/* ═══════════════════════════════════════════════
   OpenClaw Tech v2 — main.css
   白色背景 · 黑色文字 · 简洁专业
═══════════════════════════════════════════════ */

/* ── 变量 ── */
:root {
  --c-bg:        #ffffff;
  --c-bg2:       #f7f7f7;
  --c-bg3:       #efefef;
  --c-text:      #1a1a1a;
  --c-text2:     #555555;
  --c-text3:     #888888;
  --c-accent:    #e85d26;       /* 橙红色主色调，呼应"龙虾" */
  --c-accent-h:  #c9481a;
  --c-border:    #e0e0e0;
  --c-code-bg:   #f4f4f4;

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

  --radius:      8px;
  --radius-lg:   12px;
  --shadow:      0 2px 12px rgba(0,0,0,.08);
  --shadow-lg:   0 8px 32px rgba(0,0,0,.12);
  --header-h:    64px;
  --container:   1280px;      /* 与 Halo 保持一致：max-w-7xl = 1280px */
  --sidebar-w:   300px;       /* 侧边栏宽度 */
  --gap-main:    40px;        /* 主内容与侧边栏间距 */
  --trans:       .2s ease;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { background: var(--c-bg); color: var(--c-text); font-family: var(--font-sans); font-size: 16px; line-height: 1.85; }
a { color: inherit; text-decoration: none; }
img, video { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ── 工具 ── */
.oct-container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
@media (min-width: 1024px) {
  .oct-container { padding: 0 24px; }  /* lg:px-6 = 24px */
}
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ── 按钮 ── */
.oct-btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 11px 28px; border-radius: var(--radius); font-size: 15px; font-weight: 600;
  transition: all var(--trans); white-space: nowrap;
}
.oct-btn-primary  { background: var(--c-accent); color: #fff; }
.oct-btn-primary:hover { background: var(--c-accent-h); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(232,93,38,.3); }
.oct-btn-outline  { border: 2px solid var(--c-border); color: var(--c-text); }
.oct-btn-outline:hover { border-color: var(--c-accent); color: var(--c-accent); }

/* ══════════════════════════════════════════════
   HEADER
══════════════════════════════════════════════ */
.oct-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.95); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--c-border);
  height: var(--header-h);
}
.oct-header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
}

/* Logo */
.oct-logo { display: flex; align-items: center; gap: 10px; }
.oct-logo-text { font-size: 18px; font-weight: 700; color: var(--c-text); }
.oct-logo img { height: 36px; width: auto; }

/* 桌面导航 */
.oct-nav { display: flex; align-items: center; gap: 8px; }
.oct-menu { display: flex; align-items: center; gap: 6px; list-style: none; margin: 0; padding: 0; }
.oct-menu-item,
.oct-menu > li { position: relative; }
.oct-menu-item > a,
.oct-menu > li > a {
  display: flex; align-items: center; gap: 4px;
  padding: 8px 16px; border-radius: var(--radius);
  font-size: 14px; font-weight: 500; color: var(--c-text2);
  transition: all var(--trans); white-space: nowrap;
}
.oct-menu-item > a:hover,
.oct-menu > li > a:hover,
.oct-menu-item.current-menu-item > a { color: var(--c-accent); background: #fff5f2; }
.oct-arrow { transition: transform var(--trans); flex-shrink: 0; }
.oct-menu-item:hover .oct-arrow { transform: rotate(180deg); }

/* 下拉子菜单 */
.oct-submenu,
.oct-menu > li > .sub-menu {
  position: absolute; top: calc(100% + 6px); left: 0;
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); min-width: 160px; padding: 6px;
  opacity: 0; pointer-events: none; transform: translateY(-6px);
  transition: all var(--trans); z-index: 200;
  list-style: none; margin: 0;
}
.oct-menu-item:hover .oct-submenu,
.oct-menu > li:hover > .sub-menu { opacity: 1; pointer-events: auto; transform: translateY(0); }
.oct-submenu li a,
.oct-menu > li > .sub-menu li a {
  display: block; padding: 8px 14px; border-radius: 6px;
  font-size: 14px; color: var(--c-text2); transition: all var(--trans);
}
.oct-submenu li a:hover,
.oct-menu > li > .sub-menu li a:hover { background: var(--c-bg2); color: var(--c-accent); }

/* 搜索按钮 */
.oct-search-btn {
  display: flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: var(--radius);
  color: var(--c-text2); margin-left: 8px;
  transition: all var(--trans);
}
.oct-search-btn:hover { background: var(--c-bg2); color: var(--c-accent); }

/* 汉堡（手机） */
.oct-hamburger {
  display: none; flex-direction: column; justify-content: center;
  gap: 5px; width: 40px; height: 40px; padding: 6px;
}
.oct-hamburger span {
  display: block; height: 2px; background: var(--c-text);
  border-radius: 2px; transition: all var(--trans);
}
.oct-hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.oct-hamburger.is-open span:nth-child(2) { opacity: 0; }
.oct-hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 抽屉遮罩 */
.oct-drawer-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.4);
  z-index: 149; opacity: 0; pointer-events: none; transition: opacity var(--trans);
}
.oct-drawer-overlay.is-open { opacity: 1; pointer-events: auto; }

