/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
    overflow-x: hidden;
    font-size: 16px;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-brand img {
    height: 40px;
    width: auto;
}

.nav-brand .logo-dark {
    display: none;
}

.navbar.scrolled .logo-light {
    display: none;
}

.navbar.scrolled .logo-dark {
    display: block;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.login-btn {
    padding: 8px 20px;
    background: var(--primary-color);
    color: white !important;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.login-btn::after {
    display: none;
}

.login-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* 英雄区域 */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,106.7C1248,96,1344,96,1392,96L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
}

.hero-content {
    position: relative;
    text-align: center;
    color: white;
    z-index: 1;
    padding: 0 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 40px;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    display: inline-block;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

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

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-block {
    width: 100%;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
    color: white;
    font-size: 2rem;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* 动画 */
.animate-fade-in {
    animation: fadeIn 1s ease-out;
}

.animate-fade-in-delay {
    animation: fadeIn 1s ease-out 0.3s both;
}

.animate-fade-in-delay-2 {
    animation: fadeIn 1s ease-out 0.6s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 通用区块样式 */
section {
    padding: 80px 0;
}

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

.section-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    margin: 0 auto 15px;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
}

/* 关于我们 */
.about {
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.about-text p {
    margin-bottom: 15px;
    line-height: 1.8;
    color: var(--text-light);
    font-size: 1.05rem;
}

.about-text .highlight {
    font-size: 1.1rem;
    color: var(--text-dark);
    font-weight: 600;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    color: var(--text-light);
    font-size: 0.95rem;
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-image img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

/* 产品中心 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.product-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

.product-image {
    position: relative;
    height: 250px;
    overflow: hidden;
    background: var(--bg-light);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--primary-color);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.product-content {
    padding: 30px;
}

.product-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.product-desc {
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.6;
    font-size: 1.05rem;
}

.product-features {
    list-style: none;
    margin-bottom: 25px;
}

.product-features li {
    padding: 8px 0;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 10px;
}

.product-features i {
    color: var(--success-color);
    font-size: 0.9rem;
}

/* 核心优势 */
.advantages {
    background: var(--bg-light);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.advantage-card {
    background: white;
    padding: 35px 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

.advantage-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.advantage-card p {
    color: var(--text-light);
    line-height: 1.6;
    font-size: 1rem;
}

/* 对比表格 */
.comparison-section {
    margin-top: 60px;
}

.comparison-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 30px;
    color: var(--text-dark);
}

.comparison-table-wrapper {
    overflow-x: auto;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table thead {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
}

.comparison-table th,
.comparison-table td {
    padding: 18px 20px;
    text-align: center;
}

.comparison-table th {
    font-weight: 600;
    font-size: 1.05rem;
}

.comparison-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s ease;
}

.comparison-table tbody tr:hover {
    background: var(--bg-light);
}

.comparison-table tbody tr:last-child {
    border-bottom: none;
}

.comparison-table .highlight-col {
    background: rgba(37, 99, 235, 0.05);
    font-weight: 600;
}

.badge-success {
    display: inline-block;
    padding: 4px 12px;
    background: var(--success-color);
    color: white;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 600;
}

/* 知识产权 */
.patents-showcase {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

.patents-category h3 {
    font-size: 1.6rem;
    margin-bottom: 35px;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.patents-category h3 i {
    color: var(--primary-color);
}

/* 横向滚动轮播 */
.patents-carousel {
    position: relative;
    width: 100%;
    overflow: hidden;
    padding: 20px 0;
    --carousel-card-width: 280px;
    --carousel-gap: 25px;
}

.carousel-track {
    display: flex;
    gap: var(--carousel-gap);
    overflow-x: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    padding: 10px calc((100% - var(--carousel-card-width)) / 2);
    scroll-padding-inline: calc((100% - var(--carousel-card-width)) / 2);
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.carousel-track::-webkit-scrollbar {
    display: none;
}

.patent-item {
    position: relative;
    flex: 0 0 var(--carousel-card-width);
    width: var(--carousel-card-width);
    aspect-ratio: 3 / 4;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    transition: transform 0.35s ease, opacity 0.35s ease, box-shadow 0.35s ease;
    scroll-snap-align: center;
    opacity: 0.6;
    transform: scale(0.9);
}

