:root{--brand-purple:#7c3aed;--brand-purple-light:#ede9fe;--bg-color:#f8f9fa;--card-bg:#ffffff;--text-main:#1f2937;--text-muted:#6b7280;--border-color:#e5e7eb;--radius-sm:8px;--radius-md:12px;--radius-pill:50px;--font-stack:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;}
*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:var(--font-stack);background-color:var(--bg-color);color:var(--text-main);line-height:1.6;-webkit-font-smoothing:antialiased;}
a{text-decoration:none;color:inherit;}
img{max-width:100%;display:block;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}

/* Header */
.site-header{position:sticky;top:0;background:rgba(255,255,255,0.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--border-color);z-index:100;}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;}
.brand-logo{display:flex;align-items:center;gap:12px;font-weight:bold;font-size:20px;color:var(--text-main);}
.brand-logo img{height:32px;width:auto;}
.nav-links{display:flex;gap:24px;}
.nav-links a{font-size:14px;font-weight:500;color:var(--text-muted);transition:color 0.2s;}
.nav-links a:hover{color:var(--brand-purple);}

/* Hero */
.hero-section{padding:60px 0;background:var(--card-bg);border-bottom:1px solid var(--border-color);}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;}
.hero-content h1{font-size:36px;font-weight:800;line-height:1.2;margin-bottom:16px;color:var(--text-main);}
.hero-content h1 span{color:var(--brand-purple);}
.hero-content p{font-size:16px;color:var(--text-muted);margin-bottom:24px;}
.hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:32px;background:var(--bg-color);padding:20px;border-radius:var(--radius-md);border:1px solid var(--border-color);}
.stat-item{display:flex;flex-direction:column;}
.stat-value{font-size:24px;font-weight:800;color:var(--brand-purple);}
.stat-label{font-size:13px;color:var(--text-muted);}
.download-btns{display:flex;flex-wrap:wrap;gap:12px;}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border-radius:var(--radius-pill);font-size:15px;font-weight:600;transition:all 0.2s;cursor:pointer;border:1px solid transparent;}
.btn-primary{background:var(--brand-purple);color:#fff;}
.btn-primary:hover{background:#6d28d9;box-shadow:0 4px 12px rgba(124,58,237,0.3);}
.btn-outline{background:transparent;color:var(--text-main);border-color:var(--border-color);}
.btn-outline:hover{border-color:var(--brand-purple);color:var(--brand-purple);}

.hero-carousel{position:relative;width:100%;max-width:360px;margin:0 auto;aspect-ratio:3/4;border-radius:var(--radius-md);overflow:hidden;background:var(--bg-color);border:1px solid var(--border-color);}
.carousel-img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity 0.5s ease-in-out;}
.carousel-img.active{opacity:1;}

/* Section Common */
.section{padding:60px 0;border-bottom:1px solid var(--border-color);}
.section-header{text-align:center;margin-bottom:40px;}
.section-header h2{font-size:28px;font-weight:800;margin-bottom:8px;}
.section-header p{font-size:15px;color:var(--text-muted);}

/* Library Grid */
.pill-tabs{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:32px;}
.pill-tab{padding:8px 20px;background:var(--card-bg);border:1px solid var(--border-color);border-radius:var(--radius-pill);font-size:14px;font-weight:500;color:var(--text-muted);cursor:pointer;transition:all 0.2s;}
.pill-tab.active,.pill-tab:hover{background:var(--brand-purple-light);color:var(--brand-purple);border-color:var(--brand-purple);}
.grid-wall{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:20px;}
.grid-card{background:var(--card-bg);border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--border-color);transition:transform 0.2s;display:flex;flex-direction:column;}
.grid-card:hover{transform:translateY(-4px);box-shadow:0 10px 20px rgba(0,0,0,0.05);}
.grid-card-img{width:100%;aspect-ratio:3/4;object-fit:cover;}
.grid-card-info{padding:12px;}
.grid-card-title{font-size:14px;font-weight:600;color:var(--text-main);margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.grid-card-chapter{font-size:12px;color:var(--text-muted);}

