:root {
    --bg-dark: #0B1120;
    --bg-dark-2: #111827;
    --bg-section: #0F172A;
    --surface: #1E293B;
    --surface-2: #1A2332;
    --bg-light: #ffffff;
    --bg-light-2: #f8fafc;
    --blue: #3B82F6;
    --blue-hover: #92c8fe;
    --blue-light: rgba(50,150,255,0.12);
    --blue-glow: rgba(50,150,255,0.3);
    --cyan: #22D3EE;
    --green: #34D399;
    --red: #EF4444;
    --amber: #FF8C00;
    --text-w: #F1F5F9;
    --text-g: #94A3B8;
    --text-d: #0F172A;
    --text-d2: #334155;
    --text-d3: #64748B;
    --border-d: rgba(255,255,255,0.08);
    --border-l: #E2E8F0;
    --font: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
    --mono: 'JetBrains Mono', monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;overflow-y:scroll}
body{font-family:var(--font);background:var(--bg-dark);color:var(--text-w);line-height:1.7;overflow-x:hidden}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}

/* ===== HEADER (白底，與 iSeek 官網一致) ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;padding:0 48px;height:64px;display:flex;align-items:center;background:rgba(255,255,255,0.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--border-l);transition:box-shadow .3s}
.header.scrolled{box-shadow:0 2px 20px rgba(0,0,0,0.08)}
.header-inner{max-width:1200px;margin:0 auto;width:100%;display:flex;align-items:center;gap:48px}
.header-logo{display:flex;align-items:center;flex-shrink:0}
.header-logo img{height:24px;width:auto}
.header-nav{display:flex;gap:8px;flex:1}
.header-nav a{padding:8px 16px;font-size:14px;font-weight:500;color:var(--text-d3);border-radius:8px;transition:all .2s}
.header-nav a:hover,.header-nav a.active{color:var(--text-d);background:rgba(0,0,0,0.04)}
.header-actions{display:flex;gap:12px;flex-shrink:0}
.btn-header-cta{background:var(--blue);color:#fff;padding:10px 24px;border-radius:10px;font-size:14px;font-weight:600;cursor:pointer;font-family:var(--font);white-space:nowrap;transition:all .3s;border:none}
.btn-header-cta:hover{background:transparent;color:var(--blue);box-shadow:inset 0 0 0 2px var(--blue)}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:10px;font-size:14px;font-weight:600;cursor:pointer;transition:all .25s;border:none;font-family:var(--font);white-space:nowrap}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-hover);transform:translateY(-1px);box-shadow:0 6px 20px var(--blue-glow)}
.btn-outline{background:transparent;color:var(--text-g);border:1px solid rgba(255,255,255,0.2)}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)}

/* ===== HERO ===== */
.hero{padding:140px 48px 80px;background:linear-gradient(rgba(11,17,32,0.8),rgba(11,17,32,0.8)),url('images/iseek-food-factory-ai-safety-hero.webp') center/cover no-repeat;position:relative;overflow:hidden;min-height:100vh;display:flex;align-items:center}
.hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;-webkit-mask-image:linear-gradient(to right,transparent 0%,transparent 25%,rgba(0,0,0,0.2) 45%,rgba(0,0,0,0.5) 65%,rgba(0,0,0,0.75) 85%,rgba(0,0,0,0.85) 100%);mask-image:linear-gradient(to right,transparent 0%,transparent 25%,rgba(0,0,0,0.2) 45%,rgba(0,0,0,0.5) 65%,rgba(0,0,0,0.75) 85%,rgba(0,0,0,0.85) 100%);opacity:0.45;pointer-events:none}
.hero::after{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,0.02) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.02) 1px,transparent 1px);background-size:60px 60px;pointer-events:none}
.hero-inner{max-width:1200px;width:100%;margin:0 auto;position:relative;z-index:1}
@keyframes heroIn{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:none}}
.hero-badge{animation:heroIn .6s ease-out both}
.hero-title{animation:heroIn .6s ease-out .15s both}
.hero-desc{animation:heroIn .6s ease-out .3s both}
.hero-cta{animation:heroIn .6s ease-out .45s both}
.hero-stats{animation:heroIn .6s ease-out .6s both}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;background:var(--blue-light);border:1px solid rgba(50,150,255,0.25);border-radius:20px;font-size:13px;font-weight:500;color:var(--blue);margin-bottom:24px}
.hero-badge::before{content:'';width:6px;height:6px;background:var(--blue);border-radius:50%}
.hero-title{font-size:48px;font-weight:900;line-height:1.25;margin-bottom:20px;letter-spacing:-0.02em}
.hero-title .highlight{color:var(--blue);display:block;letter-spacing:1px;}
.hero-desc{font-size:16px;color:var(--text-g);line-height:1.9;margin-bottom:32px;max-width:620px}
.hero-desc strong{color:var(--text-w)}
.hero-cta{display:flex;gap:16px;margin-bottom:48px}
.hero-stats{display:flex;gap:40px;flex-wrap:wrap}
.hero-stat{text-align:left}
.hero-stat-num{display:block;font-family:var(--font);font-size:48px;font-weight:700;line-height:1;color:var(--blue);text-shadow:2px 2px 8px rgba(0,0,0,0.8),0 0 20px rgba(59,130,246,0.3)}
.hero-stat-label{display:block;font-size:13px;color:var(--text-g);margin-top:8px}

