/* ============================================================
 * 论坛前台样式（core/forum 模块）
 * 作用域：#forum（.bbs-page）
 * ============================================================ */

#forum.bbs-page {
    padding: 20px 0 40px;
    color: var(--knn-text-color);
}
#forum .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* ---------- 通用工具类（模块内自带） ---------- */
#forum .muted-2-color { color: var(--knn-text-color-grey); }
#forum .muted-3-color { color: var(--knn-text-color-placeholder); font-size: 13px; }
#forum .focus-color { color: var(--knn-color-primary); }
#forum .c-red { color: var(--knn-color-danger); }
#forum .c-green { color: var(--knn-color-success); }
#forum .mr3 { margin-right: 3px; }
#forum .mr6 { margin-right: 6px; }
#forum .ml6 { margin-left: 6px; }
#forum .ml10 { margin-left: 10px; }

#forum .badg {
    display: inline-block;
    padding: 2px 8px;
    font-size: 12px;
    line-height: 1.4;
    border-radius: var(--knn-border-radius);
    background: var(--knn-bg-color-grey);
    color: var(--knn-text-color-grey);
    vertical-align: middle;
}
#forum .badg.badg-sm { padding: 1px 6px; font-size: 11px; }
#forum .badg.jb-red { background: linear-gradient(135deg, #ff5473, #dd524d); color: #fff; }
#forum .badg.jb-yellow { background: linear-gradient(135deg, #ffb114, #ff6f06); color: #fff; }
#forum .badg.jb-blue { background: linear-gradient(135deg, #34a5ff, #007aff); color: #fff; }
#forum .badg.c-yellow { background: rgba(255, 111, 6, 0.1); color: #ff6f06; }

#forum .but {
    display: inline-flex;
    align-items: center;
    padding: 8px 18px;
    font-size: 14px;
    line-height: 1.4;
    border: 0;
    border-radius: var(--knn-border-radius);
    cursor: pointer;
    text-decoration: none;
    transition: opacity 0.2s;
}
#forum .but:hover { opacity: 0.85; }
#forum .bbs-but-main { background: var(--knn-color-primary); color: #fff; }
#forum .bbs-but-line {
    background: transparent;
    color: var(--knn-color-primary);
    box-shadow: inset 0 0 0 1px var(--knn-color-primary);
}

/* ---------- 面包屑 ---------- */
#forum .bbs-breadcrumbs {
    margin-bottom: 15px;
    font-size: 13px;
}
#forum .bbs-breadcrumbs a { color: var(--knn-text-color-placeholder); }
#forum .bbs-breadcrumbs a:hover { color: var(--knn-color-primary); }
#forum .bbs-breadcrumbs .fa { margin: 0 6px; }

/* ---------- 空状态 ---------- */
#forum .bbs-null {
    padding: 60px 0;
    text-align: center;
    background: var(--knn-bg-color-card);
    border-radius: var(--knn-border-radius);
}

/* ---------- 三栏布局（首页）/ 两栏布局 ---------- */
#forum .bbs-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 15px;
    align-items: start;
}
#forum .bbs-layout-3 { grid-template-columns: 200px minmax(0, 1fr) 260px; }
#forum .bbs-main { min-width: 0; }
#forum .bbs-side { position: sticky; top: 80px; }
#forum .bbs-nav-col { position: sticky; top: 80px; }
#forum .bbs-but-block {
    justify-content: center;
    width: 100%;
    margin-bottom: 15px;
    padding: 10px 0;
    box-sizing: border-box;
    font-weight: bold;
}

/* ---------- 左侧版块竖排导航 ---------- */
#forum .bbs-plate-nav {
    padding: 10px 8px;
    background: var(--knn-bg-color-card);
    border-radius: var(--knn-border-radius);
}
#forum .bbs-nav-head {
    margin: 4px 10px 8px;
    font-size: 16px;
    font-weight: bold;
}
#forum .bbs-nav-item {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 0 10px;
    height: 40px;
    border-radius: var(--knn-border-radius);
    color: var(--knn-text-color);
    font-size: 14px;
    text-decoration: none;
    transition: background 0.2s;
}
#forum .bbs-nav-item:hover { background: var(--knn-bg-color-grey); }
#forum .bbs-nav-item.active {
    background: rgba(0, 122, 255, 0.08);
    color: var(--knn-color-primary);
    font-weight: bold;
}
#forum .bbs-nav-item > .fa {
    width: 20px;
    text-align: center;
    font-size: 14px;
    color: var(--knn-text-color-grey);
}
#forum .bbs-nav-item.active > .fa { color: var(--knn-color-primary); }
#forum .bbs-nav-item .plate-icon {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    font-size: 11px;
}
#forum .bbs-nav-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}
#forum .bbs-nav-child { padding-left: 28px; }
#forum .bbs-nav-group {
    margin: 8px 10px 2px;
    font-size: 12px;
}
#forum .bbs-nav-add { color: var(--knn-color-primary); }
#forum .bbs-nav-add > .fa { color: var(--knn-color-primary); }

