/* 话题页：列表与发布弹窗 */
.discuss-page-shell {
    padding: 18px 0 56px;
}

.discuss-feed-panel {
    padding: 20px;
    border-radius: 20px;
}

.discuss-feed-toolbar {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    margin-bottom: 14px;
}

.discuss-create-trigger {
    min-width: 132px;
}

.discuss-keyword-hint {
    margin-top: 0;
    margin-bottom: 14px;
}

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

.discuss-list-item {
    padding: 20px 0;
    border: none;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    background: transparent;
    transition: border-color var(--transition), background-color var(--transition);
}

.discuss-list-grid > .discuss-list-item:last-child {
    border-bottom: none;
}

.discuss-list-item:hover {
    border-color: rgba(22, 119, 255, 0.18);
    background: rgba(22, 119, 255, 0.02);
}

.discuss-list-head,
.discuss-list-user,
.discuss-list-metrics {
    display: flex;
    align-items: center;
    gap: 12px;
}

.discuss-list-head {
    justify-content: space-between;
}

.discuss-list-user img {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
}

.discuss-list-user strong {
    display: block;
    font-size: 16px;
}

.discuss-list-user span,
.discuss-list-metrics span,
.discuss-list-copy em {
    color: var(--muted);
    font-size: 13px;
}

.discuss-list-body {
    display: grid;
    gap: 16px;
    margin-top: 18px;
}

.discuss-list-body.has-cover {
    grid-template-columns: 220px minmax(0, 1fr);
    align-items: start;
}

.discuss-list-cover {
    overflow: hidden;
    border-radius: 16px;
}

.discuss-list-cover img {
    width: 100%;
    height: 160px;
    object-fit: cover;
}

.discuss-list-copy {
    display: grid;
    gap: 8px;
}

.discuss-list-copy strong {
    line-height: 1.45;
}

.discuss-list-copy p,
.discuss-list-copy em {
    margin: 0;
}

.discuss-list-copy p {
    color: #4e5969;
}

.discuss-load-state {
    text-align: center;
}

body.topic-modal-open {
    overflow: hidden;
}

.discuss-modal {
    position: fixed;
    inset: 0;
    z-index: 70;
}

.discuss-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.54);
    backdrop-filter: blur(8px);
}

.discuss-modal-panel {
    position: relative;
    z-index: 1;
    width: min(760px, calc(100% - 24px));
    max-height: calc(100vh - 48px);
    margin: 24px auto;
    overflow: auto;
    padding: 24px;
    border-radius: 28px;
    background: #fff;
    box-shadow: 0 30px 60px rgba(15, 23, 42, 0.2);
}

.discuss-modal-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 20px;
}

.discuss-modal-head h2 {
    margin: 8px 0 0;
    font-size: 28px;
}

.discuss-modal-close {
    min-height: 40px;
    padding: 0 16px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--surface-soft);
    color: var(--muted);
    cursor: pointer;
}

.discuss-composer-form {
    gap: 14px;
}

.discuss-composer-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.discuss-composer-tools {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.discuss-composer-submit {
    min-width: 128px;
}

@media (max-width: 720px) {
    .discuss-page-shell {
        padding-bottom: 36px;
    }

    .discuss-list-head,
    .discuss-composer-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .discuss-list-body.has-cover {
        grid-template-columns: 1fr;
    }

    .discuss-list-cover img {
        height: 200px;
    }

    .discuss-modal-panel {
        margin: 12px auto;
        padding: 18px;
        max-height: calc(100vh - 24px);
    }

    .discuss-modal-head {
        flex-direction: column;
    }
}