/* blog.css — linuxROS Blog v2 视觉设计系统 */
/* ====== Design Tokens ====== */
:root {
  /* 主色系 */
  --c-primary: #6366f1;
  --c-primary-l: #818cf8;
  --c-primary-d: #4f46e5;
  --c-primary-bg: #eef2ff;
  --c-primary-border: #c7d2fe;

  /* 强调色 */
  --c-cyan: #06b6d4;
  --c-cyan-bg: #ecfeff;
  --c-emerald: #10b981;
  --c-emerald-bg: #ecfdf5;
  --c-amber: #f59e0b;
  --c-amber-bg: #fffbeb;
  --c-rose: #f43f5e;

  /* 中性色 */
  --c-bg: #f8fafc;
  --c-surface: #ffffff;
  --c-text: #0f172a;
  --c-text2: #334155;
  --c-text3: #64748b;
  --c-text4: #94a3b8;
  --c-border: #e2e8f0;
  --c-border2: #cbd5e1;

  /* 语义色 */
  --c-success: #10b981;
  --c-success-bg: #ecfdf5;
  --c-warning: #f59e0b;
  --c-error: #ef4444;

  /* 排版 */
  --font: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Fira Code", "JetBrains Mono", "Consolas", "Monaco", monospace;

  /* 间距 (8px 基准) */
  --sp-xs: 4px;  --sp-sm: 8px;  --sp-md: 16px;
  --sp-lg: 24px; --sp-xl: 32px; --sp-2xl: 48px; --sp-3xl: 64px;

  /* 圆角 */
  --radius-sm: 6px; --radius-md: 10px; --radius-lg: 14px; --radius-xl: 20px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.08);
  --shadow-xl: 0 12px 40px rgba(0,0,0,.10);
  --shadow-glow: 0 0 20px rgba(99,102,241,.15);

  /* 过渡 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ====== 暗色主题 ====== */
[data-theme="dark"] {
  --c-primary: #818cf8;
  --c-primary-l: #a5b4fc;
  --c-primary-d: #6366f1;
  --c-primary-bg: #1e1b4b;
  --c-primary-border: #3730a3;
  --c-cyan: #22d3ee;
  --c-cyan-bg: #0f2328;
  --c-emerald: #34d399;
  --c-emerald-bg: #0f2618;
  --c-amber: #fbbf24;
  --c-amber-bg: #2b2000;
  --c-rose: #fb7185;
  --c-bg: #0f172a;
  --c-surface: #1e293b;
  --c-text: #f1f5f9;
  --c-text2: #cbd5e1;
  --c-text3: #94a3b8;
  --c-text4: #64748b;
  --c-border: #334155;
  --c-border2: #475569;
  --c-success: #34d399;
  --c-success-bg: #0f2618;
  --c-warning: #fbbf24;
  --c-error: #f87171;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,.4);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.5);
  --shadow-xl: 0 12px 40px rgba(0,0,0,.6);
  --shadow-glow: 0 0 20px rgba(99,102,241,.25);
}
[data-theme="dark"] body { background: var(--c-bg); color: var(--c-text); }
[data-theme="dark"] .site-header { background: rgba(15,23,42,.85); border-bottom-color: var(--c-border); }
[data-theme="dark"] .site-header.scrolled { background: rgba(15,23,42,.95); }
[data-theme="dark"] .logo { color: var(--c-text); }
[data-theme="dark"] .card, [data-theme="dark"] .article-card, [data-theme="dark"] .tool-card, [data-theme="dark"] .game-card, [data-theme="dark"] .nav-card { background: var(--c-surface); }
[data-theme="dark"] input, [data-theme="dark"] textarea, [data-theme="dark"] select { background: var(--c-bg); color: var(--c-text); border-color: var(--c-border); }
[data-theme="dark"] input:focus, [data-theme="dark"] textarea:focus, [data-theme="dark"] select:focus { background: var(--c-surface); }
[data-theme="dark"] .site-footer { border-top-color: var(--c-border); }
[data-theme="dark"] .fixed-btn { background: rgba(30,41,59,.9); }
[data-theme="dark"] .fixed-btn:hover { background: var(--c-primary); }
[data-theme="dark"] .upload-zone { background: var(--c-surface); border-color: var(--c-border2); }
[data-theme="dark"] .upload-zone:hover { background: var(--c-primary-bg); }
[data-theme="dark"] .btn-secondary { background: var(--c-surface); color: var(--c-text2); }
[data-theme="dark"] .preview-pane { background: var(--c-surface); }
[data-theme="dark"] .visitor-bar { background: var(--c-surface); }
[data-theme="dark"] .tools-hero { background: linear-gradient(135deg, #1e1b4b, #0f172a); }

