:root{
  --primary:#2563eb; --primary-d:#1d4ed8; --primary-l:#eef4ff;
  --bg:#f2f5fa; --card:#ffffff; --line:#e8ecf3;
  --text:#0f172a; --sub:#64748b; --muted:#94a3b8;
  --green:#16a34a; --green-l:#e9f9ef; --red:#dc2626; --red-l:#fdecec;
  --amber:#d97706; --amber-l:#fff6e6;
  --shadow:0 6px 20px rgba(15,23,42,.06);
  --shadow-s:0 1px 4px rgba(15,23,42,.06);
  --r:16px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0;height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  background:var(--bg);color:var(--text);font-size:15px;line-height:1.45}
.hidden{display:none !important}
.sub{color:var(--sub);font-size:13px}
.muted{color:var(--muted)}

/* ---------- 登录 ---------- */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;
  background:radial-gradient(120% 80% at 50% 0%,#dbe7ff 0%,#f2f5fa 55%)}
.auth-card{width:100%;max-width:400px;background:var(--card);border-radius:22px;
  padding:30px 24px 26px;box-shadow:var(--shadow);text-align:center}
.brand-mark{width:60px;height:60px;margin:0 auto 12px;border-radius:18px;display:grid;place-items:center;
  font-size:30px;background:linear-gradient(135deg,#3b82f6,#1e40af);color:#fff;box-shadow:0 8px 20px rgba(37,99,235,.35)}
.brand-name{margin:0;font-size:23px;letter-spacing:.5px}
.brand-sub{margin:4px 0 0;color:var(--sub);font-size:13px}
.seg{display:flex;background:#eef2f9;border-radius:12px;padding:4px;margin:20px 0 6px}
.seg button{flex:1;background:transparent;color:var(--sub);padding:9px;border:none;border-radius:9px;
  font-size:15px;font-family:inherit;cursor:pointer;font-weight:500}
.seg button.active{background:#fff;color:var(--primary);font-weight:600;box-shadow:var(--shadow-s)}
.form{text-align:left;margin-top:14px}
.fld{display:block;margin-bottom:14px}
.fld>span{display:block;font-size:13px;color:var(--sub);margin-bottom:6px}
input,select{width:100%;padding:12px 13px;border:1.5px solid var(--line);border-radius:12px;font-size:15px;
  background:#fafbfe;color:var(--text);font-family:inherit;transition:.15s}
input:focus,select:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px var(--primary-l)}
.btn{width:100%;border:none;border-radius:12px;padding:13px;font-size:15px;font-weight:600;
  font-family:inherit;cursor:pointer;transition:.15s}
.btn.primary{background:var(--primary);color:#fff;margin-top:8px}
.btn.primary:active{background:var(--primary-d)}
.btn.ghost{background:#eef2f9;color:var(--text)}
.btn.danger{background:var(--red);color:#fff}
.btn.sm{padding:9px 14px;width:auto;font-size:14px}
.msg{margin-top:14px;font-size:13px;min-height:18px}
.msg.err{color:var(--red)} .msg.ok{color:var(--green)}

/* ---------- 顶栏 ---------- */
.appbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:10px;
  padding:12px 16px calc(12px + env(safe-area-inset-top,0)) 16px;
  background:linear-gradient(120deg,#2563eb,#1e40af);color:#fff;
  padding-top:calc(12px + env(safe-area-inset-top,0))}
.vehicle-chip{display:flex;align-items:center;gap:6px;background:rgba(255,255,255,.16);
  padding:8px 12px;border-radius:12px;font-weight:600;font-size:15px;cursor:pointer;max-width:70%;
  backdrop-filter:blur(4px)}
.vehicle-chip #vehicleName{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.appbar .spacer{flex:1}
.sync-dot{width:9px;height:9px;border-radius:50%;background:#9aa5b1;margin-left:auto;
  box-shadow:0 0 0 3px rgba(255,255,255,.15)}
.sync-dot.on{background:#4ade80} .sync-dot.off{background:#f87171}

/* ---------- 内容 ---------- */
main{padding:16px;max-width:640px;margin:0 auto;padding-bottom:96px}
.card{background:var(--card);border-radius:var(--r);padding:18px;margin-bottom:14px;box-shadow:var(--shadow-s)}
.card h3{margin:0 0 14px;font-size:16px;display:flex;align-items:center;gap:8px}
.row{display:flex;gap:12px}.row>*{flex:1;min-width:0}
.hint{font-size:12px;color:var(--muted);margin-top:6px}
.divider{height:1px;background:var(--line);margin:14px 0}

