:root {
    --bg:#f5f5f7;
    --text:#1d1d1f;
    --muted:#6e6e73;
    --accent:#0071e3;
    --red:#ff3b30;
    --green:#2fb344;
    --border:rgba(0,0,0,.08);
    --border-strong:rgba(0,0,0,.16);
    --radius:18px;
    --shadow-card:0 1px 2px rgba(0,0,0,.04), 0 10px 30px rgba(0,0,0,.06);
    --shadow-pop:0 4px 12px rgba(0,0,0,.06), 0 20px 50px rgba(0,0,0,.14);
  }
  * { box-sizing:border-box; }
  html, body { height:100%; }
  body {
    margin:0; color:var(--text); background:var(--bg);
    font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro SC","PingFang SC","Helvetica Neue","Microsoft YaHei",sans-serif;
    -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  }
  /* 柔和彩色光晕（macOS 壁纸感） */
  .aurora { position:fixed; inset:0; z-index:-1; overflow:hidden; pointer-events:none; }
  .blob { position:absolute; border-radius:50%; filter:blur(110px); }
  .b1 { width:640px; height:640px; background:#c7dcff; opacity:.62; top:-220px; left:-160px; animation:drift1 34s ease-in-out infinite alternate; }
  .b2 { width:620px; height:620px; background:#ffd9ec; opacity:.5; bottom:-240px; right:-140px; animation:drift2 40s ease-in-out infinite alternate; }
  .b3 { width:520px; height:520px; background:#e2d9ff; opacity:.5; top:12%; right:8%; animation:drift3 46s ease-in-out infinite alternate; }
  .b4 { width:460px; height:460px; background:#ffeccf; opacity:.42; bottom:2%; left:12%; animation:drift1 38s ease-in-out infinite alternate-reverse; }
  @keyframes drift1 { from { transform:translate(0,0) scale(1); } to { transform:translate(110px,70px) scale(1.1); } }
  @keyframes drift2 { from { transform:translate(0,0) scale(1.05); } to { transform:translate(-120px,-60px) scale(.94); } }
  @keyframes drift3 { from { transform:translate(0,0); } to { transform:translate(-80px,100px) scale(1.14); } }

  a { color:var(--accent); text-decoration:none; }
  ::selection { background:rgba(0,113,227,.18); }
  @keyframes rise { from { opacity:0; transform:translateY(10px); } to { opacity:1; transform:none; } }
  @keyframes pop { from { opacity:0; transform:translateY(4px) scale(.99); } to { opacity:1; transform:none; } }

  .mark {
    width:28px; height:28px; border-radius:8px; display:inline-flex;
    align-items:center; justify-content:center; flex:none;
    background:linear-gradient(180deg,#3b9bff,#0071e3);
    box-shadow:0 1px 2px rgba(0,0,0,.12), inset 0 1px 0 rgba(255,255,255,.35);
  }
  .mark.big { width:64px; height:64px; border-radius:17px; box-shadow:0 2px 6px rgba(0,60,150,.22), 0 14px 34px rgba(0,113,227,.35), inset 0 1px 0 rgba(255,255,255,.35); }

  /* ===== 布局 ===== */
  .layout { display:flex; min-height:100vh; }
  .sidebar {
    width:228px; flex:none; position:sticky; top:0; height:100vh;
    display:flex; flex-direction:column;
    background:rgba(255,255,255,.62); backdrop-filter:blur(24px) saturate(180%);
    border-right:1px solid var(--border);
    padding:16px 12px;
  }
  .side-brand {
    display:flex; align-items:center; gap:10px;
    padding:8px 10px; font-weight:700; font-size:16px; letter-spacing:-.2px;
  }
  .side-nav { display:flex; flex-direction:column; gap:2px; margin-top:20px; flex:1; }
  .side-sec { font-size:11px; color:var(--muted); letter-spacing:.8px; padding:6px 12px 6px; font-weight:600; }
  .side-item {
    display:flex; align-items:center; gap:10px;
    padding:9px 12px; border-radius:10px;
    color:var(--text); font-size:14px; transition:.15s;
  }
  .side-item svg { flex:none; color:var(--muted); transition:.15s; }
  .side-item:hover { background:rgba(0,0,0,.05); }
  .side-item.active { background:rgba(0,113,227,.12); color:var(--accent); font-weight:600; }
  .side-item.active svg { color:var(--accent); }

