/**
 * 书香少年读书知识答题竞赛系统 - 主样式文件
 * 简洁、现代、适合教育场景
 */

/* ==================== 基础样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4A90A4;
    --primary-dark: #3A7A8A;
    --primary-light: #6AB0C4;
    --secondary-color: #F5A623;
    --success-color: #27AE60;
    --danger-color: #E74C3C;
    --warning-color: #F39C12;
    --info-color: #3498DB;
    --dark-color: #2C3E50;
    --gray-color: #95A5A6;
    --light-gray: #ECF0F1;
    --white: #FFFFFF;
    --text-color: #333333;
    --border-color: #E0E0E0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
    --radius: 8px;
    --radius-lg: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #F8FAFB;
    min-height: 100vh;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-dark);
}

/* ==================== 布局 ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-sm {
    max-width: 600px;
}

.container-md {
    max-width: 800px;
}

.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page-wrapper.admin-layout {
    flex-direction: row;
    align-items: stretch;
}

.main-content {
    flex: 1;
    padding: 40px 0;
}

/* ==================== 头部 ==================== */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--white);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-nav {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
    padding: 8px 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--white);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--white);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.header-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    position: relative;
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.user-name {
    color: var(--white);
    font-weight: 500;
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 160px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
}

.user-info:hover .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: 10px 20px;
    color: var(--text-color);
    transition: background 0.3s ease;
}

.dropdown-item:hover {
    background: var(--light-gray);
    color: var(--primary-color);
}

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--primary-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 144, 164, 0.4);
}

.btn-secondary {
    background: var(--light-gray);
    color: var(--text-color);
}

.btn-secondary:hover {
    background: #DDE4E6;
}

.btn-success {
    background: var(--success-color);
    color: var(--white);
}

.btn-success:hover {
    background: #219A52;
}

.btn-danger {
    background: var(--danger-color);
    color: var(--white);
}

.btn-danger:hover {
    background: #C0392B;
}

.btn-warning {
    background: var(--warning-color);
    color: var(--white);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* ==================== 表单 ==================== */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.form-label .required {
    color: var(--danger-color);
    margin-left: 4px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 164, 0.1);
}

.form-control::placeholder {
    color: var(--gray-color);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

select.form-control {
    cursor: pointer;
}

.form-error {
    color: var(--danger-color);
    font-size: 0.9rem;
    margin-top: 5px;
}

.form-hint {
    color: var(--gray-color);
    font-size: 0.9rem;
    margin-top: 5px;
}

/* ==================== 卡片 ==================== */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    background: #FAFBFC;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
}

.card-body {
    padding: 24px;
}

.card-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    background: #FAFBFC;
}

/* ==================== 试卷卡片 ==================== */
.exam-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 24px;
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.exam-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.exam-card-header {
    position: relative;
    display: flex;
    justify-content: center;
    margin-bottom: 16px;
}

.exam-card-titles {
    text-align: center;
}

.exam-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 4px;
    text-align: center;
}

.exam-card-subtitle {
    font-size: 0.97rem;
    color: #666;
    font-weight: normal;
    margin: 0 0 4px;
    text-align: center;
}

.exam-card-badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-light);
    color: var(--white);
    border-radius: 20px;
    font-size: 0.85rem;
}

.exam-status-badge {
    position: absolute;
    top: 0;
    right: 0;
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.exam-status-ended {
    background: var(--gray-color);
    color: var(--white);
}

.exam-card-desc {
    color: var(--gray-color);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 16px;
    flex: 1;
}

.exam-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-color);
    font-size: 0.9rem;
}

.meta-icon {
    color: var(--primary-color);
}

.exam-card-footer {
    display: flex;
    gap: 12px;
}

/* ==================== 网格布局 ==================== */
.grid {
    display: grid;
    gap: 24px;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 992px) {
    .grid-3,
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* ==================== 统计卡片 ==================== */
.stat-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 20px;
}

.stat-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.stat-icon.blue {
    background: rgba(52, 152, 219, 0.1);
    color: var(--info-color);
}

.stat-icon.green {
    background: rgba(39, 174, 96, 0.1);
    color: var(--success-color);
}

.stat-icon.orange {
    background: rgba(243, 156, 18, 0.1);
    color: var(--warning-color);
}

.stat-icon.purple {
    background: rgba(155, 89, 182, 0.1);
    color: #9B59B6;
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-color);
    line-height: 1.2;
}

.stat-label {
    color: var(--gray-color);
    font-size: 0.95rem;
    margin-top: 4px;
}

/* ==================== 表格 ==================== */
.table-wrapper {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: #FAFBFC;
    font-weight: 600;
    color: var(--text-color);
    white-space: nowrap;
}

.table tbody tr:hover {
    background: #F8F9FA;
}

.table td {
    color: var(--text-color);
}

.table-actions {
    display: flex;
    gap: 8px;
}

/* ==================== 分页 ==================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 30px;
}

.pagination-item {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-color);
    transition: all 0.3s ease;
    cursor: pointer;
}

.pagination-item:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.pagination-item.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
}

