:root{--color-primary: #1a2a4d;--color-primary-dark: #0f1a30;--color-secondary: #2eb72e;--color-secondary-dark: #259625;--color-menu-hover: #2eb72e;--color-icon: #2eb72e;--color-white: #ffffff;--color-background: #ffffff;--color-light-gray: #f5f5f5;--color-gray: #e0e0e0;--color-text-secondary: #666666;--color-text-tertiary: #cccccc;--color-text: #333333;--color-red: #e74c3c;--color-orange: #f39c12;--color-blue: #3498db;--font-primary: "Roboto", sans-serif;--font-size-base: 16px;--font-size-sm: 14px;--font-size-lg: 18px;--font-size-xl: 24px;--font-size-2xl: 32px;--font-size-3xl: 40px;--spacing-xs: .5rem;--spacing-sm: 1rem;--spacing-md: 1.5rem;--spacing-lg: 2rem;--spacing-xl: 3rem;--spacing-2xl: 4rem;--container-max-width: 1200px;--header-height: 80px;--nav-height: 50px;--transition-fast: .2s ease;--transition-normal: .3s ease;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .1);--shadow-md: 0 4px 8px rgba(0, 0, 0, .15);--shadow-lg: 0 8px 16px rgba(0, 0, 0, .2);--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:var(--font-size-base);scroll-behavior:smooth}body{font-family:var(--font-primary);color:var(--color-text);line-height:1.6;background-color:var(--color-background)}img{max-width:100%;height:auto;display:block}a{text-decoration:none;color:inherit;transition:color var(--transition-fast)}a:hover{text-decoration:none}ul,ol{list-style:none}button{cursor:pointer;border:none;background:none;font-family:inherit}.container{width:100%;max-width:var(--container-max-width);margin:0 auto;padding:0 var(--spacing-sm)}.topbar{background-color:var(--color-primary-dark);padding:var(--spacing-xs) 0;border-bottom:1px solid rgba(255,255,255,.1)}.topbar-content{display:flex;justify-content:space-between;align-items:center;font-size:var(--font-size-sm)}.topbar-left{display:flex;align-items:center;gap:var(--spacing-md);color:var(--color-text-tertiary)}.topbar-item{display:flex;align-items:center;gap:var(--spacing-xs)}.topbar-item i{color:var(--color-icon)}.topbar-right{display:flex;align-items:center;gap:var(--spacing-md)}.topbar-right .topbar-item{color:#fffc}.topbar-hotline{display:flex;align-items:center;gap:var(--spacing-xs);color:var(--color-white);font-weight:600;background-color:var(--color-secondary);padding:4px 12px;border-radius:var(--radius-sm);transition:all var(--transition-fast)}.topbar-hotline:hover{background-color:var(--color-secondary-dark);color:var(--color-white)}.topbar-hotline i{color:var(--color-white);animation:pulse-ring 1.5s ease infinite}.topbar-hotline i{animation:pulse-ring-green 1.5s ease infinite}.lang-switcher{position:relative;margin-left:var(--spacing-sm)}.lang-current{display:flex;align-items:center;gap:6px;padding:4px 10px;background-color:#ffffff1a;border:1px solid rgba(255,255,255,.2);border-radius:var(--radius-sm);color:var(--color-white);font-size:12px;font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.lang-current:hover{background-color:#fff3;border-color:#fff6}.lang-flag{width:20px;height:14px;object-fit:cover;border-radius:2px}.lang-code{font-weight:600}.lang-arrow{font-size:10px;transition:transform var(--transition-fast)}.lang-switcher.open .lang-arrow{transform:rotate(180deg)}.lang-dropdown{position:absolute;top:calc(100% + 8px);right:0;min-width:150px;background-color:var(--color-white);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(-10px);transition:all var(--transition-normal);z-index:1100;overflow:hidden;list-style:none;margin:0;padding:0}.lang-switcher.open .lang-dropdown{opacity:1;visibility:visible;transform:translateY(0)}.lang-dropdown li{margin:0;padding:0}.lang-option{display:flex;align-items:center;gap:8px;padding:10px 14px;color:var(--color-text);font-size:13px;transition:all