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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.7;
    color: #2c3e50;
    background-color: #f8f9fa;
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

/* 页面加载器 */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.page-loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid #ffffff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 头部导航 */
header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.08);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

header.scrolled {
    background: rgba(255, 255, 255, 0.99);
    box-shadow: 0 4px 40px rgba(0, 0, 0, 0.12);
}

.nav-menu {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 0;
}

.nav-menu h1 {
    color: #3498db;
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #3498db, #2980b9);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-links a:hover {
    color: #3498db;
    transform: translateY(-2px);
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 140px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    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 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    letter-spacing: -1px;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    min-width: 160px;
    text-align: center;
}

.cta-button.primary {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    box-shadow: 0 8px 25px rgba(231, 76, 60, 0.3);
}

.cta-button.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(231, 76, 60, 0.4);
    background: linear-gradient(135deg, #c0392b, #a93226);
}

.cta-button.secondary {
    background: transparent;
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
}

.cta-button.secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-3px);
}

/* 数字统计部分 */
.counter-section {
    background: white;
    padding: 80px 0;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.counter-section h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 3rem;
    font-weight: 700;
}

.counter-item {
    display: inline-block;
    margin: 0 2rem 2rem;
    text-align: center;
}

.counter-number {
    display: block;
    font-size: 3.5rem;
    font-weight: 700;
    color: #3498db;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.counter-label {
    font-size: 1.1rem;
    color: #7f8c8d;
    font-weight: 500;
}

/* 产品部分 */
.products {
    padding: 120px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.products h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.section-intro {
    text-align: center;
    max-width: 900px;
    margin: 0 auto 4rem;
    font-size: 1.1rem;
    line-height: 1.8;
    color: #5a6c7d;
}

.product-nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.nav-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid #e1e8ed;
    background: white;
    color: #5a6c7d;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-btn:hover,
.nav-btn.active {
    background: #3498db;
    color: white;
    border-color: #3498db;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.3);
}

.product-category {
    margin-bottom: 4rem;
}

.product-category h3 {
    font-size: 2.2rem;
    color: #2c3e50;
    margin-bottom: 1.5rem;
    text-align: center;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    position: relative;
}

.product-category h3::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #3498db, #2980b9);
    border-radius: 2px;
}

.product-category h3 i {
    color: #3498db;
    font-size: 1.8rem;
}

.category-desc {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
    font-size: 1.1rem;
    line-height: 1.7;
    color: #5a6c7d;
}

.product-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2.5rem;
    margin-top: 2.5rem;
}

.product-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    border: 1px solid rgba(0, 0, 0, 0.08);
    position: relative;
}

.product-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.product-card:hover .card-header i {
    transform: scale(1.1);
}

.card-header {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 2.5rem 2rem 2rem;
    text-align: center;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
}

.card-header i {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 1.25rem;
    display: block;
    transition: transform 0.3s ease;
}

.card-header h4 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 0.75rem;
    font-weight: 600;
    line-height: 1.4;
}

.product-tag {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-body {
    padding: 2rem;
}

.product-desc {
    color: #5a6c7d;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.product-features,
.product-benefits {
    margin-bottom: 1.5rem;
}

.product-features h5,
.product-benefits h5 {
    color: #2c3e50;
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.product-features h5::before {
    content: '✓';
    background: #27ae60;
    color: white;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: bold;
}

.product-benefits h5::before {
    content: '★';
    background: #f39c12;
    color: white;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

.product-features ul,
.product-benefits ul {
    list-style: none;
    padding-left: 0;
}

.product-features li,
.product-benefits li {
    color: #5a6c7d;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.5;
}

.product-features li::before {
    content: '•';
    color: #3498db;
    font-weight: bold;
    position: absolute;
    left: 0;
    top: 0;
}

.product-benefits li::before {
    content: '→';
    color: #e74c3c;
    font-weight: bold;
    position: absolute;
    left: 0;
    top: 0;
}

/* 技术架构展示 */
.tech-architecture {
    margin-top: 80px;
    padding: 60px 0;
    background: white;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.tech-architecture h3 {
    text-align: center;
    color: #2c3e50;
    font-size: 2rem;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.tech-architecture h3 i {
    color: #3498db;
}

.architecture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.arch-item {
    text-align: center;
    padding: 30px 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 15px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.arch-item:hover {
    transform: translateY(-5px);
    border-color: #3498db;
    box-shadow: 0 10px 25px rgba(52, 152, 219, 0.2);
}

