem;color:var(--navy)}
.contact-card .region{color:var(--accent-dark);font-weight:600;font-size:.88rem;margin-top:2px}
.contact-card .hq-ghost{visibility:hidden}
.contact-list{margin-top:18px;margin-bottom:20px;display:grid;gap:12px;font-size:.92rem;color:var(--muted)}
.contact-list li{display:flex;gap:10px;align-items:flex-start}
.contact-list b{color:var(--navy);font-weight:600}
.contact-list svg{width:17px;height:17px;flex:none;margin-top:4px;color:var(--accent)}
/* 按钮区固定贴卡片底部：margin-top:auto 吸收剩余高度，三张卡片按钮水平对齐 */
.contact-actions{margin-top:auto;padding-top:20px;border-top:1px solid var(--line);display:flex;gap:10px;flex-wrap:wrap}
.contact-actions .btn{flex:1 1 120px;justify-content:center;min-width:0}
.btn-sm{padding:10px 18px;font-size:.85rem;border-radius:8px}
.contact-form-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(30px,5vw,60px);align-items:start}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(24px,3.5vw,40px);box-shadow:var(--shadow)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{display:block;font-size:.83rem;font-weight:600;color:var(--navy);margin-bottom:7px}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:9px;font-family:var(--font);font-size:.93rem;color:var(--text);background:var(--bg);transition:.2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent);background:#fff}
.field textarea{min-height:130px;resize:vertical}
/* home video block */
.video-wrap{max-width:960px;margin:0 auto;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-lg);background:#000}
.video-wrap video{display:block;width:100%;aspect-ratio:16/9}
/* 全屏态：解除容器裁切与宽高比限制，铺满并保持比例 */
.video-wrap:fullscreen{max-width:none;border-radius:0;box-shadow:none;overflow:visible}
.video-wrap:fullscreen video{width:100%;height:100%;aspect-ratio:auto;object-fit:contain}
video:fullscreen{width:100vw!important;height:100vh!important;aspect-ratio:auto;object-fit:contain;background:#000}
video:-webkit-full-screen{width:100vw!important;height:100vh!important;aspect-ratio:auto;object-fit:contain;background:#000}
/* 旧浏览器回退：不支持 aspect-ratio 时用 padding-top 撑起比例（iOS 14- / 老安卓 WebView） */
@supports not (aspect-ratio: 1/1) {
  .card-img{padding-top:62.5%}
  .card-img img{position:absolute;top:0;left:0;height:100%}
  .video-wrap{position:relative;padding-top:56.25%}
  .video-wrap video{position:absolute;top:0;left:0;height:100%}
}

.form-note{font-size:.8rem;color:var(--muted);margin-top:12px}
/* 表单提交状态 */
.form-status{font-size:.85rem;margin-top:10px;min-height:0;display:none}
.form-status.ok{display:block;color:#1c8a4c;font-weight:600}
.form-status.err{display:block;color:#c0392b;font-weight:600}
/* 微信弹窗 */
.wechat-mask{position:fixed;inset:0;background:rgba(10,20,35,.55);z-index:2000;display:none;align-items:center;justify-content:center;padding:20px}
.wechat-mask.open{display:flex}
.wechat-modal{background:#fff;border-radius:16px;padding:34px 38px;max-width:340px;width:100%;text-align:center;box-shadow:var(--shadow-lg)}
.wechat-modal .wechat-logo{width:58px;height:58px;margin:0 auto 12px;border-radius:50%;background:#1aad19;color:#fff;display:flex;align-items:center;justify-content:center}
.wechat-modal .wechat-logo svg{width:32px;height:32px}
.wechat-modal h3{color:var(--navy);font-size:1.15rem}
.wechat-modal .wechat-hint{font-size:.83rem;color:var(--muted);margin-top:8px;line-height:1.6}
.wechat-modal .wechat-id{display:flex;align-items:center;justify-content:center;gap:10px;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin-top:14px;font-weight:800;font-size:1.2rem;color:var(--navy);letter-spacing:.02em}
.wechat-modal .wechat-id button{border:0;background:var(--accent);color:#fff;font-size:.78rem;font-weight:700;padding:6px 12px;border-radius:7px;cursor:pointer;font-family:var(--font)}
.wechat-modal .wechat-id button:hover{background:var(--accent-dark)}
.wechat-modal .wechat-person{font-size:.8rem;color:var(--muted);margin:10px 0 18px}

