body {
    min-height: 100vh;
    background: linear-gradient(120deg, #e0e7ff 0%, #f8fafc 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;
}
.login-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.login-main {
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 8px 32px rgba(60, 80, 180, 0.10);
    width: 350px;
    height: 428px;
    padding: 38px 32px 28px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow-y: auto;
    justify-content: space-between;
}
.brand-logo {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4f8cff 0%, #6ee7b7 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    box-shadow: 0 2px 8px rgba(79,140,255,0.08);
}
.brand-logo span {
    font-size: 2.2rem;
    color: #fff;
    font-weight: bold;
    letter-spacing: 2px;
}
.login-title {
    font-size: 22px;
    font-weight: 600;
    color: #22336b;
    margin-bottom: 6px;
    letter-spacing: 1px;
}
.login-desc {
    color: #6b7280;
    font-size: 14px;
    margin-bottom: 22px;
}
.login-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
    min-height: 0;
}
.form-group {
    width: 100%;
    margin-bottom: 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}
.form-group label {
    font-size: 13px;
    color: #6b7280;
    font-weight: 500;
    width: 80px;
    flex-shrink: 0;
    padding-top: 12px;
    line-height: 1.5;
}
.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 14px;
    color: #22336b;
    transition: all 0.2s;
    box-sizing: border-box;
}
.form-input:focus {
    outline: none;
    border-color: #4f8cff;
    box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.1);
}
.form-input:disabled {
    background-color: #f9fafb;
    color: #9ca3af;
    cursor: not-allowed;
    opacity: 0.7;
}
.form-group .form-input-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
}
.input-group {
    display: flex;
    gap: 8px;
    align-items: flex-start;
}
.input-group .form-input {
    flex: 1;
}
.captcha-img {
    width: 100px;
    height: 40px;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    cursor: pointer;
    background: #f9fafb;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.captcha-img img {
    width: 100%;
    height: 100%;
    border-radius: 6px;
}
.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    box-sizing: border-box;
}
.btn-primary {
    background: linear-gradient(135deg, #4f8cff 0%, #6ee7b7 100%);
    color: #fff;
}
.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 140, 255, 0.3);
}
.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}
.btn-primary:disabled {
    background: #d1d5db;
    cursor: not-allowed;
    opacity: 0.6;
}
.btn-secondary {
    background: #f4f7fb;
    color: #22336b;
    border: 1px solid #e5e7eb;
}
.btn-secondary:hover:not(:disabled) {
    background: #e5e7eb;
}
.btn-secondary:disabled {
    background: #f9fafb;
    color: #9ca3af;
    cursor: not-allowed;
}
.error-msg {
    color: #ef4444;
    font-size: 12px;
    margin-top: 4px;
    display: none;
}
.error-msg.show {
    display: block;
}
.login-links {
    margin-top: 0;
    text-align: center;
    padding: 0;
    min-height: 20px;
    flex-shrink: 0;
}
.login-links:empty {
    display: none;
}
.login-links a {
    color: #6b7280;
    text-decoration: none;
    font-size: 13px;
    font-weight: 400;
    transition: all 0.2s ease;
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    position: relative;
}
.login-links a:hover {
    color: #22336b;
    background-color: #f4f7fb;
}
.login-links a:active {
    color: #1e293b;
}
.login-links .separator {
    color: #d1d5db;
    margin: 0 4px;
    display: inline-block;
    font-weight: 300;
}
.login-footer {
    margin-top: 20px;
    font-size: 12px;
    color: #b2bec3;
    text-align: center;
    width: 100%;
}
.step-indicator {
    display: none;
}
@media (max-width: 480px) {
    .login-main {
        width: 98vw;
        min-width: unset;
        padding: 18px 4vw 12px 4vw;
    }
}