.pagination-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==================== 提示消息 ==================== */
.alert {
    padding: 16px 20px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success {
    background: rgba(39, 174, 96, 0.1);
    border: 1px solid var(--success-color);
    color: var(--success-color);
}

.alert-danger {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
}

.alert-warning {
    background: rgba(243, 156, 18, 0.1);
    border: 1px solid var(--warning-color);
    color: var(--warning-color);
}

.alert-info {
    background: rgba(52, 152, 219, 0.1);
    border: 1px solid var(--info-color);
    color: var(--info-color);
}

/* ==================== 徽标 ==================== */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1.2;
    white-space: nowrap;
}

.badge-success {
    background: rgba(39, 174, 96, 0.12);
    color: var(--success-color);
}

.badge-warning {
    background: rgba(243, 156, 18, 0.12);
    color: var(--warning-color);
}

.badge-secondary {
    background: rgba(149, 165, 166, 0.15);
    color: #5f6f70;
}

/* ==================== 确认对话框 ==================== */
.confirm-dialog {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.confirm-dialog.active {
    display: flex;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.confirm-dialog-box {
    background: #fff;
    border-radius: 20px;
    width: 90%;
    max-width: 400px;
    padding: 32px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.confirm-dialog-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.confirm-dialog-icon-wrap {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a5a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 8px 20px rgba(238, 90, 90, 0.3);
}

.confirm-dialog-icon-wrap svg {
    width: 28px;
    height: 28px;
    color: #fff;
}

.confirm-dialog-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: #1a1a2e;
    margin: 0;
}

.confirm-dialog-desc {
    font-size: 0.95rem;
    color: #64748b;
    margin: 8px 0 0 0;
    line-height: 1.5;
}

.confirm-dialog-line {
    height: 1px;
    background: #e2e8f0;
    margin: 20px 0;
}

.confirm-dialog-buttons {
    display: flex;
    gap: 12px;
}

.confirm-dialog-btn {
    flex: 1;
    padding: 14px 24px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    outline: none;
}

.confirm-dialog-btn-cancel {
    background: #f1f5f9;
    color: #475569;
}

.confirm-dialog-btn-cancel:hover {
    background: #e2e8f0;
    transform: translateY(-1px);
}

.confirm-dialog-btn-cancel:active {
    transform: translateY(0);
}

.confirm-dialog-btn-confirm {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a5a 100%);
    color: #fff;
    box-shadow: 0 4px 15px rgba(238, 90, 90, 0.3);
}

.confirm-dialog-btn-confirm:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(238, 90, 90, 0.4);
}

.confirm-dialog-btn-confirm:active {
    transform: translateY(0);
}

/* ==================== 退出登录对话框（系统主题） ==================== */
.logout-dialog {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logout-dialog-mask {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.logout-dialog-box {
    position: relative;
    background: #fff;
    border-radius: 16px;
    width: 90%;
    max-width: 340px;
    padding: 36px 32px 28px;
    box-shadow: 0 20px 60px rgba(74, 144, 164, 0.25);
    animation: logoutDialogIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes logoutDialogIn {
    from {
        opacity: 0;
        transform: scale(0.85) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.logout-dialog-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(74, 144, 164, 0.35);
}

.logout-dialog-icon svg {
    width: 28px;
    height: 28px;
    color: #fff;
}

.logout-dialog-title {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 700;
    color: #1a2a3a;
    margin: 0 0 10px;
}

.logout-dialog-desc {
    text-align: center;
    font-size: 0.9rem;
    color: #6b7c8d;
    margin: 0 0 28px;
    line-height: 1.6;
}

.logout-dialog-buttons {
    display: flex;
    gap: 12px;
}

.logout-btn {
    flex: 1;
    padding: 13px 16px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    border: none;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

.logout-btn-cancel {
    background: #f0f4f7;
    color: #5a6a7a;
}

.logout-btn-cancel:hover {
    background: #e4e9ed;
    color: #3a4a5a;
}

.logout-btn-cancel:active {
    background: #d8dde2;
    transform: scale(0.98);
}

.logout-btn-confirm {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: #fff;
    box-shadow: 0 4px 14px rgba(74, 144, 164, 0.35);
}

.logout-btn-confirm:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 144, 164, 0.45);
}

.logout-btn-confirm:active {
    transform: scale(0.98);
    box-shadow: 0 2px 8px rgba(74, 144, 164, 0.3);
}

/* ==================== 模态框 ==================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--white);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--gray-color);
    transition: color 0.3s ease;
}

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

.modal-body {
    padding: 24px;
    overflow-y: auto;
    max-height: calc(90vh - 140px);
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* ==================== 答题页面 ==================== */
.exam-header {
    background: var(--white);
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.exam-timer {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    background: rgba(231, 76, 60, 0.1);
    border-radius: var(--radius);
    color: var(--danger-color);
    font-weight: 600;
    font-size: 1.2rem;
}

.exam-timer.warning {
    background: rgba(243, 156, 18, 0.1);
    color: var(--warning-color);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.question-section {
    margin-bottom: 30px;
}

.question-type-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    padding-bottom: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.question-item {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.question-number {
    display: inline-block;
    width: 28px;
    height: 28px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    text-align: center;
    line-height: 28px;
    font-size: 0.9rem;
    margin-right: 12px;
}

