/* friends.css — 好友系统（fs- 前缀）全部样式（源文件行 761-962，保持原顺序） */
  /* ==================== FriendSystem 好友系统样式（独立前缀 fs-） ==================== */
  .fs-friend-btn{
    position:relative;width:36px;height:36px;border-radius:8px;border:none;
    background:transparent;color:var(--text);cursor:pointer;display:flex;
    align-items:center;justify-content:center;font-size:16px;transition:background .15s;
  }
  .fs-friend-btn:hover{background:rgba(74,158,255,.15);color:var(--primary)}
  .fs-badge{
    position:absolute;top:2px;right:2px;min-width:16px;height:16px;padding:0 4px;
    background:var(--red);color:#fff;font-size:10px;font-weight:700;border-radius:8px;
    display:flex;align-items:center;justify-content:center;line-height:1;
  }
  .fs-panel{
    position:fixed;top:0;right:-380px;width:360px;max-width:90vw;height:100%;
    background:var(--surface);border-left:1px solid var(--border);z-index:2500;
    display:flex;flex-direction:column;transition:right .25s ease;
    box-shadow:-4px 0 20px rgba(0,0,0,.3);
  }
  .fs-panel.show{right:0}
  .fs-panel-header{
    padding:16px 14px 12px;border-bottom:1px solid var(--border);flex-shrink:0;
    padding-top:calc(16px + env(safe-area-inset-top,0px));
  }
  .fs-my-id-section{
    background:rgba(74,158,255,.08);border-radius:10px;padding:10px 12px;margin-bottom:12px;
    display:flex;align-items:center;gap:10px;
  }
  .fs-my-id-label{font-size:11px;color:var(--text-dim);margin-bottom:2px}
  .fs-my-id{font-size:18px;font-weight:700;color:var(--primary);letter-spacing:2px;font-family:monospace}
  .fs-copy-id-btn{
    margin-left:auto;padding:5px 10px;border-radius:6px;border:1px solid var(--primary);
    background:transparent;color:var(--primary);font-size:11px;cursor:pointer;transition:all .15s;
  }
  .fs-copy-id-btn:hover{background:var(--primary);color:#fff}
  .fs-tabs{display:flex;gap:4px;margin-bottom:0;flex-wrap:wrap}
  .fs-tab{
    flex:1 1 auto;padding:7px 6px;text-align:center;font-size:12px;color:var(--text-dim);
    cursor:pointer;border-radius:6px;transition:all .15s;position:relative;white-space:nowrap;
  }
  .fs-tab.active{background:var(--primary);color:#fff}
  .fs-tab .fs-tab-badge{
    position:absolute;top:4px;right:8px;min-width:16px;height:16px;padding:0 4px;
    background:var(--red);color:#fff;font-size:10px;font-weight:700;border-radius:8px;
    display:flex;align-items:center;justify-content:center;
  }
  .fs-panel-toolbar{
    display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;
  }
  .fs-panel-title{font-size:15px;font-weight:600;display:flex;align-items:center;gap:6px}
  .fs-add-btn{
    width:30px;height:30px;border-radius:6px;border:none;background:var(--primary);
    color:#fff;font-size:14px;cursor:pointer;display:flex;align-items:center;justify-content:center;
  }
  .fs-add-btn:hover{background:var(--primary-dark)}
  .fs-close-btn{
    width:30px;height:30px;border-radius:6px;border:none;background:transparent;
    color:var(--text-dim);font-size:16px;cursor:pointer;display:flex;align-items:center;justify-content:center;
    margin-left:4px;
  }
  .fs-close-btn:hover{background:rgba(255,255,255,.1);color:var(--text)}
  /* ===== 消息接收开关按钮 ===== */
  .fs-recv-toggle{
    width:30px;height:30px;border-radius:6px;border:1px solid rgba(255,255,255,.15);
    background:transparent;color:var(--text-dim);font-size:13px;cursor:pointer;
    display:flex;align-items:center;justify-content:center;position:relative;
    transition:all .15s;padding:0;
  }
  .fs-recv-toggle:hover{border-color:var(--primary);color:var(--primary)}
  .fs-recv-toggle.on{background:rgba(74,158,255,.15);border-color:var(--primary);color:var(--primary)}