var(--transition-fast);border-bottom:1px solid var(--color-gray)}.lang-dropdown li:last-child .lang-option{border-bottom:none}.lang-option:hover{background-color:var(--color-light-gray);color:var(--color-primary)}.lang-option.active{background-color:#2eb72e1a;color:var(--color-secondary)}.lang-option .lang-flag{width:22px;height:16px}.lang-check{margin-left:auto;font-size:12px;color:var(--color-secondary)}.sticky-header-wrapper{transition:box-shadow var(--transition-normal);background-color:var(--color-white)}@media (min-width: 769px){.sticky-header-wrapper{position:sticky;top:0;z-index:1000}.sticky-header-wrapper.scrolled{box-shadow:0 2px 20px #00000026}}.header{background-color:var(--color-white);padding:10px 0;box-shadow:var(--shadow-sm)}.header-content{display:flex;justify-content:space-between;align-items:center}.logo{display:flex;align-items:center;gap:var(--spacing-sm);position:relative;z-index:10;cursor:pointer}.logo img{height:auto;width:auto;max-width:180px;object-fit:contain}.logo-text{font-size:var(--font-size-xl);font-weight:700;color:var(--color-primary)}.logo-text span{color:var(--color-secondary)}.header-info{display:flex;gap:var(--spacing-lg)}.info-box{display:flex;align-items:center;gap:8px;padding:8px 12px;background-color:var(--color-light-gray);border-radius:var(--radius-md);transition:transform var(--transition-fast)}.info-box:hover{transform:translateY(-2px)}.info-box-icon{width:35px;height:35px;display:flex;align-items:center;justify-content:center;background-color:var(--color-icon);border-radius:50%;color:var(--color-white);font-size:1rem}.info-box-content h4{font-size:var(--font-size-sm);font-weight:600;color:var(--color-primary);margin-bottom:2px}.info-box-content p{font-size:12px;color:var(--color-text-secondary)}.navbar{background-color:var(--color-primary)}.navbar-content{display:flex;align-items:center;gap:var(--spacing-md)}.nav-menu{display:flex;align-items:center;flex:1;justify-content:center;gap:var(--spacing-xs);margin:0;padding:0;list-style:none}.nav-search{display:none}.nav-item{position:relative}.nav-link{display:block;padding:12px var(--spacing-sm);color:var(--color-white);font-weight:500;font-size:13px;text-transform:uppercase;letter-spacing:.3px;white-space:nowrap;transition:background-color var(--transition-fast),color var(--transition-fast)}.nav-link:hover,.nav-link.active{background-color:var(--color-menu-hover);color:var(--color-white)}.nav-dropdown{position:absolute;top:100%;left:0;min-width:220px;background-color:var(--color-white);box-shadow:var(--shadow-md);border-radius:0 0 var(--radius-sm) var(--radius-sm);opacity:0;visibility:hidden;transform:translateY(10px);transition:all var(--transition-normal)}.nav-item:hover .nav-dropdown{opacity:1;visibility:visible;transform:translateY(0)}.nav-dropdown-link{display:block;padding:10px 16px;color:var(--color-text);font-size:var(--font-size-sm);border-bottom:1px solid var(--color-gray);transition:all var(--transition-fast)}.nav-dropdown-link:hover{background-color:var(--color-menu-hover);color:var(--color-white);padding-left:20px}.nav-toggle{display:none;flex-direction:column;gap:5px;padding:var(--spacing-sm)}.nav-toggle span{display:block;width:25px;height:3px;background-color:var(--color-white);border-radius:2px;transition:transform var(--transition-fast)}.navbar-logo{display:none}.navbar-logo img{width:auto;max-width:150px;object-fit:contain}.nav-search-desktop{display:flex;align-items:center;flex-shrink:0}.nav-search-desktop-input{padding:8px 12px;border:none;border-radius:var(--radius-sm) 0 0 var(--radius-sm);font-size:var(--font-size-sm);width:160px;outline:none}.nav-search-desktop-input:focus{box-shadow:0 0 0 2px