/* =========================================================
   博客主题 - 全局样式
   暗色 / 亮色主题通过 [data-theme] 切换
   ========================================================= */

:root {
  --max-w: 880px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 18px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 36px rgba(0, 0, 0, 0.12);
  --transition: 0.25s ease;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", Consolas, Monaco,
    "Courier New", monospace;
}

/* 亮色主题 */
[data-theme="light"] {
  --bg: #f7f8fb;
  --bg-card: #ffffff;
  --bg-elev: #ffffff;
  --bg-code: #f4f5f8;
  --bg-tag: #eef1f6;
  --bg-tag-hover: #e3e8f0;
  --text: #1c1f24;
  --text-soft: #5b6473;
  --text-mute: #8a93a4;
  --border: #e6e9f0;
  --accent: #5b6cff;
  --accent-soft: #eef0ff;
  --code-text: #c7254e;
  --quote-border: #d6dae4;
  --quote-bg: #fafbfd;
  /* 引用上标与参考资料 */
  --ref-mark-color: #6366f1;
  --ref-mark-bg: rgba(99, 102, 241, 0.1);
  --ref-section-bg: #f8fafc;
  --ref-section-border: #e2e8f0;
  --ref-link-color: #3b82f6;
  --ref-domain-color: #94a3b8;
  --title-decor-color: #e2e8f0;
  /* 进度条 */
  --progress-gradient: linear-gradient(90deg, #6366f1, #8b5cf6);
}

/* 暗色主题 */
[data-theme="dark"] {
  --bg: #0f1115;
  --bg-card: #181b22;
  --bg-elev: #1d212a;
  --bg-code: #11141a;
  --bg-tag: #242935;
  --bg-tag-hover: #2e3441;
  --text: #e6e8ee;
  --text-soft: #a8b0bf;
  --text-mute: #6c7689;
  --border: #262b36;
  --accent: #7c8cff;
  --accent-soft: #1e2235;
  --code-text: #ff8aa3;
  --quote-border: #2e3441;
  --quote-bg: #1a1e26;
  /* 引用上标与参考资料 */
  --ref-mark-color: #818cf8;
  --ref-mark-bg: rgba(129, 140, 248, 0.15);
  --ref-section-bg: #161a22;
  --ref-section-border: #2a2f3c;
  --ref-link-color: #60a5fa;
  --ref-domain-color: #64748b;
  --title-decor-color: #2a2f3c;
  /* 进度条 */
  --progress-gradient: linear-gradient(90deg, #818cf8, #a78bfa);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--transition), color var(--transition);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  text-decoration: underline;
}

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 14px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.3px;
  color: var(--text);
}
.brand .dot {
  color: var(--accent);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links a {
  color: var(--text-soft);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition);
}
.nav-links a:hover {
  color: var(--text);
  background: var(--bg-tag);
  text-decoration: none;
}
.nav-links a.active {
  color: var(--accent);
  background: var(--accent-soft);
}
.nav-admin-btn {
  color: var(--accent) !important;
  background: var(--accent-soft);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  transition: all var(--transition);
  text-decoration: none !important;
}
.nav-admin-btn:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  text-decoration: none !important;
}
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text-soft);
  border-radius: 8px;
  cursor: pointer;
  margin-left: 8px;
  transition: all var(--transition);
}
.theme-toggle:hover {
  color: var(--text);
  border-color: var(--accent);
}
.theme-toggle svg {
  width: 18px;
  height: 18px;
}

/* ===== 布局 ===== */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 40px 22px 60px;
}
.page-title {
  font-size: 28px;
  font-weight: 700;
  margin: 0 0 28px;
  letter-spacing: 0.3px;
}
.page-subtitle {
  color: var(--text-soft);
  margin-top: -16px;
  margin-bottom: 28px;
  font-size: 14px;
}

