/* === CSS Reset & Base === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;overflow-x:hidden}
a{color:var(--primary);text-decoration:none;transition:color 0.2s ease}
a:hover{color:#fff}
img{max-width:100%;height:auto;display:block}

/* === Variables === */
:root{--bg:#0a0e27;--surface:#12163a;--surface2:#1a1f4a;--primary:#f0c040;--primary-soft:#d4a830;--text:#e8eaf0;--text2:#b0b8d0;--border:#2a2f5a;--radius:12px;--shadow:0 8px 32px rgba(0,0,0,0.6);--transition:0.2s ease;--gradient-bg:linear-gradient(135deg, #0a0e27 0%, #141a3a 50%, #0f1330 100%);--gradient-hero:linear-gradient(135deg, #0a0e27 0%, #141a3a 50%, #0f1330 100%);--glass-bg:rgba(10,14,39,0.92);--glass-blur:blur(12px);--card-hover:translateY(-4px);--counter-duration:1500ms}

/* === Container === */
.container{max-width:1200px;margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 16px}}

/* === Header === */
header{position:fixed;top:0;left:0;right:0;z-index:100;background:var(--glass-bg);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border-bottom:1px solid var(--border);transition:background var(--transition),border-color var(--transition)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;padding:0 24px;max-width:1200px;margin:0 auto}
@media(max-width:768px){.header-inner{padding:0 16px}}
.logo{display:flex;align-items:center;gap:10px;font-size:24px;font-weight:700;color:var(--primary);letter-spacing:1px}
.logo svg{flex-shrink:0}
.nav{display:flex;align-items:center;gap:32px;list-style:none}
@media(max-width:900px){.nav{display:none}}
.nav a{color:var(--text2);font-size:15px;font-weight:500;transition:color var(--transition);position:relative}
.nav a:hover,.nav a.active{color:var(--primary)}
.nav a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--primary);transition:width var(--transition)}
.nav a:hover::after,.nav a.active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:12px}
.theme-toggle,.menu-toggle{background:none;border:1px solid var(--border);color:var(--text2);width:40px;height:40px;border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:18px;transition:all var(--transition)}
.theme-toggle:hover,.menu-toggle:hover{background:var(--surface2);color:var(--primary)}
.menu-toggle{display:none}
@media(max-width:900px){.menu-toggle{display:flex}}
.mobile-menu{display:none;position:fixed;top:72px;left:0;right:0;background:var(--surface);border-bottom:1px solid var(--border);padding:16px 24px;z-index:99;box-shadow:var(--shadow)}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:12px 0;color:var(--text2);font-size:16px;border-bottom:1px solid var(--border)}
.mobile-menu a:last-child{border-bottom:none}
.mobile-menu a:hover{color:var(--primary)}

/* === Hero === */
.hero{min-height:90vh;display:flex;align-items:center;position:relative;padding:120px 0 80px;background:var(--gradient-hero);overflow:hidden}
.hero::before{content:'';position:absolute;top:-30%;right:-10%;width:600px;height:600px;background:radial-gradient(circle, rgba(240,192,64,0.08) 0%, transparent 70%);pointer-events:none}
.hero-content{position:relative;z-index:2;max-width:680px}
.hero h1{font-size:52px;font-weight:800;line-height:1.2;margin-bottom:20px;background:linear-gradient(135deg,var(--primary) 0%,#f5d060 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
@media(max-width:768px){.hero h1{font-size:36px}}
.hero p{font-size:18px;color:var(--text2);margin-bottom:32px;max-width:560px}
.hero-buttons{display:flex;flex-wrap:wrap;gap:16px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 32px;border-radius:8px;font-size:16px;font-weight:600;border:none;cursor:pointer;transition:all var(--transition)}
.btn-primary{background:var(--primary);color:#0a0e27}
.btn-primary:hover{background:var(--primary-soft);transform:translateY(-2px);box-shadow:0 8px 24px rgba(240,192,64,0.3)}
.btn-secondary{background:var(--surface2);color:var(--text);border:1px solid var(--border)}
.btn-secondary:hover{background:var(--border);color:var(--primary);transform:translateY(-2px)}
.hero-stats{display:flex;flex-wrap:wrap;gap:40px;margin-top:48px;padding-top:32px;border-top:1px solid var(--border)}
.hero-stat span{font-size:28px;font-weight:700;color:var(--primary);display:block}
.hero-stat small{color:var(--text2);font-size:14px}

/* === Section Common === */
section{padding:80px 0}
@media(max-width:768px){section{padding:56px 0}}
.section-label{display:inline-block;font-size:13px;font-weight:600;color:var(--primary);text-transform:uppercase;letter-spacing:2px;margin-bottom:12px}
.section-title{font-size:36px;font-weight:700;margin-bottom:16px;line-height:1.3}
@media(max-width:768px){.section-title{font-size:28px}}
.section-desc{color:var(--text2);font-size:17px;max-width:680px;margin-bottom:40px}

