/*
Theme Name: YunFan Cloud
Theme URI: https://wiki.ydbee.cn/
Author: 蜜蜂云帆
Description: 面向云计算技术知识库的轻量高性能主题，内置 SEO/GEO 友好结构、目录导航、FAQ 折叠与暗色模式。
Version: 1.0.0
Requires at least: 6.0
Tested up to: 7.1
Requires PHP: 7.4
License: GNU General Public License v2 or later
Text Domain: yunfan
*/

:root{
  --brand:#2f6bff; --brand-2:#22d3ee; --accent:#7c5cff;
  --ink:#0c1533; --ink-2:#1c2748; --muted:#5b6785;
  --line:#e6ecf8; --bg:#f5f8ff; --surface:#ffffff;
  --dark:#070d1c; --dark-2:#0d1730; --ok:#12b886;
  --radius:16px; --radius-sm:10px;
  --shadow:0 10px 30px -18px rgba(16,35,90,.45);
  --shadow-lg:0 28px 60px -30px rgba(16,35,90,.5);
  --max:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--accent)}
h1,h2,h3,h4,h5{line-height:1.3;margin:0 0 .6em;font-weight:700;letter-spacing:-.01em}
p{margin:0 0 1.1em}
ul,ol{padding-left:1.4em}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:12px;top:12px;background:#fff;padding:10px 16px;border-radius:8px;z-index:999}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.86);backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line)}
.site-header .container{display:flex;align-items:center;gap:24px;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--ink);letter-spacing:-.02em}
.brand:hover{color:var(--ink)}
.brand-mark{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:grid;place-items:center;box-shadow:0 6px 16px -8px rgba(47,107,255,.9)}
.brand-mark svg{width:19px;height:19px;fill:#fff}
.brand small{display:block;font-size:11px;color:var(--muted);font-weight:500;letter-spacing:.08em}
.main-nav{margin-left:8px;flex:1}
.main-nav ul{display:flex;gap:4px;list-style:none;margin:0;padding:0}
.main-nav a{display:block;padding:8px 12px;border-radius:9px;color:var(--ink-2);font-size:14.5px;font-weight:600}
.main-nav a:hover{background:#eef3ff;color:var(--brand)}
.main-nav .current-menu-item>a{background:#eef3ff;color:var(--brand)}
.header-actions{display:flex;align-items:center;gap:10px}
.header-search{position:relative}
.header-search input{width:190px;padding:8px 12px 8px 34px;border:1px solid var(--line);border-radius:999px;background:#f7f9ff;font-size:13.5px;color:var(--ink);outline:none;transition:.2s}
.header-search input:focus{border-color:var(--brand);background:#fff;width:230px;box-shadow:0 0 0 4px rgba(47,107,255,.1)}
.header-search svg{position:absolute;left:11px;top:50%;transform:translateY(-50%);width:15px;height:15px;fill:var(--muted)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:9px;padding:7px 9px;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);margin:3px 0;border-radius:2px}
.theme-toggle{background:none;border:1px solid var(--line);border-radius:999px;width:36px;height:36px;cursor:pointer;font-size:15px;line-height:1;display:grid;place-items:center;color:var(--ink-2)}
.theme-toggle:hover{border-color:var(--brand);color:var(--brand)}

