:root {
    --bg: #050505;
    --primary: #3b82f6;
    --accent: #10b981;
    --text: #e5e5e5;
    --text-dim: #a3a3a3;
    --glass: rgba(255, 255, 255, 0.03);
    --border: rgba(255, 255, 255, 0.08);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    overflow-x: hidden;
}

/* 极简背景： subtle gradient mesh */
.bg-mesh {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: 
        radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.08), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(16, 185, 129, 0.05), transparent 25%);
    z-index: -1;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航 */
nav {
    padding: 32px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-weight: 700;
    font-size: 18px;
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}
.logo span { color: var(--primary); }

.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 14px;
    margin-left: 24px;
    transition: color 0.2s;
}
.nav-links a:hover { color: white; }

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    text-align: center;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 100px;
    color: var(--primary);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 32px;
}

h1 {
    font-size: 56px;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
    background: linear-gradient(to bottom right, #fff, #a3a3a3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 20px;
    color: var(--text-dim);
    max-width: 600px;
    margin: 0 auto 48px;
    font-weight: 300;
}

/* 核心交互：下载 */
.cta-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.download-btn {
    background: white;
    color: black;
    padding: 16px 48px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 40px -10px rgba(255, 255, 255, 0.1);
}

.version-info {
    font-size: 13px;
    color: var(--text-dim);
    display: flex;
    gap: 16px;
    align-items: center;
    justify-content: center; /* Ensure center alignment on mobile */
}
.version-info span { display: flex; align-items: center; gap: 4px; }

/* 抽象视觉元素：动态声波 */
.visual-wave {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    margin: 60px 0;
    opacity: 0.6;
}
.bar {
    width: 4px;
    background: var(--primary);
    border-radius: 2px;
    animation: wave 1s ease-in-out infinite;
}
@keyframes wave {
    0%, 100% { height: 10px; opacity: 0.3; }
    50% { height: 40px; opacity: 1; }
}

/* 特性网格 */
.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 80px;
    border-top: 1px solid var(--border);
    padding-top: 60px;
}

.feature-item h3 {
    font-size: 16px;
    color: white;
    margin-bottom: 8px;
    font-weight: 600;
}

.feature-item p {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.6;
}

/* Footer */
footer {
    margin-top: 120px;
    padding-bottom: 40px;
    text-align: center;
    color: var(--text-dim);
    font-size: 13px;
    border-top: 1px solid var(--border);
    padding-top: 40px;
}

@media (max-width: 768px) {
    h1 { font-size: 40px; }
    .features { grid-template-columns: 1fr; gap: 40px; }
    .version-info { flex-wrap: wrap; }
}