.error-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  background: radial-gradient(circle at 20% 18%, rgba(255, 255, 255, 0.82), transparent 28%), radial-gradient(circle at 82% 72%, rgba(69, 74, 82, 0.05), transparent 30%), var(--bg-color);
}
.error-page {
  display: flex;
  width: min(520px, 100%);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 44px 32px;
  border: 1px solid rgba(255, 255, 255, 0.86);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.64);
  box-shadow: 0 24px 70px rgba(31, 41, 55, 0.08);
  text-align: center;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-sizing: border-box;
}
.error-img-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}
.error-img-wrap::after {
  content: "";
  position: absolute;
  bottom: 8px;
  left: 50%;
  width: 120px;
  height: 14px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.1);
  filter: blur(5px);
  transform: translateX(-50%);
}
.error-img {
  position: relative;
  z-index: 1;
  width: 200px;
  height: auto;
  opacity: 0.62;
  filter: grayscale(100%);
  object-fit: contain;
}
.error-code {
  margin-bottom: 8px;
  color: var(--text-primary);
  font-size: 48px;
  font-weight: 700;
  letter-spacing: 2px;
  line-height: 1;
}
.error-title {
  margin-bottom: 10px;
  color: var(--text-secondary);
  font-size: 18px;
  line-height: 1.4;
}
.error-desc {
  max-width: 360px;
  margin-bottom: 28px;
  color: var(--text-tertiary);
  font-size: 14px;
  line-height: 1.7;
}
.error-btn.el-button {
  min-width: 116px;
  height: 36px;
  padding: 0 24px;
  border-color: #454a52;
  border-radius: 8px;
  background: #454a52;
}
.error-btn.el-button:hover,
.error-btn.el-button:focus {
  border-color: #3a3e45;
  background: #3a3e45;
}
.app-content > .error-main {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}
.error-shell-404 {
  flex: 1;
  width: 100%;
  min-height: 0;
  padding: 40px 24px;
  background: #f2f3f5;
}
.error-shell-404 .error-page {
  width: auto;
  padding: 40px 24px;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
.error-shell-404 .error-img-wrap {
  margin-bottom: 24px;
}
.error-shell-404 .error-img {
  opacity: 0.6;
}
.error-shell-404 .error-title {
  margin-bottom: 8px;
}
.error-shell-404 .error-desc {
  margin-bottom: 32px;
  line-height: 1.6;
}
.error-shell-404 .error-btn.el-button {
  min-width: 0;
  height: auto;
  padding: 10px 28px;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
}
@media (max-width: 640px) {
  .error-shell {
    padding: 24px 16px;
  }
  .error-page {
    padding: 36px 22px;
  }
  .error-img {
    width: 168px;
  }
  .error-code {
    font-size: 40px;
  }
}