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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 30px;
    text-align: center;
}

.login-header h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.login-subtitle {
    font-size: 14px;
    opacity: 0.85;
}

.login-body {
    padding: 30px;
}

.error-msg {
    background: #fff0f0;
    color: #d63031;
    border: 1px solid #ffd4d4;
    border-radius: 6px;
    padding: 10px 14px;
    font-size: 14px;
    margin-bottom: 16px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #333;
    margin-bottom: 6px;
}

.form-group input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 15px;
    color: #333;
    background: #fafafa;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.form-group input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
    background: #fff;
}

.form-group input::placeholder {
    color: #aaa;
}

.login-btn {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.1s;
}

.login-btn:hover {
    opacity: 0.9;
}

.login-btn:active {
    transform: scale(0.98);
}

.login-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.login-footer {
    margin-top: 20px;
    text-align: center;
}

.login-footer p {
    font-size: 12px;
    color: #999;
}

/* 网络环境标志 */
.network-info {
    text-align: center;
    margin-bottom: 16px;
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-lan {
    background: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #a5d6a7;
}

.badge-wan {
    background: #fff3e0;
    color: #e65100;
    border: 1px solid #ffcc80;
}