.question-content {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

.question-score {
    color: var(--warning-color);
    font-size: 0.9rem;
}

.option-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.option-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 18px;
    background: #F8F9FA;
    border: 2px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.3s ease;
}

.option-item:hover {
    background: #EEF2F5;
}

.option-item.selected {
    background: rgba(74, 144, 164, 0.1);
    border-color: var(--primary-color);
}

.option-item input {
    margin-top: 3px;
}

.option-item label {
    flex: 1;
    cursor: pointer;
    line-height: 1.6;
}

/* ==================== 证书样式 ==================== */
.certificate-card {
    background: linear-gradient(135deg, #FFF9E6 0%, #FFF3CC 100%);
    border: 3px solid #D4A84B;
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    position: relative;
}

.certificate-header {
    margin-bottom: 30px;
}

.certificate-title {
    font-size: 2rem;
    font-weight: bold;
    color: #B8860B;
    margin-bottom: 10px;
}

.certificate-subtitle {
    font-size: 1.1rem;
    color: #8B7355;
}

.certificate-body {
    margin-bottom: 30px;
}

.certificate-honor {
    font-size: 1.3rem;
    margin-bottom: 20px;
}

.certificate-name {
    font-size: 2.5rem;
    font-weight: bold;
    color: #8B4513;
    margin-bottom: 20px;
    font-family: "KaiTi", "STKaiti", serif;
}

.certificate-desc {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 20px;
}

.certificate-exam {
    font-size: 1.3rem;
    color: #8B4513;
    font-weight: 600;
    margin-bottom: 10px;
}

.certificate-score {
    font-size: 1.5rem;
    color: #D4A84B;
    font-weight: bold;
}

.certificate-footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #D4A84B;
}

.certificate-date {
    color: #8B7355;
}

.certificate-number {
    font-family: monospace;
    color: #8B7355;
}

.certificate-seal {
    width: 80px;
    height: 80px;
    background: radial-gradient(circle, #D4A84B 0%, #B8860B 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 0.7rem;
    font-weight: bold;
    text-align: center;
    line-height: 1.2;
}

/* ==================== 证书核查结果 ==================== */
.verify-result {
    background: rgba(39, 174, 96, 0.1);
    border: 2px solid var(--success-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
}

.verify-badge {
    width: 80px;
    height: 80px;
    background: var(--success-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--white);
    font-size: 2.5rem;
}

.verify-title {
    font-size: 1.5rem;
    color: var(--success-color);
    margin-bottom: 20px;
}

.verify-info {
    text-align: left;
    background: var(--white);
    border-radius: var(--radius);
    padding: 20px;
}

.verify-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.verify-label {
    color: var(--gray-color);
}

.verify-value {
    font-weight: 600;
    color: var(--text-color);
}

/* ==================== 底部 ==================== */
.footer {
    background: var(--dark-color);
    color: rgba(255, 255, 255, 0.7);
    padding: 30px 0;
    text-align: center;
}

.footer-content {
    font-size: 0.95rem;
}

/* ==================== 管理端样式 ==================== */
.admin-sidebar {
    width: 240px;
    background:
        radial-gradient(circle at top, rgba(106, 176, 196, 0.2), transparent 28%),
        linear-gradient(180deg, #20313f 0%, #1b2b37 48%, #16242f 100%);
    height: 100dvh;
    position: fixed;
    left: 0;
    top: 0;
    padding: 18px 14px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    box-shadow: 16px 0 40px rgba(18, 28, 36, 0.18);
    overflow: hidden;
}

.sidebar-menu {
    list-style: none;
    display: grid;
    gap: 8px;
    overflow-y: auto;
    min-height: 0;
    padding-right: 4px;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.18) transparent;
}

.sidebar-item {
    transition: all 0.3s ease;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    color: rgba(255, 255, 255, 0.82);
    transition: color 0.25s ease, background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
    border-radius: 16px;
    position: relative;
}

.sidebar-icon {
    font-size: 1.05rem;
    width: 38px;
    height: 38px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.08);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
    text-align: center;
    flex-shrink: 0;
}

.sidebar-link-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.sidebar-link-title {
    color: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.3;
}

.sidebar-link-hint {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.78rem;
    line-height: 1.2;
}

.sidebar-item:hover .sidebar-link,
.sidebar-item.active .sidebar-link {
    color: var(--white);
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(2px);
}

.sidebar-item:hover .sidebar-icon,
.sidebar-item.active .sidebar-icon {
    background: rgba(74, 144, 164, 0.2);
}

.sidebar-item.active .sidebar-link {
    box-shadow: inset 0 0 0 1px rgba(111, 186, 206, 0.16);
}

.sidebar-item.active .sidebar-link::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 10px;
    bottom: 10px;
    width: 3px;
    border-radius: 999px;
    background: var(--primary-light);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 14px 16px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(106, 176, 196, 0.95), rgba(74, 144, 164, 0.82));
    color: var(--white);
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    box-shadow: 0 10px 20px rgba(74, 144, 164, 0.2);
    flex-shrink: 0;
}

.sidebar-brand-text {
    min-width: 0;
}

.sidebar-brand-title {
    color: var(--white);
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.3;
}

