/* Reset & Base */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
    font-family: 'Impact', 'Arial Black', 'Microsoft YaHei', sans-serif; 
    /* Acid Graphic Background */
    background-color: #050505; 
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(204, 255, 0, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(255, 0, 255, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(0, 255, 255, 0.1) 0%, transparent 50%);
    color: #e0e0e0; 
    line-height: 1.6; 
    min-height: 100vh; 
    overflow-x: hidden; 
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* Theme Variables - Acid Graphic */
:root {
    --acid-green: #ccff00;
    --acid-pink: #ff00ff;
    --acid-cyan: #00ffff;
    --chrome-light: #ffffff;
    --chrome-mid: #a0a0a0;
    --chrome-dark: #333333;
    --bg-dark: #0a0a0a;
    --bg-glass: rgba(15, 15, 15, 0.7);
}

/* Typography - Chrome & Gothic Effects */
.chrome-text {
    background: linear-gradient(to bottom, #ffffff 0%, #b3b3b3 40%, #222222 50%, #666666 60%, #ffffff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-transform: uppercase;
    letter-spacing: -1px;
    filter: drop-shadow(0 0 10px rgba(255,255,255,0.2));
}
.acid-text {
    color: var(--acid-green);
    text-shadow: 0 0 10px var(--acid-green), 2px 2px 0px var(--acid-pink);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Navigation */
.navbar { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding: 15px 5%; 
    background: var(--bg-glass); 
    backdrop-filter: blur(2px);
    position: sticky; 
    top: 0; 
    z-index: 100; 
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.nav-logo { 
    font-size: 28px; 
    font-weight: 900; 
    display: flex;
    align-items: center;
    gap: 12px;
    transform: skewX(-10deg);
}
.nav-logo svg {
    width: 36px;
    height: 36px;
    fill: url(#chrome-grad);
    filter: drop-shadow(0 0 5px var(--acid-cyan));
}
.nav-links { display: flex; gap: 30px; align-items: center; font-weight: bold; text-transform: uppercase;}
.nav-links a { 
    color: #aaa; 
    transition: all 0.3s; 
    font-size: 14px; 
    letter-spacing: 1px;
}
.nav-links a:hover { 
    color: var(--acid-green); 
    text-shadow: 0 0 8px var(--acid-green);
}

.btn-download-nav { 
    padding: 8px 24px !important; 
    background: linear-gradient(45deg, var(--acid-green), var(--acid-cyan));
    color: #000 !important; 
    border-radius: 50px;
    font-weight: 900;
    transition: all 0.3s; 
    box-shadow: 0 0 15px rgba(204, 255, 0, 0.4);
    transform: skewX(-10deg);
}
.btn-download-nav:hover { 
    background: linear-gradient(45deg, var(--acid-pink), var(--acid-cyan));
    box-shadow: 0 0 25px rgba(255, 0, 255, 0.6);
    color: #fff !important;
}

/* Hero Section - Acid Graphic */
.hero-wrapper {
    position: relative;
    min-height: 95vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 60px 5% 100px;
    overflow: hidden;
}

/* Fluid Gradient Orbs */
.fluid-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(2px);
    z-index: 0;
    opacity: 0.5;
    animation: orbFloat 15s infinite alternate ease-in-out;
}
.orb-1 { top: 10%; left: 10%; width: 300px; height: 300px; background: var(--acid-pink); }
.orb-2 { bottom: 20%; right: 10%; width: 400px; height: 400px; background: var(--acid-cyan); animation-delay: -5s; }
.orb-3 { top: 40%; left: 40%; width: 250px; height: 250px; background: var(--acid-green); animation-delay: -10s; }

@keyframes orbFloat {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 50px) scale(1.2); }
}

/* Liquid Metal Plane SVG */
.hero-plane-svg {
    position: absolute;
    top: 45%; left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    z-index: 1;
    filter: drop-shadow(0 20px 30px rgba(0,0,0,0.8));
    animation: liquidFloat 4s ease-in-out infinite alternate;
}
.hero-plane-svg polygon {
    fill: url(#liquid-chrome);
    stroke: var(--acid-cyan);
    stroke-width: 1;
}
.hero-plane-svg .plane-shadow {
    fill: url(#liquid-dark);
}

@keyframes liquidFloat {
    0% { transform: translate(-50%, -48%) rotate(-2deg) scale(1); filter: drop-shadow(0 20px 30px rgba(0,255,255,0.2));}
    100% { transform: translate(-50%, -52%) rotate(2deg) scale(1.02); filter: drop-shadow(0 30px 40px rgba(204,255,0,0.3));}
}

.hero-content { 
    z-index: 20; 
    max-width: 900px; 
    text-align: center;
    position: relative;
    margin-top: 40px;
    background: rgba(10, 10, 10, 0.6);
    padding: 50px;
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.1);
    backdrop-filter: blur(2px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.8), inset 0 0 20px rgba(255,255,255,0.05);
}

