/* Security Check */
.security-check { background: transparent; border-top: 2px solid transparent; border-image: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan), var(--accent-pink)) 1; box-shadow: 0 -2px 16px rgba(0,255,209,0.12); padding: 60px 0; }
.security-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; max-width: 1100px; margin: 0 auto; }
.sec-card { background: linear-gradient(135deg, var(--card-gradient-start), var(--card-gradient-end)); border: 1px solid rgba(124,92,255,0.2); border-radius: 16px; padding: 20px; text-align: center; }
.sec-title { color: var(--text-secondary); font-weight: 700; margin-bottom: 6px; }
.sec-value { font-weight: 900; color: var(--text-primary); }
.sec-value.good { color: var(--status-good); text-shadow: 0 0 8px var(--status-good); }
.sec-value.warn { color: var(--badge-warning); text-shadow: 0 0 8px var(--badge-warning); }
.sec-value.bad { color: #ff6b6b; text-shadow: 0 0 8px #ff6b6b; }
.sec-actions { text-align: center; margin-top: 20px; }
.region-block { display:none; }
.region-block.active { display:block; }
/* Reset và Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --bg-primary: #0b0f1a;
    --bg-secondary: #0f1f3a;
    --card-gradient-start: #121a36;
    --card-gradient-end: #0d142b;
    --glass-bg: rgba(17, 25, 54, 0.65);
    --text-primary: #e8ecff;
    --text-secondary: #a7b0c9;
    --accent-purple: #7c5cff;
    --accent-cyan: #00ffd1;
    --accent-pink: #ff6bd6;
    --badge-warning: #ffb703;
    --status-good: #00ffd1;
    --status-medium: #ffb703;
    --status-bad: #ff6b6b;
    
    /* Gradients */
    --conic-gradient: conic-gradient(from 0deg, var(--accent-purple), var(--accent-cyan), var(--accent-pink), var(--accent-purple));
    --radial-gradient: radial-gradient(circle at 30% 20%, rgba(124, 92, 255, 0.3) 0%, transparent 50%),
                      radial-gradient(circle at 70% 80%, rgba(0, 255, 209, 0.2) 0%, transparent 50%),
                      radial-gradient(circle at 50% 50%, rgba(255, 107, 214, 0.1) 0%, transparent 70%);
    
    /* Shadows */
    --glow-purple: 0 0 20px rgba(124, 92, 255, 0.5);
    --glow-cyan: 0 0 20px rgba(0, 255, 209, 0.5);
    --glow-pink: 0 0 20px rgba(255, 107, 214, 0.5);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    /* Typography */
    --font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Microsoft YaHei", Arial, sans-serif;
}

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

/* Mobile scrolling improvements */
html { scroll-behavior: smooth; }
@media (max-width: 768px) {
    /* Trên iOS, tắt smooth scroll để tránh khựng */
    html { scroll-behavior: auto; }
    body { -webkit-overflow-scrolling: touch; }
    .container, .pricing, .features, .certifications, .contact { -webkit-overflow-scrolling: touch; }
}
* { -webkit-tap-highlight-color: transparent; }

/* iOS Safari specific smoothness tweaks */
@supports (-webkit-touch-callout: none) {
    html, body { overscroll-behavior-y: none; }
    .modal-content { -webkit-overflow-scrolling: touch; overscroll-behavior: contain; transform: translateZ(0); }
}

/* Cho phép cuộn native mượt hơn */
body, .container, .pricing, .features, .certifications, .contact { touch-action: pan-y; }
/* tránh chặn cuộn do phần tử con */
.hero, .features, .pricing, .certifications, .contact { overscroll-behavior: contain; }

/* Reduce GPU/paint cost on mobile */
@media (max-width: 768px) {
    .particle { display: block; }
    /* Globe animations removed */
    .modal-content { max-height: 88vh; overflow-y: auto; -webkit-overflow-scrolling: touch; }
    body.modal-open { overflow: hidden; }
    /* Giữ nền giống desktop */
    .grid-pattern { animation: gridMove 20s linear infinite; opacity: 1; }
    .pricing-card, .feature-card, .server-stat, .contact-card, .navbar, .back-to-top { box-shadow: none; }
    .data-amount, .price-amount { text-shadow: none; }
    .btn-primary { box-shadow: none; }
    .icon-bg { animation: none; }
}

