/* ===================================================================
   瑞泉水处理 - 反渗透设备营销网站
   Author: 闫宝龙
   Design: 深海蓝 + 科技青 工业风
=================================================================== */

:root{
  --c-primary: #0A2540;
  --c-primary-2: #0F3460;
  --c-accent: #00A6E3;
  --c-accent-2: #33d6ff;
  --c-warn: #FF6B35;
  --c-text: #1A2B40;
  --c-muted: #5A6B7E;
  --c-line: #E2E8F0;
  --c-bg: #FFFFFF;
  --c-soft: #F4F7FB;
  --c-soft-2: #EDF2F7;
  --shadow-sm: 0 2px 8px rgba(10,37,64,.06);
  --shadow-md: 0 8px 24px rgba(10,37,64,.10);
  --shadow-lg: 0 20px 60px rgba(10,37,64,.18);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --maxw: 1280px;
  --hd-h: 72px;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;
  --ease: cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-sans);
  color:var(--c-text);
  background:var(--c-bg);
  line-height:1.7;
  font-size:15px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul{list-style:none}
sup{font-size:.55em;vertical-align:super}

.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ============== Section Head ============== */
.section-head{
  text-align:center;
  margin-bottom:56px;
  max-width:780px;
  margin-left:auto;
  margin-right:auto;
}
.section-head .kicker{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--c-accent);
  font-weight:500;
  margin-bottom:14px;
  text-transform:uppercase;
  padding:6px 14px;
  border:1px solid rgba(0,166,227,.25);
  border-radius:99px;
  background:rgba(0,166,227,.05);
}
.section-head h2{
  font-family:var(--font-serif);
  font-size:clamp(28px,3.6vw,42px);
  font-weight:700;
  color:var(--c-primary);
  line-height:1.25;
  margin-bottom:16px;
  letter-spacing:.02em;
}
.section-head p{
  color:var(--c-muted);
  font-size:15px;
  line-height:1.8;
}

/* ============== Header / Nav ============== */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:99;
  height:var(--hd-h);
  background:rgba(10,37,64,.35);
  backdrop-filter:blur(18px) saturate(160%);
  -webkit-backdrop-filter:blur(18px) saturate(160%);
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:background .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.site-header.scrolled{
  background:rgba(255,255,255,.96);
  box-shadow:0 4px 20px rgba(10,37,64,.08);
  border-bottom-color:rgba(10,37,64,.06);
}
.nav-wrap{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 24px;
  height:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}

.brand{
  display:flex;align-items:center;gap:10px;
  flex-shrink:0;
}
.brand-mark{display:flex;align-items:center;justify-content:center;filter:drop-shadow(0 2px 8px rgba(0,166,227,.4));flex-shrink:0}
.brand-text{
  display:flex;align-items:center;gap:8px;
  font-family:var(--font-serif);
  font-size:18px;
  font-weight:600;
  color:#fff;
  transition:color .3s var(--ease);
  white-space:nowrap;
}
.site-header.scrolled .brand-text{color:var(--c-primary)}
.brand-name{
  position:relative;
  background:linear-gradient(135deg, #33d6ff 0%, #00A6E3 60%, #fff 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  font-weight:900;
  font-size:19px;
  letter-spacing:.04em;
  text-shadow:0 0 18px rgba(0,166,227,.25);
  filter:drop-shadow(0 0 12px rgba(0,166,227,.35));
}
.brand-name .r-mark{
  font-size:11px;
  color:var(--c-accent-2);
  -webkit-text-fill-color:var(--c-accent-2);
  font-weight:700;
  margin-left:1px;
  vertical-align:super;
  position:relative;
  top:-6px;
}
.brand-divider{color:rgba(255,255,255,.4);font-weight:300}
.site-header.scrolled .brand-divider{color:rgba(10,37,64,.3)}
.brand-tag{
  font-family:var(--font-sans);
  font-size:13px;
  font-weight:500;
  letter-spacing:.04em;
  color:rgba(255,255,255,.9);
  padding:4px 9px;
  border:1px solid rgba(0,166,227,.4);
  border-radius:4px;
  background:rgba(0,166,227,.1);
  white-space:nowrap;
}
.site-header.scrolled .brand-tag{
  color:var(--c-accent);
  border-color:var(--c-accent);
  background:rgba(0,166,227,.06);
}