.arch-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 2rem;
}

.arch-item h4 {
    color: #2c3e50;
    font-size: 1.3rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.tech-details p {
    color: #6c757d;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 8px;
}

.tech-details strong {
    color: #2c3e50;
}

/* 产品优势总结 */
.product-advantages {
    margin-top: 80px;
    text-align: center;
}

.product-advantages h3 {
    color: #2c3e50;
    font-size: 2rem;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.product-advantages h3 i {
    color: #f39c12;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.advantage-item {
    padding: 30px 20px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.advantage-item i {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 20px;
    display: block;
}

.advantage-item h4 {
    color: #2c3e50;
    font-size: 1.3rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.advantage-item p {
    color: #6c757d;
    font-size: 1rem;
    line-height: 1.6;
}

/* 版本卡片样式 */
.product-versions {
    margin-top: 80px;
    text-align: center;
}

.product-versions h3 {
    color: #2c3e50;
    font-size: 2rem;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.product-versions h3 i {
    color: #e74c3c;
}

.version-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.version-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px 20px;
    border-radius: 15px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.version-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.version-card:hover::before {
    opacity: 1;
}

.version-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.3);
}

.version-card i {
    font-size: 2.5rem;
    margin-bottom: 20px;
    display: block;
}

.version-card h4 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.version-card p {
    opacity: 0.9;
    line-height: 1.5;
    font-size: 0.95rem;
}

/* 关于我们 */
.about {
    padding: 80px 0;
    background: #f8f9fa;
}

.about h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 3rem;
    font-weight: bold;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    color: #7f8c8d;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.skills-progress h4 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin: 2rem 0 1rem;
    font-weight: bold;
}

.progress-item {
    margin-bottom: 1.5rem;
}

.progress-item span {
    display: block;
    margin-bottom: 0.5rem;
    color: #34495e;
    font-weight: 500;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #3498db, #2980b9);
    border-radius: 4px;
    transition: width 1s ease;
    width: 0;
}

.about-image {
    text-align: center;
}

.about-image i {
    font-size: 8rem;
    color: #3498db;
    opacity: 0.8;
}

/* 设备部分 */
.equipment {
    padding: 80px 0;
    background: white;
}

.equipment h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 2rem;
    font-weight: bold;
}

.equipment-content {
    text-align: center;
    margin-bottom: 3rem;
}

.equipment-content p {
    font-size: 1.2rem;
    color: #7f8c8d;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
}

.equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.equipment-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.equipment-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.equipment-icon i {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 1.5rem;
    display: block;
}

.equipment-item h4 {
    font-size: 1.4rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    font-weight: bold;
}

.equipment-item p {
    color: #7f8c8d;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.equipment-features {
    list-style: none;
    text-align: left;
}

.equipment-features li {
    color: #7f8c8d;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.equipment-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #27ae60;
    font-weight: bold;
}

/* 案例部分 */
.cases {
    padding: 80px 0;
    background: #f8f9fa;
}

.cases h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 2rem;
    font-weight: bold;
}

.cases-content p {
    text-align: center;
    font-size: 1.2rem;
    color: #7f8c8d;
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.6;
}

.case-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.case-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.case-icon i {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 1.5rem;
    display: block;
}

.case-card h4 {
    font-size: 1.4rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    font-weight: bold;
}

.case-card p {
    color: #7f8c8d;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.case-tags {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.tag {
    background: #e3f2fd;
    color: #1976d2;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* 联系我们 */
.contact {
    padding: 80px 0;
    background: white;
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 3rem;
    font-weight: bold;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.contact-item {
    text-align: center;
    padding: 2rem;
    background: #f8f9fa;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.contact-item i {
    font-size: 2.5rem;
    color: #3498db;
    margin-bottom: 1rem;
    display: block;
}

.contact-item h3 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    font-weight: bold;
}

.contact-item p {
    color: #7f8c8d;
    line-height: 1.6;
}

.customer-service {
    text-align: center;
}

.customer-service h3 {
    font-size: 2rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    font-weight: bold;
}

.customer-service > p {
    font-size: 1.2rem;
    color: #7f8c8d;
    margin-bottom: 3rem;
}

.service-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.service-method {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.service-method:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.service-icon i {
    font-size: 2.5rem;
    color: #3498db;
    margin-bottom: 1rem;
    display: block;
}

