:root {
    --primary: #f59e0b;      /* Strong Amber / Gold */
    --primary-hover: #d97706;
    --secondary: #1e293b;    /* Slate Dark Blue */
    --text-main: #334155;
    --text-muted: #64748b;
    --bg-light: #f8fafc;
    --white: #ffffff;
    --black: #0f172a;
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Be Vietnam Pro', sans-serif;
    --radius-md: 12px;
    --radius-lg: 24px;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-main);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--black);
    font-weight: 700;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
}

.section {
    padding: 100px 0;
}

.section-subtitle {
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.text-center {
    text-align: center;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 50px;
    font-family: var(--font-heading);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.6);
}

.btn-secondary {
    background-color: var(--white);
    color: var(--black);
}

.btn-secondary:hover {
    background-color: #f1f5f9;
    color: var(--primary);
    transform: translateY(-2px);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 160px;
}

.logo {
    max-height: 140px;
    height: 140px;
    width: auto;
    max-width: 500px;
    object-fit: contain;
    transform: scale(1.7);
    transform-origin: left center;
    transition: all 0.3s ease;
}

.header.scrolled .logo {
    max-height: 90px;
    height: 90px;
    transform: scale(1.6);
}

.logo:hover {
    transform: scale(1.8);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--secondary);
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--primary);
}

.nav-link:hover::after {
    width: 100%;
}

.btn-contact {
    background-color: var(--secondary);
    color: var(--white);
    padding: 10px 24px;
    border-radius: 50px;
}

.btn-contact::after {
    display: none;
}

.btn-contact:hover {
    background-color: var(--primary);
    color: var(--white);
}

.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--secondary);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    color: var(--white);
    padding-top: 160px; /* Offset header */
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    z-index: -2;
    animation: zoomOut 20s infinite alternate;
}

@keyframes zoomOut {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(15, 23, 42, 0.8) 0%, rgba(15, 23, 42, 0.3) 100%);
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    animation: fadeInUp 1s ease-out forwards;
}

.hero-subtitle {
    color: var(--primary);
    font-size: 1rem;
    letter-spacing: 2px;
    margin-bottom: 15px;
    text-transform: uppercase;
}

.hero-title {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 25px;
    color: var(--white);
}

.hero-title .highlight {
    color: var(--primary);
}

.hero-desc {
    font-size: 1.2rem;
    max-width: 600px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-actions {
    display: flex;
    gap: 20px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* About Section */
.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
}

.about-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transition: transform 0.5s ease;
}

.about-image:hover {
    transform: scale(1.02);
}

.experience-badge {
    position: absolute;
    bottom: -30px;
    right: -30px;
    background-color: var(--primary);
    color: var(--white);
    padding: 30px;
    border-radius: 50%;
    width: 150px;
    height: 150px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    text-align: center;
    border: 5px solid var(--white);
    animation: float 3s ease-in-out infinite;
}

.exp-years {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    font-family: var(--font-heading);
}

.exp-text {
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 600;
}

@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0); }
}

.about-text {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 30px;
}

.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.info-item {
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.info-icon {
    font-size: 1.5rem;
    color: var(--primary);
    background-color: rgba(245, 158, 11, 0.1);
    padding: 15px;
    border-radius: 50%;
}

.info-item h4 {
    margin-bottom: 5px;
}

.info-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Services */
.bg-light {
    background-color: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border-bottom: 4px solid transparent;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--primary);
}

.service-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.service-title {
    margin-bottom: 15px;
}

.service-desc {
    color: var(--text-muted);
}

/* Stories Grid */
.stories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.story-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.4s ease;
    border: 1px solid #e2e8f0;
}

.story-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.story-img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.story-card:hover .story-img {
    transform: scale(1.05);
}

.story-content {
    padding: 30px;
    background-color: var(--white);
    position: relative;
}

.story-content h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--black);
}

.story-meta {
    font-size: 0.95rem;
    color: var(--primary);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.story-text {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.6;
}

/* Pricing */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
    max-width: 900px;
    margin: 40px auto 0;
}

.pricing-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
    position: relative;
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.pricing-card.premium {
    border: 2px solid var(--primary);
    box-shadow: var(--shadow-md);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: var(--white);
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
}

.pricing-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 25px;
    border-bottom: 1px solid #e2e8f0;
}

