:root{
  --ink:#1C2024; --charcoal:#3E454C; --cream:#F7F2E5; --canvas:#F3EFE4;
  --accent:#8FCEE6; --accent-600:#2E83A0; --accent-700:#236981; --accent-100:#DCEFF7;
  --grey:#8A9097; --line:#E4DECF; --white:#FFFFFF;
  --ok:#5BA88B; --warn:#E2A23B; --err:#D9534F;
  --maxw:1120px; --radius:12px;
  --shadow:0 1px 2px rgba(28,32,36,.04),0 6px 22px rgba(28,32,36,.05);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--canvas);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:var(--accent-600);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ---------- Header (slim, blog style) ---------- */
.site-header{background:var(--charcoal);border-bottom:3px solid var(--accent-600);position:sticky;top:0;z-index:60}
.header-inner{display:flex;align-items:center;gap:12px;height:58px}
.brand{display:flex;align-items:center;gap:9px;margin-right:auto}
.brand:hover{text-decoration:none}
.brand img{border-radius:8px;background:var(--cream)}
.brand-text{font-size:19px;font-weight:800;letter-spacing:-.01em;color:#fff}
.header-tag{color:#aeb4bb;font-size:13px}
.header-dl{display:inline-flex;align-items:center;gap:5px;padding:6px 13px;border-radius:999px;
  background:var(--accent-600);color:#fff;font-size:12.5px;font-weight:700;line-height:1}
.header-dl:hover{background:var(--accent);color:var(--charcoal);text-decoration:none}
.nav-toggle{display:none;align-items:center;justify-content:center;width:40px;height:40px;border:0;
  background:transparent;color:#fff;border-radius:9px;cursor:pointer;padding:0}
.nav-toggle.on{background:rgba(255,255,255,.14)}
.mobile-nav{display:none}

/* ---------- Blog two-column layout ---------- */
.layout{display:grid;grid-template-columns:1fr 300px;gap:34px;padding-top:30px;padding-bottom:10px;align-items:start}
.blog-main{min-width:0}
.blog-head{margin-bottom:20px}
.blog-head h1{font-size:26px;font-weight:800;color:var(--charcoal);letter-spacing:-.01em}
.blog-head p{color:var(--grey);font-size:14px;margin-top:4px}

/* Post list rows — each a white card */
.post-row{display:flex;gap:16px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;margin-bottom:14px;box-shadow:var(--shadow);transition:box-shadow .15s,transform .15s}
.post-row:hover{box-shadow:0 8px 24px rgba(28,32,36,.10);transform:translateY(-1px)}
.post-thumb{flex:0 0 168px}
.post-thumb img{width:168px;height:126px;object-fit:cover;border-radius:10px;border:1px solid var(--line);background:var(--accent-100)}
.post-row-body{min-width:0}
.post-row-body h2{font-size:19px;font-weight:700;line-height:1.35;margin-bottom:6px}
.post-row-body h2 a{color:var(--charcoal)}
.post-row-body h2 a:hover{color:var(--accent-600);text-decoration:none}
.post-meta{font-size:12.5px;color:var(--grey);margin-bottom:8px;display:flex;flex-wrap:wrap;gap:12px}
.post-meta .cat{color:var(--accent-700);font-weight:700}
.post-excerpt{font-size:14px;color:#555b62;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.readmore{display:inline-block;margin-top:8px;font-size:13px;font-weight:700}

/* ---------- Sidebar ---------- */
.sidebar{position:sticky;top:80px;display:flex;flex-direction:column;gap:18px}
.widget{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:18px 18px;box-shadow:var(--shadow)}
.widget h3{font-size:13px;text-transform:uppercase;letter-spacing:.07em;color:var(--charcoal);
  margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.widget p{font-size:13.5px;color:#555b62;margin-bottom:10px}
.cat-list{list-style:none}
.cat-list li{margin:0}
.cat-list a{display:flex;justify-content:space-between;align-items:center;padding:8px 6px;border-radius:8px;
  font-size:14px;color:var(--charcoal);font-weight:600}
.cat-list a:hover{background:var(--accent-100);color:var(--accent-700);text-decoration:none}
.cat-list a.active{background:var(--accent-600);color:#fff}
.cat-list .cnt{font-size:12px;color:var(--grey);font-weight:600}
.cat-list a.active .cnt{color:#dff}
/* Collapsible Categories — menu on mobile, static on desktop */
.cat-widget>summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;text-transform:uppercase;letter-spacing:.07em;color:var(--charcoal);font-weight:700;
  padding-bottom:12px;border-bottom:1px solid var(--line)}
.cat-widget>summary::-webkit-details-marker{display:none}
.cat-widget[open]>summary{margin-bottom:12px}
.cat-widget .chev{color:var(--grey);transition:transform .2s;display:inline-flex}
.cat-widget[open] .chev{transform:rotate(180deg)}
@media(min-width:861px){
  .cat-widget>summary{cursor:default;pointer-events:none}
  .cat-widget .chev{display:none}
}
.widget-dl{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:999px;
  background:var(--accent-600);color:#fff;font-size:13.5px;font-weight:700}
.widget-dl:hover{background:var(--accent-700);color:#fff;text-decoration:none}
.mini-thumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.mini-thumbs img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:7px;border:1px solid var(--line)}

