:root{--sky:#38bdf8;--sky-deep:#0ea5e9;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;}
  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;}
  body{min-height:100vh;display:flex;flex-direction:column;background:#f1f5f9;color:var(--ink);
    font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", sans-serif;}

  .chip{position:absolute;top:-9px;right:-6px;z-index:6;font-size:10px;line-height:1;font-weight:700;color:#0369a1;
    background:#e0f2fe;border-radius:4px;padding:2px 4px;pointer-events:none;white-space:nowrap;}
  .toast{position:fixed;left:50%;top:108px;transform:translate(-50%,-14px);z-index:99;background:rgba(15,23,42,.92);
    color:#fff;font-size:13px;padding:10px 18px;border-radius:16px;opacity:0;pointer-events:none;transition:.25s;
    max-width:min(92vw,560px);text-align:center;line-height:1.5;word-break:break-word;box-shadow:0 10px 30px rgba(15,23,42,.28);}
  .toast.on{opacity:1;transform:translate(-50%,0);}

  /* 区域1 */
  .r1{position:sticky;top:0;z-index:40;height:96px;flex:0 0 96px;display:flex;align-items:center;gap:14px;
    padding:0 26px;background:#fff;border-bottom:1px solid var(--line);}
  .r1 .logo{width:60px;height:60px;border-radius:12px;border:1px solid var(--line);display:grid;place-items:center;
    font-weight:900;color:var(--sky-deep);font-size:20px;flex:0 0 60px;text-decoration:none;position:relative;}
  .r1 .logo:hover{border-color:var(--sky);}
  .r1 .sitname{font-weight:900;font-size:26px;letter-spacing:.04em;white-space:nowrap;color:var(--ink);
    text-decoration:none;position:relative;padding:4px 8px;}
  .r1 .sitname:hover{color:var(--sky-deep);}
  .r1 .search{flex:1;display:flex;align-items:center;gap:8px;padding:6px 8px 6px 18px;background:#f8fafc;
    border:1px solid var(--line);border-radius:999px;position:relative;}
  .r1 .search input{border:0;outline:0;flex:1;font:inherit;font-size:14px;background:transparent;color:var(--ink);}
  .r1 .search button{border:0;border-radius:999px;background:var(--sky);color:#fff;font:inherit;font-weight:700;padding:8px 20px;cursor:pointer;}
  .r1 .search button:hover{background:var(--sky-deep);}
  .r1 .user{display:flex;flex-direction:column;align-items:center;gap:4px;margin-left:6px;}
  .r1 .avatar{width:54px;height:54px;border-radius:50%;border:2px solid var(--line);
    background:linear-gradient(135deg,#f8fafc,#e2e8f0);display:grid;place-items:center;font-size:22px;
    cursor:pointer;text-decoration:none;position:relative;color:var(--ink);}
  .r1 .uname{font-size:12px;color:#334155;background:#f1f5f9;border:1px solid var(--line);border-radius:6px;
    padding:2px 8px;cursor:pointer;text-decoration:none;position:relative;}
  .r1 .uname:hover{background:var(--sky);border-color:var(--sky);color:#fff;}

  /* 主体 */
  .wrap{flex:1;display:flex;justify-content:center;align-items:flex-start;padding:28px 26px 44px;}
  .panel{width:min(820px,100%);background:#fff;border:1px solid var(--line);border-radius:16px;
    padding:40px 52px 34px;box-shadow:0 8px 24px rgba(15,23,42,.06);}
  .panel h1{margin:0 0 6px;font-size:28px;font-weight:900;text-align:center;}
  .sub{margin:0 0 26px;text-align:center;font-size:13px;color:var(--muted);}

  h2.sec{display:flex;align-items:center;gap:10px;margin:26px 0 12px;font-size:15px;}
  h2.sec:first-of-type{margin-top:6px;}
  h2.sec span{font-size:12px;color:var(--muted);font-weight:400;}

  .list{display:flex;flex-direction:column;gap:12px;}
  .item{display:flex;align-items:center;gap:14px;background:#f8fafc;border:1px solid var(--line);
    border-radius:12px;padding:14px 18px;transition:.18s;}
  .item:hover{border-color:var(--sky);background:#fff;}
  .item .face{position:relative;width:54px;height:54px;border-radius:50%;border:2px solid var(--line);flex:0 0 54px;
    background:linear-gradient(135deg,#f8fafc,#e2e8f0);display:grid;place-items:center;font-size:24px;
    text-decoration:none;color:var(--ink);}
  .item .info{min-width:0;flex:1;}
  .item .nm{font-size:15px;font-weight:900;color:var(--ink);text-decoration:none;}
  .item .nm:hover{color:var(--sky-deep);text-decoration:underline;}
  .item .meta{font-size:12px;color:var(--muted);margin-top:4px;}
  .item .meta b{color:var(--sky-deep);}
  /* 关注 / 已关注：不要框，只有文本，点击文字即切换 */
  .btn{font:inherit;font-size:13px;font-weight:700;cursor:pointer;
    border-radius:999px;padding:8px 20px;transition:.18s;white-space:nowrap;}
  .btn.follow{background:var(--sky);border:1px solid var(--sky);color:#fff;}
  .btn.follow:hover{background:var(--sky-deep);border-color:var(--sky-deep);}
  .btn.unfollow{background:#fff;border:1px solid var(--line);color:#64748b;}
  .btn.unfollow:hover{border-color:#fecdd3;color:#e11d48;background:#fff1f2;}
  .empty{font-size:13px;color:var(--muted);text-align:center;padding:24px;background:#f8fafc;
    border:1px dashed var(--line);border-radius:12px;}

