* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  overflow: hidden;
}

/* 背景包装器 - 极光效果 */
.login-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
      ellipse at 20% 30%,
      rgba(138, 43, 226, 0.8) 0%,
      rgba(138, 43, 226, 0) 60%
    ),
    radial-gradient(
      ellipse at 80% 50%,
      rgba(0, 191, 255, 0.7) 0%,
      rgba(0, 191, 255, 0) 70%
    ),
    radial-gradient(
      ellipse at 50% 80%,
      rgba(50, 205, 50, 0.6) 0%,
      rgba(50, 205, 50, 0) 65%
    ),
    linear-gradient(135deg, #000000 0%, #0a0520 100%);
  background-blend-mode: overlay, screen, hard-light;
  overflow: hidden;
  animation: aurora-drift 25s infinite alternate ease-in-out;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-wrapper::before {
  content: "";
  position: absolute;
  width: 200%;
  height: 200%;
  top: -50%;
  left: -50%;
  background: repeating-linear-gradient(
      45deg,
      rgba(255, 255, 255, 0.02) 0px,
      rgba(255, 255, 255, 0.02) 1px,
      transparent 1px,
      transparent 40px
    ),
    repeating-linear-gradient(
      -45deg,
      rgba(255, 255, 255, 0.03) 0px,
      rgba(255, 255, 255, 0.03) 1px,
      transparent 1px,
      transparent 60px
    );
  animation: grid-shift 20s linear infinite;
  pointer-events: none;
}

.login-wrapper::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  background: radial-gradient(
    circle at center,
    transparent 70%,
    rgba(10, 5, 32, 0.9) 100%
  );
  animation: aurora-pulse 8s infinite alternate;
  pointer-events: none;
}

@keyframes aurora-drift {
  0% {
    background-position:
      0% 0%,
      0% 0%,
      0% 0%;
    filter: hue-rotate(0deg) brightness(1);
  }
  50% {
    background-position:
      -10% -5%,
      5% 10%,
      0% 15%;
    filter: hue-rotate(30deg) brightness(1.2);
  }
  100% {
    background-position:
      5% 10%,
      -10% -5%,
      15% 0%;
    filter: hue-rotate(60deg) brightness(1);
  }
}

@keyframes grid-shift {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(-50%, -50%);
  }
}

@keyframes aurora-pulse {
  0% {
    opacity: 0.8;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.05);
  }
  100% {
    opacity: 0.8;
    transform: scale(1);
  }
}

/* 主容器 - 适配极光背景 */
.container {
  display: flex;
  width: 620px;
  height: 520px;
  max-width: 95%;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background-color: rgba(10, 5, 32, 0.25);
  border-radius: 20px;
  box-shadow: 0px 0px 60px rgba(138, 43, 226, 0.2),
              0px 0px 40px rgba(0, 191, 255, 0.1),
              inset 0 0 30px rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  animation: slideUp 0.6s ease-out, container-glow 4s ease-in-out infinite alternate;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes container-glow {
  0% {
    box-shadow: 0px 0px 60px rgba(138, 43, 226, 0.2),
                0px 0px 40px rgba(0, 191, 255, 0.1),
                inset 0 0 30px rgba(255, 255, 255, 0.05);
  }
  50% {
    box-shadow: 0px 0px 80px rgba(138, 43, 226, 0.3),
                0px 0px 60px rgba(0, 191, 255, 0.2),
                inset 0 0 40px rgba(255, 255, 255, 0.08);
  }
  100% {
    box-shadow: 0px 0px 60px rgba(50, 205, 50, 0.2),
                0px 0px 40px rgba(0, 191, 255, 0.15),
                inset 0 0 30px rgba(255, 255, 255, 0.05);
  }
}

.container::after {
  position: absolute;
  content: "";
  width: 80%;
  height: 80%;
  right: -40%;
  background: rgb(157, 173, 203);
  background: radial-gradient(
    circle,
    rgba(157, 173, 203, 0.6) 61%,
    rgba(99, 122, 159, 0.4) 100%
  );
  border-radius: 50%;
  z-index: -1;
  pointer-events: none;
}

/* 左侧表单区域 */
.left {
  width: 60%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px;
}

/* 表单头部 */
.form-header {
  text-align: center;
  margin-bottom: 30px;
}

.system-title {
  font-size: 22px;
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 6px 0;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.system-subtitle {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin: 0;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

/* 表单样式 */
.form {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
  position: relative;
}

.form::before {
  position: absolute;
  content: "";
  width: 50%;
  height: 50%;
  right: -10%;
  top: 10%;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(
    circle,
    rgba(194, 13, 170, 0.3) 20%,
    rgba(26, 186, 235, 0.2) 60%,
    rgba(26, 186, 235, 0.1) 100%
  );
  filter: blur(60px);
  border-radius: 50%;
}

