/* 全局样式 */
:root {
    --primary-color: #4CAF50;
    --secondary-color: #2E7D32;
    --accent-color: #8BC34A;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --light-green: rgba(76, 175, 80, 0.1);
    --dark-gray: #666;
    --white: #fff;
    --box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    --card-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
    font-size: 2.5rem;
    color: var(--primary-color);
    position: relative;
    padding-bottom: 15px;
    font-weight: 700;
}

.section-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--accent-color);
}

.section-subtitle {
    text-align: center;
    margin-bottom: 50px;
    font-size: 1.3rem;
    color: var(--dark-gray);
    font-weight: 500;
}

.btn {
    display: inline-block;
    padding: 14px 30px;
    border-radius: 30px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    letter-spacing: 0.5px;
}

.primary-btn {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
}

.large-btn {
    font-size: 1.2rem;
    padding: 18px 40px;
    letter-spacing: 1px;
    font-weight: 700;
}

.primary-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: var(--box-shadow);
}

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

.secondary-btn:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
}

/* 导航栏 */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo img {
    height: 50px;
    margin-right: 15px;
    cursor: default; /* Logo不可点击 */
}

.brand-name {
    display: flex;
    flex-direction: column;
}

.brand-name h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin: 0;
    font-weight: 700;
    line-height: 1.2;
}

.brand-name span {
    font-size: 0.8rem;
    color: var(--dark-gray);
}

.nav-links {
    display: flex;
    align-items: center;
}

.nav-links li {
    margin-left: 15px;
}

.nav-link {
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 12px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    white-space: nowrap;
}

.nav-link i {
    margin-right: 6px;
}

.nav-link:hover {
    color: var(--primary-color);
    background-color: var(--light-green);
}

.highlight-link {
    color: var(--white);
    background-color: var(--primary-color);
}

.highlight-link:hover {
    color: var(--white);
    background-color: var(--secondary-color);
}

/* 主轮播图 - 现代化设计 */
.hero {
    background-color: var(--white);
    padding: 30px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -200px;
    right: -200px;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background-color: var(--light-green);
    z-index: 0;
    opacity: 0.5;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    padding-right: 80px;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 10px;
    color: var(--primary-color);
    font-weight: 800;
    white-space: nowrap;
}

.hero-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--text-color);
    line-height: 1.3;
    font-weight: 500;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--dark-gray);
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

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

.hero-image img {
    max-width: 100%;
    border-radius: 0;
    box-shadow: none;
    transition: transform 0.5s ease;
}

.hero-image img:hover {
    transform: none;
}

/* 学校合作展示区 */
.trusted-by {
    padding: 40px 0;
    background-color: var(--light-gray);
}

.trusted-title {
    text-align: center;
    margin-bottom: 30px;
    font-size: 1.2rem;
    color: var(--dark-gray);
    font-weight: 500;
}

.marquee {
    overflow: hidden;
    white-space: nowrap;
    display: flex;
}

.marquee-content {
    display: flex;
    animation: marquee 20s linear infinite;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-100%); }
}

.marquee-content span {
    display: inline-block;
    margin: 0 40px;
    font-size: 1.1rem;
    color: var(--dark-gray);
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 30px;
    background-color: rgba(76, 175, 80, 0.1);
}

/* 核心优势 - 现代化卡片设计 */
.features {
    padding: 100px 0;
    background-color: var(--white);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.feature-card {
    background: var(--white);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--card-shadow);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-15px);
    box-shadow: var(--box-shadow);
    border-color: var(--accent-color);
}

.feature-icon {
    font-size: 2.8rem;
    color: var(--primary-color);
    margin-bottom: 25px;
    height: 70px;
    width: 70px;
    line-height: 70px;
    border-radius: 50%;
    background-color: var(--light-green);
    margin: 0 auto 25px;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background-color: var(--primary-color);
    color: var(--white);
}

.feature-card h3 {
    margin-bottom: 15px;
    color: var(--text-color);
    font-size: 1.4rem;
}

.feature-card p {
    color: var(--dark-gray);
}

/* 产品效果对比 - 更现代的布局 */
.comparison {
    padding: 100px 0;
    background-color: var(--light-gray);
}