.patent-item img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    background: #fff;
}

.patent-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.9), rgba(59, 130, 246, 0.9));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.patent-item:hover .patent-overlay {
    opacity: 1;
}

.patent-item.is-active {
    opacity: 1;
    transform: scale(1);
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.28);
}

.patent-overlay i {
    color: white;
    font-size: 3rem;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: white;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    color: var(--primary-color);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.carousel-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.carousel-btn.prev {
    left: 20px;
}

.carousel-btn.next {
    right: 20px;
}

.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
}

.carousel-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.carousel-indicator.active {
    background: var(--primary-color);
    width: 30px;
    border-radius: 5px;
}

/* 联系我们 */
.contact {
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 20px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.contact-item-large {
    padding: 25px;
}

.contact-item-highlight {
    background: linear-gradient(135deg, #e0f2fe 0%, #dbeafe 100%);
    border: 2px solid var(--primary-color);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.wechat-icon {
    background: linear-gradient(135deg, #07c160, #06ae56);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

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

.contact-text p {
    color: var(--text-light);
    line-height: 1.6;
}

.contact-text a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-text a:hover {
    color: var(--secondary-color);
}

.wechat-link {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color) !important;
    font-weight: 600;
    font-size: 1.05rem;
}

.wechat-link:hover {
    color: var(--secondary-color) !important;
}

.wechat-qr-image {
    width: 100%;
    max-width: 300px;
    height: auto;
    margin: 20px auto;
    display: block;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}

.wechat-tip {
    color: #ef4444;
    font-weight: 600;
    margin-top: 15px;
    font-size: 0.95rem;
}

/* 复制成功提示 */
.copy-toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: #10b981;
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
    z-index: 10000;
    opacity: 0;
    transition: all 0.3s ease;
}

.copy-toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.copy-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.copy-btn i {
    font-size: 1rem;
}

.contact-form-wrapper {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group input,
.form-group textarea {
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 40px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-logo img {
    height: 50px;
    width: auto;
}

.footer-logo p {
    font-size: 0.9rem;
    opacity: 0.8;
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    opacity: 0.6;
    font-size: 0.9rem;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 16px;
    padding: 40px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: modalSlideIn 0.3s ease-out;
}

.modal-large {
    max-width: 900px;
}

.modal-small {
    max-width: 400px;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 2rem;
    color: var(--text-light);
    cursor: pointer;
    transition: color 0.3s ease;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-dark);
}

.wechat-qr-content {
    text-align: center;
}

.wechat-qr-content h3 {
    margin-bottom: 20px;
    color: var(--text-dark);
}

.wechat-number {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 20px 0;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 8px;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-5px);
}

/* 响应式设计 */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: white;
        flex-direction: column;
        padding: 40px 20px;
        gap: 20px;
        transition: left 0.3s ease;
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

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

    .patents-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    .footer-content {
        flex-direction: column;
        gap: 30px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .section-title {
        font-size: 2rem;
    }

    .modal-content {
        padding: 30px 20px;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .advantage-card {
        padding: 20px 15px;
    }

    .advantage-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }

    .advantage-card h3 {
        font-size: 1rem;
    }

    .advantage-card p {
        font-size: 0.85rem;
    }

    .carousel-btn {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 12px 10px;
        font-size: 0.9rem;
    }

    .contact-form-wrapper {
        padding: 25px;
    }

    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
    }
}

/* 横向滚动轮播响应式 */
@media (max-width: 968px) {
    .patents-carousel {
        --carousel-card-width: 240px;
        --carousel-gap: 18px;
    }

    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }
}

@media (max-width: 640px) {
    .patents-carousel {
        --carousel-card-width: min(72vw, 240px);
        --carousel-gap: 14px;
    }

    .carousel-btn {
        width: 34px;
        height: 34px;
        font-size: 1rem;
    }

    .carousel-btn.prev {
        left: 6px;
    }

    .carousel-btn.next {
        right: 6px;
    }
}