/* ============================================
   欧交易所app官方下载 - 全球领先的数字资产交易平台
   配色：深色(#0a0f1a) + 欧蓝(#2563eb) + 比特币橙(#f7931a) + 领先金(#f59e0b) + 合规绿(#10b981) + 白
   ============================================ */

/* === Reset & Base === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg-dark:#0a0f1a;
  --bg-card:#111827;
  --bg-section:#0d1321;
  --ou-blue:#2563eb;
  --ou-blue-hover:#1d4ed8;
  --btc-orange:#f7931a;
  --btc-orange-hover:#e07d0a;
  --gold:#f59e0b;
  --gold-light:#fbbf24;
  --green:#10b981;
  --green-hover:#059669;
  --white:#ffffff;
  --gray-100:#f3f4f6;
  --gray-200:#e5e7eb;
  --gray-300:#d1d5db;
  --gray-400:#9ca3af;
  --gray-500:#6b7280;
  --gray-600:#4b5563;
  --gray-700:#374151;
  --radius:12px;
  --radius-lg:16px;
  --shadow:0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg:0 8px 40px rgba(0,0,0,0.5);
  --transition:0.3s ease;
}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC",sans-serif;
  background:var(--bg-dark);
  color:var(--gray-200);
  line-height:1.7;
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* === Animations === */
@keyframes fadeInUp{
  from{opacity:0;transform:translateY(40px)}
  to{opacity:1;transform:translateY(0)}
}
@keyframes fadeIn{
  from{opacity:0}
  to{opacity:1}
}
@keyframes pulse{
  0%,100%{box-shadow:0 0 0 0 rgba(247,147,26,0.4)}
  50%{box-shadow:0 0 0 20px rgba(247,147,26,0)}
}
@keyframes priceFluctuation{
  0%,100%{color:var(--btc-orange)}
  50%{color:var(--green)}
}
@keyframes newsScroll{
  0%{transform:translateY(0)}
  100%{transform:translateY(-50%)}
}
@keyframes gradientShift{
  0%{background-position:0% 50%}
  50%{background-position:100% 50%}
  100%{background-position:0% 50%}
}
@keyframes glowPulse{
  0%,100%{opacity:0.6}
  50%{opacity:1}
}
.reveal{opacity:0;transform:translateY(30px);transition:all 0.6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* === Header & Navigation === */
header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(10,15,26,0.95);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(37,99,235,0.15);
  transition:var(--transition);
}
header.scrolled{box-shadow:0 4px 30px rgba(0,0,0,0.5)}
header nav{
  display:flex;align-items:center;justify-content:space-between;
  max-width:1200px;margin:0 auto;padding:0 20px;height:70px;
}
.logo{
  font-size:1.5rem;font-weight:800;
  background:linear-gradient(135deg,var(--btc-orange),var(--gold));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
  letter-spacing:1px;
}
.nav-links{display:flex;gap:32px;align-items:center}
.nav-links a{
  font-size:0.95rem;font-weight:500;color:var(--gray-300);
  transition:var(--transition);position:relative;padding:4px 0;
}
.nav-links a::after{
  content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;
  background:var(--btc-orange);transition:var(--transition);
}
.nav-links a:hover,.nav-links a.active{color:var(--white)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-cta{
  background:linear-gradient(135deg,var(--btc-orange),var(--gold));
  color:var(--bg-dark)!important;padding:8px 20px!important;
  border-radius:50px;font-weight:700!important;font-size:0.85rem!important;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 4px 20px rgba(247,147,26,0.4)}
.nav-cta::after{display:none!important}
.menu-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px}
.menu-toggle span{display:block;width:24px;height:2px;background:var(--white);margin:5px 0;transition:var(--transition)}

