* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    overflow-y: scroll;
    scrollbar-width: thin;
}

body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    background: transparent;
    color: #333;
    min-height: 100vh;
    width: 100%;
    overflow-x: hidden;
}

/* 容器样式 */
.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background: rgba(25, 25, 35, 0.2);
    backdrop-filter: blur(8px);
    border-radius: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 表单样式 */
.form-row {
    display: flex;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.form-group {
    flex: 1;
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: white;
}

.required::after {
    content: '*';
    color: #ff4d4d;
    margin-left: 4px;
}

input[type="text"],
input[type="number"],
input[type="email"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: rgba(135, 206, 235, 0.5);
    box-shadow: 0 0 10px rgba(135, 206, 235, 0.3);
}

textarea {
    height: 120px;
    resize: vertical;
}

/* 单选框和复选框样式 */
.radio-group,
.checkbox-group {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.radio-label,
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

/* 文件上传样式 */
input[type="file"] {
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    color: white;
}

.file-hint {
    font-size: 0.8em;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 0.5rem;
}

/* 提交按钮样式 */
.form-actions {
    text-align: center;
    margin-top: 2rem;
}

.submit-btn {
    padding: 1rem 3rem;
    background: rgba(135, 206, 235, 0.3);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.submit-btn:hover {
    background: rgba(135, 206, 235, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(135, 206, 235, 0.3);
}

#grade option {
    background-color: rgba(25, 35, 60, 0.9);
    color: white;
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .form-row {
        flex-direction: column;
        gap: 1rem;
    }
    
    .radio-group,
    .checkbox-group {
        flex-direction: column;
        gap: 0.8rem;
    }
    
    .container {
        margin: 2rem auto;
        padding: 1.5rem;
    }
}

@media screen and (max-width: 576px) {
    .container {
        padding: 1rem;
    }
}