:root{--bg:#0a0e1a;--bg2:#111827;--bg-card:rgba(26,31,53,0.85);--bg-hover:rgba(30,41,70,0.95);--blue:#3b82f6;--cyan:#06b6d4;--purple:#a855f7;--gold:#fbbf24;--t1:#f1f5f9;--t2:#94a3b8;--t3:#64748b;--t4:#38bdf8;--bdr:rgba(59,130,246,0.15);--bdr-glow:rgba(59,130,246,0.4);--shadow:0 0 30px rgba(59,130,246,0.15);--shadow-cyan:0 0 30px rgba(6,182,212,0.2);--trans:0.3s cubic-bezier(0.4,0,0.2,1)}
html{scroll-behavior:smooth}
body{font-family:'PingFang SC','Microsoft YaHei',system-ui,sans-serif;background:var(--bg);color:var(--t1);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased;margin:0;padding:0}
/* Background */
.bg-grid{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:0;background-image:linear-gradient(rgba(59,130,246,0.03) 1px,transparent 1px),linear-gradient(90deg,rgba(59,130,246,0.03) 1px,transparent 1px);background-size:60px 60px}
.bg-glow{position:fixed;top:-300px;left:50%;transform:translateX(-50%);width:1000px;height:800px;pointer-events:none;z-index:0;background:radial-gradient(ellipse at center,rgba(59,130,246,0.08) 0%,transparent 70%)}
.bg-glow-b{position:fixed;bottom:-300px;left:50%;transform:translateX(-50%);width:1000px;height:800px;pointer-events:none;z-index:0;background:radial-gradient(ellipse at center,rgba(6,182,212,0.06) 0%,transparent 70%)}
/* Nav */
.navbar{position:fixed;top:0;left:0;width:100%;z-index:1000;padding:16px 0;transition:all var(--trans)}
.navbar.scrolled{background:rgba(10,14,26,0.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--bdr);padding:10px 0;box-shadow:0 4px 30px rgba(0,0,0,0.3)}
.nav-inner{max-width:1280px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700;color:var(--t1);text-decoration:none;transition:color var(--trans)}
.nav-logo:hover{color:var(--blue)}
.nav-logo img{width:32px;height:32px}
.nav-links{display:flex;align-items:center;gap:32px;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--t2);text-decoration:none;font-size:15px;font-weight:500;transition:all var(--trans);position:relative}
.nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:linear-gradient(135deg,var(--cyan),var(--blue));border-radius:2px;transition:width var(--trans)}
.nav-links a:hover{color:var(--t1)}
.nav-links a:hover::after{width:100%}
.nav-cta{padding:10px 28px;background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;border:none;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;transition:all var(--trans);text-decoration:none;display:inline-block;box-shadow:0 0 20px rgba(59,130,246,0.3)}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 0 35px rgba(59,130,246,0.5)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--t1);margin:5px 0;transition:all var(--trans);border-radius:2px}
.nav-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
/* Section */
.section{position:relative;z-index:1;padding:100px 24px}
.container{max-width:1280px;margin:0 auto}
.s-title{font-size:36px;font-weight:700;text-align:center;background:linear-gradient(135deg,#fbbf24,#f59e0b,#d97706);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin:0 0 12px}
.s-sub{text-align:center;color:var(--t2);font-size:16px;max-width:700px;margin:0 auto 48px;line-height:1.8}
/* Hero */
.hero{min-height:100vh;display:flex;align-items:center;padding-top:120px;padding-bottom:80px}
.hero-content{text-align:center;margin-bottom:48px}
.hero-title{font-size:48px;font-weight:800;line-height:1.3;background:linear-gradient(135deg,#fbbf24,#f59e0b,#d97706);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;max-width:800px;margin:0 auto 16px}
.hero-subtitle{color:var(--t2);font-size:17px;max-width:600px;margin:0 auto 32px}
/* Visitor Cards */
.visitor-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;max-width:1100px;margin:0 auto}
.visitor-grid .vc:nth-child(1){grid-column:span 2}
.visitor-grid .vc:nth-child(2){grid-column:span 2}
.vc{background:var(--bg-card);border:1px solid var(--bdr);border-radius:12px;padding:18px 22px;backdrop-filter:blur(10px);transition:all var(--trans)}
.vc:hover{border-color:var(--bdr-glow);box-shadow:var(--shadow);transform:translateY(-2px)}
.vc-label{font-size:13px;color:var(--t3);margin-bottom:6px}
.vc-value{font-size:15px;color:var(--t4);font-weight:600;word-break:break-all}
.detecting{animation:pulse 1.5s ease-in-out infinite;color:var(--t3)}