/* page hero (subpages) */
.page-hero{background:var(--navy);color:#fff;padding:150px 0 56px;position:relative;overflow:hidden}
.page-hero .bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.28}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(9,20,33,.9),rgba(9,20,33,.45))}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;gap:8px;font-size:.82rem;color:rgba(255,255,255,.6);margin-bottom:16px}
.breadcrumb a:hover{color:var(--gold)}
.page-hero h1{font-size:clamp(1.9rem,3.6vw,2.8rem);font-weight:800}
.page-hero p{margin-top:14px;max-width:640px;color:rgba(255,255,255,.75)}

/* footer */
.site-footer{background:var(--navy);color:rgba(255,255,255,.72);margin-top:0}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:clamp(26px,4vw,50px);padding:clamp(36px,5vw,56px) 0 34px}
.site-footer h4{color:#fff;font-size:.95rem;margin-bottom:18px;letter-spacing:.04em}
.site-footer .brand{color:#fff;margin-bottom:16px}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:.9rem;transition:.2s}
.footer-links a:hover{color:var(--gold);padding-left:4px}
.footer-contact li{display:flex;gap:10px;margin-bottom:12px;font-size:.88rem;align-items:flex-start}
.footer-contact svg{width:16px;height:16px;flex:none;margin-top:4px;color:var(--gold)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:.8rem;color:rgba(255,255,255,.45)}
.footer-bottom a:hover{color:var(--gold)}

/* reveal animation */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
.d1{transition-delay:.08s}.d2{transition-delay:.16s}.d3{transition-delay:.24s}.d4{transition-delay:.32s}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .adv{grid-template-columns:repeat(2,1fr)}
  .logo-wall,.supplier-wall{grid-template-columns:repeat(4,1fr)}
  .cert-grid{grid-template-columns:repeat(3,1fr)}
  .footer-top{grid-template-columns:1fr 1fr}
  .main-nav{display:none}
  .burger{display:flex}
}
@media (max-width:860px){
  .split,.eq-row,.contact-form-wrap{grid-template-columns:1fr}
  .eq-row:nth-child(even) .eq-img{order:0}
  .grid-3,.ind-grid,.contact-grid{grid-template-columns:repeat(2,1fr)}
  .hero-stats .container{grid-template-columns:repeat(2,1fr);gap:18px 0}
  .split-img .badge{right:10px}
}
@media (max-width:600px){
  body{font-size:15px}
  .grid-3,.grid-4,.grid-2,.ind-grid,.contact-grid,.adv,.logo-wall,.supplier-wall{grid-template-columns:1fr 1fr}
  .logo-cell{height:74px;padding:12px}
  .logo-cell img{max-height:38px}
  .hero{min-height:88vh}
  .hero .container{padding:120px 0 60px}
  .spec-table{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
  .cta-band{padding:34px 26px;grid-template-columns:1fr;gap:16px}
  .cta-band .btn{justify-self:start}
  .section.cta-sec{padding-bottom:40px}
  .tile{min-height:180px}
  .ind-card{min-height:210px}
  .hero-cta .btn{width:100%;justify-content:center}
  .brand-header{gap:3px}
  .brand-row img{width:32px!important;height:32px!important}
  .brand-header .brand-name{font-size:.95rem;letter-spacing:.04em}
  .brand-header .brand-sub{font-size:.55rem;letter-spacing:.08em}
}
@media (max-width:420px){
  .grid-3,.grid-4,.logo-wall,.supplier-wall{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
}

/* products: note under card image + intro after grid */
.img-note{font-size:.86rem;color:var(--muted);line-height:1.6;margin-top:8px}
.grid-note{max-width:860px;margin:30px auto 0;text-align:center;color:var(--muted);font-size:.95rem;line-height:1.8}

/* ---- 素材防下载：禁长按存储(iOS)、禁拖拽、禁选中图片 ---- */
img, video {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-user-drag: none;
}