:root{--theme-accent:#0050a0;color-scheme:light;-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html,body{color:#0f172a;background:#0f172a;min-height:100vh;margin:0;padding:0}body{flex-direction:column;display:flex}.fixed-optical-backdrop{z-index:0;pointer-events:none;position:fixed;inset:0;overflow:hidden}.wallpaper-plane{background-image:url(/assets/wallpapers/morandi-16-9-desktop-a.svg);background-position:50%;background-size:cover;position:absolute;inset:-15px;transform:scale(1.02)}.subtle-grid-overlay{background-image:linear-gradient(#ffffff14 1px,#0000 1px),linear-gradient(90deg,#ffffff14 1px,#0000 1px);background-size:50px 50px;position:absolute;inset:0}.optical-light-band{filter:blur(50px);opacity:.55;background:linear-gradient(90deg,#024,#0050a0 24%,#0284c7 48%,#38bdf8 72%,#f472b6 88%,#c084fc);border-radius:999px;width:120%;height:80px;position:absolute;top:15%;left:-10%;transform:rotate(-8deg)}.tool-page-container{z-index:1;width:100%;max-width:820px;margin:0 auto;padding:20px 24px 60px;position:relative}.back-row{margin-bottom:16px}.back-link{color:#fffc;-webkit-backdrop-filter:blur(8px);background:#ffffff26;border:1px solid #ffffff40;border-radius:99px;align-items:center;gap:6px;padding:6px 14px;font-size:12px;font-weight:600;text-decoration:none;transition:all .18s;display:inline-flex}.back-link:hover{background:#ffffff47;transform:translate(-2px)}.tool-hero{text-align:center;margin-bottom:24px}.tool-hero-icon{background:#ffffff8c;border:1px solid #fffc;border-radius:18px;justify-content:center;align-items:center;width:64px;height:64px;margin-bottom:14px;font-size:32px;display:inline-flex;box-shadow:0 4px 12px #0050a01f,inset 0 1px 2px #fff}.tool-hero h1{letter-spacing:-.8px;color:#fff;text-shadow:0 2px 8px #0000004d;margin:0 0 8px;font-size:clamp(22px,3vw,28px);font-weight:800}.tool-hero p{color:#ffffffbf;max-width:480px;margin:0 auto;font-size:13px;line-height:1.6}.tool-main-card{--lg-radius:24px;--lg-tint:#ffffff24}.tool-main-card .lg-content{padding:28px}.tool-label{letter-spacing:.08em;color:#0050a0;margin-bottom:6px;font-family:ui-monospace,SFMono-Regular,monospace;font-size:10px;font-weight:700;display:block}.tool-input{-webkit-backdrop-filter:blur(8px);color:#0f172a;background:#ffffffa6;border:1px solid #fff9;border-radius:12px;outline:none;width:100%;padding:11px 14px;font-size:14px;transition:all .18s;box-shadow:0 2px 6px #0050a00f}.tool-input:focus{background:#ffffffe6;border-color:#0050a0;box-shadow:0 0 0 3px #0050a033}.tool-input::placeholder{color:#94a3b8}select.tool-input{cursor:pointer;-webkit-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%230050a0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");background-position:right 12px center;background-repeat:no-repeat;padding-right:32px}textarea.tool-input{resize:vertical;font-family:ui-monospace,SFMono-Regular,monospace;font-size:12px;line-height:1.5}.tool-btn{cursor:pointer;border:none;border-radius:12px;justify-content:center;align-items:center;gap:8px;padding:11px 22px;font-size:13px;font-weight:650;transition:all .18s;display:inline-flex}.tool-btn-primary{color:#fff;background:#0050a0;box-shadow:0 4px 12px #0050a04d}.tool-btn-primary:hover{background:#003d7a;transform:translateY(-1px);box-shadow:0 6px 16px #0050a066}.tool-btn-primary:active{transform:translateY(.5px)}.tool-btn-secondary{color:#0050a0;background:#ffffff8c;border:1px solid #0050a033}.tool-btn-secondary:hover{background:#fffc}.result-display{text-align:center;background:#0050a00f;border:1px solid #0050a026;border-radius:16px;padding:20px}.result-label{letter-spacing:.08em;color:#0050a0;margin-bottom:6px;font-family:ui-monospace,SFMono-Regular,monospace;font-size:10px;font-weight:700}.result-value{color:#0050a0;font-variant-numeric:tabular-nums;font-size:clamp(28px,5vw,44px);font-weight:800;line-height:1.1}.result-sub{color:#64748b;margin-top:4px;font-size:12px}.tool-grid-2{grid-template-columns:1fr 1fr;gap:14px;display:grid}.tool-grid-3{grid-template-columns:repeat(3,1fr);gap:14px;display:grid}.ad-placeholder{text-align:center;color:#ffffff80;letter-spacing:.08em;background:#ffffff14;border:1px dashed #fff3;border-radius:12px;width:100%;max-width:970px;margin:20px auto;padding:14px;font-family:monospace;font-size:11px}.tool-footer{text-align:center;color:#ffffff80;border-top:1px solid #ffffff1a;margin-top:40px;padding:24px;font-size:11px}.tool-footer strong{color:#ffffffb3}#global-toast{color:#fff;z-index:999;background:#0050a0;border-radius:99px;padding:10px 22px;font-size:12px;font-weight:600;display:none;position:fixed;bottom:24px;left:50%;transform:translate(-50%);box-shadow:0 8px 24px #0050a059}.tool-faq{margin-top:32px}.tool-faq-title{color:#fff;letter-spacing:-.3px;text-shadow:0 2px 8px #0000004d;margin:0 0 14px;font-size:18px;font-weight:700}.tool-faq-list{margin:0}.tool-faq-item{-webkit-backdrop-filter:blur(10px);background:#ffffff24;border:1px solid #ffffff40;border-radius:14px;margin-bottom:10px;padding:14px 18px}.tool-faq-item dt{color:#fff;margin-bottom:6px;font-size:13.5px;font-weight:700;line-height:1.45}.tool-faq-item dd{color:#ffffffd1;margin:0;font-size:12.5px;line-height:1.7}@media (width<=640px){.tool-page-container{padding:12px 14px 40px}.tool-main-card .lg-content{padding:20px}.tool-grid-2,.tool-grid-3{grid-template-columns:1fr}}