:root{color-scheme:light;--ink:#233647;--muted:#5a6b70;--teal:#276c65;--line:#dedfd5;--cream:#faf8f2}*{box-sizing:border-box}body{margin:0;background:var(--cream);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.7}a{color:var(--teal);text-decoration:none}header,footer{max-width:1160px;margin:auto;padding:25px 30px;display:flex;align-items:center;justify-content:space-between;gap:20px}header{border-bottom:1px solid var(--line);font-size:14px}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);font-weight:700;font-size:18px;letter-spacing:1px}.brand small{display:block;font-size:11px;font-weight:400;color:var(--muted)}.logo{width:44px;height:44px;display:grid;place-items:center;background:var(--teal);color:white;border-radius:12px;font:28px Georgia,serif}main{max-width:1100px;margin:65px auto 75px;padding:0 30px;display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:start}.eyebrow{font-size:13px;color:var(--teal);letter-spacing:2px;font-weight:700;margin:0 0 20px}h1{font-size:44px;line-height:1.5;letter-spacing:-1px;margin:0 0 24px}h1 span{color:var(--teal)}.lead{font-size:17px;color:var(--muted);line-height:1.95}.steps{padding:0;list-style:none;display:flex;gap:26px;margin:38px 0;font-size:12px}.steps b{display:block;font:26px Georgia,serif;color:var(--teal);margin-bottom:8px}aside{border-top:1px solid var(--line);padding-top:22px;color:var(--muted);font-size:13px;max-width:380px}aside strong{color:var(--ink)}aside p{margin:8px 0}.panel{background:#fffefa;border:1px solid var(--line);border-radius:20px;padding:36px;box-shadow:0 12px 38px #23364708;min-width:0}.panel h2{font-size:26px;line-height:1.5;margin:0 0 12px;overflow-wrap:anywhere}.panel .eyebrow{margin-bottom:12px}.muted{color:var(--muted);font-size:14px;white-space:pre-line}label{display:block;font-size:14px;font-weight:700;margin:27px 0 8px}input{width:100%;border:1px solid #a7b9af;border-radius:10px;background:#fff;padding:14px 15px;font-size:17px;color:var(--ink);min-height:52px}button{width:100%;padding:14px 18px;border:1px solid var(--teal);border-radius:10px;background:var(--teal);color:white;font-size:15px;cursor:pointer;min-height:50px;margin-top:17px}button span{float:right}button:disabled{opacity:.6;cursor:wait}button:hover{filter:brightness(.96)}input:focus-visible,button:focus-visible,a:focus-visible{outline:3px solid #95b9ad;outline-offset:3px}.help{font-size:12px;color:var(--muted);margin:23px 0 0;line-height:1.9}#message{color:#9c392d;font-size:14px;margin:14px 0 0}#message:empty{display:none}.success{display:inline-block;background:#eaf1e9;color:var(--teal);padding:5px 12px;border-radius:20px;font-size:12px;margin-bottom:18px}.file{padding:18px 0;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:15px;justify-content:space-between}.file div{min-width:0}.file strong{font-size:14px;display:block;overflow-wrap:anywhere}.file small{color:var(--muted)}.file a{flex-shrink:0;border:1px solid #b6c8bc;padding:8px 14px;border-radius:8px;font-size:13px;min-height:44px;display:flex;align-items:center}.secondary{background:transparent;color:var(--teal);border-color:#b6c8bc;font-size:13px}footer{border-top:1px solid var(--line);font-size:12px;color:var(--muted)}[hidden]{display:none!important}@media(max-width:850px){main{gap:35px;margin-top:40px}h1{font-size:35px}.panel{padding:26px}.steps{gap:15px}}@media(max-width:620px){header,footer{padding:20px}.brand{font-size:15px}header>a:last-child{font-size:12px}.brand small{font-size:10px}main{display:block;padding:0 20px;margin:30px auto 42px}h1{font-size:32px}.intro .eyebrow{margin-bottom:12px}.lead{font-size:15px}.steps{margin:22px 0 28px;gap:30px}.steps b{font-size:22px}aside{display:none}.panel{padding:25px;border-radius:15px}.panel h2{font-size:24px}footer{align-items:flex-start;font-size:11px}.file{gap:8px}}