.tut-bg{position:fixed;top:0;right:0;bottom:0;left:0;z-index:90;display:flex;align-items:center;justify-content:center;padding:12px;background:#00000047;backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(3px)}.tut-dlg{--w: min(960px, 94vw);width:var(--w);background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:0;box-shadow:var(--box-shadow);display:grid;grid-template-rows:auto auto calc(var(--w) * .6);overflow:hidden;outline:none}.tut-bar{position:relative;display:flex;align-items:flex-start;gap:16px;padding:18px 20px 12px 24px}.tut-title{flex:1;margin:0;font-size:18px;font-weight:600;line-height:1.3;letter-spacing:-.01em;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere}.tut-preview-tag{color:var(--muted)}.tut-x{width:28px;height:28px;padding:0;border:0;border-radius:2px;background:transparent;color:var(--muted);cursor:pointer}.tut-x:hover{color:var(--text);background:var(--row-hover)}.tut-strip{display:flex;gap:4px;padding:0 24px 16px}.tut-seg{flex:1;height:2px;background:var(--line)}.tut-seg-done{background:var(--text)}.tut-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.tut-main{min-height:0;display:grid;border-top:1px solid var(--line)}.tut-split{grid-template-columns:45% 1fr}.tut-wide{grid-template-rows:auto minmax(0,1fr)}.tut-text-only{grid-template-columns:1fr}.tut-frame{position:relative;overflow:hidden;border-radius:0;background:var(--accent2)}.tut-split .tut-frame{aspect-ratio:3 / 4;border-right:1px solid var(--line)}.tut-wide .tut-frame{aspect-ratio:12 / 5;border-bottom:1px solid var(--line)}.tut-frame img{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;display:block;border-radius:0}.tut-text{min-width:0;min-height:0;display:flex;flex-direction:column}.tut-body{flex:1 1 auto;min-height:0;overflow:auto;padding:22px 24px 8px;font-size:15px;line-height:1.6;max-width:60ch;overflow-wrap:anywhere}.tut-nav{flex:0 0 auto;display:flex;justify-content:flex-end;gap:8px;padding:12px 20px 18px}.tut-nav button{border-radius:2px;padding:8px 16px;font:inherit;cursor:pointer}.tut-back{border:0;background:transparent;color:var(--muted)}.tut-back:hover{color:var(--text)}.tut-next{border:1px solid var(--accent);background:var(--accent);color:var(--on-primary)}@media(max-width:639px){.tut-dlg{grid-template-rows:auto auto minmax(0,1fr);max-height:92vh}.tut-main{overflow:auto}.tut-split,.tut-stacked{grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr)}.tut-split .tut-frame,.tut-stacked .tut-frame{aspect-ratio:3 / 4;border-right:0;border-bottom:1px solid var(--line)}}