/* 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-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--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;
}

/* ========== 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--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;
}

/* ========== 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;
}