/* 基础样式保持不变 */
 * {
     margin: 0;
     padding: 0;
     box-sizing: border-box;
 }

 body {
     display: flex;
     height: 100vh;
     font-family: Arial, sans-serif;
     background-image: url('../v2_rerisk.png');
     justify-content: center;
     align-items: center;
 }

 /* 登录容器调整 */
 .login-container {
     position: relative;
     width: 1200px;
     height: 600px;
     display: flex;
     background: rgba(12, 25, 50, 0.9);
     border-radius: 10px;
     box-shadow: 0 0 30px rgba(0, 168, 255, 0.3);
 }

 /* 地球容器部分 */
 .earth-section {
     flex: 1;
     position: relative;
     display: flex;
     justify-content: center;
     align-items: center;
     overflow: hidden;
 }

 .earth-container {
     position: relative;
     width: 450px;
     height: 450px;
 }

 .earth {
     position: absolute;
     width: 280px;
     height: 280px;
     left: 50%;
     top: 50%;
     transform: translate(-50%, -50%);
     z-index: 2;
 }

 .ring {
     position: absolute;
     border: 2px dashed rgba(0, 255, 255, 0.4);
     border-radius: 50%;
     animation: rotate 30s linear infinite;
 }

 .ring:nth-child(1) {
     width: 400px;
     height: 400px;
     top: 25px;
     left: 25px;
 }

 .ring:nth-child(2) {
     width: 350px;
     height: 350px;
     top: 50px;
     left: 50px;
     animation: rotate-reverse 25s linear infinite;
 }

 .ring:nth-child(3) {
     width: 450px;
     height: 450px;
     animation: rotate 35s linear infinite;
 }

 /* 右侧登录表单部分 */
 .form-section {
     flex: 1;
     position: relative;
     padding: 60px;
 }

 /* 表单元素微调 */
 .input-group {
     margin-bottom: 40px;
     position: relative;
 }

 .input-label {
     color: #00ffff;
     font-size: 18px;
     margin-bottom: 10px;
     display: block;
 }

 .input-field {
     width: 100%;
     height: 50px;
     background: #1a2951;
     border: 1px solid #00ffff;
     border-radius: 4px;
     color: white;
     padding: 0 15px;
     font-size: 16px;
     transition: all 0.3s;
 }

 .input-field:focus {
     border-color: #03ecf1;
     box-shadow: 0 0 10px rgba(3, 236, 241, 0.3);
     outline: none;
 }

 /* 登录按钮调整 */
 .login-btn-container {
     margin-top: 40px;
     position: relative;
     width: 100%;
     height: 60px;
     cursor: pointer;
     transition: transform 0.2s;
 }

 .login-btn-bg {
     width: 100%;
     height: 100%;
     background: linear-gradient(45deg, #00ffff, #03ecf1);
     border-radius: 4px;
     opacity: 0.8;
     transition: all 0.3s;
 }

 .login-btn-text {
     position: absolute;
     top: 50%;
     left: 50%;
     transform: translate(-50%, -50%);
     color: #0a1a3a;
     font-size: 22px;
     font-weight: bold;
     letter-spacing: 2px;
 }

 .login-btn-container:hover .login-btn-bg {
     opacity: 1;
     box-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
 }

 /* 动画 */
 @keyframes rotate {
     from { transform: rotate(0deg); }
     to { transform: rotate(360deg); }
 }

 @keyframes rotate-reverse {
     from { transform: rotate(0deg); }
     to { transform: rotate(-360deg); }
 }

 /* 响应式设计 */
 @media (max-width: 1200px) {
     .login-container {
         width: 90%;
         height: auto;
         flex-direction: column;
         padding: 30px;
     }

     .earth-container {
         width: 300px;
         height: 300px;
         margin-bottom: 30px;
     }

     .earth {
         width: 200px;
         height: 200px;
     }

     .ring:nth-child(1) { width: 300px; height: 300px; }
     .ring:nth-child(2) { width: 250px; height: 250px; }
     .ring:nth-child(3) { width: 350px; height: 350px; }

     .form-section {
         padding: 20px;
     }
 }


/* 在原有body样式中添加position: relative */
body {
    display: flex;
    height: 100vh;
    font-family: Arial, sans-serif;
    background-image: url('../v2_rerisk.png');
    justify-content: center;
    align-items: center;
    position: relative; /* 新增 */
}


.system-title {
    position: absolute;
    top: 90px;
    width: 100%;
    text-align: center;
    color: #E1F5FE; /* 冰蓝色（比表单标题更浅） */
    font-size: 48px;
    font-weight: 600;
    text-shadow: 
        0 0 8px rgba(0, 180, 255, 0.7), /* 内层光晕 */
        0 0 20px rgba(0, 80, 120, 0.5); /* 外层光晕 */
    letter-spacing: 3px;
    z-index: 10;
    font-family: 'Microsoft YaHei', sans-serif;
    text-transform: uppercase; /* 可选：字母大写增强形式感 */
}

.form-title {
    color: #03ecf1; /* 保持原有的科技蓝 */
    font-size: 42px;
    margin-bottom: 50px;
    text-align: center;
    text-shadow: 
        0 0 8px rgba(3, 236, 241, 0.7),
        0 0 15px rgba(3, 236, 241, 0.3); /* 减少光晕范围 */
    font-weight: 500; /* 比主标题稍细 */
}