.sidebar-brand-subtitle {
    color: rgba(255, 255, 255, 0.58);
    font-size: 0.78rem;
    margin-top: 2px;
}

.sidebar-menu-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex: 1;
    min-height: 0;
}

.sidebar-menu-label {
    color: rgba(255, 255, 255, 0.42);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    padding: 0 10px;
}

.sidebar-footer {
    margin-top: auto;
    border-radius: 18px;
    padding: 14px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.sidebar-footer-label {
    color: rgba(255, 255, 255, 0.45);
    font-size: 0.76rem;
    margin-bottom: 6px;
}

.sidebar-footer-value {
    color: rgba(255, 255, 255, 0.86);
    font-size: 0.88rem;
    line-height: 1.5;
}

.sidebar-menu::-webkit-scrollbar {
    width: 8px;
}

.sidebar-menu::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-menu::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.16);
    border-radius: 999px;
}

@media (max-height: 820px) {
    .admin-sidebar {
        padding: 14px 12px;
        gap: 14px;
    }

    .sidebar-brand {
        padding: 12px;
    }

    .sidebar-link {
        padding: 10px 12px;
    }

    .sidebar-icon {
        width: 34px;
        height: 34px;
    }

    .sidebar-link-hint {
        font-size: 0.74rem;
    }

    .sidebar-footer {
        padding: 12px;
    }
}

.admin-main {
    flex: 1;
    margin-left: 240px;
    padding: 30px;
    min-height: 100vh;
    background: #F5F7FA;
}

.admin-page-header {
    background: linear-gradient(180deg, #ffffff 0%, #f9fbfc 100%);
    border: 1px solid rgba(224, 230, 235, 0.9);
    border-radius: 20px;
    margin-bottom: 24px;
    padding: 18px 22px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    box-shadow: 0 16px 30px rgba(31, 52, 71, 0.06);
}

.admin-page-header-main {
    min-width: 0;
}

.admin-page-header-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: #233646;
    line-height: 1.25;
}

.admin-page-header-subtitle {
    margin-top: 6px;
    color: #7b8b98;
    font-size: 0.9rem;
    line-height: 1.6;
}

.admin-page-header-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    flex-wrap: wrap;
}

.admin-page-header-user {
    color: #6f8190;
    font-size: 0.9rem;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.admin-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-color);
}

.admin-actions {
    display: flex;
    gap: 12px;
}

.exam-shell {
    display: grid;
    gap: 24px;
}

.exam-overview {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) minmax(300px, 0.9fr);
    gap: 18px;
    padding: 26px 28px;
    border-radius: 24px;
    background: linear-gradient(135deg, #223746 0%, #2c495c 58%, #34566b 100%);
    color: #fff;
    box-shadow: 0 22px 40px rgba(31, 52, 71, 0.16);
}

.exam-kicker {
    display: inline-flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
    color: rgba(255, 255, 255, 0.86);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.exam-overview-copy h2 {
    margin: 14px 0 10px;
    font-size: 2rem;
    line-height: 1.2;
    color: #fff;
}

.exam-overview-copy p {
    margin: 0;
    max-width: 56ch;
    color: rgba(255, 255, 255, 0.76);
    line-height: 1.75;
}

.exam-overview-meta {
    display: grid;
    gap: 14px;
}

.exam-overview-card {
    padding: 18px 18px 16px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.exam-overview-label {
    color: rgba(255, 255, 255, 0.58);
    font-size: 0.8rem;
    margin-bottom: 10px;
}

.exam-overview-value {
    font-size: 1.45rem;
    font-weight: 700;
    line-height: 1.2;
}

.exam-overview-sub {
    margin-top: 8px;
    color: rgba(255, 255, 255, 0.74);
    line-height: 1.6;
    font-size: 0.88rem;
}

.exam-stat-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.exam-stat-card,
.exam-panel,
.exam-summary-card {
    background: linear-gradient(180deg, #ffffff 0%, #f9fbfc 100%);
    border: 1px solid rgba(224, 230, 235, 0.9);
    border-radius: 22px;
    box-shadow: 0 16px 30px rgba(31, 52, 71, 0.06);
}

.exam-stat-card {
    padding: 20px 20px 18px;
}

.exam-stat-label {
    color: #7b8b98;
    font-size: 0.84rem;
}

.exam-stat-value {
    margin-top: 10px;
    font-size: 2rem;
    font-weight: 700;
    color: #233646;
    line-height: 1;
}

.exam-stat-desc {
    margin-top: 10px;
    color: #748592;
    font-size: 0.88rem;
    line-height: 1.6;
}

.exam-panel {
    padding: 22px;
}

.exam-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.exam-panel-title,
.exam-summary-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #233646;
}

.exam-panel-desc {
    margin-top: 6px;
    color: #7b8b98;
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 62ch;
}

.exam-empty-state {
    padding: 36px 18px 12px;
    text-align: center;
}

.exam-empty-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #233646;
}

.exam-empty-desc {
    margin-top: 8px;
    color: #7b8b98;
    line-height: 1.7;
}