.comparison-layout {
    display: flex;
    align-items: center;
    gap: 60px;
}

.comparison-text {
    flex: 1;
}

.comparison-text h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--text-color);
}

.comparison-text p {
    margin-bottom: 30px;
    color: var(--dark-gray);
    font-size: 1.1rem;
}

.feature-list {
    margin-top: 30px;
}

.feature-list li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    font-size: 1.1rem;
}

.feature-list li i {
    color: var(--primary-color);
    margin-right: 10px;
    font-size: 1.2rem;
}

.comparison-image {
    flex: 1;
}

.comparison-image img {
    border-radius: 16px;
    box-shadow: var(--box-shadow);
    transition: transform 0.5s ease;
}

.comparison-image img:hover {
    transform: scale(1.02);
}

/* 轮播图展示区 */
.carousel-section {
    padding: 100px 0;
    background-color: var(--light-gray);
}

/* 轮播容器 */
.carousel-container {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: var(--box-shadow);
    background-color: var(--white);
}

.carousel-slides {
    position: relative;
    min-height: 400px; /* 确保有足够的高度 */
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: 1;
    visibility: hidden;
}

.carousel-slide.active {
    opacity: 1;
    position: relative;
    z-index: 2;
    visibility: visible;
}

.showcase-image {
    width: 100%;
    padding: 30px;
    background-color: var(--white);
}

.showcase-img {
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
    margin: 0 auto;
    max-height: 500px;
}

.showcase-caption {
    padding: 20px 30px 30px;
    background-color: var(--white);
    border-top: 1px solid rgba(0,0,0,0.05);
}

.showcase-caption h3 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-weight: 600;
}

.showcase-caption p {
    color: var(--dark-gray);
    line-height: 1.6;
    font-size: 1rem;
}

/* 轮播导航按钮 */
.carousel-nav {
    display: flex;
    justify-content: center;
    margin: 20px 0;
}

.carousel-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
    background-color: var(--light-gray);
    margin: 0 8px;
    cursor: pointer;
    transition: var(--transition);
}

.carousel-btn.active, .carousel-btn:hover {
    background-color: var(--primary-color);
    transform: scale(1.2);
}

/* 左右切换按钮 */
.carousel-prev, .carousel-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.8);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 10;
    transition: var(--transition);
}

.carousel-prev {
    left: 20px;
}

.carousel-next {
    right: 20px;
}

.carousel-prev:hover, .carousel-next:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .carousel-container {
        border-radius: 8px;
    }
    
    .showcase-image {
        padding: 15px;
    }
    
    .showcase-img {
        max-height: 300px;
    }
    
    .showcase-caption {
        padding: 15px 20px 20px;
    }
    
    .showcase-caption h3 {
        font-size: 1.2rem;
    }
    
    .carousel-prev, .carousel-next {
        width: 30px;
        height: 30px;
    }
    
    .carousel-prev {
        left: 10px;
    }
    
    .carousel-next {
        right: 10px;
    }
}

/* 实证研究 - Tab式设计 */
.research {
    padding: 100px 0;
    background-color: var(--white);
}

.research-tabs {
    max-width: 1000px;
    margin: 0 auto;
}

.tab-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
}

.tab-btn {
    padding: 12px 30px;
    margin: 0 10px;
    border: none;
    background-color: var(--light-gray);
    color: var(--dark-gray);
    font-size: 1.1rem;
    font-weight: 500;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn.active, .tab-btn:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    0% { opacity: 0; }
    100% { opacity: 1; }
}

.research-content, .paper-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.research-text, .paper-content {
    flex: 1;
}

.research-text h3, .paper-content h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-color);
}

.research-text p, .paper-content p {
    margin-bottom: 15px;
    color: var(--dark-gray);
    font-size: 1.1rem;
}

.research-image, .paper-image {
    flex: 1;
}

.research-image img, .paper-image img {
    border-radius: 16px;
    box-shadow: var(--box-shadow);
    transition: transform 0.5s ease;
}

.research-image img:hover, .paper-image img:hover {
    transform: scale(1.02);
}

