:root{--ink:#171817;--muted:#6d706d;--line:#deded8;--surface:#fff;--canvas:#f5f5f1;--accent:#e8642d;--accent-soft:#fff0e9;--teal:#197c78}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;color:var(--ink);background:var(--canvas);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;letter-spacing:0}button,input,select,textarea{font:inherit;letter-spacing:0}button{color:inherit}a{color:inherit;text-decoration:none}.site-header{height:64px;padding:0 26px;display:flex;align-items:center;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line);background:#fff}.site-header nav{display:flex;align-items:center;gap:5px}.site-brand{display:flex;align-items:center;gap:10px}.site-brand>span{width:34px;height:34px;display:grid;place-items:center;border-radius:6px;background:var(--ink);color:#fff;font-size:12px;font-weight:800}.site-brand strong{font-size:17px}.icon-link{min-height:38px;padding:0 11px;display:inline-flex;align-items:center;gap:7px;border:0;border-radius:6px;background:transparent;color:#555853;font-size:13px;font-weight:650;cursor:pointer}.icon-link:hover{background:#f3f3ef}.icon-link svg{width:17px}.auth-layout{min-height:calc(100vh - 64px);display:grid;place-items:center;padding:36px 18px}.auth-panel{width:min(460px,100%);padding:28px;border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 16px 45px rgba(23,24,23,.07)}.segmented{height:38px;padding:3px;display:grid;grid-template-columns:1fr 1fr;border-radius:6px;background:#efefeb}.segmented button{border:0;border-radius:4px;background:transparent;font-size:13px;font-weight:700;cursor:pointer}.segmented button.active{background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.1)}.auth-heading{margin:27px 0 22px}.auth-heading h1,.section-heading h1,.community-sidebar h1{margin:0;font-size:25px}.auth-heading p{margin:7px 0 0;color:var(--muted);font-size:13px}.auth-panel form,.profile-section form,dialog form{display:grid;gap:15px}label{display:grid;gap:7px;color:#3d403c;font-size:12px;font-weight:700}input,select,textarea{width:100%;border:1px solid #d5d5cf;border-radius:5px;background:#fff;color:var(--ink);outline:0}input,select{height:42px;padding:0 11px}textarea{padding:10px 11px;resize:vertical}input:focus,select:focus,textarea:focus{border-color:#777a75;box-shadow:0 0 0 3px rgba(30,31,30,.07)}.form-pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}.primary-button,.secondary-button{min-height:40px;padding:0 14px;display:inline-flex;align-items:center;justify-content:center;gap:7px;border-radius:5px;font-weight:750;cursor:pointer}.primary-button{border:0;background:var(--ink);color:#fff}.primary-button:hover{background:#343634}.primary-button svg{width:17px}.secondary-button{border:1px solid var(--line);background:#fff}.form-message,.toast{padding:10px 12px;border-radius:5px;background:#e7f4f1;color:#17665f;font-size:13px}.form-message.error,.toast.error{background:#fdebe6;color:#a43d1f}.profile-layout{width:min(1080px,calc(100% - 32px));margin:34px auto 70px;display:grid;gap:18px}.profile-section{padding:24px;border:1px solid var(--line);border-radius:7px;background:#fff}.section-heading{margin-bottom:20px;display:flex;align-items:flex-end;justify-content:space-between;gap:16px}.section-heading p,.eyebrow{margin:0 0 5px;color:var(--accent);font-size:10px;font-weight:800}.section-heading h2{margin:0;font-size:20px}.account-id,.section-heading>span{color:var(--muted);font-size:12px}.form-actions{display:flex;justify-content:flex-end;gap:8px}.form-actions .primary-button{width:auto}.favorite-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.favorite-item{min-width:0;padding:15px;border:1px solid