/* CSS Variables & Theme Setup */
:root {
    --bg-dark: #070913;
    --bg-card: rgba(18, 24, 46, 0.6);
    --bg-darker: #04050a;
    
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-blue: #00d4ff;
    --accent-purple: #7c3aed;
    --accent-gradient: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    --accent-gradient-hover: linear-gradient(135deg, #26e0ff, #985eff);
    
    --card-border: rgba(255, 255, 255, 0.08);
    --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    
    --font-sans: 'Inter', 'Noto Sans SC', sans-serif;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Basics */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* Layout Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.gap-large {
    gap: 60px;
}

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

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

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

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

.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-5 { margin-bottom: 48px; }
.mt-4 { margin-top: 32px; }

.section-padding {
    padding: 100px 0;
}

.bg-darker {
    background-color: var(--bg-darker);
}

.d-inline-block {
    display: inline-block;
}

/* Typography & Colors */
.text-gradient {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 60px;
}

/* UI Elements */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
    background: var(--accent-gradient-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(124, 58, 237, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(5px);
}

.btn-outline:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    transform: translateY(-2px);
}

.btn-dark {
    background: var(--bg-dark);
    color: var(--text-primary);
}

.btn-dark:hover {
    background: #1a2240;
    transform: translateY(-2px);
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    box-shadow: var(--card-shadow);
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-blue);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 16px;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}

.fade-up {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    transform: translateY(30px);
}

.fade-up.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-normal);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(7, 9, 19, 0.85);
    backdrop-filter: blur(15px);
    padding: 15px 0;
    border-bottom: 1px solid var(--card-border);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-text {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: var(--transition-fast);
}

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

.dropdown {
    position: relative;
}

.arrow-down {
    vertical-align: middle;
    margin-left: 2px;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: -10px;
    background: var(--bg-card);
    backdrop-filter: blur(15px);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 12px 0;
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-fast);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: 8px 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.dropdown-menu li a:hover {
    color: var(--accent-blue);
    background: rgba(255, 255, 255, 0.05);
}

.lang-switch a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
}

.lang-switch a.active {
    color: var(--accent-blue);
}

.menu-toggle {
    display: none;
    cursor: pointer;
}

.menu-toggle .bar {
    display: block;
    width: 25px;
    height: 2px;
    margin: 5px auto;
    background-color: var(--text-primary);
    transition: all 0.3s ease-in-out;
}

/* Hero Section */
.hero {
    position: relative;
    padding: 180px 0 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('hero_background.png');
    background-size: cover;
    background-position: center;
    z-index: -1;
    opacity: 0.4;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: linear-gradient(to top, var(--bg-dark), transparent);
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 90%;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.hero-image-container {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.floating-element {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 15px 25px;
    font-weight: 700;
    font-size: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    animation: float 6s ease-in-out infinite;
}

.el-1 {
    top: 20%;
    left: 10%;
    color: #4ade80;
    animation-delay: 0s;
}

.el-2 {
    bottom: 30%;
    right: 15%;
    color: var(--accent-blue);
    animation-delay: 2s;
}

.el-3 {
    top: 40%;
    right: 5%;
    color: var(--accent-purple);
    font-size: 1.25rem;
    animation-delay: 4s;
    padding: 10px 20px;
}

/* Features */
.feature-card {
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.1);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    background: rgba(0, 212, 255, 0.05);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.feature-title {
    font-size: 1.25rem;
    margin-bottom: 16px;
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Product Section */
.image-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    padding: 10px;
}

.image-wrapper img {
    border-radius: 16px;
    position: relative;
    z-index: 2;
}

.glow-effect {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: var(--accent-blue);
    filter: blur(80px);
    opacity: 0.2;
    z-index: 1;
    border-radius: 50%;
}

.usdt-glow {
    background: var(--accent-purple);
}

.product-desc {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.feature-list {
    margin-top: 24px;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 1.05rem;
    font-weight: 500;
}

.feature-list svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* Solutions */
.solution-card {
    padding: 40px;
}

.solution-icon {
    width: 50px;
    height: 50px;
    margin-bottom: 24px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
}

.solution-icon.purp {
    background: rgba(124, 58, 237, 0.1);
}

.solution-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.solution-desc {
    color: var(--text-secondary);
}

/* CTA Banner & Other Services */
.gradient-bg {
    background: var(--accent-gradient);
    padding: 80px 0;
}

.cta-title {
    font-size: 2.5rem;
    margin-bottom: 32px;
    color: white;
}

.service-box {
    padding: 40px;
    border-top: 1px solid var(--card-border);
    transition: var(--transition-normal);
}

.service-box:hover {
    background: rgba(255, 255, 255, 0.02);
}

.service-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.service-title svg {
    width: 28px;
    height: 28px;
    color: var(--accent-blue);
}

.service-box p {
    color: var(--text-secondary);
    max-width: 80%;
    margin: 0 auto;
}

/* News Section */
.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.news-card {
    display: flex;
    align-items: center;
    padding: 24px 32px;
    position: relative;
    overflow: hidden;
}

.news-card:hover {
    border-color: var(--accent-blue);
    transform: translateX(5px);
}

.news-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: var(--accent-gradient);
    opacity: 0;
    transition: var(--transition-fast);
}

.news-card:hover::before {
    opacity: 1;
}

.news-date {
    font-family: monospace;
    color: var(--accent-blue);
    margin-right: 24px;
    flex-shrink: 0;
}

.news-title {
    font-size: 1.125rem;
    font-weight: 500;
    flex-grow: 1;
}

.news-icon {
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.news-card:hover .news-icon {
    color: var(--accent-blue);
    transform: translateX(5px);
}

/* Footer */
.footer {
    padding: 80px 0 0;
    position: relative;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-cta {
    transform: translateY(-130px);
    margin-bottom: -80px;
    padding: 48px;
    background: linear-gradient(to right, rgba(18, 24, 46, 0.9), rgba(28, 18, 46, 0.9));
}

.footer-main {
    padding-bottom: 60px;
}

.footer-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
}

.footer-heading {
    font-size: 1.125rem;
    margin-bottom: 24px;
    color: #fff;
}

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

.footer-links ul li a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links ul li a:hover {
    color: var(--accent-blue);
    padding-left: 5px;
}

.footer-bottom {
    padding: 24px 0;
    border-top: 1px solid var(--card-border);
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-title { font-size: 3rem; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .news-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .menu-toggle { display: block; }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-card);
        backdrop-filter: blur(20px);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.5);
        padding: 40px 0;
        gap: 20px;
    }
    
    .nav-menu.active { left: 0; }
    
    .menu-toggle.is-active .bar:nth-child(2) { opacity: 0; }
    .menu-toggle.is-active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .menu-toggle.is-active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    .grid-2 { grid-template-columns: 1fr; }
    .reverse-mobile { display: flex; flex-direction: column-reverse; }
    
    .hero-title { font-size: 2.5rem; }
    .hero { padding-top: 120px; }
    .hero-image-container { display: none; }
    
    .footer-main { grid-template-columns: 1fr; gap: 40px; }
    .footer-cta {
        transform: translateY(-50px);
        margin-bottom: 0;
        padding: 30px 20px;
    }
    .footer-cta .text-right { text-align: left; margin-top: 20px; }
}