/* ---------------------------------------------------------------------------
 * blog.paper.yun 样式源
 * 构建时会被内容 hash 化，输出到 dist/assets/blog-<hash>.css
 * 无外部依赖、无 Web Font（中文正文用系统字体栈，省一次网络往返）
 * ------------------------------------------------------------------------ */

:root {
  --pf-blue: #165dff;
  --pf-blue-strong: #0e42d2;
  --pf-blue-soft: #e8f0ff;

  --pf-text: #1d2129;
  --pf-text-2: #4e5969;
  --pf-text-3: #86909c;

  --pf-bg: #ffffff;
  --pf-bg-soft: #f7f8fa;
  --pf-border: #e5e6eb;

  --pf-radius: 12px;
  --pf-radius-sm: 8px;
  --pf-content: 720px;
  --pf-wide: 1080px;

  --pf-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --pf-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --pf-blue: #4c88ff;
    --pf-blue-strong: #6f9dff;
    --pf-blue-soft: #16233d;

    --pf-text: #e5e6eb;
    --pf-text-2: #c9cdd4;
    --pf-text-3: #86909c;

    --pf-bg: #17171a;
    --pf-bg-soft: #1f1f23;
    --pf-border: #2e2e33;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--pf-font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--pf-text);
  background: var(--pf-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--pf-blue);
  text-decoration: none;
}

a:hover {
  color: var(--pf-blue-strong);
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

/* 跳到正文：仅键盘聚焦时可见 */
.pfBlogSkip {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 10px 16px;
  background: var(--pf-blue);
  color: #fff;
  border-radius: 0 0 var(--pf-radius-sm) 0;
  z-index: 100;
}

.pfBlogSkip:focus {
  left: 0;
  color: #fff;
  text-decoration: none;
}

/* ---------------------------------------------------------------- header */

.pfBlogHeader {
  border-bottom: 1px solid var(--pf-border);
  background: var(--pf-bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.pfBlogHeaderInner {
  max-width: var(--pf-wide);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.pfBlogBrand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: inherit;
}

.pfBlogBrand:hover {
  text-decoration: none;
  color: inherit;
}

.pfBlogBrandLogo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  flex-shrink: 0;
}

.pfBlogBrandText {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.3;
}

.pfBlogBrandName {
  font-size: 17px;
  font-weight: 600;
  white-space: nowrap;
}

.pfBlogBrandTagline {
  font-size: 12px;
  color: var(--pf-text-3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pfBlogNav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.pfBlogNavLink {
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 14px;
  color: var(--pf-text-2);
  white-space: nowrap;
}

.pfBlogNavLink:hover {
  background: var(--pf-bg-soft);
  color: var(--pf-text);
  text-decoration: none;
}

.pfBlogNavLink[aria-current="page"] {
  background: var(--pf-blue-soft);
  color: var(--pf-blue);
  font-weight: 500;
}

/* ------------------------------------------------------------------ main */

.pfBlogMain {
  max-width: var(--pf-wide);
  margin: 0 auto;
  padding: 40px 24px 72px;
}

.pfBlogHero {
  max-width: var(--pf-content);
  margin: 0 0 40px;
}

.pfBlogHeroTitle {
  margin: 0 0 8px;
  font-size: 30px;
  line-height: 1.35;
  font-weight: 700;
}

.pfBlogHeroDesc {
  margin: 0;
  color: var(--pf-text-2);
  font-size: 15px;
}

.pfBlogSectionTitle {
  max-width: var(--pf-content);
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pf-text-3);
}

/* ---------------------------------------------------------------- 列表页 */

/* 3 列网格。文章数少时按 data-count 自动降列，避免右侧留一大片空白 */
.pfBlogList {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.pfBlogList[data-count="1"] {
  grid-template-columns: minmax(0, 1fr);
  max-width: 440px;
}

.pfBlogList[data-count="2"] {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 800px;
}