/* Feature Tri-grid */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.feature-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:32px 24px;text-align:center;transition:border-color 0.2s;}
.feature-card:hover{border-color:var(--brand-purple);}
.feature-icon{width:48px;height:48px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;background:var(--brand-purple-light);color:var(--brand-purple);border-radius:50%;}
.feature-icon svg{width:24px;height:24px;}
.feature-card h3{font-size:18px;font-weight:700;margin-bottom:12px;color:var(--text-main);}
.feature-card p{font-size:14px;color:var(--text-muted);}

/* 4K Split Screen */
.split-screen{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;}
.split-img-wrapper{position:relative;width:100%;aspect-ratio:4/3;border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--border-color);background:var(--card-bg);}
.split-img-wrapper img{width:100%;height:100%;object-fit:cover;}
.split-label{position:absolute;bottom:16px;left:16px;background:rgba(0,0,0,0.6);color:#fff;padding:4px 12px;border-radius:var(--radius-pill);font-size:12px;font-weight:500;}
.split-label.hq{background:var(--brand-purple);}
.split-line{position:absolute;top:0;bottom:0;left:50%;width:3px;background:var(--brand-purple);transform:translateX(-50%);box-shadow:0 0 10px rgba(124,58,237,0.5);}
.split-line::after{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:24px;height:24px;background:#fff;border:3px solid var(--brand-purple);border-radius:50%;}
.split-content h3{font-size:24px;font-weight:800;color:var(--brand-purple);margin-bottom:16px;}
.split-content p{font-size:15px;color:var(--text-muted);}

/* Community */
.community-list{display:flex;flex-direction:column;gap:12px;}
.community-card{display:flex;align-items:center;background:var(--card-bg);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:16px;gap:16px;}
.comm-avatar{width:48px;height:48px;border-radius:50%;object-fit:cover;border:2px solid var(--brand-purple-light);}
.comm-info{flex:1;}
.comm-name{font-size:15px;font-weight:600;display:flex;align-items:center;gap:8px;margin-bottom:4px;}
.comm-tag{font-size:11px;background:var(--bg-color);color:var(--text-muted);padding:2px 8px;border-radius:var(--radius-pill);}
.comm-progress-wrapper{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--text-muted);}
.comm-progress-bar{flex:1;height:6px;background:var(--bg-color);border-radius:3px;overflow:hidden;}
.comm-progress-fill{height:100%;background:var(--brand-purple);border-radius:3px;}

/* Task Panel */
.task-panel{display:grid;grid-template-columns:1fr 1fr;gap:32px;}
.panel-box{background:var(--card-bg);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:24px;}
.panel-box h3{font-size:18px;font-weight:700;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--border-color);}
.vote-item{margin-bottom:16px;}
.vote-text{display:flex;justify-content:space-between;font-size:14px;margin-bottom:8px;}
.vote-bar{height:8px;background:var(--bg-color);border-radius:4px;overflow:hidden;}
.vote-fill{height:100%;background:var(--brand-purple);border-radius:4px;}
.fanart-item{display:flex;gap:12px;margin-bottom:16px;align-items:center;}
.fanart-thumb{width:60px;height:60px;border-radius:var(--radius-sm);object-fit:cover;background:var(--bg-color);}
.fanart-info{flex:1;}
.fanart-title{font-size:14px;font-weight:600;}
.fanart-likes{font-size:12px;color:var(--text-muted);}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:250px 1fr;gap:32px;}
.faq-categories{border-right:1px solid var(--border-color);padding-right:24px;}
.faq-cat{padding:12px 16px;font-size:14px;font-weight:500;color:var(--text-muted);cursor:pointer;border-radius:var(--radius-sm);margin-bottom:8px;transition:all 0.2s;}
.faq-cat.active{background:var(--brand-purple-light);color:var(--brand-purple);font-weight:600;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{border:1px solid var(--border-color);border-radius:var(--radius-md);background:var(--card-bg);overflow:hidden;}
.faq-q{padding:16px 20px;font-size:15px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;}
.faq-a{padding:0 20px 16px;font-size:14px;color:var(--text-muted);display:none;}

