/* Yanshi page */
:root{--bg-deep:#000;--primary:#FFB800;--primary-light:#FFD54F;--primary-dark:#E6A000;--text-main:#fff;--text-dim:#9E9E9E;--glass-bg:rgba(40,30,0,0.35);--glass-border:rgba(255,184,0,0.2);--accent-warm:#FF8F00;--warning-bg:rgba(255,152,0,0.1);--warning-border:rgba(255,152,0,0.3);--warning-text:#ffc107}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC",sans-serif;background:var(--bg-deep);color:var(--text-main);overflow-x:hidden;line-height:1.6}
#particles-canvas{position:fixed;top:0;left:0;width:100%;height:100%;z-index:-1}
.navbar{position:fixed;top:0;left:0;width:100%;height:80px;background:rgba(0,0,0,0.8);backdrop-filter:blur(20px);border-bottom:1px solid var(--glass-border);display:flex;justify-content:space-between;align-items:center;padding:0 5%;z-index:1000;transition:all .3s}
.nav-logo{display:flex;align-items:center;text-decoration:none}
.nav-logo img{height:42px;width:auto;display:block}
.nav-menu{display:flex;gap:40px}
.nav-menu a{color:var(--text-dim);text-decoration:none;font-size:.95em;transition:all .3s;position:relative}
.nav-menu a::after{content:"";position:absolute;bottom:-5px;left:0;width:0;height:2px;background:var(--primary);transition:width .3s}
.nav-menu a:hover{color:var(--primary)}
.nav-menu a:hover::after{width:100%}
.nav-menu a.active{color:var(--primary)}
.nav-menu a.active::after{width:100%}
.nav-cta{padding:12px 30px;background:linear-gradient(135deg,var(--primary),var(--accent-warm));border:none;border-radius:30px;color:#1a1a1a;font-weight:700;cursor:pointer;transition:all .3s}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(255,184,0,.4)}
.page-header{padding:140px 5% 60px;text-align:center;position:relative}
.page-title{font-size:clamp(2em,4vw,3.5em);font-weight:800;margin-bottom:20px;color:#fff}
.page-subtitle{font-size:1.1em;color:var(--text-dim);max-width:700px;margin:0 auto;line-height:1.8}
.demo-container{max-width:900px;margin:0 auto 100px;padding:0 5%;display:grid;grid-template-columns:repeat(auto-fit,minmax(380px,1fr));gap:40px}
.demo-card{background:var(--glass-bg);backdrop-filter:blur(20px);border:1px solid var(--glass-border);border-radius:20px;padding:40px;transition:all .4s;display:flex;flex-direction:column;position:relative;overflow:hidden}
.demo-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,transparent,var(--primary),transparent);opacity:0;transition:opacity .3s}
.demo-card:hover{transform:translateY(-5px);border-color:var(--primary);box-shadow:0 10px 40px rgba(255,184,0,0.12)}
.demo-card:hover::before{opacity:1}
.demo-header{display:flex;align-items:center;gap:15px;margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid rgba(255,255,255,0.05)}
.demo-icon{width:50px;height:50px;background:rgba(255,184,0,0.1);border:1px solid var(--primary);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.5em;color:var(--primary-light)}
.demo-title{font-size:1.4em;font-weight:700;color:#fff}
.info-row{margin-bottom:15px;display:flex;flex-direction:column;gap:8px}
.info-label{font-size:.9em;color:var(--text-dim)}
.info-value{background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.1);padding:12px 15px;border-radius:8px;font-family:"Courier New",Courier,monospace;color:var(--primary-light);font-size:1.05em;display:flex;justify-content:space-between;align-items:center}
.copy-btn{background:none;border:none;color:var(--text-dim);cursor:pointer;font-size:.9em;transition:color .3s}
.copy-btn:hover{color:#fff}
.alert-box{background:var(--warning-bg);border:1px solid var(--warning-border);color:var(--warning-text);padding:12px 15px;border-radius:8px;font-size:.9em;margin-top:10px;display:flex;align-items:flex-start;gap:10px}
.qr-container{text-align:center;margin-top:10px}
.qr-box{width:200px;height:200px;margin:0 auto 15px;background:#fff;border:2px solid var(--primary);border-radius:15px;padding:10px;position:relative;overflow:hidden}
.qr-scan-line{position:absolute;top:0;left:0;width:100%;height:2px;background:var(--primary);box-shadow:0 0 10px var(--primary);animation:scan 2s infinite linear}
@keyframes scan{0%{top:0;opacity:0}10%{opacity:1}90%{opacity:1}100%{top:100%;opacity:0}}
.qr-placeholder{width:100%;height:100%;background:repeating-linear-gradient(45deg,#f0f0f0,#f0f0f0 10px,#e0e0e0 10px,#e0e0e0 20px);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#333;font-weight:bold;font-size:.8em;text-align:center}
.qr-tip{color:var(--primary-light);font-weight:600;display:flex;align-items:center;justify-content:center;gap:8px}
.btn-action{margin-top:auto;padding-top:25px}
.btn-link{display:block;width:100%;text-align:center;padding:15px 0;background:linear-gradient(135deg,var(--primary),var(--accent-warm));border-radius:10px;color:#1a1a1a;text-decoration:none;font-weight:700;transition:all .3s}
.btn-link:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(255,184,0,.3)}
.cta-section{text-align:center;padding:80px 5%;background:rgba(255,184,0,0.04);border-top:1px solid var(--glass-border)}
.cta-section h2{font-size:clamp(1.5em,3vw,2em);margin-bottom:20px}
.btn-primary-large{padding:15px 40px;background:linear-gradient(135deg,var(--primary),var(--accent-warm));border:none;border-radius:50px;color:#1a1a1a;font-size:1.1em;font-weight:700;cursor:pointer;transition:all .3s;display:inline-flex;align-items:center;gap:10px}
.btn-primary-large:hover{transform:translateY(-2px);box-shadow:0 10px 20px rgba(255,184,0,.3)}
.footer{text-align:center;padding:30px 5%;background:var(--bg-deep);border-top:1px solid var(--glass-border);color:var(--text-dim);font-size:.9em;position:relative;z-index:10}
.footer a{color:var(--text-dim);text-decoration:none;transition:color .3s}
.footer a:hover{color:var(--primary-light)}
.footer p{margin-bottom:5px}
.mobile-menu-btn{display:none;font-size:1.8em;color:var(--primary);cursor:pointer;user-select:none}
@media(max-width:768px){
  .mobile-menu-btn{display:block}
  .nav-menu{display:flex;flex-direction:column;position:absolute;top:80px;left:0;width:100%;background:rgba(0,0,0,0.95);backdrop-filter:blur(20px);padding:20px 0;gap:25px;text-align:center;border-bottom:1px solid var(--glass-border);opacity:0;transform:translateY(-20px);pointer-events:none;transition:all .3s}
  .nav-menu.active{opacity:1;transform:translateY(0);pointer-events:auto}
  .page-title{font-size:2.2em}
  .demo-container{grid-template-columns:1fr}
}