/* 抽屉 */
.oct-drawer {
  display: none;
  position: fixed; top: 0; right: 0; bottom: 0; width: 280px;
  background: #fff; z-index: 150; box-shadow: var(--shadow-lg);
  overflow-y: auto;
}
.oct-drawer.is-open { display: block; }
.oct-drawer-inner { padding: 20px; }
.oct-drawer-close {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: var(--radius);
  font-size: 18px; color: var(--c-text2); margin-bottom: 16px;
  transition: all var(--trans);
}
.oct-drawer-close:hover { background: var(--c-bg2); }
.oct-drawer-menu { display: flex; flex-direction: column; gap: 2px; }
.oct-drawer-menu li a {
  display: block; padding: 10px 14px; border-radius: var(--radius);
  font-size: 15px; color: var(--c-text); transition: all var(--trans);
}
.oct-drawer-menu li a:hover { background: var(--c-bg2); color: var(--c-accent); }
.oct-drawer-menu .sub-menu { padding-left: 16px; }

/* ══════════════════════════════════════════════
   搜索弹窗
══════════════════════════════════════════════ */
.oct-search-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.5);
  z-index: 199; opacity: 0; pointer-events: none; transition: opacity var(--trans);
}
.oct-search-overlay.is-open { opacity: 1; pointer-events: auto; }
.oct-search-modal {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  background: #fff; padding: 24px; box-shadow: var(--shadow-lg);
  transform: translateY(-100%); transition: transform .25s ease;
}
.oct-search-modal.is-open { transform: translateY(0); }
.oct-search-modal-inner {
  max-width: 640px; margin: 0 auto;
  display: flex; align-items: center; gap: 12px;
}
.oct-search-modal input[type=search] {
  flex: 1; padding: 12px 16px; border: 2px solid var(--c-border);
  border-radius: var(--radius); font-size: 16px; outline: none;
  font-family: var(--font-sans); transition: border-color var(--trans);
}
.oct-search-modal input[type=search]:focus { border-color: var(--c-accent); }
.oct-search-modal button[type=submit] {
  padding: 12px 24px; background: var(--c-accent); color: #fff;
  border-radius: var(--radius); font-size: 15px; font-weight: 600;
  transition: background var(--trans);
}
.oct-search-modal button[type=submit]:hover { background: var(--c-accent-h); }
.oct-search-close {
  width: 40px; height: 40px; border-radius: var(--radius);
  font-size: 18px; color: var(--c-text3); transition: all var(--trans);
  display: flex; align-items: center; justify-content: center;
}
.oct-search-close:hover { background: var(--c-bg2); color: var(--c-text); }

/* ══════════════════════════════════════════════
   HERO
══════════════════════════════════════════════ */
.oct-hero {
  padding: 24px 0 20px;
  background: var(--c-bg);
  text-align: center;
  position: relative;
}
.oct-hero::after {
  content: '';
  display: block;
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--c-border) 20%, var(--c-border) 80%, transparent);
}
.oct-hero-title {
  font-size: clamp(32px, 5vw, 56px); font-weight: 800;
  color: var(--c-text); line-height: 1.2; margin-bottom: 20px;
  letter-spacing: -.02em;
}
.oct-hero-title span { color: var(--c-accent); }
.oct-hero-sub {
  font-size: clamp(13px, 1.6vw, 15px); color: var(--c-text2);
  max-width: 560px; margin: 6px auto 0; line-height: 1.85;
}
.oct-hero-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ══════════════════════════════════════════════
   文章卡片列表
══════════════════════════════════════════════ */
.oct-posts-section { padding: 64px 0; }
.oct-section-title {
  font-size: 24px; font-weight: 700; margin-bottom: 32px;
  padding-bottom: 16px; border-bottom: 2px solid var(--c-border);
}
.oct-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;                    /* 卡片网格间距 */
}

/* 卡片包装 */
.oct-card-wrap { position: relative; }

/* 卡片 */
.oct-card {
  background: #fff; border: 1px solid var(--c-border);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: all var(--trans);
  display: flex; flex-direction: column;
}
.oct-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); border-color: transparent; }
.oct-card-img-link { display: block; overflow: hidden; aspect-ratio: 2/1; }
.oct-card-img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.oct-card:hover .oct-card-img { transform: scale(1.03); }
.oct-card-placeholder {
  width: 100%; height: 100%;
  background: linear-gradient(135deg, #fde8dc 0%, #fcc6ae 100%);
  display: flex; align-items: center; justify-content: center;
}
.oct-card-placeholder span { font-size: 32px; font-weight: 700; color: var(--c-accent); opacity: .6; }
.oct-card-body { padding: 12px 16px; flex: 1; display: flex; flex-direction: column; gap: 6px; }
.oct-card-cat {
  display: inline-block; font-size: 11px; font-weight: 600; letter-spacing: .04em;
  color: var(--c-accent); background: #fff5f2; padding: 2px 8px; border-radius: 20px;
  text-transform: uppercase; width: fit-content;
}
.oct-card-title { font-size: 15px; font-weight: 700; line-height: 1.4; flex: 1; }
.oct-card-title a:hover { color: var(--c-accent); }
.oct-card-excerpt { display: none; }
.oct-card-meta { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--c-text3); margin-top: auto; }
.oct-card-read::before { content: "·"; margin-right: 6px; }

