*{margin:0;padding:0;box-sizing:border-box}:root{--bg:#f8fafc;--fg:#0f172a;--muted:#64748b;--accent:#2563eb;--accent2:#7c3aed;--card:#fff;--border:#e2e8f0;--grad:linear-gradient(135deg,#2563eb,#7c3aed);--radius:14px;--shadow:0 1px 3px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04);--shadow-lg:0 10px 40px rgba(0,0,0,.08)}@media(prefers-color-scheme:dark){:root{--bg:#0b1120;--fg:#e2e8f0;--muted:#94a3b8;--accent:#60a5fa;--accent2:#a78bfa;--card:#131b2e;--border:#1e293b;--shadow:0 1px 3px rgba(0,0,0,.2);--shadow-lg:0 10px 40px rgba(0,0,0,.3)}}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans SC,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--fg);line-height:1.7;overflow-x:hidden;transition:background .3s,color .3s}.skip-link{position:absolute;top:-100%;left:50%;transform:translateX(-50%);background:var(--accent);color:#fff;padding:.5rem 1.5rem;border-radius:0 0 8px 8px;z-index:1000;text-decoration:none;font-size:.9rem}.skip-link:focus{top:0}:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}nav{position:fixed;top:0;inset-inline:0;z-index:50;background:color-mix(in srgb,var(--bg) 80%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);padding:.75rem 1.5rem;display:flex;align-items:center;justify-content:space-between}nav .logo{font-weight:700;font-size:1.15rem;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-decoration:none;color:var(--accent)}nav .nav-links{display:flex;gap:1.5rem;align-items:center}nav .nav-links a{color:var(--muted);text-decoration:none;font-size:.9rem;transition:color .15s}nav .nav-links a:hover{color:var(--fg)}.hero{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:6rem 2rem 4rem;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 30% 20%,rgba(255,255,255,.1) 0,transparent 60%)}.hero .badge{display:inline-flex;align-items:center;gap:.4rem;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.15);color:#fff;padding:.35rem 1rem;border-radius:999px;font-size:.85rem;margin-bottom:1.5rem;position:relative;z-index:1;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.hero .badge:before{content:"";width:6px;height:6px;border-radius:50%;background:#4ade80;animation:pulse 2s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}.hero h1{font-size:clamp(2.5rem,7vw,5.5rem);font-weight:800;letter-spacing:-.04em;color:#fff;position:relative;z-index:1;line-height:1.1}.hero h1 span{background:#fff;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero p{font-size:clamp(1rem,2.2vw,1.25rem);max-width:520px;margin:1.2rem auto 0;opacity:.85;color:rgba(255,255,255,.9)}.hero .cta-row,.hero p{position:relative;z-index:1}.hero .cta-row{display:flex;gap:1rem;flex-wrap:wrap;justify-content:center;margin-top:2.4rem}.hero .cta{display:inline-block;padding:.85rem 2.4rem;border-radius:999px;background:#fff;color:#2563eb;font-weight:600;font-size:1.05rem;text-decoration:none;transition:transform .15s,box-shadow .15s;border:none;cursor:pointer}.hero .cta:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(0,0,0,.18)}.hero .cta-secondary{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.3)}.hero .cta-secondary:hover{background:rgba(255,255,255,.08)}.stats{display:flex;gap:3rem;justify-content:center;flex-wrap:wrap;padding:3rem 1.5rem;border-bottom:1px solid var(--border)}.stat{text-align:center}.stat .num{font-size:clamp(1.8rem,4vw,2.5rem);font-weight:800;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.stat .label{font-size:.85rem;color:var(--muted);margin-top:.2rem}section{max-width:1000px;margin:0 auto;padding:5rem 1.5rem}.section-head{text-align:center;margin-bottom:3rem}.section-head h2{font-size:clamp(1.5rem,4vw,2.2rem);font-weight:700;margin-bottom:.5rem}.section-head>p{color:var(--muted);font-size:1.05rem;max-width:560px;margin:0 auto}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-gap:1.25rem;gap:1.25rem}.feat{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.8rem;transition:transform .2s,box-shadow .2s;box-shadow:var(--shadow)}.feat:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.feat .icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:1rem;background:var(--grad);color:#fff}.feat h3{font-size:1.15rem;margin-bottom:.4rem}.feat p{color:var(--muted);font-size:.95rem}.steps{display:flex;gap:1.5rem;flex-wrap:wrap;justify-content:center;counter-reset:step}.step{flex:1 1 220px;max-width:280px;text-align:center;counter-increment:step;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem 1.5rem;transition:transform .2s,box-shadow .2s}.step:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}.step:before{content:counter(step);display:block;width:56px;height:56px;margin:0 auto 1rem;border-radius:50%;background:var(--grad);color:#fff;font-weight:700;line-height:56px;font-size:1.3rem}.step h3{font-size:1.05rem;margin-bottom:.4rem}.step p{color:var(--muted);font-size:.9rem}.code-section{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;margin-top:2rem;overflow-x:auto;box-shadow:var(--shadow);position:relative}.code-section pre{font-family:SF Mono,SFMono-Regular,Menlo,Consolas,monospace;font-size:.86rem;line-height:1.7;color:var(--fg);white-space:pre-wrap;word-break:break-all}.code-section .kw{color:#c678dd}.code-section .str{color:#98c379}.code-section .cmt{color:var(--muted);font-style:italic}.copy-btn{position:absolute;top:1rem;right:1rem;background:var(--card);border:1px solid var(--border);border-radius:8px;padding:.3rem .7rem;font-size:.8rem;cursor:pointer;color:var(--muted);transition:color .15s,border-color .15s;font-family:inherit}.copy-btn:hover{color:var(--fg);border-color:var(--fg)}.copy-btn:focus-visible{outline:2px solid var(--accent)}.demo{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:2.5rem;margin:2rem 0;box-shadow:var(--shadow)}.demo h3{font-size:1.2rem;margin-bottom:.5rem}.demo h3,.demo>p{text-align:center}.demo>p{color:var(--muted);margin-bottom:1.5rem;font-size:.9rem}.demo-form{display:flex;gap:.75rem;flex-wrap:wrap;max-width:600px;margin:0 auto}.demo-form input[type=url]{flex:1 1 300px;padding:.75rem 1rem;border:1.5px solid var(--border);border-radius:10px;font-size:.95rem;background:var(--bg);color:var(--fg);transition:border-color .15s;font-family:inherit}.demo-form input[type=url]:focus{border-color:var(--accent);outline:none}.demo-form button{padding:.75rem 1.5rem;background:var(--grad);color:#fff;border:none;border-radius:10px;font-weight:600;cursor:pointer;font-size:.95rem;transition:opacity .15s,transform .15s;font-family:inherit}.demo-form button:hover{opacity:.9;transform:translateY(-1px)}.demo-form button:disabled{opacity:.5;cursor:not-allowed;transform:none}.demo-result{margin-top:1.5rem;text-align:center;min-height:2rem}.demo-result .short{font-size:1.2rem;font-weight:700;color:var(--accent);word-break:break-all}.demo-result .error{color:#ef4444;font-size:.9rem}.demo-result .loading{color:var(--muted)}.faq{max-width:720px;margin:0 auto}.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:.75rem;background:var(--card);overflow:hidden;transition:border-color .15s}.faq-item:hover{border-color:var(--accent)}.faq-q{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.25rem;cursor:pointer;font-weight:600;font-size:.95rem;-webkit-user-select:none;-moz-user-select:none;user-select:none;gap:1rem;width:100%;background:none;border:none;font-family:inherit;color:inherit;text-align:left}.faq-q:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.faq-q .chevron{flex-shrink:0;transition:transform .2s;color:var(--muted)}.faq-item.open .faq-q .chevron{transform:rotate(180deg)}.faq-a{padding:0 1.25rem 1.25rem;color:var(--muted);font-size:.92rem;line-height:1.7;max-height:0;overflow:hidden;transition:max-height .25s ease,padding .25s ease}.faq-item.open .faq-a{max-height:300px;padding:0 1.25rem 1.25rem}.cta-section{text-align:center;padding:4rem 1.5rem 6rem}.cta-section h2{font-size:clamp(1.5rem,4vw,2.2rem);margin-bottom:.5rem}.cta-section p.sub{color:var(--muted);margin-bottom:2rem;font-size:1.05rem}footer{text-align:center;padding:3rem 1.5rem;color:var(--muted);font-size:.85rem;border-top:1px solid var(--border)}footer a{color:var(--accent);text-decoration:none}.reveal{opacity:0;transform:translateY(24px);transition:opacity .5s ease,transform .5s ease}.reveal.visible{opacity:1;transform:translateY(0)}.reveal:nth-child(2){transition-delay:.08s}.reveal:nth-child(3){transition-delay:.16s}.reveal:nth-child(4){transition-delay:.24s}@media(max-width:768px){nav .nav-links{gap:.8rem}nav .nav-links a{font-size:.82rem}.hero{padding:5rem 1.2rem 3rem;min-height:auto}section{padding:3.5rem 1.2rem}.stats{gap:1.5rem;padding:2rem 1rem}.features{grid-template-columns:1fr}.steps{flex-direction:column;align-items:center}.step{max-width:100%}.demo-form{flex-direction:column}.demo-form input[type=url]{width:100%}.code-section pre{font-size:.8rem}}@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}.reveal{opacity:1;transform:none}.hero .badge:before{animation:none}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}