/* ---------- Post detail ---------- */
.article{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:24px 28px;box-shadow:var(--shadow)}
.article-hero{width:100%;max-height:460px;object-fit:cover;border-radius:var(--radius);border:1px solid var(--line);background:var(--accent-100);margin-bottom:18px}
.breadcrumb{font-size:12.5px;color:var(--grey);margin-bottom:12px}
.breadcrumb a{color:var(--grey)}
.article h1{font-size:28px;font-weight:800;color:var(--charcoal);line-height:1.22;margin-bottom:8px}
.article .lead{font-size:16px;color:#4b5158;margin:6px 0 14px}
.spec{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0}
.spec div{background:var(--accent-100);border:1px solid #cbe6f1;border-radius:10px;padding:9px 13px;font-size:13.5px}
.spec b{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--grey);font-weight:700}
.tagrow .chip,.chip{display:inline-block;font-size:11.5px;font-weight:700;color:var(--accent-700);
  background:var(--accent-100);padding:4px 10px;border-radius:999px;margin:0 6px 6px 0}
.article-body{margin-top:18px}
.article-body h2{font-size:19px;color:var(--charcoal);margin:22px 0 10px}
.article-body p{font-size:15.5px;color:#3c424a;margin-bottom:14px}
.inline-cta{background:var(--accent-100);border:1px solid #cbe6f1;border-radius:var(--radius);padding:16px 18px;margin:20px 0}
.inline-cta h4{color:var(--accent-700);font-size:15px;margin-bottom:4px}
.inline-cta p{font-size:13.5px;color:#4b5158;margin-bottom:10px}

/* Comments */
.comments{margin-top:24px}
.comments>h2{font-size:18px;color:var(--charcoal);margin-bottom:6px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.thread{padding:6px 0}
.comment{display:flex;gap:11px;padding:6px 0}
.comment .av{flex:0 0 36px;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;color:#fff;text-transform:uppercase}
.comment .cbody{min-width:0;flex:1}
.comment .who{font-weight:700;color:var(--charcoal);font-size:13.5px}
.comment .badge{display:inline-block;font-size:10px;font-weight:700;color:#fff;background:var(--accent-600);padding:1px 6px;border-radius:999px;margin-left:6px;vertical-align:middle}
.comment .when{color:var(--grey);font-size:12px;margin-left:8px}
.comment .ctext{font-size:14px;color:#3c424a;margin-top:3px}
.comment .ctext .mention{color:var(--accent-700);font-weight:700}
.replies{margin:4px 0 2px 12px;padding-left:14px;border-left:2px solid var(--accent-100)}
.replies .comment{padding:6px 0}

/* Image fallback placeholder */
img.img-fallback{object-fit:cover;background:linear-gradient(150deg,var(--accent-100),var(--cream))}

/* 404 / error — centered white card */
.nf-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);width:100%;text-align:center;padding:60px 34px}
.more-head{font-size:18px;color:var(--charcoal);font-weight:700;margin:30px 2px 14px}
.nf-code{font-size:84px;line-height:1;font-weight:800;color:var(--accent-600);letter-spacing:-2px}
.nf-title{font-size:22px;color:var(--charcoal);margin:14px 0 8px;font-weight:700}
.nf-msg{color:var(--grey);font-size:15px;margin:0 0 26px;line-height:1.6}
.nf-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.nf-btn{display:inline-flex;align-items:center;gap:6px;padding:9px 18px;border-radius:999px;font-size:14px;font-weight:700;border:1px solid var(--accent-600);background:var(--accent-600);color:#fff}
.nf-btn:hover{background:var(--accent-700);border-color:var(--accent-700);color:#fff;text-decoration:none}
.nf-btn.ghost{background:var(--white);color:var(--accent-700)}
.nf-btn.ghost:hover{background:var(--accent-100);color:var(--accent-700)}
@media(max-width:560px){.nf-card{padding:36px 20px}.nf-code{font-size:68px}}

