/* ===== 星宇石化机械 · 全站样式 ===== */
:root{
  --navy:#0d2c63;
  --navy-2:#114aa8;
  --blue:#1565d6;
  --accent:#1772f6;
  --accent-2:#5b9bff;
  --steel:#5b6b82;
  --ink:#1c2733;
  --muted:#5f6b7a;
  --line:#e4e8ef;
  --bg:#ffffff;
  --bg-soft:#f2f6fd;
  --bg-soft-2:#e6eefb;
  --radius:14px;
  --shadow:0 10px 40px rgba(23,114,246,.10);
  --shadow-lg:0 20px 60px rgba(23,114,246,.16);
  --glow:rgba(91,155,255,.34);
  --maxw:1200px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.muted{color:var(--muted)}
.accent{color:var(--accent)}

/* ===== 顶部导航 ===== */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--navy);letter-spacing:.5px}
.brand .logo{
  width:42px;height:42px;border-radius:11px;flex:0 0 auto;display:block;
  box-shadow:0 6px 16px rgba(23,114,246,.3);
}
.brand .name{font-size:17px;line-height:1.2}
.brand .name small{display:block;font-size:10px;font-weight:600;color:var(--muted);letter-spacing:.2px;white-space:nowrap}
.menu{display:flex;gap:6px;align-items:center}
.menu a{padding:10px 16px;border-radius:10px;color:var(--ink);font-weight:600;font-size:15px;transition:.2s}
.menu a:hover{background:var(--bg-soft-2);color:var(--accent)}
.menu a.active{color:var(--accent)}
.nav-cta{padding:10px 20px;border-radius:10px;background:var(--accent);color:#fff !important;box-shadow:0 8px 20px rgba(23,114,246,.3)}
.nav-cta:hover{background:var(--navy) !important}
.burger{display:none;border:none;background:none;font-size:26px;color:var(--navy);cursor:pointer}

/* ===== Hero ===== */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:radial-gradient(1200px 600px at 80% -10%,var(--glow),transparent 60%),
             linear-gradient(135deg,var(--navy) 0%,var(--navy-2) 45%,var(--blue) 100%);
}
/* 动效背景：科技网格 */
.hero::after{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.55;
  background-image:
    linear-gradient(rgba(255,255,255,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(1100px 560px at 72% 16%,#000,transparent 82%);
          mask-image:radial-gradient(1100px 560px at 72% 16%,#000,transparent 82%);
  animation:gridPan 20s linear infinite;
}
@keyframes gridPan{from{background-position:0 0}to{background-position:48px 48px}}
/* 动效背景：粒子网络 */
.hero-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:1;pointer-events:none;opacity:.9}
@media (prefers-reduced-motion:reduce){
  .hero::after{animation:none}
}
.hero-inner{position:relative;z-index:2;padding-top:104px;padding-bottom:116px;display:block}
.hero-copy{max-width:760px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--accent-2);text-transform:uppercase;margin-bottom:20px}
.eyebrow::before{content:"";width:30px;height:2px;background:var(--accent-2)}
.hero h1{font-size:46px;line-height:1.2;margin:0 0 20px;font-weight:800;letter-spacing:.5px}
.hero h1 span{color:var(--accent-2)}
.hero p.lead{font-size:18px;color:#cdd9e6;max-width:560px;margin:0 0 34px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:12px;font-weight:700;font-size:15px;transition:.22s;cursor:pointer;border:none}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 12px 30px rgba(23,114,246,.4)}
.btn-primary:hover{transform:translateY(-2px);background:#fff;color:var(--navy)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.25)}
.btn-ghost:hover{background:rgba(255,255,255,.16)}
.hero-badges{display:flex;gap:28px;margin-top:44px;flex-wrap:wrap}
.hero-badges .b{display:flex;flex-direction:column}
.hero-badges .b b{font-size:30px;font-weight:800;color:#fff;line-height:1}
.hero-badges .b small{color:#9fb3c8;font-size:13px;margin-top:6px}

