/* ==================== v2: 作业 / 讨论区 / 客服 ==================== */
.hw-card, .cm-card { background:#fff; border:1px solid var(--border); border-radius:12px; padding:20px 22px; margin-top:18px; }
.hw-head, .cm-head { display:flex; align-items:center; gap:10px; margin-bottom:10px; }
.hw-head h3, .cm-head h3 { margin:0; font-size:17px; }
.hw-flag { font-size:12px; padding:2px 8px; border-radius:10px; background:var(--purple-bg); color:var(--purple); }
.hw-flag-wait { background:#FFF6E5; color:#A9701A; }
.hw-flag-done { background:#E9F7EE; color:#1F7A44; }
.hw-title { font-weight:bold; margin:6px 0 8px; color:var(--purple-dark); }
.hw-prompt { background:var(--purple-bg); border-radius:10px; padding:14px 16px; white-space:pre-wrap; font-size:14px; line-height:1.9; color:#3D3550; }
.hw-result { margin-top:14px; }
.hw-grade { display:flex; gap:16px; background:#F7FBF8; border:1px solid #DCEEE2; border-radius:10px; padding:14px 16px; }
.hw-grade-score { font-size:26px; font-weight:bold; color:#1F7A44; min-width:64px; }
.hw-grade-label { margin:0; font-size:12px; color:var(--muted); }
.hw-grade-text { margin:4px 0 6px; white-space:pre-wrap; }
.hw-mine { margin-top:12px; padding:12px 16px; background:#FBFAFD; border-radius:10px; }
.hw-mine-label { margin:0 0 4px; font-size:12px; color:var(--muted); }
.hw-mine-text { margin:0; white-space:pre-wrap; }
.hw-file { display:inline-block; background:#fff; border:1px solid var(--border); border-radius:8px; padding:6px 12px; font-size:13px; }
.hw-form-wrap { margin-top:16px; }
.hw-form-wrap summary { cursor:pointer; color:var(--purple); font-size:14px; }
.hw-form { margin-top:12px; }
.hw-form textarea, .cm-form textarea, .cm-reply-form textarea, .grade-form textarea { width:100%; padding:10px 12px; border:1px solid var(--border); border-radius:8px; font-family:inherit; font-size:14px; resize:vertical; }
.hw-file-row { display:flex; align-items:center; gap:12px; flex-wrap:wrap; margin:10px 0; }
.hw-form .btn, .cm-form .btn { margin-top:8px; }

.cm-tip { color:var(--muted); font-size:13px; background:var(--purple-bg); border-radius:8px; padding:10px 14px; }
.cm-form { margin-bottom:20px; }
.cm-form-foot { display:flex; justify-content:space-between; align-items:center; gap:12px; }
.cm-item { display:flex; gap:12px; padding:16px 0; border-top:1px solid var(--border); }
.cm-avatar { flex:0 0 34px; width:34px; height:34px; border-radius:50%; background:linear-gradient(135deg,var(--purple),var(--purple-light)); color:#fff; display:flex; align-items:center; justify-content:center; font-size:14px; font-weight:bold; }
.cm-body { flex:1; min-width:0; }
.cm-meta { display:flex; align-items:center; gap:8px; flex-wrap:wrap; }
.cm-name { font-size:13px; font-weight:bold; color:var(--purple-dark); }
.cm-time { font-size:12px; color:var(--muted); }
.cm-pending { font-size:11px; background:#FFF6E5; color:#A9701A; border-radius:8px; padding:1px 6px; }
.cm-text { margin:6px 0 8px; white-space:pre-wrap; word-break:break-word; }
.cm-actions { display:flex; align-items:center; gap:14px; }
.cm-btn { background:none; border:0; padding:0; font-size:13px; color:var(--muted); cursor:pointer; font-family:inherit; display:inline-flex; align-items:center; gap:4px; }
.cm-btn:hover { color:var(--purple); text-decoration:none; }
.cm-like.on { color:#D94A6A; }
.cm-like.on .cm-like-icon { color:#D94A6A; }
.cm-btn-quiet { color:#B9B3C6; }
.cm-btn-quiet:hover { color:#D94A6A; }
.cm-reply-wrap summary { list-style:none; }
.cm-reply-wrap summary::-webkit-details-marker { display:none; }
.cm-reply-form { margin:8px 0 0; }
.cm-reply-form .btn { margin-top:6px; }
.cm-report { display:inline; }
.cm-replies { margin-top:12px; padding-left:14px; border-left:2px solid var(--purple-bg); }
.cm-reply { display:flex; gap:10px; padding:10px 0; }
.cm-reply .cm-avatar { flex:0 0 28px; width:28px; height:28px; font-size:12px; }

