/* Lọc Nước An An — lớp giao diện chung cho toàn website */
:root{
  --paper:#F7F9FC; --sheet:#FFFFFF; --ink:#0D1A2D; --muted:#56667D; --line:#D6DFEB;
  --brand:#02489B; --brand-ink:#02489B; --brand-deep:#012C61; --tint:#E3EDF9; --on-brand:#FFFFFF; --on-brand-muted:#B9CDEA;
  --f-display:"Barlow Condensed","Arial Narrow",Arial,sans-serif;
  --f-body:"Be Vietnam Pro",system-ui,"Segoe UI",Arial,sans-serif;
  --f-serif:"Playfair Display",Georgia,"Times New Roman",serif;
  --f-mono:"Roboto Mono",ui-monospace,Consolas,monospace;
  --wrap:1120px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#08111F; --sheet:#0F1B2E; --ink:#E5ECF6; --muted:#9AAAC0; --line:#22324A;
  --brand:#0A4FA6; --brand-ink:#7DB0F2; --brand-deep:#041E44; --tint:#12284A; --on-brand:#FFFFFF; --on-brand-muted:#A9C0E3; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#08111F; --sheet:#0F1B2E; --ink:#E5ECF6; --muted:#9AAAC0; --line:#22324A;
  --brand:#0A4FA6; --brand-ink:#7DB0F2; --brand-deep:#041E44; --tint:#12284A; --on-brand:#FFFFFF; --on-brand-muted:#A9C0E3; color-scheme:dark}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 var(--f-body);-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:60;background:var(--sheet)}
[hidden]{display:none!important}
img{display:block;max-width:100%}
.wrap{max-width:var(--wrap);margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
a{color:inherit}
p{margin:0}
:focus-visible{outline:3px solid var(--brand-ink);outline-offset:3px;border-radius:4px}
.dark-logo{display:none}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .light-logo{display:none}:root:not([data-theme="light"]) .dark-logo{display:block}}
:root[data-theme="dark"] .light-logo{display:none}:root[data-theme="dark"] .dark-logo{display:block}

/* Thanh tiện ích */
.util{background:var(--brand-deep);color:var(--on-brand-muted);font-size:.8rem}
.util .wrap{display:flex;justify-content:space-between;gap:16px;padding-block:7px;flex-wrap:wrap}
.util a{text-decoration:none;color:var(--on-brand)}
.util a:hover{text-decoration:underline}
.util-links{display:flex;gap:18px;flex-wrap:wrap}

/* Đầu trang */
.site-head{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;background:var(--sheet);border-bottom:1px solid var(--line)}
.head-row{display:flex;align-items:center;gap:20px;padding-block:10px}
.brand-link img{height:54px;width:auto}
.nav{display:flex;align-items:center;gap:2px;margin-left:12px;flex:1;min-width:0}
.nav>a,.nav-top{font:600 .95rem/1 var(--f-body);text-decoration:none;color:var(--ink);padding:12px 12px;border-radius:4px;background:none;border:0;cursor:pointer;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.nav>a:hover,.nav-top:hover,.nav>a[aria-current="page"]{color:var(--brand-ink);background:var(--tint)}
.nav-top::after{content:"";border:4px solid transparent;border-top:5px solid currentColor;border-bottom:0}
.has-mega{position:static}
.mega{position:absolute;left:0;right:0;top:100%;background:var(--sheet);border-bottom:1px solid var(--line);box-shadow:0 18px 30px rgba(1,28,64,.14);display:none}
.has-mega:hover .mega,.has-mega:focus-within .mega,.has-mega.open .mega{display:block}
.mega-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:32px;padding-block:26px 30px}
.mega h4{margin:0 0 10px;font:500 .72rem/1 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.mega ul{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.mega li a{display:flex;justify-content:space-between;gap:12px;text-decoration:none;padding:6px 0;font-size:.95rem}
.mega li a:hover{color:var(--brand-ink)}
.mega li small{color:var(--muted)}
.head-actions{display:flex;align-items:center;gap:14px;margin-left:auto}
.hotline{display:grid;text-decoration:none;line-height:1.1;white-space:nowrap}
.hotline small{font:500 .66rem/1.2 var(--f-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.hotline b{font:800 1.45rem/1 var(--f-display);letter-spacing:.02em;color:var(--brand-ink)}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:4px;background:none;color:var(--ink);cursor:pointer;padding:0;place-items:center}
.burger span,.burger span::before,.burger span::after{display:block;width:20px;height:2px;background:currentColor;content:"";position:relative}
.burger span::before{position:absolute;top:-6px}
.burger span::after{position:absolute;top:6px}