/* 用户评价 - 卡片式设计 */
.testimonials {
    padding: 100px 0;
    background-color: var(--light-gray);
}

.testimonial-slider {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
}

.testimonial-card {
    background-color: var(--white);
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--card-shadow);
    max-width: 350px;
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow);
}

.testimonial-quote {
    margin-bottom: 20px;
}

.testimonial-quote i {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 10px;
    display: block;
}

.testimonial-quote p {
    color: var(--dark-gray);
    font-style: italic;
    line-height: 1.7;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.testimonial-avatar {
    margin-right: 15px;
}

.testimonial-avatar i {
    font-size: 2.5rem;
    color: var(--dark-gray);
}

.testimonial-info h4 {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 5px;
}

.testimonial-info p {
    color: var(--dark-gray);
    font-size: 0.9rem;
}

/* 公司愿景 - 现代化设计 */
.vision {
    padding: 100px 0;
    background-color: var(--white);
}

.vision-wrapper {
    max-width: 1000px;
    margin: 0 auto;
}

.vision-content {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 60px;
}

.vision-item {
    text-align: center;
    max-width: 350px;
    padding: 40px 30px;
    background-color: var(--white);
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.vision-item:hover {
    transform: translateY(-15px);
    box-shadow: var(--box-shadow);
    border-color: var(--accent-color);
}

.vision-item i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    height: 80px;
    width: 80px;
    line-height: 80px;
    border-radius: 50%;
    background-color: var(--light-green);
    margin: 0 auto 25px;
    transition: var(--transition);
}

.vision-item:hover i {
    background-color: var(--primary-color);
    color: var(--white);
}

.vision-item h3 {
    margin-bottom: 15px;
    color: var(--text-color);
    font-size: 1.6rem;
}

.vision-item p {
    font-size: 1.1rem;
    color: var(--dark-gray);
}

.about-product {
    background-color: var(--light-gray);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
}

.about-product h3 {
    margin-bottom: 20px;
    color: var(--text-color);
    font-size: 1.6rem;
}

.about-product p {
    margin-bottom: 15px;
    color: var(--dark-gray);
    line-height: 1.8;
}

/* 快速体验 - 直接展示卡片组 */
.quick-access {
    padding: 100px 0;
    background-color: var(--light-gray);
}

.access-cards {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
}

.access-card {
    background-color: var(--white);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--card-shadow);
    max-width: 300px;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.access-card:hover {
    transform: translateY(-15px);
    box-shadow: var(--box-shadow);
    border-color: var(--accent-color);
}

.access-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.access-card h3 {
    font-size: 1.4rem;
    color: var(--text-color);
    margin-bottom: 20px;
}

.qr-code {
    margin: 0 auto 20px;
    width: 150px;
    height: 150px;
    padding: 10px;
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
}

.qr-code img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.qr-code.customer img {
    object-fit: cover;
    border-radius: 5px;
}

.access-card p {
    color: var(--dark-gray);
    font-size: 1rem;
}

/* 页脚 - 新的现代设计 */
.white-footer {
    background-color: #f8f9fa;
    color: var(--text-color);
    padding: 60px 0 20px;
    border-top: 1px solid rgba(0,0,0,0.05);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 30px;
}

.footer-column h3 {
    margin-bottom: 25px;
    color: var(--primary-color);
    font-size: 1.3rem;
    font-weight: 600;
    position: relative;
}

.footer-column h3::after {
    content: "";
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--accent-color);
}

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.footer-logo img {
    margin-right: 15px;
    border-radius: 8px;
}

.footer-logo h3 {
    margin-bottom: 5px;
    font-size: 1.4rem;
}

.footer-logo p {
    color: var(--dark-gray);
    font-size: 0.9rem;
}

.footer-desc {
    color: var(--dark-gray);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.footer-links-list li {
    margin-bottom: 15px;
}

.footer-link {
    opacity: 0.8;
    transition: var(--transition);
    display: flex;
    align-items: center;
    color: var(--text-color);
    font-size: 0.95rem;
}

.footer-link i {
    margin-right: 10px;
    font-size: 1rem;
    width: 20px;
    color: var(--primary-color);
}

