*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --white:#FFFFFF;--silver:#F2F3F4;--pale-blue:#E3F2FD;
  --data-blue:#42A5F5;--data-blue-light:#90CAF9;--light-mint:#E0F2F1;--warm:#FFB74D;
  --data-purple:#9C27B0;--data-purple-dark:#7B1FA2;--pale-purple:#F3E5F5;
  --text-dark:#1E293B;--text-mid:#475569;--text-light:#64748B;
  --navy-dark:#0F172A;
  --radius:12px;--radius-sm:8px;--radius-lg:20px;
  --shadow-sm:0 2px 8px rgba(15,23,42,0.06);
  --shadow-md:0 4px 20px rgba(15,23,42,0.08);
  --shadow-lg:0 8px 32px rgba(15,23,42,0.12);
  --transition:0.3s cubic-bezier(0.4,0,0.2,1);
  /* typography scale */
  --text-xs:0.75rem;--text-sm:0.875rem;--text-base:1rem;
  --text-lg:1.125rem;--text-xl:1.25rem;--text-2xl:1.5rem;
  --text-3xl:2rem;--text-4xl:2.5rem;
  --lh-tight:1.25;--lh-normal:1.6;--lh-relaxed:1.75;
  --fw-light:300;--fw-normal:400;--fw-medium:500;--fw-semibold:600;--fw-bold:700;--fw-black:900;
  /* font families */
  --font-heading:'Noto Serif SC','SimSun','STSong',serif;
  --font-body:'Noto Sans SC','Microsoft YaHei','PingFang SC',system-ui,sans-serif;
}
html{scroll-behavior:smooth;font-size:16px;scroll-padding-top:100px}
/* page loader bar */
#page-loader{position:fixed;top:0;left:0;height:4px;background:var(--data-blue);z-index:10000;width:0;box-shadow:0 1px 8px rgba(66,165,245,0.4);transition:width .3s ease}
#page-loader.loading{width:80%;transition:width .8s cubic-bezier(0.1,0.7,0.3,1)}
#page-loader.done{width:100%;transition:width .4s ease;opacity:0}
/* page enter */
.page-enter{animation:pageIn .8s cubic-bezier(0.22,0.61,0.36,1)}
@keyframes pageIn{0%{opacity:0;transform:translateY(12px)}100%{opacity:1;transform:translateY(0)}}
body{font-family:var(--font-body);color:var(--text-dark);background:var(--white);overflow-x:hidden;line-height:var(--lh-relaxed);font-weight:var(--fw-normal);text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
h1,h2,h3,h4,.section-title,.page-header h1,.hero h1,.cat4-info h2,.cat-main h2,.prod-main h2,.prod-detail-body h1,.cat-sidebar h3,.prod-sidebar h3,.contact-form h3,.prod-subgroup-title,.prod-spec-card h3{font-family:var(--font-heading)}
html[lang="en"] body{font-family:'Segoe UI','Helvetica Neue',Arial,sans-serif}
a{text-decoration:none;color:inherit}ul{list-style:none}img{max-width:100%;display:block}

.dot-grid{
  background-image:radial-gradient(circle,rgba(66,165,245,0.15) .8px,transparent .8px);
  background-size:24px 24px;
}
@keyframes pulseRing{
  0%{transform:scale(1);opacity:1}
  100%{transform:scale(2.5);opacity:0}
}
.fade-up{
  opacity:0;transform:translateY(30px);
  transition:opacity .7s ease,transform .7s ease;
}
.fade-up.visible{opacity:1;transform:translateY(0)}
.fade-up.d1{transition-delay:.1s}
.fade-up.d2{transition-delay:.2s}
.fade-up.d3{transition-delay:.3s}
.fade-up.d4{transition-delay:.4s}
@keyframes gradientShift{
  0%,100%{background-position:0 0}
  50%{background-position:200% 0}
}

/* ===== NAV ===== */
nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,0.82);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-bottom:1px solid rgba(0,0,0,0.06);transition:all .3s}
nav.scrolled{box-shadow:0 4px 30px rgba(15,23,42,0.1);background:rgba(255,255,255,0.9)}
.nav-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 28px;height:72px}
.nav-logo{display:flex;align-items:center;gap:10px;font-family:var(--font-heading);font-weight:var(--fw-bold);font-size:var(--text-xl);color:var(--navy-dark)}
.nav-logo .logo-img{width:38px;height:38px;object-fit:contain}
.nav-links{display:flex;align-items:center;gap:6px;list-style:none}
.nav-links>li{position:relative}
.nav-links>li>a{display:block;padding:10px 20px;border-radius:8px;font-size:var(--text-base);color:var(--text-mid);font-weight:var(--fw-medium);transition:all .2s;cursor:pointer;position:relative}
.nav-links>li>a::before{content:'';position:absolute;bottom:0;left:18px;right:18px;height:2px;background:var(--data-blue);transform:scaleX(0);transition:transform .25s}
.nav-links>li>a:hover,.nav-links>li>a.active{color:var(--data-blue);background:none}
.nav-links>li>a:hover::before,.nav-links>li>a.active::before{transform:scaleX(1)}
.nav-links:hover>li>a.active::before{transform:scaleX(0)}
.nav-links>li:hover>a.active::before{transform:scaleX(1)}
.nav-highlight{font-weight:var(--fw-semibold)}
.nav-lang-wrap{display:flex;align-items:center;margin-left:2px}
.nav-lang{display:flex;align-items:center;gap:0}
.lang-btn{background:none;border:none;font-family:inherit;font-size:var(--text-sm);color:var(--text-light);cursor:pointer;padding:4px 8px;border-radius:0;transition:color .2s;font-weight:var(--fw-medium);position:relative}
.lang-btn::before{content:'';position:absolute;bottom:0;left:4px;right:4px;height:2px;background:var(--data-blue);transform:scaleX(0);transition:transform .25s}
.lang-btn:hover{color:var(--data-blue);background:none}
.lang-btn.active{color:var(--data-blue);font-weight:var(--fw-medium)}
.lang-btn.active::before,.lang-btn:hover::before{transform:scaleX(1)}
.lang-div{color:rgba(0,0,0,0.12);font-size:var(--text-sm);user-select:none}
.nav-links>li.has-dropdown>a::after{content:'';display:inline-block;width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;margin-left:6px;vertical-align:middle;opacity:.4;transition:opacity .2s}
.nav-links>li.has-dropdown:hover>a::after{opacity:.8}
.nav-dropdown{position:absolute;top:100%;left:0;min-width:170px;background:#fff;border-radius:12px;box-shadow:0 12px 40px rgba(15,23,42,0.12);border:1px solid rgba(0,0,0,0.06);padding:8px 0;opacity:0;visibility:hidden;transform:translateY(8px);transition:all .25s ease;list-style:none;z-index:1001}
.nav-links>li:hover .nav-dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.nav-dropdown a{display:block;padding:10px 22px;font-size:var(--text-base);color:var(--text-mid);border-radius:0;white-space:nowrap;transition:all .15s;position:relative}
.nav-dropdown a::before{content:'';position:absolute;bottom:4px;left:22px;right:22px;height:2px;background:var(--data-blue);transform:scaleX(0);transition:transform .25s}
.nav-dropdown a:hover{color:var(--data-blue);background:none}
.nav-dropdown a:hover::before{transform:scaleX(1)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--data-blue);border-radius:2px;transition:all .3s}
.nav-links.open{display:flex}