/* Nút */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:600 .95rem/1 var(--f-body);padding:13px 18px;border-radius:4px;text-decoration:none;cursor:pointer;border:1px solid transparent;white-space:nowrap}
.btn-solid{background:var(--brand);color:#fff}
.btn-solid:hover{background:var(--brand-deep)}
.btn-line{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-line:hover{border-color:var(--brand-ink);color:var(--brand-ink)}
.btn-white{background:#fff;color:#02489B}
.btn-white:hover{background:#E3EDF9}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}

/* Tiêu đề trang con */
.page-head{background:var(--brand-deep);color:var(--on-brand);position:relative;overflow:hidden}
.page-head .wrap{padding-block:clamp(30px,5vw,56px);position:relative}
.page-mark{position:absolute;right:-30px;top:-60px;width:300px;opacity:.07;pointer-events:none}
.crumb{font-size:.82rem;color:var(--on-brand-muted);display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.crumb a{color:var(--on-brand-muted)}
.crumb a:hover{color:#fff}
.page-head h1{margin:0;font:800 clamp(2.5rem,6vw,4.3rem)/1 var(--f-display);text-transform:uppercase;text-wrap:balance}
.page-head p{margin-top:14px;max-width:64ch;color:var(--on-brand-muted);font-size:1.08rem}

/* Khối chung */
.block{padding-block:clamp(48px,7vw,84px)}
.block.alt{background:var(--sheet);border-block:1px solid var(--line)}
.block-head{display:grid;gap:12px;margin-bottom:clamp(24px,4vw,40px)}
.block-head h2,.sub-h{margin:0;font:800 clamp(2rem,4.4vw,3rem)/1.04 var(--f-display);text-transform:uppercase;color:var(--brand-ink);text-wrap:balance}
.block-head p{max-width:64ch;color:var(--muted);font-size:1.05rem}
.eye{font:500 .76rem/1 var(--f-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}

/* Dải niềm tin */
.trust{background:var(--sheet);border-bottom:1px solid var(--line)}
.trust-row{display:grid;grid-template-columns:repeat(4,1fr)}
.trust-row div{padding:18px 18px 18px 0;display:grid;gap:2px}
.trust-row div+div{padding-left:18px;border-left:1px solid var(--line)}
.trust-row b{font:700 1.3rem/1.1 var(--f-display);text-transform:uppercase;color:var(--brand-ink)}
.trust-row span{font-size:.84rem;color:var(--muted)}

/* Dấu hiệu nguồn nước */
.signs{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
.sign{padding:20px 18px 24px 0;border-bottom:1px solid var(--line);display:grid;gap:6px;align-content:start}
.sign:not(:nth-child(4n+1)){padding-left:18px;border-left:1px solid var(--line)}
.sign h3{margin:0;font:700 1.3rem/1.1 var(--f-display);text-transform:uppercase}
.sign p{font-size:.92rem;color:var(--muted)}

/* Thẻ sản phẩm lọc tổng */
.models{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.model{background:var(--sheet);border:1px solid var(--line);border-radius:6px;overflow:hidden;display:flex;flex-direction:column}
.model-pic{position:relative;aspect-ratio:4/3;background:var(--tint);display:block;overflow:hidden}
.model-pic img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.model:hover .model-pic img{transform:scale(1.04)}
.badge{position:absolute;left:10px;top:10px;font:500 .68rem/1 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;background:var(--brand-deep);color:#fff;padding:7px 9px;border-radius:3px}
.model-body{padding:18px;display:grid;gap:10px;flex:1;align-content:start}
.model-body h3{margin:0;font:800 1.7rem/1.05 var(--f-display);text-transform:uppercase}
.model-body h3 a{text-decoration:none}
.model-body h3 a:hover{color:var(--brand-ink)}
.mini{list-style:none;margin:0;padding:0;font-size:.9rem;color:var(--muted);display:grid;gap:3px}
.mini b{color:var(--ink);font-weight:600}
.wty{font-size:.88rem;background:var(--tint);border-radius:4px;padding:9px 11px}
.wty b{color:var(--brand-ink)}
.model-foot{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:0 18px 18px}
.model-foot .btn{padding-inline:8px;font-size:.88rem}

