/* 学生端通用 UI 样式：按钮 / 输入 / 卡片 / 标签等
 * 说明：
 * - 只提供通用 class，不覆盖现有 portal 样式；
 * - 所有配色优先使用后台主题变量 (--um-* / --admin-*)，并提供合理兜底色值；
 * - 后续各学生端页面可逐步改用这些通用 class，便于统一调整。*/

/* ========== 页面级背景与基础文字颜色（基于主题变量） ========== */

.portal-page {
    background: var(--um-bg-primary);
    color: var(--um-text-primary);
}

/* ========== 通用卡片 ========== */

.student-card {
    border-radius: 12px;
    padding: 10px 12px;
    background: var(--um-bg-panel);
    border: 1px solid var(--um-border);
    box-shadow: var(--um-shadow);
    box-sizing: border-box;
}

.student-card--dense {
    padding: 8px 10px;
    border-radius: 10px;
}

.student-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 6px;
}

.student-card__title {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--um-text-primary);
}

.student-card__subtitle {
    margin: 0;
    font-size: 12px;
    color: var(--um-text-secondary);
}

.student-card__body {
    font-size: 13px;
    color: var(--um-text-primary);
}

/* ========== 公告卡片（学生端首页） ========== */

/* 卡片头部：图标 + 文字 + 数量徽章 */
.portal-announcement-card .student-card__header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--um-border);
}

.portal-announcement-card__header-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--um-accent), var(--um-accent-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.portal-announcement-card__header-icon svg {
    width: 20px;
    height: 20px;
    color: var(--um-text-on-accent);
}

.portal-announcement-card__header-text {
    flex: 1;
    min-width: 0;
}

.portal-announcement-card__header-text .student-card__title {
    font-size: 15px;
    font-weight: 600;
}

.portal-announcement-card__count {
    flex-shrink: 0;
}

/* 公告卡片头部操作区域 */
.portal-announcement-card__header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

/* 联系班级管理员按钮 - 醒目风格 */
.portal-contact-admin-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    font-size: 13px;
    font-weight: 500;
    color: #fff;
    background: linear-gradient(135deg, var(--um-accent, #6366f1) 0%, #8b5cf6 100%);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
    white-space: nowrap;
}

.portal-contact-admin-btn:hover {
    color: #fff;
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.portal-contact-admin-btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* 公告列表 */
.portal-announcement-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* 单条公告项 */
.portal-announcement-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 10px;
    background: var(--um-bg-secondary);
    border: 1px solid transparent;
    transition: all 0.2s ease;
    cursor: default;
}

.portal-announcement-item:hover {
    background: var(--um-bg-hover);
    border-color: var(--um-border);
    transform: translateX(2px);
}

/* 左侧指示条 */
.portal-announcement-item__indicator {
    width: 3px;
    height: 100%;
    min-height: 32px;
    border-radius: 2px;
    background: linear-gradient(180deg, var(--um-accent), var(--um-accent-hover));
    flex-shrink: 0;
    align-self: stretch;
}

/* 主内容区 */
.portal-announcement-item__main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* 标题行：标题 + 时间 */
.portal-announcement-item__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.portal-announcement-item__title {
    font-weight: 600;
    font-size: 13px;
    color: var(--um-text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.portal-announcement-item__date {
    font-size: 11px;
    color: var(--um-text-secondary);
    flex-shrink: 0;
    padding: 2px 6px;
    background: var(--um-bg-panel);
    border-radius: 4px;
}

/* 摘要 */
.portal-announcement-item__summary {
    font-size: 12px;
    color: var(--um-text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: 1.4;
}

/* 元数据行：生效时间 + 到期时间 */
.portal-announcement-item__meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 4px;
    flex-wrap: wrap;
}

.portal-announcement-item__meta-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--um-text-secondary);
}

.portal-announcement-item__meta-item svg {
    width: 12px;
    height: 12px;
    opacity: 0.7;
}

.portal-announcement-item__meta-item--expires {
    color: var(--um-warning);
}

.portal-announcement-item__meta-item--expires svg {
    opacity: 1;
}

/* 即将到期徽章 */
.portal-announcement-item__badge {
    font-size: 10px;
    padding: 2px 6px;
    animation: pulse-warning 2s ease-in-out infinite;
}

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

/* 查看按钮 */
.portal-announcement-item__btn {
    flex-shrink: 0;
    align-self: center;
}

.portal-announcement-item__btn svg {
    width: 14px;
    height: 14px;
}

/* 空状态 */
.portal-announcement-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 24px 16px;
    color: var(--um-text-secondary);
    font-size: 13px;
}

.portal-announcement-empty svg {
    width: 32px;
    height: 32px;
    opacity: 0.5;
}

/* 响应式：移动端 */
@media (max-width: 640px) {
    .portal-announcement-card .student-card__header {
        flex-wrap: wrap;
        gap: 8px;
    }

    .portal-announcement-card__header-text {
        flex: 1 1 100%;
        min-width: 0;
    }

    .portal-announcement-card__header-actions {
        width: 100%;
        justify-content: flex-end;
        flex-wrap: wrap;
    }

    .portal-contact-admin-btn {
        width: 100%;
        justify-content: center;
    }

    .portal-announcement-card__header-icon {
        width: 32px;
        height: 32px;
    }

    .portal-announcement-card__header-icon svg {
        width: 18px;
        height: 18px;
    }

    .portal-announcement-item {
        flex-direction: column;
        align-items: stretch;
    }

    .portal-announcement-item__indicator {
        width: 100%;
        height: 3px;
        min-height: auto;
    }

    .portal-announcement-item__header {
        flex-wrap: wrap;
    }

    .portal-announcement-item__title {
        white-space: normal;
        overflow: visible;
    }

    .portal-announcement-item__summary {
        white-space: normal;
        overflow: visible;
    }

    .portal-announcement-item__btn {
        align-self: flex-end;
        margin-top: 8px;
    }
}

/* 公告弹窗：富文本在白底编辑，因此展示也用白底，避免主题色干扰 */
.portal-announcement-modal .portal-modal__dialog {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.08);
}

.portal-announcement-modal .portal-modal__title,
.portal-announcement-modal .portal-modal__close {
    color: #111827;
}

.portal-announcement-modal .portal-modal__header {
    border-bottom-color: rgba(0, 0, 0, 0.08);
}

.portal-announcement-modal .portal-modal__body {
    color: #111827;
}

.portal-announcement-modal .portal-announcement-modal__content {
    background: #ffffff;
    color: #111827;
    font-size: 14px;
    line-height: 1.65;
}

.portal-announcement-modal .portal-announcement-modal__content a {
    color: #2563eb;
}

.portal-my-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.portal-my-col {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-width: 0;
}

@media (min-width: 992px) {
    .portal-my-grid {
        flex-direction: row;
        align-items: flex-start;
        gap: 16px;
    }

