/* =========================================================================
   Rotashine 官网 · v3 设计系统
   参照基准（本轮实测的头部化工集团）：
   BASF 版心 1312 / 断点 672-1056-1312-1584 / 首屏 55-65px 对正文 16-18px
   Evonik h1 三档 28-32-60 / 欧洲派圆角 0-4px / 胶囊只给按钮
   Clariant 亮蓝+4px 圆角 / WACKER 产品页六段式 / Indium 吸顶子导航
   ========================================================================= */

:root{
  /* ---- 靛蓝色轴 ---- */
  --c-950:#060714;
  --c-900:#0C0E2A;
  --c-800:#161944;
  --c-700:#2F328C;
  --c-600:#4348AE;
  --c-400:#7B7FD4;
  --c-200:#C9CBF0;
  --c-100:#E9E9F7;
  --c-50:#F6F6FC;

  /* ---- 强调色（比 v2 略深，更企业） ---- */
  --accent:#C4202F;
  --accent-dark:#9E1826;

  /* ---- 中性 ---- */
  --ink:#101127;
  --body:#4A4C66;
  --muted:#878AA6;
  --line:#E3E3F0;
  --line-strong:#CFCFE2;

  /* ---- 字体：显示 / 正文 / 数据 ---- */
  --font-display:'Archivo','Noto Sans SC','Noto Sans JP',-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Noto Sans','Noto Sans SC','Noto Sans JP',-apple-system,'PingFang SC','Hiragino Kaku Gothic ProN','Yu Gothic','Microsoft YaHei',sans-serif;
  --font-mono:'IBM Plex Mono','SFMono-Regular',Menlo,Consolas,monospace;

  /* ---- 字号级差（大厂的标志：首屏与正文拉开 3-4 倍） ---- */
  --fs-display:clamp(34px,5vw,62px);
  --fs-h1:clamp(30px,3.6vw,44px);
  --fs-h2:clamp(24px,2.6vw,36px);
  --fs-h3:20px;
  --fs-h4:17px;
  --fs-body:17px;
  --fs-small:14px;
  --fs-micro:12px;

  --container:1320px;
  --gutter:32px;
  --radius:2px;
  --radius-card:4px;
  --radius-pill:9999px;
  --section-y:clamp(64px,7.5vw,128px);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;font-family:var(--font-body);font-size:var(--fs-body);line-height:1.72;
  color:var(--body);background:#fff;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
::selection{background:var(--c-100);color:var(--c-800);}
:focus-visible{outline:2px solid var(--c-700);outline-offset:2px;}
img{max-width:100%;display:block;}
a{color:var(--c-700);text-decoration:none;transition:color .16s ease;}
a:hover{color:var(--c-600);}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--ink);margin:0 0 .5em;font-weight:600;letter-spacing:-.02em;text-wrap:balance;}
h1{font-size:var(--fs-h1);line-height:1.14;}
h2{font-size:var(--fs-h2);line-height:1.18;}
h3{font-size:var(--fs-h3);line-height:1.38;letter-spacing:-.01em;}
h4{font-size:var(--fs-h4);line-height:1.4;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
.container{max-width:var(--container);margin:0 auto;padding:0 var(--gutter);}
.section{padding:var(--section-y) 0;}
.section--tint{background:var(--c-50);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section--flush{padding-top:0;}
.hr{height:1px;background:var(--line);border:0;margin:0;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum";font-size:.92em;letter-spacing:-.01em;}

/* ---------- 眉标 ---------- */
.eyebrow{display:flex;align-items:center;gap:14px;margin:0 0 20px;}
.eb-num{font-family:var(--font-mono);font-size:var(--fs-micro);font-weight:500;letter-spacing:.08em;color:var(--c-400);}
.eb-rule{width:28px;height:1px;background:var(--line-strong);flex:none;}
.eb-txt{font-size:var(--fs-micro);font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--c-700);}
.on-dark .eb-num{color:var(--c-400);}
.on-dark .eb-rule{background:rgba(255,255,255,.28);}
.on-dark .eb-txt{color:#fff;}

/* ---------- 章节头 ---------- */
.section-head{max-width:800px;margin:0 0 56px;}
.section-head--wide{max-width:none;}
.section-head .lede{font-size:19px;line-height:1.65;color:var(--body);margin:0;}
.section-head--split{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:56px;align-items:end;max-width:none;}

