:root{--bg:#f4f0eb;--bg2:#ede8e0;--card:#fff;--border:#3d3a321a;--text:#3d3a32;--muted:#8c8578;--accent:#d65d5d;--accent2:#2c6e5d;--radius:12px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:Inter,-apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Noto Sans SC,sans-serif;line-height:1.7}.container{max-width:1080px;margin:0 auto;padding:0 24px}.site-header{z-index:50;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);background:#f4f0ebd9;position:-webkit-sticky;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;height:56px;display:flex}.logo{color:var(--text);align-items:center;gap:10px;font-size:1rem;font-weight:600;text-decoration:none;display:flex}.logo-icon{width:26px;height:26px}.nav{gap:24px;display:flex}.nav a{color:var(--muted);font-size:.9rem;text-decoration:none;transition:color .2s}.nav a:hover{color:var(--text)}.hero{text-align:center;border-bottom:1px solid var(--border);padding:80px 0 60px}.hero-badges{flex-wrap:wrap;justify-content:center;gap:8px;margin-bottom:28px;display:flex}.badge{border:1px solid var(--border);background:var(--card);color:var(--muted);border-radius:999px;padding:4px 14px;font-size:.78rem}.badge-accent{color:var(--accent);background:#d65d5d0f;border-color:#d65d5d4d}.hero h1{letter-spacing:-.02em;color:var(--text);font-family:DM Serif Display,Noto Serif SC,Source Han Serif SC,serif;font-size:max(2.4rem,min(5.5vw,3.8rem));font-weight:400;line-height:1.15}.hero h1 .dot{color:var(--accent)}.hero-sub{color:var(--muted);max-width:600px;margin:20px auto 32px;font-size:1rem;line-height:1.7}.btn{cursor:pointer;-webkit-user-select:none;-moz-user-select:none;user-select:none;border:1px solid #0000;border-radius:8px;justify-content:center;align-items:center;padding:10px 24px;font-size:.95rem;font-weight:500;text-decoration:none;transition:transform .12s,box-shadow .2s,background .2s,border-color .2s;display:inline-flex}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{box-shadow:0 0 0 2px #d65d5d4d}.btn-outline{color:var(--accent);background:0 0;border-color:#d65d5d80}.btn-outline:hover{background:#d65d5d0d}.btn-ghost{border-color:var(--border);color:var(--text);background:0 0}.btn-ghost:hover{background:#3d3a320d}.tool-section{margin-top:-12px;padding:0 0 40px}.tool-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:28px}.dropzone{text-align:center;cursor:pointer;border:1.5px dashed #3d3a3233;border-radius:12px;outline:none;padding:60px 20px;transition:border-color .25s,background .25s}.dropzone:hover,.dropzone.dragover{border-color:var(--accent);background:#d65d5d0a}.dropzone:focus-visible{border-color:var(--accent);background:#d65d5d0a}.dz-icon{width:44px;height:44px;color:var(--accent);opacity:.6;margin-bottom:14px}.dz-title{font-size:1.05rem;font-weight:500}.dz-sub{color:var(--muted);margin-top:6px;font-size:.88rem}.controls{border-bottom:1px solid var(--border);flex-wrap:wrap;align-items:center;gap:20px;margin-bottom:16px;padding-bottom:14px;display:flex}.control-group{align-items:center;gap:10px;display:flex}.control-label{color:var(--muted);white-space:nowrap;font-size:.88rem}.control-label b{color:var(--text);font-weight:500}.segmented{border:1px solid var(--border);background:#3d3a320a;border-radius:8px;padding:2px;display:inline-flex}.segmented label{cursor:pointer}.segmented input{opacity:0;pointer-events:none;position:absolute}.segmented span{color:var(--muted);white-space:nowrap;border-radius:6px;padding:5px 12px;font-size:.85rem;transition:background .15s,color .15s;display:block}.segmented input:checked+span{background:var(--accent);color:#fff}input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;cursor:pointer;background:#3d3a322e;border-radius:3px;outline:none;width:120px;height:3px}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;background:var(--accent);border:2px solid var(--card);cursor:pointer;border-radius:50%;width:14px;height:14px}input[type=range]::-moz-range-thumb{background:var(--accent);border:2px