var(--color-secondary)}.nav-search-desktop-btn{padding:8px 12px;background-color:var(--color-secondary);color:var(--color-white);border:none;border-radius:0 var(--radius-sm) var(--radius-sm) 0;cursor:pointer;transition:background-color var(--transition-fast)}.nav-search-desktop-btn:hover{background-color:var(--color-secondary-dark)}.hero{position:relative;height:500px;overflow:hidden}.hero-slide{position:absolute;top:0;left:0;width:100%;height:100%;opacity:0;transition:opacity .8s ease}.hero-slide.active{opacity:1}.hero-slide img{width:100%;height:100%;object-fit:cover}.hero-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(to right,#1a2a4dcc,#1a2a4d4d)}.hero-content{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:var(--color-white);width:90%;max-width:800px;z-index:30}.hero-title{font-size:var(--font-size-3xl);font-weight:700;margin-bottom:var(--spacing-md);text-shadow:2px 2px 4px rgba(0,0,0,.5)}.hero-subtitle{font-size:var(--font-size-lg);margin-bottom:var(--spacing-lg);opacity:.95;text-shadow:1px 1px 3px rgba(0,0,0,.4)}.hero-btn{display:inline-block;padding:var(--spacing-sm) var(--spacing-lg);background-color:var(--color-secondary);color:var(--color-white);font-weight:600;border-radius:var(--radius-md);transition:all var(--transition-fast)}.hero-btn:hover{background-color:var(--color-secondary-dark);transform:translateY(-2px);box-shadow:var(--shadow-md)}.hero-dots{position:absolute;bottom:20px;left:50%;transform:translate(-50%);display:flex;gap:var(--spacing-sm)}.hero-dot{width:12px;height:12px;border-radius:50%;background-color:#ffffff80;cursor:pointer;transition:all var(--transition-fast)}.hero-dot.active{background-color:var(--color-secondary);transform:scale(1.2)}.section{padding:var(--spacing-2xl) 0}.section-header{text-align:center;margin-bottom:var(--spacing-xl)}.section-title{font-size:var(--font-size-2xl);font-weight:700;color:var(--color-primary);margin-bottom:var(--spacing-sm);position:relative;display:inline-block}.section-title:after{content:"";position:absolute;bottom:-10px;left:50%;transform:translate(-50%);width:60px;height:3px;background:linear-gradient(to right,var(--color-secondary),var(--color-primary));border-radius:2px}.section-subtitle{font-size:var(--font-size-base);color:var(--color-text-secondary);max-width:600px;margin:var(--spacing-md) auto 0}.section-bg-gray{background-color:var(--color-light-gray)}.about{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-xl);align-items:center}.about-video{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg)}.about-video img{width:100%;height:auto}.about-play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:70px;height:70px;background-color:var(--color-secondary);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--color-white);font-size:1.5rem;transition:all var(--transition-fast);cursor:pointer}.about-play-btn:hover{transform:translate(-50%,-50%) scale(1.1);background-color:var(--color-secondary-dark)}.about-content h3{font-size:var(--font-size-xl);color:var(--color-secondary);margin-bottom:var(--spacing-sm)}.about-content h2{font-size:var(--font-size-2xl);color:var(--color-primary);margin-bottom:var(--spacing-md)}.about-content p{color:var(--color-text-secondary);margin-bottom:var(--spacing-md);line-height:1.8}.about-features{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--spacing-md);margin-top:var(--spacing-lg)}.about-feature{text-align:center;padding:var(--spacing-md);background-color:var(--color-light-gray);border-radius:var(--radius-md)}.about-feature-icon{font-size:2rem;color:var(--color-icon);margin-bottom:var(--spacing-sm)}.about-feature