/* ---------- 演示条 ---------- */
.demo-bar{background:var(--c-100);color:var(--c-700);font-size:13px;line-height:1.6;text-align:center;padding:7px 16px;border-bottom:1px solid var(--c-200);}
.demo-bar strong{color:var(--accent);}

/* ---------- 页头 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line);}
.header-inner{display:flex;align-items:center;gap:48px;height:78px;}
.brand{display:flex;align-items:center;gap:12px;flex:none;}
.brand-mark{width:30px;height:30px;border-radius:50%;flex:none;background:linear-gradient(140deg,#A9B4C6,#CDBECB 42%,#9BB9AE 72%,#D6C29C);box-shadow:inset -3px -3px 8px rgba(12,14,42,.32),inset 3px 3px 8px rgba(255,255,255,.7);}
.brand-text{display:flex;flex-direction:column;line-height:1.08;}
.brand-name{font-family:var(--font-display);font-weight:600;font-size:17px;letter-spacing:.22em;color:var(--c-800);}
.brand-cn{font-size:11px;color:var(--muted);letter-spacing:.24em;}
.nav{display:flex;gap:4px;margin-right:auto;}
.nav-item{position:relative;}
.nav-link{display:block;padding:10px 16px;font-size:15px;font-weight:500;color:var(--ink);border-radius:var(--radius);}
.nav-link:hover{color:var(--c-700);background:var(--c-50);}
.header-actions{display:flex;align-items:center;gap:20px;flex:none;}
.lang-switch{display:flex;align-items:center;gap:9px;font-size:13px;}
.lang-switch a{color:var(--muted);}
.lang-switch a:hover{color:var(--c-700);}
.lang-switch .active{color:var(--ink);font-weight:600;}
.lang-switch .sep{color:var(--c-200);}

/* Mega menu */
.mega{position:absolute;top:100%;left:0;min-width:720px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:0 24px 60px rgba(12,14,42,.14);padding:32px;display:none;grid-template-columns:repeat(3,1fr);gap:32px;}
.nav-item:hover .mega{display:grid;}
.mega h5{font-family:var(--font-display);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:0 0 14px;font-weight:600;}
.mega ul{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
.mega a{display:block;font-size:14px;color:var(--ink);line-height:1.45;}
.mega a span{display:block;font-size:12px;color:var(--muted);}
.mega a:hover{color:var(--c-700);}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:13px 28px;border-radius:var(--radius-pill);font-size:15px;font-weight:600;font-family:var(--font-body);cursor:pointer;border:1px solid transparent;transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;white-space:nowrap;line-height:1.2;}
.btn--primary{background:var(--accent);color:#fff;}
.btn--primary:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);}
.btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.38);}
.btn--ghost:hover{border-color:#fff;background:rgba(255,255,255,.1);color:#fff;}
.btn--outline{background:transparent;color:var(--c-700);border-color:var(--line-strong);}
.btn--outline:hover{background:var(--c-700);border-color:var(--c-700);color:#fff;}
.btn--sm{padding:9px 20px;font-size:14px;}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;align-items:center;}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--c-700);}
.link-arrow::after{content:"→";transition:transform .2s ease;}
.link-arrow:hover::after{transform:translateX(4px);}

/* ---------- Hero ---------- */
.hero{background:var(--c-800);color:#fff;position:relative;overflow:hidden;padding:clamp(64px,7vw,104px) 0 clamp(56px,6vw,88px);}
.hero::before{content:"";position:absolute;top:-40%;right:-6%;width:760px;height:760px;pointer-events:none;background:radial-gradient(circle at 42% 42%,rgba(169,171,224,.24),rgba(123,127,212,.08) 48%,transparent 72%);}
.hero-inner{position:relative;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:72px;align-items:center;}
.hero-kicker{display:inline-flex;align-items:center;gap:10px;font-size:var(--fs-micro);font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--c-400);margin-bottom:22px;}
.hero-kicker::before{content:"";width:28px;height:1px;background:rgba(255,255,255,.3);}
.hero-title{font-size:var(--fs-display);line-height:1.05;letter-spacing:-.028em;color:#fff;margin:0 0 26px;font-weight:600;}
.hero-sub{color:#BFC1DE;font-size:17px;line-height:1.68;max-width:560px;margin:0 0 36px;}
.hero--slim{padding:clamp(48px,5vw,76px) 0;}
.hero--slim .hero-title{font-size:var(--fs-h1);margin-bottom:16px;}
.hero--slim .hero-sub{margin-bottom:0;}
.hero-visual{position:relative;}
.hero-visual-cap{display:block;font-size:var(--fs-micro);font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--c-400);margin-bottom:18px;}