    .portal-my-col {
        flex: 1 1 0;
    }
}

/* ========== 通用按钮 ========== */

.student-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 9999px;
    border: 1px solid var(--um-border);
    background: var(--um-bg-secondary);
    color: var(--um-text-primary);
    font-size: 13px;
    line-height: 1.2;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease, transform 0.08s ease, border-color 0.15s ease;
    text-decoration: none;
}

.student-btn:hover {
    background: var(--um-bg-hover);
    border-color: var(--um-accent);
    box-shadow: var(--um-shadow);
    transform: translateY(-0.5px);
}

.student-btn:active {
    transform: translateY(0);
    box-shadow: var(--um-shadow);
}

.student-btn--primary {
    background: linear-gradient(135deg, var(--um-accent), var(--um-accent-hover));
    border-color: var(--um-accent);
    color: var(--um-text-on-accent);
    box-shadow: var(--um-shadow);
}

.student-btn--danger {
    background: linear-gradient(135deg, var(--um-danger), var(--um-danger));
    border-color: var(--um-danger);
    color: var(--um-text-primary);
}

.student-btn--warning {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    border-color: #d97706;
    color: #ffffff;
    box-shadow: var(--um-shadow);
}

.student-btn--warning:hover {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    border-color: #f59e0b;
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: var(--um-shadow), 0 0 8px rgba(245, 158, 11, 0.4);
}

.student-btn--ghost {
    background: transparent;
    border-color: var(--um-border);
    color: var(--um-text-secondary);
}

.student-btn--ghost:hover {
    background: var(--um-bg-hover);
    color: var(--um-text-primary);
}

/* 主按钮 hover：保持高对比的主题渐变，避免在浅色主题下文字与背景过于接近 */
.student-btn--primary:hover {
    background: linear-gradient(135deg, var(--um-accent-hover), var(--um-accent));
    border-color: var(--um-accent-hover);
    color: var(--um-text-on-accent);
    /* 比普通按钮略微抬高，并增加一圈主题色光晕，强化悬停反馈 */
    transform: translateY(-1px);
    box-shadow: var(--um-shadow), 0 0 0 1px var(--um-accent-hover);
}

.student-btn--sm {
    padding: 4px 10px;
    font-size: 12px;
}

.student-btn--lg {
    padding: 8px 16px;
    font-size: 14px;
}

.student-btn--full {
    width: 100%;
}

/* ========== 通用输入与选择控件 ========== */

.student-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 13px;
}

.student-label {
    font-size: 12px;
    color: var(--um-text-secondary);
}

.student-input,
.student-select,
.student-textarea {
    width: 100%;
    padding: 8px 10px;
    border-radius: 8px;
    border: 1px solid var(--um-border);
    background-color: var(--um-bg-panel);
    color: var(--um-text-primary);
    font-size: 13px;
    outline: none;
    box-sizing: border-box;
    transition: border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.student-input::placeholder,
.student-textarea::placeholder {
    color: var(--um-text-secondary);
}

.student-input:focus,
.student-select:focus,
.student-textarea:focus {
    border-color: var(--um-accent);
    box-shadow: 0 0 0 1px var(--um-accent);
    background-color: var(--um-bg-hover);
}

.student-input--pill,
.student-select--pill {
    border-radius: 9999px;
}

.student-input--inline {
    display: inline-flex;
    width: auto;
    min-width: 120px;
}

/* ========== 通用标签 / 徽章 ========== */

.student-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 2px 8px;
    border-radius: 9999px;
    font-size: 11px;
    border: 1px solid var(--um-border);
    color: var(--um-text-primary);
    background: var(--um-bg-secondary);
    white-space: nowrap;
}

.student-badge--accent {
    border-color: var(--um-accent);
    color: var(--um-accent);
}

.student-badge--success {
    border-color: var(--um-success);
    color: var(--um-success);
}

.student-badge--danger {
    border-color: var(--um-danger);
    color: var(--um-danger);
}

/* ========== 通用状态文本 ========== */

.student-status {
    font-size: 12px;
    color: var(--um-text-secondary);
}

.student-status--success {
    color: var(--um-success);
}

.student-status--error {
    color: var(--um-danger);
}

.student-status--warning {
    color: var(--admin-warning-color);
}

.student-status--info {
    color: var(--admin-accent-primary);
}

/* ========== 通用表格行 / 列表项容器 ========== */

.student-row {
    display: grid;
    align-items: center;
    padding: 6px 10px;
    border-radius: 10px;
    background: var(--um-bg-panel);
    border: 1px solid var(--um-border);
    box-shadow: var(--um-shadow);
}

.student-row--header {
    background: linear-gradient(90deg, var(--um-bg-panel), var(--um-accent));
    border-color: var(--um-accent);
    font-size: 12px;
    font-weight: 600;
}

.student-row--hoverable:hover {
    transform: translateY(-1px);
    box-shadow: var(--um-shadow);
    border-color: var(--um-accent);
}

.student-cell {
    font-size: 12px;
    color: var(--um-text-primary);
}

.student-cell--muted {
    color: var(--um-text-secondary);
}

.student-cell--actions {
    text-align: right;
}

/* ========== 通用弹窗面板壳子（答题/解释类弹窗可复用） ========== */

.student-modal-panel {
    position: relative;
    max-width: 960px;
    width: 90%;
    max-height: 90vh;
    background: var(--um-bg-panel);
    border-radius: 16px;
    border: 1px solid var(--um-border);
    box-shadow: var(--um-shadow);
    display: flex;
    flex-direction: column;
    padding: 14px 18px 12px;
    box-sizing: border-box;
}

.student-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
}

.student-modal-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--um-text-primary);
    margin: 0;
}

.student-modal-body {
    flex: 1 1 auto;
    overflow: auto;
    padding-right: 4px;
    font-size: 13px;
    color: var(--um-text-primary);
}

.student-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 10px;
}

/* ========== 页面标题 / 文本 / 信息列表 ========== */

.student-page-header-title {
	color: var(--um-text-primary);
}

.student-page-header-subtitle {
	color: var(--um-text-secondary);
}

.student-section-title {
	color: var(--um-text-primary);
}

.student-info-list {
	list-style: none;
	margin: 0;
	padding: 0;
}

.student-info-item {
	display: flex;
	justify-content: space-between;
	align-items: flex-start;
	padding: 6px 0;
	font-size: 14px;
	border-bottom: 1px dashed var(--um-border);
}

.student-info-label {
	color: var(--um-text-secondary);
}

.student-info-value {
	color: var(--um-text-primary);
	min-width: 0;
}

/* 我的页：按提供方（个人 Key 设置）大屏布局 */
@media (min-width: 992px) {
	.portal-my-provider-controls {
		display: grid;
		grid-template-columns: auto minmax(280px, 520px) auto auto;
		align-items: center;
		justify-content: end;
		gap: 8px;
	}

