:root{--primary:#4a6fa5;--secondary:#166d67;--accent:#ff6b35;--light:#f8f9fa;--dark:#2d3436;--gray-dark:#495057;--gradient:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);--gradient-accent:linear-gradient(135deg,var(--accent) 0%,#ff8e50 100%);--shadow:0 5px 15px rgba(0,0,0,0.1);--transition:all .3s ease}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;line-height:1.6;color:#333;background-color:#f4f4f4;overflow-x:hidden}.logo-img{height:40px;width:auto;margin-right:10px;vertical-align:middle}.logo{display:flex;align-items:center;font-size:1rem;font-weight:700;color:var(--primary)}a{text-decoration:none;color:inherit}ul{list-style:none}img{max-width:100%;height:auto}.container{width:90%;max-width:1200px;margin:0 auto;padding:0 15px}.btn{display:inline-block;padding:12px 28px;border-radius:50px;text-decoration:none;font-weight:600;transition:var(--transition);border:none;cursor:pointer;text-align:center}.btn-primary{background:var(--gradient);color:#fff;box-shadow:var(--shadow)}.btn-primary:hover{transform:translateY(-3px);box-shadow:0 10px 20px rgba(0,0,0,0.15)}.btn-secondary{background:var(--gradient-accent);color:#fff;box-shadow:var(--shadow)}.btn-secondary:hover{transform:translateY(-3px);box-shadow:0 10px 20px rgba(0,0,0,0.15)}.btn-small{padding:8px 20px;font-size:.9rem}.section-title{font-size:2.5rem;text-align:center;margin-bottom:3rem;color:var(--dark);position:relative}.section-title:after{content:'';display:block;width:80px;height:4px;background:var(--gradient);margin:15px auto;border-radius:2px}.header{background-color:#fff;box-shadow:var(--shadow);position:fixed;width:100%;top:0;z-index:1000}.nav-container{display:flex;justify-content:space-between;align-items:center;padding:1rem 0}.logo{font-size:1.8rem;font-weight:700;color:var(--primary);display:flex;align-items:center}.logo-icon{margin-right:8px;font-size:1.5rem}.nav-menu{display:flex}.nav-item{margin-left:2rem;position:relative}.nav-link{color:var(--dark);font-weight:500;transition:var(--transition);padding:.5rem 0}.nav-link:hover{color:var(--primary)}.nav-link:after{content:'';position:absolute;width:0;height:2px;bottom:0;left:0;background:var(--gradient);transition:var(--transition)}.nav-link:hover:after{width:100%}.hamburger{display:none;flex-direction:column;cursor:pointer}.hamburger span{width:25px;height:3px;background-color:var(--dark);margin:3px 0;transition:var(--transition);border-radius:3px}.hero{background:linear-gradient(rgba(74,111,165,0.8),rgba(22,109,103,0.8));background-size:cover;background-position:center;padding-top:80px;height:auto;min-height:50vh;display:flex;align-items:center;color:#fff;text-align:center}.hero-content{max-width:800px;margin:0 auto;padding:2rem;padding-top:20px}.hero-title{font-size:2.5rem;margin-bottom:1.5rem;line-height:1.2;padding:0 10px}.hero-subtitle{font-size:1.1rem;margin-bottom:2.5rem;opacity:.9;padding:0 10px}.hero-buttons{display:flex;justify-content:center;gap:1rem}.features{padding:4rem 0;background-color:#fff}.features h2{text-align:center;margin-bottom:3rem;font-size:2.5rem;color:var(--dark)}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}.feature-card{text-align:center;padding:2rem;border-radius:10px;box-shadow:var(--shadow);transition:var(--transition)}.feature-card:hover{transform:translateY(-10px)}.feature-icon{font-size:3rem;margin-bottom:1rem}.feature-card h3{margin-bottom:1rem;color:var(--dark)}.popular-chatrooms{padding:4rem 0;background-color:var(--light)}.popular-chatrooms h2{text-align:center;margin-bottom:3rem;font-size:2.5rem;color:var(--dark)}.chatrooms-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}.chatroom-card{background-color:#fff;padding:2rem;border-radius:10px;box-shadow:var(--shadow);text-align:center}.chatroom-card h3{margin-bottom:1rem;color:var(--primary)}.chatroom-card p{margin-bottom:1.5rem}.blog-preview{padding:4rem 0;background-color:#fff}.blog-preview h2{text-align:center;margin-bottom:3rem;font-size:2.5rem;color:var(--dark)}.blog-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;margin-bottom:3rem}.blog-card{background-color:var(--light);padding:1.5rem;border-radius:10px;box-shadow:var(--shadow)}.blog-card h3{margin-bottom:.5rem;color:var(--primary)}.blog-meta{font-size:.9rem;color:var(--gray-dark);margin-bottom:1rem;font-weight:500}.text-center{text-align:center}footer{background-color:var(--dark);color:#fff;padding:3rem 0 1rem}.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-bottom:2rem}.footer-section h3,.footer-section h4{margin-bottom:1rem;color:#fff}.footer-section ul{list-style:none}.footer-section ul li{margin-bottom:.5rem}.footer-section a{color:#ddd;text-decoration:none;transition:var(--transition)}.footer-section a:hover{color:#fff}.social-icons{display:flex;gap:1rem}.social-icons a{display:inline-block;width:40px;height:40px;background-color:rgba(255,255,255,0.1);border-radius:50%;text-align:center;line-height:40px;transition:var(--transition);font-size:1.2rem}.social-icons a:hover{background-color:var(--primary)}.footer-bottom{text-align:center;padding-top:2rem;border-top:1px solid rgba(255,255,255,0.1)}.seo-content{padding:3rem 0}.content-block{margin-bottom:2.5rem;padding:1.5rem;background:var(--light);border-radius:10px;box-shadow:var(--shadow)}.content-block h2{color:var(--primary);margin-bottom:1rem;font-size:1.8rem}.content-block p{line-height:1.7;color:var(--dark)}@media (max-width:768px){.hamburger{display:flex}.nav-menu{position:fixed;left:-100%;top:70px;flex-direction:column;background-color:#fff;width:100%;text-align:center;transition:var(--transition);box-shadow:0 10px 27px rgba(0,0,0,0.05);padding:2rem 0}.nav-menu.active{left:0}.nav-item{margin:1.5rem 0}.hero{padding-top:90px;min-height:60vh}.hero-title{font-size:1.8rem;margin-top:10px;padding:0 15px}.hero-subtitle{font-size:1rem;padding:0 15px}.hero-buttons{flex-direction:column;align-items:center}.btn{margin-bottom:1rem;width:200px;text-align:center}.features-grid,.chatrooms-grid,.blog-grid{grid-template-columns:1fr}.logo-img{height:35px}.logo{font-size:1.4rem}.content-block h2{font-size:1.6rem}}@media (max-width:576px){.hero{min-height:60vh}.hero-title{font-size:1.6rem}.features h2,.popular-chatrooms h2,.blog-preview h2{font-size:2rem}.footer-content{grid-template-columns:1fr}.logo-img{height:30px}.logo{font-size:1.2rem}.content-block{padding:1rem}.content-block h2{font-size:1.4rem}}@media (max-width:400px){.logo span{display:none}.logo-img{margin-right:0}.hero-title{font-size:1.4rem;line-height:1.3}.content-block h2{font-size:1.3rem}}:where(h1) { margin-block: 0.67em; font-size: 2em; }