:root{--vk-dark:#0A0E27;--vk-light:#F8F9FC;--vk-blue:#3399FF;--vk-pink:#FF66B2;--vk-purple:#9966FF;--vk-green:#33CC66;--vk-text:#1A1A2E;--vk-muted:#6B7280;--surface-0:#F8F9FC;--surface-1:#FFFFFF;--surface-2:#F1F3F8;--surface-3:#E8EBF2;--space-1:0.25rem;--space-2:0.5rem;--space-3:0.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--space-16:4rem;--space-20:5rem;--space-24:6rem;--space-32:8rem;--shadow-sm:0 1px 2px rgba(0,0,0,0.04),0 1px 3px rgba(0,0,0,0.06);--shadow-md:0 4px 6px -1px rgba(0,0,0,0.06),0 2px 4px -2px rgba(0,0,0,0.06);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.06),0 4px 6px -4px rgba(0,0,0,0.06);--shadow-xl:0 20px 25px -5px rgba(0,0,0,0.07),0 8px 10px -6px rgba(0,0,0,0.05);--shadow-2xl:0 25px 50px -12px rgba(0,0,0,0.12);--shadow-glow-pink:0 8px 30px rgba(255,102,178,0.25);--shadow-glow-blue:0 8px 30px rgba(51,153,255,0.25);--shadow-glow-purple:0 8px 30px rgba(153,102,255,0.25);--radius-sm:0.375rem;--radius-md:0.5rem;--radius-lg:0.75rem;--radius-xl:1rem;--radius-2xl:1.25rem;--radius-3xl:1.5rem;--ease-out:cubic-bezier(0.16,1,0.3,1);--ease-spring:cubic-bezier(0.34,1.56,0.64,1);--duration-fast:150ms;--duration-normal:250ms;--duration-slow:400ms;--gradient-brand:linear-gradient(135deg,var(--vk-pink),var(--vk-purple),var(--vk-blue));--gradient-brand-text:linear-gradient(135deg,var(--vk-pink),var(--vk-purple),var(--vk-blue))}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}body{margin:0;padding:0;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:var(--vk-text);line-height:1.6}body.lang-zh{font-family:'Noto Sans SC','Inter',system-ui,sans-serif}body.lang-en{font-family:'Inter','Noto Sans SC',system-ui,sans-serif}body.lang-ru{font-family:'Inter','Noto Sans SC',system-ui,sans-serif}:focus-visible{outline:2px solid var(--vk-blue);outline-offset:2px;border-radius:var(--radius-sm)}@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:0.01ms !important;animation-iteration-count:1 !important;transition-duration:0.01ms !important;scroll-behavior:auto !important}}#navbar{transition:background-color 0.4s var(--ease-out),backdrop-filter 0.4s var(--ease-out),box-shadow 0.4s var(--ease-out)}#navbar.nav-scrolled{background-color:rgba(10,14,39,0.75) !important;backdrop-filter:blur(24px) saturate(180%);-webkit-backdrop-filter:blur(24px) saturate(180%);box-shadow:0 1px 0 rgba(255,255,255,0.06),0 4px 24px rgba(0,0,0,0.25)}#navbar .hidden.md\:flex a{position:relative}.lang-btn{padding:var(--space-1) var(--space-2) var(--space-1) var(--space-3);border-radius:9999px;font-size:12px;font-weight:600;letter-spacing:0.02em;color:rgba(255,255,255,0.6);cursor:pointer;transition:all var(--duration-fast) var(--ease-out);border:1px solid transparent;text-transform:uppercase;line-height:1.5}.lang-btn:hover{color:rgba(255,255,255,0.95);background:rgba(255,255,255,0.08)}.lang-btn.active-lang{color:#fff;background:rgba(255,102,178,0.15);border-color:rgba(255,102,178,0.4);box-shadow:0 0 12px rgba(255,102,178,0.15)}.hamburger span{display:block;width:22px;height:2px;background:rgba(255,255,255,0.9);transition:all 0.35s var(--ease-out);border-radius:2px;transform-origin:center}.hamburger:hover span{background:#fff}.hamburger.is-active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}.hamburger.is-active span:nth-child(2){opacity:0;transform:scaleX(0)}.hamburger.is-active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}#mobile-menu{transition:opacity 0.3s var(--ease-out),transform 0.3s var(--ease-out)}#mobile-menu:not(.hidden){opacity:1}#mobile-menu a{position:relative;transition:color var(--duration-fast) var(--ease-out),padding-left