	.portal-my-provider-input {
		width: 100%;
	}

	.portal-my-provider-toggle {
		white-space: nowrap;
		cursor: pointer;
		user-select: none;
	}

	.portal-my-provider-hint {
		margin-top: 6px;
	}
}

/* 我的页：个人资料-编辑资料 大屏标准两列表单 */
@media (min-width: 992px) {
	.portal-my-profile-form {
		display: grid;
		grid-template-columns: 1fr 1fr;
		gap: 12px;
	}

	.portal-my-profile-form .student-field {
		margin-top: 0 !important;
	}

	.portal-my-profile-actions {
		display: flex;
		justify-content: flex-end;
	}

	.portal-my-profile-actions .student-btn {
		min-width: 180px;
	}
}

/* 我的页：账号信息 大屏标准两列“描述列表” */
@media (min-width: 992px) {
	.portal-my-account-info {
		display: grid;
		grid-template-columns: 1fr 1fr;
		gap: 0 16px;
	}

	.portal-my-account-info .student-info-item {
		border-bottom: 1px dashed var(--um-border);
		padding: 8px 0;
	}

	.portal-my-account-info .student-info-label {
		white-space: nowrap;
	}

	.portal-my-account-info .student-info-value {
		text-align: right;
		overflow: hidden;
		text-overflow: ellipsis;
		white-space: nowrap;
	}
}

body.theme-modern .portal-my-account-info .student-info-label {
	color: #334155;
}

body.theme-modern .portal-my-account-info .student-info-value {
	color: #0f172a;
}

.student-hint {
	font-size: 13px;
	color: var(--um-text-secondary);
	background: var(--um-bg-secondary);
	border-radius: 8px;
	padding: 10px 12px;
}

/* 通用空状态文本 */
.student-empty {
	font-size: 13px;
	color: var(--um-text-secondary);
}

/* ========== 入口页布局容器的主题配色覆盖 ========== */

.portal-header {
    background: var(--um-bg-panel);
    border-color: var(--um-border);
    box-shadow: var(--um-shadow);
}

.portal-tabs {
    background: var(--um-bg-panel);
    border-color: var(--um-border);
    box-shadow: var(--um-shadow);
}

.portal-tab {
    color: var(--um-text-primary);
}

.portal-tab:hover {
    background: var(--um-bg-hover);
}

.portal-tab.is-active {
    background: linear-gradient(135deg, var(--um-accent), var(--um-accent-hover));
    color: var(--um-bg-primary);
    box-shadow: var(--um-shadow);
}

.portal-more-menu {
    background: var(--um-bg-panel);
    border-color: var(--um-border);
    box-shadow: var(--um-shadow);
}

.portal-more-item {
    color: var(--um-text-primary);
}

.portal-more-item:hover {
    background: var(--um-bg-hover);
}

.portal-sidebar {
    background: var(--um-bg-panel);
    border-color: var(--um-border);
    box-shadow: var(--um-shadow);
}

.portal-sidebar-title {
    color: var(--admin-warning-color);
}

/* ========== 学习平台「其他功能」模式专用样式 ========== */

/* 整体卡片：与首页卡片保持一致，只做轻微间距调整 */
.portal-extras-card {
	margin-top: 4px;
}

/* 功能入口区域：多列自适应栅格布局 */
.portal-extras-body {
	display: flex;
	flex-wrap: wrap;
	gap: 12px;
	margin-top: 10px;
}

/* 单个功能入口卡片 */
.portal-extras-feature {
	flex: 1 1 260px;
	border-radius: 12px;
	padding: 12px 14px;
	background:
		linear-gradient(135deg, rgba(56,189,248,0.16), rgba(37,99,235,0.1)),
		var(--um-bg-panel);
	border: 1px solid var(--um-border);
	box-shadow: var(--um-shadow);
	display: flex;
	flex-direction: column;
	gap: 8px;
}

.portal-extras-feature .student-section-title {
	margin: 0;
	font-size: 15px;
}

.portal-extras-feature p {
	margin: 0;
	font-size: 13px;
	color: var(--um-text-secondary);
}

.portal-extras-feature .student-btn {
	margin-top: 8px;
	align-self: flex-start;
}

/* ========== 分类卡片样式 ========== */
.portal-extras-categories-grid {
	display: flex;
	flex-direction: column;
	gap: 12px;
	padding: 4px 0;
}

.portal-extras-category-card {
	display: flex;
	align-items: center;
	gap: 16px;
	padding: 16px 20px;
	border-radius: 12px;
	background: var(--um-bg-panel);
	border: 1px solid var(--um-border);
	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
	cursor: pointer;
	transition: all 0.2s ease;
}

.portal-extras-category-card:hover {
	transform: translateX(4px);
	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
	border-color: var(--um-primary, #3b82f6);
}

.portal-extras-category-icon {
	font-size: 32px;
	line-height: 1;
	flex-shrink: 0;
}

.portal-extras-category-info {
	flex: 1;
	min-width: 0;
}

.portal-extras-category-title {
	margin: 0 0 4px 0;
	font-size: 16px;
	font-weight: 600;
	color: var(--um-text);
}

.portal-extras-category-desc {
	margin: 0 0 6px 0;
	font-size: 13px;
	color: var(--um-text-secondary);
}

.portal-extras-category-count {
	display: inline-block;
	font-size: 12px;
	color: var(--um-primary, #3b82f6);
	background: rgba(59, 130, 246, 0.1);
	padding: 2px 8px;
	border-radius: 10px;
}

.portal-extras-category-arrow {
	font-size: 20px;
	color: var(--um-text-secondary);
	flex-shrink: 0;
	transition: transform 0.2s;
}

.portal-extras-category-card:hover .portal-extras-category-arrow {
	transform: translateX(4px);
	color: var(--um-primary, #3b82f6);
}

.portal-extras-empty-hint {
	text-align: center;
	padding: 40px 20px;
	color: var(--um-text-secondary);
	font-size: 14px;
}

/* ========== 二维码生成器样式 ========== */
.portal-qrcode {
	display: flex;
	flex-direction: column;
	align-items: center;
	padding: 20px;
	gap: 16px;
}

.portal-qrcode__input {
	width: 100%;
	max-width: 400px;
}

.portal-qrcode__input textarea {
	width: 100%;
	min-height: 80px;
	padding: 12px;
	border: 1px solid var(--um-border);
	border-radius: 8px;
	font-size: 14px;
	resize: vertical;
	background: var(--um-bg-panel);
	color: var(--um-text);
}

.portal-qrcode__input textarea:focus {
	outline: none;
	border-color: var(--um-primary, #3b82f6);
}