h4{font-size:var(--font-size-sm);color:var(--color-primary);font-weight:600}.services-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--spacing-lg)}.service-card{display:flex;flex-direction:column;height:100%;background-color:var(--color-white);border-radius:var(--radius-lg);padding:var(--spacing-lg);text-align:center;box-shadow:var(--shadow-sm);transition:all var(--transition-normal);border:1px solid var(--color-gray)}.service-card:hover{transform:translateY(-10px);box-shadow:var(--shadow-lg);border-color:var(--color-secondary)}.service-icon{width:80px;height:80px;margin:0 auto var(--spacing-md);display:flex;align-items:center;justify-content:center;background-color:var(--color-icon);border-radius:50%;color:var(--color-white);font-size:2rem;flex-shrink:0}.service-image{width:100%;height:120px;margin-bottom:var(--spacing-md);border-radius:var(--radius-md);overflow:hidden;flex-shrink:0}.service-image img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-normal)}.service-card:hover .service-image img{transform:scale(1.05)}.service-card h3{font-size:var(--font-size-lg);color:var(--color-primary);margin-bottom:var(--spacing-sm);font-weight:600;flex-shrink:0}.service-card p{flex:1;font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-bottom:var(--spacing-md);line-height:1.6}.service-link{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-xs);color:var(--color-secondary);font-weight:600;font-size:var(--font-size-sm);transition:gap var(--transition-fast);margin-top:auto}.service-link:hover{gap:var(--spacing-sm);color:var(--color-menu-hover)!important}.projects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--spacing-lg)}.project-card{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);transition:transform var(--transition-normal)}.project-card:hover{transform:translateY(-5px)}.project-card img{width:100%;height:250px;object-fit:cover;transition:transform var(--transition-normal)}.project-card:hover img{transform:scale(1.05)}.project-overlay{position:absolute;bottom:0;left:0;right:0;padding:var(--spacing-md);background:linear-gradient(to top,rgba(26,42,77,.9),transparent);color:var(--color-white)}.project-overlay h4{font-size:var(--font-size-lg);margin-bottom:var(--spacing-xs)}.project-overlay p{font-size:var(--font-size-sm);opacity:.9}.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--spacing-lg)}.news-card-link{display:flex;text-decoration:none;color:inherit;height:100%}.news-card-link:hover{text-decoration:none;color:inherit}.news-card{display:flex;flex-direction:column;width:100%;height:100%;background-color:var(--color-white);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);transition:all var(--transition-normal)}.news-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}.news-image{position:relative;height:200px;flex-shrink:0;overflow:hidden}.news-image img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-normal)}.news-card:hover .news-image img{transform:scale(1.05)}.news-category{position:absolute;top:var(--spacing-sm);left:var(--spacing-sm);padding:var(--spacing-xs) var(--spacing-sm);background-color:var(--color-secondary);color:var(--color-white);font-size:12px;font-weight:600;border-radius:var(--radius-sm)}.news-content{flex:1;display:flex;flex-direction:column;padding:var(--spacing-md)}.news-date{display:flex;align-items:center;gap:var(--spacing-xs);font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-bottom:var(--spacing-sm)}.news-card h3{font-size:var(--font-size-lg);color:var(--color-primary);margin-bottom:var(--spacing-sm);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.news-card h3:hover{color:var(--color-secondary)}.news-excerpt{font-size:var(--font-size-sm);color:var(--color-text-secondary);line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.footer{background-color:var(--color-primary-dark);color:var(--color-white);padding:var(--spacing-2xl) 