/* ===== 工具区统一面板 ===== */
    .tools-area { display: none; }
    .tools-area.show { display: block; }
    .tool-panel { display: none; padding: 20px 0; }
    .tool-panel.active { display: block; }
    .tool-input {
        width: 100%;
        padding: 10px 14px;
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        font-size: 14px;
        margin-bottom: 12px;
        outline: none;
        transition: border-color 0.2s;
    }
    .tool-input:focus {
        border-color: var(--brand);
        box-shadow: 0 0 0 3px var(--brand-light);
    }
    .tool-textarea {
        width: 100%;
        padding: 10px 14px;
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        font-size: 14px;
        min-height: 120px;
        resize: vertical;
        outline: none;
        font-family: inherit;
    }
    .tool-textarea:focus {
        border-color: var(--brand);
        box-shadow: 0 0 0 3px var(--brand-light);
    }
    .tool-btn-group {
        display: flex;
        gap: 10px;
        margin-top: 12px;
        flex-wrap: wrap;
    }
    .tool-btn-group .btn { flex: 1; min-width: 100px; }
    .sub-tabs {
        display: flex;
        gap: 8px;
        margin-bottom: 16px;
        flex-wrap: wrap;
    }
    .sub-tab {
        padding: 6px 14px;
        border-radius: var(--radius-sm);
        font-size: 13px;
        cursor: pointer;
        border: 1px solid var(--border);
        background: white;
        color: var(--text-secondary);
        transition: all 0.2s;
    }
    .sub-tab:hover {
        border-color: var(--brand);
        color: var(--brand);
    }
    .sub-tab.active {
        background: var(--brand);
        color: white;
        border-color: var(--brand);
    }

/* ===== 文件列表 ===== */
    .file-list { margin-bottom: 16px; }
    .file-list-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 10px 14px;
        background: var(--bg);
        border-radius: var(--radius-sm);
        margin-bottom: 8px;
        border: 1px solid var(--border-light);
    }
    .file-list-item .name { font-size: 13px; color: var(--text); font-weight: 500; }
    .file-list-item .remove {
        color: var(--error);
        cursor: pointer;
        font-size: 16px;
        background: none;
        border: none;
    }

/* ===== 二维码 ===== */
    .qr-display { text-align: center; padding: 20px; }
    .qr-display img { max-width: 220px; border-radius: var(--radius-sm); }

/* ===== 反馈浮动按钮 ===== */
    .feedback-float-btn {
        position: fixed;
        bottom: 24px; right: 24px;
        width: 48px; height: 48px;
        border-radius: 50%;
        background: var(--brand);
        color: white;
        border: none;
        font-size: 20px;
        cursor: pointer;
        box-shadow: var(--shadow-lg);
        z-index: 50;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.2s;
    }
    .feedback-float-btn:hover {
        transform: scale(1.05);
        background: var(--brand-hover);
    }

/* ===== 多文件上传 ===== */
    .multi-upload-area {
        border: 2px dashed var(--border);
        border-radius: var(--radius-sm);
        padding: 24px;
        text-align: center;
        cursor: pointer;
        background: var(--bg);
        margin-bottom: 12px;
    }
    .multi-upload-area:hover {
        border-color: var(--brand);
        background: var(--brand-light);
    }