:root{--bg:#f8fafc;--card:#fff;--muted:#64748b;--accent:#0284c7;--mono:"JetBrains Mono",monospace;--ui-radius:10px}html,body{height:100%}body{font-family:'Inter',sans-serif;background:var(--bg);color:#0f172a;margin:0;-webkit-font-smoothing:antialiased}.kb-container{max-width:1100px;margin:36px auto;padding:24px}.kb-header{display:flex;gap:18px;align-items:center;background:#fff;border-radius:12px;padding:18px 22px;box-shadow:0 4px 18px rgba(2,6,23,.06)}.kb-header .icon{width:64px;height:64px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,rgba(2,132,199,.1),rgba(2,132,199,.06));color:var(--accent);font-size:28px;border:1px solid rgba(2,132,199,.08)}.kb-header h1{margin:0;font-size:1.5rem;font-weight:700}.kb-header p{margin:0;color:var(--muted);margin-top:4px}.section-header{display:flex;gap:12px;align-items:center;margin-top:26px;margin-bottom:10px;padding-left:8px;border-left:4px solid var(--accent)}.section-header h3{margin:0;font-size:1.05rem;font-weight:600}.section-header small{color:var(--muted);display:block;margin-top:4px}.kb-card{background:var(--card);border-radius:var(--ui-radius);padding:18px;box-shadow:0 2px 10px rgba(2,6,23,.04);margin-bottom:18px}.kb-row{display:flex;gap:18px;align-items:stretch;flex-wrap:wrap}.kb-left{flex:1 1 420px;min-width:260px}.kb-right{flex:0 1 380px;min-width:260px;display:flex;align-items:center;justify-content:center}.muted{color:var(--muted)}.mono{font-family:var(--mono);font-size:.95rem;color:var(--accent)}.feature-list{list-style:none;padding:0;margin:12px 0 0 0}.feature-list li{margin:8px 0;color:#0f172a;font-size:.95rem}.feature-list li .ok{color:#16a34a;margin-right:8px}.example-box{width:100%;border-radius:8px;background:#fbfdff;border:1px solid #eef2f7;padding:12px}.before-after{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:center}.ba-item{width:45%;min-width:160px;background:#fff;border-radius:8px;padding:12px;border:1px solid #e6eef6;box-shadow:0 2px 8px rgba(2,6,23,.03);text-align:center}.ba-item .label{font-weight:600;color:var(--muted);font-size:.78rem;margin-bottom:6px;display:block}.ba-text{font-size:1.05rem;line-height:1.3;margin:6px 0;color:#0f172a}.arrow{font-size:26px;color:var(--accent)}.ocr-canvas{position:relative;width:320px;height:180px;background:#fff;border-radius:6px;border:1px solid #e6eef6;overflow:hidden;display:flex;align-items:center;justify-content:center}.ocr-canvas img{max-width:100%;max-height:100%;display:block}.bbox{position:absolute;border:2px dashed rgba(2,132,199,.7);pointer-events:none;box-shadow:0 2px 6px rgba(2,132,199,.08)}.bbox-label{position:absolute;background:var(--accent);color:#fff;padding:2px 6px;font-size:11px;border-radius:4px;font-family:var(--mono);transform:translateY(-120%)}pre.sample{background:#0f172a;color:#e6f2ff;padding:12px;border-radius:8px;overflow:auto;font-family:var(--mono);font-size:.92rem}.erase-pair{display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap}.pdf-demo{width:100%;height:160px;border-radius:8px;background:linear-gradient(90deg,#fff,#fbfdff);border:1px solid #eef2f7;display:flex;align-items:center;justify-content:center}.small-muted{color:var(--muted);font-size:.92rem}.badge-lang{display:inline-block;background:#eef6ff;border-radius:6px;padding:4px 8px;margin-right:6px;color:var(--accent);font-weight:600;font-family:var(--mono);font-size:.85rem}@media(max-width:900px){.kb-row{flex-direction:column}.ba-item{width:100%}.kb-right{order:2}}.features-hero{background:linear-gradient(180deg,#f8fbff 0%,#fff 100%);position:relative;overflow:hidden}.features-hero .hero-bg{position:absolute;top:-100px;left:50%;width:900px;height:900px;background:radial-gradient(circle at center,rgba(59,130,246,.15),transparent 70%);transform:translateX(-50%);z-index:0}.features-hero .container{position:relative;z-index:2}.text-gradient{background:linear-gradient(90deg,#2563eb,#7c3aed);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.lang-support-badge{background:#fff;border:1px solid #e0e7ff;padding:.6rem 1rem;border-radius:50px;font-weight:500;color:#1e293b;transition:.3s ease}.lang-support-badge:hover{transform:translateY(-2px);box-shadow:0 3px 8px rgba(0,0,0,.08)}.btn.btn-primary{background:linear-gradient(90deg,#2563eb,#7c3aed);border:0}.btn.btn-primary:hover{background:linear-gradient(90deg,#1d4ed8,#6d28d9)}.btn-outline-primary{border:2px solid #2563eb;color:#2563eb}.btn-outline-primary:hover{background:#2563eb;color:#fff}