/* ====== 主题切换按钮 ====== */
.theme-toggle{width:36px;height:36px;border-radius:10px;border:1px solid var(--c-border);background:var(--c-surface);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s var(--ease-out);flex-shrink:0;margin-left:8px}
.theme-toggle:hover{background:var(--c-primary-bg);border-color:var(--c-primary);transform:scale(1.08)}
.theme-toggle svg{width:18px;height:18px;color:var(--c-text3);transition:color .2s}
.theme-toggle:hover svg{color:var(--c-primary)}
.theme-icon-moon{display:none}
[data-theme="dark"] .theme-icon-sun{display:none}
[data-theme="dark"] .theme-icon-moon{display:block}

/* ====== Reset ====== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  background:var(--c-bg);
  color:var(--c-text);
  min-height:100vh;
  overflow-x:hidden;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
a{color:var(--c-primary);text-decoration:none;transition:color .2s var(--ease-out)}
a:hover{color:var(--c-primary-d)}
img{max-width:100%;height:auto;display:block}

/* ====== Reading Progress Bar ====== */
.reading-progress{
  position:fixed;top:0;left:0;z-index:200;
  height:3px;
  background:linear-gradient(90deg, var(--c-primary), var(--c-cyan), var(--c-emerald));
  border-radius:0 2px 2px 0;
  transition:width .1s linear;
  box-shadow:0 0 6px rgba(99,102,241,.3);
}

/* ====== Header ====== */
.site-header{
  background:rgba(255,255,255,.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-border);
  position:sticky;
  top:3px;
  z-index:100;
  transition:box-shadow .3s var(--ease-out);
}
.site-header.scrolled{box-shadow:var(--shadow-md)}

.site-nav{
  max-width:1100px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 var(--sp-lg);height:56px;
}
.site-nav .logo{
  font-size:20px;font-weight:800;color:var(--c-primary);
  letter-spacing:-.5px;display:flex;align-items:center;gap:8px;
}
.site-nav .logo::before{
  content:'';display:inline-block;
  width:8px;height:8px;background:var(--c-emerald);
  border-radius:50%;box-shadow:0 0 8px rgba(16,185,129,.5);
}

.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  display:inline-flex;align-items:center;gap:5px;
  font-size:14px;font-weight:500;color:var(--c-text2);
  padding:6px 14px;border-radius:var(--radius-md);
  transition:all .25s var(--ease-out);position:relative;
  overflow:hidden;
}
.nav-links a::after{
  content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);
  width:0;height:2px;background:var(--c-primary);
  border-radius:1px;transition:width .3s var(--ease-out);
}
.nav-links a:hover{color:var(--c-primary);background:var(--c-primary-bg)}
.nav-links a:hover::after{width:60%}
.nav-links a.active{color:var(--c-primary);background:var(--c-primary-bg)}
.nav-links a.active::after{width:60%}

/* 工具链接较小字体（未备案） */
.nav-links a.nav-tools{
  font-size:11.5px;opacity:.75;letter-spacing:.5px;
}

.nav-stats{
  display:flex;align-items:center;gap:12px;
  margin-left:8px;padding-left:12px;
  border-left:1px solid var(--c-border);
}
.stat-mini{
  display:flex;align-items:center;gap:4px;
  font-size:11px;color:var(--c-text4);
}
.stat-mini .stat-icon{
  width:14px;height:14px;opacity:.6;
}

/* 移动端汉堡菜单 */
.nav-toggle{
  display:none;flex-direction:column;gap:5px;
  background:none;border:none;cursor:pointer;padding:4px;z-index:101;
}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--c-text);border-radius:2px;transition:all .3s var(--ease-out)}

/* ====== Fixed Side Buttons ====== */
.fixed-buttons{
  position:fixed;right:16px;top:50%;transform:translateY(-50%);
  z-index:90;display:flex;flex-direction:column;gap:12px;
}
.fixed-btn{
  width:42px;height:42px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.82);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border:1px solid var(--c-border);
  border-radius:var(--radius-md);
  color:var(--c-text3);
  cursor:pointer;
  transition:all .25s var(--ease-out);
  position:relative;
  box-shadow:var(--shadow-sm);
}
.fixed-btn:hover{
  color:var(--c-primary);
  border-color:var(--c-primary-border);
  background:var(--c-primary-bg);
  transform:scale(1.08);
  box-shadow:var(--shadow-glow);
}
.fixed-btn:active{transform:scale(.95)}
.fixed-btn .btn-tip{
  position:absolute;right:54px;top:50%;transform:translateY(-50%);
  background:var(--c-text);color:#fff;font-size:11px;white-space:nowrap;
  padding:4px 10px;border-radius:var(--radius-sm);
  opacity:0;pointer-events:none;
  transition:opacity .2s var(--ease-out);
}
.fixed-btn:hover .btn-tip{opacity:1}