.pfBlogCard {
  margin: 0;
  display: flex;
}

.pfBlogCardLink {
  display: flex;
  flex-direction: column;
  width: 100%;
  border: 1px solid var(--pf-border);
  border-radius: var(--pf-radius);
  background: var(--pf-bg);
  color: inherit;
  overflow: hidden;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.pfBlogCardLink:hover {
  text-decoration: none;
  color: inherit;
  border-color: var(--pf-blue);
  box-shadow: 0 10px 28px rgba(22, 93, 255, 0.1);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------- 封面 */

.pfBlogCardCover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(
    135deg,
    var(--pf-cv1, #165dff),
    var(--pf-cv2, #5b93ff)
  );
}

/* 自动封面配色档位。改动数量时必须同步 build-blog.mjs 的 COVER_TONES */
.pfBlogCardCover[data-tone="0"] { --pf-cv1: #165dff; --pf-cv2: #5b93ff; }
.pfBlogCardCover[data-tone="1"] { --pf-cv1: #0e8f80; --pf-cv2: #3fc4a8; }
.pfBlogCardCover[data-tone="2"] { --pf-cv1: #5b45d6; --pf-cv2: #9b82ff; }
.pfBlogCardCover[data-tone="3"] { --pf-cv1: #c95a24; --pf-cv2: #f0975a; }
.pfBlogCardCover[data-tone="4"] { --pf-cv1: #2a63c9; --pf-cv2: #63a6e6; }
.pfBlogCardCover[data-tone="5"] { --pf-cv1: #b8435c; --pf-cv2: #e5808f; }
.pfBlogCardCover[data-tone="6"] { --pf-cv1: #37854a; --pf-cv2: #6cbb74; }
.pfBlogCardCover[data-tone="7"] { --pf-cv1: #7d6236; --pf-cv2: #c0a05f; }

/* 方格纹理，呼应「稿纸」主题 */
.pfBlogCardCoverPattern {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      rgba(255, 255, 255, 0.16) 0 1px,
      transparent 1px 22px
    ),
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.16) 0 1px,
      transparent 1px 22px
    );
}

.pfBlogCardCoverGlyph {
  position: relative;
  z-index: 1;
  font-size: 58px;
  font-weight: 700;
  line-height: 1;
  color: rgba(255, 255, 255, 0.94);
  text-shadow: 0 3px 16px rgba(0, 0, 0, 0.16);
}

.pfBlogCardCoverImg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.pfBlogCardLink:hover .pfBlogCardCoverImg {
  transform: scale(1.04);
}

/* ------------------------------------------------------------- 卡片文字 */

.pfBlogCardBody {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 16px 18px 18px;
}

/* 标题与描述都裁到 2 行，保证同一行卡片等高 */
.pfBlogCardTitle {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.5;
  font-weight: 600;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.pfBlogCardDesc {
  margin: 0 0 14px;
  color: var(--pf-text-2);
  font-size: 13.5px;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.pfBlogCardMeta {
  margin-top: auto;
  padding-top: 2px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 12.5px;
  color: var(--pf-text-3);
}

.pfBlogCardTag {
  padding: 1px 9px;
  border-radius: 999px;
  background: var(--pf-bg-soft);
  border: 1px solid var(--pf-border);
  color: var(--pf-text-2);
  font-size: 11.5px;
  white-space: nowrap;
}

.pfBlogEmpty {
  max-width: var(--pf-content);
  padding: 48px 24px;
  text-align: center;
  color: var(--pf-text-3);
  border: 1px dashed var(--pf-border);
  border-radius: var(--pf-radius);
}

/* ---------------------------------------------------------------- 文章页 */

.pfBlogArticle {
  max-width: none;
  margin: 0;
}

.pfBlogArticleTitle {
  margin: 0 0 12px;
  font-size: 32px;
  line-height: 1.4;
  font-weight: 700;
}

.pfBlogArticleMeta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--pf-text-3);
}

