/* ==========================================================================
   华仁科技工业历史资料库 · 登录页
   ========================================================================== */

.login-page {
  margin: 0;
  background: var(--bg);
  min-height: 100vh;
}

.login-shell {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  min-height: 100vh;
}

/* ---------------------------------------------------------------- 左侧品牌区 */

.login-brand {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 15% 0%, rgba(180, 80, 30, .28) 0%, rgba(180, 80, 30, 0) 55%),
    linear-gradient(150deg, #16222D 0%, var(--ink) 45%, #0B1116 100%);
  color: rgba(255, 255, 255, .68);
  padding: 56px clamp(32px, 5vw, 72px);
  display: flex;
  align-items: center;
}

.login-brand::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .055) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(80% 75% at 30% 35%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(80% 75% at 30% 35%, #000 30%, transparent 100%);
}

.login-brand::after {
  content: '';
  position: absolute;
  right: -120px;
  bottom: -160px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  border: 1px solid rgba(180, 80, 30, .35);
  box-shadow:
    0 0 0 40px rgba(180, 80, 30, .07),
    0 0 0 90px rgba(180, 80, 30, .045);
}

.login-brand-inner {
  position: relative;
  z-index: 1;
  max-width: 520px;
}

.login-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: clamp(48px, 9vh, 96px);
}

.login-logo .brand-mark {
  width: 42px;
  height: 42px;
  font-size: 13px;
  background: rgba(255, 255, 255, .08);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .16);
}

.login-logo-txt {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.login-logo-txt b {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .04em;
}

.login-logo-txt small {
  font-size: 10px;
  letter-spacing: .2em;
  color: rgba(255, 255, 255, .42);
}

.login-brand h1 {
  margin: 0 0 20px;
  color: #fff;
  font-size: clamp(38px, 4.4vw, 58px);
  line-height: 1.16;
  letter-spacing: .02em;
  font-weight: 600;
}

.login-brand h1 em {
  font-style: normal;
  color: #E9A472;
}

.login-lead {
  max-width: 430px;
  margin: 0 0 34px;
  font-size: 14px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .58);
}

.login-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 0 0 clamp(44px, 8vh, 84px);
  padding: 0;
  list-style: none;
}

.login-points li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .56);
}

.login-points i {
  width: 5px;
  height: 5px;
  flex: none;
  background: var(--rust);
  transform: rotate(45deg);
}

.login-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, .1);
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .34);
}

/* ---------------------------------------------------------------- 右侧表单区 */

.login-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 48px clamp(24px, 5vw, 72px);
  background: var(--paper);
  border-left: 1px solid var(--line);
}

.login-card {
  width: 100%;
  max-width: 372px;
}

.login-kicker {
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--rust);
  margin-bottom: 14px;
}

.login-card h2 {
  margin: 0 0 10px;
  font-size: 26px;
  letter-spacing: .02em;
}

.login-desc {
  margin: 0 0 30px;
  font-size: 13px;
  line-height: 1.85;
  color: var(--muted);
}

.login-field {
  display: block;
  margin-bottom: 18px;
}

.login-field > span {
  display: block;
  margin-bottom: 7px;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--ink-3);
}

.login-field input {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--paper-2);
  font: inherit;
  font-size: 14px;
  color: var(--ink);
  transition: border-color .18s, box-shadow .18s, background .18s;
  appearance: none;
}

.login-field input::placeholder { color: var(--muted-2); }

.login-field input:hover { border-color: #D3DAE1; }

.login-field input:focus {
  outline: none;
  background: var(--paper);
  border-color: var(--steel);
  box-shadow: 0 0 0 3px rgba(31, 108, 130, .12);
}

.login-error {
  margin: -4px 0 16px;
  padding: 9px 12px;
  border: 1px solid var(--rust-line);
  border-left: 3px solid var(--rust);
  border-radius: var(--r-sm);
  background: var(--rust-soft);
  color: var(--rust);
  font-size: 12.5px;
  line-height: 1.6;
}

.login-submit {
  width: 100%;
  height: 46px;
  margin-top: 6px;
  border: 0;
  border-radius: var(--r-sm);
  background: var(--ink-2);
  color: #fff;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: .22em;
  cursor: pointer;
  transition: background .18s, transform .18s, box-shadow .18s;
  box-shadow: 0 1px 2px rgba(16, 24, 32, .14);
}

.login-submit:hover {
  background: var(--rust);
  box-shadow: 0 6px 18px rgba(180, 80, 30, .22);
}

.login-submit:active { transform: translateY(1px); }

.login-submit:disabled {
  background: var(--muted-2);
  cursor: progress;
  box-shadow: none;
}

.login-tip {
  margin: 18px 0 0;
  font-size: 11.5px;
  line-height: 1.75;
  color: var(--muted-2);
}

.login-foot {
  position: absolute;
  bottom: 26px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 16px;
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: .08em;
  color: var(--muted-2);
}

.login-beian { color: var(--muted-2); }

/* ---------------------------------------------------------------- 响应式 */

@media (max-width: 900px) {
  .login-shell { grid-template-columns: 1fr; }
  .login-brand { padding: 44px 26px 34px; align-items: flex-start; }
  .login-logo { margin-bottom: 30px; }
  .login-brand h1 { font-size: 34px; margin-bottom: 14px; }
  .login-lead { margin-bottom: 22px; font-size: 13px; }
  .login-points { margin-bottom: 0; gap: 8px 16px; }
  .login-meta { display: none; }
  .login-panel { position: relative; border-left: 0; border-top: 1px solid var(--line); min-height: 480px; padding-bottom: 96px; }
}