/* 全局变量 */
:root {
    --primary-color: #4A90E2;
    --secondary-color: #2C3E50;
    --success-color: #27AE60;
    --danger-color: #E74C3C;
    --warning-color: #F39C12;
    --light-gray: #F5F6FA;
    --border-color: #E1E8ED;
    --text-color: #2C3E50;
    --text-light: #7F8C8D;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-gray);
}

/* 头部样式 */
header {
    background: linear-gradient(135deg, var(--primary-color), #2980B9);
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow-md);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.title h2 {
    font-size: 1.5rem;
    margin-bottom: 0.3rem;
}

.title h3 {
    font-size: 1rem;
    opacity: 0.9;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.main-nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
    background-color: rgba(255, 255, 255, 0.1);
}

/* 主要内容区域 */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* 上传区域样式 */
.upload-section {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
}

.section-header {
    margin-bottom: 1.5rem;
}

.section-header h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-light);
    font-size: 0.9rem;
}

.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.drop-zone:hover {
    border-color: var(--primary-color);
    background-color: rgba(74, 144, 226, 0.05);
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.drop-zone-content i {
    font-size: 3rem;
    color: var(--primary-color);
}

.drop-zone-content p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* 图片预览区域 */
.image-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.image-card {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.image-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.image-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.image-card .remove-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: rgba(231, 76, 60, 0.9);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.image-card .remove-btn:hover {
    background: var(--danger-color);
}

/* 按钮样式 */
.action-buttons {
    display: flex;
    gap: 1rem;
    margin: 1rem 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #357ABD;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #243342;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #C0392B;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* 表单样式 */
.patient-info {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

/* 进度条样式 */
.progress-section {
    margin: 2rem 0;
}

.progress-container {
    background: var(--light-gray);
    border-radius: 4px;
    padding: 1rem;
}

.progress-bar {
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress {
    height: 100%;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    color: var(--text-light);
}

/* 结果区域样式 */
.result-section {
    margin-top: 2rem;
    padding: 2rem;
    background-color: var(--light-gray);
    border-radius: 8px;
}

.analysis-result {
    white-space: pre-wrap;
    line-height: 1.8;
    padding: 1rem;
    background: white;
    border-radius: 4px;
    box-shadow: var(--shadow-sm);
}

/* 页脚样式 */
footer {
    background-color: white;
    padding: 2rem 0;
    margin-top: 4rem;
    box-shadow: var(--shadow-md);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-info p {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* 加载动画 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-content {
    text-align: center;
}

.loading-content i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 1rem;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }

    .btn {
        width: 100%;
    }
}