/* ===== HERO (homepage only) ===== */
.hero{position:relative;min-height:100vh;display:flex;flex-direction:column;justify-content:flex-start;overflow:hidden;padding-top:190px}
.hero-bg{position:absolute;inset:0;background-image:radial-gradient(circle,#B0BEC5 1px,transparent 1px);background-size:28px 28px;opacity:.3;animation:heroDotShift 60s linear infinite}
@keyframes heroDotShift{0%{background-position:0 0}100%{background-position:500px 500px}}
.hero-flow{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.hero-flow .line{position:absolute;height:1px;background:linear-gradient(90deg,transparent,var(--data-blue),transparent);opacity:.25;animation:heroLineFlow 8s linear infinite}
.hero-flow .line:nth-child(1){top:22%;width:40%;left:5%;animation-duration:7s}
.hero-flow .line:nth-child(2){top:46%;width:55%;left:30%;animation-duration:9s;animation-delay:1s}
.hero-flow .line:nth-child(3){top:70%;width:35%;left:55%;animation-duration:6s;animation-delay:2s}
.hero-flow .line:nth-child(4){top:36%;width:30%;left:10%;animation-duration:10s;animation-delay:3s}
.hero-flow .line:nth-child(5){top:80%;width:50%;left:20%;animation-duration:8s;animation-delay:.5s}
.hero-flow .line:nth-child(6){top:56%;width:45%;left:40%;animation-duration:11s;animation-delay:1.5s}
.hero-flow .line:nth-child(7){top:92%;width:55%;left:25%;animation-duration:8s;animation-delay:2.5s}
@keyframes heroLineFlow{0%{opacity:0;transform:translateX(-100%)}50%{opacity:.3}100%{opacity:0;transform:translateX(100%)}}
.hero-content{position:relative;z-index:2;max-width:1200px;margin:0 auto;padding:0 24px;text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:var(--pale-blue);color:var(--data-blue);font-size:var(--text-base);font-weight:var(--fw-medium);padding:6px 18px;border-radius:20px;margin-bottom:24px;letter-spacing:0.04em}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--data-blue)}
.hero h1{font-family:var(--font-heading);font-size:clamp(2.2rem,5.5vw,4rem);font-weight:var(--fw-black);line-height:var(--lh-tight);margin-bottom:24px;color:var(--navy-dark);letter-spacing:-0.02em;text-wrap:balance}
.hero h1 span:first-child{color:var(--text-dark)}.hero h1 span:last-child{color:var(--data-blue)}
.hero-desc{font-size:var(--text-lg);color:var(--text-mid);margin:0 auto 12px;line-height:var(--lh-relaxed);font-weight:var(--fw-light);white-space:nowrap;text-align:center}
.hero-core{font-size:var(--text-base);color:var(--text-mid);margin:0 auto 36px;font-weight:var(--fw-bold);text-align:center;white-space:nowrap}
.hero-core-link{color:var(--data-blue);font-weight:var(--fw-semibold);transition:color .2s}
.hero-core-link::after{content:'\2197';font-size:0.7em;margin-left:2px;opacity:0.5;vertical-align:super}
.hero-core-link:hover{color:#1E88E5}
.hero-core-link:hover::after{opacity:1}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:6px;padding:14px 32px;border-radius:50px;font-size:var(--text-sm);font-weight:var(--fw-medium);transition:all .3s}
.btn-primary{background:var(--data-blue);color:#fff;box-shadow:0 4px 20px rgba(66,165,245,.3)}
.btn-primary:hover{background:#1E88E5;transform:translateY(-2px);box-shadow:0 6px 28px rgba(66,165,245,.4)}
.btn-outline{background:transparent;color:var(--data-blue);border:1.5px solid var(--data-blue)}
.btn-outline:hover{background:var(--pale-blue);transform:translateY(-2px)}

/* ===== CLOUD SECTION (homepage only) ===== */
#nrscloud{padding:80px 0;background:linear-gradient(180deg,var(--white) 0%,rgba(66,165,245,0.04) 100%)}
.cloud-section{max-width:1100px;margin:0 auto;padding:0 32px;display:grid;grid-template-columns:560px 1fr;gap:60px;align-items:center}
.cloud-visual{display:flex;align-items:center;justify-content:center}
.cloud-content h2{font-family:var(--font-heading);font-size:var(--text-3xl);font-weight:var(--fw-black);color:var(--navy-dark);margin-bottom:16px;letter-spacing:-0.02em}
.cloud-content>p{font-size:var(--text-base);color:var(--text-mid);line-height:var(--lh-relaxed);margin-bottom:24px;max-width:600px}
.cloud-features{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:28px}
.cloud-feat{display:flex;align-items:center;gap:8px;font-size:var(--text-sm);color:var(--text-dark);font-weight:var(--fw-medium);padding:8px 0}
.cloud-feat svg{width:18px;height:18px;stroke:var(--data-blue);flex-shrink:0}
@media(max-width:768px){
  .cloud-section{grid-template-columns:1fr;gap:32px;text-align:center}
  .cloud-visual img{width:200px;height:auto}
  .cloud-content>p{max-width:none}
  .cloud-features{grid-template-columns:1fr;justify-items:center}
}

/* ===== PAGE HEADER (inner pages) ===== */
.page-header{position:relative;padding:100px 24px 45px;text-align:center;background:linear-gradient(180deg,var(--silver) 0%,var(--white) 100%);overflow:hidden}
.page-header::before{content:'';position:absolute;inset:0;background-image:radial-gradient(circle,rgba(66,165,245,0.06) 1px,transparent 1px);background-size:20px 20px;mask-image:linear-gradient(180deg,#000 40%,transparent 100%)}
.page-header h1{position:relative;font-size:clamp(2rem,5vw,3rem);font-weight:var(--fw-black);color:var(--navy-dark);margin-bottom:12px;letter-spacing:-0.02em;text-wrap:balance}
.page-header p{position:relative;color:var(--text-mid);font-size:var(--text-lg);font-weight:var(--fw-light);max-width:600px;margin:0 auto}
.breadcrumb{display:flex;justify-content:center;gap:8px;margin-top:16px;font-size:var(--text-xs);color:var(--text-light);position:relative}
.breadcrumb a{color:var(--data-blue)}
.breadcrumb span{color:var(--text-light)}

/* ===== HERO STATS ===== */
.hero-stats-row{position:absolute;bottom:48px;left:0;right:0;display:flex;justify-content:center;gap:160px;flex-wrap:wrap;z-index:2}
.hero-stat{display:flex;align-items:flex-start;gap:8px}
.hero-stat-dot{width:10px;height:10px;border-radius:50%;background:var(--data-blue);flex-shrink:0;margin-top:0.95em;position:relative}
.hero-stat-dot::after{content:'';position:absolute;width:100%;height:100%;border-radius:50%;border:2px solid var(--data-blue);animation:pulseRing 2.5s ease-out infinite}
.hero-stat-body{display:flex;flex-direction:column}
.hero-stat-num{display:flex;align-items:baseline;gap:4px}
.hero-stat-num .num{font-family:var(--font-heading);font-size:1.7rem;font-weight:var(--fw-black);color:var(--navy-dark);line-height:1;letter-spacing:-0.03em}
.hero-stat-num .unit{font-size:var(--text-2xl);font-weight:var(--fw-bold);color:var(--data-blue)}
.hero-stat-label{font-size:var(--text-xs);color:var(--text-light);font-weight:var(--fw-medium);letter-spacing:0.04em}

/* ===== ABOUT ===== */
.about{padding:100px 0 100px;background:var(--white)}
.about-container{max-width:1100px;margin:0 auto;padding:0 32px}
.section-tag{display:block;text-align:center;font-size:var(--text-xs);letter-spacing:0.18em;text-transform:uppercase;color:var(--data-blue);margin-bottom:16px;font-weight:var(--fw-semibold)}
.section-title{font-family:var(--font-heading);text-align:center;font-size:clamp(2rem,4.5vw,2.8rem);font-weight:var(--fw-black);margin-bottom:16px;color:var(--navy-dark);letter-spacing:-0.02em;text-wrap:balance}
.section-sub{text-align:center;color:var(--text-light);margin-bottom:64px;font-size:var(--text-lg);font-weight:var(--fw-light);line-height:var(--lh-normal);max-width:560px;margin-left:auto;margin-right:auto}

/* brand statement - large manifesto text */
.about-statement{max-width:800px;margin:0 auto 48px;text-align:left}
.about-statement p{font-size:var(--text-xl);font-weight:var(--fw-medium);line-height:var(--lh-relaxed);color:var(--text-dark);letter-spacing:-0.01em;max-width:720px;margin-left:auto;margin-right:auto}
.about-statement .hl{color:var(--data-blue);font-weight:var(--fw-bold)}

/* about detail */
.about-detail{max-width:900px;margin:0 auto 56px}
.about-detail p{font-size:var(--text-base);line-height:var(--lh-relaxed);color:var(--text-mid);text-align:left}
.hl{color:var(--data-blue);font-weight:var(--fw-semibold)}

/* 4-capability grid */
.about-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:40px}
.about-item{display:flex;align-items:flex-start;gap:20px;padding:36px 28px;border-radius:var(--radius);border:1px solid rgba(0,0,0,0.05);box-shadow:var(--shadow-sm);background:var(--white);transition:all .3s}
.about-item:hover{box-shadow:var(--shadow-lg);border-color:rgba(66,165,245,0.15);transform:translateY(-3px)}
.about-num{flex-shrink:0;font-family:var(--font-heading);font-size:3.2rem;font-weight:var(--fw-black);color:rgba(66,165,245,0.08);line-height:1;letter-spacing:-2px;margin-top:-6px}
.about-item-text{flex:1}
.about-item h4{font-family:var(--font-heading);font-size:var(--text-base);font-weight:var(--fw-semibold);margin-bottom:8px;color:var(--navy-dark)}
.about-item p{font-size:var(--text-sm);color:var(--text-light);line-height:var(--lh-normal)}

/* CTA */
.about-cta{text-align:center;margin-top:16px}
.about-cta .arrow{display:inline-block;transition:transform .3s}
.about-cta a:hover .arrow{transform:translateX(4px)}

