/* =====================================================
   博客 — 列表页 / 文章详情页（复用 style.css 设计变量）
   ===================================================== */

/* ---------- 导航当前页高亮 ---------- */
.header__nav-link.is-active {
  color: var(--color-brand-blue);
  font-weight: 500;
}

/* ---------- 博客页头（编辑式排版） ---------- */
.blog-hero {
  padding: calc(96px + 64px) 0 44px;
  text-align: left;
}
.blog-hero__eyebrow {
  margin: 0 0 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}
.blog-hero__title {
  font-size: 60px;
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.025em;
  color: var(--color-text-heading);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.blog-hero__subtitle {
  margin-top: 20px;
  max-width: 540px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text-regular);
}

/* ---------- 主内容区（与详情页一致的卡片背景） ---------- */
.blog-main {
  padding-bottom: 96px;
}
.blog-main .container {
  background: var(--color-bg-section);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 36px 40px 44px;
}

/* ---------- 分类筛选 ---------- */
.blog-toolbar {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 44px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}
.blog-filter {
  padding: 8px 20px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-bg-card);
  color: var(--color-text-regular);
  font-size: 13px;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all 0.15s var(--ease-out);
}
.blog-filter:hover {
  border-color: var(--color-border-hover);
  color: var(--color-text-primary);
}
.blog-filter.is-active {
  border-color: transparent;
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 500;
}

/* ---------- 文章卡片列表（上图下标题，桌面四列 / 移动两列） ---------- */
.blog-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.blog-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  overflow: hidden;
  transition: transform 0.28s var(--ease-out), box-shadow 0.28s var(--ease-out), border-color 0.28s;
  animation: blogCardIn 0.5s var(--ease-out) backwards;
}
@keyframes blogCardIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}
.blog-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
}
.blog-card__cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--color-bg-section);
  transition: transform 0.5s var(--ease-out);
}
.blog-card:hover .blog-card__cover {
  transform: scale(1.05);
}
.blog-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 20px 22px 22px;
}
.blog-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
  margin-top: auto;
}
.blog-card__category {
  padding: 3px 11px;
  border-radius: 999px;
  background: rgba(38, 165, 228, 0.12);
  color: var(--color-brand-blue);
  font-size: 12px;
  letter-spacing: 0.02em;
}
.blog-card__title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--color-text-heading);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.blog-card:hover .blog-card__title {
  color: var(--color-brand-blue);
}


/* ---------- 空状态 ---------- */
.blog-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 0;
  color: var(--color-text-secondary);
  font-size: 14px;
}
.blog-empty__icon {
  font-size: 40px;
  margin-bottom: 12px;
  opacity: 0.6;
}

/* ---------- 分页（与后台 .pagination 同构，适配公开页主题） ---------- */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.pagination span {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-right: 8px;
}
.pagination button {
  min-width: 34px;
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s;
}
.pagination button:hover:not(:disabled) {
  background: var(--color-bg-card-hover);
}
.pagination button.active {
  border-color: transparent;
  background: var(--gradient-primary);
  color: #fff;
}
.pagination button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* =====================================================
   文章详情页
   ===================================================== */
/* ---------- 详情页布局：左侧边导航 + 正文 ---------- */
.article-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 36px;
  align-items: start;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: calc(96px + 48px) var(--spacing-md) 96px;
}
.article {
  min-width: 0;
}
.article-side-col {
  position: sticky;
  top: 88px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.article-side {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 20px 22px 12px;
}
.article-side__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.article-side__heading {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}
.article-side__all {
  font-size: 12px;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}
.article-side__all:hover {
  color: var(--color-brand-blue);
}
/* 分类导航 */
.article-cat-list {
  display: flex;
  flex-direction: column;
}
@keyframes sideIn {
  from { opacity: 0; transform: translateX(-8px); }
  to { opacity: 1; transform: translateX(0); }
}
.article-cat {
  display: block;
  padding: 9px 0;
  font-size: 13px;
  color: var(--color-text-regular);
  text-decoration: none;
  transition: color 0.15s;
  animation: sideIn 0.4s var(--ease-out) backwards;
}
.article-cat:hover {
  color: var(--color-brand-blue);
}
.article-cat.is-active {
  color: var(--color-brand-blue);
  font-weight: 500;
}
.article-side__list {
  display: flex;
  flex-direction: column;
}
.article-side__item {
  display: block;
  padding: 13px 0;
  border-top: 1px solid var(--color-border);
  text-decoration: none;
  animation: sideIn 0.4s var(--ease-out) backwards;
}
.article-side__item-title {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--color-text-regular);
  transition: color 0.15s;
}
.article-side__item:hover .article-side__item-title {
  color: var(--color-brand-blue);
}
.article-side__item-meta {
  display: block;
  margin-top: 5px;
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--color-text-secondary);
}
.article-side__empty {
  padding: 20px 0;
  font-size: 12.5px;
  color: var(--color-text-secondary);
  text-align: center;
}

