/* website/assets/css/style.css — 科技感主题 */
:root {
  --bg-primary: #0D1117;
  --bg-secondary: #161B22;
  --bg-card: #1A1F2E;
  --text-primary: #E6EDF3;
  --text-secondary: #8B949E;
  --accent-cyan: #00D4FF;
  --accent-purple: #7B2CBF;
  --accent-green: #00FF88;
  --border-color: #30363D;
  --avatar-color: #00D4FF; /* 深色主题作者头像色（亮青，暗底醒目） */
  --avatar-admin: #B39DDB; /* 深色主题管理员头像色（浅紫，与普通用户青色区分） */
  --font-display: 'Orbitron', 'Rajdhani', sans-serif;
  --font-code: 'Fira Code', 'Consolas', monospace;
  --font-body: 'Inter', 'Roboto', sans-serif;
  --glow-cyan: 0 0 20px rgba(0, 212, 255, 0.4);
}

body.light {
  --bg-primary: #F8F9FA;
  --bg-secondary: #FFFFFF;
  --bg-card: #FFFFFF;
  --text-primary: #1A1A2E;
  --text-secondary: #5C6370;
  --accent-cyan: #1976D2;
  --accent-purple: #7B2CBF;
  --accent-green: #2E7D32;
  --border-color: #DDE1E6;
  --avatar-color: #1976D2; /* 浅色主题作者头像色（深蓝，浅底清晰） */
  --avatar-admin: #7B2CBF; /* 浅色主题管理员头像色（紫，与普通用户蓝色区分） */
  --glow-cyan: 0 0 20px rgba(25, 118, 210, 0.25);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

/* 作者头像图标（博客/社区共用 · 普通用户主题色人形 SVG / 管理员黑客图标） */
.avatar-icon { display: inline-flex; align-items: center; line-height: 1; margin-right: 3px; vertical-align: -1px; }
.avatar-icon svg { display: inline-block; vertical-align: middle; }

/* 关闭浏览器滚动锚定：SPA 详情替换列表注入内容时，Chrome 锚定补偿会把滚动位置
   从顶部拽回原视觉锚点（进入帖子"回顶"失效的根因）；overflow-anchor 由 Blink 支持 */
html { overflow-anchor: none; }

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  background-image: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0, 212, 255, 0.015) 2px, rgba(0, 212, 255, 0.015) 4px);
  background-size: 100% 4px;
  min-height: 100vh;
}

/* 导航栏 */
.navbar {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; /* 两侧 .logo/.nav-right 各 flex:1 等宽撑开，使中间 .nav-links 精确居中 */
  padding: 12px 40px;
  /* 不透明纯色、禁用 backdrop-filter：Android Chrome 上 sticky + backdrop-filter
     存在滚动重绘缺陷——导航栏随滚动滞后被卷走漏尾，纯背景才真正固顶 */
  background: #0d1117;
  border-bottom: 1px solid var(--border-color);
}
body.light .navbar { background: #ffffff; }

.logo {
  flex: 1; /* 左侧等宽撑开（与 .nav-right 的 flex:1 对称），中间的菜单块精确居中 */
  font-family: var(--font-display);
  font-size: 1.25rem; font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 1px;
  text-decoration: none;
  display: inline-flex; align-items: center; /* 图标与文字垂直居中，版本号除外 */
  transform: translateX(-10px); /* 整体左移 10px */
}

.nav-links { display: flex; gap: 24px; }
.nav-links a {
  color: var(--text-secondary); text-decoration: none;
  font-size: 0.92rem; transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent-cyan); }
.nav-links a.active { color: var(--accent-cyan); }

.nav-right { flex: 1; display: flex; align-items: center; justify-content: flex-end; gap: 16px; font-size: 0.9rem; }
.nav-right a { color: var(--text-secondary); text-decoration: none; }
.nav-right a:hover { color: var(--accent-cyan); }

