:root {
  --bg: #f8fafc;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --primary: #1f5eff;
  --primary-hover: #1548d1;
  --danger: #ef4444;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background-color: #ffffff;
}

/* --- 核心：左右分屏布局 --- */
.login-container {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* --- 左侧大图区 --- */
.login-left-banner {
  flex: 1;
  position: relative;
  background-image: url('/static/photo.jpg'); 
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.8) 0%, rgba(15, 23, 42, 0.4) 100%);
  display: flex;
  align-items: flex-end;
  padding: 60px;
}

.banner-content {
  max-width: 500px;
  color: #ffffff;
}

.banner-content .eyebrow {
  margin: 0 0 16px;
  color: #60a5fa;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.banner-content h1 {
  margin: 0 0 16px;
  font-size: 40px;
  line-height: 1.2;
  font-weight: 700;
}

.banner-content p {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.8);
}

/* --- 右侧表单区 --- */
.login-right-form {
  flex: 0 0 520px;
  display: flex;
  flex-direction: column;
  align-items: center;      /* 水平居中 */
  padding-top: 12vh;        /* 距离顶部留出约 12% 的高度，实现“中上”效果 */
  position: relative;
  background-color: #ffffff;
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.05);
  z-index: 10;
}

/* Logo 区域 */
.brand-logo-wrap {
  display: flex;
  align-items: center;
  gap: 16px;                /* Logo和文字的间距放大 */
  margin-bottom: 8vh;       /* 和下方登录框拉开距离 */
}

.brand-logo {
  width: 68px;              /* 放大 Logo */
  height: 68px;
  border-radius: 12px;
  object-fit: contain;
}

.brand-name {
  font-size: 32px;          /* 放大文字 */
  font-weight: 800;
  color: #0f172a;
  letter-spacing: 4px;
}

/* 表单容器 */
.login-shell {
  width: 100%;
  max-width: 400px;
  padding: 0 40px;
}

.login-copy {
  margin-bottom: 32px;
}

.login-copy h2 {
  margin: 0 0 8px;
  font-size: 28px;
  font-weight: 700;
  color: var(--ink);
}

.login-desc {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.login-form {
  display: grid;
  gap: 20px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
}

.field input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  outline: none;
  transition: all 0.2s ease;
}

.field input::placeholder {
  color: #94a3b8;
}

.field input:focus {
  border-color: var(--primary);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(31, 94, 255, 0.15);
}

.submit-btn {
  margin-top: 8px;
  padding: 14px 18px;
  border: 0;
  border-radius: 8px;
  background: var(--primary);
  color: white;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(31, 94, 255, 0.2);
}

.submit-btn:hover {
  background: var(--primary-hover);
  box-shadow: 0 6px 16px rgba(31, 94, 255, 0.3);
  transform: translateY(-1px);
}

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

.login-error {
  margin-bottom: 20px;
  padding: 12px 16px;
  border-radius: 8px;
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  font-size: 14px;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* 右下角版权信息 */
.login-footer {
  position: absolute;
  bottom: 30px;
  width: 100%;
  text-align: center;
  font-size: 12px;
  color: #94a3b8;
}

/* --- 响应式：当屏幕宽度小于 1024px 时，隐藏左侧大图 --- */
@media (max-width: 1024px) {
  .login-left-banner {
    display: none;
  }
  
  .login-right-form {
    flex: 1;
    padding-top: 40px;
    background: radial-gradient(circle at 20% 20%, rgba(31, 94, 255, 0.05), transparent 50%), var(--bg);
    box-shadow: none;
  }
  
  .brand-logo-wrap {
    margin-bottom: 40px;
  }

  .login-shell {
    padding: 40px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 20px 40px -12px rgba(15, 23, 42, 0.08);
    border: 1px solid var(--line);
    margin: 0 20px 40px 20px; 
  }

  .login-footer {
    position: relative;
    bottom: 0;
    margin-bottom: 20px;
  }
}