:root{
  --bg:#f3f7fb; --card:#ffffff; --line:#dde7f2; --text:#1e293b; --muted:#64748b;
  --primary:#2563eb; --primary-dark:#1d4ed8; --dark:#0f172a;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.65}
a{text-decoration:none;color:inherit}
img,video{max-width:100%;display:block}
.wrap{width:min(1180px,92%);margin:0 auto}
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.topbar{display:flex;align-items:center;gap:18px;min-height:72px}
.brand{font-size:24px;font-weight:800;color:var(--dark)}
.nav{display:flex;gap:16px;flex-wrap:wrap}
.nav a{color:var(--muted)}
.nav a:hover,.readmore,.category-tag{color:var(--primary)}
.searchbar{margin-left:auto;display:flex;gap:8px}
.searchbar input,.admin-form input,.admin-form textarea,.admin-form select,.comment-form input,.comment-form textarea{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:#fff;font-size:15px}
.searchbar button,.btn-primary,.admin-form button,.comment-form button,.toolbar-btn{border:none;background:var(--primary);color:#fff;padding:12px 16px;border-radius:12px;cursor:pointer;font-weight:700}
.searchbar button:hover,.btn-primary:hover,.admin-form button:hover,.comment-form button:hover,.toolbar-btn:hover{background:var(--primary-dark)}
.hero{padding:24px 0 10px}
.hero-inner{background:linear-gradient(135deg,#eff6ff,#dbeafe);border:1px solid #bfdbfe;border-radius:24px;padding:28px;display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:center}
.hero h1{font-size:44px;line-height:1.15;margin:10px 0}
.badge{display:inline-block;padding:6px 12px;border-radius:999px;background:#dbeafe;color:#1e40af;font-weight:700}
.main-grid{display:grid;grid-template-columns:2.1fr .9fr;gap:24px;padding:22px 0 48px}
.card{background:var(--card);border:1px solid var(--line);border-radius:20px;overflow:hidden;box-shadow:0 8px 20px rgba(15,23,42,.04)}
.card-body{padding:20px}
.section-title{display:flex;align-items:end;justify-content:space-between;gap:12px;margin:8px 0 16px}
.section-title h1,.section-title h2{margin:0}
.featured-grid,.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:22px}
.post-list{display:flex;flex-direction:column;gap:18px}
.post-card{display:grid;grid-template-columns:280px 1fr}
.post-card .thumb,.video-card img{height:100%;object-fit:cover;min-height:190px}
.meta-row{display:flex;gap:14px;flex-wrap:wrap;color:var(--muted);font-size:14px;margin-bottom:8px;align-items:center}
.category-tag{font-weight:700}
.readmore{font-weight:700}
.sidebar{display:flex;flex-direction:column;gap:16px}
.side-card{padding:18px}
.side-card h3{margin:0 0 8px}
.mini-list{padding-left:18px;margin:0}
.mini-list li{margin:10px 0;color:var(--muted)}
.site-footer{border-top:1px solid var(--line);background:#fff;padding:18px 0;color:var(--muted)}
.article-cover{width:100%;max-height:420px;object-fit:cover}
.article-content h2{margin-top:28px}
.article-content ul{padding-left:20px}
.article-content img{border-radius:16px;margin:14px 0}
.article-content pre{background:#0f172a;color:#e2e8f0;padding:16px;border-radius:14px;overflow:auto}
.article-content code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.pagination{display:flex;justify-content:center;gap:14px;align-items:center;margin-top:18px;color:var(--muted)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stats-grid-3{grid-template-columns:repeat(3,1fr)}
.stat-box{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;text-align:center}
.stat-box strong{display:block;font-size:34px;color:var(--dark)}
.compact .compact-card{grid-template-columns:1fr}
.title-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;gap:12px}