.hero-title {
    font-size: 52px; 
    font-weight: 900;
    margin-bottom: 20px;
    line-height: 1.2;
    transform: skewX(-5deg);
}

.hero p { 
    font-size: 18px; 
    margin-bottom: 40px; 
    color: #ccc;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-family: 'Arial', sans-serif;
    letter-spacing: 1px;
}

.hero-buttons { display: flex; gap: 20px; justify-content: center; margin-bottom: 50px; flex-wrap: wrap; }

.btn-primary { 
    padding: 16px 40px; 
    font-size: 18px; 
    font-weight: 900; 
    color: #000; 
    background: var(--acid-green);
    border: none;
    border-radius: 50px;
    box-shadow: 0 0 20px rgba(204, 255, 0, 0.5);
    transition: all 0.3s;
    text-transform: uppercase;
    transform: skewX(-10deg);
}
.btn-primary:hover { 
    transform: skewX(-10deg) translateY(-3px);
    background: #fff;
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.8);
}

.btn-outline { 
    padding: 16px 40px; 
    font-size: 18px; 
    font-weight: 900; 
    color: var(--acid-cyan); 
    background: transparent;
    border: 2px solid var(--acid-cyan);
    border-radius: 50px;
    box-shadow: inset 0 0 10px rgba(0, 255, 255, 0.2), 0 0 10px rgba(0, 255, 255, 0.2);
    transition: all 0.3s;
    text-transform: uppercase;
    transform: skewX(-10deg);
}
.btn-outline:hover { 
    transform: skewX(-10deg) translateY(-3px);
    background: var(--acid-cyan);
    color: #000;
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.6);
}

.hero-images { 
    display: flex; 
    justify-content: center; 
    gap: 25px; 
    align-items: flex-end; 
    margin-top: 20px;
    z-index: 20;
}
.hero-images img { 
    max-width: 28%; 
    border-radius: 12px;
    border: 2px solid rgba(255,255,255,0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
    transition: all 0.4s ease; 
    /* Acid metallic reflection effect */
    filter: contrast(1.2) saturate(1.5) drop-shadow(0 0 10px rgba(255,0,255,0.3));
}
.hero-images img:nth-child(2) {
    transform: translateY(-20px);
    z-index: 2;
    filter: contrast(1.2) saturate(1.5) drop-shadow(0 0 15px rgba(0,255,255,0.4));
}
.hero-images img:hover { 
    transform: translateY(-30px) scale(1.05); 
    filter: contrast(1.3) saturate(2) drop-shadow(0 0 20px rgba(204,255,0,0.6));
}

/* Features Section */
.features { padding: 100px 5%; background: #080808; position: relative; z-index: 10; border-top: 1px solid rgba(255,255,255,0.05);}
.section-title { 
    text-align: center; 
    font-size: 42px; 
    margin-bottom: 60px; 
    font-weight: 900;
    transform: skewX(-5deg);
}

.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; max-width: 1200px; margin: 0 auto; }

.feature-card { 
    padding: 40px 30px; 
    text-align: center; 
    background: linear-gradient(135deg, rgba(20,20,20,0.8), rgba(5,5,5,0.9));
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.05);
    transition: all 0.3s; 
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 2px;
    background: linear-gradient(90deg, transparent, var(--acid-cyan), transparent);
    opacity: 0; transition: opacity 0.3s;
}
.feature-card:hover { 
    transform: translateY(-8px); 
    background: linear-gradient(135deg, rgba(30,30,30,0.9), rgba(10,10,10,1));
    border-color: rgba(0,255,255,0.3);
    box-shadow: 0 10px 30px rgba(0,255,255,0.1);
}
.feature-card:hover::before { opacity: 1; }
.feature-card h3 { 
    font-size: 24px; 
    margin-bottom: 15px; 
    font-weight: 900; 
    color: var(--acid-cyan);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.feature-card p { color: #aaa; font-size: 15px; font-family: 'Arial', sans-serif;}

/* Blog Section */
.blog { padding: 100px 5%; background: #050505; position: relative;}
.blog-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; max-width: 1100px; margin: 0 auto; }
.blog-card { 
    display: flex; 
    flex-direction: column; 
    background: #111;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.05);
    transition: all 0.3s;
}
.blog-card:hover { 
    transform: translateY(-8px); 
    border-color: var(--acid-pink);
    box-shadow: 0 10px 30px rgba(255,0,255,0.15);
}
.blog-card img { 
    width: 100%; height: 260px; object-fit: cover; 
    filter: grayscale(50%) contrast(1.2);
    transition: filter 0.3s;
}
.blog-card:hover img { filter: grayscale(0%) contrast(1.3) saturate(1.5); }
.blog-content { padding: 35px; }
.blog-date { display: inline-block; margin-bottom: 15px; font-size: 12px; color: #000; background: var(--acid-pink); padding: 4px 12px; border-radius: 20px; font-weight: 900; text-transform: uppercase;}
.blog-content h3 { font-size: 22px; margin-bottom: 15px; font-weight: 900; color: #fff; text-transform: uppercase;}
.blog-content p { color: #aaa; margin-bottom: 0; font-family: 'Arial', sans-serif; font-size: 14px;}
.btn-more { 
    display: block; 
    width: 240px; 
    margin: 60px auto 0; 
    text-align: center; 
    padding: 16px; 
    background: transparent;
    color: var(--acid-pink); 
    font-weight: 900; 
    border: 2px solid var(--acid-pink);
    border-radius: 50px;
    transition: all 0.3s; 
    text-transform: uppercase;
    transform: skewX(-10deg);
}
.btn-more:hover { background: var(--acid-pink); color: #000; box-shadow: 0 0 20px rgba(255,0,255,0.5);}

