/* ==========================================================================
   政务紧凑型通用样式库 - 规范、严肃、高信息密度
   ========================================================================== */

:root {
    /* 核心政务色彩 */
    --gov-blue: #163e75;           /* 顶栏深政务蓝 */
    --gov-blue-light: #1e4f94;     /* 悬停与浅政务蓝 */
    --primary-color: #1a56db;      /* 主题政务蓝 */
    --secondary-color: #103a7a;    /* 强调深蓝 */
    --success-color: #15803d;      /* 规范绿 */
    --warning-color: #b45309;      /* 警示橙黄 */
    --danger-color: #b91c1c;       /* 规范红 */
    --info-color: #0369a1;         /* 提示蓝 */

    /* 中性与边框色彩 */
    --text-color: #1f2937;         /* 正文字色 */
    --text-muted: #64748b;         /* 次要文本 */
    --bg-color: #f0f2f5;           /* 行政背景灰 */
    --card-bg: #ffffff;            /* 卡片白底 */
    --border-color: #dce2e8;       /* 规整浅灰框线 */
    --border-color-light: #edf2f7; /* 表格网格线 */
    --table-header-bg: #eaf0f8;    /* 表头政务蓝灰底 */
    --table-stripe-bg: #f9fafb;    /* 斑马纹浅灰底 */

    /* 紧凑高度体系 */
    --nav-height: 46px;            /* 紧凑顶栏高度 */
    --control-height: 30px;        /* 紧凑表单控件高度 */

    /* 紧凑间距系统 */
    --spacing-xs: 3px;
    --spacing-sm: 6px;
    --spacing-md: 10px;
    --spacing-lg: 14px;
    --spacing-xl: 18px;
    --spacing-2xl: 24px;

    /* 严谨克制微圆角 (政务公文感) */
    --border-radius-xs: 2px;
    --border-radius-sm: 3px;
    --border-radius-md: 4px;
    --border-radius-lg: 6px;

    /* 极简清爽微投影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
    --shadow-md: 0 1px 3px 0 rgba(0, 0, 0, 0.06), 0 1px 2px 0 rgba(0, 0, 0, 0.03);

    /* 字号规范 (12px ~ 18px 实用梯次) */
    --font-size-xs: 0.75rem;       /* 12px */
    --font-size-sm: 0.8125rem;     /* 13px */
    --font-size-base: 0.875rem;    /* 14px */
    --font-size-md: 0.9375rem;     /* 15px */
    --font-size-lg: 1.0625rem;     /* 17px */
    --font-size-xl: 1.1875rem;     /* 19px */

    /* 字重 */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", "Segoe UI", Roboto, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.45;
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
}

/* 页面容器 - 紧凑边距 */
.container,
.container-full,
.container-narrow,
.container-minimal {
    max-width: 1280px;
    margin: calc(var(--nav-height) + 8px) auto 0;
    padding: 0 12px 14px;
}

.container-narrow {
    max-width: 860px;
}

.container-minimal {
    margin-top: calc(var(--nav-height) + 4px);
    padding: 0 8px 10px;
}

/* 规整政务卡片 */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    padding: 10px 14px;
    margin-bottom: 8px;
}

.card-header {
    padding: 6px 0 8px;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    color: #0f274a;
    display: flex;
    align-items: center;
    margin: 0;
}

/* 严肃政务蓝竖线标记 */
.card-title::before,
h2.card-title::before,
h3.section-title::before {
    content: '';
    display: inline-block;
    width: 3.5px;
    height: 14px;
    background-color: var(--primary-color);
    margin-right: 7px;
    border-radius: 1.5px;
}

.card-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-top: 2px;
}

/* 紧凑规整表格 - 政务网格标准 */
.table-container {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: #ffffff;
    margin-bottom: 8px;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

.table th,
.table td {
    padding: 6px 9px;
    vertical-align: middle;
    border-bottom: 1px solid var(--border-color-light);
    border-right: 1px solid var(--border-color-light);
}

.table th:last-child,
.table td:last-child {
    border-right: none;
}

/* 表头权威政务灰蓝风格 */
.table thead th,
.table th {
    background-color: var(--table-header-bg);
    color: #173868;
    font-weight: var(--font-weight-semibold);
    text-align: center;
    white-space: nowrap;
    border-bottom: 1px solid var(--border-color);
    padding: 6px 8px;
    font-size: 12.5px;
}

