:root {
  color-scheme: light;
  --yuqi-canvas: #f5f7f8;
  --yuqi-surface: #ffffff;
  --yuqi-surface-muted: #f8fafb;
  --yuqi-surface-selected: #eaf4f3;
  --yuqi-ink: #1b2732;
  --yuqi-muted: #607080;
  --yuqi-dim: #7b8996;
  --yuqi-line: #d9e0e5;
  --yuqi-line-strong: #bfcad2;
  --yuqi-signal: #256f69;
  --yuqi-signal-strong: #1e5e59;
  --yuqi-signal-soft: #eaf4f3;
  --yuqi-warm: #9a6b20;
  --yuqi-danger: #b54853;
  --yuqi-danger-soft: #fbebed;
  --yuqi-shadow: 0 16px 36px rgba(27, 39, 50, .07);
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--yuqi-canvas);
  color: var(--yuqi-ink);
  font-family: "PingFang SC", "SF Pro Display", "SF Pro Text", "Microsoft YaHei", system-ui, sans-serif;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; }
::selection { color: var(--yuqi-surface); background: var(--yuqi-signal); }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 2px solid var(--yuqi-signal); outline-offset: 3px; }
.eyebrow { margin: 0; color: var(--yuqi-signal); font-size: 11px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.native-loading { display: grid; min-height: 100vh; place-items: center; color: var(--yuqi-muted); background: var(--yuqi-canvas); }

.login-page { min-height: 100vh; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(360px, .8fr); padding: clamp(24px, 6vw, 88px); gap: clamp(40px, 10vw, 150px); align-items: center; background: var(--yuqi-canvas); }
.login-art p, .eyebrow { color: var(--yuqi-signal); font-weight: 800; letter-spacing: .13em; }
.login-art h1 { max-width: 620px; margin: 18px 0; font-size: clamp(38px, 5vw, 74px); letter-spacing: -.05em; line-height: 1.05; }
.login-art small { color: var(--yuqi-muted); font-size: 16px; }
.brand-mark { display: grid; width: 52px; height: 52px; place-items: center; border: 1px solid var(--yuqi-line-strong); border-radius: 14px; background: var(--yuqi-signal-soft); color: var(--yuqi-signal-strong); font-size: 28px; font-weight: 900; }
.login-card { display: grid; gap: 18px; padding: 36px; border: 1px solid var(--yuqi-line); border-radius: 18px; background: var(--yuqi-surface); box-shadow: var(--yuqi-shadow); }
.login-card h2 { margin: 0 0 10px; }
.login-card label { display: grid; gap: 8px; color: var(--yuqi-muted); }
.login-card input { padding: 12px; border: 1px solid var(--yuqi-line-strong); border-radius: 10px; background: var(--yuqi-surface); color: var(--yuqi-ink); }
.login-card button { border: 1px solid var(--yuqi-signal); border-radius: 10px; padding: 13px; background: var(--yuqi-signal); color: var(--yuqi-surface); font-weight: 800; }
.form-message[data-kind="error"] { color: var(--yuqi-danger); }

@media (max-width: 760px) { .login-page { grid-template-columns: 1fr; padding: 32px 20px; gap: 44px; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}