.options-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.1rem;
    margin-bottom: 1rem;
    padding: 0.8rem 1rem;
    background: var(--feature-card-bg);
    border: 1px solid var(--input-border);
    border-radius: 10px;
}

.option-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-color);
    user-select: none;
    white-space: nowrap;
}

.option-label input[type="range"] {
    width: 90px;
    accent-color: #00dbde;
    cursor: pointer;
}

.option-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: #00dbde;
    cursor: pointer;
}

.option-label input[type="color"] {
    width: 36px;
    height: 26px;
    border: 1px solid var(--input-border);
    border-radius: 6px;
    padding: 0;
    background: var(--input-bg);
    cursor: pointer;
}

.option-label span {
    min-width: 2.5ch;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.file-open-bar {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-bottom: 1.25rem;
}

.file-open-bar .toolbar-hint {
    font-size: 0.82rem;
    color: var(--text-color);
    opacity: 0.6;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

/* 每文件一张卡片 */
.file-card {
    background: var(--feature-card-bg);
    border: 1px solid var(--input-border);
    border-radius: 10px;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-bottom: 0.9rem;
}

.card-header h2 {
    margin: 0;
    font-size: 1.05rem;
    color: var(--text-color);
    word-break: break-all;
}

.card-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.remove-file {
    background: transparent;
    border: 1px solid var(--input-border);
    color: var(--text-color);
    border-radius: 6px;
    width: 30px;
    height: 30px;
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
    transition: all 0.25s ease;
}

.remove-file:hover {
    background: rgba(220, 53, 69, 0.15);
    border-color: #dc3545;
    color: #dc3545;
}

/* 原图 + 检测框区域 */
.src-area {
    display: flex;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
    padding: 0.9rem 1rem;
    background: var(--feature-card-bg);
    border: 1px dashed var(--input-border);
    border-radius: 10px;
    align-items: flex-start;
    flex-wrap: wrap;
}

.src-left {
    flex: 0 0 auto;
}

.box-canvas {
    max-width: 100%;
    display: block;
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.10);
}

/* 方向调整按钮组（逆时针旋转 / 左右镜像 / 上下翻转 / 复位） */
.src-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.7rem;
    width: 520px;
    max-width: 100%;
    box-sizing: border-box;
}

.src-control-btn {
    flex: 1 1 auto;
    min-width: fit-content;
    white-space: nowrap;
}

.src-control-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
}

.src-right {
    flex: 1 1 220px;
    min-width: 220px;
}

.src-status {
    font-size: 0.95rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
    font-variant-numeric: tabular-nums;
}

.src-hint {
    font-size: 0.82rem;
    color: var(--text-color);
    opacity: 0.6;
    line-height: 1.6;
}

.editor-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.editor-pane,
.preview-pane {
    display: flex;
    flex-direction: column;
    background: var(--feature-card-bg);
    border-radius: 10px;
    border: 1px solid var(--input-border);
    padding: 1rem 1.25rem;
}

.editor-pane h3,
.preview-pane h3 {
    margin: 0 0 0.75rem;
    font-size: 0.95rem;
    color: var(--text-color);
    opacity: 0.75;
}

.mdEditor {
    flex: 1;
    min-height: 420px;
    resize: vertical;
    width: 100%;
    box-sizing: border-box;
    padding: 0.9rem 1rem;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--input-text);
    font-family: "Sarasa Fixed SC", "Sarasa Mono SC", "Noto Sans Mono CJK SC", "NSimSun", Consolas, "Courier New", monospace;
    font-size: 15px;
    line-height: 1.6;
    white-space: pre;
    overflow-wrap: normal;
    tab-size: 4;
}

.mdEditor:focus {
    outline: none;
    border-color: #00dbde;
}

.image-box {
    position: relative;
    flex: 1;
    min-height: 420px;
    background: repeating-conic-gradient(#ccc 0% 25%, #fff 0% 50%) 50% / 16px 16px;
    border-radius: 10px;
    border: 1px solid var(--input-border);
    overflow: auto;
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 1rem;
}

.image-box canvas {
    max-width: 100%;
    display: block;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.pane-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.count-info {
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.7;
    font-variant-numeric: tabular-nums;
}

.btn.secondary {
    padding: 9px 14px;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

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

.btn.primary {
    padding: 9px 14px;
    background-color: #00b3c4;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn.primary:hover {
    background-color: #0099aa;
    transform: translateY(-2px);
}

.btn.primary:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

.btn.small {
    padding: 6px 12px;
    font-size: 13px;
}

.action-bar {
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.action-bar[hidden] {
    display: none;
}

.action-btn {
    padding: 10px 26px;
    font-size: 14px;
}

/* ============ Loading 遮罩 ============ */
.loader-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(4px);
    padding: 1.25rem;
}

.loader-overlay.active {
    display: flex;
}

.loader-box {
    max-width: 560px;
    width: 100%;
    padding: 1.75rem 2rem;
    background: var(--feature-card-bg);
    border: 1px solid var(--input-border);
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

.loader-spinner {
    width: 52px;
    height: 52px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    border: 4px solid var(--input-border);
    border-top-color: #00dbde;
    animation: spin 0.9s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loader-title {
    margin: 0 0 0.4rem;
    font-size: 1.15rem;
    color: var(--text-color);
}

.loader-sub {
    margin: 0 0 1.1rem;
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.65;
}

.loader-info {
    text-align: left;
    margin-bottom: 1.1rem;
    border: 1px solid var(--input-border);
    border-radius: 10px;
    overflow: hidden;
}

.info-row {
    display: flex;
    gap: 0.6rem;
    padding: 0.55rem 0.8rem;
    border-bottom: 1px solid var(--input-border);
    font-size: 0.85rem;
}

.info-row:last-child {
    border-bottom: none;
}

.info-tag {
    flex: 0 0 auto;
    background: rgba(0, 219, 222, 0.15);
    color: #00a9b9;
    border-radius: 6px;
    padding: 0.1rem 0.55rem;
    height: fit-content;
    white-space: nowrap;
}

.info-text {
    color: var(--text-color);
    line-height: 1.55;
}

.loader-progress {
    margin-bottom: 1rem;
}

.loader-bar {
    height: 8px;
    border-radius: 4px;
    background: var(--input-border);
    overflow: hidden;
}

.loader-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #00dbde, #0099aa);
    border-radius: 4px;
    transition: width 0.35s ease;
}

.loader-phase {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.7;
}

.loader-error {
    margin-top: 0.6rem;
    font-size: 0.85rem;
    color: #dc3545;
}

@media (max-width: 900px) {
    .editor-layout {
        grid-template-columns: 1fr;
    }
}