/* 斑马纹与悬浮响应 */
.table tbody tr:nth-of-type(even) {
    background-color: var(--table-stripe-bg);
}

.table tbody tr:hover {
    background-color: #eaf2fd !important;
}

/* 紧凑/超紧凑型表格修饰符 */
.table-sm th,
.table-sm td {
    padding: 4px 7px;
    font-size: 12.5px;
}

.table-xs th,
.table-xs td {
    padding: 3px 6px;
    font-size: 12px;
}

/* 紧凑表单控件体系 */
.form-group {
    margin-bottom: 8px;
}

.form-label {
    display: block;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    color: #334155;
    margin-bottom: 4px;
}

.form-control,
.form-select {
    display: block;
    width: 100%;
    min-height: 32px;
    padding: 4px 8px;
    font-size: var(--font-size-sm);
    color: #1e293b !important;
    background-color: #ffffff !important;
    border: 1px solid #cfd5de;
    border-radius: var(--border-radius-sm);
    box-sizing: border-box !important;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

select.form-control,
select.form-select,
select {
    min-height: 32px;
    line-height: normal !important;
    color: #1e293b !important;
    background-color: #ffffff !important;
}

.form-control:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(26, 86, 219, 0.18);
    background-color: #ffffff;
}

.form-control::placeholder {
    color: #94a3b8;
    font-size: 12.5px;
}

.form-control-sm,
.form-select-sm {
    height: 28px !important;
    padding: 2px 8px !important;
    font-size: 12.5px !important;
    line-height: 24px !important;
    box-sizing: border-box !important;
}

textarea.form-control,
textarea.form-control-sm,
textarea {
    height: auto !important;
    min-height: 80px !important;
    line-height: 1.5 !important;
    padding: 6px 10px !important;
    resize: vertical;
}

.form-text {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-top: 3px;
}

/* ==========================================================================
   政务坚固型按钮体系 - 彻底解决错位、下沉、不齐与换行问题
   ========================================================================== */
.btn,
button.btn,
a.btn,
input[type="button"].btn,
input[type="submit"].btn {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    vertical-align: middle !important;
    height: var(--control-height) !important;
    box-sizing: border-box !important;
    padding: 0 12px !important;
    font-size: var(--font-size-sm) !important;
    font-weight: var(--font-weight-medium) !important;
    border-radius: var(--border-radius-sm) !important;
    border: 1px solid transparent !important;
    text-decoration: none !important;
    text-align: center !important;
    cursor: pointer !important;
    white-space: nowrap !important;
    transition: all 0.15s ease !important;
    line-height: 1 !important;
    margin: 0;
}

/* 按钮内图标精准垂直居中 */
.btn svg,
.btn i,
.btn .bi {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    vertical-align: middle !important;
    margin-right: 4px;
    flex-shrink: 0;
    line-height: 1;
}

.btn svg:only-child,
.btn i:only-child,
.btn .bi:only-child {
    margin-right: 0 !important;
}

.btn-primary {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: #ffffff !important;
}

.btn-primary:hover {
    background-color: #1344ad !important;
    border-color: #1344ad !important;
}

.btn-secondary {
    background-color: #475569 !important;
    border-color: #475569 !important;
    color: #ffffff !important;
}

.btn-secondary:hover {
    background-color: #334155 !important;
    border-color: #334155 !important;
}

.btn-outline-primary {
    color: var(--primary-color) !important;
    background-color: transparent !important;
    border-color: #93b4f5 !important;
}

.btn-outline-primary:hover {
    background-color: #eff5ff !important;
    border-color: var(--primary-color) !important;
}

.btn-outline-secondary {
    color: #475569 !important;
    background-color: transparent !important;
    border-color: #cbd5e1 !important;
}

.btn-outline-secondary:hover {
    background-color: #f1f5f9 !important;
    border-color: #94a3b8 !important;
}

.btn-success {
    background-color: var(--success-color) !important;
    border-color: var(--success-color) !important;
    color: #ffffff !important;
}

.btn-success:hover {
    background-color: #166534 !important;
    border-color: #166534 !important;
}

.btn-danger {
    background-color: var(--danger-color) !important;
    border-color: var(--danger-color) !important;
    color: #ffffff !important;
}

.btn-danger:hover {
    background-color: #991b1b !important;
    border-color: #991b1b !important;
}

.btn-warning {
    background-color: #d97706 !important;
    border-color: #d97706 !important;
    color: #ffffff !important;
}