.primary-nav{display:flex;align-items:center;gap:12px;flex:1;justify-content:flex-end}
.primary-nav>ul{
  display:flex;align-items:center;gap:0;
  margin-right:8px;
}
.primary-nav>ul a{
  display:inline-block;
  padding:8px 10px;
  font-size:14px;
  font-weight:500;
  color:rgba(255,255,255,.85);
  border-radius:6px;
  position:relative;
  transition:color .2s var(--ease);
  white-space:nowrap;
}
.site-header.scrolled .primary-nav>ul a{color:var(--c-text)}
.primary-nav>ul a:hover{color:#fff}
.site-header.scrolled .primary-nav>ul a:hover{color:var(--c-accent)}
.primary-nav>ul a::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:2px;
  transform:translateX(-50%) scaleX(0);
  width:18px;height:2px;
  background:var(--c-accent);
  border-radius:2px;
  transition:transform .25s var(--ease);
}
.primary-nav>ul a:hover::after{transform:translateX(-50%) scaleX(1)}

.nav-cta{
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 16px;
  background:var(--c-warn);
  color:#fff !important;
  border-radius:99px;
  font-size:14px;
  font-weight:600;
  box-shadow:0 4px 16px rgba(255,107,53,.35);
  transition:transform .2s var(--ease), box-shadow .2s var(--ease);
  white-space:nowrap;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 6px 22px rgba(255,107,53,.5)}

.nav-toggle{
  display:none;
  width:40px;height:40px;
  flex-direction:column;justify-content:center;align-items:center;
  gap:5px;
}
.nav-toggle span{
  display:block;
  width:22px;height:2px;
  background:#fff;
  transition:transform .25s var(--ease), opacity .25s var(--ease);
}
.site-header.scrolled .nav-toggle span{background:var(--c-primary)}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============== Hero ============== */
.hero{
  position:relative;
  min-height:100vh;
  padding-top:calc(var(--hd-h) + 60px);
  padding-bottom:80px;
  display:flex;flex-direction:column;justify-content:center;
  background:linear-gradient(135deg, #061A2E 0%, #0A2540 50%, #0F3460 100%);
  color:#fff;
  overflow:hidden;
}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-gradient{
  position:absolute;inset:0;
  background:
    radial-gradient(1200px 600px at 80% 10%, rgba(0,166,227,.28) 0%, transparent 60%),
    radial-gradient(800px 500px at 10% 90%, rgba(51,214,255,.18) 0%, transparent 60%),
    radial-gradient(600px 400px at 50% 50%, rgba(0,166,227,.08) 0%, transparent 70%);
}
#heroCanvas{position:absolute;inset:0;width:100%;height:100%;opacity:.7}
.hero-ripple{
  position:absolute;
  left:0;right:0;bottom:0;
  width:100%;height:200px;
  z-index:1;
}
.hero-content{
  position:relative;z-index:2;
  max-width:var(--maxw);
  margin:0 auto;
  padding:40px 24px 0;
  width:100%;
}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--c-accent-2);
  text-transform:uppercase;
  padding:6px 14px;
  border:1px solid rgba(51,214,255,.3);
  border-radius:99px;
  background:rgba(51,214,255,.06);
  margin-bottom:24px;
}
.hero-title{
  font-family:var(--font-serif);
  font-size:clamp(34px, 5.4vw, 64px);
  line-height:1.18;
  font-weight:700;
  letter-spacing:.02em;
  margin-bottom:24px;
  max-width:900px;
}
.hero-title strong{
  background:linear-gradient(135deg, #33d6ff 0%, #00A6E3 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  position:relative;
  display:inline-block;
  filter:drop-shadow(0 0 24px rgba(0,166,227,.4));
}
.hero-sub{
  font-size:clamp(15px, 1.5vw, 18px);
  line-height:1.85;
  color:rgba(255,255,255,.78);
  max-width:680px;
  margin-bottom:36px;
}
.hero-actions{
  display:flex;flex-wrap:wrap;gap:16px;
  margin-bottom:64px;
}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 28px;
  font-size:15px;
  font-weight:600;
  border-radius:var(--radius-sm);
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
  cursor:pointer;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg, #00A6E3 0%, #0084C2 100%);
  color:#fff;
  box-shadow:0 8px 24px rgba(0,166,227,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(0,166,227,.5)}
.btn-ghost{
  background:rgba(255,255,255,.08);
  color:#fff;
  border:1px solid rgba(255,255,255,.2);
  backdrop-filter:blur(8px);
}
.btn-ghost:hover{background:rgba(255,255,255,.16);transform:translateY(-2px)}

.hero-stats{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:16px;
  max-width:780px;
  padding:24px 28px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius-md);
  backdrop-filter:blur(8px);
}
.hero-stats li{
  display:flex;flex-direction:column;
  text-align:center;
  border-right:1px solid rgba(255,255,255,.08);
  padding:0 8px;
}
.hero-stats li:last-child{border-right:none}
.hero-stats b{
  font-family:var(--font-serif);
  font-size:clamp(26px, 3vw, 36px);
  font-weight:700;
  color:#fff;
  display:block;
  line-height:1;
  margin-bottom:6px;
}
.hero-stats b small{
  font-size:.5em;
  color:var(--c-accent-2);
  font-weight:500;
  margin-left:2px;
}
.hero-stats span{
  font-size:12px;
  color:rgba(255,255,255,.65);
  letter-spacing:.1em;
}

