:root {
  --pd-bg: #e8e8e8;
  --pd-paper: #ffffff;
  --pd-text: #1a1a1a;
  --pd-text2: #555555;
  --pd-text3: #999999;
  --pd-border: #d0d0d0;
  --pd-accent: #2b5797;
  --pd-accent-hover: #1e3f6f;
  --pd-shadow: 0 2px 12px rgba(0,0,0,0.12);
  --pd-serif: Georgia, "Noto Serif SC", "SimSun", "宋体", serif;
  --pd-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
  --pd-width: 800px;
}

* {
  box-sizing: border-box;
}

body {
  background: var(--pd-bg);
  color: var(--pd-text);
  font-family: var(--pd-serif);
  font-size: 16px;
  line-height: 1.8;
  margin: 0;
  padding: 0;
}

.pd-paper {
  max-width: var(--pd-width);
  margin: 2rem auto;
  background: var(--pd-paper);
  box-shadow: var(--pd-shadow);
  min-height: calc(100vh - 4rem);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pd-header {
  border-bottom: 1px solid var(--pd-border);
  padding: 0.75rem 2.5rem;
  position: relative;
}

.pd-header-inner {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pd-brand {
  font-family: var(--pd-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--pd-text);
  text-decoration: none;
  letter-spacing: 0.05em;
  margin-right: auto;
}

.pd-brand:hover {
  color: var(--pd-accent);
}

.pd-search {
  display: flex;
  align-items: center;
  position: relative;
}

.pd-search-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--pd-border);
  border-radius: 2px;
  background: none;
  color: var(--pd-text2);
  cursor: pointer;
  padding: 0;
  transition: all 0.2s;
}

.pd-search-btn:hover {
  color: var(--pd-accent);
  border-color: var(--pd-accent);
}

.pd-search-form {
  position: absolute;
  right: 34px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, visibility 0.25s;
  pointer-events: none;
}

.pd-search-form.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.pd-search-form input {
  width: 180px;
  height: 30px;
  border: 1px solid var(--pd-border);
  border-radius: 2px;
  padding: 0 0.6rem;
  font-size: 0.85rem;
  font-family: var(--pd-sans);
  outline: none;
  background: var(--pd-paper);
  color: var(--pd-text);
}

.pd-search-form input:focus {
  border-color: var(--pd-accent);
  box-shadow: 0 0 0 2px rgba(43,87,151,0.08);
}

.pd-menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 30px;
  height: 30px;
  padding: 5px 4px;
  border: 1px solid var(--pd-border);
  border-radius: 2px;
  background: none;
  cursor: pointer;
  transition: border-color 0.2s;
}

.pd-menu-btn:hover {
  border-color: var(--pd-accent);
}

.pd-menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--pd-text2);
  border-radius: 1px;
  transition: all 0.3s;
}

.pd-menu-btn.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.pd-menu-btn.open span:nth-child(2) {
  opacity: 0;
}

.pd-menu-btn.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.pd-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--pd-paper);
  border-bottom: 1px solid var(--pd-border);
  padding: 0.5rem 2.5rem;
  z-index: 100;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.pd-nav.open {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
}

.pd-nav-link {
  font-family: var(--pd-sans);
  font-size: 0.82rem;
  color: var(--pd-text2);
  text-decoration: none;
  padding: 0.4rem 0.75rem;
  transition: color 0.2s;
  white-space: nowrap;
}

.pd-nav-link:hover,
.pd-nav-link.active {
  color: var(--pd-accent);
}

.pd-body {
  flex: 1;
  padding: 2.5rem;
}

.pd-footer {
  border-top: 1px solid var(--pd-border);
  padding: 0.75rem 2.5rem;
  text-align: center;
  font-family: var(--pd-sans);
  font-size: 0.78rem;
  color: var(--pd-text3);
}

.pd-footer a {
  color: var(--pd-text2);
  text-decoration: none;
}

.pd-footer a:hover {
  color: var(--pd-accent);
}

.pd-footer-sep {
  margin: 0 0.5rem;
  color: var(--pd-border);
}

.pd-toc-title {
  text-align: center;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--pd-border);
}

.pd-toc-title h1 {
  font-family: var(--pd-serif);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  margin: 0 0 0.5rem;
  color: var(--pd-text);
}

.pd-toc-subtitle {
  font-size: 0.9rem;
  color: var(--pd-text3);
  margin: 0;
  font-style: italic;
}

.pd-toc-heading {
  font-family: var(--pd-serif);
  font-size: 1.1rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: 1em;
  margin-bottom: 1.5rem;
  color: var(--pd-text);
}