/* Hero 装饰图形 —— 同心环（密封件意象） */
.hero-art{position:relative;justify-self:center;width:340px;height:340px}
.hero-art .ring{position:absolute;inset:0;margin:auto;border-radius:50%;border:2px solid rgba(255,255,255,.18)}
.hero-art .ring:nth-child(1){width:340px;height:340px;animation:spin 36s linear infinite}
.hero-art .ring:nth-child(2){width:250px;height:250px;border-style:dashed;border-color:rgba(58,160,255,.5);animation:spin 24s linear infinite reverse}
.hero-art .ring:nth-child(3){width:160px;height:160px;border-color:rgba(255,255,255,.3)}
.hero-art .core{position:absolute;inset:0;margin:auto;width:96px;height:96px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent-2),var(--accent));display:grid;place-items:center;
  color:#fff;font-weight:800;font-size:13px;letter-spacing:2px;box-shadow:0 0 0 10px rgba(23,114,246,.18)}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===== 通用区块 ===== */
section{padding:86px 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 56px}
.section-head .kicker{font-size:13px;font-weight:700;letter-spacing:3px;color:var(--accent);text-transform:uppercase}
.section-head h2{font-size:34px;font-weight:800;color:var(--navy);margin:14px 0 14px;letter-spacing:.5px}
.section-head p{color:var(--muted);font-size:16px;margin:0}
.bg-soft{background:var(--bg-soft)}

/* 优势卡片 */
.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:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;
  transition:.25s;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.card .ico{
  width:54px;height:54px;border-radius:13px;display:grid;place-items:center;margin-bottom:20px;
  background:linear-gradient(135deg,rgba(23,114,246,.12),rgba(13,44,99,.08));color:var(--accent);
  font-size:24px;
}
.card h3{font-size:19px;margin:0 0 10px;color:var(--navy)}
.card p{margin:0;color:var(--muted);font-size:15px}

/* 产品分类卡 */
.cat-card{
  position:relative;overflow:hidden;border-radius:var(--radius);border:1px solid var(--line);
  background:#fff;transition:.25s;display:flex;flex-direction:column;
}
.cat-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-6px);border-color:transparent}
.cat-card .top{
  height:140px;display:grid;place-items:center;position:relative;overflow:hidden;
  background:linear-gradient(135deg,var(--navy),var(--blue));
}
.cat-card .top svg{width:74px;height:74px;opacity:.95}
.cat-card .top::after{content:"";position:absolute;right:-30px;top:-30px;width:120px;height:120px;border-radius:50%;
  border:2px dashed rgba(255,255,255,.22)}
.cat-card .body{padding:26px;flex:1;display:flex;flex-direction:column}
.cat-card .body h3{margin:0 0 8px;color:var(--navy);font-size:20px}
.cat-card .body p{margin:0 0 18px;color:var(--muted);font-size:14.5px;flex:1}
.cat-card .tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.tag{font-size:12px;font-weight:600;color:var(--blue);background:var(--bg-soft-2);padding:5px 11px;border-radius:20px}
.cat-card .more{font-weight:700;color:var(--accent);font-size:14px;display:inline-flex;align-items:center;gap:6px}
.cat-card .more::after{content:"→";transition:.2s}
.cat-card:hover .more::after{transform:translateX(4px)}

/* 应用领域 */
.apps{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.apps span{
  padding:12px 22px;border-radius:30px;background:#fff;border:1px solid var(--line);
  font-weight:600;color:var(--navy-2);font-size:15px;transition:.2s
}
.apps span:hover{background:var(--navy);color:#fff;border-color:transparent;transform:translateY(-3px)}

/* 关于/数据条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stats .s b{display:block;font-size:42px;font-weight:800;color:var(--accent);line-height:1}
.stats .s small{color:var(--muted);font-size:15px;display:block;margin-top:10px}

/* 标准认证 */
.std-list{display:flex;flex-wrap:wrap;gap:12px}
.std-list span{padding:10px 18px;border:1px solid var(--line);border-radius:10px;font-weight:700;color:var(--blue);background:#fff;font-size:14px}