/* ====== Hero Section ====== */
.hero-section{
  position:relative;overflow:hidden;
  padding:var(--sp-3xl) var(--sp-lg) var(--sp-2xl);
  text-align:center;
  background:linear-gradient(180deg, #eef2ff 0%, #f8fafc 100%);
}
.hero-section::before{
  content:'';position:absolute;top:-50%;left:-50%;
  width:200%;height:200%;
  background:
    radial-gradient(circle at 20% 50%, rgba(99,102,241,.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(6,182,212,.05) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(16,185,129,.04) 0%, transparent 50%);
  animation:heroBgFloat 20s ease-in-out infinite;
  pointer-events:none;
}
@keyframes heroBgFloat{0%,100%{transform:translate(0,0)}33%{transform:translate(1%,-1%)}66%{transform:translate(-1%,1%)}}

.hero-content{position:relative;z-index:1;max-width:700px;margin:0 auto}

.hero-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 14px;background:var(--c-surface);
  border:1px solid var(--c-border);border-radius:20px;
  font-size:12px;font-weight:500;color:var(--c-text3);
  margin-bottom:var(--sp-lg);
}
.hero-badge .dot{
  width:6px;height:6px;background:var(--c-emerald);
  border-radius:50%;animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.2)}}

.hero-title{
  font-size:clamp(28px,5vw,44px);font-weight:800;line-height:1.2;
  margin-bottom:var(--sp-md);
  background:linear-gradient(135deg, var(--c-primary) 0%, var(--c-cyan) 50%, var(--c-primary-d) 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.hero-subtitle{font-size:17px;color:var(--c-text2);line-height:1.7;margin-bottom:var(--sp-xl);max-width:540px;margin-left:auto;margin-right:auto;min-height:1.7em}
.hero-subtitle .cursor{display:inline-block;width:2px;height:1.1em;background:var(--c-primary);margin-left:2px;vertical-align:text-bottom;animation:cursorBlink .8s steps(1) infinite}
@keyframes cursorBlink{0%,100%{opacity:1}50%{opacity:0}}

.hero-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}

.btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 24px;font-size:15px;font-weight:600;
  border-radius:var(--radius-md);
  transition:all .25s var(--ease-out);
  cursor:pointer;border:none;text-decoration:none;
}
.btn-primary{
  background:var(--c-primary);color:#fff;
  box-shadow:0 2px 8px rgba(99,102,241,.35);
}
.btn-primary:hover{
  background:var(--c-primary-d);color:#fff;
  transform:translateY(-1px);
  box-shadow:0 4px 16px rgba(99,102,241,.45);
}
.btn-outline{
  background:var(--c-surface);color:var(--c-text2);
  border:1.5px solid var(--c-border);
}
.btn-outline:hover{
  color:var(--c-primary);border-color:var(--c-primary);
  background:var(--c-primary-bg);
}

/* Stats Card (首页) */
.hero-stats{
  display:flex;justify-content:center;gap:var(--sp-2xl);
  margin-top:var(--sp-xl);padding-top:var(--sp-lg);
  border-top:1px solid var(--c-border);
}
.hero-stat{text-align:center}
.hero-stat .num{font-size:28px;font-weight:800;color:var(--c-text);line-height:1}
.hero-stat .label{font-size:12px;color:var(--c-text3);margin-top:4px}

/* ====== Main Container ====== */
.app{max-width:1100px;margin:0 auto;padding:0 var(--sp-lg) var(--sp-2xl)}

/* ====== Section Header ====== */
.section-header{text-align:center;padding:var(--sp-2xl) 0 var(--sp-lg)}
.section-header h2{font-size:24px;font-weight:700;color:var(--c-text);margin-bottom:6px}
.section-header .section-desc{font-size:14px;color:var(--c-text3)}

/* ====== Category Filter Tabs ====== */
.category-tabs{
  display:flex;justify-content:center;flex-wrap:wrap;gap:8px;
  padding-bottom:var(--sp-lg);
}
.category-tab{
  padding:7px 18px;font-size:13px;font-weight:500;
  color:var(--c-text2);background:var(--c-surface);
  border:1.5px solid var(--c-border);border-radius:20px;
  cursor:pointer;transition:all .25s var(--ease-out);
  user-select:none;
}
.category-tab:hover{
  color:var(--c-primary);border-color:var(--c-primary-border);
  background:var(--c-primary-bg);transform:translateY(-1px);
}
.category-tab.active{
  color:#fff;background:var(--c-primary);border-color:var(--c-primary);
  box-shadow:0 2px 8px rgba(99,102,241,.3);
}

