/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
    font-size: 16px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 95%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 通用组件样式 */
.section-title {
    font-size: 36px;
    font-weight: 700;
    color: #002b5c;
    text-align: center;
    margin-bottom: 25px;
    letter-spacing: -0.5px;
}

.section-description {
    font-size: 18px;
    color: #555;
    text-align: center;
    max-width: 900px;
    margin: 0 auto 50px;
    line-height: 1.8;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 4px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 16px;
    letter-spacing: 0.5px;
}

.btn-primary {
    background-color: #e74c3c;
    color: white;
}

.btn-primary:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
    background-color: transparent;
    color: #002b5c;
    border: 2px solid #002b5c;
}

.btn-secondary:hover {
    background-color: rgba(0, 43, 92, 0.1);
    transform: translateY(-2px);
}

.highlight {
    color: #4361ee;
}

.required {
    color: #e74c3c;
}

/* 英雄区域样式 */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #f5f7ff 0%, #e8ecfd 100%);
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 2;
}

.hero-content {
    flex: 1;
    padding-right: 60px;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 30px;
    color: #002b5c;
    letter-spacing: -0.5px;
}

.hero-features {
    margin-bottom: 30px;
}

.hero-features li {
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    font-size: 20px;
    color: #444;
}

.hero-features li i {
    color: #4CAF50;
    margin-right: 12px;
    font-size: 22px;
}

.cta-buttons {
    margin-top: 40px;
}

.certification {
    margin-top: 18px;
    font-size: 16px;
    color: #e74c3c;
    font-weight: 500;
}

.hero-image {
    flex: 1;
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

/* 关于我们区域样式 */
.about {
    padding: 100px 0;
    background-color: #fff;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.product-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.product-image {
    height: 220px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-info {
    padding: 25px;
}

.product-info h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #002b5c;
}

.product-info p {
    font-size: 16px;
    color: #555;
    margin-bottom: 20px;
    line-height: 1.6;
}

.read-more {
    display: inline-flex;
    align-items: center;
    color: #e74c3c;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    padding: 8px 16px;
    border-radius: 4px;
    background-color: rgba(231, 76, 60, 0.1);
}

.read-more i {
    margin-left: 8px;
    transition: transform 0.3s ease;
}

.read-more:hover {
    color: #fff;
    background-color: #e74c3c;
}

.read-more:hover i {
    transform: translateX(5px);
}

.contact-support {
    text-align: center;
    margin-top: 60px;
    padding: 25px;
    background-color: #f8f9fa;
    border-radius: 8px;
    font-size: 18px;
}

.contact-link {
    color: #e74c3c;
    font-weight: 600;
}

.contact-link:hover {
    text-decoration: underline;
}

/* 为什么选择我们区域样式 */
.why-choose-us {
    padding: 100px 0;
    background-color: #f8f9ff;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: #e74c3c;
    text-transform: uppercase;
    margin-bottom: 15px;
    letter-spacing: 1px;
}

.section-header h3 {
    font-size: 36px;
    font-weight: 700;
    color: #002b5c;
    letter-spacing: -0.5px;
}

.why-choose-content {
    display: flex;
    align-items: flex-start;
    gap: 60px;
}

.why-choose-text {
    flex: 1;
}

.why-choose-text p {
    font-size: 18px;
    color: #555;
    line-height: 1.8;
    margin-bottom: 40px;
}

.accordion {
    margin-bottom: 40px;
}

.accordion-item {
    margin-bottom: 15px;
    border: 1px solid #e1e4e8;
    border-radius: 8px;
    overflow: hidden;
}

.accordion-header {
    padding: 18px 25px;
    background-color: #f8f9fa;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.accordion-header:hover {
    background-color: #e9ecef;
}

.accordion-header h4 {
    font-size: 18px;
    font-weight: 600;
    color: #002b5c;
    margin: 0;
    flex: 1;
}

.accordion-icon i {
    transition: transform 0.3s ease;
    color: #002b5c;
    font-size: 16px;
}

.accordion-item.active .accordion-icon i {
    transform: rotate(90deg);
}

.accordion-content {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.accordion-item.active .accordion-content {
    padding: 18px 25px;
}

.accordion-content p {
    margin: 0;
    color: #555;
    font-size: 16px;
}

.why-choose-images {
    flex: 1;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.image-grid img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.image-grid img:hover {
    transform: scale(1.05);
}

/* 应用领域区域样式 */
.applications {
    padding: 100px 0;
    background-color: #fff;
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.application-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.application-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.application-image {
    height: 200px;
    overflow: hidden;
}

.application-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.application-card:hover .application-image img {
    transform: scale(1.05);
}

.application-info {
    padding: 25px;
}

.application-info h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #002b5c;
}

.application-info p {
    font-size: 16px;
    color: #555;
    line-height: 1.6;
}

/* 包装区域样式 */
.packaging {
    padding: 100px 0;
    background-color: #002b5c;
    color: white;
}

.packaging-content {
    display: flex;
    align-items: center;
    gap: 60px;
}

.packaging-text {
    flex: 1;
}

.packaging-text h4 {
    font-size: 18px;
    font-weight: 600;
    color: #e74c3c;
    text-transform: uppercase;
    margin-bottom: 15px;
    letter-spacing: 1px;
}

.packaging-text h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 30px;
    letter-spacing: -0.5px;
}

.packaging-features {
    margin-bottom: 40px;
}

.packaging-features li {
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    font-size: 18px;
}

.packaging-features li i {
    color: #4CAF50;
    margin-right: 15px;
    font-size: 20px;
}

