/* ========================= 公共论坛 ========================= */
.forum-page { max-width: 1180px; }
.forum-hero {
  position: relative; overflow: hidden; display: flex; align-items: flex-end; gap: 28px;
  padding: 30px 32px; border: 1px solid var(--border); border-radius: var(--radius-l);
  background:
    radial-gradient(520px 220px at 8% 0%, color-mix(in srgb, var(--brand-2) 19%, transparent), transparent 70%),
    radial-gradient(460px 220px at 96% 5%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 72%),
    var(--surface);
  box-shadow: var(--shadow-sm);
}
.forum-hero::after {
  content: ""; position: absolute; width: 180px; height: 180px; border-radius: 50%;
  right: -70px; bottom: -105px; border: 30px solid color-mix(in srgb, var(--brand) 9%, transparent);
}
.forum-hero > div:first-child { flex: 1; min-width: 0; position: relative; z-index: 1; }
.forum-kicker {
  display: inline-block; margin-bottom: 7px; font-family: var(--mono); font-size: 10.5px;
  font-weight: 800; letter-spacing: 1.7px; color: var(--brand);
}
.forum-hero h1 { margin: 0 0 7px; font-size: 31px; letter-spacing: -1px; }
.forum-hero p { margin: 0; max-width: 700px; color: var(--text-2); font-size: 14px; line-height: 1.85; }
.forum-stat-grid {
  position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, minmax(60px, 1fr));
  gap: 8px; min-width: 390px;
}
.forum-stat {
  padding: 10px 8px; border: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
  border-radius: 13px; text-align: center; background: color-mix(in srgb, var(--surface) 82%, transparent);
  backdrop-filter: blur(10px);
}
.forum-stat b { display: block; font-size: 18px; line-height: 1.25; }
.forum-stat span { display: block; font-size: 11px; color: var(--text-3); }
.forum-live {
  grid-column: 1 / -1; display: flex; align-items: center; justify-content: center; gap: 7px;
  padding: 5px 9px; border-radius: 999px; color: var(--brand); background: var(--brand-soft);
  font-size: 11.5px; font-weight: 700;
}
.forum-live i { width: 7px; height: 7px; border-radius: 50%; background: currentColor; box-shadow: 0 0 0 4px color-mix(in srgb, currentColor 14%, transparent); }
.forum-live.connecting, .forum-live.fallback { color: var(--warn); background: color-mix(in srgb, var(--warn) 12%, transparent); }
.forum-live.fallback i { animation: forumPulse 1.3s ease-in-out infinite; }
@keyframes forumPulse { 50% { opacity: .28; } }

.forum-composer {
  margin-top: 18px; padding: 22px 24px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); box-shadow: var(--shadow-sm);
}
.forum-composer-top { display: flex; align-items: flex-start; gap: 14px; margin-bottom: 15px; }
.forum-composer-top h3 { margin: 0; font-size: 17px; }
.forum-composer-top > .chip { margin-left: auto; }
.forum-compose-grid { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 12px; }
.forum-title-field { min-width: 0; }
.forum-composer textarea { min-height: 122px; resize: vertical; line-height: 1.75; }
.forum-compose-foot { display: flex; align-items: center; gap: 14px; margin-top: 4px; }
.forum-compose-foot > span { flex: 1; color: var(--text-3); font-size: 12px; }
.forum-login-note {
  display: flex; align-items: center; gap: 14px; margin-top: 18px; padding: 18px 21px;
  border: 1px dashed var(--border-2); border-radius: var(--radius); background: var(--surface-2);
}
.forum-login-note > div:first-child {
  width: 42px; height: 42px; flex: none; display: grid; place-items: center;
  border-radius: 13px; color: var(--brand); background: var(--brand-soft);
}
.forum-login-note > div:nth-child(2) { flex: 1; }
.forum-login-note b { font-size: 14.5px; }
.forum-login-note p { margin: 2px 0 0; color: var(--text-3); font-size: 12.5px; }

