.ysc-btn{position:fixed;right:16px;bottom:16px;z-index:60;display:flex;align-items:center;gap:8px;border:0;border-radius:999px;background:var(--sea);color:#fff;font-weight:600;padding:12px 18px;box-shadow:0 8px 24px rgba(11,79,85,.28);cursor:pointer}
.ysc-btn svg{width:20px;height:20px}.ysc-dot{width:9px;height:9px;border-radius:50%;background:#F59E0B;display:none}.ysc-btn.unread .ysc-dot{display:block}
.ysc{position:fixed;right:16px;bottom:16px;z-index:61;width:380px;max-width:calc(100vw - 32px);height:min(620px,calc(100vh - 32px));background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 18px 50px rgba(0,0,0,.18);display:flex;flex-direction:column;overflow:hidden}
.ysc[hidden]{display:none}
.ysc-hd{display:flex;align-items:center;gap:10px;padding:12px 14px;background:var(--sea);color:#fff}.ysc-hd b{display:block;font-size:15px}.ysc-hd small{display:block;font-size:12px;opacity:.85}
.ysc-hd button{margin-left:auto;background:transparent;border:0;color:#fff;font-size:22px;line-height:1;padding:4px 8px;cursor:pointer}
.ysc-list{flex:1;overflow:auto;padding:14px;display:flex;flex-direction:column;gap:10px;background:var(--bg)}
.ysc-m{max-width:86%;padding:9px 12px;border-radius:14px;font-size:14px;line-height:1.5;white-space:pre-wrap;word-break:break-word;background:#fff;border:1px solid var(--line);align-self:flex-start}
.ysc-m.me{align-self:flex-end;background:var(--sea);border-color:var(--sea);color:#fff}.ysc-m.sys{align-self:center;background:transparent;border:0;font-size:12px;color:var(--ink2);text-align:center}
.ysc-m small{display:block;font-size:11px;opacity:.6;margin-top:3px}
.ysc-cards{display:grid;gap:8px;align-self:stretch}
.ysc-card{display:grid;grid-template-columns:56px 1fr;gap:10px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:8px;font-size:13px}
.ysc-card img{width:56px;height:56px;object-fit:cover;border-radius:8px;background:var(--sea50)}.ysc-card a{font-weight:600;text-decoration:none;color:var(--ink);display:block;line-height:1.35}
.ysc-card .v{color:var(--ink2);font-size:12px}.ysc-card .row{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:4px}.ysc-card .pr{font-weight:700;color:var(--red)}
.ysc-card button{border:1px solid var(--sea);color:var(--sea);background:#fff;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:600;cursor:pointer}.ysc-card button:disabled{opacity:.5;cursor:default}
.ysc-chips{display:flex;flex-wrap:wrap;gap:6px}.ysc-chips button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 12px;font-size:13px;cursor:pointer}
.ysc-chips button:hover{border-color:var(--sea);color:var(--sea)}
.ysc-typing{font-size:12px;color:var(--ink2);padding:0 14px 6px;background:var(--bg)}
.ysc-ft{border-top:1px solid var(--line);padding:10px;display:grid;gap:8px;background:#fff}
.ysc-in{display:flex;gap:8px}.ysc-in textarea{flex:1;resize:none;border:1px solid var(--line);border-radius:12px;padding:9px 11px;font-size:14px;max-height:110px;min-height:42px}
.ysc-in button{border:0;border-radius:12px;background:var(--sea);color:#fff;font-weight:600;padding:0 16px;cursor:pointer}.ysc-in button:disabled{opacity:.5}
.ysc-links{display:flex;gap:14px;font-size:12px}.ysc-links button{background:none;border:0;padding:0;color:var(--sea);text-decoration:underline;cursor:pointer;font-size:12px}
.ysc-form{display:grid;gap:6px}.ysc-form input{border:1px solid var(--line);border-radius:10px;padding:8px 10px;font-size:14px}.ysc-form[hidden]{display:none}
.ysc-form .row{display:flex;gap:6px}.ysc-form .row input{flex:1;min-width:0}.ysc-form button{border:0;border-radius:10px;background:var(--sea);color:#fff;font-weight:600;padding:0 12px;cursor:pointer}
.ysc-note{font-size:11px;color:var(--ink2)}
@media (max-width:640px){.ysc{right:0;bottom:0;width:100vw;max-width:100vw;height:88vh;height:88dvh;border-radius:18px 18px 0 0}.ysc-ft{padding-bottom:calc(10px + env(safe-area-inset-bottom))}.ysc-btn{right:12px;bottom:12px;padding:11px 14px}.ysc-btn span.t{display:none}
  .has-buy .ysc-btn{bottom:96px}}