/* === Hero Section === */
#hero{
  padding:140px 0 80px;position:relative;overflow:hidden;
  background:radial-gradient(ellipse at 50% 0%,rgba(37,99,235,0.15) 0%,transparent 70%),
             radial-gradient(ellipse at 80% 20%,rgba(247,147,26,0.08) 0%,transparent 50%);
}
#hero::before{
  content:'';position:absolute;top:0;left:0;right:0;bottom:0;
  background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 60 60"><circle cx="30" cy="30" r="1" fill="%232563eb" opacity="0.3"/></svg>') repeat;
  background-size:60px 60px;
}
.hero-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;
  position:relative;z-index:1;
}
.hero-content h1{
  font-size:3rem;font-weight:900;line-height:1.2;margin-bottom:20px;
  background:linear-gradient(135deg,var(--white),var(--gold-light));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-content h1 span{color:var(--btc-orange);-webkit-text-fill-color:var(--btc-orange)}
.hero-content p{
  font-size:1.15rem;color:var(--gray-400);margin-bottom:12px;line-height:1.8;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.hero-tags span{
  background:rgba(37,99,235,0.1);border:1px solid rgba(37,99,235,0.2);
  color:var(--ou-blue);padding:6px 16px;border-radius:50px;
  font-size:0.85rem;font-weight:500;
}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 32px;border-radius:50px;font-size:1rem;font-weight:700;
  cursor:pointer;border:none;transition:var(--transition);
  text-decoration:none;letter-spacing:0.5px;
}
.btn-primary{
  background:linear-gradient(135deg,var(--btc-orange),var(--gold));
  color:var(--bg-dark);animation:pulse 2s infinite;
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 30px rgba(247,147,26,0.4)}
.btn-secondary{
  background:transparent;color:var(--white);
  border:2px solid var(--ou-blue);
}
.btn-secondary:hover{background:var(--ou-blue);transform:translateY(-3px)}
.btn-outline{
  background:transparent;color:var(--btc-orange);
  border:2px solid var(--btc-orange);
}
.btn-outline:hover{background:var(--btc-orange);color:var(--bg-dark)}
.hero-image img{
  border-radius:var(--radius-lg);
  box-shadow:0 20px 60px rgba(37,99,235,0.2);
  animation:fadeInUp 1s ease;
}

/* === Market Ticker === */
#market-ticker{
  padding:40px 0;background:var(--bg-card);
  border-top:1px solid rgba(247,147,26,0.1);
  border-bottom:1px solid rgba(247,147,26,0.1);
}
.ticker-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center;
}
.ticker-item{padding:20px;background:rgba(10,15,26,0.5);border-radius:var(--radius)}
.ticker-label{font-size:0.8rem;color:var(--gray-500);text-transform:uppercase;letter-spacing:1px;margin-bottom:8px}
.ticker-value{font-size:1.8rem;font-weight:800;animation:priceFluctuation 3s ease infinite}
.ticker-change{font-size:0.9rem;color:var(--green);font-weight:600}
.ticker-change.down{color:#ef4444}

/* === Section Common === */
.section-header{text-align:center;margin-bottom:60px}
.section-header h2{
  font-size:2.2rem;font-weight:800;margin-bottom:12px;color:var(--white);
}
.section-header p{color:var(--gray-400);font-size:1.05rem;max-width:600px;margin:0 auto}
section{padding:80px 0}

/* === Features Section === */
#features{background:var(--bg-section)}
.features-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.feature-card{
  background:var(--bg-card);border:1px solid rgba(37,99,235,0.1);
  border-radius:var(--radius-lg);padding:32px 24px;
  transition:var(--transition);position:relative;overflow:hidden;
}
.feature-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--btc-orange),var(--gold));
  transform:scaleX(0);transition:transform 0.4s ease;
}
.feature-card:hover::before{transform:scaleX(1)}
.feature-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:var(--btc-orange)}
.feature-icon{
  width:56px;height:56px;border-radius:var(--radius);
  display:flex;align-items:center;justify-content:center;
  font-size:1.8rem;margin-bottom:20px;
}
.feature-icon.blue{background:rgba(37,99,235,0.15);color:var(--ou-blue)}
.feature-icon.orange{background:rgba(247,147,26,0.15);color:var(--btc-orange)}
.feature-icon.gold{background:rgba(245,158,11,0.15);color:var(--gold)}
.feature-icon.green{background:rgba(16,185,129,0.15);color:var(--green)}
.feature-card h3{font-size:1.15rem;font-weight:700;margin-bottom:10px;color:var(--white)}
.feature-card p{color:var(--gray-400);font-size:0.9rem;line-height:1.7}

