:root{--bg:#f6f7f9;--surface:#fff;--border:#e3e6ea;--text:#1f2430;--text-muted:#6b7280;--accent:#2563eb;--accent-hover:#1d4ed8}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:system-ui,-apple-system,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;line-height:1.6}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:760px;margin:0 auto;padding:0 16px}.site-header{background:var(--surface);border-bottom:1px solid var(--border)}.header-inner{justify-content:space-between;align-items:center;height:56px;display:flex}.logo{color:var(--text);font-size:1.15rem;font-weight:700}.logo:hover{color:var(--accent);text-decoration:none}.nav{align-items:center;gap:14px;display:flex}.nav a{color:var(--text-muted)}.nav a:hover{color:var(--accent);text-decoration:none}.btn-new{background:var(--accent);border-radius:6px;padding:4px 12px;color:#fff!important}.btn-new:hover{background:var(--accent-hover)}.user-chip{color:var(--text);font-weight:600}.link-btn{color:var(--text-muted);cursor:pointer;font:inherit;background:0 0;border:none;padding:0}.link-btn:hover{color:var(--accent)}.stats{color:var(--text-muted);gap:16px;margin:20px 0 8px;font-size:.9rem;display:flex}.thread-list{flex-direction:column;gap:10px;margin:12px 0 32px;display:flex}.thread-item{background:var(--surface);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:12px 16px;display:block}.thread-item:hover{border-color:var(--accent);text-decoration:none}.thread-title{font-weight:600}.thread-meta{color:var(--text-muted);margin-top:2px;font-size:.85rem}.thread-heading{margin:20px 0 16px;font-size:1.4rem}.post{background:var(--surface);border:1px solid var(--border);border-radius:8px;margin-bottom:10px;padding:12px 16px}.post-head{justify-content:space-between;margin-bottom:6px;font-size:.9rem;display:flex}.post-time{color:var(--text-muted)}.post-body{white-space:pre-wrap;margin:0}form{flex-direction:column;gap:10px;margin-bottom:32px;display:flex}input,textarea{font:inherit;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:8px;padding:10px 12px}input:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:var(--accent)}button[type=submit]{font:inherit;background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;align-self:flex-start;padding:8px 20px}button[type=submit]:hover:not(:disabled){background:var(--accent-hover)}button[type=submit]:disabled{opacity:.5;cursor:not-allowed}.reply-form{margin-top:20px}.empty,.notice{color:var(--text-muted);margin:24px 0}.notice.error{color:#c0392b;margin:12px 0}.site-footer{border-top:1px solid var(--border);color:var(--text-muted);margin-top:24px;padding:16px 0 24px;font-size:.85rem}