/* ---------- 面板（帖子流容器） ---------- */
#forum .bbs-panel {
    margin-bottom: 20px;
    background: var(--knn-bg-color-card);
    border-radius: var(--knn-border-radius);
    overflow: hidden;
}
#forum .bbs-panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 18px;
    border-bottom: 1px solid var(--knn-border-color);
}
#forum .bbs-panel .bbs-posts-lists { border-radius: 0; }
#forum .bbs-panel .bbs-pagination { margin: 0; padding: 15px; }
#forum .bbs-panel .bbs-null { padding: 40px 0; border-radius: 0; }

/* ---------- 右侧栏卡片 ---------- */
#forum .bbs-side-card {
    padding: 16px 18px;
    margin-bottom: 20px;
    background: var(--knn-bg-color-card);
    border-radius: var(--knn-border-radius);
}
#forum .bbs-side-card-title {
    position: relative;
    padding-left: 11px;
    margin-bottom: 12px;
    font-size: 15px;
    font-weight: bold;
}
#forum .bbs-side-card-title::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 14px;
    border-radius: 3px;
    background: var(--knn-color-primary);
}
#forum .bbs-side-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    text-align: center;
}
#forum .bbs-side-stats b { display: block; font-size: 18px; }
#forum .bbs-side-stats span { font-size: 12px; color: var(--knn-text-color-placeholder); }
#forum .bbs-hot-lists { display: flex; flex-direction: column; gap: 10px; }
#forum .bbs-hot-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--knn-text-color);
    text-decoration: none;
    font-size: 13px;
}
#forum .bbs-hot-item:hover .bbs-hot-title { color: var(--knn-color-primary); }
#forum .bbs-hot-rank {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 4px;
    background: var(--knn-bg-color-grey);
    color: var(--knn-text-color-placeholder);
    font-size: 12px;
}
#forum .bbs-hot-rank.rank-1 { background: #ff5473; color: #fff; }
#forum .bbs-hot-rank.rank-2 { background: #ff9500; color: #fff; }
#forum .bbs-hot-rank.rank-3 { background: #ffcc00; color: #fff; }
#forum .bbs-hot-title {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}
#forum .bbs-topic-cloud { display: flex; flex-wrap: wrap; gap: 8px; }

/* ---------- 版块分组 / 网格 ---------- */
#forum .bbs-plate-group { margin-bottom: 15px; }
#forum .bbs-group-title {
    margin: 0 0 10px;
    font-size: 16px;
    font-weight: bold;
}
#forum .bbs-plate-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}
#forum .bbs-plate-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    background: var(--knn-bg-color-card);
    border-radius: var(--knn-border-radius);
    color: var(--knn-text-color);
    text-decoration: none;
    transition: box-shadow 0.2s;
}
#forum .bbs-plate-card:hover { box-shadow: 0 2px 12px var(--knn-shadow-color); }
#forum .plate-icon {
    flex-shrink: 0;
    width: 46px;
    height: 46px;
    border-radius: var(--knn-border-radius);
    object-fit: cover;
}
#forum span.plate-icon-default {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 122, 255, 0.1);
    color: var(--knn-color-primary);
    font-size: 20px;
}
#forum .bbs-plate-info { min-width: 0; }
#forum .bbs-plate-name { font-size: 15px; font-weight: bold; }
#forum .bbs-plate-desc {
    margin-top: 2px;
    font-size: 12px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}
#forum .bbs-plate-stats { margin-top: 2px; font-size: 12px; }

