:root{--about-arrow-color:#5b7fd0;--about-arrow-bg:rgba(105,138,211,.10);--about-arrow-border:rgba(105,138,211,.28)}body.tb{--about-arrow-color:#93ace4;--about-arrow-bg:rgba(97,123,181,.20);--about-arrow-border:rgba(147,172,228,.30)}.about-ai{max-width:1024px;margin:36px auto 0;padding:0 16px;font-family:'Roboto',sans-serif;color:var(--a-name-color);box-sizing:border-box}.about-title{margin:0 0 10px;font-size:1.45em;font-weight:500;letter-spacing:.01em;text-align:center}.about-lead{margin:0 0 6px;font-size:1em;line-height:1.6;color:var(--list-types-a-color);text-align:center}.about-subtitle{margin:30px 0 20px;font-size:1.12em;font-weight:500;text-align:center}.about-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:12px;margin:0;padding:0;list-style:none}.about-feature{display:flex;gap:12px;padding:14px;background:var(--card-bg);border:1px solid var(--card-border);border-radius:16px;box-sizing:border-box;transition:border-color .2s ease}.about-feature:hover{border-color:var(--card-hover-border)}.about-feature-icon{flex:0 0 auto;display:flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:var(--chat-btn-bg)}.about-feature-icon img{filter:var(--header-main-img-filter)}.about-feature-body{display:flex;flex-direction:column;gap:5px;min-width:0}.about-feature-title{font-size:.98em;font-weight:500;line-height:1.3}.about-feature-text{font-size:.9em;line-height:1.5;color:var(--list-types-a-color)}.about-examples{display:flex;flex-direction:column;gap:8px}.about-example{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding:10px 14px 10px 30px;background:var(--card-bg);border:1px solid var(--card-border);border-radius:14px;box-sizing:border-box}.about-ex-in,.about-ex-out{max-width:100%;overflow-x:auto;overflow-y:hidden;scrollbar-width:none}.about-ex-in::-webkit-scrollbar,.about-ex-out::-webkit-scrollbar{display:none}.about-ex-arrow{flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;font-size:.95em;line-height:1;font-weight:700;color:var(--about-arrow-color);background:var(--about-arrow-bg);border:1px solid var(--about-arrow-border);border-radius:50%;opacity:1;user-select:none}.about-ex-meta{margin-left:auto;display:flex;align-items:center;justify-content:end;gap:8px}.about-ex-tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;font-size:.78em;color:var(--chip-color);background:var(--chip-bg);border:1px solid transparent;border-radius:999px;text-decoration:none;white-space:nowrap;transition:border-color .15s ease,color .15s ease}.about-ex-tag img{filter:var(--header-main-img-filter);opacity:.6}a.about-ex-tag:hover{border-color:var(--card-hover-border);color:var(--chat-color-focus)}a.about-ex-tag:hover img{opacity:1}.about-ex-in:not(.tex-ready),.about-ex-out:not(.tex-ready){font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.88em;color:var(--list-types-a-color)}@media screen and (max-width:600px){.about-ai{margin-top:28px;padding:0 12px}.about-title{font-size:1.3em}.about-features{grid-template-columns:1fr}.about-example{padding:10px 12px}.about-ex-meta{margin-left:0;width:100%}}