/* ===== 重置与基础 ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* 确保 hidden 属性始终生效，防止被 display:flex 等覆盖 */
[hidden] {
    display: none !important;
}

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
    --bg: #f0f2f5;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --text-lighter: #94a3b8;
    --border: #e2e8f0;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
    --transition: all 0.25s ease;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
                 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Header ===== */
.app-header {
    background: var(--gradient-2);
    color: #fff;
    padding: 2rem 1rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.header-inner {
    max-width: 900px;
    margin: 0 auto;
}

.app-title {
    font-size: 1.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.logo-icon {
    font-size: 2rem;
}

.app-subtitle {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    opacity: 0.9;
    font-weight: 400;
}

/* ===== Container ===== */
.container {
    flex: 1;
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    padding: 1.5rem 1rem;
}

/* ===== Tabs ===== */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    overflow-x: auto;
    padding-bottom: 0.25rem;
    -webkit-overflow-scrolling: touch;
}

.tabs::-webkit-scrollbar {
    height: 4px;
}
.tabs::-webkit-scrollbar-thumb {
    background: var(--text-lighter);
    border-radius: 2px;
}

.tab {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.7rem 1.1rem;
    background: var(--card-bg);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-light);
    cursor: pointer;
    white-space: nowrap;
    transition: border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

.tab:hover:not(.active) {
    border-color: var(--primary-light);
    color: var(--primary);
}

.tab.active,
.tab.active:hover {
    background: var(--gradient-2);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.tab-icon {
    font-size: 1.1rem;
}

/* ===== Panels ===== */
.panel {
    display: none;
    animation: fadeIn 0.3s ease;
}

.panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.panel-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.panel-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.panel-desc {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

/* ===== Upload Zone ===== */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 2.5rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: #fafbfc;
}

.upload-zone:hover {
    border-color: var(--primary-light);
    background: #f5f3ff;
}

.upload-zone.dragover {
    border-color: var(--primary);
    background: #ede9fe;
    transform: scale(1.01);
}

.upload-zone.compact {
    padding: 1.5rem 0.5rem;
}

.upload-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 0.5rem;
}

.upload-text {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 0.25rem;
}

.upload-text-sm {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
}

.upload-hint {
    font-size: 0.75rem;
    color: var(--text-lighter);
}

.upload-hint-sm {
    font-size: 0.7rem;
    color: var(--text-lighter);
    margin-top: 0.15rem;
}

/* ===== Dual Upload ===== */
.dual-upload {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

/* ===== File Preview ===== */
.file-preview {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: var(--radius-sm);
    margin-top: 0.75rem;
    font-size: 0.875rem;
}

.file-preview.compact {
    flex: 1;
}

.file-preview.has-error {
    background: #fef2f2;
    border-color: #fecaca;
}

.preview-icon {
    font-size: 1.5rem;
}

.preview-name {
    flex: 1;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.preview-size {
    color: var(--text-lighter);
    font-size: 0.75rem;
    white-space: nowrap;
}

.preview-remove {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-lighter);
    padding: 0 0.25rem;
    line-height: 1;
}

.preview-remove:hover {
    color: var(--error);
}

.file-previews {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.file-previews .file-preview {
    margin-top: 0;
    flex: 1;
}

/* ===== Options ===== */
.options, .options-row {
    margin: 1.25rem 0;
}

.options-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.option-group {
    flex: 1;
    min-width: 120px;
}

.option-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.option-hint {
    margin-top: 0.4rem;
    font-size: 0.72rem;
    color: var(--text-light);
    line-height: 1.5;
}

.option-hint code {
    padding: 1px 5px;
    background: var(--bg-muted, #f0f0f0);
    border-radius: 3px;
    font-size: 0.72rem;
}

.option-input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    transition: var(--transition);
}

.option-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.format-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.format-btn {
    padding: 0.4rem 0.85rem;
    background: #f1f5f9;
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
}

.format-btn:hover {
    border-color: var(--primary-light);
    color: var(--primary);
}

.format-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.format-btn:disabled,
.format-btn[disabled] {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* ===== Buttons ===== */
.btn-primary {
    width: 100%;
    padding: 0.85rem;
    background: var(--gradient-2);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

/* ===== Result ===== */
.result {
    margin-top: 1.25rem;
    padding: 1.25rem;
    border-radius: var(--radius-sm);
    text-align: center;
}