.footer-link:hover {
    opacity: 1;
    color: var(--primary-color);
    padding-left: 5px;
    transform: translateY(-2px);
}

.footer-contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    color: var(--dark-gray);
    font-size: 0.95rem;
}

.footer-contact-item i {
    margin-right: 10px;
    color: var(--primary-color);
    font-size: 1.1rem;
    width: 20px;
}

.qr-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.contact-qr {
    width: 130px;
    height: 130px;
    margin-bottom: 10px;
    padding: 5px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.08);
}

.contact-qr img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 5px;
}

.contact-tip {
    font-size: 0.85rem;
    color: var(--dark-gray);
    text-align: center;
}

.footer-divider {
    height: 1px;
    background-color: rgba(0,0,0,0.08);
    margin: 20px 0;
}

.copyright {
    text-align: center;
    font-size: 0.9rem;
    color: var(--dark-gray);
    padding: 10px 0;
}

.copyright a {
    color: var(--primary-color);
    transition: var(--transition);
}

.copyright a:hover {
    text-decoration: underline;
}

/* 页脚响应式设计 */
@media (max-width: 992px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-column:first-child {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-column:first-child {
        grid-column: span 1;
    }
    
    .footer-column {
        text-align: center;
    }
    
    .footer-column h3::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    .footer-links-list {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .footer-link {
        justify-content: center;
    }
    
    .footer-contact-item {
        justify-content: center;
    }
}

/* 响应式设计优化 */
@media (max-width: 1100px) {
    .hero-content h1 {
        font-size: 3rem;
        white-space: normal;
    }
    
    .hero-content h2 {
        font-size: 2.2rem;
    }
    
    .research-content, .paper-content {
        flex-direction: column;
    }
    
    .research-text, .paper-content {
        text-align: center;
        margin-bottom: 30px;
    }
    
    .comparison-layout {
        flex-direction: column;
    }
    
    .comparison-text {
        text-align: center;
        margin-bottom: 30px;
    }
    
    .feature-list li {
        justify-content: center;
    }
}

@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
    }
    
    .hero-content {
        padding-right: 0;
        margin-bottom: 50px;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .vision-content {
        flex-direction: column;
        align-items: center;
    }
    
    .vision-item {
        margin-bottom: 30px;
        max-width: 100%;
    }
    
    .section-title {
        font-size: 2.2rem;
        margin-bottom: 40px;
    }
    
    .hero-content h1 {
        font-size: 2.8rem;
        white-space: normal;
    }

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

@media (max-width: 768px) {
    nav {
        flex-direction: column;
    }
    
    .logo-container {
        margin-bottom: 15px;
    }
    
    .nav-links {
        margin-top: 20px;
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
    }
    
    .nav-links li {
        margin: 5px 4px;
        width: auto;
    }
    
    .nav-link {
        font-size: 0.9rem;
        padding: 8px 12px;
        width: 100%;
        justify-content: center;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
        white-space: normal;
        line-height: 1.2;
    }
    
    .hero-content h2 {
        font-size: 1.8rem;
    }
    
    .hero-content p {
        font-size: 1.1rem;
        margin-bottom: 30px;
    }
    
    .tab-btn {
        padding: 10px 20px;
        font-size: 1rem;
    }
    
    .testimonial-slider {
        flex-direction: column;
        align-items: center;
    }
    
    .testimonial-card {
        max-width: 100%;
    }
    
    .access-card {
        max-width: 100%;
    }

    .showcase-cards {
        grid-template-columns: 1fr;
    }
    
    .card-image {
        height: 180px;
    }
    
    .section-title {
        font-size: 2rem;
        margin-bottom: 30px;
    }
    
    .section-subtitle {
        font-size: 1.1rem;
        margin-bottom: 30px;
        padding: 0 10px;
    }
    
    .feature-grid {
        gap: 25px;
    }
    
    .feature-card {
        padding: 30px 20px;
    }
    
    .feature-icon {
        height: 60px;
        width: 60px;
        line-height: 60px;
        font-size: 2.2rem;
    }
    
