:root{
  --bg:#faf7f2; --card:#fff; --ink:#2b221b; --muted:#8b7d6b;
  --accent:#8b6f47; --accent2:#d47a2a; --line:#ece3d6; --chip:#f1e9dc;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink)}
/* 官网顶部导航（嵌在 BBS 顶部，方便切换回官网各栏目） */
.site-nav{position:sticky;top:0;z-index:40;background:rgba(246,243,236,.94);
  backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--line)}
.site-nav-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;
  padding:0 20px;height:56px}
.site-nav-brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:16px;color:var(--ink);text-decoration:none;white-space:nowrap}
.site-nav-logo{width:28px;height:28px;border-radius:7px;background:linear-gradient(135deg,#8b1e3f,#c46a3a);
  color:#fff;display:grid;place-items:center;font-size:15px;font-weight:900}
.site-nav-brand small{font-size:9px;color:var(--muted);letter-spacing:1.5px;display:block}
.site-nav-links{display:flex;gap:18px;font-size:13.5px;font-weight:600;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}
.site-nav-links::-webkit-scrollbar{display:none}
.site-nav-links a{color:#5b5347;text-decoration:none;white-space:nowrap;transition:color .2s}
.site-nav-links a:hover{color:var(--accent)}
.site-nav-links a.active{color:var(--accent);border-bottom:2px solid var(--accent);padding-bottom:3px}
.topbar{position:sticky;top:57px;z-index:20;display:flex;align-items:center;gap:18px;
  padding:12px 22px;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(6px)}
@media(max-width:720px){.site-nav-inner{padding:0 12px;height:52px}.site-nav-links{gap:14px;font-size:12.5px}.site-nav-brand small{display:none}.topbar{top:53px}}
.brand{font-size:22px;font-weight:800;color:var(--accent);white-space:nowrap;line-height:1.25}
.brand-sub{display:block;font-size:12px;font-weight:500;color:var(--muted);margin-left:0;margin-top:3px}
.search-wrap{flex:1;display:flex;max-width:640px;margin:0 auto}
.search-wrap input{flex:1;border:1px solid var(--line);border-right:none;border-radius:22px 0 0 22px;
  padding:10px 18px;font-size:14px;outline:none;background:#fff}
.search-wrap button{border:1px solid var(--accent);background:var(--accent);color:#fff;border-radius:0 22px 22px 0;
  padding:0 22px;font-size:14px;cursor:pointer}
.auth-area{white-space:nowrap}
.btn-ghost{border:1px solid var(--accent);background:transparent;color:var(--accent);border-radius:22px;
  padding:9px 18px;font-size:14px;cursor:pointer;font-weight:600}
.btn-primary{background:var(--accent);color:#fff;border:none;border-radius:22px;padding:11px 20px;
  font-size:15px;cursor:pointer;font-weight:700;margin-top:6px}
.btn-primary:hover{background:var(--accent2)}
.card .teaser{font-size:13px;color:var(--muted);margin:6px 0;line-height:1.5;border-left:3px solid var(--accent);padding-left:8px}
.card .lockbadge{display:inline-block;margin-left:6px;font-size:11px;background:#f0e6c8;color:#a07a1f;border-radius:8px;padding:1px 7px;vertical-align:middle;font-weight:600}

.filters{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;padding:14px 16px 4px}
.chip{border:1px solid var(--line);background:var(--chip);color:var(--muted);border-radius:20px;
  padding:7px 16px;font-size:13px;cursor:pointer;transition:.15s}
.chip.active,.chip:hover{background:var(--accent);color:#fff;border-color:var(--accent)}

main{max-width:1180px;margin:0 auto;padding:18px}
.masonry{column-count:4;column-gap:16px}
@media(max-width:1000px){.masonry{column-count:3}}
@media(max-width:680px){.masonry{column-count:2}.search-wrap{order:3;flex-basis:100%}}
.card{break-inside:avoid;background:var(--card);border:1px solid var(--line);border-radius:14px;
  overflow:hidden;margin-bottom:16px;cursor:pointer;transition:.18s;box-shadow:0 1px 4px rgba(0,0,0,.04)}
.card:hover{transform:translateY(-3px);box-shadow:0 6px 18px rgba(139,111,71,.15)}
.card img{width:100%;display:block;background:#f0e9dd}
.card .body{padding:12px 14px}
.card .ident{display:inline-block;font-size:11px;background:var(--chip);color:var(--accent);
  border-radius:10px;padding:3px 9px;margin-bottom:7px}
.card .ttl{font-size:15px;font-weight:700;line-height:1.35;margin-bottom:8px}
.card .hw{font-size:12.5px;color:var(--muted);line-height:1.5}
.card .hw b{color:var(--accent2)}
.empty{text-align:center;color:var(--muted);padding:60px;font-size:15px}