/* 客服悬浮条 */
.svc { position:fixed; right:22px; bottom:26px; z-index:900; display:flex; flex-direction:column; align-items:flex-end; gap:10px; }
.svc-fab { display:flex; align-items:center; gap:6px; border:0; cursor:pointer; background:linear-gradient(135deg,var(--purple),var(--purple-light)); color:#fff; padding:12px 16px; border-radius:26px; box-shadow:0 6px 20px rgba(107,70,193,.35); font-size:14px; font-family:inherit; }
.svc-fab-icon { font-size:16px; }
.svc-panel { display:none; width:250px; background:#fff; border:1px solid var(--border); border-radius:14px; box-shadow:0 10px 34px rgba(60,40,120,.18); padding:16px; }
.svc.open .svc-panel { display:block; }
.svc-panel-head { display:flex; justify-content:space-between; align-items:center; }
.svc-close { border:0; background:none; font-size:20px; line-height:1; color:var(--muted); cursor:pointer; }
.svc-hours { margin:4px 0 12px; font-size:12px; color:var(--muted); }
.svc-qr { text-align:center; }
.svc-qr img { width:180px; height:180px; object-fit:contain; border:1px solid var(--border); border-radius:8px; }
.svc-qr-tip { font-size:12px; color:var(--muted); margin:8px 0 0; }
.svc-qq { display:block; text-align:center; margin-top:12px; background:var(--purple-bg); border-radius:8px; padding:9px; font-size:13px; }
.svc-note { font-size:12px; color:var(--muted); margin:12px 0 0; }
@media (max-width: 640px) {
  .svc { right:14px; bottom:16px; }
  .svc-fab-text { display:none; }
  .svc-panel { width:220px; }
  .svc-qr img { width:160px; height:160px; }
}

/* 后台：评论/作业 */
.admin-tabs { display:flex; gap:8px; margin-bottom:16px; flex-wrap:wrap; }
.tab { padding:8px 14px; border-radius:8px; background:#fff; border:1px solid var(--border); font-size:14px; color:var(--text); }
.tab:hover { text-decoration:none; border-color:var(--purple-light); }
.tab.on { background:var(--purple); border-color:var(--purple); color:#fff; }
.tab-n { display:inline-block; margin-left:4px; background:#fff; color:var(--purple); border-radius:9px; padding:0 6px; font-size:12px; }
.tab.on .tab-n { background:rgba(255,255,255,.25); color:#fff; }
.tab-n-warn { background:#D94A6A; color:#fff; }
.adm-cm, .adm-sub { background:#fff; border:1px solid var(--border); border-radius:12px; padding:16px 18px; margin-bottom:12px; }
.adm-cm-head { display:flex; align-items:center; gap:10px; flex-wrap:wrap; margin-bottom:8px; }
.adm-cm-name { font-weight:bold; font-size:14px; }
.adm-cm-loc { font-size:12px; color:var(--purple); background:var(--purple-bg); border-radius:8px; padding:1px 8px; }
.adm-cm-time { font-size:12px; color:var(--muted); }
.adm-flag { font-size:11px; border-radius:8px; padding:1px 7px; background:var(--purple-bg); color:var(--purple); }
.adm-flag-warn { background:#FDECEF; color:#C0344F; }
.adm-flag-ok { background:#E9F7EE; color:#1F7A44; }
.adm-cm-text { white-space:pre-wrap; word-break:break-word; margin:8px 0 12px; }
.adm-cm-actions { display:flex; gap:8px; flex-wrap:wrap; align-items:center; }
.adm-cm-actions form { margin:0; }
.btn-danger { background:#D94A6A; color:#fff; border:1px solid #D94A6A; }
.btn-quiet { background:#F4F2F8; color:var(--muted); border:1px solid var(--border); }
.grade-form { margin-top:10px; display:flex; flex-direction:column; gap:8px; max-width:560px; }
.grade-score { width:180px; }
.inline-label { font-size:14px; }