/* ===== SOLUTIONS ===== */
#solutions{padding:100px 0 100px;background:var(--silver)}
.solutions-container{max-width:1100px;margin:0 auto;padding:0 32px}
.sol-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:48px}
.sol-card{background:var(--white);border-radius:var(--radius-lg);padding:40px 32px;position:relative;overflow:hidden;transition:all .35s;border:1px solid rgba(0,0,0,0.05);box-shadow:var(--shadow-sm)}
.sol-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(66,165,245,0.15)}
.sol-card::after{content:'';position:absolute;top:-20px;right:-20px;width:60px;height:60px;background-image:radial-gradient(circle,rgba(66,165,245,0.06) 1px,transparent 1px);background-size:8px 8px;opacity:.6}
.sol-icon{width:52px;height:52px;border-radius:14px;background:rgba(66,165,245,0.08);display:flex;align-items:center;justify-content:center;margin-bottom:24px}
.sol-icon svg{width:26px;height:26px;stroke:var(--data-blue);stroke-width:1.5;fill:none}
.sol-card h3{font-family:var(--font-heading);font-size:var(--text-xl);font-weight:var(--fw-bold);margin-bottom:12px;color:var(--navy-dark);letter-spacing:-0.01em}
.sol-card p{font-size:var(--text-sm);color:var(--text-light);line-height:var(--lh-normal);margin-bottom:20px}
.sol-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.sol-tags span{padding:4px 12px;background:rgba(66,165,245,0.05);border-radius:6px;font-size:var(--text-xs);color:var(--data-blue);font-weight:var(--fw-medium)}
.sol-link{font-size:var(--text-sm);color:var(--data-blue);font-weight:var(--fw-semibold);display:inline-flex;align-items:center;gap:4px;transition:gap .2s}
.sol-link .arrow{display:inline-block;transition:transform .3s}
.sol-link:hover{gap:6px}
.sol-link:hover .arrow{transform:translateX(4px)}
.solutions-cta{text-align:center;margin-top:8px}
.solutions-cta .arrow{display:inline-block;transition:transform .3s}
.solutions-cta a:hover .arrow{transform:translateX(4px)}

/* ===== PRODUCTS ===== */
#products{padding:100px 0}
.prod-grid{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:0 32px}
.prod-card{background:var(--white);border-radius:var(--radius);padding:28px 20px 24px;text-align:center;border:1px solid rgba(0,0,0,0.05);box-shadow:var(--shadow-sm);transition:all .35s}
.prod-card:hover{box-shadow:var(--shadow-lg);border-color:rgba(66,165,245,0.15);transform:translateY(-4px)}
.prod-img{width:100%;height:140px;margin-bottom:16px;border-radius:var(--radius-sm);background:linear-gradient(135deg,rgba(66,165,245,0.04),rgba(224,242,241,0.2));display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}
.prod-img::after{content:'';position:absolute;inset:0;background-image:radial-gradient(circle,rgba(66,165,245,0.06) .5px,transparent .5px);background-size:14px 14px;opacity:.6;pointer-events:none}
.prod-img svg{position:relative;z-index:1;width:110px;height:92px}
.prod-card h3{font-family:var(--font-heading);font-size:var(--text-sm);font-weight:var(--fw-semibold);margin-bottom:6px}
.prod-card p{font-size:var(--text-xs);color:var(--text-light)}
.prod-more{text-align:center;margin-top:36px;color:var(--text-light);font-size:var(--text-sm)}

/* ===== CASES ===== */
#cases{padding:90px 0;background:var(--silver)}
.cases-wrapper{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:40px;padding:0 24px}
.cases-col h3{font-size:var(--text-lg);font-weight:var(--fw-semibold);margin-bottom:16px;display:flex;align-items:center;gap:10px}
.cases-col h3 .dot{width:10px;height:10px;border-radius:50%;background:var(--data-blue);position:relative}
.cases-col h3 .dot.pulse-dot::after{content:'';position:absolute;width:100%;height:100%;border-radius:50%;border:2px solid var(--data-blue);animation:pulseRing 2.5s ease-out infinite}
.cases-desc{color:var(--text-mid);font-size:var(--text-sm);line-height:var(--lh-relaxed);margin-bottom:16px}
.case-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.case-tag{padding:6px 14px;background:var(--white);border-radius:4px;font-size:var(--text-sm);color:var(--text-mid);border:1px solid rgba(66,165,245,0.1)}
.partner-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.partner-item{padding:10px 14px;background:var(--white);border-radius:4px;font-size:var(--text-sm);color:var(--text-mid);border:1px solid rgba(66,165,245,0.06)}
.service-list{display:flex;flex-direction:column;gap:14px}
.service-item{display:flex;align-items:flex-start;gap:14px;padding:16px;background:var(--white);border-radius:var(--radius);border:1px solid rgba(66,165,245,0.06)}
.service-num{width:28px;height:28px;border-radius:50%;background:rgba(66,165,245,0.08);display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700;color:var(--data-blue);flex-shrink:0}
.service-item p{font-size:var(--text-sm);color:var(--text-mid);line-height:var(--lh-normal)}

/* ===== DOWNLOADS ===== */
#downloads{padding:100px 0}
.dl-grid{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:0 32px}
.dl-card{background:var(--white);border-radius:var(--radius);padding:28px 24px;border:1px solid rgba(0,0,0,0.05);box-shadow:var(--shadow-sm);transition:all .35s;display:flex;align-items:flex-start;gap:16px}
.dl-card:hover{box-shadow:var(--shadow-lg);border-color:rgba(66,165,245,0.15);transform:translateY(-3px)}
.dl-icon{width:42px;height:42px;border-radius:10px;background:rgba(66,165,245,0.08);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.dl-icon svg{width:20px;height:20px;stroke:var(--data-blue);stroke-width:1.5;fill:none}
.dl-info h4{font-size:var(--text-sm);font-weight:var(--fw-semibold);margin-bottom:4px}
.dl-info p{font-size:var(--text-xs);color:var(--text-light);margin-bottom:10px}
.dl-info a,.dl-link{font-size:var(--text-xs);color:var(--data-blue);font-weight:var(--fw-medium);display:inline-flex;align-items:center;gap:4px;transition:gap .2s}
.dl-info a:hover,.dl-card:hover .dl-link{gap:8px}

/* ===== CONTACT ===== */
#contact{padding:100px 0}
.contact-grid{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:48px;padding:0 32px}
.contact-info{display:flex;flex-direction:column;gap:16px}
.info-item{display:flex;gap:16px;padding:20px;background:var(--white);border-radius:var(--radius);border:1px solid rgba(0,0,0,0.05);box-shadow:var(--shadow-sm);transition:all .3s}
.info-item:hover{border-color:rgba(66,165,245,0.2);box-shadow:var(--shadow-md);transform:translateY(-1px)}
.info-icon{width:40px;height:40px;border-radius:50%;background:rgba(66,165,245,0.06);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.info-icon svg{width:18px;height:18px;stroke:var(--data-blue);stroke-width:1.5;fill:none}
.info-item h4{font-size:var(--text-sm);font-weight:var(--fw-semibold);margin-bottom:4px}
.info-item p{font-size:var(--text-sm);color:var(--text-light)}
.contact-form{background:var(--white);border-radius:var(--radius-lg);padding:36px;border:1px solid rgba(66,165,245,0.1)}
.contact-form h3{font-size:var(--text-lg);font-weight:var(--fw-semibold);margin-bottom:20px}
.contact-reply-hint{font-size:var(--text-sm);font-weight:var(--fw-normal)}
.contact-form input,.contact-form select,.contact-form textarea{width:100%;padding:12px 16px;margin-bottom:14px;border:1px solid rgba(66,165,245,0.15);border-radius:var(--radius-sm);font-family:inherit;font-size:var(--text-sm);background:var(--white);color:var(--text-dark);outline:none;transition:border .2s}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{border-color:var(--data-blue)}
.contact-form textarea{resize:vertical;min-height:110px}
.contact-form .btn-full{width:100%;justify-content:center;border:none;cursor:pointer}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-feedback{display:none;padding:12px 16px;border-radius:var(--radius-sm);margin-top:12px;font-size:var(--text-sm);text-align:center}
.form-feedback.success{display:block;background:#e8f5e9;color:#2e7d32;border:1px solid #a5d6a7}
.form-feedback.error{display:block;background:#fbe9e7;color:#c62828;border:1px solid #ef9a9a}
.form-feedback.sending{display:block;background:rgba(66,165,245,0.06);color:var(--data-blue);border:1px solid rgba(66,165,245,0.2)}
.contact-form button:disabled{opacity:.65;cursor:not-allowed}

