*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  font-family: "Microsoft YaHei", Helvetica, Arial, sans-serif;
  background: #ffffff;
  color: #2d3277;
}

.page {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

.login-shell {
  width: 100%;
  max-width: 400px;
 
  overflow: hidden;
}

.brand {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

.brand-image {
  display: block;
  width: min(220px, 58vw);
  height: auto;
  margin: 0 auto;
}

.login-card {
  background: #ffffff;
  border-radius: 15px;
  padding: 3px 26px 10px
}

.login-title {
  margin: 0 0 8px;
  font-size: 1.75rem;
  font-weight: 800;
  color: #2d3277;
}

.login-subtitle {
  margin: 0 0 2px;
  font-size: 0.95rem;
  color: #2d3277;
  opacity: 0.85;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.field-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: #2d3277;
}

.field-input {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid #d1c4e9;
  border-radius: 10px;
  font-size: 1rem;
  color: #2d3277;
  background: #fff;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field-input::placeholder {
  color: #a9a9a9;
}

.field-input:focus {
  border-color: #2d3277;
  box-shadow: 0 0 0 3px rgba(45, 50, 119, 0.12);
}

.login-button {
  margin-top: 14px;
  width: 100%;
  padding: 14px 24px;
  border: none;
  border-radius: 50px;
  background: #ffe600;
  color: #2d3277;
  font-size: 1.05rem;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.login-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(45, 50, 119, 0.15);
}

.login-button:active {
  transform: translateY(0);
}

@media (max-width: 480px) {
  .page {
    padding: 16px 12px;
  }

  .login-shell {
    max-width: none;
    padding: 24px 16px 20px;

    
  }

  .brand-image {
    width: min(190px, 52vw);
  }

  .login-card {
    padding: 24px 18px 28px;
    border-radius: 12px;
  }

  .login-title {
    font-size: 1.5rem;
  }

  .login-subtitle {
    font-size: 0.9rem;
    margin-bottom: 2px;
  }

  .field-input,
  .login-button {
    font-size: 16px;
  }
}

@media (min-width: 768px) {
  .login-shell {
    padding: 32px 24px 28px;
  }

  .login-card {
    padding: 5px 26px 10px;
  }
}