html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
}

/*
 * 全站 sticky footer（不用中间列 flex:1 / 不用 grid 1fr，避免多页主内容被算进「可压缩区」叠到页脚下）。
 * 短页：页脚 margin-top:auto 吃掉壳内剩余空间，贴视口底；长页：页脚跟在内容后正常滚动。
 */
.site-shell {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.site-shell > header {
  flex-shrink: 0;
}

.site-shell > .container.site-main {
  flex: 0 1 auto;
  width: 100%;
  max-width: 100%;
}

.site-shell > .container.site-main > main {
  padding-bottom: clamp(2rem, 6vh, 4rem);
}

.site-shell > footer.site-footer,
footer.site-footer.footer {
  flex-shrink: 0;
  margin-top: auto;
  position: static !important;
  bottom: auto !important;
  top: auto !important;
  left: auto !important;
  right: auto !important;
  inset: auto !important;
  transform: none !important;
  width: 100%;
  box-sizing: border-box;
}

/* 登录 / 注册 / 忘记密码：PC 保持原样 */
.account-auth .account-captcha-input {
  max-width: 9rem;
}

@media (max-width: 767.98px) {
  .site-shell > .container.site-main:has(.account-auth) {
    padding-left: 0;
    padding-right: 0;
    max-width: 100%;
  }

  .site-shell > .container.site-main:has(.account-auth) > main {
    padding-top: 0.5rem;
    padding-bottom: 2rem;
  }

  .site-shell > .container.site-main:has(.account-auth) > main > .alert {
    margin-left: 1.25rem;
    margin-right: 1.25rem;
    font-size: 1rem;
  }

  /* 认证页单独放大基准字号（全站手机端默认 14px 会显小） */
  .account-auth {
    margin: 0;
    padding: 1rem 0 0;
    padding-left: env(safe-area-inset-left, 0);
    padding-right: env(safe-area-inset-right, 0);
    font-size: 1.0625rem;
    background: #f5f7fa;
  }

  .account-auth > [class*="col-"] {
    max-width: none;
    width: 100%;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .account-auth-header {
    text-align: left;
    margin-bottom: 1.5rem !important;
    padding-top: 0.25rem;
  }

  .account-auth-header .h4 {
    font-size: 1.625rem;
    font-weight: 600;
    color: #1a2b42;
    margin-bottom: 0.625rem !important;
  }

  .account-auth-desc {
    font-size: 1rem;
    line-height: 1.6;
    color: #5c6b7a !important;
    max-width: none;
  }

  .account-auth .account-auth-card {
    border: none;
    border-radius: 0.875rem;
    box-shadow: 0 2px 12px rgba(30, 73, 118, 0.08) !important;
    overflow: hidden;
  }

  .account-auth .account-auth-card .card-body {
    padding: 1.5rem 1.375rem 1.625rem;
  }

  .account-auth .mb-3 {
    margin-bottom: 1.25rem !important;
  }

  .account-auth .form-label {
    font-size: 1.0625rem;
    font-weight: 500;
    color: #1f2937;
    margin-bottom: 0.5rem;
  }

  .account-auth .form-control {
    min-height: 3.25rem;
    padding: 0.625rem 1rem;
    font-size: 1.0625rem;
    border-radius: 0.625rem;
    border-color: #d4dde8;
    background-color: #fff;
  }

  .account-auth .form-control:focus {
    background-color: #fff;
    border-color: #258cfb;
  }

  .account-auth .account-captcha {
    display: grid !important;
    grid-template-columns: minmax(9.5rem, 44%) 1fr;
    align-items: stretch;
    gap: 0.75rem;
    padding: 0.875rem;
    background: #f0f4f9;
    border: 1px solid #e2e8f0;
    border-radius: 0.75rem;
  }

  .account-auth .account-captcha-img {
    width: 100% !important;
    height: 100% !important;
    min-height: 3rem;
    max-height: none;
    object-fit: contain;
    border-radius: 0.375rem;
    cursor: pointer;
  }

  .account-auth .account-captcha-input {
    max-width: none;
    width: 100%;
    min-width: 0;
    min-height: 3.25rem;
    padding: 0.625rem 0.875rem;
    font-size: 1.0625rem;
    letter-spacing: 0.06em;
  }

  .account-auth .form-text {
    font-size: 0.9375rem;
    color: #6b7280;
    margin-top: 0.5rem;
  }

  .account-auth .account-auth-card .btn-primary {
    min-height: 3.25rem;
    margin-top: 0.5rem;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 0.75rem;
    font-size: 1.125rem;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(37, 140, 251, 0.3);
  }

  .account-auth .account-auth-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-top: 1.5rem !important;
    font-size: 1rem;
    text-align: center;
  }

  .account-auth .account-auth-links > a {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 3rem;
    padding: 0.625rem 1rem;
    border: 1px solid #d4dde8;
    border-radius: 0.625rem;
    background: #fff;
    color: #1f2937 !important;
    text-decoration: none;
    font-size: 1rem;
  }

  .account-auth .account-auth-links--single {
    display: block;
    text-align: center;
    font-size: 1.0625rem;
  }

  .account-auth .account-auth-links--single > a {
    display: inline;
    min-height: 0;
    padding: 0;
    border: none;
    background: transparent;
    box-shadow: none;
    color: var(--bs-link-color) !important;
    font-size: 1.0625rem;
    font-weight: 500;
  }

  .account-auth .text-danger.small {
    font-size: 0.9375rem;
  }
}