/* ============ WIST Machinery — 共享样式 ============ */
:root{
  --ink:#14171C;
  --ink-2:#1C2129;
  --ink-3:#2A3039;
  --red:#C8102E;
  --red-dark:#A40D26;
  --steel:#33445C;
  --paper:#F4F5F7;
  --line:#E1E4E9;
  --white:#FFFFFF;
  --muted:#5C6773;
  --ok:#2E7D4F;
  --shadow:0 10px 30px rgba(20,23,28,.08);
  --radius:6px;
  --container:1200px;
  --font:'Archivo','Segoe UI','Helvetica Neue',Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:var(--font);color:var(--ink);background:var(--white);line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased;}
img{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;}

h1,h2,h3,h4{line-height:1.18;font-weight:800;letter-spacing:-.01em;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--red);}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--red);}
.eyebrow.light{color:#E9A8B0;}
.section{padding:84px 0;}
.section-head{margin-bottom:44px;max-width:660px;}
.section-head h2{font-size:clamp(26px,3.4vw,38px);margin:12px 0 14px;}
.section-head p{color:var(--muted);font-size:17px;}
.lead{font-size:18px;color:var(--muted);}

.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 26px;border-radius:var(--radius);font-weight:700;font-size:15px;border:1px solid transparent;transition:background .18s ease,color .18s ease,border-color .18s ease,transform .12s ease;}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--red);color:#fff;}
.btn-primary:hover{background:var(--red-dark);}
.btn-dark{background:var(--ink);color:#fff;}
.btn-dark:hover{background:var(--ink-3);}
.btn-ghost{border-color:rgba(255,255,255,.55);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;}
.btn-line{border-color:var(--ink);color:var(--ink);}
.btn-line:hover{background:var(--ink);color:#fff;}
.btn svg{flex:none;}

