*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
:root{
  --bg:#f2f3f5;
  --card:#fff;
  --line:#f5f5f5;
  --text:#16161a;
  --sub:#8a8f99;
  --muted:#c4c7cc;
  --blue:#2878ff;
  --blue-dark:#1565ff;
  --green:#21c17e;
  --red:#f6465d;
}
html,body{background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Helvetica Neue","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;color:var(--text)}
.app{max-width:480px;margin:0 auto;min-height:100vh;background:var(--bg);display:flex;flex-direction:column}

/* ===== 顶栏 ===== */
.navbar{height:52px;background:var(--card);display:flex;align-items:center;justify-content:space-between;padding:0 6px;position:sticky;top:0;z-index:10}
.navbar .nav-left,.navbar .nav-right{width:44px;display:flex;align-items:center;justify-content:center}
.navbar .nav-back{width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;color:var(--text);transition:background .15s}
.navbar .nav-back:active{background:#f0f1f4}
.navbar .nav-title{font-size:16px;font-weight:600;letter-spacing:.5px}
.navbar .nav-right{color:var(--sub);font-size:12px;font-weight:500}

/* 钱包状态小胶囊 */
.wallet-chip{display:flex;align-items:center;gap:4px;font-size:11px;color:var(--sub);white-space:nowrap}
.wallet-chip .dot{width:6px;height:6px;border-radius:50%;background:var(--muted)}
.wallet-chip.on .dot{background:var(--green)}
.wallet-chip.on{color:var(--green)}

/* ===== 代币头 ===== */
.token-head{display:flex;align-items:center;gap:10px;padding:14px 16px 6px}
.token-head .tk{width:36px;height:36px;border-radius:50%;overflow:hidden;flex-shrink:0}
.token-head .tk-sym{font-size:16px;font-weight:600;line-height:1.2}
.token-head .tk-name{font-size:11px;color:var(--sub);margin-top:1px}
.token-head .tk-chain{margin-left:auto;display:flex;align-items:center;gap:4px;padding:4px 10px;border:1px solid #eef0f3;border-radius:14px;font-size:11px;color:var(--sub)}

/* ===== 卡片 ===== */
.card{background:var(--card);border-radius:16px;margin:6px 12px;overflow:hidden}
.card .row{display:flex;align-items:center;min-height:64px;padding:0 16px;position:relative;gap:8px}
.card .row + .row::before{content:"";position:absolute;top:0;left:16px;right:0;height:1px;background:var(--line)}
.card .lbl{font-size:14px;color:var(--text);flex-shrink:0}
.card .lbl.muted{color:var(--sub)}
.card input{flex:1;min-width:0;border:none;outline:none;background:transparent;font-size:15px;color:var(--text);height:56px}
.card input::placeholder{color:var(--muted)}

/* 粘贴 */
.paste{font-size:13px;color:var(--blue);font-weight:500;border:none;background:none;cursor:pointer;flex-shrink:0;padding:4px 2px}
.paste:active{opacity:.6}

/* 数量 */
.amount-row .amount-input{font-size:24px;font-weight:600;letter-spacing:.5px}
.amount-row .unit{font-size:14px;color:var(--sub);font-weight:500;flex-shrink:0}
.amount-bal{display:flex;align-items:center;justify-content:space-between;padding:0 16px 12px;font-size:12px;color:var(--sub)}
.amount-bal b{font-weight:600;color:var(--text)}
.quick{padding:0 16px 14px;display:flex;gap:10px}
.quick button{flex:1;height:34px;border:1px solid #eef0f3;background:#fafbfc;border-radius:8px;font-size:13px;color:#4b5563;cursor:pointer;transition:all .15s}
.quick button:active{background:var(--blue);border-color:var(--blue);color:#fff}

/* 费用 */
.fee-row{display:flex;align-items:center;justify-content:space-between;min-height:52px;padding:0 16px}
.fee-row .lbl{font-size:14px;color:var(--text)}
.fee-row .val{font-size:14px;color:var(--sub)}
.fee-row .refresh{display:flex;align-items:center;gap:4px;border:none;background:none;color:var(--blue);font-size:12px;cursor:pointer;margin-right:14px}

/* ===== 底部按钮 ===== */
.bottom{padding:10px 16px calc(12px + env(safe-area-inset-bottom));background:var(--card);border-top:1px solid #f2f3f5;position:sticky;bottom:0;margin-top:auto}
.send{width:100%;height:50px;border:none;border-radius:25px;background:linear-gradient(90deg,#3d8bff,#2878ff);color:#fff;font-size:16px;font-weight:600;letter-spacing:3px;cursor:pointer;box-shadow:0 8px 24px rgba(40,120,255,.3);transition:transform .1s}
.send:active{transform:scale(.98)}
.send[disabled]{background:#cfd6e4;box-shadow:none}

/* ===== 结果覆盖层 ===== */
.overlay{position:fixed;inset:0;background:rgba(255,255,255,.98);z-index:2000;display:flex;flex-direction:column;align-items:center;justify-content:center;animation:fadeIn .2s}
.overlay .ic{width:72px;height:72px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:22px}
.overlay .t{font-size:18px;font-weight:600;margin-bottom:8px}
.overlay .s{font-size:13px;color:var(--sub);padding:0 36px;text-align:center;line-height:1.6;margin-bottom:32px;word-break:break-all}
.overlay .ok{width:200px;height:46px;border:none;border-radius:23px;background:linear-gradient(90deg,#3d8bff,#2878ff);color:#fff;font-size:15px;font-weight:600;cursor:pointer}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}