/* Background Effects */
.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: var(--bg-primary);
}

.noise {
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: .06;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><filter id="n"><feTurbulence type="fractalNoise" baseFrequency="0.9" numOctaves="2" stitchTiles="stitch"/></filter><rect width="100%" height="100%" filter="url(%23n)" opacity="0.5"/></svg>');
}

.aurora {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(60% 80% at 20% 10%, rgba(124,92,255,0.35), transparent 60%),
                radial-gradient(80% 60% at 80% 80%, rgba(0,255,209,0.25), transparent 60%),
                radial-gradient(70% 70% at 50% 50%, rgba(255,107,214,0.18), transparent 65%);
    mix-blend-mode: screen;
    filter: blur(30px);
    opacity: .9;
    animation: auroraMove 20s ease-in-out infinite alternate;
}

@keyframes auroraMove {
    0% { transform: translate3d(0,0,0) scale(1); }
    100% { transform: translate3d(0,-20px,0) scale(1.05); }
}

.grid-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle, rgba(124, 92, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.radial-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--radial-gradient);
    opacity: 0.6;
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--accent-cyan);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
    box-shadow: 0 0 6px var(--accent-cyan);
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); opacity: 0; }
    50% { transform: translateY(-20px) rotate(180deg); opacity: 1; }
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--glass-bg);
    /* backdrop-filter removed for iOS smoothness */
    /* backdrop-filter: blur(20px); */
    border-bottom: 1px solid rgba(124, 92, 255, 0.2);
    box-shadow: var(--glass-shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.nav-logo .logo-icon {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: bold;
    color: var(--text-primary);
    background: var(--conic-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-logo .logo-icon::after {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    margin-left: 8px;
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-cyan), 0 0 18px var(--accent-purple);
    background: radial-gradient(circle, var(--accent-cyan) 0%, var(--accent-purple) 70%);
    animation: pulseDot 2.2s ease-in-out infinite;
}

@keyframes pulseDot {
    0%,100% { transform: scale(1); opacity: .9; }
    50% { transform: scale(1.3); opacity: 1; }
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

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

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

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

.nav-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    align-items: flex-end;
}

.ip-display, .location-display {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
}

.ip-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.ip-address {
    color: var(--accent-cyan);
    font-family: monospace;
    font-weight: 600;
}

.location-icon {
    font-size: 14px;
}

.location-text {
    color: var(--text-primary);
    font-weight: 500;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-outline {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    color: white;
    box-shadow: var(--glow-purple);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--text-secondary);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--accent-cyan);
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}


/* Hero Section */
.hero {
    padding: 100px 0 60px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Hero badge styles removed - no longer used */

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    background: radial-gradient(120% 120% at 0% 0%, rgba(124,92,255,.35), transparent 40%),
                radial-gradient(120% 120% at 100% 100%, rgba(0,255,209,.25), transparent 50%),
                var(--conic-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.6;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}


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

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent-cyan);
    display: block;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Trust indicators removed */

.hero-actions {
    display: flex;
    gap: 20px;
    align-items: center;
    justify-content: center;
    flex-wrap: nowrap;
    margin-bottom: 32px;
}

.speed-test-container {
    max-width: 500px;
    margin: 0 auto;
    background: linear-gradient(135deg, rgba(124, 92, 255, 0.1), rgba(0, 255, 209, 0.1));
    border: 1px solid rgba(124, 92, 255, 0.2);
    border-radius: 12px;
    padding: 16px;
    backdrop-filter: blur(10px);
}

.speed-test-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.speed-test-title {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.speed-icon {
    font-size: 16px;
    color: var(--accent-cyan);
}

.speed-value {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent-cyan);
    font-family: monospace;
}

.speed-unit {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-left: 4px;
}

.speed-test-bar {
    position: relative;
    height: 8px;
    background: rgba(124, 92, 255, 0.2);
    border-radius: 4px;
    overflow: hidden;
}

.speed-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
    border-radius: 4px;
    width: 0%;
    transition: width 0.1s ease;
    position: relative;
}