.exam-list {
    display: grid;
    gap: 16px;
}

.exam-list-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 18px;
    padding: 18px;
    border-radius: 20px;
    background: #f7fafc;
    border: 1px solid #e6edf2;
}

.exam-list-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
}

.exam-list-title-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.exam-list-title {
    margin: 0;
    font-size: 1.08rem;
    color: #233646;
}

.exam-list-subtitle {
    margin-top: 6px;
    color: #7b8b98;
    line-height: 1.6;
}

.exam-list-id {
    color: #8a98a4;
    font-size: 0.84rem;
    white-space: nowrap;
}

.exam-list-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
}

.exam-tag {
    padding: 7px 10px;
    border-radius: 999px;
    background: #edf4f7;
    color: #4a6678;
    font-size: 0.82rem;
}

.exam-breakdown-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.exam-breakdown-item {
    padding: 14px;
    border-radius: 16px;
    background: #fff;
    border: 1px solid #e7edf2;
    display: grid;
    gap: 4px;
}

.exam-breakdown-label {
    color: #7b8b98;
    font-size: 0.8rem;
}

.exam-breakdown-item strong {
    color: #233646;
    font-size: 1rem;
}

.exam-breakdown-item span:last-child {
    color: #718291;
    font-size: 0.82rem;
}

.exam-list-actions {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 10px;
    min-width: 104px;
}

.exam-editor-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 22px;
    align-items: start;
}

.exam-form {
    display: grid;
    gap: 22px;
}

.exam-form-section {
    padding: 20px;
    border-radius: 18px;
    background: #f7fafc;
    border: 1px solid #e7edf2;
}

.exam-form-section-title {
    margin-bottom: 16px;
    font-size: 1rem;
    font-weight: 700;
    color: #233646;
}

.exam-switch-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border-radius: 16px;
    background: #f1f7fa;
    border: 1px solid #dce8ef;
}

.exam-switch-copy {
    display: grid;
    gap: 4px;
}

.exam-switch-copy strong {
    color: #233646;
}

.exam-switch-copy small {
    color: #748592;
    line-height: 1.5;
}

.exam-prefix-input {
    max-width: 180px;
}

.exam-form-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.exam-editor-aside {
    display: grid;
    gap: 16px;
    position: sticky;
    top: 30px;
}

.exam-summary-card {
    padding: 20px;
}

.exam-summary-list {
    display: grid;
    gap: 14px;
    margin-top: 16px;
}

.exam-summary-item {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid #e8edf2;
    color: #6f8190;
}

.exam-summary-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.exam-summary-item strong {
    color: #233646;
    text-align: right;
}

.exam-tip-list {
    margin: 16px 0 0;
    padding-left: 18px;
    color: #6f8190;
    line-height: 1.8;
}

.admin-workspace {
    display: grid;
    gap: 24px;
}

.admin-overview {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) minmax(300px, 0.9fr);
    gap: 18px;
    padding: 26px 28px;
    border-radius: 24px;
    background: linear-gradient(135deg, #223746 0%, #2c495c 58%, #34566b 100%);
    color: #fff;
    box-shadow: 0 22px 40px rgba(31, 52, 71, 0.16);
}

.admin-kicker {
    display: inline-flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
    color: rgba(255, 255, 255, 0.86);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.admin-overview-copy h2 {
    margin: 14px 0 10px;
    font-size: 2rem;
    line-height: 1.2;
    color: #fff;
}

.admin-overview-copy p {
    margin: 0;
    max-width: 56ch;
    color: rgba(255, 255, 255, 0.76);
    line-height: 1.75;
}

.admin-overview-meta {
    display: grid;
    gap: 14px;
}

.admin-overview-card {
    padding: 18px 18px 16px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.admin-overview-label {
    color: rgba(255, 255, 255, 0.58);
    font-size: 0.8rem;
    margin-bottom: 10px;
}

.admin-overview-value {
    font-size: 1.45rem;
    font-weight: 700;
    line-height: 1.2;
}

.admin-overview-sub {
    margin-top: 8px;
    color: rgba(255, 255, 255, 0.74);
    line-height: 1.6;
    font-size: 0.88rem;
}

.admin-stat-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.admin-stat-card,
.admin-panel,
.admin-summary-card,
.admin-note-card {
    background: linear-gradient(180deg, #ffffff 0%, #f9fbfc 100%);
    border: 1px solid rgba(224, 230, 235, 0.9);
    border-radius: 22px;
    box-shadow: 0 16px 30px rgba(31, 52, 71, 0.06);
}

.admin-stat-card {
    padding: 20px 20px 18px;
}

.admin-stat-label {
    color: #7b8b98;
    font-size: 0.84rem;
}

.admin-stat-value {
    margin-top: 10px;
    font-size: 2rem;
    font-weight: 700;
    color: #233646;
    line-height: 1;
}

.admin-stat-desc {
    margin-top: 10px;
    color: #748592;
    font-size: 0.88rem;
    line-height: 1.6;
}

.admin-panel {
    padding: 22px;
}

.admin-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.admin-panel-title,
.admin-summary-title,
.admin-note-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #233646;
}

.admin-panel-desc,
.admin-note-text {
    margin-top: 6px;
    color: #7b8b98;
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 62ch;
}

