:root {
        --bg-dark: #121212;
        --bg-card: #1e1e1e;
        --primary: #ffc107;
        --primary-hover: #ffca28;
        --text-main: #f5f5f5;
        --text-muted: #a0a0a0;
        --border-color: #333333;
        --container-width: 1200px;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        background-color: var(--bg-dark);
        color: var(--text-main);
        line-height: 1.6;
        overflow-x: hidden;
    }
    a { text-decoration: none; color: inherit; }
    ul { list-style: none; }
    img { max-width: 100%; display: block; object-fit: cover; }
    .container { max-width: var(--container-width); margin: 0 auto; padding: 0 20px; }
    
    /* Header */
    .site-header {
        position: sticky; top: 0; z-index: 100;
        background: rgba(18, 18, 18, 0.95);
        border-bottom: 1px solid var(--border-color);
        backdrop-filter: blur(10px);
    }
    .header-inner {
        display: flex; justify-content: space-between; align-items: center;
        height: 64px;
    }
    .logo-box { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: bold; color: var(--primary); }
    .logo-box img { height: 32px; border-radius: 6px; }
    .nav-links { display: none; gap: 20px; font-size: 14px; color: var(--text-muted); }
    .nav-links a:hover { color: var(--primary); }
    
    /* Hero Section */
    .hero {
        padding: 60px 0 40px;
        background: radial-gradient(circle at top right, rgba(255,193,7,0.1), transparent 40%),
                    radial-gradient(circle at bottom left, rgba(255,193,7,0.05), transparent 40%);
        text-align: center;
    }
    .hero h1 { font-size: 32px; line-height: 1.3; margin-bottom: 20px; }
    .hero h1 span { color: var(--primary); }
    .hero p { color: var(--text-muted); font-size: 16px; max-width: 600px; margin: 0 auto 40px; }
    
    /* Download Buttons */
    .download-group { display: flex; flex-wrap: wrap; justify-content: center; gap: 15px; }
    .btn {
        display: inline-flex; align-items: center; justify-content: center;
        padding: 12px 24px; border-radius: 8px; font-weight: bold; font-size: 16px;
        transition: all 0.3s ease; border: none; cursor: pointer;
    }
    .btn-primary { background-color: var(--primary); color: #000; }
    .btn-primary:hover { background-color: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(255,193,7,0.3); }
    .btn-outline { background-color: transparent; color: var(--text-main); border: 1px solid var(--border-color); }
    .btn-outline:hover { border-color: var(--text-main); background-color: rgba(255,255,255,0.05); }

    /* Poster Showcase */
    .showcase { padding: 40px 0; overflow: hidden; }
    .scroller {
        display: flex; gap: 15px; overflow-x: auto; padding-bottom: 20px;
        scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch;
    }
    .scroller::-webkit-scrollbar { height: 6px; }
    .scroller::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
    .poster-card {
        flex: 0 0 160px; scroll-snap-align: start;
        background: var(--bg-card); border-radius: 12px; overflow: hidden;
        border: 1px solid var(--border-color); position: relative;
    }
    .poster-card img { width: 100%; height: 240px; object-fit: cover; }
    .poster-info { padding: 12px; }
    .poster-info h3 { font-size: 14px; margin-bottom: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .poster-tags { display: flex; gap: 6px; margin-bottom: 8px; flex-wrap: wrap; }
    .poster-tag { font-size: 10px; padding: 2px 6px; background: rgba(255,193,7,0.1); color: var(--primary); border-radius: 4px; }
    .poster-date { font-size: 12px; color: var(--text-muted); }

    /* Section Common */
    .section { padding: 60px 0; }
    .section-title { font-size: 24px; margin-bottom: 30px; display: flex; align-items: center; gap: 10px; }
    .section-title::before { content: ''; display: block; width: 4px; height: 24px; background: var(--primary); border-radius: 2px; }
    .section-desc { color: var(--text-muted); margin-bottom: 40px; font-size: 15px; }

    /* AI Zone */
    .ai-zone { background: #181818; }
    .ai-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
    .ai-card { display: flex; gap: 20px; background: var(--bg-card); border-radius: 12px; padding: 20px; border: 1px solid var(--border-color); }
    .ai-card img { width: 100px; height: 140px; border-radius: 8px; }
    .ai-content h3 { font-size: 18px; margin-bottom: 10px; color: var(--primary); }
    .ai-content p { color: var(--text-muted); font-size: 14px; line-height: 1.5; }

    /* Steps Section */
    .steps { display: grid; grid-template-columns: 1fr; gap: 20px; }
    .step-item { background: var(--bg-card); padding: 20px; border-radius: 12px; border-left: 4px solid var(--primary); }
    .step-item h3 { font-size: 16px; margin-bottom: 8px; }
    .step-item p { font-size: 14px; color: var(--text-muted); }

    /* FAQ Section */
    .faq-list { display: grid; gap: 15px; }
    .faq-item { background: var(--bg-card); padding: 20px; border-radius: 12px; }
    .faq-q { font-size: 16px; font-weight: bold; margin-bottom: 8px; color: var(--primary); }
    .faq-a { font-size: 14px; color: var(--text-muted); }

    /* Reviews Section */
    .reviews { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; }
    .review-card { background: #222; padding: 15px; border-radius: 12px; }
    .review-user { font-size: 13px; color: var(--primary); margin-bottom: 8px; font-weight: bold; }
    .review-text { font-size: 13px; color: var(--text-muted); }

    /* Footer */
    .site-footer { background: #0a0a0a; padding: 40px 0 20px; border-top: 1px solid var(--border-color); }
    .footer-bottom { text-align: center; color: var(--text-muted); font-size: 12px; margin-top: 40px; padding-top: 20px; border-top: 1px solid #222; }
    .update-time { margin-top: 10px; color: #666; }

    /* Responsive */
    @media (min-width: 768px) {
        .nav-links { display: flex; }
        .hero h1 { font-size: 42px; }
        .poster-card { flex: 0 0 200px; }
        .poster-card img { height: 300px; }
        .ai-grid { grid-template-columns: repeat(2, 1fr); }
        .steps { grid-template-columns: repeat(2, 1fr); }
        .reviews { grid-template-columns: repeat(3, 1fr); }
    }
    @media (min-width: 1024px) {
        .hero h1 { font-size: 48px; }
        .ai-grid { grid-template-columns: repeat(3, 1fr); }
        .steps { grid-template-columns: repeat(3, 1fr); }
        .reviews { grid-template-columns: repeat(4, 1fr); }
    }