/* --- 基础设定 --- */
        :root {
            --primary: #111;
            --secondary: #555;
            --gold: #c5a47e; /* 更沉稳的香槟金 */
            --gold-gradient: linear-gradient(135deg, #d4af37 0%, #f3e5b5 50%, #b88a4d 100%);
            --bg: #fcfcfc;
            --light-gray: #f4f4f4;
        }

        body {
            margin: 0;
            font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg);
            color: var(--primary);
            line-height: 1.6;
            /* 依然保留噪点质感，这是去AI味的关键 */
            background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.04'/%3E%3C/svg%3E");
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        h2.section-title {
            font-size: 32px;
            font-weight: 300;
            text-align: center;
            margin-bottom: 60px;
            letter-spacing: 2px;
            position: relative;
            padding-top: 80px;
        }
        
        h2.section-title::after {
            content: '';
            display: block;
            width: 40px;
            height: 2px;
            background: var(--gold);
            margin: 20px auto 0;
        }

        /* --- 视频列表样式 --- */
        .videos-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 40px;
            margin-bottom: 30px;
        }

        .video-card {
            background: #fff;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            transition: all 0.3s ease;
            position: relative;
            cursor: pointer;
        }
        
        .video-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.12);
        }

        .video-thumbnail {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        
        .video-overlay {
            position: absolute;
            top:0; left:0; right:0; bottom:0;
            background: rgba(0,0,0,0.3);
            display: flex;
            justify-content: center;
            align-items: center;
            opacity: 0;
            transition: opacity 0.3s;
        }
        
        .video-card:hover .video-overlay {
            opacity: 1;
        }

        .play-btn-large {
            width: 60px;
            height: 60px;
            background: rgba(255,255,255,0.2);
            backdrop-filter: blur(10px);
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            border: 1px solid rgba(255,255,255,0.5);
            z-index: 2;
            transition: all 0.3s;
        }
        
        .play-btn-large::before {
            content: '';
            border-style: solid;
            border-width: 12px 0 12px 20px;
            border-color: transparent transparent transparent #fff;
            margin-left: 4px;
        }
        
        .video-card:hover .play-btn-large {
            background: var(--gold);
            border-color: var(--gold);
            transform: scale(1.1);
        }

        .video-info {
            padding: 25px;
        }
        
        .video-title {
            font-size: 18px;
            font-weight: 500;
            margin: 0 0 10px 0;
            color: var(--primary);
        }
        
        .video-desc {
            font-size: 14px;
            color: #666;
            margin-bottom: 15px;
            line-height: 1.5;
        }
        
        .video-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 15px;
        }
        
        .video-tag {
            font-size: 11px;
            padding: 4px 10px;
            background: var(--light-gray);
            border-radius: 12px;
            color: var(--secondary);
        }

        /* --- 弹窗样式 --- */
        .modal {
            display: none;
            position: fixed;
            z-index: 1000;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.9);
            backdrop-filter: blur(5px);
        }

        .modal-content {
            position: relative;
            margin: 5% auto;
            width: 80%;
            max-width: 900px;
            background-color: #000;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0,0,0,0.5);
        }

        .video-player {
            width: 100%;
            display: block;
        }

        .modal-info {
            padding: 20px;
            background: #1a1a1a;
            color: #fff;
        }
        
        .modal-title {
            font-size: 20px;
            margin: 0 0 10px 0;
            color: #fff;
        }
        
        .modal-desc {
            font-size: 14px;
            color: #ccc;
            margin-bottom: 15px;
            line-height: 1.5;
        }

        .close {
            position: absolute;
            top: 15px;
            right: 15px;
            color: white;
            font-size: 28px;
            font-weight: bold;
            cursor: pointer;
            z-index: 1001;
            background: rgba(0,0,0,0.5);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            transition: background 0.3s;
        }
        
        .close:hover {
            background: rgba(255,255,255,0.2);
        }

        /* 响应式 */
        @media (min-width: 1200px) {
            .videos-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        
        @media (max-width: 1199px) and (min-width: 769px) {
            .videos-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 768px) {
            .videos-grid {
                grid-template-columns: 1fr;
            }
            h2.section-title {
                padding-top: 40px;
            }
            .modal-content {
                width: 95%;
                margin: 10% auto;
            }
        }