:root{--primary-bg:#fff;--header-bg:#000;--text-primary:#fff;--text-secondary:#e7ecf3;--text-muted:#b2bdcd;--text-dark:#000;--accent:#0072ff;--border:#1f2940;--font-family:Source Han Sans CN,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}*{box-sizing:border-box;margin:0;padding:0}#app,body,html{height:100%;width:100%;font-family:var(--font-family);scroll-behavior:smooth}html{scrollbar-width:none;-ms-overflow-style:none}html::-webkit-scrollbar{display:none}body{background:var(--primary-bg);color:var(--text-primary);overflow-x:hidden}a,h3,p{cursor:pointer}.website-container{display:flex;flex-direction:column;min-height:100vh}.site-header{position:fixed;top:0;left:0;width:100%;height:60px;padding:0 20px 0 120px;background:var(--header-bg);z-index:1000}.brand-logo,.site-header{display:flex;align-items:center}.brand-logo{gap:8px;font-weight:700}.brand-logo span{font-weight:700;font-size:20px}.main-navigation{display:flex;gap:40px;padding-left:200px;align-items:center}.nav-item{font-size:16px;color:var(--text-primary);text-decoration:none;transition:color .2s ease;position:relative}.nav-item:hover{color:var(--accent)}.nav-item:after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--accent);transition:width .2s ease}.nav-item:hover:after{width:100%}.support-btn{background:linear-gradient(135deg,#0072ff,#00d4ff);color:#fff;border:none;padding:10px 20px;border-radius:25px;font-size:14px;font-weight:600;cursor:pointer;margin-left:auto;margin-right:16px;transition:all .4s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 15px rgba(0,114,255,.4),0 0 20px rgba(0,114,255,.2);position:relative;overflow:hidden;text-transform:uppercase;letter-spacing:.5px}.support-btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,hsla(0,0%,100%,.3),transparent);transition:left .6s ease}.support-btn:hover:before{left:100%}.support-btn:hover{background:linear-gradient(135deg,#0056cc,#09f);transform:translateY(-2px) scale(1.05);box-shadow:0 8px 25px rgba(0,114,255,.6),0 0 30px rgba(0,114,255,.4)}.mobile-menu-btn{display:none;background:transparent;color:var(--text-primary);border:0;font-size:22px;cursor:pointer;margin-left:auto;padding:8px;border-radius:4px;transition:background-color .2s ease}.mobile-menu-btn:hover{background-color:hsla(0,0%,100%,.1)}.mobile-navigation{position:fixed;top:60px;left:0;right:0;display:none;flex-direction:column;gap:10px;padding:10px 16px 16px;border-top:1px solid var(--border);background:rgba(11,15,26,.95);backdrop-filter:blur(10px);z-index:999}.mobile-nav-item{color:var(--text-secondary);text-decoration:none;padding:8px 0}.main-content{margin-top:60px}.hero-banner{background:url(/img/banner.bb4f558c.webp) 50%/cover no-repeat;background-size:100% 100%;height:1350px;width:100%;margin-top:-60px;padding:350px 0 72px;border-bottom:1px solid var(--border)}.hero-text-container{max-width:1400px;margin:0 auto;padding:0 16px;text-align:center}.hero-title{margin:0 0 12px;font-size:clamp(22px,4.2vw + 12px,54px);line-height:1.2;font-weight:400;color:var(--text-primary)}.hero-description{font-size:clamp(12px,1.2vw + 8px,27px)}.tutorial-section{margin-top:-800px;text-align:center}.section-title{font-size:28px;color:var(--text-primary);margin-bottom:40px;letter-spacing:.5px}.tutorial-grid{max-width:1400px;margin:0 auto;padding:0 16px;display:grid;grid-template-columns:repeat(auto-fit,minmax(400px,1fr));gap:20px}.tutorial-card{padding:40px 0 20px 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