/* ===== CONTENT SECTION (inner pages) ===== */
.content-section{max-width:1500px;margin:0 auto;padding:45px 16px}
.content-section:has(.cat-page){max-width:none;padding:60px 0}
.content-section h2{font-family:var(--font-heading);font-size:var(--text-3xl);font-weight:var(--fw-black);color:var(--navy-dark);margin-bottom:24px;padding-bottom:16px;border-bottom:2px solid rgba(0,0,0,0.08);letter-spacing:-0.01em}
.content-section h3{font-family:var(--font-heading);font-size:var(--text-xl);font-weight:var(--fw-bold);color:var(--navy-dark);margin:36px 0 14px}
.content-section p{color:var(--text-mid);font-size:var(--text-base);line-height:var(--lh-relaxed);margin-bottom:20px}
.content-section ul,.content-section ol{padding-left:24px;margin-bottom:20px}
.content-section li{color:var(--text-mid);font-size:var(--text-base);line-height:var(--lh-relaxed);list-style:disc;margin-bottom:6px}
.content-section .highlight-box{padding:28px 32px;background:rgba(66,165,245,0.03);border-left:4px solid var(--data-blue);border-radius:0 var(--radius) var(--radius) 0;margin:32px 0}
.content-section .highlight-box p{font-size:var(--text-base);margin-bottom:8px;line-height:var(--lh-relaxed)}

/* ===== PRODUCT CATEGORY WITH SIDEBAR ===== */
.prod-page{max-width:1500px;margin:0 auto;padding:48px 16px;display:grid;grid-template-columns:280px 1fr;gap:32px}
.prod-sidebar{position:sticky;top:88px;align-self:start;background:var(--white);border-radius:var(--radius-lg);border:1px solid rgba(0,0,0,0.05);box-shadow:var(--shadow-sm);overflow:hidden}
.prod-sidebar-back{display:flex;align-items:center;gap:6px;padding:14px 20px;font-size:var(--text-sm);color:var(--text-light);border-bottom:1px solid rgba(0,0,0,0.06);transition:all .2s;text-decoration:none;font-weight:var(--fw-medium)}
.prod-sidebar-back:hover{color:var(--data-blue);background:rgba(66,165,245,0.04)}
.prod-sidebar-back::before{content:'';width:14px;height:14px;background:currentColor;mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M19 12H5M12 19l-7-7 7-7'/%3E%3C/svg%3E");mask-size:contain;mask-repeat:no-repeat;flex-shrink:0}
.prod-sidebar h3{font-family:var(--font-heading);font-size:var(--text-base);font-weight:var(--fw-bold);color:var(--navy-dark);padding:14px 20px 14px;margin:0}
.prod-sidebar ul{list-style:none;padding:8px}
.prod-sidebar li{margin:0}
.prod-sidebar a{display:flex;align-items:center;gap:10px;padding:10px 14px;font-size:var(--text-base);color:var(--text-mid);border-radius:10px;transition:all .2s;font-weight:var(--fw-medium)}
.prod-sidebar a:hover{color:var(--navy-dark);background:rgba(66,165,245,0.06)}
.prod-sidebar a.active{color:var(--data-blue);background:rgba(66,165,245,0.1);font-weight:var(--fw-semibold)}
.prod-sidebar a.active::before{content:'';width:4px;height:4px;border-radius:50%;background:var(--data-blue);flex-shrink:0}
.prod-main h2{font-family:var(--font-heading);font-size:var(--text-2xl);font-weight:var(--fw-bold);color:var(--navy-dark);margin-bottom:24px;letter-spacing:-0.01em}
.prod-card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.prod-card-item{background:var(--white);border-radius:var(--radius);border:1px solid rgba(0,0,0,0.05);box-shadow:var(--shadow-sm);overflow:hidden;transition:all .3s;cursor:pointer;display:block;text-decoration:none;color:inherit}
.prod-card-item:hover{box-shadow:var(--shadow-lg);border-color:rgba(66,165,245,0.15);transform:translateY(-3px)}
.prod-card-item-img{height:280px;display:flex;align-items:center;justify-content:center;background:var(--white);padding:32px;box-shadow:inset 0 0 40px rgba(0,0,0,0.04)}
.prod-card-item-img img{max-width:100%;max-height:220px;object-fit:contain;min-width:0}
.prod-card-img-large .prod-card-item-img{padding:8px}
.prod-card-img-large .prod-card-item-img img{max-height:264px}
.prod-card-item-body{padding:20px 24px;border-top:1px solid rgba(0,0,0,0.04)}
.prod-card-item-body h4{font-family:var(--font-heading);font-size:var(--text-base);font-weight:var(--fw-semibold);margin-bottom:4px;color:var(--navy-dark)}
.prod-card-item-body p{font-size:var(--text-sm);color:var(--text-light);line-height:var(--lh-normal);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ===== PRODUCT DETAIL PAGE ===== */
.prod-main .prod-detail-layout{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.prod-detail-gallery{display:flex;align-items:center;justify-content:center;background:var(--white);border-radius:var(--radius-lg);border:1px solid rgba(0,0,0,0.06);aspect-ratio:4/3;overflow:hidden;box-shadow:inset 0 0 40px rgba(0,0,0,0.04);scroll-margin-top:80px}
.prod-detail-gallery img{width:100%;height:100%;object-fit:contain;border-radius:var(--radius-lg)}
.prod-detail-body h1{font-size:var(--text-3xl);font-weight:var(--fw-bold);color:var(--navy-dark);margin-bottom:6px;letter-spacing:-0.02em;text-wrap:balance}
.prod-detail-body .prod-subtitle{display:none}
.prod-detail-body h3{font-size:var(--text-lg);font-weight:var(--fw-semibold);color:var(--navy-dark);margin:32px 0 12px;padding-bottom:10px;border-bottom:1px solid rgba(0,0,0,0.08)}
.prod-detail-body p,.prod-detail-body li{font-size:var(--text-base);color:var(--text-mid);line-height:var(--lh-relaxed);margin-bottom:10px}
.prod-detail-body ul{padding-left:20px;list-style:disc}
/* spec cards */
.prod-spec-card{margin:32px 0;padding:0;background:none;border-radius:0;border:none;box-shadow:none;overflow:visible}
.prod-spec-card h3{font-size:var(--text-lg);font-weight:var(--fw-semibold);color:var(--navy-dark);margin:32px 0 12px;padding:0 0 10px;border-bottom:1px solid rgba(0,0,0,0.08);background:none}
.prod-spec-img-wrap{background:rgba(66,165,245,0.02);border-radius:var(--radius-sm);padding:16px;text-align:center;overflow-x:auto;-webkit-overflow-scrolling:touch;margin:20px 28px}
.prod-spec-img{max-width:100%;height:auto;border-radius:4px;display:inline-block}
.prod-spec-text{font-size:var(--text-sm);color:var(--text-mid);line-height:var(--lh-relaxed);padding:0;margin:0}
.prod-spec-card table{width:100%;border-collapse:collapse;font-size:var(--text-base);margin:0}
.prod-spec-card thead th{background:var(--navy-dark);color:#fff;padding:12px 20px;font-size:var(--text-xs);font-weight:var(--fw-semibold);text-align:left;letter-spacing:0.04em}
.prod-spec-card td{padding:12px 20px;border-bottom:1px solid rgba(0,0,0,0.05);text-align:left;line-height:var(--lh-normal)}
.prod-spec-card td:first-child{font-weight:var(--fw-semibold);color:var(--navy-dark);background:rgba(66,165,245,0.02);width:35%}
.prod-spec-card td:last-child{color:var(--text-mid)}
.prod-spec-card tbody tr{transition:background .15s}
.prod-spec-card tbody tr:hover{background:rgba(66,165,245,0.03)}
.prod-spec-card tbody tr:nth-child(even){background:rgba(0,0,0,0.012)}
.prod-spec-card tbody tr:nth-child(even) td:first-child{background:rgba(66,165,245,0.04)}
.prod-spec-card tbody tr:nth-child(even):hover{background:rgba(66,165,245,0.05)}
@media(max-width:768px){.prod-main .prod-detail-layout{grid-template-columns:1fr;gap:20px}.prod-detail-gallery{aspect-ratio:auto;min-height:220px;max-height:320px;padding:20px}.prod-detail-body{text-align:left}.prod-detail-body h1{font-size:var(--text-2xl);text-align:left}}