/* 分页 — 现代风格 */
.oct-pagination {
  display: flex; justify-content: center; align-items: center;
  gap: 6px; margin-top: 56px; flex-wrap: wrap;
}
.oct-pagination a, .oct-pagination span {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 40px; height: 40px; padding: 0 14px;
  border-radius: 10px; font-size: 14px; font-weight: 600;
  transition: all var(--trans); cursor: pointer;
}
.oct-pagination a {
  background: var(--c-bg2); color: var(--c-text2);
  border: 1px solid transparent;
}
.oct-pagination a:hover {
  background: #fff5f2; color: var(--c-accent);
  border-color: var(--c-accent); transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(232,93,38,.15);
}
.oct-pagination .current {
  background: linear-gradient(135deg, var(--c-accent) 0%, #f07a4a 100%);
  color: #fff; border: none;
  box-shadow: 0 4px 16px rgba(232,93,38,.35);
  transform: scale(1.05);
}
.oct-pagination .next, .oct-pagination .prev {
  padding: 0 20px; gap: 6px;
  background: #fff; border: 1px solid var(--c-border);
}
.oct-pagination .next:hover, .oct-pagination .prev:hover {
  background: var(--c-accent); color: #fff;
  border-color: var(--c-accent);
}
.oct-no-posts { text-align: center; color: var(--c-text2); padding: 40px 0; }

/* ══════════════════════════════════════════════
   文章详情页
══════════════════════════════════════════════ */
.oct-single { padding-bottom: 80px; }

/* 面包屑 */
.oct-breadcrumb {
  padding: 16px 0; font-size: 13px; color: var(--c-text3);
  max-width: var(--container); margin: 0 auto; padding-left: 24px; padding-right: 24px;
}
.oct-breadcrumb a { color: var(--c-text3); transition: color var(--trans); }
.oct-breadcrumb a:hover { color: var(--c-accent); }
.oct-breadcrumb span { margin: 0 6px; }

/* 文章头部 — 与 Halo prose 宽度一致 */
.oct-single-header { padding-top: 32px; padding-bottom: 40px; max-width: 65ch; }  /* 65ch ≈ 910px，与 Halo prose 一致 */
.oct-single-cat {
  display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: .04em;
  color: var(--c-accent); background: #fff5f2; padding: 4px 12px;
  border-radius: 20px; margin-bottom: 16px; text-transform: uppercase;
}
.oct-single-title { font-size: clamp(24px, 4vw, 40px); font-weight: 800; line-height: 1.25; margin-bottom: 16px; }
.oct-single-meta { display: flex; gap: 12px; font-size: 14px; color: var(--c-text3); margin-bottom: 28px; }
.oct-single-thumb { border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 40px; }
.oct-single-thumb img { width: 100%; height: auto; }

/* TOC */
.oct-toc {
  border: 1px solid var(--c-border); border-radius: var(--radius);
  padding: 20px 24px; margin-bottom: 36px;
  background: var(--c-bg2);
}
.oct-toc-title { font-weight: 700; font-size: 15px; margin-bottom: 12px; }
.oct-toc ul { display: flex; flex-direction: column; gap: 6px; }
.oct-toc li a { font-size: 14px; color: var(--c-text2); transition: color var(--trans); }
.oct-toc li a:hover { color: var(--c-accent); }
.oct-toc .toc-h3 { padding-left: 16px; }

/* 正文 — 与 Halo prose 宽度一致 */
.oct-single-wrap { max-width: 65ch; }      /* 65ch ≈ 910px */
.oct-single-content { max-width: 65ch; }   /* 与 Halo prose 一致 */

.oct-single-content p { margin-bottom: 2em; }
.oct-single-content h2 { font-size: 24px; font-weight: 700; margin: 2em 0 .75em; padding-bottom: 8px; border-bottom: 1px solid var(--c-border); }
.oct-single-content h3 { font-size: 20px; font-weight: 700; margin: 1.8em 0 .6em; }
.oct-single-content h4 { font-size: 17px; font-weight: 700; margin: 1.5em 0 .5em; }
.oct-single-content ul, .oct-single-content ol { margin-bottom: 1.5em; padding-left: 24px; }
.oct-single-content ul li { list-style: disc; margin-bottom: .4em; }
.oct-single-content ol li { list-style: decimal; margin-bottom: .4em; }
.oct-single-content blockquote {
  border-left: 4px solid var(--c-accent); padding: 12px 20px;
  margin: 1.5em 0; color: var(--c-text2); background: #fff5f2;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.oct-single-content a { color: var(--c-accent); text-decoration: underline; text-decoration-color: transparent; transition: text-decoration-color var(--trans); }
.oct-single-content a:hover { text-decoration-color: var(--c-accent); }
.oct-single-content img { border-radius: var(--radius); }
.oct-single-content table { width: 100%; border-collapse: collapse; margin: 1.5em 0; font-size: 14px; }
.oct-single-content th { background: var(--c-bg2); font-weight: 700; }
.oct-single-content th, .oct-single-content td { border: 1px solid var(--c-border); padding: 10px 14px; text-align: left; }

