/* ============================================================
 * 主题内容组件 — 前台渲染样式（论坛编辑器 + 古腾堡区块共用）
 * 作用域：全站（类名 knn-block- 前缀限定；论坛页由 template.php、文章页由 core/blocks.php 按需入队）
 * ============================================================ */

/* ---------- 文件下载卡片 ---------- */
.knn-block-download {
    margin: 16px 0;
    border: 1px solid var(--knn-border-color, #E5E6EB);
    border-radius: 8px;
    background: var(--knn-bg-color-card, #fff);
    overflow: hidden;
    transition: box-shadow .2s;
}
.knn-block-download:hover {
    box-shadow: 0 4px 12px rgba(64, 158, 255, .12);
}
.knn-block-download-link {
    display: flex;
    align-items: center;
    padding: 14px 18px;
    text-decoration: none;
    color: inherit;
    gap: 14px;
}
.knn-block-download-icon {
    flex-shrink: 0;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(135deg, #409EFF, #66b1ff);
    color: #fff;
    font-size: 18px;
}
.knn-block-download-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}
.knn-block-download-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--knn-forum-title-color, #272E3B);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.knn-block-download-size {
    font-size: 12px;
    color: var(--knn-text-color-placeholder, #86909C);
}

/* ---------- Tab 栏目 ---------- */
.knn-block-tab {
    margin: 16px 0;
    border: 1px solid var(--knn-border-color, #E5E6EB);
    border-radius: 8px;
    background: var(--knn-bg-color-card, #fff);
    overflow: hidden;
}
.knn-block-tab .tab-nav {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    border-bottom: 1px solid var(--knn-border-color, #E5E6EB);
    background: var(--knn-bg-color, #F7F8FA);
    overflow-x: auto;
}
.knn-block-tab .tab-nav-item {
    padding: 10px 20px;
    font-size: 14px;
    color: var(--knn-text-color, #4E5969);
    cursor: pointer;
    white-space: nowrap;
    border-bottom: 2px solid transparent;
    transition: color .2s, border-color .2s;
    user-select: none;
}
.knn-block-tab .tab-nav-item:hover {
    color: var(--knn-color-primary, #409EFF);
}
.knn-block-tab .tab-nav-item.active {
    color: var(--knn-color-primary, #409EFF);
    border-bottom-color: var(--knn-color-primary, #409EFF);
    font-weight: 500;
}
.knn-block-tab .tab-content {
    padding: 16px 20px;
}
.knn-block-tab .tab-pane {
    display: none;
}
.knn-block-tab .tab-pane.active {
    display: block;
}

/* ---------- 视频播放器 ---------- */
.knn-block-video {
    margin: 16px 0;
    border-radius: 8px;
    overflow: hidden;
    background: #000;
    line-height: 0;
}
.knn-block-video video {
    width: 100%;
    max-height: 500px;
    display: block;
}

/* ---------- 弹窗 ---------- */
.knn-block-modal {
    display: inline-block;
    margin: 8px 0;
}
.knn-block-modal-trigger {
    display: inline-flex;
    align-items: center;
    padding: 8px 20px;
    font-size: 14px;
    color: #fff;
    background: linear-gradient(135deg, #409EFF, #66b1ff);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: opacity .2s;
}
.knn-block-modal-trigger:hover {
    opacity: .85;
}
.knn-block-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, .45);
    animation: knnModalFadeIn .2s ease;
}
@keyframes knnModalFadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}
.knn-block-modal-dialog {
    width: 90%;
    max-width: 520px;
    max-height: 80vh;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, .18);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: knnModalSlideIn .25s ease;
}
@keyframes knnModalSlideIn {
    from { transform: translateY(-20px); opacity: 0; }
    to   { transform: translateY(0); opacity: 1; }
}
.knn-block-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    border-bottom: 1px solid var(--knn-border-color, #E5E6EB);
}
.knn-block-modal-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--knn-forum-title-color, #272E3B);
}
.knn-block-modal-close {
    background: none;
    border: none;
    font-size: 16px;
    color: var(--knn-text-color-placeholder, #86909C);
    cursor: pointer;
    padding: 4px;
    line-height: 1;
}
.knn-block-modal-close:hover {
    color: var(--knn-color-primary, #409EFF);
}
.knn-block-modal-body {
    padding: 20px;
    overflow-y: auto;
    font-size: 14px;
    color: var(--knn-text-color, #4E5969);
    line-height: 1.7;
}