.table{width:100%;border-collapse:collapse}
.table th,.table td{padding:12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.actions form{margin:0}
.link-danger{background:none;border:none;color:#dc2626;cursor:pointer;padding:0}
.preview{max-width:320px;border:1px solid var(--line);border-radius:14px;margin:8px 0}
.dual-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:20px}
.flash-stack{display:flex;flex-direction:column;gap:10px;margin-bottom:14px}
.flash{padding:12px 14px;border-radius:12px}
.flash.success{background:#dcfce7;color:#166534}
.flash.error{background:#fee2e2;color:#991b1b}
.admin-body,.login-body{background:#eef4fb}
.admin-layout{display:grid;grid-template-columns:240px 1fr;min-height:100vh}
.admin-sidebar{background:#0f172a;color:#fff;padding:24px;display:flex;flex-direction:column;gap:22px}
.admin-sidebar .brand{color:#fff}
.admin-sidebar nav{display:flex;flex-direction:column;gap:10px}
.admin-sidebar nav a{color:#cbd5e1;padding:10px 12px;border-radius:12px}
.admin-sidebar nav a:hover{background:rgba(255,255,255,.08);color:#fff}
.admin-main{padding:28px}
.admin-form{display:flex;flex-direction:column;gap:10px}
.login-box{width:min(460px,92%);margin:10vh auto}
.tip{color:var(--muted);font-size:14px}
.narrow-card{max-width:720px}
.inline-grid{display:grid;gap:14px}
.two-cols{grid-template-columns:1fr 1fr}
.checkbox-wrap{display:flex;align-items:end;padding-bottom:10px}
.editor-toolbar,.upload-inline-row,.action-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.toolbar-btn{padding:10px 14px}
.pin-badge{display:inline-block;padding:4px 10px;border-radius:999px;background:#fff7ed;color:#c2410c;font-size:12px;font-weight:700;border:1px solid #fdba74}
.video-player-wrap{background:#000}
.video-player{width:100%;max-height:580px;background:#000}
.comment-form{display:flex;flex-direction:column;gap:10px}
.comment-list{display:flex;flex-direction:column;gap:14px}
.comment-item{padding:14px;border:1px solid var(--line);border-radius:14px;background:#fff}
.comment-head{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:14px;margin-bottom:8px}
.comment-item p{margin:0}
@media (max-width: 980px){
  .hero-inner,.main-grid,.featured-grid,.video-grid,.post-card,.stats-grid,.stats-grid-3,.dual-grid,.admin-layout,.two-cols{grid-template-columns:1fr}
  .searchbar{width:100%;margin-left:0}
  .topbar{flex-wrap:wrap;padding:10px 0}
}
.user-quick{display:flex;align-items:center;gap:8px;color:var(--muted);margin-left:8px}
.nav-avatar,.comment-avatar,.table-avatar,.profile-avatar{width:34px;height:34px;border-radius:50%;object-fit:cover;border:1px solid var(--line)}
.profile-avatar{width:72px;height:72px}.admin-badge{display:inline-block;padding:2px 8px;border-radius:999px;background:#fee2e2;color:#b91c1c;font-size:12px;font-weight:700;margin-left:6px}.comment-head-rich{align-items:flex-start}.comment-user{display:flex;gap:10px;align-items:center}.comment-tools,.reply-box{margin-top:8px;display:flex;gap:10px;flex-wrap:wrap}.comment-replies{margin-top:12px;padding-left:22px;border-left:2px solid var(--line)}.reply-box textarea{min-width:260px;flex:1}.site-flash{padding-top:14px}.login-card{position:relative}.register-corner{text-align:right;margin-top:12px}.user-center-head{display:flex;align-items:center;gap:14px;margin-bottom:8px}.table-avatar{width:40px;height:40px}.inline-reply-form{display:flex;gap:8px;align-items:center;margin-bottom:6px}.inline-reply-form input{min-width:220px;padding:8px 10px;border:1px solid var(--line);border-radius:10px}@media (max-width:980px){.user-quick{width:100%;justify-content:flex-end}}