.hero-clients{
  position:relative;z-index:2;
  margin-top:auto;
  padding:18px 0;
  background:rgba(0,0,0,.25);
  border-top:1px solid rgba(255,255,255,.08);
  overflow:hidden;
}
.hero-clients-track{
  display:flex;align-items:center;gap:48px;
  white-space:nowrap;
  animation:scroll 40s linear infinite;
  font-size:14px;
  color:rgba(255,255,255,.55);
  font-family:var(--font-serif);
  letter-spacing:.1em;
  padding-left:48px;
}
.hero-clients-track span:first-child{color:var(--c-accent-2);font-weight:600}
@keyframes scroll{
  from{transform:translateX(0)}
  to{transform:translateX(-50%)}
}

/* ============== About ============== */
.about{padding:120px 0;background:var(--c-bg);position:relative}
.about::before{
  content:"";position:absolute;
  top:80px;right:-100px;width:400px;height:400px;
  background:radial-gradient(circle, rgba(0,166,227,.06) 0%, transparent 70%);
  border-radius:50%;
  pointer-events:none;
}
.about-grid{
  display:grid;
  grid-template-columns:1.2fr 1fr;
  gap:60px;
  align-items:center;
}
.about-text .lead{
  font-size:17px;line-height:1.95;
  color:var(--c-text);
  margin-bottom:18px;
}
.about-text .lead strong{color:var(--c-accent);font-weight:600}
.about-text>p{color:var(--c-muted);margin-bottom:18px}
.about-ticks{
  margin-top:24px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px 24px;
}
.about-ticks li{
  position:relative;
  padding-left:28px;
  font-size:14px;
  color:var(--c-text);
  line-height:1.6;
}
.about-ticks li::before{
  content:"";position:absolute;
  left:0;top:6px;
  width:18px;height:18px;
  background:linear-gradient(135deg, var(--c-accent), var(--c-accent-2));
  border-radius:50%;
}
.about-ticks li::after{
  content:"";
  position:absolute;
  left:5px;top:11px;
  width:8px;height:4px;
  border-left:2px solid #fff;
  border-bottom:2px solid #fff;
  transform:rotate(-45deg);
}

.timeline{
  position:relative;
  padding-left:36px;
}
.timeline::before{
  content:"";position:absolute;
  left:14px;top:8px;bottom:8px;
  width:2px;
  background:linear-gradient(to bottom, var(--c-accent), rgba(0,166,227,0));
}
.t-item{
  position:relative;
  margin-bottom:24px;
}
.t-dot{
  position:absolute;
  left:-29px;top:6px;
  width:14px;height:14px;
  border-radius:50%;
  background:#fff;
  border:3px solid var(--c-accent);
  box-shadow:0 0 0 4px rgba(0,166,227,.15);
}
.t-card{
  background:#fff;
  border:1px solid var(--c-line);
  border-radius:var(--radius-sm);
  padding:14px 18px;
  transition:transform .25s var(--ease), box-shadow .25s var(--ease);
}
.t-card:hover{transform:translateX(6px);box-shadow:var(--shadow-md);border-color:rgba(0,166,227,.3)}
.t-card b{
  display:inline-block;
  font-family:var(--font-serif);
  font-size:14px;
  color:var(--c-accent);
  font-weight:700;
  margin-right:12px;
  background:rgba(0,166,227,.08);
  padding:2px 10px;
  border-radius:99px;
}
.t-card span{font-size:14px;color:var(--c-muted)}