  .fs-recv-toggle.off{opacity:.55}
  .fs-recv-toggle .fs-recv-dot{
    position:absolute;top:3px;right:3px;width:7px;height:7px;border-radius:50%;
    background:var(--text-dim);
  }
  .fs-recv-toggle.on .fs-recv-dot{background:var(--green);box-shadow:0 0 4px var(--green)}
  .fs-recv-toggle.off .fs-recv-dot{background:var(--red)}
  .fs-recv-hint{
    display:flex;gap:8px;padding:6px 10px;font-size:11px;color:var(--text-dim);
    border-top:1px solid var(--border);background:rgba(0,0,0,.15);align-items:center;
  }
  .fs-recv-hint .fs-recv-chip{
    display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:10px;
    cursor:pointer;transition:all .15s;border:1px solid transparent;user-select:none;
  }
  .fs-recv-hint .fs-recv-chip.on{color:var(--green);border-color:rgba(39,174,96,.3);background:rgba(39,174,96,.08)}
  .fs-recv-hint .fs-recv-chip.off{color:var(--red);border-color:rgba(231,76,60,.3);background:rgba(231,76,60,.08)}
  .fs-list{flex:1;overflow-y:auto;padding:8px}
  .fs-list::-webkit-scrollbar{width:4px}
  .fs-list::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}
  .fs-item{
    display:flex;align-items:center;gap:10px;padding:10px;border-radius:10px;
    cursor:pointer;transition:background .15s;margin-bottom:4px;position:relative;
  }
  .fs-item:hover{background:rgba(255,255,255,.05)}
  .fs-avatar{
    width:42px;height:42px;border-radius:50%;display:flex;align-items:center;
    justify-content:center;font-size:16px;font-weight:700;color:#fff;flex-shrink:0;
  }
  .fs-item-info{flex:1;min-width:0}
  .fs-item-name{font-size:14px;font-weight:500;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .fs-item-sub{font-size:11px;color:var(--text-dim);margin-top:2px}
  .fs-item-unread{
    min-width:20px;height:20px;padding:0 6px;background:var(--red);color:#fff;
    font-size:11px;font-weight:700;border-radius:10px;display:flex;align-items:center;
    justify-content:center;
  }
  .fs-item-status{font-size:11px;padding:2px 8px;border-radius:10px}
  .fs-item-status.online{background:rgba(39,174,96,.15);color:var(--green)}
  .fs-item-status.offline{background:rgba(255,255,255,.05);color:var(--text-dim)}
  .fs-empty{
    text-align:center;padding:40px 20px;color:var(--text-dim);font-size:13px;
  }
  .fs-empty i{font-size:36px;display:block;margin-bottom:12px;opacity:.3}
  .fs-req-actions{display:flex;gap:6px}
  .fs-req-btn{
    padding:5px 12px;border-radius:6px;border:none;font-size:12px;cursor:pointer;
    font-weight:500;transition:all .15s;
  }
  .fs-req-btn.accept{background:var(--green);color:#fff}
  .fs-req-btn.accept:hover{background:#219a52}
  .fs-req-btn.reject{background:rgba(255,255,255,.1);color:var(--text-dim)}
  .fs-req-btn.reject:hover{background:rgba(231,76,60,.2);color:var(--red)}
  .fs-req-btn.cancel{background:rgba(255,255,255,.1);color:var(--text-dim)}
  .fs-req-btn.cancel:hover{background:rgba(231,76,60,.2);color:var(--red)}
  .fs-msg-item{
    padding:10px;border-radius:10px;background:rgba(255,255,255,.03);margin-bottom:6px;
  }
  .fs-msg-from{font-size:12px;color:var(--primary);font-weight:600;margin-bottom:4px;display:flex;justify-content:space-between;align-items:center}
  .fs-msg-from .fs-msg-sender{
    cursor:pointer;color:var(--primary);transition:opacity .15s;
    padding:1px 3px;border-radius:4px;display:inline-flex;align-items:center;gap:4px;
  }
  .fs-msg-from .fs-msg-sender:hover{opacity:.75;text-decoration:underline;background:rgba(74,158,255,.08)}
  .fs-msg-from .fs-msg-sender.self{color:rgba(74,158,255,.85)}
  .fs-msg-from .fs-msg-time{color:var(--text-dim);font-weight:400;font-size:11px}
  .fs-msg-time{font-size:10px;color:var(--text-dim);font-weight:400}