/* 代码块 */
.oct-single-content pre {
  position: relative; background: #1e1e1e; color: #d4d4d4;
  padding: 20px; border-radius: var(--radius); overflow-x: auto;
  font-family: var(--font-mono); font-size: 14px; line-height: 1.85;
  margin: 1.5em 0;
}
.oct-single-content code {
  font-family: var(--font-mono); font-size: .9em;
  background: var(--c-code-bg); padding: 2px 6px; border-radius: 4px;
  color: var(--c-accent);
}
.oct-single-content pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
/* 复制按钮 */
.oct-copy-btn {
  position: absolute; top: 10px; right: 10px;
  padding: 4px 10px; background: rgba(255,255,255,.15); color: #ccc;
  border-radius: 4px; font-size: 12px; font-family: var(--font-sans);
  transition: all var(--trans);
}
.oct-copy-btn:hover { background: rgba(255,255,255,.3); color: #fff; }
.oct-copy-btn.copied { background: #27ae60; color: #fff; }

/* 标签 */
.oct-single-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 32px 0; }
.oct-tag {
  display: inline-block; padding: 4px 12px; border: 1px solid var(--c-border);
  border-radius: 20px; font-size: 13px; color: var(--c-text2);
  transition: all var(--trans);
}
.oct-tag:hover { border-color: var(--c-accent); color: var(--c-accent); background: #fff5f2; }

/* 分享 */
.oct-share { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin: 36px 0; padding: 20px; background: var(--c-bg2); border-radius: var(--radius); }
.oct-share-label { font-size: 14px; color: var(--c-text2); font-weight: 500; }
.oct-share-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 16px; border-radius: var(--radius); font-size: 14px;
  border: 1px solid var(--c-border); color: var(--c-text2);
  transition: all var(--trans); background: #fff;
}
.oct-share-wechat:hover  { border-color: #07c160; color: #07c160; }
.oct-share-qq:hover      { border-color: #12b7f5; color: #12b7f5; }
.oct-share-weibo:hover   { border-color: #e6162d; color: #e6162d; }

/* 微信二维码弹窗 */
.oct-wechat-qr {
  position: fixed; inset: 0; z-index: 300;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,.6);
  opacity: 0; pointer-events: none; transition: opacity var(--trans);
}
.oct-wechat-qr.is-open { opacity: 1; pointer-events: auto; }
.oct-wechat-qr-inner {
  background: #fff; border-radius: var(--radius-lg); padding: 28px 32px;
  text-align: center; position: relative; box-shadow: var(--shadow-lg);
}
.oct-wechat-qr-inner p { font-size: 14px; color: var(--c-text2); margin-bottom: 16px; }
.oct-wechat-qr-inner img { border-radius: var(--radius); }
.oct-wechat-qr-close {
  position: absolute; top: 12px; right: 12px;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--c-bg2); font-size: 16px; color: var(--c-text2);
  display: flex; align-items: center; justify-content: center;
  transition: all var(--trans);
}
.oct-wechat-qr-close:hover { background: var(--c-border); }

/* 上下篇导航 */
.oct-post-nav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
  margin: 40px 0; padding: 24px 0; border-top: 1px solid var(--c-border);
}
.oct-post-nav-prev, .oct-post-nav-next { display: flex; flex-direction: column; gap: 6px; }
.oct-post-nav-next { text-align: right; }
.oct-post-nav-label { font-size: 12px; color: var(--c-text3); font-weight: 500; text-transform: uppercase; letter-spacing: .05em; }
.oct-post-nav a { font-size: 15px; font-weight: 600; color: var(--c-text); line-height: 1.4; transition: color var(--trans); }
.oct-post-nav a:hover { color: var(--c-accent); }

/* 相关阅读 */
.oct-related { margin-top: 48px; padding-top: 36px; border-top: 1px solid var(--c-border); }
.oct-related-title { font-size: 20px; font-weight: 700; margin-bottom: 20px; }
.oct-related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.oct-related-item { display: block; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--c-border); transition: all var(--trans); }
.oct-related-item:hover { box-shadow: var(--shadow); transform: translateY(-2px); border-color: transparent; }
.oct-related-item img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.oct-related-placeholder {
  width: 100%; aspect-ratio: 16/9;
  background: linear-gradient(135deg, #fde8dc 0%, #fcc6ae 100%);
  display: flex; align-items: center; justify-content: center;
}
.oct-related-placeholder span { font-size: 24px; font-weight: 700; color: var(--c-accent); opacity: .5; }
.oct-related-item p { padding: 12px 14px; font-size: 14px; font-weight: 600; line-height: 1.5; color: var(--c-text); }

/* ══════════════════════════════════════════════
   归档 / 分类 / 搜索
══════════════════════════════════════════════ */
.oct-archive-wrap, .oct-page-wrap { padding: 40px 0 80px; }
.oct-archive-header { margin-bottom: 36px; }
.oct-archive-header h1 { font-size: 28px; font-weight: 800; margin-bottom: 8px; }
.oct-archive-desc { color: var(--c-text2); font-size: 15px; }
.oct-no-posts { text-align: center; padding: 60px 0; }
.oct-no-posts p { margin-bottom: 20px; color: var(--c-text2); }

