/* 登录页（决策记录 0032）：电脑上左右两栏，手机上上下排列。和运营端同一套配色。 */
:root {
  --ink: #111827; --ink-2: #4b5563; --ink-3: #8a93a3; --line: #e5e7ee;
  --primary: #4f46e5; --primary-dark: #4338ca; --bad: #be123c; --bad-soft: #fff1f2;
  --font: -apple-system, BlinkMacSystemFont, "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { font: 15px/1.6 var(--font); color: var(--ink); background: #f6f7fb; -webkit-font-smoothing: antialiased; }
.lg { display: grid; grid-template-columns: minmax(360px, 5fr) 7fr; min-height: 100vh; }

.lg-brand { position: relative; display: flex; flex-direction: column; justify-content: space-between; gap: 40px; padding: 40px 48px; color: #e0e7ff; background: #1e1b4b; overflow: hidden; }
.lg-brand::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px); background-size: 32px 32px; pointer-events: none; }
.lg-brand > * { position: relative; }
.lg-mark { display: flex; align-items: center; gap: 12px; }
.lg-mark b { display: block; color: #fff; font-size: 17px; font-weight: 600; letter-spacing: .2px; }
.lg-mark small { color: #a5b4fc; font-size: 12px; }
.lg-logo { width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; background: var(--primary); color: #fff; font-weight: 700; font-size: 18px; }
.lg-copy h1 { margin: 0 0 28px; color: #fff; font-size: 32px; line-height: 1.35; font-weight: 600; letter-spacing: .5px; }
.lg-copy ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.lg-copy li { display: flex; align-items: baseline; gap: 14px; font-size: 15px; color: #c7d2fe; }
.lg-copy li span { font: 600 12px/1 var(--font); color: #818cf8; letter-spacing: 1px; font-variant-numeric: tabular-nums; }
.lg-foot { margin: 0; font-size: 12px; color: #818cf8; }

.lg-panel { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 18px; padding: 40px 24px; }
.lg-form { width: 100%; max-width: 380px; }
.lg-form h2 { margin: 0 0 4px; font-size: 24px; font-weight: 600; }
.lg-sub { margin: 0 0 24px; color: var(--ink-3); font-size: 14px; }
.lg-alert { margin: 0 0 16px; padding: 10px 12px; border-radius: 8px; background: var(--bad-soft); color: var(--bad); font-size: 14px; }
.lg-field { display: block; margin-bottom: 16px; }
.lg-field span { display: block; margin-bottom: 6px; font-size: 13px; font-weight: 500; color: var(--ink-2); }
.lg-field input { display: block; width: 100%; height: 44px; padding: 0 12px; border: 1px solid #d9dde5; border-radius: 10px; background: #fff; color: var(--ink); font: 16px var(--font); transition: border-color .15s, box-shadow .15s; }
.lg-field input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 70, 229, .15); }
.lg-submit { width: 100%; height: 44px; margin-top: 8px; border: 0; border-radius: 10px; background: var(--primary); color: #fff; font: 600 15px var(--font); cursor: pointer; transition: background .15s; }
.lg-submit:hover { background: var(--primary-dark); }
.lg-help { margin: 14px 0 0; text-align: center; font-size: 13px; color: var(--ink-3); }
.lg-demo { width: 100%; max-width: 380px; padding: 12px 14px; border: 1px dashed #d9dde5; border-radius: 10px; font-size: 13px; color: var(--ink-2); background: #fff; }
.lg-demo summary { cursor: pointer; font-weight: 500; }
.lg-demo p { margin: 8px 0 0; }

@media (max-width: 860px) {
  .lg { grid-template-columns: 1fr; }
  .lg-brand { padding: 22px 20px; gap: 16px; }
  .lg-copy h1 { font-size: 22px; margin-bottom: 0; }
  .lg-copy h1 br { display: none; }
  .lg-copy ul, .lg-foot { display: none; }
  .lg-panel { justify-content: flex-start; padding: 28px 20px 40px; }
}