/* Bảng so sánh */
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:6px;background:var(--sheet)}
table.cmp{border-collapse:collapse;width:100%;min-width:820px;font-size:.92rem}
table.cmp th,table.cmp td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
table.cmp thead th{background:var(--tint);font:500 .72rem/1.3 var(--f-mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
table.cmp tbody th{font:700 1.12rem/1.1 var(--f-display);text-transform:uppercase}
table.cmp tbody th a{text-decoration:none;color:var(--brand-ink)}
table.cmp tr:last-child>*{border-bottom:0}

/* Các tầng lọc */
.stages{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr)}
.stages li{padding:0 16px 0 0;display:grid;gap:6px;align-content:start}
.stages li+li{padding-left:16px;border-left:1px solid var(--line)}
.stages .no{font:800 2.8rem/1 var(--f-display);color:var(--brand-ink)}
.stages h3{margin:0;font:700 1.22rem/1.1 var(--f-display);text-transform:uppercase}
.stages p{font-size:.9rem;color:var(--muted)}
.note{margin-top:14px;font-size:.86rem;color:var(--muted)}

/* Hỏi đáp */
.faq{display:grid;border-top:1px solid var(--line);max-width:860px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;padding:16px 28px 16px 0;font-weight:600;list-style:none;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:12px;font:700 1.4rem/1.4 var(--f-display);color:var(--brand-ink)}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 28px 18px 0;color:var(--muted)}

/* Trang chi tiết */
.detail{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,5vw,56px);align-items:start}
.detail>*{min-width:0}
.detail-pic{margin:0;border-radius:6px;overflow:hidden;background:var(--tint)}
.detail-pic img{width:100%;aspect-ratio:4/5;object-fit:cover}
.detail-pic figcaption{padding:10px 14px;font-size:.82rem;color:var(--muted);background:var(--sheet);border:1px solid var(--line);border-top:0;border-radius:0 0 6px 6px}
.detail-info{display:grid;gap:18px}
.detail-info .fit{color:var(--muted);font-size:1.05rem}
.spec{width:100%;border-collapse:collapse;font-size:.95rem}
.spec th,.spec td{padding:10px 0;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.spec th{font-weight:400;color:var(--muted);width:42%;padding-right:12px}
.spec td{font-weight:600}
.price-box{background:var(--tint);border-radius:6px;padding:18px;display:grid;gap:12px}
.price-box .p{font:800 1.8rem/1 var(--f-display);text-transform:uppercase;color:var(--brand-ink)}
.price-box small{color:var(--muted);font-size:.86rem}
.btn-row{display:flex;gap:10px;flex-wrap:wrap}
.ticks{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:10px 28px}
.ticks li{padding-left:20px;position:relative}
.ticks li::before{content:"";position:absolute;left:2px;top:.62em;width:9px;height:9px;border-radius:50% 50% 50% 0;transform:rotate(-45deg);background:var(--brand-ink)}

/* Máy lọc uống */
.filters{display:grid;gap:12px;margin-bottom:24px}
.chip-row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.chip-row>span{font:500 .72rem/1 var(--f-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);min-width:82px}
.chip{font:600 .88rem/1 var(--f-body);padding:9px 13px;border-radius:999px;border:1px solid var(--line);background:var(--sheet);color:var(--ink);cursor:pointer}
.chip:hover{border-color:var(--brand-ink)}
.chip[aria-pressed="true"]{background:var(--brand);border-color:var(--brand);color:#fff}
.count{font-size:.9rem;color:var(--muted)}
.products{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.prod{background:var(--sheet);border:1px solid var(--line);border-radius:6px;padding:16px;display:flex;flex-direction:column;gap:8px}
.prod .b{font:500 .7rem/1 var(--f-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.prod .m{font:800 1.75rem/1.02 var(--f-display);text-transform:uppercase;color:var(--brand-ink);overflow-wrap:anywhere}
.prod .n{font-size:.9rem;color:var(--muted);flex:1}
.prod .tag-t{align-self:flex-start;font-size:.74rem;background:var(--tint);padding:4px 8px;border-radius:3px}
.prod .btn{padding:10px;font-size:.88rem}

/* Công trình */
.named{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);margin-bottom:34px}
.named div{padding:18px 16px 20px 0;display:grid;gap:4px;align-content:start}
.named div+div{padding-left:16px;border-left:1px solid var(--line)}
.named b{font:700 1.2rem/1.1 var(--f-display);text-transform:uppercase}
.named span{font-size:.87rem;color:var(--muted)}
.works{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.work{margin:0}
.work[hidden]{display:none}
.work img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:4px;background:var(--tint)}
.work figcaption{padding-top:10px;display:grid;gap:2px}
.work figcaption b{font:700 1.15rem/1.15 var(--f-display);text-transform:uppercase}
.work figcaption span{font-size:.85rem;color:var(--muted)}

