/* --- 公告详情页 CSS --- */
.announcement-detail-page {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--primary-bg);
    z-index: 2000;
    overflow-y: auto;
    color: var(--text-color);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease-in-out;
}

.announcement-detail-page.show {
    opacity: 1;
    pointer-events: auto;
}

.announcement-detail-header {
    padding: 15px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    background-color: var(--primary-bg);
    z-index: 2003; /* Must be higher than clone */
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.announcement-detail-header .back-button {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 24px;
    cursor: pointer;
    padding: 10px;
}

.announcement-detail-header-name {
    margin-left: 20px;
    font-size: 20px;
    font-weight: bold;
    color: var(--text-color);
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: calc(100% - 100px);
}

.announcement-detail-content-wrapper {
    padding: 25px;
    max-width: 800px;
    margin: 0 auto;
    /* Content is initially hidden */
    visibility: hidden;
}

.announcement-detail-content-wrapper.visible {
    visibility: visible;
}


.announcement-detail-image-container {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 25px;
    background-color: var(--secondary-bg);
    visibility: hidden; /* Placeholder is hidden until clone animation finishes */
}

.announcement-detail-image-container.visible {
    visibility: visible;
}

.announcement-detail-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.announcement-detail-text-content {
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.4s ease-out 0.1s, transform 0.4s ease-out 0.1s;
}

.announcement-detail-page.show .announcement-detail-text-content {
    opacity: 1;
    transform: translateY(0);
}


.announcement-detail-title {
    font-size: 28px;
    font-weight: bold;
    margin: 0 0 15px 0;
}

/* --- [新增] 时间戳样式 --- */
.announcement-timestamps {
    font-size: 0.8rem;
    color: var(--light-text-color);
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 5px; /* 时间戳之间的垂直间距 */
    border-bottom: 1px solid var(--border-color); /* 将分割线下移到这里 */
    padding-bottom: 20px; /* 增加分割线与下方作者的间距 */
}

.announcement-authors {
    display: flex;
    flex-direction: column;
    gap: 12px;
    /* 移除了边框和内边距，因为它们被移到了时间戳容器中 */
}

.announcement-authors .user-group {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 32px; /* 确保加载时行高稳定 */
}

.announcement-authors .user-group .label {
    font-size: 0.9em;
    color: var(--text-secondary);
    width: 50px;
    flex-shrink: 0;
}

.announcement-authors .avatar-list {
    display: flex;
    align-items: center;
}

.announcement-authors .avatar {
    width: 32px;
    height: 32px;
    border: 2px solid var(--primary-bg);
    margin-left: -12px;
    background-color: var(--secondary-bg);
    transition: transform 0.2s;
    cursor: pointer;
    position: relative;
    border-radius: 50%;
}

.announcement-authors .avatar:first-child {
    margin-left: 0;
}

.announcement-authors .avatar:hover {
    transform: scale(1.2);
    z-index: 10;
}

.announcement-authors .avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.announcement-authors .avatar-tooltip {
    visibility: hidden;
    width: max-content;
    background-color: #111;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px 10px;
    position: absolute;
    z-index: 100;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 0.8em;
    pointer-events: none;
}

.announcement-authors .avatar:hover .avatar-tooltip {
    visibility: visible;
    opacity: 1;
}

.announcement-detail-body {
    font-size: 16px;
    line-height: 1.8;
    color: var(--light-text-color);
    margin-top: 25px;
}
.announcement-detail-body p {
    margin: 0 0 1em 0;
}

/* --- Animation Clone --- */
.announcement-image-clone {
    position: fixed;
    z-index: 2002;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    overflow: hidden;
    background-size: cover;
    background-position: center;
}

/* --- 作者信息加载动画样式 --- */
.announcement-authors .loader {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.2); /* 浅色背景环 */
    border-top-color: var(--accent-color); /* 使用主题橙色 */
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}