.rich-editor{min-height:420px;border:1px solid var(--line);border-radius:16px;background:#fff;padding:16px;line-height:1.75}.rich-editor:focus{outline:2px solid rgba(37,99,235,.18);border-color:#93c5fd}.rich-editor img{max-width:100%;border-radius:14px;margin:10px 0}.rich-editor pre{background:#0f172a;color:#e2e8f0;padding:16px;border-radius:14px;overflow:auto}.pagination a{color:var(--primary);font-weight:700}.actions .link-danger{padding:10px 12px;border:1px solid #fecaca;border-radius:10px;background:#fff7f7}.actions form{display:inline-flex}

.badge-count{display:inline-block;min-width:18px;padding:0 6px;border-radius:999px;background:#e74c3c;color:#fff;font-size:12px;line-height:18px;text-align:center;margin-left:4px}
.stack-form{display:grid;gap:12px;max-width:560px}
.stack-form input,.stack-form textarea,.stack-form select,.chat-input-row textarea{width:100%;padding:10px 12px;border:1px solid #d6dbe3;border-radius:10px;box-sizing:border-box}
.btn-secondary{padding:8px 14px;border:1px solid #c7cfdb;background:#fff;border-radius:10px;cursor:pointer}
.avatar-link-inline{display:inline-flex;align-items:center}
.profile-card{display:flex;gap:20px;align-items:flex-start}
.profile-avatar{width:96px;height:96px;border-radius:50%;object-fit:cover}
.profile-main h1{margin:0 0 8px}
.blacklist-row{display:flex;align-items:center;justify-content:space-between}
.comment-user a{text-decoration:none;color:inherit}
.table-avatar{width:34px;height:34px;border-radius:50%;object-fit:cover;vertical-align:middle}
.chat-modal{position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:999;align-items:center;justify-content:center}
.chat-shell{width:min(1000px,92vw);height:min(680px,86vh);background:#fff;border-radius:14px;overflow:hidden;display:grid;grid-template-columns:300px minmax(0,1fr);box-shadow:0 20px 60px rgba(0,0,0,.22)}
.chat-side{background:#f6f7fb;border-right:1px solid #e6eaf0;display:flex;flex-direction:column;min-height:0}
.chat-side-title{padding:18px 20px;font-weight:700;border-bottom:1px solid #e6eaf0;flex:0 0 auto}
.chat-contact-list{overflow:auto;flex:1 1 auto;min-height:0}
.chat-contact{width:100%;border:0;background:transparent;padding:14px 16px;display:flex;gap:12px;align-items:center;text-align:left;cursor:pointer;border-bottom:1px solid #eef1f6}
.chat-contact img{width:42px;height:42px;border-radius:50%;object-fit:cover}
.chat-main{display:grid;grid-template-rows:auto minmax(0,1fr) auto;background:#fff;min-width:0;min-height:0;height:100%}
.chat-main-top{padding:18px 20px;border-bottom:1px solid #e6eaf0;display:flex;justify-content:space-between;align-items:center}
.chat-close{border:0;background:transparent;font-size:28px;line-height:1;cursor:pointer}
.chat-message-list{overflow-y:auto;overflow-x:hidden;padding:18px;background:#f2f4f8;min-height:0;overscroll-behavior:contain}
.msg-row{display:flex;margin-bottom:12px}.msg-row.right{justify-content:flex-end}.msg-row.left{justify-content:flex-start}
.msg-bubble{max-width:70%;background:#fff;border:1px solid #e3e8f0;border-radius:14px;padding:10px 12px;box-shadow:0 2px 8px rgba(0,0,0,.03)}
.msg-row.right .msg-bubble{background:#dff1ff;border-color:#c6e3ff}
.msg-bubble small{display:block;margin-top:6px;color:#8590a3}
.chat-input-row{padding:14px;border-top:1px solid #e6eaf0;display:grid;grid-template-columns:1fr 100px;gap:12px;flex:0 0 auto;background:#fff;position:relative;z-index:2}
.chat-input-row textarea{height:72px;resize:none}
.empty-tip{padding:20px;color:#7b8596}