/* Dịch vụ */
.svc-rows{display:grid;gap:clamp(36px,6vw,64px)}
.svc-row{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,5vw,56px);align-items:center}
.svc-row>*{min-width:0}
.svc-row:nth-child(even) .pic{order:2}
.svc-row .pic img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:6px}
.svc-row .txt{display:grid;gap:12px}
.svc-row h2{margin:0;font:800 clamp(1.9rem,3.8vw,2.6rem)/1.04 var(--f-display);text-transform:uppercase;color:var(--brand-ink)}
.svc-row p{color:var(--muted)}

/* Kiến thức */
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line)}
.post{padding:22px 20px 26px 0;border-bottom:1px solid var(--line);display:grid;gap:8px;align-content:start;text-decoration:none}
.post:not(:nth-child(3n+1)){padding-left:20px;border-left:1px solid var(--line)}
.post h3{margin:0;font-size:1.08rem;line-height:1.35;font-weight:600}
.post:hover h3{color:var(--brand-ink)}
.post p{font-size:.92rem;color:var(--muted)}
.post .go{font-size:.85rem;font-weight:600;color:var(--brand-ink)}

/* Chính sách */
.policy{display:grid;grid-template-columns:220px 1fr;gap:clamp(24px,5vw,56px);align-items:start}
.policy>*{min-width:0}
.toc{position:sticky;top:110px;display:grid;gap:2px}
.toc a{text-decoration:none;padding:8px 10px;border-radius:4px;font-size:.93rem;font-weight:500}
.toc a:hover{background:var(--tint);color:var(--brand-ink)}
.policy-body{display:grid;gap:44px}
.policy-body>*{min-width:0}
.policy-body h2{margin:0 0 12px;font:800 2rem/1.05 var(--f-display);text-transform:uppercase;color:var(--brand-ink)}
.policy-body ul{margin:10px 0 0;padding-left:20px;display:grid;gap:6px}
.policy-body p+p{margin-top:10px}

/* Liên hệ */
.contact-2{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,5vw,56px);align-items:start}
.contact-2>*{min-width:0}
.field{display:grid;gap:5px}
.field label{font-size:.88rem;font-weight:600}
.field input,.field select,.field textarea{font:inherit;width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:4px;background:var(--sheet);color:var(--ink)}
.form{display:grid;gap:14px}
.form .row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.consent{display:flex;gap:9px;font-size:.85rem;color:var(--muted);align-items:flex-start}
.consent input{margin-top:4px}
.form-card{background:var(--sheet);border:1px solid var(--line);border-radius:6px;padding:clamp(18px,3vw,28px)}
.form-card h2{margin:0 0 6px;font:800 2rem/1.05 var(--f-display);text-transform:uppercase;color:var(--brand-ink)}
.form-card>p{color:var(--muted);margin-bottom:16px;font-size:.95rem}
.branch-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.branch-list li{display:grid;grid-template-columns:1fr auto;gap:12px;padding:13px 0;border-bottom:1px solid var(--line)}
.branch-list b{font-weight:600}
.branch-list span{font:500 .7rem/1.6 var(--f-mono);text-transform:uppercase;letter-spacing:.08em;color:var(--brand-ink)}
.contact-big{font:800 clamp(2.4rem,6vw,3.4rem)/1 var(--f-display);color:var(--brand-ink);text-decoration:none;display:block;margin:8px 0 14px}

/* Lời mời cuối trang */
.cta{background:var(--brand);color:#fff}
.cta .wrap{display:grid;grid-template-columns:1.3fr auto;gap:24px;align-items:center;padding-block:clamp(36px,6vw,60px)}
.cta .wrap>*{min-width:0}
.cta h2{margin:0;font:800 clamp(2rem,4.6vw,3.2rem)/1.03 var(--f-display);text-transform:uppercase;text-wrap:balance}
.cta p{margin-top:8px;color:#D6E4F7}

