:root{--background:#07111f;--foreground:#eef6ff;--muted:#91a4bb;--card:hsla(0,0%,100%,.1);--card-strong:hsla(0,0%,100%,.16);--line:hsla(0,0%,100%,.16);--accent:#5eead4;--accent-2:#8b5cf6;--danger:#fecaca}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 12% 10%,rgba(94,234,212,.22),transparent 30rem),radial-gradient(circle at 84% 4%,rgba(139,92,246,.28),transparent 32rem),linear-gradient(135deg,#07111f,#0b1630 52%,#101827);color:var(--foreground);font-family:Microsoft YaHei,PingFang SC,Arial,sans-serif;min-height:100vh}button,input,select,textarea{font:inherit}button{border:0;border-radius:999px;background:linear-gradient(135deg,var(--accent),#a7f3d0);color:#06211e;cursor:pointer;font-weight:800;padding:.9rem 1.2rem;transition:transform .2s ease,opacity .2s ease,box-shadow .2s ease;box-shadow:0 18px 40px rgba(94,234,212,.18)}button:hover{transform:translateY(-1px)}button:disabled{cursor:wait;opacity:.65;transform:none}a{color:inherit}.download-shell,.shell{width:min(1120px,calc(100% - 32px));margin:0 auto;padding:56px 0}.hero{display:grid;grid-template-columns:1.05fr .95fr;grid-gap:28px;gap:28px;align-items:center;min-height:70vh}.download-card h1,.hero-copy h1{font-size:clamp(2.3rem,6vw,5.4rem);letter-spacing:-.08em;line-height:.95;margin:.35rem 0 1rem}.download-card h1{font-size:clamp(2rem,8vw,4rem);overflow-wrap:anywhere}.subtitle{color:#bed0e3;font-size:1.1rem;line-height:1.8;max-width:680px}.eyebrow{color:var(--accent);font-size:.8rem;font-weight:900;letter-spacing:.2em;margin:0;text-transform:uppercase}.feature-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}.feature-row span,.hint,.success{border:1px solid var(--line);border-radius:999px;background:hsla(0,0%,100%,.08);color:#d9ecff;padding:.55rem .8rem}.download-card,.notes,.result-card,.upload-card{-webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px);background:linear-gradient(180deg,var(--card-strong),var(--card));border:1px solid var(--line);border-radius:32px;box-shadow:0 30px 80px rgba(0,0,0,.28)}.upload-card{display:grid;grid-gap:18px;gap:18px;padding:24px}label{color:#d8e8f9;display:grid;grid-gap:8px;gap:8px;font-weight:750}input,select,textarea{border:1px solid hsla(0,0%,100%,.18);border-radius:18px;background:rgba(3,10,25,.58);color:#f7fbff;outline:0;padding:.85rem .95rem}input:focus,select:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 4px rgba(94,234,212,.15)}textarea{resize:vertical}.drop-zone{border:1.5px dashed rgba(94,234,212,.5);border-radius:24px;background:rgba(94,234,212,.08);padding:22px}.drop-zone span{font-size:1.2rem}.drop-zone small,.muted{color:var(--muted);font-weight:500}.grid-two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:14px;gap:14px}.result-card{display:grid;grid-template-columns:1fr auto;grid-gap:24px;gap:24px;margin-top:28px;padding:24px}.notes h2,.result-card h2{font-size:clamp(1.6rem,3vw,2.4rem);letter-spacing:-.04em;margin:.35rem 0}.link-box{align-items:center;border:1px solid var(--line);border-radius:20px;display:grid;grid-gap:10px;gap:10px;grid-template-columns:1fr auto;margin-top:16px;padding:10px}.link-box span{color:#dcecff;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.link-box button{box-shadow:none;padding:.65rem .9rem}.link-box.secondary{background:hsla(0,0%,100%,.05)}.qr-card{align-items:center;display:grid;grid-gap:12px;gap:12px;justify-items:center}.qr-card img{background:#fff;border-radius:24px;padding:10px;width:220px}.notes{margin-top:28px;padding:24px}.notes ol{color:#c6d8eb;line-height:1.9;margin-bottom:0}.download-shell{display:grid;min-height:100vh;place-items:center}.download-card{max-width:680px;padding:clamp(24px,6vw,44px);width:100%}.password-form{display:grid;grid-gap:16px;gap:16px;margin-top:24px}.text-preview{background:rgba(3,10,25,.55);border:1px solid var(--line);border-radius:20px;color:#e8f4ff;line-height:1.65;max-height:260px;overflow:auto;padding:16px;white-space:pre-wrap}.error{background:rgba(127,29,29,.35);border:1px solid hsla(0,94%,82%,.45);border-radius:18px;color:var(--danger);margin:10px 0 0;padding:.85rem 1rem}.success{color:#bbf7d0;display:inline-block;margin-top:12px}.hint{color:#d9ecff;margin-top:14px}.back-link{color:var(--accent);display:inline-block;font-weight:800;margin-top:24px;text-decoration:none}@media (max-width:820px){.download-shell,.shell{width:min(100% - 22px,1120px);padding:28px 0}.grid-two,.hero,.result-card{grid-template-columns:1fr}.hero{min-height:auto}.result-card{text-align:left}.qr-card{justify-items:start}.link-box{grid-template-columns:1fr}}