/* header */
.nav-top{display:flex;align-items:center;gap:26px;padding:14px 0 12px;}
.nav-contact{display:flex;align-items:center;gap:16px;margin-inline-start:6px;padding-inline-start:20px;border-inline-start:1px solid var(--line);}
.nc-item{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;font-weight:600;color:var(--ink-3);text-decoration:none;transition:color .15s ease;white-space:nowrap;}
.nc-item:hover{color:var(--red);}
.nc-item svg{color:var(--red);flex:none;}
.nav-search{margin-left:auto;display:flex;align-items:center;border:1px solid var(--line);border-radius:99px;padding:3px 4px 3px 16px;background:var(--paper);transition:border-color .15s ease,box-shadow .15s ease;}
.nav-search:focus-within{border-color:var(--red);box-shadow:0 0 0 3px rgba(200,16,46,.1);background:#fff;}
.nav-search input{border:none;background:none;outline:none;font-size:14px;width:200px;color:var(--ink);font-family:inherit;}
.nav-search input::placeholder{color:var(--muted);}
.nav-search button{width:34px;height:34px;border-radius:50%;background:var(--red);color:#fff;display:flex;align-items:center;justify-content:center;flex:none;transition:background .18s ease;}
.nav-search button:hover{background:var(--red-dark);}
.nav-main{display:flex;align-items:stretch;gap:6px;border-top:1px solid var(--line);padding:7px 0;}
.nav-main .nav-links{flex:1;display:flex;gap:6px;}
.nav-main .nav-links > a{flex:1;text-align:center;background:var(--red);color:#fff;padding:6px 4px;border-radius:3px;font-weight:600;font-size:13px;line-height:1.3;transition:background .15s ease;}
.nav-main .nav-links > a:hover{background:var(--red-dark);}
.nav-main .lang-switch{margin-left:0;}
.nav-main .lang-switch .lang-btn{background:var(--red);color:#fff;border-color:var(--red);font-size:13px;line-height:1.3;padding:6px 10px;}
.nav-main .lang-switch .lang-btn:hover{background:var(--red-dark);}
@media(max-width:1240px){.nav-contact{gap:10px;padding-inline-start:16px;}.nc-item span{display:none;}.nav-search input{width:150px;}}
@media(max-width:960px){.nav-contact{display:none;}.nav-top{gap:14px;padding:10px 0;}.nav-search{margin-left:auto;}.nav-search input{width:110px;}.nav-main{border-top:none;padding:0;}}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);transition:box-shadow .2s ease;}
.site-header.scrolled{box-shadow:0 4px 18px rgba(20,23,28,.08);}
.nav{display:flex;align-items:center;gap:28px;height:74px;}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:19px;letter-spacing:-.01em;}
.brand small{display:block;font-size:10.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{padding:9px 14px;border-radius:var(--radius);font-weight:600;font-size:15px;color:var(--ink-3);transition:background .15s ease,color .15s ease;}
.nav-links a:hover{background:var(--paper);color:var(--ink);}
.nav-links a.active{color:var(--red);background:#FBEDEF;}
.nav-cta{margin-left:10px;}
.nav-burger{display:none;margin-left:auto;width:42px;height:42px;align-items:center;justify-content:center;border-radius:6px;}
.nav-burger:hover{background:var(--paper);}
/* language switch */
.lang-switch{position:relative;display:inline-flex;margin-left:2px;}
.lang-btn{display:inline-flex;align-items:center;gap:6px;padding:9px 12px;border-radius:var(--radius);font-weight:600;font-size:14px;color:var(--ink-3);background:transparent;cursor:pointer;transition:background .15s ease,color .15s ease;}
.lang-btn:hover{background:var(--paper);color:var(--ink);}
.lang-menu{display:none;position:absolute;top:calc(100% + 6px);inset-inline-end:0;min-width:176px;background:var(--white);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow);padding:6px;z-index:120;list-style:none;margin:0;}
.lang-switch:hover .lang-menu,.lang-switch:focus-within .lang-menu{display:block;}
.lang-menu a{display:block;padding:9px 12px;border-radius:6px;font-size:14px;font-weight:600;color:var(--ink-3);text-decoration:none;white-space:nowrap;}
.lang-menu a:hover{background:var(--paper);color:var(--ink);}
.lang-menu a.cur{color:var(--red);background:#FBEDEF;}
@media(max-width:960px){
  .lang-switch{width:100%;margin:8px 0 0;display:block;}
  .lang-btn{width:100%;justify-content:flex-start;padding:13px 14px;font-size:17px;}
  .lang-menu{position:static;display:block;box-shadow:none;border:none;border-left:1px solid var(--line);border-radius:0;padding:4px 0 2px 14px;margin:2px 0 0 14px;min-width:0;background:transparent;}
  .lang-menu a{font-size:15px;white-space:normal;}
}
@media(max-width:960px){
  .nav-links{position:fixed;inset:0;top:0;padding-top:84px;flex-direction:column;align-items:flex-start;gap:4px;background:var(--white);padding:84px 24px 32px;transform:translateX(100%);transition:transform .22s ease;box-shadow:-8px 0 30px rgba(20,23,28,.1);z-index:99;overflow:auto;}
  .nav-links.open{transform:translateX(0);}
  .nav-main .nav-links > a{width:100%;padding:13px 14px;font-size:17px;background:none;color:var(--ink);border-radius:0;text-align:left;}
  .nav-burger{display:flex;margin-left:auto;}
}

