/* ===== 我的动态 ===== */
.activity-tabs {
    display: flex;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}
.atab {
    flex: 1;
    text-align: center;
    padding: 13px 0;
    font-size: 0.92em;
    color: var(--text-secondary);
    cursor: pointer;
    position: relative;
    transition: color 0.25s var(--ease);
    font-weight: 500;
}
.atab.active { color: var(--accent); font-weight: 700; }
.atab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 28%;
    width: 44%;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
}

.activity-card {
    background: var(--bg-card);
    margin: 8px 24px;
    border-radius: var(--radius);
    padding: 16px 24px;
    cursor: pointer;
    position: relative;
    box-shadow: var(--card-shadow);
    transition: all 0.25s var(--ease);
}
.activity-card:active { background: var(--bg-hover); transform: scale(0.985); }
.activity-card .ac-title {
    font-size: 1em;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    padding-right: 70px;
}
.activity-card .ac-content {
    font-size: 0.86em;
    color: var(--text-secondary);
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.activity-card .ac-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 10px;
    font-size: 0.8em;
    color: var(--text-dim);
}
.activity-card .ac-tag {
    display: inline-block;
    padding: 3px 9px;
    border-radius: 6px;
    font-size: 0.85em;
    font-weight: 700;
    background: var(--accent-bg);
    color: var(--accent);
}
.activity-card .ac-actions {
    position: absolute;
    right: 14px;
    top: 14px;
    display: flex;
    gap: 8px;
}
.ac-actions .ac-btn {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: none;
    background: var(--bg-elevated);
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s var(--ease);
    box-shadow: var(--shadow-sm);
}
.ac-actions .ac-btn:active { background: var(--bg-hover); transform: scale(0.9); }
.ac-actions .ac-btn.danger { color: var(--red); }