.pfBlogTags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 28px;
}

.pfBlogTag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--pf-bg-soft);
  border: 1px solid var(--pf-border);
  color: var(--pf-text-2);
  font-size: 12px;
}

/* 正文排版 */
.pfBlogProse {
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--pf-text);
}

.pfBlogProse > *:first-child {
  margin-top: 0;
}

.pfBlogProse h2 {
  margin: 44px 0 16px;
  font-size: 23px;
  line-height: 1.5;
  font-weight: 600;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--pf-border);
}

.pfBlogProse h3 {
  margin: 34px 0 12px;
  font-size: 19px;
  line-height: 1.5;
  font-weight: 600;
}

.pfBlogProse h4 {
  margin: 26px 0 10px;
  font-size: 17px;
  font-weight: 600;
}

.pfBlogProse p {
  margin: 0 0 18px;
}

.pfBlogProse ul,
.pfBlogProse ol {
  margin: 0 0 18px;
  padding-left: 26px;
}

.pfBlogProse li {
  margin-bottom: 8px;
}

.pfBlogProse li > ul,
.pfBlogProse li > ol {
  margin: 8px 0 0;
}

.pfBlogProse blockquote {
  margin: 0 0 18px;
  padding: 4px 18px;
  border-left: 3px solid var(--pf-blue);
  background: var(--pf-bg-soft);
  border-radius: 0 var(--pf-radius-sm) var(--pf-radius-sm) 0;
  color: var(--pf-text-2);
}

.pfBlogProse blockquote > *:last-child {
  margin-bottom: 0;
}

.pfBlogProse code {
  font-family: var(--pf-mono);
  font-size: 0.88em;
  padding: 2px 6px;
  border-radius: 5px;
  background: var(--pf-bg-soft);
  border: 1px solid var(--pf-border);
}

.pfBlogProse pre {
  margin: 0 0 20px;
  padding: 16px 18px;
  overflow-x: auto;
  border-radius: var(--pf-radius-sm);
  background: var(--pf-bg-soft);
  border: 1px solid var(--pf-border);
  line-height: 1.65;
}

.pfBlogProse pre code {
  padding: 0;
  border: none;
  background: none;
  font-size: 13.5px;
}

.pfBlogProse table {
  width: 100%;
  margin: 0 0 20px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.pfBlogProse th,
.pfBlogProse td {
  padding: 9px 12px;
  border: 1px solid var(--pf-border);
  text-align: left;
}

.pfBlogProse th {
  background: var(--pf-bg-soft);
  font-weight: 600;
}

.pfBlogProse img {
  display: block;
  margin: 24px auto;
  border-radius: var(--pf-radius-sm);
  border: 1px solid var(--pf-border);
}

.pfBlogProse hr {
  margin: 36px 0;
  border: none;
  border-top: 1px solid var(--pf-border);
}

/* ------------------------------------------------ 图注 / 表格滚动容器 */

.pfBlogProse .pfFigure {
  margin: 28px 0;
  text-align: center;
}

.pfBlogProse .pfFigure img {
  margin: 0 auto 10px;
}

.pfBlogProse .pfFigure figcaption {
  padding: 0 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--pf-text-3);
}

.pfBlogProse .pfTableWrap {
  margin: 0 0 20px;
  overflow-x: auto;
}

.pfBlogProse .pfTableWrap table {
  margin: 0;
}

/* ------------------------------------------------------------ 提示块 */

.pfCallout {
  margin: 0 0 20px;
  padding: 14px 18px;
  border: 1px solid var(--pf-border);
  border-left-width: 3px;
  border-radius: var(--pf-radius-sm);
  background: var(--pf-bg-soft);
}

.pfCalloutTitle {
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 500;
}

.pfCalloutBody > *:last-child {
  margin-bottom: 0;
}

.pfCallout--note {
  border-left-color: #165dff;
  background: #f2f6ff;
}
.pfCallout--note .pfCalloutTitle {
  color: #0e42d2;
}