/* hero */
.hero{position:relative;color:#fff;background:linear-gradient(115deg,#1C2129 0%,#14171C 100%);overflow:hidden;}
.hero-inner{position:relative;z-index:2;padding:96px 0 104px;display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;}
.hero h1{font-size:clamp(32px,4.6vw,52px);margin:18px 0 20px;}
.hero .lead{color:#C9D2DC;font-size:clamp(16px,1.55vw,19px);max-width:560px;}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap;}
.hero-badges{display:flex;gap:10px;margin-top:28px;flex-wrap:wrap;}
.hero-badges span{font-size:12.5px;font-weight:600;letter-spacing:.04em;padding:7px 13px;border:1px solid rgba(255,255,255,.35);border-radius:99px;color:#E9EEF3;}
.hero-visual{position:relative;z-index:2;border-radius:10px;background:#fff;padding:20px;box-shadow:0 30px 70px rgba(0,0,0,.45);}
.hero-visual img{width:100%;height:auto;object-fit:contain;display:block;}
.hero-link{display:block;position:relative;overflow:hidden;border-radius:6px;text-decoration:none;}
.hero-link img{transition:transform .45s ease;}
.hero-link:hover img{transform:scale(1.045);}
.hero-link:focus-visible{outline:3px solid var(--red);outline-offset:3px;}
.hero-cta{position:absolute;right:16px;bottom:16px;background:var(--red);color:#fff;padding:10px 18px;border-radius:8px;font-weight:700;font-size:14.5px;letter-spacing:.02em;box-shadow:0 6px 18px rgba(0,0,0,.28);transition:background .2s ease;}
.hero-link:hover .hero-cta{background:var(--red-dark);}
.hero-visual figcaption{font-size:12.5px;color:var(--muted);text-align:center;padding-top:12px;font-weight:600;letter-spacing:.03em;}
@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr;padding:64px 0 72px;}
  .hero-visual{order:-1;}
}

/* stats */
.stats{position:relative;z-index:3;margin-top:-38px;background:var(--white);border-radius:8px;box-shadow:var(--shadow);display:grid;grid-template-columns:repeat(4,1fr);}
.stat{padding:30px 26px;text-align:center;border-right:1px solid var(--line);}
.stat:last-child{border-right:none;}
.stat b{display:block;font-size:34px;font-weight:800;color:var(--red);letter-spacing:-.02em;}
.stat span{font-size:13.5px;color:var(--muted);font-weight:600;letter-spacing:.03em;text-transform:uppercase;}
@media(max-width:820px){
  .stats{grid-template-columns:repeat(2,1fr);margin-top:-30px;}
  .stat{border-bottom:1px solid var(--line);}
  .stat:nth-child(2n){border-right:none;}
  .stat:nth-child(n+3){border-bottom:none;}
}

/* category grid */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.cat-card{display:block;border:1px solid var(--line);border-radius:8px;padding:24px 20px;background:var(--white);transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;}
.cat-card:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:#C9D3DE;}
.cat-card .ico{width:46px;height:46px;border-radius:8px;background:#FBEDEF;color:var(--red);display:flex;align-items:center;justify-content:center;margin-bottom:14px;}
.cat-card h3{font-size:16.5px;margin-bottom:5px;}
.cat-card p{color:var(--muted);font-size:13.5px;}
.cat-card .n{display:inline-block;margin-top:12px;font-size:12.5px;font-weight:700;color:var(--red);letter-spacing:.04em;}
@media(max-width:1080px){.cat-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:520px){.cat-grid{grid-template-columns:1fr;}}

/* product cards */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.prod-card{position:relative;display:flex;flex-direction:column;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--white);transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;}
.prod-card:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:#C9D3DE;}
.prod-card .thumb{aspect-ratio:4/3;background:#fff;display:flex;align-items:center;justify-content:center;padding:14px;}
.prod-card .thumb img{width:100%;height:100%;object-fit:contain;}
.prod-card .cat-tag{display:none;}
.prod-card .body{padding:18px 20px 20px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:8px;flex:1;}
.prod-card h3{font-size:17px;}
.prod-card .model{color:var(--red);font-weight:700;font-size:13px;letter-spacing:.05em;}
.prod-card p{color:var(--muted);font-size:14px;line-height:1.55;}
.prod-card .more{margin-top:auto;padding-top:12px;color:var(--red);font-weight:700;font-size:14px;display:inline-flex;align-items:center;gap:6px;}
@media(max-width:1080px){.prod-grid{grid-template-columns:repeat(3,1fr);}}
@media(max-width:820px){.prod-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:520px){.prod-grid{grid-template-columns:1fr;}}