/* ===== 文章卡片 ===== */
.post-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: all var(--transition);
  box-shadow: var(--shadow);
}
.post-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}
.post-card h2 {
  margin: 0 0 8px;
  font-size: 20px;
  line-height: 1.4;
}
.post-card h2 a {
  color: var(--text);
}
.post-card h2 a:hover {
  color: var(--accent);
  text-decoration: none;
}
.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--text-mute);
  font-size: 13px;
  margin-bottom: 10px;
}
.post-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.post-excerpt {
  color: var(--text-soft);
  font-size: 14.5px;
  line-height: 1.7;
  margin: 6px 0 12px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tag-chip {
  display: inline-block;
  padding: 3px 10px;
  font-size: 12px;
  background: var(--bg-tag);
  color: var(--text-soft);
  border-radius: 999px;
  transition: all var(--transition);
}
.tag-chip:hover {
  background: var(--bg-tag-hover);
  color: var(--accent);
  text-decoration: none;
}

/* ===== 分页 ===== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.pagination button,
.pagination a {
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-soft);
  font-size: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.pagination button:hover:not(:disabled),
.pagination a:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}
.pagination button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.pagination .page-current {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
.pagination .page-info {
  color: var(--text-mute);
  font-size: 13px;
  margin-left: 8px;
  padding: 0 8px;
}
.pagination .ellipsis {
  color: var(--text-mute);
  padding: 0 4px;
}

/* ===== 文章详情 ===== */
.post-detail {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 40px;
  box-shadow: var(--shadow);
}
.post-detail .post-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 22px;
  margin-bottom: 28px;
}
.post-detail h1.post-title {
  font-size: 30px;
  line-height: 1.35;
  margin: 0 0 14px;
  letter-spacing: 0.3px;
}
.post-detail .post-meta {
  margin-bottom: 0;
  font-size: 13.5px;
}

/* Markdown 内容样式 */
.markdown-body {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text);
  word-wrap: break-word;
}
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  margin: 1.8em 0 0.8em;
  font-weight: 700;
  line-height: 1.4;
  scroll-margin-top: 80px;
}
.markdown-body h1 { font-size: 28px; }
.markdown-body h2 {
  font-size: 24px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.markdown-body h3 { font-size: 20px; }
.markdown-body h4 { font-size: 18px; }
.markdown-body p {
  margin: 0 0 1em;
}
.markdown-body ul,
.markdown-body ol {
  margin: 0 0 1em;
  padding-left: 1.6em;
}
.markdown-body li {
  margin: 0.3em 0;
}
.markdown-body li > ul,
.markdown-body li > ol {
  margin: 0.3em 0;
}
.markdown-body a {
  color: var(--accent);
  border-bottom: 1px solid transparent;
}
.markdown-body a:hover {
  border-bottom-color: var(--accent);
  text-decoration: none;
}
.markdown-body img {
  max-width: 100%;
  display: block;
  margin: 1.2em auto;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}
.markdown-body blockquote {
  margin: 1.2em 0;
  padding: 10px 18px;
  border-left: 4px solid var(--accent);
  background: var(--quote-bg);
  color: var(--text-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.markdown-body blockquote p:last-child {
  margin-bottom: 0;
}
.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2em 0;
  font-size: 14.5px;
  overflow: hidden;
  border-radius: var(--radius-sm);
}
.markdown-body th,
.markdown-body td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  text-align: left;
}
.markdown-body th {
  background: var(--bg-tag);
  font-weight: 600;
}
.markdown-body tr:nth-child(even) td {
  background: var(--quote-bg);
}
.markdown-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-code);
  color: var(--code-text);
  padding: 2px 6px;
  border-radius: 4px;
}
.markdown-body pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 1.2em 0;
  line-height: 1.6;
}
.markdown-body pre code {
  background: transparent;
  color: var(--text);
  padding: 0;
  font-size: 14px;
}
.markdown-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}

/* ===== 引用上标样式 ===== */
.markdown-body .ref-mark {
  display: inline-block;
  font-size: 0.75em;
  line-height: 0;
  vertical-align: super;
  margin: 0 1px;
  font-weight: 600;
}
.markdown-body .ref-mark a {
  color: var(--ref-mark-color);
  background: var(--ref-mark-bg);
  padding: 2px 5px;
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.2s ease;
  border-bottom: none !important;
  font-family: inherit;
}
.markdown-body .ref-mark a:hover {
  background: var(--ref-mark-color);
  color: #fff !important;
  border-bottom-color: transparent !important;
  transform: translateY(-1px);
}
.markdown-body .ref-mark + .ref-mark {
  margin-left: -2px;
}