var(--duration-fast) var(--ease-out);padding-left:var(--space-1)}#mobile-menu a:hover{color:#fff;padding-left:var(--space-4)}#hero{position:relative;overflow:hidden}#hero-canvas{position:absolute;top:0;left:0;width:100%;height:100%;z-index:1}.hero-content{position:relative;z-index:2}.hero-bg-gradient{position:absolute;top:0;left:0;width:100%;height:100%;background:radial-gradient(ellipse 80% 60% at 20% 80%,rgba(153,102,255,0.18) 0%,transparent 70%),radial-gradient(ellipse 60% 50% at 80% 20%,rgba(51,153,255,0.15) 0%,transparent 70%),radial-gradient(ellipse 40% 40% at 50% 50%,rgba(255,102,178,0.10) 0%,transparent 70%),radial-gradient(ellipse 120% 60% at 50% 110%,rgba(51,204,102,0.06) 0%,transparent 50%),linear-gradient(180deg,#0A0E27 0%,#0d1233 50%,#0f1540 100%);z-index:0}.hero-subtitle-divider{display:inline-block;width:40px;height:2px;background:var(--gradient-brand);border-radius:1px;vertical-align:middle;margin:0 var(--space-3)}.cta-primary{background:var(--gradient-brand);color:#fff;padding:14px 36px;border-radius:var(--radius-xl);font-weight:600;font-size:15px;letter-spacing:0.01em;border:none;cursor:pointer;transition:transform var(--duration-fast) var(--ease-out),box-shadow var(--duration-normal) var(--ease-out),filter var(--duration-fast);text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);position:relative;overflow:hidden}.cta-primary::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(255,255,255,0.15),transparent);opacity:0;transition:opacity var(--duration-fast)}.cta-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-glow-purple),var(--shadow-xl)}.cta-primary:hover::after{opacity:1}.cta-primary:active{transform:translateY(0) scale(0.98);box-shadow:var(--shadow-md)}.cta-outline{background:transparent;color:rgba(255,255,255,0.9);padding:14px 36px;border-radius:var(--radius-xl);font-weight:600;font-size:15px;letter-spacing:0.01em;border:1.5px solid rgba(255,255,255,0.25);cursor:pointer;transition:all var(--duration-normal) var(--ease-out);text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2)}.cta-outline:hover{border-color:rgba(255,255,255,0.6);background:rgba(255,255,255,0.08);transform:translateY(-2px);box-shadow:0 4px 20px rgba(0,0,0,0.2)}.cta-outline:active{transform:translateY(0) scale(0.98)}.scroll-indicator{animation:scrollBounce 2s ease-in-out infinite;opacity:0.5;transition:opacity var(--duration-normal)}.scroll-indicator:hover{opacity:0.8}@keyframes scrollBounce{0%,100%{transform:translateY(0)}50%{transform:translateY(8px)}}.section-title{position:relative;display:inline-block}.section-title-line{display:block;width:48px;height:3px;background:var(--gradient-brand);border-radius:2px;margin:var(--space-4) auto 0}.product-card{--tilt-max-angle:5;--tilt-perspective:800px;--tilt-transition:0.4s;--card-hover-lift:-8px;--card-breathe-scale:1.015;--gradient-flow-speed:8s;--gradient-flow-speed-slow:20s;background:var(--surface-1);border-radius:var(--radius-2xl);padding:var(--space-8);border:1.5px solid transparent;background-clip:padding-box;position:relative;overflow:hidden;opacity:0;transform:translateY(40px) scale(0.95);transition:opacity 0.7s var(--ease-out),transform 0.7s var(--ease-spring),box-shadow 0.35s var(--ease-out),border-color 0.35s var(--ease-out);will-change:transform,opacity}.product-card.animate-in{opacity:1;transform:translateY(0) scale(1);transition:opacity 0.01ms,transform var(--tilt-transition) var(--ease-out),box-shadow 0.35s var(--ease-out),border-color 0.35s