/* 白色极简风格 (White Minimalist) 
   以空气感为先，通过大量留白和清晰字号、字重构建信息层级，
   绝对克制、温和对比、无杂乱装饰，兼具手机端极致舒适的排版与触控体验。
*/
:root {
    --bg: #fafafa;
    --surface: #ffffff;
    --text: #111827;
    --text-muted: #6b7280;
    --text-light: #9ca3af;
    --border: #e5e7eb;
    --border-strong: #d1d5db;
    --primary: #111827;
    --primary-fg: #ffffff;
    --success: #15803d;
    --success-bg: #f0fdf4;
    --danger: #b91c1c;
    --danger-bg: #fef2f2;
    --warn: #b45309;
    --warn-bg: #fffbeb;
    --info: #1d4ed8;
    --info-bg: #eff6ff;
    --radius: 8px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.04);
}

/* 优雅深色模式主题适配：基于柔和深灰蓝基底，保证高对比度与信息层级 */
[data-theme="dark"] {
    --bg: #0f1115;
    --surface: #181b21;
    --text: #f3f4f6;
    --text-muted: #9ca3af;
    --text-light: #6b7280;
    --border: #282d37;
    --border-strong: #3b4250;
    --primary: #f9fafb;
    --primary-fg: #111827;
    --success: #4ade80;
    --success-bg: rgba(74, 222, 128, 0.12);
    --danger: #f87171;
    --danger-bg: rgba(248, 113, 113, 0.12);
    --warn: #fbbf24;
    --warn-bg: rgba(251, 191, 36, 0.12);
    --info: #60a5fa;
    --info-bg: rgba(96, 165, 250, 0.12);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .data-table th {
    background: #1e222a;
    color: #9ca3af;
}

[data-theme="dark"] .master-qr-box,
[data-theme="dark"] .master-qr-container,
[data-theme="dark"] .existing-thumb,
[data-theme="dark"] .qr-row-thumb {
    background: #ffffff; /* 确保二维码白底可被精准扫出 */
}

[data-theme="dark"] input[type="text"],
[data-theme="dark"] input[type="number"],
[data-theme="dark"] input[type="password"],
[data-theme="dark"] input[type="date"],
[data-theme="dark"] select,
[data-theme="dark"] textarea {
    background: #14161c;
    border-color: #313744;
    color: #f3f4f6;
}

[data-theme="dark"] .dropzone {
    background: #14171d;
    border-color: #313744;
}

/* 主题切换开关组件 */
.theme-switch-group {
    display: inline-flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 20px;
    padding: 2px;
    border: 1px solid var(--border);
}
[data-theme="dark"] .theme-switch-group {
    background: rgba(255, 255, 255, 0.06);
}
.theme-switch-btn {
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 13px;
    padding: 4px 10px;
    border-radius: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s;
    line-height: 1;
}
.theme-switch-btn.active {
    background: var(--surface);
    color: var(--text);
    font-weight: 600;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1040px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 顶栏 */
.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 30;
}
.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
    gap: 12px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}
.brand h1 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -0.2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.back-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    white-space: nowrap;
    transition: color 0.15s;
}
.back-link:hover { color: var(--text); }
.topbar-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-shrink: 0;
}

/* 主容器 */
.main {
    padding-top: 24px;
    padding-bottom: 80px;
}
.list-head-summary {
    margin-bottom: 16px;
    font-size: 13px;
}

/* 按钮规范 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 14px;
    border: 1px solid var(--border-strong);
    background: var(--surface);
    color: var(--text);
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
    white-space: nowrap;
    min-height: 36px;
}
.btn:hover { background: #f3f4f6; border-color: #9ca3af; }
.btn-primary {
    background: var(--primary);
    color: var(--primary-fg);
    border-color: var(--primary);
}
.btn-primary:hover { background: #27272a; border-color: #27272a; color: #fff; }
.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border-strong);
}
.btn-secondary:hover { background: #f9fafb; border-color: #9ca3af; }
.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--text-muted);
}
.btn-ghost:hover { background: #f3f4f6; color: var(--text); }
.btn-danger {
    background: transparent;
    border-color: transparent;
    color: var(--danger);
}
.btn-danger:hover { background: var(--danger-bg); }
.btn-sm { padding: 4px 10px; font-size: 12px; min-height: 28px; }
.btn-lg { padding: 10px 20px; font-size: 14px; min-height: 42px; font-weight: 600; }
.btn-block { width: 100%; }