/* ====== Blog Filter Bar ====== */
.blog-filter-bar{
  display:flex;flex-wrap:wrap;gap:6px;
  justify-content:center;padding:0 0 var(--sp-xl) 0;
  margin-bottom:var(--sp-lg);
}
.filter-chip{
  display:inline-flex;align-items:center;gap:4px;
  padding:6px 14px;font-size:13px;font-weight:500;
  border:1px solid var(--c-border);border-radius:20px;
  background:var(--c-surface);color:var(--c-text2);
  text-decoration:none;transition:all .2s var(--ease-out);
  user-select:none;
}
.filter-chip:hover{
  color:var(--c-primary);border-color:var(--c-primary-border);
  background:var(--c-primary-bg);
}
.filter-chip.active{
  color:#fff;background:var(--c-primary);border-color:var(--c-primary);
  box-shadow:0 2px 6px rgba(99,102,241,.3);
}
.filter-chip small{font-size:11px;opacity:.7}
.filter-chip.active small{opacity:1}

/* ====== Hero Compact（博客页轻量Hero） ====== */
.hero-compact{padding:var(--sp-xl) var(--sp-lg) var(--sp-lg);text-align:center}
.hero-compact .hero-content{max-width:600px}
.hero-compact .hero-title{font-size:clamp(22px,4vw,32px)}

/* ====== Blog Sidebar Enhanced ====== */
.sidebar-title{
  display:flex;align-items:center;gap:6px;
  font-size:14px;font-weight:700;color:var(--c-text);
  margin-bottom:var(--sp-sm);
}
.sidebar-list{list-style:none;padding:0}
.sidebar-list li{margin-bottom:2px}
.sidebar-list a{
  display:block;font-size:13px;color:var(--c-text2);padding:4px 0;
  text-decoration:none;transition:color .2s;
}
.sidebar-list a:hover,.sidebar-list a.active{color:var(--c-primary);font-weight:600}
.sidebar-list .count{color:var(--c-text4);font-size:12px}
.tag-chip{
  display:inline-block;padding:2px 8px;font-size:12px;
  border:1px solid var(--c-border);border-radius:4px;
  color:var(--c-text3);text-decoration:none;
  transition:all .2s;
}
.tag-chip:hover,.tag-chip.active{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}

/* ====== Pagination Extended ====== */
.pagination{margin-top:24px}
.pagination .btn{padding:6px 14px;font-size:13px}

/* ====== Section Header ====== */
.section-header{text-align:center;padding:12px 0 20px}
.section-header h2{font-size:22px;font-weight:700;color:var(--c-text)}
.section-header .section-desc{font-size:14px;color:var(--c-text3);margin-top:4px}
.count-badge{
  display:inline-block;padding:2px 10px;font-size:13px;font-weight:500;
  background:var(--c-primary-bg);color:var(--c-primary);border-radius:12px;
  margin-left:8px;vertical-align:middle;
}

/* ====== Article Grid ====== */
.articles-grid{
  display:grid;grid-template-columns:repeat(3, 1fr);
  gap:var(--sp-lg);padding-bottom:var(--sp-lg);
}

.article-card{
  background:var(--c-surface);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-md);padding:var(--sp-lg);
  border:1px solid transparent;
  transition:all .35s var(--ease-out);
  display:flex;flex-direction:column;
  cursor:pointer;
}
.article-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
  border-color:var(--c-primary-border);
}
.article-card:active{transform:scale(.98)}
.article-card .card-category{
  font-size:11px;font-weight:600;
  text-transform:uppercase;letter-spacing:.5px;
  color:var(--c-primary);margin-bottom:8px;
}
.article-card h2{font-size:17px;font-weight:700;margin-bottom:8px;line-height:1.4}
.article-card h2 a{color:var(--c-text)}
.article-card h2 a:hover{color:var(--c-primary)}
.article-card .article-meta{
  display:flex;align-items:center;gap:10px;
  font-size:12px;color:var(--c-text3);margin-bottom:10px;
}
.article-card .article-meta .views{
  display:flex;align-items:center;gap:3px;
}
.article-card .article-summary{
  font-size:14px;line-height:1.7;color:var(--c-text2);
  flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.article-card .article-tags{
  display:flex;flex-wrap:wrap;gap:6px;margin-top:12px;padding-top:12px;
  border-top:1px solid var(--c-border);
}
.article-card .article-tags a{
  font-size:11px;padding:2px 8px;
  background:var(--c-primary-bg);color:var(--c-primary);
  border-radius:var(--radius-sm);border:1px solid var(--c-primary-border);
  transition:all .2s;
}
.article-card .article-tags a:hover{background:var(--c-primary);color:#fff}

/* ====== Blog Layout (列表页) ====== */
.blog-layout{display:flex;gap:var(--sp-xl);padding-top:var(--sp-lg)}
.blog-main{flex:1;min-width:0}
.blog-sidebar{width:240px;flex-shrink:0}

