feat(frontend): deepen single post 1:1 parity with Zibll

Split related style/source settings, add subtitle/meta/allow-view helpers, align cover/author/tags/pay shell markup and CSS with Zibll single.

assets/css/frontend/single-post/author-actions.css

@@ -540,3 +540,11 @@ html.dark .post-drop-meta__item:hover {
 .post-actions .action i {
   font-size: 16px;
 }
+
+
+.article-tags br { flex-basis: 100%; width: 100%; content: ""; display: block; height: 0; }
+.article-tags .but.c-blue { color: #2196f3; }
+.article-tags .but.c-yellow { color: #f0ad4e; }
+.article-tags .but.c-green { color: #5cb85c; }
+.article-tags .but.c-purple { color: #9c27b0; }
+.article-tags .but.c-red { color: #f44336; }

assets/css/frontend/single-post/cover.css

@@ -211,5 +211,65 @@
 .single-head-cover .cover-meta.single-metabox {
     display: flex; flex-wrap: wrap; gap: 8px 12px; font-size: 12px; color: var(--color-ink-4);
 }
-.aksrt-single-pay-box { margin: 16px 0 20px; }
-.aksrt-single-pay-box .pay-box, .aksrt-single-pay-box .aksrt-paywall { margin: 0; }
+/* Pay box root — Zibll #posts-pay.zib-widget.pay-box */
+#posts-pay.zib-widget,
+#posts-pay.pay-box,
+.aksrt-single-pay-box {
+  margin: 16px 0 20px;
+}
+#posts-pay .aksrt-paywall,
+.aksrt-single-pay-box .pay-box,
+.aksrt-single-pay-box .aksrt-paywall {
+  margin: 0;
+}
+
+/* Cover meta pills + title-h-left */
+.single-cover-con .article-title.title-h-left,
+.single-cover .article-title.title-h-left {
+  color: #fff;
+  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.45);
+  margin: 0;
+}
+.single-metabox.cover-meta,
+.cover-meta.abs-right {
+  position: absolute;
+  top: 12px;
+  right: 12px;
+  z-index: 3;
+  color: #fff;
+}
+.single-metabox .post-metas item,
+.single-metabox .post-metas item a {
+  color: inherit;
+  opacity: 0.92;
+  margin-left: 10px;
+  font-size: 12px;
+}
+.single-metabox .post-metas item .fa,
+.single-metabox .post-metas item i {
+  margin-right: 3px;
+  opacity: 0.9;
+}
+.single-cover-slide-wrap {
+  position: relative;
+  overflow: hidden;
+  border-radius: var(--radius-2xl, 16px);
+}
+.single-cover-slide-wrap .abs-center.left-bottom {
+  z-index: 2;
+  padding: 18px 20px;
+  color: #fff;
+}
+.article-avatar name.flex {
+  gap: 4px;
+  flex-wrap: wrap;
+}
+.article-avatar .aksrt-vip-badge,
+.article-avatar .aksrt-identity-chip {
+  font-size: 12px;
+  line-height: 1.2;
+  vertical-align: middle;
+}
+.article-avatar .display-name {
+  margin-right: 2px;
+}

assets/css/frontend/single-post/related-toc.css

@@ -549,3 +549,26 @@ html.dark .article-end-separator span {
 .post-nav-box__item.is-empty {
     visibility: hidden;
 }
+
+
+/* ===== Related (Zibll .relates / .relates-thumb) ===== */
+.relates .title-theme { margin-bottom: 0; }
+.relates .zib-widget { padding: 12px 15px; }
+.relates ul.no-thumb { list-style: none; margin: 0; padding: 0; }
+.relates ul.no-thumb li { padding: 6px 0; border-bottom: 1px dashed var(--color-line, rgba(0,0,0,.06)); }
+.relates ul.no-thumb li:last-child { border-bottom: 0; }
+.relates ul.no-thumb a.icon-circle { color: inherit; text-decoration: none; }
+.relates ul.no-thumb a.icon-circle:hover { color: var(--focus-color, #f04494); }
+.relates-thumb .swiper-scroll { padding-bottom: 4px; }
+.relates-thumb .swiper-slide { width: 200px; max-width: 70vw; }
+.relates-thumb .graphic.style-3 { position: relative; overflow: hidden; border-radius: 8px; }
+.relates-thumb .graphic.style-3 .graphic-img { position: relative; overflow: hidden; background: var(--surface-2, #f3f4f6); }
+.relates-thumb .graphic.style-3 img.fit-cover { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
+.relates-thumb .graphic.style-3 .graphic-text { padding: 10px 12px; width: 100%; background: linear-gradient(transparent, rgba(0,0,0,.55)); color: #fff; }
+.relates-thumb .graphic.style-3 .text1 { font-size: 13px; font-weight: 600; color: #fff; }
+.relates-thumb .graphic.style-3 .text3 { opacity: .9; margin-top: 4px; }
+
+/* Colored tag pills on single */
+.article-tags .but { display: inline-flex; align-items: center; gap: 4px; margin: 0 6px 6px 0; }
+.article-tags .but.ml6 { margin-left: 0; }
+.allow-view-deny { margin: 20px 0; }