/* ══════════════════════════════════════════════
   404
══════════════════════════════════════════════ */
.oct-404-wrap { padding: 80px 0; }
.oct-404-inner { max-width: 560px; margin: 0 auto; text-align: center; }
.oct-404-code { font-size: 96px; font-weight: 900; color: var(--c-accent); line-height: 1; margin-bottom: 16px; opacity: .15; }
.oct-404-title { font-size: 28px; font-weight: 800; margin-bottom: 12px; }
.oct-404-desc { color: var(--c-text2); margin-bottom: 28px; }
.oct-404-btns { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-bottom: 40px; }
.oct-404-popular h2 { font-size: 18px; font-weight: 700; margin-bottom: 14px; }
.oct-404-popular ul { display: flex; flex-direction: column; gap: 8px; }
.oct-404-popular li a { color: var(--c-text2); font-size: 15px; transition: color var(--trans); }
.oct-404-popular li a:hover { color: var(--c-accent); }

/* ══════════════════════════════════════════════
   页脚
══════════════════════════════════════════════ */
.oct-footer {
  background: var(--c-bg2); border-top: 1px solid var(--c-border);
  padding: 32px 0;
}
.oct-footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.oct-footer-copy { font-size: 14px; color: var(--c-text3); }
.oct-footer-nav { display: flex; gap: 20px; }
.oct-footer-menu { display: flex; gap: 20px; list-style: none; margin: 0; padding: 0; flex-wrap: wrap; }
.oct-footer-menu li { margin: 0; padding: 0; }
.oct-footer-menu a { font-size: 14px; color: var(--c-text3); transition: color var(--trans); }
.oct-footer-menu a:hover { color: var(--c-accent); }
.oct-footer-nav a { font-size: 14px; color: var(--c-text3); transition: color var(--trans); }
.oct-footer-nav a:hover { color: var(--c-accent); }

/* ══════════════════════════════════════════════
   回到顶部
══════════════════════════════════════════════ */
.oct-back-top {
  position: fixed; bottom: 32px; right: 32px; z-index: 90;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--c-accent); color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(232,93,38,.35);
  opacity: 0; pointer-events: none;
  transition: all var(--trans); transform: translateY(8px);
}
.oct-back-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.oct-back-top:hover { background: var(--c-accent-h); transform: translateY(-2px); }

/* ══════════════════════════════════════════════
   静态页面 — 与 Halo prose 宽度一致
══════════════════════════════════════════════ */
.oct-page-wrap h1 { font-size: 32px; font-weight: 800; margin-bottom: 32px; }
.oct-content { max-width: 65ch; }          /* 与 Halo prose 一致 */
.oct-content p { margin-bottom: 1.5em; line-height: 1.8; }

/* ══════════════════════════════════════════════
   响应式
══════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .oct-card-grid { grid-template-columns: repeat(2, 1fr); }
  .oct-related-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --header-h: 56px; }

  /* 导航隐藏，汉堡显示 */
  .oct-nav { display: none !important; }
  .oct-hamburger { display: flex !important; flex-direction: column !important; }

  .oct-hero { padding: 14px 0 12px; }
  .oct-hero-btns { flex-direction: column; align-items: center; }
  .oct-btn { width: 100%; max-width: 280px; }

  .oct-card-grid { grid-template-columns: 1fr; gap: 20px; }
  .oct-related-grid { grid-template-columns: 1fr; }

  .oct-post-nav { grid-template-columns: 1fr; }
  .oct-post-nav-next { text-align: left; }

  .oct-footer-inner { flex-direction: column; text-align: center; }
  .oct-footer-nav { justify-content: center; }

  .oct-back-top { bottom: 20px; right: 20px; }

  .oct-single-header { padding-top: 16px; }
  .oct-share { gap: 8px; }
}

@media (max-width: 480px) {
  .oct-container { padding: 0 16px; }
  .oct-posts-section { padding: 40px 0; }
}

/* ══════════════════════════════════════════════
   左右布局（首页 & 文章页）
══════════════════════════════════════════════ */
.oct-layout {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-w);  /* 1fr + 300px */
  gap: var(--gap-main);                          /* 40px */
  align-items: start;
  padding-top: 48px;
  padding-bottom: 80px;
}
.oct-main { min-width: 0; }

/* 文章页正文不再限宽，由父格宽度控制 */
.oct-single-layout .oct-single-content { max-width: 100%; }
.oct-single-layout .oct-single-main { min-width: 0; }

/* ══════════════════════════════════════════════
   侧边栏
══════════════════════════════════════════════ */
.oct-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;                    /* widget 间距 */
  width: var(--sidebar-w);      /* 300px */
}

/* 所有侧边栏均粘性（首页 & 文章页通用） */
.oct-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 20px);
  max-height: calc(100vh - var(--header-h) - 40px);
  overflow-y: auto;
  scrollbar-width: none;
}
.oct-sidebar::-webkit-scrollbar { display: none; }

/* Widget 通用 */
.oct-widget {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 20px;
}
.oct-widget-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-border);
  letter-spacing: .03em;
  text-transform: uppercase;
}

/* 分类列表 */
.oct-widget-cat-list { display: flex; flex-direction: column; gap: 2px; }
.oct-widget-cat-list li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--c-text2);
  transition: all var(--trans);
}
.oct-widget-cat-list li a:hover,
.oct-widget-cat-list li.is-active a {
  background: #fff5f2;
  color: var(--c-accent);
}
.oct-cat-count {
  font-size: 12px;
  background: var(--c-bg2);
  color: var(--c-text3);
  padding: 2px 7px;
  border-radius: 20px;
  flex-shrink: 0;
}
.oct-widget-cat-list li.is-active .oct-cat-count {
  background: #fde8dc;
  color: var(--c-accent);
}

