/* 上传相关样式 */
.upload-area {
    border: 3px dashed #3498db;
    border-radius: 10px;
    padding: 40px;
    text-align: center;
    background: #f8fafc;
    margin-bottom: 30px;
    cursor: pointer;
    transition: all 0.3s;
}

.upload-area:hover, .upload-area.dragover {
    background: #e8f4fc;
    border-color: #2980b9;
}

.upload-icon {
    font-size: 60px;
    color: #3498db;
    margin-bottom: 20px;
}

.file-item {
    display: flex;
    align-items: center;
    padding: 15px;
    border-bottom: 1px solid #eee;
    transition: background 0.3s;
}

.file-item:hover {
    background: #f9f9f9;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: #eee;
    border-radius: 10px;
    margin-top: 20px;
    overflow: hidden;
    display: none;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #3498db, #2ecc71);
    width: 0%;
    transition: width 0.3s;
}

/* 文件类型颜色 */
.fa-file-pdf { color: #e74c3c; }
.fa-file-image { color: #2ecc71; }
.fa-file-word { color: #3498db; }
.fa-file-excel { color: #27ae60; }
.fa-file-powerpoint { color: #e67e22; }
.fa-file-archive { color: #f39c12; }
.fa-file-video { color: #9b59b6; }
.fa-file-audio { color: #1abc9c; }
.fa-file-text { color: #95a5a6; }