/* ===== SECTIONS ===== */
.section{padding:100px 48px;min-height:100vh;display:flex;align-items:center}
.section-inner{max-width:1200px;margin:0 auto;width:100%}
.section-light{background:var(--bg-light);color:var(--text-d)}
.section-light-2{background:var(--bg-light-2);color:var(--text-d)}
.section-dark{background:var(--bg-dark-2)}
.section-dark-2{background:var(--bg-section)}
#challenge{background:linear-gradient(rgba(10,15,30,0.82),rgba(10,15,30,0.82)),url('images/iseek-food-factory-worker-safety.webp') center/cover no-repeat}
.section-divider{position:relative}
.section-divider::before{content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);width:100%;max-width:1200px;height:1px;background:linear-gradient(90deg,transparent,rgba(59,130,246,0.3) 20%,rgba(59,130,246,0.5) 50%,rgba(59,130,246,0.3) 80%,transparent)}
.section-label{font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:2px;color:var(--blue);margin-bottom:12px}
.section-title{font-size:36px;font-weight:800;line-height:1.3;margin-bottom:16px;letter-spacing:1px}
.section-title-light{color:var(--text-d)}
.section-desc{font-size:16px;line-height:1.8;max-width:640px}
.section-desc-light{color:var(--text-d3)}
.section-desc-dark{color:var(--text-g)}
.text-center{text-align:center}
.mx-auto{margin-left:auto;margin-right:auto}

/* ===== 新聞案例 (Challenge Cards 風格) ===== */
.news-banner{max-width:1200px;margin:0 auto;background:var(--surface);border:1px solid var(--border-d);border-left:4px solid var(--red);border-radius:16px;padding:48px;display:grid;grid-template-columns:1fr 1fr;gap:48px;margin-top:48px}
.news-tag{display:inline-flex;align-items:center;gap:6px;padding:6px 16px;background:var(--red);color:#fff;border-radius:8px;font-size:13px;font-weight:700;margin-bottom:16px}
.news-left h3{font-size:22px;font-weight:800;line-height:1.5;margin-bottom:12px}
.news-meta{font-size:13px;color:var(--text-g);margin-bottom:16px;font-family:var(--mono)}
.news-body{font-size:15px;color:var(--text-g);line-height:2;border-top:1px solid var(--border-d);padding-top:16px}
.news-body strong{color:var(--red)}
.prevent-title{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.prevent-icon{width:40px;height:40px;background:rgba(59,130,246,0.1);border:1px solid rgba(59,130,246,0.2);border-radius:10px;display:flex;align-items:center;justify-content:center}
.prevent-icon i{font-size:18px;color:var(--blue)}
.prevent-title h4{font-size:18px;font-weight:800;color:var(--blue)}
.prevent-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.prevent-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text-g);line-height:1.8}
.prevent-list li .step{flex-shrink:0;width:28px;height:28px;background:var(--blue);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:12px;font-weight:700}
.prevent-list li strong{color:var(--text-w)}