/* CTA 横幅 */
.cta-band{
  background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;border-radius:20px;
  padding:56px;display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;
  position:relative;overflow:hidden;box-shadow:var(--shadow-lg)
}
.cta-band::after{content:"";position:absolute;right:-60px;bottom:-80px;width:260px;height:260px;border-radius:50%;border:2px dashed rgba(255,255,255,.18)}
.cta-band h2{margin:0 0 8px;font-size:30px;position:relative;z-index:1}
.cta-band p{margin:0;color:#cdd9e6;position:relative;z-index:1}
.cta-band .btn{position:relative;z-index:1}
/* CTA 背景：CAD 设计稿（半透明 + 模糊） */
.cta-band.cad::before{content:"";position:absolute;inset:-10px;z-index:0;pointer-events:none;
  background:url(../assets/img/seal-cad.png) center/cover no-repeat;opacity:.22;filter:blur(1.5px)}
.cta-band.cad>*{position:relative;z-index:1}

/* ===== 产品页 ===== */
.page-hero{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;padding:70px 0;text-align:center
}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{font-size:38px;margin:0 0 12px;font-weight:800}
.page-hero p{color:#bfd0e0;margin:0;font-size:16px}
/* 密封机械设计线稿背景（产品中心 banner） */
.page-hero.blueprint::before{content:"";position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:42px 42px}
.page-hero.blueprint::after{content:"";position:absolute;top:50%;right:-24px;transform:translateY(-50%);
  z-index:1;pointer-events:none;width:600px;max-width:58%;height:160%;opacity:.6;
  background:url(../assets/img/seal-blueprint.png) center right/contain no-repeat;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 44%);
          mask-image:linear-gradient(90deg,transparent,#000 44%)}
.crumbs{font-size:14px;color:#9fb3c8;margin-bottom:18px}
.crumbs a:hover{color:#fff}

.filter-bar{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin:-28px auto 44px;position:relative;z-index:2;max-width:920px}
.filter-bar button{
  padding:11px 22px;border-radius:30px;border:1px solid var(--line);background:#fff;cursor:pointer;
  font-weight:700;color:var(--navy-2);font-size:14.5px;transition:.2s;box-shadow:var(--shadow)
}
.filter-bar button:hover{color:var(--accent)}
.filter-bar button.active{background:var(--accent);color:#fff;border-color:transparent}

.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.prod{
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:.25s;
  display:flex;flex-direction:column
}
.prod:hover{box-shadow:var(--shadow);transform:translateY(-5px);border-color:transparent}
.prod .ph{
  height:130px;display:flex;align-items:center;justify-content:center;color:#fff;position:relative;overflow:hidden;
  background:linear-gradient(135deg,var(--blue),var(--navy))
}
.prod .ph .code{font-size:26px;font-weight:800;letter-spacing:1px;z-index:1}
.prod .ph::before{content:"";position:absolute;width:160px;height:160px;border-radius:50%;border:2px solid rgba(255,255,255,.15);right:-40px;top:-50px}
.prod .ph::after{content:"";position:absolute;width:90px;height:90px;border-radius:50%;border:2px dashed rgba(58,160,255,.5);left:-20px;bottom:-30px}
.prod .info{padding:22px;flex:1;display:flex;flex-direction:column}
.prod .info h3{margin:0 0 4px;font-size:18px;color:var(--navy)}
.prod .info .cat{font-size:12.5px;color:var(--accent);font-weight:700;margin-bottom:12px}
.prod .specs{list-style:none;padding:0;margin:0 0 4px;font-size:13.5px}
.prod .specs li{display:flex;justify-content:space-between;padding:6px 0;border-bottom:1px dashed var(--line);color:var(--muted)}
.prod .specs li:last-child{border-bottom:none}
.prod .specs li b{color:var(--ink);font-weight:600}
.prod .feat{margin-top:12px;font-size:13.5px;color:var(--steel);background:var(--bg-soft);padding:10px 12px;border-radius:9px;border-left:3px solid var(--accent)}

/* ===== 关于页 ===== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.about-grid h2{font-size:30px;color:var(--navy);margin:0 0 18px}
.about-grid p{color:var(--muted);margin:0 0 16px}
.value-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;text-align:center;transition:.25s}
.value-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.value-card .big{font-size:30px;font-weight:800;color:var(--accent);margin-bottom:8px}
.value-card h4{margin:0 0 6px;color:var(--navy)}
.value-card p{margin:0;font-size:14px;color:var(--muted)}
.timeline{position:relative;padding-left:28px}
.timeline::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;background:var(--line)}
.timeline .t{position:relative;padding-bottom:26px}
.timeline .t::before{content:"";position:absolute;left:-28px;top:5px;width:14px;height:14px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(23,114,246,.18)}
.timeline .t b{color:var(--navy)}
.timeline .t p{margin:4px 0 0;color:var(--muted);font-size:14.5px}