.result.success {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
}

.result.error {
    background: #fef2f2;
    border: 1px solid #fecaca;
}

.result-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.result-message {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.result.success .result-message {
    color: var(--success);
}

.result.error .result-message {
    color: var(--error);
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.5rem;
    background: var(--success);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
}

.btn-download:hover {
    background: #059669;
    transform: translateY(-1px);
}

/* ===== Loading Overlay ===== */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.loading-box {
    background: #fff;
    padding: 2rem 2.5rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow-lg);
    max-width: 320px;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid #e2e8f0;
    border-top-color: var(--primary);
    border-radius: 50%;
    margin: 0 auto 1rem;
    animation: spin 0.8s linear infinite;
}

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

.loading-text {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.loading-hint {
    font-size: 0.75rem;
    color: var(--text-lighter);
}

.btn-cancel-loading {
    margin-top: 1rem;
    padding: 0.4rem 1.5rem;
    font-size: 0.8rem;
    color: var(--text-light);
    background: transparent;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-cancel-loading:hover {
    color: #ef4444;
    border-color: #ef4444;
    background: #fef2f2;
}

.loading-progress-wrap {
    margin: 0.75rem 0 0.5rem;
}

.loading-progress-bar {
    width: 240px;
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
}

.loading-progress-fill {
    height: 100%;
    background: var(--gradient-2);
    border-radius: 4px;
    width: 0%;
    transition: width 0.3s ease;
}

.loading-progress-text {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary);
    margin-top: 0.4rem;
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    box-shadow: var(--shadow-lg);
    z-index: 1100;
    opacity: 0;
    transition: all 0.3s ease;
    pointer-events: none;
    max-width: 90%;
    text-align: center;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

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

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

/* ===== Footer ===== */
.app-footer {
    text-align: center;
    padding: 1.5rem 1rem;
    color: var(--text-lighter);
    font-size: 0.75rem;
    line-height: 1.6;
}

/* QQ群推广区块 */
.qq-group-promo {
    margin: 1rem auto;
    padding: 0.8rem 1.2rem;
    max-width: 500px;
    background: linear-gradient(135deg, #eef2ff, #f0fdf4);
    border: 1px solid #c7d2fe;
    border-radius: 10px;
}

.qq-group-promo .qq-group-text {
    font-size: 0.85rem;
    color: var(--text);
    margin: 0.2rem 0;
}

.qq-group-promo strong {
    color: #4f46e5;
    font-size: 1rem;
}

/* SEO 内容区（视觉上低调但搜索引擎可抓取） */
.seo-content {
    max-width: 800px;
    margin: 2rem auto 0;
    padding: 1.5rem;
    text-align: left;
    background: #f8fafc;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    line-height: 1.8;
    color: var(--text-light);
}

.seo-content h2 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.seo-content h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
    margin: 1rem 0 0.4rem;
}

.seo-content ul {
    list-style: none;
    padding: 0;
}

.seo-content ul li {
    padding: 0.3rem 0;
    border-bottom: 1px dashed var(--border);
}

.seo-content ul li:last-child {
    border-bottom: none;
}

.seo-content strong {
    color: var(--text);
}

.seo-content p {
    margin-bottom: 0.4rem;
}

/* ===== 响应式 ===== */
@media (max-width: 640px) {
    .app-title {
        font-size: 1.35rem;
    }

    .app-subtitle {
        font-size: 0.75rem;
    }

    .container {
        padding: 1rem 0.75rem;
    }

    .panel-card {
        padding: 1.25rem;
    }

    .tab {
        padding: 0.6rem 0.85rem;
        font-size: 0.75rem;
    }

    .tab-icon {
        font-size: 1rem;
    }

    .upload-zone {
        padding: 2rem 1rem;
    }

    .upload-icon {
        font-size: 2rem;
    }

    .options-row {
        flex-direction: column;
    }

    .dual-upload {
        grid-template-columns: 1fr;
    }

    .format-btn {
        padding: 0.35rem 0.7rem;
        font-size: 0.75rem;
    }
}

@media (max-width: 380px) {
    .tab span:not(.tab-icon) {
        display: none;
    }

    .tab {
        padding: 0.6rem;
    }
}

/* ===== 结果操作区（下载 + 存入U盘） ===== */
.result-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-usb {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.5rem;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-usb:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* ===== U盘选择面板 ===== */
.usb-panel {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--border);
    text-align: left;
}