/* ===== Challenge Cards ===== */
.challenge-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:60px}
.challenge-card{background:var(--surface);border:1px solid var(--border-d);border-radius:16px;padding:32px 28px;text-align:center;transition:all .4s;position:relative;overflow:hidden}
.challenge-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--blue),var(--cyan));transform:scaleX(0);transform-origin:left;transition:transform .4s}
.challenge-card:hover::before{transform:scaleX(1)}
.challenge-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,0.3);border-color:rgba(59,130,246,0.2)}
@keyframes iconPulse{0%,100%{transform:scale(1)}50%{transform:scale(1.12)}}
@keyframes iconFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.challenge-icon{width:56px;height:56px;margin:0 auto 20px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:24px;animation:iconFloat 3s ease-in-out infinite}
.challenge-icon.red{animation-delay:0s}
.challenge-icon.amber{animation-delay:.4s}
.challenge-icon.blue{animation-delay:.8s}
.challenge-icon.green{animation-delay:1.2s}
.challenge-icon i{animation:iconPulse 2.5s ease-in-out infinite}
.challenge-icon.red{background:rgba(239,68,68,0.1);color:var(--red)}
.challenge-icon.amber{background:rgba(255,140,0,0.1);color:var(--amber)}
.challenge-icon.blue{background:var(--blue-light);color:var(--blue)}
.challenge-icon.green{background:rgba(52,211,153,0.1);color:var(--green)}
.challenge-card h3{font-size:17px;font-weight:700;margin-bottom:10px}
.challenge-card p{font-size:14px;color:var(--text-g);line-height:1.7}

/* ===== Case Section with Camera ===== */
.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;margin-top:48px}
.case-text h3{font-size:24px;font-weight:800;margin-bottom:14px;line-height:1.4}
.case-text p{font-size:15px;color:var(--text-g);line-height:1.9;margin-bottom:24px}
.case-text p strong{color:var(--text-w)}
.case-chips{display:flex;flex-direction:column;gap:10px}
.case-chip{display:flex;align-items:center;gap:10px;padding:12px 16px;background:rgba(255,255,255,0.03);border:1px solid var(--border-d);border-radius:10px;font-size:14px;color:var(--text-g);transition:all .25s;opacity:0;transform:translateX(40px)}
.case-chip.visible{opacity:1;transform:none;transition:all .5s cubic-bezier(.16,1,.3,1)}
.case-chip:hover{border-color:rgba(59,130,246,0.2);background:rgba(59,130,246,0.04)}
.case-chip .dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
@keyframes dotBlink{0%,100%{opacity:1}50%{opacity:.4}}
.case-chip.visible .dot{animation:dotBlink 3s ease-in-out infinite}
.case-chip:nth-child(2) .dot{animation-delay:.5s}
.case-chip:nth-child(3) .dot{animation-delay:1s}
.case-chip:nth-child(4) .dot{animation-delay:1.5s}
.cam-box{position:relative;border-radius:16px;overflow:hidden;border:1px solid var(--border-d);background:#000;box-shadow:0 20px 60px rgba(0,0,0,0.4)}
.cam-box img{width:100%;height:400px;object-fit:cover;display:block}
.cam-box .overlay{position:absolute;inset:0;z-index:2;pointer-events:none}
.cam-box .overlay svg{width:100%;height:100%}

/* ===== Benefits ===== */
.benefits-section{background:linear-gradient(rgba(12,26,58,0.85),rgba(11,17,32,0.85)),url('images/iseek-ai-surveillance-monitoring-system.webp') center/cover no-repeat fixed;padding:100px 48px;text-align:center}
.benefits-inner{max-width:1200px;margin:0 auto}
.benefits-title{font-size:36px;font-weight:800;margin-bottom:12px}
.benefits-subtitle{color:var(--text-g);margin-bottom:48px;font-size:16px}
.benefits-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.benefit-card{background:var(--surface);border:1px solid var(--border-d);border-radius:16px;padding:36px 24px;transition:all .4s}
.benefit-card:hover{transform:translateY(-4px);border-color:rgba(59,130,246,0.3);box-shadow:0 12px 40px rgba(0,0,0,0.3)}
.benefit-value{margin-bottom:16px}
.benefit-arrow{font-size:20px;color:var(--blue);margin-right:4px}
.benefit-number{font-size:48px;font-weight:800;color:var(--blue);font-family:var(--font)}
.benefit-card-title{font-size:16px;font-weight:700;margin-bottom:8px}
.benefit-card-desc{font-size:14px;color:var(--text-g);line-height:1.7}