/* ===== FOOTER ===== */
#footer{padding:40px 0 24px;background:var(--navy-dark);color:rgba(255,255,255,.7)}
.footer-inner{max-width:1100px;margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand .logo-img{width:32px;height:32px;object-fit:contain}
.footer-brand .name{font-size:var(--text-sm);font-weight:var(--fw-medium);color:rgba(255,255,255,.9);max-width:320px}
.footer-links{display:flex;gap:14px;flex-wrap:wrap}
.footer-links a{font-size:var(--text-xs);color:rgba(255,255,255,.5);transition:color .2s}
.footer-links a:hover{color:#fff}
.footer-search-trigger svg{width:14px;height:14px;vertical-align:middle}
.footer-bottom{text-align:center;padding-top:20px;margin-top:20px;border-top:1px solid rgba(255,255,255,.08);font-size:var(--text-xs);color:rgba(255,255,255,.35)}
.footer-icp{color:rgba(255,255,255,.35);text-decoration:none;transition:color .2s}
.footer-icp:hover{color:rgba(255,255,255,.6)}

/* ===== RESPONSIVE ===== */
@media(max-width:1024px){
  .about-grid{grid-template-columns:repeat(2,1fr)}
  .about-statement p{font-size:var(--text-lg)}
  .prod-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:var(--white);flex-direction:column;align-items:stretch;padding:16px;gap:4px;border-bottom:1px solid rgba(66,165,245,0.1);box-shadow:var(--shadow-md)}.nav-links.open{max-height:calc(100vh - 80px);overflow-y:auto}
  .nav-toggle{display:flex}
  .nav-dropdown{display:none;position:static;box-shadow:none;border:none;background:transparent;padding:2px 0 4px 16px;min-width:0}.has-dropdown.open>.nav-dropdown{display:block}
  .nav-dropdown a{padding:6px 14px;font-size:var(--text-xs)}
  .nav-lang-wrap{margin-left:0;padding-left:0}
  .lang-btn{font-size:var(--text-sm)}
  .hero-stats-row{bottom:36px;gap:16px}
  .hero-desc,.hero-core{white-space:normal}
  .about-grid{grid-template-columns:1fr 1fr}
  .sol-grid{grid-template-columns:1fr 1fr}
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .cases-wrapper{grid-template-columns:1fr}
  .dl-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
}
/* ===== NAV DROPDOWN CATEGORY ===== */
.nav-dropdown-cat{font-size:var(--text-xs);text-transform:uppercase;letter-spacing:0.08em;color:var(--data-blue);padding:10px 16px 4px;font-weight:var(--fw-semibold);pointer-events:none}
.nav-dropdown-div{height:1px;background:rgba(66,165,245,0.12);margin:4px 12px}

/* ===== 4-CATEGORY HERO (product/index.html) ===== */
.cat4-hero{max-width:1100px;margin:0 auto;display:flex;flex-direction:column;gap:28px}
.cat4-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:48px 44px;border-radius:20px;background:var(--white);border:1px solid rgba(0,0,0,0.05);box-shadow:var(--shadow-sm);transition:all .35s;text-decoration:none;color:inherit}
.cat4-row:hover{transform:translateY(-6px);box-shadow:0 20px 60px rgba(15,23,42,0.1);border-color:rgba(66,165,245,0.12)}
.cat4-visual{position:relative;display:flex;align-items:center;justify-content:center;min-height:200px;border-radius:16px;overflow:hidden}
.cat4-v-sensor{background:linear-gradient(135deg,rgba(66,165,245,0.06),rgba(66,165,245,0.02))}
.cat4-v-acq{background:linear-gradient(135deg,rgba(255,152,0,0.06),rgba(255,152,0,0.02))}
.cat4-v-sw{background:linear-gradient(135deg,rgba(76,175,80,0.06),rgba(76,175,80,0.02))}
.cat4-v-cloud{background:linear-gradient(135deg,rgba(156,39,176,0.06),rgba(156,39,176,0.02))}
.cat4-illustration{position:relative;z-index:1}
.cat4-glow{position:absolute;width:180px;height:180px;border-radius:50%;pointer-events:none;top:50%;left:50%;transform:translate(-50%,-50%)}
.cat4-info{display:flex;flex-direction:column;gap:4px}
.cat4-info h2{font-size:var(--text-2xl);font-weight:var(--fw-bold);color:var(--navy-dark);margin:0;padding:0;border:none;letter-spacing:-0.01em}
.cat4-info p{font-size:var(--text-base);color:var(--text-mid);line-height:var(--lh-relaxed);margin:0}
.cat4-tag{display:inline-block;padding:4px 14px;border-radius:20px;font-size:var(--text-xs);font-weight:var(--fw-semibold);width:fit-content}
.tag-blue{background:rgba(66,165,245,0.1);color:#1E88E5}
.tag-orange{background:rgba(255,152,0,0.1);color:#F57C00}
.tag-green{background:rgba(76,175,80,0.1);color:#388E3C}
.tag-purple{background:rgba(156,39,176,0.1);color:#7B1FA2}
.cat4-link{display:inline-flex;align-items:center;gap:6px;font-size:var(--text-sm);font-weight:var(--fw-semibold);color:var(--data-blue);margin-top:8px;transition:gap .25s}
.cat4-row:hover .cat4-link{gap:12px}
.cat4-link-ext{color:var(--data-purple-dark)}

/* ===== CATEGORY PAGE SIDEBAR ===== */
.cat-page{display:grid;grid-template-columns:280px 1fr;gap:32px;max-width:1500px;margin:0 auto;padding:0 16px}
.cat-sidebar{position:sticky;top:88px;align-self:start;max-height:calc(100vh - 120px);overflow-y:auto;background:var(--white);border-radius:var(--radius-lg);border:1px solid rgba(0,0,0,0.05);box-shadow:var(--shadow-sm)}
.cat-sidebar h3{font-family:var(--font-heading);font-size:var(--text-2xl);font-weight:var(--fw-bold);color:var(--navy-dark);padding:20px 18px 14px;margin:0;border-bottom:1px solid rgba(0,0,0,0.06)}
.cat-sidebar-group{margin:0;border-bottom:1px solid rgba(0,0,0,0.03)}
.cat-sidebar-group:last-child{border-bottom:none}
.cat-sidebar-group-title{font-size:var(--text-base);color:var(--navy-dark);font-weight:var(--fw-normal);padding:12px 18px;display:flex;align-items:center;gap:8px;cursor:pointer;user-select:none;transition:all .2s}
.cat-sidebar-group-title:hover{color:#000;background:rgba(0,0,0,0.04)}
.cat-sidebar-group-title::after{content:'';width:16px;height:16px;background:currentColor;mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");mask-size:contain;mask-repeat:no-repeat;margin-left:auto;transition:transform .25s;flex-shrink:0;opacity:.6}
.cat-sidebar-group.collapsed .cat-sidebar-group-title::after{transform:rotate(-90deg)}
.cat-sidebar-group a{display:flex;align-items:center;gap:8px;padding:8px 18px 8px 34px;font-size:var(--text-sm);color:var(--text-mid);transition:all .2s;font-weight:var(--fw-normal);border-radius:0;position:relative}
.cat-sidebar-group a:hover{color:var(--navy-dark);background:rgba(66,165,245,0.05)}
.cat-sidebar-group a.active{color:#000;background:rgba(0,0,0,0.06);font-weight:var(--fw-normal)}
.cat-sidebar-group a.active::before{content:'';position:absolute;left:20px;top:50%;transform:translateY(-50%);width:3px;height:18px;border-radius:2px;background:var(--navy-dark)}
.cat-sidebar-current{cursor:default!important;color:#000!important;font-weight:var(--fw-normal)!important;background:rgba(0,0,0,0.06)!important;border-left:3px solid var(--navy-dark);padding-left:15px;border-radius:0 8px 8px 0;margin-left:0;margin-right:8px}
.cat-sidebar-current:hover{background:rgba(0,0,0,0.06)!important}

.cat-sidebar-cat{display:flex;align-items:center;gap:8px;padding:10px 18px;font-size:var(--text-sm);color:var(--text-mid);transition:all .2s;font-weight:var(--fw-medium);border-bottom:1px solid rgba(0,0,0,0.03);text-decoration:none}
.cat-sidebar-cat:hover{color:var(--data-blue);background:rgba(66,165,245,0.05)}
.cat-sidebar-ext{font-weight:var(--fw-normal)}
.cat-sidebar-ext:hover{background:rgba(66,165,245,0.05);color:var(--data-blue)}
.cat-sidebar-group.collapsed a{display:none}
.cat-main h2{font-family:var(--font-heading);font-size:var(--text-2xl);font-weight:var(--fw-bold);color:var(--navy-dark);margin-bottom:24px;letter-spacing:-0.01em}
/* sidebar scrollbar */
.cat-sidebar::-webkit-scrollbar{width:4px}
.cat-sidebar::-webkit-scrollbar-track{background:transparent}
.cat-sidebar::-webkit-scrollbar-thumb{background:rgba(0,0,0,0.1);border-radius:4px}
.cat-sidebar::-webkit-scrollbar-thumb:hover{background:rgba(0,0,0,0.2)}

