/* ==================== 认证页面样式 ==================== */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--blue-light) 0%, var(--green-light) 100%);
    padding: 100px 20px 40px;
}

.auth-container {
    max-width: 450px;
    width: 100%;
}

.auth-card {
    background: var(--white);
    border-radius: 1.5rem;
    padding: 3rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
}

.auth-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-green));
}

.auth-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.auth-logo {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.auth-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.auth-form {
    margin-top: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.form-input {
    width: 100%;
    padding: 0.875rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    font-size: 1rem;
    font-family: var(--font-family);
    transition: all 0.3s;
    background: var(--white);
    color: var(--text-primary);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-input.error {
    border-color: #ef4444;
}

.form-input.success {
    border-color: var(--primary-green);
}

.form-error {
    color: #ef4444;
    font-size: 0.85rem;
    margin-top: 0.5rem;
    display: none;
}

.form-error.show {
    display: block;
}

.form-success {
    color: var(--primary-green);
    font-size: 0.85rem;
    margin-top: 0.5rem;
    display: none;
}

.form-success.show {
    display: block;
}

.btn-group {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.btn-auth {
    flex: 1;
    padding: 0.875rem;
    border-radius: 0.75rem;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-auth-primary {
    background: var(--primary-blue);
    color: var(--white);
}

.btn-auth-primary:hover {
    background: var(--hover-blue);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 102, 255, 0.3);
}

.btn-auth-primary:disabled {
    background: var(--text-light);
    cursor: not-allowed;
    transform: none;
}

.btn-auth-secondary {
    background: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-auth-secondary:hover {
    background: var(--blue-light);
}

.verification-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.verification-group {
    display: flex;
    gap: 0.75rem;
}

.verification-input {
    flex: 1;
}

.btn-send-code {
    padding: 0.875rem 1.5rem;
    background: var(--primary-green);
    color: var(--white);
    border: none;
    border-radius: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}

.btn-send-code:hover {
    background: var(--hover-green);
}

.btn-send-code:disabled {
    background: var(--text-light);
    cursor: not-allowed;
}

.countdown {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.auth-footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.auth-footer a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

.auth-footer a:hover {
    color: var(--hover-blue);
}

.loading {
    display: none;
    text-align: center;
    margin-top: 1rem;
}

.loading.show {
    display: block;
}

.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-blue);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 响应式 */
@media (max-width: 768px) {
    .auth-card {
        padding: 2rem 1.5rem;
    }
    
    .auth-title {
        font-size: 1.5rem;
    }
    
    .verification-group {
        flex-direction: column;
    }
    
    .btn-send-code {
        width: 100%;
    }
}