/* hero */
.hero{position:relative;overflow:hidden;color:#eaf1ff;background:radial-gradient(1200px 480px at 15% -10%,rgba(47,107,255,.55),transparent 60%),radial-gradient(900px 420px at 88% 0%,rgba(34,211,238,.35),transparent 55%),linear-gradient(160deg,#070d1c 0%,#0c1730 55%,#111f43 100%)}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:56px 56px;-webkit-mask-image:radial-gradient(circle at 50% 0%,#000 30%,transparent 78%);mask-image:radial-gradient(circle at 50% 0%,#000 30%,transparent 78%)}
.hero-inner{position:relative;z-index:2;padding:76px 0 66px;max-width:840px}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:#9ec1ff;border:1px solid rgba(158,193,255,.32);background:rgba(47,107,255,.16);padding:6px 14px;border-radius:999px;margin-bottom:22px}
.hero-eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 12px var(--brand-2);display:inline-block}
.hero h1{font-size:clamp(30px,4.6vw,50px);line-height:1.16;margin:0 0 18px;color:#fff;letter-spacing:-.02em}
.hero h1 em{font-style:normal;background:linear-gradient(100deg,#67e8f9,#8ab4ff 55%,#c4b5fd);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lede{font-size:17px;color:#b9c9e8;max-width:660px;margin:0 0 30px}
.hero-search{display:flex;gap:10px;max-width:560px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);padding:7px;border-radius:14px;backdrop-filter:blur(8px)}
.hero-search input{flex:1;background:transparent;border:0;color:#fff;padding:11px 14px;font-size:15px;outline:none;min-width:0}
.hero-search input::placeholder{color:#93a7cc}
.hero-search button{background:linear-gradient(135deg,var(--brand),#37c6f0);border:0;color:#fff;font-weight:700;padding:11px 22px;border-radius:10px;cursor:pointer;font-size:14.5px}
.hero-search button:hover{filter:brightness(1.08)}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}
.hero-tags a{font-size:13.5px;color:#c3d4f2;border:1px solid rgba(255,255,255,.18);padding:6px 13px;border-radius:999px;background:rgba(255,255,255,.05)}
.hero-tags a:hover{background:rgba(47,107,255,.28);color:#fff;border-color:rgba(120,170,255,.6)}
.hero-stats{display:flex;flex-wrap:wrap;gap:44px;margin-top:44px;padding-top:26px;border-top:1px solid rgba(255,255,255,.12)}
.hero-stats div{display:flex;flex-direction:column;gap:2px}
.hero-stats b{font-size:24px;color:#fff;font-weight:800;letter-spacing:-.02em}
.hero-stats span{font-size:12.5px;color:#8ea4c9;letter-spacing:.06em}

/* sections */
.section{padding:64px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:30px}
.section-head h2{font-size:26px;margin:0;letter-spacing:-.02em}
.section-head p{margin:6px 0 0;color:var(--muted);font-size:14.5px}
.section-head .more{font-size:14px;font-weight:600;white-space:nowrap}

/* category cards */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px}
.cat-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;transition:.22s;box-shadow:var(--shadow)}
.cat-card:hover{transform:translateY(-3px);border-color:#c9d9ff;box-shadow:var(--shadow-lg)}
.cat-card .ico{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;font-size:19px;margin-bottom:14px;background:linear-gradient(135deg,#e8f0ff,#eef9ff);color:var(--brand)}
.cat-card h3{font-size:16.5px;margin:0 0 6px}
.cat-card p{margin:0;font-size:13.5px;color:var(--muted);line-height:1.62}
.cat-card .count{display:inline-block;margin-top:12px;font-size:12px;font-weight:700;color:var(--brand);background:#eef3ff;padding:3px 10px;border-radius:999px}

/* post cards */
.post-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:22px}
.post-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:.22s;box-shadow:var(--shadow)}
.post-card:hover{transform:translateY(-3px);border-color:#c9d9ff;box-shadow:var(--shadow-lg)}
.post-card .thumb{aspect-ratio:16/9;background:linear-gradient(135deg,#1b2c55,#2f6bff 60%,#22d3ee);position:relative;overflow:hidden}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:.4s}
.post-card:hover .thumb img{transform:scale(1.04)}
.post-card .thumb .tag{position:absolute;left:12px;top:12px;background:rgba(7,13,28,.72);color:#dbe8ff;font-size:11.5px;font-weight:600;padding:4px 10px;border-radius:999px;backdrop-filter:blur(4px)}
.post-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.post-card h3{font-size:17px;line-height:1.45;margin:0 0 9px}
.post-card h3 a{color:var(--ink)}
.post-card h3 a:hover{color:var(--brand)}
.post-card .excerpt{font-size:13.8px;color:var(--muted);line-height:1.68;margin:0 0 16px;flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-card .meta{display:flex;align-items:center;gap:12px;font-size:12.5px;color:#8492b0;border-top:1px solid var(--line);padding-top:13px}
.post-card .meta .dot{width:3px;height:3px;border-radius:50%;background:#c3cde0;display:inline-block}