.badge-admin {
  display: inline-block; background: rgba(123, 44, 191, 0.2);
  color: var(--accent-purple); font-size: 0.72rem;
  padding: 1px 8px; border-radius: 8px; margin-left: 4px;
  vertical-align: middle; transform: translateY(-1px); /* 与用户名垂直居中对齐（徽章小字号视觉偏下，微调上移） */
}

/* 右侧状态按钮统一：无边框、同字号（与 .nav-icon-btn 一致），悬停仅变色 */
.theme-toggle {
  background: none; border: none; cursor: pointer;
  padding: 2px 4px; font-size: 1.05rem; line-height: 1;
  color: var(--text-secondary); transition: color 0.2s;
}
.theme-toggle:hover { color: var(--accent-cyan); }
.navbar .avatar-icon svg { width: 16px; height: 16px; } /* 头像图标与 emoji 图标视觉尺寸统一 */
/* 注销并入头像：登录后头像即注销按钮（窄窗宽省一个图标），悬停半透明反馈 */
.nav-avatar { display: inline-flex; align-items: center; text-decoration: none; cursor: pointer; }
.nav-avatar:hover .avatar-icon { opacity: 0.65; }

.lang-switch {
  background: none; border: none; cursor: pointer;
  padding: 2px 4px; font-size: 0.9rem; line-height: 1.2;
  color: var(--text-secondary); display: inline-flex; align-items: center; gap: 5px;
  transition: color 0.2s;
}
.lang-switch:hover { color: var(--accent-cyan); }
.lang-ico { display: inline-flex; align-items: center; }

/* 语言下拉（桌面/窄屏通用）：为以后增加更多语言留空间 */
.lang-wrap { position: relative; display: inline-flex; }
.lang-dropdown {
  display: none; position: absolute; top: calc(100% + 8px); right: 0; z-index: 110;
  min-width: 110px; padding: 6px 0;
  background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}
.lang-dropdown.open { display: flex; flex-direction: column; }
.lang-dropdown a { padding: 8px 16px; color: var(--text-secondary); text-decoration: none; font-size: 0.88rem; white-space: nowrap; }
.lang-dropdown a:hover, .lang-dropdown a.active { color: var(--accent-cyan); }

/* 导航栏搜索框（登录区左侧，全站搜索） */
.nav-search { display: flex; align-items: center; border: 1px solid var(--border-color); border-radius: 16px; padding: 2px 8px; transition: border-color 0.3s; }
.nav-search:focus-within { border-color: var(--accent-cyan); box-shadow: var(--glow-cyan); }
.nav-search-btn { background: none; border: none; cursor: pointer; font-size: 0.85rem; color: var(--text-secondary); padding: 0 2px; line-height: 1; }
.nav-search input { background: none; border: none; outline: none; color: var(--text-primary); font-family: var(--font-body); font-size: 0.82rem; width: 130px; transition: width 0.3s; }
.nav-search input:focus { width: 190px; }
.nav-search input::placeholder { color: var(--text-secondary); }

/* ===== 手机屏导航适配：图标变体 + 栏目下拉 + 搜索弹框（窄屏样式见文末响应式块） ===== */
.nav-ico { display: none; font-size: 1.05rem; line-height: 1; }
.nav-icon-btn { background: none; border: none; cursor: pointer; font-size: 1.05rem; color: var(--text-secondary); padding: 2px 4px; line-height: 1; }
.nav-icon-btn:hover { color: var(--accent-cyan); }
.nav-search-icon-btn, .nav-menu-btn { display: none; } /* 仅窄屏显示 */
.nav-dropdown { display: none; } /* 仅窄屏以 .open 展开 */