/* ---------- 折叠框 ---------- */
.knn-block-collapse {
    margin: 16px 0;
    border: 1px solid var(--knn-border-color, #E5E6EB);
    border-radius: 8px;
    background: var(--knn-bg-color-card, #fff);
    overflow: hidden;
}
.knn-block-collapse .collapse-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 18px;
    font-size: 14px;
    font-weight: 500;
    color: var(--knn-forum-title-color, #272E3B);
    cursor: pointer;
    user-select: none;
    transition: background .2s;
}
.knn-block-collapse .collapse-header:hover {
    background: var(--knn-bg-color, #F7F8FA);
}
.knn-block-collapse .collapse-arrow {
    font-size: 12px;
    transition: transform .25s;
    color: var(--knn-text-color-placeholder, #86909C);
}
.knn-block-collapse.open .collapse-arrow {
    transform: rotate(90deg);
}
.knn-block-collapse .collapse-body {
    display: none;
    padding: 0 18px 14px;
    font-size: 14px;
    color: var(--knn-text-color, #4E5969);
    line-height: 1.7;
}
.knn-block-collapse.open .collapse-body {
    display: block;
}

/* ---------- 提醒框 ---------- */
.knn-block-alert {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin: 16px 0;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    line-height: 1.6;
    border: 1px solid transparent;
}
.knn-block-alert-icon {
    flex-shrink: 0;
    font-size: 16px;
    margin-top: 2px;
}
.knn-block-alert-content {
    min-width: 0;
}
.knn-block-alert-content p {
    margin: 0;
}
.knn-block-alert.info {
    background: rgba(64, 158, 255, .08);
    border-color: rgba(64, 158, 255, .25);
    color: #2b7de9;
}
.knn-block-alert.success {
    background: rgba(103, 194, 58, .08);
    border-color: rgba(103, 194, 58, .25);
    color: #389e0d;
}
.knn-block-alert.warning {
    background: rgba(230, 162, 52, .08);
    border-color: rgba(230, 162, 52, .25);
    color: #b88217;
}
.knn-block-alert.danger {
    background: rgba(245, 108, 108, .08);
    border-color: rgba(245, 108, 108, .25);
    color: #c0392b;
}

/* ---------- 按钮组 ---------- */
.knn-block-btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 16px 0;
}
.knn-block-btn-group .btn {
    display: inline-flex;
    align-items: center;
    padding: 8px 20px;
    font-size: 14px;
    border-radius: 6px;
    text-decoration: none;
    transition: opacity .2s, box-shadow .2s;
    border: 1px solid transparent;
    line-height: 1.4;
}
.knn-block-btn-group .btn:hover {
    opacity: .85;
    text-decoration: none;
}
.knn-block-btn-group .btn-default {
    background: var(--knn-bg-color, #F7F8FA);
    color: var(--knn-text-color, #4E5969);
    border-color: var(--knn-border-color, #E5E6EB);
}
.knn-block-btn-group .btn-primary {
    background: linear-gradient(135deg, #409EFF, #66b1ff);
    color: #fff;
}
.knn-block-btn-group .btn-success {
    background: linear-gradient(135deg, #67C23A, #85ce61);
    color: #fff;
}
.knn-block-btn-group .btn-warning {
    background: linear-gradient(135deg, #E6A23C, #ebb563);
    color: #fff;
}
.knn-block-btn-group .btn-danger {
    background: linear-gradient(135deg, #F56C6C, #f89898);
    color: #fff;
}

/* ---------- 文章列表 ---------- */
.knn-block-posts-list {
    margin: 16px 0;
    border: 1px solid var(--knn-border-color, #E5E6EB);
    border-radius: 8px;
    background: var(--knn-bg-color-card, #fff);
    overflow: hidden;
}
.knn-block-posts-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 18px;
    border-bottom: 1px dashed var(--knn-border-color, #E5E6EB);
    gap: 12px;
}
.knn-block-posts-item:last-child {
    border-bottom: none;
}
.knn-block-posts-title {
    flex: 1;
    font-size: 14px;
    color: var(--knn-forum-title-color, #272E3B);
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color .2s;
}
.knn-block-posts-title:hover {
    color: var(--knn-color-primary, #409EFF);
}
.knn-block-posts-date {
    flex-shrink: 0;
    font-size: 12px;
    color: var(--knn-text-color-placeholder, #86909C);
}
.knn-block-posts-empty {
    padding: 20px;
    text-align: center;
    color: var(--knn-text-color-placeholder, #86909C);
    font-size: 14px;
}