/* ============== Business ============== */
.business{padding:120px 0;background:var(--c-soft);position:relative}
.business::after{
  content:"";position:absolute;
  bottom:60px;left:-100px;width:380px;height:380px;
  background:radial-gradient(circle, rgba(0,166,227,.08) 0%, transparent 70%);
  border-radius:50%;
  pointer-events:none;
}
.business-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:28px;
}
.biz-card{
  background:#fff;
  border-radius:var(--radius-md);
  padding:40px 32px;
  box-shadow:var(--shadow-sm);
  border:1px solid var(--c-line);
  transition:transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
  position:relative;
  overflow:hidden;
}
.biz-card::before{
  content:"";position:absolute;
  top:0;left:0;width:100%;height:4px;
  background:linear-gradient(90deg, var(--c-accent), var(--c-accent-2));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .4s var(--ease);
}
.biz-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:rgba(0,166,227,.3)}
.biz-card:hover::before{transform:scaleX(1)}
.biz-card.featured{
  background:linear-gradient(160deg, var(--c-primary) 0%, var(--c-primary-2) 100%);
  color:#fff;
  border-color:transparent;
  box-shadow:0 16px 40px rgba(10,37,64,.25);
  position:relative;
}
.biz-card.featured::after{
  content:"推荐";
  position:absolute;
  top:16px;right:16px;
  background:var(--c-warn);
  color:#fff;
  font-size:11px;
  font-weight:600;
  padding:3px 10px;
  border-radius:99px;
  letter-spacing:.05em;
}
.biz-card.featured::before{background:linear-gradient(90deg, var(--c-warn), #FFA07A)}
.biz-icon{
  width:64px;height:64px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(0,166,227,.08);
  color:var(--c-accent);
  border-radius:var(--radius-md);
  margin-bottom:24px;
  transition:transform .3s var(--ease);
}
.biz-card.featured .biz-icon{background:rgba(255,255,255,.1);color:#fff}
.biz-card:hover .biz-icon{transform:rotate(-8deg) scale(1.05)}
.biz-card h3{
  font-family:var(--font-serif);
  font-size:22px;
  font-weight:700;
  margin-bottom:10px;
  color:inherit;
}
.biz-card p{
  font-size:14px;
  color:var(--c-muted);
  margin-bottom:20px;
}
.biz-card.featured p{color:rgba(255,255,255,.75)}
.biz-card ul{
  border-top:1px solid var(--c-line);
  padding-top:18px;
}
.biz-card.featured ul{border-top-color:rgba(255,255,255,.12)}
.biz-card li{
  font-size:13.5px;
  padding:6px 0;
  color:var(--c-text);
  position:relative;
  padding-left:20px;
}
.biz-card.featured li{color:rgba(255,255,255,.85)}
.biz-card li::before{
  content:"▸";
  position:absolute;left:0;
  color:var(--c-accent);
  font-weight:700;
}
.biz-card.featured li::before{color:var(--c-accent-2)}

/* ============== Divisions ============== */
.divisions{padding:120px 0;background:var(--c-bg)}
.div-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:24px;
}
.div-card{
  position:relative;
  background:#fff;
  border:1px solid var(--c-line);
  border-radius:var(--radius-md);
  padding:36px 30px 30px;
  transition:transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
  overflow:hidden;
}
.div-card::before{
  content:"";position:absolute;
  inset:0;
  border-radius:var(--radius-md);
  padding:1px;
  background:linear-gradient(135deg, var(--c-accent), transparent 50%);
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;
  mask-composite:exclude;
  opacity:0;
  transition:opacity .3s var(--ease);
  pointer-events:none;
}
.div-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:transparent}
.div-card:hover::before{opacity:1}
.div-num{
  font-family:var(--font-mono);
  font-size:36px;
  font-weight:700;
  background:linear-gradient(135deg, var(--c-accent) 0%, var(--c-accent-2) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  display:inline-block;
  line-height:1;
  margin-bottom:16px;
  letter-spacing:-.02em;
}
.div-card h3{
  font-family:var(--font-serif);
  font-size:20px;
  font-weight:700;
  color:var(--c-primary);
  margin-bottom:12px;
}
.div-card p{
  font-size:14px;
  color:var(--c-muted);
  line-height:1.85;
}

/* ============== Products ============== */
.products{padding:120px 0;background:var(--c-soft)}
.product-grid{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:20px;
}
.product-card{
  background:#fff;
  border-radius:var(--radius-md);
  overflow:hidden;
  border:1px solid var(--c-line);
  cursor:pointer;
  transition:transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
  display:flex;flex-direction:column;
}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(0,166,227,.35)}
.product-img{
  position:relative;
  width:100%;
  aspect-ratio:4/3;
  background:var(--c-soft-2);
  overflow:hidden;
}
.product-img img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s var(--ease);
}
.product-card:hover .product-img img{transform:scale(1.06)}
.product-img::after{
  content:"点击查看大图";
  position:absolute;
  inset:0;
  background:linear-gradient(to top, rgba(10,37,64,.6) 0%, transparent 50%);
  color:#fff;
  display:flex;align-items:flex-end;justify-content:center;
  font-size:12px;
  padding-bottom:14px;
  opacity:0;
  transition:opacity .3s var(--ease);
  font-weight:500;
  letter-spacing:.05em;
}
.product-card:hover .product-img::after{opacity:1}
.product-body{
  padding:16px 18px 18px;
  display:flex;flex-direction:column;gap:10px;
  flex:1;
}
.product-body h4{
  font-family:var(--font-serif);
  font-size:16px;
  font-weight:600;
  color:var(--c-primary);
  line-height:1.4;
}
.product-body p{
  font-size:12.5px;
  color:var(--c-muted);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
  flex:1;
}
.product-foot{
  display:flex;align-items:center;justify-content:space-between;
  padding-top:10px;
  border-top:1px dashed var(--c-line);
  margin-top:auto;
}
.price-badge{
  font-size:12px;
  font-weight:600;
  color:var(--c-warn);
  background:rgba(255,107,53,.1);
  padding:4px 10px;
  border-radius:99px;
  letter-spacing:.05em;
}
.product-zoom{
  font-size:12px;
  color:var(--c-accent);
  font-weight:500;
  display:inline-flex;align-items:center;gap:3px;
}
.product-zoom svg{transition:transform .25s var(--ease)}
.product-card:hover .product-zoom svg{transform:translate(2px,-2px)}