.usb-loading {
    text-align: center;
    color: var(--text-light);
    font-size: 0.85rem;
    padding: 1rem;
}

.usb-empty {
    text-align: center;
    color: var(--warning);
    font-size: 0.85rem;
    padding: 1rem;
    background: #fffbeb;
    border-radius: var(--radius-sm);
}

.usb-refresh, .usb-retry {
    color: var(--primary);
    cursor: pointer;
    text-decoration: underline;
    font-weight: 600;
}

.usb-hint {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.usb-subfolder {
    margin-bottom: 0.75rem;
}

.usb-subfolder label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.usb-subfolder-input {
    width: 100%;
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    transition: var(--transition);
}

.usb-subfolder-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.usb-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.usb-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.usb-item:hover {
    background: #ede9fe;
    border-color: var(--primary-light);
    transform: translateX(2px);
}

.usb-item-icon {
    font-size: 1.5rem;
}

.usb-item-info {
    flex: 1;
    min-width: 0;
}

.usb-item-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.usb-item-space {
    font-size: 0.7rem;
    color: var(--text-lighter);
    margin-top: 0.15rem;
}

.usb-success {
    padding: 0.85rem;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--success);
    text-align: center;
}

.usb-success .usb-path {
    display: block;
    margin-top: 0.4rem;
    color: var(--text-light);
    font-size: 0.72rem;
    word-break: break-all;
}

.usb-error {
    padding: 0.85rem;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--error);
    text-align: center;
}

/* ===== 二维码直传模态框 ===== */
.qr-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1200;
    backdrop-filter: blur(4px);
    padding: 1rem;
}

.qr-modal-box {
    background: #fff;
    border-radius: var(--radius);
    padding: 2rem 1.75rem 1.5rem;
    box-shadow: var(--shadow-lg);
    max-width: 360px;
    width: 100%;
    text-align: center;
    position: relative;
    animation: fadeIn 0.25s ease;
}

.qr-modal-close {
    position: absolute;
    top: 0.5rem;
    right: 0.75rem;
    background: none;
    border: none;
    font-size: 1.6rem;
    line-height: 1;
    cursor: pointer;
    color: var(--text-lighter);
    transition: var(--transition);
}

.qr-modal-close:hover {
    color: var(--text);
}

.qr-modal-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
}

.qr-modal-desc {
    font-size: 0.8rem;
    color: var(--text-light);
    line-height: 1.5;
    margin-bottom: 1.25rem;
}

.qr-image-wrap {
    display: flex;
    justify-content: center;
    margin-bottom: 1rem;
}

.qr-image {
    width: 220px;
    height: 220px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px;
    background: #fff;
}

.qr-image-wrap.loading::after {
    content: '生成中...';
    display: block;
    color: var(--text-lighter);
    font-size: 0.85rem;
    padding: 6rem 0;
}

.qr-url-tip {
    font-size: 0.72rem;
    color: var(--text-lighter);
    word-break: break-all;
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.qr-wifi-hint {
    font-size: 0.78rem;
    color: var(--warning);
    background: #fffbeb;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
}

/* 扫码按钮 */
.btn-scan {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.5rem;
    background: #10b981;
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-scan:hover {
    background: #059669;
    transform: translateY(-1px);
}

/* ===== 下载位置提示（折叠面板） ===== */
.qr-tips {
    margin-top: 1rem;
    text-align: left;
    border-top: 1px dashed var(--border);
    padding-top: 0.75rem;
}

.qr-tips-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: none;
    border: none;
    font-size: 0.8rem;
    color: var(--primary);
    cursor: pointer;
    padding: 0.25rem 0;
    font-weight: 600;
    transition: var(--transition);
}

.qr-tips-toggle:hover {
    color: var(--primary-dark);
}

.qr-tips-arrow {
    transition: transform 0.2s ease;
    font-size: 0.7rem;
}

.qr-tips-toggle.open .qr-tips-arrow {
    transform: rotate(180deg);
}

.qr-tips-body {
    margin-top: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    animation: fadeIn 0.2s ease;
}

.qr-tip-item {
    padding: 0.65rem 0.75rem;
    background: #f8fafc;
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary-light);
}

.qr-tip-item.qr-tip-recommend {
    background: #f0fdf4;
    border-left-color: var(--success);
}