/* layout */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:36px;align-items:start;padding:44px 0 64px}
.sidebar{position:sticky;top:84px;display:flex;flex-direction:column;gap:20px}
.widget{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.widget h2,.widget .widget-title{font-size:14px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);margin:0 0 14px;font-weight:700}
.widget ul{list-style:none;margin:0;padding:0}
.widget li{display:flex;gap:10px;align-items:flex-start;padding:10px 0;border-bottom:1px dashed var(--line);font-size:14px}
.widget li:last-child{border-bottom:0;padding-bottom:0}
.widget li a{color:var(--ink-2);font-weight:600;line-height:1.5}
.widget li a:hover{color:var(--brand)}
.widget .num{flex:none;width:20px;height:20px;border-radius:6px;background:#eef3ff;color:var(--brand);font-size:11.5px;font-weight:800;display:grid;place-items:center;margin-top:2px}
.widget-tags{display:flex;flex-wrap:wrap;gap:8px}
.widget-tags a{font-size:12.5px;background:#f2f6ff;color:var(--ink-2);padding:5px 11px;border-radius:999px}
.widget-tags a:hover{background:var(--brand);color:#fff}

/* article */
.breadcrumb{font-size:13px;color:#8492b0;margin-bottom:18px;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.article{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:44px 48px;box-shadow:var(--shadow)}
.article-header{margin-bottom:30px;padding-bottom:24px;border-bottom:1px solid var(--line)}
.article-header .kicker{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;color:var(--brand);background:#eef3ff;padding:5px 12px;border-radius:999px;margin-bottom:16px}
.article-header h1{font-size:clamp(26px,3.2vw,36px);line-height:1.28;margin:0 0 16px;letter-spacing:-.02em}
.article-meta{display:flex;flex-wrap:wrap;gap:16px;font-size:13px;color:#8492b0}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.entry-content{font-size:16.6px;line-height:1.95;color:#1a2440}
.entry-content h2{font-size:23px;margin:2.1em 0 .8em;padding-left:14px;position:relative;color:var(--ink)}
.entry-content h2::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:4px;background:linear-gradient(180deg,var(--brand),var(--brand-2))}
.entry-content h3{font-size:18.5px;margin:1.7em 0 .6em;color:var(--ink-2)}
.entry-content h4{font-size:16.5px;margin:1.4em 0 .5em}
.entry-content p{margin:0 0 1.15em}
.entry-content a{border-bottom:1px solid rgba(47,107,255,.35)}
.entry-content a:hover{border-bottom-color:var(--accent)}
.entry-content ul,.entry-content ol{margin:0 0 1.2em}
.entry-content li{margin-bottom:.5em}
.entry-content blockquote{margin:1.6em 0;padding:18px 22px;border-left:4px solid var(--brand);background:linear-gradient(90deg,#eef3ff,rgba(238,243,255,0));border-radius:0 12px 12px 0;color:#28375c;font-size:15.8px}
.entry-content blockquote p:last-child{margin-bottom:0}
.entry-content table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:14.6px;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.entry-content thead th{background:#f2f6ff;color:var(--ink-2);font-weight:700;text-align:left}
.entry-content th,.entry-content td{padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.entry-content tbody tr:last-child td{border-bottom:0}
.entry-content tbody tr:hover{background:#fafcff}
.entry-content code{background:#f1f4fb;padding:2px 6px;border-radius:5px;font-size:.9em;color:#c0348a;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.entry-content pre{background:#0b1226;color:#d5e2ff;padding:18px 20px;border-radius:12px;overflow:auto;font-size:13.8px;line-height:1.7;margin:1.5em 0}
.entry-content pre code{background:none;color:inherit;padding:0}
.entry-content img{border-radius:12px;margin:1.4em auto}
.entry-content hr{border:0;border-top:1px solid var(--line);margin:2em 0}

