@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap');

:root {
    --primary-color: #003366;
    --secondary-color: #FFD700;
    --accent-color: #FF8C00;
    --text-color: #333333;
    --light-bg: #F8F9FA;
    --white: #FFFFFF;
    --glass-bg: rgba(255, 255, 255, 0.8);
    --transition: all 0.3s ease;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Glassmorphism Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo img {
    height: 50px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-weight: 600;
    color: var(--primary-color);
}

.nav-links a:hover {
    color: var(--accent-color);
}

.btn-call {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 15px rgba(0, 51, 102, 0.3);
}

.btn-call:hover {
    transform: translateY(-2px);
    background-color: var(--secondary-color);
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 51, 102, 0.6), rgba(0, 0, 0, 0.7)), url('banner_new.png');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    margin-top: 0;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: -1px;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.5);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Services */
.services {
    padding: 100px 0;
    background-color: var(--light-bg);
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.section-title .underline {
    width: 80px;
    height: 4px;
    background-color: var(--secondary-color);
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid #eee;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.service-card h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

/* Core Strengths */
.strengths {
    padding: 100px 0;
}

.strengths-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.strengths-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.strength-item {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
}

.strength-icon {
    min-width: 50px;
    height: 50px;
    background-color: rgba(255, 215, 0, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    font-weight: bold;
}

/* Photo Gallery */
.gallery {
    padding: 100px 0;
    background-color: #eee;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.gallery-item {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-item:hover img {
    scale: 1.1;
}

/* Floating Buttons */
.floating-btns {
    position: fixed;
    right: 20px;
    bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 2000;
}

.f-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
}

.f-btn:hover {
    transform: scale(1.1);
}

.btn-zalo {
    background-color: #0068FF;
}

.btn-facebook {
    background-color: #1877F2;
}

.btn-phone {
    background-color: #4CAF50;
}

/* District Blog Section */
.blog {
    padding: 80px 0;
}

.district-links {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
    margin-top: 40px;
}

.district-btn {
    padding: 10px 20px;
    background-color: var(--white);
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 5px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
}

.district-btn:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 80px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-col h4 {
    margin-bottom: 25px;
    font-size: 1.2rem;
    position: relative;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--secondary-color);
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    flex-wrap: wrap;
    gap: 10px;
}

.footer-bottom a {
    color: var(--secondary-color);
}

.footer-bottom a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .footer-bottom {
        justify-content: center;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .nav-links {
        display: none;
    }

    .strengths-container {
        grid-template-columns: 1fr;
    }
}