.index_main {
    position: relative;
    width: 100%;
    min-height: 200px;
    display: block;
    margin: 0 auto;
    overflow: hidden; 
}
.index_mainbox {
    position: relative;
    width: 100%;
    max-width: 1200px;
    display: block;
    margin: 0 auto;

}
:root {
            --primary-color: #ff6b81;
            --primary-hover: #ff4757;
            --bg-dark: #0f0f0f;
            --card-bg: #1e1e1e;
            --text-main: #ffffff;
            --text-dim: #a0a0a0;
            --accent-gradient: linear-gradient(135deg, #ff6b81 0%, #ff4757 100%);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-dark);
            color: var(--text-main);
            overflow-x: hidden;
            line-height: 1.6;
        }

        /* Hero Section */
        .hero-wrapper {
            background: linear-gradient(rgba(15,15,15,0.8), rgba(15,15,15,0.8)), 
                        url('https://images.weserv.nl/?url=https://images.unsplash.com/photo-1550684848-86a5d8727436?w=1920&q=80') center/cover no-repeat;
        }

        .hero {
            height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            padding: 20px;
        }

        .logo {
            font-size: 4rem;
            font-weight: 800;
            background: var(--accent-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 1rem;
            letter-spacing: -2px;
        }

        .slogan {
            font-size: 1.5rem;
            color: var(--text-dim);
            margin-bottom: 3rem;
            max-width: 800px;
        }

        .cta-group {
            display: flex;
            gap: 20px;
            margin-bottom: 4rem;
        }

        .btn {
            padding: 15px 40px;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-primary {
            background: var(--accent-gradient);
            color: white;
            box-shadow: 0 10px 20px rgba(255, 107, 129, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(255, 107, 129, 0.4);
        }

        .btn-outline {
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
        }

        .btn-outline:hover {
            background: rgba(255, 107, 129, 0.1);
            transform: translateY(-3px);
        }

        /* Stats Bar */
        .stats-bar {
            display: flex;
            gap: 60px;
        }

        .stat-item { text-align: center; }
        .stat-value { font-size: 2.5rem; font-weight: 800; color: white; display: block; margin-bottom: 5px; }
        .stat-label { font-size: 0.9rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; }

        /* Container & Titles */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 80px 20px;
        }

        .section-title {
            font-size: 2.5rem;
            margin-bottom: 40px;
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .section-title::before {
            content: "";
            width: 8px;
            height: 40px;
            background: var(--primary-color);
            border-radius: 4px;
        }

        /* Features */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .feature-card {
            background: var(--card-bg);
            padding: 40px 30px;
            border-radius: 24px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            transition: all 0.3s ease;
        }

        .feature-card:hover {
            transform: translateY(-10px);
            border-color: var(--primary-color);
        }

        .feature-icon {
            width: 50px;
            height: 50px;
            background: var(--accent-gradient);
            border-radius: 12px;
            margin-bottom: 20px;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 1.5rem;
        }

        .feature-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 12px; }
        .feature-desc { font-size: 0.95rem; color: var(--text-dim); line-height: 1.6; }

        /* Videos Grid */
        .video-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .video-card {
            background: var(--card-bg);
            border-radius: 16px;
            overflow: hidden;
            transition: transform 0.3s ease;
            text-decoration: none;
            color: inherit;
        }

        .video-card:hover { transform: translateY(-10px); }

        .thumbnail-wrapper {
            position: relative;
            padding-top: 177.7%;
            background: #2a2a2a;
        }

        .thumbnail {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .video-info { padding: 15px; }
        .video-title { font-size: 1rem; font-weight: 600; margin-bottom: 8px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .video-meta { display: flex; justify-content: space-between; color: var(--text-dim); font-size: 0.85rem; }

        /* Creators Grid */
        .creator-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
        }

        .creator-card {
            background: var(--card-bg);
            padding: 25px 15px;
            border-radius: 20px;
            text-align: center;
            border: 1px solid transparent;
            transition: all 0.3s ease;
        }

        .creator-card:hover { transform: translateY(-5px); border-color: var(--primary-color); }

        .creator-avatar {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            margin: 0 auto 12px;
            padding: 2px;
            background: var(--accent-gradient);
        }

        .creator-avatar img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; border: 2px solid var(--card-bg); }
        .creator-name { font-size: 1.1rem; font-weight: 600; margin-bottom: 4px; }
        .creator-tag { font-size: 0.75rem; color: var(--primary-color); background: rgba(255, 107, 129, 0.1); padding: 2px 8px; border-radius: 10px; margin-bottom: 12px; display: inline-block; }
        
        .creator-join-card { background: var(--accent-gradient); color: white; display: flex; flex-direction: column; justify-content: center; align-items: center; }
        .btn-white { background: white; color: var(--primary-color); padding: 8px 20px; border-radius: 25px; text-decoration: none; font-weight: 600; font-size: 0.85rem; }

        /* FAQ (Pure CSS with <details>) */
        .feedback-faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; }
        .feedback-item { background: var(--card-bg); padding: 20px; border-radius: 16px; margin-bottom: 20px; }
        .user-info { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
        .user-avatar-small { width: 40px; height: 40px; border-radius: 50%; background: var(--accent-gradient); display: flex; justify-content: center; align-items: center; font-size: 0.8rem; }
        
        details { background: var(--card-bg); border-radius: 12px; margin-bottom: 15px; border: 1px solid rgba(255,255,255,0.05); }
        summary { padding: 18px 20px; cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; align-items: center; }
        summary::after { content: "▼"; font-size: 0.8rem; transition: transform 0.3s; }
        details[open] summary::after { transform: rotate(180deg); }
        .faq-answer { padding: 0 20px 20px; color: var(--text-dim); font-size: 0.9rem; }

        /* Download Section */
        .download-section { background: linear-gradient(to bottom, #161616, #000); padding: 100px 20px; text-align: center; }
        .download-platforms { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 50px; }
        .platform-card { background: var(--card-bg); padding: 40px 20px; border-radius: 24px; border: 1px solid rgba(255,255,255,0.05); transition: all 0.3s ease; }
        .platform-card:hover { transform: translateY(-10px); border-color: var(--primary-color); }
        .platform-icon { font-size: 3rem; margin-bottom: 20px; display: block; }
        .platform-btn { margin-top: 20px; padding: 10px 30px; background: var(--accent-gradient); color: white; border-radius: 50px; text-decoration: none; font-weight: 600; display: inline-block; }
        .qr-container { margin: 20px auto; width: 120px; height: 120px; background: white; padding: 10px; border-radius: 12px; }
        .qr-placeholder { width: 100%; height: 100%; background: repeating-conic-gradient(#000 0% 25%, #fff 0% 50%) 50% / 8px 8px; }

        /* Responsive */
        @media (max-width: 1024px) {
            .video-grid, .creator-grid { grid-template-columns: repeat(3, 1fr); }
            .features-grid, .download-platforms { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .logo { font-size: 3rem; }
            .cta-group { flex-direction: column; width: 100%; max-width: 300px; }
            .stats-bar { gap: 30px; }
            .video-grid, .creator-grid, .features-grid, .download-platforms, .feedback-faq-grid { grid-template-columns: 1fr; }
            .stat-value { font-size: 2rem; }
        }