:root{--tg-blue:#2481cc;--tg-blue-hover:#1c6fad;--tg-blue-light:#e8f2fc;--tg-bg:#f5f6f8;--tg-card-bg:#fff;--tg-text:#1f2937;--tg-text-muted:#6b7280;--tg-border:#e5e7eb;--tg-bubble-in:#fff;--tg-bubble-out:#effdde;--tg-radius:12px;--tg-radius-sm:8px;--tg-radius-pill:9999px;--tg-shadow-sm:0 1px 2px #0000000d;--tg-shadow:0 4px 12px #0000000f;--tg-shadow-lg:0 12px 32px #00000014}@media (prefers-color-scheme:dark){:root{--tg-blue:#2aabee;--tg-blue-hover:#229ed9;--tg-blue-light:#2aabee1f;--tg-bg:#0e1621;--tg-card-bg:#17212b;--tg-text:#f3f4f6;--tg-text-muted:#8e9ca8;--tg-border:#242f3d;--tg-bubble-in:#182533;--tg-bubble-out:#2b5278;--tg-shadow-sm:0 1px 2px #0003;--tg-shadow:0 4px 12px #00000040;--tg-shadow-lg:0 12px 32px #00000059}}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--tg-bg);color:var(--tg-text);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.6}a{color:var(--tg-blue);text-decoration:none;transition:color .15s}a:hover{text-decoration:underline}.container{max-width:980px;margin:0 auto;padding:0 24px}.tg-header{z-index:100;background-color:var(--tg-card-bg);border-bottom:1px solid var(--tg-border);position:sticky;top:0}.header-content{justify-content:space-between;align-items:center;height:64px;display:flex}.brand{color:var(--tg-text);align-items:center;gap:12px;font-size:1.25rem;font-weight:600;text-decoration:none;display:flex}.brand:hover{text-decoration:none}.brand-icon{object-fit:cover;border-radius:50%;width:36px;height:36px}.nav-group{align-items:center;gap:20px;display:flex}.nav-link{color:var(--tg-text-muted);font-size:.95rem;font-weight:500;text-decoration:none}.nav-link:hover{color:var(--tg-blue);text-decoration:none}.lang-switch{border:1px solid var(--tg-border);border-radius:var(--tg-radius-pill);padding:2px 4px;font-size:.85rem;display:inline-flex}.lang-switch a{border-radius:var(--tg-radius-pill);color:var(--tg-text-muted);padding:2px 8px;font-weight:500;text-decoration:none}.lang-switch a.active{background-color:var(--tg-blue-light);color:var(--tg-blue);font-weight:600}.btn-tg{background-color:var(--tg-blue);border-radius:var(--tg-radius-pill);justify-content:center;align-items:center;gap:8px;padding:8px 18px;font-size:.95rem;font-weight:500;transition:background-color .15s,transform .1s;display:inline-flex;box-shadow:0 2px 6px #2481cc40;color:#fff!important;text-decoration:none!important}.btn-tg:hover{background-color:var(--tg-blue-hover);transform:translateY(-1px)}.btn-tg-lg{padding:12px 28px;font-size:1.05rem;font-weight:600}.hero{text-align:center;padding:64px 0 48px}.hero-subhead{color:var(--tg-blue);letter-spacing:.05em;text-transform:uppercase;margin-bottom:12px;font-size:.95rem;font-weight:600}.hero-title{letter-spacing:-.02em;color:var(--tg-text);margin-bottom:18px;font-size:2.75rem;font-weight:700;line-height:1.2}.hero-desc{max-width:620px;color:var(--tg-text-muted);margin:0 auto 32px;font-size:1.15rem;line-height:1.6}.hero-cta{justify-content:center;gap:16px;margin-bottom:48px;display:flex}.chat-window{background-color:var(--tg-card-bg);border:1px solid var(--tg-border);border-radius:var(--tg-radius);max-width:540px;box-shadow:var(--tg-shadow-lg);text-align:left;margin:0 auto 64px;overflow:hidden}.chat-header{border-bottom:1px solid var(--tg-border);background-color:var(--tg-card-bg);align-items:center;gap:12px;padding:12px 18px;display:flex}.chat-header-avatar{border-radius:50%;width:40px;height:40px}.chat-header-info{flex:1}.chat-header-title{color:var(--tg-text);font-size:1rem;font-weight:600}.chat-header-status{color:var(--tg-blue);font-size:.82rem}.chat-body{background-color:var(--tg-bg);flex-direction:column;gap:14px;padding:20px;display:flex}.msg{max-width:82%;box-shadow:var(--tg-shadow-sm);border-radius:12px;padding:10px 14px;font-size:.95rem;line-height:1.45;position:relative}.msg-in{background-color:var(--tg-bubble-in);color:var(--tg-text);border-bottom-left-radius:4px;align-self:flex-start}.msg-out{background-color:var(--tg-bubble-out);color:var(--tg-text);border-bottom-right-radius:4px;align-self:flex-end}.msg-voice{align-items:center;gap:10px;display:flex}.voice-icon{background:var(--tg-blue);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:14px;display:flex}.msg-time{color:var(--tg-text-muted);text-align:right;width:100%;margin-top:4px;font-size:.75rem;display:inline-block}.transcription-box{background-color:var(--tg-card-bg);border-left:3px solid var(--tg-blue);border-radius:4px;margin-top:6px;padding:6px 10px;font-size:.88rem}.transcription-label{text-transform:uppercase;color:var(--tg-blue);margin-bottom:2px;font-size:.72rem;font-weight:600}.features-section{padding:48px 0}.section-heading{text-align:center;margin-bottom:40px}.section-title{color:var(--tg-text);margin-bottom:8px;font-size:2rem;font-weight:700}.section-desc{color:var(--tg-text-muted);font-size:1.05rem}.grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;display:grid}.card{background-color:var(--tg-card-bg);border:1px solid var(--tg-border);border-radius:var(--tg-radius);box-shadow:var(--tg-shadow-sm);padding:24px;transition:transform .15s,box-shadow .15s}.card:hover{box-shadow:var(--tg-shadow);transform:translateY(-2px)}.card-icon{margin-bottom:12px;font-size:1.75rem}.card-title{color:var(--tg-text);margin-bottom:8px;font-size:1.2rem;font-weight:600}.card-text{color:var(--tg-text-muted);font-size:.95rem;line-height:1.55}.legal-content{background-color:var(--tg-card-bg);border:1px solid var(--tg-border);border-radius:var(--tg-radius);max-width:800px;box-shadow:var(--tg-shadow-sm);margin:40px auto;padding:40px}.legal-content h1{margin-bottom:8px;font-size:2rem}.legal-content .updated{color:var(--tg-text-muted);border-bottom:1px solid var(--tg-border);margin-bottom:24px;padding-bottom:16px;font-size:.9rem}.legal-content h2{margin:28px 0 12px;font-size:1.3rem}.legal-content p,.legal-content ul{color:var(--tg-text);margin-bottom:16px;line-height:1.65}.legal-content ul{padding-left:20px}.tg-footer{border-top:1px solid var(--tg-border);background-color:var(--tg-card-bg);margin-top:64px;padding:32px 0}.footer-content{color:var(--tg-text-muted);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;font-size:.9rem;display:flex}.footer-links{gap:18px;display:flex}.footer-links a{color:var(--tg-text-muted);text-decoration:none}.footer-links a:hover{color:var(--tg-blue);text-decoration:underline}@media (width<=640px){.hero-title{font-size:2rem}.header-content{height:56px}.nav-link{display:none}}