/* 提示条 */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 13px;
    border: 1px solid transparent;
}
.alert-success { background: var(--success-bg); color: var(--success); border-color: #bbf7d0; }
.alert-error { background: var(--danger-bg); color: var(--danger); border-color: #fecaca; }

/* 徽章 */
.badge {
    display: inline-flex;
    align-items: center;
    font-size: 11px;
    padding: 2px 7px;
    border-radius: 4px;
    white-space: nowrap;
    font-weight: 500;
    line-height: 1.4;
}
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-muted { background: #f3f4f6; color: var(--text-muted); }

/* 有效期倒计时徽章 */
.countdown {
    display: inline-flex;
    align-items: center;
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 4px;
    white-space: nowrap;
    font-weight: 600;
}
.countdown-ok { background: var(--success-bg); color: var(--success); }
.countdown-warning { background: var(--warn-bg); color: var(--warn); border: 1px solid #fde68a; }
.countdown-expired { background: var(--danger-bg); color: var(--danger); border: 1px solid #fecaca; }

/* 文本辅助 */
.muted { color: var(--text-muted); }
.required { color: var(--danger); margin-left: 2px; }

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 72px 20px;
    background: var(--surface);
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius);
}
.empty-icon { font-size: 40px; margin-bottom: 12px; }
.empty-state p { font-size: 15px; }
.empty-state .muted { font-size: 13px; margin-top: 6px; }

/* 卡片容器通用 */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    margin-bottom: 20px;
}

/* 活码列表卡片 */
.card-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.code-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 22px;
    display: flex;
    gap: 24px;
    align-items: flex-start;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.code-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
}
.code-card-main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.code-card-header {
    display: flex;
    align-items: baseline;
    gap: 10px;
    flex-wrap: wrap;
}
.code-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    word-break: break-all;
}
.badges-row {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.code-meta {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: #f9fafb;
    padding: 12px 14px;
    border-radius: 6px;
    border: 1px solid #f3f4f6;
}
.meta-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}
.meta-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.meta-label {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.meta-value {
    font-size: 13px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.link-value {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #ffffff;
    padding: 4px 8px;
    border-radius: 4px;
    border: 1px solid var(--border);
}
.link-text {
    font-family: ui-monospace, Menlo, Monaco, Consolas, monospace;
    font-size: 12px;
    color: var(--text);
    word-break: break-all;
    flex: 1;
    min-width: 0;
}

.code-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}
.btn-action {
    flex-shrink: 0;
}
.inline-form { display: inline; }

.code-card-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}
.master-qr-box {
    width: 104px;
    height: 104px;
    padding: 4px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #ffffff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}
.master-qr {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}
.qr-caption {
    font-size: 11px;
    color: var(--text-muted);
}

/* 统计页排版 */
.stats-header {
    margin-bottom: 20px;
}
.stats-title {
    font-size: 18px;
    font-weight: 600;
}
.stats-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}
.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.stat-label {
    font-size: 12px;
    color: var(--text-muted);
}
.stat-value {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.5px;
}
.stat-value.highlight { color: var(--info); }
.stat-unit {
    font-size: 12px;
    color: var(--text-muted);
}
.stat-flex {
    display: flex;
    align-items: center;
    gap: 8px;
}
.stat-value-text {
    font-size: 18px;
    font-weight: 600;
}

/* 筛选表单 */
.filter-card {
    padding: 18px 20px;
}
.filter-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.filter-inputs {
    display: flex;
    gap: 14px;
    align-items: flex-end;
    flex-wrap: wrap;
}
.filter-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.filter-group label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}
.filter-group input[type="date"] {
    padding: 6px 10px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    font-size: 13px;
    background: var(--surface);
    color: var(--text);
}
.filter-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}
.filter-quick {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    padding-top: 10px;
    border-top: 1px solid #f3f4f6;
}
.quick-label {
    font-size: 12px;
    color: var(--text-muted);
}
.export-btn {
    margin-left: auto;
}

