/* ============================================================
   欧交易所App官方下载 - 主样式表
   配色：深色(#0a0f1a)+欧蓝(#2563eb)+比特币橙(#f7931a)+
         USDT绿(#26a17b)+以太紫(#627eea)+金(#f59e0b)+白
   ============================================================ */

/* === CSS Variables === */
:root {
  --bg-dark: #0a0f1a;
  --bg-card: #111827;
  --bg-card-hover: #1a2332;
  --blue: #2563eb;
  --blue-light: #3b82f6;
  --blue-glow: rgba(37, 99, 235, 0.3);
  --btc-orange: #f7931a;
  --btc-orange-glow: rgba(247, 147, 26, 0.3);
  --usdt-green: #26a17b;
  --usdt-green-glow: rgba(38, 161, 123, 0.3);
  --eth-purple: #627eea;
  --eth-purple-glow: rgba(98, 126, 234, 0.3);
  --gold: #f59e0b;
  --gold-glow: rgba(245, 158, 11, 0.3);
  --white: #ffffff;
  --text-primary: #e5e7eb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --border: #1f2937;
  --border-light: #374151;
  --transition: 0.3s ease;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
}

/* === Reset & Base === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg-dark);
  color:var(--text-primary);
  line-height:1.7;
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;height:auto;display:block}

/* === Utility === */
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section-padding{padding:100px 0}
.section-header{text-align:center;margin-bottom:60px}
.section-header h2{font-size:2.5rem;font-weight:800;margin-bottom:16px;line-height:1.3}
.section-header h2 span{background:linear-gradient(135deg,var(--blue),var(--eth-purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.section-header p{color:var(--text-secondary);font-size:1.1rem;max-width:700px;margin:0 auto}

/* === Header / Nav === */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(10,15,26,0.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);transition:var(--transition)}
.site-header.scrolled{background:rgba(10,15,26,0.98);box-shadow:0 2px 20px rgba(0,0,0,0.5)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.5rem;font-weight:800;color:var(--white)}
.logo-icon{width:40px;height:40px;border-radius:var(--radius-sm);background:linear-gradient(135deg,var(--blue),var(--eth-purple));display:flex;align-items:center;justify-content:center;font-size:1.1rem;font-weight:900;color:var(--white)}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{color:var(--text-secondary);font-weight:500;font-size:0.95rem;transition:var(--transition);position:relative;padding:4px 0}
.nav-links a:hover,.nav-links a.active{color:var(--white)}
.nav-links a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--blue);transition:var(--transition)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-cta-btn{padding:10px 24px;background:linear-gradient(135deg,var(--blue),var(--eth-purple));color:var(--white)!important;border-radius:50px;font-weight:600!important;transition:var(--transition);animation:btn-breathe 3s ease-in-out infinite}
.nav-cta-btn:hover{transform:translateY(-2px);box-shadow:0 8px 25px var(--blue-glow)}
.nav-cta-btn::after{display:none!important}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px}
.hamburger span{display:block;width:26px;height:2px;background:var(--white);border-radius:2px;transition:var(--transition)}
.hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* === Hero Section === */
#hero{padding:160px 0 100px;position:relative;overflow:hidden;min-height:100vh;display:flex;align-items:center}
#hero::before{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(ellipse at 30% 50%,var(--blue-glow) 0%,transparent 50%),radial-gradient(ellipse at 70% 60%,var(--eth-purple-glow) 0%,transparent 50%),radial-gradient(ellipse at 50% 80%,var(--btc-orange-glow) 0%,transparent 50%);animation:hero-float 8s ease-in-out infinite;pointer-events:none}
#hero .container{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-content h1{font-size:3.2rem;font-weight:900;line-height:1.2;margin-bottom:20px}
.hero-content h1 span{background:linear-gradient(135deg,var(--blue),var(--eth-purple),var(--btc-orange));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-content .hero-subtitle{font-size:1.2rem;color:var(--text-secondary);margin-bottom:16px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px}
.hero-tag{padding:6px 16px;border-radius:50px;font-size:0.85rem;font-weight:600;border:1px solid var(--border-light)}
.hero-tag.btc{border-color:var(--btc-orange);color:var(--btc-orange)}
.hero-tag.eth{border-color:var(--eth-purple);color:var(--eth-purple)}
.hero-tag.usdt{border-color:var(--usdt-green);color:var(--usdt-green)}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{padding:14px 32px;border-radius:50px;font-weight:700;font-size:1rem;display:inline-flex;align-items:center;gap:8px;cursor:pointer;transition:var(--transition);border:none}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--eth-purple));color:var(--white);box-shadow:0 4px 20px var(--blue-glow);animation:btn-breathe 3s ease-in-out infinite}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 30px var(--blue-glow)}
.btn-secondary{background:transparent;color:var(--white);border:2px solid var(--border-light)}
.btn-secondary:hover{border-color:var(--blue);background:rgba(37,99,235,0.1)}
.btn-orange{background:linear-gradient(135deg,var(--btc-orange),var(--gold));color:var(--white);box-shadow:0 4px 20px var(--btc-orange-glow)}
.btn-orange:hover{transform:translateY(-3px);box-shadow:0 8px 30px var(--btc-orange-glow)}
.hero-image{position:relative}
.hero-image img{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}
.hero-image::after{content:'';position:absolute;inset:-4px;border-radius:var(--radius-lg);background:linear-gradient(135deg,var(--blue),var(--eth-purple),var(--btc-orange));z-index:-1;opacity:0.3;filter:blur(20px)}