.pfCallout--tip {
  border-left-color: #0e9f8f;
  background: #eefaf7;
}
.pfCallout--tip .pfCalloutTitle {
  color: #0b7d70;
}

.pfCallout--warning {
  border-left-color: #d4761f;
  background: #fff7ec;
}
.pfCallout--warning .pfCalloutTitle {
  color: #a85a12;
}

.pfCallout--danger {
  border-left-color: #d64545;
  background: #fef2f2;
}
.pfCallout--danger .pfCalloutTitle {
  color: #b02a2a;
}

@media (prefers-color-scheme: dark) {
  .pfCallout--note {
    background: #16233d;
  }
  .pfCallout--tip {
    background: #102b26;
  }
  .pfCallout--warning {
    background: #2e2415;
  }
  .pfCallout--danger {
    background: #2e1a1a;
  }
  .pfCallout--note .pfCalloutTitle {
    color: #7aa7ff;
  }
  .pfCallout--tip .pfCalloutTitle {
    color: #4fc7b4;
  }
  .pfCallout--warning .pfCalloutTitle {
    color: #e0a35a;
  }
  .pfCallout--danger .pfCalloutTitle {
    color: #e88a8a;
  }
}

/* ------------------------------------------------------------ 视频 */

.pfBlogProse .pfVideo {
  margin: 28px 0;
}

.pfBlogProse .pfVideo iframe,
.pfBlogProse .pfVideo video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--pf-border);
  border-radius: var(--pf-radius-sm);
  background: #000;
}

.pfBlogProse .pfVideo video {
  object-fit: contain;
}

/* 文章底部回到列表 */
.pfBlogBack {
  max-width: none;
  margin: 56px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--pf-border);
  font-size: 14px;
}

/* ---------------------------------------------------------------- footer */

.pfBlogFooter {
  border-top: 1px solid var(--pf-border);
  background: var(--pf-bg-soft);
}

.pfBlogFooterInner {
  max-width: var(--pf-wide);
  margin: 0 auto;
  padding: 28px 24px;
  font-size: 13px;
  color: var(--pf-text-2);
}

.pfBlogFooterLine {
  margin: 0 0 6px;
}

.pfBlogFooterLine:last-child {
  margin-bottom: 0;
}

.pfBlogFooterMuted {
  color: var(--pf-text-3);
}

.pfBlogDot {
  margin: 0 8px;
  color: var(--pf-text-3);
}

/* ------------------------------------------------------------- 响应式 */

@media (max-width: 980px) {
  .pfBlogList,
  .pfBlogList[data-count="2"] {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    max-width: none;
  }
}

@media (max-width: 720px) {
  .pfBlogHeaderInner {
    padding: 12px 16px;
    flex-wrap: wrap;
    gap: 10px;
  }

  .pfBlogBrandTagline {
    display: none;
  }

  .pfBlogNav {
    gap: 0;
    overflow-x: auto;
  }

  .pfBlogNavLink {
    padding: 6px 10px;
    font-size: 13px;
  }

  .pfBlogMain {
    padding: 28px 16px 56px;
  }

  .pfBlogHeroTitle {
    font-size: 24px;
  }

  .pfBlogArticleTitle {
    font-size: 25px;
  }

  .pfBlogProse {
    font-size: 16px;
  }

  .pfBlogProse h2 {
    font-size: 20px;
  }

  .pfBlogProse h3 {
    font-size: 18px;
  }

  .pfBlogCardBody {
    padding: 14px 16px 16px;
  }
}

@media (max-width: 640px) {
  .pfBlogList,
  .pfBlogList[data-count="1"],
  .pfBlogList[data-count="2"] {
    grid-template-columns: minmax(0, 1fr);
    max-width: none;
  }
}

/* -------------------------------------------------------------- 打印 */

@media print {
  .pfBlogHeader,
  .pfBlogFooter,
  .pfBlogSkip,
  .pfBlogBack {
    display: none;
  }

  .pfBlogMain {
    padding: 0;
  }
}