.pricing-header h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.price {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary);
    font-family: var(--font-heading);
}

.price span {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 400;
}

.pricing-features {
    flex-grow: 1;
    margin-bottom: 30px;
}

.pricing-features li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.pricing-features li i {
    color: var(--primary);
}

.pricing-card .btn {
    text-align: center;
    width: 100%;
}

/* Contact */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.glass-panel {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.95) 100%);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.contact-title {
    color: var(--white);
    margin-bottom: 30px;
    font-size: 2rem;
}

.company-details {
    margin-bottom: 30px;
}

.company-details li {
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.company-details li:last-child {
    border-bottom: none;
}

.company-details strong {
    color: var(--primary);
    margin-right: 10px;
}

.address-box {
    display: flex;
    gap: 15px;
    align-items: flex-start;
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: var(--radius-md);
}

.address-box i {
    color: var(--primary);
    font-size: 1.5rem;
}

.contact-form-panel {
    padding: 20px;
}

.form-title {
    margin-bottom: 25px;
    font-size: 1.8rem;
}

.form-group {
    margin-bottom: 20px;
}

.form-control {
    width: 100%;
    padding: 15px 20px;
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-md);
    background-color: var(--bg-light);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}

.btn-submit {
    width: 100%;
}

/* Footer */
.footer {
    background-color: var(--secondary);
    color: var(--white);
    padding-top: 80px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    height: 100px;
    margin-bottom: 20px;
    filter: brightness(0) invert(1);
    transform: scale(1.7);
    transform-origin: left center;
}

.footer-brand p {
    color: #cbd5e1;
    margin-bottom: 20px;
}

.footer-links h4 {
    color: var(--white);
    margin-bottom: 20px;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    color: #cbd5e1;
    transition: color 0.3s ease;
}

.footer-links ul li a:hover {
    color: var(--primary);
}

.footer-contact ul li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: #cbd5e1;
}

.footer-contact ul li i {
    margin-top: 4px;
    color: var(--primary);
}

.footer-bottom {
    background-color: #0f172a;
    text-align: center;
    padding: 20px 0;
    color: #94a3b8;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 992px) {
    .about-container {
        grid-template-columns: 1fr;
    }
    
    .experience-badge {
        right: 20px;
        bottom: 20px;
        width: 120px;
        height: 120px;
        padding: 20px;
    }
    
    .exp-years { font-size: 2rem; }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .logo {
        max-height: 80px;
    }
    
    .nav {
        position: absolute;
        top: 160px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        box-shadow: var(--shadow-sm);
        padding: 20px;
        clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
        transition: clip-path 0.4s ease-in-out;
    }
    
    .nav.active {
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
}

/* Subpage Styles */
.subpage-header {
    padding: 220px 0 100px;
    background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.9)), url('../Zalo_img/z5304653181968_7de39432fd39e6763b8ef9870ebb1d86.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--white);
    text-align: center;
}

.subpage-header.service-1 {
    background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.9)), url('../Zalo_img/z5304653202297_2e7d263559c2f89f0290842290c06124.jpg');
    background-size: cover;
    background-position: center;
}

.subpage-header.service-2 {
    background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.9)), url('../Zalo_img/z5304653217357_0714f8db44dbdf3ec9d72829afa2617a.jpg');
    background-size: cover;
    background-position: center;
}

.subpage-header.service-3 {
    background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.9)), url('../Zalo_img/z5304653241021_cd5b23e0903287890c48521701779bb1.jpg');
    background-size: cover;
    background-position: center;
}

.subpage-title {
    font-size: 3.5rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.subpage-desc {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    color: #cbd5e1;
    line-height: 1.6;
}

.service-detail-content {
    padding: 80px 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

@media (max-width: 900px) {
    .service-detail-content {
        grid-template-columns: 1fr;
    }
}

.service-detail-text h3 {
    font-size: 2rem;
    margin-bottom: 25px;
    color: var(--secondary);
}

.service-detail-text p {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

.service-detail-text ul {
    list-style: none;
    margin-top: 25px;
}

.service-detail-text ul li {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
    gap: 15px;
    font-size: 1.05rem;
    color: var(--black);
}

.service-detail-text ul li i {
    color: var(--primary);
    margin-top: 5px;
    font-size: 1.2rem;
}

.service-detail-img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 5px solid white;
}