/* ===== 参考资料区块 ===== */
.markdown-body .references-title {
  margin-top: 2.5em !important;
  padding-top: 1.2em !important;
  padding-bottom: 0.4em;
  border-top: 1px solid var(--title-decor-color) !important;
  border-bottom: none !important;
  font-size: 22px !important;
  position: relative;
}
.markdown-body .references-title::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 56px;
  height: 2px;
  background: var(--progress-gradient);
  border-radius: 2px;
}
.markdown-body .references-list {
  list-style: none;
  padding: 1em 1.3em !important;
  margin: 1em 0 1.5em !important;
  background: var(--ref-section-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--ref-section-border);
  counter-reset: ref-counter;
}
.markdown-body .references-list li {
  padding: 0.55em 0 0.55em 2.2em !important;
  position: relative;
  font-size: 0.92em;
  line-height: 1.6;
  border-bottom: 1px dashed var(--ref-section-border);
  margin: 0 !important;
  counter-increment: ref-counter;
}
.markdown-body .references-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.markdown-body .references-list li:first-child {
  padding-top: 0;
}
.markdown-body .references-list li::before {
  content: "[" counter(ref-counter) "]";
  position: absolute;
  left: 0;
  top: 0.55em;
  color: var(--ref-mark-color);
  font-weight: 700;
  font-size: 0.82em;
  font-variant-numeric: tabular-nums;
}
.markdown-body .references-list a {
  color: var(--ref-link-color);
  word-break: break-all;
  text-decoration: none;
  border-bottom: 1px dashed transparent !important;
  transition: border-color 0.2s;
}
.markdown-body .references-list a:hover {
  border-bottom-color: var(--ref-link-color) !important;
}
.markdown-body .ref-domain {
  color: var(--ref-domain-color);
  font-size: 0.85em;
  margin-left: 0.4em;
}
.markdown-body .ref-back-link {
  float: right;
  color: var(--text-mute) !important;
  font-size: 0.85em;
  border-bottom: none !important;
  opacity: 0.7;
  transition: all 0.2s;
}
.markdown-body .ref-back-link:hover {
  color: var(--ref-mark-color) !important;
  opacity: 1;
  border-bottom-color: transparent !important;
}

/* ===== 标题装饰线优化 ===== */
.markdown-body h1 {
  padding-bottom: 0.3em;
  position: relative;
}
.markdown-body h2 {
  padding-bottom: 0.35em;
  position: relative;
}

/* ===== 引用块美化增强 ===== */
.markdown-body blockquote {
  position: relative;
  overflow: hidden;
}
.markdown-body blockquote::before {
  content: "\201C";
  position: absolute;
  top: -8px;
  left: 12px;
  font-size: 3em;
  color: var(--accent);
  opacity: 0.15;
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1;
  font-weight: bold;
  pointer-events: none;
}

/* ===== 阅读进度条 ===== */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 1000;
  pointer-events: none;
}
.reading-progress-bar {
  height: 100%;
  width: 100%;
  background: var(--progress-gradient);
  transform-origin: left center;
  transform: scaleX(0);
  transition: transform 0.08s linear;
}
@supports (animation-timeline: scroll()) {
  .reading-progress-bar {
    animation: readingProgress linear both;
    animation-timeline: scroll(root);
    transform: none;
  }
  @keyframes readingProgress {
    from { transform: scaleX(0); }
    to { transform: scaleX(1); }
  }
}