var(--ease-out)}.product-card:nth-child(1){transition-delay:0s,0s,0s,0s}.product-card:nth-child(2){transition-delay:0.08s,0.08s,0s,0s}.product-card:nth-child(3){transition-delay:0.16s,0.16s,0s,0s}.product-card:nth-child(4){transition-delay:0.24s,0.24s,0s,0s}.product-card:nth-child(5){transition-delay:0.32s,0.32s,0s,0s}.product-card.animate-in:nth-child(1),.product-card.animate-in:nth-child(2),.product-card.animate-in:nth-child(3),.product-card.animate-in:nth-child(4),.product-card.animate-in:nth-child(5){transition-delay:0s}.product-card-border{position:absolute;inset:-1.5px;border-radius:inherit;background:linear-gradient(135deg,var(--card-color-from),var(--card-color-to));opacity:0;z-index:-1;transition:opacity 0.35s var(--ease-out)}.product-card:hover .product-card-border{opacity:1}.product-card-spotlight{position:absolute;top:0;left:0;right:0;bottom:0;border-radius:inherit;background:radial-gradient(600px circle at var(--mouse-x,50%) var(--mouse-y,50%),rgba(153,102,255,0.04),transparent 40%);opacity:0;transition:opacity 0.35s;pointer-events:none;z-index:1}.product-card:hover .product-card-spotlight{opacity:1}.product-card-header{position:relative;height:4px;width:100%;margin-bottom:var(--space-6);border-radius:4px;background:linear-gradient(90deg,#ffffff,#ffffff);background-size:200% 100%;opacity:0.3;transition:all 0.35s var(--ease-out);animation:gradientFlowSlow var(--gradient-flow-speed-slow) linear infinite;transform-origin:left center}.product-card:hover .product-card-header{animation:gradientFlow var(--gradient-flow-speed) linear infinite;opacity:1;height:8px;background:linear-gradient(90deg,#ffffff,var(--card-color-to),var(--card-color-from),#ffffff);background-size:200% 100%}@keyframes gradientFlow{0%{background-position:0% 50%}100%{background-position:200% 50%}}@keyframes gradientFlowSlow{0%{background-position:0% 50%}100%{background-position:200% 50%}}.product-card:hover{box-shadow:var(--shadow-xl),0 8px 32px rgba(0,0,0,0.08);border-color:transparent}.product-card-title{transition:color 0.35s var(--ease-out)}.product-card:hover .product-card-title{color:#1A1A2E;font-weight:700}.product-card-desc{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;transition:-webkit-line-clamp 0.3s}.product-card:hover .product-card-desc{-webkit-line-clamp:unset}.product-card-footer-line{position:absolute;bottom:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--card-color-from),var(--card-color-to));border-radius:0 0 var(--radius-2xl) var(--radius-2xl);transition:width 0.5s var(--ease-out);z-index:2}.product-card:hover .product-card-footer-line{width:100%}.product-icon{width:52px;height:52px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:var(--space-5);transition:transform var(--duration-normal) var(--ease-spring)}.product-card:hover .product-icon{transform:scale(1.1) translateY(-2px)}@media (prefers-reduced-motion:reduce){.product-card{opacity:1;transform:none;transition:box-shadow 0.15s var(--ease-out),border-color 0.15s var(--ease-out)}.product-card-header{animation:none}.product-card-footer-line{transition:none}.product-card-title{transition:none}}.advantage-item{display:flex;gap:var(--space-6);align-items:flex-start}.advantage-num{font-size:52px;font-weight:800;line-height:1;background:var(--gradient-brand-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;flex-shrink:0;width:80px;opacity:0.7;transition:opacity var(--duration-normal) var(--ease-out)}.advantage-item:hover .advantage-num{opacity:1}.advantage-visual{width:100%;height:200px;border-radius:var(--radius-xl);overflow:hidden;position:relative;border:1px solid var(--surface-3);transition:box-shadow var(--duration-normal) var(--ease-out)}.advantage-visual:hover{box-shadow:var(--shadow-lg)}.result-card{text-align:center;padding:var(--space-10) 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var(--duration-fast) var(--ease-out),box-shadow