.forum-board { margin-top: 26px; }
.forum-toolbar { display: flex; align-items: center; gap: 10px; margin-bottom: 13px; }
.forum-toolbar .seg { flex: none; }
.forum-search { width: 280px; margin-left: auto; cursor: text; }
.forum-search:focus-within { width: 330px; }
.forum-category { width: 142px; flex: none; }
.forum-toolbar .icon-btn { border-color: var(--border); background: var(--surface); }
.forum-toolbar .icon-btn:hover { border-color: var(--border-2); }

#forumList { display: grid; gap: 11px; }
.forum-card {
  position: relative; overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); box-shadow: var(--shadow-xs); transition: all .22s var(--ease);
}
.forum-card:hover { transform: translateY(-2px); border-color: var(--border-2); box-shadow: var(--shadow-sm); }
.forum-card.pinned { border-color: color-mix(in srgb, var(--brand) 34%, var(--border)); }
.forum-card.pinned::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 3px; background: linear-gradient(var(--brand), var(--accent)); }
.forum-card-main { padding: 18px 20px; }
.forum-author { display: flex; align-items: center; gap: 10px; min-width: 0; }
.forum-avatar {
  width: 36px; height: 36px; flex: none; display: grid; place-items: center; border-radius: 12px;
  color: #fff; font-weight: 800; font-size: 14px;
  background: linear-gradient(135deg, var(--brand-2), var(--accent));
}
.forum-author-main { min-width: 0; }
.forum-author-name { display: flex; align-items: center; gap: 7px; font-size: 13.5px; font-weight: 700; }
.forum-role { padding: 1px 7px; font-size: 10.5px; }
.forum-time { color: var(--text-3); font-size: 11.5px; margin-top: 1px; }
.forum-card-head { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; margin: 12px 0 8px; }
.forum-title { display: block; color: var(--text); font-size: 18px; font-weight: 750; letter-spacing: -.35px; line-height: 1.45; }
.forum-title:hover { color: var(--brand); }
.forum-excerpt { margin: 7px 0 14px; color: var(--text-2); font-size: 13.5px; line-height: 1.75; }
.forum-card-foot, .forum-post-foot, .forum-comment-foot {
  display: flex; align-items: center; flex-wrap: wrap; gap: 7px;
}
.forum-action {
  display: inline-flex; align-items: center; gap: 6px; padding: 5px 9px; border: 1px solid transparent;
  border-radius: 9px; background: transparent; color: var(--text-2); font-size: 12.5px; font-weight: 650;
  cursor: pointer; transition: all .18s var(--ease); text-decoration: none;
}
.forum-action:hover { background: var(--surface-3); color: var(--text); }
.forum-action.liked { color: var(--danger); background: var(--danger-soft); }
.forum-action.muted { color: var(--text-3); cursor: default; }
.forum-action.muted:hover { background: transparent; color: var(--text-3); }
.forum-spacer { flex: 1; }
.forum-last { color: var(--text-3); font-size: 11.5px; white-space: nowrap; }
.forum-skeleton { display: grid; gap: 11px; }
.forum-skeleton > div {
  height: 160px; border-radius: var(--radius); border: 1px solid var(--border);
  background: linear-gradient(90deg, var(--surface-3) 25%, var(--surface-2) 37%, var(--surface-3) 63%);
  background-size: 400% 100%; animation: shimmer 1.3s ease-in-out infinite;
}
.forum-skeleton.detail > div { height: 100px; }
.forum-skeleton.detail > div:first-child { height: 230px; }

.forum-empty {
  padding: 58px 20px; text-align: center; color: var(--text-3);
  border: 1px dashed var(--border-2); border-radius: var(--radius); background: color-mix(in srgb, var(--surface) 74%, transparent);
}
.forum-empty.small { padding: 28px 16px; font-size: 13px; }
.forum-empty-icon { width: 52px; height: 52px; margin: 0 auto 12px; display: grid; place-items: center; border-radius: 17px; color: var(--brand); background: var(--brand-soft); }
.forum-empty h3 { margin: 0 0 6px; color: var(--text-2); font-size: 15.5px; }
.forum-empty p { margin: 0; font-size: 12.5px; }