.speed-progress::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 20px;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3));
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-20px); }
    100% { transform: translateX(20px); }
}

.speed-indicators {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
}

.speed-indicator {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.stats-grid {
    display: flex;
    gap: 12px;
    max-width: 600px;
    margin: 24px auto 0;
    flex-wrap: wrap;
    justify-content: center;
}

.stat-card {
    background: linear-gradient(135deg, rgba(124, 92, 255, 0.1), rgba(0, 255, 209, 0.1));
    border: 1px solid rgba(124, 92, 255, 0.2);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    min-height: 60px;
    flex: 1;
    min-width: 140px;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-purple);
    box-shadow: 0 8px 25px rgba(124, 92, 255, 0.2);
}

.stat-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    border-radius: 12px;
    color: white;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.stat-content {
    flex: 1;
}

.stat-title {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 4px;
}

.stat-value {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--accent-cyan);
    font-family: monospace;
    transition: all 0.3s ease;
}

.stat-value.updating {
    color: var(--accent-purple);
    transform: scale(1.05);
}

.stat-value.good {
    color: var(--status-good);
}

.hero-actions .btn-primary {
    position: relative;
}
.hero-actions .btn-primary::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 12px;
    padding: 1px;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
            mask-composite: exclude;
}

/* Hero Visual */
.hero-visual { display: none; }

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

.globe {
    width: 300px;
    height: 300px;
    border: 2px solid var(--accent-cyan);
    border-radius: 50%;
    position: relative;
    animation: rotate 20s linear infinite;
    box-shadow: var(--glow-cyan);
}

.globe-inner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 250px;
    height: 250px;
    border: 1px solid var(--accent-purple);
    border-radius: 50%;
    animation: rotate 15s linear infinite reverse;
}

.connection-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}


.connection-lines::after {
    transform: translate(-50%, -50%) rotate(90deg);
    animation: lineRotate 4s linear infinite 2s;
}

@keyframes lineRotate {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.server-nodes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.server-nodes::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
    box-shadow: 0 0 15px var(--accent-cyan);
    animation: nodePulse 2s ease-in-out infinite;
    bottom: 20%;
    right: 20%;
    animation-delay: 1s;
}

@keyframes nodePulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.5); opacity: 0.7; }
}

.floating-cards {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.floating-card {
    position: absolute;
    background: var(--glass-bg);
    /* backdrop-filter: blur(20px); */
    border: 1px solid rgba(124, 92, 255, 0.3);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--glass-shadow);
    animation: floatCard 6s ease-in-out infinite;
}

.card-1 {
    top: 10%;
    right: 10%;
    animation-delay: 0s;
}

.card-2 {
    bottom: 20%;
    left: 5%;
    animation-delay: 2s;
}

.card-3 {
    top: 50%;
    right: 5%;
    animation-delay: 4s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

.card-icon {
    font-size: 24px;
}

.card-text {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Sections */
section {
    padding: 80px 0;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--conic-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features {
    /* Hiển thị nền chung xuyên suốt */
    background: transparent;
    /* Đường kẻ neon ngăn cách */
    border-top: 2px solid transparent;
    border-image: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan), var(--accent-pink)) 1;
    box-shadow: 0 -2px 16px rgba(0, 255, 209, 0.15);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.feature-card {
    background: linear-gradient(135deg, var(--card-gradient-start), var(--card-gradient-end));
    border: 1px solid rgba(124, 92, 255, 0.2);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.feature-icon {
    position: relative;
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}

.icon-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--conic-gradient);
    border-radius: 50%;
    opacity: 0.1;
    animation: rotate 10s linear infinite;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.feature-badge {
    display: inline-block;
    background: var(--accent-cyan);
    color: var(--bg-primary);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: bold;
}

/* Pricing Section */
.pricing {
    /* Hiển thị nền chung xuyên suốt */
    background: transparent;
    /* Đường kẻ neon ngăn cách */
    border-top: 2px solid transparent;
    border-image: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan), var(--accent-pink)) 1;
    box-shadow: 0 -2px 16px rgba(124, 92, 255, 0.15);
}