/* ---------- 列表区块头 / 排序条（tab 风格） ---------- */
#forum .bbs-section-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 20px 0 10px;
}
#forum .bbs-section-title { font-size: 16px; font-weight: bold; }
#forum .bbs-orderby-bar { display: flex; gap: 22px; font-size: 15px; }
#forum .bbs-orderby-bar a {
    color: var(--knn-text-color-grey);
    text-decoration: none;
}
#forum .bbs-orderby-bar a:hover { color: var(--knn-color-primary); }
#forum .bbs-orderby-bar .focus-color { font-weight: bold; }
#forum .bbs-panel-head .bbs-orderby-bar { margin: -13px 0; }
#forum .bbs-panel-head .bbs-orderby-bar a,
#forum .bbs-panel-head .bbs-orderby-bar .focus-color {
    position: relative;
    padding: 13px 0;
}
#forum .bbs-panel-head .bbs-orderby-bar .focus-color::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    border-radius: 2px;
    background: var(--knn-color-primary);
}

/* ---------- 帖子卡片 ---------- */
#forum .bbs-posts-lists {
    background: var(--knn-bg-color-card);
    border-radius: var(--knn-border-radius);
}
#forum .bbs-posts-card {
    display: flex;
    gap: 14px;
    padding: 18px;
    border-bottom: 1px solid var(--knn-border-color);
}
#forum .bbs-posts-card:last-child { border-bottom: 0; }
#forum .bbs-card-avatar .avatar { border-radius: 50%; }
#forum .bbs-card-main { flex: 1; min-width: 0; }
#forum .bbs-card-title {
    display: block;
    font-size: 16px;
    font-weight: bold;
    color: var(--knn-text-color);
    text-decoration: none;
}
#forum .bbs-card-title:hover { color: var(--knn-color-primary); }
#forum .bbs-card-excerpt {
    margin-top: 4px;
    font-size: 13px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
#forum .bbs-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
    flex-wrap: wrap;
}
#forum .bbs-card-plate { color: var(--knn-color-primary); font-size: 13px; }
#forum .bbs-card-stats { margin-left: auto; }
#forum .bbs-card-stats .fa { margin-right: 3px; }
#forum .bbs-card-stats .ml6 { margin-left: 6px; }

/* ---------- 分页 ---------- */
#forum .bbs-pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 20px;
}
#forum .bbs-pagination .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    border-radius: var(--knn-border-radius);
    background: var(--knn-bg-color-card);
    color: var(--knn-text-color);
    font-size: 13px;
    text-decoration: none;
}
#forum .bbs-pagination .page-numbers.current {
    background: var(--knn-color-primary);
    color: #fff;
}

/* ---------- 版块页头部 ---------- */
#forum .bbs-plate-header {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 20px;
    margin-bottom: 15px;
    background: var(--knn-bg-color-card);
    border-radius: var(--knn-border-radius);
}
#forum .plate-icon.plate-icon-lg { width: 64px; height: 64px; font-size: 26px; }
#forum .bbs-plate-header-info { flex: 1; min-width: 0; }
#forum .bbs-plate-header-name { margin: 0 0 6px; font-size: 20px; }
#forum .bbs-plate-header-meta {
    display: flex;
    gap: 12px;
    margin-top: 6px;
}
#forum .bbs-plate-moderators {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 8px;
    font-size: 13px;
}
#forum .bbs-moderator-item .avatar { border-radius: 50%; vertical-align: middle; }
#forum .bbs-plate-header-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* ---------- 话题/标签归档头部 ---------- */
#forum .bbs-term-header {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    margin-bottom: 15px;
    background: var(--knn-bg-color-card);
    border-radius: var(--knn-border-radius);
}
#forum .bbs-term-header-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 54px;
    height: 54px;
    border-radius: var(--knn-border-radius);
    background: rgba(0, 122, 255, 0.1);
    color: var(--knn-color-primary);
    font-size: 22px;
}
#forum .bbs-term-header-name { margin: 0 0 4px; font-size: 20px; }