/* === Stats Bar === */
.stats-bar{padding:40px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;text-align:center}
.stat-item .stat-num{font-size:2.8rem;font-weight:900;background:linear-gradient(135deg,var(--blue),var(--eth-purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-item .stat-label{color:var(--text-secondary);font-size:0.95rem;margin-top:4px}

/* === Features Section === */
#features{background:var(--bg-card)}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.feature-card{background:var(--bg-dark);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px 28px;transition:var(--transition);position:relative;overflow:hidden}
.feature-card:hover{transform:translateY(-6px);border-color:var(--blue);box-shadow:0 12px 40px rgba(37,99,235,0.15)}
.feature-card::before{content:'';position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,var(--blue),var(--eth-purple));transform:scaleX(0);transition:transform 0.4s ease;transform-origin:left}
.feature-card:hover::before{transform:scaleX(1)}
.feature-icon{width:56px;height:56px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:20px}
.feature-icon.blue{background:rgba(37,99,235,0.15);color:var(--blue)}
.feature-icon.orange{background:rgba(247,147,26,0.15);color:var(--btc-orange)}
.feature-icon.green{background:rgba(38,161,123,0.15);color:var(--usdt-green)}
.feature-icon.purple{background:rgba(98,126,234,0.15);color:var(--eth-purple)}
.feature-icon.gold{background:rgba(245,158,11,0.15);color:var(--gold)}
.feature-card h3{font-size:1.25rem;font-weight:700;margin-bottom:10px;color:var(--white)}
.feature-card p{color:var(--text-secondary);font-size:0.95rem;line-height:1.7}

/* === Market Ticker === */
#market{padding:100px 0}
.ticker-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.ticker-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:24px;transition:var(--transition);text-align:center}
.ticker-card:hover{border-color:var(--border-light);transform:translateY(-4px)}
.ticker-icon{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:900;margin:0 auto 12px}
.ticker-icon.btc-c{background:rgba(247,147,26,0.2);color:var(--btc-orange)}
.ticker-icon.eth-c{background:rgba(98,126,234,0.2);color:var(--eth-purple)}
.ticker-icon.usdt-c{background:rgba(38,161,123,0.2);color:var(--usdt-green)}
.ticker-icon.bnb-c{background:rgba(245,158,11,0.2);color:var(--gold)}
.ticker-name{font-weight:700;font-size:1.1rem;margin-bottom:4px}
.ticker-price{font-size:1.4rem;font-weight:800;margin-bottom:4px}
.ticker-change{font-size:0.9rem;font-weight:600}
.ticker-change.up{color:var(--usdt-green)}
.ticker-change.down{color:#ef4444}
.ticker-vol{color:var(--text-muted);font-size:0.8rem;margin-top:6px}

