:root{--ink:#1f1720;--muted:#756a73;--line:#f0e4e8;--rose:#c52c48;--deep-rose:#9d1f38;--soft:#fff5f7;--teal:#117a76;--bg:#fffafb;--card:#fff;font-family:PingFang SC,Segoe UI,Helvetica Neue,Arial,sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}html,body,#app{margin:0;min-height:100%}body{background:radial-gradient(120% 80% at 10% -10%,#ffe4ea 0%,transparent 55%),radial-gradient(90% 70% at 100% 0%,#dff7f3 0%,transparent 45%),var(--bg)}button,input{font:inherit}.page{min-height:100vh;padding:28px 18px 40px;display:flex;justify-content:center}.shell{width:min(440px,100%)}.brand{display:flex;align-items:center;gap:12px;margin-bottom:18px}.brand-mark{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,#d72f4b,#ff7259);color:#fff;display:grid;place-items:center;font-weight:800}.brand h1{margin:0;font-size:22px}.brand p{margin:4px 0 0;color:var(--muted);font-size:13px}.card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:20px 18px 18px;box-shadow:0 18px 40px #501e2d14}.invite-chip{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;background:#eaf8f5;color:var(--teal);font-size:12px;font-weight:700;margin-bottom:14px}.field{margin-bottom:14px}.field label{display:block;font-size:12px;font-weight:700;margin-bottom:7px}.field input{width:100%;height:46px;border-radius:14px;border:1px solid #eadde2;padding:0 14px;background:#fff;outline:none}.field input:focus{border-color:#e77683;box-shadow:0 0 0 3px #c52c481f}.field input[readonly]{background:#faf6f7;color:var(--muted)}.row{display:flex;gap:10px}.row input{flex:1}.btn{height:48px;border:0;border-radius:15px;padding:0 16px;font-weight:700;cursor:pointer}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{width:100%;color:#fff;background:linear-gradient(135deg,#d72f4b,#ff7259)}.btn-ghost{color:var(--deep-rose);background:var(--soft);white-space:nowrap}.error{color:var(--deep-rose);background:#fff1f3;border-radius:12px;padding:10px 12px;font-size:13px;margin-bottom:12px}.hint{color:var(--muted);font-size:12px;line-height:1.5;margin-top:12px}.platform-grid{display:grid;gap:12px;margin-top:8px}.platform{border:1px solid var(--line);border-radius:18px;padding:16px;background:#fff;text-align:left;cursor:pointer}.platform.active{border-color:#e77683;box-shadow:0 0 0 1px #e77683 inset;background:#fff7f8}.platform strong{display:block;font-size:16px}.platform span{display:block;margin-top:6px;color:var(--muted);font-size:12px}.success{background:#eaf8f5;color:var(--teal);border-radius:12px;padding:10px 12px;font-size:13px;margin-bottom:14px}.wx-page{min-height:100vh;padding:18px 16px 28px;display:flex;flex-direction:column;background:#141016}.wx-arrow{align-self:flex-end;margin:4px 6px 10px 0;animation:wx-bounce 1.4s ease-in-out infinite}.wx-panel{margin:auto 0 0;background:#fff;border-radius:24px;padding:22px 18px 18px;box-shadow:0 20px 48px #00000047;color:var(--ink)}.wx-brand{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:28px;padding:0 12px;border-radius:999px;background:linear-gradient(135deg,#d72f4b,#ff7259);color:#fff;font-size:12px;font-weight:800;margin-bottom:12px}.wx-panel h2{margin:0 0 8px;font-size:22px;letter-spacing:.02em}.wx-lead{margin:0 0 16px;color:var(--muted);font-size:14px;line-height:1.55}.wx-steps{margin:0;padding-left:20px;display:grid;gap:10px;font-size:15px;line-height:1.45}.wx-steps strong{color:var(--deep-rose)}.wx-note{margin:16px 0 0;color:var(--muted);font-size:12px;line-height:1.5}@keyframes wx-bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-6px)}}