/* ---------- 幻灯片 ---------- */
.knn-block-slider {
    position: relative;
    margin: 16px 0;
    border-radius: 8px;
    overflow: hidden;
    background: var(--knn-bg-color-grey, #F2F3F5);
    line-height: 0;
}
.knn-block-slides {
    position: relative;
}
.knn-block-slide {
    display: none;
}
.knn-block-slide.active {
    display: block;
}
.knn-block-slide img {
    width: 100%;
    display: block;
    max-height: 400px;
    object-fit: cover;
}
.knn-block-slide a {
    display: block;
    line-height: 0;
}
.knn-block-slide-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 10px 16px;
    font-size: 14px;
    color: #fff;
    background: linear-gradient(transparent, rgba(0, 0, 0, .55));
    line-height: 1.4;
}
.knn-block-slider-dots {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
    z-index: 2;
}
.knn-block-slide-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .5);
    cursor: pointer;
    transition: background .2s;
}
.knn-block-slide-dot.active {
    background: #fff;
}
.knn-block-slider-prev,
.knn-block-slider-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, .3);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
    z-index: 2;
    opacity: 0;
    transition: opacity .2s;
}
.knn-block-slider:hover .knn-block-slider-prev,
.knn-block-slider:hover .knn-block-slider-next {
    opacity: 1;
}
.knn-block-slider-prev { left: 10px; }
.knn-block-slider-next { right: 10px; }
.knn-block-slider-prev:hover,
.knn-block-slider-next:hover {
    background: rgba(0, 0, 0, .5);
}

/* ---------- 引言（C10 古腾堡区块，--knn-quote-color 由区块选色写入） ---------- */
.knn-block-quote {
    position: relative;
    margin: 16px 0;
    padding: 18px 20px 18px 52px;
    border-radius: 8px;
    background: var(--knn-bg-color, #F7F8FA);
    border-left: 4px solid var(--knn-quote-color, var(--knn-color-primary, #409EFF));
}
.knn-block-quote-icon {
    position: absolute;
    left: 18px;
    top: 20px;
    font-size: 18px;
    color: var(--knn-quote-color, var(--knn-color-primary, #409EFF));
    opacity: .55;
}
.knn-block-quote-text {
    font-size: 15px;
    color: var(--knn-text-color, #4E5969);
    line-height: 1.8;
}
.knn-block-quote-cite {
    margin-top: 8px;
    font-size: 13px;
    color: var(--knn-text-color-placeholder, #86909C);
}
.knn-block-quote-cite::before {
    content: '—— ';
}

/* ---------- 主题标题（C10 古腾堡区块） ---------- */
.knn-block-title {
    margin: 24px 0 16px;
    font-size: 20px;
    font-weight: 600;
    color: var(--knn-forum-title-color, #272E3B);
    line-height: 1.4;
}
.knn-block-title.style-bar {
    padding-left: 12px;
    border-left: 4px solid var(--knn-color-primary, #409EFF);
}
.knn-block-title.style-line {
    padding-bottom: 10px;
    border-bottom: 2px solid var(--knn-border-color, #E5E6EB);
}
.knn-block-title.style-line .knn-block-title-text {
    box-shadow: inset 0 -2px 0 var(--knn-color-primary, #409EFF);
    padding-bottom: 10px;
}
.knn-block-title.style-center {
    display: flex;
    align-items: center;
    gap: 14px;
    text-align: center;
    justify-content: center;
}
.knn-block-title.style-center::before,
.knn-block-title.style-center::after {
    content: '';
    flex: 1;
    max-width: 80px;
    height: 1px;
    background: var(--knn-border-color, #E5E6EB);
}

/* ---------- 文章卡片（C10 古腾堡区块） ---------- */
.knn-block-postsbox {
    margin: 16px 0;
    border: 1px solid var(--knn-border-color, #E5E6EB);
    border-radius: 8px;
    background: var(--knn-bg-color-card, #fff);
    overflow: hidden;
    transition: box-shadow .2s;
}
.knn-block-postsbox:hover {
    box-shadow: 0 4px 12px rgba(64, 158, 255, .12);
}
.knn-block-postsbox-link {
    display: flex;
    gap: 14px;
    padding: 14px 16px;
    text-decoration: none;
    color: inherit;
}
.knn-block-postsbox-thumb {
    flex-shrink: 0;
    width: 120px;
    height: 80px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--knn-bg-color-grey, #F2F3F5);
}
.knn-block-postsbox-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.knn-block-postsbox-info {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0;
}
.knn-block-postsbox-title {
    font-size: 15px;
    font-weight: 500;
    color: var(--knn-forum-title-color, #272E3B);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.knn-block-postsbox-desc {
    font-size: 13px;
    color: var(--knn-text-color, #4E5969);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.knn-block-postsbox-meta {
    font-size: 12px;
    color: var(--knn-text-color-placeholder, #86909C);
}