@media(max-width:768px){
  .cat4-row{grid-template-columns:1fr;gap:24px;padding:28px 24px}
  .cat4-visual{min-height:140px}
  .cat4-info h2{font-size:var(--text-xl)}
  .cat4-info p{font-size:var(--text-sm)}
  .cat-page{grid-template-columns:1fr}
  .cat-sidebar{position:static;max-height:none;overflow-y:visible;border-radius:var(--radius);margin-bottom:16px}
  .prod-page{grid-template-columns:1fr}
  .prod-sidebar{display:none}
}

/* ===== PRODUCT TABS ===== */
.prod-tabs{display:flex;gap:4px;max-width:1200px;margin:0 auto 32px;flex-wrap:wrap;justify-content:center}
.prod-tab{padding:12px 28px;border:1.5px solid var(--data-blue);background:transparent;color:var(--data-blue);border-radius:30px;cursor:pointer;font-size:var(--text-sm);font-weight:var(--fw-semibold);transition:all .25s}
.prod-tab:hover{background:rgba(66,165,245,0.06)}
.prod-tab.active{background:var(--data-blue);color:#fff}
.prod-tab-panel{display:none}
.prod-tab-panel.active{display:block}
.prod-tab-desc{text-align:center;color:var(--text-mid);margin-bottom:32px;max-width:700px;margin-left:auto;margin-right:auto;font-size:var(--text-sm);line-height:var(--lh-normal)}

/* ===== PRODUCT SUBGROUP ===== */
.prod-subgroup{margin-bottom:40px}
.prod-subgroup-title{font-size:var(--text-base);font-weight:var(--fw-semibold);color:var(--navy-dark);margin-bottom:16px;padding-left:12px;border-left:3px solid var(--data-blue-light)}

/* ===== SPEC TABLE (TEXT FORMAT) ===== */
.prod-spec-text{background:none;border-radius:0;padding:0;overflow-x:auto;border:none;box-shadow:none}
.spec-table{width:100%;border-collapse:collapse;font-size:var(--text-base)}
.spec-table thead th{position:sticky;top:0;background:var(--navy-dark);color:#fff;padding:12px 16px;font-size:var(--text-xs);font-weight:var(--fw-semibold);text-align:left;letter-spacing:0.04em;text-transform:uppercase}
.spec-table td{padding:12px 16px;border-bottom:1px solid rgba(0,0,0,0.05);line-height:var(--lh-normal);vertical-align:top}
.spec-table td:first-child{font-weight:var(--fw-semibold);color:var(--navy-dark);white-space:nowrap;width:140px;background:rgba(66,165,245,0.02)}
.spec-table td:last-child{color:var(--text-mid)}
.spec-table tbody tr{transition:background .15s}
.spec-table tbody tr:hover{background:rgba(66,165,245,0.03)}
.spec-table tbody tr:nth-child(even){background:rgba(0,0,0,0.015)}
.spec-table tbody tr:nth-child(even) td:first-child{background:rgba(66,165,245,0.04)}
.spec-table tbody tr:nth-child(even):hover{background:rgba(66,165,245,0.05)}

@media(max-width:1024px){
  .prod-card-grid{grid-template-columns:repeat(2,1fr)}
  .prod-card-item-img{height:200px}
  .prod-card-item-img img{max-height:160px}
  .prod-card-img-large .prod-card-item-img{padding:8px;height:200px}
  .prod-card-img-large .prod-card-item-img img{max-height:184px}}
/* ===== SERVICE MODAL ===== */
.service-modal-overlay{position:fixed;inset:0;z-index:10000;background:rgba(15,23,42,0.5);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:all .3s}
.service-modal-overlay.open{opacity:1;visibility:visible}
.service-modal{background:var(--white);border-radius:var(--radius-lg);padding:40px 36px;max-width:420px;width:90%;box-shadow:0 24px 80px rgba(15,23,42,0.25);position:relative;transform:translateY(20px);transition:transform .35s cubic-bezier(0.22,0.61,0.36,1)}
.service-modal-overlay.open .service-modal{transform:translateY(0)}
.service-modal-close{position:absolute;top:16px;right:16px;width:36px;height:36px;border-radius:50%;border:none;background:rgba(0,0,0,0.04);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;color:var(--text-light)}
.service-modal-close:hover{background:rgba(0,0,0,0.08);color:var(--text-dark)}
.service-modal-close svg{width:18px;height:18px}
.service-modal h3{font-family:var(--font-heading);font-size:var(--text-xl);font-weight:var(--fw-bold);color:var(--navy-dark);margin-bottom:6px}
.service-modal .modal-sub{font-size:var(--text-sm);color:var(--text-light);margin-bottom:28px}
.service-modal .contact-row{display:flex;align-items:center;gap:14px;padding:14px 0;border-bottom:1px solid rgba(0,0,0,0.05)}
.service-modal .contact-row:last-child{border-bottom:none}
.service-modal .contact-icon{width:44px;height:44px;border-radius:12px;background:rgba(66,165,245,0.08);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.service-modal .contact-icon svg{width:20px;height:20px;stroke:var(--data-blue);stroke-width:1.5;fill:none}
.service-modal .contact-info .label{font-size:var(--text-xs);color:var(--text-light);margin-bottom:2px}
.service-modal .contact-info .value{font-size:var(--text-base);font-weight:var(--fw-semibold);color:var(--navy-dark)}
.nav-service-trigger{cursor:pointer}

@media(max-width:480px){
  .hero{padding-top:120px}
  .hero-stats-row{position:static;margin-top:28px}
  .about-grid{grid-template-columns:1fr}
  .about-statement p{font-size:var(--text-base)}
  .about-container{padding:0 20px}
  .about-item{padding:24px 20px}
  .about-num{font-size:2.4rem}
  .sol-grid{grid-template-columns:1fr}
  .prod-grid{grid-template-columns:1fr}
  .prod-card-grid{grid-template-columns:1fr}
  .prod-card-item-img{height:180px}
  .prod-card-item-img img{max-height:140px}
  .prod-card-img-large .prod-card-item-img{padding:6px;height:180px}
  .prod-card-img-large .prod-card-item-img img{max-height:168px}  .hero h1{font-size:1.8rem}
  .dl-grid{grid-template-columns:1fr}
  .footer-inner{flex-direction:column;text-align:center}
  .sol-monitor-grid,.sol-feature-grid,.sol-scenario-grid{grid-template-columns:1fr}
  .sol-arch-diagram{padding:20px}
  .sol-arch-diagram svg{max-width:100%;height:auto}
}