.portal-qrcode__preview {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 12px;
	padding: 20px;
	background: var(--um-bg-panel);
	border: 1px solid var(--um-border);
	border-radius: 12px;
}

.portal-qrcode__canvas {
	background: #fff;
	padding: 16px;
	border-radius: 8px;
}

.portal-qrcode__actions {
	display: flex;
	gap: 8px;
	flex-wrap: wrap;
	justify-content: center;
}

.portal-qrcode__hint {
	font-size: 12px;
	color: var(--um-text-secondary);
	text-align: center;
}

/* ========== 俄罗斯方块样式 ========== */
.portal-tetris {
	display: flex;
	flex-direction: row;
	gap: 24px;
	padding: 20px;
	justify-content: center;
	flex-wrap: wrap;
}

.portal-tetris__game {
	background: #1a1a2e;
	border-radius: 12px;
	padding: 8px;
	box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.portal-tetris__game canvas {
	display: block;
	border-radius: 4px;
}

.portal-tetris__info {
	display: flex;
	flex-direction: column;
	gap: 16px;
	min-width: 150px;
}

.portal-tetris__stat {
	background: var(--um-bg-panel);
	border: 1px solid var(--um-border);
	border-radius: 8px;
	padding: 12px 16px;
	text-align: center;
}

.portal-tetris__label {
	display: block;
	font-size: 12px;
	color: var(--um-text-secondary);
	margin-bottom: 4px;
}

.portal-tetris__value {
	display: block;
	font-size: 24px;
	font-weight: bold;
	color: var(--um-primary, #3b82f6);
}

.portal-tetris__controls {
	display: flex;
	flex-direction: column;
	gap: 8px;
}

.portal-tetris__help {
	background: var(--um-bg-panel);
	border: 1px solid var(--um-border);
	border-radius: 8px;
	padding: 12px;
	font-size: 12px;
	color: var(--um-text-secondary);
}

.portal-tetris__help p {
	margin: 4px 0;
}

@media (max-width: 600px) {
	.portal-tetris {
		flex-direction: column;
		align-items: center;
	}

	.portal-tetris__info {
		flex-direction: row;
		flex-wrap: wrap;
		justify-content: center;
		min-width: auto;
	}

	.portal-tetris__stat {
		min-width: 80px;
	}
}

/* ========== AI工具收集器样式 ========== */
.portal-ai-nav {
	padding: 24px;
	max-width: 1400px;
	margin: 0 auto;
}

/* 搜索框 */
.portal-ai-nav__search {
	margin-bottom: 28px;
	position: relative;
	max-width: 480px;
}

.portal-ai-nav__search input {
	width: 100%;
	padding: 14px 20px 14px 48px;
	border: 2px solid var(--um-border);
	border-radius: 16px;
	font-size: 15px;
	background: var(--um-bg-panel);
	color: var(--um-text-primary);
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.portal-ai-nav__search::before {
	content: '🔍';
	position: absolute;
	left: 18px;
	top: 50%;
	transform: translateY(-50%);
	font-size: 18px;
	opacity: 0.5;
	pointer-events: none;
}

.portal-ai-nav__search input:focus {
	outline: none;
	border-color: var(--um-accent, #3b82f6);
	box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}

.portal-ai-nav__search input::placeholder {
	color: var(--um-text-secondary);
}

/* 分类列表 */
.portal-ai-nav__categories {
	display: flex;
	flex-direction: column;
	gap: 32px;
}

/* 分类卡片 */
.portal-ai-nav__category {
	background: var(--um-bg-panel);
	border: 1px solid var(--um-border);
	border-radius: 20px;
	overflow: hidden;
	transition: box-shadow 0.3s ease;
}

.portal-ai-nav__category:hover {
	box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

/* 分类头部 */
.portal-ai-nav__category-header {
	display: flex;
	align-items: center;
	gap: 14px;
	padding: 20px 24px;
	background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(139, 92, 246, 0.08));
	border-bottom: 1px solid var(--um-border);
	position: relative;
}

.portal-ai-nav__category-header::after {
	content: '';
	position: absolute;
	bottom: 0;
	left: 0;
	right: 0;
	height: 1px;
	background: linear-gradient(90deg, transparent, var(--um-accent, #3b82f6), transparent);
	opacity: 0.3;
}

.portal-ai-nav__category-icon {
	font-size: 28px;
	filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.portal-ai-nav__category-name {
	font-size: 18px;
	font-weight: 700;
	color: var(--um-text-primary);
	letter-spacing: 0.02em;
}

.portal-ai-nav__category-count {
	margin-left: auto;
	font-size: 13px;
	font-weight: 500;
	color: var(--um-accent, #3b82f6);
	background: rgba(59, 130, 246, 0.12);
	padding: 6px 14px;
	border-radius: 20px;
}

/* 工具网格 */
.portal-ai-nav__tools {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
	gap: 16px;
	padding: 20px 24px 24px;
	max-width: 100%;
}

/* 大屏幕优化：限制每行最多卡片数 */
@media (min-width: 1600px) {
	.portal-ai-nav__tools {
		grid-template-columns: repeat(5, 1fr);
		max-width: 1400px;
		margin: 0 auto;
	}
}

@media (min-width: 1200px) and (max-width: 1599px) {
	.portal-ai-nav__tools {
		grid-template-columns: repeat(4, 1fr);
	}
}

@media (min-width: 900px) and (max-width: 1199px) {
	.portal-ai-nav__tools {
		grid-template-columns: repeat(3, 1fr);
	}
}

/* 工具卡片 */
.portal-ai-nav__tool {
	display: flex;
	flex-direction: column;
	gap: 8px;
	padding: 16px 18px;
	background: var(--um-bg-panel);
	border: 1px solid var(--um-border);
	border-radius: 14px;
	text-decoration: none;
	transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
	position: relative;
	overflow: hidden;
}

.portal-ai-nav__tool::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 3px;
	background: linear-gradient(90deg, var(--um-accent, #3b82f6), #8b5cf6);
	opacity: 0;
	transition: opacity 0.25s ease;
}

.portal-ai-nav__tool:hover {
	border-color: var(--um-accent, #3b82f6);
	transform: translateY(-4px);
	box-shadow: 0 12px 28px rgba(59, 130, 246, 0.15);
	background: var(--um-bg-hover, var(--um-bg-panel));
}

.portal-ai-nav__tool:hover::before {
	opacity: 1;
}

/* 工具名称 */
.portal-ai-nav__tool-name {
	font-size: 15px;
	font-weight: 600;
	color: var(--um-text-primary);
	display: flex;
	align-items: center;
	gap: 8px;
}

/* 国内/国外标签 */
.portal-ai-nav__tool-name::after {
	content: attr(data-region);
	font-size: 10px;
	font-weight: 500;
	padding: 2px 6px;
	border-radius: 4px;
	margin-left: auto;
	flex-shrink: 0;
}