/* 最新文章列表 */
.oct-widget-recent-list { display: flex; flex-direction: column; }
.oct-widget-recent-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding: 9px 0;
  border-bottom: 1px solid var(--c-bg3);
}
.oct-widget-recent-list li:last-child { border-bottom: none; }
.oct-widget-recent-list li a {
  font-size: 13px;
  color: var(--c-text);
  line-height: 1.45;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--trans);
}
.oct-widget-recent-list li a:hover { color: var(--c-accent); }
.oct-widget-recent-list li time {
  font-size: 11px;
  color: var(--c-text3);
  flex-shrink: 0;
  white-space: nowrap;
}

/* 标签云 */
.oct-tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.oct-tag-cloud .oct-tag {
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid var(--c-border);
  color: var(--c-text2);
  transition: all var(--trans);
  line-height: 1.6;
}
.oct-tag-cloud .oct-tag:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: #fff5f2;
}

/* 侧边栏 TOC */
.oct-widget-toc .oct-toc-sidebar {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.oct-toc-sidebar a {
  font-size: 13px;
  color: var(--c-text2);
  padding: 4px 8px;
  border-radius: 4px;
  border-left: 2px solid transparent;
  display: block;
  transition: all var(--trans);
  line-height: 1.5;
}
.oct-toc-sidebar a:hover { color: var(--c-accent); background: #fff5f2; }
.oct-toc-sidebar a.is-active {
  color: var(--c-accent);
  border-left-color: var(--c-accent);
  background: #fff5f2;
  font-weight: 600;
}
.oct-toc-sidebar .toc-h3 { padding-left: 16px; }
.oct-toc-sidebar .toc-h4 { padding-left: 28px; }
.oct-toc-empty { font-size: 13px; color: var(--c-text3); }

/* 关于我 widget */
.oct-widget-about {
  text-align: center;
}
.oct-about-avatar {
  font-size: 40px;
  line-height: 1;
  margin-bottom: 10px;
}
.oct-about-text {
  font-size: 13px;
  color: var(--c-text2);
  line-height: 1.85;
  margin-bottom: 12px;
}
.oct-about-more {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-accent);
  transition: opacity var(--trans);
}
.oct-about-more:hover { opacity: .75; }

/* ── 响应式：侧边栏在窄屏折叠到下方 ── */
@media (max-width: 1024px) {
  .oct-layout { grid-template-columns: 1fr 260px; gap: 28px; }
}
@media (max-width: 768px) {
  .oct-layout {
    grid-template-columns: 1fr;
    padding-top: 32px;
    padding-bottom: 48px;
  }
  .oct-sidebar { position: static; max-height: none; }
  /* 手机端侧边栏只保留分类和最新文章，标签云隐藏 */
  .oct-widget-tags { display: none; }
  /* 首页卡片恢复单列 */
  .oct-layout .oct-card-grid { grid-template-columns: 1fr; }
}

/* ══════════════════════════════════════════════
   首页轮播图
══════════════════════════════════════════════ */
.oct-banner {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: var(--c-bg2);
  border-bottom: 1px solid var(--c-border);
  /* 宽高比 16:5，实际图片建议 1440×450 px */
  aspect-ratio: 16 / 5;
  /* 兼容旧 Safari：aspect-ratio 需要 display:block 才能生效 */
  display: block;
}

/* 轨道 */
.oct-banner-track {
  display: flex;
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  transition: transform .55s cubic-bezier(.4,0,.2,1);
  will-change: transform;
}

/* 单张幻灯 */
.oct-banner-slide {
  min-width: 100%;
  height: 100%;
  position: relative;
  flex-shrink: 0;
  overflow: hidden;
}
.oct-banner-link {
  display: block;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0; left: 0;
}
.oct-banner-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  position: absolute;
  top: 0; left: 0;
  transition: transform .6s ease;
}
.oct-banner-slide.is-active .oct-banner-img {
  transform: scale(1.015); /* 轻微 Ken Burns 效果 */
}

/* 文字叠加层 */
.oct-banner-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 32px 40px 28px;
  background: linear-gradient(to top, rgba(0,0,0,.55) 0%, transparent 100%);
  color: #fff;
}
.oct-banner-caption-title {
  font-size: clamp(18px, 2.5vw, 28px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 6px;
  text-shadow: 0 1px 6px rgba(0,0,0,.4);
}
.oct-banner-caption-sub {
  font-size: clamp(13px, 1.4vw, 15px);
  opacity: .88;
  text-shadow: 0 1px 4px rgba(0,0,0,.3);
}

/* 左右箭头 */
.oct-banner-arrow {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  width: 40px; height: 40px;
  background: rgba(255,255,255,.18);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 50%;
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: background var(--trans), opacity var(--trans);
  z-index: 10;
  opacity: 0;
}
.oct-banner:hover .oct-banner-arrow { opacity: 1; }
.oct-banner-prev { left: 16px; }
.oct-banner-next { right: 16px; }
.oct-banner-arrow:hover { background: rgba(255,255,255,.35); }

/* 指示点 */
.oct-banner-dots {
  position: absolute;
  bottom: 14px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 8px;
  z-index: 10;
}
.oct-banner-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,.5);
  border: none;
  cursor: pointer;
  transition: background var(--trans), transform var(--trans);
  padding: 0;
}
.oct-banner-dot.is-active {
  background: #fff;
  transform: scale(1.35);
}