/* 柱状图 */
.card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 8px;
}
.section-title {
    font-size: 15px;
    font-weight: 600;
}
.daily-chart {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.daily-bar {
    display: grid;
    grid-template-columns: 50px 1fr 60px;
    align-items: center;
    gap: 12px;
}
.daily-date {
    font-size: 12px;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}
.daily-track {
    height: 18px;
    background: #f3f4f6;
    border-radius: 4px;
    overflow: hidden;
    min-width: 0;
}
.daily-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    transition: width 0.3s ease;
}
.daily-count {
    font-size: 12px;
    font-weight: 600;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* 群码分流进度 */
.item-stats {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.item-stat {
    display: flex;
    gap: 12px;
    align-items: center;
}
.item-index {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    width: 24px;
    flex-shrink: 0;
}
.item-stat-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.item-stat-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    flex-wrap: wrap;
}
.progress-track {
    height: 7px;
    background: #f3f4f6;
    border-radius: 4px;
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    background: var(--info);
    border-radius: 4px;
    transition: width 0.3s ease;
}
.progress-fill.full { background: var(--warn); }

/* 表格 */
.table-container {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    text-align: left;
}
.data-table th, .data-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
.data-table th {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
    background: #f9fafb;
}

/* 表单样式 */
.form-card {
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding: 28px;
}
.form-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding-bottom: 24px;
    border-bottom: 1px solid #f3f4f6;
}
.form-section:last-of-type {
    border-bottom: none;
    padding-bottom: 0;
}
.form-section-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
}
.section-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.field label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
}
.field input[type="text"],
.field input[type="number"],
.field input[type="password"] {
    padding: 9px 12px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    font-size: 14px;
    background: var(--surface);
    color: var(--text);
    transition: border-color 0.15s;
    width: 100%;
}
.field input:focus {
    outline: none;
    border-color: var(--primary);
}
.help {
    font-size: 12px;
    color: var(--text-muted);
}
.form-actions {
    display: flex;
    gap: 12px;
    align-items: center;
    padding-top: 8px;
}

/* 颜色选择器联动 */
.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}
.color-picker-wrapper input[type="color"] {
    -webkit-appearance: none;
    border: 1px solid var(--border);
    width: 36px;
    height: 36px;
    border-radius: var(--radius);
    padding: 0;
    cursor: pointer;
    background: none;
}
.color-picker-wrapper input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 2px;
}
.color-picker-wrapper input[type="color"]::-webkit-color-swatch {
    border-radius: 4px;
    border: none;
}
.color-hex-input {
    width: 110px !important;
    font-family: ui-monospace, Menlo, Monaco, monospace;
    font-size: 13px !important;
    text-transform: uppercase;
}
.color-presets {
    display: flex;
    align-items: center;
    gap: 6px;
}
.preset-label {
    font-size: 12px;
    color: var(--text-muted);
}
.color-dot {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1px solid var(--border-strong);
    cursor: pointer;
    transition: transform 0.15s;
}
.color-dot:hover {
    transform: scale(1.15);
}

/* 轮询模式单选 */
.radio-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}
.radio-item {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
}
.radio-item:hover {
    border-color: var(--border-strong);
    background: #fcfcfc;
}
.radio-title {
    font-size: 13px;
    font-weight: 600;
}

/* 拖拽批量上传 Dropzone */
.dropzone {
    border: 2px dashed var(--border-strong);
    border-radius: var(--radius);
    background: #fafafa;
    padding: 28px 20px;
    text-align: center;
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
}
.dropzone:hover, .dropzone.drag-over {
    border-color: var(--primary);
    background: #f4f4f5;
}
.dropzone-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    pointer-events: none;
}
.dropzone-icon {
    color: var(--text-muted);
    margin-bottom: 4px;
}
.dropzone-text {
    font-size: 14px;
    color: var(--text);
}
.dropzone-sub {
    font-size: 12px;
    color: var(--text-muted);
}
.dropzone-file-input {
    display: none;
}

