:root{--bg: #f5f7fa;--card: #ffffff;--ink: #1f2733;--muted: #6b7685;--brand: #2f6bff;--brand-d: #1f54d6;--line: #e6eaf0;--radius: 16px;--shadow: 0 10px 30px rgba(31, 39, 51, .08)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink);min-height:100vh;display:flex;flex-direction:column}.site-header{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;background:var(--card);border-bottom:1px solid var(--line)}.logo{font-weight:700;font-size:18px;text-decoration:none;color:var(--ink)}.tag{color:var(--muted);font-size:13px}.topnav{display:flex;gap:6px;flex:1;margin:0 20px}.topnav a{text-decoration:none;color:var(--muted);font-size:14px;padding:6px 10px;border-radius:8px}.topnav a:hover{background:#f0f2f6;color:var(--ink)}.topnav a.active{background:#eef3ff;color:var(--brand-d)}.home-hero{text-align:center;margin-bottom:28px}.home-hero 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a:hover{color:var(--brand)}.tool-page>h1{font-size:28px;margin:0 0 8px}.tool-page .lead{color:var(--muted);font-size:15px;line-height:1.7;margin:0 0 22px;max-width:760px}.tool-root{margin-bottom:8px}.article{margin-top:36px;max-width:820px}.article h2{font-size:19px;margin:28px 0 12px}.steps{padding-left:20px;line-height:1.9;color:#3a4452}.steps li{margin-bottom:4px}.faq-item{border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin-bottom:10px;background:var(--card)}.faq-item summary{cursor:pointer;font-weight:600;font-size:15px}.faq-item summary::-webkit-details-marker{color:var(--brand)}.faq-item p{color:var(--muted);line-height:1.7;margin:10px 0 0}.related{margin-top:36px}.related h2{font-size:19px;margin-bottom:14px}.copyright{margin-top:4px;opacity:.7}.ad-slot{margin:32px auto 0;max-width:728px;height:90px;border:1px dashed #c5cddb;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#aab2bf;font-size:13px;background:#fafbfc}.tool 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20px}.site-footer{text-align:center;color:var(--muted);font-size:12px;padding:24px}.hero{text-align:center}.hero h1{font-size:34px;margin:8px 0;letter-spacing:-.5px}.hero .sub{color:var(--muted);font-size:16px;margin-bottom:28px}.drop{display:block;max-width:560px;margin:0 auto;background:var(--card);border:2px dashed #c5cddb;border-radius:var(--radius);padding:48px 24px;cursor:pointer;transition:.18s}.drop:hover,.drop.over{border-color:var(--brand);background:#f3f7ff}.drop-icon{font-size:40px}.drop-title{font-size:18px;font-weight:600;margin-top:12px}.drop-hint{color:var(--muted);font-size:13px;margin-top:6px}.feats{list-style:none;padding:0;margin:28px auto 0;display:flex;gap:18px;justify-content:center;flex-wrap:wrap;color:var(--muted);font-size:14px}.quality-guide{max-width:560px;margin:16px auto 0;padding:12px 14px;border:1px solid #ffd6a0;border-radius:12px;background:#fff8ef;color:#815200;font-size:13px;line-height:1.7;text-align:left}.processing{text-align:center;padding:60px 20px}.spinner{width:44px;height:44px;margin:0 auto 20px;border:4px solid var(--line);border-top-color:var(--brand);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.proc-hint{color:var(--muted)}.bar{max-width:320px;height:8px;background:var(--line);border-radius:99px;margin:18px auto 0;overflow:hidden}.bar-fill{height:100%;width:0;background:var(--brand);transition:width .2s}.editor{display:grid;grid-template-columns:1fr 360px;gap:28px;align-items:start}.preview-wrap{background:transparent;border-radius:0;box-shadow:none;padding:0;display:flex;justify-content:center;align-items:flex-start;min-height:0}#canvas{display:block;max-width:100%;max-height:460px;border-radius:6px;outline:1px solid