/* ---------- 帖子详情页 ---------- */
#forum .bbs-single {
    padding: 25px;
    margin-bottom: 15px;
    background: var(--knn-bg-color-card);
    border-radius: var(--knn-border-radius);
}
#forum .bbs-pending-notice {
    padding: 10px 15px;
    margin-bottom: 15px;
    border-radius: var(--knn-border-radius);
    background: rgba(240, 173, 78, 0.12);
    color: #ff6f06;
    font-size: 13px;
}
#forum .bbs-single-title { margin: 0 0 15px; font-size: 22px; }
#forum .bbs-single-authorbar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--knn-border-color);
}
#forum .bbs-author-avatar .avatar { border-radius: 50%; }
#forum .bbs-author-name { font-size: 14px; font-weight: bold; }
#forum .bbs-single-content {
    padding: 20px 0;
    font-size: 15px;
    line-height: 1.8;
    word-break: break-word;
}
#forum .bbs-single-content img { max-width: 100%; height: auto; }
#forum .bbs-posts-terms {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}
#forum .bbs-term-item {
    padding: 3px 10px;
    border-radius: 20px;
    background: var(--knn-bg-color-grey);
    color: var(--knn-text-color-grey);
    font-size: 12px;
    text-decoration: none;
}
#forum .bbs-term-item:hover { color: var(--knn-color-primary); }
#forum .bbs-posts-action-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 15px;
    border-top: 1px solid var(--knn-border-color);
    flex-wrap: wrap;
    gap: 8px;
}
#forum .bbs-action-manage { display: flex; gap: 12px; flex-wrap: wrap; }
#forum .bbs-action-but {
    color: var(--knn-text-color-grey);
    font-size: 13px;
    text-decoration: none;
    cursor: pointer;
}
#forum .bbs-action-but:hover { color: var(--knn-color-primary); }
#forum .bbs-action-but.c-red:hover { color: var(--knn-color-danger); }
#forum .bbs-single-comments {
    padding: 5px 25px 25px;
    background: var(--knn-bg-color-card);
    border-radius: var(--knn-border-radius);
}

/* ---------- 发帖/编辑页 ---------- */
#forum .bbs-edit-page {
    padding: 25px;
    background: var(--knn-bg-color-card);
    border-radius: var(--knn-border-radius);
}
#forum .bbs-edit-title-bar h1 { margin: 0 0 20px; font-size: 20px; }
#forum .bbs-form-item { margin-bottom: 18px; }
#forum .bbs-form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: bold;
}
#forum .bbs-form-input,
#forum .bbs-form-select,
#forum .bbs-form-textarea {
    width: 100%;
    padding: 9px 12px;
    font-size: 14px;
    color: var(--knn-text-color);
    background: var(--knn-bg-color);
    border: 1px solid var(--knn-border-color);
    border-radius: var(--knn-border-radius);
    box-sizing: border-box;
    outline: none;
}
#forum .bbs-form-input:focus,
#forum .bbs-form-select:focus,
#forum .bbs-form-textarea:focus { border-color: var(--knn-color-primary); }
#forum .bbs-form-textarea { resize: vertical; line-height: 1.6; }
#forum .bbs-form-upload { margin-top: 8px; }
#forum .bbs-form-submit { display: flex; align-items: center; }
#forum .bbs-form-msg { font-size: 13px; }

/* ---------- 模态弹窗（创建/编辑版块） ---------- */
#forum .bbs-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
}
#forum .bbs-modal-mask {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
}
#forum .bbs-modal-dialog {
    position: relative;
    width: 420px;
    max-width: calc(100vw - 30px);
    max-height: calc(100vh - 60px);
    margin: 8vh auto 0;
    display: flex;
    flex-direction: column;
    background: var(--knn-bg-color-card);
    border-radius: calc(var(--knn-border-radius) + 4px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    animation: bbsModalIn 0.2s ease;
}
@keyframes bbsModalIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
#forum .bbs-modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    border-bottom: 1px solid var(--knn-border-color);
}
#forum .bbs-modal-title { font-size: 16px; font-weight: bold; }
#forum .bbs-modal-close {
    color: var(--knn-text-color-placeholder);
    font-size: 16px;
    text-decoration: none;
}
#forum .bbs-modal-close:hover { color: var(--knn-text-color); }
#forum .bbs-modal-body {
    padding: 20px;
    overflow-y: auto;
}
#forum .bbs-modal-body .bbs-form-item:last-of-type { margin-bottom: 0; }
#forum .bbs-modal-foot {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 12px 20px;
    border-top: 1px solid var(--knn-border-color);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
    #forum .bbs-layout-3 { grid-template-columns: minmax(0, 1fr) 260px; }
    #forum .bbs-nav-col { display: none; }
}
@media (max-width: 992px) {
    #forum .bbs-layout { grid-template-columns: 1fr; }
    #forum .bbs-layout-3 { grid-template-columns: 1fr; }
    #forum .bbs-side { position: static; }
}
@media (max-width: 768px) {
    #forum .bbs-plate-grid { grid-template-columns: 1fr; }
    #forum .bbs-plate-header { flex-wrap: wrap; }
    #forum .bbs-plate-header-actions { flex-direction: row; width: 100%; }
    #forum .bbs-single { padding: 15px; }
    #forum .bbs-single-comments { padding: 5px 15px 15px; }
    #forum .bbs-edit-page { padding: 15px; }
}