/* features */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.feature{border:1px solid var(--line);border-radius:8px;padding:26px 22px;background:var(--white);transition:box-shadow .2s ease,border-color .2s ease;}
.feature:hover{box-shadow:var(--shadow);border-color:#C9D3DE;}
.feature .ico{width:48px;height:48px;border-radius:8px;background:#FBEDEF;color:var(--red);display:flex;align-items:center;justify-content:center;margin-bottom:16px;}
.feature h3{font-size:17px;margin-bottom:8px;}
.feature p{color:var(--muted);font-size:14.5px;}
@media(max-width:1080px){.feature-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:520px){.feature-grid{grid-template-columns:1fr;}}

/* applications */
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:8px;overflow:hidden;}
.app-item{background:var(--white);padding:26px 24px;display:flex;gap:16px;align-items:flex-start;}
.app-item .ico{flex:none;color:var(--red);}
.app-item h3{font-size:16px;margin-bottom:5px;}
.app-item p{color:var(--muted);font-size:14px;}
@media(max-width:820px){.app-grid{grid-template-columns:1fr;}}

/* dark / timeline */
.dark{background:var(--ink);color:#fff;}
.dark .section-head p{color:#AAB4C0;}
.dark .lead{color:#AAB4C0;}
.timeline{display:grid;grid-template-columns:auto 1px 1fr;gap:0;max-width:820px;}
.tl-node{grid-column:1;display:flex;justify-content:center;padding:0 22px 0 0;}
.tl-dot{width:14px;height:14px;border-radius:50%;background:var(--red);border:3px solid var(--ink-2);margin-top:6px;justify-self:center;}
.tl-line{grid-column:2;width:1px;background:rgba(255,255,255,.22);}
.tl-body{grid-column:3;padding:0 0 34px 26px;}
.tl-body h3{font-size:17px;margin-bottom:4px;}
.tl-body p{color:#AAB4C0;font-size:14.5px;}

/* testimonials */
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.testi{border:1px solid var(--line);border-radius:8px;padding:26px 24px;background:var(--white);}
.testi .quote{font-size:15px;color:var(--ink-3);line-height:1.65;margin-bottom:18px;}
.testi .who{display:flex;align-items:center;gap:12px;}
.testi .avatar{width:42px;height:42px;border-radius:50%;flex:none;background:var(--red);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;}
.testi .who b{display:block;font-size:14.5px;}
.testi .who span{font-size:13px;color:var(--muted);}
@media(max-width:820px){.testi-grid{grid-template-columns:1fr;}}

/* CTA band */
.cta-band{background:linear-gradient(115deg,var(--red-dark),var(--red));color:#fff;border-radius:10px;padding:52px 48px;display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;}
.cta-band h2{font-size:clamp(24px,3vw,34px);margin-bottom:10px;}
.cta-band p{color:#F6CDD3;max-width:520px;}

/* page hero */
.page-hero{background:var(--ink-2);color:#fff;padding:56px 0 58px;}
.page-hero h1{font-size:clamp(28px,3.6vw,42px);margin:10px 0 10px;}
.page-hero p{color:#B9C3CE;max-width:680px;}
.page-hero .eyebrow{color:#E9A8B0;}

/* breadcrumb */
.crumbs{font-size:13.5px;color:var(--muted);padding:20px 0 0;}
.crumbs a{color:var(--steel);font-weight:600;}
.crumbs a:hover{color:var(--red);}
.crumbs span{margin:0 8px;color:#A9B2BC;}