/* ===== SOLUTION DETAIL PAGES ===== */
.sol-detail{max-width:1100px;margin:0 auto;padding:64px 24px 80px}
/* overview intro */
.sol-overview{display:flex;gap:28px;align-items:flex-start;margin-bottom:56px;padding:36px 40px;background:linear-gradient(135deg,rgba(66,165,245,0.03),rgba(66,165,245,0.01));border-radius:var(--radius-lg);border:1px solid rgba(66,165,245,0.08)}
.sol-overview-icon{flex-shrink:0;width:56px;height:56px;border-radius:14px;background:rgba(66,165,245,0.1);display:flex;align-items:center;justify-content:center}
.sol-overview-icon svg{width:28px;height:28px;stroke:var(--data-blue);stroke-width:1.5;fill:none}
.sol-overview-text{flex:1}
.sol-overview-text h2{font-family:var(--font-heading);font-size:var(--text-2xl);font-weight:var(--fw-bold);color:var(--navy-dark);margin-bottom:12px;letter-spacing:-0.01em}
.sol-overview-text p{font-size:var(--text-base);color:var(--text-mid);line-height:var(--lh-relaxed);margin-bottom:10px}
/* section title with icon */
.sol-section-title{display:flex;align-items:center;gap:12px;margin:48px 0 24px;padding-bottom:14px;border-bottom:2px solid rgba(0,0,0,0.06)}
.sol-section-title svg{width:24px;height:24px;stroke:var(--data-blue);stroke-width:1.5;fill:none;flex-shrink:0}
.sol-section-title h3{font-family:var(--font-heading);font-size:var(--text-xl);font-weight:var(--fw-bold);color:var(--navy-dark);margin:0}
/* architecture diagram */
.sol-arch-diagram{background:var(--white);border-radius:var(--radius-lg);border:1px solid rgba(0,0,0,0.06);padding:32px 24px;margin-bottom:16px;overflow-x:auto;-webkit-overflow-scrolling:touch;text-align:center}
.sol-arch-diagram svg{max-width:100%;height:auto}
/* monitoring items grid */
.sol-monitor-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:16px}
.sol-monitor-item{background:var(--white);border-radius:var(--radius);padding:24px 28px;border:1px solid rgba(0,0,0,0.05);box-shadow:var(--shadow-sm);transition:all .3s}
.sol-monitor-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:rgba(66,165,245,0.12)}
.sol-monitor-item h4{font-family:var(--font-heading);font-size:var(--text-base);font-weight:var(--fw-semibold);color:var(--navy-dark);margin-bottom:6px}
.sol-monitor-item p{font-size:var(--text-sm);color:var(--text-light);line-height:var(--lh-normal);margin:0}
/* feature highlights grid */
.sol-feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:16px}
.sol-feature-item{background:var(--white);border-radius:var(--radius);padding:28px 24px;border:1px solid rgba(0,0,0,0.05);box-shadow:var(--shadow-sm);transition:all .3s;border-top:3px solid var(--data-blue)}
.sol-feature-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.sol-feature-item h4{font-family:var(--font-heading);font-size:var(--text-base);font-weight:var(--fw-semibold);color:var(--navy-dark);margin-bottom:8px}
.sol-feature-item p{font-size:var(--text-sm);color:var(--text-light);line-height:var(--lh-normal);margin:0}
/* equipment table */
.sol-equip-table{width:100%;border-collapse:collapse;font-size:var(--text-base);margin-bottom:16px;background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm)}
.sol-equip-table thead th{background:var(--navy-dark);color:#fff;padding:14px 20px;font-size:var(--text-xs);font-weight:var(--fw-semibold);text-align:left;letter-spacing:0.04em;text-transform:uppercase}
.sol-equip-table td{padding:12px 20px;border-bottom:1px solid rgba(0,0,0,0.05);line-height:var(--lh-normal);vertical-align:top}
.sol-equip-table td:first-child{font-weight:var(--fw-semibold);color:var(--navy-dark);width:22%;background:rgba(66,165,245,0.02)}
.sol-equip-table td:nth-child(2){color:var(--text-mid);width:30%}
.sol-equip-table td:last-child{color:var(--text-light);width:48%}
.sol-equip-table tbody tr{transition:background .15s}
.sol-equip-table tbody tr:hover{background:rgba(66,165,245,0.03)}
/* scenario cards */
.sol-scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:16px}
.sol-scenario-item{background:var(--white);border-radius:var(--radius);padding:24px;border:1px solid rgba(0,0,0,0.05);box-shadow:var(--shadow-sm);text-align:center;transition:all .3s}
.sol-scenario-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.sol-scenario-item .sc-icon{width:44px;height:44px;border-radius:12px;background:rgba(66,165,245,0.08);display:flex;align-items:center;justify-content:center;margin:0 auto 14px}
.sol-scenario-item .sc-icon svg{width:22px;height:22px;stroke:var(--data-blue);stroke-width:1.5;fill:none}
.sol-scenario-item h4{font-size:var(--text-sm);font-weight:var(--fw-semibold);color:var(--navy-dark);margin-bottom:4px}
.sol-scenario-item p{font-size:var(--text-xs);color:var(--text-light);line-height:var(--lh-normal);margin:0}
/* responsive */
@media(max-width:768px){
  .sol-overview{flex-direction:column;padding:24px}
  .sol-monitor-grid{grid-template-columns:1fr}
  .sol-feature-grid{grid-template-columns:1fr 1fr}
  .sol-scenario-grid{grid-template-columns:1fr 1fr}
  .sol-detail{padding:48px 16px 60px}
}

/* ===== CATALOG GRID (产品选型手册) ===== */
.catalog-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.catalog-card{display:block;background:var(--white);border-radius:var(--radius);border:1px solid rgba(0,0,0,0.06);overflow:hidden;transition:all .3s;text-decoration:none;color:inherit}
.catalog-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(66,165,245,0.2)}
.catalog-img-wrap{aspect-ratio:3/4;display:flex;align-items:center;justify-content:center;background:rgba(66,165,245,0.02);padding:16px;overflow:hidden}
.catalog-img-wrap img{max-width:100%;max-height:100%;object-fit:contain;transition:transform .35s}
.catalog-card:hover .catalog-img-wrap img{transform:scale(1.05)}
.catalog-name{padding:12px 16px;font-size:var(--text-sm);font-weight:var(--fw-medium);color:var(--text-dark);text-align:center;border-top:1px solid rgba(0,0,0,0.04);line-height:var(--lh-normal)}

/* ===== FILE LIST (说明书/软件工具) ===== */
.file-list{display:flex;flex-direction:column;gap:12px}
.file-row{display:flex;align-items:center;gap:16px;padding:16px 20px;background:var(--white);border-radius:var(--radius);border:1px solid rgba(0,0,0,0.05);box-shadow:var(--shadow-sm);transition:all .25s}
.file-row:hover{border-color:rgba(66,165,245,0.15);box-shadow:var(--shadow-md);transform:translateX(4px)}
.file-icon{width:44px;height:44px;border-radius:10px;background:rgba(66,165,245,0.08);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.file-icon svg{width:22px;height:22px;stroke:var(--data-blue);stroke-width:1.5;fill:none}
.file-info{flex:1;min-width:0}
.file-name{font-size:var(--text-sm);font-weight:var(--fw-semibold);color:var(--navy-dark);margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.file-type{font-size:var(--text-xs);color:var(--text-light)}
.file-dl-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 20px;background:var(--data-blue);color:#fff;border-radius:20px;font-size:var(--text-xs);font-weight:var(--fw-semibold);text-decoration:none;flex-shrink:0;transition:all .2s}
.file-date{font-size:var(--text-xs);color:var(--text-light);flex-shrink:0;margin-right:12px;min-width:80px;text-align:right}
.file-dl-btn:hover{background:#1E88E5;transform:translateY(-1px);box-shadow:0 4px 12px rgba(66,165,245,0.3)}
@media(max-width:768px){
  .catalog-grid{grid-template-columns:repeat(2,1fr)}
  .file-row{flex-wrap:wrap}
  .file-dl-btn{width:100%;justify-content:center}
}
@media(max-width:480px){
  .catalog-grid{grid-template-columns:1fr}
}