  /* 未登录提示 */
  .need-login{display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;padding:40px 20px;}
  .need-login .nl-face{width:96px;height:96px;border-radius:50%;border:2px solid var(--line);
    background:linear-gradient(135deg,#f8fafc,#e2e8f0);display:grid;place-items:center;font-size:42px;}
  .need-login h2{margin:0;font-size:20px;}
  .need-login p{margin:0;font-size:13px;color:var(--muted);}
  .need-login .nl-btn{font-size:14px;font-weight:700;color:#fff;background:var(--sky);border-radius:999px;
    padding:10px 28px;text-decoration:none;transition:.18s;}
  .need-login .nl-btn:hover{background:var(--sky-deep);}

  /* 区域4 */
  .r4{flex:0 0 auto;display:flex;align-items:center;gap:20px;padding:16px 26px;background:#fff;border-top:1px solid var(--line);}
  .r4 .logo{width:42px;height:42px;border-radius:9px;border:1px solid var(--line);display:grid;place-items:center;font-weight:900;color:var(--sky-deep);font-size:15px;flex:0 0 42px;text-decoration:none;}
  .r4 .sitname{font-size:17px;font-weight:900;text-decoration:none;color:var(--ink);}
  .r4 .beian{flex:1;font-size:12px;color:#475569;text-align:center;background:#f8fafc;border:1px solid var(--line);border-radius:9px;padding:10px;line-height:1.6;}
  .r4 .contact{font-size:12px;color:#475569;text-align:right;line-height:1.7;background:#f8fafc;border:1px solid var(--line);border-radius:9px;padding:10px 12px;}

/* ================= 移动端适配（卡片页） ================= */
@media (max-width: 768px) {
  .wrap { padding: 12px; }
  .panel { padding: 18px 16px; border-radius: 12px; }
  .panel h1 { font-size: 22px; }
  .form .r { flex-direction: column; align-items: stretch; gap: 6px; }
  .form label { width: auto; }
  .form input, .form textarea { width: 100%; }
  .form .act { text-align: center; }
  .list .item { flex-wrap: wrap; gap: 8px; padding: 10px 12px; }
  .item .meta { font-size: 12px; }
}


/* ================= 移动端适配（页眉 / 页脚） ================= */
@media (max-width: 1024px) {
  .r1 { height: auto !important; flex: 0 0 auto !important; flex-wrap: wrap; padding: 10px 14px; gap: 10px; }
  .r1 .logo { width: 46px; height: 46px; flex: 0 0 46px; font-size: 17px; border-radius: 10px; }
  .r1 .sitname { font-size: 20px; padding: 2px 6px; }
  .r1 .search { order: 3; flex: 1 0 100%; padding: 5px 6px 5px 14px; }
  .r1 .search input { font-size: 13.5px; }
  .r1 .search button { padding: 7px 16px; font-size: 13px; }
  .r1 .user { flex-direction: row; align-items: center; gap: 8px; margin-left: auto; }
  .r1 .avatar { width: 40px; height: 40px; font-size: 16px; }
  .r1 .uname { font-size: 11px; padding: 2px 6px; }
  .r4 { flex-wrap: wrap; padding: 14px; gap: 10px; }
  .r4 .logo { font-size: 18px; }
  .r4 .beian { flex: 1 0 100%; order: 3; text-align: left; }
  .r4 .contact { text-align: left; margin-left: auto; }
}
@media (max-width: 768px) {
  .r1 { padding: 8px 10px; gap: 8px; }
  .r1 .sitname { font-size: 17px; }
  .r1 .search { padding-left: 12px; }
  .r4 { font-size: 12px; }
}


/* --- 手机端修正：关注项排布 --- */
@media (max-width: 768px) {
  .panel .list .item { align-items: flex-start; }
  .panel .list .item .info { min-width: 0; }
}


/* ================= 移动端兜底：不允许横向溢出 ================= */
@media (max-width: 1024px) {
  html, body { max-width: 100%; overflow-x: hidden; }
  .r1 .search, .r1 .search input { min-width: 0; }
  .r4 { position: relative !important; margin-top: auto; }   /* 手机上页脚跟随内容：用 relative（不能用 static，否则背景层会铺满整页） */        /* 手机上页脚跟随内容，不吸在屏幕底部 */
  .r4 .beian, .r4 .contact { overflow-wrap: anywhere; }
  .card, .cards, .panel, .col, .row, .item, .msg, .post, .c13, .b2-scroll { min-width: 0; }
  .card .meta .t, .wall .msg, .post .ttl, .row h3, .row p,
  .card .cover .c-title, .paper h1 { overflow-wrap: anywhere; word-break: break-word; }
}