.btn-warning:hover {
    background-color: #b45309 !important;
    border-color: #b45309 !important;
}

/* 规格梯次：sm 统一度量为 28px 与 form-control-sm 严格齐平 */
.btn-sm,
button.btn-sm,
a.btn-sm {
    height: 28px !important;
    padding: 0 9px !important;
    font-size: 12px !important;
    line-height: 26px !important;
}

/* 表格专用超紧凑型 xs 按钮：24px 高度 */
.btn-xs,
button.btn-xs,
a.btn-xs {
    height: 24px !important;
    padding: 0 7px !important;
    font-size: 11.5px !important;
    line-height: 22px !important;
    border-radius: 2px !important;
}

.btn-lg {
    height: 36px !important;
    padding: 0 16px !important;
    font-size: 14px !important;
}

.btn-block {
    display: flex !important;
    width: 100% !important;
}

/* 表单输入组 (Input Group) 拼接缝合防错位 */
.input-group {
    display: flex !important;
    flex-wrap: nowrap !important;
    align-items: stretch !important;
}

.input-group > * {
    margin: 0 !important;
}

.input-group > .form-control,
.input-group > .form-select,
.input-group > .input-group-text,
.input-group > .btn {
    height: 30px !important;
    box-sizing: border-box !important;
}

.input-group-sm > .form-control,
.input-group-sm > .form-select,
.input-group-sm > .input-group-text,
.input-group-sm > .btn {
    height: 28px !important;
    box-sizing: border-box !important;
}

.input-group > .input-group-text {
    padding: 0 8px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    background-color: #f8fafc !important;
    border-color: #cfd5de !important;
    color: #64748b !important;
}

/* 表格内部操作列按钮防错位与单行防折行 */
table td .btn,
table td a.btn,
table td button.btn {
    margin: 1px 2px !important;
    vertical-align: middle !important;
}

table td:last-child {
    white-space: nowrap !important;
    vertical-align: middle !important;
}

/* 弹性容器按钮组强制垂直居中 */
.d-flex.gap-1,
.d-flex.gap-2,
.btn-group {
    align-items: center !important;
}

/* 清除搜索栏/表单内不当的 mt-2 错位 */
form .btn.mt-2,
form .btn.mt-1,
.d-flex > .btn.mt-2,
.d-flex > .btn.mt-1 {
    margin-top: 0 !important;
    margin-bottom: 0 !important;
}

/* 徽章 (Badge) - 严谨紧凑风格，严格单行不折行 */
.badge,
.table td .badge {
    display: inline-block !important;
    padding: 2px 6px !important;
    font-size: 11.5px !important;
    font-weight: 500 !important;
    line-height: 1.2 !important;
    border-radius: var(--border-radius-xs) !important;
    white-space: nowrap !important;
    word-break: keep-all !important;
    vertical-align: middle !important;
}

/* 确保年级与中考年份单行绝不折行 */
.grade-cell,
td.grade-cell {
    white-space: nowrap !important;
    word-break: keep-all !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
    color: #ffffff;
}

.bg-secondary {
    background-color: #64748b !important;
    color: #ffffff;
}

.bg-success {
    background-color: var(--success-color) !important;
    color: #ffffff;
}

.bg-danger {
    background-color: var(--danger-color) !important;
    color: #ffffff;
}

.bg-warning {
    background-color: var(--warning-color) !important;
    color: #ffffff;
}

.bg-info {
    background-color: var(--info-color) !important;
    color: #ffffff;
}

/* 工具类规范 */
.text-primary { color: var(--primary-color) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-success { color: var(--success-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-warning { color: var(--warning-color) !important; }

.small { font-size: var(--font-size-xs) !important; }
.h4, h4 { font-size: 16px; }
.h5, h5 { font-size: 15px; }

/* 紧凑间距工具类 */
.mb-1 { margin-bottom: 4px !important; }
.mb-2 { margin-bottom: 7px !important; }
.mb-3 { margin-bottom: 10px !important; }
.mb-4 { margin-bottom: 14px !important; }

.mt-1 { margin-top: 4px !important; }
.mt-2 { margin-top: 7px !important; }
.mt-3 { margin-top: 10px !important; }
.mt-4 { margin-top: 14px !important; }