.admin-empty-state {
    padding: 36px 18px 12px;
    text-align: center;
}

.admin-empty-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #233646;
}

.admin-empty-desc {
    margin-top: 8px;
    color: #7b8b98;
    line-height: 1.7;
}

.admin-split-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 22px;
    align-items: start;
}

.admin-form {
    display: grid;
    gap: 22px;
}

.admin-form-section {
    padding: 20px;
    border-radius: 18px;
    background: #f7fafc;
    border: 1px solid #e7edf2;
}

.admin-form-section-title {
    margin-bottom: 16px;
    font-size: 1rem;
    font-weight: 700;
    color: #233646;
}

.admin-form-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.admin-side-stack {
    display: grid;
    gap: 16px;
    position: sticky;
    top: 30px;
}

.admin-summary-card {
    padding: 20px;
}

.admin-summary-list {
    display: grid;
    gap: 14px;
    margin-top: 16px;
}

.admin-summary-item {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid #e8edf2;
    color: #6f8190;
}

.admin-summary-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.admin-summary-item strong {
    color: #233646;
    text-align: right;
}

.admin-tip-list,
.admin-note-list {
    margin: 16px 0 0;
    padding-left: 18px;
    color: #6f8190;
    line-height: 1.8;
}

.admin-note-card {
    padding: 22px;
}

.admin-note-warning {
    border-color: rgba(243, 156, 18, 0.26);
    background: linear-gradient(180deg, #fffdf7 0%, #fffaf0 100%);
}

.admin-tag {
    padding: 7px 10px;
    border-radius: 999px;
    background: #edf4f7;
    color: #4a6678;
    font-size: 0.82rem;
}

.activity-list {
    display: grid;
    gap: 16px;
}

.activity-list-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 18px;
    padding: 18px;
    border-radius: 20px;
    background: #f7fafc;
    border: 1px solid #e6edf2;
}

.activity-list-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
}

.activity-list-title-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.activity-list-title {
    margin: 0;
    font-size: 1.08rem;
    color: #233646;
}

.activity-list-subtitle {
    margin-top: 6px;
    color: #7b8b98;
    line-height: 1.6;
}

.activity-list-id {
    color: #8a98a4;
    font-size: 0.84rem;
    white-space: nowrap;
    font-family: Consolas, "Courier New", monospace;
}

.activity-list-tags,
.bank-question-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
}

.activity-metric-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.activity-metric-item {
    padding: 14px;
    border-radius: 16px;
    background: #fff;
    border: 1px solid #e7edf2;
    display: grid;
    gap: 4px;
}

.activity-metric-label {
    color: #7b8b98;
    font-size: 0.8rem;
}

.activity-metric-item strong {
    color: #233646;
    font-size: 1rem;
}

.activity-metric-item span:last-child {
    color: #718291;
    font-size: 0.82rem;
}

.activity-list-actions {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 10px;
    min-width: 112px;
}

.users-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.users-filter-form,
.cert-search-form {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    flex: 1;
}

.users-filter-form .form-control {
    max-width: 280px;
}

.users-table-panel,
.users-toolbar-panel {
    padding-bottom: 18px;
}

.admin-table-shell {
    background: transparent;
    box-shadow: none;
    border: none;
}

.admin-table-scroll {
    max-height: calc(100vh - 320px);
}

.admin-data-table th {
    background: #f3f7f9;
}

.admin-data-table tr:hover td {
    background: #f8fbfc;
}

.bank-manager {
    align-items: start;
    height: auto;
}

.bank-category-panel,
.bank-content-panel {
    padding: 20px;
}

.bank-panel-header {
    margin-bottom: 14px;
}

.bank-content-header {
    margin-bottom: 18px;
}

.bank-toolbar,
.cert-toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.bank-toolbar .btn,
.cert-toolbar .btn {
    white-space: nowrap;
}

.cert-record-header {
    margin-bottom: 16px;
}

.cert-search-form .form-control {
    min-width: 180px;
    max-width: 220px;
}

.record-list-area .table-container {
    max-height: calc(100vh - 360px);
}

.record-list-area .table th {
    position: sticky;
    top: 0;
    z-index: 2;
}

.activity-field-list {
    display: grid;
    gap: 16px;
}

.activity-field-card {
    padding: 18px;
    border-radius: 20px;
    background: #f7fafc;
    border: 1px solid #e6edf2;
}

.activity-field-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
}

.activity-field-title-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.activity-field-title {
    margin: 0;
    font-size: 1.05rem;
    color: #233646;
}

.activity-field-subtitle {
    margin-top: 6px;
    color: #7b8b98;
    line-height: 1.6;
}

.activity-field-sort {
    color: #8a98a4;
    font-size: 0.84rem;
    white-space: nowrap;
}

.activity-field-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
}

.activity-field-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.activity-field-preview-list {
    display: grid;
    gap: 14px;
    margin-top: 14px;
}

.activity-field-preview-item {
    padding: 14px 14px 2px;
    border-radius: 16px;
    background: #f7fafc;
    border: 1px solid #e7edf2;
}

.question-workbench-grid {
    display: grid;
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 22px;
    align-items: start;
}