.faq-item{border:1px solid var(--line);border-radius:12px;margin:0 0 12px;overflow:hidden;background:#fbfcff}
.entry-content .faq-q,.faq-q{font-size:16px !important;margin:0 !important;padding:15px 46px 15px 18px;cursor:pointer;position:relative;color:var(--ink-2);font-weight:700}
.faq-q::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);font-size:20px;font-weight:400;color:var(--brand);transition:.2s}
.faq-item.open .faq-q::after{content:"\2013"}
.faq-a{display:none;padding:0 18px 16px;font-size:15.2px;color:#31405f}
.faq-item.open .faq-a{display:block}

.toc{background:#fbfcff;border:1px solid var(--line);border-left:3px solid var(--brand);border-radius:10px;padding:16px 20px;margin:0 0 28px}
.toc strong{display:block;font-size:13px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.toc ol{list-style:none;margin:0;padding:0}
.toc li{margin:0;font-size:14px;line-height:1.6}
.toc li a{color:var(--ink-2);display:block;padding:4px 0;border-bottom:0}
.toc li a:hover{color:var(--brand)}
.toc li.toc-h3{padding-left:16px;font-size:13.4px}
.toc li.toc-h3 a{color:var(--muted)}

.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:32px;padding-top:22px;border-top:1px solid var(--line)}
.article-tags a{font-size:12.5px;background:#f2f6ff;color:var(--ink-2);padding:5px 12px;border-radius:999px;border:0}
.article-tags a:hover{background:var(--brand);color:#fff}

.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:26px}
.post-nav a{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px 18px;display:block;transition:.2s}
.post-nav a:hover{border-color:#c9d9ff;box-shadow:var(--shadow)}
.post-nav small{display:block;font-size:12px;color:#8492b0;margin-bottom:5px}
.post-nav strong{font-size:14.5px;color:var(--ink);font-weight:600;line-height:1.5}
.post-nav .next{text-align:right}

.related{margin-top:40px}
.related h2{font-size:19px;margin:0 0 16px}

.pagination{display:flex;justify-content:center;gap:8px;margin:40px 0 0;flex-wrap:wrap}
.pagination .page-numbers{display:inline-grid;place-items:center;min-width:38px;height:38px;padding:0 12px;border-radius:10px;background:var(--surface);border:1px solid var(--line);color:var(--ink-2);font-size:14px;font-weight:600}
.pagination .page-numbers.current,.pagination .page-numbers:hover{background:var(--brand);color:#fff;border-color:var(--brand)}

.cta-band{position:relative;overflow:hidden;border-radius:22px;padding:48px 44px;color:#e8f0ff;background:radial-gradient(700px 300px at 10% 0%,rgba(47,107,255,.6),transparent 60%),linear-gradient(135deg,#0b1428,#16265a)}
.cta-band h2{font-size:26px;color:#fff;margin:0 0 10px}
.cta-band p{color:#b9c9e8;margin:0 0 22px;max-width:600px}
.cta-band .btn{display:inline-block;background:#fff;color:#12224a;font-weight:700;padding:12px 24px;border-radius:11px;font-size:14.5px}
.cta-band .btn:hover{background:#dbe8ff}

.site-footer{background:var(--dark);color:#93a6c9;margin-top:20px;padding:56px 0 26px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.09)}
.site-footer h3{font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:#c5d5f0;margin:0 0 14px}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:9px}
.site-footer a{color:#93a6c9}
.site-footer a:hover{color:#fff}
.site-footer .about{max-width:320px;line-height:1.75}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-top:22px;font-size:12.8px;color:#63779c}