/* 搜索结果页 */
.search-page { max-width: 820px; margin: 0 auto; padding: 32px 24px; min-height: 60vh; }
.search-page h1 { font-family: var(--font-display); color: var(--accent-cyan); margin-bottom: 16px; }
.search-meta { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 12px; }
.search-count { color: var(--text-secondary); font-size: 0.82rem; margin-bottom: 12px; }
.search-hint { color: var(--text-secondary); margin: 20px 0; }
.search-result { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; padding: 16px 20px; margin-bottom: 12px; transition: all 0.3s; }
.search-result:hover { border-color: var(--accent-cyan); box-shadow: var(--glow-cyan); }
.search-result h3 { margin-bottom: 6px; }
.search-result h3 a { color: var(--accent-cyan); text-decoration: none; font-size: 1.05rem; }
.search-result h3 a:hover { text-decoration: underline; }
.search-excerpt { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.7; margin-bottom: 8px; }
.search-excerpt mark { background: #ffd54d; color: #1a1a2e; border-radius: 2px; padding: 0 2px; }
body.light .search-excerpt mark { background: #fff3b0; color: #5c4a00; }
.search-crumb { color: var(--text-secondary); font-size: 0.8rem; }
.search-crumb a { color: var(--text-secondary); text-decoration: none; }
.search-crumb a:hover { color: var(--accent-cyan); text-decoration: underline; }
.crumb-sep { margin: 0 4px; opacity: 0.6; }

/* Hero */
.hero {
  text-align: center;
  padding: 110px 40px 70px;
  background: radial-gradient(ellipse at 50% 0%, rgba(0, 212, 255, 0.12), transparent 60%);
  position: relative; overflow: hidden;
}
.hero-title {
  font-family: var(--font-display);
  font-size: 3.4rem; font-weight: 700;
  background: linear-gradient(135deg, #00D4FF, #7B2CBF, #00D4FF);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: heroGlow 5s ease-in-out infinite;
}
@keyframes heroGlow { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
body.light .hero-title {
  background: linear-gradient(135deg, #1976D2, #7B2CBF, #1976D2);
  background-size: 200% 200%;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: heroGlow 5s ease-in-out infinite;
}

.hero-sub { margin-top: 16px; font-size: 1.15rem; color: var(--text-secondary); line-height: 1.8; }

.hero-buttons { display: flex; gap: 16px; justify-content: center; margin-top: 40px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 12px 32px; border-radius: 6px; font-size: 0.95rem;
  cursor: pointer; border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan); background: transparent;
  transition: all 0.3s; text-decoration: none;
}
.btn:hover { box-shadow: 0 0 20px rgba(0, 212, 255, 0.4); }
.btn-primary {
  background: linear-gradient(135deg, #00D4FF, #1976D2);
  color: #fff; border: none; font-weight: 600;
}
.btn-primary:hover { box-shadow: 0 0 30px rgba(0, 212, 255, 0.5); }

/* ===== Markdown 工具栏（博客/社区 发帖、编辑、回复共享；统一高度 + 深浅主题自适应）===== */
.md-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-top: 8px; padding: 8px;
  background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: 8px; }
/* 统一按钮高度（30px）、可见边框、深浅变量配色——随 body.light 自动切换 */
.md-toolbar button { display: inline-flex; align-items: center; justify-content: center;
  height: 30px; min-width: 34px; padding: 0 10px; border: 1px solid var(--border-color);
  border-radius: 6px; background: var(--bg-secondary); color: var(--text-secondary);
  cursor: pointer; font-size: 0.85rem; line-height: 1; white-space: nowrap; transition: all 0.2s; }
.md-toolbar button:hover { border-color: var(--accent-cyan); color: var(--accent-cyan); background: var(--bg-card); }
.md-toolbar .md-sep { width: 1px; min-width: 1px; height: 20px; margin: 0 4px; background: var(--border-color); }
/* 浅色主题微调（按钮底色更贴近卡片、文字更清晰） */
body.light .md-toolbar button { background: #F1F3F5; color: #4A5568; }
body.light .md-toolbar button:hover { background: #E2E8F0; color: var(--accent-cyan); }