/* Chân trang */
.site-foot{background:var(--brand-deep);color:var(--on-brand-muted);font-size:.9rem}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-block:44px 30px}
.foot-grid>*{min-width:0}
.foot-grid img{height:66px;width:auto;margin-bottom:14px}
.foot-grid h4{margin:0 0 12px;font:500 .72rem/1 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:#fff}
.foot-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:7px}
.foot-grid a{text-decoration:none}
.foot-grid a:hover{color:#fff;text-decoration:underline}
.foot-base{border-top:1px solid rgba(255,255,255,.16);padding-block:14px;font-size:.8rem}

/* Nút liên hệ nổi */
.float{position:fixed;right:max(14px,env(safe-area-inset-right,0px));bottom:calc(16px + env(safe-area-inset-bottom,0px));z-index:40;display:grid;gap:8px}
.float a,.float button{width:56px;height:56px;border-radius:50%;display:grid;place-items:center;font:700 .66rem/1 var(--f-body);text-decoration:none;color:#fff;background:var(--brand);border:2px solid #fff;box-shadow:0 8px 18px rgba(1,28,64,.28);cursor:pointer;padding:0}
.float .z{background:#0B6BE8}
.float .q{background:var(--brand-deep)}

/* Hộp báo giá */
dialog.quote{border:0;border-radius:8px;padding:0;width:min(460px,calc(100vw - 32px));max-height:calc(100dvh - 32px);background:var(--sheet);color:var(--ink)}
dialog.quote::backdrop{background:rgba(1,20,48,.6)}
.q-in{padding:24px;display:grid;gap:14px}
.q-in h2{margin:0;font:800 2rem/1.05 var(--f-display);text-transform:uppercase;color:var(--brand-ink)}
.q-in>p{color:var(--muted);font-size:.93rem}
.q-close{position:absolute;right:8px;top:8px;width:40px;height:40px;background:none;border:0;font-size:1.5rem;cursor:pointer;color:var(--muted)}
.q-msg{background:var(--tint);border-radius:4px;padding:12px;font-size:.9rem;white-space:pre-wrap;overflow-wrap:anywhere}

@media (max-width:1040px){
  .burger{display:grid}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--sheet);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;margin:0;padding:8px max(16px,env(safe-area-inset-right,0px)) 16px max(16px,env(safe-area-inset-left,0px));max-height:calc(100dvh - 90px);overflow:auto}
  .nav.open{display:flex}
  .nav>a,.nav-top{width:100%;justify-content:space-between;padding:14px 8px}
  .mega{position:static;box-shadow:none;border:0;display:none}
  .has-mega:hover .mega,.has-mega:focus-within .mega{display:none}
  .has-mega.open .mega{display:block}
  .mega .wrap{padding:0}
  .mega-grid{grid-template-columns:1fr;gap:16px;padding:6px 8px 12px}
}
@media (max-width:900px){
  .trust-row,.signs,.named{grid-template-columns:1fr 1fr}
  .trust-row div:nth-child(3){padding-left:0;border-left:0}
  .trust-row div:nth-child(n+3){border-top:1px solid var(--line)}
  .sign:not(:nth-child(4n+1)){padding-left:0;border-left:0}
  .sign:nth-child(even){padding-left:18px;border-left:1px solid var(--line)}
  .named div:nth-child(3){padding-left:0;border-left:0}
  .models,.works{grid-template-columns:1fr 1fr}
  .products{grid-template-columns:repeat(3,1fr)}
  .detail,.svc-row,.contact-2,.policy,.cta .wrap{grid-template-columns:1fr}
  .svc-row:nth-child(even) .pic{order:0}
  .toc{position:static;grid-auto-flow:column;grid-auto-columns:max-content;overflow-x:auto}
  .stages{grid-template-columns:1fr 1fr;row-gap:26px}
  .stages li:nth-child(odd){padding-left:0;border-left:0}
  .posts{grid-template-columns:1fr 1fr}
  .post:not(:nth-child(3n+1)){padding-left:0;border-left:0}
  .post:nth-child(even){padding-left:20px;border-left:1px solid var(--line)}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:620px){
  .util-addr{display:none}
  .head-actions .btn{display:none}
  .hotline b{font-size:1.2rem}
  .brand-link img{height:44px}
  .models,.posts,.stages,.ticks,.form .row2{grid-template-columns:1fr}
  .products{grid-template-columns:1fr 1fr}
  .works{grid-template-columns:1fr 1fr;gap:12px}
  .post:nth-child(even),.stages li+li{padding-left:0;border-left:0}
  .chip-row>span{min-width:100%}
  .foot-grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.model-pic img{transition:none}.model:hover .model-pic img{transform:none}}