/* === Stats Section === */
#stats{padding:50px 0}
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center;
}
.stat-item{padding:24px}
.stat-number{font-size:2.5rem;font-weight:900;margin-bottom:4px}
.stat-number.blue{color:var(--ou-blue)}
.stat-number.orange{color:var(--btc-orange)}
.stat-number.gold{color:var(--gold)}
.stat-number.green{color:var(--green)}
.stat-label{font-size:0.9rem;color:var(--gray-500)}

/* === News Section === */
#news{background:var(--bg-section)}
.news-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:24px;
}
.news-card{
  background:var(--bg-card);border-radius:var(--radius-lg);
  overflow:hidden;transition:var(--transition);
  border:1px solid rgba(37,99,235,0.08);
}
.news-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.news-card img{width:100%;height:200px;object-fit:cover}
.news-body{padding:20px}
.news-date{font-size:0.8rem;color:var(--gray-500);margin-bottom:8px}
.news-body h3{font-size:1.1rem;font-weight:700;color:var(--white);margin-bottom:8px;line-height:1.4}
.news-body p{color:var(--gray-400);font-size:0.9rem;line-height:1.6}
.news-body a{color:var(--btc-orange);font-weight:600;font-size:0.9rem;display:inline-block;margin-top:8px}
.news-body a:hover{text-decoration:underline}

/* === CTA Section === */
#cta{
  text-align:center;
  background:linear-gradient(135deg,rgba(37,99,235,0.1),rgba(247,147,26,0.05));
  position:relative;overflow:hidden;
}
#cta::before{
  content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;
  background:radial-gradient(circle,rgba(247,147,26,0.03) 0%,transparent 70%);
  animation:gradientShift 8s ease infinite;background-size:200% 200%;
}
#cta .container{position:relative;z-index:1}
#cta h2{font-size:2.2rem;font-weight:800;margin-bottom:16px;color:var(--white)}
#cta p{color:var(--gray-400);font-size:1.1rem;margin-bottom:32px;max-width:600px;margin-left:auto;margin-right:auto}
.cta-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* === About Page === */
.about-hero{padding:140px 0 60px;text-align:center}
.about-hero h1{font-size:2.5rem;font-weight:900;color:var(--white);margin-bottom:16px}
.about-hero p{color:var(--gray-400);max-width:700px;margin:0 auto;font-size:1.1rem;line-height:1.8}
.about-content{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:60px 0}
.about-content.reverse{direction:rtl}
.about-content.reverse>*{direction:ltr}
.about-text h2{font-size:1.8rem;font-weight:800;color:var(--white);margin-bottom:16px}
.about-text p{color:var(--gray-400);margin-bottom:12px;line-height:1.8}
.about-text ul{list-style:none;padding:0}
.about-text ul li{padding:8px 0 8px 28px;position:relative;color:var(--gray-300)}
.about-text ul li::before{
  content:'\2713';position:absolute;left:0;color:var(--green);font-weight:700;
}
.about-image img{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}