/* ============== Applications ============== */
.applications{padding:120px 0;background:var(--c-bg)}
.app-grid{
  display:grid;
  grid-template-columns:repeat(7, 1fr);
  gap:16px;
}
.app-card{
  background:#fff;
  border:1px solid var(--c-line);
  border-radius:var(--radius-md);
  padding:24px 16px;
  text-align:center;
  transition:transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease), background .3s var(--ease);
  cursor:default;
}
.app-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-md);
  border-color:var(--c-accent);
  background:linear-gradient(180deg, #fff 0%, rgba(0,166,227,.04) 100%);
}
.app-ico{
  display:inline-flex;align-items:center;justify-content:center;
  width:48px;height:48px;
  font-size:24px;
  background:linear-gradient(135deg, rgba(0,166,227,.1), rgba(0,166,227,.02));
  border-radius:50%;
  margin-bottom:12px;
  transition:transform .3s var(--ease);
}
.app-card:hover .app-ico{transform:rotate(-10deg) scale(1.1)}
.app-card b{
  display:block;
  font-family:var(--font-serif);
  font-size:15px;
  font-weight:600;
  color:var(--c-primary);
  margin-bottom:4px;
}
.app-card small{
  font-size:11.5px;
  color:var(--c-muted);
  line-height:1.5;
  display:block;
}

/* ============== Cases ============== */
.cases{padding:120px 0;background:var(--c-primary);color:#fff;position:relative;overflow:hidden}
.cases::before{
  content:"";position:absolute;
  inset:0;
  background:
    radial-gradient(800px 400px at 20% 20%, rgba(0,166,227,.15) 0%, transparent 60%),
    radial-gradient(600px 300px at 80% 80%, rgba(51,214,255,.1) 0%, transparent 60%);
  pointer-events:none;
}
.cases .section-head h2{color:#fff}
.cases .section-head p{color:rgba(255,255,255,.7)}
.case-marquee{
  margin:30px 0 40px;
  overflow:hidden;
  mask-image:linear-gradient(to right, transparent, #000 5%, #000 95%, transparent);
  -webkit-mask-image:linear-gradient(to right, transparent, #000 5%, #000 95%, transparent);
}
.case-track{
  display:flex;gap:24px;
  animation:scroll 35s linear infinite;
  width:max-content;
}
.case-tag{
  display:inline-block;
  padding:14px 28px;
  background:rgba(255,255,255,.08);
  border:1px solid rgba(0,166,227,.3);
  border-radius:99px;
  font-family:var(--font-serif);
  font-size:16px;
  font-weight:600;
  letter-spacing:.05em;
  color:#fff;
  white-space:nowrap;
  transition:background .2s var(--ease);
}
.case-tag:hover{background:rgba(0,166,227,.2)}
.case-desc{
  max-width:880px;
  margin:0 auto;
  text-align:center;
  font-size:15px;
  line-height:1.95;
  color:rgba(255,255,255,.78);
}

/* ============== Strength ============== */
.strength{padding:120px 0;background:var(--c-soft)}
.str-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:24px;
}
.str-card{
  background:#fff;
  border-radius:var(--radius-md);
  padding:40px 32px;
  border:1px solid var(--c-line);
  transition:transform .3s var(--ease), box-shadow .3s var(--ease);
  position:relative;
}
.str-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.str-num{
  font-family:var(--font-mono);
  font-size:48px;
  font-weight:700;
  color:rgba(0,166,227,.12);
  position:absolute;
  top:20px;right:28px;
  line-height:1;
  letter-spacing:-.04em;
}
.str-card h3{
  font-family:var(--font-serif);
  font-size:22px;
  font-weight:700;
  color:var(--c-primary);
  margin-bottom:14px;
  padding-bottom:14px;
  border-bottom:2px solid var(--c-accent);
  display:inline-block;
}
.str-card p{
  font-size:14.5px;
  color:var(--c-muted);
  line-height:1.85;
  margin-bottom:12px;
}
.str-card p b{color:var(--c-accent);font-weight:600}
.str-card ul{
  margin-top:12px;
  display:flex;flex-direction:column;gap:8px;
}
.str-card li{
  font-size:13.5px;
  color:var(--c-text);
  padding-left:22px;
  position:relative;
}
.str-card li::before{
  content:"";position:absolute;
  left:0;top:9px;
  width:6px;height:6px;
  background:var(--c-accent);
  border-radius:50%;
}