/* ====== Sidebar ====== */
.sidebar-card{
  background:var(--c-surface);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-md);padding:var(--sp-md);
  margin-bottom:var(--sp-md);border:1px solid var(--c-border);
}
.sidebar-card h3{
  font-size:14px;font-weight:700;color:var(--c-text);
  margin-bottom:10px;padding-bottom:8px;
  border-bottom:1px solid var(--c-border);
}
.sidebar-card a{display:block;font-size:13px;color:var(--c-text2);padding:4px 0;transition:color .2s}
.sidebar-card a:hover,.sidebar-card a.active{color:var(--c-primary);font-weight:600}
.sidebar-card .tag-cloud{display:flex;flex-wrap:wrap;gap:6px}
.sidebar-card .tag-cloud a{
  display:inline-block;font-size:12px;padding:2px 8px;
  background:#f8fafc;color:var(--c-text2);
  border-radius:var(--radius-sm);border:1px solid var(--c-border);
  transition:all .2s;
}
.sidebar-card .tag-cloud a:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}

/* ====== Article Detail ====== */
.article-detail{
  background:var(--c-surface);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-md);padding:var(--sp-xl) var(--sp-lg);
  border:1px solid var(--c-border);
}
.article-detail .article-header{margin-bottom:var(--sp-lg);padding-bottom:var(--sp-md);border-bottom:1px solid var(--c-border)}
.article-detail .article-header h1{font-size:28px;font-weight:800;line-height:1.4;margin-bottom:12px;color:var(--c-text)}
.article-detail .article-header .article-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--c-text3)}
.article-detail .article-header .tag{
  display:inline-block;padding:2px 8px;background:var(--c-primary-bg);
  color:var(--c-primary);border-radius:var(--radius-sm);font-size:12px;
}
.article-detail .article-content{font-size:15px;line-height:1.9;color:var(--c-text2)}
.article-detail .article-content h1{font-size:22px;margin:24px 0 12px;padding-bottom:6px;border-bottom:1px solid var(--c-border)}
.article-detail .article-content h2{font-size:20px;margin:20px 0 10px;padding-bottom:4px;border-bottom:1px solid var(--c-border)}
.article-detail .article-content h3{font-size:17px;margin:16px 0 8px}
.article-detail .article-content p{margin:0 0 12px}
.article-detail .article-content ul,.article-detail .article-content ol{margin:8px 0;padding-left:24px}
.article-detail .article-content li{margin:4px 0}
.article-detail .article-content blockquote{
  margin:12px 0;padding:10px 16px;
  border-left:3px solid var(--c-primary);
  background:var(--c-primary-bg);
  border-radius:0 var(--radius-md) var(--radius-md) 0;
  color:var(--c-text2);
}
.article-detail .article-content table{width:100%;border-collapse:collapse;margin:12px 0;font-size:14px}
.article-detail .article-content th,.article-detail .article-content td{border:1px solid var(--c-border);padding:8px 12px;text-align:left}
.article-detail .article-content th{background:#f8fafc;font-weight:600}
.article-detail .article-content img{max-width:100%;border-radius:var(--radius-md);margin:8px 0}
.article-detail .article-content pre{border-radius:var(--radius-md);margin:12px 0;overflow-x:auto}
.article-detail .article-content code{font-family:var(--font-mono);font-size:13px}
.article-detail .article-content p code{background:#f1f5f9;padding:2px 6px;border-radius:4px;color:var(--c-primary-d)}
.article-detail .article-content .highlight{background:#f8fafc;border:1px solid var(--c-border);border-radius:var(--radius-md);padding:14px 16px;overflow-x:auto}
.article-detail .article-content .mermaid{text-align:center;margin:16px 0}

/* ====== Pagination ====== */
.pagination{display:flex;justify-content:center;align-items:center;gap:16px;padding:20px 0}
.pagination a{display:inline-block;padding:8px 16px;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-md);font-size:14px;color:var(--c-text2);transition:all .2s}
.pagination a:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}
.pagination span{font-size:14px;color:var(--c-text3)}

/* ====== Portal Gate ====== */
.pw-gate{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;padding:20px}
.pw-gate .lock-icon{font-size:64px;margin-bottom:16px}
.pw-gate h1{font-size:24px;color:var(--c-text);margin-bottom:8px;font-weight:700}
.pw-gate .pw-sub{font-size:14px;color:var(--c-text3);margin-bottom:28px}
.pw-gate .pw-input{display:flex;gap:8px}
.pw-gate .pw-input input{padding:10px 16px;border:2px solid var(--c-border);border-radius:var(--radius-md);font-size:14px;width:200px;outline:none;transition:border-color .2s}
.pw-gate .pw-input input:focus{border-color:var(--c-primary)}
.pw-gate .pw-input button{padding:10px 20px;background:var(--c-primary);color:#fff;border:none;border-radius:var(--radius-md);font-size:14px;font-weight:600;cursor:pointer;transition:background .2s}
.pw-gate .pw-input button:hover{background:var(--c-primary-d)}
.pw-gate .pw-error{color:var(--c-error);font-size:13px;margin-top:12px;display:none}