var(--duration-fast) var(--ease-out),background var(--duration-fast);background:rgba(255,255,255,0.04);outline:none;font-family:inherit;color:#fff}.form-input::placeholder{color:rgba(255,255,255,0.35)}.form-input:hover{border-color:rgba(255,255,255,0.2);background:rgba(255,255,255,0.06)}.form-input:focus{border-color:var(--vk-blue);box-shadow:0 0 0 3px rgba(51,153,255,0.15);background:rgba(255,255,255,0.08)}.form-submit{width:100%;padding:15px;background:var(--gradient-brand);color:#fff;border:none;border-radius:var(--radius-lg);font-size:15px;font-weight:600;letter-spacing:0.01em;cursor:pointer;transition:transform var(--duration-fast) var(--ease-out),box-shadow var(--duration-normal) var(--ease-out),filter var(--duration-fast);position:relative;overflow:hidden}.form-submit:hover{transform:translateY(-2px);box-shadow:var(--shadow-glow-purple),var(--shadow-xl)}.form-submit:active{transform:translateY(0) scale(0.98);box-shadow:var(--shadow-md)}.partner-card{padding:var(--space-6);border-radius:var(--radius-xl);background:rgba(255,255,255,0.04);border:1px solid rgba(255,255,255,0.08);transition:all var(--duration-normal) var(--ease-out)}.partner-card:hover{background:rgba(255,255,255,0.08);border-color:rgba(255,102,178,0.25);transform:translateX(4px)}.animate-on-scroll{opacity:0;transform:translateY(30px);transition:opacity 0.8s var(--ease-out),transform 0.8s var(--ease-out)}.animate-on-scroll.animate-in{opacity:1;transform:translateY(0)}.delay-1{transition-delay:0.08s}.delay-2{transition-delay:0.16s}.delay-3{transition-delay:0.24s}.delay-4{transition-delay:0.32s}.delay-5{transition-delay:0.40s}.footer-link{color:rgba(255,255,255,0.5);text-decoration:none;transition:color var(--duration-fast) var(--ease-out),padding-left var(--duration-fast) var(--ease-out);font-size:14px;padding-left:0}.footer-link:hover{color:#fff;padding-left:var(--space-1)}.geo-pattern{position:absolute;opacity:0.06;pointer-events:none}.about-visual{width:100%;border-radius:var(--radius-2xl);overflow:hidden;box-shadow:var(--shadow-2xl);transition:transform var(--duration-slow) var(--ease-out)}.about-visual:hover{transform:scale(1.01)}.about-svg{display:block;width:100%;height:auto}.about-iot-img{display:block;width:100%;height:auto;border-radius:var(--radius-2xl)}.hero-bg-image{position:absolute;top:0;left:0;width:100%;height:100%;background-image:url('../images/hero-v2.jpg');background-size:cover;background-position:center;opacity:0.3;z-index:0}.product-card-image-wrap{width:100%;height:200px;border-radius:var(--radius-lg);overflow:hidden;margin-bottom:var(--space-5);background:var(--surface-2)}.product-card-image{width:100%;height:100%;object-fit:cover;display:block;transition:transform var(--duration-slow) var(--ease-out)}.product-card:hover 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saturate(180%);border-bottom:1px solid transparent;border-image:linear-gradient(90deg,var(--vk-blue),var(--vk-purple)) 1;box-shadow:none}.nav-link{position:relative}.nav-link::after{content:'';position:absolute;bottom:2px;left:50%;width:0;height:2px;background:var(--gradient-brand);border-radius:1px;transition:width 0.3s cubic-bezier(0.16,1,0.3,1),left 0.3s cubic-bezier(0.16,1,0.3,1)}.nav-link:hover::after{width:60%;left:20%}#ai-demo{position:relative;z-index:1}.ai-chat-container{max-width:640px;margin:0 auto;background:rgba(10,14,39,0.9);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-radius:var(--radius-2xl);border:1px solid rgba(255,255,255,0.1);overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,0.3),0 0 40px rgba(51,153,255,0.05)}.ai-chat-header{padding:16px 