/* 样式保持不变，与原始代码相同 */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --accent: #0ea5e9;
    --light: #f8fafc;
    --dark: #1e293b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --border-radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
    background-color: var(--light);
    color: var(--gray-800);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo i {
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active {
    background-color: rgba(255, 255, 255, 0.15);
}

.auth-buttons {
    display: flex;
    gap: 10px;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid white;
    color: white;
}

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

/* 主内容区样式 */
.main-content {
    padding: 2rem 0;
}

.dashboard {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 2rem;
}

@media (max-width: 992px) {
    .dashboard {
        grid-template-columns: 1fr;
    }
}

.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 24px;
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--gray-200);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
}

/* 上传区域样式 */
.upload-area {
    border: 2px dashed var(--gray-300);
    border-radius: var(--border-radius);
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 20px;
}

.upload-area:hover {
    border-color: var(--primary);
    background-color: var(--gray-100);
}

.upload-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.upload-text {
    color: var(--gray-600);
    margin-bottom: 15px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: var(--gray-600);
}

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

.btn-success:hover {
    background-color: #0da271;
}

/* 按钮组样式 */
.button-group {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.button-group .btn {
    flex: 1;
}

/* 预览区域样式 */
.preview-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.preview-item {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.preview-item img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    display: block;
}

.preview-remove {
    position: absolute;
    top: 5px;
    right: 5px;
    background-color: var(--danger);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 12px;
}

/* 进度条样式 */
.progress-bar {
    height: 8px;
    background-color: var(--gray-200);
    border-radius: 4px;
    overflow: hidden;
    margin: 15px 0;
}

.progress {
    height: 100%;
    background-color: var(--primary);
    border-radius: 4px;
    width: 0%;
    transition: width 0.3s ease;
}

/* 示例图片区域 - 修改后的样式 */
.example-section {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.example-content {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

.example-image-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.example-image {
    width: 100%;
    max-width: 280px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.instructions {
    background-color: var(--gray-100);
    padding: 20px;
    border-radius: var(--border-radius);
    flex: 1;
    /* 调整拍摄指南区域的字体大小 */
    font-size: 15px; /* 增加基础字体大小 */
}

.instructions h3 {
    margin-bottom: 15px;
    color: var(--primary);
    font-size: 1.2rem; /* 增加标题字体大小 */
    border-bottom: 2px solid var(--primary);
    padding-bottom: 8px;
}

.instructions p {
    color: var(--gray-700);
    line-height: 1.6;
    margin-bottom: 12px; /* 增加段落间距 */
    font-size: 15px; /* 设置段落字体大小 */
}

.instructions ul {
    padding-left: 20px;
    color: var(--gray-700);
    margin-bottom: 12px;
}

.instructions li {
    margin-bottom: 10px; /* 增加列表项间距 */
    font-size: 14.5px; /* 设置列表字体大小 */
    line-height: 1.5;
}

.instructions strong {
    color: var(--primary-dark);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .example-content {
        flex-direction: column;
    }

    .navbar {
        flex-direction: column;
        gap: 15px;
    }

    .nav-links {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }

    .auth-buttons {
        width: 100%;
        justify-content: center;
    }

    .card {
        padding: 16px;
    }

    .button-group {
        flex-direction: column;
    }

    /* 移动端调整字体大小 */
    .instructions {
        font-size: 14px;
    }

    .instructions h3 {
        font-size: 1.1rem;
    }

    .instructions p, .instructions li {
        font-size: 14px;
    }
}

/* 页脚样式 */
footer {
    background-color: var(--gray-800);
    color: white;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-content {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 60px;
    padding: 0 5px;
}

.footer-section {
    flex: 1 1 220px;
    min-width: 220px;
    max-width: 280px;
    margin-bottom: 20px;
}

.footer-section h3 {
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.footer-bottom {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-700);
}

/* 标签样式 */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background-color: var(--success);
    color: white;
}

/* 消息提示样式 */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 15px 20px;
    background-color: var(--gray-800);
    color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1100;
}

.toast.show {
    opacity: 1;
}

.toast.success {
    background-color: var(--success);
}

.toast.error {
    background-color: var(--danger);
}

.toast.warning {
    background-color: #f59e0b;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    color: white;
}

.user-info i {
    font-size: 1.2rem;
}

/* 表格样式 */
.table-container {
    overflow-x: auto;
    margin: 20px 0;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

th {
    background-color: var(--gray-100);
    font-weight: 600;
    color: var(--gray-800);
}

tr:hover {
    background-color: var(--gray-100);
}

/* 数据库页面特定样式 */
.database-page .card {
    margin-bottom: 24px;
}

.database-page .btn {
    margin: 0;
}