/* ---------- 正文底部：上一篇 / 下一篇 ---------- */
.article-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--color-border);
}
.article-pager:empty {
  display: none;
}
.article-pager__item {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s;
}
.article-pager__item:hover {
  border-color: var(--color-border-hover);
  background: var(--color-bg-section);
}
.article-pager__prev {
  grid-column: 1;
}
.article-pager__next {
  grid-column: 2;
  text-align: right;
}
.article-pager__label {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
}
.article-pager__title {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text-regular);
}
.article-pager__item:hover .article-pager__title {
  color: var(--color-brand-blue);
}
/* ---------- 面包屑 ---------- */
.crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}
.crumbs a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}
.crumbs a:hover {
  color: var(--color-brand-blue);
}
.crumbs__sep {
  opacity: 0.5;
  padding: 0 2px;
}
.crumbs__current {
  color: var(--color-text-regular);
  max-width: 480px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.article__content .crumbs {
  margin-bottom: 26px;
}
@keyframes articleIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.article__content {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 48px 52px 56px;
  animation: articleIn 0.55s var(--ease-out) backwards;
}
.article__header {
  margin-bottom: 36px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
}
.article__title {
  font-size: 46px;
  font-weight: 700;
  color: var(--color-text-heading);
  line-height: 1.16;
  letter-spacing: -0.025em;
}
.article__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--color-text-secondary);
}
.article__category {
  padding: 3px 12px;
  border-radius: 999px;
  background: rgba(38, 165, 228, 0.12);
  color: var(--color-brand-blue);
  font-size: 12px;
  letter-spacing: 0.02em;
}
/* ---------- Markdown 正文排版 ---------- */
.article-body {
  font-size: 16.5px;
  line-height: 1.82;
  color: var(--color-text-primary);
  word-break: break-word;
}
.article-body > :first-child {
  margin-top: 0;
}
.article-body h1,
.article-body h2,
.article-body h3,
.article-body h4,
.article-body h5,
.article-body h6 {
  color: var(--color-text-heading);
  font-weight: 600;
  margin: 48px 0 18px;
  line-height: 1.35;
  letter-spacing: -0.01em;
}
.article-body h1 { font-size: 28px; }
.article-body h2 {
  font-size: 23px;
  padding-left: 14px;
  border-left: 4px solid;
  border-image: var(--gradient-accent-1) 1;
}
.article-body h3 { font-size: 20px; }
.article-body h4 { font-size: 17px; }
.article-body p {
  margin: 18px 0;
}
.article-body a {
  color: var(--color-brand-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
}
.article-body a:hover {
  border-bottom-color: var(--color-brand-blue);
}
.article-body strong {
  color: var(--color-text-heading);
}
.article-body ul,
.article-body ol {
  margin: 14px 0;
  padding-left: 28px;
}
.article-body li {
  margin: 6px 0;
}
.article-body li::marker {
  color: var(--color-text-secondary);
}
.article-body blockquote {
  margin: 20px 0;
  padding: 12px 20px;
  border-left: 4px solid;
  border-image: var(--gradient-accent-2) 1;
  background: var(--color-bg-section);
  border-radius: 0 8px 8px 0;
  color: var(--color-text-regular);
}
.article-body blockquote p {
  margin: 4px 0;
}
.article-body code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.88em;
  background: rgba(88, 101, 242, 0.12);
  color: #c4b5fd;
  padding: 2px 7px;
  border-radius: 5px;
  border: 1px solid rgba(88, 101, 242, 0.2);
}
.article-body pre {
  margin: 20px 0;
  padding: 18px 20px;
  background: #14141b;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  overflow-x: auto;
  line-height: 1.7;
}
.article-body pre code {
  background: none;
  border: none;
  padding: 0;
  color: #e4e4e7;
  font-size: 13.5px;
}
.article-body table {
  width: 100%;
  margin: 20px 0;
  border-collapse: collapse;
  font-size: 14px;
  display: block;
  overflow-x: auto;
}
.article-body th,
.article-body td {
  border: 1px solid var(--color-border-hover);
  padding: 9px 14px;
  text-align: left;
}
.article-body th {
  background: var(--color-bg-section);
  color: var(--color-text-heading);
  font-weight: 600;
  white-space: nowrap;
}
.article-body tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.02);
}
.article-body img {
  max-width: 100%;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  margin: 8px 0;
}
.article-body video,
.article-body iframe {
  display: block;
  width: 100%;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: #000;
  margin: 16px 0;
}
.article-body hr {
  border: none;
  height: 1px;
  background: var(--color-border);
  margin: 36px 0;
}

