:root{
  --blue-50:#eff8ff;
  --blue-100:#d9edff;
  --blue-500:#2b8fe0;
  --blue-600:#1e7ac7;
  --blue-700:#16609e;
  --text:#22303c;
  --muted:#6b7a88;
  --border:#e3ebf2;
  --bg:#f6fafd;
  --danger:#d9534f;
  --radius:14px;
  --shadow:0 2px 10px rgba(30,122,199,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;
}
a{color:var(--blue-600);text-decoration:none}
a:hover{color:var(--blue-700)}

/* 导航 */
.nav{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}
.nav-inner{max-width:900px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between}
.logo{font-weight:700;font-size:1.15rem;color:var(--blue-600)}
.nav-links{display:flex;gap:22px}
.nav-links a{color:var(--muted);font-weight:500;padding:4px 2px;border-bottom:2px solid transparent}
.nav-links a:hover,.nav-links a.active{color:var(--blue-600);border-bottom-color:var(--blue-600)}
.menu-btn{display:none;background:none;border:none;font-size:1.4rem;cursor:pointer;color:var(--blue-600)}

/* 布局 */
.container{max-width:900px;margin:0 auto;padding:28px 20px 60px}
.hero{text-align:center;padding:24px 0 8px}
.hero h1{font-size:1.9rem;color:var(--blue-700);margin-bottom:8px}
.hero p{color:var(--muted)}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin-top:22px}
.card h3{margin-bottom:14px;color:var(--blue-700)}
.muted{color:var(--muted);font-weight:400;font-size:.9em}
.empty{color:var(--muted);text-align:center;padding:16px 0}

/* 今日概览 */
.today-summary{display:flex;align-items:center;gap:28px;flex-wrap:wrap}
.progress-ring{position:relative;width:140px;height:140px;flex-shrink:0}
.progress-ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring-bg{fill:none;stroke:var(--blue-100);stroke-width:10}
.ring-fg{fill:none;stroke:var(--blue-500);stroke-width:10;stroke-linecap:round;stroke-dasharray:326.7;stroke-dashoffset:326.7;transition:stroke-dashoffset .6s ease}
.ring-text{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.ring-text strong{font-size:1.25rem;color:var(--blue-600)}
.ring-text span{font-size:.78rem;color:var(--muted)}
.summary-info h2{font-size:1.2rem;margin-bottom:6px}
.summary-info h2 span{color:var(--blue-600)}
.summary-info p{color:var(--muted)}

/* 按钮 */
.btn-row{display:flex;gap:12px;flex-wrap:wrap}
.btn{
  background:var(--blue-50);color:var(--blue-600);border:1px solid var(--blue-100);
  padding:10px 20px;border-radius:10px;font-size:.95rem;cursor:pointer;transition:.2s;
}
.btn:hover{background:var(--blue-100);transform:translateY(-1px)}
.btn.primary{background:var(--blue-500);color:#fff;border-color:var(--blue-500)}
.btn.primary:hover{background:var(--blue-600)}
.btn.danger{background:#fdf0f0;color:var(--danger);border-color:#f3d3d2;margin-top:16px}
.btn.danger:hover{background:#fbe3e2}
.quick-add{margin-top:24px}
.custom-add{margin-top:24px}
.form-row{display:flex;gap:14px;flex-wrap:wrap;align-items:flex-end}
.form-row label{display:flex;flex-direction:column;font-size:.85rem;color:var(--muted);gap:6px}
.form-row input{
  border:1px solid var(--border);border-radius:8px;padding:9px 12px;font-size:.95rem;
  color:var(--text);background:var(--blue-50);min-width:130px;
}
.form-row input:focus{outline:2px solid var(--blue-100);border-color:var(--blue-500)}

/* 记录列表 */
.record-list{list-style:none}
.record-list li{
  display:flex;justify-content:space-between;align-items:center;
  padding:12px 4px;border-bottom:1px dashed var(--border);
}
.record-list li:last-child{border-bottom:none}
.record-list .time{color:var(--muted);font-size:.9rem}
.record-list .amount{font-weight:600;color:var(--blue-600)}
.record-list .del{background:none;border:none;color:var(--muted);cursor:pointer;font-size:1rem;padding:2px 6px}
.record-list .del:hover{color:var(--danger)}

/* 历史 */
.chart{display:flex;align-items:flex-end;gap:12px;height:180px;padding:10px 4px 0}
.bar-col{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;height:100%;justify-content:flex-end}
.bar{width:100%;max-width:44px;background:var(--blue-500);border-radius:6px 6px 0 0;min-height:3px;transition:height .5s ease}
.bar-col .val{font-size:.75rem;color:var(--blue-600);font-weight:600}
.bar-col .day{font-size:.75rem;color:var(--muted)}
.day-block{margin-top:8px}
.day-block h4{color:var(--blue-700);margin:14px 0 4px;font-size:1rem}

/* 小知识 */
.tips-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin-top:22px}
.tip{margin-top:0}
.tip-icon{font-size:1.6rem;margin-bottom:8px}
.tip p{color:var(--muted);font-size:.93rem}

/* 页脚 */
.footer{border-top:1px solid var(--border);background:#fff;text-align:center;padding:24px 20px;color:var(--muted);font-size:.88rem;margin-top:20px}
.footer a{margin:0 6px}

/* 动画 */
.fade-in{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.fade-in.show{opacity:1;transform:none}

/* 响应式 */
@media (max-width:640px){
  .menu-btn{display:block}
  .nav-links{
    display:none;position:absolute;top:100%;left:0;right:0;background:#fff;
    flex-direction:column;gap:0;border-bottom:1px solid var(--border);box-shadow:var(--shadow);
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 20px;border-bottom:none}
  .nav-links a.active{background:var(--blue-50)}
  .today-summary{justify-content:center;text-align:center}
  .hero h1{font-size:1.5rem}
}