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#ffffff1a;border-radius:24px;width:100%;max-width:400px;padding:32px;animation:.3s cubic-bezier(.4,0,.2,1) ff-slide-up;position:relative;box-shadow:0 25px 50px -12px #00000040}.ff-alert-icon{border-radius:50%;justify-content:center;align-items:center;width:64px;height:64px;margin:0 auto 20px;display:flex}.ff-alert-icon svg{width:32px;height:32px}.ff-alert-modal.error .ff-alert-icon{color:#ef4444;background:#fef2f2}.ff-alert-modal.success .ff-alert-icon{color:#10b981;background:#ecfdf5}.ff-alert-modal.warning .ff-alert-icon{color:#f59e0b;background:#fffbeb}.ff-alert-title{color:#1e293b;letter-spacing:-.025em;margin-bottom:8px;font-size:20px;font-weight:800}.ff-alert-message{color:#64748b;margin-bottom:24px;font-size:14px;line-height:1.6}.ff-alert-btn{color:#fff;cursor:pointer;background:#1e293b;border:none;border-radius:14px;width:100%;padding:14px;font-size:15px;font-weight:700;transition:all .2s}.ff-alert-btn:hover{background:#0f172a;transform:translateY(-1px);box-shadow:0 4px 12px 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var(--ff-border);z-index:1000;background:#fff;flex-direction:column;height:100vh;transition:transform .4s cubic-bezier(.19,1,.22,1);display:flex;position:fixed;top:0;left:0;overflow-y:auto}.sidebar-header{border-bottom:1px solid var(--ff-border);padding:5px 14px}.logo{color:#1e293b;justify-content:flex-start;align-items:center;gap:12px;margin-bottom:6px;font-size:20px;font-weight:800;display:flex}#logo-icon,#mobile-logo-icon{color:var(--ff-primary);align-items:center;display:flex}.pro-tag{background:linear-gradient(135deg, var(--ff-primary), var(--ff-secondary));color:#fff;text-transform:uppercase;letter-spacing:.5px;border-radius:8px;padding:2px 10px;font-size:10px;font-weight:800}.sidebar-header p{color:var(--ff-text-muted);text-transform:uppercase;letter-spacing:.1em;justify-content:flex-start;align-items:center;font-size:11px;font-weight:700;display:flex}.sidebar-nav{flex:1;padding:24px 16px}.sidebar-nav ul{margin:0;padding:0;list-style:none}.sidebar-nav 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0;scroll-margin-top:100px}.help-section:last-child{border-bottom:none}.header-visual{width:64px;height:64px;color:var(--ff-primary);background:linear-gradient(135deg,#6366f11a,#8b5cf61a);border-radius:20px;justify-content:center;align-items:center;margin-bottom:28px;display:flex}h1{letter-spacing:-.04em;color:#0f172a;margin-bottom:20px;font-size:48px;font-weight:800}.lead{color:var(--ff-text-soft);margin-bottom:0;font-size:20px;line-height:1.6}h2{color:#0f172a;letter-spacing:-.02em;align-items:center;gap:16px;margin-bottom:28px;font-size:32px;font-weight:800;display:flex}.sec-icon{color:var(--ff-primary);box-shadow:var(--ff-shadow);background:#fff;border-radius:12px;align-items:center;padding:10px;display:flex}.content-block{margin-bottom:40px}h3{color:#1e293b;margin-bottom:14px;font-size:20px;font-weight:700}p{color:var(--ff-text-soft);margin-bottom:18px;font-size:15px;line-height:1.75}.video-grid{grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:28px;margin-top:32px;display:grid}.video-card{border:1px solid var(--ff-border);box-shadow:var(--ff-shadow);background:#fff;border-radius:20px;transition:all .4s cubic-bezier(.4,0,.2,1);overflow:hidden}.video-card:hover{box-shadow:var(--ff-shadow-lg);border-color:var(--ff-primary);cursor:pointer;transform:translateY(-8px)}.video-thumbnail{background-color:#000;background-position:50%;background-size:cover;height:200px;position:relative}.play-overlay{background:#0003;justify-content:center;align-items:center;transition:background .3s;display:flex;position:absolute;inset:0}.video-card:hover .play-overlay{background:#0000001a}.play-button-icon{background:var(--ff-primary);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:56px;height:56px;font-size:24px;transition:transform .3s;display:flex;box-shadow:0 10px 20px #6366f14d}.video-card:hover .play-button-icon{transform:scale(1.15)}.video-info{padding:20px}.video-info h4{margin-bottom:6px;font-size:16px;font-weight:700}.video-info p{color:var(--ff-text-muted);margin-bottom:16px;font-size:13px}.watch-hint{color:var(--ff-primary);align-items:center;gap:8px;font-size:14px;font-weight:700;display:flex}.grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin-bottom:40px;display:grid}.info-card{border:1px solid var(--ff-border);box-shadow:var(--ff-shadow);background:#fff;border-radius:20px;padding:30px;transition:all .3s}.info-card:hover{border-color:var(--ff-primary);box-shadow:var(--ff-shadow-lg)}.info-card h4{margin-bottom:12px;font-size:18px;font-weight:700}.info-card.premium{border-left:5px solid var(--ff-secondary);background:linear-gradient(90deg,#8b5cf605,#fff)}ul{margin:0 0 32px 24px;list-style-type:none}li{color:var(--ff-text-soft);margin-bottom:12px}.feature-list li{padding-left:24px;position:relative}.feature-list li:before{content:"•";color:var(--ff-primary);font-weight:800;position:absolute;left:0}.faq-item{border:1px solid var(--ff-border);background:#fff;border-radius:16px;margin-bottom:30px;padding:20px}.faq-item strong{color:#0f172a;margin-bottom:10px;font-size:17px;display:block}.mobile-header{box-sizing:border-box;border-bottom:1px solid var(--ff-border);z-index:1100;background:#fff;justify-content:space-between;align-items:center;width:100%;height:64px;margin:0;padding:0 20px;display:none;position:sticky;top:0;left:0;right:0}#mobile-menu-btn{cursor:pointer;color:var(--ff-primary);background:#6366f11a;border:none;border-radius:10px;justify-content:center;align-items:center;width:40px;height:40px;transition:background .2s;display:flex}#mobile-menu-btn:hover{background:#6366f133}.overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:950;background:#0f172a80;display:none;position:fixed;inset:0}.overlay.open{display:block}.mobile-only{display:none}.main-footer{border-top:1px solid var(--ff-border);color:var(--ff-text-muted);text-align:center;padding:60px 0;font-size:14px}#close-sidebar-btn{background:var(--ff-bg-soft);cursor:pointer;width:36px;height:36px;color:var(--ff-text-muted);border:none;border-radius:10px;font-weight:800}@media (width<=1024px){.content{margin-left:var(--ff-sidebar-width);padding:60px 40px}}@media (width<=900px){.mobile-header{display:flex}.help-layout{display:block}.sidebar{width:280px;box-shadow:none;z-index:2000;height:100vh;top:0;transform:translate(-100%)}.sidebar.open{transform:translate(0);box-shadow:20px 0 50px #0003}.content{width:100%;padding:32px 20px;display:block;margin-left:0!important}.mobile-only{display:flex}h1{font-size:32px}h2{font-size:24px}.video-grid{grid-template-columns:1fr}}