    .feature-card h3 {
        font-size: 1.3rem;
    }
    
    .feature-card p {
        font-size: 0.95rem;
    }
    
    .about-product {
        padding: 25px 20px;
    }
    
    .about-product p {
        font-size: 0.95rem;
        line-height: 1.6;
    }
    
    .vision-item {
        padding: 30px 20px;
    }
    
    .vision-item i {
        height: 70px;
        width: 70px;
        line-height: 70px;
        font-size: 2.5rem;
    }
    
    .quick-access {
        padding: 70px 0;
    }
    
    .access-cards {
        gap: 20px;
    }
    
    .access-card {
        padding: 30px 20px;
    }
    
    .qr-code {
        width: 140px;
        height: 140px;
    }
    
    /* 改进模态框在移动端的体验 */
    .modal-image {
        height: auto;
        min-height: 250px;
        padding: 15px;
    }
    
    .modal-caption h3 {
        font-size: 1.2rem;
    }
    
    .modal-caption p {
        font-size: 0.9rem;
    }
    
    .modal-close {
        top: 10px;
        right: 10px;
        width: 35px;
        height: 35px;
    }

    /* 优化页脚在移动设备上的显示 */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .footer-column:first-child {
        grid-column: span 1;
    }
    
    .footer-column h3::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    .footer-links-list {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .footer-link {
        justify-content: center;
    }
    
    .footer-contact-item {
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .section-title {
        font-size: 1.8rem;
        margin-bottom: 25px;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .brand-name h1 {
        font-size: 1.2rem;
    }
    
    .brand-name span {
        font-size: 0.7rem;
    }
    
    .hero-content h1 {
        font-size: 2rem;
        white-space: normal;
        line-height: 1.2;
    }
    
    .hero-content h2 {
        font-size: 1.5rem;
    }
    
    .hero-content p {
        font-size: 1rem;
        margin-bottom: 25px;
        padding: 0 10px;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .hero {
        padding: 20px 0 50px;
    }
    
    .btn.large-btn {
        padding: 14px 30px;
        font-size: 1.1rem;
    }
    
    .features {
        padding: 60px 0;
    }
    
    .tab-buttons {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    
    .about-product {
        padding: 20px 15px;
    }
    
    .vision-content {
        gap: 30px;
    }
    
    .vision-item {
        padding: 25px 15px;
    }
    
    .vision-item p {
        font-size: 1rem;
    }
    
    .access-card {
        padding: 25px 15px;
    }
    
    .qr-code {
        width: 130px;
        height: 130px;
    }
    
    .product-showcase {
        padding: 60px 0;
    }
    
    .card-content h3 {
        font-size: 1.2rem;
    }
    
    .card-content p {
        font-size: 0.9rem;
    }
    
    .view-btn {
        font-size: 1rem;
        padding: 10px 20px;
    }
    
    /* 模态框进一步优化 */
    .modal-content {
        width: 95%;
        max-height: 95vh;
    }
    
    .modal-image {
        min-height: 200px;
        padding: 10px;
    }
    
    .modal-caption {
        padding: 15px 20px;
    }

    /* 导航条进一步优化 */
    .nav-links {
        flex-direction: column;
        width: 100%;
    }
    
    .nav-links li {
        width: 100%;
        margin: 3px 0;
    }
    
    .nav-link {
        width: 100%;
        text-align: center;
        padding: 10px;
    }
    
    /* 帮助小屏幕手机更好地显示 */
    .container {
        padding: 0 15px;
    }
    
    .footer-content {
        gap: 25px;
    }
    
    .footer-column h3 {
        font-size: 1.2rem;
        margin-bottom: 20px;
    }
    
    .footer-desc {
        font-size: 0.9rem;
    }
    
    .copyright {
        font-size: 0.8rem;
    }
}

/* 适配极小屏幕设备 */
@media (max-width: 375px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .hero-content p {
        font-size: 0.95rem;
    }
    
    .btn.large-btn {
        padding: 12px 25px;
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .feature-card {
        padding: 25px 15px;
    }
    
    .feature-icon {
        height: 50px;
        width: 50px;
        line-height: 50px;
        font-size: 1.8rem;
    }
    