/* Remove any decorative pseudo-elements (dots/markers) in pricing area */
.pricing .pricing-card::before,
.pricing .pricing-card::after,
.pricing .region-title::before,
.pricing .region-title::after {
    display: none !important;
    content: none !important;
}

/* Region Tabs */
.region-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin: 20px auto 28px;
    flex-wrap: wrap;
}

.region-tab {
    background: rgba(17, 25, 54, 0.65);
    border: 1px solid rgba(124, 92, 255, 0.25);
    color: var(--text-primary);
    padding: 12px 18px;
    border-radius: 14px;
    cursor: pointer;
    font-weight: 700;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 180px;
}

.region-tab.active {
    border-color: transparent;
    background: linear-gradient(135deg, var(--card-gradient-start), var(--card-gradient-end));
    box-shadow: 0 0 18px rgba(0, 255, 209, 0.25);
    outline: 2px solid transparent;
    outline-offset: 0;
}

.tab-title { font-size: 1.1rem; }
.tab-sub { font-size: 0.85rem; color: var(--text-secondary); font-weight: 600; }

/* Toggle regions: each region container is a pricing-grid */
.region { display: none; }
.region.active { display: grid; }

@media (max-width: 768px) {
    .region-tabs { gap: 10px; margin: 16px auto 22px; }
    .region-tab { padding: 8px 12px; border-radius: 10px; font-weight: 600; }
}

.sale-banner {
    background: linear-gradient(135deg, var(--accent-pink), #ff1744);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 40px;
    text-align: center;
    box-shadow: 0 0 30px rgba(255, 107, 214, 0.3);
}

.sale-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.sale-icon {
    font-size: 24px;
}

.sale-text {
    color: white;
    font-weight: bold;
    font-size: 1.1rem;
}

.sale-timer {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 0.9rem;
    /* backdrop-filter: blur(10px); */
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
    align-items: stretch;
}

.pricing-card {
    background: linear-gradient(135deg, var(--card-gradient-start), var(--card-gradient-end));
    border: 1px solid rgba(124, 92, 255, 0.2);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.pricing-card.featured {
    border-color: var(--accent-cyan);
    box-shadow: var(--glow-cyan);
}


.plan-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-cyan);
    color: var(--bg-primary);
    padding: 6px 16px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: bold;
}

.plan-recommended { position: absolute; top: -14px; right: 12px; background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan)); color:#0b0f1a; padding: 6px 10px; border-radius: 12px; font-size: 11px; font-weight: 900; box-shadow: 0 0 16px rgba(0,255,209,.35); }
.mini-badge { display:inline-block; margin-left: 8px; background: rgba(0,255,209,.15); color: var(--accent-cyan); border:1px solid rgba(0,255,209,.35); padding: 2px 8px; border-radius: 10px; font-size: 10px; font-weight: 800; vertical-align: middle; }

/* Tooltip */
.has-tip { position: relative; cursor: help; }
.has-tip .tip { position: absolute; bottom: 110%; left: 50%; transform: translateX(-50%); background: rgba(13,20,43,.95); color: var(--text-primary); border:1px solid rgba(124,92,255,.35); padding: 8px 10px; border-radius: 10px; font-size: 12px; font-weight: 600; white-space: nowrap; pointer-events: none; opacity: 0; visibility: hidden; transition: opacity .15s ease, transform .15s ease; box-shadow: 0 8px 16px rgba(0,0,0,.35); }
.has-tip:hover .tip { opacity:1; visibility: visible; transform: translate(-50%, -4px); }

.plan-header {
    margin-bottom: 20px;
    flex-shrink: 0;
}

.plan-name {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.plan-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}

.price-old {
    font-size: 1rem;
    color: var(--text-secondary);
    text-decoration: line-through;
    opacity: 0.7;
}

.price-amount {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-cyan);
}

.price-period {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.price-save {
    background: var(--accent-pink);
    color: white;
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: bold;
    margin-top: 8px;
    display: inline-block;
    box-shadow: 0 2px 8px rgba(255, 107, 214, 0.3);
}

/* Data Highlight Section */
.data-highlight {
    background: linear-gradient(135deg, rgba(0, 255, 209, 0.1), rgba(124, 92, 255, 0.1));
    border: 2px solid var(--accent-cyan);
    border-radius: 16px;
    padding: 20px;
    margin: 20px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(0, 255, 209, 0.2);
    flex-shrink: 0;
}