@keyframes pulse{0%,100%{opacity:0.5}50%{opacity:1}}
/* Feature Cards */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feat-card{background:var(--bg-card);border:1px solid var(--bdr);border-radius:16px;padding:32px 24px;transition:all var(--trans);position:relative;overflow:hidden}
.feat-card::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(59,130,246,0.05),transparent);opacity:0;transition:opacity var(--trans)}
.feat-card:hover{border-color:var(--bdr-glow);box-shadow:var(--shadow);transform:translateY(-6px)}
.feat-card:hover::before{opacity:1}
.feat-icon{width:56px;height:56px;border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;position:relative;background:linear-gradient(135deg,rgba(59,130,246,0.15),rgba(6,182,212,0.1))}
.feat-card h3{font-size:18px;font-weight:600;margin:0 0 10px}
.feat-card p{font-size:14px;color:var(--t2);line-height:1.7;margin:0 0 16px}
.feat-link{color:var(--cyan);font-size:14px;font-weight:500;text-decoration:none;transition:all var(--trans);display:inline-flex;align-items:center;gap:6px}
.feat-link:hover{color:var(--blue);gap:10px}
/* Stats */
.stats-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;background:var(--bg-card);border:1px solid var(--bdr);border-radius:24px;padding:40px 32px;backdrop-filter:blur(10px)}
.stat-item{text-align:center}
.stat-num{font-size:44px;font-weight:800;background:linear-gradient(135deg,#06b6d4,#3b82f6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.2}
.stat-label{font-size:14px;color:var(--t3);margin-top:4px}
/* API */
.api-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.api-card{background:var(--bg-card);border:1px solid var(--bdr);border-radius:16px;padding:28px 20px;text-align:center;transition:all var(--trans);position:relative;overflow:hidden}
.api-card::after{content:'';position:absolute;top:0;left:20%;right:20%;height:2px;background:linear-gradient(135deg,var(--cyan),var(--blue));border-radius:1px;transform:scaleX(0);transition:transform var(--trans)}
.api-card:hover::after{transform:scaleX(1)}
.api-card:hover{border-color:var(--bdr-glow);transform:translateY(-4px)}
.api-card h3{font-size:17px;font-weight:600;margin:0 0 8px}
.api-card p{font-size:14px;color:var(--t2);margin:0}
/* Tech */
.tech-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tech-card{text-align:center;padding:40px 28px;background:var(--bg-card);border:1px solid var(--bdr);border-radius:16px;transition:all var(--trans)}
.tech-card:hover{border-color:var(--bdr-glow);box-shadow:var(--shadow)}
.tech-icon{width:80px;height:80px;margin:0 auto 24px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,rgba(59,130,246,0.1),rgba(6,182,212,0.05));position:relative}
.tech-icon::after{content:'';position:absolute;inset:-4px;border-radius:50%;border:1px solid var(--bdr-glow);animation:ring 2s ease-in-out infinite}
@keyframes ring{0%,100%{transform:scale(1);opacity:0.3}50%{transform:scale(1.08);opacity:0.6}}
.tech-card h3{font-size:20px;font-weight:600;margin:0 0 12px}
.tech-card p{font-size:14px;color:var(--t2);line-height:1.7;margin:0}
/* Integration */
.int-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.int-card{text-align:center;padding:36px 24px;background:var(--bg-card);border:1px solid var(--bdr);border-radius:16px;transition:all var(--trans)}
.int-card:hover{border-color:var(--bdr-glow);transform:translateY(-4px)}
.int-card h3{font-size:18px;font-weight:600;margin:0 0 8px}
.int-card p{font-size:14px;color:var(--t2);line-height:1.7;margin:0}
/* Pricing */
.price-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.price-card{background:var(--bg-card);border:1px solid var(--bdr);border-radius:16px;padding:36px 24px;text-align:center;transition:all var(--trans);position:relative}
.price-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.price-card.featured{border-color:var(--blue);box-shadow:0 0 40px rgba(59,130,246,0.2);background:rgba(26,36,65,0.95);transform:scale(1.03)}
.price-card.featured:hover{transform:scale(1.03) translateY(-4px)}
.price-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;font-size:12px;font-weight:600;padding:4px 16px;border-radius:20px}
.price-name{font-size:18px;font-weight:700;margin-bottom:6px}
.price-orig{font-size:14px;color:var(--t3);text-decoration:line-through;margin-bottom:4px}