  .content-col { flex:1; min-width:0; display:flex; flex-direction:column; }
  .topbar {
    position:sticky; top:0; z-index:20; height:60px; flex:none;
    display:flex; align-items:center; gap:14px; padding:0 28px;
    background:rgba(245,245,247,.72); backdrop-filter:blur(24px) saturate(180%);
    border-bottom:1px solid var(--border);
  }
  .topbar-title { font-size:15px; font-weight:600; letter-spacing:-.1px; color:var(--text); }
  .topbar .spacer { flex:1; }

  .user-menu { position:relative; }
  .user-menu summary {
    list-style:none; cursor:pointer; user-select:none;
    display:flex; align-items:center; gap:9px;
    padding:5px 12px 5px 6px;
    background:#fff; border:1px solid var(--border); border-radius:999px;
    box-shadow:0 1px 2px rgba(0,0,0,.05); transition:.15s;
  }
  .user-menu summary::-webkit-details-marker { display:none; }
  .user-menu summary:hover { border-color:var(--border-strong); }
  .avatar {
    width:28px; height:28px; border-radius:50%;
    display:flex; align-items:center; justify-content:center;
    background:linear-gradient(180deg,#3b9bff,#0071e3);
    font-size:13px; font-weight:700; color:#fff;
  }
  .uname { font-size:13.5px; color:var(--text); font-weight:500; }
  .chev { color:var(--muted); transition:transform .2s; }
  details[open] .chev { transform:rotate(180deg); }
  .dropdown {
    position:absolute; right:0; top:calc(100% + 10px);
    min-width:190px; padding:6px;
    background:rgba(255,255,255,.92); backdrop-filter:blur(24px) saturate(180%);
    border:1px solid var(--border); border-radius:14px;
    box-shadow:var(--shadow-pop);
    animation:pop .16s ease both;
  }
  .drop-item {
    display:flex; align-items:center; gap:9px; width:100%;
    padding:9px 12px; border-radius:9px; border:0; background:transparent;
    font-size:13.5px; color:var(--text); text-align:left; cursor:pointer; transition:.12s;
  }
  .drop-item svg { color:var(--muted); }
  .drop-item:hover { background:rgba(0,0,0,.05); }
  .drop-item.danger, .drop-item.danger svg { color:var(--red); }
  .drop-sep { height:1px; background:var(--border); margin:5px 8px; }

  @media (max-width:768px) {
    .layout { flex-direction:column; }
    .sidebar {
      width:100%; height:auto; position:static;
      flex-direction:row; align-items:center; gap:6px;
      padding:10px 14px; border-right:0; border-bottom:1px solid var(--border);
    }
    .side-nav { flex-direction:row; margin-top:0; }
    .side-sec { display:none; }
  }

  /* ===== 内容 ===== */
  .container { max-width:920px; margin:0 auto; padding:40px 28px 72px; width:100%; }
  .page-head { margin-bottom:26px; }
  .page-head h2 { margin:0 0 6px; font-size:30px; font-weight:700; letter-spacing:-.6px; }
  .muted { color:var(--muted); font-size:13.5px; }

  .card {
    background:rgba(255,255,255,.78); backdrop-filter:blur(20px) saturate(180%);
    border:1px solid rgba(255,255,255,.7);
    outline:1px solid var(--border);
    border-radius:var(--radius);
    box-shadow:var(--shadow-card);
    padding:26px; animation:rise .4s ease both;
  }
  .panel-grid { display:grid; grid-template-columns:1.2fr 1fr; gap:16px; }
  @media (max-width:640px) { .panel-grid { grid-template-columns:1fr; } }
  .card-title { margin:0 0 10px; font-size:15px; font-weight:600; letter-spacing:-.1px; }
  .kv {
    display:flex; justify-content:space-between; align-items:center;
    padding:12px 0; border-bottom:1px solid var(--border); font-size:14px;
  }
  .kv:last-child { border-bottom:0; }
  .kv span { color:var(--muted); }
  .kv b { font-weight:600; font-variant-numeric:tabular-nums; letter-spacing:-.1px; }
  .action {
    display:block; width:100%; padding:11px 14px; margin-bottom:10px;
    border:1px solid var(--border); border-radius:12px;
    background:rgba(255,255,255,.8); color:var(--text);
    font-size:14px; text-align:left; cursor:pointer; transition:.15s;
  }
  .action:hover { background:#f5f5f7; border-color:var(--border-strong); }
  .action.danger { color:var(--red); }

