.ppt-download{display:flex;justify-content:center;align-items:center;min-height:100vh;background:#f5f7fa;padding:20px;box-sizing:border-box}.ppt-download-content{background:#fff;border-radius:12px;padding:40px 32px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.08);max-width:360px;width:100%}.ppt-title{font-size:22px;font-weight:600;color:#1a5fb4;margin:0 0 10px 0}.ppt-desc{font-size:14px;color:#666;margin:0 0 28px 0}.download-btn{background:#1a5fb4;color:#fff;border:none;border-radius:8px;padding:14px 40px;font-size:16px;font-weight:500;cursor:pointer;transition:background .2s}.download-btn:hover{background:#154a8c}.download-btn:disabled{background:#9ab5d6;cursor:not-allowed}.ppt-status{margin-top:16px;font-size:14px;color:#999}