/* 群码配置列表 */
.qr-rows {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.qr-row {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #ffffff;
    box-shadow: 0 1px 2px rgba(0,0,0,0.02);
}
.qr-row-thumb {
    width: 68px;
    height: 68px;
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius);
    overflow: hidden;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fafafa;
    position: relative;
}
.preview-empty {
    font-size: 11px;
    color: var(--text-light);
    text-align: center;
    padding: 4px;
}
.row-preview {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: none;
}
.row-preview.show { display: block; }
.qr-row-fields {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.field-mini-label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}
.qr-row-file {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.file-loaded-badge {
    font-size: 12px;
    color: var(--success);
    background: var(--success-bg);
    padding: 3px 8px;
    border-radius: 4px;
    display: inline-block;
    align-self: flex-start;
}
.qr-row-threshold {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.qr-threshold {
    width: 110px !important;
    padding: 5px 8px !important;
    font-size: 13px !important;
}
.remove-row {
    color: var(--text-light);
    font-size: 16px;
    padding: 4px 8px;
}
.remove-row:hover { color: var(--danger); }
.qr-rows-actions {
    margin-top: 4px;
}

/* 已有群码列表（编辑页） */
.existing-items {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.existing-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fcfcfc;
}
.existing-thumb-wrapper {
    position: relative;
    width: 60px;
    height: 60px;
    flex-shrink: 0;
}
.existing-thumb {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: #fff;
}
.existing-idx {
    position: absolute;
    top: -4px;
    left: -4px;
    background: var(--primary);
    color: #fff;
    font-size: 10px;
    padding: 1px 4px;
    border-radius: 3px;
    font-weight: 600;
}
.existing-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.existing-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    font-size: 13px;
}
.existing-threshold {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
}
.input-sm {
    width: 90px !important;
    padding: 4px 8px !important;
    font-size: 13px !important;
}
.delete-check {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--danger);
    cursor: pointer;
    margin-top: 2px;
}

/* 编辑页左右分栏 */
.update-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 20px;
    align-items: start;
}
.info-card {
    text-align: center;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.info-title {
    font-size: 15px;
    font-weight: 600;
}
.master-qr-container {
    width: 160px;
    height: 160px;
    margin: 0 auto;
    padding: 6px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #ffffff;
}
.master-qr-large {
    width: 100%;
    height: 100%;
    object-fit: contain;
}
.info-link {
    display: flex;
    flex-direction: column;
    gap: 6px;
    align-items: center;
}

/* 落地展示页 */
body.landing {
    background: var(--surface);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.landing-card {
    text-align: center;
    max-width: 360px;
    width: 100%;
    transition: background 0.3s;
}
.landing-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #111827;
}
.hint {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 20px;
    line-height: 1.6;
}
.qr-image-wrapper {
    position: relative;
    display: inline-block;
    min-width: 248px;
    min-height: 248px;
}
.qr-image {
    display: inline-block;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #ffffff;
    box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}
.qr-image img {
    width: 220px;
    height: 220px;
    object-fit: contain;
    display: block;
}

/* 骨架屏（Skeleton Loader）微光扫光效果 */
.qr-skeleton {
    width: 248px;
    height: 248px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: #f3f4f6;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(0,0,0,0.02);
}
.skeleton-shimmer {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.6) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    animation: skeleton-sweep 1.6s infinite ease-in-out;
}
@keyframes skeleton-sweep {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}
.skeleton-tip {
    position: relative;
    z-index: 2;
    font-size: 12px;
    color: var(--text-light);
    letter-spacing: 0.5px;
}

/* 二维码加载失败重试卡片 */
.qr-error-state {
    width: 248px;
    height: 248px;
    border-radius: 12px;
    border: 1px dashed var(--border-strong);
    background: #fafafa;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    gap: 10px;
}
.qr-error-icon {
    font-size: 32px;
    line-height: 1;
}
.qr-error-text {
    font-size: 13px;
    color: var(--text-muted);
    text-align: center;
    margin: 0;
}
.retry-btn {
    margin-top: 4px;
}

.updated-at {
    margin-top: 14px;
    font-size: 12px;
    color: var(--text-muted);
}
.landing-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--danger-bg);
    color: var(--danger);
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
}
.landing-icon.icon-warn {
    background: var(--warn-bg);
    color: var(--warn);
}

