* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin: 30px 0;
}

header h1 {
    font-size: 2.2rem;
    color: #2c3e50;
    margin-bottom: 10px;
}

header p {
    color: #7f8c8d;
    font-size: 1.1rem;
}

/* 上传区域 */
.upload-container {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    padding: 30px;
    margin-bottom: 30px;
}

.upload-area {
    border: 2px dashed #3498db;
    border-radius: 8px;
    padding: 60px 20px;
    text-align: center;
    margin-bottom: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-area.active {
    border-color: #2ecc71;
    background-color: #f8fff8;
}

.upload-hint icon {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 15px;
    display: block;
}

.upload-hint p {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: 10px;
}

.upload-hint .tip {
    font-size: 0.9rem;
    color: #999;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: #3498db;
    color: #fff;
}

.btn-primary:hover {
    background-color: #2980b9;
}

/* 上传选项 */
.upload-options {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
    align-items: center;
}

.option-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.option-item label {
    font-size: 1rem;
    color: #555;
}

.option-item select, .option-item input {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.option-item input {
    width: 200px;
}

/* 进度条 */
.progress-container {
    margin: 20px 0;
}

.progress-title {
    font-size: 1rem;
    color: #555;
    margin-bottom: 8px;
}

.progress-bar {
    height: 10px;
    background-color: #eee;
    border-radius: 5px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: #2ecc71;
    transition: width 0.3s ease;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 0.9rem;
    color: #777;
}

/* 结果容器 */
.result-container {
    padding: 20px;
    border-radius: 8px;
    background-color: #f8f9fa;
}

.result-container h3 {
    color: #2ecc71;
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.result-item {
    margin-bottom: 10px;
    font-size: 1rem;
}

.result-item strong {
    color: #333;
}

.share-link {
    display: flex;
    gap: 10px;
    margin: 15px 0;
}

.share-link input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 下载页面 */
.download-container {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    padding: 30px;
    margin-bottom: 30px;
}

.file-info {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.file-info p {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: #555;
}

.password-form {
    max-width: 400px;
    margin: 0 auto;
}

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

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
}

.error {
    color: #e74c3c;
    margin-bottom: 15px;
    text-align: center;
}

.error-container {
    text-align: center;
    padding: 50px 20px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}

.error-container h2 {
    color: #e74c3c;
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.error-container p {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: 30px;
}

footer {
    text-align: center;
    color: #999;
    font-size: 0.9rem;
    margin-top: 50px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .upload-options {
        flex-direction: column;
        align-items: flex-start;
    }

    .option-item input {
        width: 100%;
    }

    .share-link {
        flex-direction: column;
    }
}