/* 手机端 */
@media (max-width: 768px) {
  .oct-banner { aspect-ratio: 16 / 9; }
  .oct-banner-track { height: 100%; }
  .oct-banner-slide { height: 100%; }
  .oct-banner-caption { padding: 20px 16px 16px; }
  .oct-banner-arrow { display: none; }
}

/* ═══════════════════════════════════════════════
   【方案 C 完整优化】排版增强 - 2026-03-18
═══════════════════════════════════════════════ */

/* P0: 列表项间距优化 */
.oct-single-content ul li,
.oct-single-content ol li {
  margin-bottom: 0.6em;
}

/* P1: h2 标题增强 - 左边框 */
.oct-single-content h2 {
  padding-left: 12px;
  border-left: 4px solid var(--c-accent);
  border-bottom: none;
}

/* P1: 列表容器美化 */
.oct-single-content ul,
.oct-single-content ol {
  background: var(--c-bg2);
  padding: 16px 24px;
  border-radius: var(--radius);
}

.oct-single-content ul {
  padding-left: 40px;
}

.oct-single-content ol {
  padding-left: 42px;
}

/* P1: 表格斑马纹 */
.oct-single-content tbody tr:nth-child(odd) {
  background: #f9f9f9;
}

/* P2: 链接美化 */
.oct-single-content a {
  background: rgba(232, 93, 38, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  text-decoration: none;
}

.oct-single-content a:hover {
  background: rgba(232, 93, 38, 0.15);
  text-decoration: underline;
}

/* P2: 首段强调 */
.oct-single-content > p:first-of-type {
  font-size: 1.08em;
  line-height: 1.9;
  font-weight: 500;
}

/* P3: 提示框 - 信息 */
.highlight-info,
.highlight-tip {
  background: #fef3e2;
  border-left: 4px solid #f39c12;
  padding: 12px 16px;
  border-radius: 0 6px 6px 0;
  margin: 1.5em 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-text);
}

.highlight-info strong,
.highlight-tip strong {
  color: #d68910;
  font-weight: 700;
}

/* P3: 提示框 - 警告 */
.highlight-warning {
  background: #fee;
  border-left: 4px solid #e74c3c;
  padding: 12px 16px;
  border-radius: 0 6px 6px 0;
  margin: 1.5em 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-text);
}

.highlight-warning strong {
  color: #c0392b;
  font-weight: 700;
}

/* P3: 提示框 - 成功 */
.highlight-success {
  background: #efe;
  border-left: 4px solid #27ae60;
  padding: 12px 16px;
  border-radius: 0 6px 6px 0;
  margin: 1.5em 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-text);
}

.highlight-success strong {
  color: #1e8449;
  font-weight: 700;
}

/* P3: 提示框 - 重点 */
.highlight-important {
  background: #f0f0f0;
  border-left: 4px solid var(--c-accent);
  padding: 12px 16px;
  border-radius: 0 6px 6px 0;
  margin: 1.5em 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-text);
  font-weight: 500;
}

/* P4: 引用块增强 */
.oct-single-content blockquote {
  border-left: 4px solid var(--c-accent);
  padding: 12px 20px;
  margin: 1.5em 0;
  color: var(--c-text2);
  background: #fff5f2;
  border-radius: 0 6px 6px 0;
  font-style: italic;
}

.oct-single-content blockquote p:last-child {
  margin-bottom: 0;
}

/* P4: 图片悬停效果 */
.oct-single-content img {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.oct-single-content img:hover {
  transform: scale(1.02);
  box-shadow: 0 8px 32px rgba(0,0,0,.12);
}

/* P4: 标签美化 */
.oct-tag {
  background: transparent;
}

.oct-tag:hover {
  background: #fff5f2;
}

/* ═══════════════════════════════════════════════
   手机端侧边栏修复 - 2026-03-30
   修复手机端侧边栏显示太小的问题
═══════════════════════════════════════════════ */

@media (max-width: 768px) {
  /* 侧边栏容器优化 */
  .oct-sidebar {
    width: 100% !important;
    max-width: 100% !important;
    margin-top: 40px;
    padding: 0 16px;
  }
  
  /* 侧边栏小部件优化 */
  .oct-widget {
    width: 100% !important;
    max-width: 100% !important;
    margin-bottom: 24px;
    padding: 20px;
    background: var(--c-bg2);
    border-radius: var(--radius);
  }
  
  /* 小部件标题 */
  .oct-widget-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--c-accent);
  }
  
  /* 分类列表 */
  .oct-widget-cat-list li a {
    padding: 12px 0;
    font-size: 15px;
  }
  
  /* 最新文章列表 */
  .oct-widget-recent-list li {
    padding: 14px 0;
  }
  
  .oct-widget-recent-list li a {
    font-size: 15px;
    line-height: 1.5;
  }
  
  /* 关于我小部件 */
  .oct-widget-about {
    text-align: center;
    padding: 24px 20px;
  }
  
  .oct-about-avatar {
    font-size: 48px;
    margin-bottom: 12px;
  }
  
  .oct-about-text {
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 16px;
  }
  