/* ===== FAQ ===== */
.faq-list{width:100%;max-width:800px;margin:40px auto 0;display:flex;flex-direction:column;gap:8px}
.faq-item{box-sizing:border-box;width:100%;background:var(--surface);border:1px solid var(--border-d);border-radius:12px;overflow:hidden;transition:all .3s}
.faq-item[open]{border-color:rgba(59,130,246,0.3)}
.faq-question{padding:20px 24px;cursor:pointer;font-size:15px;font-weight:600;list-style:none;display:flex;align-items:center;justify-content:space-between}
.faq-question::-webkit-details-marker{display:none}
.faq-question::after{content:'+';font-size:20px;color:var(--blue);font-weight:300;transition:transform .3s;flex-shrink:0;width:20px;text-align:center}
.faq-item[open] .faq-question::after{content:'\2212'}
.faq-answer{padding:0 24px 20px;font-size:14px;color:var(--text-g);line-height:1.8}

/* ===== CTA ===== */
.cta-section{padding:100px 48px;text-align:center;background:linear-gradient(rgba(11,17,32,0.82),rgba(11,17,32,0.82)),url('images/iseek-food-factory-quality-inspection.webp') center/cover no-repeat;min-height:100vh;display:flex;align-items:center}
.cta-inner{min-width:800px;margin:0 auto;margin-bottom:48px}
.cta-label{font-size:13px;font-weight:600;letter-spacing:2px;color:var(--blue);text-transform:uppercase;margin-bottom:12px}
.cta-title{font-size:40px;font-weight:900;line-height:1.3;margin-bottom:20px}
.cta-title .highlight{color:var(--blue)}
.cta-desc{font-size:16px;color:var(--text-g);line-height:1.8;margin-bottom:32px}

/* ===== FOOTER ===== */
.footer{background:#080C16;border-top:1px solid var(--border-d);padding:60px 48px 32px}
.footer-inner{max-width:1200px;margin:0 auto}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:40px}
.footer-brand p{font-size:13px;color:var(--text-g);margin-top:12px;line-height:1.7}
.footer-col-title{font-size:12px;font-weight:600;color:var(--text-g);text-transform:uppercase;letter-spacing:1.5px;margin-bottom:16px}
.footer-col a,.footer-link{display:block;font-size:14px;color:var(--text-g);margin-bottom:8px;transition:color .2s}
.footer-col a:hover{color:var(--blue)}
.footer-bottom{margin-top:40px;padding-top:20px;border-top:1px solid var(--border-d);font-size:12px;color:var(--text-g);text-align:center}

/* Back to top */
.back-to-top{position:fixed;bottom:32px;right:32px;width:44px;height:44px;border-radius:12px;background:var(--blue);color:#fff;border:none;cursor:pointer;font-size:18px;display:flex;align-items:center;justify-content:center;opacity:0;transform:translateY(20px);transition:all .3s;z-index:99}
.back-to-top.show{opacity:1;transform:none}
.back-to-top:hover{background:var(--blue-hover)}

/* Animations */
.fade-up{opacity:0;transform:translateY(30px);transition:all .7s cubic-bezier(.16,1,.3,1)}
.fade-up.visible{opacity:1;transform:none}
.fade-up-delay-1{transition-delay:.15s}
.fade-up-delay-2{transition-delay:.3s}
.fade-up-delay-3{transition-delay:.45s}
.fade-up-delay-4{transition-delay:.6s}

/* Responsive */
@media(max-width:1024px){
    .challenge-cards,.benefits-grid{grid-template-columns:repeat(2,1fr)}
    .case-grid,.news-banner{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr 1fr}
    .hero-title{font-size:36px}
}
@media(max-width:640px){
    .header{padding:0 20px}
    .header-nav{display:none}
    .section,.hero,.benefits-section,.cta-section,.footer{padding-left:20px;padding-right:20px}
    .challenge-cards,.benefits-grid,.footer-grid{grid-template-columns:1fr}
    .hero-stats{gap:24px}
    .hero-title{font-size:28px}
    .cam-box img{height:260px}
}