/* === Download Section === */
#download{background:var(--bg-card);padding:100px 0}
.download-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.download-card{background:var(--bg-dark);border:1px solid var(--border);border-radius:var(--radius-lg);padding:40px 32px;text-align:center;transition:var(--transition)}
.download-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.download-card.recommended{border-color:var(--blue);position:relative}
.download-card.recommended::before{content:'推荐';position:absolute;top:16px;right:16px;background:linear-gradient(135deg,var(--blue),var(--eth-purple));color:var(--white);padding:4px 14px;border-radius:50px;font-size:0.8rem;font-weight:700}
.download-icon{font-size:3rem;margin-bottom:16px}
.download-card h3{font-size:1.5rem;margin-bottom:8px}
.download-card p{color:var(--text-secondary);margin-bottom:24px}
.download-card .btn{width:100%;justify-content:center}

/* === CTA Section === */
#cta{position:relative;overflow:hidden;padding:100px 0;text-align:center}
#cta::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at center,var(--blue-glow) 0%,transparent 70%);pointer-events:none}
#cta h2{font-size:2.8rem;font-weight:900;margin-bottom:16px}
#cta p{color:var(--text-secondary);font-size:1.2rem;max-width:600px;margin:0 auto 32px}
.cta-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* === About Page === */
.about-hero{text-align:center;padding:140px 0 60px}
.about-hero h1{font-size:3rem;font-weight:900;margin-bottom:16px}
.about-hero h1 span{background:linear-gradient(135deg,var(--blue),var(--eth-purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.about-intro{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:60px 0}
.about-intro img{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}
.about-intro h2{font-size:2rem;font-weight:800;margin-bottom:20px}
.about-intro p{color:var(--text-secondary);margin-bottom:16px;line-height:1.8}
.timeline{position:relative;padding:60px 0}
.timeline::before{content:'';position:absolute;left:50%;top:0;bottom:0;width:2px;background:var(--border);transform:translateX(-50%)}
.timeline-item{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-bottom:50px;position:relative}
.timeline-item:nth-child(even){direction:rtl}
.timeline-item:nth-child(even) .timeline-content{direction:ltr}
.timeline-dot{position:absolute;left:50%;top:20px;width:16px;height:16px;background:var(--blue);border-radius:50%;transform:translate(-50%,-50%);box-shadow:0 0 20px var(--blue-glow);z-index:2}
.timeline-year{font-size:1.8rem;font-weight:900;color:var(--blue);text-align:right}
.timeline-item:nth-child(even) .timeline-year{text-align:left}
.timeline-content{background:var(--bg-card);padding:28px;border-radius:var(--radius-md);border:1px solid var(--border)}
.timeline-content h3{font-size:1.2rem;margin-bottom:8px;color:var(--white)}
.timeline-content p{color:var(--text-secondary);font-size:0.95rem}
.security-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:40px 0}
.security-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:28px;text-align:center;transition:var(--transition)}
.security-item:hover{border-color:var(--usdt-green);box-shadow:0 8px 25px var(--usdt-green-glow)}
.security-item .sec-icon{font-size:2.5rem;margin-bottom:12px}
.security-item h4{font-size:1.1rem;margin-bottom:8px;color:var(--white)}
.security-item p{color:var(--text-secondary);font-size:0.9rem}
.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:40px 0}
.team-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:24px;text-align:center;transition:var(--transition)}
.team-card:hover{transform:translateY(-4px);border-color:var(--blue)}
.team-card img{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;border:3px solid var(--blue)}
.team-card h4{font-size:1.05rem;margin-bottom:4px;color:var(--white)}
.team-card .role{color:var(--blue);font-size:0.85rem;margin-bottom:8px}
.team-card p{color:var(--text-muted);font-size:0.85rem}

/* === Services Page === */
.services-hero{text-align:center;padding:140px 0 60px}
.services-hero h1{font-size:3rem;font-weight:900;margin-bottom:16px}
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;padding-bottom:80px}
.service-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px 28px;transition:var(--transition);text-align:center}
.service-card:hover{transform:translateY(-6px);border-color:var(--blue);box-shadow:0 12px 40px rgba(37,99,235,0.15)}
.service-card .svc-icon{font-size:3rem;margin-bottom:16px}
.service-card h3{font-size:1.3rem;margin-bottom:12px;color:var(--white)}
.service-card p{color:var(--text-secondary);margin-bottom:20px;line-height:1.7}
.service-card .btn{margin-top:auto}
.service-compare{overflow-x:auto;padding-bottom:80px}
.service-compare table{width:100%;border-collapse:collapse;background:var(--bg-card);border-radius:var(--radius-md);overflow:hidden}
.service-compare th,.service-compare td{padding:16px 20px;text-align:center;border-bottom:1px solid var(--border)}
.service-compare th{background:var(--bg-dark);color:var(--blue);font-weight:700}
.service-compare td{color:var(--text-secondary);font-size:0.95rem}
.service-compare .check{color:var(--usdt-green);font-weight:700}