/* ===== 联系页 ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info .item{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--line)}
.contact-info .item .ci{width:46px;height:46px;flex:0 0 auto;border-radius:12px;display:grid;place-items:center;background:var(--bg-soft-2);color:var(--accent);font-size:20px}
.contact-info .item h4{margin:0 0 4px;color:var(--navy)}
.contact-info .item p{margin:0;color:var(--muted)}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.form label{display:block;font-weight:600;color:var(--navy);margin:0 0 6px;font-size:14px}
.form .row{margin-bottom:18px}
.form input,.form textarea,.form select{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;
  transition:.2s;background:var(--bg-soft)
}
.form input:focus,.form textarea:focus,.form select:focus{outline:none;border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(23,114,246,.12)}
.form .note{font-size:13px;color:var(--muted);margin-top:14px}

/* ===== 页脚 ===== */
.footer{background:var(--navy);color:#cdd9e6;padding:60px 0 28px}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer h5{color:#fff;font-size:16px;margin:0 0 18px}
.footer a,.footer p{color:#9fb3c8;font-size:14.5px;margin:0 0 10px;transition:.2s}
.footer a:hover{color:var(--accent-2)}
.footer .brand{color:#fff;margin-bottom:16px}
.footer .brand .name small{color:#7d93aa}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:44px;padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13.5px;color:#7d93aa}
.footer-bottom a{color:inherit;text-decoration:none}
.footer-bottom a:hover{color:var(--accent-2)}

/* ===== 产品图卡片（图片版） ===== */
.prod{border-radius:16px;box-shadow:0 1px 3px rgba(17,39,58,.05)}
.prod:hover{box-shadow:var(--shadow-lg);transform:translateY(-6px)}
.prod .ph{height:190px;background:#f3f6f9;display:flex;align-items:center;justify-content:center;padding:14px 16px;overflow:hidden;position:relative;border-bottom:1px solid var(--line)}
.prod .ph::before,.prod .ph::after{display:none}
.prod .ph img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply;transition:transform .35s}
.prod:hover .ph img{transform:scale(1.04)}
.prod .ph .code-badge{position:absolute;left:0;top:0;z-index:2;background:rgba(17,39,58,.8);color:#fff;font-weight:700;font-size:12.5px;padding:5px 13px;border-bottom-right-radius:12px;letter-spacing:.5px}
.prod .info{padding:18px 20px 6px;flex:1;display:flex;flex-direction:column}
.prod .info .cat{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:12px;font-weight:700;color:var(--accent);letter-spacing:.2px;margin:0 0 9px}
.prod .info .cat::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-right:7px;vertical-align:middle}
.prod .info h3{margin:0 0 14px;font-size:19px;color:var(--navy);letter-spacing:.3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.prod .specs{margin:0 0 2px;font-size:13px}
.prod .specs li{padding:7px 0}
.prod .specs li b{font-weight:700}
.prod .feat{margin:13px 0 16px;font-size:12.8px;color:var(--muted);line-height:1.6;background:none;border:none;padding:0;
  height:calc(1.6em * 2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.prod .more{margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  padding:13px 20px;border-top:1px solid var(--line);background:var(--bg-soft);
  color:var(--accent);font-weight:700;font-size:14px;transition:.22s}
.prod .more i{font-style:normal;font-size:17px;line-height:1;transition:.22s}
.prod:hover .more{background:var(--accent);color:#fff}
.prod:hover .more i{transform:translateX(5px)}