0 var(--spacing-lg)}.footer li>a:hover{color:var(--color-menu-hover)!important}.footer-content{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--spacing-xl);margin-bottom:var(--spacing-xl)}.footer-col h4{font-size:var(--font-size-lg);margin-bottom:var(--spacing-md);padding-bottom:var(--spacing-sm);border-bottom:2px solid var(--color-secondary);display:inline-block}.footer-col p{margin-bottom:var(--spacing-sm);color:var(--color-text-tertiary);font-size:var(--font-size-sm)}.footer-contact-item{display:flex;align-items:flex-start;gap:var(--spacing-sm);margin-bottom:var(--spacing-sm)}.footer-contact-item i{color:var(--color-icon);margin-top:4px}.footer-links li{margin-bottom:var(--spacing-sm)}.footer-links a{color:var(--color-text-tertiary);font-size:var(--font-size-sm);transition:all var(--transition-fast);display:flex;align-items:center;gap:var(--spacing-xs)}.footer .footer-links a:hover{color:var(--color-menu-hover)!important;padding-left:var(--spacing-sm)}.footer-map{width:100%;height:200px;border-radius:var(--radius-md);overflow:hidden}.footer-map iframe{width:100%;height:100%;border:none}.footer-bottom{text-align:center;padding-top:var(--spacing-lg);border-top:1px solid rgba(255,255,255,.1)}.footer-bottom p{color:var(--color-text-tertiary);font-size:var(--font-size-sm)}.floating-buttons{position:fixed;right:20px;bottom:20px;display:flex;flex-direction:column;gap:var(--spacing-sm);z-index:999;transition:bottom .3s ease}.floating-buttons.pushed-up{bottom:80px}.floating-btn{width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--color-white);font-size:1.3rem;box-shadow:var(--shadow-md);transition:all var(--transition-fast);position:relative}.floating-btn:hover{transform:scale(1.1);color:var(--color-white)}.floating-btn.phone{background-color:var(--color-secondary);animation:pulse-ring-green 2s infinite}.floating-btn.zalo{background-color:#0068ff;animation:pulse-ring-blue 2s infinite}.floating-btn.map{background-color:var(--color-red);animation:pulse-ring-red 2s infinite}@keyframes pulse-ring-green{0%{box-shadow:0 0 #2eb72eb3}70%{box-shadow:0 0 0 15px #2eb72e00}to{box-shadow:0 0 #2eb72e00}}@keyframes pulse-ring-blue{0%{box-shadow:0 0 #0068ffb3}70%{box-shadow:0 0 0 15px #0068ff00}to{box-shadow:0 0 #0068ff00}}@keyframes pulse-ring-red{0%{box-shadow:0 0 #ef4444b3}70%{box-shadow:0 0 0 15px #ef444400}to{box-shadow:0 0 #ef444400}}.back-to-top{position:fixed;right:20px;bottom:20px;width:50px;height:50px;background-color:var(--color-secondary-dark);color:var(--color-white);border:2px solid var(--color-secondary-dark);border-radius:50%;display:none;align-items:center;justify-content:center;font-size:1.2rem;box-shadow:var(--shadow-md);cursor:pointer;transition:all var(--transition-fast);z-index:9999;text-decoration:none}.back-to-top.visible{display:flex}.back-to-top:hover{background-color:var(--color-secondary-dark);border-color:var(--color-secondary-dark);color:var(--color-white);transform:translateY(-3px);box-shadow:var(--shadow-lg)}.nav-overlay{display:none}.scroll-reveal{opacity:0;transition:opacity .6s ease,transform .6s ease}.scroll-reveal.fade-up{transform:translateY(40px)}.scroll-reveal.fade-down{transform:translateY(-40px)}.scroll-reveal.fade-left{transform:translate(-40px)}.scroll-reveal.fade-right{transform:translate(40px)}.scroll-reveal.zoom-in{transform:scale(.9)}.scroll-reveal.is-visible{opacity:1;transform:translateY(0) translate(0) scale(1)}.scroll-reveal.delay-1{transition-delay:.1s}.scroll-reveal.delay-2{transition-delay:.2s}.scroll-reveal.delay-3{transition-delay:.3s}.scroll-reveal.delay-4{transition-delay:.4s}.scroll-reveal.delay-5{transition-delay:.5s}@media (prefers-reduced-motion: reduce){.scroll-reveal{opacity:1;transform:none;transition:none}}@media (max-width: 1024px){.header-info{gap:var(--spacing-sm)}.info-box{padding:var(--spacing-xs) var(--spacing-sm)}.services-grid,.projects-grid,.news-grid{grid-template-columns:repeat(2,1fr)}.footer-content{grid-template-columns:1fr 1fr}}@media (max-width: 768px){:root{--font-size-3xl: 28px;--font-size-2xl: 24px;--font-size-xl: 20px}.topbar-content{display:flex;justify-content:space-between;align-items:center;gap:var(--spacing-md)}.topbar-left{display:flex;flex:1;min-width:0;max-width:calc(100% - 80px)}.topbar-left .topbar-item,.topbar-left .topbar-item span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar-right{display:flex;align-items:center;gap:var(--spacing-sm);flex-shrink:0}.topbar-right .topbar-item,.topbar-right .topbar-hotline{display:none}.lang-switcher{margin-left:0;flex-shrink:0}.lang-switcher.open .lang-dropdown{z-index:9999;right:0;left:auto}.topbar-item:not(:first-child){display:none}.header{display:none}.header-content{flex-direction:column;gap:var(--spacing-md)}.header-info{display:none}.nav-toggle{display:flex;flex-direction:column;gap:5px;padding:8px;position:relative;z-index:2;background:transparent;border:none;cursor:pointer}.nav-toggle span{background-color:var(--color-primary);width:22px;height:2px;border-radius:1px}.navbar-logo{display:block;position:absolute;left:50%;transform:translate(-50%)}.navbar{position:relative;z-index:1000;transition:box-shadow .3s ease;background-color:#fff;padding-left:5px!important;padding-right:0!important}.navbar.mobile-scrolled{position:fixed;top:0;left:0;right:0;box-shadow:0 2px 10px #00000026;animation:slideDownNavbar .3s ease forwards}@keyframes slideDownNavbar{0%{transform:translateY(-100%);opacity:0}to{transform:translateY(0);opacity:1}}body.mobile-scrolled{padding-top:56px}.navbar-content{justify-content:flex-start;padding:var(--spacing-xs) 0;position:relative}.nav-search-desktop{display:none}.nav-menu{position:fixed;top:0;left:-100%;width:300px;height:100vh;background-color:var(--color-white);flex-direction:column;align-items:stretch;justify-content:flex-start;padding-top:0;transition:left var(--transition-normal);box-shadow:var(--shadow-lg);z-index:1001;overflow-y:auto}.nav-item{width:100%;text-align:left}.nav-menu.active{left:0}.nav-search{display:none}.nav-search-input{flex:1;padding:10px 15px;border:1px solid var(--color-gray);border-right:none;border-radius:var(--radius-sm) 0 0 var(--radius-sm);font-size:var(--font-size-sm);outline:none}.nav-search-input:focus{border-color:var(--color-secondary)}.nav-search-btn{padding:10px 15px;background-color:var(--color-secondary);color:var(--color-white);border:none;border-radius:0 var(--radius-sm) var(--radius-sm) 0;cursor:pointer;transition:background-color var(--transition-fast)}.nav-search-btn:hover{background-color:#ea580c}.nav-link{padding:var(--spacing-md) var(--spacing-lg);border-bottom:1px solid var(--color-gray);color:var(--color-text);text-transform:none;font-size:var(--font-size-sm);font-weight:400;display:block;text-align:left}.nav-link:hover,.nav-link.active{background-color:var(--color-light-gray);color:var(--color-menu-hover)}.nav-item.has-dropdown .nav-link{display:flex;justify-content:space-between;align-items:center}.nav-item.has-dropdown .nav-link:after{content:"›";font-size:1.2rem;color:var(--color-text-secondary);font-weight:300;transition:transform var(--transition-fast)}.nav-item.has-dropdown.open .nav-link:after{transform:rotate(90deg)}.nav-dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;background-color:var(--color-light-gray);display:none;border-radius:0;max-height:0;overflow:hidden;transition:max-height