    .feature-card h3 {
        font-size: 1.2rem;
    }
    
    .card-image {
        height: 150px;
        padding: 15px;
    }
    
    .qr-code {
        width: 120px;
        height: 120px;
    }
}

/* 轮播图相关样式可以移除或保留 */
.carousel-section {
    display: none;
}

/* 产品展示区 - 新版卡片样式 */
.product-showcase {
    padding: 100px 0;
    background-color: var(--light-gray);
}

.showcase-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.showcase-card {
    position: relative;
    background-color: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275), 
                box-shadow 0.5s ease;
    cursor: pointer;
    height: 100%;
}

.showcase-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.15);
}

.card-image {
    width: 100%;
    padding: 20px;
    height: 220px;
    overflow: hidden;
}

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

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

.card-content {
    padding: 20px;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.card-content h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.card-content p {
    color: var(--dark-gray);
    font-size: 0.95rem;
    line-height: 1.5;
}

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.view-btn {
    color: white;
    font-size: 1.1rem;
    padding: 12px 24px;
    border-radius: 30px;
    background: rgba(76, 175, 80, 0.9);
    border: none;
    cursor: pointer;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    font-weight: 500;
    font-family: inherit;
}

.view-btn:hover {
    background: var(--primary-color);
    transform: translateY(0) scale(1.05);
}

.showcase-card:hover .card-overlay {
    opacity: 1;
}

.showcase-card:hover .card-overlay .view-btn {
    transform: translateY(0);
}

/* 模态框样式优化 */
.showcase-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    pointer-events: none;
    -webkit-backdrop-filter: blur(3px);
    backdrop-filter: blur(3px);
}

.showcase-modal.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 1000px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    background-color: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
    transform: scale(0.95);
    transition: transform 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.showcase-modal.active .modal-content {
    transform: scale(1);
    animation: modal-pulse 0.4s ease-out;
}

@keyframes modal-pulse {
    0% { transform: scale(0.95); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 40px;
    height: 40px;
    background-color: rgba(0, 0, 0, 0.8);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    z-index: 10;
    color: white;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.modal-close:hover {
    background-color: var(--primary-color);
    transform: rotate(90deg) scale(1.1);
    border-color: white;
}

.modal-image {
    width: 100%;
    height: calc(90vh - 120px);
    min-height: 300px;
    background-color: #f8f8f8;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    padding: 20px;
    position: relative;
}

.modal-image::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.modal-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.modal-caption {
    padding: 20px 25px;
    background-color: white;
    text-align: center;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
}

.modal-caption h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.4rem;
    font-weight: 600;
}

.modal-caption p {
    color: var(--dark-gray);
    font-size: 1rem;
    line-height: 1.5;
    max-width: 800px;
    margin: 0 auto;
}

/* 移动端触摸操作优化 */
@media (max-width: 768px) {
    /* 增大可点击区域 */
    .nav-link, 
    .btn,
    .view-btn,
    .footer-link,
    .access-card {
        /* 适当增大点击区域的内边距 */
        padding: 12px 20px;
    }
    
    /* 增加触摸反馈效果 */
    .nav-link:active,
    .btn:active,
    .view-btn:active,
    .footer-link:active,
    .showcase-card:active,
    .feature-card:active,
    .vision-item:active,
    .access-card:active {
        transform: scale(0.98);
        transition: transform 0.1s ease;
    }
    
    /* 提高轮廓可见性，增强无障碍性 */
    a:focus,
    button:focus,
    input:focus,
    textarea:focus {
        outline: 3px solid rgba(76, 175, 80, 0.5);
        outline-offset: 2px;
    }
    
    /* 模态框关闭按钮增大尺寸，方便触摸 */
    .modal-close {
        width: 44px;
        height: 44px;
    }
    
    /* 卡片查看按钮优化 */
    .view-btn {
        padding: 14px 26px;
        font-size: 1.15rem;
    }
}

/* 适配极小屏幕设备 */
@media (max-width: 375px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .hero-content p {
        font-size: 0.95rem;
    }
    
    .btn.large-btn {
        padding: 12px 25px;
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .feature-card {
        padding: 25px 15px;
    }
    