.portal-ai-nav__tool[data-region="国内"] .portal-ai-nav__tool-name::after {
	content: '国内';
	background: rgba(34, 197, 94, 0.15);
	color: #22c55e;
}

.portal-ai-nav__tool[data-region="国外"] .portal-ai-nav__tool-name::after {
	content: '国外';
	background: rgba(59, 130, 246, 0.15);
	color: #3b82f6;
}

/* 工具描述 */
.portal-ai-nav__tool-desc {
	font-size: 13px;
	color: var(--um-text-secondary);
	line-height: 1.5;
	display: -webkit-box;
	-webkit-line-clamp: 2;
	line-clamp: 2;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

/* 外部链接指示 */
.portal-ai-nav__tool::after {
	content: '↗';
	position: absolute;
	top: 12px;
	right: 12px;
	font-size: 14px;
	color: var(--um-text-secondary);
	opacity: 0;
	transition: opacity 0.2s ease;
}

.portal-ai-nav__tool:hover::after {
	opacity: 0.6;
}

 .portal-geogebra {
	padding: 16px;
 }

 .portal-geogebra__open {
	margin-top: 10px;
 }

 .portal-geogebra__loading {
	display: flex;
	align-items: center;
	gap: 12px;
	padding: 12px 14px;
	margin-bottom: 12px;
	border: 1px solid var(--um-border);
	border-radius: 12px;
	background: var(--um-bg-panel);
	color: var(--um-text-secondary);
 }

 .portal-geogebra__loading.is-error {
	color: #ef4444;
	border-color: rgba(239, 68, 68, 0.35);
	background: rgba(239, 68, 68, 0.06);
 }

 .portal-geogebra__spinner {
	width: 18px;
	height: 18px;
	border-radius: 50%;
	border: 2px solid rgba(59, 130, 246, 0.25);
	border-top-color: var(--um-accent, #3b82f6);
	animation: portal-geogebra-spin 0.9s linear infinite;
	flex: 0 0 auto;
 }

 .portal-geogebra__loading.is-error .portal-geogebra__spinner {
	border-color: rgba(239, 68, 68, 0.25);
	border-top-color: #ef4444;
 }

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

 .portal-geogebra__frame {
	width: 100%;
	height: min(75vh, 820px);
	border: 1px solid var(--um-border);
	border-radius: 16px;
	background: var(--um-bg-panel);
 }

 .portal-jsxgraph {
	padding: 16px;
 }

 .portal-jsxgraph__toolbar {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	margin-bottom: 12px;
 }

 .portal-jsxgraph__btn {
	padding: 8px 12px;
	border-radius: 10px;
 }

 .portal-jsxgraph__wrap {
	border: 1px solid var(--um-border);
	border-radius: 16px;
	background: var(--um-bg-panel);
	overflow: hidden;
 }

 .portal-jsxgraph__box {
	width: 100%;
	height: min(70vh, 760px);
 }

 .portal-jsxgraph__status {
	padding: 10px 12px;
	border-top: 1px solid var(--um-border);
	font-size: 13px;
	color: var(--um-text-secondary);
 }

/* ========== Monaco IDE 风格编辑器 ========== */
 .monaco-ide {
	display: flex;
	flex-direction: column;
	height: calc(100vh - 120px);
	min-height: 500px;
	background: var(--um-bg-panel);
	border-radius: 16px;
	overflow: hidden;
	box-shadow: 0 4px 24px rgba(0,0,0,0.08);
 }

 .monaco-ide__titlebar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 0 16px;
	height: 48px;
	background: linear-gradient(180deg, rgba(255,255,255,0.08) 0%, transparent 100%);
	border-bottom: 1px solid var(--um-border);
 }

 .monaco-ide__titlebar-left {
	display: flex;
	align-items: center;
	gap: 12px;
 }

 .monaco-ide__back {
	width: 32px;
	height: 32px;
	border: none;
	border-radius: 8px;
	background: transparent;
	color: var(--um-text-secondary);
	font-size: 18px;
	cursor: pointer;
	transition: all 0.2s;
 }

 .monaco-ide__back:hover {
	background: var(--um-bg-hover);
	color: var(--um-text-primary);
 }

 .monaco-ide__title {
	font-size: 15px;
	font-weight: 600;
	color: var(--um-text-primary);
 }

 .monaco-ide__titlebar-right {
	display: flex;
	align-items: center;
	gap: 12px;
 }

 .monaco-ide__lang-select {
	padding: 6px 12px;
	border-radius: 8px;
	border: 1px solid var(--um-border);
	background: var(--um-bg-panel);
	color: var(--um-text-primary);
	font-size: 13px;
	cursor: pointer;
 }

 .monaco-ide__toolbar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 8px 16px;
	background: var(--um-bg-panel);
	border-bottom: 1px solid var(--um-border);
 }

 .monaco-ide__toolbar-left,
 .monaco-ide__toolbar-right {
	display: flex;
	align-items: center;
	gap: 8px;
 }

 .monaco-ide__btn {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	padding: 7px 14px;
	border: none;
	border-radius: 8px;
	font-size: 13px;
	font-weight: 500;
	cursor: pointer;
	transition: all 0.2s;
 }

 .monaco-ide__btn--run {
	background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
	color: white;
 }

 .monaco-ide__btn--run:hover {
	transform: translateY(-1px);
	box-shadow: 0 4px 12px rgba(34, 197, 94, 0.4);
 }

 .monaco-ide__btn--secondary {
	background: var(--um-bg-panel);
	color: var(--um-text-secondary);
	border: 1px solid var(--um-border);
 }

 .monaco-ide__btn--secondary:hover {
	background: var(--um-bg-hover);
	color: var(--um-text-primary);
 }

 .monaco-ide__theme-select {
	padding: 6px 12px;
	border-radius: 8px;
	border: 1px solid var(--um-border);
	background: var(--um-bg-panel);
	color: var(--um-text-primary);
	font-size: 13px;
	cursor: pointer;
 }

 .monaco-ide__main {
	display: flex;
	flex: 1;
	overflow: hidden;
 }

 .monaco-ide__editor-pane {
	flex: 1;
	display: flex;
	flex-direction: column;
	min-width: 0;
 }

 .monaco-ide__editor {
	flex: 1;
	min-height: 0;
 }

 .monaco-ide__loading {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 12px;
	background: var(--um-bg-panel);
	color: var(--um-text-secondary);
	z-index: 10;
 }

 .monaco-ide__loading-spinner {
	width: 20px;
	height: 20px;
	border-radius: 50%;
	border: 2px solid rgba(59, 130, 246, 0.25);
	border-top-color: #3b82f6;
	animation: monaco-ide-spin 0.8s linear infinite;
 }

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

 .monaco-ide__output-pane {
	width: 320px;
	display: flex;
	flex-direction: column;
	border-left: 1px solid var(--um-border);
	background: #1e1e1e;
 }