.data-highlight.featured {
    background: linear-gradient(135deg, rgba(0, 255, 209, 0.2), rgba(124, 92, 255, 0.2));
    border-color: var(--accent-cyan);
    box-shadow: 0 0 30px rgba(0, 255, 209, 0.3);
}

.data-icon {
    font-size: 32px;
    margin-bottom: 8px;
    filter: drop-shadow(0 0 10px currentColor);
}

.data-amount {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--accent-cyan);
    margin-bottom: 4px;
    text-shadow: 0 0 20px var(--accent-cyan);
    line-height: 1;
}

.data-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}

.data-badge {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
    display: inline-block;
    margin-top: 8px;
    box-shadow: 0 2px 8px rgba(0, 255, 209, 0.3);
}

.plan-features {
    margin-bottom: 24px;
    flex: 1;
}

.feature-item {
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.plan-button {
    width: 100%;
    padding: 12px;
    background: transparent;
    border: 2px solid var(--accent-purple);
    border-radius: 10px;
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    font-size: 0.9rem;
    margin-top: auto;
}

.plan-button.featured {
    background: var(--accent-cyan);
    border-color: var(--accent-cyan);
    color: var(--bg-primary);
}

/* Security Certifications */
.certifications {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(0, 255, 209, 0.05), rgba(124, 92, 255, 0.05));
    border-top: 2px solid transparent;
    border-image: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan), var(--accent-pink)) 1;
    box-shadow: 0 -2px 16px rgba(0, 255, 209, 0.13);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.cert-card {
    background: linear-gradient(135deg, var(--card-gradient-start), var(--card-gradient-end));
    border: 1px solid rgba(0, 255, 209, 0.2);
    border-radius: 20px;
    padding: 32px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cert-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
}

.cert-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 255, 209, 0.3);
}

.cert-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
    text-align: center;
}

.cert-content h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
}

.cert-content p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
    text-align: center;
}

.cert-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(124, 92, 255, 0.3);
    margin: 0 auto;
    display: block;
    width: fit-content;
}

/* Contact Section */
.contact {
    background: transparent;
    padding: 80px 0;
    border-top: 2px solid transparent;
    border-image: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan), var(--accent-pink)) 1;
    box-shadow: 0 -2px 16px rgba(124, 92, 255, 0.12);
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.contact-card {
    background: linear-gradient(135deg, var(--card-gradient-start), var(--card-gradient-end));
    border: 1px solid rgba(124, 92, 255, 0.2);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 16px;
}

.contact-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
}

.contact-icon.wechat {
    background: #07c160;
}

.contact-icon.telegram {
    background: #0088cc;
}

.contact-icon.zalo {
    background: #0068ff;
}

.contact-icon.whatsapp {
    background: #25d366;
}

.icon-circle {
    font-size: 24px;
    color: white;
}

.contact-info {
    flex: 1;
}

.contact-app {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.contact-detail {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.contact-value {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    font-family: monospace;
}

.contact-btn {
    width: 100%;
    padding: 12px 16px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: white;
    font-size: 0.9rem;
}

.contact-btn.wechat-btn {
    background: #07c160;
}

.contact-btn.telegram-btn {
    background: #0088cc;
}

.contact-btn.zalo-btn {
    background: #0068ff;
}

.contact-btn.whatsapp-btn {
    background: #25d366;
}

.copy-icon {
    font-size: 16px;
}

/* CTA Section */
.cta {
    background: transparent;
    text-align: center;
    border-top: 2px solid transparent;
    border-image: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan), var(--accent-pink)) 1;
    box-shadow: 0 -2px 16px rgba(255, 107, 214, 0.12);
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--conic-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.cta-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.cta-guarantee {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex-wrap: wrap;
    justify-content: center;
}

.guarantee-icon {
    font-size: 16px;
}

/* Footer */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid rgba(124, 92, 255, 0.2);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    margin-bottom: 20px;
}

.footer-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.footer-column h4 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: var(--accent-cyan);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(124, 92, 255, 0.1);
    color: var(--text-secondary);
}