/* ===== 产品详情页 ===== */
.detail-top{padding-top:52px}
.detail-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:start}
.detail-figure{background:#f6f9fc;border:1px solid var(--line);border-radius:var(--radius);padding:20px;position:sticky;top:96px}
.detail-figure img{width:100%;border-radius:8px;mix-blend-mode:multiply}
.fig-cap{display:block;text-align:center;color:var(--muted);font-size:13px;margin-top:12px}
.detail-info .pill{display:inline-block;background:var(--bg-soft-2);color:var(--blue);font-weight:700;font-size:13px;padding:6px 14px;border-radius:20px;margin-bottom:16px}
.detail-info h2{font-size:32px;color:var(--navy);margin:0 0 16px}
.spec-table{width:100%;border-collapse:collapse;margin-top:18px}
.spec-table th{text-align:left;width:118px;color:var(--muted);font-weight:600;padding:13px 4px 13px 0;border-bottom:1px solid var(--line);vertical-align:top;font-size:14.5px;white-space:nowrap}
.spec-table td{padding:13px 0;border-bottom:1px solid var(--line);color:var(--ink);font-weight:600;font-size:15px}
.sheet-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);text-align:center;max-width:780px;margin:0 auto}
.sheet-wrap img{width:100%;border-radius:6px}

/* ===== 统一图标（线性 SVG） ===== */
.card .ico svg{width:26px;height:26px;stroke:currentColor;stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round;display:block}
.contact-info .item .ci svg{width:22px;height:22px;stroke:currentColor;stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round;display:block}

/* ===== 响应式 ===== */
@media(max-width:960px){
  .container{padding:0 22px}
  .hero-inner{padding-top:84px;padding-bottom:92px}
  .hero h1{font-size:40px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid,.contact-grid,.detail-grid{grid-template-columns:1fr}
  .detail-figure{position:static}
  .stats{grid-template-columns:repeat(2,1fr);gap:30px}
  .footer .cols{grid-template-columns:1fr 1fr}
  .cta-band{padding:44px 36px}
}
@media(max-width:640px){
  .container{padding:0 20px}
  .nav-inner{height:62px}
  .hero-inner{padding-top:60px;padding-bottom:68px}
  .menu{
    display:none;position:absolute;top:62px;left:0;right:0;background:#fff;flex-direction:column;
    padding:12px 18px;gap:2px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)
  }
  .menu.open{display:flex}
  .menu a{padding:12px 14px}
  .nav-cta{text-align:center;margin-top:4px}
  .burger{display:block}
  .brand .logo{width:38px;height:38px}
  .brand .name{font-size:15px}
  .brand .name small{display:none}
  .eyebrow{margin-bottom:14px}
  .hero h1{font-size:28px;line-height:1.28}
  .hero p.lead{font-size:15.5px;margin-bottom:28px}
  .hero-actions{gap:10px}
  .hero-actions .btn{flex:1;justify-content:center;padding:13px 16px}
  .hero-badges{gap:18px 24px;margin-top:30px}
  .hero-badges .b b{font-size:24px}
  .section-head{margin-bottom:40px}
  .section-head h2{font-size:24px}
  .section-head p{font-size:15px}
  .grid-4,.grid-3,.grid-2,.prod-grid{grid-template-columns:1fr}
  .card{padding:26px}
  .stats{grid-template-columns:1fr 1fr;gap:22px}
  .stats .s b{font-size:34px}
  .apps{gap:10px}
  .apps span{padding:10px 16px;font-size:14px}
  .cta-band{padding:32px 22px;text-align:center;justify-content:center}
  .cta-band h2{font-size:23px}
  .cta-band::after{display:none}
  .filter-bar{margin:-22px auto 30px;gap:8px}
  .filter-bar button{padding:9px 15px;font-size:13.5px}
  .page-hero{padding:52px 0}
  .page-hero h1{font-size:29px}
  .page-hero.blueprint::after{width:340px;max-width:72%;opacity:.3;right:-44px}
  .page-hero.blueprint::before{opacity:.32}
  .detail-top{padding-top:38px}
  .detail-info h2{font-size:26px}
  .detail-figure{padding:14px}
  .spec-table th{width:92px;font-size:14px}
  .sheet-wrap{padding:14px}
  .prod .ph{height:210px}
  .footer{padding:48px 0 24px}
  .footer .cols{grid-template-columns:1fr;gap:26px}
  .footer p,.footer a{font-size:13px}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center;justify-content:center;font-size:12.5px}
  section{padding:54px 0}
}
@media(max-width:400px){
  .hero h1{font-size:25px}
  .hero-badges{gap:14px 18px}
  .hero-badges .b b{font-size:22px}
  .section-head h2{font-size:22px}
}