/* product detail */
.pd-wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;padding:44px 0 20px;}
.pd-img{border:1px solid var(--line);border-radius:10px;background:#fff;padding:22px;display:flex;align-items:center;justify-content:center;align-self:start;position:sticky;top:98px;}
.pd-img img{width:100%;height:auto;object-fit:contain;}
.pd-info h1{font-size:clamp(26px,3vw,36px);margin:8px 0 6px;}
.pd-model{color:var(--red);font-weight:700;font-size:15px;letter-spacing:.06em;}
.pd-info .desc{color:var(--muted);margin:16px 0 24px;font-size:16px;}
.spec-table{width:100%;border-collapse:collapse;margin-bottom:26px;table-layout:fixed;}
.spec-table th,.spec-table td{padding:11px 14px;border:1px solid var(--line);font-size:14.5px;text-align:left;}
.spec-table th{width:44%;background:var(--paper);color:var(--ink-3);font-weight:700;}
.spec-table td{font-weight:500;}
.pd-meta{display:flex;gap:18px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:20px;color:var(--muted);font-size:14px;}
.pd-meta b{color:var(--ink);}
@media(max-width:900px){
  .pd-wrap{grid-template-columns:1fr;gap:26px;}
  .pd-img{position:static;}
}

/* filters */
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:32px;}
.filter-btn{padding:9px 18px;border-radius:99px;font-weight:600;font-size:14px;border:1px solid var(--line);color:var(--ink-3);transition:all .15s ease;}
.filter-btn:hover{border-color:var(--red);color:var(--red);}
.filter-btn.active{background:var(--ink);border-color:var(--ink);color:#fff;}
.cat-section{margin-bottom:64px;scroll-margin-top:96px;}
.cat-section > h2{font-size:clamp(22px,2.6vw,30px);margin:8px 0 4px;display:flex;align-items:center;gap:12px;}
.cat-section > h2 .cnt{font-size:13px;font-weight:700;color:var(--red);background:#FBEDEF;border-radius:99px;padding:3px 12px;}
.cat-section > p{color:var(--muted);margin-bottom:24px;max-width:760px;}

/* about */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;}
.about-grid h2{font-size:clamp(24px,3vw,34px);margin:12px 0 16px;}
.about-grid p{color:var(--muted);margin-bottom:14px;}
.cert-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:22px;}
.cert{border:1px solid var(--line);border-radius:8px;padding:14px 18px;background:var(--white);display:flex;align-items:center;gap:10px;font-weight:700;font-size:14px;}
.cert svg{color:var(--red);}
@media(max-width:900px){.about-grid{grid-template-columns:1fr;gap:30px;}}

/* FAQ */
.faq-list{max-width:820px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 4px;text-align:left;font-size:16.5px;font-weight:700;color:var(--ink);}
.faq-q .arrow{flex:none;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;transition:transform .2s ease,background .2s ease,color .2s ease;color:var(--red);}
.faq-item.open .faq-q .arrow{transform:rotate(180deg);background:var(--red);border-color:var(--red);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;}
.faq-a p{padding:0 30px 20px 4px;color:var(--muted);}

/* contact */
.contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;}
.contact-form{border:1px solid var(--line);border-radius:10px;padding:34px 32px;background:var(--white);}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13.5px;font-weight:700;margin-bottom:7px;color:var(--ink-3);}
.field label i{color:var(--red);font-style:normal;}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:6px;font-family:inherit;font-size:15px;color:var(--ink);background:var(--white);transition:border-color .15s ease,box-shadow .15s ease;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--red);box-shadow:0 0 0 3px rgba(200,16,46,.12);}
.field textarea{resize:vertical;min-height:120px;}
.contact-side .card{border:1px solid var(--line);border-radius:10px;padding:28px 26px;margin-bottom:20px;background:var(--white);}
.contact-side h3{font-size:16px;margin-bottom:14px;display:flex;align-items:center;gap:10px;color:var(--ink);}
.contact-side h3 svg{color:var(--red);}
.contact-side li{display:flex;gap:12px;padding:9px 0;font-size:15px;color:var(--ink-3);border-bottom:1px dashed var(--line);}
.contact-side li:last-child{border-bottom:none;}
.contact-side li b{color:var(--ink);font-weight:700;min-width:96px;}
.note{font-size:12.5px;color:var(--muted);margin-top:10px;line-height:1.5;}
@media(max-width:900px){
  .contact-grid{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
}