/* === FAQ Page === */
.faq-hero{text-align:center;padding:140px 0 60px}
.faq-hero h1{font-size:3rem;font-weight:900;margin-bottom:16px}
.faq-search{max-width:500px;margin:0 auto 40px}
.faq-search input{width:100%;padding:14px 20px;background:var(--bg-card);border:1px solid var(--border);border-radius:50px;color:var(--white);font-size:1rem;outline:none;transition:var(--transition)}
.faq-search input:focus{border-color:var(--blue);box-shadow:0 0 20px var(--blue-glow)}
.faq-categories{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:40px}
.faq-cat{padding:8px 20px;border:1px solid var(--border);border-radius:50px;cursor:pointer;font-size:0.9rem;color:var(--text-secondary);transition:var(--transition);background:transparent}
.faq-cat:hover,.faq-cat.active{background:var(--blue);border-color:var(--blue);color:var(--white)}
.faq-list{max-width:800px;margin:0 auto;padding-bottom:80px}
.faq-item{border:1px solid var(--border);border-radius:var(--radius-md);margin-bottom:12px;overflow:hidden;background:var(--bg-card);transition:var(--transition)}
.faq-item:hover{border-color:var(--border-light)}
.faq-item summary{padding:20px 24px;cursor:pointer;font-weight:600;font-size:1.05rem;color:var(--white);list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'▼';font-size:0.8rem;color:var(--text-muted);transition:var(--transition)}
.faq-item[open] summary::after{transform:rotate(180deg);color:var(--blue)}
.faq-item .faq-answer{padding:0 24px 20px;color:var(--text-secondary);line-height:1.8}

/* === Contact Page === */
.contact-hero{text-align:center;padding:140px 0 60px}
.contact-hero h1{font-size:3rem;font-weight:900;margin-bottom:16px}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;padding-bottom:80px}
.contact-form{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:40px}
.contact-form h3{font-size:1.5rem;margin-bottom:24px;color:var(--white)}
.form-group{margin-bottom:20px}
.form-group label{display:block;color:var(--text-secondary);margin-bottom:6px;font-size:0.9rem;font-weight:500}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:12px 16px;background:var(--bg-dark);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--white);font-size:0.95rem;transition:var(--transition);outline:none}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--blue)}
.form-group textarea{resize:vertical;min-height:120px}
.contact-info{display:flex;flex-direction:column;gap:24px}
.contact-info-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:24px;transition:var(--transition)}
.contact-info-card:hover{border-color:var(--blue)}
.contact-info-card h4{font-size:1.1rem;color:var(--white);margin-bottom:8px}
.contact-info-card p{color:var(--text-secondary);font-size:0.95rem}

/* === Footer === */
.site-footer{background:var(--bg-card);border-top:1px solid var(--border);padding:40px 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:30px}
.footer-brand .logo{font-size:1.3rem;margin-bottom:12px}
.footer-brand p{color:var(--text-muted);font-size:0.9rem;line-height:1.7}
.footer-col h4{color:var(--white);font-size:1rem;margin-bottom:16px}
.footer-col a{display:block;color:var(--text-muted);font-size:0.9rem;margin-bottom:10px;transition:var(--transition)}
.footer-col a:hover{color:var(--blue)}
.footer-bottom{border-top:1px solid var(--border);padding-top:20px;text-align:center;color:var(--text-muted);font-size:0.85rem}