/* 分段选择 */
.seg-line{display:flex;gap:10px;margin-bottom:16px}
.seg-line button{flex:1;padding:12px;background:#fff;color:var(--sub);border:1.5px solid var(--line);
  border-radius:12px;font-size:15px;font-weight:600;font-family:inherit;cursor:pointer}
.seg-line button.active{background:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 6px 16px rgba(37,99,235,.28)}

/* 结果卡片 */
.result{background:linear-gradient(135deg,#2563eb,#1e40af);color:#fff;border-radius:var(--r);
  padding:20px;margin-bottom:14px;box-shadow:0 10px 26px rgba(37,99,235,.32)}
.result .lbl{font-size:13px;opacity:.85}
.result .big{font-size:34px;font-weight:700;line-height:1.1;margin-top:2px}
.result .big small{font-size:14px;font-weight:500;opacity:.9}
.result .grid{display:flex;gap:14px;margin-top:14px;flex-wrap:wrap}
.result .grid .cell{background:rgba(255,255,255,.14);border-radius:10px;padding:8px 12px;font-size:13px}

/* 列表 */
.list-item{display:flex;justify-content:space-between;align-items:center;padding:13px 0;border-bottom:1px solid var(--line)}
.list-item:last-child{border-bottom:none}
.list-item .main{flex:1;min-width:0}
.list-item .t{font-weight:600;font-size:15px}
.list-item .s{font-size:12.5px;color:var(--sub);margin-top:3px}
.list-item .amt{font-weight:700}
.icon-btn{width:38px;height:38px;border-radius:11px;border:none;background:#eef2f9;color:var(--text);
  display:grid;place-items:center;cursor:pointer}
.icon-btn.del{background:var(--red-l);color:var(--red)}
.tag{display:inline-block;font-size:11px;padding:1px 7px;border-radius:6px;background:var(--amber-l);color:var(--amber);margin-left:6px}

/* 统计 */
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.stat{background:linear-gradient(180deg,#f8faff,#f1f5fd);border:1px solid #eaf0fb;border-radius:14px;padding:14px;text-align:center}
.stat .v{font-size:21px;font-weight:700;color:var(--primary)}
.stat .k{font-size:12px;color:var(--sub);margin-top:3px}
canvas{max-width:100%}

/* 车型卡片 */
.veh-card{display:flex;align-items:center;gap:12px;padding:14px;border:1.5px solid var(--line);
  border-radius:14px;margin-bottom:10px;cursor:pointer;background:#fff}
.veh-card.active{border-color:var(--primary);background:var(--primary-l)}
.veh-ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:22px;
  background:var(--primary-l);color:var(--primary)}
.veh-card .info{flex:1;min-width:0}
.veh-card .nm{font-weight:600}
.veh-card .mt{font-size:12.5px;color:var(--sub);margin-top:2px}

/* 底部导航 */
.tabbar{position:fixed;bottom:0;left:0;right:0;display:flex;background:rgba(255,255,255,.96);
  border-top:1px solid var(--line);backdrop-filter:blur(10px);z-index:20;
  padding-bottom:env(safe-area-inset-bottom,0)}
.tabbar button{flex:1;background:none;border:none;display:flex;flex-direction:column;align-items:center;gap:3px;
  padding:9px 0 8px;color:var(--muted);font-size:11px;font-family:inherit;cursor:pointer}
.tabbar button svg{width:23px;height:23px}
.tabbar button.active{color:var(--primary)}
.tabbar button.active svg{filter:drop-shadow(0 2px 4px rgba(37,99,235,.35))}

/* 弹层 */
.modal-mask{position:fixed;inset:0;background:rgba(15,23,42,.45);z-index:40;display:flex;
  align-items:flex-end;justify-content:center;animation:fade .15s}
@media(min-width:520px){.modal-mask{align-items:center}}
.modal{background:#fff;width:100%;max-width:520px;border-radius:20px 20px 0 0;padding:20px 18px calc(20px + env(safe-area-inset-bottom,0));
  max-height:90vh;overflow:auto;animation:up .2s}
@media(min-width:520px){.modal{border-radius:20px}}
.modal h3{margin:0 0 16px;font-size:17px}
.modal .actions{display:flex;gap:10px;margin-top:18px}
@keyframes fade{from{opacity:0}}
@keyframes up{from{transform:translateY(24px);opacity:.6}}

.toast{position:fixed;left:50%;bottom:100px;transform:translateX(-50%) translateY(10px);
  background:rgba(15,23,42,.92);color:#fff;padding:10px 18px;border-radius:22px;font-size:14px;
  z-index:60;opacity:0;transition:.22s;pointer-events:none;max-width:86%;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

.empty{text-align:center;color:var(--muted);padding:34px 0;font-size:14px}