:root{color-scheme:light dark;--bg:#edf0f4;--card:#fff;--ink:#17202b;--muted:#647080;--accent:#245a9c;--line:#dce2e9;--tint:#eaf1f9;--shadow:0 18px 60px #1d35500b;--radius:28px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;font-size:106.25%;line-height:1.65}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink)}header,footer{max-width:1120px;margin:auto;padding:32px 36px;display:flex;align-items:center;justify-content:space-between;gap:20px}a{color:var(--accent);text-decoration:none}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);font-weight:600;font-size:1.1765rem;white-space:nowrap}.brand span{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:linear-gradient(145deg,#5b96dc,#153d72);box-shadow:0 4px 12px #245a9c26;color:white}small,footer{color:var(--muted)}main{max-width:1120px;margin:8vh auto 12vh;padding:0 36px;display:grid;grid-template-columns:1.05fr 1fr;gap:76px;align-items:center}.eyebrow{font-size:0.8235rem;letter-spacing:.08em;color:var(--accent);font-weight:600}h1{font-size:clamp(2.2353rem,4vw,3.1765rem);line-height:1.25;letter-spacing:-.045em;margin:20px 0 28px;font-weight:600}p{color:var(--muted);max-width:38em}.privacy{margin-top:42px;font-size:0.8235rem}.card{background:var(--card);padding:36px;border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid #ffffff80;min-width:0}h2{font-size:1.4706rem;margin:0 0 28px;letter-spacing:-.02em;font-weight:600}label{display:block;font-size:0.8235rem;margin-bottom:10px;color:var(--muted)}input,button{font:inherit;border-radius:14px;min-height:54px;width:100%;border:1px solid var(--line)}input{color:var(--ink);background:var(--bg);padding:12px 16px;min-width:0}input::placeholder{color:var(--muted)}button{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--accent);color:#fff;border-color:transparent;padding:12px 18px;margin-top:16px;cursor:pointer;font-weight:600}button:disabled{opacity:.6;cursor:wait}button[hidden]{display:none}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #6aa2eb;outline-offset:4px}.hint{font-size:0.7647rem;margin:24px 0 0;line-height:1.8}#result:empty{display:none}#result{margin-top:24px;padding:20px;background:var(--tint);border-radius:16px;overflow-wrap:anywhere}#result h3{margin:0 0 8px;font-size:1.1765rem}#result p{margin:6px 0;font-size:0.8235rem}footer{font-size:0.7647rem;border-top:1px solid var(--line);padding-top:24px}main.support{display:block;max-width:700px}main.support .intro{margin-bottom:32px}main.support h1{font-size:2.3529rem}html[dir=rtl] button span{transform:scaleX(-1)}@media(prefers-color-scheme:dark){:root{--bg:#0b0f15;--card:#141a24;--ink:#edf2f8;--muted:#a1adbd;--accent:#a6c8ff;--line:#2a3544;--tint:#1c2b42;--shadow:0 18px 60px #0002}.card{border-color:#273140}button{color:#102341}}@media(max-width:900px){header,footer{padding:24px}header small{font-size:0.7059rem}main{display:block;margin:32px auto 56px;padding:0 24px}.intro{margin-bottom:32px}h1{font-size:2.2353rem;margin:16px 0 20px}.privacy{margin-top:24px}.card{padding:26px}.brand{font-size:1.0588rem}main.support h1{font-size:2.0000rem}}@media(prefers-reduced-motion:no-preference){button{transition:filter .15s}button:hover{filter:brightness(1.08)}}