/* 特性卡片 */
.features {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px; padding: 40px; max-width: 1200px; margin: 0 auto;
}
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 10px; padding: 28px; transition: box-shadow 0.3s;
}
.feature-card:hover { box-shadow: 0 0 30px rgba(0, 212, 255, 0.15); }
.feature-card h3 { font-size: 1.05rem; margin-bottom: 12px; color: var(--accent-cyan); }
.feature-card p { color: var(--text-secondary); font-size: 0.9rem; }

/* 区块标题 */
.section-title {
  text-align: center; font-family: var(--font-display);
  font-size: 1.4rem; color: var(--text-primary);
  margin: 40px 0 8px; letter-spacing: 2px;
}
.section-sub { text-align: center; color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 24px; }

/* 文档入口卡片 */
.doc-entry { max-width: 1200px; margin: 0 auto; padding: 0 40px 20px;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.entry-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 8px; padding: 24px; text-decoration: none; color: inherit;
  transition: all 0.3s; display: block;
}
.entry-card:hover { border-color: var(--accent-cyan); box-shadow: var(--glow-cyan); transform: translateY(-2px); }
.entry-card h3 { color: var(--accent-cyan); font-size: 1rem; margin-bottom: 8px; }
.entry-card p { color: var(--text-secondary); font-size: 0.88rem; }

/* 社区博客横幅 */
.entry-banner { max-width: 1200px; margin: 0 auto; padding: 0 40px 40px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* 页脚 */
.footer {
  text-align: center; padding: 32px; border-top: 1px solid var(--border-color);
  color: var(--text-secondary); font-size: 0.82rem;
}

/* 登录弹窗 */
.login-modal {
  display: none; position: fixed; inset: 0; z-index: 1000;
  background: rgba(0, 0, 0, 0.6);
  align-items: center; justify-content: center;
}
.login-modal.open { display: flex; }
.login-box {
  background: var(--bg-secondary); border: 1px solid var(--border-color);
  border-radius: 10px; padding: 32px; width: 380px; max-width: 90vw;
}
.login-box h3 { font-family: var(--font-display); color: var(--accent-cyan); margin-bottom: 16px; letter-spacing: 2px; }
.login-box input {
  width: 100%; padding: 10px 12px; margin: 8px 0;
  background: var(--bg-primary); border: 1px solid var(--border-color);
  border-radius: 6px; color: var(--text-primary); font-size: 0.9rem;
}
.login-box input:focus { outline: none; border-color: var(--accent-cyan); }
/* 密码框显示密码眼睛（自维护，不依赖浏览器原生 reveal，避免聚焦切走就消失） */
.pass-wrap { position: relative; }
.pass-wrap input { padding-right: 38px; }
/* 隐藏浏览器自带显示密码/清空图标，避免与自维护 👁 重复显示（Edge/IE 用 ::-ms-reveal/::-ms-clear） */
.pass-wrap input::-ms-reveal, .pass-wrap input::-ms-clear { display: none; }
.pass-wrap .toggle-pass { position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  background: none; border: none; cursor: pointer; font-size: 1.05rem; line-height: 1;
  color: var(--text-secondary); padding: 6px; opacity: 0.7; }
.pass-wrap .toggle-pass:hover { color: var(--accent-cyan); opacity: 1; }
.captcha-row { display: flex; gap: 8px; align-items: center; }
.captcha-row input { flex: 1; }
.captcha-row svg { cursor: pointer; border-radius: 6px; border: 1px solid var(--border-color); height: 40px; }
.login-error { color: #FF6B6B; font-size: 0.85rem; margin: 6px 0; min-height: 20px; }
.login-close { float: right; background: none; border: none; color: var(--text-secondary); font-size: 1.2rem; cursor: pointer; }
.login-close:hover { color: var(--accent-cyan); }