.pd-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: pd-toc;
}

.pd-toc-item {
  counter-increment: pd-toc;
  margin-bottom: 0;
}

.pd-toc-link {
  display: flex;
  align-items: baseline;
  padding: 0.5rem 0;
  text-decoration: none;
  color: var(--pd-text);
  transition: background 0.15s;
}

.pd-toc-link:hover {
  background: rgba(43,87,151,0.03);
  color: var(--pd-accent);
}

.pd-toc-link::before {
  content: counter(pd-toc) ".";
  font-family: var(--pd-sans);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--pd-text3);
  min-width: 2rem;
  flex-shrink: 0;
}

.pd-toc-text {
  flex-shrink: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 1rem;
}

.pd-toc-dots {
  flex: 1;
  min-width: 1.5rem;
  border-bottom: 1px dashed var(--pd-text3);
  margin: 0 0.4rem 0.25rem;
  opacity: 0.35;
}

.pd-toc-date {
  flex-shrink: 0;
  font-family: var(--pd-sans);
  font-size: 0.82rem;
  color: var(--pd-text3);
  white-space: nowrap;
}

.pd-badge {
  display: inline-block;
  font-family: var(--pd-sans);
  font-size: 0.65rem;
  font-weight: 600;
  padding: 0.05em 0.4em;
  border-radius: 2px;
  vertical-align: middle;
  margin-left: 0.3rem;
  line-height: 1.4;
}

.pd-badge-top {
  background: rgba(43,87,151,0.08);
  color: var(--pd-accent);
}

.pd-badge-private {
  background: rgba(180,40,40,0.08);
  color: #b42828;
}

.pd-empty {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--pd-text3);
  font-style: italic;
}

.pd-article-header {
  text-align: center;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--pd-border);
}

.pd-article-title {
  font-family: var(--pd-serif);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.5;
  margin: 0 0 0.75rem;
  color: var(--pd-text);
  letter-spacing: 0.03em;
}

.pd-article-meta {
  font-family: var(--pd-sans);
  font-size: 0.82rem;
  color: var(--pd-text3);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
}

.pd-article-meta a {
  color: var(--pd-accent);
  text-decoration: none;
}

.pd-article-meta a:hover {
  text-decoration: underline;
}

.pd-meta-sep {
  margin: 0 0.4rem;
  color: var(--pd-border);
}

.pd-tag-link {
  color: var(--pd-text2) !important;
}

.pd-tag-link:hover {
  color: var(--pd-accent) !important;
}

.pd-article-content {
  font-family: var(--pd-serif);
  font-size: 1rem;
  line-height: 2;
  color: var(--pd-text);
  text-align: justify;
}

.pd-article-content p {
  text-indent: 2em;
  margin-bottom: 1rem;
}

.pd-article-content h2 {
  font-family: var(--pd-serif);
  font-size: 1.35rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--pd-border);
  text-indent: 0;
}

.pd-article-content h3 {
  font-family: var(--pd-serif);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 2rem 0 0.75rem;
  text-indent: 0;
}

.pd-article-content h4 {
  font-family: var(--pd-serif);
  font-size: 1rem;
  font-weight: 700;
  margin: 1.5rem 0 0.5rem;
  text-indent: 0;
}

.pd-article-content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.5rem auto;
  border: 1px solid var(--pd-border);
  padding: 4px;
}

.pd-article-content blockquote {
  border-left: 3px solid var(--pd-accent);
  padding: 0.75rem 1.25rem;
  margin: 1.5rem 0;
  background: rgba(43,87,151,0.02);
  color: var(--pd-text2);
  text-indent: 0;
}

.pd-article-content pre {
  background: #f5f5f5;
  border: 1px solid var(--pd-border);
  border-radius: 2px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  margin: 1.5rem 0;
  text-indent: 0;
  font-family: "Courier New", Consolas, monospace;
}

.pd-article-content code {
  font-family: "Courier New", Consolas, monospace;
  background: #f0f0f0;
  padding: 0.1em 0.35em;
  border-radius: 2px;
  font-size: 0.88em;
  border: 1px solid #e0e0e0;
}

.pd-article-content pre code {
  background: none;
  border: none;
  padding: 0;
  border-radius: 0;
}

.pd-article-content a {
  color: var(--pd-accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(43,87,151,0.3);
}

.pd-article-content a:hover {
  border-bottom-color: var(--pd-accent);
}

.pd-article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
  text-indent: 0;
}

.pd-article-content table th,
.pd-article-content table td {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--pd-border);
}

.pd-article-content table th {
  background: #f5f5f5;
  font-weight: 600;
}

.pd-article-content ul,
.pd-article-content ol {
  padding-left: 2em;
  margin-bottom: 1rem;
  text-indent: 0;
}

.pd-article-content li {
  text-indent: 0;
}

.pd-nav-pages {
  display: flex;
  gap: 1.5rem;
  margin: 2.5rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--pd-border);
}