.qr-tip-label {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.3rem;
}

.qr-tip-content {
    font-size: 0.75rem;
    color: var(--text-light);
    line-height: 1.6;
}

.qr-tip-content code {
    display: inline-block;
    background: #e2e8f0;
    color: var(--text);
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-family: 'SF Mono', Consolas, monospace;
    word-break: break-all;
}

.qr-tip-warn {
    color: var(--error);
    font-weight: 700;
}

.qr-tip-hint {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-lighter);
    font-size: 0.7rem;
}

/* ===== 去除图片背景：背景色选择器 ===== */
.bg-color-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.bg-color-input {
    width: 40px;
    height: 36px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: none;
}

.bg-color-input:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.bg-color-text {
    flex: 1;
    min-width: 120px;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-family: 'SF Mono', Consolas, monospace;
    transition: var(--transition);
}

.bg-color-text:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    background: #f1f5f9;
}

.bg-color-text:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.bg-color-enable {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.8rem;
    color: var(--text-light);
    cursor: pointer;
    white-space: nowrap;
}

.bg-color-enable input {
    cursor: pointer;
}

/* ===== 去水印：框选画布 ===== */
.wm-canvas-area {
    margin: 1rem 0;
    padding: 1rem;
    background: #1a1a2e;
    border-radius: var(--radius-sm);
}

.wm-canvas-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.wm-hint-text {
    color: #cbd5e1;
    font-size: 0.8rem;
    font-weight: 500;
}

.wm-timeline {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.wm-timeline-label {
    color: #94a3b8;
    font-size: 0.75rem;
}

.wm-timeline-input {
    width: 120px;
    cursor: pointer;
}

.wm-reframe-btn {
    padding: 0.3rem 0.7rem;
    background: #475569;
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.wm-reframe-btn:hover {
    background: #64748b;
}

.wm-canvas-wrap {
    display: flex;
    justify-content: center;
    background: #0f0f1a;
    border-radius: var(--radius-sm);
    overflow: auto;
    max-height: 420px;
}

.wm-canvas {
    cursor: crosshair;
    display: block;
    max-width: 100%;
}

.wm-regions-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.75rem;
    color: #cbd5e1;
    font-size: 0.8rem;
}

.wm-regions-count {
    font-weight: 600;
}

.wm-clear-btn {
    padding: 0.3rem 0.8rem;
    background: #dc2626;
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.wm-clear-btn:hover {
    background: #b91c1c;
}

/* ===== 去字幕轨 ===== */
.subtitle-result {
    margin: 1rem 0;
}

.subtitle-info {
    padding: 1rem;
    border-radius: var(--radius-sm);
    text-align: center;
}

.subtitle-info.found {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
}

.subtitle-info.notfound {
    background: #fffbeb;
    border: 1px solid #fde68a;
}

.subtitle-info-icon {
    font-size: 1.5rem;
    margin-bottom: 0.4rem;
}

.subtitle-info-title {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
}

.subtitle-info.found .subtitle-info-title {
    color: var(--success);
}

.subtitle-info.notfound .subtitle-info-title {
    color: var(--warning);
}

.subtitle-info-desc {
    font-size: 0.8rem;
    color: var(--text-light);
}

.subtitle-track-list {
    margin-top: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.subtitle-track-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
}

.subtitle-track-item:hover {
    background: #ede9fe;
    border-color: var(--primary-light);
}

.subtitle-track-item.selected {
    background: #fef2f2;
    border-color: var(--error);
}

.subtitle-track-item input[type="checkbox"] {
    cursor: pointer;
}

.subtitle-track-info {
    flex: 1;
}

.subtitle-track-name {
    font-weight: 600;
}

.subtitle-track-meta {
    font-size: 0.72rem;
    color: var(--text-lighter);
}

.subtitle-options {
    margin-top: 1rem;
}

/* ===== 媒体信息查看 ===== */
.media-info-result {
    margin-top: 1rem;
}

.media-info-section {
    margin-bottom: 1rem;
}

.media-info-section-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
    padding-bottom: 0.3rem;
    border-bottom: 2px solid var(--primary-light);
}

.media-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.5rem;
}

.media-info-item {
    padding: 0.6rem 0.75rem;
    background: #f8fafc;
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary-light);
}

.media-info-label {
    font-size: 0.72rem;
    color: var(--text-lighter);
    margin-bottom: 0.15rem;
}

.media-info-value {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
}