/* CSS Reset and Base Styles */
:root {
    --brand-blue: #0052CC;
    --brand-blue-dark: #003E99;
    --brand-yellow: #FFC400;
    --brand-orange: #FF7B00;
    --text-primary: #172B4D;
    --text-secondary: #6B778C;
    --bg-light: #FFFFFF;
    --bg-secondary: #F4F5F7;
    --border-color: #DFE1E6;
    --font-global: 'Open Sans', sans-serif;
}

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

body {
    font-family: var(--font-global);
    background-color: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.7;
    scroll-behavior: smooth;
}
body.no-scroll {
    overflow: hidden;
}

html {
    scroll-padding-top: 80px; /* Offset for sticky header */
}

/* General Utility Styles */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}
.section-padding {
    padding: 80px 0;
}
.section-bg {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

h1, h2, h3, h4 {
    font-family: var(--font-global);
    color: var(--text-primary);
    font-weight: 700;
}

h1 { font-size: 3.2rem; line-height: 1.2; }
h2 { font-size: 2.5rem; margin-bottom: 1.5rem; text-align: center; color: var(--brand-blue-dark); }
h3 { font-size: 1.5rem; margin-bottom: 1rem; }
.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    max-width: 700px;
    margin: -1rem auto 3rem auto;
    font-size: 1.1rem;
}
.section-title-light {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    text-align: center;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

a {
    color: var(--brand-blue);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #003e99;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 700;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-family: var(--font-global);
    font-size: 0.95rem;
    text-align: center;
}

.btn-primary {
    background-color: var(--brand-blue);
    color: var(--bg-light);
    box-shadow: 0 4px 15px rgba(0, 82, 204, 0.15);
}

.btn-primary:hover {
    transform: translateY(-2px);
    background-color: var(--brand-blue-dark);
    box-shadow: 0 6px 20px rgba(0, 82, 204, 0.2);
}

.btn-secondary {
    background-color: transparent;
    color: var(--brand-blue);
    border: 2px solid var(--brand-blue);
}

.btn-secondary:hover {
    background-color: var(--brand-blue);
    color: var(--bg-light);
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    min-height: 90vh;
    background-image: url('https://tourwell.vn/storage/photos/shares/saokhue1.jpg');
    background-size: cover;
    background-position: center;
    position: relative;
}
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(75deg, rgba(0, 42, 102, 0.9) 0%, rgba(0, 82, 204, 0.5) 50%, rgba(255, 196, 0, 0.1) 100%);
}
.hero .container {
    position: relative;
    z-index: 2;
}
.hero-content {
    max-width: 650px;
    text-align: left;
}
.hero h1, .hero p {
    color: #FFFFFF;
}
.hero h1 {
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}
.hero h1 .highlight {
    color: var(--brand-yellow);
}
.hero p {
    font-size: 1.2rem;
    font-weight: 400;
    max-width: 600px;
    margin: 0 0 2.5rem 0;
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.hero-buttons {
    display: flex;
    justify-content: flex-start;
    gap: 1rem;
}

/* Credit Block (Trusted by) */
#credit-block {
    padding: 60px 0;
}

/* Awards Section */
#awards {
    padding: 80px 0;
    background-color: #0d1e3a;
    background-image: linear-gradient(75deg, rgba(0, 42, 102, 0.95) 0%, rgba(0, 82, 204, 0.85) 100%), url('https://images.unsplash.com/photo-1603126845372-984a0d87a48d?q=80&w=1974&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    position: relative;
}
#awards h2 {
    color: #FFFFFF;
    margin-bottom: 3rem;
}
.awards-grid {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}
.award-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background-color: rgba(255, 255, 255, 0.1);
    padding: 1rem 1.5rem;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    max-width: 400px;
    backdrop-filter: blur(5px);
    transition: all 0.3s ease;
}
.award-item:hover {
    transform: translateY(-5px);
    background-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 6px 15px rgba(0,0,0,0.1);
}
.award-item img {
    height: 50px;
    margin-bottom: 0;
    object-fit: contain;
}
.award-item p {
    font-family: var(--font-global);
    font-weight: 600;
    color: #FFFFFF;
    font-size: 1rem;
    margin-bottom: 0;
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--bg-light);
    padding: 2.5rem 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}
.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}
.feature-icon {
    font-size: 2.5rem;
    color: var(--brand-blue);
    margin-bottom: 1.5rem;
}