var(--line);border-radius:6px}.favorite-item strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.favorite-item p{margin:5px 0 13px;color:var(--muted);font-size:12px}.favorite-item a{color:var(--accent);font-size:12px;font-weight:700}.empty-block{padding:32px;text-align:center;color:var(--muted);background:#fafaf7}.community-layout{height:calc(100vh - 64px);display:grid;grid-template-columns:250px 390px minmax(0,1fr)}.community-sidebar{padding:25px 18px;display:flex;flex-direction:column;gap:18px;border-right:1px solid var(--line);background:#f8f8f5}.community-sidebar h1{font-size:21px}.search-box{position:relative}.search-box svg{position:absolute;z-index:1;left:11px;bottom:12px;width:16px;color:#777}.search-box input{padding-left:35px}.topic-list-panel{min-width:0;display:flex;flex-direction:column;border-right:1px solid var(--line);background:#fff}.list-heading{min-height:58px;padding:0 14px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);font-size:12px}.pager{display:flex;align-items:center;gap:8px;color:var(--muted)}.pager button,.dialog-heading button,.inline-icon{width:32px;height:32px;display:grid;place-items:center;border:1px solid var(--line);border-radius:5px;background:#fff;cursor:pointer}.pager svg,.dialog-heading svg,.inline-icon svg{width:15px}.pager button:disabled{opacity:.35}.topic-list{overflow:auto}.topic-item{width:100%;padding:16px;border:0;border-bottom:1px solid #ecece7;background:#fff;text-align:left;cursor:pointer}.topic-item:hover,.topic-item.active{background:#faf7f4}.topic-item.active{box-shadow:inset 3px 0 var(--accent)}.topic-model{color:var(--teal);font-size:11px;font-weight:750}.topic-item h2{margin:7px 0;font-size:15px;line-height:1.35}.topic-item p{margin:0;color:var(--muted);font-size:12px;line-height:1.5}.topic-meta{margin-top:10px;display:flex;justify-content:space-between;color:#898b88;font-size:11px}.topic-detail{min-width:0;padding:28px clamp(20px,4vw,56px);overflow:auto;background:#fff}.detail-empty{height:100%;display:grid;place-content:center;text-align:center;color:var(--muted)}.detail-empty svg{width:34px;margin:auto}.detail-empty h2{margin:12px 0 4px;color:var(--ink);font-size:18px}.detail-empty p{margin:0}.detail-header{padding-bottom:20px;border-bottom:1px solid var(--line)}.detail-header h2{margin:8px 0 10px;font-size:25px;line-height:1.3}.detail-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;color:var(--muted);font-size:12px}.detail-actions{margin-left:auto;display:flex;gap:5px}.detail-content{padding:24px 0;white-space:pre-wrap;line-height:1.75}.reply-heading{margin:8px 0 12px;font-size:14px}.reply-list{display:grid;gap:8px}.reply-item{padding:14px;border:1px solid var(--line);border-radius:6px;background:#fafaf7}.reply-author{display:flex;align-items:center;justify-content:space-between;font-size:12px}.reply-author span{color:var(--muted)}.reply-item p{margin:10px 0 0;white-space:pre-wrap;font-size:13px;line-height:1.6}.reply-form{margin-top:14px;display:flex;gap:8px}.reply-form textarea{min-height:72px}.reply-form .primary-button{align-self:flex-end}.login-prompt{margin-top:14px;padding:13px;border:1px dashed #ccc;border-radius:6px;color:var(--muted);font-size:13px}.login-prompt a{color:var(--accent);font-weight:700}dialog{width:min(590px,calc(100% - 28px));padding:0;border:1px solid var(--line);border-radius:7px;box-shadow:0 24px 70px rgba(0,0,0,.2)}dialog::backdrop{background:rgba(20,21,20,.38)}dialog form{padding:22px}.dialog-heading{display:flex;align-items:center;justify-content:space-between}.dialog-heading h2{margin:0;font-size:19px}.toast{position:fixed;z-index:30;right:20px;bottom:20px;box-shadow:0 8px 25px rgba(0,0,0,.12)}