/* mermaid 图表容器 */
.article-body .mermaid,
.article-body pre.mermaid {
  background: transparent;
  border: none;
  padding: 0;
  text-align: center;
}
.article-body .mermaid svg {
  max-width: 100%;
  height: auto;
}
.article-body pre.mermaid code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  white-space: pre-wrap;
}

/* 404 状态 */
.article-404 {
  text-align: center;
  padding: 120px 0;
}
.article-404__icon {
  font-size: 56px;
  margin-bottom: 16px;
  opacity: 0.7;
}
.article-404__title {
  font-size: 20px;
  color: var(--color-text-heading);
  margin-bottom: 8px;
}
.article-404__desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
}

/* ---------- 正文图片放大（lightbox） ---------- */
.article-body img {
  cursor: zoom-in;
}
.img-lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 10, 14, 0.88);
  backdrop-filter: blur(6px);
  padding: 48px;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.25s var(--ease-out), visibility 0s linear 0.25s;
}
.img-lightbox--open {
  visibility: visible;
  opacity: 1;
  transition: opacity 0.25s var(--ease-out);
}
@keyframes lightboxIn {
  from { transform: scale(0.96); }
  to { transform: scale(1); }
}
.img-lightbox--open .img-lightbox__img {
  animation: lightboxIn 0.25s var(--ease-out);
}
.img-lightbox__img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 16px 64px rgba(0, 0, 0, 0.55);
  cursor: zoom-out;
}
.img-lightbox__close {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-bg-card);
  color: var(--color-text-regular);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.img-lightbox__close:hover {
  border-color: var(--color-border-hover);
  color: var(--color-text-heading);
}
.img-lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-bg-card);
  color: var(--color-text-regular);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.img-lightbox__nav:hover {
  border-color: var(--color-border-hover);
  color: var(--color-text-heading);
}
.img-lightbox__prev {
  left: 24px;
}
.img-lightbox__next {
  right: 24px;
}

@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-side-col {
    position: static;
    order: 2;
  }
}
@media (max-width: 640px) {
  .blog-list { grid-template-columns: repeat(2, 1fr); }
  .blog-main .container { padding: 24px 20px 32px; }
  .blog-hero { padding-top: calc(96px + 40px); }
  .blog-hero__eyebrow { letter-spacing: 0.2em; }
  .blog-hero__title { font-size: 40px; }
  .article-layout { padding: calc(96px + 32px) var(--spacing-sm) 64px; }
  .article__content { padding: 32px 24px 40px; }
  .article__title { font-size: 32px; }
  .article-pager { grid-template-columns: 1fr; }
  .article-pager__prev,
  .article-pager__next {
    grid-column: auto;
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  .blog-card,
  .article__content,
  .article-side__item,
  .article-cat,
  .img-lightbox,
  .img-lightbox--open .img-lightbox__img {
    animation: none;
    transition: none;
  }
}