/* pages/articles.css —— 文章列表（body.page-articles）与文章详情（body.page-post），规则全部以 body class 开头。
   通用正文 .article-body（代码块头栏、提示块、表格、标题锚点、引用、图片）在 components.css，
   增强脚本是 markdown.js 的 enhanceArticleBody；这里只写文章详情特有的字号与节奏。 */

/* =========================================================================
   v2 文章列表：body.page-articles
   ========================================================================= */

/* ---------- 页头：点阵 + 双柔光，标题墨色渐变，下方一枚大号搜索框 ---------- */
.page-articles .articles-hero-glow {
  --glow-size: 620px;
  --glow-alpha: .14;
  --glow-dur: 30s;
  top: -300px;
  left: -180px;
}
.page-articles .articles-hero { padding-bottom: 56px; }
/* 标题用满内容栏（1200）。之前 13em 的上限会在宽屏上把稍长的标题压成左半边短行，
   右侧只剩背景照片；正文导语仍按 .page-hero .lead 的 680 保持阅读宽度。 */
.page-articles .articles-hero h1 {
  max-width: none;
  line-height: 1.1;
  padding-bottom: .08em;
  background: linear-gradient(180deg, var(--ink-900) 35%, var(--navy-700) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}
.page-articles .articles-hero .lead { margin-top: var(--space-4); }

.page-articles .articles-search {
  display: flex;
  max-width: 600px;
  margin-top: var(--space-7);
}
.page-articles .articles-search-field { flex: 1; }
.page-articles .articles-search-field > input {
  height: 52px;
  padding-left: 46px;
  padding-right: 52px;
  border-color: var(--c-line-strong);
  border-radius: var(--r-pill);
  background: var(--c-surface);
  box-shadow: var(--shadow-sm);
  font-size: var(--fs-base);
  transition: border-color var(--motion), box-shadow var(--motion);
}
.page-articles .articles-search-field > input:focus { box-shadow: var(--ring), var(--shadow-md); }
.page-articles .articles-search-field > input::-webkit-search-cancel-button { display: none; }
.page-articles .articles-search-field > kbd { right: 18px; }
/* 放大镜：CSS 画的圆 + 柄 */
.page-articles .articles-search-icon {
  position: absolute;
  top: 50%;
  left: 20px;
  width: 15px;
  height: 15px;
  border: 1.5px solid var(--c-text-3);
  border-radius: 50%;
  transform: translateY(-58%);
  pointer-events: none;
  transition: border-color var(--motion);
}
.page-articles .articles-search-icon::after {
  content: "";
  position: absolute;
  right: -5px;
  bottom: -4px;
  width: 6px;
  height: 1.5px;
  border-radius: 1px;
  background: var(--c-text-3);
  transform: rotate(45deg);
  transition: background-color var(--motion);
}
.page-articles .articles-search-field:focus-within .articles-search-icon { border-color: var(--c-brand); }
.page-articles .articles-search-field:focus-within .articles-search-icon::after { background: var(--c-brand); }

.page-articles .articles-hero .page-kpi { margin-top: var(--space-7); }

/* ---------- 主体 ---------- */
.page-articles .articles-layout { gap: clamp(32px, 4vw, 56px); }
.page-articles .articles-aside {
  position: sticky;
  top: calc(var(--header-space) + var(--space-5));
}

/* 工具行：标签胶囊 + 结果数 */
.page-articles .articles-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3) var(--space-5);
  margin-bottom: var(--space-5);
}
/* 标签胶囊：.filter-chips / .filter-chip 在 components.css */
.page-articles .articles-count {
  flex: none;
  color: var(--c-text-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-variant-numeric: tabular-nums;
}
.page-articles .articles-count:empty { display: none; }

/* ---------- 文章卡网格：封面 16:9 统一，整卡可点，聚光边框 ---------- */
.page-articles .article-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
}
.page-articles .article-list > .empty-state { grid-column: 1 / -1; }
.page-articles .article-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  padding: 0 0 var(--space-5);
  overflow: hidden;
}
.page-articles .article-card:hover {
  border-color: var(--c-line-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.page-articles .article-card:nth-child(2n) { --reveal-delay: 70ms; }
.page-articles .article-card > :not(.article-cover) { margin-inline: var(--space-5); }

