:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}#root{max-width:1280px;margin:0 auto;padding:0 1rem}.navbar{position:fixed;top:0;left:0;width:100%;height:64px;background:#fff;box-shadow:0 2px 8px #0000000d;display:flex;align-items:center;justify-content:space-between;z-index:100;padding:0 1rem;box-sizing:border-box}.logo{height:2.5em;padding:0;font-size:1.5rem;font-weight:700;color:#f60;display:flex;align-items:center}.navbar nav{display:flex;align-items:center;gap:1.5rem}.lang-btn{margin-left:1rem;padding:.3em 1em;border:none;background:#f5f5f5;border-radius:6px;cursor:pointer}.page{background:#f6f8fa;min-height:80vh;padding:2rem 0}.footer{text-align:center;color:#888;margin:2rem 0 1rem}.logo:hover{filter:drop-shadow(0 0 2em #646cffaa)}.logo.react:hover{filter:drop-shadow(0 0 2em #61dafbaa)}@keyframes logo-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (prefers-reduced-motion: no-preference){a:nth-of-type(2) .logo{animation:logo-spin infinite 20s linear}}.card{background:#fff;border-radius:16px;box-shadow:0 8px 32px #ff66001a;max-width:700px;margin:2rem auto;padding:2.5rem 2rem;text-align:left;position:relative}.brand-row{display:flex;align-items:center;margin-bottom:1.2rem}.brand-logo{width:48px;height:48px;margin-right:1rem;border-radius:12px;box-shadow:0 2px 8px #ff66001a;background:#fff}.brand-title{font-size:1.7rem;font-weight:800;color:#f60;letter-spacing:2px}.divider{border:none;border-top:1.5px solid #f0f0f0;margin:1.5rem 0}.page h1{font-size:2.2rem;font-weight:700;color:#223354;margin-bottom:1.2rem}.page h2{font-size:1.3rem;color:#4a5a6a;margin-bottom:1rem}.page p,.page ul,.page ol{color:#333;font-size:1.08rem;line-height:1.8}.feature-list{list-style:none;padding:0;margin:0 0 2rem}.feature-list li{margin-bottom:.7rem;font-size:1.08rem;display:flex;align-items:center}.icon-ai,.icon-link,.icon-manage,.icon-device{display:inline-block;width:1.2em;height:1.2em;margin-right:.5em;background-size:contain;background-repeat:no-repeat}.icon-ai{background-image:url(/static/soutuLogo.png);filter:grayscale(1) brightness(1.2)}.icon-link{background-image:url(/static/soutuLogo.png);filter:grayscale(1) brightness(1.2) hue-rotate(60deg)}.icon-manage{background-image:url(/static/soutuLogo.png);filter:grayscale(1) brightness(1.2) hue-rotate(120deg)}.icon-device{background-image:url(/static/soutuLogo.png);filter:grayscale(1) brightness(1.2) hue-rotate(180deg)}.action-row{margin-top:1.5rem;display:flex;gap:1rem}.btn,.btn-primary{display:inline-block;background:#f60;color:#fff;border-radius:8px;padding:.6em 1.8em;font-size:1.08rem;font-weight:600;margin-top:1.2rem;text-decoration:none;box-shadow:0 2px 8px #ff66001a;transition:background .2s,box-shadow .2s;border:none;cursor:pointer;letter-spacing:1px}.btn:hover,.btn-primary:hover{background:#e65c00;box-shadow:0 4px 16px #ff66002e}.btn-outline{background:#fff;color:#f60;border:2px solid #FF6600}.btn-outline:hover{background:#fff3e6;color:#e65c00;border-color:#e65c00}.slogan{margin-top:2rem;color:#f60;font-size:1.1rem;text-align:center;letter-spacing:1px;font-weight:500}