/* === About === */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
@media(max-width:900px){.about-grid{grid-template-columns:1fr}}
.about-text h3{font-size:24px;margin-bottom:16px;color:var(--primary)}
.about-text p{margin-bottom:16px;color:var(--text2)}
.about-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px}
.about-card{background:var(--surface);padding:20px;border-radius:var(--radius);border:1px solid var(--border);transition:all var(--transition)}
.about-card:hover{transform:var(--card-hover);box-shadow:var(--shadow)}
.about-card h4{font-size:18px;margin-bottom:6px;color:var(--primary)}
.about-card p{font-size:14px;color:var(--text2);margin:0}

/* === Products === */
.products-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.product-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:all var(--transition)}
.product-card:hover{border-color:var(--primary);transform:var(--card-hover);box-shadow:var(--shadow)}
.product-card .icon{font-size:36px;margin-bottom:12px;display:block}
.product-card h3{font-size:20px;margin-bottom:8px}
.product-card p{color:var(--text2);font-size:14px;margin-bottom:12px}
.product-card .tag{display:inline-block;background:rgba(240,192,64,0.15);color:var(--primary);font-size:12px;padding:4px 10px;border-radius:4px;font-weight:500}

/* === Features === */
.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.feature-item{background:var(--surface);padding:28px;border-radius:var(--radius);border:1px solid var(--border);text-align:center;transition:all var(--transition)}
.feature-item:hover{transform:var(--card-hover);box-shadow:var(--shadow);border-color:var(--primary)}
.feature-item .icon{font-size:40px;margin-bottom:12px;display:block}
.feature-item h4{font-size:18px;margin-bottom:8px}
.feature-item p{color:var(--text2);font-size:14px;margin:0}

/* === Testimonials === */
.testimonials-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.testimonial-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:all var(--transition)}
.testimonial-card:hover{transform:var(--card-hover);box-shadow:var(--shadow)}
.testimonial-card .stars{color:var(--primary);font-size:16px;margin-bottom:8px}
.testimonial-card blockquote{color:var(--text2);font-style:italic;margin-bottom:16px;font-size:15px}
.testimonial-card .author{font-weight:600;color:var(--text)}
.testimonial-card .role{font-size:13px;color:var(--text2)}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;background:var(--surface);transition:all var(--transition)}
.faq-item:hover{border-color:var(--primary)}
.faq-question{width:100%;padding:18px 24px;background:none;border:none;color:var(--text);font-size:16px;font-weight:500;text-align:left;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background var(--transition)}
.faq-question:hover{background:var(--surface2)}
.faq-question .arrow{transition:transform 0.3s;font-size:14px;color:var(--primary)}
.faq-item.active .faq-question .arrow{transform:rotate(180deg)}
.faq-answer{padding:0 24px 18px;color:var(--text2);font-size:15px;display:none}
.faq-item.active .faq-answer{display:block;animation:fadeIn 0.3s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}

/* === HowTo === */
.howto-steps{max-width:800px;margin:0 auto;counter-reset:step}
.howto-step{display:flex;gap:20px;margin-bottom:24px;align-items:flex-start;opacity:0;transform:translateY(20px);animation:stepIn 0.5s ease forwards}
.howto-step:nth-child(1){animation-delay:0.1s}
.howto-step:nth-child(2){animation-delay:0.2s}
.howto-step:nth-child(3){animation-delay:0.3s}
.howto-step:nth-child(4){animation-delay:0.4s}
.howto-step:nth-child(5){animation-delay:0.5s}
@keyframes stepIn{to{opacity:1;transform:translateY(0)}}
.howto-step .step-number{flex-shrink:0;width:40px;height:40px;border-radius:50%;background:var(--primary);color:#0a0e27;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;transition:all var(--transition)}
.howto-step:hover .step-number{transform:scale(1.1);box-shadow:0 0 20px rgba(240,192,64,0.4)}
.howto-step .step-content h4{font-size:18px;margin-bottom:4px}
.howto-step .step-content p{color:var(--text2);font-size:15px}

/* === Knowledge Hub === */
.articles-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.article-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:all var(--transition)}
.article-card:hover{border-color:var(--primary);transform:var(--card-hover);box-shadow:var(--shadow)}
.article-card .tag{display:inline-block;background:rgba(240,192,64,0.12);color:var(--primary);font-size:12px;padding:4px 10px;border-radius:4px;margin-bottom:10px}
.article-card h4{font-size:18px;margin-bottom:8px}
.article-card p{color:var(--text2);font-size:14px;margin-bottom:12px}
.article-card .read-more{font-weight:500;font-size:14px;color:var(--primary);transition:color var(--transition)}
.article-card .read-more:hover{color:#fff}

/* === Contact === */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
@media(max-width:900px){.contact-grid{grid-template-columns:1fr}}
.contact-info h3{font-size:24px;margin-bottom:16px}
.contact-info p{color:var(--text2);margin-bottom:8px}
.contact-info .contact-item{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.contact-info .contact-item .icon{font-size:20px;color:var(--primary)}
.contact-form input,.contact-form textarea{width:100%;padding:14px 16px;background:var(--surface);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:15px;margin-bottom:16px;transition:border var(--transition),box-shadow var(--transition)}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(240,192,64,0.15)}
.contact-form textarea{min-height:120px;resize:vertical}
.contact-form button{width:100%}

