* {
    margin: 0px;
    padding: 0px;
}
.main {
    margin-top: 75px;
}
.container {
    width: 1300px;
    margin: 0 auto;
}
.header {
    background-color: #ff0000;
    height: 75px;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}
.logo_ngua img{
    height: 75px;
    width: 75px;
    cursor: pointer;
}
.navbar {
    display: flex;
}
.list  {
    display: flex;
    margin: 30px;
    gap: 50px;
    list-style: none;
    padding-left:90px;
}
.list a{
    text-decoration: none;
    color: white;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 17px;
    font-weight: bold;
}
.main h1 {
    padding-top: 20px;
    text-align: center;
}
.slider {
    position: relative;
    width: 100%;
    max-width: 1000px;
    height: 450px;
    margin: 20px auto;
    overflow: hidden;
    border-radius: 15px;       
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}
.slides img {
    width: 100%;
    height: 100%;
    object-fit: cover; 
    display: none;
}

.slides img.active {
    display: block;
}


.dots {
    position: absolute;
    bottom: 15px;
    width: 100%;
    text-align: center;
}

.dot {
    height: 12px;
    width: 12px;
    margin: 0 6px;
    background-color: rgba(255,255,255,0.6);
    border-radius: 50%;
    display: inline-block;
    cursor: pointer;
    transition: 0.3s ease;   
}

.dot.active {
    background-color: red;
    transform: scale(1.2);  
}
.intro {
    width: 100%;
    margin: 10px 0;
    line-height: 1.7;
    font-size: 20px;
}
.section-title {
    text-align: left;
    margin-top: 50px;
    font-size: 30px;
    border-bottom: 1px solid #ccc; 
}
.container h2{
    text-align: left;
    margin-top: 20px;
    font-size: 30px;
    border-bottom: 1px solid #ccc; 
}
.container .gioithieu {
    text-align: left;
    margin-top: 80px;
    font-size: 30px;
    border-bottom: 1px solid #ccc; 
}
.container p{
    font-family: Arial, Helvetica, sans-serif;
    width: 100%;
    margin: 10px 0;
    line-height: 1.7;
    font-size: 20px;
}
.gioithieu-list  {
    margin: 10px 0px;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.7;
    font-size: 20px;
    list-style-position: inside;
}
.gioithieu-list li {
    padding-left: 20px;
}
#map {
    height: 400px;
    width: 100%;
    max-width: 1000px;
    margin: 10px auto;
    border-radius: 12px;
}
.image-box {
    display: flex;
    gap: 30px;              
    margin: 40px 0;
}

.image-box img {
    width: 50%;             
    height: 400px;         
    object-fit: cover;     
    border-radius: 15px;
}
.container .phong-tuc {
    text-align: left;
    margin-top: 100px;
    font-size: 30px;
    border-bottom: 1px solid #ccc; 
}
.container .mamnguqua {
    height: 500px;
    width: 100%;
}
.container iframe{
    width: 350px;              
    margin: 40px auto;         
    border-radius: 16px;       
    overflow: hidden;          
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    transition: 0.3s ease;
}
.contact-section {
    width: 100%;
    max-width: 600px;
    margin: 50px auto;
    text-align: center;
    padding-top: 50px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-form input,
.contact-form textarea {
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #ccc;
    font-size: 16px;
}

.contact-form button {
    padding: 12px;
    background-color: #d62828;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.3s;
}

.contact-form button:hover {
    background-color: #a4161a;
}