/* ========================================
   Gate官网下载 - 全球顶级加密货币交易平台
   配色：深色(#0d1117) + Gate青绿(#17c3b2) + 全球金(#f59e0b) + 安全蓝(#2563eb) + 白
   ======================================== */

/* --- 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","PingFang SC","Microsoft YaHei",sans-serif;background:#0d1117;color:#e6edf3;line-height:1.7;overflow-x:hidden}

a{color:#17c3b2;text-decoration:none;transition:color 0.3s}
a:hover{color:#f59e0b}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}

/* --- Container --- */
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* --- Header & Nav --- */
header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(13,17,23,0.95);backdrop-filter:blur(12px);border-bottom:1px solid rgba(23,195,178,0.15);transition:all 0.3s}
header.scrolled{box-shadow:0 4px 30px rgba(23,195,178,0.1)}
header .container{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{font-size:1.6rem;font-weight:800;color:#17c3b2;letter-spacing:1px}
.logo span{color:#f59e0b}
nav ul{display:flex;gap:30px}
nav a{color:#c9d1d9;font-size:0.95rem;font-weight:500;position:relative;padding:4px 0}
nav a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:#17c3b2;transition:width 0.3s}
nav a:hover::after,nav a.active::after{width:100%}
nav a:hover,nav a.active{color:#17c3b2}
.menu-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* --- Hero Section --- */
.hero{padding:140px 0 80px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;right:-20%;width:700px;height:700px;background:radial-gradient(circle,rgba(23,195,178,0.08),transparent 70%);border-radius:50%;pointer-events:none}
.hero::after{content:'';position:absolute;bottom:-30%;left:-10%;width:500px;height:500px;background:radial-gradient(circle,rgba(37,99,235,0.06),transparent 70%);border-radius:50%;pointer-events:none}
.hero .container{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,#17c3b2,#f59e0b);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-content h1 .sub{display:block;font-size:1.3rem;font-weight:400;color:#8b949e;margin-top:8px;-webkit-text-fill-color:#8b949e}
.hero-content p{font-size:1.1rem;color:#8b949e;margin-bottom:30px;max-width:500px}
.hero-stats{display:flex;gap:30px;margin-bottom:30px;flex-wrap:wrap}
.hero-stats .stat{text-align:center}
.hero-stats .stat .num{display:block;font-size:2rem;font-weight:800;color:#17c3b2}
.hero-stats .stat .label{font-size:0.85rem;color:#8b949e}
.hero-btns{display:flex;gap:15px;flex-wrap:wrap}
.hero-image{display:flex;justify-content:center;align-items:center}
.hero-image img{border-radius:20px;box-shadow:0 20px 60px rgba(23,195,178,0.15);transition:transform 0.5s}
.hero-image img:hover{transform:translateY(-8px)}

/* --- Buttons --- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:50px;font-weight:600;font-size:1rem;cursor:pointer;transition:all 0.3s;border:none;position:relative;overflow:hidden}
.btn-primary{background:linear-gradient(135deg,#17c3b2,#14a89a);color:#fff;box-shadow:0 4px 20px rgba(23,195,178,0.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(23,195,178,0.4);animation:btnPulse 2s infinite}
.btn-secondary{background:transparent;color:#17c3b2;border:2px solid #17c3b2}
.btn-secondary:hover{background:rgba(23,195,178,0.1);transform:translateY(-2px);box-shadow:0 4px 20px rgba(23,195,178,0.15)}
.btn-gold{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;box-shadow:0 4px 20px rgba(245,158,11,0.3)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(245,158,11,0.4)}
.btn-blue{background:linear-gradient(135deg,#2563eb,#1d4ed8);color:#fff;box-shadow:0 4px 20px rgba(37,99,235,0.3)}
.btn-blue:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(37,99,235,0.4)}
@keyframes btnPulse{0%,100%{box-shadow:0 4px 20px rgba(23,195,178,0.3)}50%{box-shadow:0 8px 40px rgba(23,195,178,0.5)}}
.btn::after{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.2),transparent);transition:left 0.5s}
.btn:hover::after{left:100%}

/* --- Section Titles --- */
.section-title{text-align:center;margin-bottom:60px}
.section-title h2{font-size:2.2rem;font-weight:800;color:#e6edf3;margin-bottom:12px}
.section-title h2 span{color:#17c3b2}
.section-title p{color:#8b949e;font-size:1.05rem;max-width:700px;margin:0 auto}