/* Core Features Sections */
.core-feature-section {
    display: flex;
    align-items: center;
    gap: 3rem;
}

#core-feature-ops .core-feature-section {
    flex-direction: row-reverse;
}

.feature-content {
    flex: 1;
}

.feature-content h3 {
    font-size: 2rem;
    color: var(--brand-blue-dark);
    margin-bottom: 1.5rem;
}
/* START: Feature Title Styles */
.feature-subtitle {
    color: var(--brand-yellow);
    font-weight: 700;
    margin-bottom: 0.1rem;
    font-size: 1.2rem;
}
.feature-content h3 .highlight-yellow {
    color: var(--brand-yellow);
}
/* END: Feature Title Styles */

.feature-list {
    list-style: none;
    padding-left: 0;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.feature-list .fa-check-circle {
    color: var(--brand-blue);
    margin-top: 5px;
}

.feature-image-container {
    flex: 1;
    text-align: center;
}
.feature-image-container img {
    max-width: 100%;
    height: auto;
}

/* Other Features Section */
#other-features h2 {
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 4rem;
}
#other-features h2::before,
#other-features h2::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 50px;
    height: 2px;
    background-color: var(--brand-orange);
}
#other-features h2::before {
    left: -65px;
}
#other-features h2::after {
    right: -65px;
}

.other-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2.5rem;
}

.other-feature-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.other-feature-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background-color: var(--brand-blue);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.other-feature-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.other-feature-content p {
    margin-bottom: 0;
}

.other-features-cta {
    text-align: center;
    margin-top: 4rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.other-features-cta .btn-secondary {
    border-color: var(--brand-orange);
    color: var(--brand-orange);
}
.other-features-cta .btn-secondary:hover {
    background-color: var(--brand-orange);
    color: white;
}


/* News & Success Stories Sections */
.story-grid, .activity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}
.story-card {
    background-color: var(--bg-light);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}
.story-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}
.story-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}
.story-card-content {
    padding: 1.5rem;
}
.story-card-content h3 {
    font-size: 1.25rem;
}

.story-card-content h3 a, .activity-card-content h3 a{
    color: var(--text-primary);
}

.activity-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    background-color: var(--bg-light);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}
.activity-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.activity-card .activity-card-image-container {
    flex: 1 1 33.33%;
    max-width: 33.33%;
}
.activity-card img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    object-fit: cover;
    flex-shrink: 0;
}
.activity-card-content {
    padding: 0;
    flex: 1 1 66.67%;
}


.activity-card-content h3 {
    font-size: 1.15rem;
    margin: 0;
}

/* Logos Section */
.logo-strip {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 3rem;
}
.logo-strip img {
    height: 40px;
    max-width: 150px;
    object-fit: contain;
    transition: all 0.3s ease;
}
.logo-strip img:hover {
    transform: scale(1.05);
}