 .monaco-ide__output-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 10px 14px;
	background: #252526;
	border-bottom: 1px solid #3c3c3c;
 }

 .monaco-ide__output-title {
	font-size: 12px;
	font-weight: 600;
	color: #cccccc;
	text-transform: uppercase;
	letter-spacing: 0.5px;
 }

 .monaco-ide__output-clear {
	padding: 4px 8px;
	border: none;
	border-radius: 4px;
	background: transparent;
	color: #888;
	font-size: 11px;
	cursor: pointer;
 }

 .monaco-ide__output-clear:hover {
	background: #3c3c3c;
	color: #ccc;
 }

 .monaco-ide__output-content {
	flex: 1;
	overflow: auto;
	padding: 12px;
	font-family: 'Fira Code', 'Cascadia Code', Consolas, monospace;
	font-size: 13px;
	line-height: 1.6;
 }

 .monaco-ide__output-placeholder {
	color: #666;
	font-style: italic;
 }

 .monaco-ide__output-line {
	white-space: pre-wrap;
	word-break: break-all;
 }

 .monaco-ide__output-line--info { color: #9cdcfe; }
 .monaco-ide__output-line--log { color: #4ec9b0; }
 .monaco-ide__output-line--warn { color: #dcdcaa; }
 .monaco-ide__output-line--error { color: #f14c4c; }
 .monaco-ide__output-line--success { color: #89d185; }
 .monaco-ide__output-line--result { color: #ce9178; font-style: italic; }

 .monaco-ide__preview-frame {
	width: 100%;
	height: 100%;
	border: none;
	background: white;
 }

 .monaco-ide__error {
	padding: 40px;
	text-align: center;
	color: #ef4444;
	font-size: 14px;
 }

/* 响应式 */
@media (max-width: 900px) {
	.monaco-ide__main {
		flex-direction: column;
	}

	.monaco-ide__output-pane {
		width: 100%;
		height: 200px;
		border-left: none;
		border-top: 1px solid var(--um-border);
	}
}

/* ========== Monaco Editor 进度条样式 ========== */
.monaco-ide__progress-container {
	padding: 24px;
	background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
	border-radius: 8px;
	margin: 8px 0;
}

.monaco-ide__progress-header {
	display: flex;
	align-items: center;
	gap: 12px;
	margin-bottom: 16px;
}

.monaco-ide__progress-icon {
	font-size: 24px;
	animation: monaco-spin 2s linear infinite;
}

@keyframes monaco-spin {
	from { transform: rotate(0deg); }
	to { transform: rotate(360deg); }
}

.monaco-ide__progress-title {
	font-size: 16px;
	font-weight: 500;
	color: #e0e0e0;
}

.monaco-ide__progress-bar {
	height: 8px;
	background: rgba(255, 255, 255, 0.1);
	border-radius: 4px;
	overflow: hidden;
	margin-bottom: 12px;
}

.monaco-ide__progress-fill {
	height: 100%;
	background: linear-gradient(90deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
	border-radius: 4px;
	transition: width 0.3s ease;
	position: relative;
}

.monaco-ide__progress-fill::after {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
	animation: monaco-shimmer 1.5s infinite;
}

@keyframes monaco-shimmer {
	0% { transform: translateX(-100%); }
	100% { transform: translateX(100%); }
}

.monaco-ide__progress-text {
	font-size: 13px;
	color: #9ca3af;
	text-align: center;
}

/* 深色主题下的进度条 */
.monaco-ide.vs-dark .monaco-ide__progress-container,
.theme-dark .monaco-ide__progress-container {
	background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 100%);
}

/* 浅色主题下的进度条 */
.monaco-ide .monaco-ide__progress-container {
	background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.monaco-ide .monaco-ide__progress-title {
	color: #1e293b;
}

.monaco-ide .monaco-ide__progress-bar {
	background: rgba(0, 0, 0, 0.1);
}

.monaco-ide .monaco-ide__progress-text {
	color: #64748b;
}

@media (max-width: 600px) {
	.monaco-ide__toolbar {
		flex-wrap: wrap;
		gap: 8px;
	}

	.monaco-ide__btn span {
		display: none;
	}

	.monaco-ide__btn {
		padding: 8px;
	}
}

/* 响应式 */
@media (max-width: 768px) {
	.portal-ai-nav {
		padding: 16px;
	}

	.portal-ai-nav__category-header {
		padding: 16px 18px;
	}

	.portal-ai-nav__tools {
		grid-template-columns: 1fr;
		padding: 16px 18px 18px;
		gap: 12px;
	}

	.portal-ai-nav__tool {
		padding: 14px 16px;
	}
}

@media (max-width: 480px) {
	.portal-ai-nav__category-name {
		font-size: 16px;
	}

	.portal-ai-nav__category-icon {
		font-size: 24px;
	}
}

/* ========== 工具卡片网格布局 ========== */
.portal-extras-tools-grid {
	display: flex;
	flex-direction: column;
	gap: 12px;
	padding: 4px 0;
}

/* 工具卡片样式 - 横向卡片设计 */
.portal-extras-tool-card {
	display: flex;
	flex-direction: row;
	align-items: center;
	padding: 16px 20px;
	border-radius: 12px;
	background: var(--um-bg-panel);
	border: 1px solid var(--um-border);
	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
	cursor: pointer;
	transition: all 0.25s ease;
	text-align: left;
	gap: 16px;
}

.portal-extras-tool-card:hover {
	transform: translateX(4px);
	box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
	border-color: var(--um-primary, #3b82f6);
}

.portal-extras-tool-icon {
	font-size: 32px;
	line-height: 1;
	flex-shrink: 0;
	width: 48px;
	height: 48px;
	display: flex;
	align-items: center;
	justify-content: center;
	background: linear-gradient(135deg, var(--um-primary-light, #e0f2fe) 0%, var(--um-bg-panel) 100%);
	border-radius: 12px;
}

.portal-extras-tool-card .student-section-title {
	margin: 0 0 4px 0;
	font-size: 16px;
	font-weight: 600;
	color: var(--um-text);
}

.portal-extras-tool-card p {
	margin: 0;
	font-size: 13px;
	color: var(--um-text-secondary);
	line-height: 1.5;
	flex-grow: 1;
}

.portal-extras-tool-card__content {
	flex: 1;
	min-width: 0;
}

.portal-extras-tool-btn {
	padding: 8px 20px;
	font-size: 14px;
	border-radius: 8px;
	flex-shrink: 0;
}

/* 返回按钮 */
.portal-extras-back-btn {
	margin-bottom: 8px;
}

/* ========== 番茄钟样式 ========== */
.portal-pomodoro {
	display: flex;
	flex-direction: column;
	align-items: center;
	padding: 16px;
	gap: 12px;
}

