:root {
  --brand: #0033a0;
  --brand-bright: #004bc8;
  --ink: #101c31;
  --muted: #6c7890;
  --line: #ccd6e5;
  --page: #ffffff;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--page);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

button, input { font: inherit; }
.loginShell { min-height: 100vh; display: grid; grid-template-columns: 84px minmax(0, 1fr); }

.loginRail {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  color: rgba(255,255,255,.76);
  background: linear-gradient(180deg, #0844bb 0%, #0033a0 58%, #072a75 100%);
  border-right: 1px solid rgba(255,255,255,.45);
}

.railTitle, .railCopyright {
  position: absolute;
  left: 50%;
  writing-mode: vertical-rl;
  transform: translateX(-50%);
  font-weight: 500;
}

.railTitle { top: 76px; font-size: 17px; letter-spacing: .08em; }
.railRule { position: absolute; left: 50%; top: 250px; bottom: 340px; width: 1px; background: rgba(255,255,255,.55); }
.railCopyright { bottom: 72px; font-size: 13px; letter-spacing: .03em; }
.loginWorkspace { min-width: 0; min-height: 100vh; display: grid; grid-template-rows: 150px minmax(0, 1fr); }

.loginBrandBar {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0 clamp(48px, 14vw, 210px);
  color: #fff;
  background: linear-gradient(115deg, #0033a0 0%, #0047c6 50%, #0033a0 100%);
  box-shadow: 0 16px 34px rgba(0,51,160,.13);
}

.loginBrandBar > img { width: 214px; height: 62px; object-fit: contain; }
.brandDivider { width: 1px; height: 66px; background: rgba(255,255,255,.78); }
.loginBrandBar > div { display: grid; gap: 5px; }
.loginBrandBar strong { font-size: 28px; line-height: 1.1; font-weight: 900; }
.loginBrandBar small { color: rgba(255,255,255,.76); font-size: 16px; font-weight: 400; }
.loginMain { display: grid; place-items: start center; padding: 88px 48px 64px; background: #fff; }
.loginForm { width: min(720px, 100%); }
.loginIntro { padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.loginIntro > span { color: var(--brand); font-size: 16px; font-weight: 850; }
.loginIntro h1 { margin: 24px 0 10px; font-size: 58px; line-height: 1; font-weight: 850; }
.loginIntro p { margin: 0; color: var(--muted); font-size: 20px; }

.loginError {
  margin: 24px 0 -4px;
  padding: 13px 15px;
  color: #a20f1d;
  background: #fff1f2;
  border: 1px solid #ffc9cf;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
}

.loginField { display: grid; gap: 10px; margin-top: 28px; color: var(--muted); font-size: 16px; font-weight: 600; }

.loginInput {
  min-height: 70px;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 0 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 5px;
  transition: border-color .16s ease, box-shadow .16s ease;
}

.loginInput:focus-within { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(0,51,160,.12); }
.loginInput > img, .passwordToggle img { width: 26px; height: 26px; opacity: .64; }
.loginInput input { min-width: 0; height: 68px; padding: 0; color: var(--ink); background: transparent; border: 0; outline: 0; font-size: 21px; }
.passwordToggle { width: 42px; height: 42px; display: grid; place-items: center; padding: 0; background: transparent; border: 0; cursor: pointer; }
.loginRemember { display: inline-flex; align-items: center; gap: 12px; margin: 24px 0 26px; color: #27364f; font-size: 17px; font-weight: 700; }
.loginRemember input { width: 20px; height: 20px; margin: 0; accent-color: var(--brand); }

.loginSubmit {
  width: 100%;
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 24px 0 28px;
  color: #fff;
  background: linear-gradient(100deg, #0033a0 0%, #064abc 54%, #0033a0 100%);
  border: 1px solid #0033a0;
  border-radius: 5px;
  box-shadow: 0 10px 25px rgba(0,51,160,.18);
  cursor: pointer;
}

.loginSubmit:hover { background: #002b88; }
.submitLabel { display: inline-flex; align-items: center; gap: 13px; font-size: 19px; font-weight: 850; }
.submitLabel > img { width: 25px; height: 25px; filter: brightness(0) invert(1); }
.submitArrow { width: 54px; height: 54px; display: grid; place-items: center; background: #fff; border-radius: 5px; box-shadow: 0 3px 9px rgba(0,0,0,.15); }
.submitArrow img { width: 27px; height: 27px; filter: invert(17%) sepia(96%) saturate(3804%) hue-rotate(219deg) brightness(78%); }
.loginSecurity { display: flex; align-items: center; gap: 11px; margin-top: 30px; color: var(--muted); font-size: 14px; }
.loginSecurity img { width: 23px; height: 23px; opacity: .65; }

@media (max-width: 900px) {
  .loginShell { grid-template-columns: 44px minmax(0,1fr); }
  .loginRail { min-height: 100%; }
  .railTitle { top: 36px; font-size: 11px; }
  .railRule, .railCopyright { display: none; }
  .loginWorkspace { grid-template-rows: auto minmax(0,1fr); }
  .loginBrandBar { min-height: 112px; gap: 15px; padding: 22px 28px; }
  .loginBrandBar > img { width: 130px; height: 44px; }
  .brandDivider { height: 45px; }
  .loginBrandBar strong { font-size: 20px; }
  .loginBrandBar small { font-size: 11px; }
  .loginMain { padding: 50px 24px; }
  .loginIntro h1 { font-size: 44px; }
}

@media (max-width: 560px) {
  .loginShell { display: block; }
  .loginRail { display: none; }
  .loginBrandBar { justify-content: center; text-align: left; }
  .loginBrandBar > img { width: 108px; }
  .loginBrandBar strong { font-size: 17px; }
  .loginMain { padding: 36px 18px; }
  .loginIntro h1 { margin-top: 16px; font-size: 36px; }
  .loginIntro p { font-size: 16px; }
  .loginInput { min-height: 58px; }
  .loginInput input { height: 56px; font-size: 17px; }
  .loginSubmit { min-height: 64px; }
  .submitArrow { width: 44px; height: 44px; }
}