/* ====== About Page ====== */
.page-header{text-align:center;padding:var(--sp-xl) 0 var(--sp-md)}
.page-header .avatar{
  width:88px;height:88px;
  background:linear-gradient(135deg, var(--c-primary), var(--c-cyan));
  border-radius:50%;margin:0 auto 14px;
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:36px;font-weight:700;
}
.page-header h1{font-size:24px;font-weight:800;margin-bottom:6px}
.page-header .subtitle{font-size:14px;color:var(--c-text3)}
.card{background:var(--c-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);margin-bottom:var(--sp-md);overflow:hidden;border:1px solid var(--c-border)}
.card-header{padding:var(--sp-md) 20px;border-bottom:1px solid #f1f5f9;font-size:15px;font-weight:600;display:flex;align-items:center;gap:8px}
.card-body{padding:20px}
.intro-box{background:var(--c-primary-bg);border:1px solid var(--c-primary-border);border-radius:var(--radius-md);padding:18px 20px;margin-bottom:16px}
.intro-box p{font-size:14px;line-height:1.9;color:var(--c-text2);margin:0}
.contact-list{display:flex;flex-direction:column;gap:10px}
.contact-item{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--c-text2);padding:10px 14px;background:#f8fafc;border-radius:10px;border:1px solid var(--c-border)}
.contact-item .tag{color:#fff;padding:3px 10px;border-radius:6px;font-size:11px;font-weight:600;white-space:nowrap}
.contact-item .tag.qq-group{background:var(--c-success)}
.contact-item .tag.qq{background:var(--c-primary)}
.contact-item .tag.wechat{background:var(--c-amber)}
.about-box{background:linear-gradient(135deg, #f8fafc, #f1f5f9);border:1px solid var(--c-border);border-radius:var(--radius-md);padding:18px 20px}
.about-box p{font-size:14px;line-height:1.9;color:var(--c-text2);margin:0 0 10px}
.about-box p:last-child{margin-bottom:0}
.qr-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.qr-item{text-align:center}
.qr-item .qr-img{width:100%;max-width:200px;min-width:200px;min-height:200px;border-radius:10px;border:1px solid var(--c-border);margin:0 auto;object-fit:contain;background:#f8fafc}
.qr-item .qr-img-error{width:200px;height:200px;border-radius:10px;border:1px solid var(--c-border);margin:0 auto;background:#f8fafc;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--c-text4);font-size:13px}
.qr-item .qr-label{font-size:13px;font-weight:600;margin-top:8px}
.qr-item .qr-desc{font-size:12px;color:var(--c-text3);margin-top:2px}

/* ====== Footer ====== */
.site-footer{border-top:1px solid var(--c-border);padding:var(--sp-lg) 0 var(--sp-xl);margin-top:var(--sp-2xl);background:var(--c-surface)}
.footer-inner{max-width:1100px;margin:0 auto;padding:0 var(--sp-lg);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-inner p{font-size:12px;color:var(--c-text4)}
.footer-links{display:flex;gap:16px}
.footer-links a{font-size:12px;color:var(--c-text4);transition:color .2s}
.footer-links a:hover{color:var(--c-primary)}

/* ====== Empty State ====== */
.empty-state{text-align:center;padding:60px 20px;background:var(--c-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}
.empty-state .empty-icon{font-size:48px;margin-bottom:12px;opacity:.5}
.empty-state p{font-size:16px;color:var(--c-text3)}
.empty-state .empty-sub{font-size:14px;color:var(--c-text4);margin-top:8px}

/* ====== Animations ====== */
@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.animate-in{animation:fadeInUp .5s var(--ease-out) both}
.delay-1{animation-delay:0.05s}.delay-2{animation-delay:0.10s}.delay-3{animation-delay:0.15s}
.delay-4{animation-delay:0.20s}.delay-5{animation-delay:0.25s}.delay-6{animation-delay:0.30s}

/* 科技感悬浮光效 */
.card-glow{position:relative;overflow:hidden}
.card-glow::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(circle at var(--mouse-x,50%) var(--mouse-y,50%), rgba(99,102,241,.06) 0%, transparent 60%);
  opacity:0;transition:opacity .3s var(--ease-out);
  pointer-events:none;z-index:1;
}
.card-glow:hover::before{opacity:1}

/* 链接下划线动画 */
.link-underline{position:relative}
.link-underline::after{
  content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;
  background:var(--c-primary);transition:width .3s var(--ease-out);
}
.link-underline:hover::after{width:100%}

/* 按钮缩放反馈 */
.btn:active{transform:scale(.97)}

/* 平滑滚动偏移（sticky header补偿） */
:target{scroll-margin-top:70px}

/* ====== Responsive: Tablet ====== */
@media (max-width:1023px){
  .articles-grid{grid-template-columns:repeat(2, 1fr)}
  .blog-layout{flex-direction:column}
  .blog-sidebar{width:100%}
  .hero-stats{gap:var(--sp-xl)}
  .fixed-buttons{right:10px}
  .fixed-btn{width:38px;height:38px}
}