.timeline{position:relative;padding:40px 0}
.timeline::before{
  content:'';position:absolute;left:50%;top:0;bottom:0;width:2px;
  background:linear-gradient(180deg,var(--btc-orange),var(--ou-blue));
  transform:translateX(-50%);
}
.timeline-item{
  display:flex;align-items:flex-start;margin-bottom:40px;position:relative;
}
.timeline-item:nth-child(odd){flex-direction:row;padding-right:calc(50% + 40px)}
.timeline-item:nth-child(even){flex-direction:row-reverse;padding-left:calc(50% + 40px)}
.timeline-dot{
  position:absolute;left:50%;top:0;transform:translateX(-50%);
  width:16px;height:16px;background:var(--btc-orange);border-radius:50%;
  border:3px solid var(--bg-dark);z-index:1;
}
.timeline-content{
  background:var(--bg-card);padding:20px 24px;border-radius:var(--radius);
  border:1px solid rgba(37,99,235,0.1);
}
.timeline-content h3{color:var(--btc-orange);font-size:1rem;margin-bottom:6px}
.timeline-content p{color:var(--gray-400);font-size:0.9rem}

/* === Services Page === */
.services-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.service-card{
  background:var(--bg-card);border:1px solid rgba(37,99,235,0.1);
  border-radius:var(--radius-lg);padding:32px 24px;
  transition:var(--transition);text-align:center;
}
.service-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:var(--btc-orange)}
.service-icon{
  width:64px;height:64px;margin:0 auto 20px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:1.6rem;
}
.service-card h3{font-size:1.2rem;font-weight:700;color:var(--white);margin-bottom:12px}
.service-card p{color:var(--gray-400);font-size:0.9rem;line-height:1.7;margin-bottom:16px}
.service-card ul{text-align:left;color:var(--gray-400);font-size:0.85rem}
.service-card ul li{padding:4px 0 4px 20px;position:relative}
.service-card ul li::before{content:'\2022';position:absolute;left:4px;color:var(--btc-orange)}

/* === FAQ Page === */
.faq-search{margin-bottom:40px;text-align:center}
.faq-search input{
  width:100%;max-width:500px;padding:14px 20px;
  background:var(--bg-card);border:1px solid rgba(37,99,235,0.2);
  border-radius:50px;color:var(--white);font-size:1rem;outline:none;
  transition:var(--transition);
}
.faq-search input:focus{border-color:var(--btc-orange);box-shadow:0 0 0 3px rgba(247,147,26,0.1)}
.faq-categories{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:40px}
.faq-cat{
  padding:8px 20px;border-radius:50px;font-size:0.85rem;font-weight:600;
  cursor:pointer;transition:var(--transition);
  background:var(--bg-card);color:var(--gray-400);border:1px solid rgba(37,99,235,0.1);
}
.faq-cat:hover,.faq-cat.active{background:var(--btc-orange);color:var(--bg-dark);border-color:var(--btc-orange)}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{
  background:var(--bg-card);border:1px solid rgba(37,99,235,0.08);
  border-radius:var(--radius);margin-bottom:12px;overflow:hidden;
  transition:var(--transition);
}
.faq-item:hover{border-color:rgba(247,147,26,0.3)}
.faq-item summary{
  padding:18px 24px;cursor:pointer;font-weight:600;color:var(--white);
  font-size:1rem;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:1.4rem;color:var(--btc-orange);transition:var(--transition);
}
.faq-item[open] summary::after{content:'-'}
.faq-item .faq-answer{padding:0 24px 20px;color:var(--gray-400);font-size:0.95rem;line-height:1.8}

/* === Contact Page === */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-form-wrapper{background:var(--bg-card);padding:40px;border-radius:var(--radius-lg);border:1px solid rgba(37,99,235,0.1)}
.contact-form-wrapper h2{font-size:1.5rem;font-weight:700;color:var(--white);margin-bottom:24px}
.form-group{margin-bottom:20px}
.form-group label{display:block;color:var(--gray-300);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 rgba(37,99,235,0.15);border-radius:var(--radius);
  color:var(--white);font-size:0.95rem;outline:none;transition:var(--transition);
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  border-color:var(--btc-orange);box-shadow:0 0 0 3px rgba(247,147,26,0.1);
}
.form-group textarea{resize:vertical;min-height:120px}
.form-submit{
  width:100%;padding:14px;background:linear-gradient(135deg,var(--btc-orange),var(--gold));
  color:var(--bg-dark);font-size:1rem;font-weight:700;border:none;border-radius:50px;
  cursor:pointer;transition:var(--transition);
}
.form-submit:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(247,147,26,0.4)}