@media(max-width:980px){.community-layout{height:auto;min-height:calc(100vh - 64px);grid-template-columns:220px minmax(0,1fr)}.topic-detail{grid-column:1/-1;min-height:420px;border-top:1px solid var(--line)}.favorite-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:680px){.site-header{height:58px;padding:0 14px}.icon-link span{display:none}.community-layout{display:block}.community-sidebar{padding:18px;border-right:0;border-bottom:1px solid var(--line)}.topic-list-panel{max-height:480px;border-right:0}.topic-detail{padding:22px 16px}.form-pair,.favorite-grid{grid-template-columns:1fr}.auth-panel,.profile-section{padding:20px}.profile-layout{width:calc(100% - 22px);margin-top:18px}.reply-form{display:grid}}
.reply-form .primary-button{flex:0 0 auto;min-width:64px;white-space:nowrap}.reply-author>span{display:flex;align-items:center;gap:5px}.reply-author .inline-icon{display:inline-grid;flex:0 0 32px;vertical-align:middle}
.contact-display{min-height:390px;padding:26px 4px 4px}.contact-display-heading p{margin:0 0 7px;color:var(--accent);font-size:10px;font-weight:800}.contact-display-heading h2{margin:0;font-size:24px}.contact-display-heading>span{display:block;margin-top:9px;color:var(--muted);font-size:12px;line-height:1.7}.contact-information{margin-top:22px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.contact-information>div{min-width:0;padding:15px;display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:6px;background:#f8fbfb}.contact-information svg{width:20px;color:var(--teal)}.contact-information span{min-width:0;display:grid;gap:4px}.contact-information small{color:var(--muted)}.contact-information strong{overflow-wrap:anywhere}.contact-qr{grid-row:span 3;margin:0;padding:13px;display:grid;place-items:center;border:1px solid var(--line);border-radius:6px;background:#fff}.contact-qr img{width:min(190px,100%);aspect-ratio:1;object-fit:contain}.contact-qr figcaption{margin-top:8px;color:var(--muted);font-size:11px}.contact-empty{grid-column:1/-1;min-height:160px;display:grid!important;place-items:center!important;color:var(--muted)}
.profile-stats{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:9px}.profile-stats>div{padding:15px 10px;text-align:center;border:1px solid var(--line);border-radius:6px;background:#fafaf7}.profile-stats strong{display:block;font-size:22px}.profile-stats span{display:block;margin-top:4px;color:var(--muted);font-size:11px}.feedback-layout{width:min(1040px,calc(100% - 32px));min-height:calc(100vh - 64px);margin:auto;display:grid;grid-template-columns:minmax(0,.85fr) minmax(420px,1.15fr);gap:54px;align-items:center;padding:48px 0}.feedback-intro h1{margin:5px 0 14px;font-size:34px}.feedback-intro>p:not(.eyebrow){max-width:480px;color:var(--muted);line-height:1.7}.contact-notes{margin-top:28px;display:grid;gap:10px}.contact-notes>div{padding:14px;display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:6px;background:#fff}.contact-notes svg{width:20px;color:var(--teal)}.contact-notes span{display:grid;gap:3px}.contact-notes small{color:var(--muted)}.feedback-form-panel{padding:26px;border:1px solid var(--line);border-radius:7px;background:#fff}.feedback-form-panel form{margin-top:20px;display:grid;gap:15px}.feedback-form-panel .form-message{margin-top:14px}
.topic-author-line,.author-chip{display:inline-flex!important;align-items:center;gap:6px}.topic-author-line .user-avatar{width:22px;height:22px;border-width:1px;font-size:9px}.author-chip .user-avatar{width:30px;height:30px;border-width:1px;font-size:11px}.reply-author-main{display:flex;align-items:center;gap:8px}.reply-author-main .user-avatar{width:34px;height:34px;border-width:1px;font-size:11px}.reply-author-copy{display:grid;gap:2px}.reply-author-copy small{color:var(--muted);font-size:10px}