/* Pagination */
.pager{display:flex;gap:8px;flex-wrap:wrap;margin:26px 0 6px}
.pager a,.pager span{padding:8px 14px;border-radius:9px;border:1px solid var(--line);font-size:14px;font-weight:600;color:var(--charcoal);background:var(--white)}
.pager .cur{background:var(--accent-600);color:#fff;border-color:var(--accent-600)}
.pager a:hover{text-decoration:none;border-color:var(--accent-600)}

/* Policy / generic prose */
.page-hero{max-width:var(--maxw);margin:0 auto;padding:30px 22px 6px}
.page-hero h1{font-size:28px;font-weight:800;color:var(--charcoal)}
.page-hero p{color:var(--grey);max-width:620px;margin-top:6px}
.prose-card,.policy-content{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px 34px;margin:14px 0 40px;box-shadow:var(--shadow)}
.prose-card h2,.policy-content h2{font-size:19px;color:var(--charcoal);margin:24px 0 10px}
.prose-card h2:first-child,.policy-content h2:first-child{margin-top:0}
.prose-card h3,.policy-content h3{font-size:15px;color:var(--charcoal);margin:16px 0 8px}
.prose-card p,.prose-card li,.policy-content p,.policy-content li{font-size:14.5px;color:#3c424a;margin-bottom:10px}
.prose-card ul,.policy-content ul{padding-left:20px;margin-bottom:12px}
.policy-content a{color:var(--accent-600);text-decoration:underline}
.last-updated{font-size:12.5px;color:var(--grey);margin-top:26px;padding-top:14px;border-top:1px solid var(--line)}

/* Footer */
.site-footer{background:var(--charcoal);color:#cdd2d8;margin-top:54px;padding:36px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:36px}
.site-footer .brand-text{color:#fff}
.footer-brand p{font-size:13px;color:#aab0b8;max-width:300px;margin-top:10px}
.footer-col h4{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:#8b929b;margin-bottom:12px}
.footer-col a{display:block;font-size:14px;color:#cdd2d8;margin-bottom:8px}
.footer-col a:hover{color:var(--accent);text-decoration:none}
.footer-bottom{margin-top:30px;padding-top:16px;border-top:1px solid #4b525a;display:flex;justify-content:space-between;font-size:12.5px;color:#8b929b}

/* ===================== Responsive / mobile-first ===================== */
@media(max-width:860px){
  .container{padding:0 10px}

  /* header: hamburger + icon-only download near logo */
  .nav-toggle{display:inline-flex}
  .header-tag{display:none}
  .header-dl{padding:8px 10px}
  .header-dl .dl-txt{display:none}

  /* slide-down mobile navigation */
  .mobile-nav{display:block;max-height:0;overflow:hidden;background:#fff;
    transition:max-height .28s ease;box-shadow:0 10px 24px rgba(28,32,36,.12)}
  .mobile-nav.open{max-height:600px}
  .mobile-nav>a{display:block;padding:14px 16px;color:var(--charcoal);font-weight:600;border-bottom:1px solid var(--line)}
  .mobile-nav>a:hover{text-decoration:none}
  .mobile-nav>a.cur{color:var(--accent-700)}
  .mnav-label{padding:13px 16px 7px;font-size:11px;text-transform:uppercase;letter-spacing:.07em;color:var(--grey);font-weight:700}
  .mnav-cats{display:flex;flex-wrap:wrap;gap:8px;padding:0 16px 14px;border-bottom:1px solid var(--line)}
  .mnav-cats a{border-radius:999px;padding:7px 14px;font-size:13.5px;font-weight:600;color:var(--accent-700);background:var(--accent-100)}
  .mnav-cats a:hover{text-decoration:none}
  .mnav-dl{display:flex;align-items:center;justify-content:center;gap:7px;margin:14px 16px;padding:13px;
    border-radius:999px;background:var(--accent-600);color:#fff!important;font-weight:700;border-bottom:0!important}
  .mnav-dl:hover{text-decoration:none}

  /* single column; categories live in the menu now, keep Recent below */
  .layout{grid-template-columns:1fr;gap:22px;padding-top:18px;padding-bottom:4px}
  .sidebar{position:static}
  .cat-widget{display:none}

  /* friendlier section intro */
  .blog-head{margin-bottom:14px;padding-bottom:14px;border-bottom:1px solid var(--line)}
  .blog-head h1{font-size:22px}
  .blog-head p{font-size:13px}

  /* readable article + comments */
  .article{padding:16px 14px}
  .article h1{font-size:23px}
  .article-hero{max-height:300px}
  .replies{margin-left:8px;padding-left:11px}

  .footer-grid{grid-template-columns:1fr;gap:22px}
  .footer-bottom{flex-direction:column;gap:6px}
  .prose-card,.policy-content{padding:22px 16px}
  .page-hero{padding:18px 10px 4px}
  .page-hero h1{font-size:22px}
}