rgba(31,39,51,.12);box-shadow:0 14px 34px #1f273324}.controls{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.ctrl-group{margin-bottom:22px}.ctrl-group h3{font-size:14px;color:var(--muted);margin:0 0 10px;font-weight:600}.chips{display:flex;flex-wrap:wrap;gap:8px}.chip{border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 12px;font-size:14px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:2px;transition:.15s;color:var(--ink)}.chip small{color:var(--muted);font-size:11px}.chip:hover{border-color:var(--brand)}.chip.active{border-color:var(--brand);background:#eef3ff;color:var(--brand-d)}.chip.color{flex-direction:row}.swatch{width:16px;height:16px;border-radius:4px;border:1px solid rgba(0,0,0,.1)}.slider{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);margin-bottom:10px}.slider input{flex:1}.actions{display:flex;flex-direction:column;gap:10px;margin-top:6px}.btn{border:none;border-radius:12px;padding:13px 16px;font-size:15px;font-weight:600;cursor:pointer;transition:.15s}.btn.primary{background:var(--brand);color:#fff}.btn.primary:hover{background:var(--brand-d)}.btn.ghost{background:#f0f2f6;color:var(--ink)}.btn.ghost:hover{background:#e6eaf0}.dpi-note{color:var(--muted);font-size:12px;text-align:center;margin:14px 0 0}.group-label{font-size:12px;color:var(--muted);margin:12px 0 6px;font-weight:600}.group-label:first-child{margin-top:0}.btn.tiny{padding:7px 10px;font-size:12px;font-weight:500;margin-top:8px}.unlock-state{font-size:12px;color:var(--muted);text-align:center;margin:10px 0 0}.face-tip{font-size:12px;color:var(--muted);margin:0 0 8px;line-height:1.6}.face-tip.warn{color:#b06a00}#face-group:empty{display:none}.quality-alert{border:1px solid #ffd6a0;background:#fff8ef;color:#815200;border-radius:10px;padding:10px 12px;font-size:12px;line-height:1.6;margin-top:8px}.quality-alert ul{margin:6px 0 0;padding-left:18px}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#141a2380;display:flex;align-items:center;justify-content:center;padding:20px;z-index:50}.modal{background:#fff;border-radius:18px;padding:26px;width:100%;max-width:380px;box-shadow:0 20px 60px #00000040;animation:pop .16s ease}@keyframes pop{0%{transform:scale(.96);opacity:0}}.modal h3{margin:0 0 6px;font-size:19px}.modal-sub{color:var(--muted);font-size:13px;line-height:1.6;margin:0 0 16px}.price{font-size:24px;font-weight:800;color:var(--brand-d);text-align:center;margin-bottom:14px}.btn.block{display:block;width:100%;text-align:center;text-decoration:none;margin-bottom:10px}.divider{text-align:center;color:var(--muted);font-size:12px;margin:14px 0;position:relative}.divider:before,.divider:after{content:"";position:absolute;top:50%;width:26%;height:1px;background:var(--line)}.divider:before{left:0}.divider:after{right:0}.code-row{display:flex;gap:8px;margin-bottom:8px}.code-row input,.kb-input input{flex:1;border:1px solid var(--line);border-radius:10px;padding:11px 12px;font-size:14px;width:100%}.kb-input{display:flex;align-items:center;gap:8px;font-size:14px;margin:10px 0 16px}.kb-input input{max-width:90px}.size-presets{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:6px}.size-presets button{border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px 12px;cursor:pointer;font-size:13px}.size-presets button:hover{border-color:var(--brand);color:var(--brand-d)}.modal-actions{display:flex;gap:8px}.modal-actions .btn{flex:1}.modal-result{font-size:13px;margin:12px 0 0;text-align:center;min-height:18px}.modal-result.ok{color:#18794e}.modal-result.err{color:#d9352c}@media (max-width: 820px){.editor{grid-template-columns:1fr}.hero h1{font-size:26px}}