/* 关于页分节块 */
.about-section {
  max-width: 960px; margin: 0 auto; padding: 0 40px;
}
.about-section .block-head {
  padding: 14px 24px; border-radius: 8px 8px 0 0;
  background: linear-gradient(135deg, rgba(0,212,255,0.12), rgba(123,44,191,0.12));
  border: 1px solid var(--border-color); border-bottom: none;
  font-family: var(--font-display); font-size: 1.1rem;
  color: var(--accent-cyan); letter-spacing: 1px;
  margin-top: 28px;
}
.about-section .block-body {
  padding: 22px 26px; border-radius: 0 0 8px 8px;
  background: var(--bg-card); border: 1px solid var(--border-color);
  color: var(--text-secondary); line-height: 1.9; font-size: 0.95rem;
}
.about-section .block-body p { margin: 12px 0; }
.about-section .block-body ul { margin: 12px 24px; }
.about-section .block-body li { margin: 8px 0; }
.about-section .block-body strong { color: var(--text-primary); }
.about-section .block-body a { color: var(--accent-cyan); }
.about-hero {
  max-width: 960px; margin: 0 auto; padding: 56px 40px 24px;
  text-align: center;
}
.about-hero h1 { font-family: var(--font-display); font-size: 2.2rem;
  background: linear-gradient(135deg, #00D4FF, #7B2CBF);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 16px; }
.about-hero p { color: var(--text-secondary); line-height: 1.9; }

/* 通用内容区 */
.page-content { max-width: 960px; margin: 0 auto; padding: 48px 40px; }
.page-content h1 { font-family: var(--font-display); color: var(--accent-cyan); margin-bottom: 20px; }
/* 各级标题统一页标题的蓝色（accent-cyan） */
.page-content h2 { color: var(--accent-cyan); margin: 28px 0 12px; }
.page-content h3, .page-content h4 { color: var(--accent-cyan); margin: 20px 0 10px; }
.page-content p { margin: 12px 0; color: var(--text-secondary); }
.page-content ul { margin: 12px 24px; color: var(--text-secondary); }
.page-content li { margin: 6px 0; }

/* 滚动条 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-cyan); }

/* 响应式 */
/* 中等窗宽（≤1000px）：登录/语言/退出的文字 → 图标（防纵向折行），栏目与搜索框保留 */
@media (max-width: 1000px) {
  .nav-txt { display: none; }
  .nav-ico { display: inline; }
}
@media (max-width: 768px) {
  /* 导航栏：单行图标化——logo 左置，搜索/登录/主题/语言/☰ 右置成组 */
  .navbar { padding: 12px 16px; flex-wrap: nowrap; gap: 10px; }
  .logo { flex: 0 1 auto; } /* 取消桌面端 flex:1 居中撑开，右侧图标组靠右 */
  .nav-links { display: none; } /* 栏目折叠为 ☰ 下拉 */
  .nav-search { display: none; } /* 搜索框 → 🔍 图标弹框 */
  .nav-search-icon-btn, .nav-menu-btn { display: inline-flex; align-items: center; }
  .nav-txt { display: none; } /* 登录/语言/退出：文字 → 图标 */
  .nav-ico { display: inline; }
  .nav-right { gap: 12px; }
  /* ☰ 下拉面板：挂 sticky 导航栏下方右对齐 */
  .nav-dropdown {
    position: absolute; top: 100%; right: 12px; z-index: 110;
    min-width: 150px; padding: 6px 0;
    background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  }
  .nav-dropdown.open { display: flex; flex-direction: column; }
  .nav-dropdown a { padding: 9px 20px; color: var(--text-secondary); text-decoration: none; font-size: 0.92rem; }
  .nav-dropdown a:hover, .nav-dropdown a.active { color: var(--accent-cyan); }
  /* 主页三按钮纵向排列：逐行居中占满，避免 2+1 错落 */
  .hero-buttons { flex-direction: column; align-items: center; }
  .hero-buttons .btn { width: 100%; max-width: 340px; text-align: center; box-sizing: border-box; }
  .features { grid-template-columns: 1fr; padding: 24px 16px; }
  .doc-entry, .entry-banner { grid-template-columns: 1fr; padding: 0 16px; }
  .hero { padding: 70px 16px 40px; }
  .hero-title { font-size: 2.2rem; }
  .page-content { padding: 32px 16px; }
}