.price-num{font-size:36px;font-weight:800;color:var(--t1);margin-bottom:4px}
.price-period{font-size:14px;color:var(--t3);margin-bottom:20px}
.price-feats{list-style:none;text-align:left;margin:0 0 24px;padding:0}
.price-feats li{font-size:14px;color:var(--t2);padding:8px 0;border-bottom:1px solid rgba(255,255,255,0.05);display:flex;align-items:center;gap:8px}
.price-feats li::before{content:'✓';color:var(--cyan);font-weight:700;font-size:13px;flex-shrink:0}
.price-cta{display:block;width:100%;padding:12px 0;border:1px solid var(--blue);border-radius:8px;color:var(--blue);font-size:15px;font-weight:600;text-decoration:none;transition:all var(--trans)}
.price-cta:hover{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;box-shadow:0 0 25px rgba(59,130,246,0.4)}
.price-card.featured .price-cta{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff}
/* Buttons */
.btn-primary{padding:14px 36px;background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:all var(--trans);text-decoration:none;display:inline-block;box-shadow:0 0 25px rgba(59,130,246,0.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 40px rgba(59,130,246,0.5)}
.view-all{display:block;text-align:center;margin-top:28px;color:var(--cyan);font-size:15px;font-weight:500;text-decoration:none;transition:color var(--trans)}
.view-all:hover{color:var(--blue)}
/* Mobile Menu */
.mobile-menu{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(10,14,26,0.97);z-index:999;flex-direction:column;align-items:center;justify-content:center;gap:28px}
.mobile-menu.active{display:flex}
.mobile-menu a{color:var(--t1);font-size:22px;font-weight:600;text-decoration:none;transition:color var(--trans)}
.mobile-menu a:hover{color:var(--cyan)}
.mobile-menu .close-btn{position:absolute;top:24px;right:24px;background:none;border:none;color:var(--t1);font-size:32px;cursor:pointer}
/* Footer */
.footer{background:rgba(10,14,26,0.9);border-top:1px solid var(--bdr);padding:48px 24px 24px}
.ft-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;max-width:1280px;margin:0 auto}
.ft-brand h3{font-size:22px;font-weight:700;margin:0 0 8px}
.ft-brand p{font-size:14px;color:var(--t2);line-height:1.7;margin:0}
.ft-col h4{font-size:16px;font-weight:600;margin:0 0 16px}
.ft-col ul{list-style:none;margin:0;padding:0}
.ft-col li{margin-bottom:10px}
.ft-col a{color:var(--t2);text-decoration:none;font-size:14px;transition:color var(--trans)}
.ft-col a:hover{color:var(--cyan)}
.ft-bottom{max-width:1280px;margin:32px auto 0;padding-top:24px;border-top:1px solid var(--bdr);text-align:center;font-size:13px;color:var(--t3)}
.ft-bottom a{color:var(--t3);text-decoration:none;transition:color var(--trans)}
.ft-bottom a:hover{color:var(--t4)}
/* Trust Bar */
.trust-bar{display:flex;justify-content:center;gap:60px;margin-top:40px;flex-wrap:wrap}
.trust-item{display:flex;align-items:center;gap:8px;color:var(--t3);font-size:13px}
.trust-item svg{width:18px;height:18px;fill:var(--cyan)}
/* Icon Placeholders */
.ic{display:inline-flex;align-items:center;justify-content:center}
.ic-sm{width:24px;height:24px}
.ic-md{width:28px;height:28px}
.ic-lg{width:36px;height:36px}
.ic-xl{width:48px;height:48px}
.c-blue{color:var(--blue)}.c-cyan{color:var(--cyan)}.c-purple{color:var(--purple)}.c-gold{color:var(--gold)}
/* Responsive */
@media(max-width:1024px){
.hero-title{font-size:36px}
.feat-grid{grid-template-columns:repeat(2,1fr)}
.api-grid{grid-template-columns:repeat(2,1fr)}
.price-grid{grid-template-columns:repeat(2,1fr)}
.visitor-grid{grid-template-columns:repeat(2,1fr)}
.visitor-grid .vc:nth-child(1),.visitor-grid .vc:nth-child(2){grid-column:span 1}
.ft-grid{grid-template-columns:repeat(2,1fr)}
.price-card.featured{transform:none}
.price-card.featured:hover{transform:translateY(-6px)}
}
@media(max-width:768px){
.nav-links,.nav-cta{display:none}
.nav-toggle{display:block}
.hero-title{font-size:28px}
.s-title{font-size:28px}
.feat-grid{grid-template-columns:1fr}
.stats-bar{grid-template-columns:repeat(2,1fr)}
.api-grid,.tech-grid,.int-grid,.price-grid{grid-template-columns:1fr}
.visitor-grid{grid-template-columns:1fr}
.visitor-grid .vc:nth-child(1),.visitor-grid .vc:nth-child(2){grid-column:span 1}
.ft-grid{grid-template-columns:1fr}
.section{padding:60px 16px}
.hero{min-height:auto;padding-top:100px}
}