* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Inter', system-ui, -apple-system, 'Roboto', 'Helvetica Neue', sans-serif;
    background-color: #f5f9f0;
    color: #1a2c1e;
    line-height: 1.5;
}

/* container chính */
.container {
    max-width: 1280px;
    margin: 0 auto;
    background-color: #ffffff;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    overflow-x: hidden;
}

/* HEADER với logo kiểu Vinpearl */
.header {
    background: linear-gradient(135deg, #0b3b2f 0%, #1a5a48 100%);
    padding: 1.2rem 2rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    border-bottom: 3px solid #e6b422;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: 1px;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.logo span {
    font-weight: 400;
    font-size: 1rem;
    color: #ffe0a3;
}

/* nav thanh điều hướng */
.main-nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 1.8rem;
    list-style: none;
}

.main-nav a {
    color: #fef9e6;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: 0.2s;
    padding: 0.3rem 0;
    border-bottom: 2px solid transparent;
}

.main-nav a:hover {
    border-bottom-color: #f5c542;
    color: #ffeaaf;
}

/* phần sub-nav (mục lục: Khách sạn, Ưu đãi) */
.sub-nav {
    background-color: #fef6e0;
    padding: 0.7rem 2rem;
    border-bottom: 1px solid #e2dccd;
}

.sub-nav ul {
    display: flex;
    gap: 2.5rem;
    list-style: none;
    align-items: center;
}

.sub-nav li:first-child {
    font-weight: 700;
    color: #5a3e1b;
    margin-right: 0.5rem;
}

.sub-nav a {
    text-decoration: none;
    color: #2c5a2e;
    font-weight: 500;
    padding: 0.25rem 0;
    border-bottom: 1px dotted transparent;
    transition: 0.2s;
}

.sub-nav a:hover {
    color: #ca9622;
    border-bottom-color: #ca9622;
}

/* hero / banner ảnh minh họa */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.45), rgba(0, 0, 0, 0.45)), url('https://placehold.co/1920x600/2f6b47/ffffff?text=Vinh+Ha+Long') center/cover no-repeat;
    background-image: url('https://images.pexels.com/photos/2468773/pexels-photo-2468773.jpeg?auto=compress&cs=tinysrgb&w=1600');
    background-size: cover;
    background-position: center 35%;
    min-height: 360px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.hero-text h1 {
    font-size: 2.6rem;
    font-weight: 800;
    background-color: rgba(0, 0, 0, 0.5);
    display: inline-block;
    padding: 0.5rem 1.8rem;
    border-radius: 40px;
    backdrop-filter: blur(3px);
    letter-spacing: 1px;
}

@media (max-width: 700px) {
    .hero-text h1 {
        font-size: 1.8rem;
    }
}

/* nội dung chính: top 1 địa điểm (Vịnh Hạ Long) */
.content {
    padding: 2rem 2rem 3rem;
}

.section-title {
    font-size: 1.9rem;
    font-weight: 700;
    color: #1b4d2e;
    border-left: 8px solid #e6b422;
    padding-left: 1rem;
    margin-bottom: 1.5rem;
    margin-top: 1rem;
}

.destination-card {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    background: #fefef7;
    border-radius: 28px;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    margin-bottom: 2rem;
    transition: 0.2s;
}

.destination-img {
    flex: 1.2;
    min-width: 260px;
    background-color: #d9e6cf;
    background-image: url('https://images.pexels.com/photos/1450360/pexels-photo-1450360.jpeg?auto=compress&cs=tinysrgb&w=800');
    background-size: cover;
    background-position: center;
    min-height: 280px;
}

.destination-info {
    flex: 2;
    padding: 1.8rem 2rem 2rem 1.2rem;
}

.destination-info h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1e4620;
    margin-bottom: 1rem;
}

.destination-info p {
    margin-bottom: 1rem;
    font-size: 1.05rem;
    color: #2c3a2b;
    text-align: justify;
}

.highlight-text {
    background-color: #fef2da;
    padding: 0.8rem 1.2rem;
    border-radius: 20px;
    font-style: italic;
    border-left: 4px solid #e6b422;
    margin-top: 1rem;
}

/* mục lục phụ - giới thiệu thêm về Vịnh Hạ Long */
.extra-feature {
    margin-top: 2rem;
    background: #f9f9ef;
    padding: 1.5rem;
    border-radius: 28px;
}

.stats {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: space-between;
    margin-top: 1rem;
}

.stat-item {
    background: white;
    border-radius: 36px;
    padding: 0.8rem 1.8rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    flex: 1;
    text-align: center;
    font-weight: 600;
    color: #2e6b3e;
}

.stat-number {
    font-size: 1.8rem;
    font-weight: 800;
    color: #ca9622;
}

/* thông tin liên hệ nhóm */
.contact-section {
    margin-top: 3rem;
    background: #f1f8ec;
    padding: 1.8rem 2rem;
    border: 1px solid #e2e6d9;
}

.contact-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1b4d2e;
    margin-bottom: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.contact-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1.2rem 2rem;
    list-style: none;
    margin-bottom: 1rem;
}


footer {
    background-color: #0e2e22;
    color: #d1e0c5;
    text-align: center;
    padding: 1.6rem;
    font-size: 0.85rem;
    border-top: 1px solid #2b5a43;
}

hr {
    margin: 1rem 0;
    border: 0;
    height: 1px;
    background: linear-gradient(to right, #ddd, transparent);
}

@media (max-width: 780px) {
    .header {
        flex-direction: column;
        gap: 0.8rem;
        text-align: center;
    }

    .main-nav ul {
        justify-content: center;
        gap: 1.2rem;
    }

    .sub-nav ul {
        flex-wrap: wrap;
        gap: 1rem;
        justify-content: center;
    }

    .destination-info {
        padding: 1.2rem;
    }
}