/* ============== Market ============== */
.market{padding:120px 0;background:var(--c-bg)}
.mkt-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:28px;
}
.mkt-card{
  background:linear-gradient(160deg, var(--c-soft) 0%, #fff 100%);
  border-radius:var(--radius-lg);
  padding:40px 36px;
  border:1px solid var(--c-line);
  transition:transform .3s var(--ease), box-shadow .3s var(--ease);
  position:relative;
  overflow:hidden;
}
.mkt-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.mkt-card::before{
  content:"";position:absolute;
  top:-60px;right:-60px;
  width:200px;height:200px;
  background:radial-gradient(circle, rgba(0,166,227,.1) 0%, transparent 70%);
  border-radius:50%;
}
.mkt-flag{
  display:inline-block;
  padding:6px 16px;
  background:linear-gradient(135deg, var(--c-primary), var(--c-primary-2));
  color:#fff;
  font-family:var(--font-serif);
  font-size:14px;
  font-weight:600;
  letter-spacing:.1em;
  border-radius:99px;
  margin-bottom:18px;
}
.mkt-flag.alt{background:linear-gradient(135deg, var(--c-accent), var(--c-warn))}
.mkt-card h3{
  font-family:var(--font-serif);
  font-size:24px;
  font-weight:700;
  color:var(--c-primary);
  margin-bottom:12px;
}
.mkt-card>p{
  font-size:14.5px;
  color:var(--c-muted);
  line-height:1.85;
  margin-bottom:24px;
}
.mkt-tags{
  display:flex;flex-wrap:wrap;gap:8px;
}
.mkt-tags span{
  font-size:12.5px;
  padding:6px 12px;
  background:#fff;
  border:1px solid var(--c-line);
  border-radius:6px;
  color:var(--c-text);
  transition:all .2s var(--ease);
}
.mkt-tags span:hover{border-color:var(--c-accent);color:var(--c-accent);background:rgba(0,166,227,.04)}

/* ============== FAQ ============== */
.faq{padding:120px 0;background:var(--c-soft)}
.faq-list{
  max-width:900px;
  margin:0 auto;
  display:flex;flex-direction:column;gap:12px;
}
.faq-item{
  background:#fff;
  border:1px solid var(--c-line);
  border-radius:var(--radius-md);
  overflow:hidden;
  transition:border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.faq-item.open{
  border-color:rgba(0,166,227,.35);
  box-shadow:var(--shadow-md);
}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 24px;
  font-family:var(--font-serif);
  font-size:16px;
  font-weight:600;
  color:var(--c-primary);
  text-align:left;
  gap:16px;
  line-height:1.5;
}
.faq-q:hover{background:var(--c-soft)}
.faq-q .ico{
  flex-shrink:0;
  width:32px;height:32px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(0,166,227,.08);
  color:var(--c-accent);
  border-radius:50%;
  transition:transform .3s var(--ease), background .3s var(--ease);
}
.faq-item.open .faq-q .ico{transform:rotate(45deg);background:var(--c-accent);color:#fff}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .4s var(--ease);
}
.faq-a-inner{
  padding:0 24px 22px;
  font-size:14.5px;
  line-height:1.95;
  color:var(--c-muted);
  border-top:1px dashed var(--c-line);
  padding-top:16px;
  margin-top:0;
}
.faq-item.open .faq-a{max-height:600px}

/* ============== Links ============== */
.links{padding:80px 0;background:var(--c-bg);border-top:1px solid var(--c-line)}
.link-list{
  display:flex;flex-wrap:wrap;justify-content:center;
  gap:12px;
  max-width:900px;
  margin:0 auto;
}
.link-list li a{
  display:inline-block;
  padding:10px 22px;
  font-size:14px;
  color:var(--c-muted);
  background:var(--c-soft);
  border-radius:99px;
  border:1px solid transparent;
  transition:all .25s var(--ease);
}
.link-list li a:hover{
  color:var(--c-accent);
  background:#fff;
  border-color:var(--c-accent);
  transform:translateY(-2px);
  box-shadow:var(--shadow-sm);
}