/* Responsive Design */

/* Large Desktop (1200px+) */
@media (min-width: 1200px) {
    .container {
        max-width: 1200px;
    }
    
    .hero-container {
        max-width: 900px;
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .hero-description {
        font-size: 1.3rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 32px;
    }
    
    .pricing-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 32px;
    }
    
    .stats-grid {
        max-width: 800px;
        gap: 20px;
    }
    
    .stat-card {
        padding: 20px;
        min-height: 70px;
    }
    
    .stat-icon {
        width: 48px;
        height: 48px;
    }
    
    .stat-icon svg {
        width: 28px;
        height: 28px;
    }
    
    .stat-title {
        font-size: 1rem;
    }
    
    .stat-value {
        font-size: 1.6rem;
    }
}

/* Desktop (1024px - 1199px) */
@media (min-width: 1024px) and (max-width: 1199px) {
    .container {
        max-width: 1000px;
    }
    
    .hero-container {
        max-width: 800px;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 28px;
    }
    
    .pricing-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 28px;
    }
    
    .stats-grid {
        max-width: 700px;
        gap: 16px;
    }
}

/* Laptop (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
    .container {
        max-width: 900px;
    }
    
    .hero-container {
        max-width: 700px;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-description {
        font-size: 1.2rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    
    .stats-grid {
        max-width: 600px;
        gap: 14px;
    }
    
    .stat-card {
        padding: 18px;
        min-height: 65px;
    }
    
    .stat-icon {
        width: 44px;
        height: 44px;
    }
    
    .stat-icon svg {
        width: 26px;
        height: 26px;
    }
    
    .stat-title {
        font-size: 0.95rem;
    }
    
    .stat-value {
        font-size: 1.3rem;
    }
}

/* Tablet Portrait (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) and (orientation: portrait) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .stats-grid {
        flex-direction: row;
        flex-wrap: wrap;
        max-width: 500px;
    }
    
    .stat-card {
        flex: 1;
        min-width: 45%;
        margin-bottom: 12px;
    }
}

/* Mobile Landscape (481px - 767px) */
@media (min-width: 481px) and (max-width: 767px) {
    .container {
        max-width: 100%;
        padding: 0 20px;
    }
    
    .hero-container {
        max-width: 100%;
        padding: 0 20px;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .stats-grid {
        flex-direction: row;
        flex-wrap: wrap;
        max-width: 500px;
        gap: 12px;
    }
    
    .stat-card {
        flex: 1;
        min-width: 45%;
        padding: 16px;
        min-height: 60px;
    }
    
    .stat-icon {
        width: 40px;
        height: 40px;
    }
    
    .stat-icon svg {
        width: 24px;
        height: 24px;
    }
    
    .stat-title {
        font-size: 0.9rem;
    }
    
    .stat-value {
        font-size: 1.2rem;
    }
}

/* Mobile Portrait (max-width: 480px) */
@media (max-width: 480px) {
    .nav-menu {
        display: none;
    }
    
    .container {
        max-width: 100%;
        padding: 0 16px;
    }
    
    .hero-container {
        max-width: 100%;
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 2rem;
        max-width: 100%;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 12px;
    }
    
    .speed-test-container {
        margin: 0 16px;
        padding: 14px;
        max-width: 100%;
    }
    
    .speed-value {
        font-size: 1.2rem;
    }
    
    .speed-test-title {
        font-size: 0.75rem;
    }
    
    .stats-grid {
        flex-direction: column;
        gap: 8px;
        margin: 20px auto 0;
        max-width: 100%;
    }
    
    .stat-card {
        padding: 12px;
        min-height: 50px;
        min-width: auto;
    }
    
    .stat-icon {
        width: 32px;
        height: 32px;
    }
    
    .stat-icon svg {
        width: 18px;
        height: 18px;
    }
    
    .stat-value {
        font-size: 1.1rem;
    }
    
    .stat-title {
        font-size: 0.75rem;
    }
    
    .hero-stats {
        justify-content: center;
        gap: 20px;
    }
    
    
    .hero-actions {
        flex-direction: column;
        gap: 12px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .feature-card {
        padding: 20px;
    }
    