/* 打印 */
@media print { .navbar, .login-modal { display: none; } }

/* ===== 博客代码框：深色底 + 语言标签 + 一键复制 + 语法高亮 ===== */
.code-block { margin: 16px 0; border: 1px solid var(--border-color); border-radius: 8px;
  overflow: hidden; background: #0d1117; }
body.light .code-block { background: #f6f8fa; }
.code-header { display: flex; align-items: center; justify-content: flex-end; gap: 10px;
  padding: 5px 12px; background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid var(--border-color); }
body.light .code-header { background: rgba(0, 0, 0, 0.04); }
.code-lang { font-family: var(--font-code); font-size: 0.72rem; letter-spacing: 0.6px;
  text-transform: uppercase; color: var(--accent-cyan); user-select: none; }
.copy-btn { background: none; border: 1px solid var(--border-color); border-radius: 4px;
  color: var(--text-secondary); font-size: 0.75rem; padding: 2px 10px; cursor: pointer;
  font-family: var(--font-sans); transition: color 0.2s, border-color 0.2s; }
.copy-btn:hover { color: var(--accent-cyan); border-color: var(--accent-cyan); }
.copy-btn.copied { color: #4ade80; border-color: #4ade80; }
.code-block pre { margin: 0; padding: 14px 16px; overflow-x: auto; background: transparent; }
.code-block pre code { background: none; padding: 0; font-family: var(--font-code);
  font-size: 0.85rem; line-height: 1.65; color: var(--text-primary); white-space: pre; }
/* 语法 token（深色主题） */
.tok-fn { color: #8fb6ff; }
.tok-str { color: #a5d6ff; }
.tok-com { color: #8b949e; font-style: italic; }
.tok-num { color: #ffa657; }
.tok-kw { color: #d2a8ff; }
.tok-tag { color: #7ee787; }
.tok-attr { color: #79c0ff; }
/* 语法 token（浅色主题） */
body.light .tok-fn { color: #0550ae; }
body.light .tok-str { color: #0b5cad; }
body.light .tok-com { color: #6a737d; }
body.light .tok-num { color: #b35900; }
body.light .tok-kw { color: #8250df; }
body.light .tok-tag { color: #22863a; }
body.light .tok-attr { color: #0550ae; }

/* 多语言代码 tab（```tabs） */
.code-tab-btn { background: none; border: 1px solid var(--border-color); border-radius: 4px;
  color: var(--text-secondary); font-size: 0.75rem; padding: 2px 10px; cursor: pointer;
  font-family: var(--font-code); text-transform: uppercase; letter-spacing: 0.4px;
  transition: color 0.2s, border-color 0.2s, background 0.2s; }
.code-tab-btn:hover { color: var(--accent-cyan); border-color: var(--accent-cyan); }
.code-tab-btn.active { color: var(--accent-cyan); border-color: var(--accent-cyan); background: rgba(0, 212, 255, 0.08); }
.code-pane { display: none; margin: 0; }
.code-pane.active { display: block; }
.code-tabs .code-header { justify-content: flex-start; gap: 6px; }
.code-tabs .copy-btn { margin-left: auto; }