@media(max-width:440px){
  .post-row{gap:13px;padding:13px}
  .post-thumb{flex-basis:100px}
  .post-thumb img{width:100px;height:78px}
  .post-row-body h2{font-size:15.5px;line-height:1.3}
  .post-excerpt{-webkit-line-clamp:3}
  .post-meta{gap:9px;font-size:12px}
  .brand-text{font-size:17px}
  .blog-head h1{font-size:20px}
}

/* ---- user center + clickable authors ---- */
.uavatar{display:inline-block;border-radius:50%;object-fit:cover;vertical-align:middle;text-align:center;color:#fff;font-weight:700;overflow:hidden}
.comment .av-link{flex:none;text-decoration:none}
a.who{text-decoration:none}
a.who:hover,.author-link:hover{text-decoration:underline}
.author-link{color:var(--accent-700);font-weight:600}
.post-author{display:inline-flex;align-items:center;gap:8px;margin:8px 0 2px;color:var(--charcoal);font-weight:600;text-decoration:none}
.post-author:hover{color:var(--accent-700);text-decoration:none}
.post-author .uavatar{box-shadow:0 0 0 1px var(--line)}
.user-hero{display:flex;align-items:center;gap:16px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-bottom:14px}
.user-hero .uavatar{flex:none;box-shadow:0 0 0 1px var(--line)}
.user-hero-info h1{font-size:22px;margin:0 0 4px;color:var(--ink)}
.user-hero-meta{font-size:13px;color:var(--grey)}
.user-stats{display:flex;gap:18px;margin-top:8px;font-size:13px;color:var(--charcoal);flex-wrap:wrap}
.user-stats b{color:var(--ink)}
.user-tabs{display:flex;gap:8px;margin-bottom:14px;flex-wrap:wrap}
.user-tabs a{padding:8px 14px;border-radius:9px;border:1px solid var(--line);background:var(--white);font-size:14px;font-weight:600;color:var(--charcoal)}
.user-tabs a:hover{text-decoration:none;border-color:var(--accent-600)}
.user-tabs a.active{background:var(--accent-600);color:#fff;border-color:var(--accent-600)}

/* ---- SEO additions: subtle page H1, post image gallery, FAQ ---- */
.page-h1{font-size:13px;font-weight:600;color:var(--grey);letter-spacing:.01em;margin:0 0 16px;padding-left:10px;border-left:3px solid var(--accent-100)}
.post-gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:8px;margin:14px 0}
.post-gallery img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:10px;border:1px solid var(--line)}
.faq{margin-top:24px}
.faq>h2{font-size:18px;color:var(--charcoal);margin-bottom:8px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);padding:10px 0}
.faq summary{cursor:pointer;font-weight:600;color:var(--charcoal);font-size:14.5px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"+ ";color:var(--accent-600);font-weight:700}
.faq details[open] summary::before{content:"– "}
.faq details p{font-size:14px;color:#4b5158;margin-top:8px}

/* ---- language switcher (collapsed dropdown in header) ---- */
.lang-switch{position:relative;margin-right:6px}
.lang-switch>summary{list-style:none;cursor:pointer;color:#cfd4da;font-size:12.5px;display:flex;align-items:center;gap:4px;padding:5px 9px;border-radius:8px;white-space:nowrap}
.lang-switch>summary::-webkit-details-marker{display:none}
.lang-switch>summary:hover,.lang-switch[open]>summary{background:rgba(255,255,255,.12);color:#fff}
.lang-switch[open]>summary svg{transform:rotate(180deg)}
.lang-switch>summary svg{transition:transform .2s}
.lang-switch .lang-menu{position:absolute;top:calc(100% + 6px);right:0;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:6px;min-width:140px;z-index:70;display:flex;flex-direction:column;gap:2px}
.lang-switch .lang-menu a{font-size:13px;color:var(--charcoal);padding:7px 10px;border-radius:7px;white-space:nowrap}
.lang-switch .lang-menu a:hover{background:var(--accent-100);color:var(--accent-700);text-decoration:none}
.lang-switch .lang-menu a.cur{background:var(--accent-600);color:#fff;font-weight:700}
@media(max-width:760px){.lang-switch{display:none}}
/* footer language guide */
.footer-langs{display:flex;flex-wrap:wrap;gap:6px 14px;padding:12px 0;border-top:1px solid rgba(255,255,255,.08)}
.footer-langs a{color:#aeb4bb;font-size:12.5px}
.footer-langs a:hover{color:#fff;text-decoration:none}
.footer-langs a.cur{color:#fff;font-weight:700}