/* 引入自定义字体 */
        @font-face {
            font-family: 'CustomFont';
            src: url('/static/fonts/font.ttf') format('truetype');
        }
        body {
            font-family: 'CustomFont', sans-serif;
            letter-spacing: 1.5px; /* 全局字体间距 */
        }
        .image-card {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            border-radius: 0.5rem; /* 默认圆角 */
            overflow: hidden;
            background-color: white; /* 卡片背景颜色 */
        }
        .filename {
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 100px;
            font-size: 0.75rem; /* 更小的字体 */
            color: black; /* 卡片内字体颜色 */
            font-weight: bold; /* 加粗 */
        }
        .day-mode {
            background: linear-gradient(135deg, #f3f4f6, #e5e7eb); /* 默认背景 */
            color: #1e293b; /* 默认文字颜色 */
        }
        .day-mode .search-input {
            background-color: white; /* 默认背景 */
            color: #4c1d95; /* 深紫色文字 */
        }
        .day-mode .image-card {
            background-color: white; /* 默认背景 */
            color: #1e293b; /* 默认文字颜色 */
        }
        .night-mode {
            background: linear-gradient(135deg, #4c1d95, #2d3748); /* 较深的紫色 */
            color: #e9d8fd; /* 浅色文字 */
        }
        .night-mode .search-input {
            background-color: #e9d8fd; /* 较浅的紫色 */
            color: #4c1d95; /* 深紫色文字 */
        }
        .night-mode .image-card {
            background-color: #e9d8fd; /* 较浅的紫色 */
            color: #4c1d95; /* 较深的紫色 */
        }
        .night-mode .intro-text {
            color: #e9d8fd; /* 夜间模式介绍文字颜色 */
            font-weight: bold; /* 加粗 */
        }
        .night-mode .text-xl {
            color: #e9d8fd; /* 左上角logo夜间模式为浅色 */
        }
        .status-button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.3rem 0.8rem 0.3rem !important;
            border-radius: 1rem !important;
            background-color: #6b46c1; /* 紫色按钮 */
            color: white;
            font-weight: 500;
            margin: 0.25rem;
        }
        .feedback-button {
            background-color: #e53e3e; /* 红色按钮 */
            color: white;
            transition: background-color 0.3s ease;
        }
        .feedback-button:hover {
            background-color: #c53030; /* 悬停时颜色变深 */
        }
        .popup {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) scale(0);
            z-index: 1000;
            background-color: white;
            padding: 1rem;
            border-radius: 0.5rem;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
            transition: transform 0.3s ease;
            width: auto; /* 动态调整宽度 */
            max-width: 90%; /* 最大宽度 */
            max-height: 90%; /* 最大高度 */
        }
        .popup.active {
            transform: translate(-50%, -50%) scale(1);
        }
        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 999;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .overlay.active {
            opacity: 1;
        }
        .copy-success {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: #7e22ce;
            color: white;
            padding: 0.4rem 1rem 0.5rem 1rem;
            border-radius: 1.5rem;
            font-size: 0.875rem;
            font-weight: bold;
            z-index: 1001;
            opacity: 0;
            transition: opacity 0.3s ease;
            white-space: nowrap;
            max-width: 200px;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .copy-success.active {
            opacity: 1;
        }
        .fade-in {
            animation: fadeIn 0.5s ease; /* 加长动画时间 */
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
            }
            to {
                opacity: 1;
            }
        }
        .loading-spinner {
            border: 4px solid rgba(0, 0, 0, 0.1);
            border-left-color: #6b46c1;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            animation: spin 1s linear infinite;
        }
        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }
        /* 左上角图标按钮样式 */
        .icon-buttons {
            position: fixed;
            top: 0;
            left: 0;
            padding: 1rem;
            background-color: rgba(255, 255, 255, 0.75);
            border-bottom-right-radius: 0.5rem;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            z-index: 1000;
        }
        .icon-buttons a {
            color: #4a5568; /* 默认颜色 */
            transition: color 0.3s ease;
        }
        .icon-buttons a:hover {
            color: #6b46c1; /* 悬停颜色 */
        }
        /* 按钮内边距和圆角 */
        button {
            padding: 0.3rem 0.8rem 0.3rem !important;
            border-radius: 1rem !important;
        }
        /* .mb-6 的下外边距改为 1rem */
        .mb-6 {
            margin-bottom: 1rem !important;
        }
        
        /* 左上角图标大小改为 1rem */
        .fab, .fas {
            font-size: 1rem !important;
        }

        .night-mode footer {
            color: #e9d8fd; /* 夜间模式文字颜色 */
        }

        html, body {
            height: 100%;
            margin: 0;
            background-color: #f3f4f6; /* 设置背景颜色 */
        }
        body.day-mode {
            background: linear-gradient(135deg, #f3f4f6, #e5e7eb); /* 默认背景 */
        }
        body.night-mode {
            background: linear-gradient(135deg, #4c1d95, #2d3748); /* 夜间模式背景 */
        }

        /* 手机端隐藏按钮文字 */
        @media (max-width: 768px) {
            #check-update span,
            #toggle-mode span,
            #search-button span,
            #upload-button span,
            .category-button span {
                display: none;
            }
        }

        /* 图标卡片下方按钮样式 */
        .image-buttons {
            display: flex;
            justify-content: space-between;
            width: 100%;
            padding: 0.5rem;
        }
        .image-buttons button {
            background: none;
            border: none;
            cursor: pointer;
            color: #4a5568; /* 默认颜色 */
        }
        .image-buttons button:hover {
            color: #6b46c1; /* 悬停颜色 */
        }
        .image-buttons .delete-button {
            color: #ef4444; /* 红色 */
        }
        .image-buttons .delete-button:hover {
            color: #dc2626; /* 深红色 */
        }