.page-articles .article-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  margin-bottom: var(--space-2);
  overflow: hidden;
  border-bottom: 1px solid var(--c-line);
  background: var(--c-surface-2);
}
.page-articles .article-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-4) var(--ease);
}
.page-articles .article-card:hover .article-cover img { transform: scale(1.035); }
/* 无封面：浅品牌底 + 点阵 + 第一个标签做字样 */
.page-articles .article-cover.is-placeholder {
  display: flex;
  align-items: flex-end;
  padding: var(--space-5);
  background:
    radial-gradient(ellipse 70% 90% at 100% 0%, rgba(var(--brand-rgb), .14), transparent 65%),
    radial-gradient(var(--grid-dot) 1px, transparent 1.4px) 0 0 / 18px 18px,
    linear-gradient(160deg, var(--blue-50), var(--c-surface-2));
}
.page-articles .article-cover.is-placeholder > span {
  max-width: 100%;
  overflow: hidden;
  padding-bottom: .1em;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.03em;
  white-space: nowrap;
  text-overflow: ellipsis;
  transition: transform var(--dur-4) var(--ease);
}
.page-articles .article-card:hover .article-cover.is-placeholder > span { transform: translateY(-4px); }

.page-articles .article-card .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 2px var(--space-2);
  color: var(--c-text-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-variant-numeric: tabular-nums;
}
.page-articles .article-card .meta > span { white-space: nowrap; }
.page-articles .article-card .meta > span + span::before {
  content: "·";
  margin-right: var(--space-2);
  color: var(--c-border-strong);
}
.page-articles .article-card > h2 {
  display: -webkit-box;
  overflow: hidden;
  font-size: var(--fs-lg);
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: -.01em;
  overflow-wrap: anywhere;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.page-articles .article-card > h2 a {
  color: var(--c-text);
  background-image: linear-gradient(currentColor, currentColor);
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-size: 0 1px;
  transition: color var(--dur-2) var(--ease), background-size var(--dur-4) var(--ease);
}
/* 整卡可点：标题链接的伪元素铺满卡片 */
.page-articles .article-card > h2 a::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: var(--r-lg);
}
.page-articles .article-card:hover > h2 a {
  color: var(--c-brand);
  background-size: 100% 1px;
}
.page-articles .article-card > p {
  display: -webkit-box;
  overflow: hidden;
  color: var(--c-text-2);
  font-size: var(--fs-sm);
  line-height: 1.7;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.page-articles .article-card > p:empty { display: none; }
.page-articles .article-card > .contact-row:empty { display: none; }
.page-articles .article-card > .card-footer {
  flex-wrap: nowrap;
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--c-line);
}

/* 作者：头像叠放，只显示第一位作者的名字 */
.page-articles .article-card-authors {
  flex-wrap: nowrap;
  align-items: center;
  gap: 0;
  min-width: 0;
  overflow: hidden;
}
.page-articles .article-card-authors > .author-chip { display: contents; }
.page-articles .article-card-authors .author-avatar {
  width: 26px;
  height: 26px;
  box-shadow: 0 0 0 2px var(--c-surface);
}
.page-articles .article-card-authors > .author-chip + .author-chip > .author-avatar { margin-left: -7px; }
.page-articles .article-card-authors > .author-chip > span:last-child { display: none; }
.page-articles .article-card-authors > .author-chip:first-child > span:last-child {
  display: block;
  order: 10;
  min-width: 0;
  margin-left: var(--space-2);
  overflow: hidden;
  color: var(--c-text-2);
  font-size: 13px;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.page-articles .article-card .read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--c-text-3);
  font-size: 13px;
  transition: color var(--dur-2) var(--ease), transform var(--dur-3) var(--ease);
}
.page-articles .article-card:hover .read-more { color: var(--c-brand); transform: translateX(3px); }
.page-articles .article-card:hover .read-more > .arrow::before { opacity: 1; transform: none; }
.page-articles .article-card:hover .read-more > .arrow::after { transform: translate(0, -50%) rotate(45deg); }

.page-articles [data-article-empty] { margin-top: var(--space-5); }
.page-articles .pagination { margin-top: var(--space-7); }

/* 侧栏：知识库小卡（浅色品牌底） */
.page-articles .articles-docs-card {
  border-color: rgba(var(--brand-rgb), .16);
  background:
    radial-gradient(120% 80% at 100% 0%, rgba(var(--brand-rgb), .09), transparent 60%),
    linear-gradient(180deg, var(--blue-50), var(--c-surface));
}
.page-articles .articles-docs-kicker {
  margin-bottom: var(--space-2);
  color: var(--c-brand);
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  font-weight: 600;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
}
.page-articles .articles-docs-card h3 { margin-bottom: var(--space-2); font-size: var(--fs-lg); letter-spacing: -.01em; }
.page-articles .articles-docs-card p:not(.articles-docs-kicker) {
  margin-bottom: var(--space-4);
  color: var(--c-text-2);
  font-size: var(--fs-sm);
  line-height: 1.7;
}