/* --- Features --- */
.features{padding:80px 0;background:rgba(22,27,34,0.3)}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.feature-card{background:rgba(22,27,34,0.8);border:1px solid rgba(23,195,178,0.1);border-radius:16px;padding:35px 25px;text-align:center;transition:all 0.4s;opacity:0;transform:translateY(30px)}
.feature-card.revealed{opacity:1;transform:translateY(0)}
.feature-card:hover{transform:translateY(-8px);border-color:#17c3b2;box-shadow:0 12px 40px rgba(23,195,178,0.15)}
.feature-card .icon{width:70px;height:70px;margin:0 auto 20px;border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:2rem}
.feature-card .icon.green{background:rgba(23,195,178,0.1);color:#17c3b2}
.feature-card .icon.blue{background:rgba(37,99,235,0.1);color:#2563eb}
.feature-card .icon.gold{background:rgba(245,158,11,0.1);color:#f59e0b}
.feature-card h3{font-size:1.2rem;margin-bottom:10px;color:#e6edf3}
.feature-card p{color:#8b949e;font-size:0.95rem}

/* --- Download Guide --- */
.download-guide{padding:80px 0}
.download-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.download-card{background:rgba(22,27,34,0.8);border:1px solid rgba(23,195,178,0.1);border-radius:16px;padding:40px 25px;text-align:center;transition:all 0.4s;position:relative;overflow:hidden}
.download-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#17c3b2,#f59e0b,#2563eb);opacity:0;transition:opacity 0.4s}
.download-card:hover{transform:translateY(-10px);box-shadow:0 20px 50px rgba(23,195,178,0.12)}
.download-card:hover::before{opacity:1}
.download-card .platform-icon{font-size:3rem;margin-bottom:15px;color:#17c3b2}
.download-card h3{font-size:1.3rem;margin-bottom:8px;color:#e6edf3}
.download-card p{color:#8b949e;font-size:0.9rem;margin-bottom:20px}
.download-card img{width:120px;height:120px;margin:0 auto 20px;border-radius:16px}

/* --- CTA --- */
.cta-section{padding:80px 0;text-align:center;position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at center,rgba(23,195,178,0.06),transparent 70%);pointer-events:none}
.cta-section h2{font-size:2.2rem;font-weight:800;margin-bottom:16px;color:#e6edf3}
.cta-section p{color:#8b949e;margin-bottom:30px;font-size:1.1rem}
.cta-btns{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}

/* --- Global Map --- */
.global-section{padding:80px 0;text-align:center}
.global-section .map-container{position:relative;max-width:800px;margin:0 auto 40px}
.global-section .map-container img{border-radius:16px;opacity:0.7}
.global-dots{display:flex;justify-content:center;gap:60px;flex-wrap:wrap;margin-top:30px}
.global-dots .dot{text-align:center}
.global-dots .dot .num{display:block;font-size:2.5rem;font-weight:900;color:#17c3b2}
.global-dots .dot .label{color:#8b949e;font-size:0.95rem}

/* --- About Page --- */
.about-hero{padding:140px 0 60px;text-align:center}
.about-hero h1{font-size:2.8rem;font-weight:900;color:#17c3b2;margin-bottom:15px}
.about-hero p{color:#8b949e;font-size:1.1rem;max-width:700px;margin:0 auto}
.about-content{padding:60px 0}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;margin-bottom:60px}
.about-grid.reverse{direction:rtl}
.about-grid.reverse>*{direction:ltr}
.about-text h2{font-size:1.8rem;font-weight:800;color:#e6edf3;margin-bottom:16px}
.about-text h2 span{color:#17c3b2}
.about-text p{color:#8b949e;margin-bottom:15px;font-size:1rem;line-height:1.8}
.about-image img{border-radius:16px}

/* --- Timeline --- */
.timeline{padding:60px 0}
.timeline-item{display:flex;gap:30px;margin-bottom:40px;position:relative;opacity:0;transform:translateX(-30px);transition:all 0.6s}
.timeline-item.revealed{opacity:1;transform:translateX(0)}
.timeline-item::before{content:'';position:absolute;left:19px;top:0;bottom:-40px;width:2px;background:rgba(23,195,178,0.2)}
.timeline-item:last-child::before{display:none}
.timeline-year{min-width:40px;height:40px;background:#17c3b2;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;color:#0d1117;font-size:0.8rem;position:relative;z-index:1;flex-shrink:0}
.timeline-body h3{font-size:1.1rem;color:#e6edf3;margin-bottom:6px}
.timeline-body p{color:#8b949e;font-size:0.95rem}

/* --- Security Grid --- */
.security-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;padding:60px 0}
.security-item{background:rgba(22,27,34,0.8);border:1px solid rgba(37,99,235,0.1);border-radius:12px;padding:25px;text-align:center;transition:all 0.3s}
.security-item:hover{border-color:#2563eb;transform:translateY(-4px);box-shadow:0 8px 30px rgba(37,99,235,0.1)}
.security-item .icon{font-size:2.5rem;color:#2563eb;margin-bottom:12px}
.security-item h3{font-size:1.05rem;color:#e6edf3;margin-bottom:8px}
.security-item p{color:#8b949e;font-size:0.9rem}