/* 产品家族卡 */
.family{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;}
.family-card{border:1px solid rgba(255,255,255,.13);border-radius:var(--radius-card);background:linear-gradient(155deg,rgba(255,255,255,.07),rgba(255,255,255,.015));padding:16px;display:flex;flex-direction:column;gap:14px;transition:border-color .18s ease,background .18s ease;}
.family-card:hover{border-color:rgba(255,255,255,.34);background:linear-gradient(155deg,rgba(255,255,255,.11),rgba(255,255,255,.03));}
.family-card .sample{height:118px;border-radius:var(--radius);}
.family-card b{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:#fff;font-weight:500;}
.family-card i{display:block;font-style:normal;font-size:12px;color:var(--c-400);}

/* ---------- KPI 带 ---------- */
.kpi-band{background:var(--c-50);border-bottom:1px solid var(--line);}
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.kpi{padding:44px 32px;border-right:1px solid var(--line);}
.kpi:first-child{padding-left:0;}
.kpi:last-child{border-right:none;}
.kpi-num{display:block;font-family:var(--font-display);font-size:clamp(30px,3.2vw,44px);font-weight:600;color:var(--c-700);line-height:1;letter-spacing:-.025em;margin-bottom:14px;font-variant-numeric:tabular-nums;}
.kpi-num i{font-style:normal;font-family:var(--font-body);font-size:.42em;font-weight:500;color:var(--body);margin-left:9px;letter-spacing:0;vertical-align:.14em;}
.kpi-label{display:block;font-size:13px;line-height:1.5;color:var(--body);}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;}
.grid--2{grid-template-columns:repeat(2,1fr);}
.grid--3{grid-template-columns:repeat(3,1fr);}
.grid--4{grid-template-columns:repeat(4,1fr);}
.grid > *{background:#fff;padding:36px 32px;}
.grid--loose{gap:24px;background:transparent;border:none;overflow:visible;}
.grid--loose > *{border:1px solid var(--line);border-radius:var(--radius-card);}

/* ---------- 图标 ---------- */
.icon{width:26px;height:26px;stroke:var(--c-700);stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round;margin-bottom:20px;}
.icon--lg{width:32px;height:32px;}
.grid h3{margin-bottom:10px;}
.grid p{font-size:15px;margin:0;}

/* ---------- 卡片 ---------- */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:32px;transition:border-color .18s ease,box-shadow .18s ease;}
.card:hover{border-color:var(--line-strong);box-shadow:0 12px 32px rgba(12,14,42,.06);}

/* 应用/市场卡 */
.market-card{display:flex;flex-direction:column;gap:14px;}
.market-card .m-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto;padding-top:14px;}
.tag{display:inline-block;font-size:11px;font-weight:600;letter-spacing:.02em;padding:4px 11px;border-radius:var(--radius-pill);background:var(--c-100);color:var(--c-700);}
.tag--accent{background:#FAE7E9;color:var(--accent);}
.tag--line{background:transparent;border:1px solid var(--line-strong);color:var(--body);}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-card);background:#fff;}
table.data{width:100%;border-collapse:collapse;font-size:15px;min-width:620px;}
table.data caption{text-align:left;padding:18px 24px 0;font-size:12px;color:var(--muted);}
table.data th,table.data td{padding:16px 24px;text-align:left;border-bottom:1px solid var(--line);vertical-align:middle;}
table.data thead th{background:#fff;color:var(--c-700);font-family:var(--font-display);font-size:11px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;border-bottom:1px solid var(--line-strong);white-space:nowrap;}
table.data tbody tr:last-child td{border-bottom:none;}
table.data tbody tr:hover{background:var(--c-50);}
table.data td.mono{font-family:var(--font-mono);font-size:14px;}
table.data.plain{min-width:0;}
.note{font-size:13px;color:var(--muted);margin-top:14px;}

/* ---------- 深色带 ---------- */
.band-dark{background:var(--c-800);color:#fff;position:relative;padding:var(--section-y) 0;}
.band-dark::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,var(--c-700),var(--c-400),#D6C29C,var(--c-400));}
.band-dark h2,.band-dark h3{color:#fff;}
.band-dark p{color:#B9BBD9;}
.cert-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px;}
.cert-pill{border:1px solid rgba(255,255,255,.22);border-radius:var(--radius-pill);padding:9px 20px;font-size:13px;color:#fff;}
.reg-list{display:grid;gap:1px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius-card);overflow:hidden;}
.reg-list > div{background:var(--c-800);padding:22px 24px;}
.reg-list b{display:block;color:#fff;font-size:15px;font-family:var(--font-display);margin-bottom:6px;}
.reg-list span{font-size:14px;color:#B9BBD9;}