.packaging-images {
    flex: 1;
}

.packaging .image-grid {
    grid-template-columns: repeat(3, 1fr);
}

.packaging .image-grid img {
    height: 140px;
    border-radius: 4px;
}

/* FAQ区域样式 */
.faq {
    padding: 100px 0;
    background-color: #f8f9ff;
}

.faq-accordion {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 20px;
    border: 1px solid #e1e4e8;
    border-radius: 8px;
    overflow: hidden;
}

.faq-question {
    padding: 25px;
    background-color: #fff;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background-color: #f8f9fa;
}

.faq-question h3 {
    font-size: 18px;
    font-weight: 600;
    color: #002b5c;
    margin: 0;
    flex: 1;
    padding-right: 20px;
}

.faq-icon i {
    transition: transform 0.3s ease;
    color: #002b5c;
    font-size: 16px;
}

.faq-item.active .faq-icon i {
    transform: rotate(90deg);
}

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    background-color: #f8f9fa;
}

.faq-item.active .faq-answer {
    padding: 25px;
}

.faq-answer p {
    margin: 0;
    color: #555;
    line-height: 1.8;
    font-size: 16px;
}

/* 联系表单区域样式 */
.contact-form {
    padding: 100px 0;
    background-color: #fff;
}

.form-container {
    display: flex;
    gap: 50px;
    max-width: 1100px;
    margin: 0 auto;
    background-color: #f8f9ff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.form-info {
    flex: 1;
    padding: 50px;
    background-color: #002b5c;
    color: white;
}

.form-info h2 {
    font-size: 30px;
    font-weight: 700;
    margin-bottom: 25px;
    letter-spacing: -0.5px;
}

.form-info p {
    font-size: 18px;
    margin-bottom: 30px;
    line-height: 1.8;
    opacity: 0.9;
}

.contact-methods {
    margin-top: 50px;
}

.contact-method {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.contact-method i {
    font-size: 24px;
    margin-right: 15px;
    color: #e74c3c;
}

.contact-method a {
    color: white;
    font-weight: 500;
    font-size: 18px;
}

.contact-method a:hover {
    text-decoration: underline;
}

.contact-form-element {
    flex: 1;
    padding: 50px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 500;
    color: #333;
    font-size: 16px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    font-family: 'Segoe UI', 'Arial', sans-serif;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: #002b5c;
    outline: none;
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

/* 提交按钮样式 */
.submit-btn {
    background-color: #e74c3c;
    color: white;
    border: none;
    padding: 16px 30px;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: block;
    width: 100%;
    font-size: 18px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.submit-btn:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* 页脚样式 */
.footer {
    background-color: #1a1a1a;
    color: #fff;
    padding: 80px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-bottom: 50px;
}

.footer-logo {
    flex: 1;
    min-width: 250px;
    margin-bottom: 30px;
}

.footer-logo img {
    max-height: 50px;
    margin-bottom: 20px;
}

.footer-logo h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 15px;
    letter-spacing: 0.5px;
}

.footer-logo p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact {
    flex: 1;
    min-width: 250px;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.contact-item i {
    font-size: 20px;
    margin-right: 15px;
    color: #e74c3c;
}

.contact-item a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s ease;
    font-size: 16px;
}

.contact-item a:hover {
    color: white;
}

.footer-cta {
    flex: 1;
    min-width: 250px;
}

.footer-cta h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 15px;
}

.footer-cta p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

.whatsapp-link {
    display: inline-flex;
    align-items: center;
    background-color: #25D366;
    color: white;
    padding: 12px 20px;
    border-radius: 4px;
    font-weight: 600;
    transition: all 0.3s ease;
    font-size: 16px;
}

.whatsapp-link i {
    font-size: 22px;
    margin-right: 12px;
}

.whatsapp-link:hover {
    background-color: #128C7E;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

/* 固定联系按钮 */
.fixed-contact-buttons {
    position: fixed;
    right: 20px;
    bottom: 100px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
}

.fixed-email-btn,
.fixed-whatsapp-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.fixed-email-btn {
    background-color: #e74c3c;
    color: white;
}

.fixed-whatsapp-btn {
    background-color: #25D366;
    color: white;
}

.fixed-contact-buttons a i {
    font-size: 24px;
}

.fixed-email-btn:hover,
.fixed-whatsapp-btn:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.25);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
    }
    
    .hero-content {
        padding-right: 0;
        margin-bottom: 50px;
        text-align: center;
    }
    
    .hero-features li {
        justify-content: center;
    }
    
    .why-choose-content {
        flex-direction: column;
    }
    
    .packaging-content {
        flex-direction: column;
    }
    
    .form-container {
        flex-direction: column;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: 30px;
    }
    
    .hero-content h1 {
        font-size: 36px;
    }
    
    .products-grid,
    .applications-grid {
        grid-template-columns: 1fr;
    }
    
    .packaging .image-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        flex-direction: column;
    }
    
    .email-info {
        display: none !important;
    }
    
    .fixed-contact-buttons {
        right: 15px;
        bottom: 80px;
    }
    
    .fixed-email-btn,
    .fixed-whatsapp-btn {
        width: 50px;
        height: 50px;
    }
}

@media (max-width: 576px) {
    .hero {
        padding: 130px 0 70px;
    }
    
    .hero-content h1 {
        font-size: 30px;
    }
    
    .section-title {
        font-size: 26px;
    }
    
    .section-header h3 {
        font-size: 26px;
    }
    
    .packaging-text h2 {
        font-size: 26px;
    }
    
    .image-grid {
        grid-template-columns: 1fr;
    }
    
    .form-info,
    .contact-form-element {
        padding: 30px;
    }
}