    .feature-icon {
        height: 50px;
        width: 50px;
        line-height: 50px;
        font-size: 1.8rem;
    }
    
    .feature-card h3 {
        font-size: 1.2rem;
    }
    
    .card-image {
        height: 150px;
        padding: 15px;
    }
    
    .qr-code {
        width: 120px;
        height: 120px;
    }
}

/* 移动端专用优化 - 不影响PC端 */

/* 返回顶部按钮 - 所有设备通用 */
.back-to-top {
    display: block;
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    line-height: 45px;
    font-size: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    transform: translateY(20px);
    cursor: pointer;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

/* 移动端优化 */
@media (max-width: 768px) {
    .back-to-top {
        width: 40px;
        height: 40px;
        line-height: 40px;
        bottom: 20px;
        right: 20px;
    }
}

/* 汉堡菜单按钮 - 仅在移动端显示 */
.hamburger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
    z-index: 200;
    position: relative;
}

.hamburger-menu span {
    display: block;
    height: 3px;
    width: 100%;
    border-radius: 3px;
    background-color: var(--primary-color);
    transition: all 0.3s ease;
}

/* 汉堡菜单点击动画 */
.hamburger-menu.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.hamburger-menu.active span:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* 修复移动导航菜单的基础样式 */
@media (max-width: 768px) {
    .hamburger-menu {
        display: flex;
        margin-left: auto;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -280px;
        width: 280px;
        height: 100vh;
        background-color: white;
        flex-direction: column;
        padding: 80px 20px 40px;
        margin: 0;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        z-index: 100;
        overflow-y: auto;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .nav-links li {
        width: 100%;
        margin: 0 0 15px;
    }
    
    .nav-link {
        display: flex;
        justify-content: flex-start;
        padding: 12px 15px;
        border-radius: 8px;
        font-size: 1rem;
    }
    
    .nav-link i {
        margin-right: 10px;
        width: 20px;
        text-align: center;
    }
    
    /* 导航菜单遮罩层 */
    .mobile-nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 90;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease;
    }
    
    .mobile-nav-overlay.active {
        opacity: 1;
        visibility: visible;
    }
    
    /* 调整页面布局，确保显示完整 */
    .logo-container {
        margin-bottom: 0;
        display: flex;
        align-items: center;
    }
    
    header .container {
        padding: 0 15px;
    }
    
    nav {
        padding: 10px 0;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    /* 导航菜单顶部品牌区域 */
    .nav-links::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 5px;
        background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    }
    
    /* 导航菜单打开动画优化 */
    .nav-links {
        transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }
    
    .nav-links li {
        opacity: 0;
        transform: translateX(10px);
        transition: opacity 0.4s ease, transform 0.4s ease;
        transition-delay: calc(0.05s * var(--item-index, 0));
    }
    
    .nav-links.active li {
        opacity: 1;
        transform: translateX(0);
    }
    
    /* 高亮当前导航项 */
    .nav-link.highlight-link {
        background-color: var(--light-green);
        color: var(--primary-color);
        font-weight: 600;
    }
    
    /* 链接交互效果 */
    .nav-link:hover, 
    .nav-link:active {
        background-color: var(--light-green);
        transform: translateX(5px);
    }
    
    /* 退出导航区按钮 */
    .nav-links::after {
        content: "×";
        position: absolute;
        top: 20px;
        right: 20px;
        font-size: 24px;
        color: var(--dark-gray);
        cursor: pointer;
        opacity: 0.8;
        transition: opacity 0.3s;
        width: 30px;
        height: 30px;
        line-height: 30px;
        text-align: center;
        border-radius: 50%;
    }
    
    .nav-links::after:hover {
        opacity: 1;
        background-color: var(--light-gray);
    }
    
    /* 导航项底部边框 */
    .nav-links li:not(:last-child) {
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        padding-bottom: 15px;
    }
    
    /* 改进汉堡菜单的触摸区域 */
    .hamburger-menu {
        padding: 10px;
        margin: -10px;
    }
}

/* 当导航打开时，防止body滚动 */
body.nav-open {
    overflow: hidden;
}