/* ====== Responsive: Mobile ====== */
@media (max-width:767px){
  .site-nav{padding:0 var(--sp-md);height:52px}
  .nav-stats{display:none}
  .nav-links{
    position:fixed;top:0;right:-100%;
    width:280px;height:100vh;background:var(--c-surface);
    flex-direction:column;padding:72px var(--sp-lg) var(--sp-lg);gap:4px;
    box-shadow:var(--shadow-xl);transition:right .35s var(--ease-out);z-index:100;
  }
  .nav-links.open{right:0}
  .nav-links a{font-size:16px;padding:12px 16px;width:100%}
  .nav-links a.nav-tools{font-size:13px}
  .nav-toggle{display:flex}

  .hero-section{padding:var(--sp-2xl) var(--sp-md) var(--sp-xl)}
  .hero-title{font-size:28px}
  .hero-subtitle{font-size:15px}
  .hero-stats{gap:var(--sp-lg)}

  .articles-grid{grid-template-columns:1fr}
  .category-tabs{gap:6px}
  .category-tab{padding:5px 14px;font-size:12px}

  .app{padding:0 var(--sp-md) var(--sp-xl)}

  .fixed-buttons{right:8px;gap:8px}
  .fixed-btn{width:36px;height:36px}
  .fixed-btn .btn-tip{display:none}

  .article-detail{padding:var(--sp-lg) var(--sp-md)}
  .article-detail .article-header h1{font-size:22px}

  /* 表格响应式：水平滚动 */
  .article-detail .article-content table{
    display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;
    white-space:nowrap;
  }

  /* 代码块响应式 */
  .article-detail .article-content pre,
  .article-detail .article-content .highlight{
    max-width:calc(100vw - 32px);overflow-x:auto;-webkit-overflow-scrolling:touch;
    font-size:12px;
  }
  .article-detail .article-content code{font-size:12px;word-break:break-all}

  .qr-grid{grid-template-columns:1fr}
  .footer-inner{flex-direction:column;text-align:center}

  /* 搜索模态框移动端全屏 */
  .search-overlay{padding-top:0;align-items:stretch}
  .search-modal{max-width:100%;border-radius:0;height:100vh;display:flex;flex-direction:column}
  .search-results{max-height:none;flex:1}
  .search-modal-input{font-size:16px} /* 防止 iOS 缩放 */

  /* 触摸目标最小 44px */
  .pagination a,.filter-chip,.category-tab{padding:10px 16px}

  /* 手机端卡片间距缩小 */
  .articles-grid{gap:var(--sp-md)}
  .article-card{padding:var(--sp-md)}
}

/* ====== 超小屏 < 360px ====== */
@media (max-width:359px){
  .site-nav .logo{font-size:16px}
  .hero-title{font-size:22px}
  .hero-subtitle{font-size:13px}
  .hero-stats{gap:var(--sp-md);flex-wrap:wrap}
  .hero-stat .num{font-size:22px}
  .hero-stat .label{font-size:10px}
  .btn{padding:8px 16px;font-size:13px}
  .article-detail .article-header h1{font-size:18px}
  .article-detail .article-content{font-size:13px}
  .article-detail .article-content h2{font-size:17px}
  .article-detail .article-content h3{font-size:15px}
  .fixed-buttons{right:4px;gap:6px}
  .fixed-btn{width:32px;height:32px}
  .pw-gate .pw-input{flex-direction:column;width:100%}
  .pw-gate .pw-input input{width:100%}
}
.nav-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.3);z-index:99}
.nav-overlay.open{display:block}

/* ====== 面包屑导航 ====== */
.breadcrumb{max-width:var(--content-width,900px);margin:0 auto;padding:16px var(--sp-md) 0;display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-text4)}
.breadcrumb a{color:var(--c-text3);text-decoration:none;transition:color .2s}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .bc-sep{color:var(--c-border2)}

/* ====== 页面标题 ====== */
.page-title{font-size:20px;margin-bottom:16px;color:var(--c-text);display:flex;align-items:center;gap:10px}
.count-badge{font-size:13px;font-weight:400;color:var(--c-text3);background:var(--c-bg);padding:2px 10px;border-radius:10px}

/* ====== 侧边栏增强 ====== */
.sidebar-count{font-size:11px;color:var(--c-text4);margin-left:auto;background:var(--c-bg);padding:1px 7px;border-radius:8px}
.tag-cloud{display:flex;flex-wrap:wrap;gap:6px}
.tag-cloud a{display:inline-block;padding:3px 10px;font-size:13px;background:var(--c-bg);border:1px solid var(--c-border);border-radius:6px;color:var(--c-text2);text-decoration:none;transition:all .2s}
.tag-cloud a:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}
.archive-list{display:flex;flex-direction:column;gap:4px}
.archive-item{display:flex;align-items:center;justify-content:space-between;padding:6px 10px;font-size:13px;color:var(--c-text2);text-decoration:none;border-radius:6px;transition:all .15s}
.archive-item:hover{background:var(--c-bg)}
.archive-count{font-size:11px;color:var(--c-text4)}