var(--transition-normal)}.nav-item.has-dropdown.open .nav-dropdown{display:block;max-height:500px}.nav-dropdown-link{padding:var(--spacing-sm) var(--spacing-lg);padding-left:var(--spacing-lg);color:var(--color-text-secondary);font-size:var(--font-size-sm);border-bottom:1px solid var(--color-gray)}.nav-dropdown-link:hover{background-color:var(--color-gray);color:var(--color-menu-hover);padding-left:var(--spacing-xl)}.nav-item.active .nav-dropdown{display:block}.nav-overlay{display:block;position:fixed;top:0;left:300px;width:calc(100% - 300px);height:100%;background-color:#00000080;z-index:1000;opacity:0;pointer-events:none;transition:opacity var(--transition-fast)}.nav-overlay.active{opacity:1;pointer-events:auto}.hero{height:350px}.hero-title{font-size:var(--font-size-xl)}.hero-subtitle{font-size:var(--font-size-sm)}.about{grid-template-columns:1fr;gap:var(--spacing-lg)}.about-features{grid-template-columns:1fr}.services-grid{grid-template-columns:1fr;gap:var(--spacing-md)}.projects-grid,.news-grid{grid-template-columns:1fr}.footer-content{grid-template-columns:1fr;gap:var(--spacing-lg)}.floating-buttons{right:15px;left:auto;bottom:15px}.floating-buttons.pushed-up{bottom:70px}.floating-btn{width:45px;height:45px}}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.mt-1{margin-top:var(--spacing-sm)}.mt-2{margin-top:var(--spacing-md)}.mt-3{margin-top:var(--spacing-lg)}.mt-4{margin-top:var(--spacing-xl)}.mb-1{margin-bottom:var(--spacing-sm)}.mb-2{margin-bottom:var(--spacing-md)}.mb-3{margin-bottom:var(--spacing-lg)}.mb-4{margin-bottom:var(--spacing-xl)}.hidden{display:none}.visible{display:block}.fade-in{animation:fadeIn .5s ease forwards}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.hero-swiper{position:absolute;top:0;left:0;width:100%;height:100%}.hero-swiper .swiper-slide{position:relative}.hero-swiper .swiper-slide img{width:100%;height:100%;object-fit:cover}.hero-swiper .swiper-button-prev,.hero-swiper .swiper-button-next{color:var(--color-white);background-color:#0000004d;width:50px;height:50px;border-radius:50%;transition:all var(--transition-fast)}.hero-swiper .swiper-button-prev:hover,.hero-swiper .swiper-button-next:hover{background-color:var(--color-secondary)}.hero-swiper .swiper-button-prev:after,.hero-swiper .swiper-button-next:after{font-size:18px;font-weight:700}.hero-swiper .swiper-pagination{bottom:20px}.hero-swiper .swiper-pagination-bullet{width:12px;height:12px;background-color:#ffffff80;opacity:1;transition:all var(--transition-fast)}.hero-swiper .swiper-pagination-bullet-active{background-color:var(--color-secondary);transform:scale(1.2)}.hero-progress{position:absolute;bottom:0;left:0;width:100%;height:4px;background-color:#ffffff4d;z-index:20}.hero-progress-bar{height:100%;width:0%;background:linear-gradient(to right,var(--color-secondary),var(--color-primary));border-radius:0 2px 2px 0}@media (max-width: 768px){.hero-swiper .swiper-button-prev,.hero-swiper .swiper-button-next{width:40px;height:40px}.hero-swiper .swiper-button-prev:after,.hero-swiper .swiper-button-next:after{font-size:14px}.hero-swiper .swiper-pagination-bullet{width:10px;height:10px}}.video-slider-wrapper{position:relative;padding:0 50px}.video-swiper{overflow:hidden}.video-card{cursor:pointer;border-radius:var(--radius-md);overflow:hidden;background:var(--color-white);box-shadow:var(--shadow-sm);transition:all var(--transition-normal)}.video-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}.video-thumbnail{position:relative;width:100%;aspect-ratio:16 / 9;overflow:hidden}.video-thumbnail img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-normal)}.video-card:hover .video-thumbnail