/* highlight.js 主题覆盖（基础适配） */
.hljs {
  background: transparent;
  color: var(--text);
}
[data-theme="light"] .hljs-keyword,
[data-theme="light"] .hljs-selector-tag,
[data-theme="light"] .hljs-built_in,
[data-theme="light"] .hljs-name,
[data-theme="light"] .hljs-tag {
  color: #d73a49;
}
[data-theme="light"] .hljs-string,
[data-theme="light"] .hljs-attr,
[data-theme="light"] .hljs-template-tag,
[data-theme="light"] .hljs-template-variable {
  color: #032f62;
}
[data-theme="light"] .hljs-comment,
[data-theme="light"] .hljs-quote {
  color: #6a737d;
  font-style: italic;
}
[data-theme="light"] .hljs-number,
[data-theme="light"] .hljs-literal {
  color: #005cc5;
}
[data-theme="light"] .hljs-title,
[data-theme="light"] .hljs-section,
[data-theme="light"] .hljs-function .hljs-title {
  color: #6f42c1;
}
[data-theme="dark"] .hljs-keyword,
[data-theme="dark"] .hljs-selector-tag,
[data-theme="dark"] .hljs-built_in,
[data-theme="dark"] .hljs-name,
[data-theme="dark"] .hljs-tag {
  color: #ff7b72;
}
[data-theme="dark"] .hljs-string,
[data-theme="dark"] .hljs-attr,
[data-theme="dark"] .hljs-template-tag {
  color: #a5d6ff;
}
[data-theme="dark"] .hljs-comment,
[data-theme="dark"] .hljs-quote {
  color: #8b949e;
  font-style: italic;
}
[data-theme="dark"] .hljs-number,
[data-theme="dark"] .hljs-literal {
  color: #79c0ff;
}
[data-theme="dark"] .hljs-title,
[data-theme="dark"] .hljs-function .hljs-title {
  color: #d2a8ff;
}

/* 上下篇导航 */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 32px;
}
.post-nav a {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  color: var(--text);
  transition: all var(--transition);
}
.post-nav a:hover {
  border-color: var(--accent);
  text-decoration: none;
  transform: translateY(-2px);
}
.post-nav .nav-label {
  display: block;
  color: var(--text-mute);
  font-size: 12px;
  margin-bottom: 4px;
}
.post-nav .nav-title {
  color: var(--text);
  font-weight: 600;
  font-size: 14.5px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-nav a:hover .nav-title {
  color: var(--accent);
}
.post-nav .nav-empty {
  visibility: hidden;
}

/* 标签页 */
.tag-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
}
.tag-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  color: var(--text);
  transition: all var(--transition);
  cursor: pointer;
}
.tag-card:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.tag-card .tag-name {
  font-weight: 600;
  font-size: 15px;
}
.tag-card .tag-count {
  background: var(--bg-tag);
  color: var(--text-soft);
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
}

/* 关于页 */
.about-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 24px 0 32px;
}
.avatar {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #8b9bff);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 42px;
  font-weight: 700;
  box-shadow: var(--shadow-lg);
  margin-bottom: 18px;
}
.about-name {
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 6px;
}
.about-bio {
  color: var(--text-soft);
  max-width: 580px;
  margin: 0 auto;
  font-size: 15px;
  line-height: 1.8;
}
.about-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 30px;
  margin-top: 22px;
  box-shadow: var(--shadow);
}
.about-section h2 {
  font-size: 19px;
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.skill-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.skill-row {
  display: flex;
  align-items: center;
  gap: 14px;
}
.skill-name {
  width: 110px;
  font-size: 14px;
  color: var(--text-soft);
  font-weight: 500;
  flex-shrink: 0;
}
.skill-bar {
  flex: 1;
  height: 8px;
  background: var(--bg-tag);
  border-radius: 4px;
  overflow: hidden;
}
.skill-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #8b9bff);
  border-radius: 4px;
  transition: width 1s ease;
}
.skill-percent {
  width: 44px;
  text-align: right;
  color: var(--text-mute);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
.contact-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--bg-tag);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  transition: all var(--transition);
}
.contact-item:hover {
  background: var(--bg-tag-hover);
  text-decoration: none;
}
.contact-item svg {
  width: 18px;
  height: 18px;
  color: var(--accent);
  flex-shrink: 0;
}
.social-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--bg-tag);
  color: var(--text-soft);
  transition: all var(--transition);
}
.social-link:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
  text-decoration: none;
}
.social-link svg {
  width: 20px;
  height: 20px;
}