  /* 标签云 - 手机端显示 */
  .oct-widget-tags {
    display: block !important;
  }
  
  .oct-tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
  }
  
  .oct-tag-cloud .oct-tag {
    padding: 8px 14px;
    background: var(--c-bg);
    border-radius: 20px;
    font-size: 14px !important;
    border: 1px solid var(--c-border);
  }
}

/* 更小屏幕的优化 */
@media (max-width: 480px) {
  .oct-sidebar {
    padding: 0 12px;
  }
  
  .oct-widget {
    padding: 16px;
  }
  
  .oct-widget-title {
    font-size: 17px;
  }
}

/* ═══════════════════════════════════════════════
   面包屑导航样式
═══════════════════════════════════════════════ */
.oct-breadcrumb {
  padding: 12px 0;
  font-size: 14px;
  color: var(--c-text3);
  border-bottom: 1px solid var(--c-border);
  margin-bottom: 20px;
}

.oct-breadcrumb a {
  color: var(--c-text2);
  transition: color var(--trans);
}

.oct-breadcrumb a:hover {
  color: var(--c-accent);
}

.oct-breadcrumb span {
  margin: 0 8px;
  color: var(--c-text3);
}

.oct-breadcrumb span:last-child {
  color: var(--c-text);
  font-weight: 500;
}

/* 手机端面包屑优化 */
@media (max-width: 768px) {
  .oct-breadcrumb {
    font-size: 13px;
    padding: 10px 16px;
    margin-bottom: 16px;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  
  .oct-breadcrumb::-webkit-scrollbar {
    display: none;
  }
}

/* ═══════════════════════════════════════════════
   代码块复制按钮
═══════════════════════════════════════════════ */
.oct-copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  background: rgba(255,255,255,0.9);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  font-size: 12px;
  color: var(--c-text2);
  cursor: pointer;
  opacity: 0;
  transition: all var(--trans);
  z-index: 10;
}

pre:hover .oct-copy-btn {
  opacity: 1;
}

.oct-copy-btn:hover {
  background: var(--c-accent);
  color: #fff;
  border-color: var(--c-accent);
}

.oct-copy-btn svg {
  width: 14px;
  height: 14px;
}

.oct-copy-btn.copied {
  background: #22c55e;
  border-color: #22c55e;
  color: #fff;
}

/* 手机端始终显示复制按钮 */
@media (max-width: 768px) {
  .oct-copy-btn {
    opacity: 1;
    padding: 4px 8px;
    font-size: 11px;
  }
  
  .oct-copy-btn span {
    display: none;
  }
}

/* ═══════════════════════════════════════════════
   暗黑模式
═══════════════════════════════════════════════ */

/* 暗黑模式变量 */
[data-theme="dark"] {
  --c-bg:        #0d1117;
  --c-bg2:       #161b22;
  --c-bg3:       #21262d;
  --c-text:      #c9d1d9;
  --c-text2:     #8b949e;
  --c-text3:     #6e7681;
  --c-border:    #30363d;
  --c-code-bg:   #1c2128;
}

/* 暗黑模式切换按钮 */
.oct-theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--trans);
  color: var(--c-text2);
}

.oct-theme-toggle:hover {
  background: var(--c-bg2);
  color: var(--c-accent);
  border-color: var(--c-accent);
}

.oct-theme-toggle svg {
  width: 18px;
  height: 18px;
}

.oct-theme-toggle .sun-icon {
  display: none;
}

[data-theme="dark"] .oct-theme-toggle .moon-icon {
  display: none;
}

[data-theme="dark"] .oct-theme-toggle .sun-icon {
  display: block;
}

/* 暗黑模式下的代码块 */
[data-theme="dark"] pre {
  background: var(--c-bg3);
}

[data-theme="dark"] code {
  background: var(--c-bg3);
  color: #e6edf3;
}

/* 暗黑模式下的复制按钮 */
[data-theme="dark"] .oct-copy-btn {
  background: rgba(13,17,23,0.9);
  border-color: var(--c-border);
  color: var(--c-text2);
}

[data-theme="dark"] .oct-copy-btn:hover {
  background: var(--c-accent);
  color: #fff;
  border-color: var(--c-accent);
}

/* 暗黑模式过渡动画 */
*, *::before, *::after {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* ═══════════════════════════════════════════════
   搜索建议
═══════════════════════════════════════════════ */
.oct-search-suggestions {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: 8px;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  max-height: 300px;
  overflow-y: auto;
  z-index: 1000;
}

.oct-suggestion-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  color: var(--c-text);
  transition: background var(--trans);
  border-bottom: 1px solid var(--c-border);
}

.oct-suggestion-item:last-child {
  border-bottom: none;
}

.oct-suggestion-item:hover,
.oct-suggestion-item.is-selected {
  background: var(--c-bg2);
  color: var(--c-accent);
}

.oct-suggestion-title {
  font-size: 14px;
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  margin-right: 12px;
}

.oct-suggestion-item svg {
  flex-shrink: 0;
  color: var(--c-text3);
}

/* 暗黑模式下的搜索建议 */
[data-theme="dark"] .oct-search-suggestions {
  background: var(--c-bg2);
  border-color: var(--c-border);
}

[data-theme="dark"] .oct-suggestion-item {
  border-color: var(--c-border);
}

[data-theme="dark"] .oct-suggestion-item:hover,
[data-theme="dark"] .oct-suggestion-item.is-selected {
  background: var(--c-bg3);
}