img{transform:scale(1.05)}.video-play-overlay{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:#0000004d;transition:all var(--transition-normal)}.video-play-overlay i{font-size:50px;color:red;transition:transform var(--transition-normal);filter:drop-shadow(0 2px 4px rgba(0,0,0,.3))}.video-card:hover .video-play-overlay{background:#00000080}.video-card:hover .video-play-overlay i{transform:scale(1.1)}.video-title{padding:12px 15px;font-size:var(--font-size-sm);font-weight:500;color:var(--color-text);text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.video-swiper-prev,.video-swiper-next{position:absolute;top:50%;transform:translateY(-50%);width:40px;height:40px;background:var(--color-secondary);color:var(--color-white);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:10;transition:all var(--transition-fast);box-shadow:var(--shadow-sm)}.video-swiper-prev:hover,.video-swiper-next:hover{background:var(--color-secondary-dark);transform:translateY(-50%) scale(1.1)}.video-swiper-prev{left:0}.video-swiper-next{right:0}.video-modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;z-index:9999;align-items:center;justify-content:center}.video-modal.active{display:flex}.video-modal-backdrop{position:absolute;top:0;left:0;width:100%;height:100%;background:#000000e6}.video-modal-content{position:relative;width:90%;max-width:900px;z-index:1}.video-modal-close{position:absolute;top:-40px;right:0;width:36px;height:36px;background:transparent;border:none;color:var(--color-white);font-size:30px;cursor:pointer;transition:transform var(--transition-fast)}.video-modal-close:hover{transform:scale(1.2)}.video-modal-iframe-wrapper{position:relative;width:100%;padding-top:56.25%;background:#000;border-radius:var(--radius-md);overflow:hidden}.video-modal-iframe-wrapper iframe{position:absolute;top:0;left:0;width:100%;height:100%}@media (max-width: 768px){.video-slider-wrapper{padding:0 40px}.video-swiper-prev,.video-swiper-next{width:32px;height:32px}.video-swiper-prev i,.video-swiper-next i{font-size:12px}.video-play-overlay i{font-size:40px}.video-modal-content{width:95%}.video-modal-close{top:-35px;right:-5px}}.floating-buttons{position:fixed;right:20px;bottom:20px;display:flex;flex-direction:column;gap:12px;z-index:999;transition:bottom .3s ease}.floating-buttons.pushed-up{bottom:85px}.floating-btn{width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--color-white);font-size:20px;box-shadow:0 4px 15px #0003;transition:all .3s cubic-bezier(.4,0,.2,1);animation:floatPulse 2s ease-in-out infinite}.floating-btn:hover{transform:scale(1.1) translateY(-3px);box-shadow:0 6px 25px #0000004d}.floating-btn.phone{background:linear-gradient(135deg,#25d366,#128c7e)}.floating-btn.zalo{background:linear-gradient(135deg,#0068ff,#0046ab)}.floating-btn.map{background:linear-gradient(135deg,#ea4335,#c5221f)}@keyframes floatPulse{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}.back-to-top{position:fixed;right:20px;bottom:20px;width:50px;height:50px;border-radius:50%;border:none;background-color:var(--color-secondary-dark);color:var(--color-white);display:flex;align-items:center;justify-content:center;font-size:20px;cursor:pointer;z-index:998;opacity:0;visibility:hidden;box-shadow:0 4px 15px #0003;transition:all .3s cubic-bezier(.4,0,.2,1)}.back-to-top.visible{opacity:1;visibility:visible;animation:floatPulse 2s ease-in-out infinite}.back-to-top:hover{transform:scale(1.1) translateY(-3px);box-shadow:0 6px 25px #0000004d}@media (max-width: 768px){.floating-buttons{right:15px;bottom:15px;gap:10px}.floating-buttons.pushed-up{bottom:70px}.floating-btn{width:45px;height:45px;font-size:18px}.back-to-top{right:15px;bottom:15px;width:45px;height:45px;font-size:18px}}