/* ===== 主页 Hero 增强（分形背景 + 网格 + 扫描线） ===== */
.hero::before {
  content: '';
  position: absolute; inset: -4%;
  background: url('/images/fractal-dark.svg') center / cover no-repeat;
  transform-origin: center;
  animation: fractalGrow 26s ease-in-out infinite alternate;
  z-index: 0;
  opacity: 0.85;
}
body.light .hero::before {
  background: url('/images/fractal-light.svg') center / cover no-repeat;
  opacity: 0.7;
}
@keyframes fractalGrow {
  from { transform: scale(0.45); }
  to { transform: scale(1.12); }
}
.hero-grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  animation: gridDrift 24s linear infinite;
  pointer-events: none;
}
@keyframes gridDrift {
  from { background-position: 0 0; }
  to { background-position: 48px 48px; }
}
.scanline {
  position: absolute; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.9), transparent);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.5);
  animation: scanMove 4s linear infinite;
  z-index: 1;
  pointer-events: none;
}
@keyframes scanMove {
  0% { top: -2%; }
  100% { top: 102%; }
}
.hero-title, .hero-sub, .hero-buttons { position: relative; z-index: 2; }

/* 平台介绍框 */
.intro-box {
  max-width: 900px; margin: 40px auto 0; padding: 28px 40px;
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-cyan);
  border-radius: 8px; font-size: 1.02rem; line-height: 1.9;
  color: var(--text-secondary); text-align: center;
}
.intro-box:hover { box-shadow: var(--glow-cyan); }

.feature-icon { font-size: 2.4rem; margin-bottom: 14px; }

/* 最新动态（社区+博客） */
.latest-section {
  max-width: 1200px; margin: 0 auto; padding: 0 40px 20px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
}
.latest-col { background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 10px; padding: 22px 24px; }
.latest-col h3 { font-family: var(--font-display); font-size: 0.95rem;
  color: var(--accent-cyan); margin-bottom: 14px; letter-spacing: 1px; }
.latest-item { padding: 10px 0; border-bottom: 1px solid rgba(48,54,61,0.4);
  cursor: pointer; transition: all 0.2s; display: block; text-decoration: none; }
.latest-item:last-child { border-bottom: none; }
.latest-item:hover { padding-left: 8px; }
.latest-item .li-title { color: var(--text-primary); font-size: 0.92rem;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.latest-item:hover .li-title { color: var(--accent-cyan); }
.latest-item .li-meta { color: var(--text-secondary); font-size: 0.78rem;
  margin-top: 3px; display: flex; gap: 12px; }
.latest-more { display: inline-block; margin-top: 12px; color: var(--accent-cyan);
  font-size: 0.85rem; text-decoration: none; }
.latest-more:hover { text-decoration: underline; }
.latest-empty { color: var(--text-secondary); font-size: 0.85rem; padding: 8px 0; }
@media (max-width: 768px) {
  .latest-section { grid-template-columns: 1fr; padding: 0 16px; }
}

/* 正文超链接颜色：深色主题用浅色链接（默认浏览器蓝/紫在深底太暗），浅色主题用深色链接。
   仅作用于正文容器，不影响导航栏与侧边栏标题锚点 */
.doc-main a:not(.btn), .subsystem-dev-main a:not(.btn), .page-content a:not(.btn),
.blog-content a:not(.btn), .preview-box a:not(.btn), .post-content a:not(.btn),
.reply-item a:not(.btn), .community-page a:not(.btn) { color: #6CB6FF; }
.doc-main a:not(.btn):visited, .subsystem-dev-main a:not(.btn):visited,
.page-content a:not(.btn):visited, .blog-content a:not(.btn):visited,
.preview-box a:not(.btn):visited, .post-content a:not(.btn):visited,
.reply-item a:not(.btn):visited, .community-page a:not(.btn):visited { color: #C08BFF; }
.doc-main a:not(.btn):hover, .subsystem-dev-main a:not(.btn):hover,
.page-content a:not(.btn):hover, .blog-content a:not(.btn):hover,
.preview-box a:not(.btn):hover, .post-content a:not(.btn):hover,
.reply-item a:not(.btn):hover, .community-page a:not(.btn):hover { color: #8FD0FF; }
body.light .doc-main a:not(.btn), body.light .subsystem-dev-main a:not(.btn),
body.light .page-content a:not(.btn), body.light .blog-content a:not(.btn),
body.light .preview-box a:not(.btn), body.light .post-content a:not(.btn),
body.light .reply-item a:not(.btn), body.light .community-page a:not(.btn) { color: #0969DA; }
body.light .doc-main a:not(.btn):visited, body.light .subsystem-dev-main a:not(.btn):visited,
body.light .page-content a:not(.btn):visited, body.light .blog-content a:not(.btn):visited,
body.light .preview-box a:not(.btn):visited, body.light .post-content a:not(.btn):visited,
body.light .reply-item a:not(.btn):visited, body.light .community-page a:not(.btn):visited { color: #8250DF; }
body.light .doc-main a:not(.btn):hover, body.light .subsystem-dev-main a:not(.btn):hover,
body.light .page-content a:not(.btn):hover, body.light .blog-content a:not(.btn):hover,
body.light .preview-box a:not(.btn):hover, body.light .post-content a:not(.btn):hover,
body.light .reply-item a:not(.btn):hover, body.light .community-page a:not(.btn):hover { color: #0A4DA6; }