.py-1 { padding-top: 3px !important; padding-bottom: 3px !important; }
.py-2 { padding-top: 6px !important; padding-bottom: 6px !important; }
.py-3 { padding-top: 9px !important; padding-bottom: 9px !important; }

.px-1 { padding-left: 4px !important; padding-right: 4px !important; }
.px-2 { padding-left: 8px !important; padding-right: 8px !important; }
.px-3 { padding-left: 12px !important; padding-right: 12px !important; }

.gap-1 { gap: 4px !important; }
.gap-2 { gap: 8px !important; }
.gap-3 { gap: 12px !important; }

/* 打印支持 */
@media print {
    .no-print {
        display: none !important;
    }
    .container {
        max-width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
    }
    .card {
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
    }
}

/* ==========================================================================
   题目图片展示规范与全屏点击放大 (Lightbox Viewer)
   ========================================================================== */
.question-image-box {
    margin: 8px 0 12px;
    display: inline-block;
    max-width: 100%;
    position: relative;
    vertical-align: top;
}

.question-preview-img,
.question-image img {
    display: block;
    max-width: 100% !important;
    /* 默认高度提升至520px，保证方形图片有充足空间舒展展示，不再挤成巴掌大的扁平小图 */
    max-height: 520px !important;
    width: auto !important;
    height: auto !important;
    object-fit: contain !important;
    border-radius: 6px;
    border: 1px solid #dce2e8;
    background-color: #ffffff;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
    cursor: zoom-in;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.question-preview-img:hover,
.question-image img:hover {
    transform: translateY(-2px);
    border-color: #3b82f6;
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.16);
}

.question-image-hint {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11.5px;
    color: #64748b;
    margin-top: 5px;
    padding: 2px 6px;
    border-radius: 4px;
    background-color: #f1f5f9;
    border: 1px solid #e2e8f0;
    user-select: none;
    cursor: pointer;
    transition: all 0.15s ease;
}

.question-image-hint svg {
    flex-shrink: 0;
}

.question-image-box:hover .question-image-hint,
.question-image-hint:hover {
    color: #1d4ed8;
    background-color: #dbeafe;
    border-color: #bfdbfe;
}

/* 全屏图片预览模态框 (Lightbox Modal) */
.image-lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.88);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 99999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.22s ease;
    overflow: hidden;
    user-select: none;
}

.image-lightbox-overlay.active {
    opacity: 1;
    visibility: visible;
}

.image-lightbox-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.65) 0%, rgba(0, 0, 0, 0) 100%);
    z-index: 100001;
    pointer-events: auto;
}

.image-lightbox-title {
    color: #f8fafc;
    font-size: 13.5px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.2px;
}

.image-lightbox-tools {
    display: flex;
    align-items: center;
    gap: 8px;
}

.image-lightbox-btn {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.22);
    color: #ffffff !important;
    width: 34px;
    height: 34px;
    border-radius: 6px;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.15s ease;
    outline: none;
    padding: 0 !important;
    text-decoration: none;
    line-height: 1 !important;
}

.image-lightbox-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    color: #ffffff !important;
    transform: scale(1.06);
    border-color: rgba(255, 255, 255, 0.45);
}

.image-lightbox-btn.btn-close-lightbox {
    background: rgba(239, 68, 68, 0.85);
    border-color: rgba(239, 68, 68, 0.95);
    margin-left: 6px;
}

.image-lightbox-btn.btn-close-lightbox:hover {
    background: rgba(220, 38, 38, 1);
    border-color: rgba(220, 38, 38, 1);
}

.image-lightbox-body {
    flex: 1;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: grab;
    position: relative;
    padding: 60px 24px;
    box-sizing: border-box;
}

.image-lightbox-body.is-dragging {
    cursor: grabbing;
}

.image-lightbox-img-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.12s ease-out;
    transform-origin: center center;
}

.image-lightbox-img {
    max-width: 90vw;
    max-height: 84vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 6px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.65);
    background-color: #ffffff;
    user-select: none;
    -webkit-user-drag: none;
    pointer-events: auto;
}

.image-lightbox-footer {
    position: absolute;
    bottom: 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.18);
    padding: 6px 16px;
    border-radius: 20px;
    color: #e2e8f0;
    font-size: 11.5px;
    backdrop-filter: blur(6px);
    z-index: 100001;
    pointer-events: none;
}

.image-lightbox-footer kbd {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 3px;
    padding: 1px 5px;
    font-size: 10px;
    color: #ffffff;
    font-family: inherit;
}