.contact-info-side{display:flex;flex-direction:column;gap:20px}
.contact-info-card{
  background:var(--bg-card);padding:24px;border-radius:var(--radius);
  border:1px solid rgba(37,99,235,0.1);transition:var(--transition);
}
.contact-info-card:hover{border-color:var(--btc-orange)}
.contact-info-card h3{color:var(--white);font-size:1.1rem;margin-bottom:8px}
.contact-info-card p{color:var(--gray-400);font-size:0.9rem}

/* === Footer === */
footer{
  background:var(--bg-card);border-top:1px solid rgba(37,99,235,0.1);
  padding:50px 0 30px;text-align:center;
}
.footer-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:30px;text-align:left;
  margin-bottom:40px;
}
.footer-col h4{color:var(--white);font-size:1rem;margin-bottom:16px;font-weight:700}
.footer-col a{display:block;color:var(--gray-500);font-size:0.9rem;padding:6px 0;transition:var(--transition)}
.footer-col a:hover{color:var(--btc-orange)}
.footer-bottom{
  border-top:1px solid rgba(37,99,235,0.08);padding-top:24px;
  color:var(--gray-500);font-size:0.85rem;
}

/* === Compliance Badge === */
.compliance-bar{
  background:rgba(16,185,129,0.08);border:1px solid rgba(16,185,129,0.2);
  border-radius:var(--radius);padding:16px 24px;display:flex;
  align-items:center;gap:12px;color:var(--green);
  font-size:0.9rem;font-weight:600;
}

/* === Tables === */
.table-wrapper{overflow-x:auto;margin:30px 0}
table{width:100%;border-collapse:collapse;font-size:0.9rem}
th,td{padding:14px 16px;text-align:left;border-bottom:1px solid rgba(37,99,235,0.08)}
th{background:rgba(37,99,235,0.08);color:var(--white);font-weight:700;font-size:0.85rem;text-transform:uppercase;letter-spacing:0.5px}
td{color:var(--gray-400)}
tr:hover td{background:rgba(247,147,26,0.03)}

/* === Toast === */
.toast{
  position:fixed;bottom:30px;right:30px;z-index:9999;
  background:var(--green);color:var(--white);padding:14px 24px;
  border-radius:50px;font-weight:600;box-shadow:var(--shadow);
  animation:fadeInUp 0.4s ease;display:none;
}
.toast.error{background:#ef4444}
.toast.show{display:block}

/* === Responsive === */
@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr;text-align:center}
  .hero-btns,.hero-tags,.cta-btns{justify-content:center}
  .hero-image{max-width:500px;margin:0 auto}
  .features-grid,.services-grid{grid-template-columns:repeat(2,1fr)}
  .ticker-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .about-content{grid-template-columns:1fr;gap:30px}
  .contact-grid{grid-template-columns:1fr}
  .timeline::before{left:20px}
  .timeline-item:nth-child(odd){padding-right:0;padding-left:50px;flex-direction:row}
  .timeline-item:nth-child(even){padding-left:50px;flex-direction:row}
  .timeline-dot{left:20px}
}
@media(max-width:768px){
  h1{font-size:2rem!important}
  h2{font-size:1.6rem!important}
  .nav-links{display:none;position:absolute;top:70px;left:0;right:0;background:var(--bg-card);flex-direction:column;padding:20px;gap:16px;border-top:1px solid rgba(37,99,235,0.1)}
  .nav-links.open{display:flex}
  .menu-toggle{display:block}
  .features-grid,.services-grid{grid-template-columns:1fr}
  .ticker-grid,.stats-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  section{padding:50px 0}
  #hero{padding:110px 0 50px}
  .hero-content h1{font-size:2rem!important}
}