/* 订阅通讯部分样式 - 居中美化设计 */
.newsletter-form * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.newsletter-section {
    background: linear-gradient(135deg, #f8fafb 0%, #e8f4f3 100%);
    padding: 80px 0;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

.newsletter-wrapper {
    background: rgba(255, 255, 255, 0.98);
    padding: 50px 45px 45px 45px;
    border-radius: 20px;
    box-shadow: 
        0 15px 40px rgba(0, 169, 157, 0.12),
        0 6px 20px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    text-align: center;
    position: relative;
    max-width: 680px;
    width: 90%;
    margin: 0 auto;
    border: 1px solid rgba(0, 169, 157, 0.15);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
}

.newsletter-header {
    margin-bottom: 40px;
}

.newsletter-header h3 {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), #007d73);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    letter-spacing: -0.5px;
}

.newsletter-form {
    position: relative;
}

.form-row {
    display: flex;
    align-items: stretch;
    max-width: 520px;
    margin: 0 auto;
    background: white;
    border: 2px solid rgba(0, 169, 157, 0.2);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 6px 20px rgba(0, 169, 157, 0.1);
    position: relative;
}

.form-group {
    position: relative;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: stretch;
}

.form-group:first-child {
    flex: 1;
}

.newsletter-form input[type="email"] {
    width: 100%;
    height: 100%;
    padding: 18px 24px;
    border: none;
    font-size: 16px;
    background: transparent;
    color: var(--text-color);
    outline: none;
    font-family: inherit;
}

.subscribe-btn {
    padding: 18px 32px;
    background: linear-gradient(135deg, var(--primary-color), #008a7c);
    color: white;
    border: none;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    position: relative;
    overflow: hidden;
    min-width: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* 表单反馈样式 */
.form-feedback {
    margin-top: 0;
    min-height: 0;
    transition: all 0.3s ease;
    padding-top: 0;
}

.form-feedback.show {
    margin-top: 25px;
}

.form-feedback .success-message,
.form-feedback .error-message {
    display: none;
    padding: 15px 25px;
    border-radius: 12px;
    font-weight: 500;
    align-items: center;
    gap: 10px;
    justify-content: center;
    animation: fadeInUp 0.5s ease;
    border: 1px solid;
    max-width: 400px;
    margin: 0 auto;
    font-size: 15px;
}

.form-feedback .success-message {
    background: linear-gradient(135deg, #f0fdf4, #dcfce7);
    color: #166534;
    border-color: #22c55e;
    box-shadow: 0 4px 15px rgba(34, 197, 94, 0.15);
}

.form-feedback .error-message {
    background: linear-gradient(135deg, #fef2f2, #fee2e2);
    color: #dc2626;
    border-color: #ef4444;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.15);
}

.form-feedback.show .success-message,
.form-feedback.show .error-message {
    display: flex;
}

.form-feedback.show-success .success-message {
    display: flex;
}

.form-feedback.show-error .error-message {
    display: flex;
}

.form-feedback i {
    font-size: 1.1rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .newsletter-section {
        padding: 60px 0;
        min-height: 350px;
    }
    
    .newsletter-wrapper {
        padding: 35px 30px;
        margin: 0 20px;
        border-radius: 16px;
        max-width: 100%;
    }
    
    .newsletter-header h3 {
        font-size: 22px;
        flex-direction: column;
        gap: 8px;
    }
    
    .newsletter-header p {
        font-size: 15px;
    }
    
    .form-row {
        max-width: 100%;
        flex-direction: column;
        border-radius: 14px;
    }
    
    .newsletter-form input[type="email"] {
        padding: 18px 20px;
        border-bottom: 1px solid #e2e8f0;
        border-radius: 14px 14px 0 0;
    }
    
    .subscribe-btn {
        width: 100%;
        padding: 18px 24px;
        border-radius: 0 0 14px 14px;
    }
}

@media (max-width: 480px) {
    .newsletter-section {
        padding: 50px 0;
        min-height: 320px;
    }
    
    .newsletter-wrapper {
        padding: 30px 25px;
        margin: 0 15px;
        border-radius: 12px;
    }
    
    .newsletter-header h3 {
        font-size: 20px;
        flex-direction: column;
        gap: 8px;
    }
    
    .newsletter-header p {
        font-size: 14px;
    }
    
    .form-row {
        border-radius: 12px;
    }
    
    .newsletter-form input[type="email"] {
        padding: 16px 18px;
        border-radius: 12px 12px 0 0;
    }
    
    .subscribe-btn {
        padding: 16px 20px;
        border-radius: 0 0 12px 12px;
        font-size: 14px;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.fa-spinner {
    animation: spin 1s linear infinite;
}

/* 增强的悬停效果 */
.newsletter-wrapper::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color), var(--primary-color));
    border-radius: 22px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.newsletter-wrapper:hover::after {
    opacity: 0.1;
}