/* 页脚 */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 22px;
  text-align: center;
  color: var(--text-mute);
  font-size: 13px;
  background: var(--bg-card);
}
.site-footer a {
  color: var(--text-soft);
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-mute);
}
.empty-state svg {
  width: 60px;
  height: 60px;
  margin-bottom: 12px;
  opacity: 0.4;
}

/* 返回链接 */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-soft);
  font-size: 14px;
  margin-bottom: 18px;
}
.back-link:hover {
  color: var(--accent);
  text-decoration: none;
}

/* ===== 响应式 ===== */
@media (max-width: 720px) {
  .container {
    padding: 24px 16px 40px;
  }
  .nav-inner {
    padding: 12px 16px;
  }
  .brand {
    font-size: 16px;
  }
  .nav-links a {
    padding: 6px 8px;
    font-size: 13px;
  }
  .post-detail {
    padding: 24px 20px;
  }
  .post-detail h1.post-title {
    font-size: 24px;
  }
  .post-card {
    padding: 18px 18px;
  }
  .post-card h2 {
    font-size: 18px;
  }
  .post-nav {
    grid-template-columns: 1fr;
  }
  .about-section {
    padding: 20px;
  }
  .skill-name {
    width: 90px;
    font-size: 13px;
  }
  .skill-percent {
    width: 36px;
  }
  .pagination .page-info {
    width: 100%;
    text-align: center;
    margin: 4px 0 0;
  }
}

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-mute); }

/* =========================================================
   admin 后台专用样式
   ========================================================= */
.container-wide { max-width: 1100px; }

.admin-gate {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 0;
}
.gate-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 36px;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow-lg);
}
.gate-icon { font-size: 42px; text-align: center; margin-bottom: 8px; }
.gate-title { font-size: 22px; text-align: center; margin: 0 0 8px; }
.gate-sub { text-align: center; color: var(--text-soft); font-size: 14px; line-height: 1.7; margin: 0 0 24px; }
.gate-form { display: flex; flex-direction: column; gap: 14px; }
.gate-error {
  background: rgba(220, 53, 69, 0.1);
  color: #dc3545;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13.5px;
  border: 1px solid rgba(220, 53, 69, 0.2);
}
[data-theme="dark"] .gate-error { background: rgba(255, 100, 120, 0.12); color: #ff8a9c; border-color: rgba(255, 100, 120, 0.3); }
.gate-tips { margin-top: 22px; font-size: 13px; color: var(--text-soft); }
.gate-tips summary { cursor: pointer; padding: 4px 0; }
.gate-tips p { margin: 10px 0 0; line-height: 1.7; }
.gate-tips code { background: var(--bg-code); padding: 1px 6px; border-radius: 4px; font-size: 12.5px; }

/* 字段 */
.field { display: flex; flex-direction: column; gap: 6px; }
.field-label { font-size: 13px; color: var(--text-soft); font-weight: 500; }
.field-input {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  transition: all var(--transition);
  width: 100%;
}
.field-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.field-textarea { font-family: var(--font-sans); line-height: 1.7; resize: vertical; min-height: 80px; }
.field-grow { flex: 1; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  white-space: nowrap;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover:not(:disabled) {
  filter: brightness(1.05);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.btn-ghost {
  background: transparent;
  color: var(--text-soft);
  border-color: var(--border);
}
.btn-ghost:hover { color: var(--text); border-color: var(--accent); background: var(--accent-soft); }
.btn-block { width: 100%; }

/* 顶部条 */
.admin-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 12px;
}
.admin-bar-left { display: flex; align-items: center; gap: 14px; }
.admin-bar-right { display: flex; align-items: center; gap: 8px; }
.admin-title { font-size: 22px; margin: 0; }
.admin-status {
  font-size: 12.5px;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 500;
}
.admin-status-ok { background: rgba(40, 167, 69, 0.12); color: #28a745; }
.admin-status-warn { background: rgba(255, 193, 7, 0.15); color: #d4a005; }
[data-theme="dark"] .admin-status-ok { background: rgba(72, 207, 145, 0.18); color: #6cd196; }
[data-theme="dark"] .admin-status-warn { background: rgba(255, 200, 80, 0.18); color: #ffd166; }

