/* 下载详情页自定义样式 */
        .download-detail-box {
            padding: 50px 0;
            background: #fff;
        }

        .download-detail__img {
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }

        .download-detail__img img {
            width: 100%;
            height: auto;
            display: block;
        }

        .download-detail__content h1 {
            font-size: 32px;
            font-weight: 700;
            color: #222;
            margin-bottom: 20px;
        }

        .download-detail__meta {
            display: flex;
            gap: 20px;
            margin-bottom: 30px;
            color: #666;
            font-size: 14px;
        }

        .download-detail__meta span {
            display: flex;
            align-items: center;
        }

        .download-detail__meta i {
            margin-right: 8px;
            color: #d11200;
            /* RedStar Red */
        }

        .download-detail__text {
            color: #666;
            line-height: 1.8;
            margin-bottom: 40px;
            font-size: 16px;
        }

        .download-btn-large {
            display: inline-flex;
            align-items: center;
            padding: 15px 40px;
            background: #2c3e50;
            color: #fff;
            font-size: 18px;
            font-weight: 600;
            border-radius: 5px;
            transition: all 0.3s ease;
            text-decoration: none;
        }

        .download-btn-large:hover {
            background: #d11200;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
        }

        .download-btn-large i {
            margin-right: 12px;
            font-size: 20px;
        }

        /* 弹窗样式 (复用 category_down.html 的样式) */
        #download-form-popup {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 9999;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .popup-content {
            background: #fff;
            padding: 30px;
            border-radius: 8px;
            width: 100%;
            max-width: 500px;
            position: relative;
            animation: popupFadeIn 0.3s ease;
        }

        @keyframes popupFadeIn {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .close-popup {
            position: absolute;
            top: 15px;
            right: 15px;
            font-size: 24px;
            cursor: pointer;
            color: #666;
            transition: color 0.3s ease;
        }

        .close-popup:hover {
            color: #d11200;
        }

        .popup-title {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 25px;
            color: #222;
            text-align: center;
            padding-bottom: 15px;
            border-bottom: 1px solid #eee;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #333;
            font-weight: 500;
            font-size: 14px;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 14px;
            transition: border-color 0.3s ease;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #2c3e50;
            box-shadow: 0 0 0 2px rgba(44, 62, 80, 0.1);
        }

        .form-group textarea {
            height: 100px;
            resize: none;
        }

        .submit-btn {
            width: 100%;
            padding: 14px;
            background: #2c3e50;
            color: #fff;
            border: none;
            border-radius: 4px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 16px;
        }

        .submit-btn:hover {
            background: #34495e;
        }

        .submit-btn:disabled {
            background: #95a5a6;
            cursor: not-allowed;
        }

        /* 加载中遮罩 */
        .loading-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(255, 255, 255, 0.8);
            z-index: 99999;
            display: none;
            align-items: center;
            justify-content: center;
            flex-direction: column;
        }

        .loading-spinner {
            width: 50px;
            height: 50px;
            border: 5px solid #f3f3f3;
            border-top: 5px solid #2c3e50;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-bottom: 20px;
        }

        @keyframes spin {
            0% {
                transform: rotate(0deg);
            }

            100% {
                transform: rotate(360deg);
            }
        }

        .loading-text {
            font-size: 16px;
            color: #333;
            font-weight: 500;
        }