/* ===== ONLINE TOOLS ===== */
.cat-sidebar a[data-tool]{display:flex;align-items:center;gap:8px;padding:8px 18px 8px 18px;font-size:var(--text-sm);color:var(--text-mid);transition:all .2s;font-weight:var(--fw-normal);border-radius:0;position:relative;text-decoration:none;cursor:pointer}
.cat-sidebar a[data-tool]:hover{color:var(--navy-dark);background:rgba(66,165,245,0.05)}
.cat-sidebar a[data-tool].active{color:#000;background:rgba(0,0,0,0.06);font-weight:var(--fw-normal)}
.cat-sidebar a[data-tool].active::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:18px;border-radius:2px;background:var(--navy-dark)}
.tool-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:80px 40px;color:var(--text-light);gap:16px}
.tool-placeholder p{font-size:var(--text-lg);color:var(--text-mid)}
.tool-panel h2{font-family:var(--font-heading);font-size:var(--text-2xl);font-weight:var(--fw-bold);color:var(--navy-dark);margin-bottom:8px}
.tool-desc{color:var(--text-mid);margin-bottom:28px;font-size:var(--text-base)}
.tool-input-area{display:flex;flex-direction:column;gap:12px;margin-bottom:24px}
.tool-input{width:100%;min-height:140px;padding:14px 16px;border:1px solid rgba(0,0,0,0.12);border-radius:var(--radius);font-family:'Courier New',Consolas,monospace;font-size:0.875rem;line-height:1.6;resize:vertical;background:var(--white);color:var(--navy-dark);transition:border-color .2s;box-sizing:border-box}
.tool-input:focus{outline:none;border-color:var(--data-blue);box-shadow:0 0 0 3px rgba(66,165,245,0.1)}
.tool-input::placeholder{color:var(--text-light);font-family:inherit}
.tool-decode-btn{display:inline-flex;align-items:center;justify-content:center;align-self:flex-start;padding:10px 32px;background:var(--data-blue);color:#fff;border:none;border-radius:20px;font-size:var(--text-sm);font-weight:var(--fw-semibold);cursor:pointer;transition:all .2s}
.tool-decode-btn:hover{background:#1E88E5;transform:translateY(-1px);box-shadow:0 4px 12px rgba(66,165,245,0.3)}
.tool-decode-btn:active{transform:translateY(0)}
.tool-result-area{margin-top:8px}
.tool-result-table{width:100%;border-collapse:collapse;font-size:var(--text-sm)}
.tool-result-table td{padding:10px 14px;border:1px solid rgba(0,0,0,0.06)}
.tool-result-table td:first-child{background:rgba(66,165,245,0.04);color:var(--text-mid);font-weight:var(--fw-medium);white-space:nowrap;width:180px}
.tool-result-table td:last-child{color:var(--navy-dark);font-family:'Courier New',Consolas,monospace;word-break:break-all}
.tool-no-result{color:var(--text-light);font-size:var(--text-sm);padding:20px 0}
/* Tool buttons row */
.tool-btn-row{display:flex;gap:10px;margin-top:12px;align-items:center;flex-wrap:wrap}
.tool-btn-sec{padding:10px 20px;background:rgba(0,0,0,0.05);color:var(--text-mid);border:none;border-radius:20px;font-size:var(--text-sm);font-weight:var(--fw-medium);cursor:pointer;transition:all .2s}
.tool-btn-sec:hover{background:rgba(0,0,0,0.1);color:var(--navy-dark)}
.tool-btn-clear{padding:10px 20px;background:transparent;color:var(--text-light);border:1px solid rgba(0,0,0,0.1);border-radius:20px;font-size:var(--text-sm);cursor:pointer;transition:all .2s}
.tool-btn-clear:hover{color:#ef4444;border-color:#ef4444}
.tool-btn-generate{padding:10px 20px;background:#22c55e;color:#fff;border:none;border-radius:20px;font-size:var(--text-sm);font-weight:var(--fw-semibold);cursor:pointer;transition:all .2s}
.tool-btn-generate:hover{background:#16a34a}
.tool-error{color:#ef4444;font-size:var(--text-sm);margin-top:8px;min-height:20px}
.tool-section-title{font-family:var(--font-heading);font-size:1rem;color:var(--navy-dark);margin:24px 0 12px;padding-bottom:6px;border-bottom:1px solid rgba(0,0,0,0.06)}
/* Byte map */
.tool-byte-map{background:rgba(0,0,0,0.02);border-radius:var(--radius);padding:14px 18px;margin-bottom:20px;overflow-x:auto;font-family:'Courier New',Consolas,monospace;font-size:0.82rem;line-height:1.7;color:var(--text-mid)}
.tool-byte-map .hl{color:#f59e0b}
.tool-byte-map .hl2{color:var(--data-blue)}
.tool-byte-map .hl3{color:#22c55e}
/* Detail toggle */
.tool-detail-toggle{cursor:pointer;color:var(--text-light);font-size:0.85rem;user-select:none;margin-bottom:12px;display:inline-block}
.tool-detail-toggle:hover{color:var(--data-blue)}
.tool-detail-content{display:none;margin-top:12px}
.tool-detail-content.show{display:block}
/* Frame info table */
.tool-frame-table{width:100%;border-collapse:collapse;margin-bottom:20px;font-size:0.85rem}
.tool-frame-table th,.tool-frame-table td{text-align:left;padding:8px 12px;border-bottom:1px solid rgba(0,0,0,0.05)}
.tool-frame-table th{color:var(--text-light);font-weight:var(--fw-medium);width:130px}
.tool-frame-table td{font-family:'Courier New',Consolas,monospace;color:var(--navy-dark)}
.tool-frame-table .hl{color:#f59e0b}
/* Data table */
.tool-data-table{width:100%;border-collapse:collapse}
.tool-data-table th{background:rgba(0,0,0,0.04);color:var(--text-mid);padding:8px 12px;text-align:left;font-size:0.85rem;font-weight:var(--fw-medium)}
.tool-data-table td{padding:6px 12px;border-bottom:1px solid rgba(0,0,0,0.04);font-size:0.85rem}
.tool-data-table tr:hover td{background:rgba(66,165,245,0.03)}
.tool-data-table .col-code{color:#f59e0b;font-family:'Courier New',Consolas,monospace;width:80px}
.tool-data-table .col-desc{color:var(--text-mid);width:220px}
.tool-data-table .col-val{color:var(--data-blue);font-family:'Courier New',Consolas,monospace;font-weight:var(--fw-semibold)}
.tool-data-table .col-unit{color:var(--text-light);width:60px}
.tool-data-table .col-raw{color:var(--text-light);font-family:'Courier New',Consolas,monospace;font-size:0.8rem}
/* Function code tags */
.tool-tag{display:inline-block;padding:2px 8px;border-radius:4px;font-size:0.75rem;font-weight:var(--fw-semibold);margin-right:6px}
.tool-tag-31{background:rgba(245,158,11,0.12);color:#b45309;border:1px solid rgba(245,158,11,0.25)}
.tool-tag-32{background:rgba(34,197,94,0.12);color:#15803d;border:1px solid rgba(34,197,94,0.25)}
.tool-tag-33{background:rgba(139,92,246,0.12);color:#6d28d9;border:1px solid rgba(139,92,246,0.25)}
.tool-tag-34{background:rgba(236,72,153,0.12);color:#be185d;border:1px solid rgba(236,72,153,0.25)}
/* Inline edit inputs */
.tool-edit-input{background:var(--white);border:1px solid rgba(0,0,0,0.12);border-radius:4px;color:var(--navy-dark);padding:4px 8px;font-family:'Courier New',Consolas,monospace;font-size:0.85rem;width:100%;max-width:200px}
.tool-edit-input:focus{outline:none;border-color:var(--data-blue);box-shadow:0 0 0 2px rgba(66,165,245,0.1)}
.tool-data-edit-input{background:var(--white);border:1px solid rgba(0,0,0,0.12);border-radius:4px;color:var(--data-blue);padding:4px 8px;font-family:'Courier New',Consolas,monospace;font-size:0.85rem;width:120px;font-weight:var(--fw-semibold)}
.tool-data-edit-input:focus{outline:none;border-color:var(--data-blue);box-shadow:0 0 0 2px rgba(66,165,245,0.1)}
/* Generated packet box */
.tool-generated-box{background:rgba(34,197,94,0.05);border:1px solid rgba(34,197,94,0.3);border-radius:var(--radius);padding:14px 18px;font-family:'Courier New',Consolas,monospace;font-size:0.9rem;color:var(--navy-dark);word-break:break-all;margin-top:10px;line-height:1.6}

/* ===== SEARCH ===== */
.nav-links>li>.nav-search-btn{padding:10px 20px;position:relative;display:flex;align-items:center;justify-content:center;gap:4px;width:auto;height:auto;color:var(--text-mid);font-size:0;overflow:hidden}
.nav-links>li>.nav-search-btn::before{content:'';position:absolute;bottom:0;left:18px;right:18px;height:2px;background:var(--data-blue);transform:scaleX(0);transition:transform .25s}
.nav-links>li>.nav-search-btn:hover{color:var(--data-blue);background:none}
.nav-links>li>.nav-search-btn:hover::before{transform:scaleX(1)}
.nav-search-btn svg{width:17px;height:17px;flex-shrink:0}
.search-overlay{position:fixed;inset:0;background:rgba(15,23,42,0.3);z-index:9998;opacity:0;visibility:hidden;transition:all .25s;backdrop-filter:blur(4px)}
.search-overlay.open{opacity:1;visibility:visible}
.search-modal{position:fixed;top:80px;left:50%;transform:translateX(-50%) translateY(-12px);width:560px;max-width:calc(100vw - 32px);z-index:9999;opacity:0;visibility:hidden;transition:all .25s}
.search-modal.open{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.search-input-wrap{display:flex;align-items:center;background:#fff;border-radius:14px;box-shadow:0 8px 40px rgba(15,23,42,0.16);overflow:hidden}
.search-input-wrap svg{width:20px;height:20px;color:var(--text-light);margin-left:18px;flex-shrink:0}
.search-input-box{flex:1;border:none;outline:none;padding:16px 14px;font-size:1rem;font-family:var(--font-body);color:var(--navy-dark);background:transparent;min-width:0}
.search-input-box::placeholder{color:var(--text-light)}
.search-results{background:#fff;border-radius:0 0 14px 14px;box-shadow:0 8px 40px rgba(15,23,42,0.12);max-height:420px;overflow-y:auto;margin-top:2px;display:none}
.search-results.active{display:block}
.search-result-item{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;cursor:pointer;transition:background .15s;border-bottom:1px solid rgba(0,0,0,0.04);text-decoration:none;color:inherit}
.search-result-item:last-child{border-bottom:none}
.search-result-item:hover,.search-result-item.focus{background:rgba(66,165,245,0.05)}
.search-result-title{font-size:0.95rem;font-weight:var(--fw-medium);color:var(--navy-dark)}
.search-result-title mark,.search-result-cat mark{background:rgba(66,165,245,0.2);color:var(--data-blue);border-radius:2px;padding:0 2px}
.search-result-cat{font-size:0.75rem;color:var(--text-light);margin-top:3px}
.search-empty{padding:32px 18px;text-align:center;color:var(--text-light);font-size:0.9rem}
@media(max-width:768px){
  .search-modal{top:72px;width:100%;max-width:none;border-radius:0}
  .search-input-wrap{border-radius:0}
  .search-results{border-radius:0;max-height:calc(100vh - 140px)}
}
.tool-gen-info{margin-top:8px;font-size:0.85rem;color:var(--text-light)}