/* ---------- 商品卡片（C10 古腾堡区块，内部复用 shop.css 商品卡） ---------- */
.knn-block-productbox {
    margin: 16px 0;
    max-width: 360px;
}
.knn-block-productbox .product-item {
    margin: 0;
}

/* ---------- 区块错误占位（仅管理员可见） ---------- */
.knn-block-box-error {
    padding: 12px 16px;
    border: 1px dashed #F56C6C;
    border-radius: 8px;
    color: #c0392b;
    background: rgba(245, 108, 108, .06);
    font-size: 13px;
}

/* ---------- 亮点（C10 古腾堡区块） ---------- */
.knn-block-feature {
    margin: 16px 0;
    padding: 20px 16px;
    text-align: center;
    border-radius: 8px;
    background: var(--knn-bg-color-card, #fff);
    box-shadow: 0 0 10px var(--knn-shadow-color, rgba(0, 0, 0, .06));
    transition: box-shadow .25s;
}
.knn-block-feature:hover {
    box-shadow: none;
}
.knn-block-feature .feature-icon {
    font-size: 46px;
    line-height: 1;
    padding: 6px 0 14px;
    color: var(--knn-color-primary, #409EFF);
}
.knn-block-feature .feature-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--knn-forum-title-color, #272E3B);
}
.knn-block-feature .feature-note {
    margin-top: 5px;
    font-size: 13px;
    line-height: 1.6;
    color: var(--knn-text-color-placeholder, #86909C);
}

/* ---------- 高亮代码（C10 古腾堡区块，头部栏由 forum-blocks.js 包装注入） ---------- */
pre.knn-block-code {
    margin: 16px 0;
    padding: 16px 18px;
    border-radius: 8px;
    background: #282c34;
    color: #abb2bf;
    font-size: 13px;
    line-height: 1.7;
    overflow-x: auto;
    tab-size: 4;
}
pre.knn-block-code code {
    display: block;
    background: none;
    color: inherit;
    padding: 0;
    font-family: Consolas, Monaco, 'Courier New', monospace;
    white-space: pre;
    word-break: normal;
}
.knn-block-code-wrap {
    margin: 16px 0;
    border-radius: 8px;
    overflow: hidden;
    background: #282c34;
}
.knn-block-code-wrap pre.knn-block-code {
    margin: 0;
    border-radius: 0;
}
.knn-block-code-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: rgba(255, 255, 255, .06);
    border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.knn-block-code-lang {
    font-size: 12px;
    color: #7f8896;
    text-transform: uppercase;
    letter-spacing: .5px;
    font-family: Consolas, Monaco, monospace;
}
.knn-block-code-copy {
    border: none;
    background: none;
    padding: 2px 6px;
    font-size: 12px;
    color: #9aa3b2;
    cursor: pointer;
    border-radius: 4px;
    transition: color .2s, background .2s;
}
.knn-block-code-copy:hover {
    color: #fff;
    background: rgba(255, 255, 255, .1);
}
.knn-block-code-copy.copied {
    color: #67C23A;
}
/* 轻量语法着色（forum-blocks.js 注入 token span） */
.knn-block-code .knn-tok-com { color: #5c6370; font-style: italic; }
.knn-block-code .knn-tok-str { color: #98c379; }
.knn-block-code .knn-tok-num { color: #d19a66; }
.knn-block-code .knn-tok-kw  { color: #c678dd; }

/* ---------- 无缝图（C10 古腾堡区块，内部为 core/gallery） ---------- */
.knn-block-seamless {
    margin: 16px 0;
    line-height: 0;
}
.knn-block-seamless .wp-block-gallery {
    display: block !important;
    margin: 0 !important;
    gap: 0 !important;
}
.knn-block-seamless .wp-block-gallery .wp-block-image,
.knn-block-seamless .wp-block-gallery figure {
    width: 100% !important;
    margin: 0 !important;
    border-radius: 0;
}
.knn-block-seamless .wp-block-gallery img {
    width: 100% !important;
    display: block;
    border-radius: 0 !important;
}
/* 撑满文章容器：抵消 .article-widget 的 15px 内边距 */
.article-widget .knn-block-seamless.full-container {
    margin-left: -15px;
    margin-right: -15px;
}