.service-method h4 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    font-weight: bold;
}

.service-method p {
    color: #7f8c8d;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.service-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.service-btn.primary {
    background: #3498db;
    color: white;
    border-color: #3498db;
}

.service-btn.primary:hover {
    background: #2980b9;
    border-color: #2980b9;
    transform: translateY(-2px);
}

.service-btn.secondary {
    background: transparent;
    color: #3498db;
    border-color: #3498db;
}

.service-btn.secondary:hover {
    background: #3498db;
    color: white;
    transform: translateY(-2px);
}

.wechat-info {
    background: white;
    padding: 1rem;
    border-radius: 10px;
    margin-top: 1rem;
}

.wechat-id {
    font-weight: bold;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.wechat-desc {
    color: #7f8c8d;
    font-size: 0.9rem;
}

.service-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    justify-content: center;
}

.feature-item i {
    color: #3498db;
    font-size: 1.2rem;
}

.feature-item span {
    color: #2c3e50;
    font-weight: 500;
}

/* 页脚 */
footer {
    background: #2c3e50;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: bold;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #3498db;
}

.footer-section p {
    color: #bdc3c7;
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
}

/* 返回顶部按钮 */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: #3498db;
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: #2980b9;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(52, 152, 219, 0.3);
}

.scroll-top i {
    font-size: 1.2rem;
}

/* 动画效果 */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.6s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.6s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.scale-in {
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.6s ease;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* 特殊效果 */
.neon-text {
    text-shadow: 0 0 10px rgba(52, 152, 219, 0.5);
}

.lightning {
    animation: lightning 3s infinite;
}

@keyframes lightning {
    0%, 90%, 100% { opacity: 1; }
    95% { opacity: 0.8; }
}

.typewriter {
    overflow: hidden;
    border-right: 3px solid #3498db;
    white-space: nowrap;
    animation: typing 3.5s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink-caret {
    from, to { border-color: transparent; }
    50% { border-color: #3498db; }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }
    
    .hero {
        padding: 120px 0 80px;
    }
    
    .hero h1 {
        font-size: 2.5rem;
        line-height: 1.3;
    }
    
    .hero p {
        font-size: 1.1rem;
        margin-bottom: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .cta-button {
        min-width: 200px;
    }
    
    .counter-section {
        padding: 60px 0;
    }
    
    .counter-section h2 {
        font-size: 2rem;
        margin-bottom: 2rem;
    }
    
    .counter-item {
        margin: 0 1rem 1.5rem;
    }
    
    .counter-number {
        font-size: 2.5rem;
    }
    
    .products {
        padding: 80px 0;
    }
    
    .products h2 {
        font-size: 2rem;
    }
    
    .section-intro {
        font-size: 1rem;
        margin-bottom: 3rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .product-cards {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .equipment-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .case-cards {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .service-methods {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .service-features {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .product-nav {
        gap: 0.75rem;
        justify-content: center;
    }
    
    .nav-btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .card-header {
        padding: 2rem 1.5rem 1.5rem;
    }
    
    .card-header i {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }
    
    .card-header h4 {
        font-size: 1.2rem;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .architecture-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .version-cards {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .product-category h3 {
        font-size: 1.5rem;
        text-align: center;
        flex-direction: column;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero h1 {
        font-size: 2rem;
        line-height: 1.2;
    }
    
    .hero p {
        font-size: 1rem;
        line-height: 1.5;
    }
    
    .cta-button {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
        min-width: 180px;
    }
    
    .counter-section h2,
    .products h2,
    .about h2,
    .equipment h2,
    .cases h2,
    .contact h2 {
        font-size: 1.8rem;
        line-height: 1.3;
    }
    
    .section-intro {
        font-size: 0.95rem;
        line-height: 1.6;
    }
    
    .product-nav {
        gap: 0.5rem;
    }
    
    .nav-btn {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }
    
    .card,
    .equipment-item,
    .case-card {
        margin-bottom: 1.5rem;
    }
    
    .card-header {
        padding: 1.5rem 1rem 1rem;
    }
    
    .card-header i {
        font-size: 2rem;
    }
    
    .card-header h4 {
        font-size: 1.1rem;
    }
    
    .card-body {
        padding: 1.25rem 1rem;
    }
    
    .service-features {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .product-category h3 {
        font-size: 1.3rem;
    }
    
    .category-desc {
        font-size: 0.95rem;
    }
}