/* === Animations === */
@keyframes btn-breathe{0%,100%{box-shadow:0 4px 20px var(--blue-glow)}50%{box-shadow:0 8px 35px var(--blue-glow),0 0 60px var(--eth-purple-glow)}}
@keyframes hero-float{0%,100%{transform:translate(0,0) rotate(0deg)}33%{transform:translate(1%,-1%) rotate(1deg)}66%{transform:translate(-1%,1%) rotate(-1deg)}}
@keyframes fadeInUp{from{opacity:0;transform:translateY(40px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:0.6}}
@keyframes ticker-flash{0%,100%{opacity:1}50%{opacity:0.7}}
@keyframes node-pulse{0%,100%{box-shadow:0 0 10px var(--blue-glow)}50%{box-shadow:0 0 30px var(--blue-glow),0 0 60px var(--eth-purple-glow)}}
@keyframes slideInLeft{from{opacity:0;transform:translateX(-50px)}to{opacity:1;transform:translateX(0)}}
@keyframes slideInRight{from{opacity:0;transform:translateX(50px)}to{opacity:1;transform:translateX(0)}}

.fade-in{animation:fadeInUp 0.8s ease forwards;opacity:0}
.fade-in-delay-1{animation-delay:0.2s}
.fade-in-delay-2{animation-delay:0.4s}
.fade-in-delay-3{animation-delay:0.6s}
.fade-in-delay-4{animation-delay:0.8s}
.fade-in-delay-5{animation-delay:1s}
.fade-in-delay-6{animation-delay:1.2s}

/* Reveal on scroll */
.reveal{opacity:0;transform:translateY(30px);transition:opacity 0.8s ease,transform 0.8s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* === Responsive === */
@media (max-width:1024px){
  .hero-content h1{font-size:2.5rem}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .ticker-grid{grid-template-columns:repeat(2,1fr)}
  .services-grid{grid-template-columns:repeat(2,1fr)}
  .security-grid{grid-template-columns:repeat(2,1fr)}
  .team-grid{grid-template-columns:repeat(2,1fr)}
  .about-intro{grid-template-columns:1fr}
}
@media (max-width:768px){
  .hamburger{display:flex}
  .nav-links{position:fixed;top:72px;left:0;width:100%;background:rgba(10,15,26,0.98);backdrop-filter:blur(20px);flex-direction:column;padding:24px;gap:20px;transform:translateY(-120%);transition:transform 0.4s ease;border-bottom:1px solid var(--border)}
  .nav-links.active{transform:translateY(0)}
  #hero .container{grid-template-columns:1fr;text-align:center}
  .hero-tags,.hero-btns{justify-content:center}
  .hero-image{order:-1}
  .section-header h2{font-size:2rem}
  .features-grid{grid-template-columns:1fr}
  .ticker-grid{grid-template-columns:repeat(2,1fr)}
  .download-grid{grid-template-columns:1fr}
  .services-grid{grid-template-columns:1fr}
  .security-grid{grid-template-columns:1fr}
  .team-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .timeline::before{left:30px}
  .timeline-item{grid-template-columns:1fr;padding-left:60px}
  .timeline-item:nth-child(even){direction:ltr}
  .timeline-dot{left:30px}
  .timeline-year{text-align:left!important}
  .cta-btns{flex-direction:column;align-items:center}
  #hero{min-height:auto;padding:120px 0 60px}
  .hero-content h1{font-size:2rem}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:480px){
  .hero-content h1{font-size:1.7rem}
  .section-header h2{font-size:1.6rem}
  .stat-num{font-size:2rem!important}
  .ticker-grid{grid-template-columns:1fr}
  .btn{padding:12px 24px;font-size:0.9rem}
}

/* === Node Animation for Network Visual === */
.node-network{display:flex;justify-content:center;align-items:center;gap:20px;flex-wrap:wrap;padding:30px 0}
.node-dot{width:12px;height:12px;border-radius:50%;background:var(--blue);animation:node-pulse 2s ease-in-out infinite}
.node-dot:nth-child(2){animation-delay:0.3s;background:var(--eth-purple)}
.node-dot:nth-child(3){animation-delay:0.6s;background:var(--btc-orange)}
.node-dot:nth-child(4){animation-delay:0.9s;background:var(--usdt-green)}
.node-dot:nth-child(5){animation-delay:1.2s;background:var(--gold)}
.node-line{width:40px;height:1px;background:var(--border-light)}

/* === Breadcrumb === */
.breadcrumb{padding:100px 0 0;color:var(--text-muted);font-size:0.9rem}
.breadcrumb a{color:var(--text-secondary);transition:var(--transition)}
.breadcrumb a:hover{color:var(--blue)}