/* FAQ Section */
.faq { padding: 100px 5%; max-width: 900px; margin: 0 auto; background: #0a0a0a; margin-top: 40px; margin-bottom: 80px; border-radius: 20px; border: 1px solid rgba(255,255,255,0.05); box-shadow: 0 20px 50px rgba(0,0,0,0.5);}
.faq-item { 
    background: #111; 
    margin-bottom: 20px; 
    padding: 25px 30px; 
    border-radius: 12px;
    border-left: 4px solid var(--acid-green);
    transition: all 0.3s;
}
.faq-item:hover { 
    background: #1a1a1a;
    box-shadow: 0 5px 15px rgba(204,255,0,0.1);
}
.faq-question { font-size: 18px; font-weight: 900; margin-bottom: 12px; color: #fff; text-transform: uppercase; letter-spacing: 1px;}
.faq-answer { color: #aaa; font-size: 15px; font-family: 'Arial', sans-serif; line-height: 1.8;}

/* Footer */
.footer { background: #000; padding: 80px 5% 30px; color: #666; border-top: 1px solid rgba(255,255,255,0.1);}
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; max-width: 1200px; margin: 0 auto 50px; }
.footer-col h4 { font-size: 18px; color: #fff; margin-bottom: 25px; font-weight: 900; text-transform: uppercase; letter-spacing: 2px;}
.footer-col ul li { margin-bottom: 15px; }
.footer-col ul li a { color: #888; transition: all 0.2s; font-family: 'Arial', sans-serif; font-size: 14px;}
.footer-col ul li a:hover { color: var(--acid-cyan); text-shadow: 0 0 8px var(--acid-cyan);}
.footer-bottom { text-align: center; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.05); font-size: 12px; font-family: 'Arial', sans-serif;}

/* Download Page Grid */
.download-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 30px; max-width: 1100px; margin: 60px auto; padding: 0 5%; }
.download-card { 
    padding: 40px 30px; 
    text-align: center; 
    background: #111; 
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.05);
    transition: all 0.3s;
}
.download-card:hover { 
    transform: translateY(-8px); 
    border-color: var(--acid-green);
    box-shadow: 0 10px 30px rgba(204,255,0,0.15);
}
.download-card h3 { font-size: 24px; margin-bottom: 15px; font-weight: 900; color: #fff; text-transform: uppercase;}
.download-card p { color: #aaa; margin-bottom: 30px; font-size: 14px; font-family: 'Arial', sans-serif;}
.btn-dl-card { 
    display: inline-block; 
    padding: 14px 30px; 
    background: var(--chrome-light);
    color: #000; 
    font-weight: 900; 
    border-radius: 50px;
    transition: all 0.2s; 
    text-transform: uppercase;
    transform: skewX(-10deg);
}
.btn-dl-card:hover { 
    background: var(--acid-green); 
    box-shadow: 0 0 15px rgba(204,255,0,0.5);
}

/* Page specific headers */
.page-header { 
    padding: 100px 5% 80px; 
    text-align: center; 
    background: radial-gradient(circle at 50% 0%, rgba(0,255,255,0.1) 0%, transparent 70%);
}
.page-header-content {
    max-width: 800px;
    margin: 0 auto;
}
.page-header h1 { 
    font-size: 48px; 
    margin-bottom: 20px; 
    font-weight: 900;
    transform: skewX(-5deg);
}
.page-header p { font-size: 18px; color: var(--acid-cyan); font-family: 'Arial', sans-serif; letter-spacing: 1px;}

/* SVG Definitions for Chrome/Liquid effects */
svg.defs-only { display: none; }

/* === perf: reduce motion & lower GPU cost === */
.feature-card,
.blog-card,
.hero-content,
.glass-panel,
.pearl-card {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}
.navbar {
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}

/* perf: limit decorative infinite layers on mid/low-end devices */
@media (max-width: 768px) {
    .bubble:nth-child(n+3),
    .tiny-plane:nth-child(n+3),
    .bg-shard:nth-child(n+4),
    .orb:nth-child(n+2) {
        display: none !important;
    }
}