/* =========================================================================
   v2 文章详情：body.page-post
   ========================================================================= */

/* ---------- 页头 ---------- */
.page-post .post-hero { padding-block: 56px 48px; }
/* 标题（以及同栏的作者行细线）用满内容栏，不再对齐正文栏的 860。
   正文阅读宽度由 .article-layout 控制，不受影响。 */
.page-post .post-hero-copy { max-width: none; }
.page-post .post-hero-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}
.page-post .post-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 30px;
  padding: 0 14px 0 10px;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--r-pill);
  background: var(--c-surface-glass);
  color: var(--c-text-2);
  font-size: 13px;
  font-weight: 500;
  transition: border-color var(--motion), color var(--motion);
}
.page-post .post-back > .arrow { transform: scaleX(-1); }
.page-post .post-back:hover { border-color: rgba(var(--brand-rgb), .4); color: var(--c-brand-strong); }
.page-post .post-hero-tags .tag { transition: border-color var(--motion), color var(--motion); }
.page-post .post-hero-tags .tag:hover { border-color: rgba(var(--brand-rgb), .4); color: var(--c-brand-strong); }
.page-post .post-hero h1 {
  max-width: none;
  font-size: clamp(30px, 4.4vw, 52px);
  line-height: 1.15;
  padding-bottom: .08em;
  background: linear-gradient(180deg, var(--ink-900) 35%, var(--navy-700) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}
.page-post .post-hero .lead { max-width: 720px; margin-top: var(--space-4); }

/* 作者行：头像 + 名字，右侧日期 / 时长 / 阅读量 */
.page-post .post-byline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-5);
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--c-line);
}
.page-post .post-byline[hidden] { display: none; }
.page-post .post-byline .author-collection { gap: var(--space-2) var(--space-4); }
.page-post .post-byline .author-chip { font-weight: 500; }
.page-post .post-byline .author-avatar {
  width: 32px;
  height: 32px;
  font-size: var(--fs-xs);
  box-shadow: 0 0 0 1px var(--c-line);
}
.page-post .article-byline-facts {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 2px var(--space-2);
  color: var(--c-text-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-variant-numeric: tabular-nums;
}
.page-post .article-byline-facts > span + span::before {
  content: "·";
  margin-right: var(--space-2);
  color: var(--c-border-strong);
}

/* ---------- 布局：正文 + 侧栏（目录吸顶） ---------- */
.page-post .article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  align-items: stretch;
  gap: clamp(40px, 6vw, 88px);
}
.page-post .post-main { min-width: 0; max-width: 760px; }
.page-post .toc {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-width: 0;
}
.page-post .article-toc-card {
  position: sticky;
  top: calc(var(--header-space) + var(--space-5));
}
.page-post .article-toc-card[hidden] { display: none; }

.page-post .post-cover {
  aspect-ratio: 2 / 1;
  margin: 0 0 var(--space-7);
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: var(--c-surface-2);
  box-shadow: var(--shadow-sm);
}
.page-post .post-cover[hidden] { display: none; }
.page-post .post-cover img { width: 100%; height: 100%; object-fit: cover; }

/* 文章信息卡 */
.page-post .post-info-card .pipeline-row { grid-template-columns: 64px minmax(0, 1fr); align-items: center; }
.page-post .post-info-card .pipeline-row > span { font-variant-numeric: tabular-nums; }

/* 目录：左侧细轨 + 当前节品牌色 */
.page-post .article-toc-card h3 {
  color: var(--c-text-3);
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  font-weight: 600;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
}
.page-post .article-toc-list {
  position: relative;
  display: grid;
  max-height: min(60vh, 520px);
  overflow-y: auto;
  border-left: 1px solid var(--c-line-strong);
  scrollbar-width: thin;
}
.page-post .article-toc-link {
  display: block;
  margin-left: -1px;
  padding: 6px var(--space-3);
  border-left: 2px solid transparent;
  color: var(--c-text-2);
  font-size: 13.5px;
  line-height: 1.5;
  overflow-wrap: anywhere;
  transition: color var(--motion), border-color var(--motion), background-color var(--motion);
}
.page-post .article-toc-link.is-subheading { padding-left: calc(var(--space-3) + 14px); color: var(--c-text-3); font-size: 13px; }
.page-post .article-toc-link:hover { color: var(--c-text); }
.page-post .article-toc-link.is-active {
  border-left-color: var(--c-brand);
  background: linear-gradient(90deg, rgba(var(--brand-rgb), .07), transparent 80%);
  color: var(--c-brand-strong);
  font-weight: 500;
}