.pd-nav-page {
  flex: 1;
  min-width: 0;
}

.pd-nav-label {
  display: block;
  font-family: var(--pd-sans);
  font-size: 0.75rem;
  color: var(--pd-text3);
  margin-bottom: 0.25rem;
}

.pd-nav-page a {
  color: var(--pd-text);
  text-decoration: none;
  font-size: 0.9rem;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pd-nav-page a:hover {
  color: var(--pd-accent);
}

.pd-nav-page-next {
  text-align: right;
}

.pd-comments {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 2px solid var(--pd-border);
}

.comments-title {
  font-family: var(--pd-serif);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.respond-form {
  background: #fafafa;
  border: 1px solid var(--pd-border);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.respond-title {
  font-family: var(--pd-serif);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.respond-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.respond-group {
  margin-bottom: 0.75rem;
}

.respond-label {
  display: block;
  font-family: var(--pd-sans);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--pd-text2);
  margin-bottom: 0.35rem;
}

#comment input[type="text"],
#comment textarea {
  width: 100%;
  border: 1px solid var(--pd-border);
  border-radius: 2px;
  padding: 0.5rem 0.65rem;
  font-size: 0.9rem;
  font-family: var(--pd-sans);
  color: var(--pd-text);
  background: var(--pd-paper);
  outline: none;
  transition: border-color 0.2s;
}

#comment input[type="text"]:focus,
#comment textarea:focus {
  border-color: var(--pd-accent);
  box-shadow: 0 0 0 2px rgba(43,87,151,0.08);
}

#comment textarea {
  display: block;
  resize: vertical;
  min-height: 100px;
}

.comment-submit {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

#comment .btn {
  background: var(--pd-accent);
  color: #fff;
  border: none;
  border-radius: 2px;
  padding: 0.45rem 1.25rem;
  font-size: 0.88rem;
  font-family: var(--pd-sans);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

#comment .btn:hover {
  background: var(--pd-accent-hover);
}

.pd-vcode-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.vcode-img {
  height: 34px;
  border-radius: 2px;
  border: 1px solid var(--pd-border);
  cursor: pointer;
  vertical-align: middle;
  flex-shrink: 0;
}

.vcode-input {
  width: 80px;
  padding: 0.45rem 0.65rem;
  font-size: 0.88rem;
  border: 1px solid var(--pd-border);
  border-radius: 2px;
  outline: none;
  font-family: var(--pd-sans);
}

.vcode-input:focus {
  border-color: var(--pd-accent);
}

.comment-list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
}

.comment-list .comment-list {
  margin-left: 1.5rem;
  padding-left: 1rem;
  border-left: 2px solid var(--pd-border);
}

.comment-box {
  padding: 1rem 0;
  border-bottom: 1px dashed var(--pd-border);
}

.comment-list > li:first-child > .comment-box {
  padding-top: 0;
}

.comment-list > li:last-child > .comment-box {
  border-bottom: none;
}

.comment-title {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
  font-size: 0.82rem;
  color: var(--pd-text3);
  font-family: var(--pd-sans);
}

.comment-user {
  font-weight: 600;
  color: var(--pd-text);
}

.comment-admin > .comment-title .comment-user {
  color: var(--pd-accent);
  background: rgba(43,87,151,0.06);
  padding: 0.05em 0.5em;
  border-radius: 2px;
}

.comment-reply {
  color: var(--pd-accent);
  cursor: pointer;
  font-weight: 500;
  transition: opacity 0.2s;
}

.comment-reply:hover {
  opacity: 0.7;
}

.comment-time {
  color: var(--pd-text3);
}

.comment-content {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--pd-text);
  padding: 0.25rem 0 0 0.5rem;
  border-left: 2px solid var(--pd-border);
  margin-top: 0.25rem;
}

.comment-content p {
  margin-bottom: 0.25rem;
}

.paging {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  align-items: center;
  padding: 1.5rem 0 0.5rem;
  font-size: 0.85rem;
  font-family: var(--pd-sans);
}

.paging a,
.paging span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 30px;
  height: 30px;
  padding: 0 0.45rem;
  border: 1px solid var(--pd-border);
  border-radius: 2px;
  font-size: 0.82rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--pd-text2);
  background: var(--pd-paper);
  transition: all 0.2s;
}

.paging a:hover {
  border-color: var(--pd-accent);
  color: var(--pd-accent);
}

.paging .paging-active {
  background: var(--pd-accent);
  color: #fff;
  border-color: var(--pd-accent);
  pointer-events: none;
}

.paging .paging-disabled {
  opacity: 0.4;
  pointer-events: none;
}

.paging .paging-ell {
  border: none;
  background: none;
  min-width: auto;
  padding: 0;
}

