/* 登录首屏视觉重构：只覆盖认证页面，不改变业务页面和登录逻辑。 */
:root {
  --auth-bg: #f4f7fb;
  --auth-ink: #172033;
  --auth-muted: #738097;
  --auth-line: #e5eaf2;
  --auth-primary: #2563eb;
  --auth-primary-dark: #1d4ed8;
}

body:has(#authScreen) { background: var(--auth-bg) !important; color: var(--auth-ink) !important; }
body:has(#authScreen)::before, body:has(#authScreen)::after,
body:has(#authScreen) .bg-orb { display: none !important; }
.auth-wrapper { min-height: 100vh; padding: 24px 22px 28px !important; align-items: flex-start !important; }
.auth-container { max-width: 480px !important; }
.auth-brand { color: var(--auth-ink) !important; text-shadow: none !important; margin-bottom: 14px !important; }
.auth-brand-icon { width: 56px !important; height: 56px !important; margin-bottom: 10px !important; border-radius: 16px !important; background: linear-gradient(145deg,#3b82f6,#1d4ed8) !important; border: 0 !important; box-shadow: 0 10px 22px rgba(37,99,235,.22) !important; animation: none !important; }
.auth-brand-icon i { color: #fff !important; font-size: 1.4em !important; }
.auth-eyebrow { display: block; margin-bottom: 6px; color: var(--auth-primary); font-size: 10px; letter-spacing: .16em; font-weight: 800; }
.auth-brand h1 { color: var(--auth-ink) !important; font-size: 26px !important; letter-spacing: -.02em !important; text-shadow: none !important; margin-bottom: 4px !important; }
.auth-brand p { color: var(--auth-muted) !important; opacity: 1 !important; font-size: 14px !important; font-weight: 500 !important; }
.auth-card { padding: 22px 26px !important; background: #fff !important; border: 1px solid var(--auth-line) !important; border-radius: 20px !important; box-shadow: 0 18px 45px rgba(31,55,90,.09) !important; }
.auth-card::before { height: 3px !important; background: var(--auth-primary) !important; animation: none !important; }
.auth-tabs { margin-bottom: 24px !important; padding: 4px !important; background: #f3f6fa !important; border: 1px solid #edf0f5 !important; box-shadow: none !important; border-radius: 12px !important; }
.auth-tab { color: #7d899c !important; padding: 11px 0 !important; border-radius: 9px !important; font-size: 14px !important; }
.auth-tab.active { color: #fff !important; background: var(--auth-primary) !important; box-shadow: 0 7px 16px rgba(37,99,235,.2) !important; }
.form-group { margin-bottom: 12px !important; }
.form-group label { color: #344158 !important; text-shadow: none !important; font-size: 13px !important; margin-bottom: 7px !important; }
.form-group label > i { color: var(--auth-primary); margin-right: 4px; }
.input-icon-wrap i { color: #9aa6b8 !important; }
.input-icon-wrap:focus-within i { color: var(--auth-primary) !important; }
.form-input { color: var(--auth-ink) !important; background: #f8fafc !important; border: 1px solid #dce3ed !important; border-radius: 11px !important; padding: 13px 16px 13px 44px !important; box-shadow: none !important; }
.form-input::placeholder { color: #a4afbf !important; }
.form-input:focus { border-color: #76a5f7 !important; background: #fff !important; box-shadow: 0 0 0 4px rgba(37,99,235,.1) !important; }
.btn-primary { min-height: 48px !important; padding: 13px 20px !important; background: var(--auth-primary) !important; color: #fff !important; border-radius: 11px !important; box-shadow: 0 9px 18px rgba(37,99,235,.2) !important; }
.btn-primary:hover { background: var(--auth-primary-dark) !important; transform: translateY(-1px) !important; box-shadow: 0 12px 24px rgba(37,99,235,.25) !important; }
.auth-trust-strip { display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; margin-top: 16px; padding-top: 13px; border-top: 1px solid #edf0f4; }
.auth-trust-strip span { display: flex; flex-direction: column; gap: 2px; min-width: 0; text-align: center; }
.auth-trust-strip i { color: var(--auth-primary); font-size: 15px; margin-bottom: 2px; }
.auth-trust-strip b { color: #46536a; font-size: 11px; font-weight: 700; }
.auth-trust-strip small { color: #9aa6b8; font-size: 10px; white-space: nowrap; transform: scale(.92); }
.auth-footer { margin-top: 18px !important; color: #9aa6b8 !important; text-shadow: none !important; font-size: 12px !important; }
.auth-footer-links { display: flex; justify-content: center; gap: 8px; margin-top: 5px; }
.auth-footer a { color: #71809a !important; }
.auth-footer a:hover { color: var(--auth-primary) !important; }
@media (max-width: 520px) {
  .auth-wrapper { padding: 28px 16px 26px !important; align-items: flex-start; }
  .auth-brand { margin-bottom: 16px !important; }
  .auth-brand-icon { width: 56px !important; height: 56px !important; }
  .auth-brand h1 { font-size: 24px !important; }
  .auth-card { padding: 22px 18px !important; border-radius: 17px !important; }
  .auth-trust-strip small { font-size: 9px; }
}