/* === Footer === */
footer{background:var(--surface);border-top:1px solid var(--border);padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:500px){.footer-grid{grid-template-columns:1fr}}
.footer-brand .logo{margin-bottom:12px}
.footer-brand p{color:var(--text2);font-size:14px;max-width:300px}
.footer-col h5{font-size:16px;margin-bottom:16px;color:var(--primary)}
.footer-col a{display:block;color:var(--text2);font-size:14px;margin-bottom:8px;transition:color var(--transition)}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:24px;border-top:1px solid var(--border);font-size:13px;color:var(--text2);flex-wrap:wrap;gap:12px}
.footer-bottom a{color:var(--text2);margin-left:16px}
.footer-bottom a:hover{color:var(--primary)}

/* === Back to Top === */
.back-to-top{position:fixed;bottom:32px;right:32px;width:48px;height:48px;border-radius:50%;background:var(--primary);color:#0a0e27;border:none;font-size:22px;cursor:pointer;display:none;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(240,192,64,0.3);transition:all var(--transition);z-index:50}
.back-to-top.visible{display:flex;animation:bounceIn 0.3s ease}
@keyframes bounceIn{0%{opacity:0;transform:scale(0.5)}50%{transform:scale(1.1)}100%{opacity:1;transform:scale(1)}}
.back-to-top:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(240,192,64,0.4)}

/* === Scroll Spy === */
.scroll-spy{position:fixed;right:16px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:8px;z-index:40}
@media(max-width:768px){.scroll-spy{display:none}}
.scroll-spy a{width:10px;height:10px;border-radius:50%;background:var(--border);transition:all var(--transition);display:block}
.scroll-spy a.active{background:var(--primary);transform:scale(1.4);box-shadow:0 0 8px rgba(240,192,64,0.5)}

/* === Dark Mode === */
body.light{--bg:#f4f6fc;--surface:#ffffff;--surface2:#e8ecf4;--text:#1a1e2e;--text2:#4a5070;--border:#d0d6e8;--gradient-hero:linear-gradient(135deg, #f4f6fc 0%, #e8ecf4 50%, #f0f2f8 100%);--glass-bg:rgba(244,246,252,0.92)}
body.light .btn-primary{color:#fff}
body.light .hero h1{background:linear-gradient(135deg,#1a1e2e 0%,#3a4060 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
body.light .faq-question:hover{background:var(--surface2)}
body.light .product-card,.light .feature-item,.light .testimonial-card,.light .about-card,.light .article-card{background:var(--surface);border-color:var(--border)}
body.light .contact-form input,.light .contact-form textarea{background:var(--surface);border-color:var(--border);color:var(--text)}
body.light .scroll-spy a{background:var(--border)}
body.light .scroll-spy a.active{background:var(--primary)}

/* === Counter Animation === */
.counter-value{display:inline-block}

/* === Responsive === */
@media(max-width:600px){.hero-stats{gap:24px}.hero-stat span{font-size:22px}.hero-buttons .btn{width:100%;justify-content:center}.about-cards{grid-template-columns:1fr}.section-title{font-size:24px}.hero h1{font-size:28px}}

/* === Scroll Animations === */
@media(prefers-reduced-motion:no-preference){.about-card,.product-card,.feature-item,.testimonial-card,.article-card{opacity:0;transform:translateY(30px);animation:cardReveal 0.6s ease forwards}@keyframes cardReveal{to{opacity:1;transform:translateY(0)}}.about-card:nth-child(1){animation-delay:0.1s}.about-card:nth-child(2){animation-delay:0.2s}.about-card:nth-child(3){animation-delay:0.3s}.about-card:nth-child(4){animation-delay:0.4s}.product-card:nth-child(1){animation-delay:0.05s}.product-card:nth-child(2){animation-delay:0.1s}.product-card:nth-child(3){animation-delay:0.15s}.product-card:nth-child(4){animation-delay:0.2s}.product-card:nth-child(5){animation-delay:0.25s}.product-card:nth-child(6){animation-delay:0.3s}.feature-item:nth-child(1){animation-delay:0.05s}.feature-item:nth-child(2){animation-delay:0.1s}.feature-item:nth-child(3){animation-delay:0.15s}.feature-item:nth-child(4){animation-delay:0.2s}.feature-item:nth-child(5){animation-delay:0.25s}.feature-item:nth-child(6){animation-delay:0.3s}.testimonial-card:nth-child(1){animation-delay:0.1s}.testimonial-card:nth-child(2){animation-delay:0.2s}.testimonial-card:nth-child(3){animation-delay:0.3s}.article-card:nth-child(1){animation-delay:0.05s}.article-card:nth-child(2){animation-delay:0.1s}.article-card:nth-child(3){animation-delay:0.15s}.article-card:nth-child(4){animation-delay:0.2s}.article-card:nth-child(5){animation-delay:0.25s}.article-card:nth-child(6){animation-delay:0.3s}.article-card:nth-child(7){animation-delay:0.35s}.article-card:nth-child(8){animation-delay:0.4s}}