body {
        font-family: 'Roboto', Arial, sans-serif;
        margin: 0;
        padding: 0;
        background: var(--bg, #f4f4f4);
        color: var(--text, #222);
        transition: background 0.3s, color 0.3s;
    }
    a{
        font-family: 'Roboto', Arial, sans-serif;
        color: var(--text, #222);
        transition: background 0.3s, color 0.1s;
        text-decoration: none;
    }
    a:hover{
    color: #ff0a0aff;
    }
    .container {
        max-width: 700px;
        margin: 2rem auto;
        background: var(--card, #fff);
        border-radius: 12px;
        box-shadow: 0 2px 16px rgba(0,0,0,0.07);
        padding: 2rem;
    }
    h1, h3 {
        margin-top: 0;
        font-weight: 700;
    }
    form {
        margin-bottom: 1.5rem;
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
        align-items: center;
    }
    input[type="text"], input[type="file"] {
        flex: 1 1 200px;
        padding: 0.5rem;
        border-radius: 6px;
        border: 1px solid #ccc;
    }
    button, input[type="submit"] {
        padding: 0.5rem 1.2rem;
        border-radius: 6px;
        border: none;
        background: var(--primary, #007bff);
        color: #fff;
        cursor: pointer;
        font-weight: 700;
        transition: background 0.2s;
    }
    button:hover, input[type="submit"]:hover {
        background: var(--primary-dark, #0056b3);
    }
    input#delbtn{
    background: #ff0a0aff;
    }
    input#delbtn:hover{
    background: #cc0808ff;
    }
    .mode-toggle {
        float: right;
        margin-top: -1.5rem;
        margin-bottom: 1rem;
        background: var(--primary, #007bff);
        color: #fff;
        border: none;
        border-radius: 20px;
        padding: 0.3rem 1rem;
        cursor: pointer;
        font-size: 0.7rem;
    }
    ul#fileList {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    ul#fileList li {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.7rem 0.5rem;
        border-bottom: 1px solid #6d6d6dff;
        font-size: 1.05rem;
        flex-wrap: wrap;
    }

    .file-link {
        max-width: 220px;
        min-width: 80px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        display: inline-block;
        vertical-align: middle;
    }

    .file-info {
        display: flex;
        gap: 2.5rem;
        min-width: 220px;
        justify-content: flex-end;
        font-size: 0.98em;
        color: #888;
    }
    .file-info span:first-child {
        display: inline-block;
        width: 80px;   /* 文件大小宽度，可根据实际调整 */
        text-align: right;
    }
    .file-info span:last-child {
        display: inline-block;
        width: 120px;  /* 时间宽度，可根据实际调整 */
        text-align: right;
    }
    button#modeBtn {
    background: border-box;
    border-block-color: var(--text, #222);
    color: var(--text, #222);
    border: thin;
    border-style: solid;}

    @media (max-width: 600px) {
        .container {
            padding: 1rem;
        }
        ul#fileList li {
            flex-direction: column;
            align-items: flex-start;
            gap: 0.3rem;
        }
        .file-info {
            justify-content: flex-start;
            gap: 1.2rem;
            min-width: 0;
        }
        .mode-toggle {
            float: none;
            display: block;
            margin: 0 0 1rem 0;
        }
    }
    /* 夜间模式变量 */
    body.night {
        --bg: #181c23;
        --card: #232a34;
        --text: #e6e6e6;
        --primary: #4f8cff;
        --primary-dark: #2c5aa0;
    }