/* ---------- 正文精修（只作用于文章详情；通用 .article-body 在 components.css） ---------- */
.page-post .post-main .article-body { font-size: var(--fs-md); line-height: 1.9; }
.page-post .article-body h1 { margin-top: 2.2em; font-size: 30px; }
.page-post .article-body h2 {
  margin-top: 2.2em;
  padding-top: 1.1em;
  border-top: 1px solid var(--c-line);
  font-size: 26px;
}
.page-post .article-body > h2:first-child { padding-top: 0; border-top: 0; }
.page-post .article-body h3 { margin-top: 1.8em; font-size: 21px; }
.page-post .article-body h4 { margin-top: 1.6em; }
.page-post .article-body .custom-block :is(h1, h2) { padding-top: 0; border-top: 0; font-size: var(--fs-lg); }

/* ---------- 文末：返回 / 编辑 / 上下篇 ---------- */
.page-post .post-end {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--c-line);
}
.page-post .post-end-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.page-post .article-pager {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
}
.page-post .article-pager[hidden] { display: none; }
.page-post .article-pager-link {
  display: grid;
  align-content: start;
  gap: 6px;
  min-width: 0;
  padding: var(--space-5);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: var(--c-surface);
  box-shadow: var(--shadow-xs);
  transition: border-color var(--dur-3) var(--ease), box-shadow var(--dur-3) var(--ease), transform var(--dur-3) var(--ease);
}
.page-post .article-pager-link.is-empty { visibility: hidden; }
.page-post .article-pager-link.is-next { text-align: right; }
.page-post .article-pager-link > span {
  color: var(--c-text-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .06em;
}
.page-post .article-pager-link > strong {
  display: -webkit-box;
  overflow: hidden;
  color: var(--c-text);
  font-size: var(--fs-base);
  font-weight: 600;
  line-height: 1.5;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  transition: color var(--motion);
}
.page-post a.article-pager-link:hover {
  border-color: rgba(var(--brand-rgb), .3);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.page-post a.article-pager-link:hover > strong { color: var(--c-brand); }

/* =========================================================================
   v2 断点
   ========================================================================= */
@media (max-width: 1024px) {
  .page-articles .articles-aside { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; }
  .page-post .article-layout { grid-template-columns: minmax(0, 1fr); }
  .page-post .post-main { max-width: none; }
  .page-post .toc { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; }
  .page-post .article-toc-card { position: static; grid-column: 1 / -1; order: -1; }
  .page-post .article-toc-list { max-height: none; }
}

@media (max-width: 720px) {
  .page-articles .articles-hero { padding-bottom: var(--space-7); }
  .page-articles .articles-search { margin-top: var(--space-6); }
  .page-articles .articles-search-field > input { height: 48px; }
  .page-articles .articles-search-field > kbd { display: none; }
  .page-articles .articles-chips {
    flex-wrap: nowrap;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
    scrollbar-width: none;
  }
  .page-articles .articles-chips::-webkit-scrollbar { display: none; }
  .page-articles .article-list { grid-template-columns: minmax(0, 1fr); gap: var(--space-4); }
  .page-articles .articles-aside { grid-template-columns: minmax(0, 1fr); }
  .page-post .post-hero { padding-block: var(--space-6); }
  .page-post .post-hero-top { margin-bottom: var(--space-5); }
  .page-post .post-cover { margin-bottom: var(--space-6); border-radius: var(--r-md); }
  .page-post .post-main .article-body { font-size: var(--fs-base); line-height: 1.85; }
  .page-post .article-body h1 { font-size: 24px; }
  .page-post .article-body h2 { font-size: 21px; }
  .page-post .article-body h3 { font-size: var(--fs-lg); }
  .page-post .toc { grid-template-columns: minmax(0, 1fr); }
  .page-post .article-pager { grid-template-columns: minmax(0, 1fr); }
  .page-post .article-pager-link.is-empty { display: none; }
  .page-post .article-pager-link.is-next { text-align: left; }
}