/* ====== 文章信息列表 ====== */
.article-info-list .info-row{display:flex;align-items:center;gap:8px;padding:6px 0;font-size:13px;border-bottom:1px solid var(--c-border)}
.article-info-list .info-row:last-child{border-bottom:none}
.article-info-list .info-label{color:var(--c-text4);min-width:40px;font-weight:600}
.article-info-list a{color:var(--c-primary);text-decoration:none}
.meta-link{color:var(--c-primary);text-decoration:none;font-weight:500}
.meta-link:hover{text-decoration:underline}
.tag-link{display:inline-block;padding:2px 10px;font-size:12px;background:var(--c-primary-bg);border:1px solid var(--c-primary-border);border-radius:4px;color:var(--c-primary);text-decoration:none;margin-right:4px}

/* ====== TOC 目录 ====== */
.toc-list{list-style:none;padding:0;margin:0}
.toc-list li{margin-bottom:4px;font-size:13px;line-height:1.6}
.toc-level-1 a{font-weight:600}
.toc-level-2{padding-left:12px}
.toc-level-2 a{font-size:12px;color:var(--c-text3)}
.toc-list a{color:var(--c-text2);text-decoration:none;display:block;padding:2px 6px;border-radius:4px;transition:all .15s;border-left:2px solid transparent}
.toc-list a:hover,.toc-list a.active{color:var(--c-primary);border-left-color:var(--c-primary);background:var(--c-primary-bg)}

/* ====== 相关文章 ====== */
.related-section{margin-top:32px}
.rel-item{padding:10px 0;border-bottom:1px solid var(--c-border)}
.rel-item:last-child{border-bottom:none}
.rel-item a{color:var(--c-text);text-decoration:none;font-weight:600;font-size:14px;transition:color .2s}
.rel-item a:hover{color:var(--c-primary)}

/* ====== 搜索模态框 ====== */
.search-trigger{display:flex;align-items:center;gap:6px;padding:6px 12px;border:1px solid var(--c-border);border-radius:8px;background:var(--c-bg);color:var(--c-text4);cursor:pointer;font-size:12px;transition:all .2s;margin-left:6px;flex-shrink:0}
.search-trigger:hover{border-color:var(--c-primary);color:var(--c-primary)}
.search-trigger svg{width:15px;height:15px;flex-shrink:0}
.search-hint{display:none}
@media(min-width:768px){.search-hint{display:inline}}
.search-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:200;align-items:flex-start;justify-content:center;padding-top:15vh;backdrop-filter:blur(4px)}
.search-overlay.open{display:flex}
.search-modal{width:100%;max-width:550px;background:var(--c-white);border-radius:16px;box-shadow:var(--shadow-xl);overflow:hidden;animation:searchSlideIn .2s ease-out}
@keyframes searchSlideIn{from{opacity:0;transform:translateY(-12px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}
.search-input-wrap{display:flex;align-items:center;gap:10px;padding:14px 18px;border-bottom:1px solid var(--c-border)}
.search-modal-icon{width:20px;height:20px;color:var(--c-text4);flex-shrink:0}
.search-modal-input{flex:1;border:none;outline:none;font-size:16px;color:var(--c-text);background:transparent;padding:4px 0}
.search-modal-input::placeholder{color:var(--c-text4)}
.search-kbd{padding:2px 8px;font-size:11px;background:var(--c-bg);border:1px solid var(--c-border);border-radius:4px;color:var(--c-text4)}
.search-results{max-height:380px;overflow-y:auto;padding:8px}
.search-empty{text-align:center;color:var(--c-text4);padding:32px 16px;font-size:14px}
.search-item{display:block;padding:10px 14px;border-radius:8px;text-decoration:none;transition:background .15s}
.search-item:hover{background:var(--c-bg)}
.search-item .si-title{font-size:14px;color:var(--c-text);font-weight:600;margin-bottom:4px}
.search-item .si-title mark{background:var(--c-primary-bg);color:var(--c-primary);padding:0 2px;border-radius:2px}
.search-item .si-meta{font-size:11px;color:var(--c-text4)}
[data-theme="dark"] .search-modal{background:var(--c-surface)}
[data-theme="dark"] .search-modal-input{color:var(--c-text)}

/* ====== 性能优化 ====== */
/* 图片懒加载占位 */
img[loading]{opacity:0;transition:opacity .3s}
img[loading].loaded,img:not([loading]){opacity:1}
/* 非首屏延迟渲染 */
.lazy-render{content-visibility:auto;contain-intrinsic-size:0 200px}