.banner-section{position:relative}.banner-image img{display:block;width:100%;height:auto}.banner-image::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(to bottom,rgba(0,3,148,.3),rgba(0,0,0,.3));pointer-events:none}section#yamaha-function-wrapper img{height:100px}.list-group-item{font-size:1.2rem;border:none;background-color:transparent;color:#555;padding:15px;cursor:pointer;transition:all .3s ease;border:1pt solid #eee;margin-bottom:5px;width:96%}.list-group-item+.list-group-item{border-top-width:1px}.list-group-item:hover{background-color:#f0f0f0;transform:translateX(10px)}.list-group-item.active{background-color:var(--primary-color);color:#fff;border-radius:5px;box-shadow:0 4px 12px rgba(0,123,255,.2);position:relative}@media (max-width:768px){.list-group-item.active{margin-bottom:15px}}.tab-content>.tab-pane{background-color:#e9f0fa;border-radius:12px;padding:30px;animation:fadeIn .5s ease-out}.list-group-item.active::after{content:"";position:absolute;right:-16px;top:50%;transform:translateY(-50%);border-width:8px;border-style:solid;border-color:transparent transparent transparent var(--primary-color)}@media (max-width:768px){.list-group-item.active::after{right:auto;left:50%;top:auto;bottom:-16px;transform:translateX(-50%);border-color:var(--primary-color) transparent transparent transparent}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}100%{opacity:1;transform:translateY(0)}}.tab-pane h4{font-size:2rem;font-weight:600;color:#333;margin-bottom:20px}.tab-pane p{font-size:1.1rem;color:#666;line-height:1.6;margin-bottom:20px}.tab-pane li{font-size:1.1rem;color:#666}.list-group-item:hover{background-color:#e8f1ff;color:var(--primary-color);transform:scale(1.05)}.col-md-3{padding-right:0}.col-md-9{padding-left:0}@media (max-width:768px){.col-md-3{margin-bottom:20px}.col-md-9{margin-left:0}.tab-content{padding:20px}}.text-blue{color:var(--primary-color)}#yamaha_function{justify-content:center;gap:20px}#yamaha_function .nav-link{color:var(--primary-color);font-weight:500;min-width:200px}#yamaha_function .nav-link.active{border:1px solid var(--primary-color);color:#fff!important;background-color:var(--primary-color)!important;font-weight:500}@media (max-width:768px) and (min-width:480px){#yamaha_function .nav-link{min-width:auto}}@media (max-width:480px){#yamaha_function .nav-link{min-width:150px}}.nav-boxes{margin:20px 20px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;justify-content:center}.nav-boxes .nav-item{text-align:center;border-radius:8px;overflow:hidden;transition:transform .3s ease,box-shadow .3s ease;box-shadow:0 4px 8px rgba(0,0,0,.1);background-color:#f8f9fa;height:70px}@media (max-width:600px){.nav-boxes .nav-item{width:100%}}.nav-boxes .nav-item:hover{transform:translateY(-10px);box-shadow:0 8px 16px rgba(0,0,0,.2)}.nav-boxes .nav-item .nav-link{display:block;padding:8px;text-decoration:none;font-weight:700;font-size:1.2rem;color:var(--primary-color);transition:color .3s ease,background-color .3s ease;width:100%;height:100%}.nav-boxes .nav-item .nav-link.active{background-color:var(--primary-color);color:#fff}