.modal{position:fixed;inset:0;background:rgba(43,34,27,.5);display:flex;align-items:center;
  justify-content:center;z-index:50;padding:18px}
.modal[hidden]{display:none}
.form[hidden]{display:none !important}
.modal-box{background:#fff;border-radius:16px;padding:26px;width:440px;max-width:100%;max-height:90vh;overflow:auto;position:relative}
.modal-box.wide{width:620px}
.close{position:absolute;top:12px;right:16px;font-size:24px;background:none;border:none;cursor:pointer;color:var(--muted)}
.tabs{display:flex;gap:8px;margin-bottom:16px}
.tab{border:none;background:var(--chip);color:var(--muted);padding:8px 18px;border-radius:18px;cursor:pointer;font-size:14px}
.tab.active{background:var(--accent);color:#fff}
.form{display:flex;flex-direction:column;gap:12px}
.form label{font-size:13px;color:var(--muted);display:flex;flex-direction:column;gap:5px}
.form input,.form textarea,.form select{border:1px solid var(--line);border-radius:9px;padding:10px 12px;
  font-size:14px;outline:none;font-family:inherit}
.form textarea{resize:vertical;min-height:64px}
.msg{font-size:13px;color:#c0392b;min-height:18px}
.hint{font-size:12px;color:var(--muted);line-height:1.5}
.post-guide{background:#faf6ee;border:1px solid #e7dcc4;border-radius:12px;padding:14px 16px;margin-bottom:18px;font-size:13px;color:#5a4a3a;line-height:1.65}
.post-guide strong{color:var(--accent2);font-weight:500}
.post-guide p{margin:6px 0}
.post-guide ul{margin:6px 0;padding-left:18px}
.post-guide li{margin:3px 0}
.post-guide em{color:var(--accent);font-style:normal;font-weight:500}
.post-guide b{color:var(--accent2);font-weight:500}
#detailBody img{width:100%;border-radius:10px;margin-bottom:10px}
#detailBody h3{margin-bottom:10px}
#detailBody .meta{font-size:13px;color:var(--muted);margin:8px 0}
#detailBody .hw{background:var(--bg);border-radius:10px;padding:12px;margin:10px 0;line-height:1.6;font-size:14px}
#detailBody .hw b{color:var(--accent2)}
.fab{position:fixed;right:24px;bottom:24px;width:58px;height:58px;border-radius:50%;border:none;
  background:var(--accent);color:#fff;font-size:26px;cursor:pointer;box-shadow:0 4px 16px rgba(139,111,71,.4);z-index:30}
.fab:hover{background:var(--accent2)}
.pending{border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:12px}
.pending img{width:88px;border-radius:8px;margin:6px 6px 0 0;vertical-align:top}
.pending .acts{margin-top:10px;display:flex;gap:8px}
.pending .acts button{padding:7px 16px;border-radius:16px;border:none;cursor:pointer;font-size:13px}
.pending .ok{background:#2e8b57;color:#fff}
.pending .no{background:#c0392b;color:#fff}

/* 消息 */
.msg-btn{position:relative;margin-left:10px}
.msg-btn .badge{position:absolute;top:-8px;right:-8px;background:#c0392b;color:#fff;border-radius:12px;
  font-size:11px;min-width:18px;height:18px;line-height:18px;text-align:center;padding:0 4px;font-weight:700}
.msg-layout{display:flex;gap:14px;margin-top:10px;min-height:340px}
.conv-list{width:180px;flex:0 0 180px;border-right:1px solid var(--line);overflow:auto;max-height:60vh}
.conv-item{padding:10px 12px;border-radius:10px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:6px}
.conv-item:hover,.conv-item.active{background:var(--chip)}
.conv-item .name{font-size:14px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.conv-item .dot{background:#c0392b;color:#fff;border-radius:10px;font-size:11px;min-width:18px;height:18px;line-height:18px;text-align:center;padding:0 5px}
.conv-box{flex:1;display:flex;flex-direction:column;min-width:0}
.conv-empty{color:var(--muted);text-align:center;margin:auto;font-size:14px}
.bubble{max-width:78%;padding:10px 13px;border-radius:14px;margin:7px 0;font-size:14px;line-height:1.5;word-break:break-word}
.bubble.me{align-self:flex-end;background:var(--accent);color:#fff;border-bottom-right-radius:4px}
.bubble.them{background:var(--chip);color:var(--ink);border-bottom-left-radius:4px}
.conv-msgs{flex:1;overflow:auto;display:flex;flex-direction:column;max-height:46vh;padding-right:4px}
.conv-reply{display:flex;gap:8px;margin-top:10px}
.conv-reply input{flex:1;border:1px solid var(--line);border-radius:20px;padding:9px 14px;font-size:14px;outline:none}
.conv-reply button{border:none;background:var(--accent);color:#fff;border-radius:20px;padding:0 18px;cursor:pointer;font-size:14px}