/* footer */
.site-footer{background:var(--ink);color:#B9C3CE;padding:64px 0 34px;margin-top:40px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.12);}
.footer-grid h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.02em;}
.footer-grid a,.footer-grid li{display:block;padding:6px 0;font-size:14.5px;color:#B9C3CE;transition:color .15s ease;}
.footer-grid a:hover{color:#fff;}
.brand-foot{display:flex;align-items:center;gap:11px;font-weight:800;font-size:19px;color:#fff;margin-bottom:14px;}.footer-social{display:flex;justify-content:center;gap:14px;padding:22px 0 4px;flex-wrap:wrap;}
.footer-social a{width:42px;height:42px;border-radius:50%;background:#262a30;display:inline-flex;align-items:center;justify-content:center;color:#c9cdd3;text-decoration:none;transition:background .2s ease,color .2s ease,transform .2s ease;}
.footer-social a:hover{background:var(--red);color:#fff;transform:translateY(-3px);}
.footer-social a:focus-visible{outline:2px solid var(--red);outline-offset:2px;}

.footer-copy{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;padding-top:26px;font-size:13.5px;color:#8A95A1;}
@media(max-width:820px){.footer-grid{grid-template-columns:1fr 1fr;}}

/* toast */
#toast{position:fixed;left:50%;bottom:34px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:14px 22px;border-radius:8px;font-size:14.5px;font-weight:600;box-shadow:0 12px 34px rgba(20,23,28,.28);opacity:0;pointer-events:none;transition:opacity .22s ease,transform .22s ease;z-index:300;max-width:90vw;text-align:center;}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0);}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
}

/* orphan fix: skip the 4-column tier when the card count leaves one card alone */
@media(min-width:1081px){
  .prod-grid:has(> :nth-child(9):last-child),
  .prod-grid:has(> :nth-child(13):last-child){grid-template-columns:repeat(3,1fr);}
  .prod-grid:has(> :nth-child(9):last-child):not(:has(> :nth-child(13):last-child)){grid-template-columns:repeat(3,1fr);}
}


/* ============ blog ============ */
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.blog-card{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--white);transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;}
.blog-card:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:#C9D3DE;}
.blog-card .thumb{aspect-ratio:16/10;background:var(--paper);overflow:hidden;}
.blog-card .thumb img{width:100%;height:100%;object-fit:cover;}
.blog-card .body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:8px;flex:1;}
.blog-card h3{font-size:17px;line-height:1.35;}
.blog-card p{color:var(--muted);font-size:14px;line-height:1.55;}
.blog-card .more{margin-top:auto;padding-top:12px;color:var(--red);font-weight:700;font-size:14px;display:inline-flex;align-items:center;gap:6px;}
.blog-cat{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--red);}
.blog-post{max-width:860px;padding-top:44px;padding-bottom:40px;}
.blog-post > .blog-cat{margin-bottom:12px;}
.blog-post h1{font-size:clamp(28px,3.6vw,40px);margin:10px 0 16px;line-height:1.2;}
.blog-desc{font-size:18px;color:var(--ink-3);border-left:3px solid var(--red);padding-left:18px;margin-bottom:34px;}
.blog-body h2{font-size:clamp(21px,2.6vw,27px);margin:38px 0 14px;}
.blog-body h3{font-size:18px;margin:26px 0 10px;}
.blog-body p{color:var(--muted);font-size:16px;line-height:1.75;margin-bottom:16px;}
.blog-body p:last-child{margin-bottom:0;}
@media(max-width:1080px){.blog-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:820px){.blog-grid{grid-template-columns:1fr;}}

/* ===== 品牌 LOGO（附件版）===== */
.brand img{height:40px;width:auto;display:block;}
.brand-foot img{height:56px;width:auto;display:block;}
.brand-foot{margin-bottom:14px;}