.portal-pomodoro__timer {
	font-size: 48px;
	font-weight: 700;
	font-variant-numeric: tabular-nums;
	letter-spacing: 2px;
	color: var(--um-text);
	transition: color 0.3s;
}

.portal-pomodoro__timer--work {
	color: var(--um-danger, #e53e3e);
}

.portal-pomodoro__timer--break {
	color: var(--um-success, #38a169);
}

.portal-pomodoro__status {
	font-size: 14px;
	color: var(--um-text-secondary);
}

.portal-pomodoro__status--active {
	font-weight: 600;
}

.portal-pomodoro__controls {
	display: flex;
	gap: 8px;
	flex-wrap: wrap;
	justify-content: center;
}

.portal-pomodoro__stats {
	display: flex;
	gap: 16px;
	font-size: 13px;
	color: var(--um-text-secondary);
	margin-top: 8px;
}

.portal-pomodoro__stat-item {
	display: flex;
	align-items: center;
	gap: 4px;
}

.portal-pomodoro__tomato {
	font-size: 16px;
}

.portal-pomodoro__progress {
	width: 100%;
	max-width: 200px;
	height: 6px;
	background: var(--um-border);
	border-radius: 3px;
	overflow: hidden;
}

.portal-pomodoro__progress-bar {
	height: 100%;
	background: var(--um-primary, #3b82f6);
	transition: width 1s linear;
	border-radius: 3px;
}

.portal-pomodoro__progress-bar--work {
	background: var(--um-danger, #e53e3e);
}

.portal-pomodoro__progress-bar--break {
	background: var(--um-success, #38a169);
}

/* ========== 超级管理员公告卡片样式 ========== */

/* 超级管理员公告卡片：使用金色/橙色主题区分 */
.portal-announcement-card--superuser {
	border-color: rgba(251, 191, 36, 0.3);
}

.portal-announcement-card--superuser .student-card__header {
	border-bottom-color: rgba(251, 191, 36, 0.2);
}

/* 超级管理员公告图标：金色星星 */
.portal-announcement-card__header-icon--superuser {
	background: linear-gradient(135deg, #f59e0b, #d97706);
}

/* 超级管理员公告指示条：金色 */
.portal-announcement-item__indicator--superuser {
	background: linear-gradient(180deg, #f59e0b, #d97706);
}

/* ========== 站内消息卡片样式 ========== */

.portal-message-card .student-card__header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--um-border);
}

.portal-message-card__header-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.portal-message-card__header-icon svg {
    width: 20px;
    height: 20px;
    color: white;
}

.portal-message-card__header-text {
    flex: 1;
    min-width: 0;
}

.portal-message-card__count {
    flex-shrink: 0;
}

.portal-message-preview {
    min-height: 60px;
}

.portal-message-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--um-text-secondary);
}

.portal-message-empty svg {
    width: 32px;
    height: 32px;
    margin-bottom: 8px;
    opacity: 0.5;
}

.portal-message-empty span {
    font-size: 13px;
}

.portal-message-actions {
    margin-top: 12px;
    text-align: center;
}

/* 消息列表项 */
.portal-message-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 12px;
    border-bottom: 1px solid var(--um-border);
    cursor: pointer;
    transition: background 0.2s;
}

.portal-message-item:last-child {
    border-bottom: none;
}

.portal-message-item:hover {
    background: var(--um-bg-hover);
}

.portal-message-item--unread {
    background: rgba(59, 130, 246, 0.08);
}

.portal-message-item--unread:hover {
    background: rgba(59, 130, 246, 0.12);
}

.portal-message-item__indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--um-accent);
    flex-shrink: 0;
    margin-top: 5px;
}

.portal-message-item--unread .portal-message-item__indicator {
    background: #3b82f6;
}

.portal-message-item__main {
    flex: 1;
    min-width: 0;
}

.portal-message-item__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.portal-message-item__sender {
    font-weight: 600;
    font-size: 13px;
    color: var(--um-text-primary);
}

.portal-message-item__time {
    font-size: 11px;
    color: var(--um-text-secondary);
}

.portal-message-item__preview {
    font-size: 12px;
    color: var(--um-text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 消息模态框 */
.portal-modal__dialog--large {
    max-width: 640px;
    width: 95%;
}

/* 模态框显示/隐藏控制 */
.portal-modal {
    display: none;
}

.portal-modal.is-active {
    display: block;
}

/* 消息模态框特殊样式 */
.portal-message-modal .portal-modal__dialog {
    background: var(--um-bg-panel);
}

.portal-message-modal .portal-modal__header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--um-border);
}

.portal-message-modal .portal-modal__title {
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.portal-message-modal .portal-modal__title::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 16px;
    background: linear-gradient(180deg, var(--um-accent), var(--um-accent-hover));
    border-radius: 2px;
}

.portal-message-modal .portal-modal__body {
    padding: 0;
}

/* 标签页导航 */
.portal-message-tabs {
    display: flex;
    gap: 0;
    padding: 0 20px;
    background: var(--um-bg-panel);
    border-bottom: 1px solid var(--um-border);
}

.portal-message-tab {
    padding: 12px 20px;
    border: none;
    background: transparent;
    color: var(--um-text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    position: relative;
    transition: color 0.2s;
}

.portal-message-tab:hover {
    color: var(--um-text-primary);
}

.portal-message-tab::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--um-accent);
    border-radius: 1px;
    transition: width 0.2s;
}

.portal-message-tab.is-active {
    color: var(--um-accent);
}

.portal-message-tab.is-active::after {
    width: 100%;
}

/* 消息列表容器 */
.portal-message-list {
    max-height: 420px;
    overflow-y: auto;
    padding: 8px 0;
}

.portal-message-loading {
    text-align: center;
    padding: 60px 20px;
    color: var(--um-text-secondary);
    font-size: 14px;
}

/* 空消息状态 */
.portal-message-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--um-text-secondary);
}

.portal-message-empty svg {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.portal-message-empty span {
    font-size: 14px;
}

/* 消息列表项 - 重新设计 */
.portal-message-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 20px;
    cursor: pointer;
    transition: background 0.15s;
    border-left: 3px solid transparent;
}

.portal-message-item:hover {
    background: var(--um-bg-hover);
}

.portal-message-item--unread {
    background: rgba(59, 130, 246, 0.06);
    border-left-color: var(--um-accent);
}

.portal-message-item--unread:hover {
    background: rgba(59, 130, 246, 0.1);
}

/* 消息项头像/图标 */
.portal-message-item__avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--um-text-secondary);
}

.portal-message-item--unread .portal-message-item__avatar {
    background: linear-gradient(135deg, var(--um-accent), var(--um-accent-hover));
    color: white;
}

