* { box-sizing: border-box; }
        body { font-family: 'Helvetica Neue', Arial, sans-serif; line-height: 1.6; color: #333; margin: 0; }
        .section-padding { padding: 80px 10%; }
        
        /* 占位符与尺寸标注 */
        .poster-placeholder { height: 450px; background: #e5e5e5; border: 2px dashed #7f8c8d; display: flex; flex-direction: column; align-items: center; justify-content: center; color: #7f8c8d; font-weight: bold; margin: 20px 0; }
        .part-placeholder { height: 300px; background: #f0f0f0; border: 1px solid #dcdcdc; display: flex; flex-direction: column; align-items: center; justify-content: center; color: #999; }
        
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
        .grid-4 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
        .cta-btn { display: inline-block; padding: 20px 50px; background: #c0392b; color: #fff; text-decoration: none; font-weight: bold; }
        
        h2 { border-left: 4px solid #c0392b; padding-left: 15px; }