20px;border-bottom:1px solid 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rgba(51,204,102,0)}}.ai-chat-messages{padding:20px;height:320px;overflow-y:auto;scroll-behavior:smooth}.ai-chat-messages::-webkit-scrollbar{width:4px}.ai-chat-messages::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.15);border-radius:2px}.ai-msg{margin-bottom:16px;display:flex;gap:10px;opacity:0;transform:translateY(10px);animation:msgFadeIn 0.4s ease forwards}@keyframes msgFadeIn{to{opacity:1;transform:translateY(0)}}.ai-msg-bot{flex-direction:row}.ai-msg-user{flex-direction:row-reverse}.ai-msg-bubble{max-width:80%;padding:10px 14px;border-radius:16px;font-size:14px;line-height:1.6;word-break:break-word}.ai-msg-bot .ai-msg-bubble{background:rgba(255,255,255,0.08);color:rgba(255,255,255,0.9);border-bottom-left-radius:4px}.ai-msg-user 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ease-out;opacity:0;will-change:left,top,opacity}#mouse-glow.active{opacity:1}.product-card::after{content:'';position:absolute;top:0;left:0;right:0;bottom:0;border-radius:inherit;background:radial-gradient( 300px circle at var(--glow-x,50%) var(--glow-y,50%),rgba(255,255,255,0.12) 0%,rgba(255,255,255,0.03) 30%,transparent 60% );opacity:0;transition:opacity 0.3s ease;pointer-events:none;z-index:3}.product-card:hover::after{opacity:1}@media (hover:none){#mouse-glow{display:none}.product-card::after{display:none}}#scroll-progress-bar{position:fixed;top:0;left:0;height:3px;width:0%;background:linear-gradient(90deg,var(--vk-blue),var(--vk-purple));z-index:100;transition:opacity 0.3s ease;will-change:width;border-radius:0 2px 2px 0}#navbar.nav-scrolled ~ #scroll-progress-bar,#scroll-progress-bar.nav-transparent{opacity:0.4}[data-section]{opacity:0;transform:translateY(30px);transition:opacity 0.8s cubic-bezier(0.16,1,0.3,1),transform 0.8s cubic-bezier(0.16,1,0.3,1)}[data-section].section-visible{opacity:1;transform:translateY(0)}#hero[data-section],[data-section]#hero{opacity:1;transform:none}#cursor-glow-dot{position:fixed;width:8px;height:8px;background:radial-gradient(circle,rgba(153,102,255,0.9),rgba(255,102,178,0.6));border-radius:50%;pointer-events:none;z-index:10000;transform:translate(-50%,-50%);transition:width 0.2s,height 0.2s,background 0.2s;mix-blend-mode:screen;filter:blur(0.5px)}#cursor-glow-dot.cursor-hover{width:16px;height:16px;background:radial-gradient(circle,rgba(255,102,178,0.95),rgba(153,102,255,0.7));filter:blur(1px)}#cursor-glow-trail{position:fixed;width:40px;height:40px;background:radial-gradient(circle,rgba(153,102,255,0.15),transparent 70%);border-radius:50%;pointer-events:none;z-index:9999;transform:translate(-50%,-50%);transition:width 0.3s,height 0.3s;mix-blend-mode:screen}#cursor-glow-trail.cursor-hover{width:60px;height:60px;background:radial-gradient(circle,rgba(255,102,178,0.2),transparent 70%)}.cursor-particle{position:fixed;width:4px;height:4px;background:rgba(153,102,255,0.7);border-radius:50%;pointer-events:none;z-index:9998;transform:translate(-50%,-50%);mix-blend-mode:screen}#loading-screen{position:fixed;top:0;left:0;right:0;bottom:0;z-index:99999;background:#0A0E27;display:flex;align-items:center;justify-content:center;transition:opacity 0.5s}#loading-screen.fade-out{opacity:0 !important;pointer-events:none}.product-card-link{display:inline-flex;align-items:center;gap:4px;margin-top:12px;font-size:13px;font-weight:500;color:var(--card-color-from,#3399FF);transition:all 0.2s ease;text-decoration:none}.product-card-link:hover{gap:8px;opacity:0.8}.product-card-link svg{transition:transform 0.2s ease}.product-card-link:hover svg{transform:translateX(2px)}