.question-filter-list,
.question-exam-list,
.question-card-list,
.question-modal-options {
    display: grid;
    gap: 12px;
}

.question-filter-item,
.question-exam-item {
    width: 100%;
    border: 1px solid #e4ebf0;
    border-radius: 16px;
    background: #f7fafc;
    padding: 14px 16px;
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
    color: #324556;
    cursor: pointer;
    text-align: left;
    transition: all 0.25s ease;
}

.question-filter-item span,
.question-exam-name {
    font-weight: 600;
}

.question-filter-item strong {
    color: #4a6678;
}

.question-filter-item:hover,
.question-exam-item:hover,
.question-filter-item.active,
.question-exam-item.active {
    border-color: rgba(74, 144, 164, 0.4);
    background: #eef6f8;
    box-shadow: 0 12px 24px rgba(31, 52, 71, 0.06);
}

.question-exam-item {
    display: grid;
    justify-content: stretch;
}

.question-exam-meta {
    color: #7b8b98;
    font-size: 0.82rem;
}

.question-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.question-toolbar-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.question-select-all {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #6f8190;
    font-size: 0.9rem;
}

.question-workbench-card {
    padding: 18px;
    border-radius: 20px;
    background: #f7fafc;
    border: 1px solid #e6edf2;
    display: grid;
    gap: 14px;
}

.question-workbench-head,
.question-workbench-meta {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    flex-wrap: wrap;
}

.question-workbench-meta {
    justify-content: flex-start;
    align-items: center;
}

.question-check {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #6f8190;
    font-size: 0.88rem;
}

.question-type-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 5px 11px;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
}

.question-type-pill.type-single {
    background: rgba(52, 152, 219, 0.12);
    color: #2879ad;
}

.question-type-pill.type-multiple {
    background: rgba(155, 89, 182, 0.12);
    color: #8a4aac;
}

.question-type-pill.type-truefalse {
    background: rgba(39, 174, 96, 0.12);
    color: #20794b;
}

.question-workbench-title {
    color: #233646;
    font-size: 1.02rem;
    font-weight: 700;
    line-height: 1.7;
}

.question-workbench-excerpt {
    color: #728391;
    line-height: 1.7;
}

.question-option-list {
    display: grid;
    gap: 10px;
}

.question-option-item {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 12px;
    align-items: start;
    padding: 12px 14px;
    border-radius: 14px;
    background: #fff;
    border: 1px solid #e8edf2;
}

.question-option-item.is-correct {
    border-color: rgba(39, 174, 96, 0.28);
    background: #f4fcf7;
}

.question-option-key {
    min-width: 24px;
    font-weight: 700;
    color: #4a6678;
}

.question-option-text {
    color: #324556;
    line-height: 1.7;
}

.question-option-flag {
    color: #20794b;
    font-size: 0.82rem;
    font-weight: 700;
}

.question-option-editor-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    align-items: center;
}

.question-option-editor-field {
    display: grid;
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 10px;
    align-items: center;
}

.question-option-editor-key {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 42px;
    border-radius: 12px;
    background: #edf4f7;
    color: #4a6678;
    font-weight: 700;
}

.question-answer-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.question-answer-item,
.question-answer-inline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #4a5f70;
}

.question-answer-item {
    padding: 12px 14px;
    border: 1px solid #e6edf2;
    border-radius: 14px;
    background: #f7fafc;
}

.alias-table-shell {
    display: grid;
    gap: 14px;
}

.alias-compact-table th,
.alias-compact-table td {
    padding: 10px 12px !important;
    vertical-align: middle;
}

.alias-pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    padding-top: 4px;
}

.alias-pagination-info {
    color: #7b8b98;
    font-size: 0.84rem;
}

.alias-pagination-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.alias-unmapped-list {
    display: grid;
    gap: 12px;
    margin-top: 14px;
    max-height: 520px;
    overflow-y: auto;
}

.alias-unmapped-item {
    display: grid;
    gap: 10px;
    padding: 14px;
    border-radius: 16px;
    background: #f7fafc;
    border: 1px solid #e7edf2;
}

.alias-unmapped-name {
    color: #233646;
    font-weight: 700;
}

.alias-unmapped-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
}

.answer-detail-actions {
    display: flex;
    justify-content: flex-end;
}

.answer-overview .admin-overview-sub {
    word-break: break-word;
}

/* ==================== 标签页 ==================== */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 24px;
}

.tab-item {
    padding: 12px 24px;
    color: var(--gray-color);
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.3s ease;
}

.tab-item:hover {
    color: var(--primary-color);
}

.tab-item.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .page-wrapper.admin-layout {
        flex-direction: column;
    }

    /* ---- 移动端头部：紧凑单行 + 抽屉导航 ---- */
    .header {
        position: sticky;
        top: 0;
        z-index: 1000;
    }

    .header-inner {
        padding: 0 12px;
        height: 50px;
        min-height: auto;
    }

    /* Logo缩小 */
    .logo {
        font-size: 1rem;
        font-weight: 700;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 140px;
    }

