:root {
    --bg-color: #1a1c20;
    --text-color: #ffffff;
    --accent-color: #3befb7;
    --accent-color-hover: #2ecf9d;
    --secondary-text: rgba(255, 255, 255, 0.6);
    --font-family: MiSans, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    overflow-x: hidden;
    /* Mobile-first default background - simpler for mobile */
    background: radial-gradient(circle at top right, #2c3e50 0%, #1a1c20 60%);
}

.container {
    max-width: 480px; /* Restrict width to look like a mobile app on desktop */
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    padding: 20px;
    position: absolute;
    top: 0;
    left: 50%; /* Center the absolute header relative to viewport */
    transform: translateX(-50%);
    width: 100%;
    max-width: 480px;
    z-index: 10;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center; /* Center logo for mobile style */
    gap: 10px;
}

.logo-icon {
    height: 24px;
}

.logo-text {
    height: 16px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px; /* Space for header */
    position: relative;
    /* Removed the PC specific background image */
}

.hero-container {
    display: flex;
    flex-direction: column; /* Stack vertically by default */
    width: 100%;
    align-items: center;
    text-align: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 40px;
    width: 100%;
}

.hero-title {
    font-size: 36px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 30px;
}

.hero-title .subtitle {
    font-weight: 300;
    display: block;
    margin-top: 10px;
}

.features {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
    justify-content: center;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.feature-item span {
    font-size: 14px;
    font-weight: 500;
    opacity: 0.8;
}

.icon-box {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.05);
}

.icon-box img {
    width: 24px;
    height: 24px;
}

/* Custom CSS Icon for Global Nodes */
.global-nodes-icon {
    position: relative;
}
.node-circle {
    width: 32px;
    height: 32px;
    border: 2px solid #fff;
    border-radius: 50%;
    opacity: 0.2;
}
.node-inner {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--accent-color);
    border-radius: 50%;
    box-shadow: 0 0 0 3px rgba(255,255,255,0.1);
}

.download-buttons {
    width: 100%;
    max-width: 300px;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px 20px;
    border-radius: 38px;
    background: var(--accent-color);
    color: #1a1c20;
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    transition: background 0.3s;
    gap: 10px;
}

.btn:hover {
    background: var(--accent-color-hover);
}

.btn img {
    height: 20px;
    width: auto;
}

.btn-block {
    width: 100%;
}

/* Hero Image */
.hero-image {
    width: 100%;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    position: relative;
    max-width: 100%;
}

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

.floating-tag {
    position: absolute;
    background: #fff;
    color: #000;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 10px;
    font-weight: 700;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.tag-10gbps {
    top: 25%;
    right: 10px;
}

.tag-50m {
    bottom: 25%;
    left: 10px;
}

/* Applications Section */
.applications {
    padding: 60px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    background-image: url('assets/images/mkjv8faj-9ycrld0.png');
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
}

.section-title {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 60px;
}

.section-title .light {
    font-weight: 300;
    margin-left: 10px;
}

.orbit-system {
    position: relative;
    width: 340px; /* Reduced for mobile width */
    height: 340px;
    margin: 0 auto;
}

.center-logo {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}
.center-logo img {
    width: 30px;
}

.orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid rgba(59, 239, 183, 0.1);
    border-radius: 50%;
}

.orbit-1 { width: 120px; height: 120px; }
.orbit-2 { width: 220px; height: 220px; }
.orbit-3 { width: 320px; height: 320px; }

.app-icon {
    position: absolute;
    background: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    width: 40px;
    height: 40px;
    padding: 10px;
}

.app-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Specific styling for app icons */
/* Orbit 1 */
.icon-chatgpt { top: 20%; left: 60%; background: #fff; }
.icon-x { top: 65%; left: 25%; background: #3a3c3f; padding: 10px; }
.icon-facebook { top: 70%; left: 75%; background: #365fee; padding: 10px; }

/* Orbit 2 */
.icon-pinterest { top: 10%; right: 15%; background: #d33333; }
.icon-behance { bottom: 5%; right: 25%; background: #365fee; }

/* Orbit 3 */
.icon-dribbble { top: 35%; left: -10px; background: #ef76da; }
.icon-youtube { bottom: 15%; left: 5%; background: #f05151; }

/* PC Adaptive Enhancement */
/* When screen is large enough, we can make it look nicer while keeping the mobile layout */
@media (min-width: 768px) {
    body {
        /* Add a subtle pattern or gradient for the unused space on PC */
        background-color: #0f1114;
        background-image: linear-gradient(to bottom, #0f1114, #1a1c20);
    }
    
    .container {
        /* Add a shadow or border to the "phone" container on PC */
        box-shadow: 0 0 50px rgba(0,0,0,0.5);
        background-color: #1a1c20; /* The actual app background */
        min-height: 100vh;
    }

    .header {
        /* Ensure header stays inside the container visually */
        left: 50%;
        transform: translateX(-50%);
    }
}