    .feature-card h3 {
        font-size: 1.1rem;
    }
    
    .feature-card p {
        font-size: 0.9rem;
    }
    
    
    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    
    .pricing-card {
        padding: 20px;
        height: auto;
        min-height: 400px;
    }
    
    .data-highlight {
        padding: 16px;
        margin: 16px 0;
    }
    
    .data-amount {
        font-size: 2rem;
    }
    
    .data-icon {
        font-size: 28px;
    }
    
    .sale-banner {
        padding: 16px;
        margin-bottom: 30px;
    }
    
    .sale-content {
        flex-direction: column;
        gap: 12px;
    }
    
    .sale-text {
        font-size: 1rem;
    }
    
    
    .server-stats {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .server-stat {
        padding: 16px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .cta-actions {
        flex-direction: column;
        gap: 20px;
    }
    
    .cta-guarantee {
        flex-direction: column;
        gap: 8px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 1.8rem;
        max-width: 100%;
    }
    
    .hero-description {
        max-width: 100%;
    }
    
    /* Trust indicators small mobile styles removed */
    
    .speed-test-container {
        padding: 14px;
        margin: 0 8px;
    }
    
    .speed-value {
        font-size: 1.1rem;
    }
    
    .speed-indicators {
        gap: 4px;
    }
    
    .speed-indicator {
        font-size: 0.6rem;
    }
    
    .stats-grid {
        gap: 8px;
        margin: 20px auto 0;
        max-width: 400px;
        flex-direction: column;
    }
    
    .stat-card {
        padding: 12px;
        min-height: 50px;
        min-width: auto;
    }
    
    .stat-icon {
        font-size: 18px;
        width: 32px;
        height: 32px;
    }
    
    .stat-value {
        font-size: 1.1rem;
    }
    
    .stat-title {
        font-size: 0.75rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    /* Hero badge styles removed */
    
    .badge-hot,
    .badge-sale {
        font-size: 11px;
        padding: 4px 8px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }
    
    .stat-item {
        text-align: center;
    }
    
    .features-grid {
        gap: 16px;
    }
    
    .feature-card {
        padding: 20px;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 24px;
    }
    
    .pricing-card {
        padding: 16px;
        height: auto;
        min-height: 450px;
    }
    
    .plan-name {
        font-size: 1.2rem;
    }
    
    .price-amount {
        font-size: 1.8rem;
    }
    
    .data-highlight {
        padding: 12px;
        margin: 12px 0;
    }
    
    .data-amount {
        font-size: 1.8rem;
    }
    
    .data-icon {
        font-size: 24px;
    }
    
    .data-badge {
        font-size: 0.7rem;
        padding: 4px 8px;
    }
    
    .sale-banner {
        padding: 12px;
    }
    
    .sale-text {
        font-size: 0.9rem;
    }
    
    .sale-timer {
        font-size: 0.8rem;
        padding: 6px 12px;
    }
    
    
    .server-stats {
        gap: 12px;
    }
    
    .server-stat {
        padding: 12px;
        gap: 12px;
    }
    
    .stat-icon {
        font-size: 24px;
    }
    
    .stat-number {
        font-size: 1.4rem;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .contact-cards {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .contact-card {
        padding: 20px;
    }
    
    .contact-icon {
        width: 50px;
        height: 50px;
    }
    
    .icon-circle {
        font-size: 20px;
    }
    
    .btn-primary,
    .btn-secondary,
    .btn-outline {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .btn-large {
        padding: 14px 28px;
        font-size: 16px;
    }
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--glow-purple);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(124, 92, 255, 0.4);
}

/* Touch Optimizations for Tablets */
@media (min-width: 481px) and (max-width: 1023px) {
    .btn-primary, .btn-outline, .btn-secondary {
        min-height: 48px;
        padding: 12px 24px;
    }
    
    .feature-card, .pricing-card, .stat-card {
        cursor: pointer;
        transition: transform 0.2s ease;
    }
    
    .feature-card:hover, .pricing-card:hover, .stat-card:hover {
        transform: translateY(-2px);
    }
    
    .modal-content {
        max-width: 90vw;
        max-height: 90vh;
    }
    
    .service-card {
        min-height: 60px;
        padding: 16px;
    }
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}