.pd-prompt {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--pd-text2);
}

.pd-prompt-title {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--pd-text);
}

.pd-prompt a {
  color: var(--pd-accent);
  text-decoration: none;
}

.pd-prompt a:hover {
  text-decoration: underline;
}

.alert{position:fixed;top:0;left:0;z-index:99990;width:100%;height:100%;display:flex;align-items:center}
.alert-box{width:300px;background:#fff;position:relative;margin:auto;inset:0;box-shadow:rgba(0,0,0,0.13) 4px 4px 10px;border-radius:8px}
.alert-bg{width:100%;height:100%;margin:0 auto;background:#000;opacity:0.15;top:0;left:0;position:fixed}
.alert-content{font-size:16px;position:relative;padding:20px}
.alert-footer{width:100%;border-top:1px solid #f3f3f3;padding:10px;text-align:right}
.alert-footer > div{padding:0 10px;height:25px;line-height:25px;cursor:pointer;display:inline-block}
.alert-cancel{color:#888}
.alert-cancel:hover{color:#768fe7}
.alert-confirm{background:#948cd1;color:#fff;border-radius:8px}
.alert-confirm:hover{background:#677ecf;color:#fff}

.pop{color:#dfdfdf;position:fixed;width:250px;height:fit-content;margin:auto;display:inline-block;inset:0;z-index:999999;padding:10px 0;background:rgba(66,66,66,0.85);text-align:center}
.pop-title{padding:10px 20px;display:inline-block;font-size:15px}

.popup{display:none;position:fixed;top:0;left:0;width:100%;height:100%;z-index:9998;animation:.6s upIn}
.popup-bg{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.5);z-index:9998}
.popup-main{width:980px;height:510px;position:fixed;margin:auto;top:0;left:0;right:0;bottom:0;padding:32px;background:#fff;border-radius:7px;text-align:center;z-index:9999;overflow:hidden}
.popup-title{font-size:20px;margin-bottom:30px;text-align:left}
.popup-close{position:absolute;right:10px;top:5px;padding:20px;font-size:26px;color:#a2a2a2;cursor:pointer}
.popup-close:hover{color:#858585}
.popup-content{text-align:left;overflow-y:auto;height:calc(100% - 64px)}

.prompt{background:rgba(0,0,0,0.16);position:fixed;z-index:99920;top:0;left:0;width:100%;height:100%}
.prompt-box{text-align:center;font-size:16px;background:#fff;position:fixed;z-index:99921;top:0;left:0;width:100%;padding:25px;border-top:2px solid #959595;animation-name:prompt;animation-duration:1s}
.prompt-close{font-size:40px;color:#b9b9b9;float:right;cursor:pointer;position:absolute;top:0;right:20px;-webkit-tap-highlight-color:rgba(255,255,255,0);user-select:none}
.prompt-close:hover{color:#768fe7}
.prompt-title{color:#768fe7;display:inline-block}
.prompt-content{color:#5d5d5d;display:inline-block;margin-bottom:5px}
.prompt-footer span{color:#939393;display:inline-block;cursor:pointer;font-weight:normal;font-size:15px;margin:10px 10px 0}
.prompt-footer span:hover{color:#768fe7}
.prompt-text{text-align:center;padding:40px 20px;margin:50px;border:1px dashed #b9b9b9;flex:1 1 0%;height:min-content}

@keyframes prompt{0%{margin-top:-100px;opacity:0}100%{margin-top:0;opacity:1}}
@keyframes upIn{0%{opacity:0;transform:translate3d(0,-10%,0)}100%{opacity:1;transform:translate3d(0,0,0)}}

@media (max-width: 860px) {
  .pd-paper {
    margin: 0;
    box-shadow: none;
    min-height: 100vh;
  }

  .pd-header {
    padding: 0.75rem 1.25rem;
  }

  .pd-nav {
    padding: 0.5rem 1.25rem;
  }

  .pd-body {
    padding: 1.5rem 1.25rem;
  }

  .pd-footer {
    padding: 0.75rem 1.25rem;
  }

  .pd-toc-title h1 {
    font-size: 1.3rem;
  }

  .pd-article-title {
    font-size: 1.3rem;
  }

  .respond-grid {
    grid-template-columns: 1fr;
  }

  .pd-nav-pages {
    flex-direction: column;
  }

  .pd-nav-page-next {
    text-align: left;
  }

  .pd-toc-link {
    flex-wrap: wrap;
  }

  .pd-toc-dots {
    display: none;
  }

  .pd-toc-date {
    margin-left: 2rem;
    font-size: 0.78rem;
  }

  .pd-vcode-row {
    flex-wrap: wrap;
  }

  .pd-search-form input {
    width: 140px;
  }
}