:root {
  --bg-ink: #061119;
  --bg-panel: rgba(8, 18, 28, 0.78);
  --panel-line: rgba(152, 227, 255, 0.18);
  --text-main: #eef8ff;
  --text-soft: rgba(238, 248, 255, 0.74);
  --text-mute: rgba(238, 248, 255, 0.48);
  --accent-cyan: #5fe7ff;
  --accent-blue: #4f7cff;
  --accent-lime: #8cff72;
  --accent-gold: #ffc65c;
  --danger: #ff7c8a;
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --shadow-panel: 0 32px 90px rgba(0, 0, 0, 0.44);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans SC", sans-serif;
  background: var(--bg-ink);
  color: var(--text-main);
}

button,
input {
  font: inherit;
}

.ops-login-shell {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  isolation: isolate;
}

.ops-login-backdrop {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 18% 20%, rgba(79, 124, 255, 0.28), transparent 28%),
    radial-gradient(circle at 78% 22%, rgba(95, 231, 255, 0.18), transparent 24%),
    radial-gradient(circle at 66% 78%, rgba(140, 255, 114, 0.14), transparent 24%),
    linear-gradient(135deg, #07111b 0%, #081723 46%, #041018 100%);
}

.ops-login-layout {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(320px, 1.1fr) minmax(320px, 460px);
  gap: 28px;
  align-items: center;
  padding: 32px clamp(20px, 4vw, 60px);
}

.ops-login-copy,
.ops-login-panel {
  border: 1px solid var(--panel-line);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(11, 23, 34, 0.86), rgba(5, 15, 24, 0.74));
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-panel);
}

.ops-login-copy {
  padding: clamp(28px, 4vw, 44px);
}

.eyebrow,
.panel-badge {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.eyebrow {
  color: var(--accent-cyan);
}

.ops-login-copy h1,
.ops-login-panel h2 {
  margin: 0;
  line-height: 1.06;
}

.ops-login-copy h1 {
  font-size: clamp(40px, 5vw, 68px);
  max-width: 9ch;
}

.lead {
  max-width: 42ch;
  margin: 22px 0 0;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-soft);
}

.lead strong {
  color: var(--accent-gold);
}

.feature-list {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

.feature-card {
  display: grid;
  gap: 10px;
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.03);
}

.feature-card span {
  color: var(--accent-gold);
  font-size: 12px;
  letter-spacing: 0.24em;
}

.feature-card strong {
  font-size: 22px;
}

.feature-card p,
.ops-login-panel p,
.form-hint {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.7;
}

.ops-login-panel {
  padding: 28px;
}

.panel-top p {
  color: var(--text-soft);
}

.panel-badge {
  color: var(--accent-lime);
}

.ops-login-panel h2 {
  font-size: 34px;
}

.ops-login-form {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.field {
  display: grid;
  gap: 10px;
}

.field span {
  font-size: 14px;
  font-weight: 700;
}

.field input {
  width: 100%;
  padding: 15px 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  outline: none;
  transition: border-color 180ms ease, transform 180ms ease;
}

.field input:focus {
  border-color: rgba(95, 231, 255, 0.48);
  transform: translateY(-1px);
}

.field input::placeholder {
  color: var(--text-mute);
}

.captcha-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 144px;
  gap: 12px;
  align-items: stretch;
}

.captcha-box {
  display: grid;
  place-items: center;
  gap: 4px;
  padding: 6px;
  border: 1px solid rgba(95, 231, 255, 0.2);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(95, 231, 255, 0.14), rgba(79, 124, 255, 0.08));
  color: var(--text-soft);
  cursor: pointer;
}

.captcha-box canvas {
  width: 100%;
  max-width: 144px;
  height: auto;
  border-radius: 10px;
}

.captcha-box small {
  font-size: 11px;
}

.login-button {
  min-height: 54px;
  border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
  color: #041019;
  font-weight: 800;
  cursor: pointer;
  transition: transform 180ms ease, filter 180ms ease;
}

.login-button:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

.form-hint {
  font-size: 13px;
}

.form-hint.is-error {
  color: var(--danger);
}

.form-hint.is-success {
  color: var(--accent-lime);
}

@media (max-width: 980px) {
  .ops-login-layout {
    grid-template-columns: 1fr;
  }

  .ops-login-copy h1 {
    max-width: none;
  }
}

@media (max-width: 640px) {
  .ops-login-layout {
    padding: 16px;
  }

  .ops-login-copy,
  .ops-login-panel {
    padding: 22px;
    border-radius: 24px;
  }

  .captcha-row {
    grid-template-columns: 1fr;
  }
}