.empty-state{background:var(--surface);border:1px dashed #cdd9f0;border-radius:var(--radius);padding:56px 24px;text-align:center;color:var(--muted)}
.search-form{display:flex;gap:8px}
.search-form input{flex:1;padding:10px 14px;border:1px solid var(--line);border-radius:10px;font-size:14px;outline:none;background:#fbfcff}
.search-form input:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(47,107,255,.1)}
.search-form button{background:var(--brand);color:#fff;border:0;border-radius:10px;padding:10px 18px;font-weight:600;cursor:pointer}
.screen-reader-text{position:absolute !important;width:1px;height:1px;overflow:hidden;clip:rect(1px,1px,1px,1px);white-space:nowrap}

/* dark */
body.dark{--bg:#070c19;--surface:#0e1730;--ink:#e8eefc;--ink-2:#c6d3ee;--muted:#8fa1c4;--line:#1e2b4a;--shadow:0 10px 30px -18px rgba(0,0,0,.8);--shadow-lg:0 28px 60px -30px rgba(0,0,0,.9)}
body.dark .site-header{background:rgba(9,15,30,.85)}
body.dark .main-nav a{color:#c6d3ee}
body.dark .main-nav a:hover,body.dark .main-nav .current-menu-item>a{background:#152343;color:#fff}
body.dark .header-search input{background:#101a33;border-color:#1e2b4a;color:#e8eefc}
body.dark .cat-card .ico{background:linear-gradient(135deg,#152343,#0f2136);color:#7fb0ff}
body.dark .cat-card .count{background:#152343;color:#8ab4ff}
body.dark .entry-content{color:#cdd9f2}
body.dark .entry-content h2,body.dark .entry-content h3,body.dark .entry-content h4{color:#eaf1ff}
body.dark .entry-content thead th{background:#152343;color:#dbe6ff}
body.dark .entry-content tbody tr:hover{background:#132039}
body.dark .entry-content code{background:#152343;color:#ff9ecb}
body.dark .entry-content blockquote{background:linear-gradient(90deg,#132039,rgba(19,32,57,0));color:#c6d3ee}
body.dark .toc,body.dark .faq-item{background:#101a33}
body.dark .faq-a{color:#b9c8e6}
body.dark .faq-q{color:#e8eefc}
body.dark .widget-tags a,body.dark .article-tags a{background:#152343;color:#c6d3ee}
body.dark .pagination .page-numbers{background:#0e1730;border-color:#1e2b4a;color:#c6d3ee}
body.dark .article-tags{border-color:#1e2b4a}
body.dark .nav-toggle span{background:#e8eefc}

@media (max-width:1024px){
  .layout{grid-template-columns:1fr}
  .sidebar{position:static;flex-direction:row;flex-wrap:wrap}
  .sidebar .widget{flex:1 1 280px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:820px){
  .main-nav{display:none;position:absolute;left:0;right:0;top:66px;background:#fff;border-bottom:1px solid var(--line);padding:10px 16px;box-shadow:var(--shadow)}
  body.dark .main-nav{background:#0e1730}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;gap:0}
  .main-nav a{padding:11px 8px;border-radius:8px}
  .nav-toggle{display:block}
  .header-search input{width:150px}
  .header-search input:focus{width:170px}
  .hero-inner{padding:52px 0 46px}
  .hero-stats{gap:26px}
  .article{padding:28px 22px}
  .section{padding:44px 0}
  .post-grid{grid-template-columns:1fr}
  .post-nav{grid-template-columns:1fr}
  .post-nav .next{text-align:left}
  .cta-band{padding:32px 24px}
}
@media (max-width:520px){
  .hero-stats b{font-size:20px}
  .header-search{display:none}
  .footer-grid{grid-template-columns:1fr}
  .article-header h1{font-size:24px}
}