  input, button { font:inherit; }
  input {
    width:100%; padding:12px 14px; margin:6px 0 16px;
    background:rgba(0,0,0,.035); border:1px solid transparent;
    border-radius:12px; color:var(--text); transition:.15s;
  }
  input::placeholder { color:#9a9aa0; }
  input:focus { outline:none; background:#fff; border-color:var(--accent); box-shadow:0 0 0 4px rgba(0,113,227,.14); }
  button.primary {
    width:100%; padding:12px; border:0; border-radius:980px; cursor:pointer;
    color:#fff; font-weight:600; letter-spacing:-.1px; font-size:15px;
    background:#0071e3; box-shadow:0 1px 3px rgba(0,113,227,.35);
    transition:.15s;
  }
  button.primary:hover { background:#0077ed; }
  button.primary:active { background:#006edb; transform:scale(.995); }

  .msg { padding:12px 14px; border-radius:12px; font-size:13.5px; margin-bottom:16px; }
  .msg.ok { background:rgba(47,179,68,.1); color:#1f7a31; border:1px solid rgba(47,179,68,.2); }
  .msg.err { background:rgba(255,59,48,.08); color:#c22a22; border:1px solid rgba(255,59,48,.18); }

  /* ===== 登录页（分屏）===== */
  .login-split { min-height:100vh; display:grid; grid-template-columns:1.15fr 1fr; }
  .login-left {
    position:relative; display:flex; align-items:center; justify-content:center;
    padding:56px; overflow:hidden; color:#fff;
    background:linear-gradient(160deg,#1d4ed8 0%, #3b82f6 42%, #22d3ee 100%);
  }
  .login-left::before {
    content:""; position:absolute; inset:0;
    background-image:radial-gradient(rgba(255,255,255,.14) 1px, transparent 1px);
    background-size:26px 26px; opacity:.45;
  }
  .login-left-inner { position:relative; z-index:1; max-width:400px; animation:rise .5s ease both; }
  .login-left h1 { font-size:36px; font-weight:700; letter-spacing:-.6px; margin:24px 0 6px; }
  .login-left .en { font-size:12.5px; letter-spacing:3.5px; text-transform:uppercase; opacity:.75; margin:0; }
  .login-left .tagline { margin:38px 0 6px; font-size:17px; font-weight:600; letter-spacing:.2px; }
  .login-left .tagline-sub { margin:0; font-size:13.5px; opacity:.8; letter-spacing:.5px; }
  .chart-deco { display:block; margin-top:44px; opacity:.85; }
  .login-right {
    display:flex; align-items:center; justify-content:center;
    padding:48px 36px;
    background:linear-gradient(180deg, rgba(255,255,255,.52) 0%, rgba(242,246,255,.3) 100%);
    backdrop-filter:blur(24px) saturate(180%);
  }
  .login-form-wrap { width:100%; max-width:360px; animation:rise .45s ease both; }
  .login-form-wrap h2 { font-size:28px; font-weight:700; letter-spacing:-.5px; margin:0 0 8px; }
  .login-mobile-brand { display:none; align-items:center; gap:9px; font-weight:700; font-size:16px; margin-bottom:28px; }
  .foot { margin-top:24px; font-size:12px; color:var(--muted); }
  @media (max-width:860px) {
    .login-split { grid-template-columns:1fr; }
    .login-left { display:none; }
    .login-mobile-brand { display:flex; }
  }