/* 正文两端对齐（博客/社区/回复/预览共用）：中英混排段落右缘参差如犬牙，
   justify + break-word 使左右两缘齐整；代码框/表格/行内码保持左对齐，避免拉伸空隙 */
.blog-content, .post-content, .reply-content, .preview-box {
  text-align: justify; text-justify: inter-ideograph; overflow-wrap: break-word; }
.blog-content pre, .post-content pre, .reply-content pre, .preview-box pre,
.blog-content .code-block, .post-content .code-block, .reply-content .code-block, .preview-box .code-block,
.blog-content code, .post-content code, .reply-content code, .preview-box code,
.blog-content table, .post-content table, .reply-content table, .preview-box table {
  text-align: left; }

/* Markdown 表格（博客/社区/预览共用）：边框 + 表头底色，深浅主题随变量 */
.blog-content table, .preview-box table, .post-content table, .reply-content table {
  border-collapse: collapse; width: 100%; margin: 14px 0; font-size: 0.9rem; }
.blog-content table th, .preview-box table th, .post-content table th, .reply-content table th,
.blog-content table td, .preview-box table td, .post-content table td, .reply-content table td {
  border: 1px solid var(--border-color); padding: 6px 10px; text-align: left; }
.blog-content table th, .preview-box table th, .post-content table th, .reply-content table th {
  background: var(--bg-secondary); color: var(--text-primary); }
.code-block table, .code-tabs table { width: 100%; border-collapse: collapse; }

/* Markdown 引用（blockquote）：左侧主题色竖线 + 底色，清晰可读 */
.blog-content blockquote, .preview-box blockquote, .post-content blockquote, .reply-content blockquote {
  border-left: 4px solid var(--accent-cyan); margin: 14px 0; padding: 8px 16px;
  color: var(--text-primary); background: var(--bg-secondary); border-radius: 0 6px 6px 0; }

/* Markdown 标题（博客/社区/预览归一）：分级字号，层级分明 */
.preview-box h1, .post-content h1, .reply-content h1 { font-size: 1.75rem; }
.preview-box h2, .post-content h2, .reply-content h2 { font-size: 1.35rem; }
.preview-box h3, .post-content h3, .reply-content h3 { font-size: 1.1rem; }
.preview-box h1, .preview-box h2, .preview-box h3, .preview-box h4,
.post-content h1, .post-content h2, .post-content h3, .post-content h4,
.reply-content h1, .reply-content h2, .reply-content h3, .reply-content h4 {
  color: var(--accent-cyan); margin: 20px 0 10px; line-height: 1.4; }

/* 分享给我的 Agent：导航栏分享图标 */
.share-link { font-size: 1.05rem; text-decoration: none; color: var(--text-secondary); }
.share-link:hover { color: var(--accent-cyan); }