/* --- Team Grid --- */
.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:25px;padding:60px 0}
.team-card{text-align:center;opacity:0;transform:translateY(30px);transition:all 0.5s}
.team-card.revealed{opacity:1;transform:translateY(0)}
.team-card img{width:120px;height:120px;border-radius:50%;margin:0 auto 15px;border:3px solid rgba(23,195,178,0.2);transition:border-color 0.3s}
.team-card:hover img{border-color:#17c3b2}
.team-card h3{font-size:1.1rem;color:#e6edf3;margin-bottom:4px}
.team-card .role{color:#17c3b2;font-size:0.9rem;margin-bottom:8px}
.team-card p{color:#8b949e;font-size:0.85rem}

/* --- Services Page --- */
.services-hero{padding:140px 0 60px;text-align:center}
.services-hero h1{font-size:2.8rem;font-weight:900;color:#17c3b2;margin-bottom:15px}
.services-hero p{color:#8b949e;font-size:1.1rem;max-width:700px;margin:0 auto}
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;padding:60px 0}
.service-card{background:rgba(22,27,34,0.8);border:1px solid rgba(23,195,178,0.08);border-radius:16px;padding:30px;transition:all 0.4s;opacity:0;transform:translateY(30px)}
.service-card.revealed{opacity:1;transform:translateY(0)}
.service-card:hover{transform:translateY(-6px);border-color:#17c3b2;box-shadow:0 12px 40px rgba(23,195,178,0.1)}
.service-card .icon{font-size:2.5rem;color:#17c3b2;margin-bottom:15px}
.service-card h3{font-size:1.2rem;color:#e6edf3;margin-bottom:10px}
.service-card p{color:#8b949e;font-size:0.95rem;margin-bottom:10px}
.service-card ul{color:#8b949e;font-size:0.9rem;padding-left:18px}
.service-card ul li{list-style:disc;margin-bottom:4px}

/* --- Service Table --- */
.service-table-wrap{padding:40px 0 80px;overflow-x:auto}
.service-table{width:100%;border-collapse:collapse;background:rgba(22,27,34,0.6);border-radius:12px;overflow:hidden}
.service-table th{background:rgba(23,195,178,0.1);color:#17c3b2;padding:14px 16px;text-align:left;font-weight:600;font-size:0.95rem}
.service-table td{padding:14px 16px;color:#c9d1d9;border-bottom:1px solid rgba(23,195,178,0.06);font-size:0.9rem}
.service-table tr:hover td{background:rgba(23,195,178,0.03)}
.service-table .check{color:#17c3b2;font-weight:bold}

/* --- FAQ Page --- */
.faq-hero{padding:140px 0 30px;text-align:center}
.faq-hero h1{font-size:2.8rem;font-weight:900;color:#17c3b2;margin-bottom:15px}
.faq-hero p{color:#8b949e;font-size:1.1rem}
.faq-search{max-width:500px;margin:0 auto 40px}
.faq-search input{width:100%;padding:14px 20px;border-radius:50px;border:1px solid rgba(23,195,178,0.2);background:rgba(22,27,34,0.8);color:#e6edf3;font-size:1rem;outline:none;transition:border-color 0.3s}
.faq-search input:focus{border-color:#17c3b2;box-shadow:0 0 20px rgba(23,195,178,0.1)}
.faq-categories{display:flex;justify-content:center;gap:10px;margin-bottom:40px;flex-wrap:wrap}
.faq-cat{padding:8px 20px;border-radius:50px;background:rgba(22,27,34,0.8);border:1px solid rgba(23,195,178,0.1);color:#c9d1d9;cursor:pointer;transition:all 0.3s;font-size:0.9rem}
.faq-cat:hover,.faq-cat.active{background:rgba(23,195,178,0.15);border-color:#17c3b2;color:#17c3b2}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{margin-bottom:12px;border-radius:12px;overflow:hidden;border:1px solid rgba(23,195,178,0.08);background:rgba(22,27,34,0.6);transition:all 0.3s}
.faq-item summary{padding:16px 20px;cursor:pointer;font-weight:600;color:#e6edf3;font-size:1rem;display:flex;justify-content:space-between;align-items:center;user-select:none}
.faq-item summary::after{content:'+';font-size:1.3rem;color:#17c3b2;transition:transform 0.3s}
.faq-item[open] summary::after{content:'−';transform:rotate(180deg)}
.faq-item .answer{padding:0 20px 20px;color:#8b949e;font-size:0.95rem;line-height:1.8}
.faq-item:hover{border-color:rgba(23,195,178,0.2)}
.faq-item[open]{border-color:#17c3b2;box-shadow:0 4px 20px rgba(23,195,178,0.08)}