    /* 导航默认隐藏，用汉堡按钮触发 */
    .header-nav {
        display: none;
        position: fixed;
        top: 50px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(255,255,255,0.97);
        flex-direction: column;
        gap: 0;
        padding: 15px 0;
        z-index: 999;
        box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    }

    .header-nav.show {
        display: flex;
    }

    .nav-link {
        color: var(--text-color);
        font-size: 1rem;
        padding: 14px 24px;
        border-bottom: 1px solid #f0f0f0;
        text-align: center;
    }
    .nav-link:hover,
    .nav-link.active {
        color: var(--primary-color);
        background: #f8fbfc;
    }
    .nav-link::after {
        display: none; /* 移动端隐藏下划线 */
    }

    /* 汉堡菜单按钮 - 新增 */
    .mobile-menu-btn {
        display: flex !important;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        border-radius: 8px;
        border: none;
        background: rgba(255,255,255,0.2);
        cursor: pointer;
        flex-direction: column;
        gap: 4px;
        padding: 8px 6px;
        box-sizing: border-box;
    }
    .mobile-menu-btn span {
        display: block;
        width: 18px;
        height: 2px;
        background: white;
        border-radius: 2px;
        transition: all 0.25s ease;
    }
    .mobile-menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
    .mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
    .mobile-menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px); }

    /* 用户区域精简 */
    .user-info {
        gap: 6px;
    }
    .user-name {
        font-size: 0.82rem;
        max-width: 70px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .user-dropdown {
        left: auto;
        right: -10px;
        min-width: 140px;
    }
    .btn.btn-sm {
        font-size: 0.78rem;
        padding: 5px 12px;
    }

    /* 遮罩层 */
    .mobile-nav-overlay {
        display: none;
        position: fixed;
        top: 50px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.35);
        z-index: 998;
    }
    .mobile-nav-overlay.show {
        display: block;
    }
    
    .exam-card-footer {
        flex-direction: column;
    }
    
    .exam-card-footer .btn {
        width: 100%;
    }
    
    .exam-card-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .exam-status-badge {
        position: static;
        margin-top: 8px;
    }
    
    .admin-sidebar {
        width: 100%;
        position: relative;
        min-height: auto;
        padding: 14px;
    }
    
    .admin-main {
        margin-left: 0;
    }

    .admin-page-header {
        padding: 16px 18px;
    }

    .admin-overview {
        grid-template-columns: 1fr;
        padding: 22px 20px;
    }

    .admin-overview-copy h2 {
        font-size: 1.7rem;
    }

    .admin-stat-grid,
    .activity-metric-grid,
    .exam-breakdown-grid {
        grid-template-columns: 1fr;
    }

    .admin-split-grid,
    .exam-editor-grid,
    .question-workbench-grid {
        grid-template-columns: 1fr;
    }

    .admin-side-stack,
    .exam-editor-aside {
        position: static;
    }

    .activity-list-card,
    .exam-list-card {
        grid-template-columns: 1fr;
    }

    .activity-list-actions,
    .exam-list-actions {
        min-width: 0;
    }

    .users-toolbar,
    .bank-toolbar,
    .cert-toolbar,
    .users-filter-form,
    .cert-search-form,
    .question-toolbar,
    .question-workbench-head,
    .question-workbench-meta {
        flex-direction: column;
        align-items: stretch;
    }

    .users-filter-form .form-control,
    .cert-search-form .form-control {
        max-width: none;
        min-width: 0;
    }

    .question-option-item,
    .question-option-editor-row,
    .question-option-editor-field,
    .alias-unmapped-actions {
        grid-template-columns: 1fr;
    }

    .question-answer-grid {
        grid-template-columns: 1fr;
    }

    .activity-field-top {
        flex-direction: column;
    }

    .answer-detail-actions {
        justify-content: stretch;
    }

    .answer-detail-actions .print-btn {
        width: 100%;
    }
    
    .stat-card {
        flex-direction: column;
        text-align: center;
    }
    
    .modal {
        width: 95%;
    }
}

/* ==================== 工具类 ==================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-primary { color: var(--primary-color); }
.text-success { color: var(--success-color); }
.text-danger { color: var(--danger-color); }
.text-warning { color: var(--warning-color); }
.text-muted { color: var(--gray-color); }
.text-info { color: var(--info-color); }
.text-purple { color: #9B59B6; }

.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }

.pt-1 { padding-top: 10px; }
.pt-2 { padding-top: 20px; }
.pt-3 { padding-top: 30px; }
.pb-1 { padding-bottom: 10px; }
.pb-2 { padding-bottom: 20px; }
.pb-3 { padding-bottom: 30px; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 10px; }
.gap-2 { gap: 20px; }

.hidden { display: none; }
.visible { visibility: visible; }
.invisible { visibility: hidden; }

/* ==================== 加载动画 ==================== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--light-gray);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* 间距工具类 */
.ml-1 { margin-left: 10px; }
.ml-2 { margin-left: 20px; }
.mr-1 { margin-right: 10px; }
.mr-2 { margin-right: 20px; }

/* 边框样式 */
.border { border: 1px solid var(--border-color); }
.border-2 { border: 2px solid var(--border-color); }

/* 轮廓按钮 */
.btn-outline-primary {
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 6px 12px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}
.btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
}