.forum-pager { display: flex; justify-content: center; gap: 5px; margin-top: 20px; }
.forum-pager button {
  min-width: 34px; height: 34px; padding: 0 10px; border: 1px solid var(--border); border-radius: 9px;
  background: var(--surface); color: var(--text-2); cursor: pointer;
}
.forum-pager button:hover:not(:disabled), .forum-pager button.active { border-color: var(--brand-2); color: var(--brand); background: var(--brand-soft); }
.forum-pager button:disabled { opacity: .4; cursor: default; }

.forum-detail-top { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.forum-detail-top > .forum-live { margin-left: auto; width: auto; padding: 5px 11px; }
.forum-post-detail {
  position: relative; overflow: hidden; padding: 27px 30px; border: 1px solid var(--border);
  border-radius: var(--radius-l); background: var(--surface); box-shadow: var(--shadow-sm);
}
.forum-post-detail.pinned { border-color: color-mix(in srgb, var(--brand) 38%, var(--border)); }
.forum-post-head { display: flex; align-items: flex-start; gap: 16px; }
.forum-post-badges { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 6px; margin-left: auto; }
.forum-post-detail h1 { margin: 22px 0 12px; font-size: 27px; line-height: 1.4; letter-spacing: -.7px; }
.forum-post-body, .forum-comment-body {
  color: var(--text); font-size: 14.5px; line-height: 1.95; white-space: pre-wrap; overflow-wrap: anywhere;
}
.forum-post-foot { margin-top: 23px; padding-top: 15px; border-top: 1px dashed var(--border); }
.forum-text-btn {
  border: 0; background: transparent; color: var(--text-3); padding: 5px 7px; border-radius: 7px;
  font-size: 12.5px; cursor: pointer;
}
.forum-text-btn:hover { color: var(--brand); background: var(--brand-soft); }
.forum-text-btn.danger:hover { color: var(--danger); background: var(--danger-soft); }
.forum-inline-edit { margin-top: 18px; padding: 17px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface-2); }
.forum-inline-edit textarea { min-height: 100px; resize: vertical; }
.forum-inline-edit > div:last-child { display: flex; gap: 8px; }
.forum-comments { margin-top: 22px; }
.forum-comments-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 12px; }
.forum-comments-head h2 { margin: 0; font-size: 19px; }
.forum-comments-head h2 span { color: var(--brand); font-size: 14px; }
.forum-comments-head > span { margin-left: auto; color: var(--text-3); font-size: 12px; }
.forum-comment-form {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; align-items: end;
  padding: 15px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface);
}
.forum-comment-form textarea { min-height: 84px; resize: vertical; }
.forum-comment-list { display: grid; gap: 10px; margin-top: 12px; }
.forum-comment { padding: 16px 18px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-xs); }
.forum-comment.deleted { background: var(--surface-2); border-style: dashed; }
.forum-comment-body { margin: 12px 0 11px; font-size: 14px; }
.forum-comment-foot { padding-top: 8px; border-top: 1px dashed var(--border); }
.forum-deleted { color: var(--text-3); font-size: 12.5px; text-align: center; }
.forum-closed-note { padding: 16px; border: 1px dashed var(--border-2); border-radius: var(--radius); color: var(--text-3); font-size: 13px; text-align: center; }

@media (max-width: 980px) {
  .forum-hero { align-items: stretch; flex-direction: column; }
  .forum-stat-grid { min-width: 0; width: 100%; }
  .forum-toolbar { flex-wrap: wrap; }
  .forum-search { order: 5; width: 100%; margin-left: 0; }
  .forum-search:focus-within { width: 100%; }
}
@media (max-width: 680px) {
  .forum-hero { padding: 23px 20px; }
  .forum-hero h1 { font-size: 26px; }
  .forum-stat-grid { grid-template-columns: repeat(2, 1fr); }
  .forum-composer { padding: 18px 16px; }
  .forum-composer-top { flex-direction: column; }
  .forum-composer-top > .chip { margin-left: 0; }
  .forum-compose-grid { grid-template-columns: 1fr; }
  .forum-compose-foot { align-items: flex-end; flex-direction: column; }
  .forum-compose-foot .btn { width: 100%; }
  .forum-login-note { align-items: flex-start; flex-wrap: wrap; }
  .forum-login-note .btn { width: 100%; }
  .forum-post-detail { padding: 21px 17px; }
  .forum-post-detail h1 { font-size: 22px; }
  .forum-post-head { flex-direction: column; }
  .forum-post-badges { justify-content: flex-start; margin-left: 0; }
  .forum-comment-form { grid-template-columns: 1fr; }
  .forum-comment-form .btn { width: 100%; }
  .forum-last { display: none; }
  .forum-category { flex: 1; min-width: 120px; }
}