  .fs-msg-text{font-size:13px;color:var(--text);line-height:1.5;word-break:break-word}
  .fs-msg-status{font-size:10px;margin-top:4px;color:var(--yellow)}
  .fs-msg-status.delivered{color:var(--green)}
  .fs-msg-status.unread{color:var(--red);font-weight:700}
  .fs-msg-meta{display:flex;justify-content:space-between;align-items:center;margin-top:6px;gap:8px;flex-wrap:wrap}
  .fs-msg-actions{display:flex;gap:6px;margin-left:auto}
  .fs-msg-btn{padding:4px 10px;font-size:11px;border:none;border-radius:4px;background:var(--bg);color:var(--primary);cursor:pointer;transition:all .2s;font-family:inherit;display:inline-flex;align-items:center;gap:4px}
  .fs-msg-btn:hover{background:var(--primary);color:#fff}
  .fs-msg-btn.danger{color:var(--red)}
  .fs-msg-btn.danger:hover{background:var(--red);color:#fff}
  .fs-msg-btn i{font-size:10px}
  .fs-overlay{
    position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:2499;display:none;
  }
  .fs-overlay.show{display:block}
  .fs-context-menu{
    position:fixed;background:var(--surface);border:1px solid var(--border);
    border-radius:10px;padding:6px;z-index:3000;min-width:150px;
    box-shadow:0 10px 40px rgba(0,0,0,.5);display:none;
  }
  .fs-context-menu.show{display:block}
  .fs-ctx-item{
    padding:8px 14px;border-radius:6px;cursor:pointer;font-size:13px;
    display:flex;align-items:center;gap:8px;transition:background .15s;
  }
  .fs-ctx-item:hover{background:rgba(255,255,255,.08)}
  .fs-ctx-item.danger{color:var(--red)}
  .fs-ctx-item.danger:hover{background:rgba(231,76,60,.15)}
  .fs-notify-popup{
    position:fixed;top:70px;right:16px;background:var(--surface);border:1px solid var(--primary);
    border-radius:12px;padding:14px 18px;z-index:3100;max-width:320px;
    box-shadow:0 8px 30px rgba(0,0,0,.4);animation:fsSlideIn .3s ease;
  }
  @keyframes fsSlideIn{from{transform:translateX(120%);opacity:0}to{transform:translateX(0);opacity:1}}
  .fs-notify-title{font-size:13px;font-weight:600;color:var(--primary);margin-bottom:6px;display:flex;align-items:center;gap:6px}
  .fs-notify-text{font-size:12px;color:var(--text);line-height:1.5;margin-bottom:10px}
  .fs-notify-actions{display:flex;gap:8px;justify-content:flex-end}
  .fs-notify-btn{
    padding:6px 14px;border-radius:6px;border:none;font-size:12px;cursor:pointer;font-weight:500;
  }
  .fs-notify-btn.primary{background:var(--primary);color:#fff}
  .fs-notify-btn.secondary{background:rgba(255,255,255,.1);color:var(--text)}
  /* 自定义确认弹框（层级最高，手机端一定可见）*/
  .fs-confirm-mask{
    position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:5000;
    display:none;align-items:center;justify-content:center;padding:20px;
  }
  .fs-confirm-mask.show{display:flex}
  .fs-confirm-box{
    background:var(--surface);border:1px solid var(--border);border-radius:14px;
    padding:20px;max-width:340px;width:100%;box-shadow:0 20px 60px rgba(0,0,0,.6);
    animation:fsPop .2s ease;
  }
  @keyframes fsPop{from{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}
  .fs-confirm-text{font-size:14px;color:var(--text);line-height:1.6;margin-bottom:18px;text-align:center}
  .fs-confirm-btns{display:flex;gap:10px;justify-content:flex-end}
  .fs-confirm-btns button{
    padding:8px 18px;border-radius:8px;border:none;font-size:13px;cursor:pointer;
    font-family:inherit;font-weight:500;transition:all .2s;
  }
  .fs-confirm-cancel{background:rgba(255,255,255,.1);color:var(--text)}
  .fs-confirm-cancel:hover{background:rgba(255,255,255,.18)}
  .fs-confirm-ok{background:var(--primary);color:#fff}
  .fs-confirm-ok:hover{filter:brightness(1.1)}
  .fs-confirm-ok.danger{background:var(--red)}
  .fs-confirm-ok.danger:hover{background:#c0392b}