/* ---------- 产品 ---------- */
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:36px;}
.filter-bar button{font-family:var(--font-body);font-size:14px;padding:9px 20px;border-radius:var(--radius-pill);border:1px solid var(--line-strong);background:#fff;color:var(--body);cursor:pointer;transition:all .16s ease;}
.filter-bar button:hover{border-color:var(--c-700);color:var(--c-700);}
.filter-bar button.active{background:var(--c-800);border-color:var(--c-800);color:#fff;font-weight:600;}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.product-card{border:1px solid var(--line);border-radius:var(--radius-card);background:#fff;overflow:hidden;display:flex;flex-direction:column;transition:border-color .18s ease,box-shadow .18s ease;}
.product-card:hover{border-color:var(--line-strong);box-shadow:0 12px 32px rgba(12,14,42,.07);}
.product-thumb{position:relative;}
.product-thumb .model{position:absolute;left:16px;bottom:14px;background:rgba(6,7,20,.8);color:#fff;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;padding:5px 12px;border-radius:var(--radius-pill);}
.product-body{padding:26px;display:flex;flex-direction:column;gap:14px;flex:1;}
.product-body h3{margin:0;font-size:18px;}
.product-spec{display:flex;gap:12px;font-size:13px;margin:0;line-height:1.55;}
.product-spec b{color:var(--muted);font-weight:500;flex:none;min-width:72px;}
.product-spec span{color:var(--body);}
.product-body .link-arrow{margin-top:auto;padding-top:8px;}

/* 珠光样本：全站唯一颜色母题 */
.sample{position:relative;display:flex;align-items:center;justify-content:center;background:linear-gradient(155deg,var(--c-800) 0%,var(--c-900) 100%);overflow:hidden;}
.sample::before{content:"";position:absolute;inset:0;background:radial-gradient(90% 70% at 50% 42%,rgba(169,171,224,.16),transparent 72%);}
.sample-disc{position:relative;flex:none;border-radius:50%;box-shadow:0 10px 34px rgba(0,0,0,.42),inset 0 0 0 1px rgba(255,255,255,.14);}
.sample--thumb{height:168px;} .sample--thumb .sample-disc{width:108px;height:108px;}
.sample--panel{height:230px;} .sample--panel .sample-disc{width:150px;height:150px;}
.sample--detail{height:340px;} .sample--detail .sample-disc{width:212px;height:212px;}
.dot{display:inline-block;width:26px;height:26px;border-radius:50%;position:relative;vertical-align:-8px;margin-right:12px;overflow:hidden;box-shadow:inset 0 0 0 1px rgba(16,17,39,.10);}

/* ---------- 产品详情 ---------- */
.breadcrumb{font-size:13px;color:var(--muted);padding:24px 0 0;display:flex;gap:10px;flex-wrap:wrap;align-items:center;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--c-700);}
.breadcrumb span{color:var(--c-200);}
.detail-head{display:grid;grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);gap:64px;align-items:start;padding:28px 0 56px;}
.detail-model{display:inline-block;font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--c-700);background:var(--c-100);border-radius:var(--radius-pill);padding:5px 14px;margin-bottom:18px;}
.detail-head h1{font-size:clamp(28px,3.2vw,40px);}
.detail-meta{font-size:14px;color:var(--muted);margin:0 0 22px;font-family:var(--font-mono);}
.spec-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;margin:0 0 26px;}
.spec-strip div{background:#fff;padding:18px 20px;}
.spec-strip span{display:block;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:6px;}
.spec-strip b{font-family:var(--font-display);font-size:18px;color:var(--ink);font-weight:600;}
.spec-strip b.mono{font-family:var(--font-mono);font-size:16px;}
.file-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px;}
.file-btn{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:600;border:1px solid var(--line-strong);border-radius:var(--radius-pill);padding:9px 18px;color:var(--c-700);background:#fff;}
.file-btn:hover{border-color:var(--c-700);background:var(--c-50);color:var(--c-700);}
.file-btn::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none;}