/* ========================= 手机端论坛优化 ========================= */
@media (max-width: 820px) {
  .forum-page { padding-bottom: 112px; }
  .forum-hero { gap: 18px; padding: 22px 18px; border-radius: 20px; }
  .forum-hero h1 { font-size: 27px; }
  .forum-hero p { font-size: 13.2px; line-height: 1.75; }
  .forum-stat-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; }
  .forum-stat { padding: 9px 3px; border-radius: 12px; }
  .forum-stat b { font-size: 17px; }
  .forum-stat span { font-size: 10px; }
  .forum-live { margin-top: 2px; }

  .forum-login-note {
    align-items: flex-start;
    flex-direction: column;
    gap: 11px;
    padding: 15px;
    border-radius: 15px;
  }
  .forum-login-note .btn { width: 100%; justify-content: center; }
  .forum-composer { padding: 17px 15px; border-radius: 15px; }
  .forum-composer-top { flex-direction: row; gap: 10px; }
  .forum-composer-top > .chip { margin-left: auto; font-size: 10.5px; }
  .forum-compose-grid { grid-template-columns: 1fr; gap: 10px; }
  .forum-composer textarea { min-height: 104px; }
  .forum-compose-foot { align-items: stretch; flex-direction: column; gap: 9px; }
  .forum-compose-foot .btn { width: 100%; justify-content: center; }

  .forum-toolbar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 38px;
    gap: 8px;
  }
  .forum-toolbar .seg { grid-column: 1 / -1; width: 100%; }
  .forum-toolbar .seg button { flex: 1; padding: 7px 8px; }
  .forum-search { grid-column: 1 / -1; width: 100%; margin-left: 0; }
  .forum-search:focus-within { width: 100%; }
  .forum-category { grid-column: 1; width: 100%; }
  #forumReload { grid-column: 2; width: 38px; height: 38px; }
  #forumList { gap: 9px; }
  .forum-card-main { padding: 15px; }
  .forum-card-head { margin: 10px 0 7px; }
  .forum-title { font-size: 17px; }
  .forum-excerpt { font-size: 13px; margin: 6px 0 12px; }
  .forum-card-foot { gap: 3px; }
  .forum-action { min-height: 36px; padding: 6px 8px; }
  .forum-last { display: none; }
  .forum-empty { padding: 42px 16px; border-radius: 15px; }

  .forum-detail-top { margin-bottom: 10px; }
  .forum-detail-top > .forum-live { padding: 4px 8px; font-size: 10.5px; }
  .forum-post-detail { padding: 20px 16px; border-radius: 18px; }
  .forum-post-head { flex-direction: column; gap: 11px; }
  .forum-post-badges { justify-content: flex-start; margin-left: 0; }
  .forum-post-detail h1 { margin: 17px 0 10px; font-size: 22px; }
  .forum-post-body { font-size: 14.2px; line-height: 1.85; }
  .forum-post-foot { gap: 4px; margin-top: 18px; padding-top: 12px; }
  .forum-post-foot .forum-spacer { display: none; }
  .forum-text-btn { min-height: 34px; padding: 6px 9px; background: var(--surface-3); }
  .forum-inline-edit { padding: 14px; }
  .forum-comments { margin-top: 18px; }
  .forum-comments-head { flex-wrap: wrap; gap: 5px 10px; }
  .forum-comments-head > span { margin-left: 0; flex-basis: 100%; }
  .forum-comment-form { grid-template-columns: 1fr; padding: 13px; border-radius: 15px; }
  .forum-comment-form .btn { width: 100%; justify-content: center; }
  .forum-comment { padding: 14px; border-radius: 15px; }
  .forum-comment-body { font-size: 13.8px; line-height: 1.8; }
  .forum-comment-foot { gap: 3px; }
  .forum-closed-note { padding: 14px; border-radius: 14px; }
}