/* ============================================
   首页专属样式 - 赛博霓虹风格
   ============================================ */

.top-bar {
    padding-top: 80px;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-bottom: 1px solid var(--border-subtle);
    position: relative;
}
.top-bar::after {
    content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent); opacity: 0.3;
}
.top-bar-content {
    display: flex; align-items: center; justify-content: center; gap: var(--space-md);
    padding: var(--space-md) 0; font-size: 0.85rem; font-family: var(--font-display);
}
.brand-name { font-weight: 600; color: var(--neon-cyan); text-shadow: 0 0 10px var(--neon-cyan-glow); letter-spacing: 2px; }
.divider { color: var(--text-muted); }
.update-info { color: var(--text-secondary); letter-spacing: 1px; }
.update-info span { color: var(--neon-green); }

/* Hero */
.hero {
    padding: var(--space-4xl) 0;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
    text-align: center; position: relative; overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
    width: 800px; height: 800px;
    background: radial-gradient(circle, rgba(0,245,255,0.1) 0%, transparent 50%),
                radial-gradient(circle, rgba(255,0,255,0.08) 30%, transparent 60%);
    pointer-events: none; animation: heroGlow 8s ease-in-out infinite;
}
@keyframes heroGlow { 0%,100%{transform:translate(-50%,-50%) scale(1);opacity:0.8;} 50%{transform:translate(-50%,-50%) scale(1.1);opacity:1;} }

.hero-content { max-width: 900px; margin: 0 auto; position: relative; z-index: 1; }
.trust-badge-wrap { margin-bottom: var(--space-2xl); }
.hero-title { font-family: var(--font-display); font-size: 3.5rem; font-weight: 800; line-height: 1.2; margin-bottom: var(--space-lg); color: var(--text-primary); letter-spacing: 2px; }
.hero-title .gradient-text { display: block; margin-top: var(--space-sm); }
.hero-subtitle { font-size: 1.35rem; color: var(--text-secondary); margin-bottom: var(--space-xl); letter-spacing: 1px; }

.hero-platforms { display: flex; justify-content: center; gap: var(--space-xl); margin-bottom: var(--space-2xl); }
.platform-icon { font-size: 2.5rem; opacity: 0.6; transition: all var(--transition-base); filter: grayscale(100%); cursor: pointer; }
.platform-icon:hover { opacity: 1; filter: grayscale(0%); transform: translateY(-5px); }
.platform-icon[data-platform="windows"]:hover { filter: drop-shadow(0 0 15px var(--neon-cyan)); }
.platform-icon[data-platform="macos"]:hover { filter: drop-shadow(0 0 15px var(--neon-pink)); }
.platform-icon[data-platform="android"]:hover { filter: drop-shadow(0 0 15px var(--neon-green)); }
.platform-icon[data-platform="ios"]:hover { filter: drop-shadow(0 0 15px var(--neon-purple)); }
.platform-icon[data-platform="linux"]:hover { filter: drop-shadow(0 0 15px var(--neon-green)); }

.hero-cta { margin-bottom: var(--space-2xl); }
.hero-cta .btn { min-width: 260px; font-family: var(--font-display); letter-spacing: 1px; }

/* Stats */
.stats { background: var(--bg-primary); padding: var(--space-3xl) 0; border-top: 1px solid var(--border-subtle); border-bottom: 1px solid var(--border-subtle); position: relative; }
.stats::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--neon-purple), transparent); }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: var(--space-xl); }
.stat-item { text-align: center; padding: var(--space-lg); position: relative; }
.stat-item::after { content: ''; position: absolute; right: 0; top: 50%; transform: translateY(-50%); width: 1px; height: 60%; background: linear-gradient(180deg, transparent, var(--border-neon), transparent); }
.stat-item:last-child::after { display: none; }
.stat-number { display: block; font-family: var(--font-display); font-size: 2.75rem; font-weight: 700; color: var(--neon-cyan); line-height: 1; margin-bottom: var(--space-sm); text-shadow: 0 0 20px var(--neon-cyan-glow); }
.stat-label { font-size: 0.9rem; color: var(--text-secondary); letter-spacing: 1px; }

/* Features */
.features { background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%); position: relative; }
.section-header { text-align: center; margin-bottom: var(--space-3xl); }
.section-title { font-family: var(--font-display); font-size: 2.5rem; font-weight: 700; color: var(--text-primary); margin-bottom: var(--space-md); letter-spacing: 2px; }
.section-desc { font-size: 1.1rem; color: var(--text-secondary); }

.features-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--space-lg); }
.feature-card {
    background: var(--bg-glass); border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg); padding: var(--space-xl);
    text-align: center; backdrop-filter: blur(10px);
    transition: all var(--transition-base); position: relative; overflow: hidden;
}
.feature-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    opacity: 0; transition: opacity var(--transition-base);
}
.feature-card:hover { transform: translateY(-8px); border-color: var(--border-neon); box-shadow: 0 20px 50px rgba(0,0,0,0.4),0 0 30px var(--neon-cyan-glow); }
.feature-card:hover::before { opacity: 1; }