/* 吸顶页内导航 */
.subnav{position:sticky;top:78px;z-index:40;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.subnav-inner{display:flex;gap:4px;overflow-x:auto;}
.subnav a{padding:16px 18px;font-size:14px;font-weight:500;color:var(--body);border-bottom:2px solid transparent;white-space:nowrap;}
.subnav a:hover{color:var(--c-700);}
.block{padding:64px 0;border-bottom:1px solid var(--line);scroll-margin-top:150px;}
.block:last-child{border-bottom:none;}
.block-head{margin-bottom:24px;}
.block h2{font-size:clamp(21px,2vw,26px);margin:0;}

/* ---------- 表单 ---------- */
.form{display:grid;gap:20px;max-width:640px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field label{font-size:14px;font-weight:600;color:var(--ink);}
.field .req{color:var(--accent);}
.field input,.field textarea,.field select{font-family:var(--font-body);font-size:15px;padding:12px 14px;border:1px solid var(--line-strong);border-radius:var(--radius);background:#fff;color:var(--ink);width:100%;}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--c-700);box-shadow:0 0 0 3px rgba(47,50,140,.1);}
.field textarea{min-height:140px;resize:vertical;}
.field .hint{font-size:12px;color:var(--muted);}
.form-ok{color:var(--c-700);font-weight:600;margin:0;}
.split{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:64px;align-items:start;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-900);color:#9598BA;padding:clamp(56px,6vw,88px) 0 32px;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr 1.1fr;gap:40px;}
.site-footer h4{color:#fff;font-size:11px;letter-spacing:.16em;text-transform:uppercase;margin-bottom:20px;font-family:var(--font-display);font-weight:600;}
.site-footer a{color:#9598BA;}
.site-footer a:hover{color:#fff;}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:11px;}
.footer-brand .brand-name{color:#fff;letter-spacing:.22em;}
.footer-brand p{color:#7A7D9F;margin:20px 0 0;font-size:13px;line-height:1.7;max-width:320px;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:56px;padding-top:24px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:13px;color:#7A7D9F;}

/* ---------- 响应式 ---------- */
/* ---------- 移动端导航（汉堡菜单，小屏下导航不再直接消失） ---------- */
.nav-toggle{display:none;width:40px;height:40px;padding:9px;background:none;border:0;cursor:pointer;flex-direction:column;justify-content:center;gap:5px;flex:none;}
.nav-toggle span{display:block;width:22px;height:2px;border-radius:1px;background:var(--ink);transition:transform .22s ease,opacity .18s ease;}
.nav-cta{display:none;}

@media (max-width:1200px){
  .header-inner{gap:28px;}
  .nav-link{padding:10px 12px;font-size:14px;}
  .mega{min-width:600px;}
}
@media (max-width:1024px){
  :root{--gutter:24px;--fs-body:16px;}
  .hero-inner{grid-template-columns:1fr;gap:48px;}
  .detail-head,.split,.section-head--split{grid-template-columns:1fr;gap:36px;}
  .grid--4,.kpi-grid{grid-template-columns:repeat(2,1fr);}
  .kpi:nth-child(even){border-right:none;}
  .kpi:nth-child(odd){padding-left:0;}
  .kpi{border-bottom:1px solid var(--line);}
  .product-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .mega{display:none!important;}
}
@media (max-width:720px){
  .header-inner{height:68px;gap:14px;}
  .header-actions{gap:12px;}
  .header-actions .btn{display:none;}
  .nav-toggle{display:flex;}
  .nav{
    display:none;position:fixed;left:0;right:0;top:68px;z-index:55;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:0 20px 44px rgba(12,14,42,.14);
    flex-direction:column;gap:0;margin:0;padding:4px 24px 24px;
    max-height:calc(100vh - 68px);overflow-y:auto;
  }
  body.nav-open .nav{display:flex;}
  body.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  body.nav-open .nav-toggle span:nth-child(2){opacity:0;}
  body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
  .nav-item{width:100%;}
  .nav-link{padding:17px 0;font-size:16px;border-bottom:1px solid var(--line);border-radius:0;}
  .nav-cta{display:block;padding-top:22px;}
  .nav-cta .btn{width:100%;}
  .grid--2,.grid--3,.grid--4,.product-grid,.kpi-grid{grid-template-columns:1fr;}
  .kpi{border-right:none;}
  .footer-grid{grid-template-columns:1fr;}
  .family{grid-template-columns:repeat(2,1fr);}
  .spec-strip{grid-template-columns:1fr;}
  .subnav{top:68px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
}