/* ============== Contact ============== */
.contact{padding:120px 0;background:var(--c-soft)}
.ct-grid{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:20px;
}
.ct-card{
  background:#fff;
  border-radius:var(--radius-md);
  padding:30px 24px;
  border:1px solid var(--c-line);
  text-align:center;
  transition:transform .3s var(--ease), box-shadow .3s var(--ease);
  display:flex;flex-direction:column;align-items:center;
}
.ct-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.ct-card-hot{
  background:linear-gradient(160deg, #fff 0%, rgba(255,107,53,.04) 100%);
  border-color:rgba(255,107,53,.2);
}
.ct-card-qr{padding:20px 16px}
.ct-card-wide{grid-column:span 4}
.ct-ico{
  width:56px;height:56px;
  display:flex;align-items:center;justify-content:center;
  font-size:26px;
  background:linear-gradient(135deg, rgba(0,166,227,.1), rgba(0,166,227,.02));
  border-radius:50%;
  margin-bottom:14px;
}
.ct-card h3{
  font-family:var(--font-serif);
  font-size:15px;
  font-weight:600;
  color:var(--c-muted);
  margin-bottom:10px;
}
.ct-card p{
  font-family:var(--font-serif);
  font-size:18px;
  font-weight:700;
  color:var(--c-primary);
  line-height:1.4;
  margin-bottom:6px;
}
.ct-card p a{color:var(--c-accent);transition:color .2s var(--ease)}
.ct-card p a:hover{color:var(--c-warn)}
.ct-card small{font-size:12.5px;color:var(--c-muted)}
.qr-trigger{
  display:flex;flex-direction:column;align-items:center;gap:6px;
  padding:0;
  background:none;
}
.qr-trigger img{
  width:120px;height:120px;
  border-radius:8px;
  border:1px solid var(--c-line);
  transition:transform .3s var(--ease);
}
.qr-trigger:hover img{transform:scale(1.04)}
.qr-trigger span{
  font-size:12px;
  color:var(--c-accent);
  font-weight:500;
}

/* ============== Footer ============== */
.site-footer{
  background:linear-gradient(180deg, #061A2E 0%, #03101E 100%);
  color:rgba(255,255,255,.7);
  padding:60px 0 24px;
  font-size:14px;
}
.ft-top{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.4fr;
  gap:40px;
  padding-bottom:36px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.ft-brand p{
  font-size:13.5px;
  line-height:1.85;
  color:rgba(255,255,255,.55);
  margin-top:14px;
}
.ft-brand .brand-text{font-size:18px;color:#fff}
.ft-brand .brand-name{
  background:linear-gradient(135deg, #33d6ff 0%, #00A6E3 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.ft-col h4{
  font-family:var(--font-serif);
  font-size:15px;
  font-weight:600;
  color:#fff;
  margin-bottom:18px;
  position:relative;
  padding-bottom:10px;
}
.ft-col h4::after{
  content:"";position:absolute;
  left:0;bottom:0;
  width:24px;height:2px;
  background:var(--c-accent);
}
.ft-col ul{display:flex;flex-direction:column;gap:8px}
.ft-col li, .ft-col a{
  font-size:13.5px;
  color:rgba(255,255,255,.6);
  line-height:1.7;
  transition:color .2s var(--ease);
}
.ft-col a:hover{color:var(--c-accent-2)}
.ft-bottom{
  padding-top:20px;
  display:flex;flex-direction:column;align-items:center;gap:8px;
  text-align:center;
}
.ft-bottom p{font-size:12.5px;color:rgba(255,255,255,.45)}
.ft-bottom a{color:rgba(255,255,255,.65)}
.ft-bottom a:hover{color:var(--c-accent-2)}

/* ============== Modal ============== */
.modal{
  position:fixed;inset:0;z-index:1000;
  display:flex;align-items:center;justify-content:center;
  padding:24px;
  opacity:0;visibility:hidden;
  transition:opacity .25s var(--ease), visibility .25s var(--ease);
}
.modal.open{opacity:1;visibility:visible}
.modal-mask{
  position:absolute;inset:0;
  background:rgba(10,37,64,.78);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}
.modal-card{
  position:relative;
  background:#fff;
  border-radius:var(--radius-lg);
  max-width:760px;width:100%;
  max-height:90vh;
  display:flex;flex-direction:column;
  overflow:hidden;
  transform:scale(.95);
  transition:transform .3s var(--ease);
  box-shadow:0 30px 80px rgba(0,0,0,.4);
}
.modal.open .modal-card{transform:scale(1)}
.modal-close{
  position:absolute;
  top:14px;right:14px;
  width:36px;height:36px;
  background:rgba(255,255,255,.9);
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  color:var(--c-primary);
  z-index:2;
  transition:background .2s var(--ease), transform .2s var(--ease);
}
.modal-close:hover{background:#fff;transform:rotate(90deg)}
.modal-img{
  width:100%;
  aspect-ratio:16/10;
  background:var(--c-soft-2);
  overflow:hidden;
}
.modal-img img{width:100%;height:100%;object-fit:cover}
.modal-body{padding:28px 32px 32px}
.modal-body h3{
  font-family:var(--font-serif);
  font-size:24px;
  font-weight:700;
  color:var(--c-primary);
  margin-bottom:12px;
}
.modal-body p{
  font-size:14.5px;
  color:var(--c-muted);
  line-height:1.95;
  margin-bottom:24px;
}
.modal-foot{
  display:flex;align-items:center;justify-content:space-between;
  padding-top:20px;
  border-top:1px solid var(--c-line);
}
.modal-foot .price-badge{font-size:14px;padding:6px 14px}
.modal-card-qr{
  max-width:420px;
  padding:32px;
  align-items:center;
  text-align:center;
}
.modal-card-qr img{
  width:300px;height:300px;
  border-radius:8px;
  border:1px solid var(--c-line);
  margin-bottom:16px;
}
.modal-card-qr p{
  font-family:var(--font-serif);
  font-size:16px;
  font-weight:600;
  color:var(--c-primary);
}
body.modal-open{overflow:hidden}

