:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --success: #16a34a;
    --warning: #d97706;
    --danger: #dc2626;
    --bg: #f8fafc;
    --card: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}
.container { max-width: 1200px; margin: 0 auto; padding: 20px; }
header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 40px 20px;
    text-align: center;
    margin-bottom: 30px;
    border-radius: 0 0 20px 20px;
}
header h1 { font-size: 2rem; margin-bottom: 8px; }
header p { opacity: 0.9; font-size: 1rem; }
.card {
    background: var(--card);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    border: 1px solid var(--border);
}
.card h2 {
    font-size: 1.2rem;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: 12px;
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: #fafbfc;
}
.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--primary);
    background: #eff6ff;
}
.upload-zone .icon { font-size: 3rem; margin-bottom: 12px; }
.upload-zone p { color: var(--text-secondary); }
.upload-zone input { display: none; }
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #15803d; }
.btn-warning { background: var(--warning); color: white; }
.btn-warning:hover { background: #b45309; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 0.9rem;
}
.form-group input, .form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.95rem;
}
.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary);
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 768px) { .grid-2 { grid-template-columns: 1fr; } }
.stats-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}
.stat-box {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    padding: 16px;
    border-radius: 10px;
    text-align: center;
}
.stat-box .num {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
}
.stat-box .label { font-size: 0.85rem; color: var(--text-secondary); }
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
th, td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
th {
    background: #f1f5f9;
    font-weight: 600;
    position: sticky;
    top: 0;
}
tr:hover { background: #f8fafc; }
.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}
.badge-zh { background: #fee2e2; color: #991b1b; }
.badge-en { background: #dbeafe; color: #1e40af; }
.badge-other { background: #f3f4f6; color: #374151; }
.pages-list {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.pages-list:hover { white-space: normal; overflow: visible; }
.hidden { display: none !important; }
.loading {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid #ffffff;
    border-top-color: transparent;
    border-radius: 50%;
}
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}
.alert-info { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }
.alert-success { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.alert-error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.file-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: 8px;
    margin-bottom: 16px;
}
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    background: #f1f5f9;
    padding: 4px;
    border-radius: 10px;
}
.tab {
    flex: 1;
    padding: 10px;
    text-align: center;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s;
    border: none;
    background: transparent;
    color: var(--text-secondary);
}
.tab.active {
    background: white;
    color: var(--primary);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.tab-content.hidden { display: none; }
.replace-rule {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-bottom: 8px;
}
.replace-rule input { flex: 1; }
.replace-rule button {
    padding: 8px 12px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}
.add-rule-btn {
    background: var(--success);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
}
.mode-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
}
.result-download {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 24px;
    background: #f0fdf4;
    border-radius: 10px;
    margin-top: 16px;
}
/* ========== Element UI Select Style ========== */
.el-select { position: relative; display: inline-block; width: 100%; }
.el-select-trigger {
    display: flex; align-items: center; justify-content: space-between;
    width: 100%; min-height: 40px; padding: 0 12px;
    background: #fff; border: 1px solid #dcdfe6; border-radius: 4px;
    cursor: pointer; transition: border-color 0.2s; font-size: 0.9rem;
    box-sizing: border-box;
}
.el-select-trigger:hover { border-color: #c0c4cc; }
.el-select-trigger.open { border-color: #409eff; }
.el-select-trigger .el-select-placeholder { color: #a8abb2; }
.el-select-trigger .el-select-value { color: #606266; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.el-select-trigger .el-select-arrow {
    width: 0; height: 0; border-left: 5px solid transparent; border-right: 5px solid transparent;
    border-top: 6px solid #c0c4cc; margin-left: 8px; transition: transform 0.3s;
}
.el-select-trigger.open .el-select-arrow { transform: rotate(180deg); }
.el-select-tags {
    display: flex; flex-wrap: wrap; gap: 4px; flex: 1;
}
.el-select-tag {
    display: inline-flex; align-items: center; gap: 4px;
    background: #f0f2f5; color: #606266; border: 1px solid #e4e7ed;
    padding: 2px 8px; border-radius: 4px; font-size: 0.85rem;
}
.el-select-tag .el-tag-close {
    cursor: pointer; color: #a8abb2; font-size: 0.75rem; font-weight: bold;
    width: 14px; height: 14px; display: flex; align-items: center; justify-content: center;
    border-radius: 50%; transition: all 0.2s;
}
.el-select-tag .el-tag-close:hover { background: #909399; color: #fff; }
.el-select-dropdown {
    position: absolute; top: calc(100% + 6px); left: 0; width: 100%;
    background: #fff; border: 1px solid #e4e7ed; border-radius: 4px;
    box-shadow: 0 2px 12px 0 rgba(0,0,0,0.1); z-index: 100;
    max-height: 240px; overflow-y: auto; display: none;
}
.el-select-dropdown.open { display: block; }
.el-select-option {
    padding: 8px 16px; cursor: pointer; font-size: 0.9rem;
    color: #606266; transition: background 0.15s; display: flex; align-items: center; gap: 8px;
}
.el-select-option:hover { background: #f5f7fa; }
.el-select-option.selected { color: #409eff; font-weight: 500; background: #f5f7fa; }
.el-select-option .el-check {
    width: 14px; height: 14px; border: 1px solid #dcdfe6; border-radius: 2px;
    display: none; align-items: center; justify-content: center; font-size: 0.7rem; color: #fff;
    transition: all 0.2s; flex-shrink: 0;
}
.el-select.multiple .el-option .el-check { display: flex; }
.el-select-option.selected .el-check { background: #409eff; border-color: #409eff; }
.el-select-option .el-check::after {
    content: ""; width: 3px; height: 6px; border: solid white; border-width: 0 1.5px 1.5px 0;
    transform: rotate(45deg); display: none; margin-bottom: 1px;
}
.el-select-option.selected .el-check::after { display: block; }
.el-select-backdrop {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 99; display: none;
}
.el-select-backdrop.open { display: block; }
/* size rule card */
.size-rule-card, .color-rule-card {
    background: #f8fafc; border: 1px solid var(--border); border-radius: 8px;
    padding: 16px; margin-bottom: 12px;
}
.size-rule-card .rule-header, .color-rule-card .rule-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 12px; font-weight: 600; font-size: 0.9rem; color: var(--text);
}
.size-rule-card .rule-header button, .color-rule-card .rule-header button {
    background: none; border: none; color: var(--danger); cursor: pointer; font-size: 1rem;
}