/* 输入框块 */
.input-block {
  position: relative;
  margin-bottom: 8px;
  z-index: 1;
}

.input,
button {
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 0.5rem;
  padding: 12px 14px;
  margin: 8px auto;
  width: 100%;
  display: block;
  color: #ffffff;
  font-weight: 500;
  font-size: 1em;
  font-family: inherit;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.input-block label {
  position: absolute;
  left: 14px;
  top: 37%;
  pointer-events: none;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95em;
  transition: all 0.4s ease;
}

.input:focus + label,
.input:valid + label {
  transform: translateY(-120%) scale(0.9);
  color: #ffffff;
  font-weight: 600;
  text-shadow: 0 1px 3px rgba(138, 43, 226, 0.5);
}

.input:focus {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(138, 43, 226, 0.5);
  box-shadow: 0 0 0 3px rgba(138, 43, 226, 0.2);
}

.input {
  box-shadow: inset 2px 2px 4px rgba(0, 0, 0, 0.2),
    2px 2px 4px rgba(138, 43, 226, 0.1);
}

/* 验证码区域 */
.captcha-block {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: nowrap;
}

.captcha-block .captcha-input {
  flex: 1;
  width: auto;
  min-width: 0;
}

.captcha-block label {
  left: 14px;
  top: 37%;
}

.captcha-block .input:focus + label,
.captcha-block .input:valid + label {
  transform: translateY(-120%) scale(0.9);
}

.captcha-image-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 110px;
  height: 48px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 0.5rem;
  overflow: hidden;
  flex-shrink: 0;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: 0;
  backdrop-filter: blur(10px);
  box-shadow: inset 2px 2px 4px rgba(0, 0, 0, 0.2),
    2px 2px 6px rgba(138, 43, 226, 0.1);
}

.captcha-image-wrapper:hover {
  border-color: rgba(138, 43, 226, 0.5);
  box-shadow: 0 0 0 3px rgba(138, 43, 226, 0.2),
    inset 2px 2px 4px rgba(0, 0, 0, 0.1);
  transform: scale(1.03);
}

.captcha-image-wrapper:active {
  transform: scale(0.98);
}

.captcha-image-wrapper.refreshing {
  animation: captcha-refresh 0.4s ease;
}

@keyframes captcha-refresh {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(0.95); opacity: 0.7; }
  100% { transform: scale(1); opacity: 1; }
}

.captcha-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  pointer-events: none;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

/* 底部链接 */
.forgot {
  display: block;
  margin: 5px 0 10px 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.85em;
}

.forgot a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  transition: color 0.3s ease;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

.forgot a:hover {
  color: #ffffff;
}

/* 登录按钮 */
button {
  background: linear-gradient(135deg, rgba(138, 43, 226, 0.8) 0%, rgba(0, 191, 255, 0.8) 100%);
  color: white;
  font-size: 1em;
  font-weight: 600;
  box-shadow: 0 4px 20px rgba(138, 43, 226, 0.3),
              0 2px 10px rgba(0, 191, 255, 0.2);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s ease;
}

button:hover {
  background: linear-gradient(135deg, rgba(138, 43, 226, 0.9) 0%, rgba(0, 191, 255, 0.9) 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(138, 43, 226, 0.4),
              0 4px 20px rgba(0, 191, 255, 0.3);
}

button:hover::before {
  left: 100%;
}

button:active {
  transform: translateY(0);
}

button:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* 加载动画 */
.btn-loader {
  display: flex;
  gap: 6px;
  justify-content: center;
  align-items: center;
}

.btn-loader .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ffffff;
  animation: bounce 0.9s ease infinite;
}

.btn-loader .dot:nth-child(2) {
  animation-delay: 0.15s;
}

.btn-loader .dot:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
    opacity: 0.7;
  }
  50% {
    transform: translateY(-8px);
    opacity: 1;
  }
}

/* 错误消息 */
.error-message {
  background: rgba(254, 242, 242, 0.95);
  border: 1px solid #fecaca;
  color: #dc2626;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 10px;
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

/* 右侧插图区域 */
.right {
  width: 40%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.img {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.img svg {
  max-width: 100%;
  max-height: 100%;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
}

/* 响应式设计 */
@media (max-width: 768px) {
  .container {
    flex-direction: column;
    width: 95%;
    height: auto;
    max-height: 90vh;
  }
  
  .left {
    width: 100%;
    padding: 30px 25px;
  }
  
  .right {
    display: none;
  }
  
  .system-title {
    font-size: 20px;
  }
  
  .container::after {
    display: none;
  }
}

@media (max-width: 480px) {
  .left {
    padding: 25px 20px;
  }
  
  .system-title {
    font-size: 18px;
  }
  
  .input, button {
    padding: 10px 12px;
    font-size: 0.95em;
  }
}