/* 移动端响应式排版与间距优化 (< 768px) */
@media (max-width: 768px) {
    .container {
        padding: 0 14px;
    }
    .main {
        padding-top: 16px;
        padding-bottom: 60px;
    }
    .topbar-inner {
        height: 52px;
    }
    .brand h1 {
        font-size: 15px;
    }
    
    /* 活码列表卡片响应式重构 */
    .card-list {
        gap: 12px;
    }
    .code-card {
        flex-direction: column;
        padding: 16px;
        gap: 14px;
    }
    .code-card-main {
        width: 100%;
        gap: 12px;
    }
    .meta-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    .code-actions {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
        width: 100%;
    }
    .code-actions .btn {
        width: 100%;
        min-height: 38px;
    }
    .code-actions .inline-form {
        display: block;
        width: 100%;
    }
    .code-card-qr {
        align-self: center;
        flex-direction: column;
        padding-top: 8px;
        border-top: 1px dashed var(--border);
        width: 100%;
    }
    .master-qr-box {
        width: 110px;
        height: 110px;
    }

    /* 编辑页左右结构变为单列 */
    .update-layout {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .form-card {
        padding: 18px 16px;
        gap: 18px;
    }

    /* 统计页移动端适配 */
    .stats-summary {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    .stat-card {
        padding: 14px 16px;
    }
    .stat-value {
        font-size: 24px;
    }
    .filter-inputs {
        flex-direction: column;
        align-items: stretch;
    }
    .filter-group input[type="date"] {
        width: 100%;
    }
    .filter-actions {
        width: 100%;
    }
    .filter-actions .btn {
        flex: 1;
    }
    .export-btn {
        margin-left: 0;
        width: 100%;
        margin-top: 6px;
    }
    .radio-group {
        grid-template-columns: 1fr;
    }
    .qr-row {
        flex-direction: column;
        padding: 12px;
    }
    .qr-row-thumb {
        width: 80px;
        height: 80px;
    }
    .remove-row {
        align-self: flex-end;
        margin-top: -30px;
    }
}

/* 渠道分析与地域分布样式 */
.channel-chart-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.channel-bar-item {
    background: var(--bg-subtle);
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}
.channel-bar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    flex-wrap: wrap;
    gap: 8px;
}
.channel-badge {
    font-weight: 600;
    font-size: 13px;
    color: var(--text-main);
}
.channel-metrics {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.conversion-pill {
    background: #e6f7ec;
    color: #1a7f37;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 500;
}
[data-theme="dark"] .conversion-pill {
    background: rgba(35, 134, 54, 0.2);
    color: #3fb950;
}
.channel-track {
    height: 7px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}
.channel-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    transition: width 0.4s ease;
}

/* 地域渗透分布布局 */
.geo-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 16px;
}
@media (max-width: 768px) {
    .geo-layout {
        grid-template-columns: 1fr;
    }
}
.geo-box {
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
}
.geo-box-title {
    font-size: 14px;
    font-weight: 600;
    margin: 0 0 14px 0;
    color: var(--text-main);
}
.geo-bar-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.geo-bar-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
}
.geo-rank {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--border);
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.geo-rank.top {
    background: var(--primary);
    color: #fff;
}
.geo-name {
    width: 60px;
    font-weight: 500;
    flex-shrink: 0;
    color: var(--text-main);
}
.geo-track {
    flex: 1;
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
}
.geo-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 3px;
    transition: width 0.3s;
}
.geo-cnt {
    font-size: 12px;
    font-weight: 600;
    width: 65px;
    text-align: right;
    color: var(--text-main);
}
.geo-ratio {
    font-size: 11px;
    color: var(--text-muted);
    width: 45px;
    text-align: right;
}

/* 城市卡片网格 */
.city-tags-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(105px, 1fr));
    gap: 8px;
}
.city-tag-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 10px;
    text-align: center;
}
.city-tag-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-main);
}
.city-tag-count {
    font-size: 11px;
    color: var(--primary);
    margin-top: 2px;
    font-weight: 600;
}
.city-tag-count span {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: normal;
}