/* Testimonials Section */
#testimonials {
    background-color: #0d1e3a; /* Fallback color */
    background-image:
        linear-gradient(75deg, rgba(0, 42, 102, 0.95) 0%, rgba(0, 82, 204, 0.8) 100%),
        url('https://images.unsplash.com/photo-1519046904884-53103b34b206?q=80&w=2070&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D');
    background-size: cover;
    background-position: center;
    color: #FFFFFF;
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.testimonial-slider {
    position: relative;
}
.testimonial-slider-track {
    display: flex;
    transition: transform 0.5s ease-in-out;
}
.testimonial-slide {
    min-width: 100%;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    gap: 4rem;
    padding: 0 5%;
}
.testimonial-text {
    flex-basis: 55%;
}
.testimonial-text .quote-icon {
    font-size: 3rem;
    color: var(--brand-blue);
    opacity: 0.5;
}
.testimonial-text blockquote {
    font-size: 1.75rem;
    font-weight: 600;
    line-height: 1.4;
    margin: 1rem 0;
    border-left: 3px solid var(--brand-blue);
    padding-left: 2rem;
}
.testimonial-author {
    margin-top: 1.5rem;
}
.testimonial-author .name {
    font-weight: 700;
    font-size: 1.1rem;
    color: #FFFFFF;
}
.testimonial-author .title {
    color: #a7b3c4;
}
.testimonial-image {
    flex-basis: 45%;
    text-align: center;
}
.testimonial-image img {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}
.testimonial-nav {
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 1rem;
}
.testimonial-nav button {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}
.testimonial-nav button:hover {
    background: var(--brand-blue);
    border-color: var(--brand-blue);
}

/* Customer Logos Grid */
.customer-logos-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 2.5rem 2rem;
    align-items: center;
}
.customer-logos-grid img {
    height: 40px;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.6;
    margin: 0 auto;
    transition: all 0.3s ease;
}
.customer-logos-grid img:hover {
    filter: none;
    opacity: 1;
}

/* YouTube Video Section */
.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    overflow: hidden;
    margin: 0 auto 3rem auto;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    background-color: #000;
}
.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}


/* CTA Section */
.cta-section {
    background-color: var(--brand-blue);
    color: var(--bg-light);
    border-radius: 15px;
    text-align: center;
    padding: 60px 30px;
}
.cta-section h2, .cta-section p {
    color: var(--bg-light);
}
.cta-section .btn {
    background-color: var(--bg-light);
    color: var(--brand-blue);
}

/* Footer */
.main-footer {
    background-color: var(--text-primary);
    padding: 50px 5%;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}
.footer-col h4 {
    margin-bottom: 1.5rem;
    color: var(--bg-light);
}
.footer-col p, .footer-col ul {
    color: var(--text-secondary);
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 0.8rem; }
.footer-col ul a { color: var(--text-secondary); }
.footer-col ul a:hover { color: #ffffff; }
.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}
.social-links a {
    font-size: 1.5rem;
    color: var(--text-secondary);
}
.social-links a:hover {
    color: var(--bg-light);
}

.footer-bottom {
    text-align: center;
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--text-secondary);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Scroll Animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-image-container {
    flex: 1;
    text-align: center;
}
.feature-image-container img {
    max-width: 100%;
    height: auto;
}

@media (max-width: 1024px) {
    .customer-logos-grid { grid-template-columns: repeat(5, 1fr); }
}

@media (max-width: 992px) {
    .testimonial-slide { flex-direction: column; text-align: center; }
    .testimonial-text blockquote { border-left: none; border-top: 3px solid var(--brand-blue); padding-left: 0; padding-top: 2rem; }
    .testimonial-nav { position: static; transform: none; justify-content: center; margin-top: 2rem; }

    .core-feature-section,
    #core-feature-ops .core-feature-section {
        flex-direction: column;
    }

    .other-features-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .customer-logos-grid { grid-template-columns: repeat(4, 1fr); }
    .hero-buttons {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .customer-logos-grid { grid-template-columns: repeat(3, 1fr); }
    .other-features-grid { grid-template-columns: 1fr; }
    #other-features h2::before,
    #other-features h2::after {
        display: none;
    }
    .activity-card {
        flex-direction: column;
        align-items: flex-start;
    }
    .activity-card .activity-card-image-container,
    .activity-card .activity-card-content {
        max-width: 100%;
        flex-basis: auto;
    }
}