/* ===== FAQ 完整问答 ===== */
.faq-item{position:relative;}
.faq-item.open .faq-a{max-height:600px;}
.faq-toc{max-width:820px;margin:0 auto 26px;padding:20px 24px;background:#f7f6f2;border:1px solid var(--line);border-radius:14px;}
.faq-toc h2{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:12px;}
.faq-toc ul{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:7px 26px;}
.faq-toc a{color:var(--ink);font-size:14.5px;text-decoration:none;border-bottom:1px dotted transparent;transition:border-color .15s ease,color .15s ease;}
.faq-toc a:hover{color:var(--red);border-color:var(--red);}

/* ===== 分类锚点滚动补偿（fixed header 遮挡） ===== */
.cat-section{scroll-margin-top:92px;}
@media(max-width:640px){.faq-toc ul{grid-template-columns:1fr;}}

/* ===== LOGO 放大 + 更靠左 ===== */
.brand img{height:48px;width:auto;display:block;}
.brand{margin-inline-start:-14px;}
@media(max-width:960px){.brand img{height:44px;}}

/* ===== 底栏美化：紧凑精致 + 列对齐 + 联系图标 ===== */
.footer-grid{gap:40px;align-items:start;}
.footer-grid h4{position:relative;font-size:14px;letter-spacing:.05em;text-transform:uppercase;padding-bottom:9px;margin-bottom:15px;}
.footer-grid h4::after{content:"";position:absolute;left:0;bottom:0;width:26px;height:2px;background:var(--red);}
.footer-grid ul li{display:flex;align-items:flex-start;gap:9px;line-height:1.5;padding:5px 0;font-size:14px;}
.footer-grid ul li a{display:inline;}
.footer-brand-intro{max-width:270px;font-size:13.5px;line-height:1.65;color:#B9C3CE;}
.brand-foot img{width:122px;height:auto;}
/* Contact Us 列图标 */
.footer-grid > div:nth-child(4) ul li::before{content:"";flex:none;width:15px;height:15px;margin-top:3px;background:var(--red);-webkit-mask:var(--ic) center/contain no-repeat;mask:var(--ic) center/contain no-repeat;}
.footer-grid > div:nth-child(4) ul li:nth-child(1){--ic:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 10c0 6-8 12-8 12s-8-6-8-12a8 8 0 0 1 16 0z'/%3E%3Ccircle cx='12' cy='10' r='3'/%3E%3C/svg%3E");}
.footer-grid > div:nth-child(4) ul li:nth-child(2){--ic:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round'%3E%3Crect x='2' y='4' width='20' height='16' rx='2'/%3E%3Cpath d='m22 7-10 6L2 7'/%3E%3C/svg%3E");}
.footer-grid > div:nth-child(4) ul li:nth-child(3){--ic:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M22 16.9v3a2 2 0 0 1-2.2 2 19.8 19.8 0 0 1-8.6-3.1 19.5 19.5 0 0 1-6-6A19.8 19.8 0 0 1 2.1 4.2 2 2 0 0 1 4.1 2h3a2 2 0 0 1 2 1.7c.13.96.36 1.9.7 2.8a2 2 0 0 1-.45 2.1L8.1 9.9a16 16 0 0 0 6 6l1.3-1.3a2 2 0 0 1 2.1-.45c.9.34 1.84.57 2.8.7A2 2 0 0 1 22 16.9z'/%3E%3C/svg%3E");}
.footer-grid > div:nth-child(4) ul li:nth-child(4){--ic:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z'/%3E%3C/svg%3E");}
.footer-social{margin-top:18px;padding:0 0 14px;gap:12px;}
.footer-social a{width:40px;height:40px;}
.footer-copy{border-top:1px solid rgba(255,255,255,.14);margin-top:20px;padding-top:20px;}
@media(max-width:820px){.footer-grid{gap:30px 28px;}}
@media(max-width:640px){.footer-grid{gap:28px;}}

/* Contact 列链接行与文本行同高 */
.footer-grid > div:nth-child(4) ul li a{display:inline;padding:0;}

/* ===== 产品红色型号隐藏，保留黑色标题 ===== */
.pd-model{display:none;}
.prod-card .model{display:none;}