/* 消息项内容 */
.portal-message-item__main {
    flex: 1;
    min-width: 0;
}

.portal-message-item__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.portal-message-item__sender {
    font-weight: 600;
    font-size: 14px;
    color: var(--um-text-primary);
}

.portal-message-item__time {
    font-size: 12px;
    color: var(--um-text-secondary);
    flex-shrink: 0;
}

.portal-message-item__preview {
    font-size: 13px;
    color: var(--um-text-secondary);
    line-height: 1.5;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* 未读指示点 */
.portal-message-item__indicator {
    display: none;
}

.portal-message-item--unread .portal-message-item__indicator {
    display: block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #3b82f6;
    flex-shrink: 0;
    margin-top: 6px;
}

/* 分页 */
.portal-message-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 16px 20px;
    border-top: 1px solid var(--um-border);
    background: var(--um-bg-panel);
}

/* 消息详情模态框 */
.portal-message-detail-modal .portal-modal__dialog {
    background: var(--um-bg-panel);
}

.portal-message-detail-modal .portal-modal__header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--um-border);
}

.portal-message-detail-modal .portal-modal__title {
    font-size: 16px;
    font-weight: 600;
}

.portal-message-detail-modal .portal-modal__body {
    padding: 20px;
}

/* 消息详情元信息 */
.portal-message-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    padding: 16px;
    background: var(--um-bg-hover);
    border-radius: 10px;
    margin-bottom: 16px;
}

.portal-message-detail-meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
}

.portal-message-detail-label {
    color: var(--um-text-secondary);
}

.portal-message-detail-meta-item span:last-child {
    color: var(--um-text-primary);
    font-weight: 500;
}

/* 消息详情内容 */
.portal-message-detail-content {
    font-size: 15px;
    line-height: 1.8;
    color: var(--um-text-primary);
    white-space: pre-wrap;
    word-break: break-word;
    padding: 16px;
    background: var(--um-bg-primary);
    border-radius: 10px;
    border: 1px solid var(--um-border);
    min-height: 100px;
}

/* 模态框底部 */
.portal-modal__footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 16px 20px;
    border-top: 1px solid var(--um-border);
    background: var(--um-bg-panel);
}

/* 表单样式 */
.portal-form-group {
    margin-bottom: 16px;
}

.portal-form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--um-text-primary);
}

.portal-readonly-value {
    padding: 8px 12px;
    background: var(--um-bg-hover);
    border-radius: 6px;
    font-size: 13px;
    color: var(--um-text-primary);
}

.portal-textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--um-border);
    border-radius: 6px;
    font-size: 13px;
    line-height: 1.5;
    background: var(--um-bg-primary);
    color: var(--um-text-primary);
    resize: vertical;
    box-sizing: border-box;
}

.portal-textarea:focus {
    outline: none;
    border-color: var(--um-accent);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.portal-char-count {
    text-align: right;
    font-size: 11px;
    color: var(--um-text-secondary);
    margin-top: 4px;
}

.portal-char-count--warning {
    color: #f59e0b;
}

.portal-char-count--error {
    color: #ef4444;
}

/* 发送消息模态框 */
.portal-send-message-modal .portal-modal__dialog {
    background: var(--um-bg-panel);
}

.portal-send-message-modal .portal-modal__header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--um-border);
}

.portal-send-message-modal .portal-modal__title {
    font-size: 16px;
    font-weight: 600;
    color: var(--um-text-primary);
}

.portal-send-message-modal .portal-modal__body {
    padding: 20px;
}

/* ========== 邮箱图标按钮样式 ========== */

.portal-message-icon-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 1px solid var(--um-border);
    border-radius: 8px;
    background: var(--um-bg-panel);
    color: var(--um-text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    margin-left: 8px;
}

.portal-message-icon-btn:hover {
    background: var(--um-bg-hover);
    border-color: var(--um-accent);
}

.portal-message-icon-btn svg {
    width: 20px;
    height: 20px;
}

.portal-message-badge {
    position: absolute;
    top: -6px;
    right: -6px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    background: #ef4444;
    color: white;
    font-size: 11px;
    font-weight: 600;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.portal-message-badge:empty {
    display: none;
}

/* 班级剩余天数徽章 */
.cm-node__remaining-badge {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 18px;
    padding: 0 5px;
    margin-left: 6px;
    background: #ef4444;
    color: white;
    font-size: 11px;
    font-weight: 600;
    border-radius: 9px;
    border: none;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(239, 68, 68, 0.4);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.cm-node__remaining-badge:hover {
    transform: scale(1.1);
    box-shadow: 0 2px 6px rgba(239, 68, 68, 0.5);
}

.cm-node__remaining-badge.is-warning {
    background: #f59e0b;
    box-shadow: 0 1px 3px rgba(245, 158, 11, 0.4);
}

.cm-node__remaining-badge.is-warning:hover {
    box-shadow: 0 2px 6px rgba(245, 158, 11, 0.5);
}

.cm-node__remaining-badge.is-expired {
    background: #6b7280;
    box-shadow: 0 1px 3px rgba(107, 114, 128, 0.4);
}

.cm-node__remaining-badge.is-expired:hover {
    box-shadow: 0 2px 6px rgba(107, 114, 128, 0.5);
}

.cm-node__remaining-badge.is-permanent {
    background: #10b981;
    box-shadow: 0 1px 3px rgba(16, 185, 129, 0.4);
}

.cm-node__remaining-badge.is-permanent:hover {
    box-shadow: 0 2px 6px rgba(16, 185, 129, 0.5);
}

/* 班级剩余天数弹窗 */
.portal-remaining-days-modal .portal-modal__dialog {
    max-width: 400px;
}

.portal-remaining-days-modal__content {
    padding: 8px 0;
}

.portal-remaining-days-modal__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--um-border, #e5e7eb);
}

.portal-remaining-days-modal__row:last-of-type {
    margin-bottom: 16px;
}

.portal-remaining-days-modal__label {
    color: var(--um-text-secondary, #6b7280);
    font-size: 14px;
}

.portal-remaining-days-modal__name {
    font-weight: 600;
    font-size: 15px;
    color: var(--um-text-primary, #1f2937);
}

.portal-remaining-days-modal__days {
    font-weight: 700;
    font-size: 18px;
    color: #ef4444;
}

.portal-remaining-days-modal__days.is-permanent {
    color: #10b981;
}

.portal-remaining-days-modal__days.is-warning {
    color: #f59e0b;
}

.portal-remaining-days-modal__days.is-expired {
    color: #6b7280;
}

.portal-remaining-days-modal__status {
    margin-top: 16px;
    padding: 12px;
    background: var(--um-bg-secondary, #f3f4f6);
    border-radius: 8px;
    font-size: 14px;
    color: var(--um-text-primary, #1f2937);
    line-height: 1.5;
}

.portal-remaining-days-modal__contact-btn {
    margin-top: 16px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}