/* 设置 */
.admin-settings {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}
.admin-settings h2 { font-size: 17px; margin: 0 0 8px; }
.admin-settings .muted { color: var(--text-soft); font-size: 13px; line-height: 1.7; margin: 0 0 16px; }
.admin-settings code { background: var(--bg-code); padding: 1px 6px; border-radius: 4px; font-size: 12.5px; }
.settings-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 14px;
}
.settings-grid .field-wide { grid-column: 1 / -1; }
.settings-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.settings-test { font-size: 13px; color: var(--text-soft); }
.settings-test-ok { color: #28a745; }
.settings-test-bad { color: #dc3545; }
[data-theme="dark"] .settings-test-ok { color: #6cd196; }
[data-theme="dark"] .settings-test-bad { color: #ff8a9c; }

/* 编辑器 */
.editor {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.editor-meta { display: flex; flex-direction: column; gap: 14px; }
.meta-row { display: grid; grid-template-columns: 160px 160px 1fr; gap: 14px; }
.editor-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.toolbar-group { display: flex; flex-wrap: wrap; gap: 4px; }
.tool {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-soft);
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  min-width: 32px;
}
.tool:hover { color: var(--text); background: var(--bg-tag); border-color: var(--border); }
.tool i { font-style: italic; }
.toolbar-info { font-size: 12.5px; color: var(--text-mute); display: flex; align-items: center; gap: 6px; }
.toolbar-info .dot { opacity: 0.5; }
.editor-content {
  min-height: 380px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.8;
}
.editor-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.editor-hint { font-size: 13px; color: var(--text-soft); }
.editor-hint code { background: var(--bg-code); padding: 1px 6px; border-radius: 4px; font-size: 12px; }
.editor-hint a { color: var(--accent); }
.actions-right { display: flex; gap: 8px; flex-wrap: wrap; }

/* 预览弹层 */
.preview-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.18s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.preview-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  max-width: 820px;
  width: 100%;
  max-height: 86vh;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}
.preview-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
}
.preview-head h2 { margin: 0; font-size: 17px; }
.preview-body {
  flex: 1;
  overflow-y: auto;
  padding: 24px 32px;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  z-index: 200;
  max-width: 90vw;
  text-align: center;
  animation: slideUp 0.22s ease;
}
@keyframes slideUp { from { opacity: 0; transform: translate(-50%, 20px); } to { opacity: 1; transform: translate(-50%, 0); } }
.toast-info  { background: var(--bg-card); color: var(--text); border: 1px solid var(--border); }
.toast-ok    { background: rgba(40, 167, 69, 0.95); color: #fff; }
.toast-error { background: rgba(220, 53, 69, 0.95); color: #fff; }
[data-theme="dark"] .toast-ok    { background: rgba(72, 207, 145, 0.95); }
[data-theme="dark"] .toast-error { background: rgba(255, 100, 120, 0.95); }

@media (max-width: 720px) {
  .settings-grid { grid-template-columns: 1fr 1fr; }
  .meta-row { grid-template-columns: 1fr; }
  .editor { padding: 18px; }
  .actions-right { width: 100%; }
  .actions-right .btn { flex: 1; }
  .toolbar-info { width: 100%; justify-content: flex-end; }
}

/* admin 入口（仅 about 页底部）— 故意做得极低调 */
.admin-entry-hint {
  text-align: center;
  margin: 32px 0 0;
  font-size: 12px;
  color: var(--text-mute);
  opacity: 0.35;
  transition: opacity var(--transition);
}
.admin-entry-hint a {
  color: inherit;
  text-decoration: none;
  letter-spacing: 0.5em;
}
.admin-entry-hint:hover { opacity: 0.9; }