solid var(--card);cursor:pointer;border-radius:50%;width:14px;height:14px}.canvas-wrap{border:1px solid var(--border);background:repeating-conic-gradient(#e8e0d6 0%,#e8e0d6 25%,#e0d8cc 0%,#e0d8cc 50%) 0 0/20px 20px;border-radius:10px;justify-content:center;align-items:center;min-height:200px;padding:8px;display:flex;position:relative;overflow:hidden}.canvas-inner{line-height:0;display:inline-block;position:relative}#baseCanvas{max-width:100%;max-height:62vh;display:block}#maskCanvas{opacity:.45;cursor:crosshair;touch-action:none;width:100%;height:100%;line-height:0;position:absolute;top:0;bottom:0;left:0;right:0}.canvas-hint{color:#3d3a32bf;pointer-events:none;white-space:nowrap;background:#f4f0ebd9;border-radius:999px;padding:3px 12px;font-size:.78rem;position:absolute;bottom:8px;left:50%;translate:-50%}.actions{flex-wrap:wrap;gap:10px;margin-top:16px;display:flex}.status{color:var(--muted);min-height:1.4em;margin-top:10px;font-size:.88rem}.status.ok{color:#3a9d7a}.status.err{color:var(--accent)}.section{padding:88px 0}.section+.section{border-top:1px solid var(--border)}.section-title{text-align:center;font-family:DM Serif Display,Noto Serif SC,Source Han Serif SC,serif;font-size:max(1.6rem,min(3vw,2.2rem));font-weight:400;line-height:1.25}.section-desc{color:var(--muted);text-align:center;max-width:640px;margin:10px auto 48px;font-size:.95rem}.grid{gap:20px;display:grid}.grid-3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;transition:transform .2s,border-color .2s}.card:hover{border-color:#2c6e5d4d}.card h3{margin-bottom:8px;font-size:1rem;font-weight:600}.card p{color:var(--muted);font-size:.9rem;line-height:1.6}.card-icon{width:36px;height:36px;color:var(--accent2);margin-bottom:14px}.card-icon svg{width:100%;height:100%}.feature-stat-row{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:44px;display:flex}.feature-stat{border:1px solid var(--border);color:var(--muted);background:#3d3a320a;border-radius:999px;align-items:center;gap:6px;padding:8px 16px;font-size:.85rem;display:flex}.feature-stat strong{color:var(--accent2);font-weight:600}.faq-list{max-width:720px;margin:0 auto}.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:10px;padding:20px 24px}.faq-item summary{cursor:pointer;padding-right:28px;font-size:.95rem;font-weight:500;list-style:none;position:relative}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";color:var(--muted);font-size:1.3rem;transition:transform .2s;position:absolute;top:-2px;right:2px}.faq-item[open] summary:after{transform:rotate(45deg)}.faq-item p{color:var(--muted);margin-top:10px;font-size:.9rem;line-height:1.65}.cta{text-align:center;background:var(--bg2);border-top:1px solid var(--border);padding:80px 20px}.cta h2{margin-bottom:10px;font-family:DM Serif Display,Noto Serif SC,Source Han Serif SC,serif;font-size:max(1.5rem,min(3vw,2rem));font-weight:400}.cta p{color:var(--muted);margin-bottom:24px}.site-footer{border-top:1px solid var(--border);padding:40px 0 0}.footer-inner{grid-template-columns:2fr 1fr 1fr;gap:32px;padding-bottom:28px;display:grid}.footer-brand span{font-size:1rem;font-weight:600}.footer-brand p{color:var(--muted);max-width:340px;margin-top:8px;font-size:.88rem}.footer-col h4{margin-bottom:10px;font-size:.9rem;font-weight:600}.footer-col a{color:var(--muted);padding:3px 0;font-size:.88rem;text-decoration:none;display:block}.footer-col a:hover{color:var(--text)}.footer-bottom{border-top:1px solid var(--border);padding:16px 20px}.footer-bottom p{color:var(--muted);text-align:center;font-size:.8rem}@media (max-width:720px){.footer-inner{grid-template-columns:1fr;gap:24px}.nav a:not(:last-child){display:none}.controls{gap:12px}input[type=range]{width:90px}.control-group{flex-wrap:wrap}.canvas-hint{white-space:normal;text-align:center;width:88%}.tool-card{padding:20px}.hero{padding:48px 0 40px}.section{padding:60px 0}.cta{padding:60px 20px}}