/* Footer */
.site-footer{background:var(--card-bg);padding:40px 0 20px;border-top:1px solid var(--border-color);}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:40px;}
.footer-brand p{font-size:14px;color:var(--text-muted);margin-top:12px;max-width:300px;}
.footer-links h4{font-size:15px;font-weight:700;margin-bottom:16px;}
.footer-links ul{list-style:none;}
.footer-links li{margin-bottom:8px;}
.footer-links a{font-size:14px;color:var(--text-muted);transition:color 0.2s;}
.footer-links a:hover{color:var(--brand-purple);}
.footer-bottom{border-top:1px solid var(--border-color);padding-top:20px;text-align:center;font-size:13px;color:var(--text-muted);display:flex;flex-direction:column;gap:8px;}

/* Download Section */
.install-section{padding:60px 0;background:var(--brand-purple-light);}
.install-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:40px;}
.step-card{background:var(--card-bg);border-radius:var(--radius-md);padding:24px;border:1px solid var(--border-color);}
.step-num{width:32px;height:32px;background:var(--brand-purple);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:bold;margin-bottom:16px;}
.step-card h4{font-size:16px;font-weight:700;margin-bottom:8px;}
.step-card p{font-size:14px;color:var(--text-muted);}
.download-action{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;}

/* Baidu Modal */
.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.5);z-index:999;display:none;align-items:center;justify-content:center;padding:20px;}
.modal-content{background:var(--card-bg);border-radius:var(--radius-md);padding:24px;max-width:400px;width:100%;text-align:center;}
.modal-content p{font-size:15px;margin-bottom:16px;color:var(--text-main);}
.modal-input-group{display:flex;gap:8px;margin-bottom:16px;}
.modal-input{flex:1;padding:10px 12px;border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:14px;color:var(--text-main);background:var(--bg-color);}
.modal-btn{background:var(--brand-purple);color:#fff;border:none;padding:10px 16px;border-radius:var(--radius-sm);cursor:pointer;font-weight:600;}
.modal-close{background:transparent;color:var(--text-muted);border:none;cursor:pointer;font-size:14px;margin-top:8px;}

@media (max-width: 1024px){
    .hero-grid, .split-screen, .task-panel{grid-template-columns:1fr;}
    .hero-carousel{max-width:300px;}
    .feature-grid{grid-template-columns:1fr 1fr;}
    .footer-grid{grid-template-columns:1fr 1fr;}
    .install-steps{grid-template-columns:1fr 1fr;}
}
@media (max-width: 768px){
    .nav-links{display:none;}
    .hero-content h1{font-size:28px;}
    .feature-grid{grid-template-columns:1fr;}
    .grid-wall{grid-template-columns:repeat(2,1fr);}
    .faq-grid{grid-template-columns:1fr;}
    .faq-categories{display:flex;overflow-x:auto;border-right:none;padding-right:0;border-bottom:1px solid var(--border-color);padding-bottom:12px;white-space:nowrap;}
    .footer-grid{grid-template-columns:1fr;}
    .install-steps{grid-template-columns:1fr;}
    .download-btns{flex-direction:column;}
    .download-btns .btn{width:100%;}
    .download-action{flex-direction:column;}
    .download-action .btn{width:100%;}
    .split-img-wrapper{aspect-ratio:4/3;}
    .community-card{flex-direction:column;align-items:flex-start;text-align:left;}
    .comm-progress-wrapper{width:100%;}
    .panel-box{padding:16px;}
}