@media(max-width:760px){.profile-stats{grid-template-columns:repeat(3,minmax(0,1fr))}.feedback-layout{width:calc(100% - 24px);min-height:auto;grid-template-columns:1fr;gap:24px;padding:28px 0}.feedback-form-panel{padding:20px}.feedback-intro h1{font-size:28px}}

/* Keep navigation surfaces stationary and confine scrolling to page content. */
html,body{height:100%;overflow:hidden}
body{display:grid;grid-template-rows:64px minmax(0,1fr)}
.site-header{position:relative;z-index:20}
.auth-layout{min-height:0;overflow-y:auto;overscroll-behavior:contain}
.profile-layout{width:100%;height:100%;min-height:0;margin:0;padding:34px max(16px,calc((100% - 1080px)/2)) 70px;align-content:start;overflow-y:auto;overscroll-behavior:contain}
.feedback-layout{width:100%;height:100%;min-height:0;margin:0;padding:48px max(16px,calc((100% - 1040px)/2));overflow-y:auto;overscroll-behavior:contain}
.community-layout{height:auto;min-height:0;overflow:hidden}
.community-sidebar{min-height:0;overflow-y:auto;overscroll-behavior:contain}
.topic-list-panel,.topic-detail{min-height:0}

@media(max-width:980px){
  .community-layout{height:auto;min-height:0;grid-template-rows:minmax(0,45%) minmax(0,55%)}
  .community-sidebar,.topic-list-panel{min-height:0}
  .topic-detail{min-height:0}
}
@media(max-width:680px){
  body{grid-template-rows:58px minmax(0,1fr)}
  .community-layout{display:block;height:100%;min-height:0;overflow-y:auto;overscroll-behavior:contain}
  .community-sidebar{overflow:visible}
  .profile-layout{padding:18px 11px 50px}
  .feedback-layout{height:100%;width:100%;padding:28px 12px;overflow-y:auto}
}

.topic-dialog{width:min(680px,calc(100% - 28px));max-height:calc(100vh - 28px);overflow:auto}
.model-search-field>span{position:relative;display:block}.model-search-field svg{position:absolute;left:11px;top:13px;width:16px;color:var(--muted);pointer-events:none}.model-search-field input{padding-left:35px}
.topic-image-field{display:grid;gap:9px}.topic-image-toolbar{display:flex;align-items:center;justify-content:space-between;color:#3d403c;font-size:12px;font-weight:700}.topic-image-toolbar span:last-child{color:var(--muted);font-size:11px;font-weight:650}
.topic-image-picker{min-height:44px;display:flex;align-items:center;justify-content:center;gap:8px;border:1px dashed #9ebfc1;border-radius:6px;color:#075d72;background:#eff9f8;font-size:12px;font-weight:750;cursor:pointer}.topic-image-picker:hover{border-color:#078c98;background:#e4f6f4}.topic-image-picker svg{width:17px}
.topic-image-previews{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.topic-image-previews figure{position:relative;aspect-ratio:4/3;margin:0;overflow:hidden;border:1px solid var(--line);border-radius:6px;background:#eef0ec}.topic-image-previews img{width:100%;height:100%;display:block;object-fit:cover}.topic-image-previews button{position:absolute;right:5px;top:5px;width:28px;height:28px;display:grid;place-items:center;border:1px solid #ffffff80;border-radius:5px;color:#fff;background:#14252bcc;cursor:pointer}.topic-image-previews button:hover{background:#9f382c}.topic-image-previews svg{width:14px}
.topic-image-grid{margin:0 0 24px;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(190px,100%),1fr));gap:8px}.topic-image-grid img{width:100%;max-height:460px;display:block;object-fit:cover;border:1px solid var(--line);border-radius:7px;background:#eef0ec}
button:disabled{cursor:not-allowed;opacity:.55}
@media(max-width:520px){.topic-image-previews{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-dialog form{padding:18px}}