/* ============== Floater ============== */
.floater{
  position:fixed;
  right:20px;bottom:20px;
  z-index:90;
  display:flex;flex-direction:column;gap:10px;
}
.floater-btn{
  width:54px;height:54px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:2px;
  background:#fff;
  border-radius:50%;
  box-shadow:0 6px 20px rgba(10,37,64,.15);
  color:var(--c-primary);
  font-size:11px;
  font-weight:500;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), color .2s var(--ease);
  cursor:pointer;
  text-decoration:none;
}
.floater-btn:hover{transform:translateY(-3px);box-shadow:0 10px 28px rgba(10,37,64,.2);color:var(--c-accent)}
.floater-btn span{font-size:11px;line-height:1}

/* ============== Reveal Animation ============== */
[data-reveal]{
  opacity:0;
  transform:translateY(28px);
  transition:opacity .7s var(--ease), transform .7s var(--ease);
}
[data-reveal].visible{
  opacity:1;
  transform:translateY(0);
}

/* ============== Responsive ============== */
@media (max-width: 1100px){
  .product-grid{grid-template-columns:repeat(3, 1fr)}
  .app-grid{grid-template-columns:repeat(5, 1fr)}
  .ft-top{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:28px}
}
@media (max-width: 960px){
  :root{--hd-h:64px}
  .nav-toggle{display:flex}
  .primary-nav{
    position:fixed;
    top:var(--hd-h);right:0;
    width:280px;height:calc(100vh - var(--hd-h));
    background:#fff;
    flex-direction:column;
    align-items:stretch;
    padding:24px;
    box-shadow:-10px 0 30px rgba(0,0,0,.1);
    transform:translateX(100%);
    transition:transform .3s var(--ease);
    overflow-y:auto;
  }
  .primary-nav.open{transform:translateX(0)}
  .primary-nav>ul{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin-right:0;
    margin-bottom:20px;
  }
  .primary-nav>ul a{
    display:block;
    padding:14px 16px;
    color:var(--c-text) !important;
    border-bottom:1px solid var(--c-line);
    border-radius:0;
  }
  .primary-nav>ul a::after{display:none}
  .nav-cta{justify-content:center;width:100%}

  .about-grid{grid-template-columns:1fr;gap:40px}
  .business-grid,.div-grid,.str-grid{grid-template-columns:1fr 1fr}
  .product-grid{grid-template-columns:repeat(2, 1fr)}
  .app-grid{grid-template-columns:repeat(4, 1fr)}
  .ct-grid{grid-template-columns:1fr 1fr}
  .ct-card-wide{grid-column:span 2}
  .mkt-grid{grid-template-columns:1fr}
  .ft-top{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width: 640px){
  .container{padding:0 18px}
  .hero{padding-top:calc(var(--hd-h) + 30px);padding-bottom:60px}
  .hero-stats{grid-template-columns:1fr 1fr;padding:18px;gap:10px}
  .hero-stats li{padding:6px 4px}
  .hero-stats li:nth-child(2){border-right:none}
  .hero-stats li:nth-child(1), .hero-stats li:nth-child(2){border-bottom:1px solid rgba(255,255,255,.08);padding-bottom:14px}
  .about-ticks{grid-template-columns:1fr}
  .section-head{margin-bottom:36px}
  .about,.business,.divisions,.products,.applications,.cases,.strength,.market,.faq,.contact{padding:80px 0}
  .business-grid,.div-grid,.str-grid,.product-grid{grid-template-columns:1fr}
  .app-grid{grid-template-columns:repeat(2, 1fr)}
  .ct-grid{grid-template-columns:1fr}
  .ct-card-wide{grid-column:span 1}
  .ft-top{grid-template-columns:1fr;gap:24px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{justify-content:center}
  .modal-card{max-height:85vh}
  .modal-body{padding:20px}
  .modal-card-qr img{width:240px;height:240px}
  .floater{right:12px;bottom:12px}
  .floater-btn{width:48px;height:48px}
  .case-tag{padding:10px 20px;font-size:14px}
  .mkt-tags span{font-size:11.5px;padding:4px 10px}
}