/* --- Contact Page --- */
.contact-hero{padding:140px 0 40px;text-align:center}
.contact-hero h1{font-size:2.8rem;font-weight:900;color:#17c3b2;margin-bottom:15px}
.contact-hero p{color:#8b949e;font-size:1.1rem}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;padding:40px 0 80px}
.contact-form-wrap h2,.contact-info-wrap h2{font-size:1.5rem;color:#e6edf3;margin-bottom:20px}
.contact-form{display:flex;flex-direction:column;gap:16px}
.contact-form input,.contact-form select,.contact-form textarea{padding:14px 16px;border-radius:10px;border:1px solid rgba(23,195,178,0.15);background:rgba(22,27,34,0.8);color:#e6edf3;font-size:0.95rem;outline:none;transition:all 0.3s}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{border-color:#17c3b2;box-shadow:0 0 15px rgba(23,195,178,0.08)}
.contact-form textarea{resize:vertical;min-height:140px}
.contact-form select option{background:#0d1117;color:#e6edf3}
.contact-info-item{display:flex;gap:15px;margin-bottom:20px;align-items:flex-start}
.contact-info-item .icon{font-size:1.5rem;color:#17c3b2;flex-shrink:0}
.contact-info-item h3{font-size:1rem;color:#e6edf3;margin-bottom:4px}
.contact-info-item p{color:#8b949e;font-size:0.9rem}
.social-links{display:flex;gap:15px;margin-top:20px;flex-wrap:wrap}
.social-links a{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:50px;border:1px solid rgba(23,195,178,0.2);color:#c9d1d9;transition:all 0.3s;font-size:0.9rem}
.social-links a:hover{background:rgba(23,195,178,0.1);border-color:#17c3b2;color:#17c3b2}
.business-coop{margin-top:40px}
.coop-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-top:15px}
.coop-card{background:rgba(22,27,34,0.8);border:1px solid rgba(245,158,11,0.1);border-radius:12px;padding:20px;text-align:center;transition:all 0.3s}
.coop-card:hover{border-color:#f59e0b;transform:translateY(-3px)}
.coop-card h4{color:#f59e0b;font-size:1rem;margin-bottom:6px}
.coop-card p{color:#8b949e;font-size:0.85rem}

/* --- Footer --- */
footer{background:rgba(13,17,23,0.95);border-top:1px solid rgba(23,195,178,0.15);padding:30px 0;text-align:center;color:#8b949e;font-size:0.9rem}
footer a{color:#17c3b2}

/* --- Animations --- */
@keyframes fadeInUp{from{opacity:0;transform:translateY(40px)}to{opacity:1;transform:translateY(0)}}
@keyframes glowPulse{0%,100%{box-shadow:0 0 10px rgba(23,195,178,0.2)}50%{box-shadow:0 0 30px rgba(23,195,178,0.4)}}
.animate-fadeInUp{animation:fadeInUp 0.8s ease forwards}
.delay-1{animation-delay:0.1s}
.delay-2{animation-delay:0.2s}
.delay-3{animation-delay:0.3s}
.delay-4{animation-delay:0.4s}
.delay-5{animation-delay:0.5s}
.delay-6{animation-delay:0.6s}

/* --- Responsive --- */
@media(max-width:1024px){
  .hero .container{grid-template-columns:1fr;text-align:center}
  .hero-content p{margin:0 auto 30px}
  .hero-stats{justify-content:center}
  .hero-btns{justify-content:center}
  .hero-image{order:-1;max-width:400px;margin:0 auto}
  .features-grid,.services-grid{grid-template-columns:repeat(2,1fr)}
  .download-cards{grid-template-columns:1fr;max-width:400px;margin:0 auto}
  .security-grid{grid-template-columns:repeat(2,1fr)}
  .team-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .coop-cards{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr}
  .about-image{max-width:400px;margin:0 auto}
}

@media(max-width:768px){
  .hero{padding:120px 0 50px}
  .hero-content h1{font-size:2rem}
  .section-title h2{font-size:1.6rem}
  .features-grid,.services-grid{grid-template-columns:1fr}
  .download-cards,.security-grid{grid-template-columns:1fr}
  .team-grid{grid-template-columns:1fr}
  .coop-cards{grid-template-columns:1fr}
  .hero-stats{gap:20px}
  .hero-stats .stat .num{font-size:1.5rem}
  nav ul{position:fixed;top:70px;left:0;right:0;background:rgba(13,17,23,0.98);flex-direction:column;gap:0;padding:20px;display:none;border-bottom:1px solid rgba(23,195,178,0.15)}
  nav ul.open{display:flex}
  nav ul li{padding:12px 0}
  .menu-toggle{display:block}
  .about-hero h1,.services-hero h1,.faq-hero h1,.contact-hero h1{font-size:2rem}
}