.feature-icon {
    width: 72px; height: 72px;
    background: linear-gradient(135deg, rgba(0,245,255,0.1), rgba(184,41,221,0.1));
    border: 1px solid var(--border-neon); border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 2rem; margin: 0 auto var(--space-lg);
    box-shadow: 0 0 20px var(--neon-cyan-glow);
    transition: all var(--transition-base);
}
.feature-card:hover .feature-icon { transform: scale(1.1); box-shadow: 0 0 30px var(--neon-cyan-glow),0 0 50px var(--neon-purple-glow); }
.feature-title { font-family: var(--font-display); font-size: 1.1rem; font-weight: 600; color: var(--text-primary); margin-bottom: var(--space-sm); letter-spacing: 0.5px; }
.feature-desc { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.7; }

/* CTA Section */
.cta-section {
    padding: var(--space-4xl) 0;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 50%, var(--bg-secondary) 100%);
    text-align: center; position: relative; overflow: hidden;
}
.cta-section::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(0,245,255,0.1) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 50%, rgba(255,0,255,0.08) 0%, transparent 50%);
    pointer-events: none;
}
.cta-content { max-width: 600px; margin: 0 auto; position: relative; z-index: 1; }
.cta-title { font-family: var(--font-display); font-size: 2.5rem; font-weight: 700; color: var(--text-primary); margin-bottom: var(--space-md); text-shadow: 0 0 30px var(--neon-cyan-glow); letter-spacing: 2px; }
.cta-desc { font-size: 1.2rem; color: var(--text-secondary); margin-bottom: var(--space-xl); }
.cta-section .btn-primary { background: var(--text-primary); color: var(--bg-primary); box-shadow: 0 4px 30px rgba(255,255,255,0.3); }
.cta-section .btn-primary:hover { background: var(--neon-cyan); box-shadow: 0 8px 40px var(--neon-cyan-glow),0 0 60px var(--neon-cyan-glow); }

/* Flow lines */
.flow-lines { position: absolute; top: 0; left: 0; right: 0; bottom: 0; overflow: hidden; pointer-events: none; }
.flow-line { position: absolute; width: 2px; height: 100%; background: linear-gradient(180deg, transparent, var(--neon-cyan), transparent); opacity: 0.3; animation: flowLine 3s linear infinite; }
.flow-line:nth-child(1){left:20%;animation-delay:0s;}
.flow-line:nth-child(2){left:40%;animation-delay:1s;}
.flow-line:nth-child(3){left:60%;animation-delay:2s;}
.flow-line:nth-child(4){left:80%;animation-delay:0.5s;}
@keyframes flowLine { 0%{transform:translateY(-100%);} 100%{transform:translateY(100%);} }

/* Friend links */
.friend-links { margin-top: var(--space-3xl); text-align: center; }
.friend-links h3 { font-family: var(--font-display); font-size: 1rem; font-weight: 600; color: var(--text-muted); margin-bottom: var(--space-md); letter-spacing: 1px; }
.friend-links-list { display: flex; justify-content: center; gap: var(--space-lg); flex-wrap: wrap; }
.friend-links-list a { font-size: 0.85rem; color: var(--text-secondary); padding: var(--space-xs) var(--space-md); border: 1px solid var(--border-subtle); border-radius: var(--radius-full); transition: all var(--transition-fast); }
.friend-links-list a:hover { color: var(--neon-cyan); border-color: var(--neon-cyan); text-shadow: 0 0 10px var(--neon-cyan-glow); box-shadow: 0 0 10px var(--neon-cyan-glow); }

/* Responsive */
@media (max-width: 1024px) {
    .hero-title { font-size: 2.75rem; }
    .features-grid { grid-template-columns: repeat(2,1fr); }
    .stats-grid { grid-template-columns: repeat(2,1fr); }
    .stat-item::after { display: none; }
    .stat-item:nth-child(odd)::after { display: block; }
    .cta-title { font-size: 2rem; }
}
@media (max-width: 768px) {
    .hero { padding: var(--space-3xl) 0; }
    .hero-title { font-size: 2.25rem; }
    .hero-subtitle { font-size: 1.1rem; }
    .hero-platforms { gap: var(--space-lg); }
    .platform-icon { font-size: 2rem; }
    .stats-grid { grid-template-columns: repeat(2,1fr); gap: var(--space-md); }
    .stat-number { font-size: 2rem; }
    .features-grid { grid-template-columns: 1fr; }
    .section-title { font-size: 1.75rem; }
    .cta-title { font-size: 1.75rem; }
}
@media (max-width: 480px) {
    .hero-title { font-size: 1.75rem; }
    .hero-subtitle { font-size: 1rem; }
    .hero-platforms { gap: var(--space-md); }
    .platform-icon { font-size: 1.5rem; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .stat-number { font-size: 1.5rem; }
    .section-title { font-size: 1.5rem; }
    .cta-title { font-size: 1.5rem; }
    .hero-cta .btn { min-width: 200px; }
}